Commit | Line | Data |
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059ec3d9 PH |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
2331cfe7 | 5 | /* Copyright (c) University of Cambridge 1995 - 2014 */ |
059ec3d9 PH |
6 | /* See the file NOTICE for conditions of use and distribution. */ |
7 | ||
8 | /* Code for receiving a message and setting up spool files. */ | |
9 | ||
059ec3d9 PH |
10 | #include "exim.h" |
11 | ||
6a8f9482 TK |
12 | #ifdef EXPERIMENTAL_DCC |
13 | extern int dcc_ok; | |
14 | #endif | |
15 | ||
4840604e TL |
16 | #ifdef EXPERIMENTAL_DMARC |
17 | #include "dmarc.h" | |
18 | #endif /* EXPERIMENTAL_DMARC */ | |
19 | ||
059ec3d9 PH |
20 | /************************************************* |
21 | * Local static variables * | |
22 | *************************************************/ | |
23 | ||
24 | static FILE *data_file = NULL; | |
25 | static int data_fd = -1; | |
26 | static uschar spool_name[256]; | |
27 | ||
28 | ||
29 | ||
30 | /************************************************* | |
31 | * Non-SMTP character reading functions * | |
32 | *************************************************/ | |
33 | ||
34 | /* These are the default functions that are set up in the variables such as | |
35 | receive_getc initially. They just call the standard functions, passing stdin as | |
36 | the file. (When SMTP input is occurring, different functions are used by | |
37 | changing the pointer variables.) */ | |
38 | ||
39 | int | |
40 | stdin_getc(void) | |
41 | { | |
42 | return getc(stdin); | |
43 | } | |
44 | ||
45 | int | |
46 | stdin_ungetc(int c) | |
47 | { | |
48 | return ungetc(c, stdin); | |
49 | } | |
50 | ||
51 | int | |
52 | stdin_feof(void) | |
53 | { | |
54 | return feof(stdin); | |
55 | } | |
56 | ||
57 | int | |
58 | stdin_ferror(void) | |
59 | { | |
60 | return ferror(stdin); | |
61 | } | |
62 | ||
63 | ||
64 | ||
65 | ||
66 | /************************************************* | |
67 | * Check that a set sender is allowed * | |
68 | *************************************************/ | |
69 | ||
70 | /* This function is called when a local caller sets an explicit sender address. | |
71 | It checks whether this is permitted, which it is for trusted callers. | |
72 | Otherwise, it must match the pattern(s) in untrusted_set_sender. | |
73 | ||
74 | Arguments: the proposed sender address | |
75 | Returns: TRUE for a trusted caller | |
76 | TRUE if the address has been set, untrusted_set_sender has been | |
77 | set, and the address matches something in the list | |
78 | FALSE otherwise | |
79 | */ | |
80 | ||
81 | BOOL | |
82 | receive_check_set_sender(uschar *newsender) | |
83 | { | |
84 | uschar *qnewsender; | |
85 | if (trusted_caller) return TRUE; | |
86 | if (newsender == NULL || untrusted_set_sender == NULL) return FALSE; | |
87 | qnewsender = (Ustrchr(newsender, '@') != NULL)? | |
88 | newsender : string_sprintf("%s@%s", newsender, qualify_domain_sender); | |
89 | return | |
90 | match_address_list(qnewsender, TRUE, TRUE, &untrusted_set_sender, NULL, -1, | |
91 | 0, NULL) == OK; | |
92 | } | |
93 | ||
94 | ||
95 | ||
96 | ||
97 | /************************************************* | |
5cb8cbc6 | 98 | * Read space info for a partition * |
059ec3d9 PH |
99 | *************************************************/ |
100 | ||
8e669ac1 PH |
101 | /* This function is called by receive_check_fs() below, and also by string |
102 | expansion for variables such as $spool_space. The field names for the statvfs | |
5cb8cbc6 PH |
103 | structure are macros, because not all OS have F_FAVAIL and it seems tidier to |
104 | have macros for F_BAVAIL and F_FILES as well. Some kinds of file system do not | |
105 | have inodes, and they return -1 for the number available. | |
059ec3d9 | 106 | |
5cb8cbc6 PH |
107 | Later: It turns out that some file systems that do not have the concept of |
108 | inodes return 0 rather than -1. Such systems should also return 0 for the total | |
8e669ac1 | 109 | number of inodes, so we require that to be greater than zero before returning |
5cb8cbc6 | 110 | an inode count. |
059ec3d9 | 111 | |
5cb8cbc6 PH |
112 | Arguments: |
113 | isspool TRUE for spool partition, FALSE for log partition | |
114 | inodeptr address of int to receive inode count; -1 if there isn't one | |
8e669ac1 | 115 | |
5cb8cbc6 | 116 | Returns: available on-root space, in kilobytes |
8e669ac1 PH |
117 | -1 for log partition if there isn't one |
118 | ||
119 | All values are -1 if the STATFS functions are not available. | |
059ec3d9 PH |
120 | */ |
121 | ||
8e669ac1 | 122 | int |
5cb8cbc6 | 123 | receive_statvfs(BOOL isspool, int *inodeptr) |
059ec3d9 PH |
124 | { |
125 | #ifdef HAVE_STATFS | |
059ec3d9 | 126 | struct STATVFS statbuf; |
5cb8cbc6 PH |
127 | uschar *path; |
128 | uschar *name; | |
129 | uschar buffer[1024]; | |
059ec3d9 | 130 | |
5cb8cbc6 | 131 | /* The spool directory must always exist. */ |
059ec3d9 | 132 | |
5cb8cbc6 | 133 | if (isspool) |
059ec3d9 | 134 | { |
8e669ac1 PH |
135 | path = spool_directory; |
136 | name = US"spool"; | |
137 | } | |
138 | ||
059ec3d9 PH |
139 | /* Need to cut down the log file path to the directory, and to ignore any |
140 | appearance of "syslog" in it. */ | |
141 | ||
5cb8cbc6 | 142 | else |
059ec3d9 | 143 | { |
059ec3d9 | 144 | int sep = ':'; /* Not variable - outside scripts use */ |
059ec3d9 | 145 | uschar *p = log_file_path; |
8e669ac1 | 146 | name = US"log"; |
059ec3d9 PH |
147 | |
148 | /* An empty log_file_path means "use the default". This is the same as an | |
149 | empty item in a list. */ | |
150 | ||
151 | if (*p == 0) p = US":"; | |
152 | while ((path = string_nextinlist(&p, &sep, buffer, sizeof(buffer))) != NULL) | |
153 | { | |
154 | if (Ustrcmp(path, "syslog") != 0) break; | |
155 | } | |
156 | ||
5cb8cbc6 PH |
157 | if (path == NULL) /* No log files */ |
158 | { | |
8e669ac1 PH |
159 | *inodeptr = -1; |
160 | return -1; | |
161 | } | |
059ec3d9 | 162 | |
8e669ac1 PH |
163 | /* An empty string means use the default, which is in the spool directory. |
164 | But don't just use the spool directory, as it is possible that the log | |
5cb8cbc6 | 165 | subdirectory has been symbolically linked elsewhere. */ |
059ec3d9 | 166 | |
8e669ac1 | 167 | if (path[0] == 0) |
059ec3d9 | 168 | { |
5cb8cbc6 PH |
169 | sprintf(CS buffer, CS"%s/log", CS spool_directory); |
170 | path = buffer; | |
8e669ac1 PH |
171 | } |
172 | else | |
059ec3d9 | 173 | { |
8e669ac1 | 174 | uschar *cp; |
5cb8cbc6 | 175 | if ((cp = Ustrrchr(path, '/')) != NULL) *cp = 0; |
8e669ac1 | 176 | } |
5cb8cbc6 | 177 | } |
8e669ac1 | 178 | |
8f128379 | 179 | /* We now have the path; do the business */ |
5cb8cbc6 PH |
180 | |
181 | memset(&statbuf, 0, sizeof(statbuf)); | |
182 | ||
183 | if (STATVFS(CS path, &statbuf) != 0) | |
184 | { | |
185 | log_write(0, LOG_MAIN|LOG_PANIC, "cannot accept message: failed to stat " | |
186 | "%s directory %s: %s", name, spool_directory, strerror(errno)); | |
187 | smtp_closedown(US"spool or log directory problem"); | |
188 | exim_exit(EXIT_FAILURE); | |
189 | } | |
8e669ac1 | 190 | |
5cb8cbc6 PH |
191 | *inodeptr = (statbuf.F_FILES > 0)? statbuf.F_FAVAIL : -1; |
192 | ||
193 | /* Disks are getting huge. Take care with computing the size in kilobytes. */ | |
8e669ac1 | 194 | |
5cb8cbc6 PH |
195 | return (int)(((double)statbuf.F_BAVAIL * (double)statbuf.F_FRSIZE)/1024.0); |
196 | ||
197 | /* Unable to find partition sizes in this environment. */ | |
198 | ||
199 | #else | |
200 | *inodeptr = -1; | |
201 | return -1; | |
202 | #endif | |
203 | } | |
204 | ||
059ec3d9 | 205 | |
059ec3d9 | 206 | |
5cb8cbc6 PH |
207 | |
208 | /************************************************* | |
209 | * Check space on spool and log partitions * | |
210 | *************************************************/ | |
211 | ||
212 | /* This function is called before accepting a message; if any thresholds are | |
213 | set, it checks them. If a message_size is supplied, it checks that there is | |
214 | enough space for that size plus the threshold - i.e. that the message won't | |
215 | reduce the space to the threshold. Not all OS have statvfs(); for those that | |
216 | don't, this function always returns TRUE. For some OS the old function and | |
217 | struct name statfs is used; that is handled by a macro, defined in exim.h. | |
218 | ||
219 | Arguments: | |
220 | msg_size the (estimated) size of an incoming message | |
221 | ||
222 | Returns: FALSE if there isn't enough space, or if the information cannot | |
223 | be obtained | |
224 | TRUE if no check was done or there is enough space | |
225 | */ | |
226 | ||
227 | BOOL | |
228 | receive_check_fs(int msg_size) | |
229 | { | |
230 | int space, inodes; | |
231 | ||
232 | if (check_spool_space > 0 || msg_size > 0 || check_spool_inodes > 0) | |
233 | { | |
8e669ac1 PH |
234 | space = receive_statvfs(TRUE, &inodes); |
235 | ||
059ec3d9 | 236 | DEBUG(D_receive) |
5cb8cbc6 PH |
237 | debug_printf("spool directory space = %dK inodes = %d " |
238 | "check_space = %dK inodes = %d msg_size = %d\n", | |
239 | space, inodes, check_spool_space, check_spool_inodes, msg_size); | |
8e669ac1 PH |
240 | |
241 | if ((space >= 0 && space < check_spool_space) || | |
5cb8cbc6 | 242 | (inodes >= 0 && inodes < check_spool_inodes)) |
8e669ac1 | 243 | { |
5cb8cbc6 PH |
244 | log_write(0, LOG_MAIN, "spool directory space check failed: space=%d " |
245 | "inodes=%d", space, inodes); | |
059ec3d9 PH |
246 | return FALSE; |
247 | } | |
248 | } | |
249 | ||
5cb8cbc6 PH |
250 | if (check_log_space > 0 || check_log_inodes > 0) |
251 | { | |
8e669ac1 PH |
252 | space = receive_statvfs(FALSE, &inodes); |
253 | ||
5cb8cbc6 PH |
254 | DEBUG(D_receive) |
255 | debug_printf("log directory space = %dK inodes = %d " | |
256 | "check_space = %dK inodes = %d\n", | |
257 | space, inodes, check_log_space, check_log_inodes); | |
8e669ac1 PH |
258 | |
259 | if ((space >= 0 && space < check_log_space) || | |
5cb8cbc6 | 260 | (inodes >= 0 && inodes < check_log_inodes)) |
8e669ac1 | 261 | { |
5cb8cbc6 PH |
262 | log_write(0, LOG_MAIN, "log directory space check failed: space=%d " |
263 | "inodes=%d", space, inodes); | |
264 | return FALSE; | |
265 | } | |
8e669ac1 PH |
266 | } |
267 | ||
059ec3d9 PH |
268 | return TRUE; |
269 | } | |
270 | ||
271 | ||
272 | ||
273 | /************************************************* | |
274 | * Bomb out while reading a message * | |
275 | *************************************************/ | |
276 | ||
277 | /* The common case of wanting to bomb out is if a SIGTERM or SIGINT is | |
278 | received, or if there is a timeout. A rarer case might be if the log files are | |
279 | screwed up and Exim can't open them to record a message's arrival. Handling | |
280 | that case is done by setting a flag to cause the log functions to call this | |
281 | function if there is an ultimate disaster. That is why it is globally | |
282 | accessible. | |
283 | ||
8f128379 PH |
284 | Arguments: |
285 | reason text reason to pass to the not-quit ACL | |
286 | msg default SMTP response to give if in an SMTP session | |
059ec3d9 PH |
287 | Returns: it doesn't |
288 | */ | |
289 | ||
290 | void | |
8f128379 | 291 | receive_bomb_out(uschar *reason, uschar *msg) |
059ec3d9 | 292 | { |
ead37e6c PP |
293 | static BOOL already_bombing_out; |
294 | /* The smtp_notquit_exit() below can call ACLs which can trigger recursive | |
295 | timeouts, if someone has something slow in their quit ACL. Since the only | |
296 | things we should be doing are to close down cleanly ASAP, on the second | |
297 | pass we also close down stuff that might be opened again, before bypassing | |
298 | the ACL call and exiting. */ | |
299 | ||
059ec3d9 PH |
300 | /* If spool_name is set, it contains the name of the data file that is being |
301 | written. Unlink it before closing so that it cannot be picked up by a delivery | |
302 | process. Ensure that any header file is also removed. */ | |
303 | ||
ead37e6c | 304 | if (spool_name[0] != '\0') |
059ec3d9 PH |
305 | { |
306 | Uunlink(spool_name); | |
307 | spool_name[Ustrlen(spool_name) - 1] = 'H'; | |
308 | Uunlink(spool_name); | |
ead37e6c | 309 | spool_name[0] = '\0'; |
059ec3d9 PH |
310 | } |
311 | ||
312 | /* Now close the file if it is open, either as a fd or a stream. */ | |
313 | ||
ead37e6c PP |
314 | if (data_file != NULL) |
315 | { | |
316 | (void)fclose(data_file); | |
317 | data_file = NULL; | |
318 | } else if (data_fd >= 0) { | |
319 | (void)close(data_fd); | |
320 | data_fd = -1; | |
321 | } | |
059ec3d9 | 322 | |
8f128379 PH |
323 | /* Attempt to close down an SMTP connection tidily. For non-batched SMTP, call |
324 | smtp_notquit_exit(), which runs the NOTQUIT ACL, if present, and handles the | |
325 | SMTP response. */ | |
059ec3d9 | 326 | |
ead37e6c | 327 | if (!already_bombing_out) |
059ec3d9 | 328 | { |
ead37e6c PP |
329 | already_bombing_out = TRUE; |
330 | if (smtp_input) | |
331 | { | |
332 | if (smtp_batched_input) | |
333 | moan_smtp_batch(NULL, "421 %s - message abandoned", msg); /* No return */ | |
334 | smtp_notquit_exit(reason, US"421", US"%s %s - closing connection.", | |
335 | smtp_active_hostname, msg); | |
336 | } | |
059ec3d9 PH |
337 | } |
338 | ||
339 | /* Exit from the program (non-BSMTP cases) */ | |
340 | ||
341 | exim_exit(EXIT_FAILURE); | |
342 | } | |
343 | ||
344 | ||
345 | /************************************************* | |
346 | * Data read timeout * | |
347 | *************************************************/ | |
348 | ||
349 | /* Handler function for timeouts that occur while reading the data that | |
350 | comprises a message. | |
351 | ||
352 | Argument: the signal number | |
353 | Returns: nothing | |
354 | */ | |
355 | ||
356 | static void | |
357 | data_timeout_handler(int sig) | |
358 | { | |
359 | uschar *msg = NULL; | |
360 | ||
361 | sig = sig; /* Keep picky compilers happy */ | |
362 | ||
363 | if (smtp_input) | |
364 | { | |
365 | msg = US"SMTP incoming data timeout"; | |
366 | log_write(L_lost_incoming_connection, | |
367 | LOG_MAIN, "SMTP data timeout (message abandoned) on connection " | |
fed77020 PH |
368 | "from %s F=<%s>", |
369 | (sender_fullhost != NULL)? sender_fullhost : US"local process", | |
370 | sender_address); | |
059ec3d9 PH |
371 | } |
372 | else | |
373 | { | |
374 | fprintf(stderr, "exim: timed out while reading - message abandoned\n"); | |
375 | log_write(L_lost_incoming_connection, | |
376 | LOG_MAIN, "timed out while reading local message"); | |
377 | } | |
378 | ||
8f128379 | 379 | receive_bomb_out(US"data-timeout", msg); /* Does not return */ |
059ec3d9 PH |
380 | } |
381 | ||
382 | ||
383 | ||
384 | /************************************************* | |
385 | * local_scan() timeout * | |
386 | *************************************************/ | |
387 | ||
388 | /* Handler function for timeouts that occur while running a local_scan() | |
389 | function. | |
390 | ||
391 | Argument: the signal number | |
392 | Returns: nothing | |
393 | */ | |
394 | ||
395 | static void | |
396 | local_scan_timeout_handler(int sig) | |
397 | { | |
398 | sig = sig; /* Keep picky compilers happy */ | |
399 | log_write(0, LOG_MAIN|LOG_REJECT, "local_scan() function timed out - " | |
400 | "message temporarily rejected (size %d)", message_size); | |
8f128379 PH |
401 | /* Does not return */ |
402 | receive_bomb_out(US"local-scan-timeout", US"local verification problem"); | |
059ec3d9 PH |
403 | } |
404 | ||
405 | ||
406 | ||
407 | /************************************************* | |
408 | * local_scan() crashed * | |
409 | *************************************************/ | |
410 | ||
411 | /* Handler function for signals that occur while running a local_scan() | |
412 | function. | |
413 | ||
414 | Argument: the signal number | |
415 | Returns: nothing | |
416 | */ | |
417 | ||
418 | static void | |
419 | local_scan_crash_handler(int sig) | |
420 | { | |
421 | log_write(0, LOG_MAIN|LOG_REJECT, "local_scan() function crashed with " | |
422 | "signal %d - message temporarily rejected (size %d)", sig, message_size); | |
8f128379 PH |
423 | /* Does not return */ |
424 | receive_bomb_out(US"local-scan-error", US"local verification problem"); | |
059ec3d9 PH |
425 | } |
426 | ||
427 | ||
428 | /************************************************* | |
429 | * SIGTERM or SIGINT received * | |
430 | *************************************************/ | |
431 | ||
432 | /* Handler for SIGTERM or SIGINT signals that occur while reading the | |
433 | data that comprises a message. | |
434 | ||
435 | Argument: the signal number | |
436 | Returns: nothing | |
437 | */ | |
438 | ||
439 | static void | |
440 | data_sigterm_sigint_handler(int sig) | |
441 | { | |
442 | uschar *msg = NULL; | |
443 | ||
444 | if (smtp_input) | |
445 | { | |
446 | msg = US"Service not available - SIGTERM or SIGINT received"; | |
447 | log_write(0, LOG_MAIN, "%s closed after %s", smtp_get_connection_info(), | |
448 | (sig == SIGTERM)? "SIGTERM" : "SIGINT"); | |
