| 1 | /************************************************* |
| 2 | * Exim - an Internet mail transport agent * |
| 3 | *************************************************/ |
| 4 | |
| 5 | /* Copyright (c) University of Cambridge 1995 - 2018 */ |
| 6 | /* See the file NOTICE for conditions of use and distribution. */ |
| 7 | |
| 8 | /* The main code for delivering a message. */ |
| 9 | |
| 10 | |
| 11 | #include "exim.h" |
| 12 | #include "transports/smtp.h" |
| 13 | #include <sys/uio.h> |
| 14 | #include <assert.h> |
| 15 | |
| 16 | |
| 17 | /* Data block for keeping track of subprocesses for parallel remote |
| 18 | delivery. */ |
| 19 | |
| 20 | typedef struct pardata { |
| 21 | address_item *addrlist; /* chain of addresses */ |
| 22 | address_item *addr; /* next address data expected for */ |
| 23 | pid_t pid; /* subprocess pid */ |
| 24 | int fd; /* pipe fd for getting result from subprocess */ |
| 25 | int transport_count; /* returned transport count value */ |
| 26 | BOOL done; /* no more data needed */ |
| 27 | uschar *msg; /* error message */ |
| 28 | uschar *return_path; /* return_path for these addresses */ |
| 29 | } pardata; |
| 30 | |
| 31 | /* Values for the process_recipients variable */ |
| 32 | |
| 33 | enum { RECIP_ACCEPT, RECIP_IGNORE, RECIP_DEFER, |
| 34 | RECIP_FAIL, RECIP_FAIL_FILTER, RECIP_FAIL_TIMEOUT, |
| 35 | RECIP_FAIL_LOOP}; |
| 36 | |
| 37 | /* Mutually recursive functions for marking addresses done. */ |
| 38 | |
| 39 | static void child_done(address_item *, uschar *); |
| 40 | static void address_done(address_item *, uschar *); |
| 41 | |
| 42 | /* Table for turning base-62 numbers into binary */ |
| 43 | |
| 44 | static uschar tab62[] = |
| 45 | {0,1,2,3,4,5,6,7,8,9,0,0,0,0,0,0, /* 0-9 */ |
| 46 | 0,10,11,12,13,14,15,16,17,18,19,20, /* A-K */ |
| 47 | 21,22,23,24,25,26,27,28,29,30,31,32, /* L-W */ |
| 48 | 33,34,35, 0, 0, 0, 0, 0, /* X-Z */ |
| 49 | 0,36,37,38,39,40,41,42,43,44,45,46, /* a-k */ |
| 50 | 47,48,49,50,51,52,53,54,55,56,57,58, /* l-w */ |
| 51 | 59,60,61}; /* x-z */ |
| 52 | |
| 53 | |
| 54 | /************************************************* |
| 55 | * Local static variables * |
| 56 | *************************************************/ |
| 57 | |
| 58 | /* addr_duplicate is global because it needs to be seen from the Envelope-To |
| 59 | writing code. */ |
| 60 | |
| 61 | static address_item *addr_defer = NULL; |
| 62 | static address_item *addr_failed = NULL; |
| 63 | static address_item *addr_fallback = NULL; |
| 64 | static address_item *addr_local = NULL; |
| 65 | static address_item *addr_new = NULL; |
| 66 | static address_item *addr_remote = NULL; |
| 67 | static address_item *addr_route = NULL; |
| 68 | static address_item *addr_succeed = NULL; |
| 69 | static address_item *addr_senddsn = NULL; |
| 70 | |
| 71 | static FILE *message_log = NULL; |
| 72 | static BOOL update_spool; |
| 73 | static BOOL remove_journal; |
| 74 | static int parcount = 0; |
| 75 | static pardata *parlist = NULL; |
| 76 | static int return_count; |
| 77 | static uschar *frozen_info = US""; |
| 78 | static uschar *used_return_path = NULL; |
| 79 | |
| 80 | |
| 81 | |
| 82 | /************************************************* |
| 83 | * read as much as requested * |
| 84 | *************************************************/ |
| 85 | |
| 86 | /* The syscall read(2) doesn't always returns as much as we want. For |
| 87 | several reasons it might get less. (Not talking about signals, as syscalls |
| 88 | are restartable). When reading from a network or pipe connection the sender |
| 89 | might send in smaller chunks, with delays between these chunks. The read(2) |
| 90 | may return such a chunk. |
| 91 | |
| 92 | The more the writer writes and the smaller the pipe between write and read is, |
| 93 | the more we get the chance of reading leass than requested. (See bug 2130) |
| 94 | |
| 95 | This function read(2)s until we got all the data we *requested*. |
| 96 | |
| 97 | Note: This function may block. Use it only if you're sure about the |
| 98 | amount of data you will get. |
| 99 | |
| 100 | Argument: |
| 101 | fd the file descriptor to read from |
| 102 | buffer pointer to a buffer of size len |
| 103 | len the requested(!) amount of bytes |
| 104 | |
| 105 | Returns: the amount of bytes read |
| 106 | */ |
| 107 | static ssize_t |
| 108 | readn(int fd, void * buffer, size_t len) |
| 109 | { |
| 110 | uschar * next = buffer; |
| 111 | uschar * end = next + len; |
| 112 | |
| 113 | while (next < end) |
| 114 | { |
| 115 | ssize_t got = read(fd, next, end - next); |
| 116 | |
| 117 | /* I'm not sure if there are signals that can interrupt us, |
| 118 | for now I assume the worst */ |
| 119 | if (got == -1 && errno == EINTR) continue; |
| 120 | if (got <= 0) return next - US buffer; |
| 121 | next += got; |
| 122 | } |
| 123 | |
| 124 | return len; |
| 125 | } |
| 126 | |
| 127 | |
| 128 | /************************************************* |
| 129 | * Make a new address item * |
| 130 | *************************************************/ |
| 131 | |
| 132 | /* This function gets the store and initializes with default values. The |
| 133 | transport_return value defaults to DEFER, so that any unexpected failure to |
| 134 | deliver does not wipe out the message. The default unique string is set to a |
| 135 | copy of the address, so that its domain can be lowercased. |
| 136 | |
| 137 | Argument: |
| 138 | address the RFC822 address string |
| 139 | copy force a copy of the address |
| 140 | |
| 141 | Returns: a pointer to an initialized address_item |
| 142 | */ |
| 143 | |
| 144 | address_item * |
| 145 | deliver_make_addr(uschar *address, BOOL copy) |
| 146 | { |
| 147 | address_item *addr = store_get(sizeof(address_item), FALSE); |
| 148 | *addr = address_defaults; |
| 149 | if (copy) address = string_copy(address); |
| 150 | addr->address = address; |
| 151 | addr->unique = string_copy(address); |
| 152 | return addr; |
| 153 | } |
| 154 | |
| 155 | |
| 156 | |
| 157 | |
| 158 | /************************************************* |
| 159 | * Set expansion values for an address * |
| 160 | *************************************************/ |
| 161 | |
| 162 | /* Certain expansion variables are valid only when handling an address or |
| 163 | address list. This function sets them up or clears the values, according to its |
| 164 | argument. |
| 165 | |
| 166 | Arguments: |
| 167 | addr the address in question, or NULL to clear values |
| 168 | Returns: nothing |
| 169 | */ |
| 170 | |
| 171 | void |
| 172 | deliver_set_expansions(address_item *addr) |
| 173 | { |
| 174 | if (!addr) |
| 175 | { |
| 176 | const uschar ***p = address_expansions; |
| 177 | while (*p) **p++ = NULL; |
| 178 | return; |
| 179 | } |
| 180 | |
| 181 | /* Exactly what gets set depends on whether there is one or more addresses, and |
| 182 | what they contain. These first ones are always set, taking their values from |
| 183 | the first address. */ |
| 184 | |
| 185 | if (!addr->host_list) |
| 186 | { |
| 187 | deliver_host = deliver_host_address = US""; |
| 188 | deliver_host_port = 0; |
| 189 | } |
| 190 | else |
| 191 | { |
| 192 | deliver_host = addr->host_list->name; |
| 193 | deliver_host_address = addr->host_list->address; |
| 194 | deliver_host_port = addr->host_list->port; |
| 195 | } |
| 196 | |
| 197 | deliver_recipients = addr; |
| 198 | deliver_address_data = addr->prop.address_data; |
| 199 | deliver_domain_data = addr->prop.domain_data; |
| 200 | deliver_localpart_data = addr->prop.localpart_data; |
| 201 | router_var = addr->prop.variables; |
| 202 | |
| 203 | /* These may be unset for multiple addresses */ |
| 204 | |
| 205 | deliver_domain = addr->domain; |
| 206 | self_hostname = addr->self_hostname; |
| 207 | |
| 208 | #ifdef EXPERIMENTAL_BRIGHTMAIL |
| 209 | bmi_deliver = 1; /* deliver by default */ |
| 210 | bmi_alt_location = NULL; |
| 211 | bmi_base64_verdict = NULL; |
| 212 | bmi_base64_tracker_verdict = NULL; |
| 213 | #endif |
| 214 | |
| 215 | /* If there's only one address we can set everything. */ |
| 216 | |
| 217 | if (!addr->next) |
| 218 | { |
| 219 | address_item *addr_orig; |
| 220 | |
| 221 | deliver_localpart = addr->local_part; |
| 222 | deliver_localpart_prefix = addr->prefix; |
| 223 | deliver_localpart_suffix = addr->suffix; |
| 224 | |
| 225 | for (addr_orig = addr; addr_orig->parent; addr_orig = addr_orig->parent) ; |
| 226 | deliver_domain_orig = addr_orig->domain; |
| 227 | |
| 228 | /* Re-instate any prefix and suffix in the original local part. In all |
| 229 | normal cases, the address will have a router associated with it, and we can |
| 230 | choose the caseful or caseless version accordingly. However, when a system |
| 231 | filter sets up a pipe, file, or autoreply delivery, no router is involved. |
| 232 | In this case, though, there won't be any prefix or suffix to worry about. */ |
| 233 | |
| 234 | deliver_localpart_orig = !addr_orig->router |
| 235 | ? addr_orig->local_part |
| 236 | : addr_orig->router->caseful_local_part |
| 237 | ? addr_orig->cc_local_part |
| 238 | : addr_orig->lc_local_part; |
| 239 | |
| 240 | /* If there's a parent, make its domain and local part available, and if |
| 241 | delivering to a pipe or file, or sending an autoreply, get the local |
| 242 | part from the parent. For pipes and files, put the pipe or file string |
| 243 | into address_pipe and address_file. */ |
| 244 | |
| 245 | if (addr->parent) |
| 246 | { |
| 247 | deliver_domain_parent = addr->parent->domain; |
| 248 | deliver_localpart_parent = !addr->parent->router |
| 249 | ? addr->parent->local_part |
| 250 | : addr->parent->router->caseful_local_part |
| 251 | ? addr->parent->cc_local_part |
| 252 | : addr->parent->lc_local_part; |
| 253 | |
| 254 | /* File deliveries have their own flag because they need to be picked out |
| 255 | as special more often. */ |
| 256 | |
| 257 | if (testflag(addr, af_pfr)) |
| 258 | { |
| 259 | if (testflag(addr, af_file)) address_file = addr->local_part; |
| 260 | else if (deliver_localpart[0] == '|') address_pipe = addr->local_part; |
| 261 | deliver_localpart = addr->parent->local_part; |
| 262 | deliver_localpart_prefix = addr->parent->prefix; |
| 263 | deliver_localpart_suffix = addr->parent->suffix; |
| 264 | } |
| 265 | } |
| 266 | |
| 267 | #ifdef EXPERIMENTAL_BRIGHTMAIL |
| 268 | /* Set expansion variables related to Brightmail AntiSpam */ |
| 269 | bmi_base64_verdict = bmi_get_base64_verdict(deliver_localpart_orig, deliver_domain_orig); |
| 270 | bmi_base64_tracker_verdict = bmi_get_base64_tracker_verdict(bmi_base64_verdict); |
| 271 | /* get message delivery status (0 - don't deliver | 1 - deliver) */ |
| 272 | bmi_deliver = bmi_get_delivery_status(bmi_base64_verdict); |
| 273 | /* if message is to be delivered, get eventual alternate location */ |
| 274 | if (bmi_deliver == 1) |
| 275 | bmi_alt_location = bmi_get_alt_location(bmi_base64_verdict); |
| 276 | #endif |
| 277 | |
| 278 | } |
| 279 | |
| 280 | /* For multiple addresses, don't set local part, and leave the domain and |
| 281 | self_hostname set only if it is the same for all of them. It is possible to |
| 282 | have multiple pipe and file addresses, but only when all addresses have routed |
| 283 | to the same pipe or file. */ |
| 284 | |
| 285 | else |
| 286 | { |
| 287 | if (testflag(addr, af_pfr)) |
| 288 | { |
| 289 | if (testflag(addr, af_file)) address_file = addr->local_part; |
| 290 | else if (addr->local_part[0] == '|') address_pipe = addr->local_part; |
| 291 | } |
| 292 | for (address_item * addr2 = addr->next; addr2; addr2 = addr2->next) |
| 293 | { |
| 294 | if (deliver_domain && Ustrcmp(deliver_domain, addr2->domain) != 0) |
| 295 | deliver_domain = NULL; |
| 296 | if ( self_hostname |
| 297 | && ( !addr2->self_hostname |
| 298 | || Ustrcmp(self_hostname, addr2->self_hostname) != 0 |
| 299 | ) ) |
| 300 | self_hostname = NULL; |
| 301 | if (!deliver_domain && !self_hostname) break; |
| 302 | } |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | |
| 307 | |
| 308 | |
| 309 | /************************************************* |
| 310 | * Open a msglog file * |
| 311 | *************************************************/ |
| 312 | |
| 313 | /* This function is used both for normal message logs, and for files in the |
| 314 | msglog directory that are used to catch output from pipes. Try to create the |
| 315 | directory if it does not exist. From release 4.21, normal message logs should |
| 316 | be created when the message is received. |
| 317 | |
| 318 | Called from deliver_message(), can be operating as root. |
| 319 | |
| 320 | Argument: |
| 321 | filename the file name |
| 322 | mode the mode required |
| 323 | error used for saying what failed |
| 324 | |
| 325 | Returns: a file descriptor, or -1 (with errno set) |
| 326 | */ |
| 327 | |
| 328 | static int |
| 329 | open_msglog_file(uschar *filename, int mode, uschar **error) |
| 330 | { |
| 331 | if (Ustrstr(filename, US"/../")) |
| 332 | log_write(0, LOG_MAIN|LOG_PANIC, |
| 333 | "Attempt to open msglog file path with upward-traversal: '%s'\n", filename); |
| 334 | |
| 335 | for (int i = 2; i > 0; i--) |
| 336 | { |
| 337 | int fd = Uopen(filename, |
| 338 | #ifdef O_CLOEXEC |
| 339 | O_CLOEXEC | |
| 340 | #endif |
| 341 | #ifdef O_NOFOLLOW |
| 342 | O_NOFOLLOW | |
| 343 | #endif |
| 344 | O_WRONLY|O_APPEND|O_CREAT, mode); |
| 345 | if (fd >= 0) |
| 346 | { |
| 347 | /* Set the close-on-exec flag and change the owner to the exim uid/gid (this |
| 348 | function is called as root). Double check the mode, because the group setting |
| 349 | doesn't always get set automatically. */ |
| 350 | |
| 351 | #ifndef O_CLOEXEC |
| 352 | (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC); |
| 353 | #endif |
| 354 | if (exim_fchown(fd, exim_uid, exim_gid, filename) < 0) |
| 355 | { |
| 356 | *error = US"chown"; |
| 357 | return -1; |
| 358 | } |
| 359 | if (fchmod(fd, mode) < 0) |
| 360 | { |
| 361 | *error = US"chmod"; |
| 362 | return -1; |
| 363 | } |
| 364 | return fd; |
| 365 | } |
| 366 | if (errno != ENOENT) |
| 367 | break; |
| 368 | |
| 369 | (void)directory_make(spool_directory, |
| 370 | spool_sname(US"msglog", message_subdir), |
| 371 | MSGLOG_DIRECTORY_MODE, TRUE); |
| 372 | } |
| 373 | |
| 374 | *error = US"create or open"; |
| 375 | return -1; |
| 376 | } |
| 377 | |
| 378 | |
| 379 | |
| 380 | |
| 381 | /************************************************* |
| 382 | * Write to msglog if required * |
| 383 | *************************************************/ |
| 384 | |
| 385 | /* Write to the message log, if configured. This function may also be called |
| 386 | from transports. |
| 387 | |
| 388 | Arguments: |
| 389 | format a string format |
| 390 | |
| 391 | Returns: nothing |
| 392 | */ |
| 393 | |
| 394 | void |
| 395 | deliver_msglog(const char *format, ...) |
| 396 | { |
| 397 | va_list ap; |
| 398 | if (!message_logs) return; |
| 399 | va_start(ap, format); |
| 400 | vfprintf(message_log, format, ap); |
| 401 | fflush(message_log); |
| 402 | va_end(ap); |
| 403 | } |
| 404 | |
| 405 | |
| 406 | |
| 407 | |
| 408 | /************************************************* |
| 409 | * Replicate status for batch * |
| 410 | *************************************************/ |
| 411 | |
| 412 | /* When a transport handles a batch of addresses, it may treat them |
| 413 | individually, or it may just put the status in the first one, and return FALSE, |
| 414 | requesting that the status be copied to all the others externally. This is the |
| 415 | replication function. As well as the status, it copies the transport pointer, |
| 416 | which may have changed if appendfile passed the addresses on to a different |
| 417 | transport. |
| 418 | |
| 419 | Argument: pointer to the first address in a chain |
| 420 | Returns: nothing |
| 421 | */ |
| 422 | |
| 423 | static void |
| 424 | replicate_status(address_item *addr) |
| 425 | { |
| 426 | for (address_item * addr2 = addr->next; addr2; addr2 = addr2->next) |
| 427 | { |
| 428 | addr2->transport = addr->transport; |
| 429 | addr2->transport_return = addr->transport_return; |
| 430 | addr2->basic_errno = addr->basic_errno; |
| 431 | addr2->more_errno = addr->more_errno; |
| 432 | addr2->delivery_time = addr->delivery_time; |
| 433 | addr2->special_action = addr->special_action; |
| 434 | addr2->message = addr->message; |
| 435 | addr2->user_message = addr->user_message; |
| 436 | } |
| 437 | } |
| 438 | |
| 439 | |
| 440 | |
| 441 | /************************************************* |
| 442 | * Compare lists of hosts * |
| 443 | *************************************************/ |
| 444 | |
| 445 | /* This function is given two pointers to chains of host items, and it yields |
| 446 | TRUE if the lists refer to the same hosts in the same order, except that |
| 447 | |
| 448 | (1) Multiple hosts with the same non-negative MX values are permitted to appear |
| 449 | in different orders. Round-robinning nameservers can cause this to happen. |
| 450 | |
| 451 | (2) Multiple hosts with the same negative MX values less than MX_NONE are also |
| 452 | permitted to appear in different orders. This is caused by randomizing |
| 453 | hosts lists. |
| 454 | |
| 455 | This enables Exim to use a single SMTP transaction for sending to two entirely |
| 456 | different domains that happen to end up pointing at the same hosts. |
| 457 | |
| 458 | Arguments: |
| 459 | one points to the first host list |
| 460 | two points to the second host list |
| 461 | |
| 462 | Returns: TRUE if the lists refer to the same host set |
| 463 | */ |
| 464 | |
| 465 | static BOOL |
| 466 | same_hosts(host_item *one, host_item *two) |
| 467 | { |
| 468 | while (one && two) |
| 469 | { |
| 470 | if (Ustrcmp(one->name, two->name) != 0) |
| 471 | { |
| 472 | int mx = one->mx; |
| 473 | host_item *end_one = one; |
| 474 | host_item *end_two = two; |
| 475 | |
| 476 | /* Batch up only if there was no MX and the list was not randomized */ |
| 477 | |
| 478 | if (mx == MX_NONE) return FALSE; |
| 479 | |
| 480 | /* Find the ends of the shortest sequence of identical MX values */ |
| 481 | |
| 482 | while ( end_one->next && end_one->next->mx == mx |
| 483 | && end_two->next && end_two->next->mx == mx) |
| 484 | { |
| 485 | end_one = end_one->next; |
| 486 | end_two = end_two->next; |
| 487 | } |
| 488 | |
| 489 | /* If there aren't any duplicates, there's no match. */ |
| 490 | |
| 491 | if (end_one == one) return FALSE; |
| 492 | |
| 493 | /* For each host in the 'one' sequence, check that it appears in the 'two' |
| 494 | sequence, returning FALSE if not. */ |
| 495 | |
| 496 | for (;;) |
| 497 | { |
| 498 | host_item *hi; |
| 499 | for (hi = two; hi != end_two->next; hi = hi->next) |
| 500 | if (Ustrcmp(one->name, hi->name) == 0) break; |
| 501 | if (hi == end_two->next) return FALSE; |
| 502 | if (one == end_one) break; |
| 503 | one = one->next; |
| 504 | } |
| 505 | |
| 506 | /* All the hosts in the 'one' sequence were found in the 'two' sequence. |
| 507 | Ensure both are pointing at the last host, and carry on as for equality. */ |
| 508 | |
| 509 | two = end_two; |
| 510 | } |
| 511 | |
| 512 | /* if the names matched but ports do not, mismatch */ |
| 513 | else if (one->port != two->port) |
| 514 | return FALSE; |
| 515 | |
| 516 | /* Hosts matched */ |
| 517 | |
| 518 | one = one->next; |
| 519 | two = two->next; |
| 520 | } |
| 521 | |
| 522 | /* True if both are NULL */ |
| 523 | |
| 524 | return (one == two); |
| 525 | } |
| 526 | |
| 527 | |
| 528 | |
| 529 | /************************************************* |
| 530 | * Compare header lines * |
| 531 | *************************************************/ |
| 532 | |
| 533 | /* This function is given two pointers to chains of header items, and it yields |
| 534 | TRUE if they are the same header texts in the same order. |
| 535 | |
| 536 | Arguments: |
| 537 | one points to the first header list |
| 538 | two points to the second header list |
| 539 | |
| 540 | Returns: TRUE if the lists refer to the same header set |
| 541 | */ |
| 542 | |
| 543 | static BOOL |
| 544 | same_headers(header_line *one, header_line *two) |
| 545 | { |
| 546 | for (;; one = one->next, two = two->next) |
| 547 | { |
| 548 | if (one == two) return TRUE; /* Includes the case where both NULL */ |
| 549 | if (!one || !two) return FALSE; |
| 550 | if (Ustrcmp(one->text, two->text) != 0) return FALSE; |
| 551 | } |
| 552 | } |
| 553 | |
| 554 | |
| 555 | |
| 556 | /************************************************* |
| 557 | * Compare string settings * |
| 558 | *************************************************/ |
| 559 | |
| 560 | /* This function is given two pointers to strings, and it returns |
| 561 | TRUE if they are the same pointer, or if the two strings are the same. |
| 562 | |
| 563 | Arguments: |
| 564 | one points to the first string |
| 565 | two points to the second string |
| 566 | |
| 567 | Returns: TRUE or FALSE |
| 568 | */ |
| 569 | |
| 570 | static BOOL |
| 571 | same_strings(uschar *one, uschar *two) |
| 572 | { |
| 573 | if (one == two) return TRUE; /* Includes the case where both NULL */ |
| 574 | if (!one || !two) return FALSE; |
| 575 | return (Ustrcmp(one, two) == 0); |
| 576 | } |
| 577 | |
| 578 | |
| 579 | |
| 580 | /************************************************* |
| 581 | * Compare uid/gid for addresses * |
| 582 | *************************************************/ |
| 583 | |
| 584 | /* This function is given a transport and two addresses. It yields TRUE if the |
| 585 | uid/gid/initgroups settings for the two addresses are going to be the same when |
| 586 | they are delivered. |
| 587 | |
| 588 | Arguments: |
| 589 | tp the transort |
| 590 | addr1 the first address |
| 591 | addr2 the second address |
| 592 | |
| 593 | Returns: TRUE or FALSE |
| 594 | */ |
| 595 | |
| 596 | static BOOL |
| 597 | same_ugid(transport_instance *tp, address_item *addr1, address_item *addr2) |
| 598 | { |
| 599 | if ( !tp->uid_set && !tp->expand_uid |
| 600 | && !tp->deliver_as_creator |
| 601 | && ( testflag(addr1, af_uid_set) != testflag(addr2, af_gid_set) |
| 602 | || ( testflag(addr1, af_uid_set) |
| 603 | && ( addr1->uid != addr2->uid |
| 604 | || testflag(addr1, af_initgroups) != testflag(addr2, af_initgroups) |
| 605 | ) ) ) ) |
| 606 | return FALSE; |
| 607 | |
| 608 | if ( !tp->gid_set && !tp->expand_gid |
| 609 | && ( testflag(addr1, af_gid_set) != testflag(addr2, af_gid_set) |
| 610 | || ( testflag(addr1, af_gid_set) |
| 611 | && addr1->gid != addr2->gid |
| 612 | ) ) ) |
| 613 | return FALSE; |
| 614 | |
| 615 | return TRUE; |
| 616 | } |
| 617 | |
| 618 | |
| 619 | |
| 620 | |
| 621 | /************************************************* |
| 622 | * Record that an address is complete * |
| 623 | *************************************************/ |
| 624 | |
| 625 | /* This function records that an address is complete. This is straightforward |
| 626 | for most addresses, where the unique address is just the full address with the |
| 627 | domain lower cased. For homonyms (addresses that are the same as one of their |
| 628 | ancestors) their are complications. Their unique addresses have \x\ prepended |
| 629 | (where x = 0, 1, 2...), so that de-duplication works correctly for siblings and |
| 630 | cousins. |
| 631 | |
| 632 | Exim used to record the unique addresses of homonyms as "complete". This, |
| 633 | however, fails when the pattern of redirection varies over time (e.g. if taking |
| 634 | unseen copies at only some times of day) because the prepended numbers may vary |
| 635 | from one delivery run to the next. This problem is solved by never recording |
| 636 | prepended unique addresses as complete. Instead, when a homonymic address has |
| 637 | actually been delivered via a transport, we record its basic unique address |
| 638 | followed by the name of the transport. This is checked in subsequent delivery |
| 639 | runs whenever an address is routed to a transport. |
| 640 | |
| 641 | If the completed address is a top-level one (has no parent, which means it |
| 642 | cannot be homonymic) we also add the original address to the non-recipients |
| 643 | tree, so that it gets recorded in the spool file and therefore appears as |
| 644 | "done" in any spool listings. The original address may differ from the unique |
| 645 | address in the case of the domain. |
| 646 | |
| 647 | Finally, this function scans the list of duplicates, marks as done any that |
| 648 | match this address, and calls child_done() for their ancestors. |
| 649 | |
| 650 | Arguments: |
| 651 | addr address item that has been completed |
| 652 | now current time as a string |
| 653 | |
| 654 | Returns: nothing |
| 655 | */ |
| 656 | |
| 657 | static void |
| 658 | address_done(address_item *addr, uschar *now) |
| 659 | { |
| 660 | update_spool = TRUE; /* Ensure spool gets updated */ |
| 661 | |
| 662 | /* Top-level address */ |
| 663 | |
| 664 | if (!addr->parent) |
| 665 | { |
| 666 | tree_add_nonrecipient(addr->unique); |
| 667 | tree_add_nonrecipient(addr->address); |
| 668 | } |
| 669 | |
| 670 | /* Homonymous child address */ |
| 671 | |
| 672 | else if (testflag(addr, af_homonym)) |
| 673 | { |
| 674 | if (addr->transport) |
| 675 | tree_add_nonrecipient( |
| 676 | string_sprintf("%s/%s", addr->unique + 3, addr->transport->name)); |
| 677 | } |
| 678 | |
| 679 | /* Non-homonymous child address */ |
| 680 | |
| 681 | else tree_add_nonrecipient(addr->unique); |
| 682 | |
| 683 | /* Check the list of duplicate addresses and ensure they are now marked |
| 684 | done as well. */ |
| 685 | |
| 686 | for (address_item * dup = addr_duplicate; dup; dup = dup->next) |
| 687 | if (Ustrcmp(addr->unique, dup->unique) == 0) |
| 688 | { |
| 689 | tree_add_nonrecipient(dup->unique); |
| 690 | child_done(dup, now); |
| 691 | } |
| 692 | } |
| 693 | |
| 694 | |
| 695 | |
| 696 | |
| 697 | /************************************************* |
| 698 | * Decrease counts in parents and mark done * |
| 699 | *************************************************/ |
| 700 | |
| 701 | /* This function is called when an address is complete. If there is a parent |
| 702 | address, its count of children is decremented. If there are still other |
| 703 | children outstanding, the function exits. Otherwise, if the count has become |
| 704 | zero, address_done() is called to mark the parent and its duplicates complete. |
| 705 | Then loop for any earlier ancestors. |
| 706 | |
| 707 | Arguments: |
| 708 | addr points to the completed address item |
| 709 | now the current time as a string, for writing to the message log |
| 710 | |
| 711 | Returns: nothing |
| 712 | */ |
| 713 | |
| 714 | static void |
| 715 | child_done(address_item *addr, uschar *now) |
| 716 | { |
| 717 | while (addr->parent) |
| 718 | { |
| 719 | address_item *aa; |
| 720 | |
| 721 | addr = addr->parent; |
| 722 | if (--addr->child_count > 0) return; /* Incomplete parent */ |
| 723 | address_done(addr, now); |
| 724 | |
| 725 | /* Log the completion of all descendents only when there is no ancestor with |
| 726 | the same original address. */ |
| 727 | |
| 728 | for (aa = addr->parent; aa; aa = aa->parent) |
| 729 | if (Ustrcmp(aa->address, addr->address) == 0) break; |
| 730 | if (aa) continue; |
| 731 | |
| 732 | deliver_msglog("%s %s: children all complete\n", now, addr->address); |
| 733 | DEBUG(D_deliver) debug_printf("%s: children all complete\n", addr->address); |
| 734 | } |
| 735 | } |
| 736 | |
| 737 | |
| 738 | |
| 739 | /************************************************* |
| 740 | * Delivery logging support functions * |
| 741 | *************************************************/ |
| 742 | |
| 743 | /* The LOGGING() checks in d_log_interface() are complicated for backwards |
| 744 | compatibility. When outgoing interface logging was originally added, it was |
| 745 | conditional on just incoming_interface (which is off by default). The |
| 746 | outgoing_interface option is on by default to preserve this behaviour, but |
| 747 | you can enable incoming_interface and disable outgoing_interface to get I= |
| 748 | fields on incoming lines only. |
| 749 | |
| 750 | Arguments: |
| 751 | g The log line |
| 752 | addr The address to be logged |
| 753 | |
| 754 | Returns: New value for s |
| 755 | */ |
| 756 | |
| 757 | static gstring * |
| 758 | d_log_interface(gstring * g) |
| 759 | { |
| 760 | if (LOGGING(incoming_interface) && LOGGING(outgoing_interface) |
| 761 | && sending_ip_address) |
| 762 | { |
| 763 | g = string_fmt_append(g, " I=[%s]", sending_ip_address); |
| 764 | if (LOGGING(outgoing_port)) |
| 765 | g = string_fmt_append(g, ":%d", sending_port); |
| 766 | } |
| 767 | return g; |
| 768 | } |
| 769 | |
| 770 | |
| 771 | |
| 772 | static gstring * |
| 773 | d_hostlog(gstring * g, address_item * addr) |
| 774 | { |
| 775 | host_item * h = addr->host_used; |
| 776 | |
| 777 | g = string_append(g, 2, US" H=", h->name); |
| 778 | |
| 779 | if (LOGGING(dnssec) && h->dnssec == DS_YES) |
| 780 | g = string_catn(g, US" DS", 3); |
| 781 | |
| 782 | g = string_append(g, 3, US" [", h->address, US"]"); |
| 783 | |
| 784 | if (LOGGING(outgoing_port)) |
| 785 | g = string_fmt_append(g, ":%d", h->port); |
| 786 | |
| 787 | #ifdef SUPPORT_SOCKS |
| 788 | if (LOGGING(proxy) && proxy_local_address) |
| 789 | { |
| 790 | g = string_append(g, 3, US" PRX=[", proxy_local_address, US"]"); |
| 791 | if (LOGGING(outgoing_port)) |
| 792 | g = string_fmt_append(g, ":%d", proxy_local_port); |
| 793 | } |
| 794 | #endif |
| 795 | |
| 796 | g = d_log_interface(g); |
| 797 | |
| 798 | if (testflag(addr, af_tcp_fastopen)) |
| 799 | g = string_catn(g, US" TFO*", testflag(addr, af_tcp_fastopen_data) ? 5 : 4); |
| 800 | |
| 801 | return g; |
| 802 | } |
| 803 | |
| 804 | |
| 805 | |
| 806 | |
| 807 | |
| 808 | #ifndef DISABLE_TLS |
| 809 | static gstring * |
| 810 | d_tlslog(gstring * g, address_item * addr) |
| 811 | { |
| 812 | if (LOGGING(tls_cipher) && addr->cipher) |
| 813 | { |
| 814 | g = string_append(g, 2, US" X=", addr->cipher); |
| 815 | #ifdef EXPERIMENTAL_TLS_RESUME |
| 816 | if (LOGGING(tls_resumption) && testflag(addr, af_tls_resume)) |
| 817 | g = string_catn(g, US"*", 1); |
| 818 | #endif |
| 819 | } |
| 820 | if (LOGGING(tls_certificate_verified) && addr->cipher) |
| 821 | g = string_append(g, 2, US" CV=", |
| 822 | testflag(addr, af_cert_verified) |
| 823 | ? |
| 824 | #ifdef SUPPORT_DANE |
| 825 | testflag(addr, af_dane_verified) |
| 826 | ? "dane" |
| 827 | : |
| 828 | #endif |
| 829 | "yes" |
| 830 | : "no"); |
| 831 | if (LOGGING(tls_peerdn) && addr->peerdn) |
| 832 | g = string_append(g, 3, US" DN=\"", string_printing(addr->peerdn), US"\""); |
| 833 | return g; |
| 834 | } |
| 835 | #endif |
| 836 | |
| 837 | |
| 838 | |
| 839 | |
| 840 | #ifndef DISABLE_EVENT |
| 841 | uschar * |
| 842 | event_raise(uschar * action, const uschar * event, uschar * ev_data) |
| 843 | { |
| 844 | uschar * s; |
| 845 | if (action) |
| 846 | { |
| 847 | DEBUG(D_deliver) |
| 848 | debug_printf("Event(%s): event_action=|%s| delivery_IP=%s\n", |
| 849 | event, |
| 850 | action, deliver_host_address); |
| 851 | |
| 852 | event_name = event; |
| 853 | event_data = ev_data; |
| 854 | |
| 855 | if (!(s = expand_string(action)) && *expand_string_message) |
| 856 | log_write(0, LOG_MAIN|LOG_PANIC, |
| 857 | "failed to expand event_action %s in %s: %s\n", |
| 858 | event, transport_name ? transport_name : US"main", expand_string_message); |
| 859 | |
| 860 | event_name = event_data = NULL; |
| 861 | |
| 862 | /* If the expansion returns anything but an empty string, flag for |
| 863 | the caller to modify his normal processing |
| 864 | */ |
| 865 | if (s && *s) |
| 866 | { |
| 867 | DEBUG(D_deliver) |
| 868 | debug_printf("Event(%s): event_action returned \"%s\"\n", event, s); |
| 869 | errno = ERRNO_EVENT; |
| 870 | return s; |
| 871 | } |
| 872 | } |
| 873 | return NULL; |
| 874 | } |
| 875 | |
| 876 | void |
| 877 | msg_event_raise(const uschar * event, const address_item * addr) |
| 878 | { |
| 879 | const uschar * save_domain = deliver_domain; |
| 880 | uschar * save_local = deliver_localpart; |
| 881 | const uschar * save_host = deliver_host; |
| 882 | const uschar * save_address = deliver_host_address; |
| 883 | const int save_port = deliver_host_port; |
| 884 | |
| 885 | router_name = addr->router ? addr->router->name : NULL; |
| 886 | deliver_domain = addr->domain; |
| 887 | deliver_localpart = addr->local_part; |
| 888 | deliver_host = addr->host_used ? addr->host_used->name : NULL; |
| 889 | |
| 890 | if (!addr->transport) |
| 891 | { |
| 892 | if (Ustrcmp(event, "msg:fail:delivery") == 0) |
| 893 | { |
| 894 | /* An address failed with no transport involved. This happens when |
| 895 | a filter was used which triggered a fail command (in such a case |
| 896 | a transport isn't needed). Convert it to an internal fail event. */ |
| 897 | |
| 898 | (void) event_raise(event_action, US"msg:fail:internal", addr->message); |
| 899 | } |
| 900 | } |
| 901 | else |
| 902 | { |
| 903 | transport_name = addr->transport->name; |
| 904 | |
| 905 | (void) event_raise(addr->transport->event_action, event, |
| 906 | addr->host_used |
| 907 | || Ustrcmp(addr->transport->driver_name, "smtp") == 0 |
| 908 | || Ustrcmp(addr->transport->driver_name, "lmtp") == 0 |
| 909 | || Ustrcmp(addr->transport->driver_name, "autoreply") == 0 |
| 910 | ? addr->message : NULL); |
| 911 | } |
| 912 | |
| 913 | deliver_host_port = save_port; |
| 914 | deliver_host_address = save_address; |
| 915 | deliver_host = save_host; |
| 916 | deliver_localpart = save_local; |
| 917 | deliver_domain = save_domain; |
| 918 | router_name = transport_name = NULL; |
| 919 | } |
| 920 | #endif /*DISABLE_EVENT*/ |
| 921 | |
| 922 | |
| 923 | |
| 924 | /******************************************************************************/ |
| 925 | |
| 926 | |
| 927 | /************************************************* |
| 928 | * Generate local prt for logging * |
| 929 | *************************************************/ |
| 930 | |
| 931 | /* This function is a subroutine for use in string_log_address() below. |
| 932 | |
| 933 | Arguments: |
| 934 | addr the address being logged |
| 935 | yield the current dynamic buffer pointer |
| 936 | |
| 937 | Returns: the new value of the buffer pointer |
| 938 | */ |
| 939 | |
| 940 | static gstring * |
| 941 | string_get_localpart(address_item * addr, gstring * yield) |
| 942 | { |
| 943 | uschar * s; |
| 944 | |
| 945 | s = addr->prefix; |
| 946 | if (testflag(addr, af_include_affixes) && s) |
| 947 | { |
| 948 | #ifdef SUPPORT_I18N |
| 949 | if (testflag(addr, af_utf8_downcvt)) |
| 950 | s = string_localpart_utf8_to_alabel(s, NULL); |
| 951 | #endif |
| 952 | yield = string_cat(yield, s); |
| 953 | } |
| 954 | |
| 955 | s = addr->local_part; |
| 956 | #ifdef SUPPORT_I18N |
| 957 | if (testflag(addr, af_utf8_downcvt)) |
| 958 | s = string_localpart_utf8_to_alabel(s, NULL); |
| 959 | #endif |
| 960 | yield = string_cat(yield, s); |
| 961 | |
| 962 | s = addr->suffix; |
| 963 | if (testflag(addr, af_include_affixes) && s) |
| 964 | { |
| 965 | #ifdef SUPPORT_I18N |
| 966 | if (testflag(addr, af_utf8_downcvt)) |
| 967 | s = string_localpart_utf8_to_alabel(s, NULL); |
| 968 | #endif |
| 969 | yield = string_cat(yield, s); |
| 970 | } |
| 971 | |
| 972 | return yield; |
| 973 | } |
| 974 | |
| 975 | |
| 976 | /************************************************* |
| 977 | * Generate log address list * |
| 978 | *************************************************/ |
| 979 | |
| 980 | /* This function generates a list consisting of an address and its parents, for |
| 981 | use in logging lines. For saved onetime aliased addresses, the onetime parent |
| 982 | field is used. If the address was delivered by a transport with rcpt_include_ |
| 983 | affixes set, the af_include_affixes bit will be set in the address. In that |
| 984 | case, we include the affixes here too. |
| 985 | |
| 986 | Arguments: |
| 987 | g points to growing-string struct |
| 988 | addr bottom (ultimate) address |
| 989 | all_parents if TRUE, include all parents |
| 990 | success TRUE for successful delivery |
| 991 | |
| 992 | Returns: a growable string in dynamic store |
| 993 | */ |
| 994 | |
| 995 | static gstring * |
| 996 | string_log_address(gstring * g, |
| 997 | address_item *addr, BOOL all_parents, BOOL success) |
| 998 | { |
| 999 | BOOL add_topaddr = TRUE; |
| 1000 | address_item *topaddr; |
| 1001 | |
| 1002 | /* Find the ultimate parent */ |
| 1003 | |
| 1004 | for (topaddr = addr; topaddr->parent; topaddr = topaddr->parent) ; |
| 1005 | |
| 1006 | /* We start with just the local part for pipe, file, and reply deliveries, and |
| 1007 | for successful local deliveries from routers that have the log_as_local flag |
| 1008 | set. File deliveries from filters can be specified as non-absolute paths in |
| 1009 | cases where the transport is going to complete the path. If there is an error |
| 1010 | before this happens (expansion failure) the local part will not be updated, and |
| 1011 | so won't necessarily look like a path. Add extra text for this case. */ |
| 1012 | |
| 1013 | if ( testflag(addr, af_pfr) |
| 1014 | || ( success |
| 1015 | && addr->router && addr->router->log_as_local |
| 1016 | && addr->transport && addr->transport->info->local |
| 1017 | ) ) |
| 1018 | { |
| 1019 | if (testflag(addr, af_file) && addr->local_part[0] != '/') |
| 1020 | g = string_catn(g, CUS"save ", 5); |
| 1021 | g = string_get_localpart(addr, g); |
| 1022 | } |
| 1023 | |
| 1024 | /* Other deliveries start with the full address. It we have split it into local |
| 1025 | part and domain, use those fields. Some early failures can happen before the |
| 1026 | splitting is done; in those cases use the original field. */ |
| 1027 | |
| 1028 | else |
| 1029 | { |
| 1030 | uschar * cmp; |
| 1031 | int off = g->ptr; /* start of the "full address" */ |
| 1032 | |
| 1033 | if (addr->local_part) |
| 1034 | { |
| 1035 | const uschar * s; |
| 1036 | g = string_get_localpart(addr, g); |
| 1037 | g = string_catn(g, US"@", 1); |
| 1038 | s = addr->domain; |
| 1039 | #ifdef SUPPORT_I18N |
| 1040 | if (testflag(addr, af_utf8_downcvt)) |
| 1041 | s = string_localpart_utf8_to_alabel(s, NULL); |
| 1042 | #endif |
| 1043 | g = string_cat(g, s); |
| 1044 | } |
| 1045 | else |
| 1046 | g = string_cat(g, addr->address); |
| 1047 | |
| 1048 | /* If the address we are going to print is the same as the top address, |
| 1049 | and all parents are not being included, don't add on the top address. First |
| 1050 | of all, do a caseless comparison; if this succeeds, do a caseful comparison |
| 1051 | on the local parts. */ |
| 1052 | |
| 1053 | cmp = g->s + off; /* only now, as rebuffer likely done */ |
| 1054 | string_from_gstring(g); /* ensure nul-terminated */ |
| 1055 | if ( strcmpic(cmp, topaddr->address) == 0 |
| 1056 | && Ustrncmp(cmp, topaddr->address, Ustrchr(cmp, '@') - cmp) == 0 |
| 1057 | && !addr->onetime_parent |
| 1058 | && (!all_parents || !addr->parent || addr->parent == topaddr) |
| 1059 | ) |
| 1060 | add_topaddr = FALSE; |
| 1061 | } |
| 1062 | |
| 1063 | /* If all parents are requested, or this is a local pipe/file/reply, and |
| 1064 | there is at least one intermediate parent, show it in brackets, and continue |
| 1065 | with all of them if all are wanted. */ |
| 1066 | |
| 1067 | if ( (all_parents || testflag(addr, af_pfr)) |
| 1068 | && addr->parent |
| 1069 | && addr->parent != topaddr) |
| 1070 | { |
| 1071 | uschar *s = US" ("; |
| 1072 | for (address_item * addr2 = addr->parent; addr2 != topaddr; addr2 = addr2->parent) |
| 1073 | { |
| 1074 | g = string_catn(g, s, 2); |
| 1075 | g = string_cat (g, addr2->address); |
| 1076 | if (!all_parents) break; |
| 1077 | s = US", "; |
| 1078 | } |
| 1079 | g = string_catn(g, US")", 1); |
| 1080 | } |
| 1081 | |
| 1082 | /* Add the top address if it is required */ |
| 1083 | |
| 1084 | if (add_topaddr) |
| 1085 | g = string_append(g, 3, |
| 1086 | US" <", |
| 1087 | addr->onetime_parent ? addr->onetime_parent : topaddr->address, |
| 1088 | US">"); |
| 1089 | |
| 1090 | return g; |
| 1091 | } |
| 1092 | |
| 1093 | |
| 1094 | |
| 1095 | /******************************************************************************/ |
| 1096 | |
| 1097 | |
| 1098 | |
| 1099 | /* If msg is NULL this is a delivery log and logchar is used. Otherwise |
| 1100 | this is a nonstandard call; no two-character delivery flag is written |
| 1101 | but sender-host and sender are prefixed and "msg" is inserted in the log line. |
| 1102 | |
| 1103 | Arguments: |
| 1104 | flags passed to log_write() |
| 1105 | */ |
| 1106 | void |
| 1107 | delivery_log(int flags, address_item * addr, int logchar, uschar * msg) |
| 1108 | { |
| 1109 | gstring * g; /* Used for a temporary, expanding buffer, for building log lines */ |
| 1110 | rmark reset_point; |
| 1111 | |
| 1112 | /* Log the delivery on the main log. We use an extensible string to build up |
| 1113 | the log line, and reset the store afterwards. Remote deliveries should always |
| 1114 | have a pointer to the host item that succeeded; local deliveries can have a |
| 1115 | pointer to a single host item in their host list, for use by the transport. */ |
| 1116 | |
| 1117 | #ifndef DISABLE_EVENT |
| 1118 | /* presume no successful remote delivery */ |
| 1119 | lookup_dnssec_authenticated = NULL; |
| 1120 | #endif |
| 1121 | |
| 1122 | reset_point = store_mark(); |
| 1123 | g = string_get_tainted(256, TRUE); /* addrs will be tainted, so avoid copy */ |
| 1124 | |
| 1125 | if (msg) |
| 1126 | g = string_append(g, 2, host_and_ident(TRUE), US" "); |
| 1127 | else |
| 1128 | { |
| 1129 | g->s[0] = logchar; g->ptr = 1; |
| 1130 | g = string_catn(g, US"> ", 2); |
| 1131 | } |
| 1132 | g = string_log_address(g, addr, LOGGING(all_parents), TRUE); |
| 1133 | |
| 1134 | if (LOGGING(sender_on_delivery) || msg) |
| 1135 | g = string_append(g, 3, US" F=<", |
| 1136 | #ifdef SUPPORT_I18N |
| 1137 | testflag(addr, af_utf8_downcvt) |
| 1138 | ? string_address_utf8_to_alabel(sender_address, NULL) |
| 1139 | : |
| 1140 | #endif |
| 1141 | sender_address, |
| 1142 | US">"); |
| 1143 | |
| 1144 | if (*queue_name) |
| 1145 | g = string_append(g, 2, US" Q=", queue_name); |
| 1146 | |
| 1147 | #ifdef EXPERIMENTAL_SRS |
| 1148 | if(addr->prop.srs_sender) |
| 1149 | g = string_append(g, 3, US" SRS=<", addr->prop.srs_sender, US">"); |
| 1150 | #endif |
| 1151 | |
| 1152 | /* You might think that the return path must always be set for a successful |
| 1153 | delivery; indeed, I did for some time, until this statement crashed. The case |
| 1154 | when it is not set is for a delivery to /dev/null which is optimised by not |
| 1155 | being run at all. */ |
| 1156 | |
| 1157 | if (used_return_path && LOGGING(return_path_on_delivery)) |
| 1158 | g = string_append(g, 3, US" P=<", used_return_path, US">"); |
| 1159 | |
| 1160 | if (msg) |
| 1161 | g = string_append(g, 2, US" ", msg); |
| 1162 | |
| 1163 | /* For a delivery from a system filter, there may not be a router */ |
| 1164 | if (addr->router) |
| 1165 | g = string_append(g, 2, US" R=", addr->router->name); |
| 1166 | |
| 1167 | g = string_append(g, 2, US" T=", addr->transport->name); |
| 1168 | |
| 1169 | if (LOGGING(delivery_size)) |
