| 1 | /************************************************* |
| 2 | * Exim - an Internet mail transport agent * |
| 3 | *************************************************/ |
| 4 | |
| 5 | /* Copyright (c) University of Cambridge 1995 - 2018 */ |
| 6 | /* Copyright (c) The Exim Maintainers 2020 */ |
| 7 | /* See the file NOTICE for conditions of use and distribution. */ |
| 8 | |
| 9 | /* The main code for delivering a message. */ |
| 10 | |
| 11 | |
| 12 | #include "exim.h" |
| 13 | #include "transports/smtp.h" |
| 14 | #include <sys/uio.h> |
| 15 | #include <assert.h> |
| 16 | |
| 17 | |
| 18 | /* Data block for keeping track of subprocesses for parallel remote |
| 19 | delivery. */ |
| 20 | |
| 21 | typedef struct pardata { |
| 22 | address_item *addrlist; /* chain of addresses */ |
| 23 | address_item *addr; /* next address data expected for */ |
| 24 | pid_t pid; /* subprocess pid */ |
| 25 | int fd; /* pipe fd for getting result from subprocess */ |
| 26 | int transport_count; /* returned transport count value */ |
| 27 | BOOL done; /* no more data needed */ |
| 28 | uschar *msg; /* error message */ |
| 29 | uschar *return_path; /* return_path for these addresses */ |
| 30 | } pardata; |
| 31 | |
| 32 | /* Values for the process_recipients variable */ |
| 33 | |
| 34 | enum { RECIP_ACCEPT, RECIP_IGNORE, RECIP_DEFER, |
| 35 | RECIP_FAIL, RECIP_FAIL_FILTER, RECIP_FAIL_TIMEOUT, |
| 36 | RECIP_FAIL_LOOP}; |
| 37 | |
| 38 | /* Mutually recursive functions for marking addresses done. */ |
| 39 | |
| 40 | static void child_done(address_item *, uschar *); |
| 41 | static void address_done(address_item *, uschar *); |
| 42 | |
| 43 | /* Table for turning base-62 numbers into binary */ |
| 44 | |
| 45 | static uschar tab62[] = |
| 46 | {0,1,2,3,4,5,6,7,8,9,0,0,0,0,0,0, /* 0-9 */ |
| 47 | 0,10,11,12,13,14,15,16,17,18,19,20, /* A-K */ |
| 48 | 21,22,23,24,25,26,27,28,29,30,31,32, /* L-W */ |
| 49 | 33,34,35, 0, 0, 0, 0, 0, /* X-Z */ |
| 50 | 0,36,37,38,39,40,41,42,43,44,45,46, /* a-k */ |
| 51 | 47,48,49,50,51,52,53,54,55,56,57,58, /* l-w */ |
| 52 | 59,60,61}; /* x-z */ |
| 53 | |
| 54 | |
| 55 | /************************************************* |
| 56 | * Local static variables * |
| 57 | *************************************************/ |
| 58 | |
| 59 | /* addr_duplicate is global because it needs to be seen from the Envelope-To |
| 60 | writing code. */ |
| 61 | |
| 62 | static address_item *addr_defer = NULL; |
| 63 | static address_item *addr_failed = NULL; |
| 64 | static address_item *addr_fallback = NULL; |
| 65 | static address_item *addr_local = NULL; |
| 66 | static address_item *addr_new = NULL; |
| 67 | static address_item *addr_remote = NULL; |
| 68 | static address_item *addr_route = NULL; |
| 69 | static address_item *addr_succeed = NULL; |
| 70 | static address_item *addr_senddsn = NULL; |
| 71 | |
| 72 | static FILE *message_log = NULL; |
| 73 | static BOOL update_spool; |
| 74 | static BOOL remove_journal; |
| 75 | static int parcount = 0; |
| 76 | static pardata *parlist = NULL; |
| 77 | static int return_count; |
| 78 | static uschar *frozen_info = US""; |
| 79 | static uschar *used_return_path = NULL; |
| 80 | |
| 81 | |
| 82 | |
| 83 | /************************************************* |
| 84 | * read as much as requested * |
| 85 | *************************************************/ |
| 86 | |
| 87 | /* The syscall read(2) doesn't always returns as much as we want. For |
| 88 | several reasons it might get less. (Not talking about signals, as syscalls |
| 89 | are restartable). When reading from a network or pipe connection the sender |
| 90 | might send in smaller chunks, with delays between these chunks. The read(2) |
| 91 | may return such a chunk. |
| 92 | |
| 93 | The more the writer writes and the smaller the pipe between write and read is, |
| 94 | the more we get the chance of reading leass than requested. (See bug 2130) |
| 95 | |
| 96 | This function read(2)s until we got all the data we *requested*. |
| 97 | |
| 98 | Note: This function may block. Use it only if you're sure about the |
| 99 | amount of data you will get. |
| 100 | |
| 101 | Argument: |
| 102 | fd the file descriptor to read from |
| 103 | buffer pointer to a buffer of size len |
| 104 | len the requested(!) amount of bytes |
| 105 | |
| 106 | Returns: the amount of bytes read |
| 107 | */ |
| 108 | static ssize_t |
| 109 | readn(int fd, void * buffer, size_t len) |
| 110 | { |
| 111 | uschar * next = buffer; |
| 112 | uschar * end = next + len; |
| 113 | |
| 114 | while (next < end) |
| 115 | { |
| 116 | ssize_t got = read(fd, next, end - next); |
| 117 | |
| 118 | /* I'm not sure if there are signals that can interrupt us, |
| 119 | for now I assume the worst */ |
| 120 | if (got == -1 && errno == EINTR) continue; |
| 121 | if (got <= 0) return next - US buffer; |
| 122 | next += got; |
| 123 | } |
| 124 | |
| 125 | return len; |
| 126 | } |
| 127 | |
| 128 | |
| 129 | /************************************************* |
| 130 | * Make a new address item * |
| 131 | *************************************************/ |
| 132 | |
| 133 | /* This function gets the store and initializes with default values. The |
| 134 | transport_return value defaults to DEFER, so that any unexpected failure to |
| 135 | deliver does not wipe out the message. The default unique string is set to a |
| 136 | copy of the address, so that its domain can be lowercased. |
| 137 | |
| 138 | Argument: |
| 139 | address the RFC822 address string |
| 140 | copy force a copy of the address |
| 141 | |
| 142 | Returns: a pointer to an initialized address_item |
| 143 | */ |
| 144 | |
| 145 | address_item * |
| 146 | deliver_make_addr(uschar *address, BOOL copy) |
| 147 | { |
| 148 | address_item *addr = store_get(sizeof(address_item), FALSE); |
| 149 | *addr = address_defaults; |
| 150 | if (copy) address = string_copy(address); |
| 151 | addr->address = address; |
| 152 | addr->unique = string_copy(address); |
| 153 | return addr; |
| 154 | } |
| 155 | |
| 156 | |
| 157 | |
| 158 | |
| 159 | /************************************************* |
| 160 | * Set expansion values for an address * |
| 161 | *************************************************/ |
| 162 | |
| 163 | /* Certain expansion variables are valid only when handling an address or |
| 164 | address list. This function sets them up or clears the values, according to its |
| 165 | argument. |
| 166 | |
| 167 | Arguments: |
| 168 | addr the address in question, or NULL to clear values |
| 169 | Returns: nothing |
| 170 | */ |
| 171 | |
| 172 | void |
| 173 | deliver_set_expansions(address_item *addr) |
| 174 | { |
| 175 | if (!addr) |
| 176 | { |
| 177 | const uschar ***p = address_expansions; |
| 178 | while (*p) **p++ = NULL; |
| 179 | return; |
| 180 | } |
| 181 | |
| 182 | /* Exactly what gets set depends on whether there is one or more addresses, and |
| 183 | what they contain. These first ones are always set, taking their values from |
| 184 | the first address. */ |
| 185 | |
| 186 | if (!addr->host_list) |
| 187 | { |
| 188 | deliver_host = deliver_host_address = US""; |
| 189 | deliver_host_port = 0; |
| 190 | } |
| 191 | else |
| 192 | { |
| 193 | deliver_host = addr->host_list->name; |
| 194 | deliver_host_address = addr->host_list->address; |
| 195 | deliver_host_port = addr->host_list->port; |
| 196 | } |
| 197 | |
| 198 | deliver_recipients = addr; |
| 199 | deliver_address_data = addr->prop.address_data; |
| 200 | deliver_domain_data = addr->prop.domain_data; |
| 201 | deliver_localpart_data = addr->prop.localpart_data; |
| 202 | router_var = addr->prop.variables; |
| 203 | |
| 204 | /* These may be unset for multiple addresses */ |
| 205 | |
| 206 | deliver_domain = addr->domain; |
| 207 | self_hostname = addr->self_hostname; |
| 208 | |
| 209 | #ifdef EXPERIMENTAL_BRIGHTMAIL |
| 210 | bmi_deliver = 1; /* deliver by default */ |
| 211 | bmi_alt_location = NULL; |
| 212 | bmi_base64_verdict = NULL; |
| 213 | bmi_base64_tracker_verdict = NULL; |
| 214 | #endif |
| 215 | |
| 216 | /* If there's only one address we can set everything. */ |
| 217 | |
| 218 | if (!addr->next) |
| 219 | { |
| 220 | address_item *addr_orig; |
| 221 | |
| 222 | deliver_localpart = addr->local_part; |
| 223 | deliver_localpart_prefix = addr->prefix; |
| 224 | deliver_localpart_prefix_v = addr->prefix_v; |
| 225 | deliver_localpart_suffix = addr->suffix; |
| 226 | deliver_localpart_suffix_v = addr->suffix_v; |
| 227 | |
| 228 | for (addr_orig = addr; addr_orig->parent; addr_orig = addr_orig->parent) ; |
| 229 | deliver_domain_orig = addr_orig->domain; |
| 230 | |
| 231 | /* Re-instate any prefix and suffix in the original local part. In all |
| 232 | normal cases, the address will have a router associated with it, and we can |
| 233 | choose the caseful or caseless version accordingly. However, when a system |
| 234 | filter sets up a pipe, file, or autoreply delivery, no router is involved. |
| 235 | In this case, though, there won't be any prefix or suffix to worry about. */ |
| 236 | |
| 237 | deliver_localpart_orig = !addr_orig->router |
| 238 | ? addr_orig->local_part |
| 239 | : addr_orig->router->caseful_local_part |
| 240 | ? addr_orig->cc_local_part |
| 241 | : addr_orig->lc_local_part; |
| 242 | |
| 243 | /* If there's a parent, make its domain and local part available, and if |
| 244 | delivering to a pipe or file, or sending an autoreply, get the local |
| 245 | part from the parent. For pipes and files, put the pipe or file string |
| 246 | into address_pipe and address_file. */ |
| 247 | |
| 248 | if (addr->parent) |
| 249 | { |
| 250 | deliver_domain_parent = addr->parent->domain; |
| 251 | deliver_localpart_parent = !addr->parent->router |
| 252 | ? addr->parent->local_part |
| 253 | : addr->parent->router->caseful_local_part |
| 254 | ? addr->parent->cc_local_part |
| 255 | : addr->parent->lc_local_part; |
| 256 | |
| 257 | /* File deliveries have their own flag because they need to be picked out |
| 258 | as special more often. */ |
| 259 | |
| 260 | if (testflag(addr, af_pfr)) |
| 261 | { |
| 262 | if (testflag(addr, af_file)) address_file = addr->local_part; |
| 263 | else if (deliver_localpart[0] == '|') address_pipe = addr->local_part; |
| 264 | deliver_localpart = addr->parent->local_part; |
| 265 | deliver_localpart_prefix = addr->parent->prefix; |
| 266 | deliver_localpart_prefix_v = addr->parent->prefix_v; |
| 267 | deliver_localpart_suffix = addr->parent->suffix; |
| 268 | deliver_localpart_suffix_v = addr->parent->suffix_v; |
| 269 | } |
| 270 | } |
| 271 | |
| 272 | #ifdef EXPERIMENTAL_BRIGHTMAIL |
| 273 | /* Set expansion variables related to Brightmail AntiSpam */ |
| 274 | bmi_base64_verdict = bmi_get_base64_verdict(deliver_localpart_orig, deliver_domain_orig); |
| 275 | bmi_base64_tracker_verdict = bmi_get_base64_tracker_verdict(bmi_base64_verdict); |
| 276 | /* get message delivery status (0 - don't deliver | 1 - deliver) */ |
| 277 | bmi_deliver = bmi_get_delivery_status(bmi_base64_verdict); |
| 278 | /* if message is to be delivered, get eventual alternate location */ |
| 279 | if (bmi_deliver == 1) |
| 280 | bmi_alt_location = bmi_get_alt_location(bmi_base64_verdict); |
| 281 | #endif |
| 282 | |
| 283 | } |
| 284 | |
| 285 | /* For multiple addresses, don't set local part, and leave the domain and |
| 286 | self_hostname set only if it is the same for all of them. It is possible to |
| 287 | have multiple pipe and file addresses, but only when all addresses have routed |
| 288 | to the same pipe or file. */ |
| 289 | |
| 290 | else |
| 291 | { |
| 292 | if (testflag(addr, af_pfr)) |
| 293 | { |
| 294 | if (testflag(addr, af_file)) address_file = addr->local_part; |
| 295 | else if (addr->local_part[0] == '|') address_pipe = addr->local_part; |
| 296 | } |
| 297 | for (address_item * addr2 = addr->next; addr2; addr2 = addr2->next) |
| 298 | { |
| 299 | if (deliver_domain && Ustrcmp(deliver_domain, addr2->domain) != 0) |
| 300 | deliver_domain = NULL; |
| 301 | if ( self_hostname |
| 302 | && ( !addr2->self_hostname |
| 303 | || Ustrcmp(self_hostname, addr2->self_hostname) != 0 |
| 304 | ) ) |
| 305 | self_hostname = NULL; |
| 306 | if (!deliver_domain && !self_hostname) break; |
| 307 | } |
| 308 | } |
| 309 | } |
| 310 | |
| 311 | |
| 312 | |
| 313 | |
| 314 | /************************************************* |
| 315 | * Open a msglog file * |
| 316 | *************************************************/ |
| 317 | |
| 318 | /* This function is used both for normal message logs, and for files in the |
| 319 | msglog directory that are used to catch output from pipes. Try to create the |
| 320 | directory if it does not exist. From release 4.21, normal message logs should |
| 321 | be created when the message is received. |
| 322 | |
| 323 | Called from deliver_message(), can be operating as root. |
| 324 | |
| 325 | Argument: |
| 326 | filename the file name |
| 327 | mode the mode required |
| 328 | error used for saying what failed |
| 329 | |
| 330 | Returns: a file descriptor, or -1 (with errno set) |
| 331 | */ |
| 332 | |
| 333 | static int |
| 334 | open_msglog_file(uschar *filename, int mode, uschar **error) |
| 335 | { |
| 336 | if (Ustrstr(filename, US"/../")) |
| 337 | log_write(0, LOG_MAIN|LOG_PANIC, |
| 338 | "Attempt to open msglog file path with upward-traversal: '%s'\n", filename); |
| 339 | |
| 340 | for (int i = 2; i > 0; i--) |
| 341 | { |
| 342 | int fd = Uopen(filename, |
| 343 | #ifdef O_CLOEXEC |
| 344 | O_CLOEXEC | |
| 345 | #endif |
| 346 | #ifdef O_NOFOLLOW |
| 347 | O_NOFOLLOW | |
| 348 | #endif |
| 349 | O_WRONLY|O_APPEND|O_CREAT, mode); |
| 350 | if (fd >= 0) |
| 351 | { |
| 352 | /* Set the close-on-exec flag and change the owner to the exim uid/gid (this |
| 353 | function is called as root). Double check the mode, because the group setting |
| 354 | doesn't always get set automatically. */ |
| 355 | |
| 356 | #ifndef O_CLOEXEC |
| 357 | (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC); |
| 358 | #endif |
| 359 | if (exim_fchown(fd, exim_uid, exim_gid, filename) < 0) |
| 360 | { |
| 361 | *error = US"chown"; |
| 362 | return -1; |
| 363 | } |
| 364 | if (fchmod(fd, mode) < 0) |
| 365 | { |
| 366 | *error = US"chmod"; |
| 367 | return -1; |
| 368 | } |
| 369 | return fd; |
| 370 | } |
| 371 | if (errno != ENOENT) |
| 372 | break; |
| 373 | |
| 374 | (void)directory_make(spool_directory, |
| 375 | spool_sname(US"msglog", message_subdir), |
| 376 | MSGLOG_DIRECTORY_MODE, TRUE); |
| 377 | } |
| 378 | |
| 379 | *error = US"create or open"; |
| 380 | return -1; |
| 381 | } |
| 382 | |
| 383 | |
| 384 | |
| 385 | |
| 386 | /************************************************* |
| 387 | * Write to msglog if required * |
| 388 | *************************************************/ |
| 389 | |
| 390 | /* Write to the message log, if configured. This function may also be called |
| 391 | from transports. |
| 392 | |
| 393 | Arguments: |
| 394 | format a string format |
| 395 | |
| 396 | Returns: nothing |
| 397 | */ |
| 398 | |
| 399 | void |
| 400 | deliver_msglog(const char *format, ...) |
| 401 | { |
| 402 | va_list ap; |
| 403 | if (!message_logs) return; |
| 404 | va_start(ap, format); |
| 405 | vfprintf(message_log, format, ap); |
| 406 | fflush(message_log); |
| 407 | va_end(ap); |
| 408 | } |
| 409 | |
| 410 | |
| 411 | |
| 412 | |
| 413 | /************************************************* |
| 414 | * Replicate status for batch * |
| 415 | *************************************************/ |
| 416 | |
| 417 | /* When a transport handles a batch of addresses, it may treat them |
| 418 | individually, or it may just put the status in the first one, and return FALSE, |
| 419 | requesting that the status be copied to all the others externally. This is the |
| 420 | replication function. As well as the status, it copies the transport pointer, |
| 421 | which may have changed if appendfile passed the addresses on to a different |
| 422 | transport. |
| 423 | |
| 424 | Argument: pointer to the first address in a chain |
| 425 | Returns: nothing |
| 426 | */ |
| 427 | |
| 428 | static void |
| 429 | replicate_status(address_item *addr) |
| 430 | { |
| 431 | for (address_item * addr2 = addr->next; addr2; addr2 = addr2->next) |
| 432 | { |
| 433 | addr2->transport = addr->transport; |
| 434 | addr2->transport_return = addr->transport_return; |
| 435 | addr2->basic_errno = addr->basic_errno; |
| 436 | addr2->more_errno = addr->more_errno; |
| 437 | addr2->delivery_time = addr->delivery_time; |
| 438 | addr2->special_action = addr->special_action; |
| 439 | addr2->message = addr->message; |
| 440 | addr2->user_message = addr->user_message; |
| 441 | } |
| 442 | } |
| 443 | |
| 444 | |
| 445 | |
| 446 | /************************************************* |
| 447 | * Compare lists of hosts * |
| 448 | *************************************************/ |
| 449 | |
| 450 | /* This function is given two pointers to chains of host items, and it yields |
| 451 | TRUE if the lists refer to the same hosts in the same order, except that |
| 452 | |
| 453 | (1) Multiple hosts with the same non-negative MX values are permitted to appear |
| 454 | in different orders. Round-robinning nameservers can cause this to happen. |
| 455 | |
| 456 | (2) Multiple hosts with the same negative MX values less than MX_NONE are also |
| 457 | permitted to appear in different orders. This is caused by randomizing |
| 458 | hosts lists. |
| 459 | |
| 460 | This enables Exim to use a single SMTP transaction for sending to two entirely |
| 461 | different domains that happen to end up pointing at the same hosts. |
| 462 | |
| 463 | Arguments: |
| 464 | one points to the first host list |
| 465 | two points to the second host list |
| 466 | |
| 467 | Returns: TRUE if the lists refer to the same host set |
| 468 | */ |
| 469 | |
| 470 | static BOOL |
| 471 | same_hosts(host_item *one, host_item *two) |
| 472 | { |
| 473 | while (one && two) |
| 474 | { |
| 475 | if (Ustrcmp(one->name, two->name) != 0) |
| 476 | { |
| 477 | int mx = one->mx; |
| 478 | host_item *end_one = one; |
| 479 | host_item *end_two = two; |
| 480 | |
| 481 | /* Batch up only if there was no MX and the list was not randomized */ |
| 482 | |
| 483 | if (mx == MX_NONE) return FALSE; |
| 484 | |
| 485 | /* Find the ends of the shortest sequence of identical MX values */ |
| 486 | |
| 487 | while ( end_one->next && end_one->next->mx == mx |
| 488 | && end_two->next && end_two->next->mx == mx) |
| 489 | { |
| 490 | end_one = end_one->next; |
| 491 | end_two = end_two->next; |
| 492 | } |
| 493 | |
| 494 | /* If there aren't any duplicates, there's no match. */ |
| 495 | |
| 496 | if (end_one == one) return FALSE; |
| 497 | |
| 498 | /* For each host in the 'one' sequence, check that it appears in the 'two' |
| 499 | sequence, returning FALSE if not. */ |
| 500 | |
| 501 | for (;;) |
| 502 | { |
| 503 | host_item *hi; |
| 504 | for (hi = two; hi != end_two->next; hi = hi->next) |
| 505 | if (Ustrcmp(one->name, hi->name) == 0) break; |
| 506 | if (hi == end_two->next) return FALSE; |
| 507 | if (one == end_one) break; |
| 508 | one = one->next; |
| 509 | } |
| 510 | |
| 511 | /* All the hosts in the 'one' sequence were found in the 'two' sequence. |
| 512 | Ensure both are pointing at the last host, and carry on as for equality. */ |
| 513 | |
| 514 | two = end_two; |
| 515 | } |
| 516 | |
| 517 | /* if the names matched but ports do not, mismatch */ |
| 518 | else if (one->port != two->port) |
| 519 | return FALSE; |
| 520 | |
| 521 | /* Hosts matched */ |
| 522 | |
| 523 | one = one->next; |
| 524 | two = two->next; |
| 525 | } |
| 526 | |
| 527 | /* True if both are NULL */ |
| 528 | |
| 529 | return (one == two); |
| 530 | } |
| 531 | |
| 532 | |
| 533 | |
| 534 | /************************************************* |
| 535 | * Compare header lines * |
| 536 | *************************************************/ |
| 537 | |
| 538 | /* This function is given two pointers to chains of header items, and it yields |
| 539 | TRUE if they are the same header texts in the same order. |
| 540 | |
| 541 | Arguments: |
| 542 | one points to the first header list |
| 543 | two points to the second header list |
| 544 | |
| 545 | Returns: TRUE if the lists refer to the same header set |
| 546 | */ |
| 547 | |
| 548 | static BOOL |
| 549 | same_headers(header_line *one, header_line *two) |
| 550 | { |
| 551 | for (;; one = one->next, two = two->next) |
| 552 | { |
| 553 | if (one == two) return TRUE; /* Includes the case where both NULL */ |
| 554 | if (!one || !two) return FALSE; |
| 555 | if (Ustrcmp(one->text, two->text) != 0) return FALSE; |
| 556 | } |
| 557 | } |
| 558 | |
| 559 | |
| 560 | |
| 561 | /************************************************* |
| 562 | * Compare string settings * |
| 563 | *************************************************/ |
| 564 | |
| 565 | /* This function is given two pointers to strings, and it returns |
| 566 | TRUE if they are the same pointer, or if the two strings are the same. |
| 567 | |
| 568 | Arguments: |
| 569 | one points to the first string |
| 570 | two points to the second string |
| 571 | |
| 572 | Returns: TRUE or FALSE |
| 573 | */ |
| 574 | |
| 575 | static BOOL |
| 576 | same_strings(uschar *one, uschar *two) |
| 577 | { |
| 578 | if (one == two) return TRUE; /* Includes the case where both NULL */ |
| 579 | if (!one || !two) return FALSE; |
| 580 | return (Ustrcmp(one, two) == 0); |
| 581 | } |
| 582 | |
| 583 | |
| 584 | |
| 585 | /************************************************* |
| 586 | * Compare uid/gid for addresses * |
| 587 | *************************************************/ |
| 588 | |
| 589 | /* This function is given a transport and two addresses. It yields TRUE if the |
| 590 | uid/gid/initgroups settings for the two addresses are going to be the same when |
| 591 | they are delivered. |
| 592 | |
| 593 | Arguments: |
| 594 | tp the transort |
| 595 | addr1 the first address |
| 596 | addr2 the second address |
| 597 | |
| 598 | Returns: TRUE or FALSE |
| 599 | */ |
| 600 | |
| 601 | static BOOL |
| 602 | same_ugid(transport_instance *tp, address_item *addr1, address_item *addr2) |
| 603 | { |
| 604 | if ( !tp->uid_set && !tp->expand_uid |
| 605 | && !tp->deliver_as_creator |
| 606 | && ( testflag(addr1, af_uid_set) != testflag(addr2, af_gid_set) |
| 607 | || ( testflag(addr1, af_uid_set) |
| 608 | && ( addr1->uid != addr2->uid |
| 609 | || testflag(addr1, af_initgroups) != testflag(addr2, af_initgroups) |
| 610 | ) ) ) ) |
| 611 | return FALSE; |
| 612 | |
| 613 | if ( !tp->gid_set && !tp->expand_gid |
| 614 | && ( testflag(addr1, af_gid_set) != testflag(addr2, af_gid_set) |
| 615 | || ( testflag(addr1, af_gid_set) |
| 616 | && addr1->gid != addr2->gid |
| 617 | ) ) ) |
| 618 | return FALSE; |
| 619 | |
| 620 | return TRUE; |
| 621 | } |
| 622 | |
| 623 | |
| 624 | |
| 625 | |
| 626 | /************************************************* |
| 627 | * Record that an address is complete * |
| 628 | *************************************************/ |
| 629 | |
| 630 | /* This function records that an address is complete. This is straightforward |
| 631 | for most addresses, where the unique address is just the full address with the |
| 632 | domain lower cased. For homonyms (addresses that are the same as one of their |
| 633 | ancestors) their are complications. Their unique addresses have \x\ prepended |
| 634 | (where x = 0, 1, 2...), so that de-duplication works correctly for siblings and |
| 635 | cousins. |
| 636 | |
| 637 | Exim used to record the unique addresses of homonyms as "complete". This, |
| 638 | however, fails when the pattern of redirection varies over time (e.g. if taking |
| 639 | unseen copies at only some times of day) because the prepended numbers may vary |
| 640 | from one delivery run to the next. This problem is solved by never recording |
| 641 | prepended unique addresses as complete. Instead, when a homonymic address has |
| 642 | actually been delivered via a transport, we record its basic unique address |
| 643 | followed by the name of the transport. This is checked in subsequent delivery |
| 644 | runs whenever an address is routed to a transport. |
| 645 | |
| 646 | If the completed address is a top-level one (has no parent, which means it |
| 647 | cannot be homonymic) we also add the original address to the non-recipients |
| 648 | tree, so that it gets recorded in the spool file and therefore appears as |
| 649 | "done" in any spool listings. The original address may differ from the unique |
| 650 | address in the case of the domain. |
| 651 | |
| 652 | Finally, this function scans the list of duplicates, marks as done any that |
| 653 | match this address, and calls child_done() for their ancestors. |
| 654 | |
| 655 | Arguments: |
| 656 | addr address item that has been completed |
| 657 | now current time as a string |
| 658 | |
| 659 | Returns: nothing |
| 660 | */ |
| 661 | |
| 662 | static void |
| 663 | address_done(address_item *addr, uschar *now) |
| 664 | { |
| 665 | update_spool = TRUE; /* Ensure spool gets updated */ |
| 666 | |
| 667 | /* Top-level address */ |
| 668 | |
| 669 | if (!addr->parent) |
| 670 | { |
| 671 | tree_add_nonrecipient(addr->unique); |
| 672 | tree_add_nonrecipient(addr->address); |
| 673 | } |
| 674 | |
| 675 | /* Homonymous child address */ |
| 676 | |
| 677 | else if (testflag(addr, af_homonym)) |
| 678 | { |
| 679 | if (addr->transport) |
| 680 | tree_add_nonrecipient( |
| 681 | string_sprintf("%s/%s", addr->unique + 3, addr->transport->name)); |
| 682 | } |
| 683 | |
| 684 | /* Non-homonymous child address */ |
| 685 | |
| 686 | else tree_add_nonrecipient(addr->unique); |
| 687 | |
| 688 | /* Check the list of duplicate addresses and ensure they are now marked |
| 689 | done as well. */ |
| 690 | |
| 691 | for (address_item * dup = addr_duplicate; dup; dup = dup->next) |
| 692 | if (Ustrcmp(addr->unique, dup->unique) == 0) |
| 693 | { |
| 694 | tree_add_nonrecipient(dup->unique); |
| 695 | child_done(dup, now); |
| 696 | } |
| 697 | } |
| 698 | |
| 699 | |
| 700 | |
| 701 | |
| 702 | /************************************************* |
| 703 | * Decrease counts in parents and mark done * |
| 704 | *************************************************/ |
| 705 | |
| 706 | /* This function is called when an address is complete. If there is a parent |
| 707 | address, its count of children is decremented. If there are still other |
| 708 | children outstanding, the function exits. Otherwise, if the count has become |
| 709 | zero, address_done() is called to mark the parent and its duplicates complete. |
| 710 | Then loop for any earlier ancestors. |
| 711 | |
| 712 | Arguments: |
| 713 | addr points to the completed address item |
| 714 | now the current time as a string, for writing to the message log |
| 715 | |
| 716 | Returns: nothing |
| 717 | */ |
| 718 | |
| 719 | static void |
| 720 | child_done(address_item *addr, uschar *now) |
| 721 | { |
| 722 | while (addr->parent) |
| 723 | { |
| 724 | address_item *aa; |
| 725 | |
| 726 | addr = addr->parent; |
| 727 | if (--addr->child_count > 0) return; /* Incomplete parent */ |
| 728 | address_done(addr, now); |
| 729 | |
| 730 | /* Log the completion of all descendents only when there is no ancestor with |
| 731 | the same original address. */ |
| 732 | |
| 733 | for (aa = addr->parent; aa; aa = aa->parent) |
| 734 | if (Ustrcmp(aa->address, addr->address) == 0) break; |
| 735 | if (aa) continue; |
| 736 | |
| 737 | deliver_msglog("%s %s: children all complete\n", now, addr->address); |
| 738 | DEBUG(D_deliver) debug_printf("%s: children all complete\n", addr->address); |
| 739 | } |
| 740 | } |
| 741 | |
| 742 | |
| 743 | |
| 744 | /************************************************* |
| 745 | * Delivery logging support functions * |
| 746 | *************************************************/ |
| 747 | |
| 748 | /* The LOGGING() checks in d_log_interface() are complicated for backwards |
| 749 | compatibility. When outgoing interface logging was originally added, it was |
| 750 | conditional on just incoming_interface (which is off by default). The |
| 751 | outgoing_interface option is on by default to preserve this behaviour, but |
| 752 | you can enable incoming_interface and disable outgoing_interface to get I= |
| 753 | fields on incoming lines only. |
| 754 | |
| 755 | Arguments: |
| 756 | g The log line |
| 757 | addr The address to be logged |
| 758 | |
| 759 | Returns: New value for s |
| 760 | */ |
| 761 | |
| 762 | static gstring * |
| 763 | d_log_interface(gstring * g) |
| 764 | { |
| 765 | if (LOGGING(incoming_interface) && LOGGING(outgoing_interface) |
| 766 | && sending_ip_address) |
| 767 | { |
| 768 | g = string_fmt_append(g, " I=[%s]", sending_ip_address); |
| 769 | if (LOGGING(outgoing_port)) |
| 770 | g = string_fmt_append(g, ":%d", sending_port); |
| 771 | } |
| 772 | return g; |
| 773 | } |
| 774 | |
| 775 | |
| 776 | |
| 777 | static gstring * |
| 778 | d_hostlog(gstring * g, address_item * addr) |
| 779 | { |
| 780 | host_item * h = addr->host_used; |
| 781 | |
| 782 | g = string_append(g, 2, US" H=", h->name); |
| 783 | |
| 784 | if (LOGGING(dnssec) && h->dnssec == DS_YES) |
| 785 | g = string_catn(g, US" DS", 3); |
| 786 | |
| 787 | g = string_append(g, 3, US" [", h->address, US"]"); |
| 788 | |
| 789 | if (LOGGING(outgoing_port)) |
| 790 | g = string_fmt_append(g, ":%d", h->port); |
| 791 | |
| 792 | #ifdef SUPPORT_SOCKS |
| 793 | if (LOGGING(proxy) && proxy_local_address) |
| 794 | { |
| 795 | g = string_append(g, 3, US" PRX=[", proxy_local_address, US"]"); |
| 796 | if (LOGGING(outgoing_port)) |
| 797 | g = string_fmt_append(g, ":%d", proxy_local_port); |
| 798 | } |
| 799 | #endif |
| 800 | |
| 801 | g = d_log_interface(g); |
| 802 | |
| 803 | if (testflag(addr, af_tcp_fastopen)) |
| 804 | g = string_catn(g, US" TFO*", testflag(addr, af_tcp_fastopen_data) ? 5 : 4); |
| 805 | |
| 806 | return g; |
| 807 | } |
| 808 | |
| 809 | |
| 810 | |
| 811 | |
| 812 | |
| 813 | #ifndef DISABLE_TLS |
| 814 | static gstring * |
| 815 | d_tlslog(gstring * g, address_item * addr) |
| 816 | { |
| 817 | if (LOGGING(tls_cipher) && addr->cipher) |
| 818 | { |
| 819 | g = string_append(g, 2, US" X=", addr->cipher); |
| 820 | #ifdef EXPERIMENTAL_TLS_RESUME |
| 821 | if (LOGGING(tls_resumption) && testflag(addr, af_tls_resume)) |
| 822 | g = string_catn(g, US"*", 1); |
| 823 | #endif |
| 824 | } |
| 825 | if (LOGGING(tls_certificate_verified) && addr->cipher) |
| 826 | g = string_append(g, 2, US" CV=", |
| 827 | testflag(addr, af_cert_verified) |
| 828 | ? |
| 829 | #ifdef SUPPORT_DANE |
| 830 | testflag(addr, af_dane_verified) |
| 831 | ? "dane" |
| 832 | : |
| 833 | #endif |
| 834 | "yes" |
| 835 | : "no"); |
| 836 | if (LOGGING(tls_peerdn) && addr->peerdn) |
| 837 | g = string_append(g, 3, US" DN=\"", string_printing(addr->peerdn), US"\""); |
| 838 | return g; |
| 839 | } |
| 840 | #endif |
| 841 | |
| 842 | |
| 843 | |
| 844 | |
| 845 | #ifndef DISABLE_EVENT |
| 846 | uschar * |
| 847 | event_raise(uschar * action, const uschar * event, uschar * ev_data) |
| 848 | { |
| 849 | uschar * s; |
| 850 | if (action) |
| 851 | { |
| 852 | DEBUG(D_deliver) |
| 853 | debug_printf("Event(%s): event_action=|%s| delivery_IP=%s\n", |
| 854 | event, |
| 855 | action, deliver_host_address); |
| 856 | |
| 857 | event_name = event; |
| 858 | event_data = ev_data; |
| 859 | |
| 860 | if (!(s = expand_string(action)) && *expand_string_message) |
| 861 | log_write(0, LOG_MAIN|LOG_PANIC, |
| 862 | "failed to expand event_action %s in %s: %s\n", |
| 863 | event, transport_name ? transport_name : US"main", expand_string_message); |
| 864 | |
| 865 | event_name = event_data = NULL; |
| 866 | |
| 867 | /* If the expansion returns anything but an empty string, flag for |
| 868 | the caller to modify his normal processing |
| 869 | */ |
| 870 | if (s && *s) |
| 871 | { |
| 872 | DEBUG(D_deliver) |
| 873 | debug_printf("Event(%s): event_action returned \"%s\"\n", event, s); |
| 874 | errno = ERRNO_EVENT; |
| 875 | return s; |
| 876 | } |
| 877 | } |
| 878 | return NULL; |
| 879 | } |
| 880 | |
| 881 | void |
| 882 | msg_event_raise(const uschar * event, const address_item * addr) |
| 883 | { |
| 884 | const uschar * save_domain = deliver_domain; |
| 885 | uschar * save_local = deliver_localpart; |
| 886 | const uschar * save_host = deliver_host; |
| 887 | const uschar * save_address = deliver_host_address; |
| 888 | const int save_port = deliver_host_port; |
| 889 | |
| 890 | router_name = addr->router ? addr->router->name : NULL; |
| 891 | deliver_domain = addr->domain; |
| 892 | deliver_localpart = addr->local_part; |
| 893 | deliver_host = addr->host_used ? addr->host_used->name : NULL; |
| 894 | |
| 895 | if (!addr->transport) |
| 896 | { |
| 897 | if (Ustrcmp(event, "msg:fail:delivery") == 0) |
| 898 | { |
| 899 | /* An address failed with no transport involved. This happens when |
| 900 | a filter was used which triggered a fail command (in such a case |
| 901 | a transport isn't needed). Convert it to an internal fail event. */ |
| 902 | |
| 903 | (void) event_raise(event_action, US"msg:fail:internal", addr->message); |
| 904 | } |
| 905 | } |
| 906 | else |
| 907 | { |
| 908 | transport_name = addr->transport->name; |
| 909 | |
| 910 | (void) event_raise(addr->transport->event_action, event, |
| 911 | addr->host_used |
| 912 | || Ustrcmp(addr->transport->driver_name, "smtp") == 0 |
| 913 | || Ustrcmp(addr->transport->driver_name, "lmtp") == 0 |
| 914 | || Ustrcmp(addr->transport->driver_name, "autoreply") == 0 |
| 915 | ? addr->message : NULL); |
| 916 | } |
| 917 | |
| 918 | deliver_host_port = save_port; |
| 919 | deliver_host_address = save_address; |
| 920 | deliver_host = save_host; |
| 921 | deliver_localpart = save_local; |
| 922 | deliver_domain = save_domain; |
| 923 | router_name = transport_name = NULL; |
| 924 | } |
| 925 | #endif /*DISABLE_EVENT*/ |
| 926 | |
| 927 | |
| 928 | |
| 929 | /******************************************************************************/ |
| 930 | |
| 931 | |
| 932 | /************************************************* |
| 933 | * Generate local prt for logging * |
| 934 | *************************************************/ |
| 935 | |
| 936 | /* This function is a subroutine for use in string_log_address() below. |
| 937 | |
| 938 | Arguments: |
| 939 | addr the address being logged |
| 940 | yield the current dynamic buffer pointer |
| 941 | |
| 942 | Returns: the new value of the buffer pointer |
| 943 | */ |
| 944 | |
| 945 | static gstring * |
| 946 | string_get_localpart(address_item * addr, gstring * yield) |
| 947 | { |
| 948 | uschar * s; |
| 949 | |
| 950 | s = addr->prefix; |
| 951 | if (testflag(addr, af_include_affixes) && s) |
| 952 | { |
| 953 | #ifdef SUPPORT_I18N |
| 954 | if (testflag(addr, af_utf8_downcvt)) |
| 955 | s = string_localpart_utf8_to_alabel(s, NULL); |
| 956 | #endif |
| 957 | yield = string_cat(yield, s); |
| 958 | } |
| 959 | |
| 960 | s = addr->local_part; |
| 961 | #ifdef SUPPORT_I18N |
| 962 | if (testflag(addr, af_utf8_downcvt)) |
| 963 | s = string_localpart_utf8_to_alabel(s, NULL); |
| 964 | #endif |
| 965 | yield = string_cat(yield, s); |
| 966 | |
| 967 | s = addr->suffix; |
| 968 | if (testflag(addr, af_include_affixes) && s) |
| 969 | { |
| 970 | #ifdef SUPPORT_I18N |
| 971 | if (testflag(addr, af_utf8_downcvt)) |
| 972 | s = string_localpart_utf8_to_alabel(s, NULL); |
| 973 | #endif |
| 974 | yield = string_cat(yield, s); |
| 975 | } |
| 976 | |
| 977 | return yield; |
| 978 | } |
| 979 | |
| 980 | |
| 981 | /************************************************* |
| 982 | * Generate log address list * |
| 983 | *************************************************/ |
| 984 | |
| 985 | /* This function generates a list consisting of an address and its parents, for |
| 986 | use in logging lines. For saved onetime aliased addresses, the onetime parent |
| 987 | field is used. If the address was delivered by a transport with rcpt_include_ |
| 988 | affixes set, the af_include_affixes bit will be set in the address. In that |
| 989 | case, we include the affixes here too. |
| 990 | |
| 991 | Arguments: |
| 992 | g points to growing-string struct |
| 993 | addr bottom (ultimate) address |
| 994 | all_parents if TRUE, include all parents |
| 995 | success TRUE for successful delivery |
| 996 | |
| 997 | Returns: a growable string in dynamic store |
| 998 | */ |
| 999 | |
| 1000 | static gstring * |
| 1001 | string_log_address(gstring * g, |
| 1002 | address_item *addr, BOOL all_parents, BOOL success) |
| 1003 | { |
| 1004 | BOOL add_topaddr = TRUE; |
| 1005 | address_item *topaddr; |
| 1006 | |
| 1007 | /* Find the ultimate parent */ |
| 1008 | |
| 1009 | for (topaddr = addr; topaddr->parent; topaddr = topaddr->parent) ; |
| 1010 | |
| 1011 | /* We start with just the local part for pipe, file, and reply deliveries, and |
| 1012 | for successful local deliveries from routers that have the log_as_local flag |
| 1013 | set. File deliveries from filters can be specified as non-absolute paths in |
| 1014 | cases where the transport is going to complete the path. If there is an error |
| 1015 | before this happens (expansion failure) the local part will not be updated, and |
| 1016 | so won't necessarily look like a path. Add extra text for this case. */ |
| 1017 | |
| 1018 | if ( testflag(addr, af_pfr) |
| 1019 | || ( success |
| 1020 | && addr->router && addr->router->log_as_local |
| 1021 | && addr->transport && addr->transport->info->local |
| 1022 | ) ) |
| 1023 | { |
| 1024 | if (testflag(addr, af_file) && addr->local_part[0] != '/') |
| 1025 | g = string_catn(g, CUS"save ", 5); |
| 1026 | g = string_get_localpart(addr, g); |
| 1027 | } |
| 1028 | |
| 1029 | /* Other deliveries start with the full address. It we have split it into local |
| 1030 | part and domain, use those fields. Some early failures can happen before the |
| 1031 | splitting is done; in those cases use the original field. */ |
| 1032 | |
| 1033 | else |
| 1034 | { |
| 1035 | uschar * cmp; |
| 1036 | int off = g->ptr; /* start of the "full address" */ |
| 1037 | |
| 1038 | if (addr->local_part) |
| 1039 | { |
| 1040 | const uschar * s; |
| 1041 | g = string_get_localpart(addr, g); |
| 1042 | g = string_catn(g, US"@", 1); |
| 1043 | s = addr->domain; |
| 1044 | #ifdef SUPPORT_I18N |
| 1045 | if (testflag(addr, af_utf8_downcvt)) |
| 1046 | s = string_localpart_utf8_to_alabel(s, NULL); |
| 1047 | #endif |
| 1048 | g = string_cat(g, s); |
| 1049 | } |
| 1050 | else |
| 1051 | g = string_cat(g, addr->address); |
| 1052 | |
| 1053 | /* If the address we are going to print is the same as the top address, |
| 1054 | and all parents are not being included, don't add on the top address. First |
| 1055 | of all, do a caseless comparison; if this succeeds, do a caseful comparison |
| 1056 | on the local parts. */ |
| 1057 | |
| 1058 | cmp = g->s + off; /* only now, as rebuffer likely done */ |
| 1059 | string_from_gstring(g); /* ensure nul-terminated */ |
| 1060 | if ( strcmpic(cmp, topaddr->address) == 0 |
| 1061 | && Ustrncmp(cmp, topaddr->address, Ustrchr(cmp, '@') - cmp) == 0 |
| 1062 | && !addr->onetime_parent |
| 1063 | && (!all_parents || !addr->parent || addr->parent == topaddr) |
| 1064 | ) |
| 1065 | add_topaddr = FALSE; |
| 1066 | } |
| 1067 | |
| 1068 | /* If all parents are requested, or this is a local pipe/file/reply, and |
| 1069 | there is at least one intermediate parent, show it in brackets, and continue |
| 1070 | with all of them if all are wanted. */ |
| 1071 | |
| 1072 | if ( (all_parents || testflag(addr, af_pfr)) |
| 1073 | && addr->parent |
| 1074 | && addr->parent != topaddr) |
| 1075 | { |
| 1076 | uschar *s = US" ("; |
| 1077 | for (address_item * addr2 = addr->parent; addr2 != topaddr; addr2 = addr2->parent) |
| 1078 | { |
| 1079 | g = string_catn(g, s, 2); |
| 1080 | g = string_cat (g, addr2->address); |
| 1081 | if (!all_parents) break; |
| 1082 | s = US", "; |
| 1083 | } |
| 1084 | g = string_catn(g, US")", 1); |
| 1085 | } |
| 1086 | |
| 1087 | /* Add the top address if it is required */ |
| 1088 | |
| 1089 | if (add_topaddr) |
| 1090 | g = string_append(g, 3, |
| 1091 | US" <", |
| 1092 | addr->onetime_parent ? addr->onetime_parent : topaddr->address, |
| 1093 | US">"); |
| 1094 | |
| 1095 | return g; |
| 1096 | } |
| 1097 | |
| 1098 | |
| 1099 | |
| 1100 | /******************************************************************************/ |
| 1101 | |
| 1102 | |
| 1103 | |
| 1104 | /* If msg is NULL this is a delivery log and logchar is used. Otherwise |
| 1105 | this is a nonstandard call; no two-character delivery flag is written |
| 1106 | but sender-host and sender are prefixed and "msg" is inserted in the log line. |
| 1107 | |
| 1108 | Arguments: |
| 1109 | flags passed to log_write() |
| 1110 | */ |
| 1111 | void |
| 1112 | delivery_log(int flags, address_item * addr, int logchar, uschar * msg) |
| 1113 | { |
| 1114 | gstring * g; /* Used for a temporary, expanding buffer, for building log lines */ |
| 1115 | rmark reset_point; |
| 1116 | |
| 1117 | /* Log the delivery on the main log. We use an extensible string to build up |
| 1118 | the log line, and reset the store afterwards. Remote deliveries should always |
| 1119 | have a pointer to the host item that succeeded; local deliveries can have a |
| 1120 | pointer to a single host item in their host list, for use by the transport. */ |
| 1121 | |
| 1122 | #ifndef DISABLE_EVENT |
| 1123 | /* presume no successful remote delivery */ |
| 1124 | lookup_dnssec_authenticated = NULL; |
| 1125 | #endif |
| 1126 | |
| 1127 | reset_point = store_mark(); |
| 1128 | g = string_get_tainted(256, TRUE); /* addrs will be tainted, so avoid copy */ |
| 1129 | |
| 1130 | if (msg) |
| 1131 | g = string_append(g, 2, host_and_ident(TRUE), US" "); |
| 1132 | else |
| 1133 | { |
| 1134 | g->s[0] = logchar; g->ptr = 1; |
| 1135 | g = string_catn(g, US"> ", 2); |
| 1136 | } |
| 1137 | g = string_log_address(g, addr, LOGGING(all_parents), TRUE); |
| 1138 | |
| 1139 | if (LOGGING(sender_on_delivery) || msg) |
| 1140 | g = string_append(g, 3, US" F=<", |
| 1141 | #ifdef SUPPORT_I18N |
| 1142 | testflag(addr, af_utf8_downcvt) |
| 1143 | ? string_address_utf8_to_alabel(sender_address, NULL) |
| 1144 | : |
| 1145 | #endif |
| 1146 | sender_address, |
| 1147 | US">"); |
| 1148 | |
| 1149 | if (*queue_name) |
| 1150 | g = string_append(g, 2, US" Q=", queue_name); |
| 1151 | |
| 1152 | #ifdef EXPERIMENTAL_SRS |
| 1153 | if(addr->prop.srs_sender) |
| 1154 | g = string_append(g, 3, US" SRS=<", addr->prop.srs_sender, US">"); |
| 1155 | #endif |
| 1156 | |
| 1157 | /* You might think that the return path must always be set for a successful |
| 1158 | delivery; indeed, I did for some time, until this statement crashed. The case |
| 1159 | when it is not set is for a delivery to /dev/null which is optimised by not |
| 1160 | being run at all. */ |
| 1161 | |
| 1162 | if (used_return_path && LOGGING(return_path_on_delivery)) |
| 1163 | g = string_append(g, 3, US" P=<", used_return_path, US">"); |
| 1164 | |
| 1165 | if (msg) |
| 1166 | g = string_append(g, 2, US" ", msg); |
| 1167 | |
| 1168 | /* For a delivery from a system filter, there may not be a router */ |
| 1169 | if (addr->router) |
| 1170 | g = string_append(g, 2, US" R=", addr->router->name); |
| 1171 | |
