| 1 | /************************************************* |
| 2 | * Exim - an Internet mail transport agent * |
| 3 | *************************************************/ |
| 4 | |
| 5 | /* Copyright (c) University of Cambridge 1995 - 2016 */ |
| 6 | /* See the file NOTICE for conditions of use and distribution. */ |
| 7 | |
| 8 | /* Functions for sending messages to sender or to mailmaster. */ |
| 9 | |
| 10 | |
| 11 | #include "exim.h" |
| 12 | |
| 13 | |
| 14 | |
| 15 | /************************************************* |
| 16 | * Write From: line for DSN * |
| 17 | *************************************************/ |
| 18 | |
| 19 | /* This function is called to write the From: line in automatically generated |
| 20 | messages - bounces, warnings, etc. It expands a configuration item in order to |
| 21 | get the text. If the expansion fails, a panic is logged and the default value |
| 22 | for the option is used. |
| 23 | |
| 24 | Argument: the FILE to write to |
| 25 | Returns: nothing |
| 26 | */ |
| 27 | |
| 28 | void |
| 29 | moan_write_from(FILE *f) |
| 30 | { |
| 31 | uschar *s = expand_string(dsn_from); |
| 32 | if (s == NULL) |
| 33 | { |
| 34 | log_write(0, LOG_MAIN|LOG_PANIC, |
| 35 | "Failed to expand dsn_from (using default): %s", expand_string_message); |
| 36 | s = expand_string(US DEFAULT_DSN_FROM); |
| 37 | } |
| 38 | fprintf(f, "From: %s\n", s); |
| 39 | } |
| 40 | |
| 41 | |
| 42 | |
| 43 | /************************************************* |
| 44 | * Send error message * |
| 45 | *************************************************/ |
| 46 | |
| 47 | /* This function sends an error message by opening a pipe to a new process |
| 48 | running Exim, and writing a message to it using the "-t" option. This is not |
| 49 | used for delivery failures, which have their own code for handing failed |
| 50 | addresses. |
| 51 | |
| 52 | Arguments: |
| 53 | recipient addressee for the message |
| 54 | ident identifies the type of error |
| 55 | eblock chain of error_blocks containing data about the error |
| 56 | headers the message's headers |
| 57 | message_file FILE containing the body of the message |
| 58 | firstline contains first line of file, if it was read to check for |
| 59 | "From ", but it turned out not to be |
| 60 | |
| 61 | Returns: TRUE if message successfully sent |
| 62 | */ |
| 63 | |
| 64 | static BOOL |
| 65 | moan_send_message(uschar *recipient, int ident, error_block *eblock, |
| 66 | header_line *headers, FILE *message_file, uschar *firstline) |
| 67 | { |
| 68 | int written = 0; |
| 69 | int fd; |
| 70 | int status; |
| 71 | int count = 0; |
| 72 | int size_limit = bounce_return_size_limit; |
| 73 | FILE *f; |
| 74 | int pid = child_open_exim(&fd); |
| 75 | |
| 76 | /* Creation of child failed */ |
| 77 | |
| 78 | if (pid < 0) |
| 79 | { |
| 80 | DEBUG(D_any) debug_printf("Failed to create child to send message: %s\n", |
| 81 | strerror(errno)); |
| 82 | return FALSE; |
| 83 | } |
| 84 | else DEBUG(D_any) debug_printf("Child process %d for sending message\n", pid); |
| 85 | |
| 86 | /* Creation of child succeeded */ |
| 87 | |
| 88 | f = fdopen(fd, "wb"); |
| 89 | if (errors_reply_to) fprintf(f, "Reply-To: %s\n", errors_reply_to); |
| 90 | fprintf(f, "Auto-Submitted: auto-replied\n"); |
| 91 | moan_write_from(f); |
| 92 | fprintf(f, "To: %s\n", recipient); |
| 93 | |
| 94 | switch(ident) |
| 95 | { |
| 96 | case ERRMESS_BADARGADDRESS: |
| 97 | fprintf(f, |
| 98 | "Subject: Mail failure - malformed recipient address\n\n"); |
| 99 | fprintf(f, |
| 100 | "A message that you sent contained a recipient address that was incorrectly\n" |
