| 1 | /* $Cambridge: exim/src/src/transports/autoreply.c,v 1.10 2007/01/08 10:50:20 ph10 Exp $ */ |
| 2 | |
| 3 | /************************************************* |
| 4 | * Exim - an Internet mail transport agent * |
| 5 | *************************************************/ |
| 6 | |
| 7 | /* Copyright (c) University of Cambridge 1995 - 2007 */ |
| 8 | /* See the file NOTICE for conditions of use and distribution. */ |
| 9 | |
| 10 | |
| 11 | #include "../exim.h" |
| 12 | #include "autoreply.h" |
| 13 | |
| 14 | |
| 15 | |
| 16 | /* Options specific to the autoreply transport. They must be in alphabetic |
| 17 | order (note that "_" comes before the lower case letters). Those starting |
| 18 | with "*" are not settable by the user but are used by the option-reading |
| 19 | software for alternative value types. Some options are publicly visible and so |
| 20 | are stored in the driver instance block. These are flagged with opt_public. */ |
| 21 | |
| 22 | optionlist autoreply_transport_options[] = { |
| 23 | { "bcc", opt_stringptr, |
| 24 | (void *)offsetof(autoreply_transport_options_block, bcc) }, |
| 25 | { "cc", opt_stringptr, |
| 26 | (void *)offsetof(autoreply_transport_options_block, cc) }, |
| 27 | { "file", opt_stringptr, |
| 28 | (void *)offsetof(autoreply_transport_options_block, file) }, |
| 29 | { "file_expand", opt_bool, |
| 30 | (void *)offsetof(autoreply_transport_options_block, file_expand) }, |
| 31 | { "file_optional", opt_bool, |
| 32 | (void *)offsetof(autoreply_transport_options_block, file_optional) }, |
| 33 | { "from", opt_stringptr, |
| 34 | (void *)offsetof(autoreply_transport_options_block, from) }, |
| 35 | { "headers", opt_stringptr, |
| 36 | (void *)offsetof(autoreply_transport_options_block, headers) }, |
| 37 | { "log", opt_stringptr, |
| 38 | (void *)offsetof(autoreply_transport_options_block, logfile) }, |
| 39 | { "mode", opt_octint, |
| 40 | (void *)offsetof(autoreply_transport_options_block, mode) }, |
| 41 | { "never_mail", opt_stringptr, |
| 42 | (void *)offsetof(autoreply_transport_options_block, never_mail) }, |
| 43 | { "once", opt_stringptr, |
| 44 | (void *)offsetof(autoreply_transport_options_block, oncelog) }, |
| 45 | { "once_file_size", opt_int, |
| 46 | (void *)offsetof(autoreply_transport_options_block, once_file_size) }, |
| 47 | { "once_repeat", opt_stringptr, |
| 48 | (void *)offsetof(autoreply_transport_options_block, once_repeat) }, |
| 49 | { "reply_to", opt_stringptr, |
| 50 | (void *)offsetof(autoreply_transport_options_block, reply_to) }, |
| 51 | { "return_message", opt_bool, |
| 52 | (void *)offsetof(autoreply_transport_options_block, return_message) }, |
| 53 | { "subject", opt_stringptr, |
| 54 | (void *)offsetof(autoreply_transport_options_block, subject) }, |
| 55 | { "text", opt_stringptr, |
| 56 | (void *)offsetof(autoreply_transport_options_block, text) }, |
| 57 | { "to", opt_stringptr, |
| 58 | (void *)offsetof(autoreply_transport_options_block, to) }, |
| 59 | }; |
| 60 | |
| 61 | /* Size of the options list. An extern variable has to be used so that its |
| 62 | address can appear in the tables drtables.c. */ |
| 63 | |
| 64 | int autoreply_transport_options_count = |
| 65 | sizeof(autoreply_transport_options)/sizeof(optionlist); |
| 66 | |
| 67 | /* Default private options block for the autoreply transport. */ |
| 68 | |
| 69 | autoreply_transport_options_block autoreply_transport_option_defaults = { |
| 70 | NULL, /* from */ |
| 71 | NULL, /* reply_to */ |
| 72 | NULL, /* to */ |
| 73 | NULL, /* cc */ |
| 74 | NULL, /* bcc */ |
| 75 | NULL, /* subject */ |
| 76 | NULL, /* headers */ |
| 77 | NULL, /* text */ |
| 78 | NULL, /* file */ |
| 79 | NULL, /* logfile */ |
| 80 | NULL, /* oncelog */ |
| 81 | NULL, /* once_repeat */ |
| 82 | NULL, /* never_mail */ |
| 83 | 0600, /* mode */ |
| 84 | 0, /* once_file_size */ |
| 85 | FALSE, /* file_expand */ |
| 86 | FALSE, /* file_optional */ |
| 87 | FALSE /* return message */ |
| 88 | }; |
| 89 | |
| 90 | |
| 91 | |
| 92 | /* Type of text for the checkexpand() function */ |
| 93 | |
| 94 | enum { cke_text, cke_hdr, cke_file }; |
| 95 | |
| 96 | |
| 97 | |
| 98 | /************************************************* |