| 1172 | g = string_append(g, 2, US" T=", addr->transport->name); |
| 1173 | |
| 1174 | if (LOGGING(delivery_size)) |
| 1175 | g = string_fmt_append(g, " S=%d", transport_count); |
| 1176 | |
| 1177 | /* Local delivery */ |
| 1178 | |
| 1179 | if (addr->transport->info->local) |
| 1180 | { |
| 1181 | if (addr->host_list) |
| 1182 | g = string_append(g, 2, US" H=", addr->host_list->name); |
| 1183 | g = d_log_interface(g); |
| 1184 | if (addr->shadow_message) |
| 1185 | g = string_cat(g, addr->shadow_message); |
| 1186 | } |
| 1187 | |
| 1188 | /* Remote delivery */ |
| 1189 | |
| 1190 | else |
| 1191 | { |
| 1192 | if (addr->host_used) |
| 1193 | { |
| 1194 | g = d_hostlog(g, addr); |
| 1195 | if (continue_sequence > 1) |
| 1196 | g = string_catn(g, US"*", 1); |
| 1197 | |
| 1198 | #ifndef DISABLE_EVENT |
| 1199 | deliver_host_address = addr->host_used->address; |
| 1200 | deliver_host_port = addr->host_used->port; |
| 1201 | deliver_host = addr->host_used->name; |
| 1202 | |
| 1203 | /* DNS lookup status */ |
| 1204 | lookup_dnssec_authenticated = addr->host_used->dnssec==DS_YES ? US"yes" |
| 1205 | : addr->host_used->dnssec==DS_NO ? US"no" |
| 1206 | : NULL; |
| 1207 | #endif |
| 1208 | } |
| 1209 | |
| 1210 | #ifndef DISABLE_TLS |
| 1211 | g = d_tlslog(g, addr); |
| 1212 | #endif |
| 1213 | |
| 1214 | if (addr->authenticator) |
| 1215 | { |
| 1216 | g = string_append(g, 2, US" A=", addr->authenticator); |
| 1217 | if (addr->auth_id) |
| 1218 | { |
| 1219 | g = string_append(g, 2, US":", addr->auth_id); |
| 1220 | if (LOGGING(smtp_mailauth) && addr->auth_sndr) |
| 1221 | g = string_append(g, 2, US":", addr->auth_sndr); |
| 1222 | } |
| 1223 | } |
| 1224 | |
| 1225 | if (LOGGING(pipelining)) |
| 1226 | { |
| 1227 | if (testflag(addr, af_pipelining)) |
| 1228 | g = string_catn(g, US" L", 2); |
| 1229 | #ifndef DISABLE_PIPE_CONNECT |
| 1230 | if (testflag(addr, af_early_pipe)) |
| 1231 | g = string_catn(g, US"*", 1); |
| 1232 | #endif |
| 1233 | } |
| 1234 | |
| 1235 | #ifndef DISABLE_PRDR |
| 1236 | if (testflag(addr, af_prdr_used)) |
| 1237 | g = string_catn(g, US" PRDR", 5); |
| 1238 | #endif |
| 1239 | |
| 1240 | if (testflag(addr, af_chunking_used)) |
| 1241 | g = string_catn(g, US" K", 2); |
| 1242 | } |
| 1243 | |
| 1244 | /* confirmation message (SMTP (host_used) and LMTP (driver_name)) */ |
| 1245 | |
| 1246 | if ( LOGGING(smtp_confirmation) |
| 1247 | && addr->message |
| 1248 | && (addr->host_used || Ustrcmp(addr->transport->driver_name, "lmtp") == 0) |
| 1249 | ) |
| 1250 | { |
| 1251 | unsigned lim = big_buffer_size < 1024 ? big_buffer_size : 1024; |
| 1252 | uschar *p = big_buffer; |
| 1253 | uschar *ss = addr->message; |
| 1254 | *p++ = '\"'; |
| 1255 | for (int i = 0; i < lim && ss[i] != 0; i++) /* limit logged amount */ |
| 1256 | { |
| 1257 | if (ss[i] == '\"' || ss[i] == '\\') *p++ = '\\'; /* quote \ and " */ |
| 1258 | *p++ = ss[i]; |
| 1259 | } |
| 1260 | *p++ = '\"'; |
| 1261 | *p = 0; |
| 1262 | g = string_append(g, 2, US" C=", big_buffer); |
| 1263 | } |
| 1264 | |
| 1265 | /* Time on queue and actual time taken to deliver */ |
| 1266 | |
| 1267 | if (LOGGING(queue_time)) |
| 1268 | g = string_append(g, 2, US" QT=", |
| 1269 | string_timesince(&received_time)); |
| 1270 | |
| 1271 | if (LOGGING(deliver_time)) |
| 1272 | g = string_append(g, 2, US" DT=", string_timediff(&addr->delivery_time)); |
| 1273 | |
| 1274 | /* string_cat() always leaves room for the terminator. Release the |
| 1275 | store we used to build the line after writing it. */ |
| 1276 | |
| 1277 | log_write(0, flags, "%s", string_from_gstring(g)); |
| 1278 | |
| 1279 | #ifndef DISABLE_EVENT |
| 1280 | if (!msg) msg_event_raise(US"msg:delivery", addr); |
| 1281 | #endif |
| 1282 | |
| 1283 | store_reset(reset_point); |
| 1284 | return; |
| 1285 | } |
| 1286 | |
| 1287 | |
| 1288 | |
| 1289 | static void |
| 1290 | deferral_log(address_item * addr, uschar * now, |
| 1291 | int logflags, uschar * driver_name, uschar * driver_kind) |
| 1292 | { |
| 1293 | rmark reset_point = store_mark(); |
| 1294 | gstring * g = string_get(256); |
| 1295 | |
| 1296 | /* Build up the line that is used for both the message log and the main |
| 1297 | log. */ |
| 1298 | |
| 1299 | /* Create the address string for logging. Must not do this earlier, because |
| 1300 | an OK result may be changed to FAIL when a pipe returns text. */ |
| 1301 | |
| 1302 | g = string_log_address(g, addr, LOGGING(all_parents), FALSE); |
| 1303 | |
| 1304 | if (*queue_name) |
| 1305 | g = string_append(g, 2, US" Q=", queue_name); |
| 1306 | |
| 1307 | /* Either driver_name contains something and driver_kind contains |
| 1308 | " router" or " transport" (note the leading space), or driver_name is |
| 1309 | a null string and driver_kind contains "routing" without the leading |
| 1310 | space, if all routing has been deferred. When a domain has been held, |
| 1311 | so nothing has been done at all, both variables contain null strings. */ |
| 1312 | |
| 1313 | if (driver_name) |
| 1314 | { |
| 1315 | if (driver_kind[1] == 't' && addr->router) |
| 1316 | g = string_append(g, 2, US" R=", addr->router->name); |
| 1317 | g = string_fmt_append(g, " %c=%s", toupper(driver_kind[1]), driver_name); |
| 1318 | } |
| 1319 | else if (driver_kind) |
| 1320 | g = string_append(g, 2, US" ", driver_kind); |
| 1321 | |
| 1322 | g = string_fmt_append(g, " defer (%d)", addr->basic_errno); |
| 1323 | |
| 1324 | if (addr->basic_errno > 0) |
| 1325 | g = string_append(g, 2, US": ", |
| 1326 | US strerror(addr->basic_errno)); |
| 1327 | |
| 1328 | if (addr->host_used) |
| 1329 | { |
| 1330 | g = string_append(g, 5, |
| 1331 | US" H=", addr->host_used->name, |
| 1332 | US" [", addr->host_used->address, US"]"); |
| 1333 | if (LOGGING(outgoing_port)) |
| 1334 | { |
| 1335 | int port = addr->host_used->port; |
| 1336 | g = string_fmt_append(g, ":%d", port == PORT_NONE ? 25 : port); |
| 1337 | } |
| 1338 | } |
| 1339 | |
| 1340 | if (LOGGING(deliver_time)) |
| 1341 | g = string_append(g, 2, US" DT=", string_timediff(&addr->delivery_time)); |
| 1342 | |
| 1343 | if (addr->message) |
| 1344 | g = string_append(g, 2, US": ", addr->message); |
| 1345 | |
| 1346 | (void) string_from_gstring(g); |
| 1347 | |
| 1348 | /* Log the deferment in the message log, but don't clutter it |
| 1349 | up with retry-time defers after the first delivery attempt. */ |
| 1350 | |
| 1351 | if (f.deliver_firsttime || addr->basic_errno > ERRNO_RETRY_BASE) |
| 1352 | deliver_msglog("%s %s\n", now, g->s); |
| 1353 | |
| 1354 | /* Write the main log and reset the store. |
| 1355 | For errors of the type "retry time not reached" (also remotes skipped |
| 1356 | on queue run), logging is controlled by L_retry_defer. Note that this kind |
| 1357 | of error number is negative, and all the retry ones are less than any |
| 1358 | others. */ |
| 1359 | |
| 1360 | |
| 1361 | log_write(addr->basic_errno <= ERRNO_RETRY_BASE ? L_retry_defer : 0, logflags, |
| 1362 | "== %s", g->s); |
| 1363 | |
| 1364 | store_reset(reset_point); |
| 1365 | return; |
| 1366 | } |
| 1367 | |
| 1368 | |
| 1369 | |
| 1370 | static void |
| 1371 | failure_log(address_item * addr, uschar * driver_kind, uschar * now) |
| 1372 | { |
| 1373 | rmark reset_point = store_mark(); |
| 1374 | gstring * g = string_get(256); |
| 1375 | |
| 1376 | #ifndef DISABLE_EVENT |
| 1377 | /* Message failures for which we will send a DSN get their event raised |
| 1378 | later so avoid doing it here. */ |
| 1379 | |
| 1380 | if ( !addr->prop.ignore_error |
| 1381 | && !(addr->dsn_flags & (rf_dsnflags & ~rf_notify_failure)) |
| 1382 | ) |
| 1383 | msg_event_raise(US"msg:fail:delivery", addr); |
| 1384 | #endif |
| 1385 | |
| 1386 | /* Build up the log line for the message and main logs */ |
| 1387 | |
| 1388 | /* Create the address string for logging. Must not do this earlier, because |
| 1389 | an OK result may be changed to FAIL when a pipe returns text. */ |
| 1390 | |
| 1391 | g = string_log_address(g, addr, LOGGING(all_parents), FALSE); |
| 1392 | |
| 1393 | if (LOGGING(sender_on_delivery)) |
| 1394 | g = string_append(g, 3, US" F=<", sender_address, US">"); |
| 1395 | |
| 1396 | if (*queue_name) |
| 1397 | g = string_append(g, 2, US" Q=", queue_name); |
| 1398 | |
| 1399 | /* Return path may not be set if no delivery actually happened */ |
| 1400 | |
| 1401 | if (used_return_path && LOGGING(return_path_on_delivery)) |
| 1402 | g = string_append(g, 3, US" P=<", used_return_path, US">"); |
| 1403 | |
| 1404 | if (addr->router) |
| 1405 | g = string_append(g, 2, US" R=", addr->router->name); |
| 1406 | if (addr->transport) |
| 1407 | g = string_append(g, 2, US" T=", addr->transport->name); |
| 1408 | |
| 1409 | if (addr->host_used) |
| 1410 | g = d_hostlog(g, addr); |
| 1411 | |
| 1412 | #ifndef DISABLE_TLS |
| 1413 | g = d_tlslog(g, addr); |
| 1414 | #endif |
| 1415 | |
| 1416 | if (addr->basic_errno > 0) |
| 1417 | g = string_append(g, 2, US": ", US strerror(addr->basic_errno)); |
| 1418 | |
| 1419 | if (addr->message) |
| 1420 | g = string_append(g, 2, US": ", addr->message); |
| 1421 | |
| 1422 | if (LOGGING(deliver_time)) |
| 1423 | g = string_append(g, 2, US" DT=", string_timediff(&addr->delivery_time)); |
| 1424 | |
| 1425 | (void) string_from_gstring(g); |
| 1426 | |
| 1427 | /* Do the logging. For the message log, "routing failed" for those cases, |
| 1428 | just to make it clearer. */ |
| 1429 | |
| 1430 | if (driver_kind) |
| 1431 | deliver_msglog("%s %s failed for %s\n", now, driver_kind, g->s); |
| 1432 | else |
| 1433 | deliver_msglog("%s %s\n", now, g->s); |
| 1434 | |
| 1435 | log_write(0, LOG_MAIN, "** %s", g->s); |
| 1436 | |
| 1437 | store_reset(reset_point); |
| 1438 | return; |
| 1439 | } |
| 1440 | |
| 1441 | |
| 1442 | |
| 1443 | /************************************************* |
| 1444 | * Actions at the end of handling an address * |
| 1445 | *************************************************/ |
| 1446 | |
| 1447 | /* This is a function for processing a single address when all that can be done |
| 1448 | with it has been done. |
| 1449 | |
| 1450 | Arguments: |
| 1451 | addr points to the address block |
| 1452 | result the result of the delivery attempt |
| 1453 | logflags flags for log_write() (LOG_MAIN and/or LOG_PANIC) |
| 1454 | driver_type indicates which type of driver (transport, or router) was last |
| 1455 | to process the address |
| 1456 | logchar '=' or '-' for use when logging deliveries with => or -> |
| 1457 | |
| 1458 | Returns: nothing |
| 1459 | */ |
| 1460 | |
| 1461 | static void |
| 1462 | post_process_one(address_item *addr, int result, int logflags, int driver_type, |
| 1463 | int logchar) |
| 1464 | { |
| 1465 | uschar *now = tod_stamp(tod_log); |
| 1466 | uschar *driver_kind = NULL; |
| 1467 | uschar *driver_name = NULL; |
| 1468 | |
| 1469 | DEBUG(D_deliver) debug_printf("post-process %s (%d)\n", addr->address, result); |
| 1470 | |
| 1471 | /* Set up driver kind and name for logging. Disable logging if the router or |
| 1472 | transport has disabled it. */ |
| 1473 | |
| 1474 | if (driver_type == EXIM_DTYPE_TRANSPORT) |
| 1475 | { |
| 1476 | if (addr->transport) |
| 1477 | { |
| 1478 | driver_name = addr->transport->name; |
| 1479 | driver_kind = US" transport"; |
| 1480 | f.disable_logging = addr->transport->disable_logging; |
| 1481 | } |
| 1482 | else driver_kind = US"transporting"; |
| 1483 | } |
| 1484 | else if (driver_type == EXIM_DTYPE_ROUTER) |
| 1485 | { |
| 1486 | if (addr->router) |
| 1487 | { |
| 1488 | driver_name = addr->router->name; |
| 1489 | driver_kind = US" router"; |
| 1490 | f.disable_logging = addr->router->disable_logging; |
| 1491 | } |
| 1492 | else driver_kind = US"routing"; |
| 1493 | } |
| 1494 | |
| 1495 | /* If there's an error message set, ensure that it contains only printing |
| 1496 | characters - it should, but occasionally things slip in and this at least |
| 1497 | stops the log format from getting wrecked. We also scan the message for an LDAP |
| 1498 | expansion item that has a password setting, and flatten the password. This is a |
| 1499 | fudge, but I don't know a cleaner way of doing this. (If the item is badly |
| 1500 | malformed, it won't ever have gone near LDAP.) */ |
| 1501 | |
| 1502 | if (addr->message) |
| 1503 | { |
| 1504 | const uschar * s = string_printing(addr->message); |
| 1505 | |
| 1506 | /* deconst cast ok as string_printing known to have alloc'n'copied */ |
| 1507 | addr->message = expand_hide_passwords(US s); |
| 1508 | } |
| 1509 | |
| 1510 | /* If we used a transport that has one of the "return_output" options set, and |
| 1511 | if it did in fact generate some output, then for return_output we treat the |
| 1512 | message as failed if it was not already set that way, so that the output gets |
| 1513 | returned to the sender, provided there is a sender to send it to. For |
| 1514 | return_fail_output, do this only if the delivery failed. Otherwise we just |
| 1515 | unlink the file, and remove the name so that if the delivery failed, we don't |
| 1516 | try to send back an empty or unwanted file. The log_output options operate only |
| 1517 | on a non-empty file. |
| 1518 | |
| 1519 | In any case, we close the message file, because we cannot afford to leave a |
| 1520 | file-descriptor for one address while processing (maybe very many) others. */ |
| 1521 | |
| 1522 | if (addr->return_file >= 0 && addr->return_filename) |
| 1523 | { |
| 1524 | BOOL return_output = FALSE; |
| 1525 | struct stat statbuf; |
| 1526 | (void)EXIMfsync(addr->return_file); |
| 1527 | |
| 1528 | /* If there is no output, do nothing. */ |
| 1529 | |
| 1530 | if (fstat(addr->return_file, &statbuf) == 0 && statbuf.st_size > 0) |
| 1531 | { |
| 1532 | transport_instance *tb = addr->transport; |
| 1533 | |
| 1534 | /* Handle logging options */ |
| 1535 | |
| 1536 | if ( tb->log_output |
| 1537 | || result == FAIL && tb->log_fail_output |
| 1538 | || result == DEFER && tb->log_defer_output |
| 1539 | ) |
| 1540 | { |
| 1541 | uschar *s; |
| 1542 | FILE *f = Ufopen(addr->return_filename, "rb"); |
| 1543 | if (!f) |
| 1544 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to open %s to log output " |
| 1545 | "from %s transport: %s", addr->return_filename, tb->name, |
| 1546 | strerror(errno)); |
| 1547 | else |
| 1548 | if ((s = US Ufgets(big_buffer, big_buffer_size, f))) |
| 1549 | { |
| 1550 | uschar *p = big_buffer + Ustrlen(big_buffer); |
| 1551 | const uschar * sp; |
| 1552 | while (p > big_buffer && isspace(p[-1])) p--; |
| 1553 | *p = 0; |
| 1554 | sp = string_printing(big_buffer); |
| 1555 | log_write(0, LOG_MAIN, "<%s>: %s transport output: %s", |
| 1556 | addr->address, tb->name, sp); |
| 1557 | } |
| 1558 | (void)fclose(f); |
| 1559 | } |
| 1560 | |
| 1561 | /* Handle returning options, but only if there is an address to return |
| 1562 | the text to. */ |
| 1563 | |
| 1564 | if (sender_address[0] != 0 || addr->prop.errors_address) |
| 1565 | if (tb->return_output) |
| 1566 | { |
| 1567 | addr->transport_return = result = FAIL; |
| 1568 | if (addr->basic_errno == 0 && !addr->message) |
| 1569 | addr->message = US"return message generated"; |
| 1570 | return_output = TRUE; |
| 1571 | } |
| 1572 | else |
| 1573 | if (tb->return_fail_output && result == FAIL) return_output = TRUE; |
| 1574 | } |
| 1575 | |
| 1576 | /* Get rid of the file unless it might be returned, but close it in |
| 1577 | all cases. */ |
| 1578 | |
| 1579 | if (!return_output) |
| 1580 | { |
| 1581 | Uunlink(addr->return_filename); |
| 1582 | addr->return_filename = NULL; |
| 1583 | addr->return_file = -1; |
| 1584 | } |
| 1585 | |
| 1586 | (void)close(addr->return_file); |
| 1587 | } |
| 1588 | |
| 1589 | /* The success case happens only after delivery by a transport. */ |
| 1590 | |
| 1591 | if (result == OK) |
| 1592 | { |
| 1593 | addr->next = addr_succeed; |
| 1594 | addr_succeed = addr; |
| 1595 | |
| 1596 | /* Call address_done() to ensure that we don't deliver to this address again, |
| 1597 | and write appropriate things to the message log. If it is a child address, we |
| 1598 | call child_done() to scan the ancestors and mark them complete if this is the |
| 1599 | last child to complete. */ |
| 1600 | |
| 1601 | address_done(addr, now); |
| 1602 | DEBUG(D_deliver) debug_printf("%s delivered\n", addr->address); |
| 1603 | |
| 1604 | if (!addr->parent) |
| 1605 | deliver_msglog("%s %s: %s%s succeeded\n", now, addr->address, |
| 1606 | driver_name, driver_kind); |
| 1607 | else |
| 1608 | { |
| 1609 | deliver_msglog("%s %s <%s>: %s%s succeeded\n", now, addr->address, |
| 1610 | addr->parent->address, driver_name, driver_kind); |
| 1611 | child_done(addr, now); |
| 1612 | } |
| 1613 | |
| 1614 | /* Certificates for logging (via events) */ |
| 1615 | #ifndef DISABLE_TLS |
| 1616 | tls_out.ourcert = addr->ourcert; |
| 1617 | addr->ourcert = NULL; |
| 1618 | tls_out.peercert = addr->peercert; |
| 1619 | addr->peercert = NULL; |
| 1620 | |
| 1621 | tls_out.ver = addr->tlsver; |
| 1622 | tls_out.cipher = addr->cipher; |
| 1623 | tls_out.peerdn = addr->peerdn; |
| 1624 | tls_out.ocsp = addr->ocsp; |
| 1625 | # ifdef SUPPORT_DANE |
| 1626 | tls_out.dane_verified = testflag(addr, af_dane_verified); |
| 1627 | # endif |
| 1628 | #endif |
| 1629 | |
| 1630 | delivery_log(LOG_MAIN, addr, logchar, NULL); |
| 1631 | |
| 1632 | #ifndef DISABLE_TLS |
| 1633 | tls_free_cert(&tls_out.ourcert); |
| 1634 | tls_free_cert(&tls_out.peercert); |
| 1635 | tls_out.ver = NULL; |
| 1636 | tls_out.cipher = NULL; |
| 1637 | tls_out.peerdn = NULL; |
| 1638 | tls_out.ocsp = OCSP_NOT_REQ; |
| 1639 | # ifdef SUPPORT_DANE |
| 1640 | tls_out.dane_verified = FALSE; |
| 1641 | # endif |
| 1642 | #endif |
| 1643 | } |
| 1644 | |
| 1645 | |
| 1646 | /* Soft failure, or local delivery process failed; freezing may be |
| 1647 | requested. */ |
| 1648 | |
| 1649 | else if (result == DEFER || result == PANIC) |
| 1650 | { |
| 1651 | if (result == PANIC) logflags |= LOG_PANIC; |
| 1652 | |
| 1653 | /* This puts them on the chain in reverse order. Do not change this, because |
| 1654 | the code for handling retries assumes that the one with the retry |
| 1655 | information is last. */ |
| 1656 | |
| 1657 | addr->next = addr_defer; |
| 1658 | addr_defer = addr; |
| 1659 | |
| 1660 | /* The only currently implemented special action is to freeze the |
| 1661 | message. Logging of this is done later, just before the -H file is |
| 1662 | updated. */ |
| 1663 | |
| 1664 | if (addr->special_action == SPECIAL_FREEZE) |
| 1665 | { |
| 1666 | f.deliver_freeze = TRUE; |
| 1667 | deliver_frozen_at = time(NULL); |
| 1668 | update_spool = TRUE; |
| 1669 | } |
| 1670 | |
| 1671 | /* If doing a 2-stage queue run, we skip writing to either the message |
| 1672 | log or the main log for SMTP defers. */ |
| 1673 | |
| 1674 | if (!f.queue_2stage || addr->basic_errno != 0) |
| 1675 | deferral_log(addr, now, logflags, driver_name, driver_kind); |
| 1676 | } |
| 1677 | |
| 1678 | |
| 1679 | /* Hard failure. If there is an address to which an error message can be sent, |
| 1680 | put this address on the failed list. If not, put it on the deferred list and |
| 1681 | freeze the mail message for human attention. The latter action can also be |
| 1682 | explicitly requested by a router or transport. */ |
| 1683 | |
| 1684 | else |
| 1685 | { |
| 1686 | /* If this is a delivery error, or a message for which no replies are |
| 1687 | wanted, and the message's age is greater than ignore_bounce_errors_after, |
| 1688 | force the af_ignore_error flag. This will cause the address to be discarded |
| 1689 | later (with a log entry). */ |
| 1690 | |
| 1691 | if (!*sender_address && message_age >= ignore_bounce_errors_after) |
| 1692 | addr->prop.ignore_error = TRUE; |
| 1693 | |
| 1694 | /* Freeze the message if requested, or if this is a bounce message (or other |
| 1695 | message with null sender) and this address does not have its own errors |
| 1696 | address. However, don't freeze if errors are being ignored. The actual code |
| 1697 | to ignore occurs later, instead of sending a message. Logging of freezing |
| 1698 | occurs later, just before writing the -H file. */ |
| 1699 | |
| 1700 | if ( !addr->prop.ignore_error |
| 1701 | && ( addr->special_action == SPECIAL_FREEZE |
| 1702 | || (sender_address[0] == 0 && !addr->prop.errors_address) |
| 1703 | ) ) |
| 1704 | { |
| 1705 | frozen_info = addr->special_action == SPECIAL_FREEZE |
| 1706 | ? US"" |
| 1707 | : f.sender_local && !f.local_error_message |
| 1708 | ? US" (message created with -f <>)" |
| 1709 | : US" (delivery error message)"; |
| 1710 | f.deliver_freeze = TRUE; |
| 1711 | deliver_frozen_at = time(NULL); |
| 1712 | update_spool = TRUE; |
| 1713 | |
| 1714 | /* The address is put on the defer rather than the failed queue, because |
| 1715 | the message is being retained. */ |
| 1716 | |
| 1717 | addr->next = addr_defer; |
| 1718 | addr_defer = addr; |
| 1719 | } |
| 1720 | |
| 1721 | /* Don't put the address on the nonrecipients tree yet; wait until an |
| 1722 | error message has been successfully sent. */ |
| 1723 | |
| 1724 | else |
| 1725 | { |
| 1726 | addr->next = addr_failed; |
| 1727 | addr_failed = addr; |
| 1728 | } |
| 1729 | |
| 1730 | failure_log(addr, driver_name ? NULL : driver_kind, now); |
| 1731 | } |
| 1732 | |
| 1733 | /* Ensure logging is turned on again in all cases */ |
| 1734 | |
| 1735 | f.disable_logging = FALSE; |
| 1736 | } |
| 1737 | |
| 1738 | |
| 1739 | |
| 1740 | |
| 1741 | /************************************************* |
| 1742 | * Address-independent error * |
| 1743 | *************************************************/ |
| 1744 | |
| 1745 | /* This function is called when there's an error that is not dependent on a |
| 1746 | particular address, such as an expansion string failure. It puts the error into |
| 1747 | all the addresses in a batch, logs the incident on the main and panic logs, and |
| 1748 | clears the expansions. It is mostly called from local_deliver(), but can be |
| 1749 | called for a remote delivery via findugid(). |
| 1750 | |
| 1751 | Arguments: |
| 1752 | logit TRUE if (MAIN+PANIC) logging required |
| 1753 | addr the first of the chain of addresses |
| 1754 | code the error code |
| 1755 | format format string for error message, or NULL if already set in addr |
| 1756 | ... arguments for the format |
| 1757 | |
| 1758 | Returns: nothing |
| 1759 | */ |
| 1760 | |
| 1761 | static void |
| 1762 | common_error(BOOL logit, address_item *addr, int code, uschar *format, ...) |
| 1763 | { |
| 1764 | addr->basic_errno = code; |
| 1765 | |
| 1766 | if (format) |
| 1767 | { |
| 1768 | va_list ap; |
| 1769 | gstring * g; |
| 1770 | |
| 1771 | va_start(ap, format); |
| 1772 | g = string_vformat(NULL, SVFMT_EXTEND|SVFMT_REBUFFER, CS format, ap); |
| 1773 | va_end(ap); |
| 1774 | addr->message = string_from_gstring(g); |
| 1775 | } |
| 1776 | |
| 1777 | for (address_item * addr2 = addr->next; addr2; addr2 = addr2->next) |
| 1778 | { |
| 1779 | addr2->basic_errno = code; |
| 1780 | addr2->message = addr->message; |
| 1781 | } |
| 1782 | |
| 1783 | if (logit) log_write(0, LOG_MAIN|LOG_PANIC, "%s", addr->message); |
| 1784 | deliver_set_expansions(NULL); |
| 1785 | } |
| 1786 | |
| 1787 | |
| 1788 | |
| 1789 | |
| 1790 | /************************************************* |
| 1791 | * Check a "never users" list * |
| 1792 | *************************************************/ |
| 1793 | |
| 1794 | /* This function is called to check whether a uid is on one of the two "never |
| 1795 | users" lists. |
| 1796 | |
| 1797 | Arguments: |
| 1798 | uid the uid to be checked |
| 1799 | nusers the list to be scanned; the first item in the list is the count |
| 1800 | |
| 1801 | Returns: TRUE if the uid is on the list |
| 1802 | */ |
| 1803 | |
| 1804 | static BOOL |
| 1805 | check_never_users(uid_t uid, uid_t *nusers) |
| 1806 | { |
| 1807 | if (!nusers) return FALSE; |
| 1808 | for (int i = 1; i <= (int)(nusers[0]); i++) if (nusers[i] == uid) return TRUE; |
| 1809 | return FALSE; |
| 1810 | } |
| 1811 | |
| 1812 | |
| 1813 | |
| 1814 | /************************************************* |
| 1815 | * Find uid and gid for a transport * |
| 1816 | *************************************************/ |
| 1817 | |
| 1818 | /* This function is called for both local and remote deliveries, to find the |
| 1819 | uid/gid under which to run the delivery. The values are taken preferentially |
| 1820 | from the transport (either explicit or deliver_as_creator), then from the |
| 1821 | address (i.e. the router), and if nothing is set, the exim uid/gid are used. If |
| 1822 | the resulting uid is on the "never_users" or the "fixed_never_users" list, a |
| 1823 | panic error is logged, and the function fails (which normally leads to delivery |
| 1824 | deferral). |
| 1825 | |
| 1826 | Arguments: |
| 1827 | addr the address (possibly a chain) |
| 1828 | tp the transport |
| 1829 | uidp pointer to uid field |
| 1830 | gidp pointer to gid field |
| 1831 | igfp pointer to the use_initgroups field |
| 1832 | |
| 1833 | Returns: FALSE if failed - error has been set in address(es) |
| 1834 | */ |
| 1835 | |
| 1836 | static BOOL |
| 1837 | findugid(address_item *addr, transport_instance *tp, uid_t *uidp, gid_t *gidp, |
| 1838 | BOOL *igfp) |
| 1839 | { |
| 1840 | uschar *nuname; |
| 1841 | BOOL gid_set = FALSE; |
| 1842 | |
| 1843 | /* Default initgroups flag comes from the transport */ |
| 1844 | |
| 1845 | *igfp = tp->initgroups; |
| 1846 | |
| 1847 | /* First see if there's a gid on the transport, either fixed or expandable. |
| 1848 | The expanding function always logs failure itself. */ |
| 1849 | |
| 1850 | if (tp->gid_set) |
| 1851 | { |
| 1852 | *gidp = tp->gid; |
| 1853 | gid_set = TRUE; |
| 1854 | } |
| 1855 | else if (tp->expand_gid) |
| 1856 | { |
| 1857 | if (!route_find_expanded_group(tp->expand_gid, tp->name, US"transport", gidp, |
| 1858 | &(addr->message))) |
| 1859 | { |
| 1860 | common_error(FALSE, addr, ERRNO_GIDFAIL, NULL); |
| 1861 | return FALSE; |
| 1862 | } |
| 1863 | gid_set = TRUE; |
| 1864 | } |
| 1865 | |
| 1866 | /* If the transport did not set a group, see if the router did. */ |
| 1867 | |
| 1868 | if (!gid_set && testflag(addr, af_gid_set)) |
| 1869 | { |
| 1870 | *gidp = addr->gid; |
| 1871 | gid_set = TRUE; |
| 1872 | } |
| 1873 | |
| 1874 | /* Pick up a uid from the transport if one is set. */ |
| 1875 | |
| 1876 | if (tp->uid_set) *uidp = tp->uid; |
| 1877 | |
| 1878 | /* Otherwise, try for an expandable uid field. If it ends up as a numeric id, |
| 1879 | it does not provide a passwd value from which a gid can be taken. */ |
| 1880 | |
| 1881 | else if (tp->expand_uid) |
| 1882 | { |
| 1883 | struct passwd *pw; |
| 1884 | if (!route_find_expanded_user(tp->expand_uid, tp->name, US"transport", &pw, |
| 1885 | uidp, &(addr->message))) |
| 1886 | { |
| 1887 | common_error(FALSE, addr, ERRNO_UIDFAIL, NULL); |
| 1888 | return FALSE; |
| 1889 | } |
| 1890 | if (!gid_set && pw) |
| 1891 | { |
| 1892 | *gidp = pw->pw_gid; |
| 1893 | gid_set = TRUE; |
| 1894 | } |
| 1895 | } |
| 1896 | |
| 1897 | /* If the transport doesn't set the uid, test the deliver_as_creator flag. */ |
| 1898 | |
| 1899 | else if (tp->deliver_as_creator) |
| 1900 | { |
| 1901 | *uidp = originator_uid; |
| 1902 | if (!gid_set) |
| 1903 | { |
| 1904 | *gidp = originator_gid; |
| 1905 | gid_set = TRUE; |
| 1906 | } |
| 1907 | } |
| 1908 | |
| 1909 | /* Otherwise see if the address specifies the uid and if so, take it and its |
| 1910 | initgroups flag. */ |
| 1911 | |
| 1912 | else if (testflag(addr, af_uid_set)) |
| 1913 | { |
| 1914 | *uidp = addr->uid; |
| 1915 | *igfp = testflag(addr, af_initgroups); |
| 1916 | } |
| 1917 | |
| 1918 | /* Nothing has specified the uid - default to the Exim user, and group if the |
| 1919 | gid is not set. */ |
| 1920 | |
| 1921 | else |
| 1922 | { |
| 1923 | *uidp = exim_uid; |
| 1924 | if (!gid_set) |
| 1925 | { |
| 1926 | *gidp = exim_gid; |
| 1927 | gid_set = TRUE; |
| 1928 | } |
| 1929 | } |
| 1930 | |
| 1931 | /* If no gid is set, it is a disaster. We default to the Exim gid only if |
| 1932 | defaulting to the Exim uid. In other words, if the configuration has specified |
| 1933 | a uid, it must also provide a gid. */ |
| 1934 | |
| 1935 | if (!gid_set) |
| 1936 | { |
| 1937 | common_error(TRUE, addr, ERRNO_GIDFAIL, US"User set without group for " |
| 1938 | "%s transport", tp->name); |
| 1939 | return FALSE; |
| 1940 | } |
| 1941 | |
| 1942 | /* Check that the uid is not on the lists of banned uids that may not be used |
| 1943 | for delivery processes. */ |
| 1944 | |
| 1945 | nuname = check_never_users(*uidp, never_users) |
| 1946 | ? US"never_users" |
| 1947 | : check_never_users(*uidp, fixed_never_users) |
| 1948 | ? US"fixed_never_users" |
| 1949 | : NULL; |
| 1950 | if (nuname) |
| 1951 | { |
| 1952 | common_error(TRUE, addr, ERRNO_UIDFAIL, US"User %ld set for %s transport " |
| 1953 | "is on the %s list", (long int)(*uidp), tp->name, nuname); |
| 1954 | return FALSE; |
| 1955 | } |
| 1956 | |
| 1957 | /* All is well */ |
| 1958 | |
| 1959 | return TRUE; |
| 1960 | } |
| 1961 | |
| 1962 | |
| 1963 | |
| 1964 | |
| 1965 | /************************************************* |
| 1966 | * Check the size of a message for a transport * |
| 1967 | *************************************************/ |
| 1968 | |
| 1969 | /* Checks that the message isn't too big for the selected transport. |
| 1970 | This is called only when it is known that the limit is set. |
| 1971 | |
| 1972 | Arguments: |
| 1973 | tp the transport |
| 1974 | addr the (first) address being delivered |
| 1975 | |
| 1976 | Returns: OK |
| 1977 | DEFER expansion failed or did not yield an integer |
| 1978 | FAIL message too big |
| 1979 | */ |
| 1980 | |
| 1981 | int |
| 1982 | check_message_size(transport_instance *tp, address_item *addr) |
| 1983 | { |
| 1984 | int rc = OK; |
| 1985 | int size_limit; |
| 1986 | |
| 1987 | deliver_set_expansions(addr); |
| 1988 | size_limit = expand_string_integer(tp->message_size_limit, TRUE); |
| 1989 | deliver_set_expansions(NULL); |
| 1990 | |
| 1991 | if (expand_string_message) |
| 1992 | { |
| 1993 | rc = DEFER; |
| 1994 | addr->message = size_limit == -1 |
| 1995 | ? string_sprintf("failed to expand message_size_limit " |
| 1996 | "in %s transport: %s", tp->name, expand_string_message) |
| 1997 | : string_sprintf("invalid message_size_limit " |
| 1998 | "in %s transport: %s", tp->name, expand_string_message); |
| 1999 | } |
| 2000 | else if (size_limit > 0 && message_size > size_limit) |
| 2001 | { |
| 2002 | rc = FAIL; |
| 2003 | addr->message = |
| 2004 | string_sprintf("message is too big (transport limit = %d)", |
| 2005 | size_limit); |
| 2006 | } |
| 2007 | |
| 2008 | return rc; |
| 2009 | } |
| 2010 | |
| 2011 | |
| 2012 | |
| 2013 | /************************************************* |
| 2014 | * Transport-time check for a previous delivery * |
| 2015 | *************************************************/ |
| 2016 | |
| 2017 | /* Check that this base address hasn't previously been delivered to its routed |
| 2018 | transport. If it has been delivered, mark it done. The check is necessary at |
| 2019 | delivery time in order to handle homonymic addresses correctly in cases where |
| 2020 | the pattern of redirection changes between delivery attempts (so the unique |
| 2021 | fields change). Non-homonymic previous delivery is detected earlier, at routing |
| 2022 | time (which saves unnecessary routing). |
| 2023 | |
| 2024 | Arguments: |
| 2025 | addr the address item |
| 2026 | testing TRUE if testing wanted only, without side effects |
| 2027 | |
| 2028 | Returns: TRUE if previously delivered by the transport |
| 2029 | */ |
| 2030 | |
| 2031 | static BOOL |
| 2032 | previously_transported(address_item *addr, BOOL testing) |
| 2033 | { |
| 2034 | uschar * s = string_sprintf("%s/%s", |
| 2035 | addr->unique + (testflag(addr, af_homonym)? 3:0), addr->transport->name); |
| 2036 | |
| 2037 | if (tree_search(tree_nonrecipients, s) != 0) |
| 2038 | { |
| 2039 | DEBUG(D_deliver|D_route|D_transport) |
| 2040 | debug_printf("%s was previously delivered (%s transport): discarded\n", |
| 2041 | addr->address, addr->transport->name); |
| 2042 | if (!testing) child_done(addr, tod_stamp(tod_log)); |
| 2043 | return TRUE; |
| 2044 | } |
| 2045 | |
| 2046 | return FALSE; |
| 2047 | } |
| 2048 | |
| 2049 | |
| 2050 | |
| 2051 | /****************************************************** |
| 2052 | * Check for a given header in a header string * |
| 2053 | ******************************************************/ |
| 2054 | |
| 2055 | /* This function is used when generating quota warnings. The configuration may |
| 2056 | specify any header lines it likes in quota_warn_message. If certain of them are |
| 2057 | missing, defaults are inserted, so we need to be able to test for the presence |
| 2058 | of a given header. |
| 2059 | |
| 2060 | Arguments: |
| 2061 | hdr the required header name |
| 2062 | hstring the header string |
| 2063 | |
| 2064 | Returns: TRUE the header is in the string |
| 2065 | FALSE the header is not in the string |
| 2066 | */ |
| 2067 | |
| 2068 | static BOOL |
| 2069 | contains_header(uschar *hdr, uschar *hstring) |
| 2070 | { |
| 2071 | int len = Ustrlen(hdr); |
| 2072 | uschar *p = hstring; |
| 2073 | while (*p != 0) |
| 2074 | { |
| 2075 | if (strncmpic(p, hdr, len) == 0) |
| 2076 | { |
| 2077 | p += len; |
| 2078 | while (*p == ' ' || *p == '\t') p++; |
| 2079 | if (*p == ':') return TRUE; |
| 2080 | } |
| 2081 | while (*p != 0 && *p != '\n') p++; |
| 2082 | if (*p == '\n') p++; |
| 2083 | } |
| 2084 | return FALSE; |
| 2085 | } |
| 2086 | |
| 2087 | |
| 2088 | |
| 2089 | |
| 2090 | /************************************************* |
| 2091 | * Perform a local delivery * |
| 2092 | *************************************************/ |
| 2093 | |
| 2094 | /* Each local delivery is performed in a separate process which sets its |
| 2095 | uid and gid as specified. This is a safer way than simply changing and |
| 2096 | restoring using seteuid(); there is a body of opinion that seteuid() cannot be |
| 2097 | used safely. From release 4, Exim no longer makes any use of it. Besides, not |
| 2098 | all systems have seteuid(). |
| 2099 | |
| 2100 | If the uid/gid are specified in the transport_instance, they are used; the |
| 2101 | transport initialization must ensure that either both or neither are set. |
| 2102 | Otherwise, the values associated with the address are used. If neither are set, |
| 2103 | it is a configuration error. |
| 2104 | |
| 2105 | The transport or the address may specify a home directory (transport over- |
| 2106 | rides), and if they do, this is set as $home. If neither have set a working |
| 2107 | directory, this value is used for that as well. Otherwise $home is left unset |
| 2108 | and the cwd is set to "/" - a directory that should be accessible to all users. |
| 2109 | |
| 2110 | Using a separate process makes it more complicated to get error information |
| 2111 | back. We use a pipe to pass the return code and also an error code and error |
| 2112 | text string back to the parent process. |
| 2113 | |
| 2114 | Arguments: |
| 2115 | addr points to an address block for this delivery; for "normal" local |
| 2116 | deliveries this is the only address to be delivered, but for |
| 2117 | pseudo-remote deliveries (e.g. by batch SMTP to a file or pipe) |
| 2118 | a number of addresses can be handled simultaneously, and in this |
| 2119 | case addr will point to a chain of addresses with the same |
| 2120 | characteristics. |
| 2121 | |
| 2122 | shadowing TRUE if running a shadow transport; this causes output from pipes |
| 2123 | to be ignored. |
| 2124 | |
| 2125 | Returns: nothing |
| 2126 | */ |
| 2127 | |
| 2128 | static void |
| 2129 | deliver_local(address_item *addr, BOOL shadowing) |
| 2130 | { |
| 2131 | BOOL use_initgroups; |
| 2132 | uid_t uid; |
| 2133 | gid_t gid; |
| 2134 | int status, len, rc; |
| 2135 | int pfd[2]; |
| 2136 | pid_t pid; |
| 2137 | uschar *working_directory; |
| 2138 | address_item *addr2; |
| 2139 | transport_instance *tp = addr->transport; |
| 2140 | |
| 2141 | /* Set up the return path from the errors or sender address. If the transport |
| 2142 | has its own return path setting, expand it and replace the existing value. */ |
| 2143 | |
| 2144 | if(addr->prop.errors_address) |
| 2145 | return_path = addr->prop.errors_address; |
| 2146 | #ifdef EXPERIMENTAL_SRS |
| 2147 | else if (addr->prop.srs_sender) |
| 2148 | return_path = addr->prop.srs_sender; |
| 2149 | #endif |
| 2150 | else |
| 2151 | return_path = sender_address; |
| 2152 | |
| 2153 | if (tp->return_path) |
| 2154 | { |
| 2155 | uschar *new_return_path = expand_string(tp->return_path); |
| 2156 | if (!new_return_path) |
| 2157 | { |
| 2158 | if (!f.expand_string_forcedfail) |
| 2159 | { |
| 2160 | common_error(TRUE, addr, ERRNO_EXPANDFAIL, |
| 2161 | US"Failed to expand return path \"%s\" in %s transport: %s", |
| 2162 | tp->return_path, tp->name, expand_string_message); |
| 2163 | return; |
| 2164 | } |
| 2165 | } |
| 2166 | else return_path = new_return_path; |
| 2167 | } |
| 2168 | |
| 2169 | /* For local deliveries, one at a time, the value used for logging can just be |
| 2170 | set directly, once and for all. */ |
| 2171 | |
| 2172 | used_return_path = return_path; |
| 2173 | |
| 2174 | /* Sort out the uid, gid, and initgroups flag. If an error occurs, the message |
| 2175 | gets put into the address(es), and the expansions are unset, so we can just |
| 2176 | return. */ |
| 2177 | |
| 2178 | if (!findugid(addr, tp, &uid, &gid, &use_initgroups)) return; |
| 2179 | |
| 2180 | /* See if either the transport or the address specifies a home directory. A |
| 2181 | home directory set in the address may already be expanded; a flag is set to |
| 2182 | indicate that. In other cases we must expand it. */ |
| 2183 | |
| 2184 | if ( (deliver_home = tp->home_dir) /* Set in transport, or */ |
| 2185 | || ( (deliver_home = addr->home_dir) /* Set in address and */ |
| 2186 | && !testflag(addr, af_home_expanded) /* not expanded */ |
| 2187 | ) ) |
| 2188 | { |
| 2189 | uschar *rawhome = deliver_home; |
| 2190 | deliver_home = NULL; /* in case it contains $home */ |
| 2191 | if (!(deliver_home = expand_string(rawhome))) |
| 2192 | { |
| 2193 | common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"home directory \"%s\" failed " |
| 2194 | "to expand for %s transport: %s", rawhome, tp->name, |
| 2195 | expand_string_message); |
| 2196 | return; |
| 2197 | } |
| 2198 | if (*deliver_home != '/') |
| 2199 | { |
| 2200 | common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"home directory path \"%s\" " |
| 2201 | "is not absolute for %s transport", deliver_home, tp->name); |
| 2202 | return; |
| 2203 | } |
| 2204 | } |
| 2205 | |
| 2206 | /* See if either the transport or the address specifies a current directory, |
| 2207 | and if so, expand it. If nothing is set, use the home directory, unless it is |
| 2208 | also unset in which case use "/", which is assumed to be a directory to which |
| 2209 | all users have access. It is necessary to be in a visible directory for some |
| 2210 | operating systems when running pipes, as some commands (e.g. "rm" under Solaris |
| 2211 | 2.5) require this. */ |
| 2212 | |
| 2213 | working_directory = tp->current_dir ? tp->current_dir : addr->current_dir; |
| 2214 | if (working_directory) |
| 2215 | { |
| 2216 | uschar *raw = working_directory; |
| 2217 | if (!(working_directory = expand_string(raw))) |
| 2218 | { |
| 2219 | common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"current directory \"%s\" " |
| 2220 | "failed to expand for %s transport: %s", raw, tp->name, |
| 2221 | expand_string_message); |
| 2222 | return; |
| 2223 | } |
| 2224 | if (*working_directory != '/') |
| 2225 | { |
| 2226 | common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"current directory path " |
| 2227 | "\"%s\" is not absolute for %s transport", working_directory, tp->name); |
| 2228 | return; |
| 2229 | } |
| 2230 | } |
| 2231 | else working_directory = deliver_home ? deliver_home : US"/"; |
| 2232 | |
| 2233 | /* If one of the return_output flags is set on the transport, create and open a |
| 2234 | file in the message log directory for the transport to write its output onto. |
| 2235 | This is mainly used by pipe transports. The file needs to be unique to the |
| 2236 | address. This feature is not available for shadow transports. */ |
| 2237 | |
| 2238 | if ( !shadowing |
| 2239 | && ( tp->return_output || tp->return_fail_output |
| 2240 | || tp->log_output || tp->log_fail_output || tp->log_defer_output |
| 2241 | ) ) |
| 2242 | { |
| 2243 | uschar * error; |
| 2244 | |
| 2245 | addr->return_filename = |
| 2246 | spool_fname(US"msglog", message_subdir, message_id, |
| 2247 | string_sprintf("-%d-%d", getpid(), return_count++)); |
| 2248 | |
| 2249 | if ((addr->return_file = open_msglog_file(addr->return_filename, 0400, &error)) < 0) |
| 2250 | { |
| 2251 | common_error(TRUE, addr, errno, US"Unable to %s file for %s transport " |
| 2252 | "to return message: %s", error, tp->name, strerror(errno)); |
| 2253 | return; |
| 2254 | } |
| 2255 | } |
| 2256 | |
| 2257 | /* Create the pipe for inter-process communication. */ |
| 2258 | |
| 2259 | if (pipe(pfd) != 0) |
| 2260 | { |
| 2261 | common_error(TRUE, addr, ERRNO_PIPEFAIL, US"Creation of pipe failed: %s", |
| 2262 | strerror(errno)); |
| 2263 | return; |
| 2264 | } |
| 2265 | |
| 2266 | /* Now fork the process to do the real work in the subprocess, but first |
| 2267 | ensure that all cached resources are freed so that the subprocess starts with |
| 2268 | a clean slate and doesn't interfere with the parent process. */ |
| 2269 | |
| 2270 | search_tidyup(); |
| 2271 | |
| 2272 | if ((pid = exim_fork(US"delivery-local")) == 0) |
| 2273 | { |
| 2274 | BOOL replicate = TRUE; |
| 2275 | |
| 2276 | /* Prevent core dumps, as we don't want them in users' home directories. |
| 2277 | HP-UX doesn't have RLIMIT_CORE; I don't know how to do this in that |
| 2278 | system. Some experimental/developing systems (e.g. GNU/Hurd) may define |
| 2279 | RLIMIT_CORE but not support it in setrlimit(). For such systems, do not |
| 2280 | complain if the error is "not supported". |
| 2281 | |
| 2282 | There are two scenarios where changing the max limit has an effect. In one, |
| 2283 | the user is using a .forward and invoking a command of their choice via pipe; |
| 2284 | for these, we do need the max limit to be 0 unless the admin chooses to |
| 2285 | permit an increased limit. In the other, the command is invoked directly by |
| 2286 | the transport and is under administrator control, thus being able to raise |
| 2287 | the limit aids in debugging. So there's no general always-right answer. |
| 2288 | |
| 2289 | Thus we inhibit core-dumps completely but let individual transports, while |
| 2290 | still root, re-raise the limits back up to aid debugging. We make the |
| 2291 | default be no core-dumps -- few enough people can use core dumps in |
| 2292 | diagnosis that it's reasonable to make them something that has to be explicitly requested. |
| 2293 | */ |
| 2294 | |
| 2295 | #ifdef RLIMIT_CORE |
| 2296 | struct rlimit rl; |
| 2297 | rl.rlim_cur = 0; |
| 2298 | rl.rlim_max = 0; |
| 2299 | if (setrlimit(RLIMIT_CORE, &rl) < 0) |
| 2300 | { |