449 | } | |
450 | else | |
451 | { | |
f05da2e8 | 452 | if (filter_test == FTEST_NONE) |
059ec3d9 PH |
453 | { |
454 | fprintf(stderr, "\nexim: %s received - message abandoned\n", | |
455 | (sig == SIGTERM)? "SIGTERM" : "SIGINT"); | |
456 | log_write(0, LOG_MAIN, "%s received while reading local message", | |
457 | (sig == SIGTERM)? "SIGTERM" : "SIGINT"); | |
458 | } | |
459 | } | |
460 | ||
8f128379 | 461 | receive_bomb_out(US"signal-exit", msg); /* Does not return */ |
059ec3d9 PH |
462 | } |
463 | ||
464 | ||
465 | ||
466 | /************************************************* | |
467 | * Add new recipient to list * | |
468 | *************************************************/ | |
469 | ||
470 | /* This function builds a list of recipient addresses in argc/argv | |
471 | format. | |
472 | ||
473 | Arguments: | |
474 | recipient the next address to add to recipients_list | |
475 | pno parent number for fixed aliases; -1 otherwise | |
476 | ||
477 | Returns: nothing | |
478 | */ | |
479 | ||
480 | void | |
481 | receive_add_recipient(uschar *recipient, int pno) | |
482 | { | |
483 | if (recipients_count >= recipients_list_max) | |
484 | { | |
485 | recipient_item *oldlist = recipients_list; | |
486 | int oldmax = recipients_list_max; | |
487 | recipients_list_max = recipients_list_max? 2*recipients_list_max : 50; | |
488 | recipients_list = store_get(recipients_list_max * sizeof(recipient_item)); | |
489 | if (oldlist != NULL) | |
490 | memcpy(recipients_list, oldlist, oldmax * sizeof(recipient_item)); | |
491 | } | |
492 | ||
493 | recipients_list[recipients_count].address = recipient; | |
494 | recipients_list[recipients_count].pno = pno; | |
8523533c TK |
495 | #ifdef EXPERIMENTAL_BRIGHTMAIL |
496 | recipients_list[recipients_count].bmi_optin = bmi_current_optin; | |
497 | /* reset optin string pointer for next recipient */ | |
498 | bmi_current_optin = NULL; | |
499 | #endif | |
059ec3d9 PH |
500 | recipients_list[recipients_count++].errors_to = NULL; |
501 | } | |
502 | ||
503 | ||
504 | ||
505 | ||
fd98a5c6 JH |
506 | /************************************************* |
507 | * Send user response message * | |
508 | *************************************************/ | |
61147df4 | 509 | |
fd98a5c6 JH |
510 | /* This function is passed a default response code and a user message. It calls |
511 | smtp_message_code() to check and possibly modify the response code, and then | |
512 | calls smtp_respond() to transmit the response. I put this into a function | |
513 | just to avoid a lot of repetition. | |
61147df4 PP |
514 | |
515 | Arguments: | |
fd98a5c6 JH |
516 | code the response code |
517 | user_msg the user message | |
518 | ||
519 | Returns: nothing | |
61147df4 PP |
520 | */ |
521 | ||
522 | #ifdef EXPERIMENTAL_PRDR | |
523 | static void | |
fd98a5c6 | 524 | smtp_user_msg(uschar *code, uschar *user_msg) |
61147df4 | 525 | { |
fd98a5c6 JH |
526 | int len = 3; |
527 | smtp_message_code(&code, &len, &user_msg, NULL); | |
528 | smtp_respond(code, len, TRUE, user_msg); | |
61147df4 PP |
529 | } |
530 | #endif | |
531 | ||
532 | ||
533 | ||
534 | ||
fd98a5c6 | 535 | |
059ec3d9 PH |
536 | /************************************************* |
537 | * Remove a recipient from the list * | |
538 | *************************************************/ | |
539 | ||
540 | /* This function is provided for local_scan() to use. | |
541 | ||
542 | Argument: | |
543 | recipient address to remove | |
544 | ||
545 | Returns: TRUE if it did remove something; FALSE otherwise | |
546 | */ | |
547 | ||
548 | BOOL | |
549 | receive_remove_recipient(uschar *recipient) | |
550 | { | |
551 | int count; | |
552 | DEBUG(D_receive) debug_printf("receive_remove_recipient(\"%s\") called\n", | |
553 | recipient); | |
554 | for (count = 0; count < recipients_count; count++) | |
555 | { | |
556 | if (Ustrcmp(recipients_list[count].address, recipient) == 0) | |
557 | { | |
558 | if ((--recipients_count - count) > 0) | |
559 | memmove(recipients_list + count, recipients_list + count + 1, | |
54cdb463 | 560 | (recipients_count - count)*sizeof(recipient_item)); |
059ec3d9 PH |
561 | return TRUE; |
562 | } | |
563 | } | |
564 | return FALSE; | |
565 | } | |
566 | ||
567 | ||
568 | ||
569 | ||
570 | ||
571 | /************************************************* | |
572 | * Read data portion of a non-SMTP message * | |
573 | *************************************************/ | |
574 | ||
575 | /* This function is called to read the remainder of a message (following the | |
576 | header) when the input is not from SMTP - we are receiving a local message on | |
577 | a standard input stream. The message is always terminated by EOF, and is also | |
578 | terminated by a dot on a line by itself if the flag dot_ends is TRUE. Split the | |
579 | two cases for maximum efficiency. | |
580 | ||
581 | Ensure that the body ends with a newline. This will naturally be the case when | |
582 | the termination is "\n.\n" but may not be otherwise. The RFC defines messages | |
583 | as "sequences of lines" - this of course strictly applies only to SMTP, but | |
584 | deliveries into BSD-type mailbox files also require it. Exim used to have a | |
585 | flag for doing this at delivery time, but as it was always set for all | |
586 | transports, I decided to simplify things by putting the check here instead. | |
587 | ||
588 | There is at least one MUA (dtmail) that sends CRLF via this interface, and | |
589 | other programs are known to do this as well. Exim used to have a option for | |
590 | dealing with this: in July 2003, after much discussion, the code has been | |
591 | changed to default to treat any of LF, CRLF, and bare CR as line terminators. | |
592 | ||
593 | However, for the case when a dot on a line by itself terminates a message, the | |
594 | only recognized terminating sequences before and after the dot are LF and CRLF. | |
595 | Otherwise, having read EOL . CR, you don't know whether to read another | |
596 | character or not. | |
597 | ||
598 | Internally, in messages stored in Exim's spool files, LF is used as the line | |
599 | terminator. Under the new regime, bare CRs will no longer appear in these | |
600 | files. | |
601 | ||
602 | Arguments: | |
603 | fout a FILE to which to write the message | |
604 | ||
605 | Returns: One of the END_xxx values indicating why it stopped reading | |
606 | */ | |
607 | ||
608 | static int | |
609 | read_message_data(FILE *fout) | |
610 | { | |
611 | int ch_state; | |
612 | register int ch; | |
d677b2f2 | 613 | register int linelength = 0; |
059ec3d9 PH |
614 | |
615 | /* Handle the case when only EOF terminates the message */ | |
616 | ||
617 | if (!dot_ends) | |
618 | { | |
619 | register int last_ch = '\n'; | |
620 | ||
80a47a2c | 621 | for (; (ch = (receive_getc)()) != EOF; last_ch = ch) |
059ec3d9 PH |
622 | { |
623 | if (ch == 0) body_zerocount++; | |
624 | if (last_ch == '\r' && ch != '\n') | |
625 | { | |
d677b2f2 PH |
626 | if (linelength > max_received_linelength) |
627 | max_received_linelength = linelength; | |
628 | linelength = 0; | |
059ec3d9 PH |
629 | if (fputc('\n', fout) == EOF) return END_WERROR; |
630 | message_size++; | |
631 | body_linecount++; | |
632 | } | |
633 | if (ch == '\r') continue; | |
634 | ||
635 | if (fputc(ch, fout) == EOF) return END_WERROR; | |
d677b2f2 PH |
636 | if (ch == '\n') |
637 | { | |
638 | if (linelength > max_received_linelength) | |
639 | max_received_linelength = linelength; | |
640 | linelength = 0; | |
641 | body_linecount++; | |
642 | } | |
643 | else linelength++; | |
059ec3d9 PH |
644 | if (++message_size > thismessage_size_limit) return END_SIZE; |
645 | } | |
646 | ||
647 | if (last_ch != '\n') | |
648 | { | |
d677b2f2 PH |
649 | if (linelength > max_received_linelength) |
650 | max_received_linelength = linelength; | |
059ec3d9 PH |
651 | if (fputc('\n', fout) == EOF) return END_WERROR; |
652 | message_size++; | |
653 | body_linecount++; | |
654 | } | |
655 | ||
656 | return END_EOF; | |
657 | } | |
658 | ||
659 | /* Handle the case when a dot on a line on its own, or EOF, terminates. */ | |
660 | ||
661 | ch_state = 1; | |
662 | ||
80a47a2c | 663 | while ((ch = (receive_getc)()) != EOF) |
059ec3d9 PH |
664 | { |
665 | if (ch == 0) body_zerocount++; | |
666 | switch (ch_state) | |
667 | { | |
668 | case 0: /* Normal state (previous char written) */ | |
669 | if (ch == '\n') | |
d677b2f2 PH |
670 | { |
671 | body_linecount++; | |
672 | if (linelength > max_received_linelength) | |
673 | max_received_linelength = linelength; | |
674 | linelength = -1; | |
675 | ch_state = 1; | |
676 | } | |
059ec3d9 PH |
677 | else if (ch == '\r') |
678 | { ch_state = 2; continue; } | |
679 | break; | |
680 | ||
681 | case 1: /* After written "\n" */ | |
682 | if (ch == '.') { ch_state = 3; continue; } | |
d677b2f2 | 683 | if (ch != '\n') ch_state = 0; else linelength = -1; |
059ec3d9 PH |
684 | break; |
685 | ||
686 | case 2: | |
687 | body_linecount++; /* After unwritten "\r" */ | |
d677b2f2 PH |
688 | if (linelength > max_received_linelength) |
689 | max_received_linelength = linelength; | |
059ec3d9 | 690 | if (ch == '\n') |
d677b2f2 PH |
691 | { |
692 | ch_state = 1; | |
693 | linelength = -1; | |
694 | } | |
059ec3d9 PH |
695 | else |
696 | { | |
697 | if (message_size++, fputc('\n', fout) == EOF) return END_WERROR; | |
698 | if (ch == '\r') continue; | |
699 | ch_state = 0; | |
d677b2f2 | 700 | linelength = 0; |
059ec3d9 PH |
701 | } |
702 | break; | |
703 | ||
704 | case 3: /* After "\n." (\n written, dot not) */ | |
705 | if (ch == '\n') return END_DOT; | |
706 | if (ch == '\r') { ch_state = 4; continue; } | |
707 | message_size++; | |
d677b2f2 | 708 | linelength++; |
059ec3d9 PH |
709 | if (fputc('.', fout) == EOF) return END_WERROR; |
710 | ch_state = 0; | |
711 | break; | |
712 | ||
713 | case 4: /* After "\n.\r" (\n written, rest not) */ | |
714 | if (ch == '\n') return END_DOT; | |
715 | message_size += 2; | |
716 | body_linecount++; | |
717 | if (fputs(".\n", fout) == EOF) return END_WERROR; | |
718 | if (ch == '\r') { ch_state = 2; continue; } | |
719 | ch_state = 0; | |
720 | break; | |
721 | } | |
722 | ||
d677b2f2 | 723 | linelength++; |
059ec3d9 PH |
724 | if (fputc(ch, fout) == EOF) return END_WERROR; |
725 | if (++message_size > thismessage_size_limit) return END_SIZE; | |
726 | } | |
727 | ||
728 | /* Get here if EOF read. Unless we have just written "\n", we need to ensure | |
729 | the message ends with a newline, and we must also write any characters that | |
730 | were saved up while testing for an ending dot. */ | |
731 | ||
732 | if (ch_state != 1) | |
733 | { | |
734 | static uschar *ends[] = { US"\n", NULL, US"\n", US".\n", US".\n" }; | |
735 | if (fputs(CS ends[ch_state], fout) == EOF) return END_WERROR; | |
736 | message_size += Ustrlen(ends[ch_state]); | |
737 | body_linecount++; | |
738 | } | |
739 | ||
740 | return END_EOF; | |
741 | } | |
742 | ||
743 | ||
744 | ||
745 | ||
746 | /************************************************* | |
747 | * Read data portion of an SMTP message * | |
748 | *************************************************/ | |
749 | ||
750 | /* This function is called to read the remainder of an SMTP message (after the | |
751 | headers), or to skip over it when an error has occurred. In this case, the | |
752 | output file is passed as NULL. | |
753 | ||
754 | If any line begins with a dot, that character is skipped. The input should only | |
755 | be successfully terminated by CR LF . CR LF unless it is local (non-network) | |
756 | SMTP, in which case the CRs are optional, but... | |
757 | ||
758 | FUDGE: It seems that sites on the net send out messages with just LF | |
759 | terminators, despite the warnings in the RFCs, and other MTAs handle this. So | |
760 | we make the CRs optional in all cases. | |
761 | ||
762 | July 2003: Bare CRs cause trouble. We now treat them as line terminators as | |
763 | well, so that there are no CRs in spooled messages. However, the message | |
764 | terminating dot is not recognized between two bare CRs. | |
765 | ||
766 | Arguments: | |
767 | fout a FILE to which to write the message; NULL if skipping | |
768 | ||
769 | Returns: One of the END_xxx values indicating why it stopped reading | |
770 | */ | |
771 | ||
772 | static int | |
773 | read_message_data_smtp(FILE *fout) | |
774 | { | |
775 | int ch_state = 0; | |
e4bdf652 | 776 | int ch; |
1f5497b2 | 777 | register int linelength = 0; |
059ec3d9 | 778 | |
80a47a2c | 779 | while ((ch = (receive_getc)()) != EOF) |
059ec3d9 PH |
780 | { |
781 | if (ch == 0) body_zerocount++; | |
782 | switch (ch_state) | |
783 | { | |
784 | case 0: /* After LF or CRLF */ | |
785 | if (ch == '.') | |
786 | { | |
787 | ch_state = 3; | |
788 | continue; /* Don't ever write . after LF */ | |
789 | } | |
790 | ch_state = 1; | |
791 | ||
792 | /* Else fall through to handle as normal uschar. */ | |
793 | ||
794 | case 1: /* Normal state */ | |
795 | if (ch == '\n') | |
796 | { | |
797 | ch_state = 0; | |
798 | body_linecount++; | |
1f5497b2 PH |
799 | if (linelength > max_received_linelength) |
800 | max_received_linelength = linelength; | |
801 | linelength = -1; | |
059ec3d9 PH |
802 | } |
803 | else if (ch == '\r') | |
804 | { | |
805 | ch_state = 2; | |
806 | continue; | |
807 | } | |
808 | break; | |
809 | ||
810 | case 2: /* After (unwritten) CR */ | |
811 | body_linecount++; | |
1f5497b2 PH |
812 | if (linelength > max_received_linelength) |
813 | max_received_linelength = linelength; | |
814 | linelength = -1; | |
059ec3d9 PH |
815 | if (ch == '\n') |
816 | { | |
817 | ch_state = 0; | |
818 | } | |
819 | else | |
820 | { | |
821 | message_size++; | |
822 | if (fout != NULL && fputc('\n', fout) == EOF) return END_WERROR; | |
e4bdf652 | 823 | (void) cutthrough_put_nl(); |
059ec3d9 PH |
824 | if (ch != '\r') ch_state = 1; else continue; |
825 | } | |
826 | break; | |
827 | ||
828 | case 3: /* After [CR] LF . */ | |
829 | if (ch == '\n') | |
830 | return END_DOT; | |
831 | if (ch == '\r') | |
832 | { | |
833 | ch_state = 4; | |
834 | continue; | |
835 | } | |
836 | ch_state = 1; /* The dot itself is removed */ | |
837 | break; | |
838 | ||
839 | case 4: /* After [CR] LF . CR */ | |
840 | if (ch == '\n') return END_DOT; | |
841 | message_size++; | |
842 | body_linecount++; | |
843 | if (fout != NULL && fputc('\n', fout) == EOF) return END_WERROR; | |
e4bdf652 | 844 | (void) cutthrough_put_nl(); |
059ec3d9 PH |
845 | if (ch == '\r') |
846 | { | |
847 | ch_state = 2; | |
848 | continue; | |
849 | } | |
850 | ch_state = 1; | |
851 | break; | |
852 | } | |
853 | ||
854 | /* Add the character to the spool file, unless skipping; then loop for the | |
855 | next. */ | |
856 | ||
857 | message_size++; | |
1f5497b2 | 858 | linelength++; |
059ec3d9 PH |
859 | if (fout != NULL) |
860 | { | |
861 | if (fputc(ch, fout) == EOF) return END_WERROR; | |
862 | if (message_size > thismessage_size_limit) return END_SIZE; | |
863 | } | |
e4bdf652 JH |
864 | if(ch == '\n') |
865 | (void) cutthrough_put_nl(); | |
866 | else | |
867 | { | |
868 | uschar c= ch; | |
869 | (void) cutthrough_puts(&c, 1); | |
870 | } | |
059ec3d9 PH |
871 | } |
872 | ||
873 | /* Fall through here if EOF encountered. This indicates some kind of error, | |
874 | since a correct message is terminated by [CR] LF . [CR] LF. */ | |
875 | ||
876 | return END_EOF; | |
877 | } | |
878 | ||
879 | ||
880 | ||
881 | ||
882 | /************************************************* | |
883 | * Swallow SMTP message * | |
884 | *************************************************/ | |
885 | ||
886 | /* This function is called when there has been some kind of error while reading | |
887 | an SMTP message, and the remaining data may need to be swallowed. It is global | |
888 | because it is called from smtp_closedown() to shut down an incoming call | |
889 | tidily. | |
890 | ||
891 | Argument: a FILE from which to read the message | |
892 | Returns: nothing | |
893 | */ | |
894 | ||
895 | void | |
896 | receive_swallow_smtp(void) | |
897 | { | |
898 | if (message_ended >= END_NOTENDED) | |
899 | message_ended = read_message_data_smtp(NULL); | |
900 | } | |
901 | ||
902 | ||
903 | ||
904 | /************************************************* | |
905 | * Handle lost SMTP connection * | |
906 | *************************************************/ | |
907 | ||
908 | /* This function logs connection loss incidents and generates an appropriate | |
909 | SMTP response. | |
910 | ||
911 | Argument: additional data for the message | |
912 | Returns: the SMTP response | |
913 | */ | |
914 | ||
915 | static uschar * | |
916 | handle_lost_connection(uschar *s) | |
917 | { | |
918 | log_write(L_lost_incoming_connection | L_smtp_connection, LOG_MAIN, | |
919 | "%s lost while reading message data%s", smtp_get_connection_info(), s); | |
920 | return US"421 Lost incoming connection"; | |
921 | } | |
922 | ||
923 | ||
924 | ||
925 | ||
926 | /************************************************* | |