| 101 | "constructed:\n\n"); |
| 102 | fprintf(f, " %s %s\n", eblock->text1, eblock->text2); |
| 103 | count = Ustrlen(eblock->text1); |
| 104 | if (count > 0 && eblock->text1[count-1] == '.') |
| 105 | fprintf(f, |
| 106 | "\nRecipient addresses must not end with a '.' character.\n"); |
| 107 | fprintf(f, |
| 108 | "\nThe message has not been delivered to any recipients.\n"); |
| 109 | break; |
| 110 | |
| 111 | case ERRMESS_BADNOADDRESS: |
| 112 | case ERRMESS_BADADDRESS: |
| 113 | fprintf(f, |
| 114 | "Subject: Mail failure - malformed recipient address\n\n"); |
| 115 | fprintf(f, |
| 116 | "A message that you sent contained one or more recipient addresses that were\n" |
| 117 | "incorrectly constructed:\n\n"); |
| 118 | |
| 119 | while (eblock != NULL) |
| 120 | { |
| 121 | fprintf(f, " %s: %s\n", eblock->text1, eblock->text2); |
| 122 | count++; |
| 123 | eblock = eblock->next; |
| 124 | } |
| 125 | |
| 126 | fprintf(f, (count == 1)? "\nThis address has been ignored. " : |
| 127 | "\nThese addresses have been ignored. "); |
| 128 | |
| 129 | fprintf(f, (ident == ERRMESS_BADADDRESS)? |
| 130 | "The other addresses in the message were\n" |
| 131 | "syntactically valid and have been passed on for an attempt at delivery.\n" : |
| 132 | |
| 133 | "There were no other addresses in your\n" |
| 134 | "message, and so no attempt at delivery was possible.\n"); |
| 135 | break; |
| 136 | |
| 137 | case ERRMESS_IGADDRESS: |
| 138 | fprintf(f, "Subject: Mail failure - no recipient addresses\n\n"); |
| 139 | fprintf(f, |
| 140 | "A message that you sent using the -t command line option contained no\n" |
| 141 | "addresses that were not also on the command line, and were therefore\n" |
| 142 | "suppressed. This left no recipient addresses, and so no delivery could\n" |
| 143 | "be attempted.\n"); |
| 144 | break; |
| 145 | |
| 146 | case ERRMESS_NOADDRESS: |
| 147 | fprintf(f, "Subject: Mail failure - no recipient addresses\n\n"); |
| 148 | fprintf(f, |
| 149 | "A message that you sent contained no recipient addresses, and therefore no\n" |
| 150 | "delivery could be attempted.\n"); |
| 151 | break; |
| 152 | |
| 153 | case ERRMESS_IOERR: |
| 154 | fprintf(f, "Subject: Mail failure - system failure\n\n"); |
| 155 | fprintf(f, |
| 156 | "A system failure was encountered while processing a message that you sent,\n" |
| 157 | "so it has not been possible to deliver it. The error was:\n\n%s\n", |
| 158 | eblock->text1); |
| 159 | break; |
| 160 | |
| 161 | case ERRMESS_VLONGHEADER: |
| 162 | fprintf(f, "Subject: Mail failure - overlong header section\n\n"); |
| 163 | fprintf(f, |
| 164 | "A message that you sent contained a header section that was excessively\n" |
| 165 | "long and could not be handled by the mail transmission software. The\n" |
| 166 | "message has not been delivered to any recipients.\n"); |
| 167 | break; |
| 168 | |
| 169 | case ERRMESS_VLONGHDRLINE: |
| 170 | fprintf(f, "Subject: Mail failure - overlong header line\n\n"); |
| 171 | fprintf(f, |
| 172 | "A message that you sent contained a header line that was excessively\n" |
| 173 | "long and could not be handled by the mail transmission software. The\n" |
| 174 | "message has not been delivered to any recipients.\n"); |
| 175 | break; |
| 176 | |
| 177 | case ERRMESS_TOOBIG: |
| 178 | fprintf(f, "Subject: Mail failure - message too big\n\n"); |
| 179 | fprintf(f, |
| 180 | "A message that you sent was longer than the maximum size allowed on this\n" |
| 181 | "system. It was not delivered to any recipients.\n"); |
| 182 | break; |
| 183 | |
| 184 | case ERRMESS_TOOMANYRECIP: |