| 2301 | # ifdef SETRLIMIT_NOT_SUPPORTED |
| 2302 | if (errno != ENOSYS && errno != ENOTSUP) |
| 2303 | # endif |
| 2304 | log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_CORE) failed: %s", |
| 2305 | strerror(errno)); |
| 2306 | } |
| 2307 | #endif |
| 2308 | |
| 2309 | /* Reset the random number generator, so different processes don't all |
| 2310 | have the same sequence. */ |
| 2311 | |
| 2312 | random_seed = 0; |
| 2313 | |
| 2314 | /* If the transport has a setup entry, call this first, while still |
| 2315 | privileged. (Appendfile uses this to expand quota, for example, while |
| 2316 | able to read private files.) */ |
| 2317 | |
| 2318 | if (addr->transport->setup) |
| 2319 | switch((addr->transport->setup)(addr->transport, addr, NULL, uid, gid, |
| 2320 | &(addr->message))) |
| 2321 | { |
| 2322 | case DEFER: |
| 2323 | addr->transport_return = DEFER; |
| 2324 | goto PASS_BACK; |
| 2325 | |
| 2326 | case FAIL: |
| 2327 | addr->transport_return = PANIC; |
| 2328 | goto PASS_BACK; |
| 2329 | } |
| 2330 | |
| 2331 | /* Ignore SIGINT and SIGTERM during delivery. Also ignore SIGUSR1, as |
| 2332 | when the process becomes unprivileged, it won't be able to write to the |
| 2333 | process log. SIGHUP is ignored throughout exim, except when it is being |
| 2334 | run as a daemon. */ |
| 2335 | |
| 2336 | signal(SIGINT, SIG_IGN); |
| 2337 | signal(SIGTERM, SIG_IGN); |
| 2338 | signal(SIGUSR1, SIG_IGN); |
| 2339 | |
| 2340 | /* Close the unwanted half of the pipe, and set close-on-exec for the other |
| 2341 | half - for transports that exec things (e.g. pipe). Then set the required |
| 2342 | gid/uid. */ |
| 2343 | |
| 2344 | (void)close(pfd[pipe_read]); |
| 2345 | (void)fcntl(pfd[pipe_write], F_SETFD, fcntl(pfd[pipe_write], F_GETFD) | |
| 2346 | FD_CLOEXEC); |
| 2347 | exim_setugid(uid, gid, use_initgroups, |
| 2348 | string_sprintf("local delivery to %s <%s> transport=%s", addr->local_part, |
| 2349 | addr->address, addr->transport->name)); |
| 2350 | |
| 2351 | DEBUG(D_deliver) |
| 2352 | { |
| 2353 | debug_printf(" home=%s current=%s\n", deliver_home, working_directory); |
| 2354 | for (address_item * batched = addr->next; batched; batched = batched->next) |
| 2355 | debug_printf("additional batched address: %s\n", batched->address); |
| 2356 | } |
| 2357 | |
| 2358 | /* Set an appropriate working directory. */ |
| 2359 | |
| 2360 | if (Uchdir(working_directory) < 0) |
| 2361 | { |
| 2362 | addr->transport_return = DEFER; |
| 2363 | addr->basic_errno = errno; |
| 2364 | addr->message = string_sprintf("failed to chdir to %s", working_directory); |
| 2365 | } |
| 2366 | |
| 2367 | /* If successful, call the transport */ |
| 2368 | |
| 2369 | else |
| 2370 | { |
| 2371 | BOOL ok = TRUE; |
| 2372 | set_process_info("delivering %s to %s using %s", message_id, |
| 2373 | addr->local_part, addr->transport->name); |
| 2374 | |
| 2375 | /* Setting this global in the subprocess means we need never clear it */ |
| 2376 | transport_name = addr->transport->name; |
| 2377 | |
| 2378 | /* If a transport filter has been specified, set up its argument list. |
| 2379 | Any errors will get put into the address, and FALSE yielded. */ |
| 2380 | |
| 2381 | if (addr->transport->filter_command) |
| 2382 | { |
| 2383 | ok = transport_set_up_command(&transport_filter_argv, |
| 2384 | addr->transport->filter_command, |
| 2385 | TRUE, PANIC, addr, US"transport filter", NULL); |
| 2386 | transport_filter_timeout = addr->transport->filter_timeout; |
| 2387 | } |
| 2388 | else transport_filter_argv = NULL; |
| 2389 | |
| 2390 | if (ok) |
| 2391 | { |
| 2392 | debug_print_string(addr->transport->debug_string); |
| 2393 | replicate = !(addr->transport->info->code)(addr->transport, addr); |
| 2394 | } |
| 2395 | } |
| 2396 | |
| 2397 | /* Pass the results back down the pipe. If necessary, first replicate the |
| 2398 | status in the top address to the others in the batch. The label is the |
| 2399 | subject of a goto when a call to the transport's setup function fails. We |
| 2400 | pass the pointer to the transport back in case it got changed as a result of |
| 2401 | file_format in appendfile. */ |
| 2402 | |
| 2403 | PASS_BACK: |
| 2404 | |
| 2405 | if (replicate) replicate_status(addr); |
| 2406 | for (addr2 = addr; addr2; addr2 = addr2->next) |
| 2407 | { |
| 2408 | int i; |
| 2409 | int local_part_length = Ustrlen(addr2->local_part); |
| 2410 | uschar *s; |
| 2411 | int ret; |
| 2412 | |
| 2413 | if( (ret = write(pfd[pipe_write], &addr2->transport_return, sizeof(int))) != sizeof(int) |
| 2414 | || (ret = write(pfd[pipe_write], &transport_count, sizeof(transport_count))) != sizeof(transport_count) |
| 2415 | || (ret = write(pfd[pipe_write], &addr2->flags, sizeof(addr2->flags))) != sizeof(addr2->flags) |
| 2416 | || (ret = write(pfd[pipe_write], &addr2->basic_errno, sizeof(int))) != sizeof(int) |
| 2417 | || (ret = write(pfd[pipe_write], &addr2->more_errno, sizeof(int))) != sizeof(int) |
| 2418 | || (ret = write(pfd[pipe_write], &addr2->delivery_time, sizeof(struct timeval))) != sizeof(struct timeval) |
| 2419 | || (ret = write(pfd[pipe_write], &addr2->special_action, sizeof(int))) != sizeof(int) |
| 2420 | || (ret = write(pfd[pipe_write], &addr2->transport, |
| 2421 | sizeof(transport_instance *))) != sizeof(transport_instance *) |
| 2422 | |
| 2423 | /* For a file delivery, pass back the local part, in case the original |
| 2424 | was only part of the final delivery path. This gives more complete |
| 2425 | logging. */ |
| 2426 | |
| 2427 | || (testflag(addr2, af_file) |
| 2428 | && ( (ret = write(pfd[pipe_write], &local_part_length, sizeof(int))) != sizeof(int) |
| 2429 | || (ret = write(pfd[pipe_write], addr2->local_part, local_part_length)) != local_part_length |
| 2430 | ) |
| 2431 | ) |
| 2432 | ) |
| 2433 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s", |
| 2434 | ret == -1 ? strerror(errno) : "short write"); |
| 2435 | |
| 2436 | /* Now any messages */ |
| 2437 | |
| 2438 | for (i = 0, s = addr2->message; i < 2; i++, s = addr2->user_message) |
| 2439 | { |
| 2440 | int message_length = s ? Ustrlen(s) + 1 : 0; |
| 2441 | if( (ret = write(pfd[pipe_write], &message_length, sizeof(int))) != sizeof(int) |
| 2442 | || message_length > 0 && (ret = write(pfd[pipe_write], s, message_length)) != message_length |
| 2443 | ) |
| 2444 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s", |
| 2445 | ret == -1 ? strerror(errno) : "short write"); |
| 2446 | } |
| 2447 | } |
| 2448 | |
| 2449 | /* OK, this process is now done. Free any cached resources that it opened, |
| 2450 | and close the pipe we were writing down before exiting. */ |
| 2451 | |
| 2452 | (void)close(pfd[pipe_write]); |
| 2453 | search_tidyup(); |
| 2454 | exit(EXIT_SUCCESS); |
| 2455 | } |
| 2456 | |
| 2457 | /* Back in the main process: panic if the fork did not succeed. This seems |
| 2458 | better than returning an error - if forking is failing it is probably best |
| 2459 | not to try other deliveries for this message. */ |
| 2460 | |
| 2461 | if (pid < 0) |
| 2462 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Fork failed for local delivery to %s", |
| 2463 | addr->address); |
| 2464 | |
| 2465 | /* Read the pipe to get the delivery status codes and error messages. Our copy |
| 2466 | of the writing end must be closed first, as otherwise read() won't return zero |
| 2467 | on an empty pipe. We check that a status exists for each address before |
| 2468 | overwriting the address structure. If data is missing, the default DEFER status |
| 2469 | will remain. Afterwards, close the reading end. */ |
| 2470 | |
| 2471 | (void)close(pfd[pipe_write]); |
| 2472 | |
| 2473 | for (addr2 = addr; addr2; addr2 = addr2->next) |
| 2474 | { |
| 2475 | if ((len = read(pfd[pipe_read], &status, sizeof(int))) > 0) |
| 2476 | { |
| 2477 | int i; |
| 2478 | uschar **sptr; |
| 2479 | |
| 2480 | addr2->transport_return = status; |
| 2481 | len = read(pfd[pipe_read], &transport_count, |
| 2482 | sizeof(transport_count)); |
| 2483 | len = read(pfd[pipe_read], &addr2->flags, sizeof(addr2->flags)); |
| 2484 | len = read(pfd[pipe_read], &addr2->basic_errno, sizeof(int)); |
| 2485 | len = read(pfd[pipe_read], &addr2->more_errno, sizeof(int)); |
| 2486 | len = read(pfd[pipe_read], &addr2->delivery_time, sizeof(struct timeval)); |
| 2487 | len = read(pfd[pipe_read], &addr2->special_action, sizeof(int)); |
| 2488 | len = read(pfd[pipe_read], &addr2->transport, |
| 2489 | sizeof(transport_instance *)); |
| 2490 | |
| 2491 | if (testflag(addr2, af_file)) |
| 2492 | { |
| 2493 | int llen; |
| 2494 | if ( read(pfd[pipe_read], &llen, sizeof(int)) != sizeof(int) |
| 2495 | || llen > 64*4 /* limit from rfc 5821, times I18N factor */ |
| 2496 | ) |
| 2497 | { |
| 2498 | log_write(0, LOG_MAIN|LOG_PANIC, "bad local_part length read" |
| 2499 | " from delivery subprocess"); |
| 2500 | break; |
| 2501 | } |
| 2502 | /* sanity-checked llen so disable the Coverity error */ |
| 2503 | /* coverity[tainted_data] */ |
| 2504 | if (read(pfd[pipe_read], big_buffer, llen) != llen) |
| 2505 | { |
| 2506 | log_write(0, LOG_MAIN|LOG_PANIC, "bad local_part read" |
| 2507 | " from delivery subprocess"); |
| 2508 | break; |
| 2509 | } |
| 2510 | big_buffer[llen] = 0; |
| 2511 | addr2->local_part = string_copy(big_buffer); |
| 2512 | } |
| 2513 | |
| 2514 | for (i = 0, sptr = &addr2->message; i < 2; i++, sptr = &addr2->user_message) |
| 2515 | { |
| 2516 | int message_length; |
| 2517 | len = read(pfd[pipe_read], &message_length, sizeof(int)); |
| 2518 | if (message_length > 0) |
| 2519 | { |
| 2520 | len = read(pfd[pipe_read], big_buffer, message_length); |
| 2521 | big_buffer[big_buffer_size-1] = '\0'; /* guard byte */ |
| 2522 | if (len > 0) *sptr = string_copy(big_buffer); |
| 2523 | } |
| 2524 | } |
| 2525 | } |
| 2526 | |
| 2527 | else |
| 2528 | { |
| 2529 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to read delivery status for %s " |
| 2530 | "from delivery subprocess", addr2->unique); |
| 2531 | break; |
| 2532 | } |
| 2533 | } |
| 2534 | |
| 2535 | (void)close(pfd[pipe_read]); |
| 2536 | |
| 2537 | /* Unless shadowing, write all successful addresses immediately to the journal |
| 2538 | file, to ensure they are recorded asap. For homonymic addresses, use the base |
| 2539 | address plus the transport name. Failure to write the journal is panic-worthy, |
| 2540 | but don't stop, as it may prove possible subsequently to update the spool file |
| 2541 | in order to record the delivery. */ |
| 2542 | |
| 2543 | if (!shadowing) |
| 2544 | { |
| 2545 | for (addr2 = addr; addr2; addr2 = addr2->next) |
| 2546 | if (addr2->transport_return == OK) |
| 2547 | { |
| 2548 | if (testflag(addr2, af_homonym)) |
| 2549 | sprintf(CS big_buffer, "%.500s/%s\n", addr2->unique + 3, tp->name); |
| 2550 | else |
| 2551 | sprintf(CS big_buffer, "%.500s\n", addr2->unique); |
| 2552 | |
| 2553 | /* In the test harness, wait just a bit to let the subprocess finish off |
| 2554 | any debug output etc first. */ |
| 2555 | |
| 2556 | testharness_pause_ms(300); |
| 2557 | |
| 2558 | DEBUG(D_deliver) debug_printf("journalling %s", big_buffer); |
| 2559 | len = Ustrlen(big_buffer); |
| 2560 | if (write(journal_fd, big_buffer, len) != len) |
| 2561 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to update journal for %s: %s", |
| 2562 | big_buffer, strerror(errno)); |
| 2563 | } |
| 2564 | |
| 2565 | /* Ensure the journal file is pushed out to disk. */ |
| 2566 | |
| 2567 | if (EXIMfsync(journal_fd) < 0) |
| 2568 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s", |
| 2569 | strerror(errno)); |
| 2570 | } |
| 2571 | |
| 2572 | /* Wait for the process to finish. If it terminates with a non-zero code, |
| 2573 | freeze the message (except for SIGTERM, SIGKILL and SIGQUIT), but leave the |
| 2574 | status values of all the addresses as they are. Take care to handle the case |
| 2575 | when the subprocess doesn't seem to exist. This has been seen on one system |
| 2576 | when Exim was called from an MUA that set SIGCHLD to SIG_IGN. When that |
| 2577 | happens, wait() doesn't recognize the termination of child processes. Exim now |
| 2578 | resets SIGCHLD to SIG_DFL, but this code should still be robust. */ |
| 2579 | |
| 2580 | while ((rc = wait(&status)) != pid) |
| 2581 | if (rc < 0 && errno == ECHILD) /* Process has vanished */ |
| 2582 | { |
| 2583 | log_write(0, LOG_MAIN, "%s transport process vanished unexpectedly", |
| 2584 | addr->transport->driver_name); |
| 2585 | status = 0; |
| 2586 | break; |
| 2587 | } |
| 2588 | |
| 2589 | if ((status & 0xffff) != 0) |
| 2590 | { |
| 2591 | int msb = (status >> 8) & 255; |
| 2592 | int lsb = status & 255; |
| 2593 | int code = (msb == 0)? (lsb & 0x7f) : msb; |
| 2594 | if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT)) |
| 2595 | addr->special_action = SPECIAL_FREEZE; |
| 2596 | log_write(0, LOG_MAIN|LOG_PANIC, "%s transport process returned non-zero " |
| 2597 | "status 0x%04x: %s %d", |
| 2598 | addr->transport->driver_name, |
| 2599 | status, |
| 2600 | msb == 0 ? "terminated by signal" : "exit code", |
| 2601 | code); |
| 2602 | } |
| 2603 | |
| 2604 | /* If SPECIAL_WARN is set in the top address, send a warning message. */ |
| 2605 | |
| 2606 | if (addr->special_action == SPECIAL_WARN && addr->transport->warn_message) |
| 2607 | { |
| 2608 | int fd; |
| 2609 | uschar *warn_message; |
| 2610 | pid_t pid; |
| 2611 | |
| 2612 | DEBUG(D_deliver) debug_printf("Warning message requested by transport\n"); |
| 2613 | |
| 2614 | if (!(warn_message = expand_string(addr->transport->warn_message))) |
| 2615 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand \"%s\" (warning " |
| 2616 | "message for %s transport): %s", addr->transport->warn_message, |
| 2617 | addr->transport->name, expand_string_message); |
| 2618 | |
| 2619 | else if ((pid = child_open_exim(&fd, US"tpt-warning-message")) > 0) |
| 2620 | { |
| 2621 | FILE *f = fdopen(fd, "wb"); |
| 2622 | if (errors_reply_to && !contains_header(US"Reply-To", warn_message)) |
| 2623 | fprintf(f, "Reply-To: %s\n", errors_reply_to); |
| 2624 | fprintf(f, "Auto-Submitted: auto-replied\n"); |
| 2625 | if (!contains_header(US"From", warn_message)) |
| 2626 | moan_write_from(f); |
| 2627 | fprintf(f, "%s", CS warn_message); |
| 2628 | |
| 2629 | /* Close and wait for child process to complete, without a timeout. */ |
| 2630 | |
| 2631 | (void)fclose(f); |
| 2632 | (void)child_close(pid, 0); |
| 2633 | } |
| 2634 | |
| 2635 | addr->special_action = SPECIAL_NONE; |
| 2636 | } |
| 2637 | } |
| 2638 | |
| 2639 | |
| 2640 | |
| 2641 | |
| 2642 | /* Check transport for the given concurrency limit. Return TRUE if over |
| 2643 | the limit (or an expansion failure), else FALSE and if there was a limit, |
| 2644 | the key for the hints database used for the concurrency count. */ |
| 2645 | |
| 2646 | static BOOL |
| 2647 | tpt_parallel_check(transport_instance * tp, address_item * addr, uschar ** key) |
| 2648 | { |
| 2649 | unsigned max_parallel; |
| 2650 | |
| 2651 | if (!tp->max_parallel) return FALSE; |
| 2652 | |
| 2653 | max_parallel = (unsigned) expand_string_integer(tp->max_parallel, TRUE); |
| 2654 | if (expand_string_message) |
| 2655 | { |
| 2656 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand max_parallel option " |
| 2657 | "in %s transport (%s): %s", tp->name, addr->address, |
| 2658 | expand_string_message); |
| 2659 | return TRUE; |
| 2660 | } |
| 2661 | |
| 2662 | if (max_parallel > 0) |
| 2663 | { |
| 2664 | uschar * serialize_key = string_sprintf("tpt-serialize-%s", tp->name); |
| 2665 | if (!enq_start(serialize_key, max_parallel)) |
| 2666 | { |
| 2667 | address_item * next; |
| 2668 | DEBUG(D_transport) |
| 2669 | debug_printf("skipping tpt %s because concurrency limit %u reached\n", |
| 2670 | tp->name, max_parallel); |
| 2671 | do |
| 2672 | { |
| 2673 | next = addr->next; |
| 2674 | addr->message = US"concurrency limit reached for transport"; |
| 2675 | addr->basic_errno = ERRNO_TRETRY; |
| 2676 | post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_TRANSPORT, 0); |
| 2677 | } while ((addr = next)); |
| 2678 | return TRUE; |
| 2679 | } |
| 2680 | *key = serialize_key; |
| 2681 | } |
| 2682 | return FALSE; |
| 2683 | } |
| 2684 | |
| 2685 | |
| 2686 | |
| 2687 | /************************************************* |
| 2688 | * Do local deliveries * |
| 2689 | *************************************************/ |
| 2690 | |
| 2691 | /* This function processes the list of addresses in addr_local. True local |
| 2692 | deliveries are always done one address at a time. However, local deliveries can |
| 2693 | be batched up in some cases. Typically this is when writing batched SMTP output |
| 2694 | files for use by some external transport mechanism, or when running local |
| 2695 | deliveries over LMTP. |
| 2696 | |
| 2697 | Arguments: None |
| 2698 | Returns: Nothing |
| 2699 | */ |
| 2700 | |
| 2701 | static void |
| 2702 | do_local_deliveries(void) |
| 2703 | { |
| 2704 | open_db dbblock; |
| 2705 | open_db *dbm_file = NULL; |
| 2706 | time_t now = time(NULL); |
| 2707 | |
| 2708 | /* Loop until we have exhausted the supply of local deliveries */ |
| 2709 | |
| 2710 | while (addr_local) |
| 2711 | { |
| 2712 | struct timeval delivery_start; |
| 2713 | struct timeval deliver_time; |
| 2714 | address_item *addr2, *addr3, *nextaddr; |
| 2715 | int logflags = LOG_MAIN; |
| 2716 | int logchar = f.dont_deliver? '*' : '='; |
| 2717 | transport_instance *tp; |
| 2718 | uschar * serialize_key = NULL; |
| 2719 | |
| 2720 | /* Pick the first undelivered address off the chain */ |
| 2721 | |
| 2722 | address_item *addr = addr_local; |
| 2723 | addr_local = addr->next; |
| 2724 | addr->next = NULL; |
| 2725 | |
| 2726 | DEBUG(D_deliver|D_transport) |
| 2727 | debug_printf("--------> %s <--------\n", addr->address); |
| 2728 | |
| 2729 | /* An internal disaster if there is no transport. Should not occur! */ |
| 2730 | |
| 2731 | if (!(tp = addr->transport)) |
| 2732 | { |
| 2733 | logflags |= LOG_PANIC; |
| 2734 | f.disable_logging = FALSE; /* Jic */ |
| 2735 | addr->message = addr->router |
| 2736 | ? string_sprintf("No transport set by %s router", addr->router->name) |
| 2737 | : US"No transport set by system filter"; |
| 2738 | post_process_one(addr, DEFER, logflags, EXIM_DTYPE_TRANSPORT, 0); |
| 2739 | continue; |
| 2740 | } |
| 2741 | |
| 2742 | /* Check that this base address hasn't previously been delivered to this |
| 2743 | transport. The check is necessary at this point to handle homonymic addresses |
| 2744 | correctly in cases where the pattern of redirection changes between delivery |
| 2745 | attempts. Non-homonymic previous delivery is detected earlier, at routing |
| 2746 | time. */ |
| 2747 | |
| 2748 | if (previously_transported(addr, FALSE)) continue; |
| 2749 | |
| 2750 | /* There are weird cases where logging is disabled */ |
| 2751 | |
| 2752 | f.disable_logging = tp->disable_logging; |
| 2753 | |
| 2754 | /* Check for batched addresses and possible amalgamation. Skip all the work |
| 2755 | if either batch_max <= 1 or there aren't any other addresses for local |
| 2756 | delivery. */ |
| 2757 | |
| 2758 | if (tp->batch_max > 1 && addr_local) |
| 2759 | { |
| 2760 | int batch_count = 1; |
| 2761 | BOOL uses_dom = readconf_depends((driver_instance *)tp, US"domain"); |
| 2762 | BOOL uses_lp = ( testflag(addr, af_pfr) |
| 2763 | && (testflag(addr, af_file) || addr->local_part[0] == '|') |
| 2764 | ) |
| 2765 | || readconf_depends((driver_instance *)tp, US"local_part"); |
| 2766 | uschar *batch_id = NULL; |
| 2767 | address_item **anchor = &addr_local; |
| 2768 | address_item *last = addr; |
| 2769 | address_item *next; |
| 2770 | |
| 2771 | /* Expand the batch_id string for comparison with other addresses. |
| 2772 | Expansion failure suppresses batching. */ |
| 2773 | |
| 2774 | if (tp->batch_id) |
| 2775 | { |
| 2776 | deliver_set_expansions(addr); |
| 2777 | batch_id = expand_string(tp->batch_id); |
| 2778 | deliver_set_expansions(NULL); |
| 2779 | if (!batch_id) |
| 2780 | { |
| 2781 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option " |
| 2782 | "in %s transport (%s): %s", tp->name, addr->address, |
| 2783 | expand_string_message); |
| 2784 | batch_count = tp->batch_max; |
| 2785 | } |
| 2786 | } |
| 2787 | |
| 2788 | /* Until we reach the batch_max limit, pick off addresses which have the |
| 2789 | same characteristics. These are: |
| 2790 | |
| 2791 | same transport |
| 2792 | not previously delivered (see comment about 50 lines above) |
| 2793 | same local part if the transport's configuration contains $local_part |
| 2794 | or if this is a file or pipe delivery from a redirection |
| 2795 | same domain if the transport's configuration contains $domain |
| 2796 | same errors address |
| 2797 | same additional headers |
| 2798 | same headers to be removed |
| 2799 | same uid/gid for running the transport |
| 2800 | same first host if a host list is set |
| 2801 | */ |
| 2802 | |
| 2803 | while ((next = *anchor) && batch_count < tp->batch_max) |
| 2804 | { |
| 2805 | BOOL ok = |
| 2806 | tp == next->transport |
| 2807 | && !previously_transported(next, TRUE) |
| 2808 | && testflag(addr, af_pfr) == testflag(next, af_pfr) |
| 2809 | && testflag(addr, af_file) == testflag(next, af_file) |
| 2810 | && (!uses_lp || Ustrcmp(next->local_part, addr->local_part) == 0) |
| 2811 | && (!uses_dom || Ustrcmp(next->domain, addr->domain) == 0) |
| 2812 | && same_strings(next->prop.errors_address, addr->prop.errors_address) |
| 2813 | && same_headers(next->prop.extra_headers, addr->prop.extra_headers) |
| 2814 | && same_strings(next->prop.remove_headers, addr->prop.remove_headers) |
| 2815 | && same_ugid(tp, addr, next) |
| 2816 | && ( !addr->host_list && !next->host_list |
| 2817 | || addr->host_list |
| 2818 | && next->host_list |
| 2819 | && Ustrcmp(addr->host_list->name, next->host_list->name) == 0 |
| 2820 | ); |
| 2821 | |
| 2822 | /* If the transport has a batch_id setting, batch_id will be non-NULL |
| 2823 | from the expansion outside the loop. Expand for this address and compare. |
| 2824 | Expansion failure makes this address ineligible for batching. */ |
| 2825 | |
| 2826 | if (ok && batch_id) |
| 2827 | { |
| 2828 | uschar *bid; |
| 2829 | address_item *save_nextnext = next->next; |
| 2830 | next->next = NULL; /* Expansion for a single address */ |
| 2831 | deliver_set_expansions(next); |
| 2832 | next->next = save_nextnext; |
| 2833 | bid = expand_string(tp->batch_id); |
| 2834 | deliver_set_expansions(NULL); |
| 2835 | if (!bid) |
| 2836 | { |
| 2837 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option " |
| 2838 | "in %s transport (%s): %s", tp->name, next->address, |
| 2839 | expand_string_message); |
| 2840 | ok = FALSE; |
| 2841 | } |
| 2842 | else ok = (Ustrcmp(batch_id, bid) == 0); |
| 2843 | } |
| 2844 | |
| 2845 | /* Take address into batch if OK. */ |
| 2846 | |
| 2847 | if (ok) |
| 2848 | { |
| 2849 | *anchor = next->next; /* Include the address */ |
| 2850 | next->next = NULL; |
| 2851 | last->next = next; |
| 2852 | last = next; |
| 2853 | batch_count++; |
| 2854 | } |
| 2855 | else anchor = &next->next; /* Skip the address */ |
| 2856 | } |
| 2857 | } |
| 2858 | |
| 2859 | /* We now have one or more addresses that can be delivered in a batch. Check |
| 2860 | whether the transport is prepared to accept a message of this size. If not, |
| 2861 | fail them all forthwith. If the expansion fails, or does not yield an |
| 2862 | integer, defer delivery. */ |
| 2863 | |
| 2864 | if (tp->message_size_limit) |
| 2865 | { |
| 2866 | int rc = check_message_size(tp, addr); |
| 2867 | if (rc != OK) |
| 2868 | { |
| 2869 | replicate_status(addr); |
| 2870 | while (addr) |
| 2871 | { |
| 2872 | addr2 = addr->next; |
| 2873 | post_process_one(addr, rc, logflags, EXIM_DTYPE_TRANSPORT, 0); |
| 2874 | addr = addr2; |
| 2875 | } |
| 2876 | continue; /* With next batch of addresses */ |
| 2877 | } |
| 2878 | } |
| 2879 | |
| 2880 | /* If we are not running the queue, or if forcing, all deliveries will be |
| 2881 | attempted. Otherwise, we must respect the retry times for each address. Even |
| 2882 | when not doing this, we need to set up the retry key string, and determine |
| 2883 | whether a retry record exists, because after a successful delivery, a delete |
| 2884 | retry item must be set up. Keep the retry database open only for the duration |
| 2885 | of these checks, rather than for all local deliveries, because some local |
| 2886 | deliveries (e.g. to pipes) can take a substantial time. */ |
| 2887 | |
| 2888 | if (!(dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE, TRUE))) |
| 2889 | { |
| 2890 | DEBUG(D_deliver|D_retry|D_hints_lookup) |
| 2891 | debug_printf("no retry data available\n"); |
| 2892 | } |
| 2893 | |
| 2894 | addr2 = addr; |
| 2895 | addr3 = NULL; |
| 2896 | while (addr2) |
| 2897 | { |
| 2898 | BOOL ok = TRUE; /* to deliver this address */ |
| 2899 | uschar *retry_key; |
| 2900 | |
| 2901 | /* Set up the retry key to include the domain or not, and change its |
| 2902 | leading character from "R" to "T". Must make a copy before doing this, |
| 2903 | because the old key may be pointed to from a "delete" retry item after |
| 2904 | a routing delay. */ |
| 2905 | |
| 2906 | retry_key = string_copy( |
| 2907 | tp->retry_use_local_part ? addr2->address_retry_key : |
| 2908 | addr2->domain_retry_key); |
| 2909 | *retry_key = 'T'; |
| 2910 | |
| 2911 | /* Inspect the retry data. If there is no hints file, delivery happens. */ |
| 2912 | |
| 2913 | if (dbm_file) |
| 2914 | { |
| 2915 | dbdata_retry *retry_record = dbfn_read(dbm_file, retry_key); |
| 2916 | |
| 2917 | /* If there is no retry record, delivery happens. If there is, |
| 2918 | remember it exists so it can be deleted after a successful delivery. */ |
| 2919 | |
| 2920 | if (retry_record) |
| 2921 | { |
| 2922 | setflag(addr2, af_lt_retry_exists); |
| 2923 | |
| 2924 | /* A retry record exists for this address. If queue running and not |
| 2925 | forcing, inspect its contents. If the record is too old, or if its |
| 2926 | retry time has come, or if it has passed its cutoff time, delivery |
| 2927 | will go ahead. */ |
| 2928 | |
| 2929 | DEBUG(D_retry) |
| 2930 | { |
| 2931 | debug_printf("retry record exists: age=%s ", |
| 2932 | readconf_printtime(now - retry_record->time_stamp)); |
| 2933 | debug_printf("(max %s)\n", readconf_printtime(retry_data_expire)); |
| 2934 | debug_printf(" time to retry = %s expired = %d\n", |
| 2935 | readconf_printtime(retry_record->next_try - now), |
| 2936 | retry_record->expired); |
| 2937 | } |
| 2938 | |
| 2939 | if (f.queue_running && !f.deliver_force) |
| 2940 | { |
| 2941 | ok = (now - retry_record->time_stamp > retry_data_expire) |
| 2942 | || (now >= retry_record->next_try) |
| 2943 | || retry_record->expired; |
| 2944 | |
| 2945 | /* If we haven't reached the retry time, there is one more check |
| 2946 | to do, which is for the ultimate address timeout. */ |
| 2947 | |
| 2948 | if (!ok) |
| 2949 | ok = retry_ultimate_address_timeout(retry_key, addr2->domain, |
| 2950 | retry_record, now); |
| 2951 | } |
| 2952 | } |
| 2953 | else DEBUG(D_retry) debug_printf("no retry record exists\n"); |
| 2954 | } |
| 2955 | |
| 2956 | /* This address is to be delivered. Leave it on the chain. */ |
| 2957 | |
| 2958 | if (ok) |
| 2959 | { |
| 2960 | addr3 = addr2; |
| 2961 | addr2 = addr2->next; |
| 2962 | } |
| 2963 | |
| 2964 | /* This address is to be deferred. Take it out of the chain, and |
| 2965 | post-process it as complete. Must take it out of the chain first, |
| 2966 | because post processing puts it on another chain. */ |
| 2967 | |
| 2968 | else |
| 2969 | { |
| 2970 | address_item *this = addr2; |
| 2971 | this->message = US"Retry time not yet reached"; |
| 2972 | this->basic_errno = ERRNO_LRETRY; |
| 2973 | addr2 = addr3 ? (addr3->next = addr2->next) |
| 2974 | : (addr = addr2->next); |
| 2975 | post_process_one(this, DEFER, logflags, EXIM_DTYPE_TRANSPORT, 0); |
| 2976 | } |
| 2977 | } |
| 2978 | |
| 2979 | if (dbm_file) dbfn_close(dbm_file); |
| 2980 | |
| 2981 | /* If there are no addresses left on the chain, they all deferred. Loop |
| 2982 | for the next set of addresses. */ |
| 2983 | |
| 2984 | if (!addr) continue; |
| 2985 | |
| 2986 | /* If the transport is limited for parallellism, enforce that here. |
| 2987 | We use a hints DB entry, incremented here and decremented after |
| 2988 | the transport (and any shadow transport) completes. */ |
| 2989 | |
| 2990 | if (tpt_parallel_check(tp, addr, &serialize_key)) |
| 2991 | { |
| 2992 | if (expand_string_message) |
| 2993 | { |
| 2994 | logflags |= LOG_PANIC; |
| 2995 | do |
| 2996 | { |
| 2997 | addr = addr->next; |
| 2998 | post_process_one(addr, DEFER, logflags, EXIM_DTYPE_TRANSPORT, 0); |
| 2999 | } while ((addr = addr2)); |
| 3000 | } |
| 3001 | continue; /* Loop for the next set of addresses. */ |
| 3002 | } |
| 3003 | |
| 3004 | |
| 3005 | /* So, finally, we do have some addresses that can be passed to the |
| 3006 | transport. Before doing so, set up variables that are relevant to a |
| 3007 | single delivery. */ |
| 3008 | |
| 3009 | deliver_set_expansions(addr); |
| 3010 | |
| 3011 | gettimeofday(&delivery_start, NULL); |
| 3012 | deliver_local(addr, FALSE); |
| 3013 | timesince(&deliver_time, &delivery_start); |
| 3014 | |
| 3015 | /* If a shadow transport (which must perforce be another local transport), is |
| 3016 | defined, and its condition is met, we must pass the message to the shadow |
| 3017 | too, but only those addresses that succeeded. We do this by making a new |
| 3018 | chain of addresses - also to keep the original chain uncontaminated. We must |
| 3019 | use a chain rather than doing it one by one, because the shadow transport may |
| 3020 | batch. |
| 3021 | |
| 3022 | NOTE: if the condition fails because of a lookup defer, there is nothing we |
| 3023 | can do! */ |
| 3024 | |
| 3025 | if ( tp->shadow |
| 3026 | && ( !tp->shadow_condition |
| 3027 | || expand_check_condition(tp->shadow_condition, tp->name, US"transport") |
| 3028 | ) ) |
| 3029 | { |
| 3030 | transport_instance *stp; |
| 3031 | address_item *shadow_addr = NULL; |
| 3032 | address_item **last = &shadow_addr; |
| 3033 | |
| 3034 | for (stp = transports; stp; stp = stp->next) |
| 3035 | if (Ustrcmp(stp->name, tp->shadow) == 0) break; |
| 3036 | |
| 3037 | if (!stp) |
| 3038 | log_write(0, LOG_MAIN|LOG_PANIC, "shadow transport \"%s\" not found ", |
| 3039 | tp->shadow); |
| 3040 | |
| 3041 | /* Pick off the addresses that have succeeded, and make clones. Put into |
| 3042 | the shadow_message field a pointer to the shadow_message field of the real |
| 3043 | address. */ |
| 3044 | |
| 3045 | else for (addr2 = addr; addr2; addr2 = addr2->next) |
| 3046 | if (addr2->transport_return == OK) |
| 3047 | { |
| 3048 | addr3 = store_get(sizeof(address_item), FALSE); |
| 3049 | *addr3 = *addr2; |
| 3050 | addr3->next = NULL; |
| 3051 | addr3->shadow_message = US &addr2->shadow_message; |
| 3052 | addr3->transport = stp; |
| 3053 | addr3->transport_return = DEFER; |
| 3054 | addr3->return_filename = NULL; |
| 3055 | addr3->return_file = -1; |
| 3056 | *last = addr3; |
| 3057 | last = &addr3->next; |
| 3058 | } |
| 3059 | |
| 3060 | /* If we found any addresses to shadow, run the delivery, and stick any |
| 3061 | message back into the shadow_message field in the original. */ |
| 3062 | |
| 3063 | if (shadow_addr) |
| 3064 | { |
| 3065 | int save_count = transport_count; |
| 3066 | |
| 3067 | DEBUG(D_deliver|D_transport) |
| 3068 | debug_printf(">>>>>>>>>>>>>>>> Shadow delivery >>>>>>>>>>>>>>>>\n"); |
| 3069 | deliver_local(shadow_addr, TRUE); |
| 3070 | |
| 3071 | for(; shadow_addr; shadow_addr = shadow_addr->next) |
| 3072 | { |
| 3073 | int sresult = shadow_addr->transport_return; |
| 3074 | *(uschar **)shadow_addr->shadow_message = |
| 3075 | sresult == OK |
| 3076 | ? string_sprintf(" ST=%s", stp->name) |
| 3077 | : string_sprintf(" ST=%s (%s%s%s)", stp->name, |
| 3078 | shadow_addr->basic_errno <= 0 |
| 3079 | ? US"" |
| 3080 | : US strerror(shadow_addr->basic_errno), |
| 3081 | shadow_addr->basic_errno <= 0 || !shadow_addr->message |
| 3082 | ? US"" |
| 3083 | : US": ", |
| 3084 | shadow_addr->message |
| 3085 | ? shadow_addr->message |
| 3086 | : shadow_addr->basic_errno <= 0 |
| 3087 | ? US"unknown error" |
| 3088 | : US""); |
| 3089 | |
| 3090 | DEBUG(D_deliver|D_transport) |
| 3091 | debug_printf("%s shadow transport returned %s for %s\n", |
| 3092 | stp->name, rc_to_string(sresult), shadow_addr->address); |
| 3093 | } |
| 3094 | |
| 3095 | DEBUG(D_deliver|D_transport) |
| 3096 | debug_printf(">>>>>>>>>>>>>>>> End shadow delivery >>>>>>>>>>>>>>>>\n"); |
| 3097 | |
| 3098 | transport_count = save_count; /* Restore original transport count */ |
| 3099 | } |
| 3100 | } |
| 3101 | |
| 3102 | /* Cancel the expansions that were set up for the delivery. */ |
| 3103 | |
| 3104 | deliver_set_expansions(NULL); |
| 3105 | |
| 3106 | /* If the transport was parallelism-limited, decrement the hints DB record. */ |
| 3107 | |
| 3108 | if (serialize_key) enq_end(serialize_key); |
| 3109 | |
| 3110 | /* Now we can process the results of the real transport. We must take each |
| 3111 | address off the chain first, because post_process_one() puts it on another |
| 3112 | chain. */ |
| 3113 | |
| 3114 | for (addr2 = addr; addr2; addr2 = nextaddr) |
| 3115 | { |
| 3116 | int result = addr2->transport_return; |
| 3117 | nextaddr = addr2->next; |
| 3118 | |
| 3119 | DEBUG(D_deliver|D_transport) |
| 3120 | debug_printf("%s transport returned %s for %s\n", |
| 3121 | tp->name, rc_to_string(result), addr2->address); |
| 3122 | |
| 3123 | /* If there is a retry_record, or if delivery is deferred, build a retry |
| 3124 | item for setting a new retry time or deleting the old retry record from |
| 3125 | the database. These items are handled all together after all addresses |
| 3126 | have been handled (so the database is open just for a short time for |
| 3127 | updating). */ |
| 3128 | |
| 3129 | if (result == DEFER || testflag(addr2, af_lt_retry_exists)) |
| 3130 | { |
| 3131 | int flags = result == DEFER ? 0 : rf_delete; |
| 3132 | uschar *retry_key = string_copy(tp->retry_use_local_part |
| 3133 | ? addr2->address_retry_key : addr2->domain_retry_key); |
| 3134 | *retry_key = 'T'; |
| 3135 | retry_add_item(addr2, retry_key, flags); |
| 3136 | } |
| 3137 | |
| 3138 | /* Done with this address */ |
| 3139 | |
| 3140 | addr2->delivery_time = deliver_time; |
| 3141 | post_process_one(addr2, result, logflags, EXIM_DTYPE_TRANSPORT, logchar); |
| 3142 | |
| 3143 | /* If a pipe delivery generated text to be sent back, the result may be |
| 3144 | changed to FAIL, and we must copy this for subsequent addresses in the |
| 3145 | batch. */ |
| 3146 | |
| 3147 | if (addr2->transport_return != result) |
| 3148 | { |
| 3149 | for (addr3 = nextaddr; addr3; addr3 = addr3->next) |
| 3150 | { |
| 3151 | addr3->transport_return = addr2->transport_return; |
| 3152 | addr3->basic_errno = addr2->basic_errno; |
| 3153 | addr3->message = addr2->message; |
| 3154 | } |
| 3155 | result = addr2->transport_return; |
| 3156 | } |
| 3157 | |
| 3158 | /* Whether or not the result was changed to FAIL, we need to copy the |
| 3159 | return_file value from the first address into all the addresses of the |
| 3160 | batch, so they are all listed in the error message. */ |
| 3161 | |
| 3162 | addr2->return_file = addr->return_file; |
| 3163 | |
| 3164 | /* Change log character for recording successful deliveries. */ |
| 3165 | |
| 3166 | if (result == OK) logchar = '-'; |
| 3167 | } |
| 3168 | } /* Loop back for next batch of addresses */ |
| 3169 | } |
| 3170 | |
| 3171 | |
| 3172 | |
| 3173 | |
| 3174 | /************************************************* |
| 3175 | * Sort remote deliveries * |
| 3176 | *************************************************/ |
| 3177 | |
| 3178 | /* This function is called if remote_sort_domains is set. It arranges that the |
| 3179 | chain of addresses for remote deliveries is ordered according to the strings |
| 3180 | specified. Try to make this shuffling reasonably efficient by handling |
| 3181 | sequences of addresses rather than just single ones. |
| 3182 | |
| 3183 | Arguments: None |
| 3184 | Returns: Nothing |
| 3185 | */ |
| 3186 | |
| 3187 | static void |
| 3188 | sort_remote_deliveries(void) |
| 3189 | { |
| 3190 | int sep = 0; |
| 3191 | address_item **aptr = &addr_remote; |
| 3192 | const uschar *listptr = remote_sort_domains; |
| 3193 | uschar *pattern; |
| 3194 | uschar patbuf[256]; |
| 3195 | |
| 3196 | while ( *aptr |
| 3197 | && (pattern = string_nextinlist(&listptr, &sep, patbuf, sizeof(patbuf))) |
| 3198 | ) |
| 3199 | { |
| 3200 | address_item *moved = NULL; |
| 3201 | address_item **bptr = &moved; |
| 3202 | |
| 3203 | while (*aptr) |
| 3204 | { |
| 3205 | address_item **next; |
| 3206 | deliver_domain = (*aptr)->domain; /* set $domain */ |
| 3207 | if (match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1, |
| 3208 | &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK) |
| 3209 | { |
| 3210 | aptr = &(*aptr)->next; |
| 3211 | continue; |
| 3212 | } |
| 3213 | |
| 3214 | next = &(*aptr)->next; |
| 3215 | while ( *next |
| 3216 | && (deliver_domain = (*next)->domain, /* Set $domain */ |
| 3217 | match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1, |
| 3218 | &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL)) != OK |
| 3219 | ) |
| 3220 | next = &(*next)->next; |
| 3221 | |
| 3222 | /* If the batch of non-matchers is at the end, add on any that were |
| 3223 | extracted further up the chain, and end this iteration. Otherwise, |
| 3224 | extract them from the chain and hang on the moved chain. */ |
| 3225 | |
| 3226 | if (!*next) |
| 3227 | { |
| 3228 | *next = moved; |
| 3229 | break; |
| 3230 | } |
| 3231 | |
| 3232 | *bptr = *aptr; |
| 3233 | *aptr = *next; |
| 3234 | *next = NULL; |
| 3235 | bptr = next; |
| 3236 | aptr = &(*aptr)->next; |
| 3237 | } |
| 3238 | |
| 3239 | /* If the loop ended because the final address matched, *aptr will |
| 3240 | be NULL. Add on to the end any extracted non-matching addresses. If |
| 3241 | *aptr is not NULL, the loop ended via "break" when *next is null, that |
| 3242 | is, there was a string of non-matching addresses at the end. In this |
| 3243 | case the extracted addresses have already been added on the end. */ |
| 3244 | |
| 3245 | if (!*aptr) *aptr = moved; |
| 3246 | } |
| 3247 | |
| 3248 | DEBUG(D_deliver) |
| 3249 | { |
| 3250 | debug_printf("remote addresses after sorting:\n"); |
| 3251 | for (address_item * addr = addr_remote; addr; addr = addr->next) |
| 3252 | debug_printf(" %s\n", addr->address); |
| 3253 | } |
| 3254 | } |
| 3255 | |
| 3256 | |
| 3257 | |
| 3258 | /************************************************* |
| 3259 | * Read from pipe for remote delivery subprocess * |
| 3260 | *************************************************/ |
| 3261 | |
| 3262 | /* This function is called when the subprocess is complete, but can also be |
| 3263 | called before it is complete, in order to empty a pipe that is full (to prevent |
| 3264 | deadlock). It must therefore keep track of its progress in the parlist data |
| 3265 | block. |
| 3266 | |
| 3267 | We read the pipe to get the delivery status codes and a possible error message |
| 3268 | for each address, optionally preceded by unusability data for the hosts and |
| 3269 | also by optional retry data. |
| 3270 | |
| 3271 | Read in large chunks into the big buffer and then scan through, interpreting |
| 3272 | the data therein. In most cases, only a single read will be necessary. No |
| 3273 | individual item will ever be anywhere near 2500 bytes in length, so by ensuring |
| 3274 | that we read the next chunk when there is less than 2500 bytes left in the |
| 3275 | non-final chunk, we can assume each item is complete in the buffer before |
| 3276 | handling it. Each item is written using a single write(), which is atomic for |
| 3277 | small items (less than PIPE_BUF, which seems to be at least 512 in any Unix and |
| 3278 | often bigger) so even if we are reading while the subprocess is still going, we |
| 3279 | should never have only a partial item in the buffer. |
| 3280 | |
| 3281 | hs12: This assumption is not true anymore, since we get quite large items (certificate |
| 3282 | information and such). |
| 3283 | |
| 3284 | Argument: |
| 3285 | poffset the offset of the parlist item |
| 3286 | eop TRUE if the process has completed |
| 3287 | |
| 3288 | Returns: TRUE if the terminating 'Z' item has been read, |
| 3289 | or there has been a disaster (i.e. no more data needed); |
| 3290 | FALSE otherwise |
| 3291 | */ |
| 3292 | |
| 3293 | static BOOL |
| 3294 | par_read_pipe(int poffset, BOOL eop) |
| 3295 | { |
| 3296 | host_item *h; |
| 3297 | pardata *p = parlist + poffset; |
| 3298 | address_item *addrlist = p->addrlist; |
| 3299 | address_item *addr = p->addr; |
| 3300 | pid_t pid = p->pid; |
| 3301 | int fd = p->fd; |
| 3302 | |
| 3303 | uschar *msg = p->msg; |
| 3304 | BOOL done = p->done; |
| 3305 | |
| 3306 | /* Loop through all items, reading from the pipe when necessary. The pipe |
| 3307 | used to be non-blocking. But I do not see a reason for using non-blocking I/O |
| 3308 | here, as the preceding select() tells us, if data is available for reading. |
| 3309 | |
| 3310 | A read() on a "selected" handle should never block, but(!) it may return |
| 3311 | less data then we expected. (The buffer size we pass to read() shouldn't be |
| 3312 | understood as a "request", but as a "limit".) |
| 3313 | |
| 3314 | Each separate item is written to the pipe in a timely manner. But, especially for |
| 3315 | larger items, the read(2) may already return partial data from the write(2). |
| 3316 | |
| 3317 | The write is atomic mostly (depending on the amount written), but atomic does |
| 3318 | not imply "all or noting", it just is "not intermixed" with other writes on the |
| 3319 | same channel (pipe). |
| 3320 | |
| 3321 | */ |
| 3322 | |
| 3323 | DEBUG(D_deliver) debug_printf("reading pipe for subprocess %d (%s)\n", |
| 3324 | (int)p->pid, eop? "ended" : "not ended yet"); |
| 3325 | |
| 3326 | while (!done) |
| 3327 | { |
| 3328 | retry_item *r, **rp; |
| 3329 | uschar pipeheader[PIPE_HEADER_SIZE+1]; |
| 3330 | uschar *id = &pipeheader[0]; |
| 3331 | uschar *subid = &pipeheader[1]; |
| 3332 | uschar *ptr = big_buffer; |
| 3333 | size_t required = PIPE_HEADER_SIZE; /* first the pipehaeder, later the data */ |
| 3334 | ssize_t got; |
| 3335 | |
| 3336 | DEBUG(D_deliver) debug_printf( |
| 3337 | "expect %lu bytes (pipeheader) from tpt process %d\n", (u_long)required, pid); |
| 3338 | |
| 3339 | /* We require(!) all the PIPE_HEADER_SIZE bytes here, as we know, |
| 3340 | they're written in a timely manner, so waiting for the write shouldn't hurt a lot. |
| 3341 | If we get less, we can assume the subprocess do be done and do not expect any further |
| 3342 | information from it. */ |
| 3343 | |
| 3344 | if ((got = readn(fd, pipeheader, required)) != required) |
| 3345 | { |
| 3346 | msg = string_sprintf("got " SSIZE_T_FMT " of %d bytes (pipeheader) " |
| 3347 | "from transport process %d for transport %s", |
| 3348 | got, PIPE_HEADER_SIZE, pid, addr->transport->driver_name); |
| 3349 | done = TRUE; |
| 3350 | break; |
| 3351 | } |
| 3352 | |
| 3353 | pipeheader[PIPE_HEADER_SIZE] = '\0'; |