| 1170 | g = string_fmt_append(g, " S=%d", transport_count); |
| 1171 | |
| 1172 | /* Local delivery */ |
| 1173 | |
| 1174 | if (addr->transport->info->local) |
| 1175 | { |
| 1176 | if (addr->host_list) |
| 1177 | g = string_append(g, 2, US" H=", addr->host_list->name); |
| 1178 | g = d_log_interface(g); |
| 1179 | if (addr->shadow_message) |
| 1180 | g = string_cat(g, addr->shadow_message); |
| 1181 | } |
| 1182 | |
| 1183 | /* Remote delivery */ |
| 1184 | |
| 1185 | else |
| 1186 | { |
| 1187 | if (addr->host_used) |
| 1188 | { |
| 1189 | g = d_hostlog(g, addr); |
| 1190 | if (continue_sequence > 1) |
| 1191 | g = string_catn(g, US"*", 1); |
| 1192 | |
| 1193 | #ifndef DISABLE_EVENT |
| 1194 | deliver_host_address = addr->host_used->address; |
| 1195 | deliver_host_port = addr->host_used->port; |
| 1196 | deliver_host = addr->host_used->name; |
| 1197 | |
| 1198 | /* DNS lookup status */ |
| 1199 | lookup_dnssec_authenticated = addr->host_used->dnssec==DS_YES ? US"yes" |
| 1200 | : addr->host_used->dnssec==DS_NO ? US"no" |
| 1201 | : NULL; |
| 1202 | #endif |
| 1203 | } |
| 1204 | |
| 1205 | #ifndef DISABLE_TLS |
| 1206 | g = d_tlslog(g, addr); |
| 1207 | #endif |
| 1208 | |
| 1209 | if (addr->authenticator) |
| 1210 | { |
| 1211 | g = string_append(g, 2, US" A=", addr->authenticator); |
| 1212 | if (addr->auth_id) |
| 1213 | { |
| 1214 | g = string_append(g, 2, US":", addr->auth_id); |
| 1215 | if (LOGGING(smtp_mailauth) && addr->auth_sndr) |
| 1216 | g = string_append(g, 2, US":", addr->auth_sndr); |
| 1217 | } |
| 1218 | } |
| 1219 | |
| 1220 | if (LOGGING(pipelining)) |
| 1221 | { |
| 1222 | if (testflag(addr, af_pipelining)) |
| 1223 | g = string_catn(g, US" L", 2); |
| 1224 | #ifndef DISABLE_PIPE_CONNECT |
| 1225 | if (testflag(addr, af_early_pipe)) |
| 1226 | g = string_catn(g, US"*", 1); |
| 1227 | #endif |
| 1228 | } |
| 1229 | |
| 1230 | #ifndef DISABLE_PRDR |
| 1231 | if (testflag(addr, af_prdr_used)) |
| 1232 | g = string_catn(g, US" PRDR", 5); |
| 1233 | #endif |
| 1234 | |
| 1235 | if (testflag(addr, af_chunking_used)) |
| 1236 | g = string_catn(g, US" K", 2); |
| 1237 | } |
| 1238 | |
| 1239 | /* confirmation message (SMTP (host_used) and LMTP (driver_name)) */ |
| 1240 | |
| 1241 | if ( LOGGING(smtp_confirmation) |
| 1242 | && addr->message |
| 1243 | && (addr->host_used || Ustrcmp(addr->transport->driver_name, "lmtp") == 0) |
| 1244 | ) |
| 1245 | { |
| 1246 | unsigned lim = big_buffer_size < 1024 ? big_buffer_size : 1024; |
| 1247 | uschar *p = big_buffer; |
| 1248 | uschar *ss = addr->message; |
| 1249 | *p++ = '\"'; |
| 1250 | for (int i = 0; i < lim && ss[i] != 0; i++) /* limit logged amount */ |
| 1251 | { |
| 1252 | if (ss[i] == '\"' || ss[i] == '\\') *p++ = '\\'; /* quote \ and " */ |
| 1253 | *p++ = ss[i]; |
| 1254 | } |
| 1255 | *p++ = '\"'; |
| 1256 | *p = 0; |
| 1257 | g = string_append(g, 2, US" C=", big_buffer); |
| 1258 | } |
| 1259 | |
| 1260 | /* Time on queue and actual time taken to deliver */ |
| 1261 | |
| 1262 | if (LOGGING(queue_time)) |
| 1263 | g = string_append(g, 2, US" QT=", |
| 1264 | string_timesince(&received_time)); |
| 1265 | |
| 1266 | if (LOGGING(deliver_time)) |
| 1267 | g = string_append(g, 2, US" DT=", string_timediff(&addr->delivery_time)); |
| 1268 | |
| 1269 | /* string_cat() always leaves room for the terminator. Release the |
| 1270 | store we used to build the line after writing it. */ |
| 1271 | |
| 1272 | log_write(0, flags, "%s", string_from_gstring(g)); |
| 1273 | |
| 1274 | #ifndef DISABLE_EVENT |
| 1275 | if (!msg) msg_event_raise(US"msg:delivery", addr); |
| 1276 | #endif |
| 1277 | |
| 1278 | store_reset(reset_point); |
| 1279 | return; |
| 1280 | } |
| 1281 | |
| 1282 | |
| 1283 | |
| 1284 | static void |
| 1285 | deferral_log(address_item * addr, uschar * now, |
| 1286 | int logflags, uschar * driver_name, uschar * driver_kind) |
| 1287 | { |
| 1288 | rmark reset_point = store_mark(); |
| 1289 | gstring * g = string_get(256); |
| 1290 | |
| 1291 | /* Build up the line that is used for both the message log and the main |
| 1292 | log. */ |
| 1293 | |
| 1294 | /* Create the address string for logging. Must not do this earlier, because |
| 1295 | an OK result may be changed to FAIL when a pipe returns text. */ |
| 1296 | |
| 1297 | g = string_log_address(g, addr, LOGGING(all_parents), FALSE); |
| 1298 | |
| 1299 | if (*queue_name) |
| 1300 | g = string_append(g, 2, US" Q=", queue_name); |
| 1301 | |
| 1302 | /* Either driver_name contains something and driver_kind contains |
| 1303 | " router" or " transport" (note the leading space), or driver_name is |
| 1304 | a null string and driver_kind contains "routing" without the leading |
| 1305 | space, if all routing has been deferred. When a domain has been held, |
| 1306 | so nothing has been done at all, both variables contain null strings. */ |
| 1307 | |
| 1308 | if (driver_name) |
| 1309 | { |
| 1310 | if (driver_kind[1] == 't' && addr->router) |
| 1311 | g = string_append(g, 2, US" R=", addr->router->name); |
| 1312 | g = string_fmt_append(g, " %c=%s", toupper(driver_kind[1]), driver_name); |
| 1313 | } |
| 1314 | else if (driver_kind) |
| 1315 | g = string_append(g, 2, US" ", driver_kind); |
| 1316 | |
| 1317 | g = string_fmt_append(g, " defer (%d)", addr->basic_errno); |
| 1318 | |
| 1319 | if (addr->basic_errno > 0) |
| 1320 | g = string_append(g, 2, US": ", |
| 1321 | US strerror(addr->basic_errno)); |
| 1322 | |
| 1323 | if (addr->host_used) |
| 1324 | { |
| 1325 | g = string_append(g, 5, |
| 1326 | US" H=", addr->host_used->name, |
| 1327 | US" [", addr->host_used->address, US"]"); |
| 1328 | if (LOGGING(outgoing_port)) |
| 1329 | { |
| 1330 | int port = addr->host_used->port; |
| 1331 | g = string_fmt_append(g, ":%d", port == PORT_NONE ? 25 : port); |
| 1332 | } |
| 1333 | } |
| 1334 | |
| 1335 | if (LOGGING(deliver_time)) |
| 1336 | g = string_append(g, 2, US" DT=", string_timediff(&addr->delivery_time)); |
| 1337 | |
| 1338 | if (addr->message) |
| 1339 | g = string_append(g, 2, US": ", addr->message); |
| 1340 | |
| 1341 | (void) string_from_gstring(g); |
| 1342 | |
| 1343 | /* Log the deferment in the message log, but don't clutter it |
| 1344 | up with retry-time defers after the first delivery attempt. */ |
| 1345 | |
| 1346 | if (f.deliver_firsttime || addr->basic_errno > ERRNO_RETRY_BASE) |
| 1347 | deliver_msglog("%s %s\n", now, g->s); |
| 1348 | |
| 1349 | /* Write the main log and reset the store. |
| 1350 | For errors of the type "retry time not reached" (also remotes skipped |
| 1351 | on queue run), logging is controlled by L_retry_defer. Note that this kind |
| 1352 | of error number is negative, and all the retry ones are less than any |
| 1353 | others. */ |
| 1354 | |
| 1355 | |
| 1356 | log_write(addr->basic_errno <= ERRNO_RETRY_BASE ? L_retry_defer : 0, logflags, |
| 1357 | "== %s", g->s); |
| 1358 | |
| 1359 | store_reset(reset_point); |
| 1360 | return; |
| 1361 | } |
| 1362 | |
| 1363 | |
| 1364 | |
| 1365 | static void |
| 1366 | failure_log(address_item * addr, uschar * driver_kind, uschar * now) |
| 1367 | { |
| 1368 | rmark reset_point = store_mark(); |
| 1369 | gstring * g = string_get(256); |
| 1370 | |
| 1371 | #ifndef DISABLE_EVENT |
| 1372 | /* Message failures for which we will send a DSN get their event raised |
| 1373 | later so avoid doing it here. */ |
| 1374 | |
| 1375 | if ( !addr->prop.ignore_error |
| 1376 | && !(addr->dsn_flags & (rf_dsnflags & ~rf_notify_failure)) |
| 1377 | ) |
| 1378 | msg_event_raise(US"msg:fail:delivery", addr); |
| 1379 | #endif |
| 1380 | |
| 1381 | /* Build up the log line for the message and main logs */ |
| 1382 | |
| 1383 | /* Create the address string for logging. Must not do this earlier, because |
| 1384 | an OK result may be changed to FAIL when a pipe returns text. */ |
| 1385 | |
| 1386 | g = string_log_address(g, addr, LOGGING(all_parents), FALSE); |
| 1387 | |
| 1388 | if (LOGGING(sender_on_delivery)) |
| 1389 | g = string_append(g, 3, US" F=<", sender_address, US">"); |
| 1390 | |
| 1391 | if (*queue_name) |
| 1392 | g = string_append(g, 2, US" Q=", queue_name); |
| 1393 | |
| 1394 | /* Return path may not be set if no delivery actually happened */ |
| 1395 | |
| 1396 | if (used_return_path && LOGGING(return_path_on_delivery)) |
| 1397 | g = string_append(g, 3, US" P=<", used_return_path, US">"); |
| 1398 | |
| 1399 | if (addr->router) |
| 1400 | g = string_append(g, 2, US" R=", addr->router->name); |
| 1401 | if (addr->transport) |
| 1402 | g = string_append(g, 2, US" T=", addr->transport->name); |
| 1403 | |
| 1404 | if (addr->host_used) |
| 1405 | g = d_hostlog(g, addr); |
| 1406 | |
| 1407 | #ifndef DISABLE_TLS |
| 1408 | g = d_tlslog(g, addr); |
| 1409 | #endif |
| 1410 | |
| 1411 | if (addr->basic_errno > 0) |
| 1412 | g = string_append(g, 2, US": ", US strerror(addr->basic_errno)); |
| 1413 | |
| 1414 | if (addr->message) |
| 1415 | g = string_append(g, 2, US": ", addr->message); |
| 1416 | |
| 1417 | if (LOGGING(deliver_time)) |
| 1418 | g = string_append(g, 2, US" DT=", string_timediff(&addr->delivery_time)); |
| 1419 | |
| 1420 | (void) string_from_gstring(g); |
| 1421 | |
| 1422 | /* Do the logging. For the message log, "routing failed" for those cases, |
| 1423 | just to make it clearer. */ |
| 1424 | |
| 1425 | if (driver_kind) |
| 1426 | deliver_msglog("%s %s failed for %s\n", now, driver_kind, g->s); |
| 1427 | else |
| 1428 | deliver_msglog("%s %s\n", now, g->s); |
| 1429 | |
| 1430 | log_write(0, LOG_MAIN, "** %s", g->s); |
| 1431 | |
| 1432 | store_reset(reset_point); |
| 1433 | return; |
| 1434 | } |
| 1435 | |
| 1436 | |
| 1437 | |
| 1438 | /************************************************* |
| 1439 | * Actions at the end of handling an address * |
| 1440 | *************************************************/ |
| 1441 | |
| 1442 | /* This is a function for processing a single address when all that can be done |
| 1443 | with it has been done. |
| 1444 | |
| 1445 | Arguments: |
| 1446 | addr points to the address block |
| 1447 | result the result of the delivery attempt |
| 1448 | logflags flags for log_write() (LOG_MAIN and/or LOG_PANIC) |
| 1449 | driver_type indicates which type of driver (transport, or router) was last |
| 1450 | to process the address |
| 1451 | logchar '=' or '-' for use when logging deliveries with => or -> |
| 1452 | |
| 1453 | Returns: nothing |
| 1454 | */ |
| 1455 | |
| 1456 | static void |
| 1457 | post_process_one(address_item *addr, int result, int logflags, int driver_type, |
| 1458 | int logchar) |
| 1459 | { |
| 1460 | uschar *now = tod_stamp(tod_log); |
| 1461 | uschar *driver_kind = NULL; |
| 1462 | uschar *driver_name = NULL; |
| 1463 | |
| 1464 | DEBUG(D_deliver) debug_printf("post-process %s (%d)\n", addr->address, result); |
| 1465 | |
| 1466 | /* Set up driver kind and name for logging. Disable logging if the router or |
| 1467 | transport has disabled it. */ |
| 1468 | |
| 1469 | if (driver_type == EXIM_DTYPE_TRANSPORT) |
| 1470 | { |
| 1471 | if (addr->transport) |
| 1472 | { |
| 1473 | driver_name = addr->transport->name; |
| 1474 | driver_kind = US" transport"; |
| 1475 | f.disable_logging = addr->transport->disable_logging; |
| 1476 | } |
| 1477 | else driver_kind = US"transporting"; |
| 1478 | } |
| 1479 | else if (driver_type == EXIM_DTYPE_ROUTER) |
| 1480 | { |
| 1481 | if (addr->router) |
| 1482 | { |
| 1483 | driver_name = addr->router->name; |
| 1484 | driver_kind = US" router"; |
| 1485 | f.disable_logging = addr->router->disable_logging; |
| 1486 | } |
| 1487 | else driver_kind = US"routing"; |
| 1488 | } |
| 1489 | |
| 1490 | /* If there's an error message set, ensure that it contains only printing |
| 1491 | characters - it should, but occasionally things slip in and this at least |
| 1492 | stops the log format from getting wrecked. We also scan the message for an LDAP |
| 1493 | expansion item that has a password setting, and flatten the password. This is a |
| 1494 | fudge, but I don't know a cleaner way of doing this. (If the item is badly |
| 1495 | malformed, it won't ever have gone near LDAP.) */ |
| 1496 | |
| 1497 | if (addr->message) |
| 1498 | { |
| 1499 | const uschar * s = string_printing(addr->message); |
| 1500 | |
| 1501 | /* deconst cast ok as string_printing known to have alloc'n'copied */ |
| 1502 | addr->message = expand_hide_passwords(US s); |
| 1503 | } |
| 1504 | |
| 1505 | /* If we used a transport that has one of the "return_output" options set, and |
| 1506 | if it did in fact generate some output, then for return_output we treat the |
| 1507 | message as failed if it was not already set that way, so that the output gets |
| 1508 | returned to the sender, provided there is a sender to send it to. For |
| 1509 | return_fail_output, do this only if the delivery failed. Otherwise we just |
| 1510 | unlink the file, and remove the name so that if the delivery failed, we don't |
| 1511 | try to send back an empty or unwanted file. The log_output options operate only |
| 1512 | on a non-empty file. |
| 1513 | |
| 1514 | In any case, we close the message file, because we cannot afford to leave a |
| 1515 | file-descriptor for one address while processing (maybe very many) others. */ |
| 1516 | |
| 1517 | if (addr->return_file >= 0 && addr->return_filename) |
| 1518 | { |
| 1519 | BOOL return_output = FALSE; |
| 1520 | struct stat statbuf; |
| 1521 | (void)EXIMfsync(addr->return_file); |
| 1522 | |
| 1523 | /* If there is no output, do nothing. */ |
| 1524 | |
| 1525 | if (fstat(addr->return_file, &statbuf) == 0 && statbuf.st_size > 0) |
| 1526 | { |
| 1527 | transport_instance *tb = addr->transport; |
| 1528 | |
| 1529 | /* Handle logging options */ |
| 1530 | |
| 1531 | if ( tb->log_output |
| 1532 | || result == FAIL && tb->log_fail_output |
| 1533 | || result == DEFER && tb->log_defer_output |
| 1534 | ) |
| 1535 | { |
| 1536 | uschar *s; |
| 1537 | FILE *f = Ufopen(addr->return_filename, "rb"); |
| 1538 | if (!f) |
| 1539 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to open %s to log output " |
| 1540 | "from %s transport: %s", addr->return_filename, tb->name, |
| 1541 | strerror(errno)); |
| 1542 | else |
| 1543 | if ((s = US Ufgets(big_buffer, big_buffer_size, f))) |
| 1544 | { |
| 1545 | uschar *p = big_buffer + Ustrlen(big_buffer); |
| 1546 | const uschar * sp; |
| 1547 | while (p > big_buffer && isspace(p[-1])) p--; |
| 1548 | *p = 0; |
| 1549 | sp = string_printing(big_buffer); |
| 1550 | log_write(0, LOG_MAIN, "<%s>: %s transport output: %s", |
| 1551 | addr->address, tb->name, sp); |
| 1552 | } |
| 1553 | (void)fclose(f); |
| 1554 | } |
| 1555 | |
| 1556 | /* Handle returning options, but only if there is an address to return |
| 1557 | the text to. */ |
| 1558 | |
| 1559 | if (sender_address[0] != 0 || addr->prop.errors_address) |
| 1560 | if (tb->return_output) |
| 1561 | { |
| 1562 | addr->transport_return = result = FAIL; |
| 1563 | if (addr->basic_errno == 0 && !addr->message) |
| 1564 | addr->message = US"return message generated"; |
| 1565 | return_output = TRUE; |
| 1566 | } |
| 1567 | else |
| 1568 | if (tb->return_fail_output && result == FAIL) return_output = TRUE; |
| 1569 | } |
| 1570 | |
| 1571 | /* Get rid of the file unless it might be returned, but close it in |
| 1572 | all cases. */ |
| 1573 | |
| 1574 | if (!return_output) |
| 1575 | { |
| 1576 | Uunlink(addr->return_filename); |
| 1577 | addr->return_filename = NULL; |
| 1578 | addr->return_file = -1; |
| 1579 | } |
| 1580 | |
| 1581 | (void)close(addr->return_file); |
| 1582 | } |
| 1583 | |
| 1584 | /* The success case happens only after delivery by a transport. */ |
| 1585 | |
| 1586 | if (result == OK) |
| 1587 | { |
| 1588 | addr->next = addr_succeed; |
| 1589 | addr_succeed = addr; |
| 1590 | |
| 1591 | /* Call address_done() to ensure that we don't deliver to this address again, |
| 1592 | and write appropriate things to the message log. If it is a child address, we |
| 1593 | call child_done() to scan the ancestors and mark them complete if this is the |
| 1594 | last child to complete. */ |
| 1595 | |
| 1596 | address_done(addr, now); |
| 1597 | DEBUG(D_deliver) debug_printf("%s delivered\n", addr->address); |
| 1598 | |
| 1599 | if (!addr->parent) |
| 1600 | deliver_msglog("%s %s: %s%s succeeded\n", now, addr->address, |
| 1601 | driver_name, driver_kind); |
| 1602 | else |
| 1603 | { |
| 1604 | deliver_msglog("%s %s <%s>: %s%s succeeded\n", now, addr->address, |
| 1605 | addr->parent->address, driver_name, driver_kind); |
| 1606 | child_done(addr, now); |
| 1607 | } |
| 1608 | |
| 1609 | /* Certificates for logging (via events) */ |
| 1610 | #ifndef DISABLE_TLS |
| 1611 | tls_out.ourcert = addr->ourcert; |
| 1612 | addr->ourcert = NULL; |
| 1613 | tls_out.peercert = addr->peercert; |
| 1614 | addr->peercert = NULL; |
| 1615 | |
| 1616 | tls_out.ver = addr->tlsver; |
| 1617 | tls_out.cipher = addr->cipher; |
| 1618 | tls_out.peerdn = addr->peerdn; |
| 1619 | tls_out.ocsp = addr->ocsp; |
| 1620 | # ifdef SUPPORT_DANE |
| 1621 | tls_out.dane_verified = testflag(addr, af_dane_verified); |
| 1622 | # endif |
| 1623 | #endif |
| 1624 | |
| 1625 | delivery_log(LOG_MAIN, addr, logchar, NULL); |
| 1626 | |
| 1627 | #ifndef DISABLE_TLS |
| 1628 | tls_free_cert(&tls_out.ourcert); |
| 1629 | tls_free_cert(&tls_out.peercert); |
| 1630 | tls_out.ver = NULL; |
| 1631 | tls_out.cipher = NULL; |
| 1632 | tls_out.peerdn = NULL; |
| 1633 | tls_out.ocsp = OCSP_NOT_REQ; |
| 1634 | # ifdef SUPPORT_DANE |
| 1635 | tls_out.dane_verified = FALSE; |
| 1636 | # endif |
| 1637 | #endif |
| 1638 | } |
| 1639 | |
| 1640 | |
| 1641 | /* Soft failure, or local delivery process failed; freezing may be |
| 1642 | requested. */ |
| 1643 | |
| 1644 | else if (result == DEFER || result == PANIC) |
| 1645 | { |
| 1646 | if (result == PANIC) logflags |= LOG_PANIC; |
| 1647 | |
| 1648 | /* This puts them on the chain in reverse order. Do not change this, because |
| 1649 | the code for handling retries assumes that the one with the retry |
| 1650 | information is last. */ |
| 1651 | |
| 1652 | addr->next = addr_defer; |
| 1653 | addr_defer = addr; |
| 1654 | |
| 1655 | /* The only currently implemented special action is to freeze the |
| 1656 | message. Logging of this is done later, just before the -H file is |
| 1657 | updated. */ |
| 1658 | |
| 1659 | if (addr->special_action == SPECIAL_FREEZE) |
| 1660 | { |
| 1661 | f.deliver_freeze = TRUE; |
| 1662 | deliver_frozen_at = time(NULL); |
| 1663 | update_spool = TRUE; |
| 1664 | } |
| 1665 | |
| 1666 | /* If doing a 2-stage queue run, we skip writing to either the message |
| 1667 | log or the main log for SMTP defers. */ |
| 1668 | |
| 1669 | if (!f.queue_2stage || addr->basic_errno != 0) |
| 1670 | deferral_log(addr, now, logflags, driver_name, driver_kind); |
| 1671 | } |
| 1672 | |
| 1673 | |
| 1674 | /* Hard failure. If there is an address to which an error message can be sent, |
| 1675 | put this address on the failed list. If not, put it on the deferred list and |
| 1676 | freeze the mail message for human attention. The latter action can also be |
| 1677 | explicitly requested by a router or transport. */ |
| 1678 | |
| 1679 | else |
| 1680 | { |
| 1681 | /* If this is a delivery error, or a message for which no replies are |
| 1682 | wanted, and the message's age is greater than ignore_bounce_errors_after, |
| 1683 | force the af_ignore_error flag. This will cause the address to be discarded |
| 1684 | later (with a log entry). */ |
| 1685 | |
| 1686 | if (!*sender_address && message_age >= ignore_bounce_errors_after) |
| 1687 | addr->prop.ignore_error = TRUE; |
| 1688 | |
| 1689 | /* Freeze the message if requested, or if this is a bounce message (or other |
| 1690 | message with null sender) and this address does not have its own errors |
| 1691 | address. However, don't freeze if errors are being ignored. The actual code |
| 1692 | to ignore occurs later, instead of sending a message. Logging of freezing |
| 1693 | occurs later, just before writing the -H file. */ |
| 1694 | |
| 1695 | if ( !addr->prop.ignore_error |
| 1696 | && ( addr->special_action == SPECIAL_FREEZE |
| 1697 | || (sender_address[0] == 0 && !addr->prop.errors_address) |
| 1698 | ) ) |
| 1699 | { |
| 1700 | frozen_info = addr->special_action == SPECIAL_FREEZE |
| 1701 | ? US"" |
| 1702 | : f.sender_local && !f.local_error_message |
| 1703 | ? US" (message created with -f <>)" |
| 1704 | : US" (delivery error message)"; |
| 1705 | f.deliver_freeze = TRUE; |
| 1706 | deliver_frozen_at = time(NULL); |
| 1707 | update_spool = TRUE; |
| 1708 | |
| 1709 | /* The address is put on the defer rather than the failed queue, because |
| 1710 | the message is being retained. */ |
| 1711 | |
| 1712 | addr->next = addr_defer; |
| 1713 | addr_defer = addr; |
| 1714 | } |
| 1715 | |
| 1716 | /* Don't put the address on the nonrecipients tree yet; wait until an |
| 1717 | error message has been successfully sent. */ |
| 1718 | |
| 1719 | else |
| 1720 | { |
| 1721 | addr->next = addr_failed; |
| 1722 | addr_failed = addr; |
| 1723 | } |
| 1724 | |
| 1725 | failure_log(addr, driver_name ? NULL : driver_kind, now); |
| 1726 | } |
| 1727 | |
| 1728 | /* Ensure logging is turned on again in all cases */ |
| 1729 | |
| 1730 | f.disable_logging = FALSE; |
| 1731 | } |
| 1732 | |
| 1733 | |
| 1734 | |
| 1735 | |
| 1736 | /************************************************* |
| 1737 | * Address-independent error * |
| 1738 | *************************************************/ |
| 1739 | |
| 1740 | /* This function is called when there's an error that is not dependent on a |
| 1741 | particular address, such as an expansion string failure. It puts the error into |
| 1742 | all the addresses in a batch, logs the incident on the main and panic logs, and |
| 1743 | clears the expansions. It is mostly called from local_deliver(), but can be |
| 1744 | called for a remote delivery via findugid(). |
| 1745 | |
| 1746 | Arguments: |
| 1747 | logit TRUE if (MAIN+PANIC) logging required |
| 1748 | addr the first of the chain of addresses |
| 1749 | code the error code |
| 1750 | format format string for error message, or NULL if already set in addr |
| 1751 | ... arguments for the format |
| 1752 | |
| 1753 | Returns: nothing |
| 1754 | */ |
| 1755 | |
| 1756 | static void |
| 1757 | common_error(BOOL logit, address_item *addr, int code, uschar *format, ...) |
| 1758 | { |
| 1759 | addr->basic_errno = code; |
| 1760 | |
| 1761 | if (format) |
| 1762 | { |
| 1763 | va_list ap; |
| 1764 | gstring * g; |
| 1765 | |
| 1766 | va_start(ap, format); |
| 1767 | g = string_vformat(NULL, SVFMT_EXTEND|SVFMT_REBUFFER, CS format, ap); |
| 1768 | va_end(ap); |
| 1769 | addr->message = string_from_gstring(g); |
| 1770 | } |
| 1771 | |
| 1772 | for (address_item * addr2 = addr->next; addr2; addr2 = addr2->next) |
| 1773 | { |
| 1774 | addr2->basic_errno = code; |
| 1775 | addr2->message = addr->message; |
| 1776 | } |
| 1777 | |
| 1778 | if (logit) log_write(0, LOG_MAIN|LOG_PANIC, "%s", addr->message); |
| 1779 | deliver_set_expansions(NULL); |
| 1780 | } |
| 1781 | |
| 1782 | |
| 1783 | |
| 1784 | |
| 1785 | /************************************************* |
| 1786 | * Check a "never users" list * |
| 1787 | *************************************************/ |
| 1788 | |
| 1789 | /* This function is called to check whether a uid is on one of the two "never |
| 1790 | users" lists. |
| 1791 | |
| 1792 | Arguments: |
| 1793 | uid the uid to be checked |
| 1794 | nusers the list to be scanned; the first item in the list is the count |
| 1795 | |
| 1796 | Returns: TRUE if the uid is on the list |
| 1797 | */ |
| 1798 | |
| 1799 | static BOOL |
| 1800 | check_never_users(uid_t uid, uid_t *nusers) |
| 1801 | { |
| 1802 | if (!nusers) return FALSE; |
| 1803 | for (int i = 1; i <= (int)(nusers[0]); i++) if (nusers[i] == uid) return TRUE; |
| 1804 | return FALSE; |
| 1805 | } |
| 1806 | |
| 1807 | |
| 1808 | |
| 1809 | /************************************************* |
| 1810 | * Find uid and gid for a transport * |
| 1811 | *************************************************/ |
| 1812 | |
| 1813 | /* This function is called for both local and remote deliveries, to find the |
| 1814 | uid/gid under which to run the delivery. The values are taken preferentially |
| 1815 | from the transport (either explicit or deliver_as_creator), then from the |
| 1816 | address (i.e. the router), and if nothing is set, the exim uid/gid are used. If |
| 1817 | the resulting uid is on the "never_users" or the "fixed_never_users" list, a |
| 1818 | panic error is logged, and the function fails (which normally leads to delivery |
| 1819 | deferral). |
| 1820 | |
| 1821 | Arguments: |
| 1822 | addr the address (possibly a chain) |
| 1823 | tp the transport |
| 1824 | uidp pointer to uid field |
| 1825 | gidp pointer to gid field |
| 1826 | igfp pointer to the use_initgroups field |
| 1827 | |
| 1828 | Returns: FALSE if failed - error has been set in address(es) |
| 1829 | */ |
| 1830 | |
| 1831 | static BOOL |
| 1832 | findugid(address_item *addr, transport_instance *tp, uid_t *uidp, gid_t *gidp, |
| 1833 | BOOL *igfp) |
| 1834 | { |
| 1835 | uschar *nuname; |
| 1836 | BOOL gid_set = FALSE; |
| 1837 | |
| 1838 | /* Default initgroups flag comes from the transport */ |
| 1839 | |
| 1840 | *igfp = tp->initgroups; |
| 1841 | |
| 1842 | /* First see if there's a gid on the transport, either fixed or expandable. |
| 1843 | The expanding function always logs failure itself. */ |
| 1844 | |
| 1845 | if (tp->gid_set) |
| 1846 | { |
| 1847 | *gidp = tp->gid; |
| 1848 | gid_set = TRUE; |
| 1849 | } |
| 1850 | else if (tp->expand_gid) |
| 1851 | { |
| 1852 | if (!route_find_expanded_group(tp->expand_gid, tp->name, US"transport", gidp, |
| 1853 | &(addr->message))) |
| 1854 | { |
| 1855 | common_error(FALSE, addr, ERRNO_GIDFAIL, NULL); |
| 1856 | return FALSE; |
| 1857 | } |
| 1858 | gid_set = TRUE; |
| 1859 | } |
| 1860 | |
| 1861 | /* If the transport did not set a group, see if the router did. */ |
| 1862 | |
| 1863 | if (!gid_set && testflag(addr, af_gid_set)) |
| 1864 | { |
| 1865 | *gidp = addr->gid; |
| 1866 | gid_set = TRUE; |
| 1867 | } |
| 1868 | |
| 1869 | /* Pick up a uid from the transport if one is set. */ |
| 1870 | |
| 1871 | if (tp->uid_set) *uidp = tp->uid; |
| 1872 | |
| 1873 | /* Otherwise, try for an expandable uid field. If it ends up as a numeric id, |
| 1874 | it does not provide a passwd value from which a gid can be taken. */ |
| 1875 | |
| 1876 | else if (tp->expand_uid) |
| 1877 | { |
| 1878 | struct passwd *pw; |
| 1879 | if (!route_find_expanded_user(tp->expand_uid, tp->name, US"transport", &pw, |
| 1880 | uidp, &(addr->message))) |
| 1881 | { |
| 1882 | common_error(FALSE, addr, ERRNO_UIDFAIL, NULL); |
| 1883 | return FALSE; |
| 1884 | } |
| 1885 | if (!gid_set && pw) |
| 1886 | { |
| 1887 | *gidp = pw->pw_gid; |
| 1888 | gid_set = TRUE; |
| 1889 | } |
| 1890 | } |
| 1891 | |
| 1892 | /* If the transport doesn't set the uid, test the deliver_as_creator flag. */ |
| 1893 | |
| 1894 | else if (tp->deliver_as_creator) |
| 1895 | { |
| 1896 | *uidp = originator_uid; |
| 1897 | if (!gid_set) |
| 1898 | { |
| 1899 | *gidp = originator_gid; |
| 1900 | gid_set = TRUE; |
| 1901 | } |
| 1902 | } |
| 1903 | |
| 1904 | /* Otherwise see if the address specifies the uid and if so, take it and its |
| 1905 | initgroups flag. */ |
| 1906 | |
| 1907 | else if (testflag(addr, af_uid_set)) |
| 1908 | { |
| 1909 | *uidp = addr->uid; |
| 1910 | *igfp = testflag(addr, af_initgroups); |
| 1911 | } |
| 1912 | |
| 1913 | /* Nothing has specified the uid - default to the Exim user, and group if the |
| 1914 | gid is not set. */ |
| 1915 | |
| 1916 | else |
| 1917 | { |
| 1918 | *uidp = exim_uid; |
| 1919 | if (!gid_set) |
| 1920 | { |
| 1921 | *gidp = exim_gid; |
| 1922 | gid_set = TRUE; |
| 1923 | } |
| 1924 | } |
| 1925 | |
| 1926 | /* If no gid is set, it is a disaster. We default to the Exim gid only if |
| 1927 | defaulting to the Exim uid. In other words, if the configuration has specified |
| 1928 | a uid, it must also provide a gid. */ |
| 1929 | |
| 1930 | if (!gid_set) |
| 1931 | { |
| 1932 | common_error(TRUE, addr, ERRNO_GIDFAIL, US"User set without group for " |
| 1933 | "%s transport", tp->name); |
| 1934 | return FALSE; |
| 1935 | } |
| 1936 | |
| 1937 | /* Check that the uid is not on the lists of banned uids that may not be used |
| 1938 | for delivery processes. */ |
| 1939 | |
| 1940 | nuname = check_never_users(*uidp, never_users) |
| 1941 | ? US"never_users" |
| 1942 | : check_never_users(*uidp, fixed_never_users) |
| 1943 | ? US"fixed_never_users" |
| 1944 | : NULL; |
| 1945 | if (nuname) |
| 1946 | { |
| 1947 | common_error(TRUE, addr, ERRNO_UIDFAIL, US"User %ld set for %s transport " |
| 1948 | "is on the %s list", (long int)(*uidp), tp->name, nuname); |
| 1949 | return FALSE; |
| 1950 | } |
| 1951 | |
| 1952 | /* All is well */ |
| 1953 | |
| 1954 | return TRUE; |
| 1955 | } |
| 1956 | |
| 1957 | |
| 1958 | |
| 1959 | |
| 1960 | /************************************************* |
| 1961 | * Check the size of a message for a transport * |
| 1962 | *************************************************/ |
| 1963 | |
| 1964 | /* Checks that the message isn't too big for the selected transport. |
| 1965 | This is called only when it is known that the limit is set. |
| 1966 | |
| 1967 | Arguments: |
| 1968 | tp the transport |
| 1969 | addr the (first) address being delivered |
| 1970 | |
| 1971 | Returns: OK |
| 1972 | DEFER expansion failed or did not yield an integer |
| 1973 | FAIL message too big |
| 1974 | */ |
| 1975 | |
| 1976 | int |
| 1977 | check_message_size(transport_instance *tp, address_item *addr) |
| 1978 | { |
| 1979 | int rc = OK; |
| 1980 | int size_limit; |
| 1981 | |
| 1982 | deliver_set_expansions(addr); |
| 1983 | size_limit = expand_string_integer(tp->message_size_limit, TRUE); |
| 1984 | deliver_set_expansions(NULL); |
| 1985 | |
| 1986 | if (expand_string_message) |
| 1987 | { |
| 1988 | rc = DEFER; |
| 1989 | addr->message = size_limit == -1 |
| 1990 | ? string_sprintf("failed to expand message_size_limit " |
| 1991 | "in %s transport: %s", tp->name, expand_string_message) |
| 1992 | : string_sprintf("invalid message_size_limit " |
| 1993 | "in %s transport: %s", tp->name, expand_string_message); |
| 1994 | } |
| 1995 | else if (size_limit > 0 && message_size > size_limit) |
| 1996 | { |
| 1997 | rc = FAIL; |
| 1998 | addr->message = |
| 1999 | string_sprintf("message is too big (transport limit = %d)", |
| 2000 | size_limit); |
| 2001 | } |
| 2002 | |
| 2003 | return rc; |
| 2004 | } |
| 2005 | |
| 2006 | |
| 2007 | |
| 2008 | /************************************************* |
| 2009 | * Transport-time check for a previous delivery * |
| 2010 | *************************************************/ |
| 2011 | |
| 2012 | /* Check that this base address hasn't previously been delivered to its routed |
| 2013 | transport. If it has been delivered, mark it done. The check is necessary at |
| 2014 | delivery time in order to handle homonymic addresses correctly in cases where |
| 2015 | the pattern of redirection changes between delivery attempts (so the unique |
| 2016 | fields change). Non-homonymic previous delivery is detected earlier, at routing |
| 2017 | time (which saves unnecessary routing). |
| 2018 | |
| 2019 | Arguments: |
| 2020 | addr the address item |
| 2021 | testing TRUE if testing wanted only, without side effects |
| 2022 | |
| 2023 | Returns: TRUE if previously delivered by the transport |
| 2024 | */ |
| 2025 | |
| 2026 | static BOOL |
| 2027 | previously_transported(address_item *addr, BOOL testing) |
| 2028 | { |
| 2029 | uschar * s = string_sprintf("%s/%s", |
| 2030 | addr->unique + (testflag(addr, af_homonym)? 3:0), addr->transport->name); |
| 2031 | |
| 2032 | if (tree_search(tree_nonrecipients, s) != 0) |
| 2033 | { |
| 2034 | DEBUG(D_deliver|D_route|D_transport) |
| 2035 | debug_printf("%s was previously delivered (%s transport): discarded\n", |
| 2036 | addr->address, addr->transport->name); |
| 2037 | if (!testing) child_done(addr, tod_stamp(tod_log)); |
| 2038 | return TRUE; |
| 2039 | } |
| 2040 | |
| 2041 | return FALSE; |
| 2042 | } |
| 2043 | |
| 2044 | |
| 2045 | |
| 2046 | /****************************************************** |
| 2047 | * Check for a given header in a header string * |
| 2048 | ******************************************************/ |
| 2049 | |
| 2050 | /* This function is used when generating quota warnings. The configuration may |
| 2051 | specify any header lines it likes in quota_warn_message. If certain of them are |
| 2052 | missing, defaults are inserted, so we need to be able to test for the presence |
| 2053 | of a given header. |
| 2054 | |
| 2055 | Arguments: |
| 2056 | hdr the required header name |
| 2057 | hstring the header string |
| 2058 | |
| 2059 | Returns: TRUE the header is in the string |
| 2060 | FALSE the header is not in the string |
| 2061 | */ |
| 2062 | |
| 2063 | static BOOL |
| 2064 | contains_header(uschar *hdr, uschar *hstring) |
| 2065 | { |
| 2066 | int len = Ustrlen(hdr); |
| 2067 | uschar *p = hstring; |
| 2068 | while (*p != 0) |
| 2069 | { |
| 2070 | if (strncmpic(p, hdr, len) == 0) |
| 2071 | { |
| 2072 | p += len; |
| 2073 | while (*p == ' ' || *p == '\t') p++; |
| 2074 | if (*p == ':') return TRUE; |
| 2075 | } |
| 2076 | while (*p != 0 && *p != '\n') p++; |
| 2077 | if (*p == '\n') p++; |
| 2078 | } |
| 2079 | return FALSE; |
| 2080 | } |
| 2081 | |
| 2082 | |
| 2083 | |
| 2084 | |
| 2085 | /************************************************* |
| 2086 | * Perform a local delivery * |
| 2087 | *************************************************/ |
| 2088 | |
| 2089 | /* Each local delivery is performed in a separate process which sets its |
| 2090 | uid and gid as specified. This is a safer way than simply changing and |
| 2091 | restoring using seteuid(); there is a body of opinion that seteuid() cannot be |
| 2092 | used safely. From release 4, Exim no longer makes any use of it. Besides, not |
| 2093 | all systems have seteuid(). |
| 2094 | |
| 2095 | If the uid/gid are specified in the transport_instance, they are used; the |
| 2096 | transport initialization must ensure that either both or neither are set. |
| 2097 | Otherwise, the values associated with the address are used. If neither are set, |
| 2098 | it is a configuration error. |
| 2099 | |
| 2100 | The transport or the address may specify a home directory (transport over- |
| 2101 | rides), and if they do, this is set as $home. If neither have set a working |
| 2102 | directory, this value is used for that as well. Otherwise $home is left unset |
| 2103 | and the cwd is set to "/" - a directory that should be accessible to all users. |
| 2104 | |
| 2105 | Using a separate process makes it more complicated to get error information |
| 2106 | back. We use a pipe to pass the return code and also an error code and error |
| 2107 | text string back to the parent process. |
| 2108 | |
| 2109 | Arguments: |
| 2110 | addr points to an address block for this delivery; for "normal" local |
| 2111 | deliveries this is the only address to be delivered, but for |
| 2112 | pseudo-remote deliveries (e.g. by batch SMTP to a file or pipe) |
| 2113 | a number of addresses can be handled simultaneously, and in this |
| 2114 | case addr will point to a chain of addresses with the same |
| 2115 | characteristics. |
| 2116 | |
| 2117 | shadowing TRUE if running a shadow transport; this causes output from pipes |
| 2118 | to be ignored. |
| 2119 | |
| 2120 | Returns: nothing |
| 2121 | */ |
| 2122 | |
| 2123 | static void |
| 2124 | deliver_local(address_item *addr, BOOL shadowing) |
| 2125 | { |
| 2126 | BOOL use_initgroups; |
| 2127 | uid_t uid; |
| 2128 | gid_t gid; |
| 2129 | int status, len, rc; |
| 2130 | int pfd[2]; |
| 2131 | pid_t pid; |
| 2132 | uschar *working_directory; |
| 2133 | address_item *addr2; |
| 2134 | transport_instance *tp = addr->transport; |
| 2135 | |
| 2136 | /* Set up the return path from the errors or sender address. If the transport |
| 2137 | has its own return path setting, expand it and replace the existing value. */ |
| 2138 | |
| 2139 | if(addr->prop.errors_address) |
| 2140 | return_path = addr->prop.errors_address; |
| 2141 | #ifdef EXPERIMENTAL_SRS |
| 2142 | else if (addr->prop.srs_sender) |
| 2143 | return_path = addr->prop.srs_sender; |
| 2144 | #endif |
| 2145 | else |
| 2146 | return_path = sender_address; |
| 2147 | |
| 2148 | if (tp->return_path) |
| 2149 | { |
| 2150 | uschar *new_return_path = expand_string(tp->return_path); |
| 2151 | if (!new_return_path) |
| 2152 | { |
| 2153 | if (!f.expand_string_forcedfail) |
| 2154 | { |
| 2155 | common_error(TRUE, addr, ERRNO_EXPANDFAIL, |
| 2156 | US"Failed to expand return path \"%s\" in %s transport: %s", |
| 2157 | tp->return_path, tp->name, expand_string_message); |
| 2158 | return; |
| 2159 | } |
| 2160 | } |
| 2161 | else return_path = new_return_path; |
| 2162 | } |
| 2163 | |
| 2164 | /* For local deliveries, one at a time, the value used for logging can just be |
| 2165 | set directly, once and for all. */ |
| 2166 | |
| 2167 | used_return_path = return_path; |
| 2168 | |
| 2169 | /* Sort out the uid, gid, and initgroups flag. If an error occurs, the message |
| 2170 | gets put into the address(es), and the expansions are unset, so we can just |
| 2171 | return. */ |
| 2172 | |
| 2173 | if (!findugid(addr, tp, &uid, &gid, &use_initgroups)) return; |
| 2174 | |
| 2175 | /* See if either the transport or the address specifies a home directory. A |
| 2176 | home directory set in the address may already be expanded; a flag is set to |
| 2177 | indicate that. In other cases we must expand it. */ |
| 2178 | |
| 2179 | if ( (deliver_home = tp->home_dir) /* Set in transport, or */ |
| 2180 | || ( (deliver_home = addr->home_dir) /* Set in address and */ |
| 2181 | && !testflag(addr, af_home_expanded) /* not expanded */ |
| 2182 | ) ) |
| 2183 | { |
| 2184 | uschar *rawhome = deliver_home; |
| 2185 | deliver_home = NULL; /* in case it contains $home */ |
| 2186 | if (!(deliver_home = expand_string(rawhome))) |
| 2187 | { |
| 2188 | common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"home directory \"%s\" failed " |
| 2189 | "to expand for %s transport: %s", rawhome, tp->name, |
| 2190 | expand_string_message); |
| 2191 | return; |
| 2192 | } |
| 2193 | if (*deliver_home != '/') |
| 2194 | { |
| 2195 | common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"home directory path \"%s\" " |
| 2196 | "is not absolute for %s transport", deliver_home, tp->name); |
| 2197 | return; |
| 2198 | } |
| 2199 | } |
| 2200 | |
| 2201 | /* See if either the transport or the address specifies a current directory, |
| 2202 | and if so, expand it. If nothing is set, use the home directory, unless it is |
| 2203 | also unset in which case use "/", which is assumed to be a directory to which |
| 2204 | all users have access. It is necessary to be in a visible directory for some |
| 2205 | operating systems when running pipes, as some commands (e.g. "rm" under Solaris |
| 2206 | 2.5) require this. */ |
| 2207 | |
| 2208 | working_directory = tp->current_dir ? tp->current_dir : addr->current_dir; |
| 2209 | if (working_directory) |
| 2210 | { |
| 2211 | uschar *raw = working_directory; |
| 2212 | if (!(working_directory = expand_string(raw))) |
| 2213 | { |
| 2214 | common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"current directory \"%s\" " |
| 2215 | "failed to expand for %s transport: %s", raw, tp->name, |
| 2216 | expand_string_message); |
| 2217 | return; |
| 2218 | } |
| 2219 | if (*working_directory != '/') |
| 2220 | { |
| 2221 | common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"current directory path " |
| 2222 | "\"%s\" is not absolute for %s transport", working_directory, tp->name); |
| 2223 | return; |
| 2224 | } |
| 2225 | } |
| 2226 | else working_directory = deliver_home ? deliver_home : US"/"; |
| 2227 | |
| 2228 | /* If one of the return_output flags is set on the transport, create and open a |
| 2229 | file in the message log directory for the transport to write its output onto. |
| 2230 | This is mainly used by pipe transports. The file needs to be unique to the |
| 2231 | address. This feature is not available for shadow transports. */ |
| 2232 | |
| 2233 | if ( !shadowing |
| 2234 | && ( tp->return_output || tp->return_fail_output |
| 2235 | || tp->log_output || tp->log_fail_output || tp->log_defer_output |
| 2236 | ) ) |
| 2237 | { |
| 2238 | uschar * error; |
| 2239 | |
| 2240 | addr->return_filename = |
| 2241 | spool_fname(US"msglog", message_subdir, message_id, |
| 2242 | string_sprintf("-%d-%d", getpid(), return_count++)); |
| 2243 | |
| 2244 | if ((addr->return_file = open_msglog_file(addr->return_filename, 0400, &error)) < 0) |
| 2245 | { |
| 2246 | common_error(TRUE, addr, errno, US"Unable to %s file for %s transport " |
| 2247 | "to return message: %s", error, tp->name, strerror(errno)); |
| 2248 | return; |
| 2249 | } |
| 2250 | } |
| 2251 | |
| 2252 | /* Create the pipe for inter-process communication. */ |
| 2253 | |
| 2254 | if (pipe(pfd) != 0) |
| 2255 | { |
| 2256 | common_error(TRUE, addr, ERRNO_PIPEFAIL, US"Creation of pipe failed: %s", |
| 2257 | strerror(errno)); |
| 2258 | return; |
| 2259 | } |
| 2260 | |
| 2261 | /* Now fork the process to do the real work in the subprocess, but first |
| 2262 | ensure that all cached resources are freed so that the subprocess starts with |
| 2263 | a clean slate and doesn't interfere with the parent process. */ |
| 2264 | |
| 2265 | search_tidyup(); |
| 2266 | |
| 2267 | if ((pid = fork()) == 0) |
| 2268 | { |
| 2269 | BOOL replicate = TRUE; |
| 2270 | |
| 2271 | /* Prevent core dumps, as we don't want them in users' home directories. |
| 2272 | HP-UX doesn't have RLIMIT_CORE; I don't know how to do this in that |
| 2273 | system. Some experimental/developing systems (e.g. GNU/Hurd) may define |
| 2274 | RLIMIT_CORE but not support it in setrlimit(). For such systems, do not |
| 2275 | complain if the error is "not supported". |
| 2276 | |
| 2277 | There are two scenarios where changing the max limit has an effect. In one, |
| 2278 | the user is using a .forward and invoking a command of their choice via pipe; |
| 2279 | for these, we do need the max limit to be 0 unless the admin chooses to |
| 2280 | permit an increased limit. In the other, the command is invoked directly by |
| 2281 | the transport and is under administrator control, thus being able to raise |
| 2282 | the limit aids in debugging. So there's no general always-right answer. |
| 2283 | |
| 2284 | Thus we inhibit core-dumps completely but let individual transports, while |
| 2285 | still root, re-raise the limits back up to aid debugging. We make the |
| 2286 | default be no core-dumps -- few enough people can use core dumps in |
| 2287 | diagnosis that it's reasonable to make them something that has to be explicitly requested. |
| 2288 | */ |
| 2289 | |
| 2290 | #ifdef RLIMIT_CORE |
| 2291 | struct rlimit rl; |
| 2292 | rl.rlim_cur = 0; |
| 2293 | rl.rlim_max = 0; |
| 2294 | if (setrlimit(RLIMIT_CORE, &rl) < 0) |
| 2295 | { |
| 2296 | # ifdef SETRLIMIT_NOT_SUPPORTED |