927 | * Handle a non-smtp reception error * | |
928 | *************************************************/ | |
929 | ||
930 | /* This function is called for various errors during the reception of non-SMTP | |
931 | messages. It either sends a message to the sender of the problem message, or it | |
932 | writes to the standard error stream. | |
933 | ||
934 | Arguments: | |
935 | errcode code for moan_to_sender(), identifying the error | |
936 | text1 first message text, passed to moan_to_sender() | |
937 | text2 second message text, used only for stderrr | |
938 | error_rc code to pass to exim_exit if no problem | |
939 | f FILE containing body of message (may be stdin) | |
940 | hptr pointer to instore headers or NULL | |
941 | ||
942 | Returns: calls exim_exit(), which does not return | |
943 | */ | |
944 | ||
945 | static void | |
946 | give_local_error(int errcode, uschar *text1, uschar *text2, int error_rc, | |
947 | FILE *f, header_line *hptr) | |
948 | { | |
949 | if (error_handling == ERRORS_SENDER) | |
950 | { | |
951 | error_block eblock; | |
952 | eblock.next = NULL; | |
953 | eblock.text1 = text1; | |
954 | if (!moan_to_sender(errcode, &eblock, hptr, f, FALSE)) | |
955 | error_rc = EXIT_FAILURE; | |
956 | } | |
957 | else fprintf(stderr, "exim: %s%s\n", text2, text1); /* Sic */ | |
f1e894f3 | 958 | (void)fclose(f); |
059ec3d9 PH |
959 | exim_exit(error_rc); |
960 | } | |
961 | ||
962 | ||
963 | ||
964 | /************************************************* | |
965 | * Add header lines set up by ACL * | |
966 | *************************************************/ | |
967 | ||
850635b6 PH |
968 | /* This function is called to add the header lines that were set up by |
969 | statements in an ACL to the list of headers in memory. It is done in two stages | |
970 | like this, because when the ACL for RCPT is running, the other headers have not | |
971 | yet been received. This function is called twice; once just before running the | |
972 | DATA ACL, and once after. This is so that header lines added by MAIL or RCPT | |
973 | are visible to the DATA ACL. | |
059ec3d9 PH |
974 | |
975 | Originally these header lines were added at the end. Now there is support for | |
976 | three different places: top, bottom, and after the Received: header(s). There | |
977 | will always be at least one Received: header, even if it is marked deleted, and | |
978 | even if something else has been put in front of it. | |
979 | ||
980 | Arguments: | |
981 | acl_name text to identify which ACL | |
982 | ||
983 | Returns: nothing | |
984 | */ | |
985 | ||
986 | static void | |
578d43dc | 987 | add_acl_headers(int where, uschar *acl_name) |
059ec3d9 PH |
988 | { |
989 | header_line *h, *next; | |
990 | header_line *last_received = NULL; | |
e7568d51 | 991 | |
578d43dc JH |
992 | switch(where) |
993 | { | |
994 | case ACL_WHERE_DKIM: | |
995 | case ACL_WHERE_MIME: | |
996 | case ACL_WHERE_DATA: if (cutthrough_fd >= 0 && (acl_removed_headers || acl_added_headers)) | |
997 | { | |
998 | log_write(0, LOG_MAIN|LOG_PANIC, "Header modification in data ACLs" | |
999 | "will not take effect on cutthrough deliveries"); | |
1000 | return; | |
1001 | } | |
1002 | } | |
1003 | ||
e7568d51 TL |
1004 | if (acl_removed_headers != NULL) |
1005 | { | |
1006 | DEBUG(D_receive|D_acl) debug_printf(">>Headers removed by %s ACL:\n", acl_name); | |
1007 | ||
1008 | for (h = header_list; h != NULL; h = h->next) | |
1009 | { | |
e7568d51 TL |
1010 | uschar *list; |
1011 | BOOL include_header; | |
1012 | ||
1013 | if (h->type == htype_old) continue; | |
1014 | ||
1015 | include_header = TRUE; | |
1016 | list = acl_removed_headers; | |
1017 | ||
1018 | int sep = ':'; /* This is specified as a colon-separated list */ | |
1019 | uschar *s; | |
1020 | uschar buffer[128]; | |
1021 | while ((s = string_nextinlist(&list, &sep, buffer, sizeof(buffer))) | |
1022 | != NULL) | |
1023 | { | |
1024 | int len = Ustrlen(s); | |
1025 | if (header_testname(h, s, len, FALSE)) | |
1026 | { | |
1027 | h->type = htype_old; | |
1028 | DEBUG(D_receive|D_acl) debug_printf(" %s", h->text); | |
1029 | } | |
1030 | } | |
1031 | } | |
1032 | acl_removed_headers = NULL; | |
1033 | DEBUG(D_receive|D_acl) debug_printf(">>\n"); | |
1034 | } | |
059ec3d9 | 1035 | |
71fafd95 | 1036 | if (acl_added_headers == NULL) return; |
059ec3d9 PH |
1037 | DEBUG(D_receive|D_acl) debug_printf(">>Headers added by %s ACL:\n", acl_name); |
1038 | ||
71fafd95 | 1039 | for (h = acl_added_headers; h != NULL; h = next) |
059ec3d9 PH |
1040 | { |
1041 | next = h->next; | |
1042 | ||
1043 | switch(h->type) | |
1044 | { | |
1045 | case htype_add_top: | |
1046 | h->next = header_list; | |
1047 | header_list = h; | |
1048 | DEBUG(D_receive|D_acl) debug_printf(" (at top)"); | |
1049 | break; | |
1050 | ||
1051 | case htype_add_rec: | |
1052 | if (last_received == NULL) | |
1053 | { | |
1054 | last_received = header_list; | |
1055 | while (!header_testname(last_received, US"Received", 8, FALSE)) | |
1056 | last_received = last_received->next; | |
1057 | while (last_received->next != NULL && | |
1058 | header_testname(last_received->next, US"Received", 8, FALSE)) | |
1059 | last_received = last_received->next; | |
1060 | } | |
1061 | h->next = last_received->next; | |
1062 | last_received->next = h; | |
1063 | DEBUG(D_receive|D_acl) debug_printf(" (after Received:)"); | |
1064 | break; | |
1065 | ||
8523533c TK |
1066 | case htype_add_rfc: |
1067 | /* add header before any header which is NOT Received: or Resent- */ | |
1068 | last_received = header_list; | |
1069 | while ( (last_received->next != NULL) && | |
1070 | ( (header_testname(last_received->next, US"Received", 8, FALSE)) || | |
1071 | (header_testname_incomplete(last_received->next, US"Resent-", 7, FALSE)) ) ) | |
1072 | last_received = last_received->next; | |
1073 | /* last_received now points to the last Received: or Resent-* header | |
1074 | in an uninterrupted chain of those header types (seen from the beginning | |
1075 | of all headers. Our current header must follow it. */ | |
1076 | h->next = last_received->next; | |
1077 | last_received->next = h; | |
8e669ac1 | 1078 | DEBUG(D_receive|D_acl) debug_printf(" (before any non-Received: or Resent-*: header)"); |
8523533c TK |
1079 | break; |
1080 | ||
059ec3d9 PH |
1081 | default: |
1082 | h->next = NULL; | |
1083 | header_last->next = h; | |
1084 | break; | |
1085 | } | |
1086 | ||
1087 | if (h->next == NULL) header_last = h; | |
1088 | ||
1089 | /* Check for one of the known header types (From:, To:, etc.) though in | |
1090 | practice most added headers are going to be "other". Lower case | |
1091 | identification letters are never stored with the header; they are used | |
1092 | for existence tests when messages are received. So discard any lower case | |
1093 | flag values. */ | |
1094 | ||
1095 | h->type = header_checkname(h, FALSE); | |
1096 | if (h->type >= 'a') h->type = htype_other; | |
1097 | ||
1098 | DEBUG(D_receive|D_acl) debug_printf(" %s", header_last->text); | |
1099 | } | |
1100 | ||
71fafd95 | 1101 | acl_added_headers = NULL; |
059ec3d9 PH |
1102 | DEBUG(D_receive|D_acl) debug_printf(">>\n"); |
1103 | } | |
1104 | ||
1105 | ||
1106 | ||
1107 | /************************************************* | |
1108 | * Add host information for log line * | |
1109 | *************************************************/ | |
1110 | ||
1111 | /* Called for acceptance and rejecting log lines. This adds information about | |
1112 | the calling host to a string that is being built dynamically. | |
1113 | ||
1114 | Arguments: | |
1115 | s the dynamic string | |
1116 | sizeptr points to the size variable | |
1117 | ptrptr points to the pointer variable | |
1118 | ||
1119 | Returns: the extended string | |
1120 | */ | |
1121 | ||
1122 | static uschar * | |
1123 | add_host_info_for_log(uschar *s, int *sizeptr, int *ptrptr) | |
1124 | { | |
1125 | if (sender_fullhost != NULL) | |
1126 | { | |
1127 | s = string_append(s, sizeptr, ptrptr, 2, US" H=", sender_fullhost); | |
1128 | if ((log_extra_selector & LX_incoming_interface) != 0 && | |
1129 | interface_address != NULL) | |
1130 | { | |
1131 | uschar *ss = string_sprintf(" I=[%s]:%d", interface_address, | |
1132 | interface_port); | |
1133 | s = string_cat(s, sizeptr, ptrptr, ss, Ustrlen(ss)); | |
1134 | } | |
1135 | } | |
1136 | if (sender_ident != NULL) | |
1137 | s = string_append(s, sizeptr, ptrptr, 2, US" U=", sender_ident); | |
1138 | if (received_protocol != NULL) | |
1139 | s = string_append(s, sizeptr, ptrptr, 2, US" P=", received_protocol); | |
1140 | return s; | |
1141 | } | |
1142 | ||
1143 | ||
1144 | ||
63955bf2 | 1145 | #ifdef WITH_CONTENT_SCAN |
059ec3d9 | 1146 | |
54cdb463 PH |
1147 | /************************************************* |
1148 | * Run the MIME ACL on a message * | |
1149 | *************************************************/ | |
1150 | ||
1151 | /* This code is in a subroutine so that it can be used for both SMTP | |
1152 | and non-SMTP messages. It is called with a non-NULL ACL pointer. | |
1153 | ||
1154 | Arguments: | |
1155 | acl The ACL to run (acl_smtp_mime or acl_not_smtp_mime) | |
1156 | smtp_yield_ptr Set FALSE to kill messages after dropped connection | |
1157 | smtp_reply_ptr Where SMTP reply is being built | |
1158 | blackholed_by_ptr Where "blackholed by" message is being built | |
1159 | ||
1160 | Returns: TRUE to carry on; FALSE to abandon the message | |
1161 | */ | |
1162 | ||
1163 | static BOOL | |
1164 | run_mime_acl(uschar *acl, BOOL *smtp_yield_ptr, uschar **smtp_reply_ptr, | |
1165 | uschar **blackholed_by_ptr) | |
1166 | { | |
1167 | FILE *mbox_file; | |
1168 | uschar rfc822_file_path[2048]; | |
1169 | unsigned long mbox_size; | |
1170 | header_line *my_headerlist; | |
1171 | uschar *user_msg, *log_msg; | |
1172 | int mime_part_count_buffer = -1; | |
7156b1ef | 1173 | int rc = OK; |
54cdb463 PH |
1174 | |
1175 | memset(CS rfc822_file_path,0,2048); | |
1176 | ||
1177 | /* check if it is a MIME message */ | |
1178 | my_headerlist = header_list; | |
4e88a19f PH |
1179 | while (my_headerlist != NULL) |
1180 | { | |
54cdb463 | 1181 | /* skip deleted headers */ |
4e88a19f PH |
1182 | if (my_headerlist->type == '*') |
1183 | { | |
54cdb463 PH |
1184 | my_headerlist = my_headerlist->next; |
1185 | continue; | |
4e88a19f PH |
1186 | } |
1187 | if (strncmpic(my_headerlist->text, US"Content-Type:", 13) == 0) | |
1188 | { | |
54cdb463 PH |
1189 | DEBUG(D_receive) debug_printf("Found Content-Type: header - executing acl_smtp_mime.\n"); |
1190 | goto DO_MIME_ACL; | |
4e88a19f | 1191 | } |
54cdb463 | 1192 | my_headerlist = my_headerlist->next; |
4e88a19f | 1193 | } |
54cdb463 PH |
1194 | |
1195 | DEBUG(D_receive) debug_printf("No Content-Type: header - presumably not a MIME message.\n"); | |
1196 | return TRUE; | |
1197 | ||
1198 | DO_MIME_ACL: | |
1199 | /* make sure the eml mbox file is spooled up */ | |
8544e77a | 1200 | mbox_file = spool_mbox(&mbox_size, NULL); |
54cdb463 PH |
1201 | if (mbox_file == NULL) { |
1202 | /* error while spooling */ | |
1203 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1204 | "acl_smtp_mime: error while creating mbox spool file, message temporarily rejected."); | |
1205 | Uunlink(spool_name); | |
1206 | unspool_mbox(); | |
6f0c431a PP |
1207 | #ifdef EXPERIMENTAL_DCC |
1208 | dcc_ok = 0; | |
1209 | #endif | |
a5bd321b | 1210 | smtp_respond(US"451", 3, TRUE, US"temporary local problem"); |
54cdb463 PH |
1211 | message_id[0] = 0; /* Indicate no message accepted */ |
1212 | *smtp_reply_ptr = US""; /* Indicate reply already sent */ | |
1213 | return FALSE; /* Indicate skip to end of receive function */ | |
1214 | }; | |
1215 | ||
1216 | mime_is_rfc822 = 0; | |
1217 | ||
1218 | MIME_ACL_CHECK: | |
1219 | mime_part_count = -1; | |
1220 | rc = mime_acl_check(acl, mbox_file, NULL, &user_msg, &log_msg); | |
f1e894f3 | 1221 | (void)fclose(mbox_file); |
54cdb463 | 1222 | |
4e88a19f PH |
1223 | if (Ustrlen(rfc822_file_path) > 0) |
1224 | { | |
54cdb463 PH |
1225 | mime_part_count = mime_part_count_buffer; |
1226 | ||
4e88a19f PH |
1227 | if (unlink(CS rfc822_file_path) == -1) |
1228 | { | |
54cdb463 PH |
1229 | log_write(0, LOG_PANIC, |
1230 | "acl_smtp_mime: can't unlink RFC822 spool file, skipping."); | |
1231 | goto END_MIME_ACL; | |
4e88a19f PH |
1232 | } |
1233 | } | |
54cdb463 PH |
1234 | |
1235 | /* check if we must check any message/rfc822 attachments */ | |
4e88a19f PH |
1236 | if (rc == OK) |
1237 | { | |
54cdb463 PH |
1238 | uschar temp_path[1024]; |
1239 | int n; | |
1240 | struct dirent *entry; | |
1241 | DIR *tempdir; | |
1242 | ||
b07e6aa3 PH |
1243 | (void)string_format(temp_path, 1024, "%s/scan/%s", spool_directory, |
1244 | message_id); | |
54cdb463 | 1245 | |
4e88a19f PH |
1246 | tempdir = opendir(CS temp_path); |
1247 | n = 0; | |
1248 | do | |
1249 | { | |
1250 | entry = readdir(tempdir); | |
1251 | if (entry == NULL) break; | |
1252 | if (strncmpic(US entry->d_name,US"__rfc822_",9) == 0) | |
1253 | { | |
b07e6aa3 | 1254 | (void)string_format(rfc822_file_path, 2048,"%s/scan/%s/%s", spool_directory, message_id, entry->d_name); |
4e88a19f PH |
1255 | debug_printf("RFC822 attachment detected: running MIME ACL for '%s'\n", rfc822_file_path); |
1256 | break; | |
1257 | } | |
1258 | } while (1); | |
1259 | closedir(tempdir); | |
54cdb463 | 1260 | |
4e88a19f PH |
1261 | if (entry != NULL) |
1262 | { | |
c58b88df | 1263 | mbox_file = Ufopen(rfc822_file_path,"rb"); |
4e88a19f PH |
1264 | if (mbox_file == NULL) |
1265 | { | |
54cdb463 PH |
1266 | log_write(0, LOG_PANIC, |
1267 | "acl_smtp_mime: can't open RFC822 spool file, skipping."); | |
1268 | unlink(CS rfc822_file_path); | |
1269 | goto END_MIME_ACL; | |
4e88a19f | 1270 | } |
54cdb463 PH |
1271 | /* set RFC822 expansion variable */ |
1272 | mime_is_rfc822 = 1; | |
1273 | mime_part_count_buffer = mime_part_count; | |
1274 | goto MIME_ACL_CHECK; | |
4e88a19f PH |
1275 | } |
1276 | } | |
54cdb463 PH |
1277 | |
1278 | END_MIME_ACL: | |
578d43dc | 1279 | add_acl_headers(ACL_WHERE_MIME, US"MIME"); |
54cdb463 PH |
1280 | if (rc == DISCARD) |
1281 | { | |
1282 | recipients_count = 0; | |
1283 | *blackholed_by_ptr = US"MIME ACL"; | |
1284 | } | |
1285 | else if (rc != OK) | |
1286 | { | |
1287 | Uunlink(spool_name); | |
1288 | unspool_mbox(); | |
6f0c431a PP |
1289 | #ifdef EXPERIMENTAL_DCC |
1290 | dcc_ok = 0; | |
1291 | #endif | |
f4c1088b | 1292 | if (smtp_input && smtp_handle_acl_fail(ACL_WHERE_MIME, rc, user_msg, log_msg) != 0) { |
54cdb463 | 1293 | *smtp_yield_ptr = FALSE; /* No more messsages after dropped connection */ |
f4c1088b PP |
1294 | *smtp_reply_ptr = US""; /* Indicate reply already sent */ |
1295 | } | |
54cdb463 PH |
1296 | message_id[0] = 0; /* Indicate no message accepted */ |
1297 | return FALSE; /* Cause skip to end of receive function */ | |
4e88a19f | 1298 | } |
54cdb463 PH |
1299 | |
1300 | return TRUE; | |
1301 | } | |
1302 | ||
63955bf2 | 1303 | #endif /* WITH_CONTENT_SCAN */ |
54cdb463 PH |
1304 | |
1305 | ||
e4bdf652 JH |
1306 | |
1307 | void | |
1308 | received_header_gen(void) | |
1309 | { | |
1310 | uschar *received; | |
1311 | uschar *timestamp; | |
1312 | header_line *received_header= header_list; | |
1313 | ||
1314 | timestamp = expand_string(US"${tod_full}"); | |
1315 | if (recipients_count == 1) received_for = recipients_list[0].address; | |
1316 | received = expand_string(received_header_text); | |
1317 | received_for = NULL; | |
1318 | ||
1319 | if (received == NULL) | |
1320 | { | |
1321 | if(spool_name[0] != 0) | |
1322 | Uunlink(spool_name); /* Lose the data file */ | |
1323 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Expansion of \"%s\" " | |
1324 | "(received_header_text) failed: %s", string_printing(received_header_text), | |
1325 | expand_string_message); | |
1326 | } | |
1327 | ||
1328 | /* The first element on the header chain is reserved for the Received header, | |
1329 | so all we have to do is fill in the text pointer, and set the type. However, if | |
1330 | the result of the expansion is an empty string, we leave the header marked as | |
1331 | "old" so as to refrain from adding a Received header. */ | |
1332 | ||
1333 | if (received[0] == 0) | |
1334 | { | |
1335 | received_header->text = string_sprintf("Received: ; %s\n", timestamp); | |
1336 | received_header->type = htype_old; | |
1337 | } | |
1338 | else | |
1339 | { | |
1340 | received_header->text = string_sprintf("%s; %s\n", received, timestamp); | |
1341 | received_header->type = htype_received; | |
1342 | } | |
1343 | ||
1344 | received_header->slen = Ustrlen(received_header->text); | |
1345 | ||
1346 | DEBUG(D_receive) debug_printf(">>Generated Received: header line\n%c %s", | |
1347 | received_header->type, received_header->text); | |
1348 | } | |
1349 | ||
1350 | ||
1351 | ||
059ec3d9 PH |
1352 | /************************************************* |
1353 | * Receive message * | |
1354 | *************************************************/ | |