| 3354 | DEBUG(D_deliver) |
| 3355 | debug_printf("got %ld bytes (pipeheader) from transport process %d\n", |
| 3356 | (long) got, pid); |
| 3357 | |
| 3358 | { |
| 3359 | /* If we can't decode the pipeheader, the subprocess seems to have a |
| 3360 | problem, we do not expect any furher information from it. */ |
| 3361 | char *endc; |
| 3362 | required = Ustrtol(pipeheader+2, &endc, 10); |
| 3363 | if (*endc) |
| 3364 | { |
| 3365 | msg = string_sprintf("failed to read pipe " |
| 3366 | "from transport process %d for transport %s: error decoding size from header", |
| 3367 | pid, addr->transport->driver_name); |
| 3368 | done = TRUE; |
| 3369 | break; |
| 3370 | } |
| 3371 | } |
| 3372 | |
| 3373 | DEBUG(D_deliver) |
| 3374 | debug_printf("expect %lu bytes (pipedata) from transport process %d\n", |
| 3375 | (u_long)required, pid); |
| 3376 | |
| 3377 | /* Same as above, the transport process will write the bytes announced |
| 3378 | in a timely manner, so we can just wait for the bytes, getting less than expected |
| 3379 | is considered a problem of the subprocess, we do not expect anything else from it. */ |
| 3380 | if ((got = readn(fd, big_buffer, required)) != required) |
| 3381 | { |
| 3382 | msg = string_sprintf("got only " SSIZE_T_FMT " of " SIZE_T_FMT |
| 3383 | " bytes (pipedata) from transport process %d for transport %s", |
| 3384 | got, required, pid, addr->transport->driver_name); |
| 3385 | done = TRUE; |
| 3386 | break; |
| 3387 | } |
| 3388 | |
| 3389 | /* Handle each possible type of item, assuming the complete item is |
| 3390 | available in store. */ |
| 3391 | |
| 3392 | switch (*id) |
| 3393 | { |
| 3394 | /* Host items exist only if any hosts were marked unusable. Match |
| 3395 | up by checking the IP address. */ |
| 3396 | |
| 3397 | case 'H': |
| 3398 | for (h = addrlist->host_list; h; h = h->next) |
| 3399 | { |
| 3400 | if (!h->address || Ustrcmp(h->address, ptr+2) != 0) continue; |
| 3401 | h->status = ptr[0]; |
| 3402 | h->why = ptr[1]; |
| 3403 | } |
| 3404 | ptr += 2; |
| 3405 | while (*ptr++); |
| 3406 | break; |
| 3407 | |
| 3408 | /* Retry items are sent in a preceding R item for each address. This is |
| 3409 | kept separate to keep each message short enough to guarantee it won't |
| 3410 | be split in the pipe. Hopefully, in the majority of cases, there won't in |
| 3411 | fact be any retry items at all. |
| 3412 | |
| 3413 | The complete set of retry items might include an item to delete a |
| 3414 | routing retry if there was a previous routing delay. However, routing |
| 3415 | retries are also used when a remote transport identifies an address error. |
| 3416 | In that case, there may also be an "add" item for the same key. Arrange |
| 3417 | that a "delete" item is dropped in favour of an "add" item. */ |
| 3418 | |
| 3419 | case 'R': |
| 3420 | if (!addr) goto ADDR_MISMATCH; |
| 3421 | |
| 3422 | DEBUG(D_deliver|D_retry) |
| 3423 | debug_printf("reading retry information for %s from subprocess\n", |
| 3424 | ptr+1); |
| 3425 | |
| 3426 | /* Cut out any "delete" items on the list. */ |
| 3427 | |
| 3428 | for (rp = &addr->retries; (r = *rp); rp = &r->next) |
| 3429 | if (Ustrcmp(r->key, ptr+1) == 0) /* Found item with same key */ |
| 3430 | { |
| 3431 | if (!(r->flags & rf_delete)) break; /* It was not "delete" */ |
| 3432 | *rp = r->next; /* Excise a delete item */ |
| 3433 | DEBUG(D_deliver|D_retry) |
| 3434 | debug_printf(" existing delete item dropped\n"); |
| 3435 | } |
| 3436 | |
| 3437 | /* We want to add a delete item only if there is no non-delete item; |
| 3438 | however we still have to step ptr through the data. */ |
| 3439 | |
| 3440 | if (!r || !(*ptr & rf_delete)) |
| 3441 | { |
| 3442 | r = store_get(sizeof(retry_item), FALSE); |
| 3443 | r->next = addr->retries; |
| 3444 | addr->retries = r; |
| 3445 | r->flags = *ptr++; |
| 3446 | r->key = string_copy(ptr); |
| 3447 | while (*ptr++); |
| 3448 | memcpy(&r->basic_errno, ptr, sizeof(r->basic_errno)); |
| 3449 | ptr += sizeof(r->basic_errno); |
| 3450 | memcpy(&r->more_errno, ptr, sizeof(r->more_errno)); |
| 3451 | ptr += sizeof(r->more_errno); |
| 3452 | r->message = *ptr ? string_copy(ptr) : NULL; |
| 3453 | DEBUG(D_deliver|D_retry) debug_printf(" added %s item\n", |
| 3454 | r->flags & rf_delete ? "delete" : "retry"); |
| 3455 | } |
| 3456 | |
| 3457 | else |
| 3458 | { |
| 3459 | DEBUG(D_deliver|D_retry) |
| 3460 | debug_printf(" delete item not added: non-delete item exists\n"); |
| 3461 | ptr++; |
| 3462 | while(*ptr++); |
| 3463 | ptr += sizeof(r->basic_errno) + sizeof(r->more_errno); |
| 3464 | } |
| 3465 | |
| 3466 | while(*ptr++); |
| 3467 | break; |
| 3468 | |
| 3469 | /* Put the amount of data written into the parlist block */ |
| 3470 | |
| 3471 | case 'S': |
| 3472 | memcpy(&(p->transport_count), ptr, sizeof(transport_count)); |
| 3473 | ptr += sizeof(transport_count); |
| 3474 | break; |
| 3475 | |
| 3476 | /* Address items are in the order of items on the address chain. We |
| 3477 | remember the current address value in case this function is called |
| 3478 | several times to empty the pipe in stages. Information about delivery |
| 3479 | over TLS is sent in a preceding X item for each address. We don't put |
| 3480 | it in with the other info, in order to keep each message short enough to |
| 3481 | guarantee it won't be split in the pipe. */ |
| 3482 | |
| 3483 | #ifndef DISABLE_TLS |
| 3484 | case 'X': |
| 3485 | if (!addr) goto ADDR_MISMATCH; /* Below, in 'A' handler */ |
| 3486 | switch (*subid) |
| 3487 | { |
| 3488 | case '1': |
| 3489 | addr->tlsver = addr->cipher = addr->peerdn = NULL; |
| 3490 | |
| 3491 | if (*ptr) |
| 3492 | { |
| 3493 | addr->cipher = string_copy(ptr); |
| 3494 | addr->tlsver = string_copyn(ptr, Ustrchr(ptr, ':') - ptr); |
| 3495 | } |
| 3496 | while (*ptr++); |
| 3497 | if (*ptr) |
| 3498 | addr->peerdn = string_copy(ptr); |
| 3499 | break; |
| 3500 | |
| 3501 | case '2': |
| 3502 | if (*ptr) |
| 3503 | (void) tls_import_cert(ptr, &addr->peercert); |
| 3504 | else |
| 3505 | addr->peercert = NULL; |
| 3506 | break; |
| 3507 | |
| 3508 | case '3': |
| 3509 | if (*ptr) |
| 3510 | (void) tls_import_cert(ptr, &addr->ourcert); |
| 3511 | else |
| 3512 | addr->ourcert = NULL; |
| 3513 | break; |
| 3514 | |
| 3515 | # ifndef DISABLE_OCSP |
| 3516 | case '4': |
| 3517 | addr->ocsp = *ptr ? *ptr - '0' : OCSP_NOT_REQ; |
| 3518 | break; |
| 3519 | # endif |
| 3520 | } |
| 3521 | while (*ptr++); |
| 3522 | break; |
| 3523 | #endif /*DISABLE_TLS*/ |
| 3524 | |
| 3525 | case 'C': /* client authenticator information */ |
| 3526 | switch (*subid) |
| 3527 | { |
| 3528 | case '1': addr->authenticator = *ptr ? string_copy(ptr) : NULL; break; |
| 3529 | case '2': addr->auth_id = *ptr ? string_copy(ptr) : NULL; break; |
| 3530 | case '3': addr->auth_sndr = *ptr ? string_copy(ptr) : NULL; break; |
| 3531 | } |
| 3532 | while (*ptr++); |
| 3533 | break; |
| 3534 | |
| 3535 | #ifndef DISABLE_PRDR |
| 3536 | case 'P': |
| 3537 | setflag(addr, af_prdr_used); |
| 3538 | break; |
| 3539 | #endif |
| 3540 | |
| 3541 | case 'L': |
| 3542 | switch (*subid) |
| 3543 | { |
| 3544 | #ifndef DISABLE_PIPE_CONNECT |
| 3545 | case 2: setflag(addr, af_early_pipe); /*FALLTHROUGH*/ |
| 3546 | #endif |
| 3547 | case 1: setflag(addr, af_pipelining); break; |
| 3548 | } |
| 3549 | break; |
| 3550 | |
| 3551 | case 'K': |
| 3552 | setflag(addr, af_chunking_used); |
| 3553 | break; |
| 3554 | |
| 3555 | case 'T': |
| 3556 | setflag(addr, af_tcp_fastopen_conn); |
| 3557 | if (*subid > '0') setflag(addr, af_tcp_fastopen); |
| 3558 | if (*subid > '1') setflag(addr, af_tcp_fastopen_data); |
| 3559 | break; |
| 3560 | |
| 3561 | case 'D': |
| 3562 | if (!addr) goto ADDR_MISMATCH; |
| 3563 | memcpy(&(addr->dsn_aware), ptr, sizeof(addr->dsn_aware)); |
| 3564 | ptr += sizeof(addr->dsn_aware); |
| 3565 | DEBUG(D_deliver) debug_printf("DSN read: addr->dsn_aware = %d\n", addr->dsn_aware); |
| 3566 | break; |
| 3567 | |
| 3568 | case 'A': |
| 3569 | if (!addr) |
| 3570 | { |
| 3571 | ADDR_MISMATCH: |
| 3572 | msg = string_sprintf("address count mismatch for data read from pipe " |
| 3573 | "for transport process %d for transport %s", pid, |
| 3574 | addrlist->transport->driver_name); |
| 3575 | done = TRUE; |
| 3576 | break; |
| 3577 | } |
| 3578 | |
| 3579 | switch (*subid) |
| 3580 | { |
| 3581 | #ifdef SUPPORT_SOCKS |
| 3582 | case '2': /* proxy information; must arrive before A0 and applies to that addr XXX oops*/ |
| 3583 | proxy_session = TRUE; /*XXX should this be cleared somewhere? */ |
| 3584 | if (*ptr == 0) |
| 3585 | ptr++; |
| 3586 | else |
| 3587 | { |
| 3588 | proxy_local_address = string_copy(ptr); |
| 3589 | while(*ptr++); |
| 3590 | memcpy(&proxy_local_port, ptr, sizeof(proxy_local_port)); |
| 3591 | ptr += sizeof(proxy_local_port); |
| 3592 | } |
| 3593 | break; |
| 3594 | #endif |
| 3595 | |
| 3596 | #ifdef EXPERIMENTAL_DSN_INFO |
| 3597 | case '1': /* must arrive before A0, and applies to that addr */ |
| 3598 | /* Two strings: smtp_greeting and helo_response */ |
| 3599 | addr->smtp_greeting = string_copy(ptr); |
| 3600 | while(*ptr++); |
| 3601 | addr->helo_response = string_copy(ptr); |
| 3602 | while(*ptr++); |
| 3603 | break; |
| 3604 | #endif |
| 3605 | |
| 3606 | case '0': |
| 3607 | DEBUG(D_deliver) debug_printf("A0 %s tret %d\n", addr->address, *ptr); |
| 3608 | addr->transport_return = *ptr++; |
| 3609 | addr->special_action = *ptr++; |
| 3610 | memcpy(&addr->basic_errno, ptr, sizeof(addr->basic_errno)); |
| 3611 | ptr += sizeof(addr->basic_errno); |
| 3612 | memcpy(&addr->more_errno, ptr, sizeof(addr->more_errno)); |
| 3613 | ptr += sizeof(addr->more_errno); |
| 3614 | memcpy(&addr->delivery_time, ptr, sizeof(addr->delivery_time)); |
| 3615 | ptr += sizeof(addr->delivery_time); |
| 3616 | memcpy(&addr->flags, ptr, sizeof(addr->flags)); |
| 3617 | ptr += sizeof(addr->flags); |
| 3618 | addr->message = *ptr ? string_copy(ptr) : NULL; |
| 3619 | while(*ptr++); |
| 3620 | addr->user_message = *ptr ? string_copy(ptr) : NULL; |
| 3621 | while(*ptr++); |
| 3622 | |
| 3623 | /* Always two strings for host information, followed by the port number and DNSSEC mark */ |
| 3624 | |
| 3625 | if (*ptr) |
| 3626 | { |
| 3627 | h = store_get(sizeof(host_item), FALSE); |
| 3628 | h->name = string_copy(ptr); |
| 3629 | while (*ptr++); |
| 3630 | h->address = string_copy(ptr); |
| 3631 | while(*ptr++); |
| 3632 | memcpy(&h->port, ptr, sizeof(h->port)); |
| 3633 | ptr += sizeof(h->port); |
| 3634 | h->dnssec = *ptr == '2' ? DS_YES |
| 3635 | : *ptr == '1' ? DS_NO |
| 3636 | : DS_UNK; |
| 3637 | ptr++; |
| 3638 | addr->host_used = h; |
| 3639 | } |
| 3640 | else ptr++; |
| 3641 | |
| 3642 | /* Finished with this address */ |
| 3643 | |
| 3644 | addr = addr->next; |
| 3645 | break; |
| 3646 | } |
| 3647 | break; |
| 3648 | |
| 3649 | /* Local interface address/port */ |
| 3650 | case 'I': |
| 3651 | if (*ptr) sending_ip_address = string_copy(ptr); |
| 3652 | while (*ptr++) ; |
| 3653 | if (*ptr) sending_port = atoi(CS ptr); |
| 3654 | while (*ptr++) ; |
| 3655 | break; |
| 3656 | |
| 3657 | /* Z marks the logical end of the data. It is followed by '0' if |
| 3658 | continue_transport was NULL at the end of transporting, otherwise '1'. |
| 3659 | We need to know when it becomes NULL during a delivery down a passed SMTP |
| 3660 | channel so that we don't try to pass anything more down it. Of course, for |
| 3661 | most normal messages it will remain NULL all the time. */ |
| 3662 | |
| 3663 | case 'Z': |
| 3664 | if (*ptr == '0') |
| 3665 | { |
| 3666 | continue_transport = NULL; |
| 3667 | continue_hostname = NULL; |
| 3668 | } |
| 3669 | done = TRUE; |
| 3670 | DEBUG(D_deliver) debug_printf("Z0%c item read\n", *ptr); |
| 3671 | break; |
| 3672 | |
| 3673 | /* Anything else is a disaster. */ |
| 3674 | |
| 3675 | default: |
| 3676 | msg = string_sprintf("malformed data (%d) read from pipe for transport " |
| 3677 | "process %d for transport %s", ptr[-1], pid, |
| 3678 | addr->transport->driver_name); |
| 3679 | done = TRUE; |
| 3680 | break; |
| 3681 | } |
| 3682 | } |
| 3683 | |
| 3684 | /* The done flag is inspected externally, to determine whether or not to |
| 3685 | call the function again when the process finishes. */ |
| 3686 | |
| 3687 | p->done = done; |
| 3688 | |
| 3689 | /* If the process hadn't finished, and we haven't seen the end of the data |
| 3690 | or if we suffered a disaster, update the rest of the state, and return FALSE to |
| 3691 | indicate "not finished". */ |
| 3692 | |
| 3693 | if (!eop && !done) |
| 3694 | { |
| 3695 | p->addr = addr; |
| 3696 | p->msg = msg; |
| 3697 | return FALSE; |
| 3698 | } |
| 3699 | |
| 3700 | /* Close our end of the pipe, to prevent deadlock if the far end is still |
| 3701 | pushing stuff into it. */ |
| 3702 | |
| 3703 | (void)close(fd); |
| 3704 | p->fd = -1; |
| 3705 | |
| 3706 | /* If we have finished without error, but haven't had data for every address, |
| 3707 | something is wrong. */ |
| 3708 | |
| 3709 | if (!msg && addr) |
| 3710 | msg = string_sprintf("insufficient address data read from pipe " |
| 3711 | "for transport process %d for transport %s", pid, |
| 3712 | addr->transport->driver_name); |
| 3713 | |
| 3714 | /* If an error message is set, something has gone wrong in getting back |
| 3715 | the delivery data. Put the message into each address and freeze it. */ |
| 3716 | |
| 3717 | if (msg) |
| 3718 | for (addr = addrlist; addr; addr = addr->next) |
| 3719 | { |
| 3720 | addr->transport_return = DEFER; |
| 3721 | addr->special_action = SPECIAL_FREEZE; |
| 3722 | addr->message = msg; |
| 3723 | log_write(0, LOG_MAIN|LOG_PANIC, "Delivery status for %s: %s\n", addr->address, addr->message); |
| 3724 | } |
| 3725 | |
| 3726 | /* Return TRUE to indicate we have got all we need from this process, even |
| 3727 | if it hasn't actually finished yet. */ |
| 3728 | |
| 3729 | return TRUE; |
| 3730 | } |
| 3731 | |
| 3732 | |
| 3733 | |
| 3734 | /************************************************* |
| 3735 | * Post-process a set of remote addresses * |
| 3736 | *************************************************/ |
| 3737 | |
| 3738 | /* Do what has to be done immediately after a remote delivery for each set of |
| 3739 | addresses, then re-write the spool if necessary. Note that post_process_one |
| 3740 | puts the address on an appropriate queue; hence we must fish off the next |
| 3741 | one first. This function is also called if there is a problem with setting |
| 3742 | up a subprocess to do a remote delivery in parallel. In this case, the final |
| 3743 | argument contains a message, and the action must be forced to DEFER. |
| 3744 | |
| 3745 | Argument: |
| 3746 | addr pointer to chain of address items |
| 3747 | logflags flags for logging |
| 3748 | msg NULL for normal cases; -> error message for unexpected problems |
| 3749 | fallback TRUE if processing fallback hosts |
| 3750 | |
| 3751 | Returns: nothing |
| 3752 | */ |
| 3753 | |
| 3754 | static void |
| 3755 | remote_post_process(address_item *addr, int logflags, uschar *msg, |
| 3756 | BOOL fallback) |
| 3757 | { |
| 3758 | /* If any host addresses were found to be unusable, add them to the unusable |
| 3759 | tree so that subsequent deliveries don't try them. */ |
| 3760 | |
| 3761 | for (host_item * h = addr->host_list; h; h = h->next) |
| 3762 | if (h->address) |
| 3763 | if (h->status >= hstatus_unusable) tree_add_unusable(h); |
| 3764 | |
| 3765 | /* Now handle each address on the chain. The transport has placed '=' or '-' |
| 3766 | into the special_action field for each successful delivery. */ |
| 3767 | |
| 3768 | while (addr) |
| 3769 | { |
| 3770 | address_item *next = addr->next; |
| 3771 | |
| 3772 | /* If msg == NULL (normal processing) and the result is DEFER and we are |
| 3773 | processing the main hosts and there are fallback hosts available, put the |
| 3774 | address on the list for fallback delivery. */ |
| 3775 | |
| 3776 | if ( addr->transport_return == DEFER |
| 3777 | && addr->fallback_hosts |
| 3778 | && !fallback |
| 3779 | && !msg |
| 3780 | ) |
| 3781 | { |
| 3782 | addr->host_list = addr->fallback_hosts; |
| 3783 | addr->next = addr_fallback; |
| 3784 | addr_fallback = addr; |
| 3785 | DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", addr->address); |
| 3786 | } |
| 3787 | |
| 3788 | /* If msg is set (=> unexpected problem), set it in the address before |
| 3789 | doing the ordinary post processing. */ |
| 3790 | |
| 3791 | else |
| 3792 | { |
| 3793 | if (msg) |
| 3794 | { |
| 3795 | addr->message = msg; |
| 3796 | addr->transport_return = DEFER; |
| 3797 | } |
| 3798 | (void)post_process_one(addr, addr->transport_return, logflags, |
| 3799 | EXIM_DTYPE_TRANSPORT, addr->special_action); |
| 3800 | } |
| 3801 | |
| 3802 | /* Next address */ |
| 3803 | |
| 3804 | addr = next; |
| 3805 | } |
| 3806 | |
| 3807 | /* If we have just delivered down a passed SMTP channel, and that was |
| 3808 | the last address, the channel will have been closed down. Now that |
| 3809 | we have logged that delivery, set continue_sequence to 1 so that |
| 3810 | any subsequent deliveries don't get "*" incorrectly logged. */ |
| 3811 | |
| 3812 | if (!continue_transport) continue_sequence = 1; |
| 3813 | } |
| 3814 | |
| 3815 | |
| 3816 | |
| 3817 | /************************************************* |
| 3818 | * Wait for one remote delivery subprocess * |
| 3819 | *************************************************/ |
| 3820 | |
| 3821 | /* This function is called while doing remote deliveries when either the |
| 3822 | maximum number of processes exist and we need one to complete so that another |
| 3823 | can be created, or when waiting for the last ones to complete. It must wait for |
| 3824 | the completion of one subprocess, empty the control block slot, and return a |
| 3825 | pointer to the address chain. |
| 3826 | |
| 3827 | Arguments: none |
| 3828 | Returns: pointer to the chain of addresses handled by the process; |
| 3829 | NULL if no subprocess found - this is an unexpected error |
| 3830 | */ |
| 3831 | |
| 3832 | static address_item * |
| 3833 | par_wait(void) |
| 3834 | { |
| 3835 | int poffset, status; |
| 3836 | address_item *addr, *addrlist; |
| 3837 | pid_t pid; |
| 3838 | |
| 3839 | set_process_info("delivering %s: waiting for a remote delivery subprocess " |
| 3840 | "to finish", message_id); |
| 3841 | |
| 3842 | /* Loop until either a subprocess completes, or there are no subprocesses in |
| 3843 | existence - in which case give an error return. We cannot proceed just by |
| 3844 | waiting for a completion, because a subprocess may have filled up its pipe, and |
| 3845 | be waiting for it to be emptied. Therefore, if no processes have finished, we |
| 3846 | wait for one of the pipes to acquire some data by calling select(), with a |
| 3847 | timeout just in case. |
| 3848 | |
| 3849 | The simple approach is just to iterate after reading data from a ready pipe. |
| 3850 | This leads to non-ideal behaviour when the subprocess has written its final Z |
| 3851 | item, closed the pipe, and is in the process of exiting (the common case). A |
| 3852 | call to waitpid() yields nothing completed, but select() shows the pipe ready - |
| 3853 | reading it yields EOF, so you end up with busy-waiting until the subprocess has |
| 3854 | actually finished. |
| 3855 | |
| 3856 | To avoid this, if all the data that is needed has been read from a subprocess |
| 3857 | after select(), an explicit wait() for it is done. We know that all it is doing |
| 3858 | is writing to the pipe and then exiting, so the wait should not be long. |
| 3859 | |
| 3860 | The non-blocking waitpid() is to some extent just insurance; if we could |
| 3861 | reliably detect end-of-file on the pipe, we could always know when to do a |
| 3862 | blocking wait() for a completed process. However, because some systems use |
| 3863 | NDELAY, which doesn't distinguish between EOF and pipe empty, it is easier to |
| 3864 | use code that functions without the need to recognize EOF. |
| 3865 | |
| 3866 | There's a double loop here just in case we end up with a process that is not in |
| 3867 | the list of remote delivery processes. Something has obviously gone wrong if |
| 3868 | this is the case. (For example, a process that is incorrectly left over from |
| 3869 | routing or local deliveries might be found.) The damage can be minimized by |
| 3870 | looping back and looking for another process. If there aren't any, the error |
| 3871 | return will happen. */ |
| 3872 | |
| 3873 | for (;;) /* Normally we do not repeat this loop */ |
| 3874 | { |
| 3875 | while ((pid = waitpid(-1, &status, WNOHANG)) <= 0) |
| 3876 | { |
| 3877 | struct timeval tv; |
| 3878 | fd_set select_pipes; |
| 3879 | int maxpipe, readycount; |
| 3880 | |
| 3881 | /* A return value of -1 can mean several things. If errno != ECHILD, it |
| 3882 | either means invalid options (which we discount), or that this process was |
| 3883 | interrupted by a signal. Just loop to try the waitpid() again. |
| 3884 | |
| 3885 | If errno == ECHILD, waitpid() is telling us that there are no subprocesses |
| 3886 | in existence. This should never happen, and is an unexpected error. |
| 3887 | However, there is a nasty complication when running under Linux. If "strace |
| 3888 | -f" is being used under Linux to trace this process and its children, |
| 3889 | subprocesses are "stolen" from their parents and become the children of the |
| 3890 | tracing process. A general wait such as the one we've just obeyed returns |
| 3891 | as if there are no children while subprocesses are running. Once a |
| 3892 | subprocess completes, it is restored to the parent, and waitpid(-1) finds |
| 3893 | it. Thanks to Joachim Wieland for finding all this out and suggesting a |
| 3894 | palliative. |
| 3895 | |
| 3896 | This does not happen using "truss" on Solaris, nor (I think) with other |
| 3897 | tracing facilities on other OS. It seems to be specific to Linux. |
| 3898 | |
| 3899 | What we do to get round this is to use kill() to see if any of our |
| 3900 | subprocesses are still in existence. If kill() gives an OK return, we know |
| 3901 | it must be for one of our processes - it can't be for a re-use of the pid, |
| 3902 | because if our process had finished, waitpid() would have found it. If any |
| 3903 | of our subprocesses are in existence, we proceed to use select() as if |
| 3904 | waitpid() had returned zero. I think this is safe. */ |
| 3905 | |
| 3906 | if (pid < 0) |
| 3907 | { |
| 3908 | if (errno != ECHILD) continue; /* Repeats the waitpid() */ |
| 3909 | |
| 3910 | DEBUG(D_deliver) |
| 3911 | debug_printf("waitpid() returned -1/ECHILD: checking explicitly " |
| 3912 | "for process existence\n"); |
| 3913 | |
| 3914 | for (poffset = 0; poffset < remote_max_parallel; poffset++) |
| 3915 | { |
| 3916 | if ((pid = parlist[poffset].pid) != 0 && kill(pid, 0) == 0) |
| 3917 | { |
| 3918 | DEBUG(D_deliver) debug_printf("process %d still exists: assume " |
| 3919 | "stolen by strace\n", (int)pid); |
| 3920 | break; /* With poffset set */ |
| 3921 | } |
| 3922 | } |
| 3923 | |
| 3924 | if (poffset >= remote_max_parallel) |
| 3925 | { |
| 3926 | DEBUG(D_deliver) debug_printf("*** no delivery children found\n"); |
| 3927 | return NULL; /* This is the error return */ |
| 3928 | } |
| 3929 | } |
| 3930 | |
| 3931 | /* A pid value greater than 0 breaks the "while" loop. A negative value has |
| 3932 | been handled above. A return value of zero means that there is at least one |
| 3933 | subprocess, but there are no completed subprocesses. See if any pipes are |
| 3934 | ready with any data for reading. */ |
| 3935 | |
| 3936 | DEBUG(D_deliver) debug_printf("selecting on subprocess pipes\n"); |
| 3937 | |
| 3938 | maxpipe = 0; |
| 3939 | FD_ZERO(&select_pipes); |
| 3940 | for (poffset = 0; poffset < remote_max_parallel; poffset++) |
| 3941 | if (parlist[poffset].pid != 0) |
| 3942 | { |
| 3943 | int fd = parlist[poffset].fd; |
| 3944 | FD_SET(fd, &select_pipes); |
| 3945 | if (fd > maxpipe) maxpipe = fd; |
| 3946 | } |
| 3947 | |
| 3948 | /* Stick in a 60-second timeout, just in case. */ |
| 3949 | |
| 3950 | tv.tv_sec = 60; |
| 3951 | tv.tv_usec = 0; |
| 3952 | |
| 3953 | readycount = select(maxpipe + 1, (SELECT_ARG2_TYPE *)&select_pipes, |
| 3954 | NULL, NULL, &tv); |
| 3955 | |
| 3956 | /* Scan through the pipes and read any that are ready; use the count |
| 3957 | returned by select() to stop when there are no more. Select() can return |
| 3958 | with no processes (e.g. if interrupted). This shouldn't matter. |
| 3959 | |
| 3960 | If par_read_pipe() returns TRUE, it means that either the terminating Z was |
| 3961 | read, or there was a disaster. In either case, we are finished with this |
| 3962 | process. Do an explicit wait() for the process and break the main loop if |
| 3963 | it succeeds. |
| 3964 | |
| 3965 | It turns out that we have to deal with the case of an interrupted system |
| 3966 | call, which can happen on some operating systems if the signal handling is |
| 3967 | set up to do that by default. */ |
| 3968 | |
| 3969 | for (poffset = 0; |
| 3970 | readycount > 0 && poffset < remote_max_parallel; |
| 3971 | poffset++) |
| 3972 | { |
| 3973 | if ( (pid = parlist[poffset].pid) != 0 |
| 3974 | && FD_ISSET(parlist[poffset].fd, &select_pipes) |
| 3975 | ) |
| 3976 | { |
| 3977 | readycount--; |
| 3978 | if (par_read_pipe(poffset, FALSE)) /* Finished with this pipe */ |
| 3979 | for (;;) /* Loop for signals */ |
| 3980 | { |
| 3981 | pid_t endedpid = waitpid(pid, &status, 0); |
| 3982 | if (endedpid == pid) goto PROCESS_DONE; |
| 3983 | if (endedpid != (pid_t)(-1) || errno != EINTR) |
| 3984 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Unexpected error return " |
| 3985 | "%d (errno = %d) from waitpid() for process %d", |
| 3986 | (int)endedpid, errno, (int)pid); |
| 3987 | } |
| 3988 | } |
| 3989 | } |
| 3990 | |
| 3991 | /* Now go back and look for a completed subprocess again. */ |
| 3992 | } |
| 3993 | |
| 3994 | /* A completed process was detected by the non-blocking waitpid(). Find the |
| 3995 | data block that corresponds to this subprocess. */ |
| 3996 | |
| 3997 | for (poffset = 0; poffset < remote_max_parallel; poffset++) |
| 3998 | if (pid == parlist[poffset].pid) break; |
| 3999 | |
| 4000 | /* Found the data block; this is a known remote delivery process. We don't |
| 4001 | need to repeat the outer loop. This should be what normally happens. */ |
| 4002 | |
| 4003 | if (poffset < remote_max_parallel) break; |
| 4004 | |
| 4005 | /* This situation is an error, but it's probably better to carry on looking |
| 4006 | for another process than to give up (as we used to do). */ |
| 4007 | |
| 4008 | log_write(0, LOG_MAIN|LOG_PANIC, "Process %d finished: not found in remote " |
| 4009 | "transport process list", pid); |
| 4010 | } /* End of the "for" loop */ |
| 4011 | |
| 4012 | /* Come here when all the data was completely read after a select(), and |
| 4013 | the process in pid has been wait()ed for. */ |
| 4014 | |
| 4015 | PROCESS_DONE: |
| 4016 | |
| 4017 | DEBUG(D_deliver) |
| 4018 | { |
| 4019 | if (status == 0) |
| 4020 | debug_printf("remote delivery process %d ended\n", (int)pid); |
| 4021 | else |
| 4022 | debug_printf("remote delivery process %d ended: status=%04x\n", (int)pid, |
| 4023 | status); |
| 4024 | } |
| 4025 | |
| 4026 | set_process_info("delivering %s", message_id); |
| 4027 | |
| 4028 | /* Get the chain of processed addresses */ |
| 4029 | |
| 4030 | addrlist = parlist[poffset].addrlist; |
| 4031 | |
| 4032 | /* If the process did not finish cleanly, record an error and freeze (except |
| 4033 | for SIGTERM, SIGKILL and SIGQUIT), and also ensure the journal is not removed, |
| 4034 | in case the delivery did actually happen. */ |
| 4035 | |
| 4036 | if ((status & 0xffff) != 0) |
| 4037 | { |
| 4038 | uschar *msg; |
| 4039 | int msb = (status >> 8) & 255; |
| 4040 | int lsb = status & 255; |
| 4041 | int code = (msb == 0)? (lsb & 0x7f) : msb; |
| 4042 | |
| 4043 | msg = string_sprintf("%s transport process returned non-zero status 0x%04x: " |
| 4044 | "%s %d", |
| 4045 | addrlist->transport->driver_name, |
| 4046 | status, |
| 4047 | (msb == 0)? "terminated by signal" : "exit code", |
| 4048 | code); |
| 4049 | |
| 4050 | if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT)) |
| 4051 | addrlist->special_action = SPECIAL_FREEZE; |
| 4052 | |
| 4053 | for (addr = addrlist; addr; addr = addr->next) |
| 4054 | { |
| 4055 | addr->transport_return = DEFER; |
| 4056 | addr->message = msg; |
| 4057 | } |
| 4058 | |
| 4059 | remove_journal = FALSE; |
| 4060 | } |
| 4061 | |
| 4062 | /* Else complete reading the pipe to get the result of the delivery, if all |
| 4063 | the data has not yet been obtained. */ |
| 4064 | |
| 4065 | else if (!parlist[poffset].done) (void)par_read_pipe(poffset, TRUE); |
| 4066 | |
| 4067 | /* Put the data count and return path into globals, mark the data slot unused, |
| 4068 | decrement the count of subprocesses, and return the address chain. */ |
| 4069 | |
| 4070 | transport_count = parlist[poffset].transport_count; |
| 4071 | used_return_path = parlist[poffset].return_path; |
| 4072 | parlist[poffset].pid = 0; |
| 4073 | parcount--; |
| 4074 | return addrlist; |
| 4075 | } |
| 4076 | |
| 4077 | |
| 4078 | |
| 4079 | /************************************************* |
| 4080 | * Wait for subprocesses and post-process * |
| 4081 | *************************************************/ |
| 4082 | |
| 4083 | /* This function waits for subprocesses until the number that are still running |
| 4084 | is below a given threshold. For each complete subprocess, the addresses are |
| 4085 | post-processed. If we can't find a running process, there is some shambles. |
| 4086 | Better not bomb out, as that might lead to multiple copies of the message. Just |
| 4087 | log and proceed as if all done. |
| 4088 | |
| 4089 | Arguments: |
| 4090 | max maximum number of subprocesses to leave running |
| 4091 | fallback TRUE if processing fallback hosts |
| 4092 | |
| 4093 | Returns: nothing |
| 4094 | */ |
| 4095 | |
| 4096 | static void |
| 4097 | par_reduce(int max, BOOL fallback) |
| 4098 | { |
| 4099 | while (parcount > max) |
| 4100 | { |
| 4101 | address_item *doneaddr = par_wait(); |
| 4102 | if (!doneaddr) |
| 4103 | { |
| 4104 | log_write(0, LOG_MAIN|LOG_PANIC, |
| 4105 | "remote delivery process count got out of step"); |
| 4106 | parcount = 0; |
| 4107 | } |
| 4108 | else |
| 4109 | { |
| 4110 | transport_instance * tp = doneaddr->transport; |
| 4111 | if (tp->max_parallel) |
| 4112 | enq_end(string_sprintf("tpt-serialize-%s", tp->name)); |
| 4113 | |
| 4114 | remote_post_process(doneaddr, LOG_MAIN, NULL, fallback); |
| 4115 | } |
| 4116 | } |
| 4117 | } |
| 4118 | |
| 4119 | static void |
| 4120 | rmt_dlv_checked_write(int fd, char id, char subid, void * buf, ssize_t size) |
| 4121 | { |
| 4122 | uschar pipe_header[PIPE_HEADER_SIZE+1]; |
| 4123 | size_t total_len = PIPE_HEADER_SIZE + size; |
| 4124 | |
| 4125 | struct iovec iov[2] = { |
| 4126 | { pipe_header, PIPE_HEADER_SIZE }, /* indication about the data to expect */ |
| 4127 | { buf, size } /* *the* data */ |
| 4128 | }; |
| 4129 | |
| 4130 | ssize_t ret; |
| 4131 | |
| 4132 | /* we assume that size can't get larger then BIG_BUFFER_SIZE which currently is set to 16k */ |
| 4133 | /* complain to log if someone tries with buffer sizes we can't handle*/ |
| 4134 | |
| 4135 | if (size > BIG_BUFFER_SIZE-1) |
| 4136 | { |
| 4137 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, |
| 4138 | "Failed writing transport result to pipe: can't handle buffers > %d bytes. truncating!\n", |
| 4139 | BIG_BUFFER_SIZE-1); |
| 4140 | size = BIG_BUFFER_SIZE; |
| 4141 | } |
| 4142 | |
| 4143 | /* Should we check that we do not write more than PIPE_BUF? What would |
| 4144 | that help? */ |
| 4145 | |
| 4146 | /* convert size to human readable string prepended by id and subid */ |
| 4147 | if (PIPE_HEADER_SIZE != snprintf(CS pipe_header, PIPE_HEADER_SIZE+1, "%c%c%05ld", |
| 4148 | id, subid, (long)size)) |
| 4149 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "header snprintf failed\n"); |
| 4150 | |
| 4151 | DEBUG(D_deliver) debug_printf("header write id:%c,subid:%c,size:%ld,final:%s\n", |
| 4152 | id, subid, (long)size, pipe_header); |
| 4153 | |
| 4154 | if ((ret = writev(fd, iov, 2)) != total_len) |
| 4155 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, |
| 4156 | "Failed writing transport result to pipe (%ld of %ld bytes): %s", |
| 4157 | (long)ret, (long)total_len, ret == -1 ? strerror(errno) : "short write"); |
| 4158 | } |
| 4159 | |
| 4160 | /************************************************* |
| 4161 | * Do remote deliveries * |
| 4162 | *************************************************/ |
| 4163 | |
| 4164 | /* This function is called to process the addresses in addr_remote. We must |
| 4165 | pick off the queue all addresses that have the same transport, remote |
| 4166 | destination, and errors address, and hand them to the transport in one go, |
| 4167 | subject to some configured limitations. If this is a run to continue delivering |
| 4168 | to an existing delivery channel, skip all but those addresses that can go to |
| 4169 | that channel. The skipped addresses just get deferred. |
| 4170 | |
| 4171 | If mua_wrapper is set, all addresses must be able to be sent in a single |
| 4172 | transaction. If not, this function yields FALSE. |
| 4173 | |
| 4174 | In Exim 4, remote deliveries are always done in separate processes, even |
| 4175 | if remote_max_parallel = 1 or if there's only one delivery to do. The reason |
| 4176 | is so that the base process can retain privilege. This makes the |
| 4177 | implementation of fallback transports feasible (though not initially done.) |
| 4178 | |
| 4179 | We create up to the configured number of subprocesses, each of which passes |
| 4180 | back the delivery state via a pipe. (However, when sending down an existing |
| 4181 | connection, remote_max_parallel is forced to 1.) |
| 4182 | |
| 4183 | Arguments: |
| 4184 | fallback TRUE if processing fallback hosts |
| 4185 | |
| 4186 | Returns: TRUE normally |
| 4187 | FALSE if mua_wrapper is set and the addresses cannot all be sent |
| 4188 | in one transaction |
| 4189 | */ |
| 4190 | |
| 4191 | static BOOL |
| 4192 | do_remote_deliveries(BOOL fallback) |
| 4193 | { |
| 4194 | int parmax; |
| 4195 | int poffset; |
| 4196 | |
| 4197 | parcount = 0; /* Number of executing subprocesses */ |
| 4198 | |
| 4199 | /* When sending down an existing channel, only do one delivery at a time. |
| 4200 | We use a local variable (parmax) to hold the maximum number of processes; |
| 4201 | this gets reduced from remote_max_parallel if we can't create enough pipes. */ |
| 4202 | |
| 4203 | if (continue_transport) remote_max_parallel = 1; |
| 4204 | parmax = remote_max_parallel; |
| 4205 | |
| 4206 | /* If the data for keeping a list of processes hasn't yet been |
| 4207 | set up, do so. */ |
| 4208 | |
| 4209 | if (!parlist) |
| 4210 | { |
| 4211 | parlist = store_get(remote_max_parallel * sizeof(pardata), FALSE); |
| 4212 | for (poffset = 0; poffset < remote_max_parallel; poffset++) |
| 4213 | parlist[poffset].pid = 0; |
| 4214 | } |
| 4215 | |
| 4216 | /* Now loop for each remote delivery */ |
| 4217 | |
| 4218 | for (int delivery_count = 0; addr_remote; delivery_count++) |
| 4219 | { |
| 4220 | pid_t pid; |
| 4221 | uid_t uid; |
| 4222 | gid_t gid; |
| 4223 | int pfd[2]; |
| 4224 | int address_count = 1; |
| 4225 | int address_count_max; |
| 4226 | BOOL multi_domain; |
| 4227 | BOOL use_initgroups; |
| 4228 | BOOL pipe_done = FALSE; |
| 4229 | transport_instance *tp; |
| 4230 | address_item **anchor = &addr_remote; |
| 4231 | address_item *addr = addr_remote; |
| 4232 | address_item *last = addr; |
| 4233 | address_item *next; |
| 4234 | uschar * panicmsg; |
| 4235 | uschar * serialize_key = NULL; |
| 4236 | |
| 4237 | /* Pull the first address right off the list. */ |
| 4238 | |
| 4239 | addr_remote = addr->next; |
| 4240 | addr->next = NULL; |
| 4241 | |
| 4242 | DEBUG(D_deliver|D_transport) |
| 4243 | debug_printf("--------> %s <--------\n", addr->address); |
| 4244 | |
| 4245 | /* If no transport has been set, there has been a big screw-up somewhere. */ |
| 4246 | |
| 4247 | if (!(tp = addr->transport)) |
| 4248 | { |
| 4249 | f.disable_logging = FALSE; /* Jic */ |
| 4250 | panicmsg = US"No transport set by router"; |
| 4251 | goto panic_continue; |
| 4252 | } |
| 4253 | |
| 4254 | /* Check that this base address hasn't previously been delivered to this |
| 4255 | transport. The check is necessary at this point to handle homonymic addresses |
| 4256 | correctly in cases where the pattern of redirection changes between delivery |
| 4257 | attempts. Non-homonymic previous delivery is detected earlier, at routing |
| 4258 | time. */ |
| 4259 | |
| 4260 | if (previously_transported(addr, FALSE)) continue; |
| 4261 | |
| 4262 | /* Force failure if the message is too big. */ |
| 4263 | |
| 4264 | if (tp->message_size_limit) |
| 4265 | { |
| 4266 | int rc = check_message_size(tp, addr); |
| 4267 | if (rc != OK) |
| 4268 | { |
| 4269 | addr->transport_return = rc; |
| 4270 | remote_post_process(addr, LOG_MAIN, NULL, fallback); |
| 4271 | continue; |
| 4272 | } |
| 4273 | } |
| 4274 | |
| 4275 | /* Get the flag which specifies whether the transport can handle different |
| 4276 | domains that nevertheless resolve to the same set of hosts. If it needs |
| 4277 | expanding, get variables set: $address_data, $domain_data, $localpart_data, |
| 4278 | $host, $host_address, $host_port. */ |
| 4279 | if (tp->expand_multi_domain) |
| 4280 | deliver_set_expansions(addr); |
| 4281 | |
| 4282 | if (exp_bool(addr, US"transport", tp->name, D_transport, |
| 4283 | US"multi_domain", tp->multi_domain, tp->expand_multi_domain, |
| 4284 | &multi_domain) != OK) |
| 4285 | { |
| 4286 | deliver_set_expansions(NULL); |
| 4287 | panicmsg = addr->message; |
| 4288 | goto panic_continue; |
| 4289 | } |
| 4290 | |
| 4291 | /* Get the maximum it can handle in one envelope, with zero meaning |
| 4292 | unlimited, which is forced for the MUA wrapper case. */ |
| 4293 | |
| 4294 | address_count_max = tp->max_addresses; |
| 4295 | if (address_count_max == 0 || mua_wrapper) address_count_max = 999999; |
| 4296 | |
| 4297 | |
| 4298 | /************************************************************************/ |
| 4299 | /***** This is slightly experimental code, but should be safe. *****/ |
| 4300 | |
| 4301 | /* The address_count_max value is the maximum number of addresses that the |
| 4302 | transport can send in one envelope. However, the transport must be capable of |
| 4303 | dealing with any number of addresses. If the number it gets exceeds its |
| 4304 | envelope limitation, it must send multiple copies of the message. This can be |
| 4305 | done over a single connection for SMTP, so uses less resources than making |
| 4306 | multiple connections. On the other hand, if remote_max_parallel is greater |
| 4307 | than one, it is perhaps a good idea to use parallel processing to move the |
| 4308 | message faster, even if that results in multiple simultaneous connections to |
| 4309 | the same host. |
| 4310 | |
| 4311 | How can we come to some compromise between these two ideals? What we do is to |
| 4312 | limit the number of addresses passed to a single instance of a transport to |
| 4313 | the greater of (a) its address limit (rcpt_max for SMTP) and (b) the total |
| 4314 | number of addresses routed to remote transports divided by |
| 4315 | remote_max_parallel. For example, if the message has 100 remote recipients, |
| 4316 | remote max parallel is 2, and rcpt_max is 10, we'd never send more than 50 at |
| 4317 | once. But if rcpt_max is 100, we could send up to 100. |
| 4318 | |
| 4319 | Of course, not all the remotely addresses in a message are going to go to the |
| 4320 | same set of hosts (except in smarthost configurations), so this is just a |
| 4321 | heuristic way of dividing up the work. |
| 4322 | |
| 4323 | Furthermore (1), because this may not be wanted in some cases, and also to |
| 4324 | cope with really pathological cases, there is also a limit to the number of |
| 4325 | messages that are sent over one connection. This is the same limit that is |
| 4326 | used when sending several different messages over the same connection. |
| 4327 | Continue_sequence is set when in this situation, to the number sent so |
| 4328 | far, including this message. |
| 4329 | |
| 4330 | Furthermore (2), when somebody explicitly sets the maximum value to 1, it |
| 4331 | is probably because they are using VERP, in which case they want to pass only |
| 4332 | one address at a time to the transport, in order to be able to use |
| 4333 | $local_part and $domain in constructing a new return path. We could test for |
| 4334 | the use of these variables, but as it is so likely they will be used when the |
| 4335 | maximum is 1, we don't bother. Just leave the value alone. */ |
| 4336 | |
| 4337 | if ( address_count_max != 1 |
| 4338 | && address_count_max < remote_delivery_count/remote_max_parallel |
| 4339 | ) |
| 4340 | { |
| 4341 | int new_max = remote_delivery_count/remote_max_parallel; |
| 4342 | int message_max = tp->connection_max_messages; |
| 4343 | if (connection_max_messages >= 0) message_max = connection_max_messages; |
| 4344 | message_max -= continue_sequence - 1; |
| 4345 | if (message_max > 0 && new_max > address_count_max * message_max) |
| 4346 | new_max = address_count_max * message_max; |
| 4347 | address_count_max = new_max; |
| 4348 | } |
| 4349 | |
| 4350 | /************************************************************************/ |
| 4351 | |
| 4352 | |
| 4353 | /* Pick off all addresses which have the same transport, errors address, |
| 4354 | destination, and extra headers. In some cases they point to the same host |
| 4355 | list, but we also need to check for identical host lists generated from |
| 4356 | entirely different domains. The host list pointers can be NULL in the case |
| 4357 | where the hosts are defined in the transport. There is also a configured |
| 4358 | maximum limit of addresses that can be handled at once (see comments above |
| 4359 | for how it is computed). |
| 4360 | If the transport does not handle multiple domains, enforce that also, |
| 4361 | and if it might need a per-address check for this, re-evaluate it. |
| 4362 | */ |
| 4363 | |
| 4364 | while ((next = *anchor) && address_count < address_count_max) |
| 4365 | { |
| 4366 | BOOL md; |
| 4367 | if ( (multi_domain || Ustrcmp(next->domain, addr->domain) == 0) |
| 4368 | && tp == next->transport |
| 4369 | && same_hosts(next->host_list, addr->host_list) |
| 4370 | && same_strings(next->prop.errors_address, addr->prop.errors_address) |
| 4371 | && same_headers(next->prop.extra_headers, addr->prop.extra_headers) |
| 4372 | && same_ugid(tp, next, addr) |
| 4373 | && ( next->prop.remove_headers == addr->prop.remove_headers |
| 4374 | || ( next->prop.remove_headers |
| 4375 | && addr->prop.remove_headers |
| 4376 | && Ustrcmp(next->prop.remove_headers, addr->prop.remove_headers) == 0 |
| 4377 | ) ) |
| 4378 | && ( !multi_domain |
| 4379 | || ( ( |
| 4380 | (void)(!tp->expand_multi_domain || ((void)deliver_set_expansions(next), 1)), |
| 4381 | exp_bool(addr, |