| 2297 | if (errno != ENOSYS && errno != ENOTSUP) |
| 2298 | # endif |
| 2299 | log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_CORE) failed: %s", |
| 2300 | strerror(errno)); |
| 2301 | } |
| 2302 | #endif |
| 2303 | |
| 2304 | /* Reset the random number generator, so different processes don't all |
| 2305 | have the same sequence. */ |
| 2306 | |
| 2307 | random_seed = 0; |
| 2308 | |
| 2309 | /* If the transport has a setup entry, call this first, while still |
| 2310 | privileged. (Appendfile uses this to expand quota, for example, while |
| 2311 | able to read private files.) */ |
| 2312 | |
| 2313 | if (addr->transport->setup) |
| 2314 | switch((addr->transport->setup)(addr->transport, addr, NULL, uid, gid, |
| 2315 | &(addr->message))) |
| 2316 | { |
| 2317 | case DEFER: |
| 2318 | addr->transport_return = DEFER; |
| 2319 | goto PASS_BACK; |
| 2320 | |
| 2321 | case FAIL: |
| 2322 | addr->transport_return = PANIC; |
| 2323 | goto PASS_BACK; |
| 2324 | } |
| 2325 | |
| 2326 | /* Ignore SIGINT and SIGTERM during delivery. Also ignore SIGUSR1, as |
| 2327 | when the process becomes unprivileged, it won't be able to write to the |
| 2328 | process log. SIGHUP is ignored throughout exim, except when it is being |
| 2329 | run as a daemon. */ |
| 2330 | |
| 2331 | signal(SIGINT, SIG_IGN); |
| 2332 | signal(SIGTERM, SIG_IGN); |
| 2333 | signal(SIGUSR1, SIG_IGN); |
| 2334 | |
| 2335 | /* Close the unwanted half of the pipe, and set close-on-exec for the other |
| 2336 | half - for transports that exec things (e.g. pipe). Then set the required |
| 2337 | gid/uid. */ |
| 2338 | |
| 2339 | (void)close(pfd[pipe_read]); |
| 2340 | (void)fcntl(pfd[pipe_write], F_SETFD, fcntl(pfd[pipe_write], F_GETFD) | |
| 2341 | FD_CLOEXEC); |
| 2342 | exim_setugid(uid, gid, use_initgroups, |
| 2343 | string_sprintf("local delivery to %s <%s> transport=%s", addr->local_part, |
| 2344 | addr->address, addr->transport->name)); |
| 2345 | |
| 2346 | DEBUG(D_deliver) |
| 2347 | { |
| 2348 | debug_printf(" home=%s current=%s\n", deliver_home, working_directory); |
| 2349 | for (address_item * batched = addr->next; batched; batched = batched->next) |
| 2350 | debug_printf("additional batched address: %s\n", batched->address); |
| 2351 | } |
| 2352 | |
| 2353 | /* Set an appropriate working directory. */ |
| 2354 | |
| 2355 | if (Uchdir(working_directory) < 0) |
| 2356 | { |
| 2357 | addr->transport_return = DEFER; |
| 2358 | addr->basic_errno = errno; |
| 2359 | addr->message = string_sprintf("failed to chdir to %s", working_directory); |
| 2360 | } |
| 2361 | |
| 2362 | /* If successful, call the transport */ |
| 2363 | |
| 2364 | else |
| 2365 | { |
| 2366 | BOOL ok = TRUE; |
| 2367 | set_process_info("delivering %s to %s using %s", message_id, |
| 2368 | addr->local_part, addr->transport->name); |
| 2369 | |
| 2370 | /* Setting this global in the subprocess means we need never clear it */ |
| 2371 | transport_name = addr->transport->name; |
| 2372 | |
| 2373 | /* If a transport filter has been specified, set up its argument list. |
| 2374 | Any errors will get put into the address, and FALSE yielded. */ |
| 2375 | |
| 2376 | if (addr->transport->filter_command) |
| 2377 | { |
| 2378 | ok = transport_set_up_command(&transport_filter_argv, |
| 2379 | addr->transport->filter_command, |
| 2380 | TRUE, PANIC, addr, US"transport filter", NULL); |
| 2381 | transport_filter_timeout = addr->transport->filter_timeout; |
| 2382 | } |
| 2383 | else transport_filter_argv = NULL; |
| 2384 | |
| 2385 | if (ok) |
| 2386 | { |
| 2387 | debug_print_string(addr->transport->debug_string); |
| 2388 | replicate = !(addr->transport->info->code)(addr->transport, addr); |
| 2389 | } |
| 2390 | } |
| 2391 | |
| 2392 | /* Pass the results back down the pipe. If necessary, first replicate the |
| 2393 | status in the top address to the others in the batch. The label is the |
| 2394 | subject of a goto when a call to the transport's setup function fails. We |
| 2395 | pass the pointer to the transport back in case it got changed as a result of |
| 2396 | file_format in appendfile. */ |
| 2397 | |
| 2398 | PASS_BACK: |
| 2399 | |
| 2400 | if (replicate) replicate_status(addr); |
| 2401 | for (addr2 = addr; addr2; addr2 = addr2->next) |
| 2402 | { |
| 2403 | int i; |
| 2404 | int local_part_length = Ustrlen(addr2->local_part); |
| 2405 | uschar *s; |
| 2406 | int ret; |
| 2407 | |
| 2408 | if( (ret = write(pfd[pipe_write], &addr2->transport_return, sizeof(int))) != sizeof(int) |
| 2409 | || (ret = write(pfd[pipe_write], &transport_count, sizeof(transport_count))) != sizeof(transport_count) |
| 2410 | || (ret = write(pfd[pipe_write], &addr2->flags, sizeof(addr2->flags))) != sizeof(addr2->flags) |
| 2411 | || (ret = write(pfd[pipe_write], &addr2->basic_errno, sizeof(int))) != sizeof(int) |
| 2412 | || (ret = write(pfd[pipe_write], &addr2->more_errno, sizeof(int))) != sizeof(int) |
| 2413 | || (ret = write(pfd[pipe_write], &addr2->delivery_time, sizeof(struct timeval))) != sizeof(struct timeval) |
| 2414 | || (ret = write(pfd[pipe_write], &addr2->special_action, sizeof(int))) != sizeof(int) |
| 2415 | || (ret = write(pfd[pipe_write], &addr2->transport, |
| 2416 | sizeof(transport_instance *))) != sizeof(transport_instance *) |
| 2417 | |
| 2418 | /* For a file delivery, pass back the local part, in case the original |
| 2419 | was only part of the final delivery path. This gives more complete |
| 2420 | logging. */ |
| 2421 | |
| 2422 | || (testflag(addr2, af_file) |
| 2423 | && ( (ret = write(pfd[pipe_write], &local_part_length, sizeof(int))) != sizeof(int) |
| 2424 | || (ret = write(pfd[pipe_write], addr2->local_part, local_part_length)) != local_part_length |
| 2425 | ) |
| 2426 | ) |
| 2427 | ) |
| 2428 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s", |
| 2429 | ret == -1 ? strerror(errno) : "short write"); |
| 2430 | |
| 2431 | /* Now any messages */ |
| 2432 | |
| 2433 | for (i = 0, s = addr2->message; i < 2; i++, s = addr2->user_message) |
| 2434 | { |
| 2435 | int message_length = s ? Ustrlen(s) + 1 : 0; |
| 2436 | if( (ret = write(pfd[pipe_write], &message_length, sizeof(int))) != sizeof(int) |
| 2437 | || message_length > 0 && (ret = write(pfd[pipe_write], s, message_length)) != message_length |
| 2438 | ) |
| 2439 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s", |
| 2440 | ret == -1 ? strerror(errno) : "short write"); |
| 2441 | } |
| 2442 | } |
| 2443 | |
| 2444 | /* OK, this process is now done. Free any cached resources that it opened, |
| 2445 | and close the pipe we were writing down before exiting. */ |
| 2446 | |
| 2447 | (void)close(pfd[pipe_write]); |
| 2448 | search_tidyup(); |
| 2449 | exit(EXIT_SUCCESS); |
| 2450 | } |
| 2451 | |
| 2452 | /* Back in the main process: panic if the fork did not succeed. This seems |
| 2453 | better than returning an error - if forking is failing it is probably best |
| 2454 | not to try other deliveries for this message. */ |
| 2455 | |
| 2456 | if (pid < 0) |
| 2457 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Fork failed for local delivery to %s", |
| 2458 | addr->address); |
| 2459 | |
| 2460 | /* Read the pipe to get the delivery status codes and error messages. Our copy |
| 2461 | of the writing end must be closed first, as otherwise read() won't return zero |
| 2462 | on an empty pipe. We check that a status exists for each address before |
| 2463 | overwriting the address structure. If data is missing, the default DEFER status |
| 2464 | will remain. Afterwards, close the reading end. */ |
| 2465 | |
| 2466 | (void)close(pfd[pipe_write]); |
| 2467 | |
| 2468 | for (addr2 = addr; addr2; addr2 = addr2->next) |
| 2469 | { |
| 2470 | if ((len = read(pfd[pipe_read], &status, sizeof(int))) > 0) |
| 2471 | { |
| 2472 | int i; |
| 2473 | uschar **sptr; |
| 2474 | |
| 2475 | addr2->transport_return = status; |
| 2476 | len = read(pfd[pipe_read], &transport_count, |
| 2477 | sizeof(transport_count)); |
| 2478 | len = read(pfd[pipe_read], &addr2->flags, sizeof(addr2->flags)); |
| 2479 | len = read(pfd[pipe_read], &addr2->basic_errno, sizeof(int)); |
| 2480 | len = read(pfd[pipe_read], &addr2->more_errno, sizeof(int)); |
| 2481 | len = read(pfd[pipe_read], &addr2->delivery_time, sizeof(struct timeval)); |
| 2482 | len = read(pfd[pipe_read], &addr2->special_action, sizeof(int)); |
| 2483 | len = read(pfd[pipe_read], &addr2->transport, |
| 2484 | sizeof(transport_instance *)); |
| 2485 | |
| 2486 | if (testflag(addr2, af_file)) |
| 2487 | { |
| 2488 | int llen; |
| 2489 | if ( read(pfd[pipe_read], &llen, sizeof(int)) != sizeof(int) |
| 2490 | || llen > 64*4 /* limit from rfc 5821, times I18N factor */ |
| 2491 | ) |
| 2492 | { |
| 2493 | log_write(0, LOG_MAIN|LOG_PANIC, "bad local_part length read" |
| 2494 | " from delivery subprocess"); |
| 2495 | break; |
| 2496 | } |
| 2497 | /* sanity-checked llen so disable the Coverity error */ |
| 2498 | /* coverity[tainted_data] */ |
| 2499 | if (read(pfd[pipe_read], big_buffer, llen) != llen) |
| 2500 | { |
| 2501 | log_write(0, LOG_MAIN|LOG_PANIC, "bad local_part read" |
| 2502 | " from delivery subprocess"); |
| 2503 | break; |
| 2504 | } |
| 2505 | big_buffer[llen] = 0; |
| 2506 | addr2->local_part = string_copy(big_buffer); |
| 2507 | } |
| 2508 | |
| 2509 | for (i = 0, sptr = &addr2->message; i < 2; i++, sptr = &addr2->user_message) |
| 2510 | { |
| 2511 | int message_length; |
| 2512 | len = read(pfd[pipe_read], &message_length, sizeof(int)); |
| 2513 | if (message_length > 0) |
| 2514 | { |
| 2515 | len = read(pfd[pipe_read], big_buffer, message_length); |
| 2516 | big_buffer[big_buffer_size-1] = '\0'; /* guard byte */ |
| 2517 | if (len > 0) *sptr = string_copy(big_buffer); |
| 2518 | } |
| 2519 | } |
| 2520 | } |
| 2521 | |
| 2522 | else |
| 2523 | { |
| 2524 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to read delivery status for %s " |
| 2525 | "from delivery subprocess", addr2->unique); |
| 2526 | break; |
| 2527 | } |
| 2528 | } |
| 2529 | |
| 2530 | (void)close(pfd[pipe_read]); |
| 2531 | |
| 2532 | /* Unless shadowing, write all successful addresses immediately to the journal |
| 2533 | file, to ensure they are recorded asap. For homonymic addresses, use the base |
| 2534 | address plus the transport name. Failure to write the journal is panic-worthy, |
| 2535 | but don't stop, as it may prove possible subsequently to update the spool file |
| 2536 | in order to record the delivery. */ |
| 2537 | |
| 2538 | if (!shadowing) |
| 2539 | { |
| 2540 | for (addr2 = addr; addr2; addr2 = addr2->next) |
| 2541 | if (addr2->transport_return == OK) |
| 2542 | { |
| 2543 | if (testflag(addr2, af_homonym)) |
| 2544 | sprintf(CS big_buffer, "%.500s/%s\n", addr2->unique + 3, tp->name); |
| 2545 | else |
| 2546 | sprintf(CS big_buffer, "%.500s\n", addr2->unique); |
| 2547 | |
| 2548 | /* In the test harness, wait just a bit to let the subprocess finish off |
| 2549 | any debug output etc first. */ |
| 2550 | |
| 2551 | testharness_pause_ms(300); |
| 2552 | |
| 2553 | DEBUG(D_deliver) debug_printf("journalling %s", big_buffer); |
| 2554 | len = Ustrlen(big_buffer); |
| 2555 | if (write(journal_fd, big_buffer, len) != len) |
| 2556 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to update journal for %s: %s", |
| 2557 | big_buffer, strerror(errno)); |
| 2558 | } |
| 2559 | |
| 2560 | /* Ensure the journal file is pushed out to disk. */ |
| 2561 | |
| 2562 | if (EXIMfsync(journal_fd) < 0) |
| 2563 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s", |
| 2564 | strerror(errno)); |
| 2565 | } |
| 2566 | |
| 2567 | /* Wait for the process to finish. If it terminates with a non-zero code, |
| 2568 | freeze the message (except for SIGTERM, SIGKILL and SIGQUIT), but leave the |
| 2569 | status values of all the addresses as they are. Take care to handle the case |
| 2570 | when the subprocess doesn't seem to exist. This has been seen on one system |
| 2571 | when Exim was called from an MUA that set SIGCHLD to SIG_IGN. When that |
| 2572 | happens, wait() doesn't recognize the termination of child processes. Exim now |
| 2573 | resets SIGCHLD to SIG_DFL, but this code should still be robust. */ |
| 2574 | |
| 2575 | while ((rc = wait(&status)) != pid) |
| 2576 | if (rc < 0 && errno == ECHILD) /* Process has vanished */ |
| 2577 | { |
| 2578 | log_write(0, LOG_MAIN, "%s transport process vanished unexpectedly", |
| 2579 | addr->transport->driver_name); |
| 2580 | status = 0; |
| 2581 | break; |
| 2582 | } |
| 2583 | |
| 2584 | if ((status & 0xffff) != 0) |
| 2585 | { |
| 2586 | int msb = (status >> 8) & 255; |
| 2587 | int lsb = status & 255; |
| 2588 | int code = (msb == 0)? (lsb & 0x7f) : msb; |
| 2589 | if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT)) |
| 2590 | addr->special_action = SPECIAL_FREEZE; |
| 2591 | log_write(0, LOG_MAIN|LOG_PANIC, "%s transport process returned non-zero " |
| 2592 | "status 0x%04x: %s %d", |
| 2593 | addr->transport->driver_name, |
| 2594 | status, |
| 2595 | msb == 0 ? "terminated by signal" : "exit code", |
| 2596 | code); |
| 2597 | } |
| 2598 | |
| 2599 | /* If SPECIAL_WARN is set in the top address, send a warning message. */ |
| 2600 | |
| 2601 | if (addr->special_action == SPECIAL_WARN && addr->transport->warn_message) |
| 2602 | { |
| 2603 | int fd; |
| 2604 | uschar *warn_message; |
| 2605 | pid_t pid; |
| 2606 | |
| 2607 | DEBUG(D_deliver) debug_printf("Warning message requested by transport\n"); |
| 2608 | |
| 2609 | if (!(warn_message = expand_string(addr->transport->warn_message))) |
| 2610 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand \"%s\" (warning " |
| 2611 | "message for %s transport): %s", addr->transport->warn_message, |
| 2612 | addr->transport->name, expand_string_message); |
| 2613 | |
| 2614 | else if ((pid = child_open_exim(&fd)) > 0) |
| 2615 | { |
| 2616 | FILE *f = fdopen(fd, "wb"); |
| 2617 | if (errors_reply_to && !contains_header(US"Reply-To", warn_message)) |
| 2618 | fprintf(f, "Reply-To: %s\n", errors_reply_to); |
| 2619 | fprintf(f, "Auto-Submitted: auto-replied\n"); |
| 2620 | if (!contains_header(US"From", warn_message)) |
| 2621 | moan_write_from(f); |
| 2622 | fprintf(f, "%s", CS warn_message); |
| 2623 | |
| 2624 | /* Close and wait for child process to complete, without a timeout. */ |
| 2625 | |
| 2626 | (void)fclose(f); |
| 2627 | (void)child_close(pid, 0); |
| 2628 | } |
| 2629 | |
| 2630 | addr->special_action = SPECIAL_NONE; |
| 2631 | } |
| 2632 | } |
| 2633 | |
| 2634 | |
| 2635 | |
| 2636 | |
| 2637 | /* Check transport for the given concurrency limit. Return TRUE if over |
| 2638 | the limit (or an expansion failure), else FALSE and if there was a limit, |
| 2639 | the key for the hints database used for the concurrency count. */ |
| 2640 | |
| 2641 | static BOOL |
| 2642 | tpt_parallel_check(transport_instance * tp, address_item * addr, uschar ** key) |
| 2643 | { |
| 2644 | unsigned max_parallel; |
| 2645 | |
| 2646 | if (!tp->max_parallel) return FALSE; |
| 2647 | |
| 2648 | max_parallel = (unsigned) expand_string_integer(tp->max_parallel, TRUE); |
| 2649 | if (expand_string_message) |
| 2650 | { |
| 2651 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand max_parallel option " |
| 2652 | "in %s transport (%s): %s", tp->name, addr->address, |
| 2653 | expand_string_message); |
| 2654 | return TRUE; |
| 2655 | } |
| 2656 | |
| 2657 | if (max_parallel > 0) |
| 2658 | { |
| 2659 | uschar * serialize_key = string_sprintf("tpt-serialize-%s", tp->name); |
| 2660 | if (!enq_start(serialize_key, max_parallel)) |
| 2661 | { |
| 2662 | address_item * next; |
| 2663 | DEBUG(D_transport) |
| 2664 | debug_printf("skipping tpt %s because concurrency limit %u reached\n", |
| 2665 | tp->name, max_parallel); |
| 2666 | do |
| 2667 | { |
| 2668 | next = addr->next; |
| 2669 | addr->message = US"concurrency limit reached for transport"; |
| 2670 | addr->basic_errno = ERRNO_TRETRY; |
| 2671 | post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_TRANSPORT, 0); |
| 2672 | } while ((addr = next)); |
| 2673 | return TRUE; |
| 2674 | } |
| 2675 | *key = serialize_key; |
| 2676 | } |
| 2677 | return FALSE; |
| 2678 | } |
| 2679 | |
| 2680 | |
| 2681 | |
| 2682 | /************************************************* |
| 2683 | * Do local deliveries * |
| 2684 | *************************************************/ |
| 2685 | |
| 2686 | /* This function processes the list of addresses in addr_local. True local |
| 2687 | deliveries are always done one address at a time. However, local deliveries can |
| 2688 | be batched up in some cases. Typically this is when writing batched SMTP output |
| 2689 | files for use by some external transport mechanism, or when running local |
| 2690 | deliveries over LMTP. |
| 2691 | |
| 2692 | Arguments: None |
| 2693 | Returns: Nothing |
| 2694 | */ |
| 2695 | |
| 2696 | static void |
| 2697 | do_local_deliveries(void) |
| 2698 | { |
| 2699 | open_db dbblock; |
| 2700 | open_db *dbm_file = NULL; |
| 2701 | time_t now = time(NULL); |
| 2702 | |
| 2703 | /* Loop until we have exhausted the supply of local deliveries */ |
| 2704 | |
| 2705 | while (addr_local) |
| 2706 | { |
| 2707 | struct timeval delivery_start; |
| 2708 | struct timeval deliver_time; |
| 2709 | address_item *addr2, *addr3, *nextaddr; |
| 2710 | int logflags = LOG_MAIN; |
| 2711 | int logchar = f.dont_deliver? '*' : '='; |
| 2712 | transport_instance *tp; |
| 2713 | uschar * serialize_key = NULL; |
| 2714 | |
| 2715 | /* Pick the first undelivered address off the chain */ |
| 2716 | |
| 2717 | address_item *addr = addr_local; |
| 2718 | addr_local = addr->next; |
| 2719 | addr->next = NULL; |
| 2720 | |
| 2721 | DEBUG(D_deliver|D_transport) |
| 2722 | debug_printf("--------> %s <--------\n", addr->address); |
| 2723 | |
| 2724 | /* An internal disaster if there is no transport. Should not occur! */ |
| 2725 | |
| 2726 | if (!(tp = addr->transport)) |
| 2727 | { |
| 2728 | logflags |= LOG_PANIC; |
| 2729 | f.disable_logging = FALSE; /* Jic */ |
| 2730 | addr->message = addr->router |
| 2731 | ? string_sprintf("No transport set by %s router", addr->router->name) |
| 2732 | : US"No transport set by system filter"; |
| 2733 | post_process_one(addr, DEFER, logflags, EXIM_DTYPE_TRANSPORT, 0); |
| 2734 | continue; |
| 2735 | } |
| 2736 | |
| 2737 | /* Check that this base address hasn't previously been delivered to this |
| 2738 | transport. The check is necessary at this point to handle homonymic addresses |
| 2739 | correctly in cases where the pattern of redirection changes between delivery |
| 2740 | attempts. Non-homonymic previous delivery is detected earlier, at routing |
| 2741 | time. */ |
| 2742 | |
| 2743 | if (previously_transported(addr, FALSE)) continue; |
| 2744 | |
| 2745 | /* There are weird cases where logging is disabled */ |
| 2746 | |
| 2747 | f.disable_logging = tp->disable_logging; |
| 2748 | |
| 2749 | /* Check for batched addresses and possible amalgamation. Skip all the work |
| 2750 | if either batch_max <= 1 or there aren't any other addresses for local |
| 2751 | delivery. */ |
| 2752 | |
| 2753 | if (tp->batch_max > 1 && addr_local) |
| 2754 | { |
| 2755 | int batch_count = 1; |
| 2756 | BOOL uses_dom = readconf_depends((driver_instance *)tp, US"domain"); |
| 2757 | BOOL uses_lp = ( testflag(addr, af_pfr) |
| 2758 | && (testflag(addr, af_file) || addr->local_part[0] == '|') |
| 2759 | ) |
| 2760 | || readconf_depends((driver_instance *)tp, US"local_part"); |
| 2761 | uschar *batch_id = NULL; |
| 2762 | address_item **anchor = &addr_local; |
| 2763 | address_item *last = addr; |
| 2764 | address_item *next; |
| 2765 | |
| 2766 | /* Expand the batch_id string for comparison with other addresses. |
| 2767 | Expansion failure suppresses batching. */ |
| 2768 | |
| 2769 | if (tp->batch_id) |
| 2770 | { |
| 2771 | deliver_set_expansions(addr); |
| 2772 | batch_id = expand_string(tp->batch_id); |
| 2773 | deliver_set_expansions(NULL); |
| 2774 | if (!batch_id) |
| 2775 | { |
| 2776 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option " |
| 2777 | "in %s transport (%s): %s", tp->name, addr->address, |
| 2778 | expand_string_message); |
| 2779 | batch_count = tp->batch_max; |
| 2780 | } |
| 2781 | } |
| 2782 | |
| 2783 | /* Until we reach the batch_max limit, pick off addresses which have the |
| 2784 | same characteristics. These are: |
| 2785 | |
| 2786 | same transport |
| 2787 | not previously delivered (see comment about 50 lines above) |
| 2788 | same local part if the transport's configuration contains $local_part |
| 2789 | or if this is a file or pipe delivery from a redirection |
| 2790 | same domain if the transport's configuration contains $domain |
| 2791 | same errors address |
| 2792 | same additional headers |
| 2793 | same headers to be removed |
| 2794 | same uid/gid for running the transport |
| 2795 | same first host if a host list is set |
| 2796 | */ |
| 2797 | |
| 2798 | while ((next = *anchor) && batch_count < tp->batch_max) |
| 2799 | { |
| 2800 | BOOL ok = |
| 2801 | tp == next->transport |
| 2802 | && !previously_transported(next, TRUE) |
| 2803 | && testflag(addr, af_pfr) == testflag(next, af_pfr) |
| 2804 | && testflag(addr, af_file) == testflag(next, af_file) |
| 2805 | && (!uses_lp || Ustrcmp(next->local_part, addr->local_part) == 0) |
| 2806 | && (!uses_dom || Ustrcmp(next->domain, addr->domain) == 0) |
| 2807 | && same_strings(next->prop.errors_address, addr->prop.errors_address) |
| 2808 | && same_headers(next->prop.extra_headers, addr->prop.extra_headers) |
| 2809 | && same_strings(next->prop.remove_headers, addr->prop.remove_headers) |
| 2810 | && same_ugid(tp, addr, next) |
| 2811 | && ( !addr->host_list && !next->host_list |
| 2812 | || addr->host_list |
| 2813 | && next->host_list |
| 2814 | && Ustrcmp(addr->host_list->name, next->host_list->name) == 0 |
| 2815 | ); |
| 2816 | |
| 2817 | /* If the transport has a batch_id setting, batch_id will be non-NULL |
| 2818 | from the expansion outside the loop. Expand for this address and compare. |
| 2819 | Expansion failure makes this address ineligible for batching. */ |
| 2820 | |
| 2821 | if (ok && batch_id) |
| 2822 | { |
| 2823 | uschar *bid; |
| 2824 | address_item *save_nextnext = next->next; |
| 2825 | next->next = NULL; /* Expansion for a single address */ |
| 2826 | deliver_set_expansions(next); |
| 2827 | next->next = save_nextnext; |
| 2828 | bid = expand_string(tp->batch_id); |
| 2829 | deliver_set_expansions(NULL); |
| 2830 | if (!bid) |
| 2831 | { |
| 2832 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option " |
| 2833 | "in %s transport (%s): %s", tp->name, next->address, |
| 2834 | expand_string_message); |
| 2835 | ok = FALSE; |
| 2836 | } |
| 2837 | else ok = (Ustrcmp(batch_id, bid) == 0); |
| 2838 | } |
| 2839 | |
| 2840 | /* Take address into batch if OK. */ |
| 2841 | |
| 2842 | if (ok) |
| 2843 | { |
| 2844 | *anchor = next->next; /* Include the address */ |
| 2845 | next->next = NULL; |
| 2846 | last->next = next; |
| 2847 | last = next; |
| 2848 | batch_count++; |
| 2849 | } |
| 2850 | else anchor = &next->next; /* Skip the address */ |
| 2851 | } |
| 2852 | } |
| 2853 | |
| 2854 | /* We now have one or more addresses that can be delivered in a batch. Check |
| 2855 | whether the transport is prepared to accept a message of this size. If not, |
| 2856 | fail them all forthwith. If the expansion fails, or does not yield an |
| 2857 | integer, defer delivery. */ |
| 2858 | |
| 2859 | if (tp->message_size_limit) |
| 2860 | { |
| 2861 | int rc = check_message_size(tp, addr); |
| 2862 | if (rc != OK) |
| 2863 | { |
| 2864 | replicate_status(addr); |
| 2865 | while (addr) |
| 2866 | { |
| 2867 | addr2 = addr->next; |
| 2868 | post_process_one(addr, rc, logflags, EXIM_DTYPE_TRANSPORT, 0); |
| 2869 | addr = addr2; |
| 2870 | } |
| 2871 | continue; /* With next batch of addresses */ |
| 2872 | } |
| 2873 | } |
| 2874 | |
| 2875 | /* If we are not running the queue, or if forcing, all deliveries will be |
| 2876 | attempted. Otherwise, we must respect the retry times for each address. Even |
| 2877 | when not doing this, we need to set up the retry key string, and determine |
| 2878 | whether a retry record exists, because after a successful delivery, a delete |
| 2879 | retry item must be set up. Keep the retry database open only for the duration |
| 2880 | of these checks, rather than for all local deliveries, because some local |
| 2881 | deliveries (e.g. to pipes) can take a substantial time. */ |
| 2882 | |
| 2883 | if (!(dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE, TRUE))) |
| 2884 | { |
| 2885 | DEBUG(D_deliver|D_retry|D_hints_lookup) |
| 2886 | debug_printf("no retry data available\n"); |
| 2887 | } |
| 2888 | |
| 2889 | addr2 = addr; |
| 2890 | addr3 = NULL; |
| 2891 | while (addr2) |
| 2892 | { |
| 2893 | BOOL ok = TRUE; /* to deliver this address */ |
| 2894 | uschar *retry_key; |
| 2895 | |
| 2896 | /* Set up the retry key to include the domain or not, and change its |
| 2897 | leading character from "R" to "T". Must make a copy before doing this, |
| 2898 | because the old key may be pointed to from a "delete" retry item after |
| 2899 | a routing delay. */ |
| 2900 | |
| 2901 | retry_key = string_copy( |
| 2902 | tp->retry_use_local_part ? addr2->address_retry_key : |
| 2903 | addr2->domain_retry_key); |
| 2904 | *retry_key = 'T'; |
| 2905 | |
| 2906 | /* Inspect the retry data. If there is no hints file, delivery happens. */ |
| 2907 | |
| 2908 | if (dbm_file) |
| 2909 | { |
| 2910 | dbdata_retry *retry_record = dbfn_read(dbm_file, retry_key); |
| 2911 | |
| 2912 | /* If there is no retry record, delivery happens. If there is, |
| 2913 | remember it exists so it can be deleted after a successful delivery. */ |
| 2914 | |
| 2915 | if (retry_record) |
| 2916 | { |
| 2917 | setflag(addr2, af_lt_retry_exists); |
| 2918 | |
| 2919 | /* A retry record exists for this address. If queue running and not |
| 2920 | forcing, inspect its contents. If the record is too old, or if its |
| 2921 | retry time has come, or if it has passed its cutoff time, delivery |
| 2922 | will go ahead. */ |
| 2923 | |
| 2924 | DEBUG(D_retry) |
| 2925 | { |
| 2926 | debug_printf("retry record exists: age=%s ", |
| 2927 | readconf_printtime(now - retry_record->time_stamp)); |
| 2928 | debug_printf("(max %s)\n", readconf_printtime(retry_data_expire)); |
| 2929 | debug_printf(" time to retry = %s expired = %d\n", |
| 2930 | readconf_printtime(retry_record->next_try - now), |
| 2931 | retry_record->expired); |
| 2932 | } |
| 2933 | |
| 2934 | if (f.queue_running && !f.deliver_force) |
| 2935 | { |
| 2936 | ok = (now - retry_record->time_stamp > retry_data_expire) |
| 2937 | || (now >= retry_record->next_try) |
| 2938 | || retry_record->expired; |
| 2939 | |
| 2940 | /* If we haven't reached the retry time, there is one more check |
| 2941 | to do, which is for the ultimate address timeout. */ |
| 2942 | |
| 2943 | if (!ok) |
| 2944 | ok = retry_ultimate_address_timeout(retry_key, addr2->domain, |
| 2945 | retry_record, now); |
| 2946 | } |
| 2947 | } |
| 2948 | else DEBUG(D_retry) debug_printf("no retry record exists\n"); |
| 2949 | } |
| 2950 | |
| 2951 | /* This address is to be delivered. Leave it on the chain. */ |
| 2952 | |
| 2953 | if (ok) |
| 2954 | { |
| 2955 | addr3 = addr2; |
| 2956 | addr2 = addr2->next; |
| 2957 | } |
| 2958 | |
| 2959 | /* This address is to be deferred. Take it out of the chain, and |
| 2960 | post-process it as complete. Must take it out of the chain first, |
| 2961 | because post processing puts it on another chain. */ |
| 2962 | |
| 2963 | else |
| 2964 | { |
| 2965 | address_item *this = addr2; |
| 2966 | this->message = US"Retry time not yet reached"; |
| 2967 | this->basic_errno = ERRNO_LRETRY; |
| 2968 | addr2 = addr3 ? (addr3->next = addr2->next) |
| 2969 | : (addr = addr2->next); |
| 2970 | post_process_one(this, DEFER, logflags, EXIM_DTYPE_TRANSPORT, 0); |
| 2971 | } |
| 2972 | } |
| 2973 | |
| 2974 | if (dbm_file) dbfn_close(dbm_file); |
| 2975 | |
| 2976 | /* If there are no addresses left on the chain, they all deferred. Loop |
| 2977 | for the next set of addresses. */ |
| 2978 | |
| 2979 | if (!addr) continue; |
| 2980 | |
| 2981 | /* If the transport is limited for parallellism, enforce that here. |
| 2982 | We use a hints DB entry, incremented here and decremented after |
| 2983 | the transport (and any shadow transport) completes. */ |
| 2984 | |
| 2985 | if (tpt_parallel_check(tp, addr, &serialize_key)) |
| 2986 | { |
| 2987 | if (expand_string_message) |
| 2988 | { |
| 2989 | logflags |= LOG_PANIC; |
| 2990 | do |
| 2991 | { |
| 2992 | addr = addr->next; |
| 2993 | post_process_one(addr, DEFER, logflags, EXIM_DTYPE_TRANSPORT, 0); |
| 2994 | } while ((addr = addr2)); |
| 2995 | } |
| 2996 | continue; /* Loop for the next set of addresses. */ |
| 2997 | } |
| 2998 | |
| 2999 | |
| 3000 | /* So, finally, we do have some addresses that can be passed to the |
| 3001 | transport. Before doing so, set up variables that are relevant to a |
| 3002 | single delivery. */ |
| 3003 | |
| 3004 | deliver_set_expansions(addr); |
| 3005 | |
| 3006 | gettimeofday(&delivery_start, NULL); |
| 3007 | deliver_local(addr, FALSE); |
| 3008 | timesince(&deliver_time, &delivery_start); |
| 3009 | |
| 3010 | /* If a shadow transport (which must perforce be another local transport), is |
| 3011 | defined, and its condition is met, we must pass the message to the shadow |
| 3012 | too, but only those addresses that succeeded. We do this by making a new |
| 3013 | chain of addresses - also to keep the original chain uncontaminated. We must |
| 3014 | use a chain rather than doing it one by one, because the shadow transport may |
| 3015 | batch. |
| 3016 | |
| 3017 | NOTE: if the condition fails because of a lookup defer, there is nothing we |
| 3018 | can do! */ |
| 3019 | |
| 3020 | if ( tp->shadow |
| 3021 | && ( !tp->shadow_condition |
| 3022 | || expand_check_condition(tp->shadow_condition, tp->name, US"transport") |
| 3023 | ) ) |
| 3024 | { |
| 3025 | transport_instance *stp; |
| 3026 | address_item *shadow_addr = NULL; |
| 3027 | address_item **last = &shadow_addr; |
| 3028 | |
| 3029 | for (stp = transports; stp; stp = stp->next) |
| 3030 | if (Ustrcmp(stp->name, tp->shadow) == 0) break; |
| 3031 | |
| 3032 | if (!stp) |
| 3033 | log_write(0, LOG_MAIN|LOG_PANIC, "shadow transport \"%s\" not found ", |
| 3034 | tp->shadow); |
| 3035 | |
| 3036 | /* Pick off the addresses that have succeeded, and make clones. Put into |
| 3037 | the shadow_message field a pointer to the shadow_message field of the real |
| 3038 | address. */ |
| 3039 | |
| 3040 | else for (addr2 = addr; addr2; addr2 = addr2->next) |
| 3041 | if (addr2->transport_return == OK) |
| 3042 | { |
| 3043 | addr3 = store_get(sizeof(address_item), FALSE); |
| 3044 | *addr3 = *addr2; |
| 3045 | addr3->next = NULL; |
| 3046 | addr3->shadow_message = US &addr2->shadow_message; |
| 3047 | addr3->transport = stp; |
| 3048 | addr3->transport_return = DEFER; |
| 3049 | addr3->return_filename = NULL; |
| 3050 | addr3->return_file = -1; |
| 3051 | *last = addr3; |
| 3052 | last = &addr3->next; |
| 3053 | } |
| 3054 | |
| 3055 | /* If we found any addresses to shadow, run the delivery, and stick any |
| 3056 | message back into the shadow_message field in the original. */ |
| 3057 | |
| 3058 | if (shadow_addr) |
| 3059 | { |
| 3060 | int save_count = transport_count; |
| 3061 | |
| 3062 | DEBUG(D_deliver|D_transport) |
| 3063 | debug_printf(">>>>>>>>>>>>>>>> Shadow delivery >>>>>>>>>>>>>>>>\n"); |
| 3064 | deliver_local(shadow_addr, TRUE); |
| 3065 | |
| 3066 | for(; shadow_addr; shadow_addr = shadow_addr->next) |
| 3067 | { |
| 3068 | int sresult = shadow_addr->transport_return; |
| 3069 | *(uschar **)shadow_addr->shadow_message = |
| 3070 | sresult == OK |
| 3071 | ? string_sprintf(" ST=%s", stp->name) |
| 3072 | : string_sprintf(" ST=%s (%s%s%s)", stp->name, |
| 3073 | shadow_addr->basic_errno <= 0 |
| 3074 | ? US"" |
| 3075 | : US strerror(shadow_addr->basic_errno), |
| 3076 | shadow_addr->basic_errno <= 0 || !shadow_addr->message |
| 3077 | ? US"" |
| 3078 | : US": ", |
| 3079 | shadow_addr->message |
| 3080 | ? shadow_addr->message |
| 3081 | : shadow_addr->basic_errno <= 0 |
| 3082 | ? US"unknown error" |
| 3083 | : US""); |
| 3084 | |
| 3085 | DEBUG(D_deliver|D_transport) |
| 3086 | debug_printf("%s shadow transport returned %s for %s\n", |
| 3087 | stp->name, rc_to_string(sresult), shadow_addr->address); |
| 3088 | } |
| 3089 | |
| 3090 | DEBUG(D_deliver|D_transport) |
| 3091 | debug_printf(">>>>>>>>>>>>>>>> End shadow delivery >>>>>>>>>>>>>>>>\n"); |
| 3092 | |
| 3093 | transport_count = save_count; /* Restore original transport count */ |
| 3094 | } |
| 3095 | } |
| 3096 | |
| 3097 | /* Cancel the expansions that were set up for the delivery. */ |
| 3098 | |
| 3099 | deliver_set_expansions(NULL); |
| 3100 | |
| 3101 | /* If the transport was parallelism-limited, decrement the hints DB record. */ |
| 3102 | |
| 3103 | if (serialize_key) enq_end(serialize_key); |
| 3104 | |
| 3105 | /* Now we can process the results of the real transport. We must take each |
| 3106 | address off the chain first, because post_process_one() puts it on another |
| 3107 | chain. */ |
| 3108 | |
| 3109 | for (addr2 = addr; addr2; addr2 = nextaddr) |
| 3110 | { |
| 3111 | int result = addr2->transport_return; |
| 3112 | nextaddr = addr2->next; |
| 3113 | |
| 3114 | DEBUG(D_deliver|D_transport) |
| 3115 | debug_printf("%s transport returned %s for %s\n", |
| 3116 | tp->name, rc_to_string(result), addr2->address); |
| 3117 | |
| 3118 | /* If there is a retry_record, or if delivery is deferred, build a retry |
| 3119 | item for setting a new retry time or deleting the old retry record from |
| 3120 | the database. These items are handled all together after all addresses |
| 3121 | have been handled (so the database is open just for a short time for |
| 3122 | updating). */ |
| 3123 | |
| 3124 | if (result == DEFER || testflag(addr2, af_lt_retry_exists)) |
| 3125 | { |
| 3126 | int flags = result == DEFER ? 0 : rf_delete; |
| 3127 | uschar *retry_key = string_copy(tp->retry_use_local_part |
| 3128 | ? addr2->address_retry_key : addr2->domain_retry_key); |
| 3129 | *retry_key = 'T'; |
| 3130 | retry_add_item(addr2, retry_key, flags); |
| 3131 | } |
| 3132 | |
| 3133 | /* Done with this address */ |
| 3134 | |
| 3135 | addr2->delivery_time = deliver_time; |
| 3136 | post_process_one(addr2, result, logflags, EXIM_DTYPE_TRANSPORT, logchar); |
| 3137 | |
| 3138 | /* If a pipe delivery generated text to be sent back, the result may be |
| 3139 | changed to FAIL, and we must copy this for subsequent addresses in the |
| 3140 | batch. */ |
| 3141 | |
| 3142 | if (addr2->transport_return != result) |
| 3143 | { |
| 3144 | for (addr3 = nextaddr; addr3; addr3 = addr3->next) |
| 3145 | { |
| 3146 | addr3->transport_return = addr2->transport_return; |
| 3147 | addr3->basic_errno = addr2->basic_errno; |
| 3148 | addr3->message = addr2->message; |
| 3149 | } |
| 3150 | result = addr2->transport_return; |
| 3151 | } |
| 3152 | |
| 3153 | /* Whether or not the result was changed to FAIL, we need to copy the |
| 3154 | return_file value from the first address into all the addresses of the |
| 3155 | batch, so they are all listed in the error message. */ |
| 3156 | |
| 3157 | addr2->return_file = addr->return_file; |
| 3158 | |
| 3159 | /* Change log character for recording successful deliveries. */ |
| 3160 | |
| 3161 | if (result == OK) logchar = '-'; |
| 3162 | } |
| 3163 | } /* Loop back for next batch of addresses */ |
| 3164 | } |
| 3165 | |
| 3166 | |
| 3167 | |
| 3168 | |
| 3169 | /************************************************* |
| 3170 | * Sort remote deliveries * |
| 3171 | *************************************************/ |
| 3172 | |
| 3173 | /* This function is called if remote_sort_domains is set. It arranges that the |
| 3174 | chain of addresses for remote deliveries is ordered according to the strings |
| 3175 | specified. Try to make this shuffling reasonably efficient by handling |
| 3176 | sequences of addresses rather than just single ones. |
| 3177 | |
| 3178 | Arguments: None |
| 3179 | Returns: Nothing |
| 3180 | */ |
| 3181 | |
| 3182 | static void |
| 3183 | sort_remote_deliveries(void) |
| 3184 | { |
| 3185 | int sep = 0; |
| 3186 | address_item **aptr = &addr_remote; |
| 3187 | const uschar *listptr = remote_sort_domains; |
| 3188 | uschar *pattern; |
| 3189 | uschar patbuf[256]; |
| 3190 | |
| 3191 | while ( *aptr |
| 3192 | && (pattern = string_nextinlist(&listptr, &sep, patbuf, sizeof(patbuf))) |
| 3193 | ) |
| 3194 | { |
| 3195 | address_item *moved = NULL; |
| 3196 | address_item **bptr = &moved; |
| 3197 | |
| 3198 | while (*aptr) |
| 3199 | { |
| 3200 | address_item **next; |
| 3201 | deliver_domain = (*aptr)->domain; /* set $domain */ |
| 3202 | if (match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1, |
| 3203 | &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK) |
| 3204 | { |
| 3205 | aptr = &(*aptr)->next; |
| 3206 | continue; |
| 3207 | } |
| 3208 | |
| 3209 | next = &(*aptr)->next; |
| 3210 | while ( *next |
| 3211 | && (deliver_domain = (*next)->domain, /* Set $domain */ |
| 3212 | match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1, |
| 3213 | &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL)) != OK |
| 3214 | ) |
| 3215 | next = &(*next)->next; |
| 3216 | |
| 3217 | /* If the batch of non-matchers is at the end, add on any that were |
| 3218 | extracted further up the chain, and end this iteration. Otherwise, |
| 3219 | extract them from the chain and hang on the moved chain. */ |
| 3220 | |
| 3221 | if (!*next) |
| 3222 | { |
| 3223 | *next = moved; |
| 3224 | break; |
| 3225 | } |
| 3226 | |
| 3227 | *bptr = *aptr; |
| 3228 | *aptr = *next; |
| 3229 | *next = NULL; |
| 3230 | bptr = next; |
| 3231 | aptr = &(*aptr)->next; |
| 3232 | } |
| 3233 | |
| 3234 | /* If the loop ended because the final address matched, *aptr will |
| 3235 | be NULL. Add on to the end any extracted non-matching addresses. If |
| 3236 | *aptr is not NULL, the loop ended via "break" when *next is null, that |
| 3237 | is, there was a string of non-matching addresses at the end. In this |
| 3238 | case the extracted addresses have already been added on the end. */ |
| 3239 | |
| 3240 | if (!*aptr) *aptr = moved; |
| 3241 | } |
| 3242 | |
| 3243 | DEBUG(D_deliver) |
| 3244 | { |
| 3245 | debug_printf("remote addresses after sorting:\n"); |
| 3246 | for (address_item * addr = addr_remote; addr; addr = addr->next) |
| 3247 | debug_printf(" %s\n", addr->address); |
| 3248 | } |
| 3249 | } |
| 3250 | |
| 3251 | |
| 3252 | |
| 3253 | /************************************************* |
| 3254 | * Read from pipe for remote delivery subprocess * |
| 3255 | *************************************************/ |
| 3256 | |
| 3257 | /* This function is called when the subprocess is complete, but can also be |
| 3258 | called before it is complete, in order to empty a pipe that is full (to prevent |
| 3259 | deadlock). It must therefore keep track of its progress in the parlist data |
| 3260 | block. |
| 3261 | |
| 3262 | We read the pipe to get the delivery status codes and a possible error message |
| 3263 | for each address, optionally preceded by unusability data for the hosts and |
| 3264 | also by optional retry data. |
| 3265 | |
| 3266 | Read in large chunks into the big buffer and then scan through, interpreting |
| 3267 | the data therein. In most cases, only a single read will be necessary. No |
| 3268 | individual item will ever be anywhere near 2500 bytes in length, so by ensuring |
| 3269 | that we read the next chunk when there is less than 2500 bytes left in the |
| 3270 | non-final chunk, we can assume each item is complete in the buffer before |
| 3271 | handling it. Each item is written using a single write(), which is atomic for |
| 3272 | small items (less than PIPE_BUF, which seems to be at least 512 in any Unix and |
| 3273 | often bigger) so even if we are reading while the subprocess is still going, we |
| 3274 | should never have only a partial item in the buffer. |
| 3275 | |
| 3276 | hs12: This assumption is not true anymore, since we get quite large items (certificate |
| 3277 | information and such). |
| 3278 | |
| 3279 | Argument: |
| 3280 | poffset the offset of the parlist item |
| 3281 | eop TRUE if the process has completed |
| 3282 | |
| 3283 | Returns: TRUE if the terminating 'Z' item has been read, |
| 3284 | or there has been a disaster (i.e. no more data needed); |
| 3285 | FALSE otherwise |
| 3286 | */ |
| 3287 | |
| 3288 | static BOOL |
| 3289 | par_read_pipe(int poffset, BOOL eop) |
| 3290 | { |
| 3291 | host_item *h; |
| 3292 | pardata *p = parlist + poffset; |
| 3293 | address_item *addrlist = p->addrlist; |
| 3294 | address_item *addr = p->addr; |
| 3295 | pid_t pid = p->pid; |
| 3296 | int fd = p->fd; |
| 3297 | |
| 3298 | uschar *msg = p->msg; |
| 3299 | BOOL done = p->done; |
| 3300 | |
| 3301 | /* Loop through all items, reading from the pipe when necessary. The pipe |
| 3302 | used to be non-blocking. But I do not see a reason for using non-blocking I/O |
| 3303 | here, as the preceding select() tells us, if data is available for reading. |
| 3304 | |
| 3305 | A read() on a "selected" handle should never block, but(!) it may return |
| 3306 | less data then we expected. (The buffer size we pass to read() shouldn't be |
| 3307 | understood as a "request", but as a "limit".) |
| 3308 | |
| 3309 | Each separate item is written to the pipe in a timely manner. But, especially for |
| 3310 | larger items, the read(2) may already return partial data from the write(2). |
| 3311 | |
| 3312 | The write is atomic mostly (depending on the amount written), but atomic does |
| 3313 | not imply "all or noting", it just is "not intermixed" with other writes on the |
| 3314 | same channel (pipe). |
| 3315 | |
| 3316 | */ |
| 3317 | |
| 3318 | DEBUG(D_deliver) debug_printf("reading pipe for subprocess %d (%s)\n", |
| 3319 | (int)p->pid, eop? "ended" : "not ended yet"); |
| 3320 | |
| 3321 | while (!done) |
| 3322 | { |
| 3323 | retry_item *r, **rp; |
| 3324 | uschar pipeheader[PIPE_HEADER_SIZE+1]; |
| 3325 | uschar *id = &pipeheader[0]; |
| 3326 | uschar *subid = &pipeheader[1]; |
| 3327 | uschar *ptr = big_buffer; |
| 3328 | size_t required = PIPE_HEADER_SIZE; /* first the pipehaeder, later the data */ |
| 3329 | ssize_t got; |
| 3330 | |
| 3331 | DEBUG(D_deliver) debug_printf( |
| 3332 | "expect %lu bytes (pipeheader) from tpt process %d\n", (u_long)required, pid); |
| 3333 | |
| 3334 | /* We require(!) all the PIPE_HEADER_SIZE bytes here, as we know, |
| 3335 | they're written in a timely manner, so waiting for the write shouldn't hurt a lot. |
| 3336 | If we get less, we can assume the subprocess do be done and do not expect any further |
| 3337 | information from it. */ |
| 3338 | |
| 3339 | if ((got = readn(fd, pipeheader, required)) != required) |
| 3340 | { |
| 3341 | msg = string_sprintf("got " SSIZE_T_FMT " of %d bytes (pipeheader) " |
| 3342 | "from transport process %d for transport %s", |
| 3343 | got, PIPE_HEADER_SIZE, pid, addr->transport->driver_name); |
| 3344 | done = TRUE; |