| 99 | * Initialization entry point * |
| 100 | *************************************************/ |
| 101 | |
| 102 | /* Called for each instance, after its options have been read, to |
| 103 | enable consistency checks to be done, or anything else that needs |
| 104 | to be set up. */ |
| 105 | |
| 106 | void |
| 107 | autoreply_transport_init(transport_instance *tblock) |
| 108 | { |
| 109 | /* |
| 110 | autoreply_transport_options_block *ob = |
| 111 | (autoreply_transport_options_block *)(tblock->options_block); |
| 112 | */ |
| 113 | |
| 114 | /* If a fixed uid field is set, then a gid field must also be set. */ |
| 115 | |
| 116 | if (tblock->uid_set && !tblock->gid_set && tblock->expand_gid == NULL) |
| 117 | log_write(0, LOG_PANIC_DIE|LOG_CONFIG, |
| 118 | "user set without group for the %s transport", tblock->name); |
| 119 | } |
| 120 | |
| 121 | |
| 122 | |
| 123 | |
| 124 | /************************************************* |
| 125 | * Expand string and check * |
| 126 | *************************************************/ |
| 127 | |
| 128 | /* If the expansion fails, the error is set up in the address. Expanded |
| 129 | strings must be checked to ensure they contain only printing characters |
| 130 | and white space. If not, the function fails. |
| 131 | |
| 132 | Arguments: |
| 133 | s string to expand |
| 134 | addr address that is being worked on |
| 135 | name transport name, for error text |
| 136 | type type, for checking content: |
| 137 | cke_text => no check |
| 138 | cke_hdr => header, allow \n + whitespace |
| 139 | cke_file => file name, no non-printers allowed |
| 140 | |
| 141 | Returns: expanded string if expansion succeeds; |
| 142 | NULL otherwise |
| 143 | */ |
| 144 | |
| 145 | static uschar * |
| 146 | checkexpand(uschar *s, address_item *addr, uschar *name, int type) |
| 147 | { |
| 148 | uschar *t; |
| 149 | uschar *ss = expand_string(s); |
| 150 | |
| 151 | if (ss == NULL) |
| 152 | { |
| 153 | addr->transport_return = FAIL; |
| 154 | addr->message = string_sprintf("Expansion of \"%s\" failed in %s transport: " |
| 155 | "%s", s, name, expand_string_message); |
| 156 | return NULL; |
| 157 | } |
| 158 | |
| 159 | if (type != cke_text) for (t = ss; *t != 0; t++) |
| 160 | { |
| 161 | int c = *t; |
| 162 | if (mac_isprint(c)) continue; |
| 163 | if (type == cke_hdr && c == '\n' && (t[1] == ' ' || t[1] == '\t')) continue; |
| 164 | s = string_printing(s); |
| 165 | addr->transport_return = FAIL; |
| 166 | addr->message = string_sprintf("Expansion of \"%s\" in %s transport " |
| 167 | "contains non-printing character %d", s, name, c); |
| 168 | return NULL; |
| 169 | } |
| 170 | |
| 171 | return ss; |
| 172 | } |
| 173 | |
| 174 | |
| 175 | |
| 176 | |
| 177 | /************************************************* |
| 178 | * Check a header line for never_mail * |
| 179 | *************************************************/ |
| 180 | |
| 181 | /* This is called to check to, cc, and bcc for addresses in the never_mail |
| 182 | list. Any that are found are removed. |
| 183 | |
| 184 | Arguments: |
| 185 | listptr points to the list of addresses |
| 186 | never_mail an address list, already expanded |
| 187 | |
| 188 | Returns: nothing |
| 189 | */ |
| 190 | |
| 191 | static void |
| 192 | check_never_mail(uschar **listptr, uschar *never_mail) |
| 193 | { |
| 194 | uschar *s = *listptr; |
| 195 | |
| 196 | while (*s != 0) |
| 197 | { |
| 198 | uschar *error, *next; |
| 199 | uschar *e = parse_find_address_end(s, FALSE); |
| 200 | int terminator = *e; |
| 201 | int start, end, domain, rc; |
| 202 | |
| 203 | /* Temporarily terminate the string at the address end while extracting |
| 204 | the operative address within. */ |
| 205 | |
| 206 | *e = 0; |
| 207 | next = parse_extract_address(s, &error, &start, &end, &domain, FALSE); |
| 208 | *e = terminator; |
| 209 | |
| 210 | /* If there is some kind of syntax error, just give up on this header |
| 211 | line. */ |
| 212 | |
| 213 | if (next == NULL) break; |
| 214 | |
| 215 | /* See if the address is on the never_mail list */ |
| 216 | |
| 217 | rc = match_address_list(next, /* address to check */ |
| 218 | TRUE, /* start caseless */ |
| 219 | FALSE, /* don't expand the list */ |