| 185 | fprintf(f, "Subject: Mail failure - too many recipients\n\n"); |
| 186 | fprintf(f, |
| 187 | "A message that you sent contained more recipients than allowed on this\n" |
| 188 | "system. It was not delivered to any recipients.\n"); |
| 189 | break; |
| 190 | |
| 191 | case ERRMESS_LOCAL_SCAN: |
| 192 | case ERRMESS_LOCAL_ACL: |
| 193 | fprintf(f, "Subject: Mail failure - rejected by local scanning code\n\n"); |
| 194 | fprintf(f, |
| 195 | "A message that you sent was rejected by the local scanning code that\n" |
| 196 | "checks incoming messages on this system."); |
| 197 | if (eblock->text1) |
| 198 | fprintf(f, " The following error was given:\n\n %s", eblock->text1); |
| 199 | fprintf(f, "\n"); |
| 200 | break; |
| 201 | |
| 202 | #ifdef EXPERIMENTAL_DMARC |
| 203 | case ERRMESS_DMARC_FORENSIC: |
| 204 | bounce_return_message = TRUE; |
| 205 | bounce_return_body = FALSE; |
| 206 | fprintf(f, |
| 207 | "Subject: DMARC Forensic Report for %s from IP %s\n\n", |
| 208 | ((eblock == NULL) ? US"Unknown" : eblock->text2), |
| 209 | sender_host_address); |
| 210 | fprintf(f, |
| 211 | "A message claiming to be from you has failed the published DMARC\n" |
| 212 | "policy for your domain.\n\n"); |
| 213 | while (eblock != NULL) |
| 214 | { |
| 215 | fprintf(f, " %s: %s\n", eblock->text1, eblock->text2); |
| 216 | count++; |
| 217 | eblock = eblock->next; |
| 218 | } |
| 219 | break; |
| 220 | #endif |
| 221 | |
| 222 | default: |
| 223 | fprintf(f, "Subject: Mail failure\n\n"); |
| 224 | fprintf(f, |
| 225 | "A message that you sent has caused the error routine to be entered with\n" |
| 226 | "an unknown error number (%d).\n", ident); |
| 227 | break; |
| 228 | } |
| 229 | |
| 230 | /* Now, if configured, copy the message; first the headers and then the rest of |
| 231 | the input if available, up to the configured limit, if the option for including |
| 232 | message bodies in bounces is set. */ |
| 233 | |
| 234 | if (bounce_return_message) |
| 235 | { |
| 236 | if (bounce_return_body) |
| 237 | { |
| 238 | fprintf(f, "\n" |
| 239 | "------ This is a copy of your message, including all the headers."); |
| 240 | if (size_limit == 0 || size_limit > thismessage_size_limit) |
| 241 | size_limit = thismessage_size_limit; |
| 242 | if (size_limit > 0 && size_limit < message_size) |
| 243 | { |
| 244 | int x = size_limit; |
| 245 | uschar *k = US""; |
| 246 | if ((x & 1023) == 0) |
| 247 | { |
| 248 | k = US"K"; |
| 249 | x >>= 10; |
| 250 | } |
| 251 | fprintf(f, "\n" |
| 252 | "------ No more than %d%s characters of the body are included.\n\n", |
| 253 | x, k); |
| 254 | } |
| 255 | else fprintf(f, " ------\n\n"); |
| 256 | } |
| 257 | else |
| 258 | { |
| 259 | fprintf(f, "\n" |
| 260 | "------ This is a copy of the headers that were received before the " |
| 261 | "error\n was detected.\n\n"); |
| 262 | } |
| 263 | |
| 264 | /* If the error occurred before the Received: header was created, its text |
| 265 | field will still be NULL; just omit such a header line. */ |
| 266 | |
| 267 | while (headers) |
| 268 | { |
| 269 | if (headers->text != NULL) fprintf(f, "%s", CS headers->text); |
| 270 | headers = headers->next; |
| 271 | } |
| 272 | |
| 273 | if (ident != ERRMESS_VLONGHEADER && ident != ERRMESS_VLONGHDRLINE) |
| 274 | fputc('\n', f); |
| 275 | |
| 276 | /* After early detection of an error, the message file may be STDIN, |
| 277 | in which case we might have to terminate on a line containing just "." |
| 278 | as well as on EOF. We may already have the first line in memory. */ |
| 279 | |
| 280 | if (bounce_return_body && message_file) |