| 3345 | break; |
| 3346 | } |
| 3347 | |
| 3348 | pipeheader[PIPE_HEADER_SIZE] = '\0'; |
| 3349 | DEBUG(D_deliver) |
| 3350 | debug_printf("got %ld bytes (pipeheader) from transport process %d\n", |
| 3351 | (long) got, pid); |
| 3352 | |
| 3353 | { |
| 3354 | /* If we can't decode the pipeheader, the subprocess seems to have a |
| 3355 | problem, we do not expect any furher information from it. */ |
| 3356 | char *endc; |
| 3357 | required = Ustrtol(pipeheader+2, &endc, 10); |
| 3358 | if (*endc) |
| 3359 | { |
| 3360 | msg = string_sprintf("failed to read pipe " |
| 3361 | "from transport process %d for transport %s: error decoding size from header", |
| 3362 | pid, addr->transport->driver_name); |
| 3363 | done = TRUE; |
| 3364 | break; |
| 3365 | } |
| 3366 | } |
| 3367 | |
| 3368 | DEBUG(D_deliver) |
| 3369 | debug_printf("expect %lu bytes (pipedata) from transport process %d\n", |
| 3370 | (u_long)required, pid); |
| 3371 | |
| 3372 | /* Same as above, the transport process will write the bytes announced |
| 3373 | in a timely manner, so we can just wait for the bytes, getting less than expected |
| 3374 | is considered a problem of the subprocess, we do not expect anything else from it. */ |
| 3375 | if ((got = readn(fd, big_buffer, required)) != required) |
| 3376 | { |
| 3377 | msg = string_sprintf("got only " SSIZE_T_FMT " of " SIZE_T_FMT |
| 3378 | " bytes (pipedata) from transport process %d for transport %s", |
| 3379 | got, required, pid, addr->transport->driver_name); |
| 3380 | done = TRUE; |
| 3381 | break; |
| 3382 | } |
| 3383 | |
| 3384 | /* Handle each possible type of item, assuming the complete item is |
| 3385 | available in store. */ |
| 3386 | |
| 3387 | switch (*id) |
| 3388 | { |
| 3389 | /* Host items exist only if any hosts were marked unusable. Match |
| 3390 | up by checking the IP address. */ |
| 3391 | |
| 3392 | case 'H': |
| 3393 | for (h = addrlist->host_list; h; h = h->next) |
| 3394 | { |
| 3395 | if (!h->address || Ustrcmp(h->address, ptr+2) != 0) continue; |
| 3396 | h->status = ptr[0]; |
| 3397 | h->why = ptr[1]; |
| 3398 | } |
| 3399 | ptr += 2; |
| 3400 | while (*ptr++); |
| 3401 | break; |
| 3402 | |
| 3403 | /* Retry items are sent in a preceding R item for each address. This is |
| 3404 | kept separate to keep each message short enough to guarantee it won't |
| 3405 | be split in the pipe. Hopefully, in the majority of cases, there won't in |
| 3406 | fact be any retry items at all. |
| 3407 | |
| 3408 | The complete set of retry items might include an item to delete a |
| 3409 | routing retry if there was a previous routing delay. However, routing |
| 3410 | retries are also used when a remote transport identifies an address error. |
| 3411 | In that case, there may also be an "add" item for the same key. Arrange |
| 3412 | that a "delete" item is dropped in favour of an "add" item. */ |
| 3413 | |
| 3414 | case 'R': |
| 3415 | if (!addr) goto ADDR_MISMATCH; |
| 3416 | |
| 3417 | DEBUG(D_deliver|D_retry) |
| 3418 | debug_printf("reading retry information for %s from subprocess\n", |
| 3419 | ptr+1); |
| 3420 | |
| 3421 | /* Cut out any "delete" items on the list. */ |
| 3422 | |
| 3423 | for (rp = &addr->retries; (r = *rp); rp = &r->next) |
| 3424 | if (Ustrcmp(r->key, ptr+1) == 0) /* Found item with same key */ |
| 3425 | { |
| 3426 | if (!(r->flags & rf_delete)) break; /* It was not "delete" */ |
| 3427 | *rp = r->next; /* Excise a delete item */ |
| 3428 | DEBUG(D_deliver|D_retry) |
| 3429 | debug_printf(" existing delete item dropped\n"); |
| 3430 | } |
| 3431 | |
| 3432 | /* We want to add a delete item only if there is no non-delete item; |
| 3433 | however we still have to step ptr through the data. */ |
| 3434 | |
| 3435 | if (!r || !(*ptr & rf_delete)) |
| 3436 | { |
| 3437 | r = store_get(sizeof(retry_item), FALSE); |
| 3438 | r->next = addr->retries; |
| 3439 | addr->retries = r; |
| 3440 | r->flags = *ptr++; |
| 3441 | r->key = string_copy(ptr); |
| 3442 | while (*ptr++); |
| 3443 | memcpy(&r->basic_errno, ptr, sizeof(r->basic_errno)); |
| 3444 | ptr += sizeof(r->basic_errno); |
| 3445 | memcpy(&r->more_errno, ptr, sizeof(r->more_errno)); |
| 3446 | ptr += sizeof(r->more_errno); |
| 3447 | r->message = *ptr ? string_copy(ptr) : NULL; |
| 3448 | DEBUG(D_deliver|D_retry) debug_printf(" added %s item\n", |
| 3449 | r->flags & rf_delete ? "delete" : "retry"); |
| 3450 | } |
| 3451 | |
| 3452 | else |
| 3453 | { |
| 3454 | DEBUG(D_deliver|D_retry) |
| 3455 | debug_printf(" delete item not added: non-delete item exists\n"); |
| 3456 | ptr++; |
| 3457 | while(*ptr++); |
| 3458 | ptr += sizeof(r->basic_errno) + sizeof(r->more_errno); |
| 3459 | } |
| 3460 | |
| 3461 | while(*ptr++); |
| 3462 | break; |
| 3463 | |
| 3464 | /* Put the amount of data written into the parlist block */ |
| 3465 | |
| 3466 | case 'S': |
| 3467 | memcpy(&(p->transport_count), ptr, sizeof(transport_count)); |
| 3468 | ptr += sizeof(transport_count); |
| 3469 | break; |
| 3470 | |
| 3471 | /* Address items are in the order of items on the address chain. We |
| 3472 | remember the current address value in case this function is called |
| 3473 | several times to empty the pipe in stages. Information about delivery |
| 3474 | over TLS is sent in a preceding X item for each address. We don't put |
| 3475 | it in with the other info, in order to keep each message short enough to |
| 3476 | guarantee it won't be split in the pipe. */ |
| 3477 | |
| 3478 | #ifndef DISABLE_TLS |
| 3479 | case 'X': |
| 3480 | if (!addr) goto ADDR_MISMATCH; /* Below, in 'A' handler */ |
| 3481 | switch (*subid) |
| 3482 | { |
| 3483 | case '1': |
| 3484 | addr->tlsver = addr->cipher = addr->peerdn = NULL; |
| 3485 | |
| 3486 | if (*ptr) |
| 3487 | { |
| 3488 | addr->cipher = string_copy(ptr); |
| 3489 | addr->tlsver = string_copyn(ptr, Ustrchr(ptr, ':') - ptr); |
| 3490 | } |
| 3491 | while (*ptr++); |
| 3492 | if (*ptr) |
| 3493 | addr->peerdn = string_copy(ptr); |
| 3494 | break; |
| 3495 | |
| 3496 | case '2': |
| 3497 | if (*ptr) |
| 3498 | (void) tls_import_cert(ptr, &addr->peercert); |
| 3499 | else |
| 3500 | addr->peercert = NULL; |
| 3501 | break; |
| 3502 | |
| 3503 | case '3': |
| 3504 | if (*ptr) |
| 3505 | (void) tls_import_cert(ptr, &addr->ourcert); |
| 3506 | else |
| 3507 | addr->ourcert = NULL; |
| 3508 | break; |
| 3509 | |
| 3510 | # ifndef DISABLE_OCSP |
| 3511 | case '4': |
| 3512 | addr->ocsp = *ptr ? *ptr - '0' : OCSP_NOT_REQ; |
| 3513 | break; |
| 3514 | # endif |
| 3515 | } |
| 3516 | while (*ptr++); |
| 3517 | break; |
| 3518 | #endif /*DISABLE_TLS*/ |
| 3519 | |
| 3520 | case 'C': /* client authenticator information */ |
| 3521 | switch (*subid) |
| 3522 | { |
| 3523 | case '1': addr->authenticator = *ptr ? string_copy(ptr) : NULL; break; |
| 3524 | case '2': addr->auth_id = *ptr ? string_copy(ptr) : NULL; break; |
| 3525 | case '3': addr->auth_sndr = *ptr ? string_copy(ptr) : NULL; break; |
| 3526 | } |
| 3527 | while (*ptr++); |
| 3528 | break; |
| 3529 | |
| 3530 | #ifndef DISABLE_PRDR |
| 3531 | case 'P': |
| 3532 | setflag(addr, af_prdr_used); |
| 3533 | break; |
| 3534 | #endif |
| 3535 | |
| 3536 | case 'L': |
| 3537 | switch (*subid) |
| 3538 | { |
| 3539 | #ifndef DISABLE_PIPE_CONNECT |
| 3540 | case 2: setflag(addr, af_early_pipe); /*FALLTHROUGH*/ |
| 3541 | #endif |
| 3542 | case 1: setflag(addr, af_pipelining); break; |
| 3543 | } |
| 3544 | break; |
| 3545 | |
| 3546 | case 'K': |
| 3547 | setflag(addr, af_chunking_used); |
| 3548 | break; |
| 3549 | |
| 3550 | case 'T': |
| 3551 | setflag(addr, af_tcp_fastopen_conn); |
| 3552 | if (*subid > '0') setflag(addr, af_tcp_fastopen); |
| 3553 | if (*subid > '1') setflag(addr, af_tcp_fastopen_data); |
| 3554 | break; |
| 3555 | |
| 3556 | case 'D': |
| 3557 | if (!addr) goto ADDR_MISMATCH; |
| 3558 | memcpy(&(addr->dsn_aware), ptr, sizeof(addr->dsn_aware)); |
| 3559 | ptr += sizeof(addr->dsn_aware); |
| 3560 | DEBUG(D_deliver) debug_printf("DSN read: addr->dsn_aware = %d\n", addr->dsn_aware); |
| 3561 | break; |
| 3562 | |
| 3563 | case 'A': |
| 3564 | if (!addr) |
| 3565 | { |
| 3566 | ADDR_MISMATCH: |
| 3567 | msg = string_sprintf("address count mismatch for data read from pipe " |
| 3568 | "for transport process %d for transport %s", pid, |
| 3569 | addrlist->transport->driver_name); |
| 3570 | done = TRUE; |
| 3571 | break; |
| 3572 | } |
| 3573 | |
| 3574 | switch (*subid) |
| 3575 | { |
| 3576 | #ifdef SUPPORT_SOCKS |
| 3577 | case '2': /* proxy information; must arrive before A0 and applies to that addr XXX oops*/ |
| 3578 | proxy_session = TRUE; /*XXX should this be cleared somewhere? */ |
| 3579 | if (*ptr == 0) |
| 3580 | ptr++; |
| 3581 | else |
| 3582 | { |
| 3583 | proxy_local_address = string_copy(ptr); |
| 3584 | while(*ptr++); |
| 3585 | memcpy(&proxy_local_port, ptr, sizeof(proxy_local_port)); |
| 3586 | ptr += sizeof(proxy_local_port); |
| 3587 | } |
| 3588 | break; |
| 3589 | #endif |
| 3590 | |
| 3591 | #ifdef EXPERIMENTAL_DSN_INFO |
| 3592 | case '1': /* must arrive before A0, and applies to that addr */ |
| 3593 | /* Two strings: smtp_greeting and helo_response */ |
| 3594 | addr->smtp_greeting = string_copy(ptr); |
| 3595 | while(*ptr++); |
| 3596 | addr->helo_response = string_copy(ptr); |
| 3597 | while(*ptr++); |
| 3598 | break; |
| 3599 | #endif |
| 3600 | |
| 3601 | case '0': |
| 3602 | DEBUG(D_deliver) debug_printf("A0 %s tret %d\n", addr->address, *ptr); |
| 3603 | addr->transport_return = *ptr++; |
| 3604 | addr->special_action = *ptr++; |
| 3605 | memcpy(&addr->basic_errno, ptr, sizeof(addr->basic_errno)); |
| 3606 | ptr += sizeof(addr->basic_errno); |
| 3607 | memcpy(&addr->more_errno, ptr, sizeof(addr->more_errno)); |
| 3608 | ptr += sizeof(addr->more_errno); |
| 3609 | memcpy(&addr->delivery_time, ptr, sizeof(addr->delivery_time)); |
| 3610 | ptr += sizeof(addr->delivery_time); |
| 3611 | memcpy(&addr->flags, ptr, sizeof(addr->flags)); |
| 3612 | ptr += sizeof(addr->flags); |
| 3613 | addr->message = *ptr ? string_copy(ptr) : NULL; |
| 3614 | while(*ptr++); |
| 3615 | addr->user_message = *ptr ? string_copy(ptr) : NULL; |
| 3616 | while(*ptr++); |
| 3617 | |
| 3618 | /* Always two strings for host information, followed by the port number and DNSSEC mark */ |
| 3619 | |
| 3620 | if (*ptr) |
| 3621 | { |
| 3622 | h = store_get(sizeof(host_item), FALSE); |
| 3623 | h->name = string_copy(ptr); |
| 3624 | while (*ptr++); |
| 3625 | h->address = string_copy(ptr); |
| 3626 | while(*ptr++); |
| 3627 | memcpy(&h->port, ptr, sizeof(h->port)); |
| 3628 | ptr += sizeof(h->port); |
| 3629 | h->dnssec = *ptr == '2' ? DS_YES |
| 3630 | : *ptr == '1' ? DS_NO |
| 3631 | : DS_UNK; |
| 3632 | ptr++; |
| 3633 | addr->host_used = h; |
| 3634 | } |
| 3635 | else ptr++; |
| 3636 | |
| 3637 | /* Finished with this address */ |
| 3638 | |
| 3639 | addr = addr->next; |
| 3640 | break; |
| 3641 | } |
| 3642 | break; |
| 3643 | |
| 3644 | /* Local interface address/port */ |
| 3645 | case 'I': |
| 3646 | if (*ptr) sending_ip_address = string_copy(ptr); |
| 3647 | while (*ptr++) ; |
| 3648 | if (*ptr) sending_port = atoi(CS ptr); |
| 3649 | while (*ptr++) ; |
| 3650 | break; |
| 3651 | |
| 3652 | /* Z marks the logical end of the data. It is followed by '0' if |
| 3653 | continue_transport was NULL at the end of transporting, otherwise '1'. |
| 3654 | We need to know when it becomes NULL during a delivery down a passed SMTP |
| 3655 | channel so that we don't try to pass anything more down it. Of course, for |
| 3656 | most normal messages it will remain NULL all the time. */ |
| 3657 | |
| 3658 | case 'Z': |
| 3659 | if (*ptr == '0') |
| 3660 | { |
| 3661 | continue_transport = NULL; |
| 3662 | continue_hostname = NULL; |
| 3663 | } |
| 3664 | done = TRUE; |
| 3665 | DEBUG(D_deliver) debug_printf("Z0%c item read\n", *ptr); |
| 3666 | break; |
| 3667 | |
| 3668 | /* Anything else is a disaster. */ |
| 3669 | |
| 3670 | default: |
| 3671 | msg = string_sprintf("malformed data (%d) read from pipe for transport " |
| 3672 | "process %d for transport %s", ptr[-1], pid, |
| 3673 | addr->transport->driver_name); |
| 3674 | done = TRUE; |
| 3675 | break; |
| 3676 | } |
| 3677 | } |
| 3678 | |
| 3679 | /* The done flag is inspected externally, to determine whether or not to |
| 3680 | call the function again when the process finishes. */ |
| 3681 | |
| 3682 | p->done = done; |
| 3683 | |
| 3684 | /* If the process hadn't finished, and we haven't seen the end of the data |
| 3685 | or if we suffered a disaster, update the rest of the state, and return FALSE to |
| 3686 | indicate "not finished". */ |
| 3687 | |
| 3688 | if (!eop && !done) |
| 3689 | { |
| 3690 | p->addr = addr; |
| 3691 | p->msg = msg; |
| 3692 | return FALSE; |
| 3693 | } |
| 3694 | |
| 3695 | /* Close our end of the pipe, to prevent deadlock if the far end is still |
| 3696 | pushing stuff into it. */ |
| 3697 | |
| 3698 | (void)close(fd); |
| 3699 | p->fd = -1; |
| 3700 | |
| 3701 | /* If we have finished without error, but haven't had data for every address, |
| 3702 | something is wrong. */ |
| 3703 | |
| 3704 | if (!msg && addr) |
| 3705 | msg = string_sprintf("insufficient address data read from pipe " |
| 3706 | "for transport process %d for transport %s", pid, |
| 3707 | addr->transport->driver_name); |
| 3708 | |
| 3709 | /* If an error message is set, something has gone wrong in getting back |
| 3710 | the delivery data. Put the message into each address and freeze it. */ |
| 3711 | |
| 3712 | if (msg) |
| 3713 | for (addr = addrlist; addr; addr = addr->next) |
| 3714 | { |
| 3715 | addr->transport_return = DEFER; |
| 3716 | addr->special_action = SPECIAL_FREEZE; |
| 3717 | addr->message = msg; |
| 3718 | log_write(0, LOG_MAIN|LOG_PANIC, "Delivery status for %s: %s\n", addr->address, addr->message); |
| 3719 | } |
| 3720 | |
| 3721 | /* Return TRUE to indicate we have got all we need from this process, even |
| 3722 | if it hasn't actually finished yet. */ |
| 3723 | |
| 3724 | return TRUE; |
| 3725 | } |
| 3726 | |
| 3727 | |
| 3728 | |
| 3729 | /************************************************* |
| 3730 | * Post-process a set of remote addresses * |
| 3731 | *************************************************/ |
| 3732 | |
| 3733 | /* Do what has to be done immediately after a remote delivery for each set of |
| 3734 | addresses, then re-write the spool if necessary. Note that post_process_one |
| 3735 | puts the address on an appropriate queue; hence we must fish off the next |
| 3736 | one first. This function is also called if there is a problem with setting |
| 3737 | up a subprocess to do a remote delivery in parallel. In this case, the final |
| 3738 | argument contains a message, and the action must be forced to DEFER. |
| 3739 | |
| 3740 | Argument: |
| 3741 | addr pointer to chain of address items |
| 3742 | logflags flags for logging |
| 3743 | msg NULL for normal cases; -> error message for unexpected problems |
| 3744 | fallback TRUE if processing fallback hosts |
| 3745 | |
| 3746 | Returns: nothing |
| 3747 | */ |
| 3748 | |
| 3749 | static void |
| 3750 | remote_post_process(address_item *addr, int logflags, uschar *msg, |
| 3751 | BOOL fallback) |
| 3752 | { |
| 3753 | /* If any host addresses were found to be unusable, add them to the unusable |
| 3754 | tree so that subsequent deliveries don't try them. */ |
| 3755 | |
| 3756 | for (host_item * h = addr->host_list; h; h = h->next) |
| 3757 | if (h->address) |
| 3758 | if (h->status >= hstatus_unusable) tree_add_unusable(h); |
| 3759 | |
| 3760 | /* Now handle each address on the chain. The transport has placed '=' or '-' |
| 3761 | into the special_action field for each successful delivery. */ |
| 3762 | |
| 3763 | while (addr) |
| 3764 | { |
| 3765 | address_item *next = addr->next; |
| 3766 | |
| 3767 | /* If msg == NULL (normal processing) and the result is DEFER and we are |
| 3768 | processing the main hosts and there are fallback hosts available, put the |
| 3769 | address on the list for fallback delivery. */ |
| 3770 | |
| 3771 | if ( addr->transport_return == DEFER |
| 3772 | && addr->fallback_hosts |
| 3773 | && !fallback |
| 3774 | && !msg |
| 3775 | ) |
| 3776 | { |
| 3777 | addr->host_list = addr->fallback_hosts; |
| 3778 | addr->next = addr_fallback; |
| 3779 | addr_fallback = addr; |
| 3780 | DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", addr->address); |
| 3781 | } |
| 3782 | |
| 3783 | /* If msg is set (=> unexpected problem), set it in the address before |
| 3784 | doing the ordinary post processing. */ |
| 3785 | |
| 3786 | else |
| 3787 | { |
| 3788 | if (msg) |
| 3789 | { |
| 3790 | addr->message = msg; |
| 3791 | addr->transport_return = DEFER; |
| 3792 | } |
| 3793 | (void)post_process_one(addr, addr->transport_return, logflags, |
| 3794 | EXIM_DTYPE_TRANSPORT, addr->special_action); |
| 3795 | } |
| 3796 | |
| 3797 | /* Next address */ |
| 3798 | |
| 3799 | addr = next; |
| 3800 | } |
| 3801 | |
| 3802 | /* If we have just delivered down a passed SMTP channel, and that was |
| 3803 | the last address, the channel will have been closed down. Now that |
| 3804 | we have logged that delivery, set continue_sequence to 1 so that |
| 3805 | any subsequent deliveries don't get "*" incorrectly logged. */ |
| 3806 | |
| 3807 | if (!continue_transport) continue_sequence = 1; |
| 3808 | } |
| 3809 | |
| 3810 | |
| 3811 | |
| 3812 | /************************************************* |
| 3813 | * Wait for one remote delivery subprocess * |
| 3814 | *************************************************/ |
| 3815 | |
| 3816 | /* This function is called while doing remote deliveries when either the |
| 3817 | maximum number of processes exist and we need one to complete so that another |
| 3818 | can be created, or when waiting for the last ones to complete. It must wait for |
| 3819 | the completion of one subprocess, empty the control block slot, and return a |
| 3820 | pointer to the address chain. |
| 3821 | |
| 3822 | Arguments: none |
| 3823 | Returns: pointer to the chain of addresses handled by the process; |
| 3824 | NULL if no subprocess found - this is an unexpected error |
| 3825 | */ |
| 3826 | |
| 3827 | static address_item * |
| 3828 | par_wait(void) |
| 3829 | { |
| 3830 | int poffset, status; |
| 3831 | address_item *addr, *addrlist; |
| 3832 | pid_t pid; |
| 3833 | |
| 3834 | set_process_info("delivering %s: waiting for a remote delivery subprocess " |
| 3835 | "to finish", message_id); |
| 3836 | |
| 3837 | /* Loop until either a subprocess completes, or there are no subprocesses in |
| 3838 | existence - in which case give an error return. We cannot proceed just by |
| 3839 | waiting for a completion, because a subprocess may have filled up its pipe, and |
| 3840 | be waiting for it to be emptied. Therefore, if no processes have finished, we |
| 3841 | wait for one of the pipes to acquire some data by calling select(), with a |
| 3842 | timeout just in case. |
| 3843 | |
| 3844 | The simple approach is just to iterate after reading data from a ready pipe. |
| 3845 | This leads to non-ideal behaviour when the subprocess has written its final Z |
| 3846 | item, closed the pipe, and is in the process of exiting (the common case). A |
| 3847 | call to waitpid() yields nothing completed, but select() shows the pipe ready - |
| 3848 | reading it yields EOF, so you end up with busy-waiting until the subprocess has |
| 3849 | actually finished. |
| 3850 | |
| 3851 | To avoid this, if all the data that is needed has been read from a subprocess |
| 3852 | after select(), an explicit wait() for it is done. We know that all it is doing |
| 3853 | is writing to the pipe and then exiting, so the wait should not be long. |
| 3854 | |
| 3855 | The non-blocking waitpid() is to some extent just insurance; if we could |
| 3856 | reliably detect end-of-file on the pipe, we could always know when to do a |
| 3857 | blocking wait() for a completed process. However, because some systems use |
| 3858 | NDELAY, which doesn't distinguish between EOF and pipe empty, it is easier to |
| 3859 | use code that functions without the need to recognize EOF. |
| 3860 | |
| 3861 | There's a double loop here just in case we end up with a process that is not in |
| 3862 | the list of remote delivery processes. Something has obviously gone wrong if |
| 3863 | this is the case. (For example, a process that is incorrectly left over from |
| 3864 | routing or local deliveries might be found.) The damage can be minimized by |
| 3865 | looping back and looking for another process. If there aren't any, the error |
| 3866 | return will happen. */ |
| 3867 | |
| 3868 | for (;;) /* Normally we do not repeat this loop */ |
| 3869 | { |
| 3870 | while ((pid = waitpid(-1, &status, WNOHANG)) <= 0) |
| 3871 | { |
| 3872 | struct timeval tv; |
| 3873 | fd_set select_pipes; |
| 3874 | int maxpipe, readycount; |
| 3875 | |
| 3876 | /* A return value of -1 can mean several things. If errno != ECHILD, it |
| 3877 | either means invalid options (which we discount), or that this process was |
| 3878 | interrupted by a signal. Just loop to try the waitpid() again. |
| 3879 | |
| 3880 | If errno == ECHILD, waitpid() is telling us that there are no subprocesses |
| 3881 | in existence. This should never happen, and is an unexpected error. |
| 3882 | However, there is a nasty complication when running under Linux. If "strace |
| 3883 | -f" is being used under Linux to trace this process and its children, |
| 3884 | subprocesses are "stolen" from their parents and become the children of the |
| 3885 | tracing process. A general wait such as the one we've just obeyed returns |
| 3886 | as if there are no children while subprocesses are running. Once a |
| 3887 | subprocess completes, it is restored to the parent, and waitpid(-1) finds |
| 3888 | it. Thanks to Joachim Wieland for finding all this out and suggesting a |
| 3889 | palliative. |
| 3890 | |
| 3891 | This does not happen using "truss" on Solaris, nor (I think) with other |
| 3892 | tracing facilities on other OS. It seems to be specific to Linux. |
| 3893 | |
| 3894 | What we do to get round this is to use kill() to see if any of our |
| 3895 | subprocesses are still in existence. If kill() gives an OK return, we know |
| 3896 | it must be for one of our processes - it can't be for a re-use of the pid, |
| 3897 | because if our process had finished, waitpid() would have found it. If any |
| 3898 | of our subprocesses are in existence, we proceed to use select() as if |
| 3899 | waitpid() had returned zero. I think this is safe. */ |
| 3900 | |
| 3901 | if (pid < 0) |
| 3902 | { |
| 3903 | if (errno != ECHILD) continue; /* Repeats the waitpid() */ |
| 3904 | |
| 3905 | DEBUG(D_deliver) |
| 3906 | debug_printf("waitpid() returned -1/ECHILD: checking explicitly " |
| 3907 | "for process existence\n"); |
| 3908 | |
| 3909 | for (poffset = 0; poffset < remote_max_parallel; poffset++) |
| 3910 | { |
| 3911 | if ((pid = parlist[poffset].pid) != 0 && kill(pid, 0) == 0) |
| 3912 | { |
| 3913 | DEBUG(D_deliver) debug_printf("process %d still exists: assume " |
| 3914 | "stolen by strace\n", (int)pid); |
| 3915 | break; /* With poffset set */ |
| 3916 | } |
| 3917 | } |
| 3918 | |
| 3919 | if (poffset >= remote_max_parallel) |
| 3920 | { |
| 3921 | DEBUG(D_deliver) debug_printf("*** no delivery children found\n"); |
| 3922 | return NULL; /* This is the error return */ |
| 3923 | } |
| 3924 | } |
| 3925 | |
| 3926 | /* A pid value greater than 0 breaks the "while" loop. A negative value has |
| 3927 | been handled above. A return value of zero means that there is at least one |
| 3928 | subprocess, but there are no completed subprocesses. See if any pipes are |
| 3929 | ready with any data for reading. */ |
| 3930 | |
| 3931 | DEBUG(D_deliver) debug_printf("selecting on subprocess pipes\n"); |
| 3932 | |
| 3933 | maxpipe = 0; |
| 3934 | FD_ZERO(&select_pipes); |
| 3935 | for (poffset = 0; poffset < remote_max_parallel; poffset++) |
| 3936 | if (parlist[poffset].pid != 0) |
| 3937 | { |
| 3938 | int fd = parlist[poffset].fd; |
| 3939 | FD_SET(fd, &select_pipes); |
| 3940 | if (fd > maxpipe) maxpipe = fd; |
| 3941 | } |
| 3942 | |
| 3943 | /* Stick in a 60-second timeout, just in case. */ |
| 3944 | |
| 3945 | tv.tv_sec = 60; |
| 3946 | tv.tv_usec = 0; |
| 3947 | |
| 3948 | readycount = select(maxpipe + 1, (SELECT_ARG2_TYPE *)&select_pipes, |
| 3949 | NULL, NULL, &tv); |
| 3950 | |
| 3951 | /* Scan through the pipes and read any that are ready; use the count |
| 3952 | returned by select() to stop when there are no more. Select() can return |
| 3953 | with no processes (e.g. if interrupted). This shouldn't matter. |
| 3954 | |
| 3955 | If par_read_pipe() returns TRUE, it means that either the terminating Z was |
| 3956 | read, or there was a disaster. In either case, we are finished with this |
| 3957 | process. Do an explicit wait() for the process and break the main loop if |
| 3958 | it succeeds. |
| 3959 | |
| 3960 | It turns out that we have to deal with the case of an interrupted system |
| 3961 | call, which can happen on some operating systems if the signal handling is |
| 3962 | set up to do that by default. */ |
| 3963 | |
| 3964 | for (poffset = 0; |
| 3965 | readycount > 0 && poffset < remote_max_parallel; |
| 3966 | poffset++) |
| 3967 | { |
| 3968 | if ( (pid = parlist[poffset].pid) != 0 |
| 3969 | && FD_ISSET(parlist[poffset].fd, &select_pipes) |
| 3970 | ) |
| 3971 | { |
| 3972 | readycount--; |
| 3973 | if (par_read_pipe(poffset, FALSE)) /* Finished with this pipe */ |
| 3974 | for (;;) /* Loop for signals */ |
| 3975 | { |
| 3976 | pid_t endedpid = waitpid(pid, &status, 0); |
| 3977 | if (endedpid == pid) goto PROCESS_DONE; |
| 3978 | if (endedpid != (pid_t)(-1) || errno != EINTR) |
| 3979 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Unexpected error return " |
| 3980 | "%d (errno = %d) from waitpid() for process %d", |
| 3981 | (int)endedpid, errno, (int)pid); |
| 3982 | } |
| 3983 | } |
| 3984 | } |
| 3985 | |
| 3986 | /* Now go back and look for a completed subprocess again. */ |
| 3987 | } |
| 3988 | |
| 3989 | /* A completed process was detected by the non-blocking waitpid(). Find the |
| 3990 | data block that corresponds to this subprocess. */ |
| 3991 | |
| 3992 | for (poffset = 0; poffset < remote_max_parallel; poffset++) |
| 3993 | if (pid == parlist[poffset].pid) break; |
| 3994 | |
| 3995 | /* Found the data block; this is a known remote delivery process. We don't |
| 3996 | need to repeat the outer loop. This should be what normally happens. */ |
| 3997 | |
| 3998 | if (poffset < remote_max_parallel) break; |
| 3999 | |
| 4000 | /* This situation is an error, but it's probably better to carry on looking |
| 4001 | for another process than to give up (as we used to do). */ |
| 4002 | |
| 4003 | log_write(0, LOG_MAIN|LOG_PANIC, "Process %d finished: not found in remote " |
| 4004 | "transport process list", pid); |
| 4005 | } /* End of the "for" loop */ |
| 4006 | |
| 4007 | /* Come here when all the data was completely read after a select(), and |
| 4008 | the process in pid has been wait()ed for. */ |
| 4009 | |
| 4010 | PROCESS_DONE: |
| 4011 | |
| 4012 | DEBUG(D_deliver) |
| 4013 | { |
| 4014 | if (status == 0) |
| 4015 | debug_printf("remote delivery process %d ended\n", (int)pid); |
| 4016 | else |
| 4017 | debug_printf("remote delivery process %d ended: status=%04x\n", (int)pid, |
| 4018 | status); |
| 4019 | } |
| 4020 | |
| 4021 | set_process_info("delivering %s", message_id); |
| 4022 | |
| 4023 | /* Get the chain of processed addresses */ |
| 4024 | |
| 4025 | addrlist = parlist[poffset].addrlist; |
| 4026 | |
| 4027 | /* If the process did not finish cleanly, record an error and freeze (except |
| 4028 | for SIGTERM, SIGKILL and SIGQUIT), and also ensure the journal is not removed, |
| 4029 | in case the delivery did actually happen. */ |
| 4030 | |
| 4031 | if ((status & 0xffff) != 0) |
| 4032 | { |
| 4033 | uschar *msg; |
| 4034 | int msb = (status >> 8) & 255; |
| 4035 | int lsb = status & 255; |
| 4036 | int code = (msb == 0)? (lsb & 0x7f) : msb; |
| 4037 | |
| 4038 | msg = string_sprintf("%s transport process returned non-zero status 0x%04x: " |
| 4039 | "%s %d", |
| 4040 | addrlist->transport->driver_name, |
| 4041 | status, |
| 4042 | (msb == 0)? "terminated by signal" : "exit code", |
| 4043 | code); |
| 4044 | |
| 4045 | if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT)) |
| 4046 | addrlist->special_action = SPECIAL_FREEZE; |
| 4047 | |
| 4048 | for (addr = addrlist; addr; addr = addr->next) |
| 4049 | { |
| 4050 | addr->transport_return = DEFER; |
| 4051 | addr->message = msg; |
| 4052 | } |
| 4053 | |
| 4054 | remove_journal = FALSE; |
| 4055 | } |
| 4056 | |
| 4057 | /* Else complete reading the pipe to get the result of the delivery, if all |
| 4058 | the data has not yet been obtained. */ |
| 4059 | |
| 4060 | else if (!parlist[poffset].done) (void)par_read_pipe(poffset, TRUE); |
| 4061 | |
| 4062 | /* Put the data count and return path into globals, mark the data slot unused, |
| 4063 | decrement the count of subprocesses, and return the address chain. */ |
| 4064 | |
| 4065 | transport_count = parlist[poffset].transport_count; |
| 4066 | used_return_path = parlist[poffset].return_path; |
| 4067 | parlist[poffset].pid = 0; |
| 4068 | parcount--; |
| 4069 | return addrlist; |
| 4070 | } |
| 4071 | |
| 4072 | |
| 4073 | |
| 4074 | /************************************************* |
| 4075 | * Wait for subprocesses and post-process * |
| 4076 | *************************************************/ |
| 4077 | |
| 4078 | /* This function waits for subprocesses until the number that are still running |
| 4079 | is below a given threshold. For each complete subprocess, the addresses are |
| 4080 | post-processed. If we can't find a running process, there is some shambles. |
| 4081 | Better not bomb out, as that might lead to multiple copies of the message. Just |
| 4082 | log and proceed as if all done. |
| 4083 | |
| 4084 | Arguments: |
| 4085 | max maximum number of subprocesses to leave running |
| 4086 | fallback TRUE if processing fallback hosts |
| 4087 | |
| 4088 | Returns: nothing |
| 4089 | */ |
| 4090 | |
| 4091 | static void |
| 4092 | par_reduce(int max, BOOL fallback) |
| 4093 | { |
| 4094 | while (parcount > max) |
| 4095 | { |
| 4096 | address_item *doneaddr = par_wait(); |
| 4097 | if (!doneaddr) |
| 4098 | { |
| 4099 | log_write(0, LOG_MAIN|LOG_PANIC, |
| 4100 | "remote delivery process count got out of step"); |
| 4101 | parcount = 0; |
| 4102 | } |
| 4103 | else |
| 4104 | { |
| 4105 | transport_instance * tp = doneaddr->transport; |
| 4106 | if (tp->max_parallel) |
| 4107 | enq_end(string_sprintf("tpt-serialize-%s", tp->name)); |
| 4108 | |
| 4109 | remote_post_process(doneaddr, LOG_MAIN, NULL, fallback); |
| 4110 | } |
| 4111 | } |
| 4112 | } |
| 4113 | |
| 4114 | static void |
| 4115 | rmt_dlv_checked_write(int fd, char id, char subid, void * buf, ssize_t size) |
| 4116 | { |
| 4117 | uschar pipe_header[PIPE_HEADER_SIZE+1]; |
| 4118 | size_t total_len = PIPE_HEADER_SIZE + size; |
| 4119 | |
| 4120 | struct iovec iov[2] = { |
| 4121 | { pipe_header, PIPE_HEADER_SIZE }, /* indication about the data to expect */ |
| 4122 | { buf, size } /* *the* data */ |
| 4123 | }; |
| 4124 | |
| 4125 | ssize_t ret; |
| 4126 | |
| 4127 | /* we assume that size can't get larger then BIG_BUFFER_SIZE which currently is set to 16k */ |
| 4128 | /* complain to log if someone tries with buffer sizes we can't handle*/ |
| 4129 | |
| 4130 | if (size > BIG_BUFFER_SIZE-1) |
| 4131 | { |
| 4132 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, |
| 4133 | "Failed writing transport result to pipe: can't handle buffers > %d bytes. truncating!\n", |
| 4134 | BIG_BUFFER_SIZE-1); |
| 4135 | size = BIG_BUFFER_SIZE; |
| 4136 | } |
| 4137 | |
| 4138 | /* Should we check that we do not write more than PIPE_BUF? What would |
| 4139 | that help? */ |
| 4140 | |
| 4141 | /* convert size to human readable string prepended by id and subid */ |
| 4142 | if (PIPE_HEADER_SIZE != snprintf(CS pipe_header, PIPE_HEADER_SIZE+1, "%c%c%05ld", |
| 4143 | id, subid, (long)size)) |
| 4144 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "header snprintf failed\n"); |
| 4145 | |
| 4146 | DEBUG(D_deliver) debug_printf("header write id:%c,subid:%c,size:%ld,final:%s\n", |
| 4147 | id, subid, (long)size, pipe_header); |
| 4148 | |
| 4149 | if ((ret = writev(fd, iov, 2)) != total_len) |
| 4150 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, |
| 4151 | "Failed writing transport result to pipe (%ld of %ld bytes): %s", |
| 4152 | (long)ret, (long)total_len, ret == -1 ? strerror(errno) : "short write"); |
| 4153 | } |
| 4154 | |
| 4155 | /************************************************* |
| 4156 | * Do remote deliveries * |
| 4157 | *************************************************/ |
| 4158 | |
| 4159 | /* This function is called to process the addresses in addr_remote. We must |
| 4160 | pick off the queue all addresses that have the same transport, remote |
| 4161 | destination, and errors address, and hand them to the transport in one go, |
| 4162 | subject to some configured limitations. If this is a run to continue delivering |
| 4163 | to an existing delivery channel, skip all but those addresses that can go to |
| 4164 | that channel. The skipped addresses just get deferred. |
| 4165 | |
| 4166 | If mua_wrapper is set, all addresses must be able to be sent in a single |
| 4167 | transaction. If not, this function yields FALSE. |
| 4168 | |
| 4169 | In Exim 4, remote deliveries are always done in separate processes, even |
| 4170 | if remote_max_parallel = 1 or if there's only one delivery to do. The reason |
| 4171 | is so that the base process can retain privilege. This makes the |
| 4172 | implementation of fallback transports feasible (though not initially done.) |
| 4173 | |
| 4174 | We create up to the configured number of subprocesses, each of which passes |
| 4175 | back the delivery state via a pipe. (However, when sending down an existing |
| 4176 | connection, remote_max_parallel is forced to 1.) |
| 4177 | |
| 4178 | Arguments: |
| 4179 | fallback TRUE if processing fallback hosts |
| 4180 | |
| 4181 | Returns: TRUE normally |
| 4182 | FALSE if mua_wrapper is set and the addresses cannot all be sent |
| 4183 | in one transaction |
| 4184 | */ |
| 4185 | |
| 4186 | static BOOL |
| 4187 | do_remote_deliveries(BOOL fallback) |
| 4188 | { |
| 4189 | int parmax; |
| 4190 | int poffset; |
| 4191 | |
| 4192 | parcount = 0; /* Number of executing subprocesses */ |
| 4193 | |
| 4194 | /* When sending down an existing channel, only do one delivery at a time. |
| 4195 | We use a local variable (parmax) to hold the maximum number of processes; |
| 4196 | this gets reduced from remote_max_parallel if we can't create enough pipes. */ |
| 4197 | |
| 4198 | if (continue_transport) remote_max_parallel = 1; |
| 4199 | parmax = remote_max_parallel; |
| 4200 | |
| 4201 | /* If the data for keeping a list of processes hasn't yet been |
| 4202 | set up, do so. */ |
| 4203 | |
| 4204 | if (!parlist) |
| 4205 | { |
| 4206 | parlist = store_get(remote_max_parallel * sizeof(pardata), FALSE); |
| 4207 | for (poffset = 0; poffset < remote_max_parallel; poffset++) |
| 4208 | parlist[poffset].pid = 0; |
| 4209 | } |
| 4210 | |
| 4211 | /* Now loop for each remote delivery */ |
| 4212 | |
| 4213 | for (int delivery_count = 0; addr_remote; delivery_count++) |
| 4214 | { |
| 4215 | pid_t pid; |
| 4216 | uid_t uid; |
| 4217 | gid_t gid; |
| 4218 | int pfd[2]; |
| 4219 | int address_count = 1; |
| 4220 | int address_count_max; |
| 4221 | BOOL multi_domain; |
| 4222 | BOOL use_initgroups; |
| 4223 | BOOL pipe_done = FALSE; |
| 4224 | transport_instance *tp; |
| 4225 | address_item **anchor = &addr_remote; |
| 4226 | address_item *addr = addr_remote; |
| 4227 | address_item *last = addr; |
| 4228 | address_item *next; |
| 4229 | uschar * panicmsg; |
| 4230 | uschar * serialize_key = NULL; |
| 4231 | |
| 4232 | /* Pull the first address right off the list. */ |
| 4233 | |
| 4234 | addr_remote = addr->next; |
| 4235 | addr->next = NULL; |
| 4236 | |
| 4237 | DEBUG(D_deliver|D_transport) |
| 4238 | debug_printf("--------> %s <--------\n", addr->address); |
| 4239 | |
| 4240 | /* If no transport has been set, there has been a big screw-up somewhere. */ |
| 4241 | |
| 4242 | if (!(tp = addr->transport)) |
| 4243 | { |
| 4244 | f.disable_logging = FALSE; /* Jic */ |
| 4245 | panicmsg = US"No transport set by router"; |
| 4246 | goto panic_continue; |
| 4247 | } |
| 4248 | |
| 4249 | /* Check that this base address hasn't previously been delivered to this |
| 4250 | transport. The check is necessary at this point to handle homonymic addresses |
| 4251 | correctly in cases where the pattern of redirection changes between delivery |
| 4252 | attempts. Non-homonymic previous delivery is detected earlier, at routing |
| 4253 | time. */ |
| 4254 | |
| 4255 | if (previously_transported(addr, FALSE)) continue; |
| 4256 | |
| 4257 | /* Force failure if the message is too big. */ |
| 4258 | |
| 4259 | if (tp->message_size_limit) |
| 4260 | { |
| 4261 | int rc = check_message_size(tp, addr); |
| 4262 | if (rc != OK) |
| 4263 | { |
| 4264 | addr->transport_return = rc; |
| 4265 | remote_post_process(addr, LOG_MAIN, NULL, fallback); |
| 4266 | continue; |
| 4267 | } |
| 4268 | } |
| 4269 | |
| 4270 | /* Get the flag which specifies whether the transport can handle different |
| 4271 | domains that nevertheless resolve to the same set of hosts. If it needs |
| 4272 | expanding, get variables set: $address_data, $domain_data, $localpart_data, |
| 4273 | $host, $host_address, $host_port. */ |
| 4274 | if (tp->expand_multi_domain) |
| 4275 | deliver_set_expansions(addr); |
| 4276 | |
| 4277 | if (exp_bool(addr, US"transport", tp->name, D_transport, |
| 4278 | US"multi_domain", tp->multi_domain, tp->expand_multi_domain, |
| 4279 | &multi_domain) != OK) |
| 4280 | { |
| 4281 | deliver_set_expansions(NULL); |
| 4282 | panicmsg = addr->message; |
| 4283 | goto panic_continue; |
| 4284 | } |
| 4285 | |
| 4286 | /* Get the maximum it can handle in one envelope, with zero meaning |
| 4287 | unlimited, which is forced for the MUA wrapper case. */ |
| 4288 | |
| 4289 | address_count_max = tp->max_addresses; |
| 4290 | if (address_count_max == 0 || mua_wrapper) address_count_max = 999999; |
| 4291 | |
| 4292 | |
| 4293 | /************************************************************************/ |
| 4294 | /***** This is slightly experimental code, but should be safe. *****/ |
| 4295 | |
| 4296 | /* The address_count_max value is the maximum number of addresses that the |
| 4297 | transport can send in one envelope. However, the transport must be capable of |
| 4298 | dealing with any number of addresses. If the number it gets exceeds its |
| 4299 | envelope limitation, it must send multiple copies of the message. This can be |
| 4300 | done over a single connection for SMTP, so uses less resources than making |
| 4301 | multiple connections. On the other hand, if remote_max_parallel is greater |
| 4302 | than one, it is perhaps a good idea to use parallel processing to move the |
| 4303 | message faster, even if that results in multiple simultaneous connections to |
| 4304 | the same host. |
| 4305 | |
| 4306 | How can we come to some compromise between these two ideals? What we do is to |
| 4307 | limit the number of addresses passed to a single instance of a transport to |
| 4308 | the greater of (a) its address limit (rcpt_max for SMTP) and (b) the total |
| 4309 | number of addresses routed to remote transports divided by |
| 4310 | remote_max_parallel. For example, if the message has 100 remote recipients, |
| 4311 | remote max parallel is 2, and rcpt_max is 10, we'd never send more than 50 at |
| 4312 | once. But if rcpt_max is 100, we could send up to 100. |
| 4313 | |
| 4314 | Of course, not all the remotely addresses in a message are going to go to the |
| 4315 | same set of hosts (except in smarthost configurations), so this is just a |
| 4316 | heuristic way of dividing up the work. |
| 4317 | |
| 4318 | Furthermore (1), because this may not be wanted in some cases, and also to |
| 4319 | cope with really pathological cases, there is also a limit to the number of |
| 4320 | messages that are sent over one connection. This is the same limit that is |
| 4321 | used when sending several different messages over the same connection. |
| 4322 | Continue_sequence is set when in this situation, to the number sent so |
| 4323 | far, including this message. |
| 4324 | |
| 4325 | Furthermore (2), when somebody explicitly sets the maximum value to 1, it |
| 4326 | is probably because they are using VERP, in which case they want to pass only |
| 4327 | one address at a time to the transport, in order to be able to use |
| 4328 | $local_part and $domain in constructing a new return path. We could test for |
| 4329 | the use of these variables, but as it is so likely they will be used when the |
| 4330 | maximum is 1, we don't bother. Just leave the value alone. */ |
| 4331 | |
| 4332 | if ( address_count_max != 1 |
| 4333 | && address_count_max < remote_delivery_count/remote_max_parallel |
| 4334 | ) |
| 4335 | { |
| 4336 | int new_max = remote_delivery_count/remote_max_parallel; |
| 4337 | int message_max = tp->connection_max_messages; |
| 4338 | if (connection_max_messages >= 0) message_max = connection_max_messages; |
| 4339 | message_max -= continue_sequence - 1; |
| 4340 | if (message_max > 0 && new_max > address_count_max * message_max) |
| 4341 | new_max = address_count_max * message_max; |
| 4342 | address_count_max = new_max; |
| 4343 | } |
| 4344 | |
| 4345 | /************************************************************************/ |
| 4346 | |
| 4347 | |
| 4348 | /* Pick off all addresses which have the same transport, errors address, |
| 4349 | destination, and extra headers. In some cases they point to the same host |
| 4350 | list, but we also need to check for identical host lists generated from |
| 4351 | entirely different domains. The host list pointers can be NULL in the case |
| 4352 | where the hosts are defined in the transport. There is also a configured |
| 4353 | maximum limit of addresses that can be handled at once (see comments above |
| 4354 | for how it is computed). |
| 4355 | If the transport does not handle multiple domains, enforce that also, |
| 4356 | and if it might need a per-address check for this, re-evaluate it. |
| 4357 | */ |
| 4358 | |
| 4359 | while ((next = *anchor) && address_count < address_count_max) |
| 4360 | { |
| 4361 | BOOL md; |
| 4362 | if ( (multi_domain || Ustrcmp(next->domain, addr->domain) == 0) |
| 4363 | && tp == next->transport |
| 4364 | && same_hosts(next->host_list, addr->host_list) |
| 4365 | && same_strings(next->prop.errors_address, addr->prop.errors_address) |
| 4366 | && same_headers(next->prop.extra_headers, addr->prop.extra_headers) |
| 4367 | && same_ugid(tp, next, addr) |
| 4368 | && ( next->prop.remove_headers == addr->prop.remove_headers |
| 4369 | || ( next->prop.remove_headers |
| 4370 | && addr->prop.remove_headers |