1355 | ||
1356 | /* Receive a message on the given input, and put it into a pair of spool files. | |
1357 | Either a non-null list of recipients, or the extract flag will be true, or | |
1358 | both. The flag sender_local is true for locally generated messages. The flag | |
1359 | submission_mode is true if an ACL has obeyed "control = submission". The flag | |
8800895a | 1360 | suppress_local_fixups is true if an ACL has obeyed "control = |
f4ee74ac PP |
1361 | suppress_local_fixups" or -G was passed on the command-line. |
1362 | The flag smtp_input is true if the message is to be | |
8800895a PH |
1363 | handled using SMTP conventions about termination and lines starting with dots. |
1364 | For non-SMTP messages, dot_ends is true for dot-terminated messages. | |
059ec3d9 PH |
1365 | |
1366 | If a message was successfully read, message_id[0] will be non-zero. | |
1367 | ||
1368 | The general actions of this function are: | |
1369 | ||
1370 | . Read the headers of the message (if any) into a chain of store | |
1371 | blocks. | |
1372 | ||
1373 | . If there is a "sender:" header and the message is locally originated, | |
69358f02 PH |
1374 | throw it away, unless the caller is trusted, or unless |
1375 | active_local_sender_retain is set - which can only happen if | |
1376 | active_local_from_check is false. | |
059ec3d9 PH |
1377 | |
1378 | . If recipients are to be extracted from the message, build the | |
1379 | recipients list from the headers, removing any that were on the | |
1380 | original recipients list (unless extract_addresses_remove_arguments is | |
1381 | false), and at the same time, remove any bcc header that may be present. | |
1382 | ||
1383 | . Get the spool file for the data, sort out its unique name, open | |
1384 | and lock it (but don't give it the name yet). | |
1385 | ||
1386 | . Generate a "Message-Id" header if the message doesn't have one, for | |
1387 | locally-originated messages. | |
1388 | ||
1389 | . Generate a "Received" header. | |
1390 | ||
1391 | . Ensure the recipients list is fully qualified and rewritten if necessary. | |
1392 | ||
1393 | . If there are any rewriting rules, apply them to the sender address | |
1394 | and also to the headers. | |
1395 | ||
1396 | . If there is no from: header, generate one, for locally-generated messages | |
1397 | and messages in "submission mode" only. | |
1398 | ||
1399 | . If the sender is local, check that from: is correct, and if not, generate | |
1400 | a Sender: header, unless message comes from a trusted caller, or this | |
69358f02 | 1401 | feature is disabled by active_local_from_check being false. |
059ec3d9 PH |
1402 | |
1403 | . If there is no "date" header, generate one, for locally-originated | |
1404 | or submission mode messages only. | |
1405 | ||
1406 | . Copy the rest of the input, or up to a terminating "." if in SMTP or | |
1407 | dot_ends mode, to the data file. Leave it open, to hold the lock. | |
1408 | ||
1409 | . Write the envelope and the headers to a new file. | |
1410 | ||
1411 | . Set the name for the header file; close it. | |
1412 | ||
1413 | . Set the name for the data file; close it. | |
1414 | ||
1415 | Because this function can potentially be called many times in a single | |
1416 | SMTP connection, all store should be got by store_get(), so that it will be | |
1417 | automatically retrieved after the message is accepted. | |
1418 | ||
1419 | FUDGE: It seems that sites on the net send out messages with just LF | |
1420 | terminators, despite the warnings in the RFCs, and other MTAs handle this. So | |
1421 | we make the CRs optional in all cases. | |
1422 | ||
1423 | July 2003: Bare CRs in messages, especially in header lines, cause trouble. A | |
1424 | new regime is now in place in which bare CRs in header lines are turned into LF | |
1425 | followed by a space, so as not to terminate the header line. | |
1426 | ||
1427 | February 2004: A bare LF in a header line in a message whose first line was | |
1428 | terminated by CRLF is treated in the same way as a bare CR. | |
1429 | ||
1430 | Arguments: | |
1431 | extract_recip TRUE if recipients are to be extracted from the message's | |
1432 | headers | |
1433 | ||
1434 | Returns: TRUE there are more messages to be read (SMTP input) | |
1435 | FALSE there are no more messages to be read (non-SMTP input | |
1436 | or SMTP connection collapsed, or other failure) | |
1437 | ||
1438 | When reading a message for filter testing, the returned value indicates | |
1439 | whether the headers (which is all that is read) were terminated by '.' or | |
1440 | not. */ | |
1441 | ||
1442 | BOOL | |
1443 | receive_msg(BOOL extract_recip) | |
1444 | { | |
7156b1ef NM |
1445 | int i; |
1446 | int rc = FAIL; | |
059ec3d9 PH |
1447 | int msg_size = 0; |
1448 | int process_info_len = Ustrlen(process_info); | |
1449 | int error_rc = (error_handling == ERRORS_SENDER)? | |
1450 | errors_sender_rc : EXIT_FAILURE; | |
1451 | int header_size = 256; | |
1452 | int start, end, domain, size, sptr; | |
1453 | int id_resolution; | |
1454 | int had_zero = 0; | |
d677b2f2 | 1455 | int prevlines_length = 0; |
059ec3d9 PH |
1456 | |
1457 | register int ptr = 0; | |
1458 | ||
1459 | BOOL contains_resent_headers = FALSE; | |
1460 | BOOL extracted_ignored = FALSE; | |
1461 | BOOL first_line_ended_crlf = TRUE_UNSET; | |
1462 | BOOL smtp_yield = TRUE; | |
1463 | BOOL yield = FALSE; | |
1464 | ||
1465 | BOOL resents_exist = FALSE; | |
1466 | uschar *resent_prefix = US""; | |
1467 | uschar *blackholed_by = NULL; | |
04f7d5b9 | 1468 | uschar *blackhole_log_msg = US""; |
c5430c20 | 1469 | enum {NOT_TRIED, TMP_REJ, PERM_REJ, ACCEPTED} cutthrough_done = NOT_TRIED; |
059ec3d9 PH |
1470 | |
1471 | flock_t lock_data; | |
1472 | error_block *bad_addresses = NULL; | |
1473 | ||
1474 | uschar *frozen_by = NULL; | |
1475 | uschar *queued_by = NULL; | |
1476 | ||
1477 | uschar *errmsg, *s; | |
1478 | struct stat statbuf; | |
1479 | ||
4e88a19f | 1480 | /* Final message to give to SMTP caller, and messages from ACLs */ |
059ec3d9 PH |
1481 | |
1482 | uschar *smtp_reply = NULL; | |
4e88a19f | 1483 | uschar *user_msg, *log_msg; |
059ec3d9 PH |
1484 | |
1485 | /* Working header pointers */ | |
1486 | ||
1487 | header_line *h, *next; | |
1488 | ||
2cbb4081 | 1489 | /* Flags for noting the existence of certain headers (only one left) */ |
059ec3d9 PH |
1490 | |
1491 | BOOL date_header_exists = FALSE; | |
1492 | ||
1493 | /* Pointers to receive the addresses of headers whose contents we need. */ | |
1494 | ||
1495 | header_line *from_header = NULL; | |
1496 | header_line *subject_header = NULL; | |
1497 | header_line *msgid_header = NULL; | |
1498 | header_line *received_header; | |
1499 | ||
4840604e TL |
1500 | #ifdef EXPERIMENTAL_DMARC |
1501 | int dmarc_up = 0; | |
1502 | #endif /* EXPERIMENTAL_DMARC */ | |
1503 | ||
059ec3d9 PH |
1504 | /* Variables for use when building the Received: header. */ |
1505 | ||
059ec3d9 PH |
1506 | uschar *timestamp; |
1507 | int tslen; | |
1508 | ||
1509 | /* Release any open files that might have been cached while preparing to | |
1510 | accept the message - e.g. by verifying addresses - because reading a message | |
1511 | might take a fair bit of real time. */ | |
1512 | ||
1513 | search_tidyup(); | |
1514 | ||
e4bdf652 JH |
1515 | /* Extracting the recipient list from an input file is incompatible with |
1516 | cutthrough delivery with the no-spool option. It shouldn't be possible | |
817d9f57 | 1517 | to set up the combination, but just in case kill any ongoing connection. */ |
e4bdf652 | 1518 | if (extract_recip || !smtp_input) |
2e5b33cd | 1519 | cancel_cutthrough_connection("not smtp input"); |
e4bdf652 | 1520 | |
059ec3d9 PH |
1521 | /* Initialize the chain of headers by setting up a place-holder for Received: |
1522 | header. Temporarily mark it as "old", i.e. not to be used. We keep header_last | |
1523 | pointing to the end of the chain to make adding headers simple. */ | |
1524 | ||
1525 | received_header = header_list = header_last = store_get(sizeof(header_line)); | |
1526 | header_list->next = NULL; | |
1527 | header_list->type = htype_old; | |
1528 | header_list->text = NULL; | |
1529 | header_list->slen = 0; | |
1530 | ||
1531 | /* Control block for the next header to be read. */ | |
1532 | ||
1533 | next = store_get(sizeof(header_line)); | |
1534 | next->text = store_get(header_size); | |
1535 | ||
1536 | /* Initialize message id to be null (indicating no message read), and the | |
1537 | header names list to be the normal list. Indicate there is no data file open | |
1538 | yet, initialize the size and warning count, and deal with no size limit. */ | |
1539 | ||
1540 | message_id[0] = 0; | |
1541 | data_file = NULL; | |
1542 | data_fd = -1; | |
1543 | spool_name[0] = 0; | |
1544 | message_size = 0; | |
1545 | warning_count = 0; | |
d677b2f2 | 1546 | received_count = 1; /* For the one we will add */ |
059ec3d9 PH |
1547 | |
1548 | if (thismessage_size_limit <= 0) thismessage_size_limit = INT_MAX; | |
1549 | ||
2e0c1448 | 1550 | /* While reading the message, the following counts are computed. */ |
059ec3d9 | 1551 | |
d677b2f2 PH |
1552 | message_linecount = body_linecount = body_zerocount = |
1553 | max_received_linelength = 0; | |
059ec3d9 | 1554 | |
80a47a2c TK |
1555 | #ifndef DISABLE_DKIM |
1556 | /* Call into DKIM to set up the context. */ | |
1557 | if (smtp_input && !smtp_batched_input && !dkim_disable_verify) dkim_exim_verify_init(); | |
fb2274d4 TK |
1558 | #endif |
1559 | ||
4840604e TL |
1560 | #ifdef EXPERIMENTAL_DMARC |
1561 | /* initialize libopendmarc */ | |
1562 | dmarc_up = dmarc_init(); | |
1563 | #endif | |
1564 | ||
059ec3d9 PH |
1565 | /* Remember the time of reception. Exim uses time+pid for uniqueness of message |
1566 | ids, and fractions of a second are required. See the comments that precede the | |
1567 | message id creation below. */ | |
1568 | ||
1569 | (void)gettimeofday(&message_id_tv, NULL); | |
1570 | ||
1571 | /* For other uses of the received time we can operate with granularity of one | |
1572 | second, and for that we use the global variable received_time. This is for | |
1573 | things like ultimate message timeouts. */ | |
1574 | ||
1575 | received_time = message_id_tv.tv_sec; | |
1576 | ||
1577 | /* If SMTP input, set the special handler for timeouts. The alarm() calls | |
1578 | happen in the smtp_getc() function when it refills its buffer. */ | |
1579 | ||
1580 | if (smtp_input) os_non_restarting_signal(SIGALRM, data_timeout_handler); | |
1581 | ||
1582 | /* If not SMTP input, timeout happens only if configured, and we just set a | |
1583 | single timeout for the whole message. */ | |
1584 | ||
1585 | else if (receive_timeout > 0) | |
1586 | { | |
1587 | os_non_restarting_signal(SIGALRM, data_timeout_handler); | |
1588 | alarm(receive_timeout); | |
1589 | } | |
1590 | ||
1591 | /* SIGTERM and SIGINT are caught always. */ | |
1592 | ||
1593 | signal(SIGTERM, data_sigterm_sigint_handler); | |
1594 | signal(SIGINT, data_sigterm_sigint_handler); | |
1595 | ||
1596 | /* Header lines in messages are not supposed to be very long, though when | |
1597 | unfolded, to: and cc: headers can take up a lot of store. We must also cope | |
1598 | with the possibility of junk being thrown at us. Start by getting 256 bytes for | |
1599 | storing the header, and extend this as necessary using string_cat(). | |
1600 | ||
1601 | To cope with total lunacies, impose an upper limit on the length of the header | |
1602 | section of the message, as otherwise the store will fill up. We must also cope | |
1603 | with the possibility of binary zeros in the data. Hence we cannot use fgets(). | |
1604 | Folded header lines are joined into one string, leaving the '\n' characters | |
1605 | inside them, so that writing them out reproduces the input. | |
1606 | ||
1607 | Loop for each character of each header; the next structure for chaining the | |
1608 | header is set up already, with ptr the offset of the next character in | |
1609 | next->text. */ | |
1610 | ||
1611 | for (;;) | |
1612 | { | |
80a47a2c | 1613 | int ch = (receive_getc)(); |
059ec3d9 PH |
1614 | |
1615 | /* If we hit EOF on a SMTP connection, it's an error, since incoming | |
1616 | SMTP must have a correct "." terminator. */ | |
1617 | ||
1618 | if (ch == EOF && smtp_input /* && !smtp_batched_input */) | |
1619 | { | |
1620 | smtp_reply = handle_lost_connection(US" (header)"); | |
1621 | smtp_yield = FALSE; | |
1622 | goto TIDYUP; /* Skip to end of function */ | |
1623 | } | |
1624 | ||
1625 | /* See if we are at the current header's size limit - there must be at least | |
1626 | four bytes left. This allows for the new character plus a zero, plus two for | |
1627 | extra insertions when we are playing games with dots and carriage returns. If | |
1628 | we are at the limit, extend the text buffer. This could have been done | |
1629 | automatically using string_cat() but because this is a tightish loop storing | |
1630 | only one character at a time, we choose to do it inline. Normally | |
1631 | store_extend() will be able to extend the block; only at the end of a big | |
1632 | store block will a copy be needed. To handle the case of very long headers | |
1633 | (and sometimes lunatic messages can have ones that are 100s of K long) we | |
1634 | call store_release() for strings that have been copied - if the string is at | |
1635 | the start of a block (and therefore the only thing in it, because we aren't | |
1636 | doing any other gets), the block gets freed. We can only do this because we | |
1637 | know there are no other calls to store_get() going on. */ | |
1638 | ||
1639 | if (ptr >= header_size - 4) | |
1640 | { | |
1641 | int oldsize = header_size; | |
1642 | /* header_size += 256; */ | |
1643 | header_size *= 2; | |
1644 | if (!store_extend(next->text, oldsize, header_size)) | |
1645 | { | |
1646 | uschar *newtext = store_get(header_size); | |
1647 | memcpy(newtext, next->text, ptr); | |
1648 | store_release(next->text); | |
1649 | next->text = newtext; | |
1650 | } | |
1651 | } | |
1652 | ||
1653 | /* Cope with receiving a binary zero. There is dispute about whether | |
1654 | these should be allowed in RFC 822 messages. The middle view is that they | |
1655 | should not be allowed in headers, at least. Exim takes this attitude at | |
1656 | the moment. We can't just stomp on them here, because we don't know that | |
1657 | this line is a header yet. Set a flag to cause scanning later. */ | |
1658 | ||
1659 | if (ch == 0) had_zero++; | |
1660 | ||
1661 | /* Test for termination. Lines in remote SMTP are terminated by CRLF, while | |
1662 | those from data files use just LF. Treat LF in local SMTP input as a | |
1663 | terminator too. Treat EOF as a line terminator always. */ | |
1664 | ||
1665 | if (ch == EOF) goto EOL; | |
1666 | ||
1667 | /* FUDGE: There are sites out there that don't send CRs before their LFs, and | |
1668 | other MTAs accept this. We are therefore forced into this "liberalisation" | |
1669 | too, so we accept LF as a line terminator whatever the source of the message. | |
1670 | However, if the first line of the message ended with a CRLF, we treat a bare | |
1671 | LF specially by inserting a white space after it to ensure that the header | |
1672 | line is not terminated. */ | |
1673 | ||
1674 | if (ch == '\n') | |
1675 | { | |
1676 | if (first_line_ended_crlf == TRUE_UNSET) first_line_ended_crlf = FALSE; | |
80a47a2c | 1677 | else if (first_line_ended_crlf) receive_ungetc(' '); |
059ec3d9 PH |
1678 | goto EOL; |
1679 | } | |
1680 | ||
1681 | /* This is not the end of the line. If this is SMTP input and this is | |
1682 | the first character in the line and it is a "." character, ignore it. | |
1683 | This implements the dot-doubling rule, though header lines starting with | |
1684 | dots aren't exactly common. They are legal in RFC 822, though. If the | |
1685 | following is CRLF or LF, this is the line that that terminates the | |
1686 | entire message. We set message_ended to indicate this has happened (to | |
1687 | prevent further reading), and break out of the loop, having freed the | |
1688 | empty header, and set next = NULL to indicate no data line. */ | |
1689 | ||
1690 | if (ptr == 0 && ch == '.' && (smtp_input || dot_ends)) | |
1691 | { | |
80a47a2c | 1692 | ch = (receive_getc)(); |
059ec3d9 PH |
1693 | if (ch == '\r') |
1694 | { | |
80a47a2c | 1695 | ch = (receive_getc)(); |
059ec3d9 PH |
1696 | if (ch != '\n') |
1697 | { | |
80a47a2c | 1698 | receive_ungetc(ch); |
059ec3d9 PH |
1699 | ch = '\r'; /* Revert to CR */ |
1700 | } | |
1701 | } | |
1702 | if (ch == '\n') | |
1703 | { | |
1704 | message_ended = END_DOT; | |
1705 | store_reset(next); | |
1706 | next = NULL; | |
1707 | break; /* End character-reading loop */ | |
1708 | } | |
1709 | ||
1710 | /* For non-SMTP input, the dot at the start of the line was really a data | |