| 281 | { |
| 282 | BOOL enddot = dot_ends && message_file == stdin; |
| 283 | uschar * buf = store_get(bounce_return_linesize_limit+2); |
| 284 | |
| 285 | if (firstline) fprintf(f, "%s", CS firstline); |
| 286 | |
| 287 | while (fgets(CS buf, bounce_return_linesize_limit+2, message_file)) |
| 288 | { |
| 289 | int len; |
| 290 | |
| 291 | if (enddot && *buf == '.' && buf[1] == '\n') |
| 292 | { |
| 293 | fputc('.', f); |
| 294 | break; |
| 295 | } |
| 296 | |
| 297 | len = Ustrlen(buf); |
| 298 | if (buf[len-1] != '\n') |
| 299 | { /* eat rest of partial line */ |
| 300 | int ch; |
| 301 | while ((ch = fgetc(message_file)) != EOF && ch != '\n') ; |
| 302 | } |
| 303 | |
| 304 | if (size_limit > 0 && len > size_limit - written) |
| 305 | { |
| 306 | buf[size_limit - written] = '\0'; |
| 307 | fputs(CS buf, f); |
| 308 | break; |
| 309 | } |
| 310 | |
| 311 | fputs(CS buf, f); |
| 312 | } |
| 313 | } |
| 314 | #ifdef EXPERIMENTAL_DMARC |
| 315 | /* Overkill, but use exact test in case future code gets inserted */ |
| 316 | else if (bounce_return_body && message_file == NULL) |
| 317 | { |
| 318 | /*XXX limit line length here? */ |
| 319 | /* This doesn't print newlines, disable until can parse and fix |
| 320 | * output to be legible. */ |
| 321 | fprintf(f, "%s", expand_string(US"$message_body")); |
| 322 | } |
| 323 | #endif |
| 324 | } |
| 325 | /* Close the file, which should send an EOF to the child process |
| 326 | that is receiving the message. Wait for it to finish, without a timeout. */ |
| 327 | |
| 328 | (void)fclose(f); |
| 329 | status = child_close(pid, 0); /* Waits for child to close */ |
| 330 | if (status != 0) |
| 331 | { |
| 332 | uschar *msg = US"Child mail process returned status"; |
| 333 | if (status == -257) |
| 334 | log_write(0, LOG_MAIN, "%s %d: errno=%d: %s", msg, status, errno, |
| 335 | strerror(errno)); |
| 336 | else |
| 337 | log_write(0, LOG_MAIN, "%s %d", msg, status); |
| 338 | return FALSE; |
| 339 | } |
| 340 | |
| 341 | return TRUE; |
| 342 | } |
| 343 | |
| 344 | |
| 345 | |
| 346 | /************************************************* |
| 347 | * Send message to sender * |
| 348 | *************************************************/ |
| 349 | |
| 350 | /* This function is called when errors are detected during the receipt of a |
| 351 | message. Delivery failures are handled separately in deliver.c. |
| 352 | |
| 353 | If there is a valid sender_address, and the failing message is not a local |
| 354 | error message, then this function calls moan_send_message to send a message to |
| 355 | that person. If the sender's address is null, then an error has occurred with a |
| 356 | message that was generated by a mailer daemon. All we can do is to write |
| 357 | information to log files. The same action is taken if local_error_message is |
| 358 | set - this can happen for non null-senders in certain configurations where exim |
| 359 | doesn't run setuid root. |
| 360 | |
| 361 | Arguments: |
| 362 | ident identifies the particular error |
| 363 | eblock chain of error_blocks containing data about the error |
| 364 | headers message's headers (chain) |
| 365 | message_file a FILE where the body of the message can be read |
| 366 | check_sender if TRUE, read the first line of the file for a possible |
| 367 | "From " sender (if a trusted caller) |
| 368 | |
| 369 | Returns: FALSE if there is no sender_address to send to; |
| 370 | else the return from moan_send_message() |
| 371 | */ |
| 372 | |
| 373 | BOOL |
| 374 | moan_to_sender(int ident, error_block *eblock, header_line *headers, |
| 375 | FILE *message_file, BOOL check_sender) |