| 220 | &never_mail, /* the list */ |
| 221 | NULL, /* no caching */ |
| 222 | -1, /* no expand setup */ |
| 223 | 0, /* separator from list */ |
| 224 | NULL); /* no lookup value return */ |
| 225 | |
| 226 | if (rc == OK) /* Remove this address */ |
| 227 | { |
| 228 | DEBUG(D_transport) |
| 229 | debug_printf("discarding recipient %s (matched never_mail)\n", next); |
| 230 | if (terminator == ',') e++; |
| 231 | memmove(s, e, Ustrlen(e) + 1); |
| 232 | } |
| 233 | else /* Skip over this address */ |
| 234 | { |
| 235 | s = e; |
| 236 | if (terminator == ',') s++; |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | /* Check to see if we removed the last address, leaving a terminating comma |
| 241 | that needs to be removed */ |
| 242 | |
| 243 | s = *listptr + Ustrlen(*listptr); |
| 244 | while (s > *listptr && (isspace(s[-1]) || s[-1] == ',')) s--; |
| 245 | *s = 0; |
| 246 | |
| 247 | /* Check to see if there any addresses left; if not, set NULL */ |
| 248 | |
| 249 | s = *listptr; |
| 250 | while (s != 0 && isspace(*s)) s++; |
| 251 | if (*s == 0) *listptr = NULL; |
| 252 | } |
| 253 | |
| 254 | |
| 255 | |
| 256 | /************************************************* |
| 257 | * Main entry point * |
| 258 | *************************************************/ |
| 259 | |
| 260 | /* See local README for interface details. This transport always returns |
| 261 | FALSE, indicating that the top address has the status for all - though in fact |
| 262 | this transport can handle only one address at at time anyway. */ |
| 263 | |
| 264 | BOOL |
| 265 | autoreply_transport_entry( |
| 266 | transport_instance *tblock, /* data for this instantiation */ |
| 267 | address_item *addr) /* address we are working on */ |
| 268 | { |
| 269 | int fd, pid, rc; |
| 270 | int cache_fd = -1; |
| 271 | int log_fd = -1; |
| 272 | int cache_size = 0; |
| 273 | int add_size = 0; |
| 274 | EXIM_DB *dbm_file = NULL; |
| 275 | BOOL file_expand, return_message; |
| 276 | uschar *from, *reply_to, *to, *cc, *bcc, *subject, *headers, *text, *file; |
| 277 | uschar *logfile, *oncelog; |
| 278 | uschar *cache_buff = NULL; |
| 279 | uschar *cache_time = NULL; |
| 280 | uschar *message_id = NULL; |
| 281 | header_line *h; |
| 282 | time_t now = time(NULL); |
| 283 | time_t once_repeat_sec = 0; |
| 284 | FILE *f; |
| 285 | FILE *ff = NULL; |
| 286 | |
| 287 | autoreply_transport_options_block *ob = |
| 288 | (autoreply_transport_options_block *)(tblock->options_block); |
| 289 | |
| 290 | DEBUG(D_transport) debug_printf("%s transport entered\n", tblock->name); |
| 291 | |
| 292 | /* Set up for the good case */ |
| 293 | |
| 294 | addr->transport_return = OK; |
| 295 | addr->basic_errno = 0; |
| 296 | |
| 297 | /* If the address is pointing to a reply block, then take all the data |
| 298 | from that block. It has typically been set up by a mail filter processing |
| 299 | router. Otherwise, the data must be supplied by this transport, and |
| 300 | it has to be expanded here. */ |
| 301 | |
| 302 | if (addr->reply != NULL) |
| 303 | { |
| 304 | DEBUG(D_transport) debug_printf("taking data from address\n"); |
| 305 | from = addr->reply->from; |
| 306 | reply_to = addr->reply->reply_to; |
| 307 | to = addr->reply->to; |
| 308 | cc = addr->reply->cc; |
| 309 | bcc = addr->reply->bcc; |
| 310 | subject = addr->reply->subject; |
| 311 | headers = addr->reply->headers; |
| 312 | text = addr->reply->text; |
| 313 | file = addr->reply->file; |
| 314 | logfile = addr->reply->logfile; |
| 315 | oncelog = addr->reply->oncelog; |
| 316 | once_repeat_sec = addr->reply->once_repeat; |
| 317 | file_expand = addr->reply->file_expand; |
| 318 | expand_forbid = addr->reply->expand_forbid; |
| 319 | return_message = addr->reply->return_message; |
| 320 | } |
| 321 | else |
| 322 | { |
| 323 | uschar *oncerepeat = ob->once_repeat; |
| 324 | |
| 325 | DEBUG(D_transport) debug_printf("taking data from transport\n"); |
| 326 | from = ob->from; |
| 327 | reply_to = ob->reply_to; |
| 328 | to = ob->to; |
| 329 | cc = ob->cc; |
| 330 | bcc = ob->bcc; |
| 331 | subject = ob->subject; |
| 332 | headers = ob->headers; |
| 333 | text = ob->text; |
| 334 | file = ob->file; |