| 4371 | && Ustrcmp(next->prop.remove_headers, addr->prop.remove_headers) == 0 |
| 4372 | ) ) |
| 4373 | && ( !multi_domain |
| 4374 | || ( ( |
| 4375 | (void)(!tp->expand_multi_domain || ((void)deliver_set_expansions(next), 1)), |
| 4376 | exp_bool(addr, |
| 4377 | US"transport", next->transport->name, D_transport, |
| 4378 | US"multi_domain", next->transport->multi_domain, |
| 4379 | next->transport->expand_multi_domain, &md) == OK |
| 4380 | ) |
| 4381 | && md |
| 4382 | ) ) ) |
| 4383 | { |
| 4384 | *anchor = next->next; |
| 4385 | next->next = NULL; |
| 4386 | next->first = addr; /* remember top one (for retry processing) */ |
| 4387 | last->next = next; |
| 4388 | last = next; |
| 4389 | address_count++; |
| 4390 | } |
| 4391 | else anchor = &(next->next); |
| 4392 | deliver_set_expansions(NULL); |
| 4393 | } |
| 4394 | |
| 4395 | /* If we are acting as an MUA wrapper, all addresses must go in a single |
| 4396 | transaction. If not, put them back on the chain and yield FALSE. */ |
| 4397 | |
| 4398 | if (mua_wrapper && addr_remote) |
| 4399 | { |
| 4400 | last->next = addr_remote; |
| 4401 | addr_remote = addr; |
| 4402 | return FALSE; |
| 4403 | } |
| 4404 | |
| 4405 | /* If the transport is limited for parallellism, enforce that here. |
| 4406 | The hints DB entry is decremented in par_reduce(), when we reap the |
| 4407 | transport process. */ |
| 4408 | |
| 4409 | if (tpt_parallel_check(tp, addr, &serialize_key)) |
| 4410 | if ((panicmsg = expand_string_message)) |
| 4411 | goto panic_continue; |
| 4412 | else |
| 4413 | continue; /* Loop for the next set of addresses. */ |
| 4414 | |
| 4415 | /* Set up the expansion variables for this set of addresses */ |
| 4416 | |
| 4417 | deliver_set_expansions(addr); |
| 4418 | |
| 4419 | /* Ensure any transport-set auth info is fresh */ |
| 4420 | addr->authenticator = addr->auth_id = addr->auth_sndr = NULL; |
| 4421 | |
| 4422 | /* Compute the return path, expanding a new one if required. The old one |
| 4423 | must be set first, as it might be referred to in the expansion. */ |
| 4424 | |
| 4425 | if(addr->prop.errors_address) |
| 4426 | return_path = addr->prop.errors_address; |
| 4427 | #ifdef EXPERIMENTAL_SRS |
| 4428 | else if(addr->prop.srs_sender) |
| 4429 | return_path = addr->prop.srs_sender; |
| 4430 | #endif |
| 4431 | else |
| 4432 | return_path = sender_address; |
| 4433 | |
| 4434 | if (tp->return_path) |
| 4435 | { |
| 4436 | uschar *new_return_path = expand_string(tp->return_path); |
| 4437 | if (new_return_path) |
| 4438 | return_path = new_return_path; |
| 4439 | else if (!f.expand_string_forcedfail) |
| 4440 | { |
| 4441 | panicmsg = string_sprintf("Failed to expand return path \"%s\": %s", |
| 4442 | tp->return_path, expand_string_message); |
| 4443 | goto enq_continue; |
| 4444 | } |
| 4445 | } |
| 4446 | |
| 4447 | /* Find the uid, gid, and use_initgroups setting for this transport. Failure |
| 4448 | logs and sets up error messages, so we just post-process and continue with |
| 4449 | the next address. */ |
| 4450 | |
| 4451 | if (!findugid(addr, tp, &uid, &gid, &use_initgroups)) |
| 4452 | { |
| 4453 | panicmsg = NULL; |
| 4454 | goto enq_continue; |
| 4455 | } |
| 4456 | |
| 4457 | /* If this transport has a setup function, call it now so that it gets |
| 4458 | run in this process and not in any subprocess. That way, the results of |
| 4459 | any setup that are retained by the transport can be reusable. One of the |
| 4460 | things the setup does is to set the fallback host lists in the addresses. |
| 4461 | That is why it is called at this point, before the continue delivery |
| 4462 | processing, because that might use the fallback hosts. */ |
| 4463 | |
| 4464 | if (tp->setup) |
| 4465 | (void)((tp->setup)(addr->transport, addr, NULL, uid, gid, NULL)); |
| 4466 | |
| 4467 | /* If we have a connection still open from a verify stage (lazy-close) |
| 4468 | treat it as if it is a continued connection (apart from the counter used |
| 4469 | for the log line mark). */ |
| 4470 | |
| 4471 | if (cutthrough.cctx.sock >= 0 && cutthrough.callout_hold_only) |
| 4472 | { |
| 4473 | DEBUG(D_deliver) |
| 4474 | debug_printf("lazy-callout-close: have conn still open from verification\n"); |
| 4475 | continue_transport = cutthrough.transport; |
| 4476 | continue_hostname = string_copy(cutthrough.host.name); |
| 4477 | continue_host_address = string_copy(cutthrough.host.address); |
| 4478 | continue_sequence = 1; |
| 4479 | sending_ip_address = cutthrough.snd_ip; |
| 4480 | sending_port = cutthrough.snd_port; |
| 4481 | smtp_peer_options = cutthrough.peer_options; |
| 4482 | } |
| 4483 | |
| 4484 | /* If this is a run to continue delivery down an already-established |
| 4485 | channel, check that this set of addresses matches the transport and |
| 4486 | the channel. If it does not, defer the addresses. If a host list exists, |
| 4487 | we must check that the continue host is on the list. Otherwise, the |
| 4488 | host is set in the transport. */ |
| 4489 | |
| 4490 | f.continue_more = FALSE; /* In case got set for the last lot */ |
| 4491 | if (continue_transport) |
| 4492 | { |
| 4493 | BOOL ok = Ustrcmp(continue_transport, tp->name) == 0; |
| 4494 | |
| 4495 | /* If the transport is about to override the host list do not check |
| 4496 | it here but take the cost of running the transport process to discover |
| 4497 | if the continued_hostname connection is suitable. This is a layering |
| 4498 | violation which is unfortunate as it requires we haul in the smtp |
| 4499 | include file. */ |
| 4500 | |
| 4501 | if (ok) |
| 4502 | { |
| 4503 | smtp_transport_options_block * ob; |
| 4504 | |
| 4505 | if ( !( Ustrcmp(tp->info->driver_name, "smtp") == 0 |
| 4506 | && (ob = (smtp_transport_options_block *)tp->options_block) |
| 4507 | && ob->hosts_override && ob->hosts |
| 4508 | ) |
| 4509 | && addr->host_list |
| 4510 | ) |
| 4511 | { |
| 4512 | ok = FALSE; |
| 4513 | for (host_item * h = addr->host_list; h; h = h->next) |
| 4514 | if (Ustrcmp(h->name, continue_hostname) == 0) |
| 4515 | /*XXX should also check port here */ |
| 4516 | { ok = TRUE; break; } |
| 4517 | } |
| 4518 | } |
| 4519 | |
| 4520 | /* Addresses not suitable; defer or queue for fallback hosts (which |
| 4521 | might be the continue host) and skip to next address. */ |
| 4522 | |
| 4523 | if (!ok) |
| 4524 | { |
| 4525 | DEBUG(D_deliver) debug_printf("not suitable for continue_transport (%s)\n", |
| 4526 | Ustrcmp(continue_transport, tp->name) != 0 |
| 4527 | ? string_sprintf("tpt %s vs %s", continue_transport, tp->name) |
| 4528 | : string_sprintf("no host matching %s", continue_hostname)); |
| 4529 | if (serialize_key) enq_end(serialize_key); |
| 4530 | |
| 4531 | if (addr->fallback_hosts && !fallback) |
| 4532 | { |
| 4533 | for (next = addr; ; next = next->next) |
| 4534 | { |
| 4535 | next->host_list = next->fallback_hosts; |
| 4536 | DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", next->address); |
| 4537 | if (!next->next) break; |
| 4538 | } |
| 4539 | next->next = addr_fallback; |
| 4540 | addr_fallback = addr; |
| 4541 | } |
| 4542 | |
| 4543 | else |
| 4544 | { |
| 4545 | for (next = addr; ; next = next->next) |
| 4546 | { |
| 4547 | DEBUG(D_deliver) debug_printf(" %s to def list\n", next->address); |
| 4548 | if (!next->next) break; |
| 4549 | } |
| 4550 | next->next = addr_defer; |
| 4551 | addr_defer = addr; |
| 4552 | } |
| 4553 | |
| 4554 | continue; |
| 4555 | } |
| 4556 | |
| 4557 | /* Set a flag indicating whether there are further addresses that list |
| 4558 | the continued host. This tells the transport to leave the channel open, |
| 4559 | but not to pass it to another delivery process. We'd like to do that |
| 4560 | for non-continue_transport cases too but the knowlege of which host is |
| 4561 | connected to is too hard to manage. Perhaps we need a finer-grain |
| 4562 | interface to the transport. */ |
| 4563 | |
| 4564 | for (next = addr_remote; next && !f.continue_more; next = next->next) |
| 4565 | for (host_item * h = next->host_list; h; h = h->next) |
| 4566 | if (Ustrcmp(h->name, continue_hostname) == 0) |
| 4567 | { f.continue_more = TRUE; break; } |
| 4568 | } |
| 4569 | |
| 4570 | /* The transports set up the process info themselves as they may connect |
| 4571 | to more than one remote machine. They also have to set up the filter |
| 4572 | arguments, if required, so that the host name and address are available |
| 4573 | for expansion. */ |
| 4574 | |
| 4575 | transport_filter_argv = NULL; |
| 4576 | |
| 4577 | /* Create the pipe for inter-process communication. If pipe creation |
| 4578 | fails, it is probably because the value of remote_max_parallel is so |
| 4579 | large that too many file descriptors for pipes have been created. Arrange |
| 4580 | to wait for a process to finish, and then try again. If we still can't |
| 4581 | create a pipe when all processes have finished, break the retry loop. */ |
| 4582 | |
| 4583 | while (!pipe_done) |
| 4584 | { |
| 4585 | if (pipe(pfd) == 0) pipe_done = TRUE; |
| 4586 | else if (parcount > 0) parmax = parcount; |
| 4587 | else break; |
| 4588 | |
| 4589 | /* We need to make the reading end of the pipe non-blocking. There are |
| 4590 | two different options for this. Exim is cunningly (I hope!) coded so |
| 4591 | that it can use either of them, though it prefers O_NONBLOCK, which |
| 4592 | distinguishes between EOF and no-more-data. */ |
| 4593 | |
| 4594 | /* The data appears in a timely manner and we already did a select on |
| 4595 | all pipes, so I do not see a reason to use non-blocking IO here |
| 4596 | |
| 4597 | #ifdef O_NONBLOCK |
| 4598 | (void)fcntl(pfd[pipe_read], F_SETFL, O_NONBLOCK); |
| 4599 | #else |
| 4600 | (void)fcntl(pfd[pipe_read], F_SETFL, O_NDELAY); |
| 4601 | #endif |
| 4602 | */ |
| 4603 | |
| 4604 | /* If the maximum number of subprocesses already exist, wait for a process |
| 4605 | to finish. If we ran out of file descriptors, parmax will have been reduced |
| 4606 | from its initial value of remote_max_parallel. */ |
| 4607 | |
| 4608 | par_reduce(parmax - 1, fallback); |
| 4609 | } |
| 4610 | |
| 4611 | /* If we failed to create a pipe and there were no processes to wait |
| 4612 | for, we have to give up on this one. Do this outside the above loop |
| 4613 | so that we can continue the main loop. */ |
| 4614 | |
| 4615 | if (!pipe_done) |
| 4616 | { |
| 4617 | panicmsg = string_sprintf("unable to create pipe: %s", strerror(errno)); |
| 4618 | goto enq_continue; |
| 4619 | } |
| 4620 | |
| 4621 | /* Find a free slot in the pardata list. Must do this after the possible |
| 4622 | waiting for processes to finish, because a terminating process will free |
| 4623 | up a slot. */ |
| 4624 | |
| 4625 | for (poffset = 0; poffset < remote_max_parallel; poffset++) |
| 4626 | if (parlist[poffset].pid == 0) |
| 4627 | break; |
| 4628 | |
| 4629 | /* If there isn't one, there has been a horrible disaster. */ |
| 4630 | |
| 4631 | if (poffset >= remote_max_parallel) |
| 4632 | { |
| 4633 | (void)close(pfd[pipe_write]); |
| 4634 | (void)close(pfd[pipe_read]); |
| 4635 | panicmsg = US"Unexpectedly no free subprocess slot"; |
| 4636 | goto enq_continue; |
| 4637 | } |
| 4638 | |
| 4639 | /* Now fork a subprocess to do the remote delivery, but before doing so, |
| 4640 | ensure that any cached resources are released so as not to interfere with |
| 4641 | what happens in the subprocess. */ |
| 4642 | |
| 4643 | search_tidyup(); |
| 4644 | |
| 4645 | if ((pid = fork()) == 0) |
| 4646 | { |
| 4647 | int fd = pfd[pipe_write]; |
| 4648 | host_item *h; |
| 4649 | |
| 4650 | /* Setting this global in the subprocess means we need never clear it */ |
| 4651 | transport_name = tp->name; |
| 4652 | |
| 4653 | /* There are weird circumstances in which logging is disabled */ |
| 4654 | f.disable_logging = tp->disable_logging; |
| 4655 | |
| 4656 | /* Show pids on debug output if parallelism possible */ |
| 4657 | |
| 4658 | if (parmax > 1 && (parcount > 0 || addr_remote)) |
| 4659 | { |
| 4660 | DEBUG(D_any|D_v) debug_selector |= D_pid; |
| 4661 | DEBUG(D_deliver) debug_printf("Remote delivery process started\n"); |
| 4662 | } |
| 4663 | |
| 4664 | /* Reset the random number generator, so different processes don't all |
| 4665 | have the same sequence. In the test harness we want different, but |
| 4666 | predictable settings for each delivery process, so do something explicit |
| 4667 | here rather they rely on the fixed reset in the random number function. */ |
| 4668 | |
| 4669 | random_seed = f.running_in_test_harness ? 42 + 2*delivery_count : 0; |
| 4670 | |
| 4671 | /* Set close-on-exec on the pipe so that it doesn't get passed on to |
| 4672 | a new process that may be forked to do another delivery down the same |
| 4673 | SMTP connection. */ |
| 4674 | |
| 4675 | (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC); |
| 4676 | |
| 4677 | /* Close open file descriptors for the pipes of other processes |
| 4678 | that are running in parallel. */ |
| 4679 | |
| 4680 | for (poffset = 0; poffset < remote_max_parallel; poffset++) |
| 4681 | if (parlist[poffset].pid != 0) (void)close(parlist[poffset].fd); |
| 4682 | |
| 4683 | /* This process has inherited a copy of the file descriptor |
| 4684 | for the data file, but its file pointer is shared with all the |
| 4685 | other processes running in parallel. Therefore, we have to re-open |
| 4686 | the file in order to get a new file descriptor with its own |
| 4687 | file pointer. We don't need to lock it, as the lock is held by |
| 4688 | the parent process. There doesn't seem to be any way of doing |
| 4689 | a dup-with-new-file-pointer. */ |
| 4690 | |
| 4691 | (void)close(deliver_datafile); |
| 4692 | { |
| 4693 | uschar * fname = spool_fname(US"input", message_subdir, message_id, US"-D"); |
| 4694 | |
| 4695 | if ((deliver_datafile = Uopen(fname, |
| 4696 | #ifdef O_CLOEXEC |
| 4697 | O_CLOEXEC | |
| 4698 | #endif |
| 4699 | O_RDWR | O_APPEND, 0)) < 0) |
| 4700 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to reopen %s for remote " |
| 4701 | "parallel delivery: %s", fname, strerror(errno)); |
| 4702 | } |
| 4703 | |
| 4704 | /* Set the close-on-exec flag */ |
| 4705 | #ifndef O_CLOEXEC |
| 4706 | (void)fcntl(deliver_datafile, F_SETFD, fcntl(deliver_datafile, F_GETFD) | |
| 4707 | FD_CLOEXEC); |
| 4708 | #endif |
| 4709 | |
| 4710 | /* Set the uid/gid of this process; bombs out on failure. */ |
| 4711 | |
| 4712 | exim_setugid(uid, gid, use_initgroups, |
| 4713 | string_sprintf("remote delivery to %s with transport=%s", |
| 4714 | addr->address, tp->name)); |
| 4715 | |
| 4716 | /* Close the unwanted half of this process' pipe, set the process state, |
| 4717 | and run the transport. Afterwards, transport_count will contain the number |
| 4718 | of bytes written. */ |
| 4719 | |
| 4720 | (void)close(pfd[pipe_read]); |
| 4721 | set_process_info("delivering %s using %s", message_id, tp->name); |
| 4722 | debug_print_string(tp->debug_string); |
| 4723 | if (!(tp->info->code)(addr->transport, addr)) replicate_status(addr); |
| 4724 | |
| 4725 | set_process_info("delivering %s (just run %s for %s%s in subprocess)", |
| 4726 | message_id, tp->name, addr->address, addr->next ? ", ..." : ""); |
| 4727 | |
| 4728 | /* Ensure any cached resources that we used are now released */ |
| 4729 | |
| 4730 | search_tidyup(); |
| 4731 | |
| 4732 | /* Pass the result back down the pipe. This is a lot more information |
| 4733 | than is needed for a local delivery. We have to send back the error |
| 4734 | status for each address, the usability status for each host that is |
| 4735 | flagged as unusable, and all the retry items. When TLS is in use, we |
| 4736 | send also the cipher and peerdn information. Each type of information |
| 4737 | is flagged by an identifying byte, and is then in a fixed format (with |
| 4738 | strings terminated by zeros), and there is a final terminator at the |
| 4739 | end. The host information and retry information is all attached to |
| 4740 | the first address, so that gets sent at the start. */ |
| 4741 | |
| 4742 | /* Host unusability information: for most success cases this will |
| 4743 | be null. */ |
| 4744 | |
| 4745 | for (h = addr->host_list; h; h = h->next) |
| 4746 | { |
| 4747 | if (!h->address || h->status < hstatus_unusable) continue; |
| 4748 | sprintf(CS big_buffer, "%c%c%s", h->status, h->why, h->address); |
| 4749 | rmt_dlv_checked_write(fd, 'H', '0', big_buffer, Ustrlen(big_buffer+2) + 3); |
| 4750 | } |
| 4751 | |
| 4752 | /* The number of bytes written. This is the same for each address. Even |
| 4753 | if we sent several copies of the message down the same connection, the |
| 4754 | size of each one is the same, and it's that value we have got because |
| 4755 | transport_count gets reset before calling transport_write_message(). */ |
| 4756 | |
| 4757 | memcpy(big_buffer, &transport_count, sizeof(transport_count)); |
| 4758 | rmt_dlv_checked_write(fd, 'S', '0', big_buffer, sizeof(transport_count)); |
| 4759 | |
| 4760 | /* Information about what happened to each address. Four item types are |
| 4761 | used: an optional 'X' item first, for TLS information, then an optional "C" |
| 4762 | item for any client-auth info followed by 'R' items for any retry settings, |
| 4763 | and finally an 'A' item for the remaining data. */ |
| 4764 | |
| 4765 | for(; addr; addr = addr->next) |
| 4766 | { |
| 4767 | uschar *ptr; |
| 4768 | |
| 4769 | /* The certificate verification status goes into the flags */ |
| 4770 | if (tls_out.certificate_verified) setflag(addr, af_cert_verified); |
| 4771 | #ifdef SUPPORT_DANE |
| 4772 | if (tls_out.dane_verified) setflag(addr, af_dane_verified); |
| 4773 | #endif |
| 4774 | # ifdef EXPERIMENTAL_TLS_RESUME |
| 4775 | if (tls_out.resumption & RESUME_USED) setflag(addr, af_tls_resume); |
| 4776 | # endif |
| 4777 | |
| 4778 | /* Use an X item only if there's something to send */ |
| 4779 | #ifndef DISABLE_TLS |
| 4780 | if (addr->cipher) |
| 4781 | { |
| 4782 | ptr = big_buffer + sprintf(CS big_buffer, "%.128s", addr->cipher) + 1; |
| 4783 | if (!addr->peerdn) |
| 4784 | *ptr++ = 0; |
| 4785 | else |
| 4786 | ptr += sprintf(CS ptr, "%.512s", addr->peerdn) + 1; |
| 4787 | |
| 4788 | rmt_dlv_checked_write(fd, 'X', '1', big_buffer, ptr - big_buffer); |
| 4789 | } |
| 4790 | else if (continue_proxy_cipher) |
| 4791 | { |
| 4792 | ptr = big_buffer + sprintf(CS big_buffer, "%.128s", continue_proxy_cipher) + 1; |
| 4793 | *ptr++ = 0; |
| 4794 | rmt_dlv_checked_write(fd, 'X', '1', big_buffer, ptr - big_buffer); |
| 4795 | } |
| 4796 | |
| 4797 | if (addr->peercert) |
| 4798 | { |
| 4799 | ptr = big_buffer; |
| 4800 | if (tls_export_cert(ptr, big_buffer_size-2, addr->peercert)) |
| 4801 | while(*ptr++); |
| 4802 | else |
| 4803 | *ptr++ = 0; |
| 4804 | rmt_dlv_checked_write(fd, 'X', '2', big_buffer, ptr - big_buffer); |
| 4805 | } |
| 4806 | if (addr->ourcert) |
| 4807 | { |
| 4808 | ptr = big_buffer; |
| 4809 | if (tls_export_cert(ptr, big_buffer_size-2, addr->ourcert)) |
| 4810 | while(*ptr++); |
| 4811 | else |
| 4812 | *ptr++ = 0; |
| 4813 | rmt_dlv_checked_write(fd, 'X', '3', big_buffer, ptr - big_buffer); |
| 4814 | } |
| 4815 | # ifndef DISABLE_OCSP |
| 4816 | if (addr->ocsp > OCSP_NOT_REQ) |
| 4817 | { |
| 4818 | ptr = big_buffer + sprintf(CS big_buffer, "%c", addr->ocsp + '0') + 1; |
| 4819 | rmt_dlv_checked_write(fd, 'X', '4', big_buffer, ptr - big_buffer); |
| 4820 | } |
| 4821 | # endif |
| 4822 | #endif /*DISABLE_TLS*/ |
| 4823 | |
| 4824 | if (client_authenticator) |
| 4825 | { |
| 4826 | ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticator) + 1; |
| 4827 | rmt_dlv_checked_write(fd, 'C', '1', big_buffer, ptr - big_buffer); |
| 4828 | } |
| 4829 | if (client_authenticated_id) |
| 4830 | { |
| 4831 | ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticated_id) + 1; |
| 4832 | rmt_dlv_checked_write(fd, 'C', '2', big_buffer, ptr - big_buffer); |
| 4833 | } |
| 4834 | if (client_authenticated_sender) |
| 4835 | { |
| 4836 | ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticated_sender) + 1; |
| 4837 | rmt_dlv_checked_write(fd, 'C', '3', big_buffer, ptr - big_buffer); |
| 4838 | } |
| 4839 | |
| 4840 | #ifndef DISABLE_PRDR |
| 4841 | if (testflag(addr, af_prdr_used)) |
| 4842 | rmt_dlv_checked_write(fd, 'P', '0', NULL, 0); |
| 4843 | #endif |
| 4844 | |
| 4845 | if (testflag(addr, af_pipelining)) |
| 4846 | #ifndef DISABLE_PIPE_CONNECT |
| 4847 | if (testflag(addr, af_early_pipe)) |
| 4848 | rmt_dlv_checked_write(fd, 'L', '2', NULL, 0); |
| 4849 | else |
| 4850 | #endif |
| 4851 | rmt_dlv_checked_write(fd, 'L', '1', NULL, 0); |
| 4852 | |
| 4853 | if (testflag(addr, af_chunking_used)) |
| 4854 | rmt_dlv_checked_write(fd, 'K', '0', NULL, 0); |
| 4855 | |
| 4856 | if (testflag(addr, af_tcp_fastopen_conn)) |
| 4857 | rmt_dlv_checked_write(fd, 'T', |
| 4858 | testflag(addr, af_tcp_fastopen) ? testflag(addr, af_tcp_fastopen_data) |
| 4859 | ? '2' : '1' : '0', |
| 4860 | NULL, 0); |
| 4861 | |
| 4862 | memcpy(big_buffer, &addr->dsn_aware, sizeof(addr->dsn_aware)); |
| 4863 | rmt_dlv_checked_write(fd, 'D', '0', big_buffer, sizeof(addr->dsn_aware)); |
| 4864 | |
| 4865 | /* Retry information: for most success cases this will be null. */ |
| 4866 | |
| 4867 | for (retry_item * r = addr->retries; r; r = r->next) |
| 4868 | { |
| 4869 | sprintf(CS big_buffer, "%c%.500s", r->flags, r->key); |
| 4870 | ptr = big_buffer + Ustrlen(big_buffer+2) + 3; |
| 4871 | memcpy(ptr, &r->basic_errno, sizeof(r->basic_errno)); |
| 4872 | ptr += sizeof(r->basic_errno); |
| 4873 | memcpy(ptr, &r->more_errno, sizeof(r->more_errno)); |
| 4874 | ptr += sizeof(r->more_errno); |
| 4875 | if (!r->message) *ptr++ = 0; else |
| 4876 | { |
| 4877 | sprintf(CS ptr, "%.512s", r->message); |
| 4878 | while(*ptr++); |
| 4879 | } |
| 4880 | rmt_dlv_checked_write(fd, 'R', '0', big_buffer, ptr - big_buffer); |
| 4881 | } |
| 4882 | |
| 4883 | #ifdef SUPPORT_SOCKS |
| 4884 | if (LOGGING(proxy) && proxy_session) |
| 4885 | { |
| 4886 | ptr = big_buffer; |
| 4887 | if (proxy_local_address) |
| 4888 | { |
| 4889 | DEBUG(D_deliver) debug_printf("proxy_local_address '%s'\n", proxy_local_address); |
| 4890 | ptr = big_buffer + sprintf(CS ptr, "%.128s", proxy_local_address) + 1; |
| 4891 | DEBUG(D_deliver) debug_printf("proxy_local_port %d\n", proxy_local_port); |
| 4892 | memcpy(ptr, &proxy_local_port, sizeof(proxy_local_port)); |
| 4893 | ptr += sizeof(proxy_local_port); |
| 4894 | } |
| 4895 | else |
| 4896 | *ptr++ = '\0'; |
| 4897 | rmt_dlv_checked_write(fd, 'A', '2', big_buffer, ptr - big_buffer); |
| 4898 | } |
| 4899 | #endif |
| 4900 | |
| 4901 | #ifdef EXPERIMENTAL_DSN_INFO |
| 4902 | /*um, are they really per-addr? Other per-conn stuff is not (auth, tls). But host_used is! */ |
| 4903 | if (addr->smtp_greeting) |
| 4904 | { |
| 4905 | DEBUG(D_deliver) debug_printf("smtp_greeting '%s'\n", addr->smtp_greeting); |
| 4906 | ptr = big_buffer + sprintf(CS big_buffer, "%.128s", addr->smtp_greeting) + 1; |
| 4907 | if (addr->helo_response) |
| 4908 | { |
| 4909 | DEBUG(D_deliver) debug_printf("helo_response '%s'\n", addr->helo_response); |
| 4910 | ptr += sprintf(CS ptr, "%.128s", addr->helo_response) + 1; |
| 4911 | } |
| 4912 | else |
| 4913 | *ptr++ = '\0'; |
| 4914 | rmt_dlv_checked_write(fd, 'A', '1', big_buffer, ptr - big_buffer); |
| 4915 | } |
| 4916 | #endif |
| 4917 | |
| 4918 | /* The rest of the information goes in an 'A0' item. */ |
| 4919 | |
| 4920 | sprintf(CS big_buffer, "%c%c", addr->transport_return, addr->special_action); |
| 4921 | ptr = big_buffer + 2; |
| 4922 | memcpy(ptr, &addr->basic_errno, sizeof(addr->basic_errno)); |
| 4923 | ptr += sizeof(addr->basic_errno); |
| 4924 | memcpy(ptr, &addr->more_errno, sizeof(addr->more_errno)); |
| 4925 | ptr += sizeof(addr->more_errno); |
| 4926 | memcpy(ptr, &addr->delivery_time, sizeof(addr->delivery_time)); |
| 4927 | ptr += sizeof(addr->delivery_time); |
| 4928 | memcpy(ptr, &addr->flags, sizeof(addr->flags)); |
| 4929 | ptr += sizeof(addr->flags); |
| 4930 | |
| 4931 | if (!addr->message) *ptr++ = 0; else |
| 4932 | ptr += sprintf(CS ptr, "%.1024s", addr->message) + 1; |
| 4933 | |
| 4934 | if (!addr->user_message) *ptr++ = 0; else |
| 4935 | ptr += sprintf(CS ptr, "%.1024s", addr->user_message) + 1; |
| 4936 | |
| 4937 | if (!addr->host_used) *ptr++ = 0; else |
| 4938 | { |
| 4939 | ptr += sprintf(CS ptr, "%.256s", addr->host_used->name) + 1; |
| 4940 | ptr += sprintf(CS ptr, "%.64s", addr->host_used->address) + 1; |
| 4941 | memcpy(ptr, &addr->host_used->port, sizeof(addr->host_used->port)); |
| 4942 | ptr += sizeof(addr->host_used->port); |
| 4943 | |
| 4944 | /* DNS lookup status */ |
| 4945 | *ptr++ = addr->host_used->dnssec==DS_YES ? '2' |
| 4946 | : addr->host_used->dnssec==DS_NO ? '1' : '0'; |
| 4947 | |
| 4948 | } |
| 4949 | rmt_dlv_checked_write(fd, 'A', '0', big_buffer, ptr - big_buffer); |
| 4950 | } |
| 4951 | |
| 4952 | /* Local interface address/port */ |
| 4953 | #ifdef EXPERIMENTAL_DSN_INFO |
| 4954 | if (sending_ip_address) |
| 4955 | #else |
| 4956 | if (LOGGING(incoming_interface) && sending_ip_address) |
| 4957 | #endif |
| 4958 | { |
| 4959 | uschar * ptr; |
| 4960 | ptr = big_buffer + sprintf(CS big_buffer, "%.128s", sending_ip_address) + 1; |
| 4961 | ptr += sprintf(CS ptr, "%d", sending_port) + 1; |
| 4962 | rmt_dlv_checked_write(fd, 'I', '0', big_buffer, ptr - big_buffer); |
| 4963 | } |
| 4964 | |
| 4965 | /* Add termination flag, close the pipe, and that's it. The character |
| 4966 | after 'Z' indicates whether continue_transport is now NULL or not. |
| 4967 | A change from non-NULL to NULL indicates a problem with a continuing |
| 4968 | connection. */ |
| 4969 | |
| 4970 | big_buffer[0] = continue_transport ? '1' : '0'; |
| 4971 | rmt_dlv_checked_write(fd, 'Z', '0', big_buffer, 1); |
| 4972 | (void)close(fd); |
| 4973 | exit(EXIT_SUCCESS); |
| 4974 | } |
| 4975 | |
| 4976 | /* Back in the mainline: close the unwanted half of the pipe. */ |
| 4977 | |
| 4978 | (void)close(pfd[pipe_write]); |
| 4979 | |
| 4980 | /* If we have a connection still open from a verify stage (lazy-close) |
| 4981 | release its TLS library context (if any) as responsibility was passed to |
| 4982 | the delivery child process. */ |
| 4983 | |
| 4984 | if (cutthrough.cctx.sock >= 0 && cutthrough.callout_hold_only) |
| 4985 | { |
| 4986 | #ifndef DISABLE_TLS |
| 4987 | if (cutthrough.is_tls) |
| 4988 | tls_close(cutthrough.cctx.tls_ctx, TLS_NO_SHUTDOWN); |
| 4989 | #endif |
| 4990 | (void) close(cutthrough.cctx.sock); |
| 4991 | release_cutthrough_connection(US"passed to transport proc"); |
| 4992 | } |
| 4993 | |
| 4994 | /* Fork failed; defer with error message */ |
| 4995 | |
| 4996 | if (pid == -1) |
| 4997 | { |
| 4998 | (void)close(pfd[pipe_read]); |
| 4999 | panicmsg = string_sprintf("fork failed for remote delivery to %s: %s", |
| 5000 | addr->domain, strerror(errno)); |
| 5001 | goto enq_continue; |
| 5002 | } |
| 5003 | |
| 5004 | /* Fork succeeded; increment the count, and remember relevant data for |
| 5005 | when the process finishes. */ |
| 5006 | |
| 5007 | parcount++; |
| 5008 | parlist[poffset].addrlist = parlist[poffset].addr = addr; |
| 5009 | parlist[poffset].pid = pid; |
| 5010 | parlist[poffset].fd = pfd[pipe_read]; |
| 5011 | parlist[poffset].done = FALSE; |
| 5012 | parlist[poffset].msg = NULL; |
| 5013 | parlist[poffset].return_path = return_path; |
| 5014 | |
| 5015 | /* If the process we've just started is sending a message down an existing |
| 5016 | channel, wait for it now. This ensures that only one such process runs at |
| 5017 | once, whatever the value of remote_max parallel. Otherwise, we might try to |
| 5018 | send two or more messages simultaneously down the same channel. This could |
| 5019 | happen if there are different domains that include the same host in otherwise |
| 5020 | different host lists. |
| 5021 | |
| 5022 | Also, if the transport closes down the channel, this information gets back |
| 5023 | (continue_transport gets set to NULL) before we consider any other addresses |
| 5024 | in this message. */ |
| 5025 | |
| 5026 | if (continue_transport) par_reduce(0, fallback); |
| 5027 | |
| 5028 | /* Otherwise, if we are running in the test harness, wait a bit, to let the |
| 5029 | newly created process get going before we create another process. This should |
| 5030 | ensure repeatability in the tests. Wait long enough for most cases to complete |
| 5031 | the transport. */ |
| 5032 | |
| 5033 | else testharness_pause_ms(600); |
| 5034 | |
| 5035 | continue; |
| 5036 | |
| 5037 | enq_continue: |
| 5038 | if (serialize_key) enq_end(serialize_key); |
| 5039 | panic_continue: |
| 5040 | remote_post_process(addr, LOG_MAIN|LOG_PANIC, panicmsg, fallback); |
| 5041 | continue; |
| 5042 | } |
| 5043 | |
| 5044 | /* Reached the end of the list of addresses. Wait for all the subprocesses that |
| 5045 | are still running and post-process their addresses. */ |
| 5046 | |
| 5047 | par_reduce(0, fallback); |
| 5048 | return TRUE; |
| 5049 | } |
| 5050 | |
| 5051 | |
| 5052 | |
| 5053 | |
| 5054 | /************************************************* |
| 5055 | * Split an address into local part and domain * |
| 5056 | *************************************************/ |
| 5057 | |
| 5058 | /* This function initializes an address for routing by splitting it up into a |
| 5059 | local part and a domain. The local part is set up twice - once in its original |
| 5060 | casing, and once in lower case, and it is dequoted. We also do the "percent |
| 5061 | hack" for configured domains. This may lead to a DEFER result if a lookup |
| 5062 | defers. When a percent-hacking takes place, we insert a copy of the original |
| 5063 | address as a new parent of this address, as if we have had a redirection. |
| 5064 | |
| 5065 | Argument: |
| 5066 | addr points to an addr_item block containing the address |
| 5067 | |
| 5068 | Returns: OK |
| 5069 | DEFER - could not determine if domain is %-hackable |
| 5070 | */ |
| 5071 | |
| 5072 | int |
| 5073 | deliver_split_address(address_item * addr) |
| 5074 | { |
| 5075 | uschar * address = addr->address; |
| 5076 | uschar * domain; |
| 5077 | uschar * t; |
| 5078 | int len; |
| 5079 | |
| 5080 | if (!(domain = Ustrrchr(address, '@'))) |
| 5081 | return DEFER; /* should always have a domain, but just in case... */ |
| 5082 | |
| 5083 | len = domain - address; |
| 5084 | addr->domain = string_copylc(domain+1); /* Domains are always caseless */ |
| 5085 | |
| 5086 | /* The implication in the RFCs (though I can't say I've seen it spelled out |
| 5087 | explicitly) is that quoting should be removed from local parts at the point |
| 5088 | where they are locally interpreted. [The new draft "821" is more explicit on |
| 5089 | this, Jan 1999.] We know the syntax is valid, so this can be done by simply |
| 5090 | removing quoting backslashes and any unquoted doublequotes. */ |
| 5091 | |
| 5092 | t = addr->cc_local_part = store_get(len+1, is_tainted(address)); |
| 5093 | while(len-- > 0) |
| 5094 | { |
| 5095 | int c = *address++; |
| 5096 | if (c == '\"') continue; |
| 5097 | if (c == '\\') |
| 5098 | { |
| 5099 | *t++ = *address++; |
| 5100 | len--; |
| 5101 | } |
| 5102 | else *t++ = c; |
| 5103 | } |
| 5104 | *t = 0; |
| 5105 | |
| 5106 | /* We do the percent hack only for those domains that are listed in |
| 5107 | percent_hack_domains. A loop is required, to copy with multiple %-hacks. */ |
| 5108 | |
| 5109 | if (percent_hack_domains) |
| 5110 | { |
| 5111 | int rc; |
| 5112 | uschar *new_address = NULL; |
| 5113 | uschar *local_part = addr->cc_local_part; |
| 5114 | |
| 5115 | deliver_domain = addr->domain; /* set $domain */ |
| 5116 | |
| 5117 | while ( (rc = match_isinlist(deliver_domain, (const uschar **)&percent_hack_domains, 0, |
| 5118 | &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL)) |
| 5119 | == OK |
| 5120 | && (t = Ustrrchr(local_part, '%')) != NULL |
| 5121 | ) |
| 5122 | { |
| 5123 | new_address = string_copy(local_part); |
| 5124 | new_address[t - local_part] = '@'; |
| 5125 | deliver_domain = string_copylc(t+1); |
| 5126 | local_part = string_copyn(local_part, t - local_part); |
| 5127 | } |
| 5128 | |
| 5129 | if (rc == DEFER) return DEFER; /* lookup deferred */ |
| 5130 | |
| 5131 | /* If hackery happened, set up new parent and alter the current address. */ |
| 5132 | |
| 5133 | if (new_address) |
| 5134 | { |
| 5135 | address_item *new_parent = store_get(sizeof(address_item), FALSE); |
| 5136 | *new_parent = *addr; |
| 5137 | addr->parent = new_parent; |
| 5138 | new_parent->child_count = 1; |
| 5139 | addr->address = new_address; |
| 5140 | addr->unique = string_copy(new_address); |
| 5141 | addr->domain = deliver_domain; |
| 5142 | addr->cc_local_part = local_part; |
| 5143 | DEBUG(D_deliver) debug_printf("%%-hack changed address to: %s\n", |
| 5144 | addr->address); |
| 5145 | } |
| 5146 | } |
| 5147 | |
| 5148 | /* Create the lowercased version of the final local part, and make that the |
| 5149 | default one to be used. */ |
| 5150 | |
| 5151 | addr->local_part = addr->lc_local_part = string_copylc(addr->cc_local_part); |
| 5152 | return OK; |
| 5153 | } |
| 5154 | |
| 5155 | |
| 5156 | |
| 5157 | |
| 5158 | /************************************************* |
| 5159 | * Get next error message text * |
| 5160 | *************************************************/ |
| 5161 | |
| 5162 | /* If f is not NULL, read the next "paragraph", from a customized error message |
| 5163 | text file, terminated by a line containing ****, and expand it. |
| 5164 | |
| 5165 | Arguments: |
| 5166 | f NULL or a file to read from |
| 5167 | which string indicating which string (for errors) |
| 5168 | |
| 5169 | Returns: NULL or an expanded string |
| 5170 | */ |
| 5171 | |
| 5172 | static uschar * |
| 5173 | next_emf(FILE *f, uschar *which) |
| 5174 | { |
| 5175 | uschar *yield; |
| 5176 | gstring * para; |
| 5177 | uschar buffer[256]; |
| 5178 | |
| 5179 | if (!f) return NULL; |
| 5180 | |
| 5181 | if (!Ufgets(buffer, sizeof(buffer), f) || Ustrcmp(buffer, "****\n") == 0) |
| 5182 | return NULL; |
| 5183 | |
| 5184 | para = string_get(256); |
| 5185 | for (;;) |
| 5186 | { |
| 5187 | para = string_cat(para, buffer); |
| 5188 | if (!Ufgets(buffer, sizeof(buffer), f) || Ustrcmp(buffer, "****\n") == 0) |
| 5189 | break; |
| 5190 | } |
| 5191 | if ((yield = expand_string(string_from_gstring(para)))) |
| 5192 | return yield; |
| 5193 | |
| 5194 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand string from " |
| 5195 | "bounce_message_file or warn_message_file (%s): %s", which, |
| 5196 | expand_string_message); |
| 5197 | return NULL; |
| 5198 | } |
| 5199 | |
| 5200 | |
| 5201 | |
| 5202 | |
| 5203 | /************************************************* |
| 5204 | * Close down a passed transport channel * |
| 5205 | *************************************************/ |
| 5206 | |
| 5207 | /* This function is called when a passed transport channel cannot be used. |
| 5208 | It attempts to close it down tidily. The yield is always DELIVER_NOT_ATTEMPTED |
| 5209 | so that the function call can be the argument of a "return" statement. |
| 5210 | |
| 5211 | Arguments: None |
| 5212 | Returns: DELIVER_NOT_ATTEMPTED |
| 5213 | */ |
| 5214 | |
| 5215 | static int |
| 5216 | continue_closedown(void) |
| 5217 | { |
| 5218 | if (continue_transport) |
| 5219 | for (transport_instance * t = transports; t; t = t->next) |
| 5220 | if (Ustrcmp(t->name, continue_transport) == 0) |
| 5221 | { |
| 5222 | if (t->info->closedown) (t->info->closedown)(t); |
| 5223 | break; |
| 5224 | } |
| 5225 | return DELIVER_NOT_ATTEMPTED; |
| 5226 | } |
| 5227 | |
| 5228 | |
| 5229 | |
| 5230 | |
| 5231 | /************************************************* |
| 5232 | * Print address information * |
| 5233 | *************************************************/ |
| 5234 | |
| 5235 | /* This function is called to output an address, or information about an |
| 5236 | address, for bounce or defer messages. If the hide_child flag is set, all we |
| 5237 | output is the original ancestor address. |
| 5238 | |
| 5239 | Arguments: |
| 5240 | addr points to the address |
| 5241 | f the FILE to print to |
| 5242 | si an initial string |
| 5243 | sc a continuation string for before "generated" |
| 5244 | se an end string |
| 5245 | |
| 5246 | Returns: TRUE if the address is not hidden |
| 5247 | */ |
| 5248 | |
| 5249 | static BOOL |
| 5250 | print_address_information(address_item *addr, FILE *f, uschar *si, uschar *sc, |
| 5251 | uschar *se) |
| 5252 | { |
| 5253 | BOOL yield = TRUE; |
| 5254 | uschar *printed = US""; |
| 5255 | address_item *ancestor = addr; |
| 5256 | while (ancestor->parent) ancestor = ancestor->parent; |
| 5257 | |
| 5258 | fprintf(f, "%s", CS si); |
| 5259 | |
| 5260 | if (addr->parent && testflag(addr, af_hide_child)) |
| 5261 | { |
| 5262 | printed = US"an undisclosed address"; |
| 5263 | yield = FALSE; |
| 5264 | } |
| 5265 | else if (!testflag(addr, af_pfr) || !addr->parent) |
| 5266 | printed = addr->address; |
| 5267 | |
| 5268 | else |
| 5269 | { |
| 5270 | uschar *s = addr->address; |
| 5271 | uschar *ss; |
| 5272 | |
| 5273 | if (addr->address[0] == '>') { ss = US"mail"; s++; } |
| 5274 | else if (addr->address[0] == '|') ss = US"pipe"; |
| 5275 | else ss = US"save"; |
| 5276 | |
| 5277 | fprintf(f, "%s to %s%sgenerated by ", ss, s, sc); |
| 5278 | printed = addr->parent->address; |
| 5279 | } |
| 5280 | |
| 5281 | fprintf(f, "%s", CS string_printing(printed)); |
| 5282 | |
| 5283 | if (ancestor != addr) |
| 5284 | { |
| 5285 | uschar *original = ancestor->onetime_parent; |
| 5286 | if (!original) original= ancestor->address; |
| 5287 | if (strcmpic(original, printed) != 0) |
| 5288 | fprintf(f, "%s(%sgenerated from %s)", sc, |
| 5289 | ancestor != addr->parent ? "ultimately " : "", |
| 5290 | string_printing(original)); |
| 5291 | } |
| 5292 | |
| 5293 | if (addr->host_used) |
| 5294 | fprintf(f, "\n host %s [%s]", |
| 5295 | addr->host_used->name, addr->host_used->address); |
| 5296 | |
| 5297 | fprintf(f, "%s", CS se); |
| 5298 | return yield; |
| 5299 | } |
| 5300 | |
| 5301 | |
| 5302 | |
| 5303 | |
| 5304 | |
| 5305 | /************************************************* |
| 5306 | * Print error for an address * |
| 5307 | *************************************************/ |
| 5308 | |
| 5309 | /* This function is called to print the error information out of an address for |
| 5310 | a bounce or a warning message. It tries to format the message reasonably by |
| 5311 | introducing newlines. All lines are indented by 4; the initial printing |
| 5312 | position must be set before calling. |
| 5313 | |
| 5314 | This function used always to print the error. Nowadays we want to restrict it |
| 5315 | to cases such as LMTP/SMTP errors from a remote host, and errors from :fail: |
| 5316 | and filter "fail". We no longer pass other information willy-nilly in bounce |
| 5317 | and warning messages. Text in user_message is always output; text in message |
| 5318 | only if the af_pass_message flag is set. |
| 5319 | |
| 5320 | Arguments: |
| 5321 | addr the address |
| 5322 | f the FILE to print on |
| 5323 | t some leading text |
| 5324 | |
| 5325 | Returns: nothing |
| 5326 | */ |
| 5327 | |
| 5328 | static void |
| 5329 | print_address_error(address_item *addr, FILE *f, uschar *t) |
| 5330 | { |
| 5331 | int count = Ustrlen(t); |
| 5332 | uschar *s = testflag(addr, af_pass_message) ? addr->message : NULL; |
| 5333 | |
| 5334 | if (!s && !(s = addr->user_message)) |
| 5335 | return; |
| 5336 | |
| 5337 | fprintf(f, "\n %s", t); |
| 5338 | |
| 5339 | while (*s) |
| 5340 | if (*s == '\\' && s[1] == 'n') |
| 5341 | { |
| 5342 | fprintf(f, "\n "); |
| 5343 | s += 2; |
| 5344 | count = 0; |
| 5345 | } |
| 5346 | else |
| 5347 | { |
| 5348 | fputc(*s, f); |
| 5349 | count++; |
| 5350 | if (*s++ == ':' && isspace(*s) && count > 45) |
| 5351 | { |
| 5352 | fprintf(f, "\n "); /* sic (because space follows) */ |
| 5353 | count = 0; |
| 5354 | } |
| 5355 | } |
| 5356 | } |
| 5357 | |
| 5358 | |
| 5359 | /*********************************************************** |
| 5360 | * Print Diagnostic-Code for an address * |
| 5361 | ************************************************************/ |
| 5362 | |
| 5363 | /* This function is called to print the error information out of an address for |
| 5364 | a bounce or a warning message. It tries to format the message reasonably as |
| 5365 | required by RFC 3461 by adding a space after each newline |
| 5366 | |
| 5367 | it uses the same logic as print_address_error() above. if af_pass_message is true |
| 5368 | and addr->message is set it uses the remote host answer. if not addr->user_message |
| 5369 | is used instead if available. |
| 5370 | |
| 5371 | Arguments: |
| 5372 | addr the address |
| 5373 | f the FILE to print on |
| 5374 | |
| 5375 | Returns: nothing |
| 5376 | */ |
| 5377 | |
| 5378 | static void |
| 5379 | print_dsn_diagnostic_code(const address_item *addr, FILE *f) |
| 5380 | { |
| 5381 | uschar *s = testflag(addr, af_pass_message) ? addr->message : NULL; |
| 5382 | |
| 5383 | /* af_pass_message and addr->message set ? print remote host answer */ |
| 5384 | if (s) |
| 5385 | { |
| 5386 | DEBUG(D_deliver) |
| 5387 | debug_printf("DSN Diagnostic-Code: addr->message = %s\n", addr->message); |
| 5388 | |
| 5389 | /* search first ": ". we assume to find the remote-MTA answer there */ |
| 5390 | if (!(s = Ustrstr(addr->message, ": "))) |
| 5391 | return; /* not found, bail out */ |
| 5392 | s += 2; /* skip ": " */ |
| 5393 | fprintf(f, "Diagnostic-Code: smtp; "); |
| 5394 | } |
| 5395 | /* no message available. do nothing */ |
| 5396 | else return; |
| 5397 | |
| 5398 | while (*s) |
| 5399 | if (*s == '\\' && s[1] == 'n') |
| 5400 | { |
| 5401 | fputs("\n ", f); /* as defined in RFC 3461 */ |
| 5402 | s += 2; |
| 5403 | } |
| 5404 | else |
| 5405 | fputc(*s++, f); |
| 5406 | |
| 5407 | fputc('\n', f); |
| 5408 | } |
| 5409 | |
| 5410 | |
| 5411 | /************************************************* |
| 5412 | * Check list of addresses for duplication * |
| 5413 | *************************************************/ |
| 5414 | |
| 5415 | /* This function was introduced when the test for duplicate addresses that are |
| 5416 | not pipes, files, or autoreplies was moved from the middle of routing to when |
| 5417 | routing was complete. That was to fix obscure cases when the routing history |
| 5418 | affects the subsequent routing of identical addresses. This function is called |
| 5419 | after routing, to check that the final routed addresses are not duplicates. |
| 5420 | |
| 5421 | If we detect a duplicate, we remember what it is a duplicate of. Note that |
| 5422 | pipe, file, and autoreply de-duplication is handled during routing, so we must |
| 5423 | leave such "addresses" alone here, as otherwise they will incorrectly be |
| 5424 | discarded. |
| 5425 | |
| 5426 | Argument: address of list anchor |
| 5427 | Returns: nothing |
| 5428 | */ |
| 5429 | |
| 5430 | static void |
| 5431 | do_duplicate_check(address_item **anchor) |
| 5432 | { |
| 5433 | address_item *addr; |
| 5434 | while ((addr = *anchor)) |
| 5435 | { |
| 5436 | tree_node *tnode; |
| 5437 | if (testflag(addr, af_pfr)) |
| 5438 | { |
| 5439 | anchor = &(addr->next); |