| 376 | { |
| 377 | uschar *firstline = NULL; |
| 378 | uschar *msg = US"Error while reading message with no usable sender address"; |
| 379 | |
| 380 | if (message_reference) |
| 381 | msg = string_sprintf("%s (R=%s)", msg, message_reference); |
| 382 | |
| 383 | /* Find the sender from a From line if permitted and possible */ |
| 384 | |
| 385 | if (check_sender && message_file && trusted_caller && |
| 386 | Ufgets(big_buffer, BIG_BUFFER_SIZE, message_file) != NULL) |
| 387 | { |
| 388 | uschar *new_sender = NULL; |
| 389 | if (regex_match_and_setup(regex_From, big_buffer, 0, -1)) |
| 390 | new_sender = expand_string(uucp_from_sender); |
| 391 | if (new_sender) sender_address = new_sender; |
| 392 | else firstline = big_buffer; |
| 393 | } |
| 394 | |
| 395 | /* If viable sender address, send a message */ |
| 396 | |
| 397 | if (sender_address && sender_address[0] && !local_error_message) |
| 398 | return moan_send_message(sender_address, ident, eblock, headers, |
| 399 | message_file, firstline); |
| 400 | |
| 401 | /* Otherwise, we can only log */ |
| 402 | |
| 403 | switch(ident) |
| 404 | { |
| 405 | case ERRMESS_BADARGADDRESS: |
| 406 | case ERRMESS_BADNOADDRESS: |
| 407 | case ERRMESS_BADADDRESS: |
| 408 | log_write(0, LOG_MAIN, "%s: at least one malformed recipient address: " |
| 409 | "%s - %s", msg, eblock->text1, eblock->text2); |
| 410 | break; |
| 411 | |
| 412 | case ERRMESS_IGADDRESS: |
| 413 | case ERRMESS_NOADDRESS: |
| 414 | log_write(0, LOG_MAIN, "%s: no recipient addresses", msg); |
| 415 | break; |
| 416 | |
| 417 | /* This error has already been logged. */ |
| 418 | case ERRMESS_IOERR: |
| 419 | break; |
| 420 | |
| 421 | case ERRMESS_VLONGHEADER: |
| 422 | log_write(0, LOG_MAIN, "%s: excessively long message header section read " |
| 423 | "(more than %d characters)", msg, header_maxsize); |
| 424 | break; |
| 425 | |
| 426 | case ERRMESS_VLONGHDRLINE: |
| 427 | log_write(0, LOG_MAIN, "%s: excessively long message header line read " |
| 428 | "(more than %d characters)", msg, header_line_maxsize); |
| 429 | break; |
| 430 | |
| 431 | case ERRMESS_TOOBIG: |
| 432 | log_write(0, LOG_MAIN, "%s: message too big (limit set to %d)", msg, |
| 433 | thismessage_size_limit); |
| 434 | break; |
| 435 | |
| 436 | case ERRMESS_TOOMANYRECIP: |
| 437 | log_write(0, LOG_MAIN, "%s: too many recipients (max set to %d)", msg, |
| 438 | recipients_max); |
| 439 | break; |
| 440 | |
| 441 | case ERRMESS_LOCAL_SCAN: |
| 442 | log_write(0, LOG_MAIN, "%s: rejected by local_scan: %s", msg, eblock->text1); |
| 443 | break; |
| 444 | |
| 445 | case ERRMESS_LOCAL_ACL: |
| 446 | log_write(0, LOG_MAIN, "%s: rejected by non-SMTP ACL: %s", msg, eblock->text1); |
| 447 | break; |
| 448 | |
| 449 | default: |
| 450 | log_write(0, LOG_MAIN|LOG_PANIC, "%s: unknown error number %d", msg, |
| 451 | ident); |
| 452 | break; |
| 453 | } |
| 454 | |
| 455 | return FALSE; |
| 456 | } |
| 457 | |
| 458 | |
| 459 | |
| 460 | /************************************************* |
| 461 | * Send message to someone * |
| 462 | *************************************************/ |
| 463 | |
| 464 | /* This is called when exim is configured to tell someone (often the |
| 465 | mailmaster) about some incident. |
| 466 | |
| 467 | Arguments: |
| 468 | who address to send mail to |
| 469 | addr chain of deferred addresses whose details are to be included |
| 470 | subject subject text for the message |
| 471 | format a printf() format for the body of the message |
| 472 | ... arguments for the format |
| 473 | |
| 474 | Returns: nothing |
| 475 | */ |
| 476 | |