| 335 | logfile = ob->logfile; |
| 336 | oncelog = ob->oncelog; |
| 337 | file_expand = ob->file_expand; |
| 338 | return_message = ob->return_message; |
| 339 | |
| 340 | if ((from != NULL && |
| 341 | (from = checkexpand(from, addr, tblock->name, cke_hdr)) == NULL) || |
| 342 | (reply_to != NULL && |
| 343 | (reply_to = checkexpand(reply_to, addr, tblock->name, cke_hdr)) == NULL) || |
| 344 | (to != NULL && |
| 345 | (to = checkexpand(to, addr, tblock->name, cke_hdr)) == NULL) || |
| 346 | (cc != NULL && |
| 347 | (cc = checkexpand(cc, addr, tblock->name, cke_hdr)) == NULL) || |
| 348 | (bcc != NULL && |
| 349 | (bcc = checkexpand(bcc, addr, tblock->name, cke_hdr)) == NULL) || |
| 350 | (subject != NULL && |
| 351 | (subject = checkexpand(subject, addr, tblock->name, cke_hdr)) == NULL) || |
| 352 | (headers != NULL && |
| 353 | (headers = checkexpand(headers, addr, tblock->name, cke_text)) == NULL) || |
| 354 | (text != NULL && |
| 355 | (text = checkexpand(text, addr, tblock->name, cke_text)) == NULL) || |
| 356 | (file != NULL && |
| 357 | (file = checkexpand(file, addr, tblock->name, cke_file)) == NULL) || |
| 358 | (logfile != NULL && |
| 359 | (logfile = checkexpand(logfile, addr, tblock->name, cke_file)) == NULL) || |
| 360 | (oncelog != NULL && |
| 361 | (oncelog = checkexpand(oncelog, addr, tblock->name, cke_file)) == NULL) || |
| 362 | (oncerepeat != NULL && |
| 363 | (oncerepeat = checkexpand(oncerepeat, addr, tblock->name, cke_file)) == NULL)) |
| 364 | return FALSE; |
| 365 | |
| 366 | if (oncerepeat != NULL) |
| 367 | { |
| 368 | once_repeat_sec = readconf_readtime(oncerepeat, 0, FALSE); |
| 369 | if (once_repeat_sec < 0) |
| 370 | { |
| 371 | addr->transport_return = FAIL; |
| 372 | addr->message = string_sprintf("Invalid time value \"%s\" for " |
| 373 | "\"once_repeat\" in %s transport", oncerepeat, tblock->name); |
| 374 | return FALSE; |
| 375 | } |
| 376 | } |
| 377 | } |
| 378 | |
| 379 | /* If the never_mail option is set, we have to scan all the recipients and |
| 380 | remove those that match. */ |
| 381 | |
| 382 | if (ob->never_mail != NULL) |
| 383 | { |
| 384 | uschar *never_mail = expand_string(ob->never_mail); |
| 385 | |
| 386 | if (never_mail == NULL) |
| 387 | { |
| 388 | addr->transport_return = FAIL; |
| 389 | addr->message = string_sprintf("Failed to expand \"%s\" for " |
| 390 | "\"never_mail\" in %s transport", ob->never_mail, tblock->name); |
| 391 | return FALSE; |
| 392 | } |
| 393 | |
| 394 | if (to != NULL) check_never_mail(&to, never_mail); |
| 395 | if (cc != NULL) check_never_mail(&cc, never_mail); |
| 396 | if (bcc != NULL) check_never_mail(&bcc, never_mail); |
| 397 | |
| 398 | if (to == NULL && cc == NULL && bcc == NULL) |
| 399 | { |
| 400 | DEBUG(D_transport) |
| 401 | debug_printf("*** all recipients removed by never_mail\n"); |
| 402 | return OK; |
| 403 | } |
| 404 | } |
| 405 | |
| 406 | /* If the -N option is set, can't do any more. */ |
| 407 | |
| 408 | if (dont_deliver) |
| 409 | { |
| 410 | DEBUG(D_transport) |
| 411 | debug_printf("*** delivery by %s transport bypassed by -N option\n", |
| 412 | tblock->name); |
| 413 | return FALSE; |
| 414 | } |
| 415 | |
| 416 | |
| 417 | /* If the oncelog field is set, we send want to send only one message to the |
| 418 | given recipient(s). This works only on the "To" field. If there is no "To" |
| 419 | field, the message is always sent. If the To: field contains more than one |
| 420 | recipient, the effect might not be quite as envisaged. If once_file_size is |
| 421 | set, instead of a dbm file, we use a regular file containing a circular buffer |
| 422 | recipient cache. */ |
| 423 | |
| 424 | if (oncelog != NULL && *oncelog != 0 && to != NULL) |
| 425 | { |
| 426 | time_t then = 0; |
| 427 | |
| 428 | /* Handle fixed-size cache file. */ |
| 429 | |
| 430 | if (ob->once_file_size > 0) |
| 431 | { |
| 432 | uschar *p; |
| 433 | struct stat statbuf; |
| 434 | cache_fd = Uopen(oncelog, O_CREAT|O_RDWR, ob->mode); |
| 435 | |
| 436 | if (cache_fd < 0 || fstat(cache_fd, &statbuf) != 0) |
| 437 | { |
| 438 | addr->transport_return = DEFER; |
| 439 | addr->message = string_sprintf("Failed to %s \"once\" file %s when " |
| 440 | "sending message from %s transport: %s", |