| 4382 | US"transport", next->transport->name, D_transport, |
| 4383 | US"multi_domain", next->transport->multi_domain, |
| 4384 | next->transport->expand_multi_domain, &md) == OK |
| 4385 | ) |
| 4386 | && md |
| 4387 | ) ) ) |
| 4388 | { |
| 4389 | *anchor = next->next; |
| 4390 | next->next = NULL; |
| 4391 | next->first = addr; /* remember top one (for retry processing) */ |
| 4392 | last->next = next; |
| 4393 | last = next; |
| 4394 | address_count++; |
| 4395 | } |
| 4396 | else anchor = &(next->next); |
| 4397 | deliver_set_expansions(NULL); |
| 4398 | } |
| 4399 | |
| 4400 | /* If we are acting as an MUA wrapper, all addresses must go in a single |
| 4401 | transaction. If not, put them back on the chain and yield FALSE. */ |
| 4402 | |
| 4403 | if (mua_wrapper && addr_remote) |
| 4404 | { |
| 4405 | last->next = addr_remote; |
| 4406 | addr_remote = addr; |
| 4407 | return FALSE; |
| 4408 | } |
| 4409 | |
| 4410 | /* If the transport is limited for parallellism, enforce that here. |
| 4411 | The hints DB entry is decremented in par_reduce(), when we reap the |
| 4412 | transport process. */ |
| 4413 | |
| 4414 | if (tpt_parallel_check(tp, addr, &serialize_key)) |
| 4415 | if ((panicmsg = expand_string_message)) |
| 4416 | goto panic_continue; |
| 4417 | else |
| 4418 | continue; /* Loop for the next set of addresses. */ |
| 4419 | |
| 4420 | /* Set up the expansion variables for this set of addresses */ |
| 4421 | |
| 4422 | deliver_set_expansions(addr); |
| 4423 | |
| 4424 | /* Ensure any transport-set auth info is fresh */ |
| 4425 | addr->authenticator = addr->auth_id = addr->auth_sndr = NULL; |
| 4426 | |
| 4427 | /* Compute the return path, expanding a new one if required. The old one |
| 4428 | must be set first, as it might be referred to in the expansion. */ |
| 4429 | |
| 4430 | if(addr->prop.errors_address) |
| 4431 | return_path = addr->prop.errors_address; |
| 4432 | #ifdef EXPERIMENTAL_SRS |
| 4433 | else if(addr->prop.srs_sender) |
| 4434 | return_path = addr->prop.srs_sender; |
| 4435 | #endif |
| 4436 | else |
| 4437 | return_path = sender_address; |
| 4438 | |
| 4439 | if (tp->return_path) |
| 4440 | { |
| 4441 | uschar *new_return_path = expand_string(tp->return_path); |
| 4442 | if (new_return_path) |
| 4443 | return_path = new_return_path; |
| 4444 | else if (!f.expand_string_forcedfail) |
| 4445 | { |
| 4446 | panicmsg = string_sprintf("Failed to expand return path \"%s\": %s", |
| 4447 | tp->return_path, expand_string_message); |
| 4448 | goto enq_continue; |
| 4449 | } |
| 4450 | } |
| 4451 | |
| 4452 | /* Find the uid, gid, and use_initgroups setting for this transport. Failure |
| 4453 | logs and sets up error messages, so we just post-process and continue with |
| 4454 | the next address. */ |
| 4455 | |
| 4456 | if (!findugid(addr, tp, &uid, &gid, &use_initgroups)) |
| 4457 | { |
| 4458 | panicmsg = NULL; |
| 4459 | goto enq_continue; |
| 4460 | } |
| 4461 | |
| 4462 | /* If this transport has a setup function, call it now so that it gets |
| 4463 | run in this process and not in any subprocess. That way, the results of |
| 4464 | any setup that are retained by the transport can be reusable. One of the |
| 4465 | things the setup does is to set the fallback host lists in the addresses. |
| 4466 | That is why it is called at this point, before the continue delivery |
| 4467 | processing, because that might use the fallback hosts. */ |
| 4468 | |
| 4469 | if (tp->setup) |
| 4470 | (void)((tp->setup)(addr->transport, addr, NULL, uid, gid, NULL)); |
| 4471 | |
| 4472 | /* If we have a connection still open from a verify stage (lazy-close) |
| 4473 | treat it as if it is a continued connection (apart from the counter used |
| 4474 | for the log line mark). */ |
| 4475 | |
| 4476 | if (cutthrough.cctx.sock >= 0 && cutthrough.callout_hold_only) |
| 4477 | { |
| 4478 | DEBUG(D_deliver) |
| 4479 | debug_printf("lazy-callout-close: have conn still open from verification\n"); |
| 4480 | continue_transport = cutthrough.transport; |
| 4481 | continue_hostname = string_copy(cutthrough.host.name); |
| 4482 | continue_host_address = string_copy(cutthrough.host.address); |
| 4483 | continue_sequence = 1; |
| 4484 | sending_ip_address = cutthrough.snd_ip; |
| 4485 | sending_port = cutthrough.snd_port; |
| 4486 | smtp_peer_options = cutthrough.peer_options; |
| 4487 | } |
| 4488 | |
| 4489 | /* If this is a run to continue delivery down an already-established |
| 4490 | channel, check that this set of addresses matches the transport and |
| 4491 | the channel. If it does not, defer the addresses. If a host list exists, |
| 4492 | we must check that the continue host is on the list. Otherwise, the |
| 4493 | host is set in the transport. */ |
| 4494 | |
| 4495 | f.continue_more = FALSE; /* In case got set for the last lot */ |
| 4496 | if (continue_transport) |
| 4497 | { |
| 4498 | BOOL ok = Ustrcmp(continue_transport, tp->name) == 0; |
| 4499 | |
| 4500 | /* If the transport is about to override the host list do not check |
| 4501 | it here but take the cost of running the transport process to discover |
| 4502 | if the continued_hostname connection is suitable. This is a layering |
| 4503 | violation which is unfortunate as it requires we haul in the smtp |
| 4504 | include file. */ |
| 4505 | |
| 4506 | if (ok) |
| 4507 | { |
| 4508 | smtp_transport_options_block * ob; |
| 4509 | |
| 4510 | if ( !( Ustrcmp(tp->info->driver_name, "smtp") == 0 |
| 4511 | && (ob = (smtp_transport_options_block *)tp->options_block) |
| 4512 | && ob->hosts_override && ob->hosts |
| 4513 | ) |
| 4514 | && addr->host_list |
| 4515 | ) |
| 4516 | { |
| 4517 | ok = FALSE; |
| 4518 | for (host_item * h = addr->host_list; h; h = h->next) |
| 4519 | if (Ustrcmp(h->name, continue_hostname) == 0) |
| 4520 | /*XXX should also check port here */ |
| 4521 | { ok = TRUE; break; } |
| 4522 | } |
| 4523 | } |
| 4524 | |
| 4525 | /* Addresses not suitable; defer or queue for fallback hosts (which |
| 4526 | might be the continue host) and skip to next address. */ |
| 4527 | |
| 4528 | if (!ok) |
| 4529 | { |
| 4530 | DEBUG(D_deliver) debug_printf("not suitable for continue_transport (%s)\n", |
| 4531 | Ustrcmp(continue_transport, tp->name) != 0 |
| 4532 | ? string_sprintf("tpt %s vs %s", continue_transport, tp->name) |
| 4533 | : string_sprintf("no host matching %s", continue_hostname)); |
| 4534 | if (serialize_key) enq_end(serialize_key); |
| 4535 | |
| 4536 | if (addr->fallback_hosts && !fallback) |
| 4537 | { |
| 4538 | for (next = addr; ; next = next->next) |
| 4539 | { |
| 4540 | next->host_list = next->fallback_hosts; |
| 4541 | DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", next->address); |
| 4542 | if (!next->next) break; |
| 4543 | } |
| 4544 | next->next = addr_fallback; |
| 4545 | addr_fallback = addr; |
| 4546 | } |
| 4547 | |
| 4548 | else |
| 4549 | { |
| 4550 | for (next = addr; ; next = next->next) |
| 4551 | { |
| 4552 | DEBUG(D_deliver) debug_printf(" %s to def list\n", next->address); |
| 4553 | if (!next->next) break; |
| 4554 | } |
| 4555 | next->next = addr_defer; |
| 4556 | addr_defer = addr; |
| 4557 | } |
| 4558 | |
| 4559 | continue; |
| 4560 | } |
| 4561 | |
| 4562 | /* Set a flag indicating whether there are further addresses that list |
| 4563 | the continued host. This tells the transport to leave the channel open, |
| 4564 | but not to pass it to another delivery process. We'd like to do that |
| 4565 | for non-continue_transport cases too but the knowlege of which host is |
| 4566 | connected to is too hard to manage. Perhaps we need a finer-grain |
| 4567 | interface to the transport. */ |
| 4568 | |
| 4569 | for (next = addr_remote; next && !f.continue_more; next = next->next) |
| 4570 | for (host_item * h = next->host_list; h; h = h->next) |
| 4571 | if (Ustrcmp(h->name, continue_hostname) == 0) |
| 4572 | { f.continue_more = TRUE; break; } |
| 4573 | } |
| 4574 | |
| 4575 | /* The transports set up the process info themselves as they may connect |
| 4576 | to more than one remote machine. They also have to set up the filter |
| 4577 | arguments, if required, so that the host name and address are available |
| 4578 | for expansion. */ |
| 4579 | |
| 4580 | transport_filter_argv = NULL; |
| 4581 | |
| 4582 | /* Create the pipe for inter-process communication. If pipe creation |
| 4583 | fails, it is probably because the value of remote_max_parallel is so |
| 4584 | large that too many file descriptors for pipes have been created. Arrange |
| 4585 | to wait for a process to finish, and then try again. If we still can't |
| 4586 | create a pipe when all processes have finished, break the retry loop. */ |
| 4587 | |
| 4588 | while (!pipe_done) |
| 4589 | { |
| 4590 | if (pipe(pfd) == 0) pipe_done = TRUE; |
| 4591 | else if (parcount > 0) parmax = parcount; |
| 4592 | else break; |
| 4593 | |
| 4594 | /* We need to make the reading end of the pipe non-blocking. There are |
| 4595 | two different options for this. Exim is cunningly (I hope!) coded so |
| 4596 | that it can use either of them, though it prefers O_NONBLOCK, which |
| 4597 | distinguishes between EOF and no-more-data. */ |
| 4598 | |
| 4599 | /* The data appears in a timely manner and we already did a select on |
| 4600 | all pipes, so I do not see a reason to use non-blocking IO here |
| 4601 | |
| 4602 | #ifdef O_NONBLOCK |
| 4603 | (void)fcntl(pfd[pipe_read], F_SETFL, O_NONBLOCK); |
| 4604 | #else |
| 4605 | (void)fcntl(pfd[pipe_read], F_SETFL, O_NDELAY); |
| 4606 | #endif |
| 4607 | */ |
| 4608 | |
| 4609 | /* If the maximum number of subprocesses already exist, wait for a process |
| 4610 | to finish. If we ran out of file descriptors, parmax will have been reduced |
| 4611 | from its initial value of remote_max_parallel. */ |
| 4612 | |
| 4613 | par_reduce(parmax - 1, fallback); |
| 4614 | } |
| 4615 | |
| 4616 | /* If we failed to create a pipe and there were no processes to wait |
| 4617 | for, we have to give up on this one. Do this outside the above loop |
| 4618 | so that we can continue the main loop. */ |
| 4619 | |
| 4620 | if (!pipe_done) |
| 4621 | { |
| 4622 | panicmsg = string_sprintf("unable to create pipe: %s", strerror(errno)); |
| 4623 | goto enq_continue; |
| 4624 | } |
| 4625 | |
| 4626 | /* Find a free slot in the pardata list. Must do this after the possible |
| 4627 | waiting for processes to finish, because a terminating process will free |
| 4628 | up a slot. */ |
| 4629 | |
| 4630 | for (poffset = 0; poffset < remote_max_parallel; poffset++) |
| 4631 | if (parlist[poffset].pid == 0) |
| 4632 | break; |
| 4633 | |
| 4634 | /* If there isn't one, there has been a horrible disaster. */ |
| 4635 | |
| 4636 | if (poffset >= remote_max_parallel) |
| 4637 | { |
| 4638 | (void)close(pfd[pipe_write]); |
| 4639 | (void)close(pfd[pipe_read]); |
| 4640 | panicmsg = US"Unexpectedly no free subprocess slot"; |
| 4641 | goto enq_continue; |
| 4642 | } |
| 4643 | |
| 4644 | /* Now fork a subprocess to do the remote delivery, but before doing so, |
| 4645 | ensure that any cached resources are released so as not to interfere with |
| 4646 | what happens in the subprocess. */ |
| 4647 | |
| 4648 | search_tidyup(); |
| 4649 | |
| 4650 | if ((pid = exim_fork(US"transport")) == 0) |
| 4651 | { |
| 4652 | int fd = pfd[pipe_write]; |
| 4653 | host_item *h; |
| 4654 | |
| 4655 | /* Setting this global in the subprocess means we need never clear it */ |
| 4656 | transport_name = tp->name; |
| 4657 | |
| 4658 | /* There are weird circumstances in which logging is disabled */ |
| 4659 | f.disable_logging = tp->disable_logging; |
| 4660 | |
| 4661 | /* Show pids on debug output if parallelism possible */ |
| 4662 | |
| 4663 | if (parmax > 1 && (parcount > 0 || addr_remote)) |
| 4664 | DEBUG(D_any|D_v) debug_selector |= D_pid; |
| 4665 | |
| 4666 | /* Reset the random number generator, so different processes don't all |
| 4667 | have the same sequence. In the test harness we want different, but |
| 4668 | predictable settings for each delivery process, so do something explicit |
| 4669 | here rather they rely on the fixed reset in the random number function. */ |
| 4670 | |
| 4671 | random_seed = f.running_in_test_harness ? 42 + 2*delivery_count : 0; |
| 4672 | |
| 4673 | /* Set close-on-exec on the pipe so that it doesn't get passed on to |
| 4674 | a new process that may be forked to do another delivery down the same |
| 4675 | SMTP connection. */ |
| 4676 | |
| 4677 | (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC); |
| 4678 | |
| 4679 | /* Close open file descriptors for the pipes of other processes |
| 4680 | that are running in parallel. */ |
| 4681 | |
| 4682 | for (poffset = 0; poffset < remote_max_parallel; poffset++) |
| 4683 | if (parlist[poffset].pid != 0) (void)close(parlist[poffset].fd); |
| 4684 | |
| 4685 | /* This process has inherited a copy of the file descriptor |
| 4686 | for the data file, but its file pointer is shared with all the |
| 4687 | other processes running in parallel. Therefore, we have to re-open |
| 4688 | the file in order to get a new file descriptor with its own |
| 4689 | file pointer. We don't need to lock it, as the lock is held by |
| 4690 | the parent process. There doesn't seem to be any way of doing |
| 4691 | a dup-with-new-file-pointer. */ |
| 4692 | |
| 4693 | (void)close(deliver_datafile); |
| 4694 | { |
| 4695 | uschar * fname = spool_fname(US"input", message_subdir, message_id, US"-D"); |
| 4696 | |
| 4697 | if ((deliver_datafile = Uopen(fname, |
| 4698 | #ifdef O_CLOEXEC |
| 4699 | O_CLOEXEC | |
| 4700 | #endif |
| 4701 | O_RDWR | O_APPEND, 0)) < 0) |
| 4702 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to reopen %s for remote " |
| 4703 | "parallel delivery: %s", fname, strerror(errno)); |
| 4704 | } |
| 4705 | |
| 4706 | /* Set the close-on-exec flag */ |
| 4707 | #ifndef O_CLOEXEC |
| 4708 | (void)fcntl(deliver_datafile, F_SETFD, fcntl(deliver_datafile, F_GETFD) | |
| 4709 | FD_CLOEXEC); |
| 4710 | #endif |
| 4711 | |
| 4712 | /* Set the uid/gid of this process; bombs out on failure. */ |
| 4713 | |
| 4714 | exim_setugid(uid, gid, use_initgroups, |
| 4715 | string_sprintf("remote delivery to %s with transport=%s", |
| 4716 | addr->address, tp->name)); |
| 4717 | |
| 4718 | /* Close the unwanted half of this process' pipe, set the process state, |
| 4719 | and run the transport. Afterwards, transport_count will contain the number |
| 4720 | of bytes written. */ |
| 4721 | |
| 4722 | (void)close(pfd[pipe_read]); |
| 4723 | set_process_info("delivering %s using %s", message_id, tp->name); |
| 4724 | debug_print_string(tp->debug_string); |
| 4725 | if (!(tp->info->code)(addr->transport, addr)) replicate_status(addr); |
| 4726 | |
| 4727 | set_process_info("delivering %s (just run %s for %s%s in subprocess)", |
| 4728 | message_id, tp->name, addr->address, addr->next ? ", ..." : ""); |
| 4729 | |
| 4730 | /* Ensure any cached resources that we used are now released */ |
| 4731 | |
| 4732 | search_tidyup(); |
| 4733 | |
| 4734 | /* Pass the result back down the pipe. This is a lot more information |
| 4735 | than is needed for a local delivery. We have to send back the error |
| 4736 | status for each address, the usability status for each host that is |
| 4737 | flagged as unusable, and all the retry items. When TLS is in use, we |
| 4738 | send also the cipher and peerdn information. Each type of information |
| 4739 | is flagged by an identifying byte, and is then in a fixed format (with |
| 4740 | strings terminated by zeros), and there is a final terminator at the |
| 4741 | end. The host information and retry information is all attached to |
| 4742 | the first address, so that gets sent at the start. */ |
| 4743 | |
| 4744 | /* Host unusability information: for most success cases this will |
| 4745 | be null. */ |
| 4746 | |
| 4747 | for (h = addr->host_list; h; h = h->next) |
| 4748 | { |
| 4749 | if (!h->address || h->status < hstatus_unusable) continue; |
| 4750 | sprintf(CS big_buffer, "%c%c%s", h->status, h->why, h->address); |
| 4751 | rmt_dlv_checked_write(fd, 'H', '0', big_buffer, Ustrlen(big_buffer+2) + 3); |
| 4752 | } |
| 4753 | |
| 4754 | /* The number of bytes written. This is the same for each address. Even |
| 4755 | if we sent several copies of the message down the same connection, the |
| 4756 | size of each one is the same, and it's that value we have got because |
| 4757 | transport_count gets reset before calling transport_write_message(). */ |
| 4758 | |
| 4759 | memcpy(big_buffer, &transport_count, sizeof(transport_count)); |
| 4760 | rmt_dlv_checked_write(fd, 'S', '0', big_buffer, sizeof(transport_count)); |
| 4761 | |
| 4762 | /* Information about what happened to each address. Four item types are |
| 4763 | used: an optional 'X' item first, for TLS information, then an optional "C" |
| 4764 | item for any client-auth info followed by 'R' items for any retry settings, |
| 4765 | and finally an 'A' item for the remaining data. */ |
| 4766 | |
| 4767 | for(; addr; addr = addr->next) |
| 4768 | { |
| 4769 | uschar *ptr; |
| 4770 | |
| 4771 | /* The certificate verification status goes into the flags */ |
| 4772 | if (tls_out.certificate_verified) setflag(addr, af_cert_verified); |
| 4773 | #ifdef SUPPORT_DANE |
| 4774 | if (tls_out.dane_verified) setflag(addr, af_dane_verified); |
| 4775 | #endif |
| 4776 | # ifdef EXPERIMENTAL_TLS_RESUME |
| 4777 | if (tls_out.resumption & RESUME_USED) setflag(addr, af_tls_resume); |
| 4778 | # endif |
| 4779 | |
| 4780 | /* Use an X item only if there's something to send */ |
| 4781 | #ifndef DISABLE_TLS |
| 4782 | if (addr->cipher) |
| 4783 | { |
| 4784 | ptr = big_buffer + sprintf(CS big_buffer, "%.128s", addr->cipher) + 1; |
| 4785 | if (!addr->peerdn) |
| 4786 | *ptr++ = 0; |
| 4787 | else |
| 4788 | ptr += sprintf(CS ptr, "%.512s", addr->peerdn) + 1; |
| 4789 | |
| 4790 | rmt_dlv_checked_write(fd, 'X', '1', big_buffer, ptr - big_buffer); |
| 4791 | } |
| 4792 | else if (continue_proxy_cipher) |
| 4793 | { |
| 4794 | ptr = big_buffer + sprintf(CS big_buffer, "%.128s", continue_proxy_cipher) + 1; |
| 4795 | *ptr++ = 0; |
| 4796 | rmt_dlv_checked_write(fd, 'X', '1', big_buffer, ptr - big_buffer); |
| 4797 | } |
| 4798 | |
| 4799 | if (addr->peercert) |
| 4800 | { |
| 4801 | ptr = big_buffer; |
| 4802 | if (tls_export_cert(ptr, big_buffer_size-2, addr->peercert)) |
| 4803 | while(*ptr++); |
| 4804 | else |
| 4805 | *ptr++ = 0; |
| 4806 | rmt_dlv_checked_write(fd, 'X', '2', big_buffer, ptr - big_buffer); |
| 4807 | } |
| 4808 | if (addr->ourcert) |
| 4809 | { |
| 4810 | ptr = big_buffer; |
| 4811 | if (tls_export_cert(ptr, big_buffer_size-2, addr->ourcert)) |
| 4812 | while(*ptr++); |
| 4813 | else |
| 4814 | *ptr++ = 0; |
| 4815 | rmt_dlv_checked_write(fd, 'X', '3', big_buffer, ptr - big_buffer); |
| 4816 | } |
| 4817 | # ifndef DISABLE_OCSP |
| 4818 | if (addr->ocsp > OCSP_NOT_REQ) |
| 4819 | { |
| 4820 | ptr = big_buffer + sprintf(CS big_buffer, "%c", addr->ocsp + '0') + 1; |
| 4821 | rmt_dlv_checked_write(fd, 'X', '4', big_buffer, ptr - big_buffer); |
| 4822 | } |
| 4823 | # endif |
| 4824 | #endif /*DISABLE_TLS*/ |
| 4825 | |
| 4826 | if (client_authenticator) |
| 4827 | { |
| 4828 | ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticator) + 1; |
| 4829 | rmt_dlv_checked_write(fd, 'C', '1', big_buffer, ptr - big_buffer); |
| 4830 | } |
| 4831 | if (client_authenticated_id) |
| 4832 | { |
| 4833 | ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticated_id) + 1; |
| 4834 | rmt_dlv_checked_write(fd, 'C', '2', big_buffer, ptr - big_buffer); |
| 4835 | } |
| 4836 | if (client_authenticated_sender) |
| 4837 | { |
| 4838 | ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticated_sender) + 1; |
| 4839 | rmt_dlv_checked_write(fd, 'C', '3', big_buffer, ptr - big_buffer); |
| 4840 | } |
| 4841 | |
| 4842 | #ifndef DISABLE_PRDR |
| 4843 | if (testflag(addr, af_prdr_used)) |
| 4844 | rmt_dlv_checked_write(fd, 'P', '0', NULL, 0); |
| 4845 | #endif |
| 4846 | |
| 4847 | if (testflag(addr, af_pipelining)) |
| 4848 | #ifndef DISABLE_PIPE_CONNECT |
| 4849 | if (testflag(addr, af_early_pipe)) |
| 4850 | rmt_dlv_checked_write(fd, 'L', '2', NULL, 0); |
| 4851 | else |
| 4852 | #endif |
| 4853 | rmt_dlv_checked_write(fd, 'L', '1', NULL, 0); |
| 4854 | |
| 4855 | if (testflag(addr, af_chunking_used)) |
| 4856 | rmt_dlv_checked_write(fd, 'K', '0', NULL, 0); |
| 4857 | |
| 4858 | if (testflag(addr, af_tcp_fastopen_conn)) |
| 4859 | rmt_dlv_checked_write(fd, 'T', |
| 4860 | testflag(addr, af_tcp_fastopen) ? testflag(addr, af_tcp_fastopen_data) |
| 4861 | ? '2' : '1' : '0', |
| 4862 | NULL, 0); |
| 4863 | |
| 4864 | memcpy(big_buffer, &addr->dsn_aware, sizeof(addr->dsn_aware)); |
| 4865 | rmt_dlv_checked_write(fd, 'D', '0', big_buffer, sizeof(addr->dsn_aware)); |
| 4866 | |
| 4867 | /* Retry information: for most success cases this will be null. */ |
| 4868 | |
| 4869 | for (retry_item * r = addr->retries; r; r = r->next) |
| 4870 | { |
| 4871 | sprintf(CS big_buffer, "%c%.500s", r->flags, r->key); |
| 4872 | ptr = big_buffer + Ustrlen(big_buffer+2) + 3; |
| 4873 | memcpy(ptr, &r->basic_errno, sizeof(r->basic_errno)); |
| 4874 | ptr += sizeof(r->basic_errno); |
| 4875 | memcpy(ptr, &r->more_errno, sizeof(r->more_errno)); |
| 4876 | ptr += sizeof(r->more_errno); |
| 4877 | if (!r->message) *ptr++ = 0; else |
| 4878 | { |
| 4879 | sprintf(CS ptr, "%.512s", r->message); |
| 4880 | while(*ptr++); |
| 4881 | } |
| 4882 | rmt_dlv_checked_write(fd, 'R', '0', big_buffer, ptr - big_buffer); |
| 4883 | } |
| 4884 | |
| 4885 | #ifdef SUPPORT_SOCKS |
| 4886 | if (LOGGING(proxy) && proxy_session) |
| 4887 | { |
| 4888 | ptr = big_buffer; |
| 4889 | if (proxy_local_address) |
| 4890 | { |
| 4891 | DEBUG(D_deliver) debug_printf("proxy_local_address '%s'\n", proxy_local_address); |
| 4892 | ptr = big_buffer + sprintf(CS ptr, "%.128s", proxy_local_address) + 1; |
| 4893 | DEBUG(D_deliver) debug_printf("proxy_local_port %d\n", proxy_local_port); |
| 4894 | memcpy(ptr, &proxy_local_port, sizeof(proxy_local_port)); |
| 4895 | ptr += sizeof(proxy_local_port); |
| 4896 | } |
| 4897 | else |
| 4898 | *ptr++ = '\0'; |
| 4899 | rmt_dlv_checked_write(fd, 'A', '2', big_buffer, ptr - big_buffer); |
| 4900 | } |
| 4901 | #endif |
| 4902 | |
| 4903 | #ifdef EXPERIMENTAL_DSN_INFO |
| 4904 | /*um, are they really per-addr? Other per-conn stuff is not (auth, tls). But host_used is! */ |
| 4905 | if (addr->smtp_greeting) |
| 4906 | { |
| 4907 | DEBUG(D_deliver) debug_printf("smtp_greeting '%s'\n", addr->smtp_greeting); |
| 4908 | ptr = big_buffer + sprintf(CS big_buffer, "%.128s", addr->smtp_greeting) + 1; |
| 4909 | if (addr->helo_response) |
| 4910 | { |
| 4911 | DEBUG(D_deliver) debug_printf("helo_response '%s'\n", addr->helo_response); |
| 4912 | ptr += sprintf(CS ptr, "%.128s", addr->helo_response) + 1; |
| 4913 | } |
| 4914 | else |
| 4915 | *ptr++ = '\0'; |
| 4916 | rmt_dlv_checked_write(fd, 'A', '1', big_buffer, ptr - big_buffer); |
| 4917 | } |
| 4918 | #endif |
| 4919 | |
| 4920 | /* The rest of the information goes in an 'A0' item. */ |
| 4921 | |
| 4922 | sprintf(CS big_buffer, "%c%c", addr->transport_return, addr->special_action); |
| 4923 | ptr = big_buffer + 2; |
| 4924 | memcpy(ptr, &addr->basic_errno, sizeof(addr->basic_errno)); |
| 4925 | ptr += sizeof(addr->basic_errno); |
| 4926 | memcpy(ptr, &addr->more_errno, sizeof(addr->more_errno)); |
| 4927 | ptr += sizeof(addr->more_errno); |
| 4928 | memcpy(ptr, &addr->delivery_time, sizeof(addr->delivery_time)); |
| 4929 | ptr += sizeof(addr->delivery_time); |
| 4930 | memcpy(ptr, &addr->flags, sizeof(addr->flags)); |
| 4931 | ptr += sizeof(addr->flags); |
| 4932 | |
| 4933 | if (!addr->message) *ptr++ = 0; else |
| 4934 | ptr += sprintf(CS ptr, "%.1024s", addr->message) + 1; |
| 4935 | |
| 4936 | if (!addr->user_message) *ptr++ = 0; else |
| 4937 | ptr += sprintf(CS ptr, "%.1024s", addr->user_message) + 1; |
| 4938 | |
| 4939 | if (!addr->host_used) *ptr++ = 0; else |
| 4940 | { |
| 4941 | ptr += sprintf(CS ptr, "%.256s", addr->host_used->name) + 1; |
| 4942 | ptr += sprintf(CS ptr, "%.64s", addr->host_used->address) + 1; |
| 4943 | memcpy(ptr, &addr->host_used->port, sizeof(addr->host_used->port)); |
| 4944 | ptr += sizeof(addr->host_used->port); |
| 4945 | |
| 4946 | /* DNS lookup status */ |
| 4947 | *ptr++ = addr->host_used->dnssec==DS_YES ? '2' |
| 4948 | : addr->host_used->dnssec==DS_NO ? '1' : '0'; |
| 4949 | |
| 4950 | } |
| 4951 | rmt_dlv_checked_write(fd, 'A', '0', big_buffer, ptr - big_buffer); |
| 4952 | } |
| 4953 | |
| 4954 | /* Local interface address/port */ |
| 4955 | #ifdef EXPERIMENTAL_DSN_INFO |
| 4956 | if (sending_ip_address) |
| 4957 | #else |
| 4958 | if (LOGGING(incoming_interface) && sending_ip_address) |
| 4959 | #endif |
| 4960 | { |
| 4961 | uschar * ptr; |
| 4962 | ptr = big_buffer + sprintf(CS big_buffer, "%.128s", sending_ip_address) + 1; |
| 4963 | ptr += sprintf(CS ptr, "%d", sending_port) + 1; |
| 4964 | rmt_dlv_checked_write(fd, 'I', '0', big_buffer, ptr - big_buffer); |
| 4965 | } |
| 4966 | |
| 4967 | /* Add termination flag, close the pipe, and that's it. The character |
| 4968 | after 'Z' indicates whether continue_transport is now NULL or not. |
| 4969 | A change from non-NULL to NULL indicates a problem with a continuing |
| 4970 | connection. */ |
| 4971 | |
| 4972 | big_buffer[0] = continue_transport ? '1' : '0'; |
| 4973 | rmt_dlv_checked_write(fd, 'Z', '0', big_buffer, 1); |
| 4974 | (void)close(fd); |
| 4975 | exit(EXIT_SUCCESS); |
| 4976 | } |
| 4977 | |
| 4978 | /* Back in the mainline: close the unwanted half of the pipe. */ |
| 4979 | |
| 4980 | (void)close(pfd[pipe_write]); |
| 4981 | |
| 4982 | /* If we have a connection still open from a verify stage (lazy-close) |
| 4983 | release its TLS library context (if any) as responsibility was passed to |
| 4984 | the delivery child process. */ |
| 4985 | |
| 4986 | if (cutthrough.cctx.sock >= 0 && cutthrough.callout_hold_only) |
| 4987 | { |
| 4988 | #ifndef DISABLE_TLS |
| 4989 | if (cutthrough.is_tls) |
| 4990 | tls_close(cutthrough.cctx.tls_ctx, TLS_NO_SHUTDOWN); |
| 4991 | #endif |
| 4992 | (void) close(cutthrough.cctx.sock); |
| 4993 | release_cutthrough_connection(US"passed to transport proc"); |
| 4994 | } |
| 4995 | |
| 4996 | /* Fork failed; defer with error message */ |
| 4997 | |
| 4998 | if (pid == -1) |
| 4999 | { |
| 5000 | (void)close(pfd[pipe_read]); |
| 5001 | panicmsg = string_sprintf("fork failed for remote delivery to %s: %s", |
| 5002 | addr->domain, strerror(errno)); |
| 5003 | goto enq_continue; |
| 5004 | } |
| 5005 | |
| 5006 | /* Fork succeeded; increment the count, and remember relevant data for |
| 5007 | when the process finishes. */ |
| 5008 | |
| 5009 | parcount++; |
| 5010 | parlist[poffset].addrlist = parlist[poffset].addr = addr; |
| 5011 | parlist[poffset].pid = pid; |
| 5012 | parlist[poffset].fd = pfd[pipe_read]; |
| 5013 | parlist[poffset].done = FALSE; |
| 5014 | parlist[poffset].msg = NULL; |
| 5015 | parlist[poffset].return_path = return_path; |
| 5016 | |
| 5017 | /* If the process we've just started is sending a message down an existing |
| 5018 | channel, wait for it now. This ensures that only one such process runs at |
| 5019 | once, whatever the value of remote_max parallel. Otherwise, we might try to |
| 5020 | send two or more messages simultaneously down the same channel. This could |
| 5021 | happen if there are different domains that include the same host in otherwise |
| 5022 | different host lists. |
| 5023 | |
| 5024 | Also, if the transport closes down the channel, this information gets back |
| 5025 | (continue_transport gets set to NULL) before we consider any other addresses |
| 5026 | in this message. */ |
| 5027 | |
| 5028 | if (continue_transport) par_reduce(0, fallback); |
| 5029 | |
| 5030 | /* Otherwise, if we are running in the test harness, wait a bit, to let the |
| 5031 | newly created process get going before we create another process. This should |
| 5032 | ensure repeatability in the tests. Wait long enough for most cases to complete |
| 5033 | the transport. */ |
| 5034 | |
| 5035 | else testharness_pause_ms(600); |
| 5036 | |
| 5037 | continue; |
| 5038 | |
| 5039 | enq_continue: |
| 5040 | if (serialize_key) enq_end(serialize_key); |
| 5041 | panic_continue: |
| 5042 | remote_post_process(addr, LOG_MAIN|LOG_PANIC, panicmsg, fallback); |
| 5043 | continue; |
| 5044 | } |
| 5045 | |
| 5046 | /* Reached the end of the list of addresses. Wait for all the subprocesses that |
| 5047 | are still running and post-process their addresses. */ |
| 5048 | |
| 5049 | par_reduce(0, fallback); |
| 5050 | return TRUE; |
| 5051 | } |
| 5052 | |
| 5053 | |
| 5054 | |
| 5055 | |
| 5056 | /************************************************* |
| 5057 | * Split an address into local part and domain * |
| 5058 | *************************************************/ |
| 5059 | |
| 5060 | /* This function initializes an address for routing by splitting it up into a |
| 5061 | local part and a domain. The local part is set up twice - once in its original |
| 5062 | casing, and once in lower case, and it is dequoted. We also do the "percent |
| 5063 | hack" for configured domains. This may lead to a DEFER result if a lookup |
| 5064 | defers. When a percent-hacking takes place, we insert a copy of the original |
| 5065 | address as a new parent of this address, as if we have had a redirection. |
| 5066 | |
| 5067 | Argument: |
| 5068 | addr points to an addr_item block containing the address |
| 5069 | |
| 5070 | Returns: OK |
| 5071 | DEFER - could not determine if domain is %-hackable |
| 5072 | */ |
| 5073 | |
| 5074 | int |
| 5075 | deliver_split_address(address_item * addr) |
| 5076 | { |
| 5077 | uschar * address = addr->address; |
| 5078 | uschar * domain; |
| 5079 | uschar * t; |
| 5080 | int len; |
| 5081 | |
| 5082 | if (!(domain = Ustrrchr(address, '@'))) |
| 5083 | return DEFER; /* should always have a domain, but just in case... */ |
| 5084 | |
| 5085 | len = domain - address; |
| 5086 | addr->domain = string_copylc(domain+1); /* Domains are always caseless */ |
| 5087 | |
| 5088 | /* The implication in the RFCs (though I can't say I've seen it spelled out |
| 5089 | explicitly) is that quoting should be removed from local parts at the point |
| 5090 | where they are locally interpreted. [The new draft "821" is more explicit on |
| 5091 | this, Jan 1999.] We know the syntax is valid, so this can be done by simply |
| 5092 | removing quoting backslashes and any unquoted doublequotes. */ |
| 5093 | |
| 5094 | t = addr->cc_local_part = store_get(len+1, is_tainted(address)); |
| 5095 | while(len-- > 0) |
| 5096 | { |
| 5097 | int c = *address++; |
| 5098 | if (c == '\"') continue; |
| 5099 | if (c == '\\') |
| 5100 | { |
| 5101 | *t++ = *address++; |
| 5102 | len--; |
| 5103 | } |
| 5104 | else *t++ = c; |
| 5105 | } |
| 5106 | *t = 0; |
| 5107 | |
| 5108 | /* We do the percent hack only for those domains that are listed in |
| 5109 | percent_hack_domains. A loop is required, to copy with multiple %-hacks. */ |
| 5110 | |
| 5111 | if (percent_hack_domains) |
| 5112 | { |
| 5113 | int rc; |
| 5114 | uschar *new_address = NULL; |
| 5115 | uschar *local_part = addr->cc_local_part; |
| 5116 | |
| 5117 | deliver_domain = addr->domain; /* set $domain */ |
| 5118 | |
| 5119 | while ( (rc = match_isinlist(deliver_domain, (const uschar **)&percent_hack_domains, 0, |
| 5120 | &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL)) |
| 5121 | == OK |
| 5122 | && (t = Ustrrchr(local_part, '%')) != NULL |
| 5123 | ) |
| 5124 | { |
| 5125 | new_address = string_copy(local_part); |
| 5126 | new_address[t - local_part] = '@'; |
| 5127 | deliver_domain = string_copylc(t+1); |
| 5128 | local_part = string_copyn(local_part, t - local_part); |
| 5129 | } |
| 5130 | |
| 5131 | if (rc == DEFER) return DEFER; /* lookup deferred */ |
| 5132 | |
| 5133 | /* If hackery happened, set up new parent and alter the current address. */ |
| 5134 | |
| 5135 | if (new_address) |
| 5136 | { |
| 5137 | address_item *new_parent = store_get(sizeof(address_item), FALSE); |
| 5138 | *new_parent = *addr; |
| 5139 | addr->parent = new_parent; |
| 5140 | new_parent->child_count = 1; |
| 5141 | addr->address = new_address; |
| 5142 | addr->unique = string_copy(new_address); |
| 5143 | addr->domain = deliver_domain; |
| 5144 | addr->cc_local_part = local_part; |
| 5145 | DEBUG(D_deliver) debug_printf("%%-hack changed address to: %s\n", |
| 5146 | addr->address); |
| 5147 | } |
| 5148 | } |
| 5149 | |
| 5150 | /* Create the lowercased version of the final local part, and make that the |
| 5151 | default one to be used. */ |
| 5152 | |
| 5153 | addr->local_part = addr->lc_local_part = string_copylc(addr->cc_local_part); |
| 5154 | return OK; |
| 5155 | } |
| 5156 | |
| 5157 | |
| 5158 | |
| 5159 | |
| 5160 | /************************************************* |
| 5161 | * Get next error message text * |
| 5162 | *************************************************/ |
| 5163 | |
| 5164 | /* If f is not NULL, read the next "paragraph", from a customized error message |
| 5165 | text file, terminated by a line containing ****, and expand it. |
| 5166 | |
| 5167 | Arguments: |
| 5168 | f NULL or a file to read from |
| 5169 | which string indicating which string (for errors) |
| 5170 | |
| 5171 | Returns: NULL or an expanded string |
| 5172 | */ |
| 5173 | |
| 5174 | static uschar * |
| 5175 | next_emf(FILE *f, uschar *which) |
| 5176 | { |
| 5177 | uschar *yield; |
| 5178 | gstring * para; |
| 5179 | uschar buffer[256]; |
| 5180 | |
| 5181 | if (!f) return NULL; |
| 5182 | |
| 5183 | if (!Ufgets(buffer, sizeof(buffer), f) || Ustrcmp(buffer, "****\n") == 0) |
| 5184 | return NULL; |
| 5185 | |
| 5186 | para = string_get(256); |
| 5187 | for (;;) |
| 5188 | { |
| 5189 | para = string_cat(para, buffer); |
| 5190 | if (!Ufgets(buffer, sizeof(buffer), f) || Ustrcmp(buffer, "****\n") == 0) |
| 5191 | break; |
| 5192 | } |
| 5193 | if ((yield = expand_string(string_from_gstring(para)))) |
| 5194 | return yield; |
| 5195 | |
| 5196 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand string from " |
| 5197 | "bounce_message_file or warn_message_file (%s): %s", which, |
| 5198 | expand_string_message); |
| 5199 | return NULL; |
| 5200 | } |
| 5201 | |
| 5202 | |
| 5203 | |
| 5204 | |
| 5205 | /************************************************* |
| 5206 | * Close down a passed transport channel * |
| 5207 | *************************************************/ |
| 5208 | |
| 5209 | /* This function is called when a passed transport channel cannot be used. |
| 5210 | It attempts to close it down tidily. The yield is always DELIVER_NOT_ATTEMPTED |
| 5211 | so that the function call can be the argument of a "return" statement. |
| 5212 | |
| 5213 | Arguments: None |
| 5214 | Returns: DELIVER_NOT_ATTEMPTED |
| 5215 | */ |
| 5216 | |
| 5217 | static int |
| 5218 | continue_closedown(void) |
| 5219 | { |
| 5220 | if (continue_transport) |
| 5221 | for (transport_instance * t = transports; t; t = t->next) |
| 5222 | if (Ustrcmp(t->name, continue_transport) == 0) |
| 5223 | { |
| 5224 | if (t->info->closedown) (t->info->closedown)(t); |
| 5225 | break; |
| 5226 | } |
| 5227 | return DELIVER_NOT_ATTEMPTED; |
| 5228 | } |
| 5229 | |
| 5230 | |
| 5231 | |
| 5232 | |
| 5233 | /************************************************* |
| 5234 | * Print address information * |
| 5235 | *************************************************/ |
| 5236 | |
| 5237 | /* This function is called to output an address, or information about an |
| 5238 | address, for bounce or defer messages. If the hide_child flag is set, all we |
| 5239 | output is the original ancestor address. |
| 5240 | |
| 5241 | Arguments: |
| 5242 | addr points to the address |
| 5243 | f the FILE to print to |
| 5244 | si an initial string |
| 5245 | sc a continuation string for before "generated" |
| 5246 | se an end string |
| 5247 | |
| 5248 | Returns: TRUE if the address is not hidden |
| 5249 | */ |
| 5250 | |
| 5251 | static BOOL |
| 5252 | print_address_information(address_item *addr, FILE *f, uschar *si, uschar *sc, |
| 5253 | uschar *se) |
| 5254 | { |
| 5255 | BOOL yield = TRUE; |
| 5256 | uschar *printed = US""; |
| 5257 | address_item *ancestor = addr; |
| 5258 | while (ancestor->parent) ancestor = ancestor->parent; |
| 5259 | |
| 5260 | fprintf(f, "%s", CS si); |
| 5261 | |
| 5262 | if (addr->parent && testflag(addr, af_hide_child)) |
| 5263 | { |
| 5264 | printed = US"an undisclosed address"; |
| 5265 | yield = FALSE; |
| 5266 | } |
| 5267 | else if (!testflag(addr, af_pfr) || !addr->parent) |
| 5268 | printed = addr->address; |
| 5269 | |
| 5270 | else |
| 5271 | { |
| 5272 | uschar *s = addr->address; |
| 5273 | uschar *ss; |
| 5274 | |
| 5275 | if (addr->address[0] == '>') { ss = US"mail"; s++; } |
| 5276 | else if (addr->address[0] == '|') ss = US"pipe"; |
| 5277 | else ss = US"save"; |
| 5278 | |
| 5279 | fprintf(f, "%s to %s%sgenerated by ", ss, s, sc); |
| 5280 | printed = addr->parent->address; |
| 5281 | } |
| 5282 | |
| 5283 | fprintf(f, "%s", CS string_printing(printed)); |
| 5284 | |
| 5285 | if (ancestor != addr) |
| 5286 | { |
| 5287 | uschar *original = ancestor->onetime_parent; |
| 5288 | if (!original) original= ancestor->address; |
| 5289 | if (strcmpic(original, printed) != 0) |
| 5290 | fprintf(f, "%s(%sgenerated from %s)", sc, |
| 5291 | ancestor != addr->parent ? "ultimately " : "", |
| 5292 | string_printing(original)); |
| 5293 | } |
| 5294 | |
| 5295 | if (addr->host_used) |
| 5296 | fprintf(f, "\n host %s [%s]", |
| 5297 | addr->host_used->name, addr->host_used->address); |
| 5298 | |
| 5299 | fprintf(f, "%s", CS se); |
| 5300 | return yield; |
| 5301 | } |
| 5302 | |
| 5303 | |
| 5304 | |
| 5305 | |
| 5306 | |
| 5307 | /************************************************* |
| 5308 | * Print error for an address * |
| 5309 | *************************************************/ |
| 5310 | |
| 5311 | /* This function is called to print the error information out of an address for |
| 5312 | a bounce or a warning message. It tries to format the message reasonably by |
| 5313 | introducing newlines. All lines are indented by 4; the initial printing |
| 5314 | position must be set before calling. |
| 5315 | |
| 5316 | This function used always to print the error. Nowadays we want to restrict it |
| 5317 | to cases such as LMTP/SMTP errors from a remote host, and errors from :fail: |
| 5318 | and filter "fail". We no longer pass other information willy-nilly in bounce |
| 5319 | and warning messages. Text in user_message is always output; text in message |
| 5320 | only if the af_pass_message flag is set. |
| 5321 | |
| 5322 | Arguments: |
| 5323 | addr the address |
| 5324 | f the FILE to print on |
| 5325 | t some leading text |
| 5326 | |
| 5327 | Returns: nothing |
| 5328 | */ |
| 5329 | |
| 5330 | static void |
| 5331 | print_address_error(address_item *addr, FILE *f, uschar *t) |
| 5332 | { |
| 5333 | int count = Ustrlen(t); |
| 5334 | uschar *s = testflag(addr, af_pass_message) ? addr->message : NULL; |
| 5335 | |
| 5336 | if (!s && !(s = addr->user_message)) |
| 5337 | return; |
| 5338 | |
| 5339 | fprintf(f, "\n %s", t); |
| 5340 | |
| 5341 | while (*s) |
| 5342 | if (*s == '\\' && s[1] == 'n') |
| 5343 | { |
| 5344 | fprintf(f, "\n "); |
| 5345 | s += 2; |
| 5346 | count = 0; |
| 5347 | } |
| 5348 | else |
| 5349 | { |
| 5350 | fputc(*s, f); |
| 5351 | count++; |
| 5352 | if (*s++ == ':' && isspace(*s) && count > 45) |
| 5353 | { |
| 5354 | fprintf(f, "\n "); /* sic (because space follows) */ |
| 5355 | count = 0; |
| 5356 | } |
| 5357 | } |
| 5358 | } |
| 5359 | |
| 5360 | |
| 5361 | /*********************************************************** |
| 5362 | * Print Diagnostic-Code for an address * |
| 5363 | ************************************************************/ |
| 5364 | |
| 5365 | /* This function is called to print the error information out of an address for |
| 5366 | a bounce or a warning message. It tries to format the message reasonably as |
| 5367 | required by RFC 3461 by adding a space after each newline |
| 5368 | |
| 5369 | it uses the same logic as print_address_error() above. if af_pass_message is true |
| 5370 | and addr->message is set it uses the remote host answer. if not addr->user_message |
| 5371 | is used instead if available. |
| 5372 | |
| 5373 | Arguments: |
| 5374 | addr the address |
| 5375 | f the FILE to print on |
| 5376 | |
| 5377 | Returns: nothing |
| 5378 | */ |
| 5379 | |
| 5380 | static void |
| 5381 | print_dsn_diagnostic_code(const address_item *addr, FILE *f) |
| 5382 | { |
| 5383 | uschar * s = testflag(addr, af_pass_message) ? addr->message : NULL; |
| 5384 | unsigned cnt; |
| 5385 | |
| 5386 | /* af_pass_message and addr->message set ? print remote host answer */ |
| 5387 | if (s) |
| 5388 | { |
| 5389 | DEBUG(D_deliver) |
| 5390 | debug_printf("DSN Diagnostic-Code: addr->message = %s\n", addr->message); |
| 5391 | |
| 5392 | /* search first ": ". we assume to find the remote-MTA answer there */ |
| 5393 | if (!(s = Ustrstr(addr->message, ": "))) |
| 5394 | return; /* not found, bail out */ |
| 5395 | s += 2; /* skip ": " */ |
| 5396 | cnt = fprintf(f, "Diagnostic-Code: smtp; "); |
| 5397 | } |
| 5398 | /* no message available. do nothing */ |
| 5399 | else return; |
| 5400 | |
| 5401 | while (*s) |
| 5402 | { |
| 5403 | if (cnt > 950) /* RFC line length limit: 998 */ |
| 5404 | { |
| 5405 | DEBUG(D_deliver) debug_printf("print_dsn_diagnostic_code() truncated line\n"); |
| 5406 | fputs("[truncated]", f); |
| 5407 | break; |
| 5408 | } |
| 5409 | |
| 5410 | if (*s == '\\' && s[1] == 'n') |
| 5411 | { |
| 5412 | fputs("\n ", f); /* as defined in RFC 3461 */ |
| 5413 | s += 2; |
| 5414 | cnt += 2; |
| 5415 | } |
| 5416 | else |
| 5417 | { |
| 5418 | fputc(*s++, f); |
| 5419 | cnt++; |
| 5420 | } |
| 5421 | } |
| 5422 | |
| 5423 | fputc('\n', f); |
| 5424 | } |
| 5425 | |
| 5426 | |
| 5427 | /************************************************* |
| 5428 | * Check list of addresses for duplication * |
| 5429 | *************************************************/ |
| 5430 | |
| 5431 | /* This function was introduced when the test for duplicate addresses that are |
| 5432 | not pipes, files, or autoreplies was moved from the middle of routing to when |
| 5433 | routing was complete. That was to fix obscure cases when the routing history |
| 5434 | affects the subsequent routing of identical addresses. This function is called |
| 5435 | after routing, to check that the final routed addresses are not duplicates. |
| 5436 | |
| 5437 | If we detect a duplicate, we remember what it is a duplicate of. Note that |
| 5438 | pipe, file, and autoreply de-duplication is handled during routing, so we must |
| 5439 | leave such "addresses" alone here, as otherwise they will incorrectly be |
| 5440 | discarded. |
| 5441 | |
| 5442 | Argument: address of list anchor |
| 5443 | Returns: nothing |
| 5444 | */ |
| 5445 | |
| 5446 | static void |
| 5447 | do_duplicate_check(address_item **anchor) |
| 5448 | { |
| 5449 | address_item *addr; |
| 5450 | while ((addr = *anchor)) |
| 5451 | { |
| 5452 | tree_node *tnode; |
| 5453 | if (testflag(addr, af_pfr)) |
| 5454 | { |
| 5455 | anchor = &(addr->next); |
| 5456 | } |
| 5457 | else if ((tnode = tree_search(tree_duplicates, addr->unique))) |
| 5458 | { |