| 477 | void |
| 478 | moan_tell_someone(uschar *who, address_item *addr, |
| 479 | const uschar *subject, const char *format, ...) |
| 480 | { |
| 481 | FILE *f; |
| 482 | va_list ap; |
| 483 | int fd; |
| 484 | int pid = child_open_exim(&fd); |
| 485 | |
| 486 | if (pid < 0) |
| 487 | { |
| 488 | DEBUG(D_any) debug_printf("Failed to create child to send message: %s\n", |
| 489 | strerror(errno)); |
| 490 | return; |
| 491 | } |
| 492 | |
| 493 | f = fdopen(fd, "wb"); |
| 494 | fprintf(f, "Auto-Submitted: auto-replied\n"); |
| 495 | moan_write_from(f); |
| 496 | fprintf(f, "To: %s\n", who); |
| 497 | fprintf(f, "Subject: %s\n\n", subject); |
| 498 | va_start(ap, format); |
| 499 | vfprintf(f, format, ap); |
| 500 | va_end(ap); |
| 501 | |
| 502 | if (addr != NULL) |
| 503 | { |
| 504 | fprintf(f, "\nThe following address(es) have yet to be delivered:\n"); |
| 505 | for (; addr != NULL; addr = addr->next) |
| 506 | { |
| 507 | uschar *parent = (addr->parent == NULL)? NULL : addr->parent->address; |
| 508 | fprintf(f, " %s", addr->address); |
| 509 | if (parent != NULL) fprintf(f, " <%s>", parent); |
| 510 | if (addr->basic_errno > 0) fprintf(f, ": %s", strerror(addr->basic_errno)); |
| 511 | if (addr->message != NULL) fprintf(f, ": %s", addr->message); |
| 512 | fprintf(f, "\n"); |
| 513 | } |
| 514 | } |
| 515 | |
| 516 | (void)fclose(f); |
| 517 | child_close(pid, 0); /* Waits for child to close; no timeout */ |
| 518 | } |
| 519 | |
| 520 | |
| 521 | |
| 522 | /************************************************* |
| 523 | * Handle SMTP batch error * |
| 524 | *************************************************/ |
| 525 | |
| 526 | /* This is called when something goes wrong in batched (-bS) SMTP input. |
| 527 | Information is written to stdout and/or stderr, and Exim exits with a non-zero |
| 528 | completion code. BSMTP is almost always called by some other program, so it is |
| 529 | up to that program to interpret the return code and do something with the error |
| 530 | information, and also to preserve the batch input file for human analysis. |
| 531 | |
| 532 | Formerly, Exim used to attempt to continue after some errors, but this strategy |
| 533 | has been abandoned as it can lead to loss of messages. |
| 534 | |
| 535 | Arguments: |
| 536 | cmd_buffer the command causing the error, or NULL |
| 537 | format a printf() format |
| 538 | ... arguments for the format |
| 539 | |
| 540 | Returns: does not return; exits from the program |
| 541 | exit code = 1 if some messages were accepted |
| 542 | exit code = 2 if no messages were accepted |
| 543 | */ |
| 544 | |
| 545 | void |
| 546 | moan_smtp_batch(uschar *cmd_buffer, const char *format, ...) |
| 547 | { |
| 548 | va_list ap; |
| 549 | int yield = (receive_messagecount > 0)? 1 : 2; |
| 550 | |
| 551 | DEBUG(D_any) debug_printf("Handling error in batched SMTP input\n"); |
| 552 | |
| 553 | /* On stdout, write stuff that a program could parse fairly easily. */ |
| 554 | |
| 555 | va_start(ap, format); |
| 556 | vfprintf(stdout, format, ap); |
| 557 | va_end(ap); |
| 558 | |
| 559 | fprintf(stdout, "\nTransaction started in line %d\n", |
| 560 | bsmtp_transaction_linecount); |
| 561 | fprintf(stdout, "Error detected in line %d\n", receive_linecount); |
| 562 | if (cmd_buffer != NULL) fprintf(stdout, "%s\n", cmd_buffer); |
| 563 | |
| 564 | /* On stderr, write stuff for human consumption */ |
| 565 | |
| 566 | fprintf(stderr, |
| 567 | "An error was detected while processing a file of BSMTP input.\n" |
| 568 | "The error message was:\n\n "); |
| 569 | |
| 570 | va_start(ap, format); |