1711 | character. What is now in ch is the following character. We guaranteed | |
1712 | enough space for this above. */ | |
1713 | ||
1714 | if (!smtp_input) | |
1715 | { | |
1716 | next->text[ptr++] = '.'; | |
1717 | message_size++; | |
1718 | } | |
1719 | } | |
1720 | ||
1721 | /* If CR is immediately followed by LF, end the line, ignoring the CR, and | |
1722 | remember this case if this is the first line ending. */ | |
1723 | ||
1724 | if (ch == '\r') | |
1725 | { | |
80a47a2c | 1726 | ch = (receive_getc)(); |
059ec3d9 PH |
1727 | if (ch == '\n') |
1728 | { | |
1729 | if (first_line_ended_crlf == TRUE_UNSET) first_line_ended_crlf = TRUE; | |
1730 | goto EOL; | |
1731 | } | |
1732 | ||
1733 | /* Otherwise, put back the character after CR, and turn the bare CR | |
1734 | into LF SP. */ | |
1735 | ||
80a47a2c | 1736 | ch = (receive_ungetc)(ch); |
059ec3d9 PH |
1737 | next->text[ptr++] = '\n'; |
1738 | message_size++; | |
1739 | ch = ' '; | |
1740 | } | |
1741 | ||
1742 | /* We have a data character for the header line. */ | |
1743 | ||
1744 | next->text[ptr++] = ch; /* Add to buffer */ | |
1745 | message_size++; /* Total message size so far */ | |
1746 | ||
1747 | /* Handle failure due to a humungously long header section. The >= allows | |
1748 | for the terminating \n. Add what we have so far onto the headers list so | |
1749 | that it gets reflected in any error message, and back up the just-read | |
1750 | character. */ | |
1751 | ||
1752 | if (message_size >= header_maxsize) | |
1753 | { | |
1754 | next->text[ptr] = 0; | |
1755 | next->slen = ptr; | |
1756 | next->type = htype_other; | |
1757 | next->next = NULL; | |
1758 | header_last->next = next; | |
1759 | header_last = next; | |
1760 | ||
1761 | log_write(0, LOG_MAIN, "ridiculously long message header received from " | |
1762 | "%s (more than %d characters): message abandoned", | |
1763 | sender_host_unknown? sender_ident : sender_fullhost, header_maxsize); | |
1764 | ||
1765 | if (smtp_input) | |
1766 | { | |
1767 | smtp_reply = US"552 Message header is ridiculously long"; | |
1768 | receive_swallow_smtp(); | |
1769 | goto TIDYUP; /* Skip to end of function */ | |
1770 | } | |
1771 | ||
1772 | else | |
1773 | { | |
1774 | give_local_error(ERRMESS_VLONGHEADER, | |
1775 | string_sprintf("message header longer than %d characters received: " | |
1776 | "message not accepted", header_maxsize), US"", error_rc, stdin, | |
1777 | header_list->next); | |
1778 | /* Does not return */ | |
1779 | } | |
1780 | } | |
1781 | ||
1782 | continue; /* With next input character */ | |
1783 | ||
1784 | /* End of header line reached */ | |
1785 | ||
1786 | EOL: | |
2e0c1448 PH |
1787 | |
1788 | /* Keep track of lines for BSMTP errors and overall message_linecount. */ | |
1789 | ||
1790 | receive_linecount++; | |
1791 | message_linecount++; | |
059ec3d9 | 1792 | |
d677b2f2 PH |
1793 | /* Keep track of maximum line length */ |
1794 | ||
1795 | if (ptr - prevlines_length > max_received_linelength) | |
1796 | max_received_linelength = ptr - prevlines_length; | |
1797 | prevlines_length = ptr + 1; | |
1798 | ||
059ec3d9 PH |
1799 | /* Now put in the terminating newline. There is always space for |
1800 | at least two more characters. */ | |
1801 | ||
1802 | next->text[ptr++] = '\n'; | |
1803 | message_size++; | |
1804 | ||
1805 | /* A blank line signals the end of the headers; release the unwanted | |
1806 | space and set next to NULL to indicate this. */ | |
1807 | ||
1808 | if (ptr == 1) | |
1809 | { | |
1810 | store_reset(next); | |
1811 | next = NULL; | |
1812 | break; | |
1813 | } | |
1814 | ||
1815 | /* There is data in the line; see if the next input character is a | |
1816 | whitespace character. If it is, we have a continuation of this header line. | |
1817 | There is always space for at least one character at this point. */ | |
1818 | ||
1819 | if (ch != EOF) | |
1820 | { | |
80a47a2c | 1821 | int nextch = (receive_getc)(); |
059ec3d9 PH |
1822 | if (nextch == ' ' || nextch == '\t') |
1823 | { | |
1824 | next->text[ptr++] = nextch; | |
1825 | message_size++; | |
1826 | continue; /* Iterate the loop */ | |
1827 | } | |
80a47a2c | 1828 | else if (nextch != EOF) (receive_ungetc)(nextch); /* For next time */ |
059ec3d9 PH |
1829 | else ch = EOF; /* Cause main loop to exit at end */ |
1830 | } | |
1831 | ||
1832 | /* We have got to the real line end. Terminate the string and release store | |
1833 | beyond it. If it turns out to be a real header, internal binary zeros will | |
1834 | be squashed later. */ | |
1835 | ||
1836 | next->text[ptr] = 0; | |
1837 | next->slen = ptr; | |
1838 | store_reset(next->text + ptr + 1); | |
1839 | ||
1840 | /* Check the running total size against the overall message size limit. We | |
1841 | don't expect to fail here, but if the overall limit is set less than MESSAGE_ | |
1842 | MAXSIZE and a big header is sent, we want to catch it. Just stop reading | |
1843 | headers - the code to read the body will then also hit the buffer. */ | |
1844 | ||
1845 | if (message_size > thismessage_size_limit) break; | |
1846 | ||
1847 | /* A line that is not syntactically correct for a header also marks | |
1848 | the end of the headers. In this case, we leave next containing the | |
1849 | first data line. This might actually be several lines because of the | |
1850 | continuation logic applied above, but that doesn't matter. | |
1851 | ||
1852 | It turns out that smail, and presumably sendmail, accept leading lines | |
1853 | of the form | |
1854 | ||
1855 | From ph10 Fri Jan 5 12:35 GMT 1996 | |
1856 | ||
1857 | in messages. The "mail" command on Solaris 2 sends such lines. I cannot | |
1858 | find any documentation of this, but for compatibility it had better be | |
1859 | accepted. Exim restricts it to the case of non-smtp messages, and | |
1860 | treats it as an alternative to the -f command line option. Thus it is | |
1861 | ignored except for trusted users or filter testing. Otherwise it is taken | |
1862 | as the sender address, unless -f was used (sendmail compatibility). | |
1863 | ||
1864 | It further turns out that some UUCPs generate the From_line in a different | |
1865 | format, e.g. | |
1866 | ||
1867 | From ph10 Fri, 7 Jan 97 14:00:00 GMT | |
1868 | ||
1869 | The regex for matching these things is now capable of recognizing both | |
1870 | formats (including 2- and 4-digit years in the latter). In fact, the regex | |
1871 | is now configurable, as is the expansion string to fish out the sender. | |
1872 | ||
1873 | Even further on it has been discovered that some broken clients send | |
1874 | these lines in SMTP messages. There is now an option to ignore them from | |
1875 | specified hosts or networks. Sigh. */ | |
1876 | ||
1877 | if (header_last == header_list && | |
1878 | (!smtp_input | |
1879 | || | |
1880 | (sender_host_address != NULL && | |
1881 | verify_check_host(&ignore_fromline_hosts) == OK) | |
1882 | || | |
1883 | (sender_host_address == NULL && ignore_fromline_local) | |
1884 | ) && | |
1885 | regex_match_and_setup(regex_From, next->text, 0, -1)) | |
1886 | { | |
1887 | if (!sender_address_forced) | |
1888 | { | |
1889 | uschar *uucp_sender = expand_string(uucp_from_sender); | |
1890 | if (uucp_sender == NULL) | |
1891 | { | |
1892 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1893 | "expansion of \"%s\" failed after matching " | |
1894 | "\"From \" line: %s", uucp_from_sender, expand_string_message); | |
1895 | } | |
1896 | else | |
1897 | { | |
1898 | int start, end, domain; | |
1899 | uschar *errmess; | |
1900 | uschar *newsender = parse_extract_address(uucp_sender, &errmess, | |
1901 | &start, &end, &domain, TRUE); | |
1902 | if (newsender != NULL) | |
1903 | { | |
1904 | if (domain == 0 && newsender[0] != 0) | |
1905 | newsender = rewrite_address_qualify(newsender, FALSE); | |
1906 | ||
f05da2e8 | 1907 | if (filter_test != FTEST_NONE || receive_check_set_sender(newsender)) |
059ec3d9 PH |
1908 | { |
1909 | sender_address = newsender; | |
1910 | ||
f05da2e8 | 1911 | if (trusted_caller || filter_test != FTEST_NONE) |
059ec3d9 PH |
1912 | { |
1913 | authenticated_sender = NULL; | |
1914 | originator_name = US""; | |
1915 | sender_local = FALSE; | |
1916 | } | |
1917 | ||
f05da2e8 | 1918 | if (filter_test != FTEST_NONE) |
059ec3d9 PH |
1919 | printf("Sender taken from \"From \" line\n"); |
1920 | } | |
1921 | } | |
1922 | } | |
1923 | } | |
1924 | } | |
1925 | ||
1926 | /* Not a leading "From " line. Check to see if it is a valid header line. | |
1927 | Header names may contain any non-control characters except space and colon, | |
1928 | amazingly. */ | |
1929 | ||
1930 | else | |
1931 | { | |
1932 | uschar *p = next->text; | |
1933 | ||
1934 | /* If not a valid header line, break from the header reading loop, leaving | |
1935 | next != NULL, indicating that it holds the first line of the body. */ | |
1936 | ||
1937 | if (isspace(*p)) break; | |
1938 | while (mac_isgraph(*p) && *p != ':') p++; | |
1939 | while (isspace(*p)) p++; | |
1940 | if (*p != ':') | |
1941 | { | |
1942 | body_zerocount = had_zero; | |
1943 | break; | |
1944 | } | |
1945 | ||
1946 | /* We have a valid header line. If there were any binary zeroes in | |
1947 | the line, stomp on them here. */ | |
1948 | ||
1949 | if (had_zero > 0) | |
1950 | for (p = next->text; p < next->text + ptr; p++) if (*p == 0) *p = '?'; | |
1951 | ||
1952 | /* It is perfectly legal to have an empty continuation line | |
1953 | at the end of a header, but it is confusing to humans | |
1954 | looking at such messages, since it looks like a blank line. | |
1955 | Reduce confusion by removing redundant white space at the | |
1956 | end. We know that there is at least one printing character | |
1957 | (the ':' tested for above) so there is no danger of running | |
1958 | off the end. */ | |
1959 | ||
1960 | p = next->text + ptr - 2; | |
1961 | for (;;) | |
1962 | { | |
1963 | while (*p == ' ' || *p == '\t') p--; | |
1964 | if (*p != '\n') break; | |
1965 | ptr = (p--) - next->text + 1; | |
1966 | message_size -= next->slen - ptr; | |
1967 | next->text[ptr] = 0; | |
1968 | next->slen = ptr; | |
1969 | } | |
1970 | ||
1971 | /* Add the header to the chain */ | |
1972 | ||
1973 | next->type = htype_other; | |
1974 | next->next = NULL; | |
1975 | header_last->next = next; | |
1976 | header_last = next; | |
1977 | ||
1978 | /* Check the limit for individual line lengths. This comes after adding to | |
1979 | the chain so that the failing line is reflected if a bounce is generated | |
1980 | (for a local message). */ | |
1981 | ||
1982 | if (header_line_maxsize > 0 && next->slen > header_line_maxsize) | |
1983 | { | |
1984 | log_write(0, LOG_MAIN, "overlong message header line received from " | |
1985 | "%s (more than %d characters): message abandoned", | |
1986 | sender_host_unknown? sender_ident : sender_fullhost, | |
1987 | header_line_maxsize); | |
1988 | ||
1989 | if (smtp_input) | |
1990 | { | |
1991 | smtp_reply = US"552 A message header line is too long"; | |
1992 | receive_swallow_smtp(); | |
1993 | goto TIDYUP; /* Skip to end of function */ | |
1994 | } | |
1995 | ||
1996 | else | |
1997 | { | |
1998 | give_local_error(ERRMESS_VLONGHDRLINE, | |
1999 | string_sprintf("message header line longer than %d characters " | |
2000 | "received: message not accepted", header_line_maxsize), US"", | |
2001 | error_rc, stdin, header_list->next); | |
2002 | /* Does not return */ | |
2003 | } | |
2004 | } | |
2005 | ||
2006 | /* Note if any resent- fields exist. */ | |
2007 | ||
2008 | if (!resents_exist && strncmpic(next->text, US"resent-", 7) == 0) | |
2009 | { | |
2010 | resents_exist = TRUE; | |
2011 | resent_prefix = US"Resent-"; | |
2012 | } | |
2013 | } | |
2014 | ||
2015 | /* The line has been handled. If we have hit EOF, break out of the loop, | |
2016 | indicating no pending data line. */ | |
2017 | ||
2018 | if (ch == EOF) { next = NULL; break; } | |
2019 | ||
2020 | /* Set up for the next header */ | |
2021 | ||
2022 | header_size = 256; | |
2023 | next = store_get(sizeof(header_line)); | |
2024 | next->text = store_get(header_size); | |
2025 | ptr = 0; | |
2026 | had_zero = 0; | |
d677b2f2 | 2027 | prevlines_length = 0; |
059ec3d9 PH |
2028 | } /* Continue, starting to read the next header */ |
2029 | ||
2030 | /* At this point, we have read all the headers into a data structure in main | |
2031 | store. The first header is still the dummy placeholder for the Received: header | |
2032 | we are going to generate a bit later on. If next != NULL, it contains the first | |
2033 | data line - which terminated the headers before reaching a blank line (not the | |
2034 | normal case). */ | |
2035 | ||
2036 | DEBUG(D_receive) | |
2037 | { | |
2038 | debug_printf(">>Headers received:\n"); | |
2039 | for (h = header_list->next; h != NULL; h = h->next) | |
2040 | debug_printf("%s", h->text); | |
2041 | debug_printf("\n"); | |
2042 | } | |
2043 | ||
2044 | /* End of file on any SMTP connection is an error. If an incoming SMTP call | |
2045 | is dropped immediately after valid headers, the next thing we will see is EOF. | |
2046 | We must test for this specially, as further down the reading of the data is | |
2047 | skipped if already at EOF. */ | |
2048 | ||
2049 | if (smtp_input && (receive_feof)()) | |
2050 | { | |
2051 | smtp_reply = handle_lost_connection(US" (after header)"); | |
2052 | smtp_yield = FALSE; | |
2053 | goto TIDYUP; /* Skip to end of function */ | |
2054 | } | |
2055 | ||
2056 | /* If this is a filter test run and no headers were read, output a warning | |
2057 | in case there is a mistake in the test message. */ | |
2058 | ||
f05da2e8 | 2059 | if (filter_test != FTEST_NONE && header_list->next == NULL) |
059ec3d9 PH |
2060 | printf("Warning: no message headers read\n"); |
2061 | ||
2062 | ||
2063 | /* Scan the headers to identify them. Some are merely marked for later | |
2064 | processing; some are dealt with here. */ | |
2065 | ||
2066 | for (h = header_list->next; h != NULL; h = h->next) | |
2067 | { | |
2068 | BOOL is_resent = strncmpic(h->text, US"resent-", 7) == 0; | |
2069 | if (is_resent) contains_resent_headers = TRUE; | |
2070 | ||
2071 | switch (header_checkname(h, is_resent)) | |
2072 | { | |
059ec3d9 | 2073 | case htype_bcc: |
2cbb4081 | 2074 | h->type = htype_bcc; /* Both Bcc: and Resent-Bcc: */ |
059ec3d9 PH |
2075 | break; |
2076 | ||
059ec3d9 | 2077 | case htype_cc: |
2cbb4081 | 2078 | h->type = htype_cc; /* Both Cc: and Resent-Cc: */ |
059ec3d9 PH |
2079 | break; |
2080 | ||
2081 | /* Record whether a Date: or Resent-Date: header exists, as appropriate. */ | |
2082 | ||
2083 | case htype_date: | |
4c69d561 | 2084 | if (!resents_exist || is_resent) date_header_exists = TRUE; |
059ec3d9 PH |
2085 | break; |
2086 | ||
2087 | /* Same comments as about Return-Path: below. */ | |
2088 | ||
2089 | case htype_delivery_date: | |
2090 | if (delivery_date_remove) h->type = htype_old; | |
2091 | break; | |
2092 | ||
2093 | /* Same comments as about Return-Path: below. */ | |
2094 | ||
2095 | case htype_envelope_to: | |
2096 | if (envelope_to_remove) h->type = htype_old; | |
2097 | break; | |
2098 | ||
2099 | /* Mark all "From:" headers so they get rewritten. Save the one that is to | |
2100 | be used for Sender: checking. For Sendmail compatibility, if the "From:" | |
2101 | header consists of just the login id of the user who called Exim, rewrite | |
2102 | it with the gecos field first. Apply this rule to Resent-From: if there | |
2103 | are resent- fields. */ | |
2104 | ||
2105 | case htype_from: | |
2106 | h->type = htype_from; | |
2107 | if (!resents_exist || is_resent) | |
2108 | { | |
2109 | from_header = h; | |
2110 | if (!smtp_input) | |
2111 | { | |
5de8faa3 | 2112 | int len; |
059ec3d9 PH |
2113 | uschar *s = Ustrchr(h->text, ':') + 1; |
2114 | while (isspace(*s)) s++; | |
5de8faa3 | 2115 | len = h->slen - (s - h->text) - 1; |
e0fccd1d TF |
2116 | if (Ustrlen(originator_login) == len && |
2117 | strncmpic(s, originator_login, len) == 0) | |
059ec3d9 PH |
2118 | { |
2119 | uschar *name = is_resent? US"Resent-From" : US"From"; | |
2120 | header_add(htype_from, "%s: %s <%s@%s>\n", name, originator_name, | |
2121 | originator_login, qualify_domain_sender); | |
2122 | from_header = header_last; | |
2123 | h->type = htype_old; | |
2124 | DEBUG(D_receive|D_rewrite) | |
2125 | debug_printf("rewrote \"%s:\" header using gecos\n", name); | |
2126 | } | |
2127 | } | |
2128 | } | |
2129 | break; | |
2130 | ||
2131 | /* Identify the Message-id: header for generating "in-reply-to" in the | |
2132 | autoreply transport. For incoming logging, save any resent- value. In both | |
2133 | cases, take just the first of any multiples. */ | |
2134 | ||
2135 | case htype_id: | |
2136 | if (msgid_header == NULL && (!resents_exist || is_resent)) | |
2137 | { | |
2138 | msgid_header = h; | |
2139 | h->type = htype_id; | |
2140 | } | |
2141 | break; | |
2142 | ||
2143 | /* Flag all Received: headers */ | |
2144 | ||
2145 | case htype_received: | |