| 5459 | DEBUG(D_deliver|D_route) |
| 5460 | debug_printf("%s is a duplicate address: discarded\n", addr->unique); |
| 5461 | *anchor = addr->next; |
| 5462 | addr->dupof = tnode->data.ptr; |
| 5463 | addr->next = addr_duplicate; |
| 5464 | addr_duplicate = addr; |
| 5465 | } |
| 5466 | else |
| 5467 | { |
| 5468 | tree_add_duplicate(addr->unique, addr); |
| 5469 | anchor = &(addr->next); |
| 5470 | } |
| 5471 | } |
| 5472 | } |
| 5473 | |
| 5474 | |
| 5475 | |
| 5476 | |
| 5477 | /************************************************/ |
| 5478 | |
| 5479 | static void |
| 5480 | print_dsn_addr_action(FILE * f, address_item * addr, |
| 5481 | uschar * action, uschar * status) |
| 5482 | { |
| 5483 | address_item * pa; |
| 5484 | |
| 5485 | if (addr->dsn_orcpt) |
| 5486 | fprintf(f,"Original-Recipient: %s\n", addr->dsn_orcpt); |
| 5487 | |
| 5488 | for (pa = addr; pa->parent; ) pa = pa->parent; |
| 5489 | fprintf(f, "Action: %s\n" |
| 5490 | "Final-Recipient: rfc822;%s\n" |
| 5491 | "Status: %s\n", |
| 5492 | action, pa->address, status); |
| 5493 | } |
| 5494 | |
| 5495 | |
| 5496 | |
| 5497 | /* When running in the test harness, there's an option that allows us to |
| 5498 | fudge this time so as to get repeatability of the tests. Take the first |
| 5499 | time off the list. In queue runs, the list pointer gets updated in the |
| 5500 | calling process. */ |
| 5501 | |
| 5502 | int |
| 5503 | test_harness_fudged_queue_time(int actual_time) |
| 5504 | { |
| 5505 | int qt; |
| 5506 | if ( f.running_in_test_harness && *fudged_queue_times |
| 5507 | && (qt = readconf_readtime(fudged_queue_times, '/', FALSE)) >= 0) |
| 5508 | { |
| 5509 | DEBUG(D_deliver) debug_printf("fudged queue_times = %s\n", |
| 5510 | fudged_queue_times); |
| 5511 | return qt; |
| 5512 | } |
| 5513 | return actual_time; |
| 5514 | } |
| 5515 | |
| 5516 | /************************************************/ |
| 5517 | |
| 5518 | static FILE * |
| 5519 | expand_open(const uschar * filename, |
| 5520 | const uschar * varname, const uschar * reason) |
| 5521 | { |
| 5522 | const uschar * s = expand_cstring(filename); |
| 5523 | FILE * fp = NULL; |
| 5524 | |
| 5525 | if (!s || !*s) |
| 5526 | log_write(0, LOG_MAIN|LOG_PANIC, |
| 5527 | "Failed to expand %s: '%s'\n", varname, filename); |
| 5528 | else if (*s != '/' || is_tainted(s)) |
| 5529 | log_write(0, LOG_MAIN|LOG_PANIC, |
| 5530 | "%s is not %s after expansion: '%s'\n", |
| 5531 | varname, *s == '/' ? "untainted" : "absolute", s); |
| 5532 | else if (!(fp = Ufopen(s, "rb"))) |
| 5533 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for %s " |
| 5534 | "message texts: %s", s, reason, strerror(errno)); |
| 5535 | return fp; |
| 5536 | } |
| 5537 | |
| 5538 | /************************************************* |
| 5539 | * Deliver one message * |
| 5540 | *************************************************/ |
| 5541 | |
| 5542 | /* This is the function which is called when a message is to be delivered. It |
| 5543 | is passed the id of the message. It is possible that the message no longer |
| 5544 | exists, if some other process has delivered it, and it is also possible that |
| 5545 | the message is being worked on by another process, in which case the data file |
| 5546 | will be locked. |
| 5547 | |
| 5548 | If no delivery is attempted for any of the above reasons, the function returns |
| 5549 | DELIVER_NOT_ATTEMPTED. |
| 5550 | |
| 5551 | If the give_up flag is set true, do not attempt any deliveries, but instead |
| 5552 | fail all outstanding addresses and return the message to the sender (or |
| 5553 | whoever). |
| 5554 | |
| 5555 | A delivery operation has a process all to itself; we never deliver more than |
| 5556 | one message in the same process. Therefore we needn't worry too much about |
| 5557 | store leakage. |
| 5558 | |
| 5559 | Liable to be called as root. |
| 5560 | |
| 5561 | Arguments: |
| 5562 | id the id of the message to be delivered |
| 5563 | forced TRUE if delivery was forced by an administrator; this overrides |
| 5564 | retry delays and causes a delivery to be tried regardless |
| 5565 | give_up TRUE if an administrator has requested that delivery attempts |
| 5566 | be abandoned |
| 5567 | |
| 5568 | Returns: When the global variable mua_wrapper is FALSE: |
| 5569 | DELIVER_ATTEMPTED_NORMAL if a delivery attempt was made |
| 5570 | DELIVER_NOT_ATTEMPTED otherwise (see comment above) |
| 5571 | When the global variable mua_wrapper is TRUE: |
| 5572 | DELIVER_MUA_SUCCEEDED if delivery succeeded |
| 5573 | DELIVER_MUA_FAILED if delivery failed |
| 5574 | DELIVER_NOT_ATTEMPTED if not attempted (should not occur) |
| 5575 | */ |
| 5576 | |
| 5577 | int |
| 5578 | deliver_message(uschar *id, BOOL forced, BOOL give_up) |
| 5579 | { |
| 5580 | int i, rc; |
| 5581 | int final_yield = DELIVER_ATTEMPTED_NORMAL; |
| 5582 | time_t now = time(NULL); |
| 5583 | address_item *addr_last = NULL; |
| 5584 | uschar *filter_message = NULL; |
| 5585 | int process_recipients = RECIP_ACCEPT; |
| 5586 | open_db dbblock; |
| 5587 | open_db *dbm_file; |
| 5588 | extern int acl_where; |
| 5589 | uschar *info; |
| 5590 | |
| 5591 | #ifdef MEASURE_TIMING |
| 5592 | report_time_since(×tamp_startup, US"delivery start"); /* testcase 0022, 2100 */ |
| 5593 | #endif |
| 5594 | |
| 5595 | info = queue_run_pid == (pid_t)0 |
| 5596 | ? string_sprintf("delivering %s", id) |
| 5597 | : string_sprintf("delivering %s (queue run pid %d)", id, queue_run_pid); |
| 5598 | |
| 5599 | /* If the D_process_info bit is on, set_process_info() will output debugging |
| 5600 | information. If not, we want to show this initial information if D_deliver or |
| 5601 | D_queue_run is set or in verbose mode. */ |
| 5602 | |
| 5603 | set_process_info("%s", info); |
| 5604 | |
| 5605 | if ( !(debug_selector & D_process_info) |
| 5606 | && (debug_selector & (D_deliver|D_queue_run|D_v)) |
| 5607 | ) |
| 5608 | debug_printf("%s\n", info); |
| 5609 | |
| 5610 | /* Ensure that we catch any subprocesses that are created. Although Exim |
| 5611 | sets SIG_DFL as its initial default, some routes through the code end up |
| 5612 | here with it set to SIG_IGN - cases where a non-synchronous delivery process |
| 5613 | has been forked, but no re-exec has been done. We use sigaction rather than |
| 5614 | plain signal() on those OS where SA_NOCLDWAIT exists, because we want to be |
| 5615 | sure it is turned off. (There was a problem on AIX with this.) */ |
| 5616 | |
| 5617 | #ifdef SA_NOCLDWAIT |
| 5618 | { |
| 5619 | struct sigaction act; |
| 5620 | act.sa_handler = SIG_DFL; |
| 5621 | sigemptyset(&(act.sa_mask)); |
| 5622 | act.sa_flags = 0; |
| 5623 | sigaction(SIGCHLD, &act, NULL); |
| 5624 | } |
| 5625 | #else |
| 5626 | signal(SIGCHLD, SIG_DFL); |
| 5627 | #endif |
| 5628 | |
| 5629 | /* Make the forcing flag available for routers and transports, set up the |
| 5630 | global message id field, and initialize the count for returned files and the |
| 5631 | message size. This use of strcpy() is OK because the length id is checked when |
| 5632 | it is obtained from a command line (the -M or -q options), and otherwise it is |
| 5633 | known to be a valid message id. */ |
| 5634 | |
| 5635 | if (id != message_id) |
| 5636 | Ustrcpy(message_id, id); |
| 5637 | f.deliver_force = forced; |
| 5638 | return_count = 0; |
| 5639 | message_size = 0; |
| 5640 | |
| 5641 | /* Initialize some flags */ |
| 5642 | |
| 5643 | update_spool = FALSE; |
| 5644 | remove_journal = TRUE; |
| 5645 | |
| 5646 | /* Set a known context for any ACLs we call via expansions */ |
| 5647 | acl_where = ACL_WHERE_DELIVERY; |
| 5648 | |
| 5649 | /* Reset the random number generator, so that if several delivery processes are |
| 5650 | started from a queue runner that has already used random numbers (for sorting), |
| 5651 | they don't all get the same sequence. */ |
| 5652 | |
| 5653 | random_seed = 0; |
| 5654 | |
| 5655 | /* Open and lock the message's data file. Exim locks on this one because the |
| 5656 | header file may get replaced as it is re-written during the delivery process. |
| 5657 | Any failures cause messages to be written to the log, except for missing files |
| 5658 | while queue running - another process probably completed delivery. As part of |
| 5659 | opening the data file, message_subdir gets set. */ |
| 5660 | |
| 5661 | if ((deliver_datafile = spool_open_datafile(id)) < 0) |
| 5662 | return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */ |
| 5663 | |
| 5664 | /* The value of message_size at this point has been set to the data length, |
| 5665 | plus one for the blank line that notionally precedes the data. */ |
| 5666 | |
| 5667 | /* Now read the contents of the header file, which will set up the headers in |
| 5668 | store, and also the list of recipients and the tree of non-recipients and |
| 5669 | assorted flags. It updates message_size. If there is a reading or format error, |
| 5670 | give up; if the message has been around for sufficiently long, remove it. */ |
| 5671 | |
| 5672 | { |
| 5673 | uschar * spoolname = string_sprintf("%s-H", id); |
| 5674 | if ((rc = spool_read_header(spoolname, TRUE, TRUE)) != spool_read_OK) |
| 5675 | { |
| 5676 | if (errno == ERRNO_SPOOLFORMAT) |
| 5677 | { |
| 5678 | struct stat statbuf; |
| 5679 | if (Ustat(spool_fname(US"input", message_subdir, spoolname, US""), |
| 5680 | &statbuf) == 0) |
| 5681 | log_write(0, LOG_MAIN, "Format error in spool file %s: " |
| 5682 | "size=" OFF_T_FMT, spoolname, statbuf.st_size); |
| 5683 | else |
| 5684 | log_write(0, LOG_MAIN, "Format error in spool file %s", spoolname); |
| 5685 | } |
| 5686 | else |
| 5687 | log_write(0, LOG_MAIN, "Error reading spool file %s: %s", spoolname, |
| 5688 | strerror(errno)); |
| 5689 | |
| 5690 | /* If we managed to read the envelope data, received_time contains the |
| 5691 | time the message was received. Otherwise, we can calculate it from the |
| 5692 | message id. */ |
| 5693 | |
| 5694 | if (rc != spool_read_hdrerror) |
| 5695 | { |
| 5696 | received_time.tv_sec = received_time.tv_usec = 0; |
| 5697 | /*XXX subsec precision?*/ |
| 5698 | for (i = 0; i < 6; i++) |
| 5699 | received_time.tv_sec = received_time.tv_sec * BASE_62 + tab62[id[i] - '0']; |
| 5700 | } |
| 5701 | |
| 5702 | /* If we've had this malformed message too long, sling it. */ |
| 5703 | |
| 5704 | if (now - received_time.tv_sec > keep_malformed) |
| 5705 | { |
| 5706 | Uunlink(spool_fname(US"msglog", message_subdir, id, US"")); |
| 5707 | Uunlink(spool_fname(US"input", message_subdir, id, US"-D")); |
| 5708 | Uunlink(spool_fname(US"input", message_subdir, id, US"-H")); |
| 5709 | Uunlink(spool_fname(US"input", message_subdir, id, US"-J")); |
| 5710 | log_write(0, LOG_MAIN, "Message removed because older than %s", |
| 5711 | readconf_printtime(keep_malformed)); |
| 5712 | } |
| 5713 | |
| 5714 | (void)close(deliver_datafile); |
| 5715 | deliver_datafile = -1; |
| 5716 | return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */ |
| 5717 | } |
| 5718 | } |
| 5719 | |
| 5720 | /* The spool header file has been read. Look to see if there is an existing |
| 5721 | journal file for this message. If there is, it means that a previous delivery |
| 5722 | attempt crashed (program or host) before it could update the spool header file. |
| 5723 | Read the list of delivered addresses from the journal and add them to the |
| 5724 | nonrecipients tree. Then update the spool file. We can leave the journal in |
| 5725 | existence, as it will get further successful deliveries added to it in this |
| 5726 | run, and it will be deleted if this function gets to its end successfully. |
| 5727 | Otherwise it might be needed again. */ |
| 5728 | |
| 5729 | { |
| 5730 | uschar * fname = spool_fname(US"input", message_subdir, id, US"-J"); |
| 5731 | FILE * jread; |
| 5732 | |
| 5733 | if ( (journal_fd = Uopen(fname, O_RDWR|O_APPEND |
| 5734 | #ifdef O_CLOEXEC |
| 5735 | | O_CLOEXEC |
| 5736 | #endif |
| 5737 | #ifdef O_NOFOLLOW |
| 5738 | | O_NOFOLLOW |
| 5739 | #endif |
| 5740 | , SPOOL_MODE)) >= 0 |
| 5741 | && lseek(journal_fd, 0, SEEK_SET) == 0 |
| 5742 | && (jread = fdopen(journal_fd, "rb")) |
| 5743 | ) |
| 5744 | { |
| 5745 | while (Ufgets(big_buffer, big_buffer_size, jread)) |
| 5746 | { |
| 5747 | int n = Ustrlen(big_buffer); |
| 5748 | big_buffer[n-1] = 0; |
| 5749 | tree_add_nonrecipient(big_buffer); |
| 5750 | DEBUG(D_deliver) debug_printf("Previously delivered address %s taken from " |
| 5751 | "journal file\n", big_buffer); |
| 5752 | } |
| 5753 | rewind(jread); |
| 5754 | if ((journal_fd = dup(fileno(jread))) < 0) |
| 5755 | journal_fd = fileno(jread); |
| 5756 | else |
| 5757 | (void) fclose(jread); /* Try to not leak the FILE resource */ |
| 5758 | |
| 5759 | /* Panic-dies on error */ |
| 5760 | (void)spool_write_header(message_id, SW_DELIVERING, NULL); |
| 5761 | } |
| 5762 | else if (errno != ENOENT) |
| 5763 | { |
| 5764 | log_write(0, LOG_MAIN|LOG_PANIC, "attempt to open journal for reading gave: " |
| 5765 | "%s", strerror(errno)); |
| 5766 | return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */ |
| 5767 | } |
| 5768 | |
| 5769 | /* A null recipients list indicates some kind of disaster. */ |
| 5770 | |
| 5771 | if (!recipients_list) |
| 5772 | { |
| 5773 | (void)close(deliver_datafile); |
| 5774 | deliver_datafile = -1; |
| 5775 | log_write(0, LOG_MAIN, "Spool error: no recipients for %s", fname); |
| 5776 | return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */ |
| 5777 | } |
| 5778 | } |
| 5779 | |
| 5780 | |
| 5781 | /* Handle a message that is frozen. There are a number of different things that |
| 5782 | can happen, but in the default situation, unless forced, no delivery is |
| 5783 | attempted. */ |
| 5784 | |
| 5785 | if (f.deliver_freeze) |
| 5786 | { |
| 5787 | #ifdef SUPPORT_MOVE_FROZEN_MESSAGES |
| 5788 | /* Moving to another directory removes the message from Exim's view. Other |
| 5789 | tools must be used to deal with it. Logging of this action happens in |
| 5790 | spool_move_message() and its subfunctions. */ |
| 5791 | |
| 5792 | if ( move_frozen_messages |
| 5793 | && spool_move_message(id, message_subdir, US"", US"F") |
| 5794 | ) |
| 5795 | return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */ |
| 5796 | #endif |
| 5797 | |
| 5798 | /* For all frozen messages (bounces or not), timeout_frozen_after sets the |
| 5799 | maximum time to keep messages that are frozen. Thaw if we reach it, with a |
| 5800 | flag causing all recipients to be failed. The time is the age of the |
| 5801 | message, not the time since freezing. */ |
| 5802 | |
| 5803 | if (timeout_frozen_after > 0 && message_age >= timeout_frozen_after) |
| 5804 | { |
| 5805 | log_write(0, LOG_MAIN, "cancelled by timeout_frozen_after"); |
| 5806 | process_recipients = RECIP_FAIL_TIMEOUT; |
| 5807 | } |
| 5808 | |
| 5809 | /* For bounce messages (and others with no sender), thaw if the error message |
| 5810 | ignore timer is exceeded. The message will be discarded if this delivery |
| 5811 | fails. */ |
| 5812 | |
| 5813 | else if (!*sender_address && message_age >= ignore_bounce_errors_after) |
| 5814 | log_write(0, LOG_MAIN, "Unfrozen by errmsg timer"); |
| 5815 | |
| 5816 | /* If this is a bounce message, or there's no auto thaw, or we haven't |
| 5817 | reached the auto thaw time yet, and this delivery is not forced by an admin |
| 5818 | user, do not attempt delivery of this message. Note that forced is set for |
| 5819 | continuing messages down the same channel, in order to skip load checking and |
| 5820 | ignore hold domains, but we don't want unfreezing in that case. */ |
| 5821 | |
| 5822 | else |
| 5823 | { |
| 5824 | if ( ( sender_address[0] == 0 |
| 5825 | || auto_thaw <= 0 |
| 5826 | || now <= deliver_frozen_at + auto_thaw |
| 5827 | ) |
| 5828 | && ( !forced || !f.deliver_force_thaw |
| 5829 | || !f.admin_user || continue_hostname |
| 5830 | ) ) |
| 5831 | { |
| 5832 | (void)close(deliver_datafile); |
| 5833 | deliver_datafile = -1; |
| 5834 | log_write(L_skip_delivery, LOG_MAIN, "Message is frozen"); |
| 5835 | return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */ |
| 5836 | } |
| 5837 | |
| 5838 | /* If delivery was forced (by an admin user), assume a manual thaw. |
| 5839 | Otherwise it's an auto thaw. */ |
| 5840 | |
| 5841 | if (forced) |
| 5842 | { |
| 5843 | f.deliver_manual_thaw = TRUE; |
| 5844 | log_write(0, LOG_MAIN, "Unfrozen by forced delivery"); |
| 5845 | } |
| 5846 | else log_write(0, LOG_MAIN, "Unfrozen by auto-thaw"); |
| 5847 | } |
| 5848 | |
| 5849 | /* We get here if any of the rules for unfreezing have triggered. */ |
| 5850 | |
| 5851 | f.deliver_freeze = FALSE; |
| 5852 | update_spool = TRUE; |
| 5853 | } |
| 5854 | |
| 5855 | |
| 5856 | /* Open the message log file if we are using them. This records details of |
| 5857 | deliveries, deferments, and failures for the benefit of the mail administrator. |
| 5858 | The log is not used by exim itself to track the progress of a message; that is |
| 5859 | done by rewriting the header spool file. */ |
| 5860 | |
| 5861 | if (message_logs) |
| 5862 | { |
| 5863 | uschar * fname = spool_fname(US"msglog", message_subdir, id, US""); |
| 5864 | uschar * error; |
| 5865 | int fd; |
| 5866 | |
| 5867 | if ((fd = open_msglog_file(fname, SPOOL_MODE, &error)) < 0) |
| 5868 | { |
| 5869 | log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't %s message log %s: %s", error, |
| 5870 | fname, strerror(errno)); |
| 5871 | return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */ |
| 5872 | } |
| 5873 | |
| 5874 | /* Make a C stream out of it. */ |
| 5875 | |
| 5876 | if (!(message_log = fdopen(fd, "a"))) |
| 5877 | { |
| 5878 | log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't fdopen message log %s: %s", |
| 5879 | fname, strerror(errno)); |
| 5880 | return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */ |
| 5881 | } |
| 5882 | } |
| 5883 | |
| 5884 | |
| 5885 | /* If asked to give up on a message, log who did it, and set the action for all |
| 5886 | the addresses. */ |
| 5887 | |
| 5888 | if (give_up) |
| 5889 | { |
| 5890 | struct passwd *pw = getpwuid(real_uid); |
| 5891 | log_write(0, LOG_MAIN, "cancelled by %s", |
| 5892 | pw ? US pw->pw_name : string_sprintf("uid %ld", (long int)real_uid)); |
| 5893 | process_recipients = RECIP_FAIL; |
| 5894 | } |
| 5895 | |
| 5896 | /* Otherwise, if there are too many Received: headers, fail all recipients. */ |
| 5897 | |
| 5898 | else if (received_count > received_headers_max) |
| 5899 | process_recipients = RECIP_FAIL_LOOP; |
| 5900 | |
| 5901 | /* Otherwise, if a system-wide, address-independent message filter is |
| 5902 | specified, run it now, except in the case when we are failing all recipients as |
| 5903 | a result of timeout_frozen_after. If the system filter yields "delivered", then |
| 5904 | ignore the true recipients of the message. Failure of the filter file is |
| 5905 | logged, and the delivery attempt fails. */ |
| 5906 | |
| 5907 | else if (system_filter && process_recipients != RECIP_FAIL_TIMEOUT) |
| 5908 | { |
| 5909 | int rc; |
| 5910 | int filtertype; |
| 5911 | ugid_block ugid; |
| 5912 | redirect_block redirect; |
| 5913 | |
| 5914 | if (system_filter_uid_set) |
| 5915 | { |
| 5916 | ugid.uid = system_filter_uid; |
| 5917 | ugid.gid = system_filter_gid; |
| 5918 | ugid.uid_set = ugid.gid_set = TRUE; |
| 5919 | } |
| 5920 | else |
| 5921 | ugid.uid_set = ugid.gid_set = FALSE; |
| 5922 | |
| 5923 | return_path = sender_address; |
| 5924 | f.enable_dollar_recipients = TRUE; /* Permit $recipients in system filter */ |
| 5925 | f.system_filtering = TRUE; |
| 5926 | |
| 5927 | /* Any error in the filter file causes a delivery to be abandoned. */ |
| 5928 | |
| 5929 | redirect.string = system_filter; |
| 5930 | redirect.isfile = TRUE; |
| 5931 | redirect.check_owner = redirect.check_group = FALSE; |
| 5932 | redirect.owners = NULL; |
| 5933 | redirect.owngroups = NULL; |
| 5934 | redirect.pw = NULL; |
| 5935 | redirect.modemask = 0; |
| 5936 | |
| 5937 | DEBUG(D_deliver|D_filter) debug_printf("running system filter\n"); |
| 5938 | |
| 5939 | rc = rda_interpret( |
| 5940 | &redirect, /* Where the data is */ |
| 5941 | RDO_DEFER | /* Turn on all the enabling options */ |
| 5942 | RDO_FAIL | /* Leave off all the disabling options */ |
| 5943 | RDO_FILTER | |
| 5944 | RDO_FREEZE | |
| 5945 | RDO_REALLOG | |
| 5946 | RDO_REWRITE, |
| 5947 | NULL, /* No :include: restriction (not used in filter) */ |
| 5948 | NULL, /* No sieve vacation directory (not sieve!) */ |
| 5949 | NULL, /* No sieve enotify mailto owner (not sieve!) */ |
| 5950 | NULL, /* No sieve user address (not sieve!) */ |
| 5951 | NULL, /* No sieve subaddress (not sieve!) */ |
| 5952 | &ugid, /* uid/gid data */ |
| 5953 | &addr_new, /* Where to hang generated addresses */ |
| 5954 | &filter_message, /* Where to put error message */ |
| 5955 | NULL, /* Don't skip syntax errors */ |
| 5956 | &filtertype, /* Will always be set to FILTER_EXIM for this call */ |
| 5957 | US"system filter"); /* For error messages */ |
| 5958 | |
| 5959 | DEBUG(D_deliver|D_filter) debug_printf("system filter returned %d\n", rc); |
| 5960 | |
| 5961 | if (rc == FF_ERROR || rc == FF_NONEXIST) |
| 5962 | { |
| 5963 | (void)close(deliver_datafile); |
| 5964 | deliver_datafile = -1; |
| 5965 | log_write(0, LOG_MAIN|LOG_PANIC, "Error in system filter: %s", |
| 5966 | string_printing(filter_message)); |
| 5967 | return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */ |
| 5968 | } |
| 5969 | |
| 5970 | /* Reset things. If the filter message is an empty string, which can happen |
| 5971 | for a filter "fail" or "freeze" command with no text, reset it to NULL. */ |
| 5972 | |
| 5973 | f.system_filtering = FALSE; |
| 5974 | f.enable_dollar_recipients = FALSE; |
| 5975 | if (filter_message && filter_message[0] == 0) filter_message = NULL; |
| 5976 | |
| 5977 | /* Save the values of the system filter variables so that user filters |
| 5978 | can use them. */ |
| 5979 | |
| 5980 | memcpy(filter_sn, filter_n, sizeof(filter_sn)); |
| 5981 | |
| 5982 | /* The filter can request that delivery of the original addresses be |
| 5983 | deferred. */ |
| 5984 | |
| 5985 | if (rc == FF_DEFER) |
| 5986 | { |
| 5987 | process_recipients = RECIP_DEFER; |
| 5988 | deliver_msglog("Delivery deferred by system filter\n"); |
| 5989 | log_write(0, LOG_MAIN, "Delivery deferred by system filter"); |
| 5990 | } |
| 5991 | |
| 5992 | /* The filter can request that a message be frozen, but this does not |
| 5993 | take place if the message has been manually thawed. In that case, we must |
| 5994 | unset "delivered", which is forced by the "freeze" command to make -bF |
| 5995 | work properly. */ |
| 5996 | |
| 5997 | else if (rc == FF_FREEZE && !f.deliver_manual_thaw) |
| 5998 | { |
| 5999 | f.deliver_freeze = TRUE; |
| 6000 | deliver_frozen_at = time(NULL); |
| 6001 | process_recipients = RECIP_DEFER; |
| 6002 | frozen_info = string_sprintf(" by the system filter%s%s", |
| 6003 | filter_message ? US": " : US"", |
| 6004 | filter_message ? filter_message : US""); |
| 6005 | } |
| 6006 | |
| 6007 | /* The filter can request that a message be failed. The error message may be |
| 6008 | quite long - it is sent back to the sender in the bounce - but we don't want |
| 6009 | to fill up the log with repetitions of it. If it starts with << then the text |
| 6010 | between << and >> is written to the log, with the rest left for the bounce |
| 6011 | message. */ |
| 6012 | |
| 6013 | else if (rc == FF_FAIL) |
| 6014 | { |
| 6015 | uschar *colon = US""; |
| 6016 | uschar *logmsg = US""; |
| 6017 | int loglen = 0; |
| 6018 | |
| 6019 | process_recipients = RECIP_FAIL_FILTER; |
| 6020 | |
| 6021 | if (filter_message) |
| 6022 | { |
| 6023 | uschar *logend; |
| 6024 | colon = US": "; |
| 6025 | if ( filter_message[0] == '<' |
| 6026 | && filter_message[1] == '<' |
| 6027 | && (logend = Ustrstr(filter_message, ">>")) |
| 6028 | ) |
| 6029 | { |
| 6030 | logmsg = filter_message + 2; |
| 6031 | loglen = logend - logmsg; |
| 6032 | filter_message = logend + 2; |
| 6033 | if (filter_message[0] == 0) filter_message = NULL; |
| 6034 | } |
| 6035 | else |
| 6036 | { |
| 6037 | logmsg = filter_message; |
| 6038 | loglen = Ustrlen(filter_message); |
| 6039 | } |
| 6040 | } |
| 6041 | |
| 6042 | log_write(0, LOG_MAIN, "cancelled by system filter%s%.*s", colon, loglen, |
| 6043 | logmsg); |
| 6044 | } |
| 6045 | |
| 6046 | /* Delivery can be restricted only to those recipients (if any) that the |
| 6047 | filter specified. */ |
| 6048 | |
| 6049 | else if (rc == FF_DELIVERED) |
| 6050 | { |
| 6051 | process_recipients = RECIP_IGNORE; |
| 6052 | if (addr_new) |
| 6053 | log_write(0, LOG_MAIN, "original recipients ignored (system filter)"); |
| 6054 | else |
| 6055 | log_write(0, LOG_MAIN, "=> discarded (system filter)"); |
| 6056 | } |
| 6057 | |
| 6058 | /* If any new addresses were created by the filter, fake up a "parent" |
| 6059 | for them. This is necessary for pipes, etc., which are expected to have |
| 6060 | parents, and it also gives some sensible logging for others. Allow |
| 6061 | pipes, files, and autoreplies, and run them as the filter uid if set, |
| 6062 | otherwise as the current uid. */ |
| 6063 | |
| 6064 | if (addr_new) |
| 6065 | { |
| 6066 | int uid = system_filter_uid_set ? system_filter_uid : geteuid(); |
| 6067 | int gid = system_filter_gid_set ? system_filter_gid : getegid(); |
| 6068 | |
| 6069 | /* The text "system-filter" is tested in transport_set_up_command() and in |
| 6070 | set_up_shell_command() in the pipe transport, to enable them to permit |
| 6071 | $recipients, so don't change it here without also changing it there. */ |
| 6072 | |
| 6073 | address_item *p = addr_new; |
| 6074 | address_item *parent = deliver_make_addr(US"system-filter", FALSE); |
| 6075 | |
| 6076 | parent->domain = string_copylc(qualify_domain_recipient); |
| 6077 | parent->local_part = US"system-filter"; |
| 6078 | |
| 6079 | /* As part of this loop, we arrange for addr_last to end up pointing |
| 6080 | at the final address. This is used if we go on to add addresses for the |
| 6081 | original recipients. */ |
| 6082 | |
| 6083 | while (p) |
| 6084 | { |
| 6085 | if (parent->child_count == USHRT_MAX) |
| 6086 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "system filter generated more " |
| 6087 | "than %d delivery addresses", USHRT_MAX); |
| 6088 | parent->child_count++; |
| 6089 | p->parent = parent; |
| 6090 | |
| 6091 | if (testflag(p, af_pfr)) |
| 6092 | { |
| 6093 | uschar *tpname; |
| 6094 | uschar *type; |
| 6095 | p->uid = uid; |
| 6096 | p->gid = gid; |
| 6097 | setflag(p, af_uid_set); |
| 6098 | setflag(p, af_gid_set); |
| 6099 | setflag(p, af_allow_file); |
| 6100 | setflag(p, af_allow_pipe); |
| 6101 | setflag(p, af_allow_reply); |
| 6102 | |
| 6103 | /* Find the name of the system filter's appropriate pfr transport */ |
| 6104 | |
| 6105 | if (p->address[0] == '|') |
| 6106 | { |
| 6107 | type = US"pipe"; |
| 6108 | tpname = system_filter_pipe_transport; |
| 6109 | address_pipe = p->address; |
| 6110 | } |
| 6111 | else if (p->address[0] == '>') |
| 6112 | { |
| 6113 | type = US"reply"; |
| 6114 | tpname = system_filter_reply_transport; |
| 6115 | } |
| 6116 | else |
| 6117 | { |
| 6118 | if (p->address[Ustrlen(p->address)-1] == '/') |
| 6119 | { |
| 6120 | type = US"directory"; |
| 6121 | tpname = system_filter_directory_transport; |
| 6122 | } |
| 6123 | else |
| 6124 | { |
| 6125 | type = US"file"; |
| 6126 | tpname = system_filter_file_transport; |
| 6127 | } |
| 6128 | address_file = p->address; |
| 6129 | } |
| 6130 | |
| 6131 | /* Now find the actual transport, first expanding the name. We have |
| 6132 | set address_file or address_pipe above. */ |
| 6133 | |
| 6134 | if (tpname) |
| 6135 | { |
| 6136 | uschar *tmp = expand_string(tpname); |
| 6137 | address_file = address_pipe = NULL; |
| 6138 | if (!tmp) |
| 6139 | p->message = string_sprintf("failed to expand \"%s\" as a " |
| 6140 | "system filter transport name", tpname); |
| 6141 | if (is_tainted(tmp)) |
| 6142 | p->message = string_sprintf("attempt to used tainted value '%s' for" |
| 6143 | "transport '%s' as a system filter", tmp, tpname); |
| 6144 | tpname = tmp; |
| 6145 | } |
| 6146 | else |
| 6147 | p->message = string_sprintf("system_filter_%s_transport is unset", |
| 6148 | type); |
| 6149 | |
| 6150 | if (tpname) |
| 6151 | { |
| 6152 | transport_instance *tp; |
| 6153 | for (tp = transports; tp; tp = tp->next) |
| 6154 | if (Ustrcmp(tp->name, tpname) == 0) |
| 6155 | { |
| 6156 | p->transport = tp; |
| 6157 | break; |
| 6158 | } |
| 6159 | if (!tp) |
| 6160 | p->message = string_sprintf("failed to find \"%s\" transport " |
| 6161 | "for system filter delivery", tpname); |
| 6162 | } |
| 6163 | |
| 6164 | /* If we couldn't set up a transport, defer the delivery, putting the |
| 6165 | error on the panic log as well as the main log. */ |
| 6166 | |
| 6167 | if (!p->transport) |
| 6168 | { |
| 6169 | address_item *badp = p; |
| 6170 | p = p->next; |
| 6171 | if (!addr_last) addr_new = p; else addr_last->next = p; |
| 6172 | badp->local_part = badp->address; /* Needed for log line */ |
| 6173 | post_process_one(badp, DEFER, LOG_MAIN|LOG_PANIC, EXIM_DTYPE_ROUTER, 0); |
| 6174 | continue; |
| 6175 | } |
| 6176 | } /* End of pfr handling */ |
| 6177 | |
| 6178 | /* Either a non-pfr delivery, or we found a transport */ |
| 6179 | |
| 6180 | DEBUG(D_deliver|D_filter) |
| 6181 | debug_printf("system filter added %s\n", p->address); |
| 6182 | |
| 6183 | addr_last = p; |
| 6184 | p = p->next; |
| 6185 | } /* Loop through all addr_new addresses */ |
| 6186 | } |
| 6187 | } |
| 6188 | |
| 6189 | |
| 6190 | /* Scan the recipients list, and for every one that is not in the non- |
| 6191 | recipients tree, add an addr item to the chain of new addresses. If the pno |
| 6192 | value is non-negative, we must set the onetime parent from it. This which |
| 6193 | points to the relevant entry in the recipients list. |
| 6194 | |
| 6195 | This processing can be altered by the setting of the process_recipients |
| 6196 | variable, which is changed if recipients are to be ignored, failed, or |
| 6197 | deferred. This can happen as a result of system filter activity, or if the -Mg |
| 6198 | option is used to fail all of them. |
| 6199 | |
| 6200 | Duplicate addresses are handled later by a different tree structure; we can't |
| 6201 | just extend the non-recipients tree, because that will be re-written to the |
| 6202 | spool if the message is deferred, and in any case there are casing |
| 6203 | complications for local addresses. */ |
| 6204 | |
| 6205 | if (process_recipients != RECIP_IGNORE) |
| 6206 | for (i = 0; i < recipients_count; i++) |
| 6207 | if (!tree_search(tree_nonrecipients, recipients_list[i].address)) |
| 6208 | { |
| 6209 | recipient_item *r = recipients_list + i; |
| 6210 | address_item *new = deliver_make_addr(r->address, FALSE); |
| 6211 | new->prop.errors_address = r->errors_to; |
| 6212 | #ifdef SUPPORT_I18N |
| 6213 | if ((new->prop.utf8_msg = message_smtputf8)) |
| 6214 | { |
| 6215 | new->prop.utf8_downcvt = message_utf8_downconvert == 1; |
| 6216 | new->prop.utf8_downcvt_maybe = message_utf8_downconvert == -1; |
| 6217 | DEBUG(D_deliver) debug_printf("utf8, downconvert %s\n", |
| 6218 | new->prop.utf8_downcvt ? "yes" |
| 6219 | : new->prop.utf8_downcvt_maybe ? "ifneeded" |
| 6220 | : "no"); |
| 6221 | } |
| 6222 | #endif |
| 6223 | |
| 6224 | if (r->pno >= 0) |
| 6225 | new->onetime_parent = recipients_list[r->pno].address; |
| 6226 | |
| 6227 | /* If DSN support is enabled, set the dsn flags and the original receipt |
| 6228 | to be passed on to other DSN enabled MTAs */ |
| 6229 | |
| 6230 | new->dsn_flags = r->dsn_flags & rf_dsnflags; |
| 6231 | new->dsn_orcpt = r->orcpt; |
| 6232 | DEBUG(D_deliver) debug_printf("DSN: set orcpt: %s flags: 0x%x\n", |
| 6233 | new->dsn_orcpt ? new->dsn_orcpt : US"", new->dsn_flags); |
| 6234 | |
| 6235 | switch (process_recipients) |
| 6236 | { |
| 6237 | /* RECIP_DEFER is set when a system filter freezes a message. */ |
| 6238 | |
| 6239 | case RECIP_DEFER: |
| 6240 | new->next = addr_defer; |
| 6241 | addr_defer = new; |
| 6242 | break; |
| 6243 | |
| 6244 | |
| 6245 | /* RECIP_FAIL_FILTER is set when a system filter has obeyed a "fail" |
| 6246 | command. */ |
| 6247 | |
| 6248 | case RECIP_FAIL_FILTER: |
| 6249 | new->message = |
| 6250 | filter_message ? filter_message : US"delivery cancelled"; |
| 6251 | setflag(new, af_pass_message); |
| 6252 | goto RECIP_QUEUE_FAILED; /* below */ |
| 6253 | |
| 6254 | |
| 6255 | /* RECIP_FAIL_TIMEOUT is set when a message is frozen, but is older |
| 6256 | than the value in timeout_frozen_after. Treat non-bounce messages |
| 6257 | similarly to -Mg; for bounce messages we just want to discard, so |
| 6258 | don't put the address on the failed list. The timeout has already |
| 6259 | been logged. */ |
| 6260 | |
| 6261 | case RECIP_FAIL_TIMEOUT: |
| 6262 | new->message = US"delivery cancelled; message timed out"; |
| 6263 | goto RECIP_QUEUE_FAILED; /* below */ |
| 6264 | |
| 6265 | |
| 6266 | /* RECIP_FAIL is set when -Mg has been used. */ |
| 6267 | |
| 6268 | case RECIP_FAIL: |
| 6269 | new->message = US"delivery cancelled by administrator"; |
| 6270 | /* Fall through */ |
| 6271 | |
| 6272 | /* Common code for the failure cases above. If this is not a bounce |
| 6273 | message, put the address on the failed list so that it is used to |
| 6274 | create a bounce. Otherwise do nothing - this just discards the address. |
| 6275 | The incident has already been logged. */ |
| 6276 | |
| 6277 | RECIP_QUEUE_FAILED: |
| 6278 | if (sender_address[0]) |
| 6279 | { |
| 6280 | new->next = addr_failed; |
| 6281 | addr_failed = new; |
| 6282 | } |
| 6283 | break; |
| 6284 | |
| 6285 | |
| 6286 | /* RECIP_FAIL_LOOP is set when there are too many Received: headers |
| 6287 | in the message. Process each address as a routing failure; if this |
| 6288 | is a bounce message, it will get frozen. */ |
| 6289 | |
| 6290 | case RECIP_FAIL_LOOP: |
| 6291 | new->message = US"Too many \"Received\" headers - suspected mail loop"; |
| 6292 | post_process_one(new, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0); |
| 6293 | break; |
| 6294 | |
| 6295 | |
| 6296 | /* Value should be RECIP_ACCEPT; take this as the safe default. */ |
| 6297 | |
| 6298 | default: |
| 6299 | if (!addr_new) addr_new = new; else addr_last->next = new; |
| 6300 | addr_last = new; |
| 6301 | break; |
| 6302 | } |
| 6303 | |
| 6304 | #ifndef DISABLE_EVENT |
| 6305 | if (process_recipients != RECIP_ACCEPT && event_action) |
| 6306 | { |
| 6307 | uschar * save_local = deliver_localpart; |
| 6308 | const uschar * save_domain = deliver_domain; |
| 6309 | uschar * addr = new->address, * errmsg = NULL; |
| 6310 | int start, end, dom; |
| 6311 | |
| 6312 | if (!parse_extract_address(addr, &errmsg, &start, &end, &dom, TRUE)) |
| 6313 | log_write(0, LOG_MAIN|LOG_PANIC, |
| 6314 | "failed to parse address '%.100s': %s\n", addr, errmsg); |
| 6315 | else |
| 6316 | { |
| 6317 | deliver_localpart = |
| 6318 | string_copyn(addr+start, dom ? (dom-1) - start : end - start); |
| 6319 | deliver_domain = dom ? CUS string_copyn(addr+dom, end - dom) : CUS""; |
| 6320 | |
| 6321 | event_raise(event_action, US"msg:fail:internal", new->message); |
| 6322 | |
| 6323 | deliver_localpart = save_local; |
| 6324 | deliver_domain = save_domain; |
| 6325 | } |
| 6326 | } |
| 6327 | #endif |
| 6328 | } |
| 6329 | |
| 6330 | DEBUG(D_deliver) |
| 6331 | { |
| 6332 | debug_printf("Delivery address list:\n"); |
| 6333 | for (address_item * p = addr_new; p; p = p->next) |
| 6334 | debug_printf(" %s %s\n", p->address, |
| 6335 | p->onetime_parent ? p->onetime_parent : US""); |
| 6336 | } |
| 6337 | |
| 6338 | /* Set up the buffers used for copying over the file when delivering. */ |
| 6339 | |
| 6340 | deliver_in_buffer = store_malloc(DELIVER_IN_BUFFER_SIZE); |
| 6341 | deliver_out_buffer = store_malloc(DELIVER_OUT_BUFFER_SIZE); |
| 6342 | |
| 6343 | |
| 6344 | |
| 6345 | /* Until there are no more new addresses, handle each one as follows: |
| 6346 | |
| 6347 | . If this is a generated address (indicated by the presence of a parent |
| 6348 | pointer) then check to see whether it is a pipe, file, or autoreply, and |
| 6349 | if so, handle it directly here. The router that produced the address will |
| 6350 | have set the allow flags into the address, and also set the uid/gid required. |
| 6351 | Having the routers generate new addresses and then checking them here at |
| 6352 | the outer level is tidier than making each router do the checking, and |
| 6353 | means that routers don't need access to the failed address queue. |
| 6354 | |
| 6355 | . Break up the address into local part and domain, and make lowercased |
| 6356 | versions of these strings. We also make unquoted versions of the local part. |
| 6357 | |
| 6358 | . Handle the percent hack for those domains for which it is valid. |
| 6359 | |
| 6360 | . For child addresses, determine if any of the parents have the same address. |
| 6361 | If so, generate a different string for previous delivery checking. Without |
| 6362 | this code, if the address spqr generates spqr via a forward or alias file, |
| 6363 | delivery of the generated spqr stops further attempts at the top level spqr, |
| 6364 | which is not what is wanted - it may have generated other addresses. |
| 6365 | |
| 6366 | . Check on the retry database to see if routing was previously deferred, but |
| 6367 | only if in a queue run. Addresses that are to be routed are put on the |
| 6368 | addr_route chain. Addresses that are to be deferred are put on the |
| 6369 | addr_defer chain. We do all the checking first, so as not to keep the |
| 6370 | retry database open any longer than necessary. |
| 6371 | |
| 6372 | . Now we run the addresses through the routers. A router may put the address |
| 6373 | on either the addr_local or the addr_remote chain for local or remote |
| 6374 | delivery, respectively, or put it on the addr_failed chain if it is |
| 6375 | undeliveable, or it may generate child addresses and put them on the |
| 6376 | addr_new chain, or it may defer an address. All the chain anchors are |
| 6377 | passed as arguments so that the routers can be called for verification |
| 6378 | purposes as well. |
| 6379 | |
| 6380 | . If new addresses have been generated by the routers, da capo. |
| 6381 | */ |
| 6382 | |
| 6383 | f.header_rewritten = FALSE; /* No headers rewritten yet */ |
| 6384 | while (addr_new) /* Loop until all addresses dealt with */ |
| 6385 | { |
| 6386 | address_item *addr, *parent; |
| 6387 | |
| 6388 | /* Failure to open the retry database is treated the same as if it does |
| 6389 | not exist. In both cases, dbm_file is NULL. */ |
| 6390 | |
| 6391 | if (!(dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE, TRUE))) |
| 6392 | DEBUG(D_deliver|D_retry|D_route|D_hints_lookup) |
| 6393 | debug_printf("no retry data available\n"); |
| 6394 | |
| 6395 | /* Scan the current batch of new addresses, to handle pipes, files and |
| 6396 | autoreplies, and determine which others are ready for routing. */ |
| 6397 | |
| 6398 | while (addr_new) |
| 6399 | { |
| 6400 | int rc; |
| 6401 | uschar *p; |
| 6402 | tree_node *tnode; |
| 6403 | dbdata_retry *domain_retry_record; |
| 6404 | dbdata_retry *address_retry_record; |
| 6405 | |
| 6406 | addr = addr_new; |
| 6407 | addr_new = addr->next; |
| 6408 | |
| 6409 | DEBUG(D_deliver|D_retry|D_route) |
| 6410 | { |
| 6411 | debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"); |
| 6412 | debug_printf("Considering: %s\n", addr->address); |
| 6413 | } |
| 6414 | |
| 6415 | /* Handle generated address that is a pipe or a file or an autoreply. */ |
| 6416 | |
| 6417 | if (testflag(addr, af_pfr)) |
| 6418 | { |
| 6419 | /* If an autoreply in a filter could not generate a syntactically valid |
| 6420 | address, give up forthwith. Set af_ignore_error so that we don't try to |
| 6421 | generate a bounce. */ |
| 6422 | |
| 6423 | if (testflag(addr, af_bad_reply)) |
| 6424 | { |
| 6425 | addr->basic_errno = ERRNO_BADADDRESS2; |
| 6426 | addr->local_part = addr->address; |
| 6427 | addr->message = |
| 6428 | US"filter autoreply generated syntactically invalid recipient"; |
| 6429 | addr->prop.ignore_error = TRUE; |
| 6430 | (void) post_process_one(addr, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0); |
| 6431 | continue; /* with the next new address */ |
| 6432 | } |
| 6433 | |
| 6434 | /* If two different users specify delivery to the same pipe or file or |
| 6435 | autoreply, there should be two different deliveries, so build a unique |
| 6436 | string that incorporates the original address, and use this for |
| 6437 | duplicate testing and recording delivery, and also for retrying. */ |
| 6438 | |
| 6439 | addr->unique = |
| 6440 | string_sprintf("%s:%s", addr->address, addr->parent->unique + |
| 6441 | (testflag(addr->parent, af_homonym)? 3:0)); |
| 6442 | |
| 6443 | addr->address_retry_key = addr->domain_retry_key = |
| 6444 | string_sprintf("T:%s", addr->unique); |
| 6445 | |
| 6446 | /* If a filter file specifies two deliveries to the same pipe or file, |
| 6447 | we want to de-duplicate, but this is probably not wanted for two mail |
| 6448 | commands to the same address, where probably both should be delivered. |
| 6449 | So, we have to invent a different unique string in that case. Just |
| 6450 | keep piling '>' characters on the front. */ |
| 6451 | |
| 6452 | if (addr->address[0] == '>') |
| 6453 | while (tree_search(tree_duplicates, addr->unique)) |
| 6454 | addr->unique = string_sprintf(">%s", addr->unique); |
| 6455 | |
| 6456 | else if ((tnode = tree_search(tree_duplicates, addr->unique))) |
| 6457 | { |
| 6458 | DEBUG(D_deliver|D_route) |
| 6459 | debug_printf("%s is a duplicate address: discarded\n", addr->address); |
| 6460 | addr->dupof = tnode->data.ptr; |
| 6461 | addr->next = addr_duplicate; |
| 6462 | addr_duplicate = addr; |
| 6463 | continue; |
| 6464 | } |
| 6465 | |
| 6466 | DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique); |
| 6467 | |
| 6468 | /* Check for previous delivery */ |
| 6469 | |
| 6470 | if (tree_search(tree_nonrecipients, addr->unique)) |
| 6471 | { |
| 6472 | DEBUG(D_deliver|D_route) |
| 6473 | debug_printf("%s was previously delivered: discarded\n", addr->address); |
| 6474 | child_done(addr, tod_stamp(tod_log)); |
| 6475 | continue; |
| 6476 | } |
| 6477 | |
| 6478 | /* Save for checking future duplicates */ |
| 6479 | |
| 6480 | tree_add_duplicate(addr->unique, addr); |
| 6481 | |
| 6482 | /* Set local part and domain */ |
| 6483 | |
| 6484 | addr->local_part = addr->address; |
| 6485 | addr->domain = addr->parent->domain; |
| 6486 | |
| 6487 | /* Ensure that the delivery is permitted. */ |
| 6488 | |
| 6489 | if (testflag(addr, af_file)) |
| 6490 | { |
| 6491 | if (!testflag(addr, af_allow_file)) |
| 6492 | { |
| 6493 | addr->basic_errno = ERRNO_FORBIDFILE; |
| 6494 | addr->message = US"delivery to file forbidden"; |
| 6495 | (void)post_process_one(addr, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0); |
| 6496 | continue; /* with the next new address */ |
| 6497 | } |
| 6498 | } |
| 6499 | else if (addr->address[0] == '|') |
| 6500 | { |
| 6501 | if (!testflag(addr, af_allow_pipe)) |
| 6502 | { |
| 6503 | addr->basic_errno = ERRNO_FORBIDPIPE; |