| 5440 | } |
| 5441 | else if ((tnode = tree_search(tree_duplicates, addr->unique))) |
| 5442 | { |
| 5443 | DEBUG(D_deliver|D_route) |
| 5444 | debug_printf("%s is a duplicate address: discarded\n", addr->unique); |
| 5445 | *anchor = addr->next; |
| 5446 | addr->dupof = tnode->data.ptr; |
| 5447 | addr->next = addr_duplicate; |
| 5448 | addr_duplicate = addr; |
| 5449 | } |
| 5450 | else |
| 5451 | { |
| 5452 | tree_add_duplicate(addr->unique, addr); |
| 5453 | anchor = &(addr->next); |
| 5454 | } |
| 5455 | } |
| 5456 | } |
| 5457 | |
| 5458 | |
| 5459 | |
| 5460 | |
| 5461 | /************************************************/ |
| 5462 | |
| 5463 | static void |
| 5464 | print_dsn_addr_action(FILE * f, address_item * addr, |
| 5465 | uschar * action, uschar * status) |
| 5466 | { |
| 5467 | address_item * pa; |
| 5468 | |
| 5469 | if (addr->dsn_orcpt) |
| 5470 | fprintf(f,"Original-Recipient: %s\n", addr->dsn_orcpt); |
| 5471 | |
| 5472 | for (pa = addr; pa->parent; ) pa = pa->parent; |
| 5473 | fprintf(f, "Action: %s\n" |
| 5474 | "Final-Recipient: rfc822;%s\n" |
| 5475 | "Status: %s\n", |
| 5476 | action, pa->address, status); |
| 5477 | } |
| 5478 | |
| 5479 | |
| 5480 | |
| 5481 | /* When running in the test harness, there's an option that allows us to |
| 5482 | fudge this time so as to get repeatability of the tests. Take the first |
| 5483 | time off the list. In queue runs, the list pointer gets updated in the |
| 5484 | calling process. */ |
| 5485 | |
| 5486 | int |
| 5487 | test_harness_fudged_queue_time(int actual_time) |
| 5488 | { |
| 5489 | int qt; |
| 5490 | if ( f.running_in_test_harness && *fudged_queue_times |
| 5491 | && (qt = readconf_readtime(fudged_queue_times, '/', FALSE)) >= 0) |
| 5492 | { |
| 5493 | DEBUG(D_deliver) debug_printf("fudged queue_times = %s\n", |
| 5494 | fudged_queue_times); |
| 5495 | return qt; |
| 5496 | } |
| 5497 | return actual_time; |
| 5498 | } |
| 5499 | |
| 5500 | /************************************************* |
| 5501 | * Deliver one message * |
| 5502 | *************************************************/ |
| 5503 | |
| 5504 | /* This is the function which is called when a message is to be delivered. It |
| 5505 | is passed the id of the message. It is possible that the message no longer |
| 5506 | exists, if some other process has delivered it, and it is also possible that |
| 5507 | the message is being worked on by another process, in which case the data file |
| 5508 | will be locked. |
| 5509 | |
| 5510 | If no delivery is attempted for any of the above reasons, the function returns |
| 5511 | DELIVER_NOT_ATTEMPTED. |
| 5512 | |
| 5513 | If the give_up flag is set true, do not attempt any deliveries, but instead |
| 5514 | fail all outstanding addresses and return the message to the sender (or |
| 5515 | whoever). |
| 5516 | |
| 5517 | A delivery operation has a process all to itself; we never deliver more than |
| 5518 | one message in the same process. Therefore we needn't worry too much about |
| 5519 | store leakage. |
| 5520 | |
| 5521 | Liable to be called as root. |
| 5522 | |
| 5523 | Arguments: |
| 5524 | id the id of the message to be delivered |
| 5525 | forced TRUE if delivery was forced by an administrator; this overrides |
| 5526 | retry delays and causes a delivery to be tried regardless |
| 5527 | give_up TRUE if an administrator has requested that delivery attempts |
| 5528 | be abandoned |
| 5529 | |
| 5530 | Returns: When the global variable mua_wrapper is FALSE: |
| 5531 | DELIVER_ATTEMPTED_NORMAL if a delivery attempt was made |
| 5532 | DELIVER_NOT_ATTEMPTED otherwise (see comment above) |
| 5533 | When the global variable mua_wrapper is TRUE: |
| 5534 | DELIVER_MUA_SUCCEEDED if delivery succeeded |
| 5535 | DELIVER_MUA_FAILED if delivery failed |
| 5536 | DELIVER_NOT_ATTEMPTED if not attempted (should not occur) |
| 5537 | */ |
| 5538 | |
| 5539 | int |
| 5540 | deliver_message(uschar *id, BOOL forced, BOOL give_up) |
| 5541 | { |
| 5542 | int i, rc; |
| 5543 | int final_yield = DELIVER_ATTEMPTED_NORMAL; |
| 5544 | time_t now = time(NULL); |
| 5545 | address_item *addr_last = NULL; |
| 5546 | uschar *filter_message = NULL; |
| 5547 | int process_recipients = RECIP_ACCEPT; |
| 5548 | open_db dbblock; |
| 5549 | open_db *dbm_file; |
| 5550 | extern int acl_where; |
| 5551 | uschar *info; |
| 5552 | |
| 5553 | #ifdef MEASURE_TIMING |
| 5554 | report_time_since(×tamp_startup, US"delivery start"); /* testcase 0022, 2100 */ |
| 5555 | #endif |
| 5556 | |
| 5557 | info = queue_run_pid == (pid_t)0 |
| 5558 | ? string_sprintf("delivering %s", id) |
| 5559 | : string_sprintf("delivering %s (queue run pid %d)", id, queue_run_pid); |
| 5560 | |
| 5561 | /* If the D_process_info bit is on, set_process_info() will output debugging |
| 5562 | information. If not, we want to show this initial information if D_deliver or |
| 5563 | D_queue_run is set or in verbose mode. */ |
| 5564 | |
| 5565 | set_process_info("%s", info); |
| 5566 | |
| 5567 | if ( !(debug_selector & D_process_info) |
| 5568 | && (debug_selector & (D_deliver|D_queue_run|D_v)) |
| 5569 | ) |
| 5570 | debug_printf("%s\n", info); |
| 5571 | |
| 5572 | /* Ensure that we catch any subprocesses that are created. Although Exim |
| 5573 | sets SIG_DFL as its initial default, some routes through the code end up |
| 5574 | here with it set to SIG_IGN - cases where a non-synchronous delivery process |
| 5575 | has been forked, but no re-exec has been done. We use sigaction rather than |
| 5576 | plain signal() on those OS where SA_NOCLDWAIT exists, because we want to be |
| 5577 | sure it is turned off. (There was a problem on AIX with this.) */ |
| 5578 | |
| 5579 | #ifdef SA_NOCLDWAIT |
| 5580 | { |
| 5581 | struct sigaction act; |
| 5582 | act.sa_handler = SIG_DFL; |
| 5583 | sigemptyset(&(act.sa_mask)); |
| 5584 | act.sa_flags = 0; |
| 5585 | sigaction(SIGCHLD, &act, NULL); |
| 5586 | } |
| 5587 | #else |
| 5588 | signal(SIGCHLD, SIG_DFL); |
| 5589 | #endif |
| 5590 | |
| 5591 | /* Make the forcing flag available for routers and transports, set up the |
| 5592 | global message id field, and initialize the count for returned files and the |
| 5593 | message size. This use of strcpy() is OK because the length id is checked when |
| 5594 | it is obtained from a command line (the -M or -q options), and otherwise it is |
| 5595 | known to be a valid message id. */ |
| 5596 | |
| 5597 | if (id != message_id) |
| 5598 | Ustrcpy(message_id, id); |
| 5599 | f.deliver_force = forced; |
| 5600 | return_count = 0; |
| 5601 | message_size = 0; |
| 5602 | |
| 5603 | /* Initialize some flags */ |
| 5604 | |
| 5605 | update_spool = FALSE; |
| 5606 | remove_journal = TRUE; |
| 5607 | |
| 5608 | /* Set a known context for any ACLs we call via expansions */ |
| 5609 | acl_where = ACL_WHERE_DELIVERY; |
| 5610 | |
| 5611 | /* Reset the random number generator, so that if several delivery processes are |
| 5612 | started from a queue runner that has already used random numbers (for sorting), |
| 5613 | they don't all get the same sequence. */ |
| 5614 | |
| 5615 | random_seed = 0; |
| 5616 | |
| 5617 | /* Open and lock the message's data file. Exim locks on this one because the |
| 5618 | header file may get replaced as it is re-written during the delivery process. |
| 5619 | Any failures cause messages to be written to the log, except for missing files |
| 5620 | while queue running - another process probably completed delivery. As part of |
| 5621 | opening the data file, message_subdir gets set. */ |
| 5622 | |
| 5623 | if ((deliver_datafile = spool_open_datafile(id)) < 0) |
| 5624 | return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */ |
| 5625 | |
| 5626 | /* The value of message_size at this point has been set to the data length, |
| 5627 | plus one for the blank line that notionally precedes the data. */ |
| 5628 | |
| 5629 | /* Now read the contents of the header file, which will set up the headers in |
| 5630 | store, and also the list of recipients and the tree of non-recipients and |
| 5631 | assorted flags. It updates message_size. If there is a reading or format error, |
| 5632 | give up; if the message has been around for sufficiently long, remove it. */ |
| 5633 | |
| 5634 | { |
| 5635 | uschar * spoolname = string_sprintf("%s-H", id); |
| 5636 | if ((rc = spool_read_header(spoolname, TRUE, TRUE)) != spool_read_OK) |
| 5637 | { |
| 5638 | if (errno == ERRNO_SPOOLFORMAT) |
| 5639 | { |
| 5640 | struct stat statbuf; |
| 5641 | if (Ustat(spool_fname(US"input", message_subdir, spoolname, US""), |
| 5642 | &statbuf) == 0) |
| 5643 | log_write(0, LOG_MAIN, "Format error in spool file %s: " |
| 5644 | "size=" OFF_T_FMT, spoolname, statbuf.st_size); |
| 5645 | else |
| 5646 | log_write(0, LOG_MAIN, "Format error in spool file %s", spoolname); |
| 5647 | } |
| 5648 | else |
| 5649 | log_write(0, LOG_MAIN, "Error reading spool file %s: %s", spoolname, |
| 5650 | strerror(errno)); |
| 5651 | |
| 5652 | /* If we managed to read the envelope data, received_time contains the |
| 5653 | time the message was received. Otherwise, we can calculate it from the |
| 5654 | message id. */ |
| 5655 | |
| 5656 | if (rc != spool_read_hdrerror) |
| 5657 | { |
| 5658 | received_time.tv_sec = received_time.tv_usec = 0; |
| 5659 | /*XXX subsec precision?*/ |
| 5660 | for (i = 0; i < 6; i++) |
| 5661 | received_time.tv_sec = received_time.tv_sec * BASE_62 + tab62[id[i] - '0']; |
| 5662 | } |
| 5663 | |
| 5664 | /* If we've had this malformed message too long, sling it. */ |
| 5665 | |
| 5666 | if (now - received_time.tv_sec > keep_malformed) |
| 5667 | { |
| 5668 | Uunlink(spool_fname(US"msglog", message_subdir, id, US"")); |
| 5669 | Uunlink(spool_fname(US"input", message_subdir, id, US"-D")); |
| 5670 | Uunlink(spool_fname(US"input", message_subdir, id, US"-H")); |
| 5671 | Uunlink(spool_fname(US"input", message_subdir, id, US"-J")); |
| 5672 | log_write(0, LOG_MAIN, "Message removed because older than %s", |
| 5673 | readconf_printtime(keep_malformed)); |
| 5674 | } |
| 5675 | |
| 5676 | (void)close(deliver_datafile); |
| 5677 | deliver_datafile = -1; |
| 5678 | return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */ |
| 5679 | } |
| 5680 | } |
| 5681 | |
| 5682 | /* The spool header file has been read. Look to see if there is an existing |
| 5683 | journal file for this message. If there is, it means that a previous delivery |
| 5684 | attempt crashed (program or host) before it could update the spool header file. |
| 5685 | Read the list of delivered addresses from the journal and add them to the |
| 5686 | nonrecipients tree. Then update the spool file. We can leave the journal in |
| 5687 | existence, as it will get further successful deliveries added to it in this |
| 5688 | run, and it will be deleted if this function gets to its end successfully. |
| 5689 | Otherwise it might be needed again. */ |
| 5690 | |
| 5691 | { |
| 5692 | uschar * fname = spool_fname(US"input", message_subdir, id, US"-J"); |
| 5693 | FILE * jread; |
| 5694 | |
| 5695 | if ( (journal_fd = Uopen(fname, O_RDWR|O_APPEND |
| 5696 | #ifdef O_CLOEXEC |
| 5697 | | O_CLOEXEC |
| 5698 | #endif |
| 5699 | #ifdef O_NOFOLLOW |
| 5700 | | O_NOFOLLOW |
| 5701 | #endif |
| 5702 | , SPOOL_MODE)) >= 0 |
| 5703 | && lseek(journal_fd, 0, SEEK_SET) == 0 |
| 5704 | && (jread = fdopen(journal_fd, "rb")) |
| 5705 | ) |
| 5706 | { |
| 5707 | while (Ufgets(big_buffer, big_buffer_size, jread)) |
| 5708 | { |
| 5709 | int n = Ustrlen(big_buffer); |
| 5710 | big_buffer[n-1] = 0; |
| 5711 | tree_add_nonrecipient(big_buffer); |
| 5712 | DEBUG(D_deliver) debug_printf("Previously delivered address %s taken from " |
| 5713 | "journal file\n", big_buffer); |
| 5714 | } |
| 5715 | rewind(jread); |
| 5716 | if ((journal_fd = dup(fileno(jread))) < 0) |
| 5717 | journal_fd = fileno(jread); |
| 5718 | else |
| 5719 | (void) fclose(jread); /* Try to not leak the FILE resource */ |
| 5720 | |
| 5721 | /* Panic-dies on error */ |
| 5722 | (void)spool_write_header(message_id, SW_DELIVERING, NULL); |
| 5723 | } |
| 5724 | else if (errno != ENOENT) |
| 5725 | { |
| 5726 | log_write(0, LOG_MAIN|LOG_PANIC, "attempt to open journal for reading gave: " |
| 5727 | "%s", strerror(errno)); |
| 5728 | return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */ |
| 5729 | } |
| 5730 | |
| 5731 | /* A null recipients list indicates some kind of disaster. */ |
| 5732 | |
| 5733 | if (!recipients_list) |
| 5734 | { |
| 5735 | (void)close(deliver_datafile); |
| 5736 | deliver_datafile = -1; |
| 5737 | log_write(0, LOG_MAIN, "Spool error: no recipients for %s", fname); |
| 5738 | return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */ |
| 5739 | } |
| 5740 | } |
| 5741 | |
| 5742 | |
| 5743 | /* Handle a message that is frozen. There are a number of different things that |
| 5744 | can happen, but in the default situation, unless forced, no delivery is |
| 5745 | attempted. */ |
| 5746 | |
| 5747 | if (f.deliver_freeze) |
| 5748 | { |
| 5749 | #ifdef SUPPORT_MOVE_FROZEN_MESSAGES |
| 5750 | /* Moving to another directory removes the message from Exim's view. Other |
| 5751 | tools must be used to deal with it. Logging of this action happens in |
| 5752 | spool_move_message() and its subfunctions. */ |
| 5753 | |
| 5754 | if ( move_frozen_messages |
| 5755 | && spool_move_message(id, message_subdir, US"", US"F") |
| 5756 | ) |
| 5757 | return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */ |
| 5758 | #endif |
| 5759 | |
| 5760 | /* For all frozen messages (bounces or not), timeout_frozen_after sets the |
| 5761 | maximum time to keep messages that are frozen. Thaw if we reach it, with a |
| 5762 | flag causing all recipients to be failed. The time is the age of the |
| 5763 | message, not the time since freezing. */ |
| 5764 | |
| 5765 | if (timeout_frozen_after > 0 && message_age >= timeout_frozen_after) |
| 5766 | { |
| 5767 | log_write(0, LOG_MAIN, "cancelled by timeout_frozen_after"); |
| 5768 | process_recipients = RECIP_FAIL_TIMEOUT; |
| 5769 | } |
| 5770 | |
| 5771 | /* For bounce messages (and others with no sender), thaw if the error message |
| 5772 | ignore timer is exceeded. The message will be discarded if this delivery |
| 5773 | fails. */ |
| 5774 | |
| 5775 | else if (!*sender_address && message_age >= ignore_bounce_errors_after) |
| 5776 | log_write(0, LOG_MAIN, "Unfrozen by errmsg timer"); |
| 5777 | |
| 5778 | /* If this is a bounce message, or there's no auto thaw, or we haven't |
| 5779 | reached the auto thaw time yet, and this delivery is not forced by an admin |
| 5780 | user, do not attempt delivery of this message. Note that forced is set for |
| 5781 | continuing messages down the same channel, in order to skip load checking and |
| 5782 | ignore hold domains, but we don't want unfreezing in that case. */ |
| 5783 | |
| 5784 | else |
| 5785 | { |
| 5786 | if ( ( sender_address[0] == 0 |
| 5787 | || auto_thaw <= 0 |
| 5788 | || now <= deliver_frozen_at + auto_thaw |
| 5789 | ) |
| 5790 | && ( !forced || !f.deliver_force_thaw |
| 5791 | || !f.admin_user || continue_hostname |
| 5792 | ) ) |
| 5793 | { |
| 5794 | (void)close(deliver_datafile); |
| 5795 | deliver_datafile = -1; |
| 5796 | log_write(L_skip_delivery, LOG_MAIN, "Message is frozen"); |
| 5797 | return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */ |
| 5798 | } |
| 5799 | |
| 5800 | /* If delivery was forced (by an admin user), assume a manual thaw. |
| 5801 | Otherwise it's an auto thaw. */ |
| 5802 | |
| 5803 | if (forced) |
| 5804 | { |
| 5805 | f.deliver_manual_thaw = TRUE; |
| 5806 | log_write(0, LOG_MAIN, "Unfrozen by forced delivery"); |
| 5807 | } |
| 5808 | else log_write(0, LOG_MAIN, "Unfrozen by auto-thaw"); |
| 5809 | } |
| 5810 | |
| 5811 | /* We get here if any of the rules for unfreezing have triggered. */ |
| 5812 | |
| 5813 | f.deliver_freeze = FALSE; |
| 5814 | update_spool = TRUE; |
| 5815 | } |
| 5816 | |
| 5817 | |
| 5818 | /* Open the message log file if we are using them. This records details of |
| 5819 | deliveries, deferments, and failures for the benefit of the mail administrator. |
| 5820 | The log is not used by exim itself to track the progress of a message; that is |
| 5821 | done by rewriting the header spool file. */ |
| 5822 | |
| 5823 | if (message_logs) |
| 5824 | { |
| 5825 | uschar * fname = spool_fname(US"msglog", message_subdir, id, US""); |
| 5826 | uschar * error; |
| 5827 | int fd; |
| 5828 | |
| 5829 | if ((fd = open_msglog_file(fname, SPOOL_MODE, &error)) < 0) |
| 5830 | { |
| 5831 | log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't %s message log %s: %s", error, |
| 5832 | fname, strerror(errno)); |
| 5833 | return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */ |
| 5834 | } |
| 5835 | |
| 5836 | /* Make a C stream out of it. */ |
| 5837 | |
| 5838 | if (!(message_log = fdopen(fd, "a"))) |
| 5839 | { |
| 5840 | log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't fdopen message log %s: %s", |
| 5841 | fname, strerror(errno)); |
| 5842 | return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */ |
| 5843 | } |
| 5844 | } |
| 5845 | |
| 5846 | |
| 5847 | /* If asked to give up on a message, log who did it, and set the action for all |
| 5848 | the addresses. */ |
| 5849 | |
| 5850 | if (give_up) |
| 5851 | { |
| 5852 | struct passwd *pw = getpwuid(real_uid); |
| 5853 | log_write(0, LOG_MAIN, "cancelled by %s", |
| 5854 | pw ? US pw->pw_name : string_sprintf("uid %ld", (long int)real_uid)); |
| 5855 | process_recipients = RECIP_FAIL; |
| 5856 | } |
| 5857 | |
| 5858 | /* Otherwise, if there are too many Received: headers, fail all recipients. */ |
| 5859 | |
| 5860 | else if (received_count > received_headers_max) |
| 5861 | process_recipients = RECIP_FAIL_LOOP; |
| 5862 | |
| 5863 | /* Otherwise, if a system-wide, address-independent message filter is |
| 5864 | specified, run it now, except in the case when we are failing all recipients as |
| 5865 | a result of timeout_frozen_after. If the system filter yields "delivered", then |
| 5866 | ignore the true recipients of the message. Failure of the filter file is |
| 5867 | logged, and the delivery attempt fails. */ |
| 5868 | |
| 5869 | else if (system_filter && process_recipients != RECIP_FAIL_TIMEOUT) |
| 5870 | { |
| 5871 | int rc; |
| 5872 | int filtertype; |
| 5873 | ugid_block ugid; |
| 5874 | redirect_block redirect; |
| 5875 | |
| 5876 | if (system_filter_uid_set) |
| 5877 | { |
| 5878 | ugid.uid = system_filter_uid; |
| 5879 | ugid.gid = system_filter_gid; |
| 5880 | ugid.uid_set = ugid.gid_set = TRUE; |
| 5881 | } |
| 5882 | else |
| 5883 | ugid.uid_set = ugid.gid_set = FALSE; |
| 5884 | |
| 5885 | return_path = sender_address; |
| 5886 | f.enable_dollar_recipients = TRUE; /* Permit $recipients in system filter */ |
| 5887 | f.system_filtering = TRUE; |
| 5888 | |
| 5889 | /* Any error in the filter file causes a delivery to be abandoned. */ |
| 5890 | |
| 5891 | redirect.string = system_filter; |
| 5892 | redirect.isfile = TRUE; |
| 5893 | redirect.check_owner = redirect.check_group = FALSE; |
| 5894 | redirect.owners = NULL; |
| 5895 | redirect.owngroups = NULL; |
| 5896 | redirect.pw = NULL; |
| 5897 | redirect.modemask = 0; |
| 5898 | |
| 5899 | DEBUG(D_deliver|D_filter) debug_printf("running system filter\n"); |
| 5900 | |
| 5901 | rc = rda_interpret( |
| 5902 | &redirect, /* Where the data is */ |
| 5903 | RDO_DEFER | /* Turn on all the enabling options */ |
| 5904 | RDO_FAIL | /* Leave off all the disabling options */ |
| 5905 | RDO_FILTER | |
| 5906 | RDO_FREEZE | |
| 5907 | RDO_REALLOG | |
| 5908 | RDO_REWRITE, |
| 5909 | NULL, /* No :include: restriction (not used in filter) */ |
| 5910 | NULL, /* No sieve vacation directory (not sieve!) */ |
| 5911 | NULL, /* No sieve enotify mailto owner (not sieve!) */ |
| 5912 | NULL, /* No sieve user address (not sieve!) */ |
| 5913 | NULL, /* No sieve subaddress (not sieve!) */ |
| 5914 | &ugid, /* uid/gid data */ |
| 5915 | &addr_new, /* Where to hang generated addresses */ |
| 5916 | &filter_message, /* Where to put error message */ |
| 5917 | NULL, /* Don't skip syntax errors */ |
| 5918 | &filtertype, /* Will always be set to FILTER_EXIM for this call */ |
| 5919 | US"system filter"); /* For error messages */ |
| 5920 | |
| 5921 | DEBUG(D_deliver|D_filter) debug_printf("system filter returned %d\n", rc); |
| 5922 | |
| 5923 | if (rc == FF_ERROR || rc == FF_NONEXIST) |
| 5924 | { |
| 5925 | (void)close(deliver_datafile); |
| 5926 | deliver_datafile = -1; |
| 5927 | log_write(0, LOG_MAIN|LOG_PANIC, "Error in system filter: %s", |
| 5928 | string_printing(filter_message)); |
| 5929 | return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */ |
| 5930 | } |
| 5931 | |
| 5932 | /* Reset things. If the filter message is an empty string, which can happen |
| 5933 | for a filter "fail" or "freeze" command with no text, reset it to NULL. */ |
| 5934 | |
| 5935 | f.system_filtering = FALSE; |
| 5936 | f.enable_dollar_recipients = FALSE; |
| 5937 | if (filter_message && filter_message[0] == 0) filter_message = NULL; |
| 5938 | |
| 5939 | /* Save the values of the system filter variables so that user filters |
| 5940 | can use them. */ |
| 5941 | |
| 5942 | memcpy(filter_sn, filter_n, sizeof(filter_sn)); |
| 5943 | |
| 5944 | /* The filter can request that delivery of the original addresses be |
| 5945 | deferred. */ |
| 5946 | |
| 5947 | if (rc == FF_DEFER) |
| 5948 | { |
| 5949 | process_recipients = RECIP_DEFER; |
| 5950 | deliver_msglog("Delivery deferred by system filter\n"); |
| 5951 | log_write(0, LOG_MAIN, "Delivery deferred by system filter"); |
| 5952 | } |
| 5953 | |
| 5954 | /* The filter can request that a message be frozen, but this does not |
| 5955 | take place if the message has been manually thawed. In that case, we must |
| 5956 | unset "delivered", which is forced by the "freeze" command to make -bF |
| 5957 | work properly. */ |
| 5958 | |
| 5959 | else if (rc == FF_FREEZE && !f.deliver_manual_thaw) |
| 5960 | { |
| 5961 | f.deliver_freeze = TRUE; |
| 5962 | deliver_frozen_at = time(NULL); |
| 5963 | process_recipients = RECIP_DEFER; |
| 5964 | frozen_info = string_sprintf(" by the system filter%s%s", |
| 5965 | filter_message ? US": " : US"", |
| 5966 | filter_message ? filter_message : US""); |
| 5967 | } |
| 5968 | |
| 5969 | /* The filter can request that a message be failed. The error message may be |
| 5970 | quite long - it is sent back to the sender in the bounce - but we don't want |
| 5971 | to fill up the log with repetitions of it. If it starts with << then the text |
| 5972 | between << and >> is written to the log, with the rest left for the bounce |
| 5973 | message. */ |
| 5974 | |
| 5975 | else if (rc == FF_FAIL) |
| 5976 | { |
| 5977 | uschar *colon = US""; |
| 5978 | uschar *logmsg = US""; |
| 5979 | int loglen = 0; |
| 5980 | |
| 5981 | process_recipients = RECIP_FAIL_FILTER; |
| 5982 | |
| 5983 | if (filter_message) |
| 5984 | { |
| 5985 | uschar *logend; |
| 5986 | colon = US": "; |
| 5987 | if ( filter_message[0] == '<' |
| 5988 | && filter_message[1] == '<' |
| 5989 | && (logend = Ustrstr(filter_message, ">>")) |
| 5990 | ) |
| 5991 | { |
| 5992 | logmsg = filter_message + 2; |
| 5993 | loglen = logend - logmsg; |
| 5994 | filter_message = logend + 2; |
| 5995 | if (filter_message[0] == 0) filter_message = NULL; |
| 5996 | } |
| 5997 | else |
| 5998 | { |
| 5999 | logmsg = filter_message; |
| 6000 | loglen = Ustrlen(filter_message); |
| 6001 | } |
| 6002 | } |
| 6003 | |
| 6004 | log_write(0, LOG_MAIN, "cancelled by system filter%s%.*s", colon, loglen, |
| 6005 | logmsg); |
| 6006 | } |
| 6007 | |
| 6008 | /* Delivery can be restricted only to those recipients (if any) that the |
| 6009 | filter specified. */ |
| 6010 | |
| 6011 | else if (rc == FF_DELIVERED) |
| 6012 | { |
| 6013 | process_recipients = RECIP_IGNORE; |
| 6014 | if (addr_new) |
| 6015 | log_write(0, LOG_MAIN, "original recipients ignored (system filter)"); |
| 6016 | else |
| 6017 | log_write(0, LOG_MAIN, "=> discarded (system filter)"); |
| 6018 | } |
| 6019 | |
| 6020 | /* If any new addresses were created by the filter, fake up a "parent" |
| 6021 | for them. This is necessary for pipes, etc., which are expected to have |
| 6022 | parents, and it also gives some sensible logging for others. Allow |
| 6023 | pipes, files, and autoreplies, and run them as the filter uid if set, |
| 6024 | otherwise as the current uid. */ |
| 6025 | |
| 6026 | if (addr_new) |
| 6027 | { |
| 6028 | int uid = system_filter_uid_set ? system_filter_uid : geteuid(); |
| 6029 | int gid = system_filter_gid_set ? system_filter_gid : getegid(); |
| 6030 | |
| 6031 | /* The text "system-filter" is tested in transport_set_up_command() and in |
| 6032 | set_up_shell_command() in the pipe transport, to enable them to permit |
| 6033 | $recipients, so don't change it here without also changing it there. */ |
| 6034 | |
| 6035 | address_item *p = addr_new; |
| 6036 | address_item *parent = deliver_make_addr(US"system-filter", FALSE); |
| 6037 | |
| 6038 | parent->domain = string_copylc(qualify_domain_recipient); |
| 6039 | parent->local_part = US"system-filter"; |
| 6040 | |
| 6041 | /* As part of this loop, we arrange for addr_last to end up pointing |
| 6042 | at the final address. This is used if we go on to add addresses for the |
| 6043 | original recipients. */ |
| 6044 | |
| 6045 | while (p) |
| 6046 | { |
| 6047 | if (parent->child_count == USHRT_MAX) |
| 6048 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "system filter generated more " |
| 6049 | "than %d delivery addresses", USHRT_MAX); |
| 6050 | parent->child_count++; |
| 6051 | p->parent = parent; |
| 6052 | |
| 6053 | if (testflag(p, af_pfr)) |
| 6054 | { |
| 6055 | uschar *tpname; |
| 6056 | uschar *type; |
| 6057 | p->uid = uid; |
| 6058 | p->gid = gid; |
| 6059 | setflag(p, af_uid_set); |
| 6060 | setflag(p, af_gid_set); |
| 6061 | setflag(p, af_allow_file); |
| 6062 | setflag(p, af_allow_pipe); |
| 6063 | setflag(p, af_allow_reply); |
| 6064 | |
| 6065 | /* Find the name of the system filter's appropriate pfr transport */ |
| 6066 | |
| 6067 | if (p->address[0] == '|') |
| 6068 | { |
| 6069 | type = US"pipe"; |
| 6070 | tpname = system_filter_pipe_transport; |
| 6071 | address_pipe = p->address; |
| 6072 | } |
| 6073 | else if (p->address[0] == '>') |
| 6074 | { |
| 6075 | type = US"reply"; |
| 6076 | tpname = system_filter_reply_transport; |
| 6077 | } |
| 6078 | else |
| 6079 | { |
| 6080 | if (p->address[Ustrlen(p->address)-1] == '/') |
| 6081 | { |
| 6082 | type = US"directory"; |
| 6083 | tpname = system_filter_directory_transport; |
| 6084 | } |
| 6085 | else |
| 6086 | { |
| 6087 | type = US"file"; |
| 6088 | tpname = system_filter_file_transport; |
| 6089 | } |
| 6090 | address_file = p->address; |
| 6091 | } |
| 6092 | |
| 6093 | /* Now find the actual transport, first expanding the name. We have |
| 6094 | set address_file or address_pipe above. */ |
| 6095 | |
| 6096 | if (tpname) |
| 6097 | { |
| 6098 | uschar *tmp = expand_string(tpname); |
| 6099 | address_file = address_pipe = NULL; |
| 6100 | if (!tmp) |
| 6101 | p->message = string_sprintf("failed to expand \"%s\" as a " |
| 6102 | "system filter transport name", tpname); |
| 6103 | if (is_tainted(tmp)) |
| 6104 | p->message = string_sprintf("attempt to used tainted value '%s' for" |
| 6105 | "transport '%s' as a system filter", tmp, tpname); |
| 6106 | tpname = tmp; |
| 6107 | } |
| 6108 | else |
| 6109 | p->message = string_sprintf("system_filter_%s_transport is unset", |
| 6110 | type); |
| 6111 | |
| 6112 | if (tpname) |
| 6113 | { |
| 6114 | transport_instance *tp; |
| 6115 | for (tp = transports; tp; tp = tp->next) |
| 6116 | if (Ustrcmp(tp->name, tpname) == 0) |
| 6117 | { |
| 6118 | p->transport = tp; |
| 6119 | break; |
| 6120 | } |
| 6121 | if (!tp) |
| 6122 | p->message = string_sprintf("failed to find \"%s\" transport " |
| 6123 | "for system filter delivery", tpname); |
| 6124 | } |
| 6125 | |
| 6126 | /* If we couldn't set up a transport, defer the delivery, putting the |
| 6127 | error on the panic log as well as the main log. */ |
| 6128 | |
| 6129 | if (!p->transport) |
| 6130 | { |
| 6131 | address_item *badp = p; |
| 6132 | p = p->next; |
| 6133 | if (!addr_last) addr_new = p; else addr_last->next = p; |
| 6134 | badp->local_part = badp->address; /* Needed for log line */ |
| 6135 | post_process_one(badp, DEFER, LOG_MAIN|LOG_PANIC, EXIM_DTYPE_ROUTER, 0); |
| 6136 | continue; |
| 6137 | } |
| 6138 | } /* End of pfr handling */ |
| 6139 | |
| 6140 | /* Either a non-pfr delivery, or we found a transport */ |
| 6141 | |
| 6142 | DEBUG(D_deliver|D_filter) |
| 6143 | debug_printf("system filter added %s\n", p->address); |
| 6144 | |
| 6145 | addr_last = p; |
| 6146 | p = p->next; |
| 6147 | } /* Loop through all addr_new addresses */ |
| 6148 | } |
| 6149 | } |
| 6150 | |
| 6151 | |
| 6152 | /* Scan the recipients list, and for every one that is not in the non- |
| 6153 | recipients tree, add an addr item to the chain of new addresses. If the pno |
| 6154 | value is non-negative, we must set the onetime parent from it. This which |
| 6155 | points to the relevant entry in the recipients list. |
| 6156 | |
| 6157 | This processing can be altered by the setting of the process_recipients |
| 6158 | variable, which is changed if recipients are to be ignored, failed, or |
| 6159 | deferred. This can happen as a result of system filter activity, or if the -Mg |
| 6160 | option is used to fail all of them. |
| 6161 | |
| 6162 | Duplicate addresses are handled later by a different tree structure; we can't |
| 6163 | just extend the non-recipients tree, because that will be re-written to the |
| 6164 | spool if the message is deferred, and in any case there are casing |
| 6165 | complications for local addresses. */ |
| 6166 | |
| 6167 | if (process_recipients != RECIP_IGNORE) |
| 6168 | for (i = 0; i < recipients_count; i++) |
| 6169 | if (!tree_search(tree_nonrecipients, recipients_list[i].address)) |
| 6170 | { |
| 6171 | recipient_item *r = recipients_list + i; |
| 6172 | address_item *new = deliver_make_addr(r->address, FALSE); |
| 6173 | new->prop.errors_address = r->errors_to; |
| 6174 | #ifdef SUPPORT_I18N |
| 6175 | if ((new->prop.utf8_msg = message_smtputf8)) |
| 6176 | { |
| 6177 | new->prop.utf8_downcvt = message_utf8_downconvert == 1; |
| 6178 | new->prop.utf8_downcvt_maybe = message_utf8_downconvert == -1; |
| 6179 | DEBUG(D_deliver) debug_printf("utf8, downconvert %s\n", |
| 6180 | new->prop.utf8_downcvt ? "yes" |
| 6181 | : new->prop.utf8_downcvt_maybe ? "ifneeded" |
| 6182 | : "no"); |
| 6183 | } |
| 6184 | #endif |
| 6185 | |
| 6186 | if (r->pno >= 0) |
| 6187 | new->onetime_parent = recipients_list[r->pno].address; |
| 6188 | |
| 6189 | /* If DSN support is enabled, set the dsn flags and the original receipt |
| 6190 | to be passed on to other DSN enabled MTAs */ |
| 6191 | |
| 6192 | new->dsn_flags = r->dsn_flags & rf_dsnflags; |
| 6193 | new->dsn_orcpt = r->orcpt; |
| 6194 | DEBUG(D_deliver) debug_printf("DSN: set orcpt: %s flags: 0x%x\n", |
| 6195 | new->dsn_orcpt ? new->dsn_orcpt : US"", new->dsn_flags); |
| 6196 | |
| 6197 | switch (process_recipients) |
| 6198 | { |
| 6199 | /* RECIP_DEFER is set when a system filter freezes a message. */ |
| 6200 | |
| 6201 | case RECIP_DEFER: |
| 6202 | new->next = addr_defer; |
| 6203 | addr_defer = new; |
| 6204 | break; |
| 6205 | |
| 6206 | |
| 6207 | /* RECIP_FAIL_FILTER is set when a system filter has obeyed a "fail" |
| 6208 | command. */ |
| 6209 | |
| 6210 | case RECIP_FAIL_FILTER: |
| 6211 | new->message = |
| 6212 | filter_message ? filter_message : US"delivery cancelled"; |
| 6213 | setflag(new, af_pass_message); |
| 6214 | goto RECIP_QUEUE_FAILED; /* below */ |
| 6215 | |
| 6216 | |
| 6217 | /* RECIP_FAIL_TIMEOUT is set when a message is frozen, but is older |
| 6218 | than the value in timeout_frozen_after. Treat non-bounce messages |
| 6219 | similarly to -Mg; for bounce messages we just want to discard, so |
| 6220 | don't put the address on the failed list. The timeout has already |
| 6221 | been logged. */ |
| 6222 | |
| 6223 | case RECIP_FAIL_TIMEOUT: |
| 6224 | new->message = US"delivery cancelled; message timed out"; |
| 6225 | goto RECIP_QUEUE_FAILED; /* below */ |
| 6226 | |
| 6227 | |
| 6228 | /* RECIP_FAIL is set when -Mg has been used. */ |
| 6229 | |
| 6230 | case RECIP_FAIL: |
| 6231 | new->message = US"delivery cancelled by administrator"; |
| 6232 | /* Fall through */ |
| 6233 | |
| 6234 | /* Common code for the failure cases above. If this is not a bounce |
| 6235 | message, put the address on the failed list so that it is used to |
| 6236 | create a bounce. Otherwise do nothing - this just discards the address. |
| 6237 | The incident has already been logged. */ |
| 6238 | |
| 6239 | RECIP_QUEUE_FAILED: |
| 6240 | if (sender_address[0]) |
| 6241 | { |
| 6242 | new->next = addr_failed; |
| 6243 | addr_failed = new; |
| 6244 | } |
| 6245 | break; |
| 6246 | |
| 6247 | |
| 6248 | /* RECIP_FAIL_LOOP is set when there are too many Received: headers |
| 6249 | in the message. Process each address as a routing failure; if this |
| 6250 | is a bounce message, it will get frozen. */ |
| 6251 | |
| 6252 | case RECIP_FAIL_LOOP: |
| 6253 | new->message = US"Too many \"Received\" headers - suspected mail loop"; |
| 6254 | post_process_one(new, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0); |
| 6255 | break; |
| 6256 | |
| 6257 | |
| 6258 | /* Value should be RECIP_ACCEPT; take this as the safe default. */ |
| 6259 | |
| 6260 | default: |
| 6261 | if (!addr_new) addr_new = new; else addr_last->next = new; |
| 6262 | addr_last = new; |
| 6263 | break; |
| 6264 | } |
| 6265 | |
| 6266 | #ifndef DISABLE_EVENT |
| 6267 | if (process_recipients != RECIP_ACCEPT && event_action) |
| 6268 | { |
| 6269 | uschar * save_local = deliver_localpart; |
| 6270 | const uschar * save_domain = deliver_domain; |
| 6271 | uschar * addr = new->address, * errmsg = NULL; |
| 6272 | int start, end, dom; |
| 6273 | |
| 6274 | if (!parse_extract_address(addr, &errmsg, &start, &end, &dom, TRUE)) |
| 6275 | log_write(0, LOG_MAIN|LOG_PANIC, |
| 6276 | "failed to parse address '%.100s': %s\n", addr, errmsg); |
| 6277 | else |
| 6278 | { |
| 6279 | deliver_localpart = |
| 6280 | string_copyn(addr+start, dom ? (dom-1) - start : end - start); |
| 6281 | deliver_domain = dom ? CUS string_copyn(addr+dom, end - dom) : CUS""; |
| 6282 | |
| 6283 | event_raise(event_action, US"msg:fail:internal", new->message); |
| 6284 | |
| 6285 | deliver_localpart = save_local; |
| 6286 | deliver_domain = save_domain; |
| 6287 | } |
| 6288 | } |
| 6289 | #endif |
| 6290 | } |
| 6291 | |
| 6292 | DEBUG(D_deliver) |
| 6293 | { |
| 6294 | debug_printf("Delivery address list:\n"); |
| 6295 | for (address_item * p = addr_new; p; p = p->next) |
| 6296 | debug_printf(" %s %s\n", p->address, |
| 6297 | p->onetime_parent ? p->onetime_parent : US""); |
| 6298 | } |
| 6299 | |
| 6300 | /* Set up the buffers used for copying over the file when delivering. */ |
| 6301 | |
| 6302 | deliver_in_buffer = store_malloc(DELIVER_IN_BUFFER_SIZE); |
| 6303 | deliver_out_buffer = store_malloc(DELIVER_OUT_BUFFER_SIZE); |
| 6304 | |
| 6305 | |
| 6306 | |
| 6307 | /* Until there are no more new addresses, handle each one as follows: |
| 6308 | |
| 6309 | . If this is a generated address (indicated by the presence of a parent |
| 6310 | pointer) then check to see whether it is a pipe, file, or autoreply, and |
| 6311 | if so, handle it directly here. The router that produced the address will |
| 6312 | have set the allow flags into the address, and also set the uid/gid required. |
| 6313 | Having the routers generate new addresses and then checking them here at |
| 6314 | the outer level is tidier than making each router do the checking, and |
| 6315 | means that routers don't need access to the failed address queue. |
| 6316 | |
| 6317 | . Break up the address into local part and domain, and make lowercased |
| 6318 | versions of these strings. We also make unquoted versions of the local part. |
| 6319 | |
| 6320 | . Handle the percent hack for those domains for which it is valid. |
| 6321 | |
| 6322 | . For child addresses, determine if any of the parents have the same address. |
| 6323 | If so, generate a different string for previous delivery checking. Without |
| 6324 | this code, if the address spqr generates spqr via a forward or alias file, |
| 6325 | delivery of the generated spqr stops further attempts at the top level spqr, |
| 6326 | which is not what is wanted - it may have generated other addresses. |
| 6327 | |
| 6328 | . Check on the retry database to see if routing was previously deferred, but |
| 6329 | only if in a queue run. Addresses that are to be routed are put on the |
| 6330 | addr_route chain. Addresses that are to be deferred are put on the |
| 6331 | addr_defer chain. We do all the checking first, so as not to keep the |
| 6332 | retry database open any longer than necessary. |
| 6333 | |
| 6334 | . Now we run the addresses through the routers. A router may put the address |
| 6335 | on either the addr_local or the addr_remote chain for local or remote |
| 6336 | delivery, respectively, or put it on the addr_failed chain if it is |
| 6337 | undeliveable, or it may generate child addresses and put them on the |
| 6338 | addr_new chain, or it may defer an address. All the chain anchors are |
| 6339 | passed as arguments so that the routers can be called for verification |
| 6340 | purposes as well. |
| 6341 | |
| 6342 | . If new addresses have been generated by the routers, da capo. |
| 6343 | */ |
| 6344 | |
| 6345 | f.header_rewritten = FALSE; /* No headers rewritten yet */ |
| 6346 | while (addr_new) /* Loop until all addresses dealt with */ |
| 6347 | { |
| 6348 | address_item *addr, *parent; |
| 6349 | |
| 6350 | /* Failure to open the retry database is treated the same as if it does |
| 6351 | not exist. In both cases, dbm_file is NULL. */ |
| 6352 | |
| 6353 | if (!(dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE, TRUE))) |
| 6354 | DEBUG(D_deliver|D_retry|D_route|D_hints_lookup) |
| 6355 | debug_printf("no retry data available\n"); |
| 6356 | |
| 6357 | /* Scan the current batch of new addresses, to handle pipes, files and |
| 6358 | autoreplies, and determine which others are ready for routing. */ |
| 6359 | |
| 6360 | while (addr_new) |
| 6361 | { |
| 6362 | int rc; |
| 6363 | uschar *p; |
| 6364 | tree_node *tnode; |
| 6365 | dbdata_retry *domain_retry_record; |
| 6366 | dbdata_retry *address_retry_record; |
| 6367 | |
| 6368 | addr = addr_new; |
| 6369 | addr_new = addr->next; |
| 6370 | |
| 6371 | DEBUG(D_deliver|D_retry|D_route) |
| 6372 | { |
| 6373 | debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"); |
| 6374 | debug_printf("Considering: %s\n", addr->address); |
| 6375 | } |
| 6376 | |
| 6377 | /* Handle generated address that is a pipe or a file or an autoreply. */ |
| 6378 | |
| 6379 | if (testflag(addr, af_pfr)) |
| 6380 | { |
| 6381 | /* If an autoreply in a filter could not generate a syntactically valid |
| 6382 | address, give up forthwith. Set af_ignore_error so that we don't try to |
| 6383 | generate a bounce. */ |
| 6384 | |
| 6385 | if (testflag(addr, af_bad_reply)) |
| 6386 | { |
| 6387 | addr->basic_errno = ERRNO_BADADDRESS2; |
| 6388 | addr->local_part = addr->address; |
| 6389 | addr->message = |
| 6390 | US"filter autoreply generated syntactically invalid recipient"; |
| 6391 | addr->prop.ignore_error = TRUE; |
| 6392 | (void) post_process_one(addr, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0); |
| 6393 | continue; /* with the next new address */ |
| 6394 | } |
| 6395 | |
| 6396 | /* If two different users specify delivery to the same pipe or file or |
| 6397 | autoreply, there should be two different deliveries, so build a unique |
| 6398 | string that incorporates the original address, and use this for |
| 6399 | duplicate testing and recording delivery, and also for retrying. */ |
| 6400 | |
| 6401 | addr->unique = |
| 6402 | string_sprintf("%s:%s", addr->address, addr->parent->unique + |
| 6403 | (testflag(addr->parent, af_homonym)? 3:0)); |
| 6404 | |
| 6405 | addr->address_retry_key = addr->domain_retry_key = |
| 6406 | string_sprintf("T:%s", addr->unique); |
| 6407 | |
| 6408 | /* If a filter file specifies two deliveries to the same pipe or file, |
| 6409 | we want to de-duplicate, but this is probably not wanted for two mail |
| 6410 | commands to the same address, where probably both should be delivered. |
| 6411 | So, we have to invent a different unique string in that case. Just |
| 6412 | keep piling '>' characters on the front. */ |
| 6413 | |
| 6414 | if (addr->address[0] == '>') |
| 6415 | while (tree_search(tree_duplicates, addr->unique)) |
| 6416 | addr->unique = string_sprintf(">%s", addr->unique); |
| 6417 | |
| 6418 | else if ((tnode = tree_search(tree_duplicates, addr->unique))) |
| 6419 | { |
| 6420 | DEBUG(D_deliver|D_route) |
| 6421 | debug_printf("%s is a duplicate address: discarded\n", addr->address); |
| 6422 | addr->dupof = tnode->data.ptr; |
| 6423 | addr->next = addr_duplicate; |
| 6424 | addr_duplicate = addr; |
| 6425 | continue; |
| 6426 | } |
| 6427 | |
| 6428 | DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique); |
| 6429 | |
| 6430 | /* Check for previous delivery */ |
| 6431 | |
| 6432 | if (tree_search(tree_nonrecipients, addr->unique)) |
| 6433 | { |
| 6434 | DEBUG(D_deliver|D_route) |
| 6435 | debug_printf("%s was previously delivered: discarded\n", addr->address); |
| 6436 | child_done(addr, tod_stamp(tod_log)); |
| 6437 | continue; |
| 6438 | } |
| 6439 | |
| 6440 | /* Save for checking future duplicates */ |
| 6441 | |
| 6442 | tree_add_duplicate(addr->unique, addr); |
| 6443 | |
| 6444 | /* Set local part and domain */ |
| 6445 | |
| 6446 | addr->local_part = addr->address; |
| 6447 | addr->domain = addr->parent->domain; |
| 6448 | |
| 6449 | /* Ensure that the delivery is permitted. */ |
| 6450 | |
| 6451 | if (testflag(addr, af_file)) |
| 6452 | { |
| 6453 | if (!testflag(addr, af_allow_file)) |
| 6454 | { |
| 6455 | addr->basic_errno = ERRNO_FORBIDFILE; |
| 6456 | addr->message = US"delivery to file forbidden"; |
| 6457 | (void)post_process_one(addr, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0); |
| 6458 | continue; /* with the next new address */ |
| 6459 | } |
| 6460 | } |
| 6461 | else if (addr->address[0] == '|') |
| 6462 | { |
| 6463 | if (!testflag(addr, af_allow_pipe)) |
| 6464 | { |
| 6465 | addr->basic_errno = ERRNO_FORBIDPIPE; |
| 6466 | addr->message = US"delivery to pipe forbidden"; |
| 6467 | (void)post_process_one(addr, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0); |
| 6468 | continue; /* with the next new address */ |
| 6469 | } |
| 6470 | } |
| 6471 | else if (!testflag(addr, af_allow_reply)) |
| 6472 | { |
| 6473 | addr->basic_errno = ERRNO_FORBIDREPLY; |
| 6474 | addr->message = US"autoreply forbidden"; |
| 6475 | (void)post_process_one(addr, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0); |
| 6476 | continue; /* with the next new address */ |
| 6477 | } |
| 6478 | |
| 6479 | /* If the errno field is already set to BADTRANSPORT, it indicates |