| 571 | vfprintf(stderr, format, ap); |
| 572 | va_end(ap); |
| 573 | |
| 574 | fprintf(stderr, |
| 575 | "\n\nThe SMTP transaction started in line %d.\n" |
| 576 | "The error was detected in line %d.\n", |
| 577 | bsmtp_transaction_linecount, receive_linecount); |
| 578 | |
| 579 | if (cmd_buffer != NULL) |
| 580 | { |
| 581 | fprintf(stderr, "The SMTP command at fault was:\n\n %s\n\n", |
| 582 | cmd_buffer); |
| 583 | } |
| 584 | |
| 585 | fprintf(stderr, "%d previous message%s successfully processed.\n", |
| 586 | receive_messagecount, (receive_messagecount == 1)? " was" : "s were"); |
| 587 | |
| 588 | fprintf(stderr, "The rest of the batch was abandoned.\n"); |
| 589 | |
| 590 | exim_exit(yield); |
| 591 | } |
| 592 | |
| 593 | |
| 594 | |
| 595 | |
| 596 | /************************************************* |
| 597 | * Check for error copies * |
| 598 | *************************************************/ |
| 599 | |
| 600 | /* This function is passed the recipient of an error message, and must check |
| 601 | the error_copies string to see whether there is an additional recipient list to |
| 602 | which errors for this recipient must be bcc'd. The incoming recipient is always |
| 603 | fully qualified. |
| 604 | |
| 605 | Argument: recipient address |
| 606 | Returns: additional recipient list or NULL |
| 607 | */ |
| 608 | |
| 609 | uschar * |
| 610 | moan_check_errorcopy(uschar *recipient) |
| 611 | { |
| 612 | uschar *item, *localpart, *domain; |
| 613 | const uschar *listptr = errors_copy; |
| 614 | uschar *yield = NULL; |
| 615 | uschar buffer[256]; |
| 616 | int sep = 0; |
| 617 | int llen; |
| 618 | |
| 619 | if (errors_copy == NULL) return NULL; |
| 620 | |
| 621 | /* Set up pointer to the local part and domain, and compute the |
| 622 | length of the local part. */ |
| 623 | |
| 624 | localpart = recipient; |
| 625 | domain = Ustrrchr(recipient, '@'); |
| 626 | if (domain == NULL) return NULL; /* should not occur, but avoid crash */ |
| 627 | llen = domain++ - recipient; |
| 628 | |
| 629 | /* Scan through the configured items */ |
| 630 | |
| 631 | while ((item = string_nextinlist(&listptr, &sep, buffer, sizeof(buffer))) |
| 632 | != NULL) |
| 633 | { |
| 634 | const uschar *newaddress = item; |
| 635 | const uschar *pattern = string_dequote(&newaddress); |
| 636 | |
| 637 | /* If no new address found, just skip this item. */ |
| 638 | |
| 639 | while (isspace(*newaddress)) newaddress++; |
| 640 | if (*newaddress == 0) continue; |
| 641 | |
| 642 | /* We now have an item to match as an address in item, and the additional |
| 643 | address in newaddress. If the pattern matches, expand the new address string |
| 644 | and return it. During expansion, make local part and domain available for |
| 645 | insertion. This requires a copy to be made; we can't just temporarily |
| 646 | terminate it, as the whole address is required for $0. */ |
| 647 | |
| 648 | if (match_address_list(recipient, TRUE, TRUE, &pattern, NULL, 0, UCHAR_MAX+1, |
| 649 | NULL) == OK) |
| 650 | { |
| 651 | deliver_localpart = string_copyn(localpart, llen); |
| 652 | deliver_domain = domain; |
| 653 | yield = expand_string_copy(newaddress); |
| 654 | deliver_domain = deliver_localpart = NULL; |
| 655 | if (yield == NULL) |
| 656 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand %s when processing " |
| 657 | "errors_copy: %s", newaddress, expand_string_message); |
| 658 | break; |
| 659 | } |
| 660 | } |
| 661 | |
| 662 | DEBUG(D_any) debug_printf("errors_copy check returned %s\n", |
| 663 | (yield == NULL)? US"NULL" : yield); |
| 664 | |
| 665 | expand_nmax = -1; |