| 6504 | addr->message = US"delivery to pipe forbidden"; |
| 6505 | (void)post_process_one(addr, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0); |
| 6506 | continue; /* with the next new address */ |
| 6507 | } |
| 6508 | } |
| 6509 | else if (!testflag(addr, af_allow_reply)) |
| 6510 | { |
| 6511 | addr->basic_errno = ERRNO_FORBIDREPLY; |
| 6512 | addr->message = US"autoreply forbidden"; |
| 6513 | (void)post_process_one(addr, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0); |
| 6514 | continue; /* with the next new address */ |
| 6515 | } |
| 6516 | |
| 6517 | /* If the errno field is already set to BADTRANSPORT, it indicates |
| 6518 | failure to expand a transport string, or find the associated transport, |
| 6519 | or an unset transport when one is required. Leave this test till now so |
| 6520 | that the forbid errors are given in preference. */ |
| 6521 | |
| 6522 | if (addr->basic_errno == ERRNO_BADTRANSPORT) |
| 6523 | { |
| 6524 | (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0); |
| 6525 | continue; |
| 6526 | } |
| 6527 | |
| 6528 | /* Treat /dev/null as a special case and abandon the delivery. This |
| 6529 | avoids having to specify a uid on the transport just for this case. |
| 6530 | Arrange for the transport name to be logged as "**bypassed**". */ |
| 6531 | |
| 6532 | if (Ustrcmp(addr->address, "/dev/null") == 0) |
| 6533 | { |
| 6534 | uschar *save = addr->transport->name; |
| 6535 | addr->transport->name = US"**bypassed**"; |
| 6536 | (void)post_process_one(addr, OK, LOG_MAIN, EXIM_DTYPE_TRANSPORT, '='); |
| 6537 | addr->transport->name = save; |
| 6538 | continue; /* with the next new address */ |
| 6539 | } |
| 6540 | |
| 6541 | /* Pipe, file, or autoreply delivery is to go ahead as a normal local |
| 6542 | delivery. */ |
| 6543 | |
| 6544 | DEBUG(D_deliver|D_route) |
| 6545 | debug_printf("queued for %s transport\n", addr->transport->name); |
| 6546 | addr->next = addr_local; |
| 6547 | addr_local = addr; |
| 6548 | continue; /* with the next new address */ |
| 6549 | } |
| 6550 | |
| 6551 | /* Handle normal addresses. First, split up into local part and domain, |
| 6552 | handling the %-hack if necessary. There is the possibility of a defer from |
| 6553 | a lookup in percent_hack_domains. */ |
| 6554 | |
| 6555 | if ((rc = deliver_split_address(addr)) == DEFER) |
| 6556 | { |
| 6557 | addr->message = US"cannot check percent_hack_domains"; |
| 6558 | addr->basic_errno = ERRNO_LISTDEFER; |
| 6559 | (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_NONE, 0); |
| 6560 | continue; |
| 6561 | } |
| 6562 | |
| 6563 | /* Check to see if the domain is held. If so, proceed only if the |
| 6564 | delivery was forced by hand. */ |
| 6565 | |
| 6566 | deliver_domain = addr->domain; /* set $domain */ |
| 6567 | if ( !forced && hold_domains |
| 6568 | && (rc = match_isinlist(addr->domain, (const uschar **)&hold_domains, 0, |
| 6569 | &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, |
| 6570 | NULL)) != FAIL |
| 6571 | ) |
| 6572 | { |
| 6573 | if (rc == DEFER) |
| 6574 | { |
| 6575 | addr->message = US"hold_domains lookup deferred"; |
| 6576 | addr->basic_errno = ERRNO_LISTDEFER; |
| 6577 | } |
| 6578 | else |
| 6579 | { |
| 6580 | addr->message = US"domain is held"; |
| 6581 | addr->basic_errno = ERRNO_HELD; |
| 6582 | } |
| 6583 | (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_NONE, 0); |
| 6584 | continue; |
| 6585 | } |
| 6586 | |
| 6587 | /* Now we can check for duplicates and previously delivered addresses. In |
| 6588 | order to do this, we have to generate a "unique" value for each address, |
| 6589 | because there may be identical actual addresses in a line of descendents. |
| 6590 | The "unique" field is initialized to the same value as the "address" field, |
| 6591 | but gets changed here to cope with identically-named descendents. */ |
| 6592 | |
| 6593 | for (parent = addr->parent; parent; parent = parent->parent) |
| 6594 | if (strcmpic(addr->address, parent->address) == 0) break; |
| 6595 | |
| 6596 | /* If there's an ancestor with the same name, set the homonym flag. This |
| 6597 | influences how deliveries are recorded. Then add a prefix on the front of |
| 6598 | the unique address. We use \n\ where n starts at 0 and increases each time. |
| 6599 | It is unlikely to pass 9, but if it does, it may look odd but will still |
| 6600 | work. This means that siblings or cousins with the same names are treated |
| 6601 | as duplicates, which is what we want. */ |
| 6602 | |
| 6603 | if (parent) |
| 6604 | { |
| 6605 | setflag(addr, af_homonym); |
| 6606 | if (parent->unique[0] != '\\') |
| 6607 | addr->unique = string_sprintf("\\0\\%s", addr->address); |
| 6608 | else |
| 6609 | addr->unique = string_sprintf("\\%c\\%s", parent->unique[1] + 1, |
| 6610 | addr->address); |
| 6611 | } |
| 6612 | |
| 6613 | /* Ensure that the domain in the unique field is lower cased, because |
| 6614 | domains are always handled caselessly. */ |
| 6615 | |
| 6616 | p = Ustrrchr(addr->unique, '@'); |
| 6617 | while (*p != 0) { *p = tolower(*p); p++; } |
| 6618 | |
| 6619 | DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique); |
| 6620 | |
| 6621 | if (tree_search(tree_nonrecipients, addr->unique)) |
| 6622 | { |
| 6623 | DEBUG(D_deliver|D_route) |
| 6624 | debug_printf("%s was previously delivered: discarded\n", addr->unique); |
| 6625 | child_done(addr, tod_stamp(tod_log)); |
| 6626 | continue; |
| 6627 | } |
| 6628 | |
| 6629 | /* Get the routing retry status, saving the two retry keys (with and |
| 6630 | without the local part) for subsequent use. If there is no retry record for |
| 6631 | the standard address routing retry key, we look for the same key with the |
| 6632 | sender attached, because this form is used by the smtp transport after a |
| 6633 | 4xx response to RCPT when address_retry_include_sender is true. */ |
| 6634 | |
| 6635 | addr->domain_retry_key = string_sprintf("R:%s", addr->domain); |
| 6636 | addr->address_retry_key = string_sprintf("R:%s@%s", addr->local_part, |
| 6637 | addr->domain); |
| 6638 | |
| 6639 | if (dbm_file) |
| 6640 | { |
| 6641 | domain_retry_record = dbfn_read(dbm_file, addr->domain_retry_key); |
| 6642 | if ( domain_retry_record |
| 6643 | && now - domain_retry_record->time_stamp > retry_data_expire |
| 6644 | ) |
| 6645 | { |
| 6646 | DEBUG(D_deliver|D_retry) |
| 6647 | debug_printf("domain retry record present but expired\n"); |
| 6648 | domain_retry_record = NULL; /* Ignore if too old */ |
| 6649 | } |
| 6650 | |
| 6651 | address_retry_record = dbfn_read(dbm_file, addr->address_retry_key); |
| 6652 | if ( address_retry_record |
| 6653 | && now - address_retry_record->time_stamp > retry_data_expire |
| 6654 | ) |
| 6655 | { |
| 6656 | DEBUG(D_deliver|D_retry) |
| 6657 | debug_printf("address retry record present but expired\n"); |
| 6658 | address_retry_record = NULL; /* Ignore if too old */ |
| 6659 | } |
| 6660 | |
| 6661 | if (!address_retry_record) |
| 6662 | { |
| 6663 | uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key, |
| 6664 | sender_address); |
| 6665 | address_retry_record = dbfn_read(dbm_file, altkey); |
| 6666 | if ( address_retry_record |
| 6667 | && now - address_retry_record->time_stamp > retry_data_expire) |
| 6668 | { |
| 6669 | DEBUG(D_deliver|D_retry) |
| 6670 | debug_printf("address<sender> retry record present but expired\n"); |
| 6671 | address_retry_record = NULL; /* Ignore if too old */ |
| 6672 | } |
| 6673 | } |
| 6674 | } |
| 6675 | else |
| 6676 | domain_retry_record = address_retry_record = NULL; |
| 6677 | |
| 6678 | DEBUG(D_deliver|D_retry) |
| 6679 | { |
| 6680 | if (!domain_retry_record) |
| 6681 | debug_printf("no domain retry record\n"); |
| 6682 | else |
| 6683 | debug_printf("have domain retry record; next_try = now%+d\n", |
| 6684 | f.running_in_test_harness ? 0 : |
| 6685 | (int)(domain_retry_record->next_try - now)); |
| 6686 | |
| 6687 | if (!address_retry_record) |
| 6688 | debug_printf("no address retry record\n"); |
| 6689 | else |
| 6690 | debug_printf("have address retry record; next_try = now%+d\n", |
| 6691 | f.running_in_test_harness ? 0 : |
| 6692 | (int)(address_retry_record->next_try - now)); |
| 6693 | } |
| 6694 | |
| 6695 | /* If we are sending a message down an existing SMTP connection, we must |
| 6696 | assume that the message which created the connection managed to route |
| 6697 | an address to that connection. We do not want to run the risk of taking |
| 6698 | a long time over routing here, because if we do, the server at the other |
| 6699 | end of the connection may time it out. This is especially true for messages |
| 6700 | with lots of addresses. For this kind of delivery, queue_running is not |
| 6701 | set, so we would normally route all addresses. We take a pragmatic approach |
| 6702 | and defer routing any addresses that have any kind of domain retry record. |
| 6703 | That is, we don't even look at their retry times. It doesn't matter if this |
| 6704 | doesn't work occasionally. This is all just an optimization, after all. |
| 6705 | |
| 6706 | The reason for not doing the same for address retries is that they normally |
| 6707 | arise from 4xx responses, not DNS timeouts. */ |
| 6708 | |
| 6709 | if (continue_hostname && domain_retry_record) |
| 6710 | { |
| 6711 | addr->message = US"reusing SMTP connection skips previous routing defer"; |
| 6712 | addr->basic_errno = ERRNO_RRETRY; |
| 6713 | (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0); |
| 6714 | |
| 6715 | addr->message = domain_retry_record->text; |
| 6716 | setflag(addr, af_pass_message); |
| 6717 | } |
| 6718 | |
| 6719 | /* If we are in a queue run, defer routing unless there is no retry data or |
| 6720 | we've passed the next retry time, or this message is forced. In other |
| 6721 | words, ignore retry data when not in a queue run. |
| 6722 | |
| 6723 | However, if the domain retry time has expired, always allow the routing |
| 6724 | attempt. If it fails again, the address will be failed. This ensures that |
| 6725 | each address is routed at least once, even after long-term routing |
| 6726 | failures. |
| 6727 | |
| 6728 | If there is an address retry, check that too; just wait for the next |
| 6729 | retry time. This helps with the case when the temporary error on the |
| 6730 | address was really message-specific rather than address specific, since |
| 6731 | it allows other messages through. |
| 6732 | |
| 6733 | We also wait for the next retry time if this is a message sent down an |
| 6734 | existing SMTP connection (even though that will be forced). Otherwise there |
| 6735 | will be far too many attempts for an address that gets a 4xx error. In |
| 6736 | fact, after such an error, we should not get here because, the host should |
| 6737 | not be remembered as one this message needs. However, there was a bug that |
| 6738 | used to cause this to happen, so it is best to be on the safe side. |
| 6739 | |
| 6740 | Even if we haven't reached the retry time in the hints, there is one more |
| 6741 | check to do, which is for the ultimate address timeout. We only do this |
| 6742 | check if there is an address retry record and there is not a domain retry |
| 6743 | record; this implies that previous attempts to handle the address had the |
| 6744 | retry_use_local_parts option turned on. We use this as an approximation |
| 6745 | for the destination being like a local delivery, for example delivery over |
| 6746 | LMTP to an IMAP message store. In this situation users are liable to bump |
| 6747 | into their quota and thereby have intermittently successful deliveries, |
| 6748 | which keep the retry record fresh, which can lead to us perpetually |
| 6749 | deferring messages. */ |
| 6750 | |
| 6751 | else if ( ( f.queue_running && !f.deliver_force |
| 6752 | || continue_hostname |
| 6753 | ) |
| 6754 | && ( ( domain_retry_record |
| 6755 | && now < domain_retry_record->next_try |
| 6756 | && !domain_retry_record->expired |
| 6757 | ) |
| 6758 | || ( address_retry_record |
| 6759 | && now < address_retry_record->next_try |
| 6760 | ) ) |
| 6761 | && ( domain_retry_record |
| 6762 | || !address_retry_record |
| 6763 | || !retry_ultimate_address_timeout(addr->address_retry_key, |
| 6764 | addr->domain, address_retry_record, now) |
| 6765 | ) ) |
| 6766 | { |
| 6767 | addr->message = US"retry time not reached"; |
| 6768 | addr->basic_errno = ERRNO_RRETRY; |
| 6769 | (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0); |
| 6770 | |
| 6771 | /* For remote-retry errors (here and just above) that we've not yet |
| 6772 | hit the retry time, use the error recorded in the retry database |
| 6773 | as info in the warning message. This lets us send a message even |
| 6774 | when we're not failing on a fresh attempt. We assume that this |
| 6775 | info is not sensitive. */ |
| 6776 | |
| 6777 | addr->message = domain_retry_record |
| 6778 | ? domain_retry_record->text : address_retry_record->text; |
| 6779 | setflag(addr, af_pass_message); |
| 6780 | } |
| 6781 | |
| 6782 | /* The domain is OK for routing. Remember if retry data exists so it |
| 6783 | can be cleaned up after a successful delivery. */ |
| 6784 | |
| 6785 | else |
| 6786 | { |
| 6787 | if (domain_retry_record || address_retry_record) |
| 6788 | setflag(addr, af_dr_retry_exists); |
| 6789 | addr->next = addr_route; |
| 6790 | addr_route = addr; |
| 6791 | DEBUG(D_deliver|D_route) |
| 6792 | debug_printf("%s: queued for routing\n", addr->address); |
| 6793 | } |
| 6794 | } |
| 6795 | |
| 6796 | /* The database is closed while routing is actually happening. Requests to |
| 6797 | update it are put on a chain and all processed together at the end. */ |
| 6798 | |
| 6799 | if (dbm_file) dbfn_close(dbm_file); |
| 6800 | |
| 6801 | /* If queue_domains is set, we don't even want to try routing addresses in |
| 6802 | those domains. During queue runs, queue_domains is forced to be unset. |
| 6803 | Optimize by skipping this pass through the addresses if nothing is set. */ |
| 6804 | |
| 6805 | if (!f.deliver_force && queue_domains) |
| 6806 | { |
| 6807 | address_item *okaddr = NULL; |
| 6808 | while (addr_route) |
| 6809 | { |
| 6810 | address_item *addr = addr_route; |
| 6811 | addr_route = addr->next; |
| 6812 | |
| 6813 | deliver_domain = addr->domain; /* set $domain */ |
| 6814 | if ((rc = match_isinlist(addr->domain, (const uschar **)&queue_domains, 0, |
| 6815 | &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL)) |
| 6816 | != OK) |
| 6817 | if (rc == DEFER) |
| 6818 | { |
| 6819 | addr->basic_errno = ERRNO_LISTDEFER; |
| 6820 | addr->message = US"queue_domains lookup deferred"; |
| 6821 | (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0); |
| 6822 | } |
| 6823 | else |
| 6824 | { |
| 6825 | addr->next = okaddr; |
| 6826 | okaddr = addr; |
| 6827 | } |
| 6828 | else |
| 6829 | { |
| 6830 | addr->basic_errno = ERRNO_QUEUE_DOMAIN; |
| 6831 | addr->message = US"domain is in queue_domains"; |
| 6832 | (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0); |
| 6833 | } |
| 6834 | } |
| 6835 | |
| 6836 | addr_route = okaddr; |
| 6837 | } |
| 6838 | |
| 6839 | /* Now route those addresses that are not deferred. */ |
| 6840 | |
| 6841 | while (addr_route) |
| 6842 | { |
| 6843 | int rc; |
| 6844 | address_item *addr = addr_route; |
| 6845 | const uschar *old_domain = addr->domain; |
| 6846 | uschar *old_unique = addr->unique; |
| 6847 | addr_route = addr->next; |
| 6848 | addr->next = NULL; |
| 6849 | |
| 6850 | /* Just in case some router parameter refers to it. */ |
| 6851 | |
| 6852 | if (!(return_path = addr->prop.errors_address)) |
| 6853 | return_path = sender_address; |
| 6854 | |
| 6855 | /* If a router defers an address, add a retry item. Whether or not to |
| 6856 | use the local part in the key is a property of the router. */ |
| 6857 | |
| 6858 | if ((rc = route_address(addr, &addr_local, &addr_remote, &addr_new, |
| 6859 | &addr_succeed, v_none)) == DEFER) |
| 6860 | retry_add_item(addr, |
| 6861 | addr->router->retry_use_local_part |
| 6862 | ? string_sprintf("R:%s@%s", addr->local_part, addr->domain) |
| 6863 | : string_sprintf("R:%s", addr->domain), |
| 6864 | 0); |
| 6865 | |
| 6866 | /* Otherwise, if there is an existing retry record in the database, add |
| 6867 | retry items to delete both forms. We must also allow for the possibility |
| 6868 | of a routing retry that includes the sender address. Since the domain might |
| 6869 | have been rewritten (expanded to fully qualified) as a result of routing, |
| 6870 | ensure that the rewritten form is also deleted. */ |
| 6871 | |
| 6872 | else if (testflag(addr, af_dr_retry_exists)) |
| 6873 | { |
| 6874 | uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key, |
| 6875 | sender_address); |
| 6876 | retry_add_item(addr, altkey, rf_delete); |
| 6877 | retry_add_item(addr, addr->address_retry_key, rf_delete); |
| 6878 | retry_add_item(addr, addr->domain_retry_key, rf_delete); |
| 6879 | if (Ustrcmp(addr->domain, old_domain) != 0) |
| 6880 | retry_add_item(addr, string_sprintf("R:%s", old_domain), rf_delete); |
| 6881 | } |
| 6882 | |
| 6883 | /* DISCARD is given for :blackhole: and "seen finish". The event has been |
| 6884 | logged, but we need to ensure the address (and maybe parents) is marked |
| 6885 | done. */ |
| 6886 | |
| 6887 | if (rc == DISCARD) |
| 6888 | { |
| 6889 | address_done(addr, tod_stamp(tod_log)); |
| 6890 | continue; /* route next address */ |
| 6891 | } |
| 6892 | |
| 6893 | /* The address is finished with (failed or deferred). */ |
| 6894 | |
| 6895 | if (rc != OK) |
| 6896 | { |
| 6897 | (void)post_process_one(addr, rc, LOG_MAIN, EXIM_DTYPE_ROUTER, 0); |
| 6898 | continue; /* route next address */ |
| 6899 | } |
| 6900 | |
| 6901 | /* The address has been routed. If the router changed the domain, it will |
| 6902 | also have changed the unique address. We have to test whether this address |
| 6903 | has already been delivered, because it's the unique address that finally |
| 6904 | gets recorded. */ |
| 6905 | |
| 6906 | if ( addr->unique != old_unique |
| 6907 | && tree_search(tree_nonrecipients, addr->unique) != 0 |
| 6908 | ) |
| 6909 | { |
| 6910 | DEBUG(D_deliver|D_route) debug_printf("%s was previously delivered: " |
| 6911 | "discarded\n", addr->address); |
| 6912 | if (addr_remote == addr) addr_remote = addr->next; |
| 6913 | else if (addr_local == addr) addr_local = addr->next; |
| 6914 | } |
| 6915 | |
| 6916 | /* If the router has same_domain_copy_routing set, we are permitted to copy |
| 6917 | the routing for any other addresses with the same domain. This is an |
| 6918 | optimisation to save repeated DNS lookups for "standard" remote domain |
| 6919 | routing. The option is settable only on routers that generate host lists. |
| 6920 | We play it very safe, and do the optimization only if the address is routed |
| 6921 | to a remote transport, there are no header changes, and the domain was not |
| 6922 | modified by the router. */ |
| 6923 | |
| 6924 | if ( addr_remote == addr |
| 6925 | && addr->router->same_domain_copy_routing |
| 6926 | && !addr->prop.extra_headers |
| 6927 | && !addr->prop.remove_headers |
| 6928 | && old_domain == addr->domain |
| 6929 | ) |
| 6930 | { |
| 6931 | address_item **chain = &addr_route; |
| 6932 | while (*chain) |
| 6933 | { |
| 6934 | address_item *addr2 = *chain; |
| 6935 | if (Ustrcmp(addr2->domain, addr->domain) != 0) |
| 6936 | { |
| 6937 | chain = &(addr2->next); |
| 6938 | continue; |
| 6939 | } |
| 6940 | |
| 6941 | /* Found a suitable address; take it off the routing list and add it to |
| 6942 | the remote delivery list. */ |
| 6943 | |
| 6944 | *chain = addr2->next; |
| 6945 | addr2->next = addr_remote; |
| 6946 | addr_remote = addr2; |
| 6947 | |
| 6948 | /* Copy the routing data */ |
| 6949 | |
| 6950 | addr2->domain = addr->domain; |
| 6951 | addr2->router = addr->router; |
| 6952 | addr2->transport = addr->transport; |
| 6953 | addr2->host_list = addr->host_list; |
| 6954 | addr2->fallback_hosts = addr->fallback_hosts; |
| 6955 | addr2->prop.errors_address = addr->prop.errors_address; |
| 6956 | copyflag(addr2, addr, af_hide_child); |
| 6957 | copyflag(addr2, addr, af_local_host_removed); |
| 6958 | |
| 6959 | DEBUG(D_deliver|D_route) |
| 6960 | debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n" |
| 6961 | "routing %s\n" |
| 6962 | "Routing for %s copied from %s\n", |
| 6963 | addr2->address, addr2->address, addr->address); |
| 6964 | } |
| 6965 | } |
| 6966 | } /* Continue with routing the next address. */ |
| 6967 | } /* Loop to process any child addresses that the routers created, and |
| 6968 | any rerouted addresses that got put back on the new chain. */ |
| 6969 | |
| 6970 | |
| 6971 | /* Debugging: show the results of the routing */ |
| 6972 | |
| 6973 | DEBUG(D_deliver|D_retry|D_route) |
| 6974 | { |
| 6975 | debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"); |
| 6976 | debug_printf("After routing:\n Local deliveries:\n"); |
| 6977 | for (address_item * p = addr_local; p; p = p->next) |
| 6978 | debug_printf(" %s\n", p->address); |
| 6979 | |
| 6980 | debug_printf(" Remote deliveries:\n"); |
| 6981 | for (address_item * p = addr_remote; p; p = p->next) |
| 6982 | debug_printf(" %s\n", p->address); |
| 6983 | |
| 6984 | debug_printf(" Failed addresses:\n"); |
| 6985 | for (address_item * p = addr_failed; p; p = p->next) |
| 6986 | debug_printf(" %s\n", p->address); |
| 6987 | |
| 6988 | debug_printf(" Deferred addresses:\n"); |
| 6989 | for (address_item * p = addr_defer; p; p = p->next) |
| 6990 | debug_printf(" %s\n", p->address); |
| 6991 | } |
| 6992 | |
| 6993 | /* Free any resources that were cached during routing. */ |
| 6994 | |
| 6995 | search_tidyup(); |
| 6996 | route_tidyup(); |
| 6997 | |
| 6998 | /* These two variables are set only during routing, after check_local_user. |
| 6999 | Ensure they are not set in transports. */ |
| 7000 | |
| 7001 | local_user_gid = (gid_t)(-1); |
| 7002 | local_user_uid = (uid_t)(-1); |
| 7003 | |
| 7004 | /* Check for any duplicate addresses. This check is delayed until after |
| 7005 | routing, because the flexibility of the routing configuration means that |
| 7006 | identical addresses with different parentage may end up being redirected to |
| 7007 | different addresses. Checking for duplicates too early (as we previously used |
| 7008 | to) makes this kind of thing not work. */ |
| 7009 | |
| 7010 | do_duplicate_check(&addr_local); |
| 7011 | do_duplicate_check(&addr_remote); |
| 7012 | |
| 7013 | /* When acting as an MUA wrapper, we proceed only if all addresses route to a |
| 7014 | remote transport. The check that they all end up in one transaction happens in |
| 7015 | the do_remote_deliveries() function. */ |
| 7016 | |
| 7017 | if ( mua_wrapper |
| 7018 | && (addr_local || addr_failed || addr_defer) |
| 7019 | ) |
| 7020 | { |
| 7021 | address_item *addr; |
| 7022 | uschar *which, *colon, *msg; |
| 7023 | |
| 7024 | if (addr_local) |
| 7025 | { |
| 7026 | addr = addr_local; |
| 7027 | which = US"local"; |
| 7028 | } |
| 7029 | else if (addr_defer) |
| 7030 | { |
| 7031 | addr = addr_defer; |
| 7032 | which = US"deferred"; |
| 7033 | } |
| 7034 | else |
| 7035 | { |
| 7036 | addr = addr_failed; |
| 7037 | which = US"failed"; |
| 7038 | } |
| 7039 | |
| 7040 | while (addr->parent) addr = addr->parent; |
| 7041 | |
| 7042 | if (addr->message) |
| 7043 | { |
| 7044 | colon = US": "; |
| 7045 | msg = addr->message; |
| 7046 | } |
| 7047 | else colon = msg = US""; |
| 7048 | |
| 7049 | /* We don't need to log here for a forced failure as it will already |
| 7050 | have been logged. Defer will also have been logged, but as a defer, so we do |
| 7051 | need to do the failure logging. */ |
| 7052 | |
| 7053 | if (addr != addr_failed) |
| 7054 | log_write(0, LOG_MAIN, "** %s routing yielded a %s delivery", |
| 7055 | addr->address, which); |
| 7056 | |
| 7057 | /* Always write an error to the caller */ |
| 7058 | |
| 7059 | fprintf(stderr, "routing %s yielded a %s delivery%s%s\n", addr->address, |
| 7060 | which, colon, msg); |
| 7061 | |
| 7062 | final_yield = DELIVER_MUA_FAILED; |
| 7063 | addr_failed = addr_defer = NULL; /* So that we remove the message */ |
| 7064 | goto DELIVERY_TIDYUP; |
| 7065 | } |
| 7066 | |
| 7067 | |
| 7068 | /* If this is a run to continue deliveries to an external channel that is |
| 7069 | already set up, defer any local deliveries. */ |
| 7070 | |
| 7071 | if (continue_transport) |
| 7072 | { |
| 7073 | if (addr_defer) |
| 7074 | { |
| 7075 | address_item *addr = addr_defer; |
| 7076 | while (addr->next) addr = addr->next; |
| 7077 | addr->next = addr_local; |
| 7078 | } |
| 7079 | else |
| 7080 | addr_defer = addr_local; |
| 7081 | addr_local = NULL; |
| 7082 | } |
| 7083 | |
| 7084 | |
| 7085 | /* Because address rewriting can happen in the routers, we should not really do |
| 7086 | ANY deliveries until all addresses have been routed, so that all recipients of |
| 7087 | the message get the same headers. However, this is in practice not always |
| 7088 | possible, since sometimes remote addresses give DNS timeouts for days on end. |
| 7089 | The pragmatic approach is to deliver what we can now, saving any rewritten |
| 7090 | headers so that at least the next lot of recipients benefit from the rewriting |
| 7091 | that has already been done. |
| 7092 | |
| 7093 | If any headers have been rewritten during routing, update the spool file to |
| 7094 | remember them for all subsequent deliveries. This can be delayed till later if |
| 7095 | there is only address to be delivered - if it succeeds the spool write need not |
| 7096 | happen. */ |
| 7097 | |
| 7098 | if ( f.header_rewritten |
| 7099 | && ( addr_local && (addr_local->next || addr_remote) |
| 7100 | || addr_remote && addr_remote->next |
| 7101 | ) ) |
| 7102 | { |
| 7103 | /* Panic-dies on error */ |
| 7104 | (void)spool_write_header(message_id, SW_DELIVERING, NULL); |
| 7105 | f.header_rewritten = FALSE; |
| 7106 | } |
| 7107 | |
| 7108 | |
| 7109 | /* If there are any deliveries to do and we do not already have the journal |
| 7110 | file, create it. This is used to record successful deliveries as soon as |
| 7111 | possible after each delivery is known to be complete. A file opened with |
| 7112 | O_APPEND is used so that several processes can run simultaneously. |
| 7113 | |
| 7114 | The journal is just insurance against crashes. When the spool file is |
| 7115 | ultimately updated at the end of processing, the journal is deleted. If a |
| 7116 | journal is found to exist at the start of delivery, the addresses listed |
| 7117 | therein are added to the non-recipients. */ |
| 7118 | |
| 7119 | if (addr_local || addr_remote) |
| 7120 | { |
| 7121 | if (journal_fd < 0) |
| 7122 | { |
| 7123 | uschar * fname = spool_fname(US"input", message_subdir, id, US"-J"); |
| 7124 | |
| 7125 | if ((journal_fd = Uopen(fname, |
| 7126 | #ifdef O_CLOEXEC |
| 7127 | O_CLOEXEC | |
| 7128 | #endif |
| 7129 | O_WRONLY|O_APPEND|O_CREAT|O_EXCL, SPOOL_MODE)) < 0) |
| 7130 | { |
| 7131 | log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't open journal file %s: %s", |
| 7132 | fname, strerror(errno)); |
| 7133 | return DELIVER_NOT_ATTEMPTED; |
| 7134 | } |
| 7135 | |
| 7136 | /* Set the close-on-exec flag, make the file owned by Exim, and ensure |
| 7137 | that the mode is correct - the group setting doesn't always seem to get |
| 7138 | set automatically. */ |
| 7139 | |
| 7140 | if( exim_fchown(journal_fd, exim_uid, exim_gid, fname) |
| 7141 | || fchmod(journal_fd, SPOOL_MODE) |
| 7142 | #ifndef O_CLOEXEC |
| 7143 | || fcntl(journal_fd, F_SETFD, fcntl(journal_fd, F_GETFD) | FD_CLOEXEC) |
| 7144 | #endif |
| 7145 | ) |
| 7146 | { |
| 7147 | int ret = Uunlink(fname); |
| 7148 | log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't set perms on journal file %s: %s", |
| 7149 | fname, strerror(errno)); |
| 7150 | if(ret && errno != ENOENT) |
| 7151 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s", |
| 7152 | fname, strerror(errno)); |
| 7153 | return DELIVER_NOT_ATTEMPTED; |
| 7154 | } |
| 7155 | } |
| 7156 | } |
| 7157 | else if (journal_fd >= 0) |
| 7158 | { |
| 7159 | close(journal_fd); |
| 7160 | journal_fd = -1; |
| 7161 | } |
| 7162 | |
| 7163 | |
| 7164 | |
| 7165 | /* Now we can get down to the business of actually doing deliveries. Local |
| 7166 | deliveries are done first, then remote ones. If ever the problems of how to |
| 7167 | handle fallback transports are figured out, this section can be put into a loop |
| 7168 | for handling fallbacks, though the uid switching will have to be revised. */ |
| 7169 | |
| 7170 | /* Precompile a regex that is used to recognize a parameter in response |
| 7171 | to an LHLO command, if is isn't already compiled. This may be used on both |
| 7172 | local and remote LMTP deliveries. */ |
| 7173 | |
| 7174 | if (!regex_IGNOREQUOTA) |
| 7175 | regex_IGNOREQUOTA = |
| 7176 | regex_must_compile(US"\\n250[\\s\\-]IGNOREQUOTA(\\s|\\n|$)", FALSE, TRUE); |
| 7177 | |
| 7178 | /* Handle local deliveries */ |
| 7179 | |
| 7180 | if (addr_local) |
| 7181 | { |
| 7182 | DEBUG(D_deliver|D_transport) |
| 7183 | debug_printf(">>>>>>>>>>>>>>>> Local deliveries >>>>>>>>>>>>>>>>\n"); |
| 7184 | do_local_deliveries(); |
| 7185 | f.disable_logging = FALSE; |
| 7186 | } |
| 7187 | |
| 7188 | /* If queue_run_local is set, we do not want to attempt any remote deliveries, |
| 7189 | so just queue them all. */ |
| 7190 | |
| 7191 | if (f.queue_run_local) |
| 7192 | while (addr_remote) |
| 7193 | { |
| 7194 | address_item *addr = addr_remote; |
| 7195 | addr_remote = addr->next; |
| 7196 | addr->next = NULL; |
| 7197 | addr->basic_errno = ERRNO_LOCAL_ONLY; |
| 7198 | addr->message = US"remote deliveries suppressed"; |
| 7199 | (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_TRANSPORT, 0); |
| 7200 | } |
| 7201 | |
| 7202 | /* Handle remote deliveries */ |
| 7203 | |
| 7204 | if (addr_remote) |
| 7205 | { |
| 7206 | DEBUG(D_deliver|D_transport) |
| 7207 | debug_printf(">>>>>>>>>>>>>>>> Remote deliveries >>>>>>>>>>>>>>>>\n"); |
| 7208 | |
| 7209 | /* Precompile some regex that are used to recognize parameters in response |
| 7210 | to an EHLO command, if they aren't already compiled. */ |
| 7211 | |
| 7212 | smtp_deliver_init(); |
| 7213 | |
| 7214 | /* Now sort the addresses if required, and do the deliveries. The yield of |
| 7215 | do_remote_deliveries is FALSE when mua_wrapper is set and all addresses |
| 7216 | cannot be delivered in one transaction. */ |
| 7217 | |
| 7218 | if (remote_sort_domains) sort_remote_deliveries(); |
| 7219 | if (!do_remote_deliveries(FALSE)) |
| 7220 | { |
| 7221 | log_write(0, LOG_MAIN, "** mua_wrapper is set but recipients cannot all " |
| 7222 | "be delivered in one transaction"); |
| 7223 | fprintf(stderr, "delivery to smarthost failed (configuration problem)\n"); |
| 7224 | |
| 7225 | final_yield = DELIVER_MUA_FAILED; |
| 7226 | addr_failed = addr_defer = NULL; /* So that we remove the message */ |
| 7227 | goto DELIVERY_TIDYUP; |
| 7228 | } |
| 7229 | |
| 7230 | /* See if any of the addresses that failed got put on the queue for delivery |
| 7231 | to their fallback hosts. We do it this way because often the same fallback |
| 7232 | host is used for many domains, so all can be sent in a single transaction |
| 7233 | (if appropriately configured). */ |
| 7234 | |
| 7235 | if (addr_fallback && !mua_wrapper) |
| 7236 | { |
| 7237 | DEBUG(D_deliver) debug_printf("Delivering to fallback hosts\n"); |
| 7238 | addr_remote = addr_fallback; |
| 7239 | addr_fallback = NULL; |
| 7240 | if (remote_sort_domains) sort_remote_deliveries(); |
| 7241 | do_remote_deliveries(TRUE); |
| 7242 | } |
| 7243 | f.disable_logging = FALSE; |
| 7244 | } |
| 7245 | |
| 7246 | |
| 7247 | /* All deliveries are now complete. Ignore SIGTERM during this tidying up |
| 7248 | phase, to minimize cases of half-done things. */ |
| 7249 | |
| 7250 | DEBUG(D_deliver) |
| 7251 | debug_printf(">>>>>>>>>>>>>>>> deliveries are done >>>>>>>>>>>>>>>>\n"); |
| 7252 | cancel_cutthrough_connection(TRUE, US"deliveries are done"); |
| 7253 | |
| 7254 | /* Root privilege is no longer needed */ |
| 7255 | |
| 7256 | exim_setugid(exim_uid, exim_gid, FALSE, US"post-delivery tidying"); |
| 7257 | |
| 7258 | set_process_info("tidying up after delivering %s", message_id); |
| 7259 | signal(SIGTERM, SIG_IGN); |
| 7260 | |
| 7261 | /* When we are acting as an MUA wrapper, the smtp transport will either have |
| 7262 | succeeded for all addresses, or failed them all in normal cases. However, there |
| 7263 | are some setup situations (e.g. when a named port does not exist) that cause an |
| 7264 | immediate exit with deferral of all addresses. Convert those into failures. We |
| 7265 | do not ever want to retry, nor do we want to send a bounce message. */ |
| 7266 | |
| 7267 | if (mua_wrapper) |
| 7268 | { |
| 7269 | if (addr_defer) |
| 7270 | { |
| 7271 | address_item * nextaddr; |
| 7272 | for (address_item * addr = addr_defer; addr; addr = nextaddr) |
| 7273 | { |
| 7274 | log_write(0, LOG_MAIN, "** %s mua_wrapper forced failure for deferred " |
| 7275 | "delivery", addr->address); |
| 7276 | nextaddr = addr->next; |
| 7277 | addr->next = addr_failed; |
| 7278 | addr_failed = addr; |
| 7279 | } |
| 7280 | addr_defer = NULL; |
| 7281 | } |
| 7282 | |
| 7283 | /* Now all should either have succeeded or failed. */ |
| 7284 | |
| 7285 | if (!addr_failed) |
| 7286 | final_yield = DELIVER_MUA_SUCCEEDED; |
| 7287 | else |
| 7288 | { |
| 7289 | host_item * host; |
| 7290 | uschar *s = addr_failed->user_message; |
| 7291 | |
| 7292 | if (!s) s = addr_failed->message; |
| 7293 | |
| 7294 | fprintf(stderr, "Delivery failed: "); |
| 7295 | if (addr_failed->basic_errno > 0) |
| 7296 | { |
| 7297 | fprintf(stderr, "%s", strerror(addr_failed->basic_errno)); |
| 7298 | if (s) fprintf(stderr, ": "); |
| 7299 | } |
| 7300 | if ((host = addr_failed->host_used)) |
| 7301 | fprintf(stderr, "H=%s [%s]: ", host->name, host->address); |
| 7302 | if (s) |
| 7303 | fprintf(stderr, "%s", CS s); |
| 7304 | else if (addr_failed->basic_errno <= 0) |
| 7305 | fprintf(stderr, "unknown error"); |
| 7306 | fprintf(stderr, "\n"); |
| 7307 | |
| 7308 | final_yield = DELIVER_MUA_FAILED; |
| 7309 | addr_failed = NULL; |
| 7310 | } |
| 7311 | } |
| 7312 | |
| 7313 | /* In a normal configuration, we now update the retry database. This is done in |
| 7314 | one fell swoop at the end in order not to keep opening and closing (and |
| 7315 | locking) the database. The code for handling retries is hived off into a |
| 7316 | separate module for convenience. We pass it the addresses of the various |
| 7317 | chains, because deferred addresses can get moved onto the failed chain if the |
| 7318 | retry cutoff time has expired for all alternative destinations. Bypass the |
| 7319 | updating of the database if the -N flag is set, which is a debugging thing that |
| 7320 | prevents actual delivery. */ |
| 7321 | |
| 7322 | else if (!f.dont_deliver) |
| 7323 | retry_update(&addr_defer, &addr_failed, &addr_succeed); |
| 7324 | |
| 7325 | /* Send DSN for successful messages if requested */ |
| 7326 | addr_senddsn = NULL; |
| 7327 | |
| 7328 | for (address_item * a = addr_succeed; a; a = a->next) |
| 7329 | { |
| 7330 | /* af_ignore_error not honored here. it's not an error */ |
| 7331 | DEBUG(D_deliver) debug_printf("DSN: processing router : %s\n" |
| 7332 | "DSN: processing successful delivery address: %s\n" |
| 7333 | "DSN: Sender_address: %s\n" |
| 7334 | "DSN: orcpt: %s flags: 0x%x\n" |
| 7335 | "DSN: envid: %s ret: %d\n" |
| 7336 | "DSN: Final recipient: %s\n" |
| 7337 | "DSN: Remote SMTP server supports DSN: %d\n", |
| 7338 | a->router ? a->router->name : US"(unknown)", |
| 7339 | a->address, |
| 7340 | sender_address, |
| 7341 | a->dsn_orcpt ? a->dsn_orcpt : US"NULL", |
| 7342 | a->dsn_flags, |
| 7343 | dsn_envid ? dsn_envid : US"NULL", dsn_ret, |
| 7344 | a->address, |
| 7345 | a->dsn_aware |
| 7346 | ); |
| 7347 | |
| 7348 | /* send report if next hop not DSN aware or a router flagged "last DSN hop" |
| 7349 | and a report was requested */ |
| 7350 | |
| 7351 | if ( (a->dsn_aware != dsn_support_yes || a->dsn_flags & rf_dsnlasthop) |
| 7352 | && a->dsn_flags & rf_notify_success |
| 7353 | ) |
| 7354 | { |
| 7355 | /* copy and relink address_item and send report with all of them at once later */ |
| 7356 | address_item * addr_next = addr_senddsn; |
| 7357 | addr_senddsn = store_get(sizeof(address_item), FALSE); |
| 7358 | *addr_senddsn = *a; |
| 7359 | addr_senddsn->next = addr_next; |
| 7360 | } |
| 7361 | else |
| 7362 | DEBUG(D_deliver) debug_printf("DSN: not sending DSN success message\n"); |
| 7363 | } |
| 7364 | |
| 7365 | if (addr_senddsn) |
| 7366 | { |
| 7367 | pid_t pid; |
| 7368 | int fd; |
| 7369 | |
| 7370 | /* create exim process to send message */ |
| 7371 | pid = child_open_exim(&fd, US"DSN"); |
| 7372 | |
| 7373 | DEBUG(D_deliver) debug_printf("DSN: child_open_exim returns: %d\n", pid); |
| 7374 | |
| 7375 | if (pid < 0) /* Creation of child failed */ |
| 7376 | { |
| 7377 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to " |
| 7378 | "create child process to send success-dsn message: %s", getpid(), |
| 7379 | getppid(), strerror(errno)); |
| 7380 | |
| 7381 | DEBUG(D_deliver) debug_printf("DSN: child_open_exim failed\n"); |
| 7382 | } |
| 7383 | else /* Creation of child succeeded */ |
| 7384 | { |
| 7385 | FILE * f = fdopen(fd, "wb"); |
| 7386 | /* header only as required by RFC. only failure DSN needs to honor RET=FULL */ |
| 7387 | uschar * bound; |
| 7388 | transport_ctx tctx = {{0}}; |
| 7389 | |
| 7390 | DEBUG(D_deliver) |
| 7391 | debug_printf("sending success-dsn to: %s\n", sender_address); |
| 7392 | |
| 7393 | /* build unique id for MIME boundary */ |
| 7394 | bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand()); |
| 7395 | DEBUG(D_deliver) debug_printf("DSN: MIME boundary: %s\n", bound); |
| 7396 | |
| 7397 | if (errors_reply_to) |
| 7398 | fprintf(f, "Reply-To: %s\n", errors_reply_to); |
| 7399 | |
| 7400 | moan_write_from(f); |
| 7401 | fprintf(f, "Auto-Submitted: auto-generated\n" |
| 7402 | "To: %s\n" |
| 7403 | "Subject: Delivery Status Notification\n", |
| 7404 | sender_address); |
| 7405 | moan_write_references(f, NULL); |
| 7406 | fprintf(f, "Content-Type: multipart/report;" |
| 7407 | " report-type=delivery-status; boundary=%s\n" |
| 7408 | "MIME-Version: 1.0\n\n" |
| 7409 | |
| 7410 | "--%s\n" |
| 7411 | "Content-type: text/plain; charset=us-ascii\n\n" |
| 7412 | |
| 7413 | "This message was created automatically by mail delivery software.\n" |
| 7414 | " ----- The following addresses had successful delivery notifications -----\n", |
| 7415 | bound, bound); |
| 7416 | |
| 7417 | for (address_item * a = addr_senddsn; a; a = a->next) |
| 7418 | fprintf(f, "<%s> (relayed %s)\n\n", |
| 7419 | a->address, |
| 7420 | a->dsn_flags & rf_dsnlasthop ? "via non DSN router" |
| 7421 | : a->dsn_aware == dsn_support_no ? "to non-DSN-aware mailer" |
| 7422 | : "via non \"Remote SMTP\" router" |
| 7423 | ); |
| 7424 | |
| 7425 | fprintf(f, "--%s\n" |
| 7426 | "Content-type: message/delivery-status\n\n" |
| 7427 | "Reporting-MTA: dns; %s\n", |
| 7428 | bound, smtp_active_hostname); |
| 7429 | |
| 7430 | if (dsn_envid) |
| 7431 | { /* must be decoded from xtext: see RFC 3461:6.3a */ |
| 7432 | uschar *xdec_envid; |
| 7433 | if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0) |
| 7434 | fprintf(f, "Original-Envelope-ID: %s\n", dsn_envid); |
| 7435 | else |
| 7436 | fprintf(f, "X-Original-Envelope-ID: error decoding xtext formatted ENVID\n"); |
| 7437 | } |
| 7438 | fputc('\n', f); |
| 7439 | |
| 7440 | for (address_item * a = addr_senddsn; a; a = a->next) |
| 7441 | { |
| 7442 | host_item * hu; |
| 7443 | |
| 7444 | print_dsn_addr_action(f, a, US"delivered", US"2.0.0"); |
| 7445 | |
| 7446 | if ((hu = a->host_used) && hu->name) |
| 7447 | fprintf(f, "Remote-MTA: dns; %s\nDiagnostic-Code: smtp; 250 Ok\n\n", |
| 7448 | hu->name); |
| 7449 | else |
| 7450 | fprintf(f, "Diagnostic-Code: X-Exim; relayed via non %s router\n\n", |
| 7451 | a->dsn_flags & rf_dsnlasthop ? "DSN" : "SMTP"); |
| 7452 | } |
| 7453 | |
| 7454 | fprintf(f, "--%s\nContent-type: text/rfc822-headers\n\n", bound); |
| 7455 | |
| 7456 | fflush(f); |
| 7457 | transport_filter_argv = NULL; /* Just in case */ |
| 7458 | return_path = sender_address; /* In case not previously set */ |
| 7459 | |
| 7460 | /* Write the original email out */ |
| 7461 | |
| 7462 | tctx.u.fd = fd; |
| 7463 | tctx.options = topt_add_return_path | topt_no_body; |
| 7464 | /*XXX hmm, FALSE(fail) retval ignored. |
| 7465 | Could error for any number of reasons, and they are not handled. */ |
| 7466 | transport_write_message(&tctx, 0); |
| 7467 | fflush(f); |
| 7468 | |
| 7469 | fprintf(f,"\n--%s--\n", bound); |
| 7470 | |
| 7471 | fflush(f); |
| 7472 | fclose(f); |
| 7473 | rc = child_close(pid, 0); /* Waits for child to close, no timeout */ |
| 7474 | } |
| 7475 | } |
| 7476 | |
| 7477 | /* If any addresses failed, we must send a message to somebody, unless |
| 7478 | af_ignore_error is set, in which case no action is taken. It is possible for |
| 7479 | several messages to get sent if there are addresses with different |
| 7480 | requirements. */ |
| 7481 | |
| 7482 | while (addr_failed) |
| 7483 | { |
| 7484 | pid_t pid; |
| 7485 | int fd; |
| 7486 | uschar *logtod = tod_stamp(tod_log); |
| 7487 | address_item *addr; |
| 7488 | address_item *handled_addr = NULL; |
| 7489 | address_item **paddr; |
| 7490 | address_item *msgchain = NULL; |
| 7491 | address_item **pmsgchain = &msgchain; |
| 7492 | |
| 7493 | /* There are weird cases when logging is disabled in the transport. However, |
| 7494 | there may not be a transport (address failed by a router). */ |
| 7495 | |
| 7496 | f.disable_logging = FALSE; |
| 7497 | if (addr_failed->transport) |
| 7498 | f.disable_logging = addr_failed->transport->disable_logging; |
| 7499 | |
| 7500 | DEBUG(D_deliver) |
| 7501 | debug_printf("processing failed address %s\n", addr_failed->address); |
| 7502 | |
| 7503 | /* There are only two ways an address in a bounce message can get here: |
| 7504 | |
| 7505 | (1) When delivery was initially deferred, but has now timed out (in the call |
| 7506 | to retry_update() above). We can detect this by testing for |
| 7507 | af_retry_timedout. If the address does not have its own errors address, |
| 7508 | we arrange to ignore the error. |
| 7509 | |
| 7510 | (2) If delivery failures for bounce messages are being ignored. We can detect |
| 7511 | this by testing for af_ignore_error. This will also be set if a bounce |
| 7512 | message has been autothawed and the ignore_bounce_errors_after time has |
| 7513 | passed. It might also be set if a router was explicitly configured to |
| 7514 | ignore errors (errors_to = ""). |
| 7515 | |
| 7516 | If neither of these cases obtains, something has gone wrong. Log the |
| 7517 | incident, but then ignore the error. */ |
| 7518 | |
| 7519 | if (sender_address[0] == 0 && !addr_failed->prop.errors_address) |
| 7520 | { |
| 7521 | if ( !testflag(addr_failed, af_retry_timedout) |
| 7522 | && !addr_failed->prop.ignore_error) |
| 7523 | log_write(0, LOG_MAIN|LOG_PANIC, "internal error: bounce message " |
| 7524 | "failure is neither frozen nor ignored (it's been ignored)"); |
| 7525 | |
| 7526 | addr_failed->prop.ignore_error = TRUE; |