| 441 | (cache_fd < 0)? "open" : "stat", oncelog, tblock->name, |
| 442 | strerror(errno)); |
| 443 | goto END_OFF; |
| 444 | } |
| 445 | |
| 446 | /* Get store in the temporary pool and read the entire file into it. We get |
| 447 | an amount of store that is big enough to add the new entry on the end if we |
| 448 | need to do that. */ |
| 449 | |
| 450 | cache_size = statbuf.st_size; |
| 451 | add_size = sizeof(time_t) + Ustrlen(to) + 1; |
| 452 | cache_buff = store_get(cache_size + add_size); |
| 453 | |
| 454 | if (read(cache_fd, cache_buff, cache_size) != cache_size) |
| 455 | { |
| 456 | addr->transport_return = DEFER; |
| 457 | addr->basic_errno = errno; |
| 458 | addr->message = US"error while reading \"once\" file"; |
| 459 | goto END_OFF; |
| 460 | } |
| 461 | |
| 462 | DEBUG(D_transport) debug_printf("%d bytes read from %s\n", cache_size, oncelog); |
| 463 | |
| 464 | /* Scan the data for this recipient. Each entry in the file starts with |
| 465 | a time_t sized time value, followed by the address, followed by a binary |
| 466 | zero. If we find a match, put the time into "then", and the place where it |
| 467 | was found into "cache_time". Otherwise, "then" is left at zero. */ |
| 468 | |
| 469 | p = cache_buff; |
| 470 | while (p < cache_buff + cache_size) |
| 471 | { |
| 472 | uschar *s = p + sizeof(time_t); |
| 473 | uschar *nextp = s + Ustrlen(s) + 1; |
| 474 | if (Ustrcmp(to, s) == 0) |
| 475 | { |
| 476 | memcpy(&then, p, sizeof(time_t)); |
| 477 | cache_time = p; |
| 478 | break; |
| 479 | } |
| 480 | p = nextp; |
| 481 | } |
| 482 | } |
| 483 | |
| 484 | /* Use a DBM file for the list of previous recipients. */ |
| 485 | |
| 486 | else |
| 487 | { |
| 488 | EXIM_DATUM key_datum, result_datum; |
| 489 | EXIM_DBOPEN(oncelog, O_RDWR|O_CREAT, ob->mode, &dbm_file); |
| 490 | if (dbm_file == NULL) |
| 491 | { |
| 492 | addr->transport_return = DEFER; |
| 493 | addr->message = string_sprintf("Failed to open %s file %s when sending " |
| 494 | "message from %s transport: %s", EXIM_DBTYPE, oncelog, tblock->name, |
| 495 | strerror(errno)); |
| 496 | goto END_OFF; |
| 497 | } |
| 498 | |
| 499 | EXIM_DATUM_INIT(key_datum); /* Some DBM libraries need datums */ |
| 500 | EXIM_DATUM_INIT(result_datum); /* to be cleared */ |
| 501 | EXIM_DATUM_DATA(key_datum) = CS to; |
| 502 | EXIM_DATUM_SIZE(key_datum) = Ustrlen(to) + 1; |
| 503 | |
| 504 | if (EXIM_DBGET(dbm_file, key_datum, result_datum)) |
| 505 | { |
| 506 | /* If the datum size is that of a binary time, we are in the new world |
| 507 | where messages are sent periodically. Otherwise the file is an old one, |
| 508 | where the datum was filled with a tod_log time, which is assumed to be |
| 509 | different in size. For that, only one message is ever sent. This change |
| 510 | introduced at Exim 3.00. In a couple of years' time the test on the size |
| 511 | can be abolished. */ |
| 512 | |
| 513 | if (EXIM_DATUM_SIZE(result_datum) == sizeof(time_t)) |
| 514 | { |
| 515 | memcpy(&then, EXIM_DATUM_DATA(result_datum), sizeof(time_t)); |
| 516 | } |
| 517 | else then = now; |
| 518 | } |
| 519 | } |
| 520 | |
| 521 | /* Either "then" is set zero, if no message has yet been sent, or it |
| 522 | is set to the time of the last sending. */ |
| 523 | |
| 524 | if (then != 0 && (once_repeat_sec <= 0 || now - then < once_repeat_sec)) |
| 525 | { |
| 526 | DEBUG(D_transport) debug_printf("message previously sent to %s%s\n", to, |
| 527 | (once_repeat_sec > 0)? " and repeat time not reached" : ""); |
| 528 | log_fd = Uopen(logfile, O_WRONLY|O_APPEND|O_CREAT, ob->mode); |
| 529 | if (log_fd >= 0) |
| 530 | { |
| 531 | uschar *ptr = log_buffer; |
| 532 | sprintf(CS ptr, "%s\n previously sent to %.200s\n", tod_stamp(tod_log), to); |
| 533 | while(*ptr) ptr++; |
| 534 | (void)write(log_fd, log_buffer, ptr - log_buffer); |
| 535 | (void)close(log_fd); |
| 536 | } |
| 537 | goto END_OFF; |
| 538 | } |
| 539 | |
| 540 | DEBUG(D_transport) debug_printf("%s %s\n", (then <= 0)? |
| 541 | "no previous message sent to" : "repeat time reached for", to); |
| 542 | } |
| 543 | |
| 544 | /* We are going to send a message. Ensure any requested file is available. */ |
| 545 | |