2146 | h->type = htype_received; | |
2147 | received_count++; | |
2148 | break; | |
2149 | ||
2150 | /* "Reply-to:" is just noted (there is no resent-reply-to field) */ | |
2151 | ||
2152 | case htype_reply_to: | |
2153 | h->type = htype_reply_to; | |
2154 | break; | |
2155 | ||
2156 | /* The Return-path: header is supposed to be added to messages when | |
2157 | they leave the SMTP system. We shouldn't receive messages that already | |
2158 | contain Return-path. However, since Exim generates Return-path: on | |
2159 | local delivery, resent messages may well contain it. We therefore | |
2160 | provide an option (which defaults on) to remove any Return-path: headers | |
2161 | on input. Removal actually means flagging as "old", which prevents the | |
2162 | header being transmitted with the message. */ | |
2163 | ||
2164 | case htype_return_path: | |
2165 | if (return_path_remove) h->type = htype_old; | |
2166 | ||
2167 | /* If we are testing a mail filter file, use the value of the | |
2168 | Return-Path: header to set up the return_path variable, which is not | |
2169 | otherwise set. However, remove any <> that surround the address | |
2170 | because the variable doesn't have these. */ | |
2171 | ||
f05da2e8 | 2172 | if (filter_test != FTEST_NONE) |
059ec3d9 PH |
2173 | { |
2174 | uschar *start = h->text + 12; | |
2175 | uschar *end = start + Ustrlen(start); | |
2176 | while (isspace(*start)) start++; | |
2177 | while (end > start && isspace(end[-1])) end--; | |
2178 | if (*start == '<' && end[-1] == '>') | |
2179 | { | |
2180 | start++; | |
2181 | end--; | |
2182 | } | |
2183 | return_path = string_copyn(start, end - start); | |
2184 | printf("Return-path taken from \"Return-path:\" header line\n"); | |
2185 | } | |
2186 | break; | |
2187 | ||
2188 | /* If there is a "Sender:" header and the message is locally originated, | |
8800895a PH |
2189 | and from an untrusted caller and suppress_local_fixups is not set, or if we |
2190 | are in submission mode for a remote message, mark it "old" so that it will | |
2191 | not be transmitted with the message, unless active_local_sender_retain is | |
2192 | set. (This can only be true if active_local_from_check is false.) If there | |
2193 | are any resent- headers in the message, apply this rule to Resent-Sender: | |
2194 | instead of Sender:. Messages with multiple resent- header sets cannot be | |
2195 | tidily handled. (For this reason, at least one MUA - Pine - turns old | |
2196 | resent- headers into X-resent- headers when resending, leaving just one | |
2197 | set.) */ | |
059ec3d9 PH |
2198 | |
2199 | case htype_sender: | |
69358f02 | 2200 | h->type = ((!active_local_sender_retain && |
8800895a PH |
2201 | ( |
2202 | (sender_local && !trusted_caller && !suppress_local_fixups) | |
2203 | || submission_mode | |
2204 | ) | |
059ec3d9 PH |
2205 | ) && |
2206 | (!resents_exist||is_resent))? | |
2207 | htype_old : htype_sender; | |
2208 | break; | |
2209 | ||
2210 | /* Remember the Subject: header for logging. There is no Resent-Subject */ | |
2211 | ||
2212 | case htype_subject: | |
2213 | subject_header = h; | |
2214 | break; | |
2215 | ||
2216 | /* "To:" gets flagged, and the existence of a recipient header is noted, | |
2217 | whether it's resent- or not. */ | |
2218 | ||
2219 | case htype_to: | |
2220 | h->type = htype_to; | |
2221 | /**** | |
2222 | to_or_cc_header_exists = TRUE; | |
2223 | ****/ | |
2224 | break; | |
2225 | } | |
2226 | } | |
2227 | ||
2228 | /* Extract recipients from the headers if that is required (the -t option). | |
2229 | Note that this is documented as being done *before* any address rewriting takes | |
2230 | place. There are two possibilities: | |
2231 | ||
2232 | (1) According to sendmail documentation for Solaris, IRIX, and HP-UX, any | |
2233 | recipients already listed are to be REMOVED from the message. Smail 3 works | |
2234 | like this. We need to build a non-recipients tree for that list, because in | |
2235 | subsequent processing this data is held in a tree and that's what the | |
2236 | spool_write_header() function expects. Make sure that non-recipient addresses | |
2237 | are fully qualified and rewritten if necessary. | |
2238 | ||
2239 | (2) According to other sendmail documentation, -t ADDS extracted recipients to | |
2240 | those in the command line arguments (and it is rumoured some other MTAs do | |
2241 | this). Therefore, there is an option to make Exim behave this way. | |
2242 | ||
2243 | *** Notes on "Resent-" header lines *** | |
2244 | ||
2245 | The presence of resent-headers in the message makes -t horribly ambiguous. | |
2246 | Experiments with sendmail showed that it uses recipients for all resent- | |
2247 | headers, totally ignoring the concept of "sets of resent- headers" as described | |
2248 | in RFC 2822 section 3.6.6. Sendmail also amalgamates them into a single set | |
2249 | with all the addresses in one instance of each header. | |
2250 | ||
2251 | This seems to me not to be at all sensible. Before release 4.20, Exim 4 gave an | |
2252 | error for -t if there were resent- headers in the message. However, after a | |
2253 | discussion on the mailing list, I've learned that there are MUAs that use | |
2254 | resent- headers with -t, and also that the stuff about sets of resent- headers | |
2255 | and their ordering in RFC 2822 is generally ignored. An MUA that submits a | |
2256 | message with -t and resent- header lines makes sure that only *its* resent- | |
2257 | headers are present; previous ones are often renamed as X-resent- for example. | |
2258 | ||
2259 | Consequently, Exim has been changed so that, if any resent- header lines are | |
2260 | present, the recipients are taken from all of the appropriate resent- lines, | |
2261 | and not from the ordinary To:, Cc:, etc. */ | |
2262 | ||
2263 | if (extract_recip) | |
2264 | { | |
2265 | int rcount = 0; | |
2266 | error_block **bnext = &bad_addresses; | |
2267 | ||
2268 | if (extract_addresses_remove_arguments) | |
2269 | { | |
2270 | while (recipients_count-- > 0) | |
2271 | { | |
2272 | uschar *s = rewrite_address(recipients_list[recipients_count].address, | |
2273 | TRUE, TRUE, global_rewrite_rules, rewrite_existflags); | |
2274 | tree_add_nonrecipient(s); | |
2275 | } | |
2276 | recipients_list = NULL; | |
2277 | recipients_count = recipients_list_max = 0; | |
2278 | } | |
2279 | ||
059ec3d9 PH |
2280 | /* Now scan the headers */ |
2281 | ||
2282 | for (h = header_list->next; h != NULL; h = h->next) | |
2283 | { | |
2284 | if ((h->type == htype_to || h->type == htype_cc || h->type == htype_bcc) && | |
2285 | (!contains_resent_headers || strncmpic(h->text, US"resent-", 7) == 0)) | |
2286 | { | |
2287 | uschar *s = Ustrchr(h->text, ':') + 1; | |
2288 | while (isspace(*s)) s++; | |
2289 | ||
1eccaa59 PH |
2290 | parse_allow_group = TRUE; /* Allow address group syntax */ |
2291 | ||
059ec3d9 PH |
2292 | while (*s != 0) |
2293 | { | |
2294 | uschar *ss = parse_find_address_end(s, FALSE); | |
2295 | uschar *recipient, *errmess, *p, *pp; | |
2296 | int start, end, domain; | |
2297 | ||
2298 | /* Check on maximum */ | |
2299 | ||
2300 | if (recipients_max > 0 && ++rcount > recipients_max) | |
2301 | { | |
2302 | give_local_error(ERRMESS_TOOMANYRECIP, US"too many recipients", | |
2303 | US"message rejected: ", error_rc, stdin, NULL); | |
2304 | /* Does not return */ | |
2305 | } | |
2306 | ||
2307 | /* Make a copy of the address, and remove any internal newlines. These | |
2308 | may be present as a result of continuations of the header line. The | |
2309 | white space that follows the newline must not be removed - it is part | |
2310 | of the header. */ | |
2311 | ||
2312 | pp = recipient = store_get(ss - s + 1); | |
2313 | for (p = s; p < ss; p++) if (*p != '\n') *pp++ = *p; | |
2314 | *pp = 0; | |
2315 | recipient = parse_extract_address(recipient, &errmess, &start, &end, | |
2316 | &domain, FALSE); | |
2317 | ||
2318 | /* Keep a list of all the bad addresses so we can send a single | |
2319 | error message at the end. However, an empty address is not an error; | |
2320 | just ignore it. This can come from an empty group list like | |
2321 | ||
2322 | To: Recipients of list:; | |
2323 | ||
2324 | If there are no recipients at all, an error will occur later. */ | |
2325 | ||
2326 | if (recipient == NULL && Ustrcmp(errmess, "empty address") != 0) | |
2327 | { | |
2328 | int len = Ustrlen(s); | |
2329 | error_block *b = store_get(sizeof(error_block)); | |
2330 | while (len > 0 && isspace(s[len-1])) len--; | |
2331 | b->next = NULL; | |
2332 | b->text1 = string_printing(string_copyn(s, len)); | |
2333 | b->text2 = errmess; | |
2334 | *bnext = b; | |
2335 | bnext = &(b->next); | |
2336 | } | |
2337 | ||
2338 | /* If the recipient is already in the nonrecipients tree, it must | |
2339 | have appeared on the command line with the option extract_addresses_ | |
2340 | remove_arguments set. Do not add it to the recipients, and keep a note | |
2341 | that this has happened, in order to give a better error if there are | |
2342 | no recipients left. */ | |
2343 | ||
2344 | else if (recipient != NULL) | |
2345 | { | |
2346 | if (tree_search(tree_nonrecipients, recipient) == NULL) | |
2347 | receive_add_recipient(recipient, -1); | |
2348 | else | |
2349 | extracted_ignored = TRUE; | |
2350 | } | |
2351 | ||
2352 | /* Move on past this address */ | |
2353 | ||
2354 | s = ss + (*ss? 1:0); | |
2355 | while (isspace(*s)) s++; | |
1eccaa59 PH |
2356 | } /* Next address */ |
2357 | ||
2358 | parse_allow_group = FALSE; /* Reset group syntax flags */ | |
2359 | parse_found_group = FALSE; | |
059ec3d9 PH |
2360 | |
2361 | /* If this was the bcc: header, mark it "old", which means it | |
2362 | will be kept on the spool, but not transmitted as part of the | |
2363 | message. */ | |
2364 | ||
2cbb4081 | 2365 | if (h->type == htype_bcc) h->type = htype_old; |
059ec3d9 PH |
2366 | } /* For appropriate header line */ |
2367 | } /* For each header line */ | |
2368 | ||
059ec3d9 PH |
2369 | } |
2370 | ||
2371 | /* Now build the unique message id. This has changed several times over the | |
2372 | lifetime of Exim. This description was rewritten for Exim 4.14 (February 2003). | |
2373 | Retaining all the history in the comment has become too unwieldy - read | |
2374 | previous release sources if you want it. | |
2375 | ||
2376 | The message ID has 3 parts: tttttt-pppppp-ss. Each part is a number in base 62. | |
2377 | The first part is the current time, in seconds. The second part is the current | |
2378 | pid. Both are large enough to hold 32-bit numbers in base 62. The third part | |
2379 | can hold a number in the range 0-3843. It used to be a computed sequence | |
2380 | number, but is now the fractional component of the current time in units of | |
2381 | 1/2000 of a second (i.e. a value in the range 0-1999). After a message has been | |
2382 | received, Exim ensures that the timer has ticked at the appropriate level | |
2383 | before proceeding, to avoid duplication if the pid happened to be re-used | |
2384 | within the same time period. It seems likely that most messages will take at | |
2385 | least half a millisecond to be received, so no delay will normally be | |
2386 | necessary. At least for some time... | |
2387 | ||
2388 | There is a modification when localhost_number is set. Formerly this was allowed | |
2389 | to be as large as 255. Now it is restricted to the range 0-16, and the final | |
2390 | component of the message id becomes (localhost_number * 200) + fractional time | |
2391 | in units of 1/200 of a second (i.e. a value in the range 0-3399). | |
2392 | ||
2393 | Some not-really-Unix operating systems use case-insensitive file names (Darwin, | |
2394 | Cygwin). For these, we have to use base 36 instead of base 62. Luckily, this | |
2395 | still allows the tttttt field to hold a large enough number to last for some | |
2396 | more decades, and the final two-digit field can hold numbers up to 1295, which | |
2397 | is enough for milliseconds (instead of 1/2000 of a second). | |
2398 | ||
2399 | However, the pppppp field cannot hold a 32-bit pid, but it can hold a 31-bit | |
2400 | pid, so it is probably safe because pids have to be positive. The | |
2401 | localhost_number is restricted to 0-10 for these hosts, and when it is set, the | |
2402 | final field becomes (localhost_number * 100) + fractional time in centiseconds. | |
2403 | ||
2404 | Note that string_base62() returns its data in a static storage block, so it | |
2405 | must be copied before calling string_base62() again. It always returns exactly | |
2406 | 6 characters. | |
2407 | ||
2408 | There doesn't seem to be anything in the RFC which requires a message id to | |
2409 | start with a letter, but Smail was changed to ensure this. The external form of | |
2410 | the message id (as supplied by string expansion) therefore starts with an | |
2411 | additional leading 'E'. The spool file names do not include this leading | |
2412 | letter and it is not used internally. | |
2413 | ||
2414 | NOTE: If ever the format of message ids is changed, the regular expression for | |
2415 | checking that a string is in this format must be updated in a corresponding | |
2416 | way. It appears in the initializing code in exim.c. The macro MESSAGE_ID_LENGTH | |
2417 | must also be changed to reflect the correct string length. Then, of course, | |
2418 | other programs that rely on the message id format will need updating too. */ | |
2419 | ||
2420 | Ustrncpy(message_id, string_base62((long int)(message_id_tv.tv_sec)), 6); | |
2421 | message_id[6] = '-'; | |
2422 | Ustrncpy(message_id + 7, string_base62((long int)getpid()), 6); | |
2423 | ||
2424 | /* Deal with the case where the host number is set. The value of the number was | |
2425 | checked when it was read, to ensure it isn't too big. The timing granularity is | |
2426 | left in id_resolution so that an appropriate wait can be done after receiving | |
2427 | the message, if necessary (we hope it won't be). */ | |
2428 | ||
2429 | if (host_number_string != NULL) | |
2430 | { | |
2431 | id_resolution = (BASE_62 == 62)? 5000 : 10000; | |
2432 | sprintf(CS(message_id + MESSAGE_ID_LENGTH - 3), "-%2s", | |
2433 | string_base62((long int)( | |
2434 | host_number * (1000000/id_resolution) + | |
2435 | message_id_tv.tv_usec/id_resolution)) + 4); | |
2436 | } | |
2437 | ||
2438 | /* Host number not set: final field is just the fractional time at an | |
2439 | appropriate resolution. */ | |
2440 | ||
2441 | else | |
2442 | { | |
2443 | id_resolution = (BASE_62 == 62)? 500 : 1000; | |
2444 | sprintf(CS(message_id + MESSAGE_ID_LENGTH - 3), "-%2s", | |
2445 | string_base62((long int)(message_id_tv.tv_usec/id_resolution)) + 4); | |
2446 | } | |
2447 | ||
2448 | /* Add the current message id onto the current process info string if | |
2449 | it will fit. */ | |
2450 | ||
2451 | (void)string_format(process_info + process_info_len, | |
2452 | PROCESS_INFO_SIZE - process_info_len, " id=%s", message_id); | |
2453 | ||
2454 | /* If we are using multiple input directories, set up the one for this message | |
2455 | to be the least significant base-62 digit of the time of arrival. Otherwise | |
2456 | ensure that it is an empty string. */ | |
2457 | ||
2458 | message_subdir[0] = split_spool_directory? message_id[5] : 0; | |
2459 | ||
2460 | /* Now that we have the message-id, if there is no message-id: header, generate | |
8800895a PH |
2461 | one, but only for local (without suppress_local_fixups) or submission mode |
2462 | messages. This can be user-configured if required, but we had better flatten | |
2463 | any illegal characters therein. */ | |
059ec3d9 | 2464 | |
8800895a PH |
2465 | if (msgid_header == NULL && |
2466 | ((sender_host_address == NULL && !suppress_local_fixups) | |
2467 | || submission_mode)) | |
059ec3d9 PH |
2468 | { |
2469 | uschar *p; | |
2470 | uschar *id_text = US""; | |
2471 | uschar *id_domain = primary_hostname; | |
2472 | ||
2473 | /* Permit only letters, digits, dots, and hyphens in the domain */ | |
2474 | ||
2475 | if (message_id_domain != NULL) | |
2476 | { | |
2477 | uschar *new_id_domain = expand_string(message_id_domain); | |
2478 | if (new_id_domain == NULL) | |
2479 | { | |
2480 | if (!expand_string_forcedfail) | |
2481 | log_write(0, LOG_MAIN|LOG_PANIC, | |
2482 | "expansion of \"%s\" (message_id_header_domain) " | |
2483 | "failed: %s", message_id_domain, expand_string_message); | |
2484 | } | |
2485 | else if (*new_id_domain != 0) | |
2486 | { | |
2487 | id_domain = new_id_domain; | |
2488 | for (p = id_domain; *p != 0; p++) | |
2489 | if (!isalnum(*p) && *p != '.') *p = '-'; /* No need to test '-' ! */ | |
2490 | } | |
2491 | } | |
2492 | ||
2493 | /* Permit all characters except controls and RFC 2822 specials in the | |
2494 | additional text part. */ | |
2495 | ||
2496 | if (message_id_text != NULL) | |
2497 | { | |
2498 | uschar *new_id_text = expand_string(message_id_text); | |