| 6480 | failure to expand a transport string, or find the associated transport, |
| 6481 | or an unset transport when one is required. Leave this test till now so |
| 6482 | that the forbid errors are given in preference. */ |
| 6483 | |
| 6484 | if (addr->basic_errno == ERRNO_BADTRANSPORT) |
| 6485 | { |
| 6486 | (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0); |
| 6487 | continue; |
| 6488 | } |
| 6489 | |
| 6490 | /* Treat /dev/null as a special case and abandon the delivery. This |
| 6491 | avoids having to specify a uid on the transport just for this case. |
| 6492 | Arrange for the transport name to be logged as "**bypassed**". */ |
| 6493 | |
| 6494 | if (Ustrcmp(addr->address, "/dev/null") == 0) |
| 6495 | { |
| 6496 | uschar *save = addr->transport->name; |
| 6497 | addr->transport->name = US"**bypassed**"; |
| 6498 | (void)post_process_one(addr, OK, LOG_MAIN, EXIM_DTYPE_TRANSPORT, '='); |
| 6499 | addr->transport->name = save; |
| 6500 | continue; /* with the next new address */ |
| 6501 | } |
| 6502 | |
| 6503 | /* Pipe, file, or autoreply delivery is to go ahead as a normal local |
| 6504 | delivery. */ |
| 6505 | |
| 6506 | DEBUG(D_deliver|D_route) |
| 6507 | debug_printf("queued for %s transport\n", addr->transport->name); |
| 6508 | addr->next = addr_local; |
| 6509 | addr_local = addr; |
| 6510 | continue; /* with the next new address */ |
| 6511 | } |
| 6512 | |
| 6513 | /* Handle normal addresses. First, split up into local part and domain, |
| 6514 | handling the %-hack if necessary. There is the possibility of a defer from |
| 6515 | a lookup in percent_hack_domains. */ |
| 6516 | |
| 6517 | if ((rc = deliver_split_address(addr)) == DEFER) |
| 6518 | { |
| 6519 | addr->message = US"cannot check percent_hack_domains"; |
| 6520 | addr->basic_errno = ERRNO_LISTDEFER; |
| 6521 | (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_NONE, 0); |
| 6522 | continue; |
| 6523 | } |
| 6524 | |
| 6525 | /* Check to see if the domain is held. If so, proceed only if the |
| 6526 | delivery was forced by hand. */ |
| 6527 | |
| 6528 | deliver_domain = addr->domain; /* set $domain */ |
| 6529 | if ( !forced && hold_domains |
| 6530 | && (rc = match_isinlist(addr->domain, (const uschar **)&hold_domains, 0, |
| 6531 | &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, |
| 6532 | NULL)) != FAIL |
| 6533 | ) |
| 6534 | { |
| 6535 | if (rc == DEFER) |
| 6536 | { |
| 6537 | addr->message = US"hold_domains lookup deferred"; |
| 6538 | addr->basic_errno = ERRNO_LISTDEFER; |
| 6539 | } |
| 6540 | else |
| 6541 | { |
| 6542 | addr->message = US"domain is held"; |
| 6543 | addr->basic_errno = ERRNO_HELD; |
| 6544 | } |
| 6545 | (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_NONE, 0); |
| 6546 | continue; |
| 6547 | } |
| 6548 | |
| 6549 | /* Now we can check for duplicates and previously delivered addresses. In |
| 6550 | order to do this, we have to generate a "unique" value for each address, |
| 6551 | because there may be identical actual addresses in a line of descendents. |
| 6552 | The "unique" field is initialized to the same value as the "address" field, |
| 6553 | but gets changed here to cope with identically-named descendents. */ |
| 6554 | |
| 6555 | for (parent = addr->parent; parent; parent = parent->parent) |
| 6556 | if (strcmpic(addr->address, parent->address) == 0) break; |
| 6557 | |
| 6558 | /* If there's an ancestor with the same name, set the homonym flag. This |
| 6559 | influences how deliveries are recorded. Then add a prefix on the front of |
| 6560 | the unique address. We use \n\ where n starts at 0 and increases each time. |
| 6561 | It is unlikely to pass 9, but if it does, it may look odd but will still |
| 6562 | work. This means that siblings or cousins with the same names are treated |
| 6563 | as duplicates, which is what we want. */ |
| 6564 | |
| 6565 | if (parent) |
| 6566 | { |
| 6567 | setflag(addr, af_homonym); |
| 6568 | if (parent->unique[0] != '\\') |
| 6569 | addr->unique = string_sprintf("\\0\\%s", addr->address); |
| 6570 | else |
| 6571 | addr->unique = string_sprintf("\\%c\\%s", parent->unique[1] + 1, |
| 6572 | addr->address); |
| 6573 | } |
| 6574 | |
| 6575 | /* Ensure that the domain in the unique field is lower cased, because |
| 6576 | domains are always handled caselessly. */ |
| 6577 | |
| 6578 | p = Ustrrchr(addr->unique, '@'); |
| 6579 | while (*p != 0) { *p = tolower(*p); p++; } |
| 6580 | |
| 6581 | DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique); |
| 6582 | |
| 6583 | if (tree_search(tree_nonrecipients, addr->unique)) |
| 6584 | { |
| 6585 | DEBUG(D_deliver|D_route) |
| 6586 | debug_printf("%s was previously delivered: discarded\n", addr->unique); |
| 6587 | child_done(addr, tod_stamp(tod_log)); |
| 6588 | continue; |
| 6589 | } |
| 6590 | |
| 6591 | /* Get the routing retry status, saving the two retry keys (with and |
| 6592 | without the local part) for subsequent use. If there is no retry record for |
| 6593 | the standard address routing retry key, we look for the same key with the |
| 6594 | sender attached, because this form is used by the smtp transport after a |
| 6595 | 4xx response to RCPT when address_retry_include_sender is true. */ |
| 6596 | |
| 6597 | addr->domain_retry_key = string_sprintf("R:%s", addr->domain); |
| 6598 | addr->address_retry_key = string_sprintf("R:%s@%s", addr->local_part, |
| 6599 | addr->domain); |
| 6600 | |
| 6601 | if (dbm_file) |
| 6602 | { |
| 6603 | domain_retry_record = dbfn_read(dbm_file, addr->domain_retry_key); |
| 6604 | if ( domain_retry_record |
| 6605 | && now - domain_retry_record->time_stamp > retry_data_expire |
| 6606 | ) |
| 6607 | { |
| 6608 | DEBUG(D_deliver|D_retry) |
| 6609 | debug_printf("domain retry record present but expired\n"); |
| 6610 | domain_retry_record = NULL; /* Ignore if too old */ |
| 6611 | } |
| 6612 | |
| 6613 | address_retry_record = dbfn_read(dbm_file, addr->address_retry_key); |
| 6614 | if ( address_retry_record |
| 6615 | && now - address_retry_record->time_stamp > retry_data_expire |
| 6616 | ) |
| 6617 | { |
| 6618 | DEBUG(D_deliver|D_retry) |
| 6619 | debug_printf("address retry record present but expired\n"); |
| 6620 | address_retry_record = NULL; /* Ignore if too old */ |
| 6621 | } |
| 6622 | |
| 6623 | if (!address_retry_record) |
| 6624 | { |
| 6625 | uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key, |
| 6626 | sender_address); |
| 6627 | address_retry_record = dbfn_read(dbm_file, altkey); |
| 6628 | if ( address_retry_record |
| 6629 | && now - address_retry_record->time_stamp > retry_data_expire) |
| 6630 | { |
| 6631 | DEBUG(D_deliver|D_retry) |
| 6632 | debug_printf("address<sender> retry record present but expired\n"); |
| 6633 | address_retry_record = NULL; /* Ignore if too old */ |
| 6634 | } |
| 6635 | } |
| 6636 | } |
| 6637 | else |
| 6638 | domain_retry_record = address_retry_record = NULL; |
| 6639 | |
| 6640 | DEBUG(D_deliver|D_retry) |
| 6641 | { |
| 6642 | if (!domain_retry_record) |
| 6643 | debug_printf("no domain retry record\n"); |
| 6644 | else |
| 6645 | debug_printf("have domain retry record; next_try = now%+d\n", |
| 6646 | f.running_in_test_harness ? 0 : |
| 6647 | (int)(domain_retry_record->next_try - now)); |
| 6648 | |
| 6649 | if (!address_retry_record) |
| 6650 | debug_printf("no address retry record\n"); |
| 6651 | else |
| 6652 | debug_printf("have address retry record; next_try = now%+d\n", |
| 6653 | f.running_in_test_harness ? 0 : |
| 6654 | (int)(address_retry_record->next_try - now)); |
| 6655 | } |
| 6656 | |
| 6657 | /* If we are sending a message down an existing SMTP connection, we must |
| 6658 | assume that the message which created the connection managed to route |
| 6659 | an address to that connection. We do not want to run the risk of taking |
| 6660 | a long time over routing here, because if we do, the server at the other |
| 6661 | end of the connection may time it out. This is especially true for messages |
| 6662 | with lots of addresses. For this kind of delivery, queue_running is not |
| 6663 | set, so we would normally route all addresses. We take a pragmatic approach |
| 6664 | and defer routing any addresses that have any kind of domain retry record. |
| 6665 | That is, we don't even look at their retry times. It doesn't matter if this |
| 6666 | doesn't work occasionally. This is all just an optimization, after all. |
| 6667 | |
| 6668 | The reason for not doing the same for address retries is that they normally |
| 6669 | arise from 4xx responses, not DNS timeouts. */ |
| 6670 | |
| 6671 | if (continue_hostname && domain_retry_record) |
| 6672 | { |
| 6673 | addr->message = US"reusing SMTP connection skips previous routing defer"; |
| 6674 | addr->basic_errno = ERRNO_RRETRY; |
| 6675 | (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0); |
| 6676 | |
| 6677 | addr->message = domain_retry_record->text; |
| 6678 | setflag(addr, af_pass_message); |
| 6679 | } |
| 6680 | |
| 6681 | /* If we are in a queue run, defer routing unless there is no retry data or |
| 6682 | we've passed the next retry time, or this message is forced. In other |
| 6683 | words, ignore retry data when not in a queue run. |
| 6684 | |
| 6685 | However, if the domain retry time has expired, always allow the routing |
| 6686 | attempt. If it fails again, the address will be failed. This ensures that |
| 6687 | each address is routed at least once, even after long-term routing |
| 6688 | failures. |
| 6689 | |
| 6690 | If there is an address retry, check that too; just wait for the next |
| 6691 | retry time. This helps with the case when the temporary error on the |
| 6692 | address was really message-specific rather than address specific, since |
| 6693 | it allows other messages through. |
| 6694 | |
| 6695 | We also wait for the next retry time if this is a message sent down an |
| 6696 | existing SMTP connection (even though that will be forced). Otherwise there |
| 6697 | will be far too many attempts for an address that gets a 4xx error. In |
| 6698 | fact, after such an error, we should not get here because, the host should |
| 6699 | not be remembered as one this message needs. However, there was a bug that |
| 6700 | used to cause this to happen, so it is best to be on the safe side. |
| 6701 | |
| 6702 | Even if we haven't reached the retry time in the hints, there is one more |
| 6703 | check to do, which is for the ultimate address timeout. We only do this |
| 6704 | check if there is an address retry record and there is not a domain retry |
| 6705 | record; this implies that previous attempts to handle the address had the |
| 6706 | retry_use_local_parts option turned on. We use this as an approximation |
| 6707 | for the destination being like a local delivery, for example delivery over |
| 6708 | LMTP to an IMAP message store. In this situation users are liable to bump |
| 6709 | into their quota and thereby have intermittently successful deliveries, |
| 6710 | which keep the retry record fresh, which can lead to us perpetually |
| 6711 | deferring messages. */ |
| 6712 | |
| 6713 | else if ( ( f.queue_running && !f.deliver_force |
| 6714 | || continue_hostname |
| 6715 | ) |
| 6716 | && ( ( domain_retry_record |
| 6717 | && now < domain_retry_record->next_try |
| 6718 | && !domain_retry_record->expired |
| 6719 | ) |
| 6720 | || ( address_retry_record |
| 6721 | && now < address_retry_record->next_try |
| 6722 | ) ) |
| 6723 | && ( domain_retry_record |
| 6724 | || !address_retry_record |
| 6725 | || !retry_ultimate_address_timeout(addr->address_retry_key, |
| 6726 | addr->domain, address_retry_record, now) |
| 6727 | ) ) |
| 6728 | { |
| 6729 | addr->message = US"retry time not reached"; |
| 6730 | addr->basic_errno = ERRNO_RRETRY; |
| 6731 | (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0); |
| 6732 | |
| 6733 | /* For remote-retry errors (here and just above) that we've not yet |
| 6734 | hit the retry time, use the error recorded in the retry database |
| 6735 | as info in the warning message. This lets us send a message even |
| 6736 | when we're not failing on a fresh attempt. We assume that this |
| 6737 | info is not sensitive. */ |
| 6738 | |
| 6739 | addr->message = domain_retry_record |
| 6740 | ? domain_retry_record->text : address_retry_record->text; |
| 6741 | setflag(addr, af_pass_message); |
| 6742 | } |
| 6743 | |
| 6744 | /* The domain is OK for routing. Remember if retry data exists so it |
| 6745 | can be cleaned up after a successful delivery. */ |
| 6746 | |
| 6747 | else |
| 6748 | { |
| 6749 | if (domain_retry_record || address_retry_record) |
| 6750 | setflag(addr, af_dr_retry_exists); |
| 6751 | addr->next = addr_route; |
| 6752 | addr_route = addr; |
| 6753 | DEBUG(D_deliver|D_route) |
| 6754 | debug_printf("%s: queued for routing\n", addr->address); |
| 6755 | } |
| 6756 | } |
| 6757 | |
| 6758 | /* The database is closed while routing is actually happening. Requests to |
| 6759 | update it are put on a chain and all processed together at the end. */ |
| 6760 | |
| 6761 | if (dbm_file) dbfn_close(dbm_file); |
| 6762 | |
| 6763 | /* If queue_domains is set, we don't even want to try routing addresses in |
| 6764 | those domains. During queue runs, queue_domains is forced to be unset. |
| 6765 | Optimize by skipping this pass through the addresses if nothing is set. */ |
| 6766 | |
| 6767 | if (!f.deliver_force && queue_domains) |
| 6768 | { |
| 6769 | address_item *okaddr = NULL; |
| 6770 | while (addr_route) |
| 6771 | { |
| 6772 | address_item *addr = addr_route; |
| 6773 | addr_route = addr->next; |
| 6774 | |
| 6775 | deliver_domain = addr->domain; /* set $domain */ |
| 6776 | if ((rc = match_isinlist(addr->domain, (const uschar **)&queue_domains, 0, |
| 6777 | &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL)) |
| 6778 | != OK) |
| 6779 | if (rc == DEFER) |
| 6780 | { |
| 6781 | addr->basic_errno = ERRNO_LISTDEFER; |
| 6782 | addr->message = US"queue_domains lookup deferred"; |
| 6783 | (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0); |
| 6784 | } |
| 6785 | else |
| 6786 | { |
| 6787 | addr->next = okaddr; |
| 6788 | okaddr = addr; |
| 6789 | } |
| 6790 | else |
| 6791 | { |
| 6792 | addr->basic_errno = ERRNO_QUEUE_DOMAIN; |
| 6793 | addr->message = US"domain is in queue_domains"; |
| 6794 | (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0); |
| 6795 | } |
| 6796 | } |
| 6797 | |
| 6798 | addr_route = okaddr; |
| 6799 | } |
| 6800 | |
| 6801 | /* Now route those addresses that are not deferred. */ |
| 6802 | |
| 6803 | while (addr_route) |
| 6804 | { |
| 6805 | int rc; |
| 6806 | address_item *addr = addr_route; |
| 6807 | const uschar *old_domain = addr->domain; |
| 6808 | uschar *old_unique = addr->unique; |
| 6809 | addr_route = addr->next; |
| 6810 | addr->next = NULL; |
| 6811 | |
| 6812 | /* Just in case some router parameter refers to it. */ |
| 6813 | |
| 6814 | if (!(return_path = addr->prop.errors_address)) |
| 6815 | return_path = sender_address; |
| 6816 | |
| 6817 | /* If a router defers an address, add a retry item. Whether or not to |
| 6818 | use the local part in the key is a property of the router. */ |
| 6819 | |
| 6820 | if ((rc = route_address(addr, &addr_local, &addr_remote, &addr_new, |
| 6821 | &addr_succeed, v_none)) == DEFER) |
| 6822 | retry_add_item(addr, |
| 6823 | addr->router->retry_use_local_part |
| 6824 | ? string_sprintf("R:%s@%s", addr->local_part, addr->domain) |
| 6825 | : string_sprintf("R:%s", addr->domain), |
| 6826 | 0); |
| 6827 | |
| 6828 | /* Otherwise, if there is an existing retry record in the database, add |
| 6829 | retry items to delete both forms. We must also allow for the possibility |
| 6830 | of a routing retry that includes the sender address. Since the domain might |
| 6831 | have been rewritten (expanded to fully qualified) as a result of routing, |
| 6832 | ensure that the rewritten form is also deleted. */ |
| 6833 | |
| 6834 | else if (testflag(addr, af_dr_retry_exists)) |
| 6835 | { |
| 6836 | uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key, |
| 6837 | sender_address); |
| 6838 | retry_add_item(addr, altkey, rf_delete); |
| 6839 | retry_add_item(addr, addr->address_retry_key, rf_delete); |
| 6840 | retry_add_item(addr, addr->domain_retry_key, rf_delete); |
| 6841 | if (Ustrcmp(addr->domain, old_domain) != 0) |
| 6842 | retry_add_item(addr, string_sprintf("R:%s", old_domain), rf_delete); |
| 6843 | } |
| 6844 | |
| 6845 | /* DISCARD is given for :blackhole: and "seen finish". The event has been |
| 6846 | logged, but we need to ensure the address (and maybe parents) is marked |
| 6847 | done. */ |
| 6848 | |
| 6849 | if (rc == DISCARD) |
| 6850 | { |
| 6851 | address_done(addr, tod_stamp(tod_log)); |
| 6852 | continue; /* route next address */ |
| 6853 | } |
| 6854 | |
| 6855 | /* The address is finished with (failed or deferred). */ |
| 6856 | |
| 6857 | if (rc != OK) |
| 6858 | { |
| 6859 | (void)post_process_one(addr, rc, LOG_MAIN, EXIM_DTYPE_ROUTER, 0); |
| 6860 | continue; /* route next address */ |
| 6861 | } |
| 6862 | |
| 6863 | /* The address has been routed. If the router changed the domain, it will |
| 6864 | also have changed the unique address. We have to test whether this address |
| 6865 | has already been delivered, because it's the unique address that finally |
| 6866 | gets recorded. */ |
| 6867 | |
| 6868 | if ( addr->unique != old_unique |
| 6869 | && tree_search(tree_nonrecipients, addr->unique) != 0 |
| 6870 | ) |
| 6871 | { |
| 6872 | DEBUG(D_deliver|D_route) debug_printf("%s was previously delivered: " |
| 6873 | "discarded\n", addr->address); |
| 6874 | if (addr_remote == addr) addr_remote = addr->next; |
| 6875 | else if (addr_local == addr) addr_local = addr->next; |
| 6876 | } |
| 6877 | |
| 6878 | /* If the router has same_domain_copy_routing set, we are permitted to copy |
| 6879 | the routing for any other addresses with the same domain. This is an |
| 6880 | optimisation to save repeated DNS lookups for "standard" remote domain |
| 6881 | routing. The option is settable only on routers that generate host lists. |
| 6882 | We play it very safe, and do the optimization only if the address is routed |
| 6883 | to a remote transport, there are no header changes, and the domain was not |
| 6884 | modified by the router. */ |
| 6885 | |
| 6886 | if ( addr_remote == addr |
| 6887 | && addr->router->same_domain_copy_routing |
| 6888 | && !addr->prop.extra_headers |
| 6889 | && !addr->prop.remove_headers |
| 6890 | && old_domain == addr->domain |
| 6891 | ) |
| 6892 | { |
| 6893 | address_item **chain = &addr_route; |
| 6894 | while (*chain) |
| 6895 | { |
| 6896 | address_item *addr2 = *chain; |
| 6897 | if (Ustrcmp(addr2->domain, addr->domain) != 0) |
| 6898 | { |
| 6899 | chain = &(addr2->next); |
| 6900 | continue; |
| 6901 | } |
| 6902 | |
| 6903 | /* Found a suitable address; take it off the routing list and add it to |
| 6904 | the remote delivery list. */ |
| 6905 | |
| 6906 | *chain = addr2->next; |
| 6907 | addr2->next = addr_remote; |
| 6908 | addr_remote = addr2; |
| 6909 | |
| 6910 | /* Copy the routing data */ |
| 6911 | |
| 6912 | addr2->domain = addr->domain; |
| 6913 | addr2->router = addr->router; |
| 6914 | addr2->transport = addr->transport; |
| 6915 | addr2->host_list = addr->host_list; |
| 6916 | addr2->fallback_hosts = addr->fallback_hosts; |
| 6917 | addr2->prop.errors_address = addr->prop.errors_address; |
| 6918 | copyflag(addr2, addr, af_hide_child); |
| 6919 | copyflag(addr2, addr, af_local_host_removed); |
| 6920 | |
| 6921 | DEBUG(D_deliver|D_route) |
| 6922 | debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n" |
| 6923 | "routing %s\n" |
| 6924 | "Routing for %s copied from %s\n", |
| 6925 | addr2->address, addr2->address, addr->address); |
| 6926 | } |
| 6927 | } |
| 6928 | } /* Continue with routing the next address. */ |
| 6929 | } /* Loop to process any child addresses that the routers created, and |
| 6930 | any rerouted addresses that got put back on the new chain. */ |
| 6931 | |
| 6932 | |
| 6933 | /* Debugging: show the results of the routing */ |
| 6934 | |
| 6935 | DEBUG(D_deliver|D_retry|D_route) |
| 6936 | { |
| 6937 | debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"); |
| 6938 | debug_printf("After routing:\n Local deliveries:\n"); |
| 6939 | for (address_item * p = addr_local; p; p = p->next) |
| 6940 | debug_printf(" %s\n", p->address); |
| 6941 | |
| 6942 | debug_printf(" Remote deliveries:\n"); |
| 6943 | for (address_item * p = addr_remote; p; p = p->next) |
| 6944 | debug_printf(" %s\n", p->address); |
| 6945 | |
| 6946 | debug_printf(" Failed addresses:\n"); |
| 6947 | for (address_item * p = addr_failed; p; p = p->next) |
| 6948 | debug_printf(" %s\n", p->address); |
| 6949 | |
| 6950 | debug_printf(" Deferred addresses:\n"); |
| 6951 | for (address_item * p = addr_defer; p; p = p->next) |
| 6952 | debug_printf(" %s\n", p->address); |
| 6953 | } |
| 6954 | |
| 6955 | /* Free any resources that were cached during routing. */ |
| 6956 | |
| 6957 | search_tidyup(); |
| 6958 | route_tidyup(); |
| 6959 | |
| 6960 | /* These two variables are set only during routing, after check_local_user. |
| 6961 | Ensure they are not set in transports. */ |
| 6962 | |
| 6963 | local_user_gid = (gid_t)(-1); |
| 6964 | local_user_uid = (uid_t)(-1); |
| 6965 | |
| 6966 | /* Check for any duplicate addresses. This check is delayed until after |
| 6967 | routing, because the flexibility of the routing configuration means that |
| 6968 | identical addresses with different parentage may end up being redirected to |
| 6969 | different addresses. Checking for duplicates too early (as we previously used |
| 6970 | to) makes this kind of thing not work. */ |
| 6971 | |
| 6972 | do_duplicate_check(&addr_local); |
| 6973 | do_duplicate_check(&addr_remote); |
| 6974 | |
| 6975 | /* When acting as an MUA wrapper, we proceed only if all addresses route to a |
| 6976 | remote transport. The check that they all end up in one transaction happens in |
| 6977 | the do_remote_deliveries() function. */ |
| 6978 | |
| 6979 | if ( mua_wrapper |
| 6980 | && (addr_local || addr_failed || addr_defer) |
| 6981 | ) |
| 6982 | { |
| 6983 | address_item *addr; |
| 6984 | uschar *which, *colon, *msg; |
| 6985 | |
| 6986 | if (addr_local) |
| 6987 | { |
| 6988 | addr = addr_local; |
| 6989 | which = US"local"; |
| 6990 | } |
| 6991 | else if (addr_defer) |
| 6992 | { |
| 6993 | addr = addr_defer; |
| 6994 | which = US"deferred"; |
| 6995 | } |
| 6996 | else |
| 6997 | { |
| 6998 | addr = addr_failed; |
| 6999 | which = US"failed"; |
| 7000 | } |
| 7001 | |
| 7002 | while (addr->parent) addr = addr->parent; |
| 7003 | |
| 7004 | if (addr->message) |
| 7005 | { |
| 7006 | colon = US": "; |
| 7007 | msg = addr->message; |
| 7008 | } |
| 7009 | else colon = msg = US""; |
| 7010 | |
| 7011 | /* We don't need to log here for a forced failure as it will already |
| 7012 | have been logged. Defer will also have been logged, but as a defer, so we do |
| 7013 | need to do the failure logging. */ |
| 7014 | |
| 7015 | if (addr != addr_failed) |
| 7016 | log_write(0, LOG_MAIN, "** %s routing yielded a %s delivery", |
| 7017 | addr->address, which); |
| 7018 | |
| 7019 | /* Always write an error to the caller */ |
| 7020 | |
| 7021 | fprintf(stderr, "routing %s yielded a %s delivery%s%s\n", addr->address, |
| 7022 | which, colon, msg); |
| 7023 | |
| 7024 | final_yield = DELIVER_MUA_FAILED; |
| 7025 | addr_failed = addr_defer = NULL; /* So that we remove the message */ |
| 7026 | goto DELIVERY_TIDYUP; |
| 7027 | } |
| 7028 | |
| 7029 | |
| 7030 | /* If this is a run to continue deliveries to an external channel that is |
| 7031 | already set up, defer any local deliveries. */ |
| 7032 | |
| 7033 | if (continue_transport) |
| 7034 | { |
| 7035 | if (addr_defer) |
| 7036 | { |
| 7037 | address_item *addr = addr_defer; |
| 7038 | while (addr->next) addr = addr->next; |
| 7039 | addr->next = addr_local; |
| 7040 | } |
| 7041 | else |
| 7042 | addr_defer = addr_local; |
| 7043 | addr_local = NULL; |
| 7044 | } |
| 7045 | |
| 7046 | |
| 7047 | /* Because address rewriting can happen in the routers, we should not really do |
| 7048 | ANY deliveries until all addresses have been routed, so that all recipients of |
| 7049 | the message get the same headers. However, this is in practice not always |
| 7050 | possible, since sometimes remote addresses give DNS timeouts for days on end. |
| 7051 | The pragmatic approach is to deliver what we can now, saving any rewritten |
| 7052 | headers so that at least the next lot of recipients benefit from the rewriting |
| 7053 | that has already been done. |
| 7054 | |
| 7055 | If any headers have been rewritten during routing, update the spool file to |
| 7056 | remember them for all subsequent deliveries. This can be delayed till later if |
| 7057 | there is only address to be delivered - if it succeeds the spool write need not |
| 7058 | happen. */ |
| 7059 | |
| 7060 | if ( f.header_rewritten |
| 7061 | && ( addr_local && (addr_local->next || addr_remote) |
| 7062 | || addr_remote && addr_remote->next |
| 7063 | ) ) |
| 7064 | { |
| 7065 | /* Panic-dies on error */ |
| 7066 | (void)spool_write_header(message_id, SW_DELIVERING, NULL); |
| 7067 | f.header_rewritten = FALSE; |
| 7068 | } |
| 7069 | |
| 7070 | |
| 7071 | /* If there are any deliveries to do and we do not already have the journal |
| 7072 | file, create it. This is used to record successful deliveries as soon as |
| 7073 | possible after each delivery is known to be complete. A file opened with |
| 7074 | O_APPEND is used so that several processes can run simultaneously. |
| 7075 | |
| 7076 | The journal is just insurance against crashes. When the spool file is |
| 7077 | ultimately updated at the end of processing, the journal is deleted. If a |
| 7078 | journal is found to exist at the start of delivery, the addresses listed |
| 7079 | therein are added to the non-recipients. */ |
| 7080 | |
| 7081 | if (addr_local || addr_remote) |
| 7082 | { |
| 7083 | if (journal_fd < 0) |
| 7084 | { |
| 7085 | uschar * fname = spool_fname(US"input", message_subdir, id, US"-J"); |
| 7086 | |
| 7087 | if ((journal_fd = Uopen(fname, |
| 7088 | #ifdef O_CLOEXEC |
| 7089 | O_CLOEXEC | |
| 7090 | #endif |
| 7091 | O_WRONLY|O_APPEND|O_CREAT|O_EXCL, SPOOL_MODE)) < 0) |
| 7092 | { |
| 7093 | log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't open journal file %s: %s", |
| 7094 | fname, strerror(errno)); |
| 7095 | return DELIVER_NOT_ATTEMPTED; |
| 7096 | } |
| 7097 | |
| 7098 | /* Set the close-on-exec flag, make the file owned by Exim, and ensure |
| 7099 | that the mode is correct - the group setting doesn't always seem to get |
| 7100 | set automatically. */ |
| 7101 | |
| 7102 | if( exim_fchown(journal_fd, exim_uid, exim_gid, fname) |
| 7103 | || fchmod(journal_fd, SPOOL_MODE) |
| 7104 | #ifndef O_CLOEXEC |
| 7105 | || fcntl(journal_fd, F_SETFD, fcntl(journal_fd, F_GETFD) | FD_CLOEXEC) |
| 7106 | #endif |
| 7107 | ) |
| 7108 | { |
| 7109 | int ret = Uunlink(fname); |
| 7110 | log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't set perms on journal file %s: %s", |
| 7111 | fname, strerror(errno)); |
| 7112 | if(ret && errno != ENOENT) |
| 7113 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s", |
| 7114 | fname, strerror(errno)); |
| 7115 | return DELIVER_NOT_ATTEMPTED; |
| 7116 | } |
| 7117 | } |
| 7118 | } |
| 7119 | else if (journal_fd >= 0) |
| 7120 | { |
| 7121 | close(journal_fd); |
| 7122 | journal_fd = -1; |
| 7123 | } |
| 7124 | |
| 7125 | |
| 7126 | |
| 7127 | /* Now we can get down to the business of actually doing deliveries. Local |
| 7128 | deliveries are done first, then remote ones. If ever the problems of how to |
| 7129 | handle fallback transports are figured out, this section can be put into a loop |
| 7130 | for handling fallbacks, though the uid switching will have to be revised. */ |
| 7131 | |
| 7132 | /* Precompile a regex that is used to recognize a parameter in response |
| 7133 | to an LHLO command, if is isn't already compiled. This may be used on both |
| 7134 | local and remote LMTP deliveries. */ |
| 7135 | |
| 7136 | if (!regex_IGNOREQUOTA) |
| 7137 | regex_IGNOREQUOTA = |
| 7138 | regex_must_compile(US"\\n250[\\s\\-]IGNOREQUOTA(\\s|\\n|$)", FALSE, TRUE); |
| 7139 | |
| 7140 | /* Handle local deliveries */ |
| 7141 | |
| 7142 | if (addr_local) |
| 7143 | { |
| 7144 | DEBUG(D_deliver|D_transport) |
| 7145 | debug_printf(">>>>>>>>>>>>>>>> Local deliveries >>>>>>>>>>>>>>>>\n"); |
| 7146 | do_local_deliveries(); |
| 7147 | f.disable_logging = FALSE; |
| 7148 | } |
| 7149 | |
| 7150 | /* If queue_run_local is set, we do not want to attempt any remote deliveries, |
| 7151 | so just queue them all. */ |
| 7152 | |
| 7153 | if (f.queue_run_local) |
| 7154 | while (addr_remote) |
| 7155 | { |
| 7156 | address_item *addr = addr_remote; |
| 7157 | addr_remote = addr->next; |
| 7158 | addr->next = NULL; |
| 7159 | addr->basic_errno = ERRNO_LOCAL_ONLY; |
| 7160 | addr->message = US"remote deliveries suppressed"; |
| 7161 | (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_TRANSPORT, 0); |
| 7162 | } |
| 7163 | |
| 7164 | /* Handle remote deliveries */ |
| 7165 | |
| 7166 | if (addr_remote) |
| 7167 | { |
| 7168 | DEBUG(D_deliver|D_transport) |
| 7169 | debug_printf(">>>>>>>>>>>>>>>> Remote deliveries >>>>>>>>>>>>>>>>\n"); |
| 7170 | |
| 7171 | /* Precompile some regex that are used to recognize parameters in response |
| 7172 | to an EHLO command, if they aren't already compiled. */ |
| 7173 | |
| 7174 | smtp_deliver_init(); |
| 7175 | |
| 7176 | /* Now sort the addresses if required, and do the deliveries. The yield of |
| 7177 | do_remote_deliveries is FALSE when mua_wrapper is set and all addresses |
| 7178 | cannot be delivered in one transaction. */ |
| 7179 | |
| 7180 | if (remote_sort_domains) sort_remote_deliveries(); |
| 7181 | if (!do_remote_deliveries(FALSE)) |
| 7182 | { |
| 7183 | log_write(0, LOG_MAIN, "** mua_wrapper is set but recipients cannot all " |
| 7184 | "be delivered in one transaction"); |
| 7185 | fprintf(stderr, "delivery to smarthost failed (configuration problem)\n"); |
| 7186 | |
| 7187 | final_yield = DELIVER_MUA_FAILED; |
| 7188 | addr_failed = addr_defer = NULL; /* So that we remove the message */ |
| 7189 | goto DELIVERY_TIDYUP; |
| 7190 | } |
| 7191 | |
| 7192 | /* See if any of the addresses that failed got put on the queue for delivery |
| 7193 | to their fallback hosts. We do it this way because often the same fallback |
| 7194 | host is used for many domains, so all can be sent in a single transaction |
| 7195 | (if appropriately configured). */ |
| 7196 | |
| 7197 | if (addr_fallback && !mua_wrapper) |
| 7198 | { |
| 7199 | DEBUG(D_deliver) debug_printf("Delivering to fallback hosts\n"); |
| 7200 | addr_remote = addr_fallback; |
| 7201 | addr_fallback = NULL; |
| 7202 | if (remote_sort_domains) sort_remote_deliveries(); |
| 7203 | do_remote_deliveries(TRUE); |
| 7204 | } |
| 7205 | f.disable_logging = FALSE; |
| 7206 | } |
| 7207 | |
| 7208 | |
| 7209 | /* All deliveries are now complete. Ignore SIGTERM during this tidying up |
| 7210 | phase, to minimize cases of half-done things. */ |
| 7211 | |
| 7212 | DEBUG(D_deliver) |
| 7213 | debug_printf(">>>>>>>>>>>>>>>> deliveries are done >>>>>>>>>>>>>>>>\n"); |
| 7214 | cancel_cutthrough_connection(TRUE, US"deliveries are done"); |
| 7215 | |
| 7216 | /* Root privilege is no longer needed */ |
| 7217 | |
| 7218 | exim_setugid(exim_uid, exim_gid, FALSE, US"post-delivery tidying"); |
| 7219 | |
| 7220 | set_process_info("tidying up after delivering %s", message_id); |
| 7221 | signal(SIGTERM, SIG_IGN); |
| 7222 | |
| 7223 | /* When we are acting as an MUA wrapper, the smtp transport will either have |
| 7224 | succeeded for all addresses, or failed them all in normal cases. However, there |
| 7225 | are some setup situations (e.g. when a named port does not exist) that cause an |
| 7226 | immediate exit with deferral of all addresses. Convert those into failures. We |
| 7227 | do not ever want to retry, nor do we want to send a bounce message. */ |
| 7228 | |
| 7229 | if (mua_wrapper) |
| 7230 | { |
| 7231 | if (addr_defer) |
| 7232 | { |
| 7233 | address_item * nextaddr; |
| 7234 | for (address_item * addr = addr_defer; addr; addr = nextaddr) |
| 7235 | { |
| 7236 | log_write(0, LOG_MAIN, "** %s mua_wrapper forced failure for deferred " |
| 7237 | "delivery", addr->address); |
| 7238 | nextaddr = addr->next; |
| 7239 | addr->next = addr_failed; |
| 7240 | addr_failed = addr; |
| 7241 | } |
| 7242 | addr_defer = NULL; |
| 7243 | } |
| 7244 | |
| 7245 | /* Now all should either have succeeded or failed. */ |
| 7246 | |
| 7247 | if (!addr_failed) |
| 7248 | final_yield = DELIVER_MUA_SUCCEEDED; |
| 7249 | else |
| 7250 | { |
| 7251 | host_item * host; |
| 7252 | uschar *s = addr_failed->user_message; |
| 7253 | |
| 7254 | if (!s) s = addr_failed->message; |
| 7255 | |
| 7256 | fprintf(stderr, "Delivery failed: "); |
| 7257 | if (addr_failed->basic_errno > 0) |
| 7258 | { |
| 7259 | fprintf(stderr, "%s", strerror(addr_failed->basic_errno)); |
| 7260 | if (s) fprintf(stderr, ": "); |
| 7261 | } |
| 7262 | if ((host = addr_failed->host_used)) |
| 7263 | fprintf(stderr, "H=%s [%s]: ", host->name, host->address); |
| 7264 | if (s) |
| 7265 | fprintf(stderr, "%s", CS s); |
| 7266 | else if (addr_failed->basic_errno <= 0) |
| 7267 | fprintf(stderr, "unknown error"); |
| 7268 | fprintf(stderr, "\n"); |
| 7269 | |
| 7270 | final_yield = DELIVER_MUA_FAILED; |
| 7271 | addr_failed = NULL; |
| 7272 | } |
| 7273 | } |
| 7274 | |
| 7275 | /* In a normal configuration, we now update the retry database. This is done in |
| 7276 | one fell swoop at the end in order not to keep opening and closing (and |
| 7277 | locking) the database. The code for handling retries is hived off into a |
| 7278 | separate module for convenience. We pass it the addresses of the various |
| 7279 | chains, because deferred addresses can get moved onto the failed chain if the |
| 7280 | retry cutoff time has expired for all alternative destinations. Bypass the |
| 7281 | updating of the database if the -N flag is set, which is a debugging thing that |
| 7282 | prevents actual delivery. */ |
| 7283 | |
| 7284 | else if (!f.dont_deliver) |
| 7285 | retry_update(&addr_defer, &addr_failed, &addr_succeed); |
| 7286 | |
| 7287 | /* Send DSN for successful messages if requested */ |
| 7288 | addr_senddsn = NULL; |
| 7289 | |
| 7290 | for (address_item * a = addr_succeed; a; a = a->next) |
| 7291 | { |
| 7292 | /* af_ignore_error not honored here. it's not an error */ |
| 7293 | DEBUG(D_deliver) debug_printf("DSN: processing router : %s\n" |
| 7294 | "DSN: processing successful delivery address: %s\n" |
| 7295 | "DSN: Sender_address: %s\n" |
| 7296 | "DSN: orcpt: %s flags: 0x%x\n" |
| 7297 | "DSN: envid: %s ret: %d\n" |
| 7298 | "DSN: Final recipient: %s\n" |
| 7299 | "DSN: Remote SMTP server supports DSN: %d\n", |
| 7300 | a->router ? a->router->name : US"(unknown)", |
| 7301 | a->address, |
| 7302 | sender_address, |
| 7303 | a->dsn_orcpt ? a->dsn_orcpt : US"NULL", |
| 7304 | a->dsn_flags, |
| 7305 | dsn_envid ? dsn_envid : US"NULL", dsn_ret, |
| 7306 | a->address, |
| 7307 | a->dsn_aware |
| 7308 | ); |
| 7309 | |
| 7310 | /* send report if next hop not DSN aware or a router flagged "last DSN hop" |
| 7311 | and a report was requested */ |
| 7312 | |
| 7313 | if ( (a->dsn_aware != dsn_support_yes || a->dsn_flags & rf_dsnlasthop) |
| 7314 | && a->dsn_flags & rf_notify_success |
| 7315 | ) |
| 7316 | { |
| 7317 | /* copy and relink address_item and send report with all of them at once later */ |
| 7318 | address_item * addr_next = addr_senddsn; |
| 7319 | addr_senddsn = store_get(sizeof(address_item), FALSE); |
| 7320 | *addr_senddsn = *a; |
| 7321 | addr_senddsn->next = addr_next; |
| 7322 | } |
| 7323 | else |
| 7324 | DEBUG(D_deliver) debug_printf("DSN: not sending DSN success message\n"); |
| 7325 | } |
| 7326 | |
| 7327 | if (addr_senddsn) |
| 7328 | { |
| 7329 | pid_t pid; |
| 7330 | int fd; |
| 7331 | |
| 7332 | /* create exim process to send message */ |
| 7333 | pid = child_open_exim(&fd); |
| 7334 | |
| 7335 | DEBUG(D_deliver) debug_printf("DSN: child_open_exim returns: %d\n", pid); |
| 7336 | |
| 7337 | if (pid < 0) /* Creation of child failed */ |
| 7338 | { |
| 7339 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to " |
| 7340 | "create child process to send success-dsn message: %s", getpid(), |
| 7341 | getppid(), strerror(errno)); |
| 7342 | |
| 7343 | DEBUG(D_deliver) debug_printf("DSN: child_open_exim failed\n"); |
| 7344 | } |
| 7345 | else /* Creation of child succeeded */ |
| 7346 | { |
| 7347 | FILE * f = fdopen(fd, "wb"); |
| 7348 | /* header only as required by RFC. only failure DSN needs to honor RET=FULL */ |
| 7349 | uschar * bound; |
| 7350 | transport_ctx tctx = {{0}}; |
| 7351 | |
| 7352 | DEBUG(D_deliver) |
| 7353 | debug_printf("sending success-dsn to: %s\n", sender_address); |
| 7354 | |
| 7355 | /* build unique id for MIME boundary */ |
| 7356 | bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand()); |
| 7357 | DEBUG(D_deliver) debug_printf("DSN: MIME boundary: %s\n", bound); |
| 7358 | |
| 7359 | if (errors_reply_to) |
| 7360 | fprintf(f, "Reply-To: %s\n", errors_reply_to); |
| 7361 | |
| 7362 | moan_write_from(f); |
| 7363 | fprintf(f, "Auto-Submitted: auto-generated\n" |
| 7364 | "To: %s\n" |
| 7365 | "Subject: Delivery Status Notification\n", |
| 7366 | sender_address); |
| 7367 | moan_write_references(f, NULL); |
| 7368 | fprintf(f, "Content-Type: multipart/report;" |
| 7369 | " report-type=delivery-status; boundary=%s\n" |
| 7370 | "MIME-Version: 1.0\n\n" |
| 7371 | |
| 7372 | "--%s\n" |
| 7373 | "Content-type: text/plain; charset=us-ascii\n\n" |
| 7374 | |
| 7375 | "This message was created automatically by mail delivery software.\n" |
| 7376 | " ----- The following addresses had successful delivery notifications -----\n", |
| 7377 | bound, bound); |
| 7378 | |
| 7379 | for (address_item * a = addr_senddsn; a; a = a->next) |
| 7380 | fprintf(f, "<%s> (relayed %s)\n\n", |
| 7381 | a->address, |
| 7382 | a->dsn_flags & rf_dsnlasthop ? "via non DSN router" |
| 7383 | : a->dsn_aware == dsn_support_no ? "to non-DSN-aware mailer" |
| 7384 | : "via non \"Remote SMTP\" router" |
| 7385 | ); |
| 7386 | |
| 7387 | fprintf(f, "--%s\n" |
| 7388 | "Content-type: message/delivery-status\n\n" |
| 7389 | "Reporting-MTA: dns; %s\n", |
| 7390 | bound, smtp_active_hostname); |
| 7391 | |
| 7392 | if (dsn_envid) |
| 7393 | { /* must be decoded from xtext: see RFC 3461:6.3a */ |
| 7394 | uschar *xdec_envid; |
| 7395 | if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0) |
| 7396 | fprintf(f, "Original-Envelope-ID: %s\n", dsn_envid); |
| 7397 | else |
| 7398 | fprintf(f, "X-Original-Envelope-ID: error decoding xtext formatted ENVID\n"); |
| 7399 | } |
| 7400 | fputc('\n', f); |
| 7401 | |
| 7402 | for (address_item * a = addr_senddsn; a; a = a->next) |
| 7403 | { |
| 7404 | host_item * hu; |
| 7405 | |
| 7406 | print_dsn_addr_action(f, a, US"delivered", US"2.0.0"); |
| 7407 | |
| 7408 | if ((hu = a->host_used) && hu->name) |
| 7409 | fprintf(f, "Remote-MTA: dns; %s\nDiagnostic-Code: smtp; 250 Ok\n\n", |
| 7410 | hu->name); |
| 7411 | else |
| 7412 | fprintf(f, "Diagnostic-Code: X-Exim; relayed via non %s router\n\n", |
| 7413 | a->dsn_flags & rf_dsnlasthop ? "DSN" : "SMTP"); |
| 7414 | } |
| 7415 | |
| 7416 | fprintf(f, "--%s\nContent-type: text/rfc822-headers\n\n", bound); |
| 7417 | |
| 7418 | fflush(f); |
| 7419 | transport_filter_argv = NULL; /* Just in case */ |
| 7420 | return_path = sender_address; /* In case not previously set */ |
| 7421 | |
| 7422 | /* Write the original email out */ |
| 7423 | |
| 7424 | tctx.u.fd = fd; |
| 7425 | tctx.options = topt_add_return_path | topt_no_body; |
| 7426 | /*XXX hmm, FALSE(fail) retval ignored. |
| 7427 | Could error for any number of reasons, and they are not handled. */ |
| 7428 | transport_write_message(&tctx, 0); |
| 7429 | fflush(f); |
| 7430 | |
| 7431 | fprintf(f,"\n--%s--\n", bound); |
| 7432 | |
| 7433 | fflush(f); |
| 7434 | fclose(f); |
| 7435 | rc = child_close(pid, 0); /* Waits for child to close, no timeout */ |
| 7436 | } |
| 7437 | } |
| 7438 | |
| 7439 | /* If any addresses failed, we must send a message to somebody, unless |
| 7440 | af_ignore_error is set, in which case no action is taken. It is possible for |
| 7441 | several messages to get sent if there are addresses with different |
| 7442 | requirements. */ |
| 7443 | |
| 7444 | while (addr_failed) |
| 7445 | { |
| 7446 | pid_t pid; |
| 7447 | int fd; |
| 7448 | uschar *logtod = tod_stamp(tod_log); |
| 7449 | address_item *addr; |
| 7450 | address_item *handled_addr = NULL; |
| 7451 | address_item **paddr; |
| 7452 | address_item *msgchain = NULL; |
| 7453 | address_item **pmsgchain = &msgchain; |
| 7454 | |
| 7455 | /* There are weird cases when logging is disabled in the transport. However, |
| 7456 | there may not be a transport (address failed by a router). */ |
| 7457 | |
| 7458 | f.disable_logging = FALSE; |
| 7459 | if (addr_failed->transport) |
| 7460 | f.disable_logging = addr_failed->transport->disable_logging; |
| 7461 | |
| 7462 | DEBUG(D_deliver) |
| 7463 | debug_printf("processing failed address %s\n", addr_failed->address); |
| 7464 | |
| 7465 | /* There are only two ways an address in a bounce message can get here: |
| 7466 | |
| 7467 | (1) When delivery was initially deferred, but has now timed out (in the call |
| 7468 | to retry_update() above). We can detect this by testing for |
| 7469 | af_retry_timedout. If the address does not have its own errors address, |
| 7470 | we arrange to ignore the error. |
| 7471 | |
| 7472 | (2) If delivery failures for bounce messages are being ignored. We can detect |
| 7473 | this by testing for af_ignore_error. This will also be set if a bounce |
| 7474 | message has been autothawed and the ignore_bounce_errors_after time has |
| 7475 | passed. It might also be set if a router was explicitly configured to |
| 7476 | ignore errors (errors_to = ""). |
| 7477 | |
| 7478 | If neither of these cases obtains, something has gone wrong. Log the |
| 7479 | incident, but then ignore the error. */ |
| 7480 | |
| 7481 | if (sender_address[0] == 0 && !addr_failed->prop.errors_address) |
| 7482 | { |
| 7483 | if ( !testflag(addr_failed, af_retry_timedout) |
| 7484 | && !addr_failed->prop.ignore_error) |
| 7485 | log_write(0, LOG_MAIN|LOG_PANIC, "internal error: bounce message " |
| 7486 | "failure is neither frozen nor ignored (it's been ignored)"); |
| 7487 | |
| 7488 | addr_failed->prop.ignore_error = TRUE; |
| 7489 | } |
| 7490 | |
| 7491 | /* If the first address on the list has af_ignore_error set, just remove |
| 7492 | it from the list, throw away any saved message file, log it, and |
| 7493 | mark the recipient done. */ |
| 7494 | |
| 7495 | if ( addr_failed->prop.ignore_error |
| 7496 | || addr_failed->dsn_flags & rf_dsnflags |
| 7497 | && !(addr_failed->dsn_flags & rf_notify_failure) |
| 7498 | ) |
| 7499 | { |
| 7500 | addr = addr_failed; |
| 7501 | addr_failed = addr->next; |