| 546 | if (file != NULL) |
| 547 | { |
| 548 | ff = Ufopen(file, "rb"); |
| 549 | if (ff == NULL && !ob->file_optional) |
| 550 | { |
| 551 | addr->transport_return = DEFER; |
| 552 | addr->message = string_sprintf("Failed to open file %s when sending " |
| 553 | "message from %s transport: %s", file, tblock->name, strerror(errno)); |
| 554 | return FALSE; |
| 555 | } |
| 556 | } |
| 557 | |
| 558 | /* Make a subprocess to send the message */ |
| 559 | |
| 560 | pid = child_open_exim(&fd); |
| 561 | |
| 562 | /* Creation of child failed; defer this delivery. */ |
| 563 | |
| 564 | if (pid < 0) |
| 565 | { |
| 566 | addr->transport_return = DEFER; |
| 567 | addr->message = string_sprintf("Failed to create child process to send " |
| 568 | "message from %s transport: %s", tblock->name, strerror(errno)); |
| 569 | DEBUG(D_transport) debug_printf("%s\n", addr->message); |
| 570 | return FALSE; |
| 571 | } |
| 572 | |
| 573 | /* Create the message to be sent - recipients are taken from the headers, |
| 574 | as the -t option is used. The "headers" stuff *must* be last in case there |
| 575 | are newlines in it which might, if placed earlier, screw up other headers. */ |
| 576 | |
| 577 | f = fdopen(fd, "wb"); |
| 578 | |
| 579 | if (from != NULL) fprintf(f, "From: %s\n", from); |
| 580 | if (reply_to != NULL) fprintf(f, "Reply-To: %s\n", reply_to); |
| 581 | if (to != NULL) fprintf(f, "To: %s\n", to); |
| 582 | if (cc != NULL) fprintf(f, "Cc: %s\n", cc); |
| 583 | if (bcc != NULL) fprintf(f, "Bcc: %s\n", bcc); |
| 584 | if (subject != NULL) fprintf(f, "Subject: %s\n", subject); |
| 585 | |
| 586 | /* Generate In-Reply-To from the message_id header; there should |
| 587 | always be one, but code defensively. */ |
| 588 | |
| 589 | for (h = header_list; h != NULL; h = h->next) |
| 590 | if (h->type == htype_id) break; |
| 591 | |
| 592 | if (h != NULL) |
| 593 | { |
| 594 | message_id = Ustrchr(h->text, ':') + 1; |
| 595 | while (isspace(*message_id)) message_id++; |
| 596 | fprintf(f, "In-Reply-To: %s", message_id); |
| 597 | } |
| 598 | |
| 599 | /* Generate a References header if there is at least one of Message-ID:, |
| 600 | References:, or In-Reply-To: (see RFC 2822). */ |
| 601 | |
| 602 | for (h = header_list; h != NULL; h = h->next) |
| 603 | if (h->type != htype_old && strncmpic(US"References:", h->text, 11) == 0) |
| 604 | break; |
| 605 | |
| 606 | if (h == NULL) |
| 607 | for (h = header_list; h != NULL; h = h->next) |
| 608 | if (h->type != htype_old && strncmpic(US"In-Reply-To:", h->text, 12) == 0) |
| 609 | break; |
| 610 | |
| 611 | /* We limit the total length of references. Although there is no fixed |
| 612 | limit, some systems do not like headers growing beyond recognition. |
| 613 | Keep the first message ID for the thread root and the last few for |
| 614 | the position inside the thread, up to a maximum of 12 altogether. */ |
| 615 | |
| 616 | if (h != NULL || message_id != NULL) |
| 617 | { |
| 618 | fprintf(f, "References:"); |
| 619 | if (h != NULL) |
| 620 | { |
| 621 | uschar *s, *id, *error; |
| 622 | uschar *referenced_ids[12]; |
| 623 | int reference_count = 0; |
| 624 | int i; |
| 625 | |
| 626 | s = Ustrchr(h->text, ':') + 1; |
| 627 | parse_allow_group = FALSE; |
| 628 | while (*s != 0 && (s = parse_message_id(s, &id, &error)) != NULL) |
| 629 | { |
| 630 | if (reference_count == sizeof(referenced_ids)/sizeof(uschar *)) |
| 631 | { |
| 632 | memmove(referenced_ids + 1, referenced_ids + 2, |
| 633 | sizeof(referenced_ids) - 2*sizeof(uschar *)); |
| 634 | referenced_ids[reference_count - 1] = id; |
| 635 | } |
| 636 | else referenced_ids[reference_count++] = id; |
| 637 | } |
| 638 | for (i = 0; i < reference_count; ++i) fprintf(f, " %s", referenced_ids[i]); |
| 639 | } |
| 640 | |
| 641 | /* The message id will have a newline on the end of it. */ |
| 642 | |
| 643 | if (message_id != NULL) fprintf(f, " %s", message_id); |
| 644 | else fprintf(f, "\n"); |
| 645 | } |
| 646 | |
| 647 | /* Add an Auto-Submitted: header */ |
| 648 | |
| 649 | fprintf(f, "Auto-Submitted: auto-replied\n"); |
| 650 | |
| 651 | /* Add any specially requested headers */ |
| 652 | |
| 653 | if (headers != NULL) fprintf(f, "%s\n", headers); |