2499 | if (new_id_text == NULL) | |
2500 | { | |
2501 | if (!expand_string_forcedfail) | |
2502 | log_write(0, LOG_MAIN|LOG_PANIC, | |
2503 | "expansion of \"%s\" (message_id_header_text) " | |
2504 | "failed: %s", message_id_text, expand_string_message); | |
2505 | } | |
2506 | else if (*new_id_text != 0) | |
2507 | { | |
2508 | id_text = new_id_text; | |
2509 | for (p = id_text; *p != 0; p++) | |
2510 | if (mac_iscntrl_or_special(*p)) *p = '-'; | |
2511 | } | |
2512 | } | |
2513 | ||
e7e680d6 PP |
2514 | /* Add the header line |
2515 | * Resent-* headers are prepended, per RFC 5322 3.6.6. Non-Resent-* are | |
2516 | * appended, to preserve classical expectations of header ordering. */ | |
059ec3d9 | 2517 | |
e7e680d6 | 2518 | header_add_at_position(!resents_exist, NULL, FALSE, htype_id, |
5eb690a1 NM |
2519 | "%sMessage-Id: <%s%s%s@%s>\n", resent_prefix, message_id_external, |
2520 | (*id_text == 0)? "" : ".", id_text, id_domain); | |
059ec3d9 PH |
2521 | } |
2522 | ||
2523 | /* If we are to log recipients, keep a copy of the raw ones before any possible | |
2524 | rewriting. Must copy the count, because later ACLs and the local_scan() | |
2525 | function may mess with the real recipients. */ | |
2526 | ||
2527 | if ((log_extra_selector & LX_received_recipients) != 0) | |
2528 | { | |
2529 | raw_recipients = store_get(recipients_count * sizeof(uschar *)); | |
2530 | for (i = 0; i < recipients_count; i++) | |
2531 | raw_recipients[i] = string_copy(recipients_list[i].address); | |
2532 | raw_recipients_count = recipients_count; | |
2533 | } | |
2534 | ||
2535 | /* Ensure the recipients list is fully qualified and rewritten. Unqualified | |
2536 | recipients will get here only if the conditions were right (allow_unqualified_ | |
2537 | recipient is TRUE). */ | |
2538 | ||
2539 | for (i = 0; i < recipients_count; i++) | |
2540 | recipients_list[i].address = | |
2541 | rewrite_address(recipients_list[i].address, TRUE, TRUE, | |
2542 | global_rewrite_rules, rewrite_existflags); | |
2543 | ||
8800895a PH |
2544 | /* If there is no From: header, generate one for local (without |
2545 | suppress_local_fixups) or submission_mode messages. If there is no sender | |
2546 | address, but the sender is local or this is a local delivery error, use the | |
2547 | originator login. This shouldn't happen for genuine bounces, but might happen | |
2548 | for autoreplies. The addition of From: must be done *before* checking for the | |
2549 | possible addition of a Sender: header, because untrusted_set_sender allows an | |
2550 | untrusted user to set anything in the envelope (which might then get info | |
2551 | From:) but we still want to ensure a valid Sender: if it is required. */ | |
2552 | ||
2553 | if (from_header == NULL && | |
2554 | ((sender_host_address == NULL && !suppress_local_fixups) | |
2555 | || submission_mode)) | |
059ec3d9 | 2556 | { |
2fe1a124 PH |
2557 | uschar *oname = US""; |
2558 | ||
2559 | /* Use the originator_name if this is a locally submitted message and the | |
2560 | caller is not trusted. For trusted callers, use it only if -F was used to | |
2561 | force its value or if we have a non-SMTP message for which -f was not used | |
2562 | to set the sender. */ | |
2563 | ||
2564 | if (sender_host_address == NULL) | |
2565 | { | |
2566 | if (!trusted_caller || sender_name_forced || | |
2567 | (!smtp_input && !sender_address_forced)) | |
2568 | oname = originator_name; | |
2569 | } | |
2570 | ||
2571 | /* For non-locally submitted messages, the only time we use the originator | |
2572 | name is when it was forced by the /name= option on control=submission. */ | |
2573 | ||
2574 | else | |
2575 | { | |
2576 | if (submission_name != NULL) oname = submission_name; | |
2577 | } | |
2578 | ||
059ec3d9 PH |
2579 | /* Envelope sender is empty */ |
2580 | ||
2581 | if (sender_address[0] == 0) | |
2582 | { | |
87ba3f5f PH |
2583 | uschar *fromstart, *fromend; |
2584 | ||
2585 | fromstart = string_sprintf("%sFrom: %s%s", resent_prefix, | |
2fe1a124 PH |
2586 | oname, (oname[0] == 0)? "" : " <"); |
2587 | fromend = (oname[0] == 0)? US"" : US">"; | |
87ba3f5f | 2588 | |
059ec3d9 PH |
2589 | if (sender_local || local_error_message) |
2590 | { | |
87ba3f5f PH |
2591 | header_add(htype_from, "%s%s@%s%s\n", fromstart, |
2592 | local_part_quote(originator_login), qualify_domain_sender, | |
2593 | fromend); | |
059ec3d9 PH |
2594 | } |
2595 | else if (submission_mode && authenticated_id != NULL) | |
2596 | { | |
2597 | if (submission_domain == NULL) | |
2598 | { | |
87ba3f5f PH |
2599 | header_add(htype_from, "%s%s@%s%s\n", fromstart, |
2600 | local_part_quote(authenticated_id), qualify_domain_sender, | |
2601 | fromend); | |
059ec3d9 PH |
2602 | } |
2603 | else if (submission_domain[0] == 0) /* empty => whole address set */ | |
2604 | { | |
87ba3f5f PH |
2605 | header_add(htype_from, "%s%s%s\n", fromstart, authenticated_id, |
2606 | fromend); | |
059ec3d9 PH |
2607 | } |
2608 | else | |
2609 | { | |
87ba3f5f PH |
2610 | header_add(htype_from, "%s%s@%s%s\n", fromstart, |
2611 | local_part_quote(authenticated_id), submission_domain, | |
2612 | fromend); | |
059ec3d9 PH |
2613 | } |
2614 | from_header = header_last; /* To get it checked for Sender: */ | |
2615 | } | |
2616 | } | |
2617 | ||
2618 | /* There is a non-null envelope sender. Build the header using the original | |
2619 | sender address, before any rewriting that might have been done while | |
2620 | verifying it. */ | |
2621 | ||
2622 | else | |
2623 | { | |
87ba3f5f | 2624 | header_add(htype_from, "%sFrom: %s%s%s%s\n", resent_prefix, |
2fe1a124 PH |
2625 | oname, |
2626 | (oname[0] == 0)? "" : " <", | |
87ba3f5f PH |
2627 | (sender_address_unrewritten == NULL)? |
2628 | sender_address : sender_address_unrewritten, | |
2fe1a124 | 2629 | (oname[0] == 0)? "" : ">"); |
059ec3d9 PH |
2630 | |
2631 | from_header = header_last; /* To get it checked for Sender: */ | |
2632 | } | |
2633 | } | |
2634 | ||
2635 | ||
8800895a PH |
2636 | /* If the sender is local (without suppress_local_fixups), or if we are in |
2637 | submission mode and there is an authenticated_id, check that an existing From: | |
2638 | is correct, and if not, generate a Sender: header, unless disabled. Any | |
2639 | previously-existing Sender: header was removed above. Note that sender_local, | |
2640 | as well as being TRUE if the caller of exim is not trusted, is also true if a | |
2641 | trusted caller did not supply a -f argument for non-smtp input. To allow | |
2642 | trusted callers to forge From: without supplying -f, we have to test explicitly | |
2643 | here. If the From: header contains more than one address, then the call to | |
2644 | parse_extract_address fails, and a Sender: header is inserted, as required. */ | |
059ec3d9 PH |
2645 | |
2646 | if (from_header != NULL && | |
69358f02 | 2647 | (active_local_from_check && |
8800895a | 2648 | ((sender_local && !trusted_caller && !suppress_local_fixups) || |
69358f02 | 2649 | (submission_mode && authenticated_id != NULL)) |
059ec3d9 PH |
2650 | )) |
2651 | { | |
2652 | BOOL make_sender = TRUE; | |
2653 | int start, end, domain; | |
2654 | uschar *errmess; | |
2655 | uschar *from_address = | |
2656 | parse_extract_address(Ustrchr(from_header->text, ':') + 1, &errmess, | |
2657 | &start, &end, &domain, FALSE); | |
2658 | uschar *generated_sender_address; | |
2659 | ||
2660 | if (submission_mode) | |
2661 | { | |
2662 | if (submission_domain == NULL) | |
2663 | { | |
2664 | generated_sender_address = string_sprintf("%s@%s", | |
2665 | local_part_quote(authenticated_id), qualify_domain_sender); | |
2666 | } | |
2667 | else if (submission_domain[0] == 0) /* empty => full address */ | |
2668 | { | |
2669 | generated_sender_address = string_sprintf("%s", | |
2670 | authenticated_id); | |
2671 | } | |
2672 | else | |
2673 | { | |
2674 | generated_sender_address = string_sprintf("%s@%s", | |
2675 | local_part_quote(authenticated_id), submission_domain); | |
2676 | } | |
2677 | } | |
2678 | else | |
2679 | generated_sender_address = string_sprintf("%s@%s", | |
2680 | local_part_quote(originator_login), qualify_domain_sender); | |
2681 | ||
2682 | /* Remove permitted prefixes and suffixes from the local part of the From: | |
2683 | address before doing the comparison with the generated sender. */ | |
2684 | ||
2685 | if (from_address != NULL) | |
2686 | { | |
2687 | int slen; | |
2688 | uschar *at = (domain == 0)? NULL : from_address + domain - 1; | |
2689 | ||
2690 | if (at != NULL) *at = 0; | |
2691 | from_address += route_check_prefix(from_address, local_from_prefix); | |
2692 | slen = route_check_suffix(from_address, local_from_suffix); | |
2693 | if (slen > 0) | |
2694 | { | |
2695 | memmove(from_address+slen, from_address, Ustrlen(from_address)-slen); | |
2696 | from_address += slen; | |
2697 | } | |
2698 | if (at != NULL) *at = '@'; | |
2699 | ||
2700 | if (strcmpic(generated_sender_address, from_address) == 0 || | |
2701 | (domain == 0 && strcmpic(from_address, originator_login) == 0)) | |
2702 | make_sender = FALSE; | |
2703 | } | |
2704 | ||
2705 | /* We have to cause the Sender header to be rewritten if there are | |
2706 | appropriate rewriting rules. */ | |
2707 | ||
2708 | if (make_sender) | |
2709 | { | |
2fe1a124 | 2710 | if (submission_mode && submission_name == NULL) |
059ec3d9 PH |
2711 | header_add(htype_sender, "%sSender: %s\n", resent_prefix, |
2712 | generated_sender_address); | |
2713 | else | |
2714 | header_add(htype_sender, "%sSender: %s <%s>\n", | |
2fe1a124 PH |
2715 | resent_prefix, |
2716 | submission_mode? submission_name : originator_name, | |
2717 | generated_sender_address); | |
059ec3d9 | 2718 | } |
87ba3f5f PH |
2719 | |
2720 | /* Ensure that a non-null envelope sender address corresponds to the | |
2721 | submission mode sender address. */ | |
2722 | ||
2723 | if (submission_mode && sender_address[0] != 0) | |
2724 | { | |
2725 | if (sender_address_unrewritten == NULL) | |
2726 | sender_address_unrewritten = sender_address; | |
2727 | sender_address = generated_sender_address; | |
089793a4 TF |
2728 | if (Ustrcmp(sender_address_unrewritten, generated_sender_address) != 0) |
2729 | log_write(L_address_rewrite, LOG_MAIN, | |
2730 | "\"%s\" from env-from rewritten as \"%s\" by submission mode", | |
2731 | sender_address_unrewritten, generated_sender_address); | |
87ba3f5f | 2732 | } |
059ec3d9 PH |
2733 | } |
2734 | ||
059ec3d9 PH |
2735 | /* If there are any rewriting rules, apply them to the sender address, unless |
2736 | it has already been rewritten as part of verification for SMTP input. */ | |
2737 | ||
2738 | if (global_rewrite_rules != NULL && sender_address_unrewritten == NULL && | |
2739 | sender_address[0] != 0) | |
2740 | { | |
2741 | sender_address = rewrite_address(sender_address, FALSE, TRUE, | |
2742 | global_rewrite_rules, rewrite_existflags); | |
2743 | DEBUG(D_receive|D_rewrite) | |
2744 | debug_printf("rewritten sender = %s\n", sender_address); | |
2745 | } | |
2746 | ||
2747 | ||
2748 | /* The headers must be run through rewrite_header(), because it ensures that | |
2749 | addresses are fully qualified, as well as applying any rewriting rules that may | |
2750 | exist. | |
2751 | ||
2752 | Qualification of header addresses in a message from a remote host happens only | |
2753 | if the host is in sender_unqualified_hosts or recipient_unqualified hosts, as | |
2754 | appropriate. For local messages, qualification always happens, unless -bnq is | |
2755 | used to explicitly suppress it. No rewriting is done for an unqualified address | |
2756 | that is left untouched. | |
2757 | ||
2758 | We start at the second header, skipping our own Received:. This rewriting is | |
2759 | documented as happening *after* recipient addresses are taken from the headers | |
2760 | by the -t command line option. An added Sender: gets rewritten here. */ | |
2761 | ||
2762 | for (h = header_list->next; h != NULL; h = h->next) | |
2763 | { | |
2764 | header_line *newh = rewrite_header(h, NULL, NULL, global_rewrite_rules, | |
2765 | rewrite_existflags, TRUE); | |
2766 | if (newh != NULL) h = newh; | |
2767 | } | |
2768 | ||
2769 | ||
2770 | /* An RFC 822 (sic) message is not legal unless it has at least one of "to", | |
2cbb4081 | 2771 | "cc", or "bcc". Note that although the minimal examples in RFC 822 show just |
059ec3d9 PH |
2772 | "to" or "bcc", the full syntax spec allows "cc" as well. If any resent- header |
2773 | exists, this applies to the set of resent- headers rather than the normal set. | |
2774 | ||
2cbb4081 PH |
2775 | The requirement for a recipient header has been removed in RFC 2822. At this |
2776 | point in the code, earlier versions of Exim added a To: header for locally | |
2777 | submitted messages, and an empty Bcc: header for others. In the light of the | |
2778 | changes in RFC 2822, this was dropped in November 2003. */ | |
059ec3d9 | 2779 | |
059ec3d9 PH |
2780 | |
2781 | /* If there is no date header, generate one if the message originates locally | |
8800895a PH |
2782 | (i.e. not over TCP/IP) and suppress_local_fixups is not set, or if the |
2783 | submission mode flag is set. Messages without Date: are not valid, but it seems | |
e7e680d6 PP |
2784 | to be more confusing if Exim adds one to all remotely-originated messages. |
2785 | As per Message-Id, we prepend if resending, else append. | |
2786 | */ | |
059ec3d9 | 2787 | |
8800895a PH |
2788 | if (!date_header_exists && |
2789 | ((sender_host_address == NULL && !suppress_local_fixups) | |
2790 | || submission_mode)) | |
e7e680d6 PP |
2791 | header_add_at_position(!resents_exist, NULL, FALSE, htype_other, |
2792 | "%sDate: %s\n", resent_prefix, tod_stamp(tod_full)); | |
059ec3d9 PH |
2793 | |
2794 | search_tidyup(); /* Free any cached resources */ | |
2795 | ||
2796 | /* Show the complete set of headers if debugging. Note that the first one (the | |
2797 | new Received:) has not yet been set. */ | |
2798 | ||
2799 | DEBUG(D_receive) | |
2800 | { | |
2801 | debug_printf(">>Headers after rewriting and local additions:\n"); | |
2802 | for (h = header_list->next; h != NULL; h = h->next) | |
2803 | debug_printf("%c %s", h->type, h->text); | |
2804 | debug_printf("\n"); | |
2805 | } | |
2806 | ||
2807 | /* The headers are now complete in store. If we are running in filter | |
2808 | testing mode, that is all this function does. Return TRUE if the message | |
2809 | ended with a dot. */ | |
2810 | ||
f05da2e8 | 2811 | if (filter_test != FTEST_NONE) |
059ec3d9 PH |
2812 | { |
2813 | process_info[process_info_len] = 0; | |
2814 | return message_ended == END_DOT; | |
2815 | } | |
2816 | ||
817d9f57 | 2817 | /* Cutthrough delivery: |
e4bdf652 JH |
2818 | We have to create the Received header now rather than at the end of reception, |
2819 | so the timestamp behaviour is a change to the normal case. | |
2820 | XXX Ensure this gets documented XXX. | |
817d9f57 | 2821 | Having created it, send the headers to the destination. |
e4bdf652 JH |
2822 | */ |
2823 | if (cutthrough_fd >= 0) | |
2824 | { | |
817d9f57 JH |
2825 | if (received_count > received_headers_max) |
2826 | { | |
2e5b33cd | 2827 | cancel_cutthrough_connection("too many headers"); |
817d9f57 JH |
2828 | if (smtp_input) receive_swallow_smtp(); /* Swallow incoming SMTP */ |
2829 | log_write(0, LOG_MAIN|LOG_REJECT, "rejected from <%s>%s%s%s%s: " | |
2830 | "Too many \"Received\" headers", | |
2831 | sender_address, | |
2832 | (sender_fullhost == NULL)? "" : " H=", | |
2833 | (sender_fullhost == NULL)? US"" : sender_fullhost, | |
2834 | (sender_ident == NULL)? "" : " U=", | |
2835 | (sender_ident == NULL)? US"" : sender_ident); | |
2836 | message_id[0] = 0; /* Indicate no message accepted */ | |
2837 | smtp_reply = US"550 Too many \"Received\" headers - suspected mail loop"; | |
2838 | goto TIDYUP; /* Skip to end of function */ | |
2839 | } | |
e4bdf652 | 2840 | received_header_gen(); |
578d43dc | 2841 | add_acl_headers(ACL_WHERE_RCPT, US"MAIL or RCPT"); |
e4bdf652 JH |
2842 | (void) cutthrough_headers_send(); |
2843 | } | |
61147df4 | 2844 | |
e4bdf652 | 2845 | |
059ec3d9 PH |
2846 | /* Open a new spool file for the data portion of the message. We need |
2847 | to access it both via a file descriptor and a stream. Try to make the | |
2848 | directory if it isn't there. Note re use of sprintf: spool_directory | |
2849 | is checked on input to be < 200 characters long. */ | |
2850 | ||
2851 | sprintf(CS spool_name, "%s/input/%s/%s-D", spool_directory, message_subdir, | |
2852 | message_id); | |
2853 | data_fd = Uopen(spool_name, O_RDWR|O_CREAT|O_EXCL, SPOOL_MODE); | |
2854 | if (data_fd < 0) | |
2855 | { | |
2856 | if (errno == ENOENT) | |
2857 | { | |
2858 | uschar temp[16]; | |
2859 | sprintf(CS temp, "input/%s", message_subdir); | |
2860 | if (message_subdir[0] == 0) temp[5] = 0; | |
2861 | (void)directory_make(spool_directory, temp, INPUT_DIRECTORY_MODE, TRUE); | |