| 7527 | } |
| 7528 | |
| 7529 | /* If the first address on the list has af_ignore_error set, just remove |
| 7530 | it from the list, throw away any saved message file, log it, and |
| 7531 | mark the recipient done. */ |
| 7532 | |
| 7533 | if ( addr_failed->prop.ignore_error |
| 7534 | || addr_failed->dsn_flags & rf_dsnflags |
| 7535 | && !(addr_failed->dsn_flags & rf_notify_failure) |
| 7536 | ) |
| 7537 | { |
| 7538 | addr = addr_failed; |
| 7539 | addr_failed = addr->next; |
| 7540 | if (addr->return_filename) Uunlink(addr->return_filename); |
| 7541 | |
| 7542 | #ifndef DISABLE_EVENT |
| 7543 | msg_event_raise(US"msg:fail:delivery", addr); |
| 7544 | #endif |
| 7545 | log_write(0, LOG_MAIN, "%s%s%s%s: error ignored%s", |
| 7546 | addr->address, |
| 7547 | !addr->parent ? US"" : US" <", |
| 7548 | !addr->parent ? US"" : addr->parent->address, |
| 7549 | !addr->parent ? US"" : US">", |
| 7550 | addr->prop.ignore_error |
| 7551 | ? US"" : US": RFC 3461 DSN, failure notify not requested"); |
| 7552 | |
| 7553 | address_done(addr, logtod); |
| 7554 | child_done(addr, logtod); |
| 7555 | /* Panic-dies on error */ |
| 7556 | (void)spool_write_header(message_id, SW_DELIVERING, NULL); |
| 7557 | } |
| 7558 | |
| 7559 | /* Otherwise, handle the sending of a message. Find the error address for |
| 7560 | the first address, then send a message that includes all failed addresses |
| 7561 | that have the same error address. Note the bounce_recipient is a global so |
| 7562 | that it can be accessed by $bounce_recipient while creating a customized |
| 7563 | error message. */ |
| 7564 | |
| 7565 | else |
| 7566 | { |
| 7567 | if (!(bounce_recipient = addr_failed->prop.errors_address)) |
| 7568 | bounce_recipient = sender_address; |
| 7569 | |
| 7570 | /* Make a subprocess to send a message */ |
| 7571 | |
| 7572 | if ((pid = child_open_exim(&fd, US"bounce-message")) < 0) |
| 7573 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to " |
| 7574 | "create child process to send failure message: %s", getpid(), |
| 7575 | getppid(), strerror(errno)); |
| 7576 | |
| 7577 | /* Creation of child succeeded */ |
| 7578 | |
| 7579 | else |
| 7580 | { |
| 7581 | int ch, rc; |
| 7582 | int filecount = 0; |
| 7583 | int rcount = 0; |
| 7584 | uschar *bcc, *emf_text; |
| 7585 | FILE * fp = fdopen(fd, "wb"); |
| 7586 | FILE * emf = NULL; |
| 7587 | BOOL to_sender = strcmpic(sender_address, bounce_recipient) == 0; |
| 7588 | int max = (bounce_return_size_limit/DELIVER_IN_BUFFER_SIZE + 1) * |
| 7589 | DELIVER_IN_BUFFER_SIZE; |
| 7590 | uschar * bound; |
| 7591 | uschar *dsnlimitmsg; |
| 7592 | uschar *dsnnotifyhdr; |
| 7593 | int topt; |
| 7594 | |
| 7595 | DEBUG(D_deliver) |
| 7596 | debug_printf("sending error message to: %s\n", bounce_recipient); |
| 7597 | |
| 7598 | /* Scan the addresses for all that have the same errors address, removing |
| 7599 | them from the addr_failed chain, and putting them on msgchain. */ |
| 7600 | |
| 7601 | paddr = &addr_failed; |
| 7602 | for (addr = addr_failed; addr; addr = *paddr) |
| 7603 | if (Ustrcmp(bounce_recipient, addr->prop.errors_address |
| 7604 | ? addr->prop.errors_address : sender_address) == 0) |
| 7605 | { /* The same - dechain */ |
| 7606 | *paddr = addr->next; |
| 7607 | *pmsgchain = addr; |
| 7608 | addr->next = NULL; |
| 7609 | pmsgchain = &(addr->next); |
| 7610 | } |
| 7611 | else |
| 7612 | paddr = &addr->next; /* Not the same; skip */ |
| 7613 | |
| 7614 | /* Include X-Failed-Recipients: for automatic interpretation, but do |
| 7615 | not let any one header line get too long. We do this by starting a |
| 7616 | new header every 50 recipients. Omit any addresses for which the |
| 7617 | "hide_child" flag is set. */ |
| 7618 | |
| 7619 | for (addr = msgchain; addr; addr = addr->next) |
| 7620 | { |
| 7621 | if (testflag(addr, af_hide_child)) continue; |
| 7622 | if (rcount >= 50) |
| 7623 | { |
| 7624 | fprintf(fp, "\n"); |
| 7625 | rcount = 0; |
| 7626 | } |
| 7627 | fprintf(fp, "%s%s", |
| 7628 | rcount++ == 0 |
| 7629 | ? "X-Failed-Recipients: " |
| 7630 | : ",\n ", |
| 7631 | testflag(addr, af_pfr) && addr->parent |
| 7632 | ? string_printing(addr->parent->address) |
| 7633 | : string_printing(addr->address)); |
| 7634 | } |
| 7635 | if (rcount > 0) fprintf(fp, "\n"); |
| 7636 | |
| 7637 | /* Output the standard headers */ |
| 7638 | |
| 7639 | if (errors_reply_to) |
| 7640 | fprintf(fp, "Reply-To: %s\n", errors_reply_to); |
| 7641 | fprintf(fp, "Auto-Submitted: auto-replied\n"); |
| 7642 | moan_write_from(fp); |
| 7643 | fprintf(fp, "To: %s\n", bounce_recipient); |
| 7644 | moan_write_references(fp, NULL); |
| 7645 | |
| 7646 | /* generate boundary string and output MIME-Headers */ |
| 7647 | bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand()); |
| 7648 | |
| 7649 | fprintf(fp, "Content-Type: multipart/report;" |
| 7650 | " report-type=delivery-status; boundary=%s\n" |
| 7651 | "MIME-Version: 1.0\n", |
| 7652 | bound); |
| 7653 | |
| 7654 | /* Open a template file if one is provided. Log failure to open, but |
| 7655 | carry on - default texts will be used. */ |
| 7656 | |
| 7657 | if (bounce_message_file) |
| 7658 | emf = expand_open(bounce_message_file, |
| 7659 | US"bounce_message_file", US"error"); |
| 7660 | |
| 7661 | /* Quietly copy to configured additional addresses if required. */ |
| 7662 | |
| 7663 | if ((bcc = moan_check_errorcopy(bounce_recipient))) |
| 7664 | fprintf(fp, "Bcc: %s\n", bcc); |
| 7665 | |
| 7666 | /* The texts for the message can be read from a template file; if there |
| 7667 | isn't one, or if it is too short, built-in texts are used. The first |
| 7668 | emf text is a Subject: and any other headers. */ |
| 7669 | |
| 7670 | if ((emf_text = next_emf(emf, US"header"))) |
| 7671 | fprintf(fp, "%s\n", emf_text); |
| 7672 | else |
| 7673 | fprintf(fp, "Subject: Mail delivery failed%s\n\n", |
| 7674 | to_sender? ": returning message to sender" : ""); |
| 7675 | |
| 7676 | /* output human readable part as text/plain section */ |
| 7677 | fprintf(fp, "--%s\n" |
| 7678 | "Content-type: text/plain; charset=us-ascii\n\n", |
| 7679 | bound); |
| 7680 | |
| 7681 | if ((emf_text = next_emf(emf, US"intro"))) |
| 7682 | fprintf(fp, "%s", CS emf_text); |
| 7683 | else |
| 7684 | { |
| 7685 | fprintf(fp, |
| 7686 | /* This message has been reworded several times. It seems to be confusing to |
| 7687 | somebody, however it is worded. I have retreated to the original, simple |
| 7688 | wording. */ |
| 7689 | "This message was created automatically by mail delivery software.\n"); |
| 7690 | |
| 7691 | if (bounce_message_text) |
| 7692 | fprintf(fp, "%s", CS bounce_message_text); |
| 7693 | if (to_sender) |
| 7694 | fprintf(fp, |
| 7695 | "\nA message that you sent could not be delivered to one or more of its\n" |
| 7696 | "recipients. This is a permanent error. The following address(es) failed:\n"); |
| 7697 | else |
| 7698 | fprintf(fp, |
| 7699 | "\nA message sent by\n\n <%s>\n\n" |
| 7700 | "could not be delivered to one or more of its recipients. The following\n" |
| 7701 | "address(es) failed:\n", sender_address); |
| 7702 | } |
| 7703 | fputc('\n', fp); |
| 7704 | |
| 7705 | /* Process the addresses, leaving them on the msgchain if they have a |
| 7706 | file name for a return message. (There has already been a check in |
| 7707 | post_process_one() for the existence of data in the message file.) A TRUE |
| 7708 | return from print_address_information() means that the address is not |
| 7709 | hidden. */ |
| 7710 | |
| 7711 | paddr = &msgchain; |
| 7712 | for (addr = msgchain; addr; addr = *paddr) |
| 7713 | { |
| 7714 | if (print_address_information(addr, fp, US" ", US"\n ", US"")) |
| 7715 | print_address_error(addr, fp, US""); |
| 7716 | |
| 7717 | /* End the final line for the address */ |
| 7718 | |
| 7719 | fputc('\n', fp); |
| 7720 | |
| 7721 | /* Leave on msgchain if there's a return file. */ |
| 7722 | |
| 7723 | if (addr->return_file >= 0) |
| 7724 | { |
| 7725 | paddr = &(addr->next); |
| 7726 | filecount++; |
| 7727 | } |
| 7728 | |
| 7729 | /* Else save so that we can tick off the recipient when the |
| 7730 | message is sent. */ |
| 7731 | |
| 7732 | else |
| 7733 | { |
| 7734 | *paddr = addr->next; |
| 7735 | addr->next = handled_addr; |
| 7736 | handled_addr = addr; |
| 7737 | } |
| 7738 | } |
| 7739 | |
| 7740 | fputc('\n', fp); |
| 7741 | |
| 7742 | /* Get the next text, whether we need it or not, so as to be |
| 7743 | positioned for the one after. */ |
| 7744 | |
| 7745 | emf_text = next_emf(emf, US"generated text"); |
| 7746 | |
| 7747 | /* If there were any file messages passed by the local transports, |
| 7748 | include them in the message. Then put the address on the handled chain. |
| 7749 | In the case of a batch of addresses that were all sent to the same |
| 7750 | transport, the return_file field in all of them will contain the same |
| 7751 | fd, and the return_filename field in the *last* one will be set (to the |
| 7752 | name of the file). */ |
| 7753 | |
| 7754 | if (msgchain) |
| 7755 | { |
| 7756 | address_item *nextaddr; |
| 7757 | |
| 7758 | if (emf_text) |
| 7759 | fprintf(fp, "%s", CS emf_text); |
| 7760 | else |
| 7761 | fprintf(fp, |
| 7762 | "The following text was generated during the delivery " |
| 7763 | "attempt%s:\n", (filecount > 1)? "s" : ""); |
| 7764 | |
| 7765 | for (addr = msgchain; addr; addr = nextaddr) |
| 7766 | { |
| 7767 | FILE *fm; |
| 7768 | address_item *topaddr = addr; |
| 7769 | |
| 7770 | /* List all the addresses that relate to this file */ |
| 7771 | |
| 7772 | fputc('\n', fp); |
| 7773 | while(addr) /* Insurance */ |
| 7774 | { |
| 7775 | print_address_information(addr, fp, US"------ ", US"\n ", |
| 7776 | US" ------\n"); |
| 7777 | if (addr->return_filename) break; |
| 7778 | addr = addr->next; |
| 7779 | } |
| 7780 | fputc('\n', fp); |
| 7781 | |
| 7782 | /* Now copy the file */ |
| 7783 | |
| 7784 | if (!(fm = Ufopen(addr->return_filename, "rb"))) |
| 7785 | fprintf(fp, " +++ Exim error... failed to open text file: %s\n", |
| 7786 | strerror(errno)); |
| 7787 | else |
| 7788 | { |
| 7789 | while ((ch = fgetc(fm)) != EOF) fputc(ch, fp); |
| 7790 | (void)fclose(fm); |
| 7791 | } |
| 7792 | Uunlink(addr->return_filename); |
| 7793 | |
| 7794 | /* Can now add to handled chain, first fishing off the next |
| 7795 | address on the msgchain. */ |
| 7796 | |
| 7797 | nextaddr = addr->next; |
| 7798 | addr->next = handled_addr; |
| 7799 | handled_addr = topaddr; |
| 7800 | } |
| 7801 | fputc('\n', fp); |
| 7802 | } |
| 7803 | |
| 7804 | /* output machine readable part */ |
| 7805 | #ifdef SUPPORT_I18N |
| 7806 | if (message_smtputf8) |
| 7807 | fprintf(fp, "--%s\n" |
| 7808 | "Content-type: message/global-delivery-status\n\n" |
| 7809 | "Reporting-MTA: dns; %s\n", |
| 7810 | bound, smtp_active_hostname); |
| 7811 | else |
| 7812 | #endif |
| 7813 | fprintf(fp, "--%s\n" |
| 7814 | "Content-type: message/delivery-status\n\n" |
| 7815 | "Reporting-MTA: dns; %s\n", |
| 7816 | bound, smtp_active_hostname); |
| 7817 | |
| 7818 | if (dsn_envid) |
| 7819 | { |
| 7820 | /* must be decoded from xtext: see RFC 3461:6.3a */ |
| 7821 | uschar *xdec_envid; |
| 7822 | if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0) |
| 7823 | fprintf(fp, "Original-Envelope-ID: %s\n", dsn_envid); |
| 7824 | else |
| 7825 | fprintf(fp, "X-Original-Envelope-ID: error decoding xtext formatted ENVID\n"); |
| 7826 | } |
| 7827 | fputc('\n', fp); |
| 7828 | |
| 7829 | for (addr = handled_addr; addr; addr = addr->next) |
| 7830 | { |
| 7831 | host_item * hu; |
| 7832 | |
| 7833 | print_dsn_addr_action(fp, addr, US"failed", US"5.0.0"); |
| 7834 | |
| 7835 | if ((hu = addr->host_used) && hu->name) |
| 7836 | { |
| 7837 | fprintf(fp, "Remote-MTA: dns; %s\n", hu->name); |
| 7838 | #ifdef EXPERIMENTAL_DSN_INFO |
| 7839 | { |
| 7840 | const uschar * s; |
| 7841 | if (hu->address) |
| 7842 | { |
| 7843 | uschar * p = hu->port == 25 |
| 7844 | ? US"" : string_sprintf(":%d", hu->port); |
| 7845 | fprintf(fp, "Remote-MTA: X-ip; [%s]%s\n", hu->address, p); |
| 7846 | } |
| 7847 | if ((s = addr->smtp_greeting) && *s) |
| 7848 | fprintf(fp, "X-Remote-MTA-smtp-greeting: X-str; %.900s\n", s); |
| 7849 | if ((s = addr->helo_response) && *s) |
| 7850 | fprintf(fp, "X-Remote-MTA-helo-response: X-str; %.900s\n", s); |
| 7851 | if ((s = addr->message) && *s) |
| 7852 | fprintf(fp, "X-Exim-Diagnostic: X-str; %.900s\n", s); |
| 7853 | } |
| 7854 | #endif |
| 7855 | print_dsn_diagnostic_code(addr, fp); |
| 7856 | } |
| 7857 | fputc('\n', fp); |
| 7858 | } |
| 7859 | |
| 7860 | /* Now copy the message, trying to give an intelligible comment if |
| 7861 | it is too long for it all to be copied. The limit isn't strictly |
| 7862 | applied because of the buffering. There is, however, an option |
| 7863 | to suppress copying altogether. */ |
| 7864 | |
| 7865 | emf_text = next_emf(emf, US"copy"); |
| 7866 | |
| 7867 | /* add message body |
| 7868 | we ignore the intro text from template and add |
| 7869 | the text for bounce_return_size_limit at the end. |
| 7870 | |
| 7871 | bounce_return_message is ignored |
| 7872 | in case RET= is defined we honor these values |
| 7873 | otherwise bounce_return_body is honored. |
| 7874 | |
| 7875 | bounce_return_size_limit is always honored. |
| 7876 | */ |
| 7877 | |
| 7878 | fprintf(fp, "--%s\n", bound); |
| 7879 | |
| 7880 | dsnlimitmsg = US"X-Exim-DSN-Information: Due to administrative limits only headers are returned"; |
| 7881 | dsnnotifyhdr = NULL; |
| 7882 | topt = topt_add_return_path; |
| 7883 | |
| 7884 | /* RET=HDRS? top priority */ |
| 7885 | if (dsn_ret == dsn_ret_hdrs) |
| 7886 | topt |= topt_no_body; |
| 7887 | else |
| 7888 | { |
| 7889 | struct stat statbuf; |
| 7890 | |
| 7891 | /* no full body return at all? */ |
| 7892 | if (!bounce_return_body) |
| 7893 | { |
| 7894 | topt |= topt_no_body; |
| 7895 | /* add header if we overrule RET=FULL */ |
| 7896 | if (dsn_ret == dsn_ret_full) |
| 7897 | dsnnotifyhdr = dsnlimitmsg; |
| 7898 | } |
| 7899 | /* line length limited... return headers only if oversize */ |
| 7900 | /* size limited ... return headers only if limit reached */ |
| 7901 | else if ( max_received_linelength > bounce_return_linesize_limit |
| 7902 | || ( bounce_return_size_limit > 0 |
| 7903 | && fstat(deliver_datafile, &statbuf) == 0 |
| 7904 | && statbuf.st_size > max |
| 7905 | ) ) |
| 7906 | { |
| 7907 | topt |= topt_no_body; |
| 7908 | dsnnotifyhdr = dsnlimitmsg; |
| 7909 | } |
| 7910 | } |
| 7911 | |
| 7912 | #ifdef SUPPORT_I18N |
| 7913 | if (message_smtputf8) |
| 7914 | fputs(topt & topt_no_body ? "Content-type: message/global-headers\n\n" |
| 7915 | : "Content-type: message/global\n\n", |
| 7916 | fp); |
| 7917 | else |
| 7918 | #endif |
| 7919 | fputs(topt & topt_no_body ? "Content-type: text/rfc822-headers\n\n" |
| 7920 | : "Content-type: message/rfc822\n\n", |
| 7921 | fp); |
| 7922 | |
| 7923 | fflush(fp); |
| 7924 | transport_filter_argv = NULL; /* Just in case */ |
| 7925 | return_path = sender_address; /* In case not previously set */ |
| 7926 | { /* Dummy transport for headers add */ |
| 7927 | transport_ctx tctx = {{0}}; |
| 7928 | transport_instance tb = {0}; |
| 7929 | |
| 7930 | tctx.u.fd = fileno(fp); |
| 7931 | tctx.tblock = &tb; |
| 7932 | tctx.options = topt; |
| 7933 | tb.add_headers = dsnnotifyhdr; |
| 7934 | |
| 7935 | /*XXX no checking for failure! buggy! */ |
| 7936 | transport_write_message(&tctx, 0); |
| 7937 | } |
| 7938 | fflush(fp); |
| 7939 | |
| 7940 | /* we never add the final text. close the file */ |
| 7941 | if (emf) |
| 7942 | (void)fclose(emf); |
| 7943 | |
| 7944 | fprintf(fp, "\n--%s--\n", bound); |
| 7945 | |
| 7946 | /* Close the file, which should send an EOF to the child process |
| 7947 | that is receiving the message. Wait for it to finish. */ |
| 7948 | |
| 7949 | (void)fclose(fp); |
| 7950 | rc = child_close(pid, 0); /* Waits for child to close, no timeout */ |
| 7951 | |
| 7952 | /* If the process failed, there was some disaster in setting up the |
| 7953 | error message. Unless the message is very old, ensure that addr_defer |
| 7954 | is non-null, which will have the effect of leaving the message on the |
| 7955 | spool. The failed addresses will get tried again next time. However, we |
| 7956 | don't really want this to happen too often, so freeze the message unless |
| 7957 | there are some genuine deferred addresses to try. To do this we have |
| 7958 | to call spool_write_header() here, because with no genuine deferred |
| 7959 | addresses the normal code below doesn't get run. */ |
| 7960 | |
| 7961 | if (rc != 0) |
| 7962 | { |
| 7963 | uschar *s = US""; |
| 7964 | if (now - received_time.tv_sec < retry_maximum_timeout && !addr_defer) |
| 7965 | { |
| 7966 | addr_defer = (address_item *)(+1); |
| 7967 | f.deliver_freeze = TRUE; |
| 7968 | deliver_frozen_at = time(NULL); |
| 7969 | /* Panic-dies on error */ |
| 7970 | (void)spool_write_header(message_id, SW_DELIVERING, NULL); |
| 7971 | s = US" (frozen)"; |
| 7972 | } |
| 7973 | deliver_msglog("Process failed (%d) when writing error message " |
| 7974 | "to %s%s", rc, bounce_recipient, s); |
| 7975 | log_write(0, LOG_MAIN, "Process failed (%d) when writing error message " |
| 7976 | "to %s%s", rc, bounce_recipient, s); |
| 7977 | } |
| 7978 | |
| 7979 | /* The message succeeded. Ensure that the recipients that failed are |
| 7980 | now marked finished with on the spool and their parents updated. */ |
| 7981 | |
| 7982 | else |
| 7983 | { |
| 7984 | for (addr = handled_addr; addr; addr = addr->next) |
| 7985 | { |
| 7986 | address_done(addr, logtod); |
| 7987 | child_done(addr, logtod); |
| 7988 | } |
| 7989 | /* Panic-dies on error */ |
| 7990 | (void)spool_write_header(message_id, SW_DELIVERING, NULL); |
| 7991 | } |
| 7992 | } |
| 7993 | } |
| 7994 | } |
| 7995 | |
| 7996 | f.disable_logging = FALSE; /* In case left set */ |
| 7997 | |
| 7998 | /* Come here from the mua_wrapper case if routing goes wrong */ |
| 7999 | |
| 8000 | DELIVERY_TIDYUP: |
| 8001 | |
| 8002 | /* If there are now no deferred addresses, we are done. Preserve the |
| 8003 | message log if so configured, and we are using them. Otherwise, sling it. |
| 8004 | Then delete the message itself. */ |
| 8005 | |
| 8006 | if (!addr_defer) |
| 8007 | { |
| 8008 | uschar * fname; |
| 8009 | |
| 8010 | if (message_logs) |
| 8011 | { |
| 8012 | fname = spool_fname(US"msglog", message_subdir, id, US""); |
| 8013 | if (preserve_message_logs) |
| 8014 | { |
| 8015 | int rc; |
| 8016 | uschar * moname = spool_fname(US"msglog.OLD", US"", id, US""); |
| 8017 | |
| 8018 | if ((rc = Urename(fname, moname)) < 0) |
| 8019 | { |
| 8020 | (void)directory_make(spool_directory, |
| 8021 | spool_sname(US"msglog.OLD", US""), |
| 8022 | MSGLOG_DIRECTORY_MODE, TRUE); |
| 8023 | rc = Urename(fname, moname); |
| 8024 | } |
| 8025 | if (rc < 0) |
| 8026 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to move %s to the " |
| 8027 | "msglog.OLD directory", fname); |
| 8028 | } |
| 8029 | else |
| 8030 | if (Uunlink(fname) < 0) |
| 8031 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s", |
| 8032 | fname, strerror(errno)); |
| 8033 | } |
| 8034 | |
| 8035 | /* Remove the two message files. */ |
| 8036 | |
| 8037 | fname = spool_fname(US"input", message_subdir, id, US"-D"); |
| 8038 | if (Uunlink(fname) < 0) |
| 8039 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s", |
| 8040 | fname, strerror(errno)); |
| 8041 | fname = spool_fname(US"input", message_subdir, id, US"-H"); |
| 8042 | if (Uunlink(fname) < 0) |
| 8043 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s", |
| 8044 | fname, strerror(errno)); |
| 8045 | |
| 8046 | /* Log the end of this message, with queue time if requested. */ |
| 8047 | |
| 8048 | if (LOGGING(queue_time_overall)) |
| 8049 | log_write(0, LOG_MAIN, "Completed QT=%s", string_timesince(&received_time)); |
| 8050 | else |
| 8051 | log_write(0, LOG_MAIN, "Completed"); |
| 8052 | |
| 8053 | /* Unset deliver_freeze so that we won't try to move the spool files further down */ |
| 8054 | f.deliver_freeze = FALSE; |
| 8055 | |
| 8056 | #ifndef DISABLE_EVENT |
| 8057 | (void) event_raise(event_action, US"msg:complete", NULL); |
| 8058 | #endif |
| 8059 | } |
| 8060 | |
| 8061 | /* If there are deferred addresses, we are keeping this message because it is |
| 8062 | not yet completed. Lose any temporary files that were catching output from |
| 8063 | pipes for any of the deferred addresses, handle one-time aliases, and see if |
| 8064 | the message has been on the queue for so long that it is time to send a warning |
| 8065 | message to the sender, unless it is a mailer-daemon. If all deferred addresses |
| 8066 | have the same domain, we can set deliver_domain for the expansion of |
| 8067 | delay_warning_ condition - if any of them are pipes, files, or autoreplies, use |
| 8068 | the parent's domain. |
| 8069 | |
| 8070 | If all the deferred addresses have an error number that indicates "retry time |
| 8071 | not reached", skip sending the warning message, because it won't contain the |
| 8072 | reason for the delay. It will get sent at the next real delivery attempt. |
| 8073 | Exception: for retries caused by a remote peer we use the error message |
| 8074 | store in the retry DB as the reason. |
| 8075 | However, if at least one address has tried, we'd better include all of them in |
| 8076 | the message. |
| 8077 | |
| 8078 | If we can't make a process to send the message, don't worry. |
| 8079 | |
| 8080 | For mailing list expansions we want to send the warning message to the |
| 8081 | mailing list manager. We can't do a perfect job here, as some addresses may |
| 8082 | have different errors addresses, but if we take the errors address from |
| 8083 | each deferred address it will probably be right in most cases. |
| 8084 | |
| 8085 | If addr_defer == +1, it means there was a problem sending an error message |
| 8086 | for failed addresses, and there were no "real" deferred addresses. The value |
| 8087 | was set just to keep the message on the spool, so there is nothing to do here. |
| 8088 | */ |
| 8089 | |
| 8090 | else if (addr_defer != (address_item *)(+1)) |
| 8091 | { |
| 8092 | uschar *recipients = US""; |
| 8093 | BOOL want_warning_msg = FALSE; |
| 8094 | |
| 8095 | deliver_domain = testflag(addr_defer, af_pfr) |
| 8096 | ? addr_defer->parent->domain : addr_defer->domain; |
| 8097 | |
| 8098 | for (address_item * addr = addr_defer; addr; addr = addr->next) |
| 8099 | { |
| 8100 | address_item *otaddr; |
| 8101 | |
| 8102 | if (addr->basic_errno > ERRNO_WARN_BASE) want_warning_msg = TRUE; |
| 8103 | |
| 8104 | if (deliver_domain) |
| 8105 | { |
| 8106 | const uschar *d = testflag(addr, af_pfr) |
| 8107 | ? addr->parent->domain : addr->domain; |
| 8108 | |
| 8109 | /* The domain may be unset for an address that has never been routed |
| 8110 | because the system filter froze the message. */ |
| 8111 | |
| 8112 | if (!d || Ustrcmp(d, deliver_domain) != 0) |
| 8113 | deliver_domain = NULL; |
| 8114 | } |
| 8115 | |
| 8116 | if (addr->return_filename) Uunlink(addr->return_filename); |
| 8117 | |
| 8118 | /* Handle the case of one-time aliases. If any address in the ancestry |
| 8119 | of this one is flagged, ensure it is in the recipients list, suitably |
| 8120 | flagged, and that its parent is marked delivered. */ |
| 8121 | |
| 8122 | for (otaddr = addr; otaddr; otaddr = otaddr->parent) |
| 8123 | if (otaddr->onetime_parent) break; |
| 8124 | |
| 8125 | if (otaddr) |
| 8126 | { |
| 8127 | int i; |
| 8128 | int t = recipients_count; |
| 8129 | |
| 8130 | for (i = 0; i < recipients_count; i++) |
| 8131 | { |
| 8132 | uschar *r = recipients_list[i].address; |
| 8133 | if (Ustrcmp(otaddr->onetime_parent, r) == 0) t = i; |
| 8134 | if (Ustrcmp(otaddr->address, r) == 0) break; |
| 8135 | } |
| 8136 | |
| 8137 | /* Didn't find the address already in the list, and did find the |
| 8138 | ultimate parent's address in the list, and they really are different |
| 8139 | (i.e. not from an identity-redirect). After adding the recipient, |
| 8140 | update the errors address in the recipients list. */ |
| 8141 | |
| 8142 | if ( i >= recipients_count && t < recipients_count |
| 8143 | && Ustrcmp(otaddr->address, otaddr->parent->address) != 0) |
| 8144 | { |
| 8145 | DEBUG(D_deliver) debug_printf("one_time: adding %s in place of %s\n", |
| 8146 | otaddr->address, otaddr->parent->address); |
| 8147 | receive_add_recipient(otaddr->address, t); |
| 8148 | recipients_list[recipients_count-1].errors_to = otaddr->prop.errors_address; |
| 8149 | tree_add_nonrecipient(otaddr->parent->address); |
| 8150 | update_spool = TRUE; |
| 8151 | } |
| 8152 | } |
| 8153 | |
| 8154 | /* Except for error messages, ensure that either the errors address for |
| 8155 | this deferred address or, if there is none, the sender address, is on the |
| 8156 | list of recipients for a warning message. */ |
| 8157 | |
| 8158 | if (sender_address[0]) |
| 8159 | { |
| 8160 | uschar * s = addr->prop.errors_address; |
| 8161 | if (!s) s = sender_address; |
| 8162 | if (Ustrstr(recipients, s) == NULL) |
| 8163 | recipients = string_sprintf("%s%s%s", recipients, |
| 8164 | recipients[0] ? "," : "", s); |
| 8165 | } |
| 8166 | } |
| 8167 | |
| 8168 | /* Send a warning message if the conditions are right. If the condition check |
| 8169 | fails because of a lookup defer, there is nothing we can do. The warning |
| 8170 | is not sent. Another attempt will be made at the next delivery attempt (if |
| 8171 | it also defers). */ |
| 8172 | |
| 8173 | if ( !f.queue_2stage |
| 8174 | && want_warning_msg |
| 8175 | && ( !(addr_defer->dsn_flags & rf_dsnflags) |
| 8176 | || addr_defer->dsn_flags & rf_notify_delay |
| 8177 | ) |
| 8178 | && delay_warning[1] > 0 |
| 8179 | && sender_address[0] != 0 |
| 8180 | && ( !delay_warning_condition |
| 8181 | || expand_check_condition(delay_warning_condition, |
| 8182 | US"delay_warning", US"option") |
| 8183 | ) |
| 8184 | ) |
| 8185 | { |
| 8186 | int count; |
| 8187 | int show_time; |
| 8188 | int queue_time = time(NULL) - received_time.tv_sec; |
| 8189 | |
| 8190 | queue_time = test_harness_fudged_queue_time(queue_time); |
| 8191 | |
| 8192 | /* See how many warnings we should have sent by now */ |
| 8193 | |
| 8194 | for (count = 0; count < delay_warning[1]; count++) |
| 8195 | if (queue_time < delay_warning[count+2]) break; |
| 8196 | |
| 8197 | show_time = delay_warning[count+1]; |
| 8198 | |
| 8199 | if (count >= delay_warning[1]) |
| 8200 | { |
| 8201 | int extra; |
| 8202 | int last_gap = show_time; |
| 8203 | if (count > 1) last_gap -= delay_warning[count]; |
| 8204 | extra = (queue_time - delay_warning[count+1])/last_gap; |
| 8205 | show_time += last_gap * extra; |
| 8206 | count += extra; |
| 8207 | } |
| 8208 | |
| 8209 | DEBUG(D_deliver) |
| 8210 | { |
| 8211 | debug_printf("time on queue = %s id %s addr %s\n", |
| 8212 | readconf_printtime(queue_time), message_id, addr_defer->address); |
| 8213 | debug_printf("warning counts: required %d done %d\n", count, |
| 8214 | warning_count); |
| 8215 | } |
| 8216 | |
| 8217 | /* We have computed the number of warnings there should have been by now. |
| 8218 | If there haven't been enough, send one, and up the count to what it should |
| 8219 | have been. */ |
| 8220 | |
| 8221 | if (warning_count < count) |
| 8222 | { |
| 8223 | header_line *h; |
| 8224 | int fd; |
| 8225 | pid_t pid = child_open_exim(&fd, US"delay-warning-message"); |
| 8226 | |
| 8227 | if (pid > 0) |
| 8228 | { |
| 8229 | uschar * wmf_text; |
| 8230 | FILE * wmf = NULL; |
| 8231 | FILE * f = fdopen(fd, "wb"); |
| 8232 | uschar * bound; |
| 8233 | transport_ctx tctx = {{0}}; |
| 8234 | |
| 8235 | if (warn_message_file) |
| 8236 | wmf = expand_open(warn_message_file, |
| 8237 | US"warn_message_file", US"warning"); |
| 8238 | |
| 8239 | warnmsg_recipients = recipients; |
| 8240 | warnmsg_delay = queue_time < 120*60 |
| 8241 | ? string_sprintf("%d minutes", show_time/60) |
| 8242 | : string_sprintf("%d hours", show_time/3600); |
| 8243 | |
| 8244 | if (errors_reply_to) |
| 8245 | fprintf(f, "Reply-To: %s\n", errors_reply_to); |
| 8246 | fprintf(f, "Auto-Submitted: auto-replied\n"); |
| 8247 | moan_write_from(f); |
| 8248 | fprintf(f, "To: %s\n", recipients); |
| 8249 | moan_write_references(f, NULL); |
| 8250 | |
| 8251 | /* generated boundary string and output MIME-Headers */ |
| 8252 | bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand()); |
| 8253 | |
| 8254 | fprintf(f, "Content-Type: multipart/report;" |
| 8255 | " report-type=delivery-status; boundary=%s\n" |
| 8256 | "MIME-Version: 1.0\n", |
| 8257 | bound); |
| 8258 | |
| 8259 | if ((wmf_text = next_emf(wmf, US"header"))) |
| 8260 | fprintf(f, "%s\n", wmf_text); |
| 8261 | else |
| 8262 | fprintf(f, "Subject: Warning: message %s delayed %s\n\n", |
| 8263 | message_id, warnmsg_delay); |
| 8264 | |
| 8265 | /* output human readable part as text/plain section */ |
| 8266 | fprintf(f, "--%s\n" |
| 8267 | "Content-type: text/plain; charset=us-ascii\n\n", |
| 8268 | bound); |
| 8269 | |
| 8270 | if ((wmf_text = next_emf(wmf, US"intro"))) |
| 8271 | fprintf(f, "%s", CS wmf_text); |
| 8272 | else |
| 8273 | { |
| 8274 | fprintf(f, |
| 8275 | "This message was created automatically by mail delivery software.\n"); |
| 8276 | |
| 8277 | if (Ustrcmp(recipients, sender_address) == 0) |
| 8278 | fprintf(f, |
| 8279 | "A message that you sent has not yet been delivered to one or more of its\n" |
| 8280 | "recipients after more than "); |
| 8281 | |
| 8282 | else |
| 8283 | fprintf(f, |
| 8284 | "A message sent by\n\n <%s>\n\n" |
| 8285 | "has not yet been delivered to one or more of its recipients after more than \n", |
| 8286 | sender_address); |
| 8287 | |
| 8288 | fprintf(f, "%s on the queue on %s.\n\n" |
| 8289 | "The message identifier is: %s\n", |
| 8290 | warnmsg_delay, primary_hostname, message_id); |
| 8291 | |
| 8292 | for (h = header_list; h; h = h->next) |
| 8293 | if (strncmpic(h->text, US"Subject:", 8) == 0) |
| 8294 | fprintf(f, "The subject of the message is: %s", h->text + 9); |
| 8295 | else if (strncmpic(h->text, US"Date:", 5) == 0) |
| 8296 | fprintf(f, "The date of the message is: %s", h->text + 6); |
| 8297 | fputc('\n', f); |
| 8298 | |
| 8299 | fprintf(f, "The address%s to which the message has not yet been " |
| 8300 | "delivered %s:\n", |
| 8301 | !addr_defer->next ? "" : "es", |
| 8302 | !addr_defer->next ? "is": "are"); |
| 8303 | } |
| 8304 | |
| 8305 | /* List the addresses, with error information if allowed */ |
| 8306 | |
| 8307 | fputc('\n', f); |
| 8308 | for (address_item * addr = addr_defer; addr; addr = addr->next) |
| 8309 | { |
| 8310 | if (print_address_information(addr, f, US" ", US"\n ", US"")) |
| 8311 | print_address_error(addr, f, US"Delay reason: "); |
| 8312 | fputc('\n', f); |
| 8313 | } |
| 8314 | fputc('\n', f); |
| 8315 | |
| 8316 | /* Final text */ |
| 8317 | |
| 8318 | if (wmf) |
| 8319 | { |
| 8320 | if ((wmf_text = next_emf(wmf, US"final"))) |
| 8321 | fprintf(f, "%s", CS wmf_text); |
| 8322 | (void)fclose(wmf); |
| 8323 | } |
| 8324 | else |
| 8325 | { |
| 8326 | fprintf(f, |
| 8327 | "No action is required on your part. Delivery attempts will continue for\n" |
| 8328 | "some time, and this warning may be repeated at intervals if the message\n" |
| 8329 | "remains undelivered. Eventually the mail delivery software will give up,\n" |
| 8330 | "and when that happens, the message will be returned to you.\n"); |
| 8331 | } |
| 8332 | |
| 8333 | /* output machine readable part */ |
| 8334 | fprintf(f, "\n--%s\n" |
| 8335 | "Content-type: message/delivery-status\n\n" |
| 8336 | "Reporting-MTA: dns; %s\n", |
| 8337 | bound, |
| 8338 | smtp_active_hostname); |
| 8339 | |
| 8340 | |
| 8341 | if (dsn_envid) |
| 8342 | { |
| 8343 | /* must be decoded from xtext: see RFC 3461:6.3a */ |
| 8344 | uschar *xdec_envid; |
| 8345 | if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0) |
| 8346 | fprintf(f,"Original-Envelope-ID: %s\n", dsn_envid); |
| 8347 | else |
| 8348 | fprintf(f,"X-Original-Envelope-ID: error decoding xtext formatted ENVID\n"); |
| 8349 | } |
| 8350 | fputc('\n', f); |
| 8351 | |
| 8352 | for (address_item * addr = addr_defer; addr; addr = addr->next) |
| 8353 | { |
| 8354 | host_item * hu; |
| 8355 | |
| 8356 | print_dsn_addr_action(f, addr, US"delayed", US"4.0.0"); |
| 8357 | |
| 8358 | if ((hu = addr->host_used) && hu->name) |
| 8359 | { |
| 8360 | fprintf(f, "Remote-MTA: dns; %s\n", hu->name); |
| 8361 | print_dsn_diagnostic_code(addr, f); |
| 8362 | } |
| 8363 | fputc('\n', f); |
| 8364 | } |
| 8365 | |
| 8366 | fprintf(f, "--%s\n" |
| 8367 | "Content-type: text/rfc822-headers\n\n", |
| 8368 | bound); |
| 8369 | |
| 8370 | fflush(f); |
| 8371 | /* header only as required by RFC. only failure DSN needs to honor RET=FULL */ |
| 8372 | tctx.u.fd = fileno(f); |
| 8373 | tctx.options = topt_add_return_path | topt_no_body; |
| 8374 | transport_filter_argv = NULL; /* Just in case */ |
| 8375 | return_path = sender_address; /* In case not previously set */ |
| 8376 | |
| 8377 | /* Write the original email out */ |
| 8378 | /*XXX no checking for failure! buggy! */ |
| 8379 | transport_write_message(&tctx, 0); |
| 8380 | fflush(f); |
| 8381 | |
| 8382 | fprintf(f,"\n--%s--\n", bound); |
| 8383 | |
| 8384 | fflush(f); |
| 8385 | |
| 8386 | /* Close and wait for child process to complete, without a timeout. |
| 8387 | If there's an error, don't update the count. */ |
| 8388 | |
| 8389 | (void)fclose(f); |
| 8390 | if (child_close(pid, 0) == 0) |
| 8391 | { |
| 8392 | warning_count = count; |
| 8393 | update_spool = TRUE; /* Ensure spool rewritten */ |
| 8394 | } |
| 8395 | } |
| 8396 | } |
| 8397 | } |
| 8398 | |
| 8399 | /* Clear deliver_domain */ |
| 8400 | |
| 8401 | deliver_domain = NULL; |
| 8402 | |
| 8403 | /* If this was a first delivery attempt, unset the first time flag, and |
| 8404 | ensure that the spool gets updated. */ |
| 8405 | |
| 8406 | if (f.deliver_firsttime) |
| 8407 | { |
| 8408 | f.deliver_firsttime = FALSE; |
| 8409 | update_spool = TRUE; |
| 8410 | } |
| 8411 | |
| 8412 | /* If delivery was frozen and freeze_tell is set, generate an appropriate |
| 8413 | message, unless the message is a local error message (to avoid loops). Then |
| 8414 | log the freezing. If the text in "frozen_info" came from a system filter, |
| 8415 | it has been escaped into printing characters so as not to mess up log lines. |
| 8416 | For the "tell" message, we turn \n back into newline. Also, insert a newline |
| 8417 | near the start instead of the ": " string. */ |
| 8418 | |
| 8419 | if (f.deliver_freeze) |
| 8420 | { |
| 8421 | if (freeze_tell && freeze_tell[0] != 0 && !f.local_error_message) |
| 8422 | { |
| 8423 | uschar *s = string_copy(frozen_info); |
| 8424 | uschar *ss = Ustrstr(s, " by the system filter: "); |
| 8425 | |
| 8426 | if (ss != NULL) |
| 8427 | { |
| 8428 | ss[21] = '.'; |
| 8429 | ss[22] = '\n'; |
| 8430 | } |
| 8431 | |
| 8432 | ss = s; |
| 8433 | while (*ss != 0) |
| 8434 | { |
| 8435 | if (*ss == '\\' && ss[1] == 'n') |
| 8436 | { |
| 8437 | *ss++ = ' '; |
| 8438 | *ss++ = '\n'; |
| 8439 | } |
| 8440 | else ss++; |
| 8441 | } |
| 8442 | moan_tell_someone(freeze_tell, addr_defer, US"Message frozen", |
| 8443 | "Message %s has been frozen%s.\nThe sender is <%s>.\n", message_id, |
| 8444 | s, sender_address); |
| 8445 | } |
| 8446 | |
| 8447 | /* Log freezing just before we update the -H file, to minimize the chance |
| 8448 | of a race problem. */ |
| 8449 | |
| 8450 | deliver_msglog("*** Frozen%s\n", frozen_info); |
| 8451 | log_write(0, LOG_MAIN, "Frozen%s", frozen_info); |
| 8452 | } |
| 8453 | |
| 8454 | /* If there have been any updates to the non-recipients list, or other things |
| 8455 | that get written to the spool, we must now update the spool header file so |
| 8456 | that it has the right information for the next delivery attempt. If there |
| 8457 | was more than one address being delivered, the header_change update is done |
| 8458 | earlier, in case one succeeds and then something crashes. */ |
| 8459 | |
| 8460 | DEBUG(D_deliver) |
| 8461 | debug_printf("delivery deferred: update_spool=%d header_rewritten=%d\n", |
| 8462 | update_spool, f.header_rewritten); |
| 8463 | |
| 8464 | if (update_spool || f.header_rewritten) |
| 8465 | /* Panic-dies on error */ |
| 8466 | (void)spool_write_header(message_id, SW_DELIVERING, NULL); |
| 8467 | } |
| 8468 | |
| 8469 | /* Finished with the message log. If the message is complete, it will have |
| 8470 | been unlinked or renamed above. */ |
| 8471 | |
| 8472 | if (message_logs) (void)fclose(message_log); |
| 8473 | |
| 8474 | /* Now we can close and remove the journal file. Its only purpose is to record |
| 8475 | successfully completed deliveries asap so that this information doesn't get |
| 8476 | lost if Exim (or the machine) crashes. Forgetting about a failed delivery is |
| 8477 | not serious, as trying it again is not harmful. The journal might not be open |
| 8478 | if all addresses were deferred at routing or directing. Nevertheless, we must |
| 8479 | remove it if it exists (may have been lying around from a crash during the |
| 8480 | previous delivery attempt). We don't remove the journal if a delivery |
| 8481 | subprocess failed to pass back delivery information; this is controlled by |
| 8482 | the remove_journal flag. When the journal is left, we also don't move the |
| 8483 | message off the main spool if frozen and the option is set. It should get moved |
| 8484 | at the next attempt, after the journal has been inspected. */ |
| 8485 | |
| 8486 | if (journal_fd >= 0) (void)close(journal_fd); |
| 8487 | |
| 8488 | if (remove_journal) |
| 8489 | { |
| 8490 | uschar * fname = spool_fname(US"input", message_subdir, id, US"-J"); |
| 8491 | |
| 8492 | if (Uunlink(fname) < 0 && errno != ENOENT) |
| 8493 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s", fname, |
| 8494 | strerror(errno)); |
| 8495 | |
| 8496 | /* Move the message off the spool if requested */ |
| 8497 | |
| 8498 | #ifdef SUPPORT_MOVE_FROZEN_MESSAGES |
| 8499 | if (f.deliver_freeze && move_frozen_messages) |
| 8500 | (void)spool_move_message(id, message_subdir, US"", US"F"); |
| 8501 | #endif |
| 8502 | } |
| 8503 | |
| 8504 | /* Closing the data file frees the lock; if the file has been unlinked it |
| 8505 | will go away. Otherwise the message becomes available for another process |
| 8506 | to try delivery. */ |
| 8507 | |
| 8508 | (void)close(deliver_datafile); |
| 8509 | deliver_datafile = -1; |
| 8510 | DEBUG(D_deliver) debug_printf("end delivery of %s\n", id); |
| 8511 | #ifdef MEASURE_TIMING |
| 8512 | report_time_since(×tamp_startup, US"delivery end"); /* testcase 0005 */ |
| 8513 | #endif |
| 8514 | |
| 8515 | /* It is unlikely that there will be any cached resources, since they are |
| 8516 | released after routing, and in the delivery subprocesses. However, it's |
| 8517 | possible for an expansion for something afterwards (for example, |
| 8518 | expand_check_condition) to do a lookup. We must therefore be sure everything is |
| 8519 | released. */ |
| 8520 | |
| 8521 | search_tidyup(); |
| 8522 | acl_where = ACL_WHERE_UNKNOWN; |
| 8523 | return final_yield; |
| 8524 | } |
| 8525 | |
| 8526 | |
| 8527 | |
| 8528 | void |
| 8529 | tcp_init(void) |
| 8530 | { |
| 8531 | #ifdef EXIM_TFO_PROBE |
| 8532 | tfo_probe(); |
| 8533 | #else |
| 8534 | f.tcp_fastopen_ok = TRUE; |
| 8535 | #endif |
| 8536 | } |
| 8537 | |
| 8538 | |
| 8539 | uschar * |
| 8540 | deliver_get_sender_address (uschar * id) |
| 8541 | { |
| 8542 | int rc; |
| 8543 | uschar * new_sender_address, |
| 8544 | * save_sender_address; |
| 8545 | BOOL save_qr = f.queue_running; |
| 8546 | uschar * spoolname; |
| 8547 | |
| 8548 | /* make spool_open_datafile non-noisy on fail */ |
| 8549 | |
| 8550 | f.queue_running = TRUE; |
| 8551 | |
| 8552 | /* Side effect: message_subdir is set for the (possibly split) spool directory */ |
| 8553 | |
| 8554 | deliver_datafile = spool_open_datafile(id); |
| 8555 | f.queue_running = save_qr; |
| 8556 | if (deliver_datafile < 0) |
| 8557 | return NULL; |
| 8558 | |
| 8559 | /* Save and restore the global sender_address. I'm not sure if we should |
| 8560 | not save/restore all the other global variables too, because |
| 8561 | spool_read_header() may change all of them. But OTOH, when this |
| 8562 | deliver_get_sender_address() gets called, the current message is done |
| 8563 | already and nobody needs the globals anymore. (HS12, 2015-08-21) */ |
| 8564 | |
| 8565 | spoolname = string_sprintf("%s-H", id); |
| 8566 | save_sender_address = sender_address; |
| 8567 | |
| 8568 | rc = spool_read_header(spoolname, TRUE, TRUE); |
| 8569 | |
| 8570 | new_sender_address = sender_address; |
| 8571 | sender_address = save_sender_address; |
| 8572 | |
| 8573 | if (rc != spool_read_OK) |
| 8574 | return NULL; |
| 8575 | |
| 8576 | assert(new_sender_address); |
| 8577 | |
| 8578 | (void)close(deliver_datafile); |
| 8579 | deliver_datafile = -1; |
| 8580 | |
| 8581 | return new_sender_address; |
| 8582 | } |
| 8583 | |
| 8584 | |
| 8585 | |
| 8586 | void |
| 8587 | delivery_re_exec(int exec_type) |
| 8588 | { |
| 8589 | uschar * where; |
| 8590 | |
| 8591 | if (cutthrough.cctx.sock >= 0 && cutthrough.callout_hold_only) |
| 8592 | { |
| 8593 | int channel_fd = cutthrough.cctx.sock; |
| 8594 | |
| 8595 | smtp_peer_options = cutthrough.peer_options; |
| 8596 | continue_sequence = 0; |
| 8597 | |
| 8598 | #ifndef DISABLE_TLS |
| 8599 | if (cutthrough.is_tls) |
| 8600 | { |
| 8601 | int pfd[2], pid; |
| 8602 | |
| 8603 | smtp_peer_options |= OPTION_TLS; |
| 8604 | sending_ip_address = cutthrough.snd_ip; |
| 8605 | sending_port = cutthrough.snd_port; |
| 8606 | |
| 8607 | where = US"socketpair"; |
| 8608 | if (socketpair(AF_UNIX, SOCK_STREAM, 0, pfd) != 0) |
| 8609 | goto fail; |
| 8610 | |
| 8611 | where = US"fork"; |
| 8612 | testharness_pause_ms(150); |
| 8613 | if ((pid = exim_fork(US"tls-proxy-interproc")) < 0) |
| 8614 | goto fail; |
| 8615 | |
| 8616 | if (pid == 0) /* child: will fork again to totally disconnect */ |
| 8617 | { |
| 8618 | smtp_proxy_tls(cutthrough.cctx.tls_ctx, big_buffer, big_buffer_size, |
| 8619 | pfd, 5*60); |
| 8620 | /* does not return */ |
| 8621 | } |
| 8622 | |
| 8623 | close(pfd[0]); |
| 8624 | waitpid(pid, NULL, 0); |
| 8625 | (void) close(channel_fd); /* release the client socket */ |
| 8626 | channel_fd = pfd[1]; |
| 8627 | } |
| 8628 | #endif |
| 8629 | |
| 8630 | transport_do_pass_socket(cutthrough.transport, cutthrough.host.name, |
| 8631 | cutthrough.host.address, message_id, channel_fd); |
| 8632 | } |
| 8633 | else |
| 8634 | { |
| 8635 | cancel_cutthrough_connection(TRUE, US"non-continued delivery"); |
| 8636 | (void) child_exec_exim(exec_type, FALSE, NULL, FALSE, 2, US"-Mc", message_id); |
| 8637 | } |
| 8638 | return; /* compiler quietening; control does not reach here. */ |
| 8639 | |
| 8640 | #ifndef DISABLE_TLS |
| 8641 | fail: |
| 8642 | log_write(0, |
| 8643 | LOG_MAIN | (exec_type == CEE_EXEC_EXIT ? LOG_PANIC : LOG_PANIC_DIE), |
| 8644 | "delivery re-exec %s failed: %s", where, strerror(errno)); |
| 8645 | |
| 8646 | /* Get here if exec_type == CEE_EXEC_EXIT. |
| 8647 | Note: this must be _exit(), not exit(). */ |
| 8648 | |
| 8649 | _exit(EX_EXECFAILED); |
| 8650 | #endif |
| 8651 | } |
| 8652 | |
| 8653 | /* vi: aw ai sw=2 |
| 8654 | */ |
| 8655 | /* End of deliver.c */ |