| 654 | fprintf(f, "\n"); |
| 655 | |
| 656 | if (text != NULL) |
| 657 | { |
| 658 | fprintf(f, "%s", CS text); |
| 659 | if (text[Ustrlen(text)-1] != '\n') fprintf(f, "\n"); |
| 660 | } |
| 661 | |
| 662 | if (ff != NULL) |
| 663 | { |
| 664 | while (Ufgets(big_buffer, big_buffer_size, ff) != NULL) |
| 665 | { |
| 666 | if (file_expand) |
| 667 | { |
| 668 | uschar *s = expand_string(big_buffer); |
| 669 | DEBUG(D_transport) |
| 670 | { |
| 671 | if (s == NULL) |
| 672 | debug_printf("error while expanding line from file:\n %s\n %s\n", |
| 673 | big_buffer, expand_string_message); |
| 674 | } |
| 675 | fprintf(f, "%s", (s == NULL)? CS big_buffer : CS s); |
| 676 | } |
| 677 | else fprintf(f, "%s", CS big_buffer); |
| 678 | } |
| 679 | } |
| 680 | |
| 681 | /* Copy the original message if required, observing the return size |
| 682 | limit if we are returning the body. */ |
| 683 | |
| 684 | if (return_message) |
| 685 | { |
| 686 | uschar *rubric = (tblock->headers_only)? |
| 687 | US"------ This is a copy of the message's header lines.\n" |
| 688 | : (tblock->body_only)? |
| 689 | US"------ This is a copy of the body of the message, without the headers.\n" |
| 690 | : |
| 691 | US"------ This is a copy of the message, including all the headers.\n"; |
| 692 | |
| 693 | if (bounce_return_size_limit > 0 && !tblock->headers_only) |
| 694 | { |
| 695 | struct stat statbuf; |
| 696 | int max = (bounce_return_size_limit/DELIVER_IN_BUFFER_SIZE + 1) * |
| 697 | DELIVER_IN_BUFFER_SIZE; |
| 698 | if (fstat(deliver_datafile, &statbuf) == 0 && statbuf.st_size > max) |
| 699 | { |
| 700 | fprintf(f, "\n%s" |
| 701 | "------ The body of the message is " OFF_T_FMT " characters long; only the first\n" |
| 702 | "------ %d or so are included here.\n\n", rubric, statbuf.st_size, |
| 703 | (max/1000)*1000); |
| 704 | } |
| 705 | else fprintf(f, "\n%s\n", rubric); |
| 706 | } |
| 707 | else fprintf(f, "\n%s\n", rubric); |
| 708 | |
| 709 | fflush(f); |
| 710 | transport_count = 0; |
| 711 | transport_write_message(addr, fileno(f), |
| 712 | (tblock->body_only? topt_no_headers : 0) | |
| 713 | (tblock->headers_only? topt_no_body : 0) | |
| 714 | (tblock->return_path_add? topt_add_return_path : 0) | |
| 715 | (tblock->delivery_date_add? topt_add_delivery_date : 0) | |
| 716 | (tblock->envelope_to_add? topt_add_envelope_to : 0), |
| 717 | bounce_return_size_limit, tblock->add_headers, tblock->remove_headers, |
| 718 | NULL, NULL, tblock->rewrite_rules, tblock->rewrite_existflags); |
| 719 | } |
| 720 | |
| 721 | /* End the message and wait for the child process to end; no timeout. */ |
| 722 | |
| 723 | (void)fclose(f); |
| 724 | rc = child_close(pid, 0); |
| 725 | |
| 726 | /* Update the "sent to" log whatever the yield. This errs on the side of |
| 727 | missing out a message rather than risking sending more than one. We either have |
| 728 | cache_fd set to a fixed size, circular buffer file, or dbm_file set to an open |
| 729 | DBM file (or neither, if "once" is not set). */ |
| 730 | |
| 731 | /* Update fixed-size cache file. If cache_time is set, we found a previous |
| 732 | entry; that is the spot into which to put the current time. Otherwise we have |
| 733 | to add a new record; remove the first one in the file if the file is too big. |
| 734 | We always rewrite the entire file in a single write operation. This is |
| 735 | (hopefully) going to be the safest thing because there is no interlocking |
| 736 | between multiple simultaneous deliveries. */ |
| 737 | |
| 738 | if (cache_fd >= 0) |
| 739 | { |
| 740 | uschar *from = cache_buff; |
| 741 | int size = cache_size; |
| 742 | (void)lseek(cache_fd, 0, SEEK_SET); |
| 743 | |
| 744 | if (cache_time == NULL) |
| 745 | { |
| 746 | cache_time = from + size; |
| 747 | memcpy(cache_time + sizeof(time_t), to, add_size - sizeof(time_t)); |
| 748 | size += add_size; |
| 749 | |
| 750 | if (cache_size > 0 && size > ob->once_file_size) |
| 751 | { |
| 752 | from += sizeof(time_t) + Ustrlen(from + sizeof(time_t)) + 1; |
| 753 | size -= (from - cache_buff); |
| 754 | } |
| 755 | } |
| 756 | |
| 757 | memcpy(cache_time, &now, sizeof(time_t)); |
| 758 | (void)write(cache_fd, from, size); |
| 759 | } |
| 760 | |