| 7502 | if (addr->return_filename) Uunlink(addr->return_filename); |
| 7503 | |
| 7504 | #ifndef DISABLE_EVENT |
| 7505 | msg_event_raise(US"msg:fail:delivery", addr); |
| 7506 | #endif |
| 7507 | log_write(0, LOG_MAIN, "%s%s%s%s: error ignored%s", |
| 7508 | addr->address, |
| 7509 | !addr->parent ? US"" : US" <", |
| 7510 | !addr->parent ? US"" : addr->parent->address, |
| 7511 | !addr->parent ? US"" : US">", |
| 7512 | addr->prop.ignore_error |
| 7513 | ? US"" : US": RFC 3461 DSN, failure notify not requested"); |
| 7514 | |
| 7515 | address_done(addr, logtod); |
| 7516 | child_done(addr, logtod); |
| 7517 | /* Panic-dies on error */ |
| 7518 | (void)spool_write_header(message_id, SW_DELIVERING, NULL); |
| 7519 | } |
| 7520 | |
| 7521 | /* Otherwise, handle the sending of a message. Find the error address for |
| 7522 | the first address, then send a message that includes all failed addresses |
| 7523 | that have the same error address. Note the bounce_recipient is a global so |
| 7524 | that it can be accessed by $bounce_recipient while creating a customized |
| 7525 | error message. */ |
| 7526 | |
| 7527 | else |
| 7528 | { |
| 7529 | if (!(bounce_recipient = addr_failed->prop.errors_address)) |
| 7530 | bounce_recipient = sender_address; |
| 7531 | |
| 7532 | /* Make a subprocess to send a message */ |
| 7533 | |
| 7534 | if ((pid = child_open_exim(&fd)) < 0) |
| 7535 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to " |
| 7536 | "create child process to send failure message: %s", getpid(), |
| 7537 | getppid(), strerror(errno)); |
| 7538 | |
| 7539 | /* Creation of child succeeded */ |
| 7540 | |
| 7541 | else |
| 7542 | { |
| 7543 | int ch, rc; |
| 7544 | int filecount = 0; |
| 7545 | int rcount = 0; |
| 7546 | uschar *bcc, *emf_text; |
| 7547 | FILE * fp = fdopen(fd, "wb"); |
| 7548 | FILE * emf = NULL; |
| 7549 | BOOL to_sender = strcmpic(sender_address, bounce_recipient) == 0; |
| 7550 | int max = (bounce_return_size_limit/DELIVER_IN_BUFFER_SIZE + 1) * |
| 7551 | DELIVER_IN_BUFFER_SIZE; |
| 7552 | uschar * bound; |
| 7553 | uschar *dsnlimitmsg; |
| 7554 | uschar *dsnnotifyhdr; |
| 7555 | int topt; |
| 7556 | |
| 7557 | DEBUG(D_deliver) |
| 7558 | debug_printf("sending error message to: %s\n", bounce_recipient); |
| 7559 | |
| 7560 | /* Scan the addresses for all that have the same errors address, removing |
| 7561 | them from the addr_failed chain, and putting them on msgchain. */ |
| 7562 | |
| 7563 | paddr = &addr_failed; |
| 7564 | for (addr = addr_failed; addr; addr = *paddr) |
| 7565 | if (Ustrcmp(bounce_recipient, addr->prop.errors_address |
| 7566 | ? addr->prop.errors_address : sender_address) == 0) |
| 7567 | { /* The same - dechain */ |
| 7568 | *paddr = addr->next; |
| 7569 | *pmsgchain = addr; |
| 7570 | addr->next = NULL; |
| 7571 | pmsgchain = &(addr->next); |
| 7572 | } |
| 7573 | else |
| 7574 | paddr = &addr->next; /* Not the same; skip */ |
| 7575 | |
| 7576 | /* Include X-Failed-Recipients: for automatic interpretation, but do |
| 7577 | not let any one header line get too long. We do this by starting a |
| 7578 | new header every 50 recipients. Omit any addresses for which the |
| 7579 | "hide_child" flag is set. */ |
| 7580 | |
| 7581 | for (addr = msgchain; addr; addr = addr->next) |
| 7582 | { |
| 7583 | if (testflag(addr, af_hide_child)) continue; |
| 7584 | if (rcount >= 50) |
| 7585 | { |
| 7586 | fprintf(fp, "\n"); |
| 7587 | rcount = 0; |
| 7588 | } |
| 7589 | fprintf(fp, "%s%s", |
| 7590 | rcount++ == 0 |
| 7591 | ? "X-Failed-Recipients: " |
| 7592 | : ",\n ", |
| 7593 | testflag(addr, af_pfr) && addr->parent |
| 7594 | ? string_printing(addr->parent->address) |
| 7595 | : string_printing(addr->address)); |
| 7596 | } |
| 7597 | if (rcount > 0) fprintf(fp, "\n"); |
| 7598 | |
| 7599 | /* Output the standard headers */ |
| 7600 | |
| 7601 | if (errors_reply_to) |
| 7602 | fprintf(fp, "Reply-To: %s\n", errors_reply_to); |
| 7603 | fprintf(fp, "Auto-Submitted: auto-replied\n"); |
| 7604 | moan_write_from(fp); |
| 7605 | fprintf(fp, "To: %s\n", bounce_recipient); |
| 7606 | moan_write_references(fp, NULL); |
| 7607 | |
| 7608 | /* generate boundary string and output MIME-Headers */ |
| 7609 | bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand()); |
| 7610 | |
| 7611 | fprintf(fp, "Content-Type: multipart/report;" |
| 7612 | " report-type=delivery-status; boundary=%s\n" |
| 7613 | "MIME-Version: 1.0\n", |
| 7614 | bound); |
| 7615 | |
| 7616 | /* Open a template file if one is provided. Log failure to open, but |
| 7617 | carry on - default texts will be used. */ |
| 7618 | |
| 7619 | if (bounce_message_file) |
| 7620 | if (!(emf = Ufopen(bounce_message_file, "rb"))) |
| 7621 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for error " |
| 7622 | "message texts: %s", bounce_message_file, strerror(errno)); |
| 7623 | |
| 7624 | /* Quietly copy to configured additional addresses if required. */ |
| 7625 | |
| 7626 | if ((bcc = moan_check_errorcopy(bounce_recipient))) |
| 7627 | fprintf(fp, "Bcc: %s\n", bcc); |
| 7628 | |
| 7629 | /* The texts for the message can be read from a template file; if there |
| 7630 | isn't one, or if it is too short, built-in texts are used. The first |
| 7631 | emf text is a Subject: and any other headers. */ |
| 7632 | |
| 7633 | if ((emf_text = next_emf(emf, US"header"))) |
| 7634 | fprintf(fp, "%s\n", emf_text); |
| 7635 | else |
| 7636 | fprintf(fp, "Subject: Mail delivery failed%s\n\n", |
| 7637 | to_sender? ": returning message to sender" : ""); |
| 7638 | |
| 7639 | /* output human readable part as text/plain section */ |
| 7640 | fprintf(fp, "--%s\n" |
| 7641 | "Content-type: text/plain; charset=us-ascii\n\n", |
| 7642 | bound); |
| 7643 | |
| 7644 | if ((emf_text = next_emf(emf, US"intro"))) |
| 7645 | fprintf(fp, "%s", CS emf_text); |
| 7646 | else |
| 7647 | { |
| 7648 | fprintf(fp, |
| 7649 | /* This message has been reworded several times. It seems to be confusing to |
| 7650 | somebody, however it is worded. I have retreated to the original, simple |
| 7651 | wording. */ |
| 7652 | "This message was created automatically by mail delivery software.\n"); |
| 7653 | |
| 7654 | if (bounce_message_text) |
| 7655 | fprintf(fp, "%s", CS bounce_message_text); |
| 7656 | if (to_sender) |
| 7657 | fprintf(fp, |
| 7658 | "\nA message that you sent could not be delivered to one or more of its\n" |
| 7659 | "recipients. This is a permanent error. The following address(es) failed:\n"); |
| 7660 | else |
| 7661 | fprintf(fp, |
| 7662 | "\nA message sent by\n\n <%s>\n\n" |
| 7663 | "could not be delivered to one or more of its recipients. The following\n" |
| 7664 | "address(es) failed:\n", sender_address); |
| 7665 | } |
| 7666 | fputc('\n', fp); |
| 7667 | |
| 7668 | /* Process the addresses, leaving them on the msgchain if they have a |
| 7669 | file name for a return message. (There has already been a check in |
| 7670 | post_process_one() for the existence of data in the message file.) A TRUE |
| 7671 | return from print_address_information() means that the address is not |
| 7672 | hidden. */ |
| 7673 | |
| 7674 | paddr = &msgchain; |
| 7675 | for (addr = msgchain; addr; addr = *paddr) |
| 7676 | { |
| 7677 | if (print_address_information(addr, fp, US" ", US"\n ", US"")) |
| 7678 | print_address_error(addr, fp, US""); |
| 7679 | |
| 7680 | /* End the final line for the address */ |
| 7681 | |
| 7682 | fputc('\n', fp); |
| 7683 | |
| 7684 | /* Leave on msgchain if there's a return file. */ |
| 7685 | |
| 7686 | if (addr->return_file >= 0) |
| 7687 | { |
| 7688 | paddr = &(addr->next); |
| 7689 | filecount++; |
| 7690 | } |
| 7691 | |
| 7692 | /* Else save so that we can tick off the recipient when the |
| 7693 | message is sent. */ |
| 7694 | |
| 7695 | else |
| 7696 | { |
| 7697 | *paddr = addr->next; |
| 7698 | addr->next = handled_addr; |
| 7699 | handled_addr = addr; |
| 7700 | } |
| 7701 | } |
| 7702 | |
| 7703 | fputc('\n', fp); |
| 7704 | |
| 7705 | /* Get the next text, whether we need it or not, so as to be |
| 7706 | positioned for the one after. */ |
| 7707 | |
| 7708 | emf_text = next_emf(emf, US"generated text"); |
| 7709 | |
| 7710 | /* If there were any file messages passed by the local transports, |
| 7711 | include them in the message. Then put the address on the handled chain. |
| 7712 | In the case of a batch of addresses that were all sent to the same |
| 7713 | transport, the return_file field in all of them will contain the same |
| 7714 | fd, and the return_filename field in the *last* one will be set (to the |
| 7715 | name of the file). */ |
| 7716 | |
| 7717 | if (msgchain) |
| 7718 | { |
| 7719 | address_item *nextaddr; |
| 7720 | |
| 7721 | if (emf_text) |
| 7722 | fprintf(fp, "%s", CS emf_text); |
| 7723 | else |
| 7724 | fprintf(fp, |
| 7725 | "The following text was generated during the delivery " |
| 7726 | "attempt%s:\n", (filecount > 1)? "s" : ""); |
| 7727 | |
| 7728 | for (addr = msgchain; addr; addr = nextaddr) |
| 7729 | { |
| 7730 | FILE *fm; |
| 7731 | address_item *topaddr = addr; |
| 7732 | |
| 7733 | /* List all the addresses that relate to this file */ |
| 7734 | |
| 7735 | fputc('\n', fp); |
| 7736 | while(addr) /* Insurance */ |
| 7737 | { |
| 7738 | print_address_information(addr, fp, US"------ ", US"\n ", |
| 7739 | US" ------\n"); |
| 7740 | if (addr->return_filename) break; |
| 7741 | addr = addr->next; |
| 7742 | } |
| 7743 | fputc('\n', fp); |
| 7744 | |
| 7745 | /* Now copy the file */ |
| 7746 | |
| 7747 | if (!(fm = Ufopen(addr->return_filename, "rb"))) |
| 7748 | fprintf(fp, " +++ Exim error... failed to open text file: %s\n", |
| 7749 | strerror(errno)); |
| 7750 | else |
| 7751 | { |
| 7752 | while ((ch = fgetc(fm)) != EOF) fputc(ch, fp); |
| 7753 | (void)fclose(fm); |
| 7754 | } |
| 7755 | Uunlink(addr->return_filename); |
| 7756 | |
| 7757 | /* Can now add to handled chain, first fishing off the next |
| 7758 | address on the msgchain. */ |
| 7759 | |
| 7760 | nextaddr = addr->next; |
| 7761 | addr->next = handled_addr; |
| 7762 | handled_addr = topaddr; |
| 7763 | } |
| 7764 | fputc('\n', fp); |
| 7765 | } |
| 7766 | |
| 7767 | /* output machine readable part */ |
| 7768 | #ifdef SUPPORT_I18N |
| 7769 | if (message_smtputf8) |
| 7770 | fprintf(fp, "--%s\n" |
| 7771 | "Content-type: message/global-delivery-status\n\n" |
| 7772 | "Reporting-MTA: dns; %s\n", |
| 7773 | bound, smtp_active_hostname); |
| 7774 | else |
| 7775 | #endif |
| 7776 | fprintf(fp, "--%s\n" |
| 7777 | "Content-type: message/delivery-status\n\n" |
| 7778 | "Reporting-MTA: dns; %s\n", |
| 7779 | bound, smtp_active_hostname); |
| 7780 | |
| 7781 | if (dsn_envid) |
| 7782 | { |
| 7783 | /* must be decoded from xtext: see RFC 3461:6.3a */ |
| 7784 | uschar *xdec_envid; |
| 7785 | if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0) |
| 7786 | fprintf(fp, "Original-Envelope-ID: %s\n", dsn_envid); |
| 7787 | else |
| 7788 | fprintf(fp, "X-Original-Envelope-ID: error decoding xtext formatted ENVID\n"); |
| 7789 | } |
| 7790 | fputc('\n', fp); |
| 7791 | |
| 7792 | for (addr = handled_addr; addr; addr = addr->next) |
| 7793 | { |
| 7794 | host_item * hu; |
| 7795 | |
| 7796 | print_dsn_addr_action(fp, addr, US"failed", US"5.0.0"); |
| 7797 | |
| 7798 | if ((hu = addr->host_used) && hu->name) |
| 7799 | { |
| 7800 | fprintf(fp, "Remote-MTA: dns; %s\n", hu->name); |
| 7801 | #ifdef EXPERIMENTAL_DSN_INFO |
| 7802 | { |
| 7803 | const uschar * s; |
| 7804 | if (hu->address) |
| 7805 | { |
| 7806 | uschar * p = hu->port == 25 |
| 7807 | ? US"" : string_sprintf(":%d", hu->port); |
| 7808 | fprintf(fp, "Remote-MTA: X-ip; [%s]%s\n", hu->address, p); |
| 7809 | } |
| 7810 | if ((s = addr->smtp_greeting) && *s) |
| 7811 | fprintf(fp, "X-Remote-MTA-smtp-greeting: X-str; %s\n", s); |
| 7812 | if ((s = addr->helo_response) && *s) |
| 7813 | fprintf(fp, "X-Remote-MTA-helo-response: X-str; %s\n", s); |
| 7814 | if ((s = addr->message) && *s) |
| 7815 | fprintf(fp, "X-Exim-Diagnostic: X-str; %s\n", s); |
| 7816 | } |
| 7817 | #endif |
| 7818 | print_dsn_diagnostic_code(addr, fp); |
| 7819 | } |
| 7820 | fputc('\n', fp); |
| 7821 | } |
| 7822 | |
| 7823 | /* Now copy the message, trying to give an intelligible comment if |
| 7824 | it is too long for it all to be copied. The limit isn't strictly |
| 7825 | applied because of the buffering. There is, however, an option |
| 7826 | to suppress copying altogether. */ |
| 7827 | |
| 7828 | emf_text = next_emf(emf, US"copy"); |
| 7829 | |
| 7830 | /* add message body |
| 7831 | we ignore the intro text from template and add |
| 7832 | the text for bounce_return_size_limit at the end. |
| 7833 | |
| 7834 | bounce_return_message is ignored |
| 7835 | in case RET= is defined we honor these values |
| 7836 | otherwise bounce_return_body is honored. |
| 7837 | |
| 7838 | bounce_return_size_limit is always honored. |
| 7839 | */ |
| 7840 | |
| 7841 | fprintf(fp, "--%s\n", bound); |
| 7842 | |
| 7843 | dsnlimitmsg = US"X-Exim-DSN-Information: Due to administrative limits only headers are returned"; |
| 7844 | dsnnotifyhdr = NULL; |
| 7845 | topt = topt_add_return_path; |
| 7846 | |
| 7847 | /* RET=HDRS? top priority */ |
| 7848 | if (dsn_ret == dsn_ret_hdrs) |
| 7849 | topt |= topt_no_body; |
| 7850 | else |
| 7851 | { |
| 7852 | struct stat statbuf; |
| 7853 | |
| 7854 | /* no full body return at all? */ |
| 7855 | if (!bounce_return_body) |
| 7856 | { |
| 7857 | topt |= topt_no_body; |
| 7858 | /* add header if we overrule RET=FULL */ |
| 7859 | if (dsn_ret == dsn_ret_full) |
| 7860 | dsnnotifyhdr = dsnlimitmsg; |
| 7861 | } |
| 7862 | /* line length limited... return headers only if oversize */ |
| 7863 | /* size limited ... return headers only if limit reached */ |
| 7864 | else if ( max_received_linelength > bounce_return_linesize_limit |
| 7865 | || ( bounce_return_size_limit > 0 |
| 7866 | && fstat(deliver_datafile, &statbuf) == 0 |
| 7867 | && statbuf.st_size > max |
| 7868 | ) ) |
| 7869 | { |
| 7870 | topt |= topt_no_body; |
| 7871 | dsnnotifyhdr = dsnlimitmsg; |
| 7872 | } |
| 7873 | } |
| 7874 | |
| 7875 | #ifdef SUPPORT_I18N |
| 7876 | if (message_smtputf8) |
| 7877 | fputs(topt & topt_no_body ? "Content-type: message/global-headers\n\n" |
| 7878 | : "Content-type: message/global\n\n", |
| 7879 | fp); |
| 7880 | else |
| 7881 | #endif |
| 7882 | fputs(topt & topt_no_body ? "Content-type: text/rfc822-headers\n\n" |
| 7883 | : "Content-type: message/rfc822\n\n", |
| 7884 | fp); |
| 7885 | |
| 7886 | fflush(fp); |
| 7887 | transport_filter_argv = NULL; /* Just in case */ |
| 7888 | return_path = sender_address; /* In case not previously set */ |
| 7889 | { /* Dummy transport for headers add */ |
| 7890 | transport_ctx tctx = {{0}}; |
| 7891 | transport_instance tb = {0}; |
| 7892 | |
| 7893 | tctx.u.fd = fileno(fp); |
| 7894 | tctx.tblock = &tb; |
| 7895 | tctx.options = topt; |
| 7896 | tb.add_headers = dsnnotifyhdr; |
| 7897 | |
| 7898 | /*XXX no checking for failure! buggy! */ |
| 7899 | transport_write_message(&tctx, 0); |
| 7900 | } |
| 7901 | fflush(fp); |
| 7902 | |
| 7903 | /* we never add the final text. close the file */ |
| 7904 | if (emf) |
| 7905 | (void)fclose(emf); |
| 7906 | |
| 7907 | fprintf(fp, "\n--%s--\n", bound); |
| 7908 | |
| 7909 | /* Close the file, which should send an EOF to the child process |
| 7910 | that is receiving the message. Wait for it to finish. */ |
| 7911 | |
| 7912 | (void)fclose(fp); |
| 7913 | rc = child_close(pid, 0); /* Waits for child to close, no timeout */ |
| 7914 | |
| 7915 | /* In the test harness, let the child do it's thing first. */ |
| 7916 | |
| 7917 | testharness_pause_ms(500); |
| 7918 | |
| 7919 | /* If the process failed, there was some disaster in setting up the |
| 7920 | error message. Unless the message is very old, ensure that addr_defer |
| 7921 | is non-null, which will have the effect of leaving the message on the |
| 7922 | spool. The failed addresses will get tried again next time. However, we |
| 7923 | don't really want this to happen too often, so freeze the message unless |
| 7924 | there are some genuine deferred addresses to try. To do this we have |
| 7925 | to call spool_write_header() here, because with no genuine deferred |
| 7926 | addresses the normal code below doesn't get run. */ |
| 7927 | |
| 7928 | if (rc != 0) |
| 7929 | { |
| 7930 | uschar *s = US""; |
| 7931 | if (now - received_time.tv_sec < retry_maximum_timeout && !addr_defer) |
| 7932 | { |
| 7933 | addr_defer = (address_item *)(+1); |
| 7934 | f.deliver_freeze = TRUE; |
| 7935 | deliver_frozen_at = time(NULL); |
| 7936 | /* Panic-dies on error */ |
| 7937 | (void)spool_write_header(message_id, SW_DELIVERING, NULL); |
| 7938 | s = US" (frozen)"; |
| 7939 | } |
| 7940 | deliver_msglog("Process failed (%d) when writing error message " |
| 7941 | "to %s%s", rc, bounce_recipient, s); |
| 7942 | log_write(0, LOG_MAIN, "Process failed (%d) when writing error message " |
| 7943 | "to %s%s", rc, bounce_recipient, s); |
| 7944 | } |
| 7945 | |
| 7946 | /* The message succeeded. Ensure that the recipients that failed are |
| 7947 | now marked finished with on the spool and their parents updated. */ |
| 7948 | |
| 7949 | else |
| 7950 | { |
| 7951 | for (addr = handled_addr; addr; addr = addr->next) |
| 7952 | { |
| 7953 | address_done(addr, logtod); |
| 7954 | child_done(addr, logtod); |
| 7955 | } |
| 7956 | /* Panic-dies on error */ |
| 7957 | (void)spool_write_header(message_id, SW_DELIVERING, NULL); |
| 7958 | } |
| 7959 | } |
| 7960 | } |
| 7961 | } |
| 7962 | |
| 7963 | f.disable_logging = FALSE; /* In case left set */ |
| 7964 | |
| 7965 | /* Come here from the mua_wrapper case if routing goes wrong */ |
| 7966 | |
| 7967 | DELIVERY_TIDYUP: |
| 7968 | |
| 7969 | /* If there are now no deferred addresses, we are done. Preserve the |
| 7970 | message log if so configured, and we are using them. Otherwise, sling it. |
| 7971 | Then delete the message itself. */ |
| 7972 | |
| 7973 | if (!addr_defer) |
| 7974 | { |
| 7975 | uschar * fname; |
| 7976 | |
| 7977 | if (message_logs) |
| 7978 | { |
| 7979 | fname = spool_fname(US"msglog", message_subdir, id, US""); |
| 7980 | if (preserve_message_logs) |
| 7981 | { |
| 7982 | int rc; |
| 7983 | uschar * moname = spool_fname(US"msglog.OLD", US"", id, US""); |
| 7984 | |
| 7985 | if ((rc = Urename(fname, moname)) < 0) |
| 7986 | { |
| 7987 | (void)directory_make(spool_directory, |
| 7988 | spool_sname(US"msglog.OLD", US""), |
| 7989 | MSGLOG_DIRECTORY_MODE, TRUE); |
| 7990 | rc = Urename(fname, moname); |
| 7991 | } |
| 7992 | if (rc < 0) |
| 7993 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to move %s to the " |
| 7994 | "msglog.OLD directory", fname); |
| 7995 | } |
| 7996 | else |
| 7997 | if (Uunlink(fname) < 0) |
| 7998 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s", |
| 7999 | fname, strerror(errno)); |
| 8000 | } |
| 8001 | |
| 8002 | /* Remove the two message files. */ |
| 8003 | |
| 8004 | fname = spool_fname(US"input", message_subdir, id, US"-D"); |
| 8005 | if (Uunlink(fname) < 0) |
| 8006 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s", |
| 8007 | fname, strerror(errno)); |
| 8008 | fname = spool_fname(US"input", message_subdir, id, US"-H"); |
| 8009 | if (Uunlink(fname) < 0) |
| 8010 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s", |
| 8011 | fname, strerror(errno)); |
| 8012 | |
| 8013 | /* Log the end of this message, with queue time if requested. */ |
| 8014 | |
| 8015 | if (LOGGING(queue_time_overall)) |
| 8016 | log_write(0, LOG_MAIN, "Completed QT=%s", string_timesince(&received_time)); |
| 8017 | else |
| 8018 | log_write(0, LOG_MAIN, "Completed"); |
| 8019 | |
| 8020 | /* Unset deliver_freeze so that we won't try to move the spool files further down */ |
| 8021 | f.deliver_freeze = FALSE; |
| 8022 | |
| 8023 | #ifndef DISABLE_EVENT |
| 8024 | (void) event_raise(event_action, US"msg:complete", NULL); |
| 8025 | #endif |
| 8026 | } |
| 8027 | |
| 8028 | /* If there are deferred addresses, we are keeping this message because it is |
| 8029 | not yet completed. Lose any temporary files that were catching output from |
| 8030 | pipes for any of the deferred addresses, handle one-time aliases, and see if |
| 8031 | the message has been on the queue for so long that it is time to send a warning |
| 8032 | message to the sender, unless it is a mailer-daemon. If all deferred addresses |
| 8033 | have the same domain, we can set deliver_domain for the expansion of |
| 8034 | delay_warning_ condition - if any of them are pipes, files, or autoreplies, use |
| 8035 | the parent's domain. |
| 8036 | |
| 8037 | If all the deferred addresses have an error number that indicates "retry time |
| 8038 | not reached", skip sending the warning message, because it won't contain the |
| 8039 | reason for the delay. It will get sent at the next real delivery attempt. |
| 8040 | Exception: for retries caused by a remote peer we use the error message |
| 8041 | store in the retry DB as the reason. |
| 8042 | However, if at least one address has tried, we'd better include all of them in |
| 8043 | the message. |
| 8044 | |
| 8045 | If we can't make a process to send the message, don't worry. |
| 8046 | |
| 8047 | For mailing list expansions we want to send the warning message to the |
| 8048 | mailing list manager. We can't do a perfect job here, as some addresses may |
| 8049 | have different errors addresses, but if we take the errors address from |
| 8050 | each deferred address it will probably be right in most cases. |
| 8051 | |
| 8052 | If addr_defer == +1, it means there was a problem sending an error message |
| 8053 | for failed addresses, and there were no "real" deferred addresses. The value |
| 8054 | was set just to keep the message on the spool, so there is nothing to do here. |
| 8055 | */ |
| 8056 | |
| 8057 | else if (addr_defer != (address_item *)(+1)) |
| 8058 | { |
| 8059 | uschar *recipients = US""; |
| 8060 | BOOL want_warning_msg = FALSE; |
| 8061 | |
| 8062 | deliver_domain = testflag(addr_defer, af_pfr) |
| 8063 | ? addr_defer->parent->domain : addr_defer->domain; |
| 8064 | |
| 8065 | for (address_item * addr = addr_defer; addr; addr = addr->next) |
| 8066 | { |
| 8067 | address_item *otaddr; |
| 8068 | |
| 8069 | if (addr->basic_errno > ERRNO_WARN_BASE) want_warning_msg = TRUE; |
| 8070 | |
| 8071 | if (deliver_domain) |
| 8072 | { |
| 8073 | const uschar *d = testflag(addr, af_pfr) |
| 8074 | ? addr->parent->domain : addr->domain; |
| 8075 | |
| 8076 | /* The domain may be unset for an address that has never been routed |
| 8077 | because the system filter froze the message. */ |
| 8078 | |
| 8079 | if (!d || Ustrcmp(d, deliver_domain) != 0) |
| 8080 | deliver_domain = NULL; |
| 8081 | } |
| 8082 | |
| 8083 | if (addr->return_filename) Uunlink(addr->return_filename); |
| 8084 | |
| 8085 | /* Handle the case of one-time aliases. If any address in the ancestry |
| 8086 | of this one is flagged, ensure it is in the recipients list, suitably |
| 8087 | flagged, and that its parent is marked delivered. */ |
| 8088 | |
| 8089 | for (otaddr = addr; otaddr; otaddr = otaddr->parent) |
| 8090 | if (otaddr->onetime_parent) break; |
| 8091 | |
| 8092 | if (otaddr) |
| 8093 | { |
| 8094 | int i; |
| 8095 | int t = recipients_count; |
| 8096 | |
| 8097 | for (i = 0; i < recipients_count; i++) |
| 8098 | { |
| 8099 | uschar *r = recipients_list[i].address; |
| 8100 | if (Ustrcmp(otaddr->onetime_parent, r) == 0) t = i; |
| 8101 | if (Ustrcmp(otaddr->address, r) == 0) break; |
| 8102 | } |
| 8103 | |
| 8104 | /* Didn't find the address already in the list, and did find the |
| 8105 | ultimate parent's address in the list, and they really are different |
| 8106 | (i.e. not from an identity-redirect). After adding the recipient, |
| 8107 | update the errors address in the recipients list. */ |
| 8108 | |
| 8109 | if ( i >= recipients_count && t < recipients_count |
| 8110 | && Ustrcmp(otaddr->address, otaddr->parent->address) != 0) |
| 8111 | { |
| 8112 | DEBUG(D_deliver) debug_printf("one_time: adding %s in place of %s\n", |
| 8113 | otaddr->address, otaddr->parent->address); |
| 8114 | receive_add_recipient(otaddr->address, t); |
| 8115 | recipients_list[recipients_count-1].errors_to = otaddr->prop.errors_address; |
| 8116 | tree_add_nonrecipient(otaddr->parent->address); |
| 8117 | update_spool = TRUE; |
| 8118 | } |
| 8119 | } |
| 8120 | |
| 8121 | /* Except for error messages, ensure that either the errors address for |
| 8122 | this deferred address or, if there is none, the sender address, is on the |
| 8123 | list of recipients for a warning message. */ |
| 8124 | |
| 8125 | if (sender_address[0]) |
| 8126 | { |
| 8127 | uschar * s = addr->prop.errors_address; |
| 8128 | if (!s) s = sender_address; |
| 8129 | if (Ustrstr(recipients, s) == NULL) |
| 8130 | recipients = string_sprintf("%s%s%s", recipients, |
| 8131 | recipients[0] ? "," : "", s); |
| 8132 | } |
| 8133 | } |
| 8134 | |
| 8135 | /* Send a warning message if the conditions are right. If the condition check |
| 8136 | fails because of a lookup defer, there is nothing we can do. The warning |
| 8137 | is not sent. Another attempt will be made at the next delivery attempt (if |
| 8138 | it also defers). */ |
| 8139 | |
| 8140 | if ( !f.queue_2stage |
| 8141 | && want_warning_msg |
| 8142 | && ( !(addr_defer->dsn_flags & rf_dsnflags) |
| 8143 | || addr_defer->dsn_flags & rf_notify_delay |
| 8144 | ) |
| 8145 | && delay_warning[1] > 0 |
| 8146 | && sender_address[0] != 0 |
| 8147 | && ( !delay_warning_condition |
| 8148 | || expand_check_condition(delay_warning_condition, |
| 8149 | US"delay_warning", US"option") |
| 8150 | ) |
| 8151 | ) |
| 8152 | { |
| 8153 | int count; |
| 8154 | int show_time; |
| 8155 | int queue_time = time(NULL) - received_time.tv_sec; |
| 8156 | |
| 8157 | queue_time = test_harness_fudged_queue_time(queue_time); |
| 8158 | |
| 8159 | /* See how many warnings we should have sent by now */ |
| 8160 | |
| 8161 | for (count = 0; count < delay_warning[1]; count++) |
| 8162 | if (queue_time < delay_warning[count+2]) break; |
| 8163 | |
| 8164 | show_time = delay_warning[count+1]; |
| 8165 | |
| 8166 | if (count >= delay_warning[1]) |
| 8167 | { |
| 8168 | int extra; |
| 8169 | int last_gap = show_time; |
| 8170 | if (count > 1) last_gap -= delay_warning[count]; |
| 8171 | extra = (queue_time - delay_warning[count+1])/last_gap; |
| 8172 | show_time += last_gap * extra; |
| 8173 | count += extra; |
| 8174 | } |
| 8175 | |
| 8176 | DEBUG(D_deliver) |
| 8177 | { |
| 8178 | debug_printf("time on queue = %s id %s addr %s\n", |
| 8179 | readconf_printtime(queue_time), message_id, addr_defer->address); |
| 8180 | debug_printf("warning counts: required %d done %d\n", count, |
| 8181 | warning_count); |
| 8182 | } |
| 8183 | |
| 8184 | /* We have computed the number of warnings there should have been by now. |
| 8185 | If there haven't been enough, send one, and up the count to what it should |
| 8186 | have been. */ |
| 8187 | |
| 8188 | if (warning_count < count) |
| 8189 | { |
| 8190 | header_line *h; |
| 8191 | int fd; |
| 8192 | pid_t pid = child_open_exim(&fd); |
| 8193 | |
| 8194 | if (pid > 0) |
| 8195 | { |
| 8196 | uschar *wmf_text; |
| 8197 | FILE *wmf = NULL; |
| 8198 | FILE *f = fdopen(fd, "wb"); |
| 8199 | uschar * bound; |
| 8200 | transport_ctx tctx = {{0}}; |
| 8201 | |
| 8202 | if (warn_message_file) |
| 8203 | if (!(wmf = Ufopen(warn_message_file, "rb"))) |
| 8204 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for warning " |
| 8205 | "message texts: %s", warn_message_file, strerror(errno)); |
| 8206 | |
| 8207 | warnmsg_recipients = recipients; |
| 8208 | warnmsg_delay = queue_time < 120*60 |
| 8209 | ? string_sprintf("%d minutes", show_time/60) |
| 8210 | : string_sprintf("%d hours", show_time/3600); |
| 8211 | |
| 8212 | if (errors_reply_to) |
| 8213 | fprintf(f, "Reply-To: %s\n", errors_reply_to); |
| 8214 | fprintf(f, "Auto-Submitted: auto-replied\n"); |
| 8215 | moan_write_from(f); |
| 8216 | fprintf(f, "To: %s\n", recipients); |
| 8217 | moan_write_references(f, NULL); |
| 8218 | |
| 8219 | /* generated boundary string and output MIME-Headers */ |
| 8220 | bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand()); |
| 8221 | |
| 8222 | fprintf(f, "Content-Type: multipart/report;" |
| 8223 | " report-type=delivery-status; boundary=%s\n" |
| 8224 | "MIME-Version: 1.0\n", |
| 8225 | bound); |
| 8226 | |
| 8227 | if ((wmf_text = next_emf(wmf, US"header"))) |
| 8228 | fprintf(f, "%s\n", wmf_text); |
| 8229 | else |
| 8230 | fprintf(f, "Subject: Warning: message %s delayed %s\n\n", |
| 8231 | message_id, warnmsg_delay); |
| 8232 | |
| 8233 | /* output human readable part as text/plain section */ |
| 8234 | fprintf(f, "--%s\n" |
| 8235 | "Content-type: text/plain; charset=us-ascii\n\n", |
| 8236 | bound); |
| 8237 | |
| 8238 | if ((wmf_text = next_emf(wmf, US"intro"))) |
| 8239 | fprintf(f, "%s", CS wmf_text); |
| 8240 | else |
| 8241 | { |
| 8242 | fprintf(f, |
| 8243 | "This message was created automatically by mail delivery software.\n"); |
| 8244 | |
| 8245 | if (Ustrcmp(recipients, sender_address) == 0) |
| 8246 | fprintf(f, |
| 8247 | "A message that you sent has not yet been delivered to one or more of its\n" |
| 8248 | "recipients after more than "); |
| 8249 | |
| 8250 | else |
| 8251 | fprintf(f, |
| 8252 | "A message sent by\n\n <%s>\n\n" |
| 8253 | "has not yet been delivered to one or more of its recipients after more than \n", |
| 8254 | sender_address); |
| 8255 | |
| 8256 | fprintf(f, "%s on the queue on %s.\n\n" |
| 8257 | "The message identifier is: %s\n", |
| 8258 | warnmsg_delay, primary_hostname, message_id); |
| 8259 | |
| 8260 | for (h = header_list; h; h = h->next) |
| 8261 | if (strncmpic(h->text, US"Subject:", 8) == 0) |
| 8262 | fprintf(f, "The subject of the message is: %s", h->text + 9); |
| 8263 | else if (strncmpic(h->text, US"Date:", 5) == 0) |
| 8264 | fprintf(f, "The date of the message is: %s", h->text + 6); |
| 8265 | fputc('\n', f); |
| 8266 | |
| 8267 | fprintf(f, "The address%s to which the message has not yet been " |
| 8268 | "delivered %s:\n", |
| 8269 | !addr_defer->next ? "" : "es", |
| 8270 | !addr_defer->next ? "is": "are"); |
| 8271 | } |
| 8272 | |
| 8273 | /* List the addresses, with error information if allowed */ |
| 8274 | |
| 8275 | fputc('\n', f); |
| 8276 | for (address_item * addr = addr_defer; addr; addr = addr->next) |
| 8277 | { |
| 8278 | if (print_address_information(addr, f, US" ", US"\n ", US"")) |
| 8279 | print_address_error(addr, f, US"Delay reason: "); |
| 8280 | fputc('\n', f); |
| 8281 | } |
| 8282 | fputc('\n', f); |
| 8283 | |
| 8284 | /* Final text */ |
| 8285 | |
| 8286 | if (wmf) |
| 8287 | { |
| 8288 | if ((wmf_text = next_emf(wmf, US"final"))) |
| 8289 | fprintf(f, "%s", CS wmf_text); |
| 8290 | (void)fclose(wmf); |
| 8291 | } |
| 8292 | else |
| 8293 | { |
| 8294 | fprintf(f, |
| 8295 | "No action is required on your part. Delivery attempts will continue for\n" |
| 8296 | "some time, and this warning may be repeated at intervals if the message\n" |
| 8297 | "remains undelivered. Eventually the mail delivery software will give up,\n" |
| 8298 | "and when that happens, the message will be returned to you.\n"); |
| 8299 | } |
| 8300 | |
| 8301 | /* output machine readable part */ |
| 8302 | fprintf(f, "\n--%s\n" |
| 8303 | "Content-type: message/delivery-status\n\n" |
| 8304 | "Reporting-MTA: dns; %s\n", |
| 8305 | bound, |
| 8306 | smtp_active_hostname); |
| 8307 | |
| 8308 | |
| 8309 | if (dsn_envid) |
| 8310 | { |
| 8311 | /* must be decoded from xtext: see RFC 3461:6.3a */ |
| 8312 | uschar *xdec_envid; |
| 8313 | if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0) |
| 8314 | fprintf(f,"Original-Envelope-ID: %s\n", dsn_envid); |
| 8315 | else |
| 8316 | fprintf(f,"X-Original-Envelope-ID: error decoding xtext formatted ENVID\n"); |
| 8317 | } |
| 8318 | fputc('\n', f); |
| 8319 | |
| 8320 | for (address_item * addr = addr_defer; addr; addr = addr->next) |
| 8321 | { |
| 8322 | host_item * hu; |
| 8323 | |
| 8324 | print_dsn_addr_action(f, addr, US"delayed", US"4.0.0"); |
| 8325 | |
| 8326 | if ((hu = addr->host_used) && hu->name) |
| 8327 | { |
| 8328 | fprintf(f, "Remote-MTA: dns; %s\n", hu->name); |
| 8329 | print_dsn_diagnostic_code(addr, f); |
| 8330 | } |
| 8331 | fputc('\n', f); |
| 8332 | } |
| 8333 | |
| 8334 | fprintf(f, "--%s\n" |
| 8335 | "Content-type: text/rfc822-headers\n\n", |
| 8336 | bound); |
| 8337 | |
| 8338 | fflush(f); |
| 8339 | /* header only as required by RFC. only failure DSN needs to honor RET=FULL */ |
| 8340 | tctx.u.fd = fileno(f); |
| 8341 | tctx.options = topt_add_return_path | topt_no_body; |
| 8342 | transport_filter_argv = NULL; /* Just in case */ |
| 8343 | return_path = sender_address; /* In case not previously set */ |
| 8344 | |
| 8345 | /* Write the original email out */ |
| 8346 | /*XXX no checking for failure! buggy! */ |
| 8347 | transport_write_message(&tctx, 0); |
| 8348 | fflush(f); |
| 8349 | |
| 8350 | fprintf(f,"\n--%s--\n", bound); |
| 8351 | |
| 8352 | fflush(f); |
| 8353 | |
| 8354 | /* Close and wait for child process to complete, without a timeout. |
| 8355 | If there's an error, don't update the count. */ |
| 8356 | |
| 8357 | (void)fclose(f); |
| 8358 | if (child_close(pid, 0) == 0) |
| 8359 | { |
| 8360 | warning_count = count; |
| 8361 | update_spool = TRUE; /* Ensure spool rewritten */ |
| 8362 | } |
| 8363 | } |
| 8364 | } |
| 8365 | } |
| 8366 | |
| 8367 | /* Clear deliver_domain */ |
| 8368 | |
| 8369 | deliver_domain = NULL; |
| 8370 | |
| 8371 | /* If this was a first delivery attempt, unset the first time flag, and |
| 8372 | ensure that the spool gets updated. */ |
| 8373 | |
| 8374 | if (f.deliver_firsttime) |
| 8375 | { |
| 8376 | f.deliver_firsttime = FALSE; |
| 8377 | update_spool = TRUE; |
| 8378 | } |
| 8379 | |
| 8380 | /* If delivery was frozen and freeze_tell is set, generate an appropriate |
| 8381 | message, unless the message is a local error message (to avoid loops). Then |
| 8382 | log the freezing. If the text in "frozen_info" came from a system filter, |
| 8383 | it has been escaped into printing characters so as not to mess up log lines. |
| 8384 | For the "tell" message, we turn \n back into newline. Also, insert a newline |
| 8385 | near the start instead of the ": " string. */ |
| 8386 | |
| 8387 | if (f.deliver_freeze) |
| 8388 | { |
| 8389 | if (freeze_tell && freeze_tell[0] != 0 && !f.local_error_message) |
| 8390 | { |
| 8391 | uschar *s = string_copy(frozen_info); |
| 8392 | uschar *ss = Ustrstr(s, " by the system filter: "); |
| 8393 | |
| 8394 | if (ss != NULL) |
| 8395 | { |
| 8396 | ss[21] = '.'; |
| 8397 | ss[22] = '\n'; |
| 8398 | } |
| 8399 | |
| 8400 | ss = s; |
| 8401 | while (*ss != 0) |
| 8402 | { |
| 8403 | if (*ss == '\\' && ss[1] == 'n') |
| 8404 | { |
| 8405 | *ss++ = ' '; |
| 8406 | *ss++ = '\n'; |
| 8407 | } |
| 8408 | else ss++; |
| 8409 | } |
| 8410 | moan_tell_someone(freeze_tell, addr_defer, US"Message frozen", |
| 8411 | "Message %s has been frozen%s.\nThe sender is <%s>.\n", message_id, |
| 8412 | s, sender_address); |
| 8413 | } |
| 8414 | |
| 8415 | /* Log freezing just before we update the -H file, to minimize the chance |
| 8416 | of a race problem. */ |
| 8417 | |
| 8418 | deliver_msglog("*** Frozen%s\n", frozen_info); |
| 8419 | log_write(0, LOG_MAIN, "Frozen%s", frozen_info); |
| 8420 | } |
| 8421 | |
| 8422 | /* If there have been any updates to the non-recipients list, or other things |
| 8423 | that get written to the spool, we must now update the spool header file so |
| 8424 | that it has the right information for the next delivery attempt. If there |
| 8425 | was more than one address being delivered, the header_change update is done |
| 8426 | earlier, in case one succeeds and then something crashes. */ |
| 8427 | |
| 8428 | DEBUG(D_deliver) |
| 8429 | debug_printf("delivery deferred: update_spool=%d header_rewritten=%d\n", |
| 8430 | update_spool, f.header_rewritten); |
| 8431 | |
| 8432 | if (update_spool || f.header_rewritten) |
| 8433 | /* Panic-dies on error */ |
| 8434 | (void)spool_write_header(message_id, SW_DELIVERING, NULL); |
| 8435 | } |
| 8436 | |
| 8437 | /* Finished with the message log. If the message is complete, it will have |
| 8438 | been unlinked or renamed above. */ |
| 8439 | |
| 8440 | if (message_logs) (void)fclose(message_log); |
| 8441 | |
| 8442 | /* Now we can close and remove the journal file. Its only purpose is to record |
| 8443 | successfully completed deliveries asap so that this information doesn't get |
| 8444 | lost if Exim (or the machine) crashes. Forgetting about a failed delivery is |
| 8445 | not serious, as trying it again is not harmful. The journal might not be open |
| 8446 | if all addresses were deferred at routing or directing. Nevertheless, we must |
| 8447 | remove it if it exists (may have been lying around from a crash during the |
| 8448 | previous delivery attempt). We don't remove the journal if a delivery |
| 8449 | subprocess failed to pass back delivery information; this is controlled by |
| 8450 | the remove_journal flag. When the journal is left, we also don't move the |
| 8451 | message off the main spool if frozen and the option is set. It should get moved |
| 8452 | at the next attempt, after the journal has been inspected. */ |
| 8453 | |
| 8454 | if (journal_fd >= 0) (void)close(journal_fd); |
| 8455 | |
| 8456 | if (remove_journal) |
| 8457 | { |
| 8458 | uschar * fname = spool_fname(US"input", message_subdir, id, US"-J"); |
| 8459 | |
| 8460 | if (Uunlink(fname) < 0 && errno != ENOENT) |
| 8461 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s", fname, |
| 8462 | strerror(errno)); |
| 8463 | |
| 8464 | /* Move the message off the spool if requested */ |
| 8465 | |
| 8466 | #ifdef SUPPORT_MOVE_FROZEN_MESSAGES |
| 8467 | if (f.deliver_freeze && move_frozen_messages) |
| 8468 | (void)spool_move_message(id, message_subdir, US"", US"F"); |
| 8469 | #endif |
| 8470 | } |
| 8471 | |
| 8472 | /* Closing the data file frees the lock; if the file has been unlinked it |
| 8473 | will go away. Otherwise the message becomes available for another process |
| 8474 | to try delivery. */ |
| 8475 | |
| 8476 | (void)close(deliver_datafile); |
| 8477 | deliver_datafile = -1; |
| 8478 | DEBUG(D_deliver) debug_printf("end delivery of %s\n", id); |
| 8479 | #ifdef MEASURE_TIMING |
| 8480 | report_time_since(×tamp_startup, US"delivery end"); /* testcase 0005 */ |
| 8481 | #endif |
| 8482 | |
| 8483 | /* It is unlikely that there will be any cached resources, since they are |
| 8484 | released after routing, and in the delivery subprocesses. However, it's |
| 8485 | possible for an expansion for something afterwards (for example, |
| 8486 | expand_check_condition) to do a lookup. We must therefore be sure everything is |
| 8487 | released. */ |
| 8488 | |
| 8489 | search_tidyup(); |
| 8490 | acl_where = ACL_WHERE_UNKNOWN; |
| 8491 | return final_yield; |
| 8492 | } |
| 8493 | |
| 8494 | |
| 8495 | |
| 8496 | void |
| 8497 | tcp_init(void) |
| 8498 | { |
| 8499 | #ifdef EXIM_TFO_PROBE |
| 8500 | tfo_probe(); |
| 8501 | #else |
| 8502 | f.tcp_fastopen_ok = TRUE; |
| 8503 | #endif |
| 8504 | } |
| 8505 | |
| 8506 | |
| 8507 | uschar * |
| 8508 | deliver_get_sender_address (uschar * id) |
| 8509 | { |
| 8510 | int rc; |
| 8511 | uschar * new_sender_address, |
| 8512 | * save_sender_address; |
| 8513 | BOOL save_qr = f.queue_running; |
| 8514 | uschar * spoolname; |
| 8515 | |
| 8516 | /* make spool_open_datafile non-noisy on fail */ |
| 8517 | |
| 8518 | f.queue_running = TRUE; |
| 8519 | |
| 8520 | /* Side effect: message_subdir is set for the (possibly split) spool directory */ |
| 8521 | |
| 8522 | deliver_datafile = spool_open_datafile(id); |
| 8523 | f.queue_running = save_qr; |
| 8524 | if (deliver_datafile < 0) |
| 8525 | return NULL; |
| 8526 | |
| 8527 | /* Save and restore the global sender_address. I'm not sure if we should |
| 8528 | not save/restore all the other global variables too, because |
| 8529 | spool_read_header() may change all of them. But OTOH, when this |
| 8530 | deliver_get_sender_address() gets called, the current message is done |
| 8531 | already and nobody needs the globals anymore. (HS12, 2015-08-21) */ |
| 8532 | |
| 8533 | spoolname = string_sprintf("%s-H", id); |
| 8534 | save_sender_address = sender_address; |
| 8535 | |
| 8536 | rc = spool_read_header(spoolname, TRUE, TRUE); |
| 8537 | |
| 8538 | new_sender_address = sender_address; |
| 8539 | sender_address = save_sender_address; |
| 8540 | |
| 8541 | if (rc != spool_read_OK) |
| 8542 | return NULL; |
| 8543 | |
| 8544 | assert(new_sender_address); |
| 8545 | |
| 8546 | (void)close(deliver_datafile); |
| 8547 | deliver_datafile = -1; |
| 8548 | |
| 8549 | return new_sender_address; |
| 8550 | } |
| 8551 | |
| 8552 | |
| 8553 | |
| 8554 | void |
| 8555 | delivery_re_exec(int exec_type) |
| 8556 | { |
| 8557 | uschar * where; |
| 8558 | |
| 8559 | if (cutthrough.cctx.sock >= 0 && cutthrough.callout_hold_only) |
| 8560 | { |
| 8561 | int channel_fd = cutthrough.cctx.sock; |
| 8562 | |
| 8563 | smtp_peer_options = cutthrough.peer_options; |
| 8564 | continue_sequence = 0; |
| 8565 | |
| 8566 | #ifndef DISABLE_TLS |
| 8567 | if (cutthrough.is_tls) |
| 8568 | { |
| 8569 | int pfd[2], pid; |
| 8570 | |
| 8571 | smtp_peer_options |= OPTION_TLS; |
| 8572 | sending_ip_address = cutthrough.snd_ip; |
| 8573 | sending_port = cutthrough.snd_port; |
| 8574 | |
| 8575 | where = US"socketpair"; |
| 8576 | if (socketpair(AF_UNIX, SOCK_STREAM, 0, pfd) != 0) |
| 8577 | goto fail; |
| 8578 | |
| 8579 | where = US"fork"; |
| 8580 | if ((pid = fork()) < 0) |
| 8581 | goto fail; |
| 8582 | |
| 8583 | else if (pid == 0) /* child: fork again to totally disconnect */ |
| 8584 | { |
| 8585 | testharness_pause_ms(100); /* let parent debug out */ |
| 8586 | /* does not return */ |
| 8587 | smtp_proxy_tls(cutthrough.cctx.tls_ctx, big_buffer, big_buffer_size, |
| 8588 | pfd, 5*60); |
| 8589 | } |
| 8590 | |
| 8591 | DEBUG(D_transport) debug_printf("proxy-proc inter-pid %d\n", pid); |
| 8592 | close(pfd[0]); |
| 8593 | waitpid(pid, NULL, 0); |
| 8594 | (void) close(channel_fd); /* release the client socket */ |
| 8595 | channel_fd = pfd[1]; |
| 8596 | } |
| 8597 | #endif |
| 8598 | |
| 8599 | transport_do_pass_socket(cutthrough.transport, cutthrough.host.name, |
| 8600 | cutthrough.host.address, message_id, channel_fd); |
| 8601 | } |
| 8602 | else |
| 8603 | { |
| 8604 | cancel_cutthrough_connection(TRUE, US"non-continued delivery"); |
| 8605 | (void) child_exec_exim(exec_type, FALSE, NULL, FALSE, 2, US"-Mc", message_id); |
| 8606 | } |
| 8607 | return; /* compiler quietening; control does not reach here. */ |
| 8608 | |
| 8609 | #ifndef DISABLE_TLS |
| 8610 | fail: |
| 8611 | log_write(0, |
| 8612 | LOG_MAIN | (exec_type == CEE_EXEC_EXIT ? LOG_PANIC : LOG_PANIC_DIE), |
| 8613 | "delivery re-exec %s failed: %s", where, strerror(errno)); |
| 8614 | |
| 8615 | /* Get here if exec_type == CEE_EXEC_EXIT. |
| 8616 | Note: this must be _exit(), not exit(). */ |
| 8617 | |
| 8618 | _exit(EX_EXECFAILED); |
| 8619 | #endif |
| 8620 | } |
| 8621 | |
| 8622 | /* vi: aw ai sw=2 |
| 8623 | */ |
| 8624 | /* End of deliver.c */ |