| 666 | return yield; |
| 667 | } |
| 668 | |
| 669 | |
| 670 | |
| 671 | /************************************************ |
| 672 | * Handle skipped syntax errors * |
| 673 | ************************************************/ |
| 674 | |
| 675 | /* This function is called by the redirect router when it has skipped over one |
| 676 | or more syntax errors in the list of addresses. If there is an address to mail |
| 677 | to, send a message, and always write the information to the log. In the case of |
| 678 | a filter file, a "syntax error" might actually be something else, such as the |
| 679 | inability to open a log file. Thus, the wording of the error message is |
| 680 | general. |
| 681 | |
| 682 | Arguments: |
| 683 | rname the router name |
| 684 | eblock chain of error blocks |
| 685 | syntax_errors_to address to send mail to, or NULL |
| 686 | some TRUE if some addresses were generated; FALSE if none were |
| 687 | custom custom message text |
| 688 | |
| 689 | Returns: FALSE if string expansion failed; TRUE otherwise |
| 690 | */ |
| 691 | |
| 692 | BOOL |
| 693 | moan_skipped_syntax_errors(uschar *rname, error_block *eblock, |
| 694 | uschar *syntax_errors_to, BOOL some, uschar *custom) |
| 695 | { |
| 696 | int pid, fd; |
| 697 | uschar *s, *t; |
| 698 | FILE *f; |
| 699 | error_block *e; |
| 700 | |
| 701 | for (e = eblock; e != NULL; e = e->next) |
| 702 | { |
| 703 | if (e->text2 != NULL) |
| 704 | log_write(0, LOG_MAIN, "%s router: skipped error: %s in \"%s\"", |
| 705 | rname, e->text1, e->text2); |
| 706 | else |
| 707 | log_write(0, LOG_MAIN, "%s router: skipped error: %s", rname, |
| 708 | e->text1); |
| 709 | } |
| 710 | |
| 711 | if (syntax_errors_to == NULL) return TRUE; |
| 712 | |
| 713 | s = expand_string(syntax_errors_to); |
| 714 | if (s == NULL) |
| 715 | { |
| 716 | log_write(0, LOG_MAIN, "%s router failed to expand %s: %s", rname, |
| 717 | syntax_errors_to, expand_string_message); |
| 718 | return FALSE; |
| 719 | } |
| 720 | |
| 721 | /* If we can't create a process to send the message, just forget about |
| 722 | it. */ |
| 723 | |
| 724 | pid = child_open_exim(&fd); |
| 725 | |
| 726 | if (pid < 0) |
| 727 | { |
| 728 | DEBUG(D_any) debug_printf("Failed to create child to send message: %s\n", |
| 729 | strerror(errno)); |
| 730 | return TRUE; |
| 731 | } |
| 732 | |
| 733 | f = fdopen(fd, "wb"); |
| 734 | fprintf(f, "Auto-Submitted: auto-replied\n"); |
| 735 | moan_write_from(f); |
| 736 | fprintf(f, "To: %s\n", s); |
| 737 | fprintf(f, "Subject: error(s) in forwarding or filtering\n\n"); |
| 738 | |
| 739 | if (custom != NULL) |
| 740 | { |
| 741 | t = expand_string(custom); |
| 742 | if (t == NULL) |
| 743 | { |
| 744 | log_write(0, LOG_MAIN, "%s router failed to expand %s: %s", rname, |
| 745 | custom, expand_string_message); |
| 746 | return FALSE; |
| 747 | } |
| 748 | fprintf(f, "%s\n\n", t); |
| 749 | } |
| 750 | |
| 751 | fprintf(f, "The %s router encountered the following error(s):\n\n", |
| 752 | rname); |
| 753 | |
| 754 | for (e = eblock; e != NULL; e = e->next) |
| 755 | { |
| 756 | fprintf(f, " %s", e->text1); |
| 757 | if (e->text2 != NULL) |
| 758 | fprintf(f, " in the address\n \"%s\"", e->text2); |
| 759 | fprintf(f, "\n\n"); |
| 760 | } |
| 761 | |
| 762 | if (some) |
| 763 | fprintf(f, "Other addresses were processed normally.\n"); |
| 764 | else |
| 765 | fprintf(f, "No valid addresses were generated.\n"); |
| 766 | |
| 767 | (void)fclose(f); |
| 768 | child_close(pid, 0); /* Waits for child to close; no timeout */ |
| 769 | |
| 770 | return TRUE; |
| 771 | } |
| 772 | |
| 773 | /* End of moan.c */ |