| 761 | /* Update DBM file */ |
| 762 | |
| 763 | else if (dbm_file != NULL) |
| 764 | { |
| 765 | EXIM_DATUM key_datum, value_datum; |
| 766 | EXIM_DATUM_INIT(key_datum); /* Some DBM libraries need to have */ |
| 767 | EXIM_DATUM_INIT(value_datum); /* cleared datums. */ |
| 768 | EXIM_DATUM_DATA(key_datum) = CS to; |
| 769 | EXIM_DATUM_SIZE(key_datum) = Ustrlen(to) + 1; |
| 770 | |
| 771 | /* Many OS define the datum value, sensibly, as a void *. However, there |
| 772 | are some which still have char *. By casting this address to a char * we |
| 773 | can avoid warning messages from the char * systems. */ |
| 774 | |
| 775 | EXIM_DATUM_DATA(value_datum) = CS (&now); |
| 776 | EXIM_DATUM_SIZE(value_datum) = (int)sizeof(time_t); |
| 777 | EXIM_DBPUT(dbm_file, key_datum, value_datum); |
| 778 | } |
| 779 | |
| 780 | /* If sending failed, defer to try again - but if once is set the next |
| 781 | try will skip, of course. However, if there were no recipients in the |
| 782 | message, we do not fail. */ |
| 783 | |
| 784 | if (rc != 0) |
| 785 | { |
| 786 | if (rc == EXIT_NORECIPIENTS) |
| 787 | { |
| 788 | DEBUG(D_any) debug_printf("%s transport: message contained no recipients\n", |
| 789 | tblock->name); |
| 790 | } |
| 791 | else |
| 792 | { |
| 793 | addr->transport_return = DEFER; |
| 794 | addr->message = string_sprintf("Failed to send message from %s " |
| 795 | "transport (%d)", tblock->name, rc); |
| 796 | goto END_OFF; |
| 797 | } |
| 798 | } |
| 799 | |
| 800 | /* Log the sending of the message if successful and required. If the file |
| 801 | fails to open, it's hard to know what to do. We cannot write to the Exim |
| 802 | log from here, since we may be running under an unprivileged uid. We don't |
| 803 | want to fail the delivery, since the message has been successfully sent. For |
| 804 | the moment, ignore open failures. Write the log entry as a single write() to a |
| 805 | file opened for appending, in order to avoid interleaving of output from |
| 806 | different processes. The log_buffer can be used exactly as for main log |
| 807 | writing. */ |
| 808 | |
| 809 | if (logfile != NULL) |
| 810 | { |
| 811 | int log_fd = Uopen(logfile, O_WRONLY|O_APPEND|O_CREAT, ob->mode); |
| 812 | if (log_fd >= 0) |
| 813 | { |
| 814 | uschar *ptr = log_buffer; |
| 815 | DEBUG(D_transport) debug_printf("logging message details\n"); |
| 816 | sprintf(CS ptr, "%s\n", tod_stamp(tod_log)); |
| 817 | while(*ptr) ptr++; |
| 818 | if (from != NULL) |
| 819 | { |
| 820 | (void)string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer), |
| 821 | " From: %s\n", from); |
| 822 | while(*ptr) ptr++; |
| 823 | } |
| 824 | if (to != NULL) |
| 825 | { |
| 826 | (void)string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer), |
| 827 | " To: %s\n", to); |
| 828 | while(*ptr) ptr++; |
| 829 | } |
| 830 | if (cc != NULL) |
| 831 | { |
| 832 | (void)string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer), |
| 833 | " Cc: %s\n", cc); |
| 834 | while(*ptr) ptr++; |
| 835 | } |
| 836 | if (bcc != NULL) |
| 837 | { |
| 838 | (void)string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer), |
| 839 | " Bcc: %s\n", bcc); |
| 840 | while(*ptr) ptr++; |
| 841 | } |
| 842 | if (subject != NULL) |
| 843 | { |
| 844 | (void)string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer), |
| 845 | " Subject: %s\n", subject); |
| 846 | while(*ptr) ptr++; |
| 847 | } |
| 848 | if (headers != NULL) |
| 849 | { |
| 850 | (void)string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer), |
| 851 | " %s\n", headers); |
| 852 | while(*ptr) ptr++; |
| 853 | } |
| 854 | (void)write(log_fd, log_buffer, ptr - log_buffer); |
| 855 | (void)close(log_fd); |
| 856 | } |
| 857 | else DEBUG(D_transport) debug_printf("Failed to open log file %s for %s " |
| 858 | "transport: %s\n", logfile, tblock->name, strerror(errno)); |
| 859 | } |
| 860 | |
| 861 | END_OFF: |
| 862 | if (dbm_file != NULL) EXIM_DBCLOSE(dbm_file); |
| 863 | if (cache_fd > 0) (void)close(cache_fd); |
| 864 | |
| 865 | DEBUG(D_transport) debug_printf("%s transport succeeded\n", tblock->name); |
| 866 | |
| 867 | return FALSE; |
| 868 | } |
| 869 | |
| 870 | /* End of transport/autoreply.c */ |