2862 | data_fd = Uopen(spool_name, O_RDWR|O_CREAT|O_EXCL, SPOOL_MODE); | |
2863 | } | |
2864 | if (data_fd < 0) | |
2865 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to create spool file %s: %s", | |
2866 | spool_name, strerror(errno)); | |
2867 | } | |
2868 | ||
2869 | /* Make sure the file's group is the Exim gid, and double-check the mode | |
2870 | because the group setting doesn't always get set automatically. */ | |
2871 | ||
1ac6b2e7 JH |
2872 | if (fchown(data_fd, exim_uid, exim_gid)) |
2873 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, | |
2874 | "Failed setting ownership on spool file %s: %s", | |
2875 | spool_name, strerror(errno)); | |
ff790e47 | 2876 | (void)fchmod(data_fd, SPOOL_MODE); |
059ec3d9 PH |
2877 | |
2878 | /* We now have data file open. Build a stream for it and lock it. We lock only | |
2879 | the first line of the file (containing the message ID) because otherwise there | |
2880 | are problems when Exim is run under Cygwin (I'm told). See comments in | |
2881 | spool_in.c, where the same locking is done. */ | |
2882 | ||
2883 | data_file = fdopen(data_fd, "w+"); | |
2884 | lock_data.l_type = F_WRLCK; | |
2885 | lock_data.l_whence = SEEK_SET; | |
2886 | lock_data.l_start = 0; | |
2887 | lock_data.l_len = SPOOL_DATA_START_OFFSET; | |
2888 | ||
2889 | if (fcntl(data_fd, F_SETLK, &lock_data) < 0) | |
2890 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Cannot lock %s (%d): %s", spool_name, | |
2891 | errno, strerror(errno)); | |
2892 | ||
2893 | /* We have an open, locked data file. Write the message id to it to make it | |
2894 | self-identifying. Then read the remainder of the input of this message and | |
2895 | write it to the data file. If the variable next != NULL, it contains the first | |
2896 | data line (which was read as a header but then turned out not to have the right | |
2897 | format); write it (remembering that it might contain binary zeros). The result | |
2898 | of fwrite() isn't inspected; instead we call ferror() below. */ | |
2899 | ||
2900 | fprintf(data_file, "%s-D\n", message_id); | |
2901 | if (next != NULL) | |
2902 | { | |
2903 | uschar *s = next->text; | |
2904 | int len = next->slen; | |
1ac6b2e7 | 2905 | len = fwrite(s, 1, len, data_file); len = len; /* compiler quietening */ |
059ec3d9 PH |
2906 | body_linecount++; /* Assumes only 1 line */ |
2907 | } | |
2908 | ||
2909 | /* Note that we might already be at end of file, or the logical end of file | |
2910 | (indicated by '.'), or might have encountered an error while writing the | |
2911 | message id or "next" line. */ | |
2912 | ||
2913 | if (!ferror(data_file) && !(receive_feof)() && message_ended != END_DOT) | |
2914 | { | |
2915 | if (smtp_input) | |
2916 | { | |
2917 | message_ended = read_message_data_smtp(data_file); | |
2918 | receive_linecount++; /* The terminating "." line */ | |
2919 | } | |
2920 | else message_ended = read_message_data(data_file); | |
2921 | ||
2922 | receive_linecount += body_linecount; /* For BSMTP errors mainly */ | |
2e0c1448 | 2923 | message_linecount += body_linecount; |
059ec3d9 PH |
2924 | |
2925 | /* Handle premature termination of SMTP */ | |
2926 | ||
2927 | if (smtp_input && message_ended == END_EOF) | |
2928 | { | |
2929 | Uunlink(spool_name); /* Lose data file when closed */ | |
2e5b33cd | 2930 | cancel_cutthrough_connection("sender closed connection"); |
059ec3d9 PH |
2931 | message_id[0] = 0; /* Indicate no message accepted */ |
2932 | smtp_reply = handle_lost_connection(US""); | |
2933 | smtp_yield = FALSE; | |
2934 | goto TIDYUP; /* Skip to end of function */ | |
2935 | } | |
2936 | ||
2937 | /* Handle message that is too big. Don't use host_or_ident() in the log | |
2938 | message; we want to see the ident value even for non-remote messages. */ | |
2939 | ||
2940 | if (message_ended == END_SIZE) | |
2941 | { | |
2942 | Uunlink(spool_name); /* Lose the data file when closed */ | |
2e5b33cd | 2943 | cancel_cutthrough_connection("mail too big"); |
059ec3d9 PH |
2944 | if (smtp_input) receive_swallow_smtp(); /* Swallow incoming SMTP */ |
2945 | ||
2946 | log_write(L_size_reject, LOG_MAIN|LOG_REJECT, "rejected from <%s>%s%s%s%s: " | |
2947 | "message too big: read=%d max=%d", | |
2948 | sender_address, | |
2949 | (sender_fullhost == NULL)? "" : " H=", | |
2950 | (sender_fullhost == NULL)? US"" : sender_fullhost, | |
2951 | (sender_ident == NULL)? "" : " U=", | |
2952 | (sender_ident == NULL)? US"" : sender_ident, | |
2953 | message_size, | |
2954 | thismessage_size_limit); | |
2955 | ||
2956 | if (smtp_input) | |
2957 | { | |
2958 | smtp_reply = US"552 Message size exceeds maximum permitted"; | |
2959 | message_id[0] = 0; /* Indicate no message accepted */ | |
2960 | goto TIDYUP; /* Skip to end of function */ | |
2961 | } | |
2962 | else | |
2963 | { | |
2964 | fseek(data_file, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
2965 | give_local_error(ERRMESS_TOOBIG, | |
2966 | string_sprintf("message too big (max=%d)", thismessage_size_limit), | |
2967 | US"message rejected: ", error_rc, data_file, header_list); | |
2968 | /* Does not return */ | |
2969 | } | |
2970 | } | |
2971 | } | |
2972 | ||
2973 | /* Restore the standard SIGALRM handler for any subsequent processing. (For | |
2974 | example, there may be some expansion in an ACL that uses a timer.) */ | |
2975 | ||
2976 | os_non_restarting_signal(SIGALRM, sigalrm_handler); | |
2977 | ||
2978 | /* The message body has now been read into the data file. Call fflush() to | |
2979 | empty the buffers in C, and then call fsync() to get the data written out onto | |
2980 | the disk, as fflush() doesn't do this (or at least, it isn't documented as | |
2981 | having to do this). If there was an I/O error on either input or output, | |
2982 | attempt to send an error message, and unlink the spool file. For non-SMTP input | |
2983 | we can then give up. Note that for SMTP input we must swallow the remainder of | |
2984 | the input in cases of output errors, since the far end doesn't expect to see | |
2985 | anything until the terminating dot line is sent. */ | |
2986 | ||
2987 | if (fflush(data_file) == EOF || ferror(data_file) || | |
54fc8428 | 2988 | EXIMfsync(fileno(data_file)) < 0 || (receive_ferror)()) |
059ec3d9 PH |
2989 | { |
2990 | uschar *msg_errno = US strerror(errno); | |
2991 | BOOL input_error = (receive_ferror)() != 0; | |
2992 | uschar *msg = string_sprintf("%s error (%s) while receiving message from %s", | |
2993 | input_error? "Input read" : "Spool write", | |
2994 | msg_errno, | |
2995 | (sender_fullhost != NULL)? sender_fullhost : sender_ident); | |
2996 | ||
2997 | log_write(0, LOG_MAIN, "Message abandoned: %s", msg); | |
2998 | Uunlink(spool_name); /* Lose the data file */ | |
2e5b33cd | 2999 | cancel_cutthrough_connection("error writing spoolfile"); |
059ec3d9 PH |
3000 | |
3001 | if (smtp_input) | |
3002 | { | |
3003 | if (input_error) | |
3004 | smtp_reply = US"451 Error while reading input data"; | |
3005 | else | |
3006 | { | |
3007 | smtp_reply = US"451 Error while writing spool file"; | |
3008 | receive_swallow_smtp(); | |
3009 | } | |
3010 | message_id[0] = 0; /* Indicate no message accepted */ | |
3011 | goto TIDYUP; /* Skip to end of function */ | |
3012 | } | |
3013 | ||
3014 | else | |
3015 | { | |
3016 | fseek(data_file, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3017 | give_local_error(ERRMESS_IOERR, msg, US"", error_rc, data_file, | |
3018 | header_list); | |
3019 | /* Does not return */ | |
3020 | } | |
3021 | } | |
3022 | ||
3023 | ||
3024 | /* No I/O errors were encountered while writing the data file. */ | |
3025 | ||
3026 | DEBUG(D_receive) debug_printf("Data file written for message %s\n", message_id); | |
3027 | ||
3028 | ||
3029 | /* If there were any bad addresses extracted by -t, or there were no recipients | |
3030 | left after -t, send a message to the sender of this message, or write it to | |
3031 | stderr if the error handling option is set that way. Note that there may | |
3032 | legitimately be no recipients for an SMTP message if they have all been removed | |
3033 | by "discard". | |
3034 | ||
3035 | We need to rewind the data file in order to read it. In the case of no | |
3036 | recipients or stderr error writing, throw the data file away afterwards, and | |
3037 | exit. (This can't be SMTP, which always ensures there's at least one | |
3038 | syntactically good recipient address.) */ | |
3039 | ||
3040 | if (extract_recip && (bad_addresses != NULL || recipients_count == 0)) | |
3041 | { | |
3042 | DEBUG(D_receive) | |
3043 | { | |
3044 | if (recipients_count == 0) debug_printf("*** No recipients\n"); | |
3045 | if (bad_addresses != NULL) | |
3046 | { | |
3047 | error_block *eblock = bad_addresses; | |
3048 | debug_printf("*** Bad address(es)\n"); | |
3049 | while (eblock != NULL) | |
3050 | { | |
3051 | debug_printf(" %s: %s\n", eblock->text1, eblock->text2); | |
3052 | eblock = eblock->next; | |
3053 | } | |
3054 | } | |
3055 | } | |
3056 | ||
3057 | fseek(data_file, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3058 | ||
3059 | /* If configured to send errors to the sender, but this fails, force | |
3060 | a failure error code. We use a special one for no recipients so that it | |
3061 | can be detected by the autoreply transport. Otherwise error_rc is set to | |
3062 | errors_sender_rc, which is EXIT_FAILURE unless -oee was given, in which case | |
3063 | it is EXIT_SUCCESS. */ | |
3064 | ||
3065 | if (error_handling == ERRORS_SENDER) | |
3066 | { | |
3067 | if (!moan_to_sender( | |
3068 | (bad_addresses == NULL)? | |
3069 | (extracted_ignored? ERRMESS_IGADDRESS : ERRMESS_NOADDRESS) : | |
3070 | (recipients_list == NULL)? ERRMESS_BADNOADDRESS : ERRMESS_BADADDRESS, | |
3071 | bad_addresses, header_list, data_file, FALSE)) | |
3072 | error_rc = (bad_addresses == NULL)? EXIT_NORECIPIENTS : EXIT_FAILURE; | |
3073 | } | |
3074 | else | |
3075 | { | |
3076 | if (bad_addresses == NULL) | |
3077 | { | |
3078 | if (extracted_ignored) | |
3079 | fprintf(stderr, "exim: all -t recipients overridden by command line\n"); | |
3080 | else | |
3081 | fprintf(stderr, "exim: no recipients in message\n"); | |
3082 | } | |
3083 | else | |
3084 | { | |
3085 | fprintf(stderr, "exim: invalid address%s", | |
3086 | (bad_addresses->next == NULL)? ":" : "es:\n"); | |
3087 | while (bad_addresses != NULL) | |
3088 | { | |
3089 | fprintf(stderr, " %s: %s\n", bad_addresses->text1, | |
3090 | bad_addresses->text2); | |
3091 | bad_addresses = bad_addresses->next; | |
3092 | } | |
3093 | } | |
3094 | } | |
3095 | ||
3096 | if (recipients_count == 0 || error_handling == ERRORS_STDERR) | |
3097 | { | |
3098 | Uunlink(spool_name); | |
f1e894f3 | 3099 | (void)fclose(data_file); |
059ec3d9 PH |
3100 | exim_exit(error_rc); |
3101 | } | |
3102 | } | |
3103 | ||
3104 | /* Data file successfully written. Generate text for the Received: header by | |
3105 | expanding the configured string, and adding a timestamp. By leaving this | |
3106 | operation till now, we ensure that the timestamp is the time that message | |
3107 | reception was completed. However, this is deliberately done before calling the | |
3108 | data ACL and local_scan(). | |
3109 | ||
3110 | This Received: header may therefore be inspected by the data ACL and by code in | |
3111 | the local_scan() function. When they have run, we update the timestamp to be | |
3112 | the final time of reception. | |
3113 | ||
3114 | If there is just one recipient, set up its value in the $received_for variable | |
3115 | for use when we generate the Received: header. | |
3116 | ||
3117 | Note: the checking for too many Received: headers is handled by the delivery | |
3118 | code. */ | |
e4bdf652 | 3119 | /*XXX eventually add excess Received: check for cutthrough case back when classifying them */ |
059ec3d9 | 3120 | |
e4bdf652 | 3121 | if (received_header->text == NULL) /* Non-cutthrough case */ |
059ec3d9 | 3122 | { |
e4bdf652 | 3123 | received_header_gen(); |
059ec3d9 | 3124 | |
e4bdf652 | 3125 | /* Set the value of message_body_size for the DATA ACL and for local_scan() */ |
059ec3d9 | 3126 | |
e4bdf652 JH |
3127 | message_body_size = (fstat(data_fd, &statbuf) == 0)? |
3128 | statbuf.st_size - SPOOL_DATA_START_OFFSET : -1; | |
059ec3d9 | 3129 | |
e4bdf652 JH |
3130 | /* If an ACL from any RCPT commands set up any warning headers to add, do so |
3131 | now, before running the DATA ACL. */ | |
059ec3d9 | 3132 | |
578d43dc | 3133 | add_acl_headers(ACL_WHERE_RCPT, US"MAIL or RCPT"); |
e4bdf652 | 3134 | } |
817d9f57 | 3135 | else |
e4bdf652 JH |
3136 | message_body_size = (fstat(data_fd, &statbuf) == 0)? |
3137 | statbuf.st_size - SPOOL_DATA_START_OFFSET : -1; | |
059ec3d9 PH |
3138 | |
3139 | /* If an ACL is specified for checking things at this stage of reception of a | |
3140 | message, run it, unless all the recipients were removed by "discard" in earlier | |
3141 | ACLs. That is the only case in which recipients_count can be zero at this | |
3142 | stage. Set deliver_datafile to point to the data file so that $message_body and | |
3143 | $message_body_end can be extracted if needed. Allow $recipients in expansions. | |
3144 | */ | |
3145 | ||
3146 | deliver_datafile = data_fd; | |
4e88a19f | 3147 | user_msg = NULL; |
059ec3d9 | 3148 | |
0e20aff9 MH |
3149 | enable_dollar_recipients = TRUE; |
3150 | ||
059ec3d9 PH |
3151 | if (recipients_count == 0) |
3152 | { | |
3153 | blackholed_by = recipients_discarded? US"MAIL ACL" : US"RCPT ACL"; | |
3154 | } | |
3155 | else | |
3156 | { | |
059ec3d9 PH |
3157 | /* Handle interactive SMTP messages */ |
3158 | ||
3159 | if (smtp_input && !smtp_batched_input) | |
3160 | { | |
8523533c | 3161 | |
80a47a2c TK |
3162 | #ifndef DISABLE_DKIM |
3163 | if (!dkim_disable_verify) | |
3164 | { | |
3165 | /* Finish verification, this will log individual signature results to | |
3166 | the mainlog */ | |
3167 | dkim_exim_verify_finish(); | |
3168 | ||
3169 | /* Check if we must run the DKIM ACL */ | |
3170 | if ((acl_smtp_dkim != NULL) && | |
3171 | (dkim_verify_signers != NULL) && | |
3172 | (dkim_verify_signers[0] != '\0')) | |
3173 | { | |
3174 | uschar *dkim_verify_signers_expanded = | |
3175 | expand_string(dkim_verify_signers); | |
3176 | if (dkim_verify_signers_expanded == NULL) | |
3177 | { | |
3178 | log_write(0, LOG_MAIN|LOG_PANIC, | |
3179 | "expansion of dkim_verify_signers option failed: %s", | |
3180 | expand_string_message); | |
3181 | } | |
3182 | else | |
3183 | { | |
3184 | int sep = 0; | |
3185 | uschar *ptr = dkim_verify_signers_expanded; | |
3186 | uschar *item = NULL; | |
9e5d6b55 TK |
3187 | uschar *seen_items = NULL; |
3188 | int seen_items_size = 0; | |
3189 | int seen_items_offset = 0; | |
80a47a2c | 3190 | uschar itembuf[256]; |
9122af94 TK |
3191 | /* Default to OK when no items are present */ |
3192 | rc = OK; | |
80a47a2c TK |
3193 | while ((item = string_nextinlist(&ptr, &sep, |
3194 | itembuf, | |
3195 | sizeof(itembuf))) != NULL) | |
3196 | { | |
6119d1ea TK |
3197 | /* Prevent running ACL for an empty item */ |
3198 | if (!item || (item[0] == '\0')) continue; | |
9e5d6b55 TK |
3199 | /* Only run ACL once for each domain or identity, no matter how often it |
3200 | appears in the expanded list. */ | |
6119d1ea TK |
3201 | if (seen_items != NULL) |
3202 | { | |
ae9094bf TK |
3203 | uschar *seen_item = NULL; |
3204 | uschar seen_item_buf[256]; | |
4a73449b | 3205 | uschar *seen_items_list = seen_items; |
ae9094bf | 3206 | int seen_this_item = 0; |
61147df4 | 3207 | |
ae9094bf TK |
3208 | while ((seen_item = string_nextinlist(&seen_items_list, &sep, |
3209 | seen_item_buf, | |
3210 | sizeof(seen_item_buf))) != NULL) | |
3211 | { | |
3212 | if (Ustrcmp(seen_item,item) == 0) | |
3213 | { | |
3214 | seen_this_item = 1; | |
3215 | break; | |
61147df4 | 3216 | } |
ae9094bf TK |
3217 | } |
3218 | ||
3219 | if (seen_this_item > 0) | |
6119d1ea TK |
3220 | { |
3221 | DEBUG(D_receive) | |
3222 | debug_printf("acl_smtp_dkim: skipping signer %s, already seen\n", item); | |
3223 | continue; | |
3224 | } | |
61147df4 | 3225 | |
4a73449b | 3226 | seen_items = string_append(seen_items,&seen_items_size,&seen_items_offset,1,":"); |
6119d1ea TK |
3227 | } |
3228 | ||
4a73449b TK |
3229 | seen_items = string_append(seen_items,&seen_items_size,&seen_items_offset,1,item); |
3230 | seen_items[seen_items_offset] = '\0'; | |
6119d1ea TK |
3231 | |
3232 | DEBUG(D_receive) | |
3233 | debug_printf("calling acl_smtp_dkim for dkim_cur_signer=%s\n", item); | |
3234 | ||
80a47a2c TK |
3235 | dkim_exim_acl_setup(item); |
3236 | rc = acl_check(ACL_WHERE_DKIM, NULL, acl_smtp_dkim, &user_msg, &log_msg); | |
6119d1ea TK |
3237 | |
3238 | if (rc != OK) | |
3239 | { | |
3240 | DEBUG(D_receive) | |
3241 | debug_printf("acl_smtp_dkim: acl_check returned %d on %s, skipping remaining items\n", rc, item); | |
2e5b33cd | 3242 | cancel_cutthrough_connection("dkim acl not ok"); |
6119d1ea TK |
3243 | break; |
3244 | } | |
80a47a2c | 3245 | } |
578d43dc | 3246 | add_acl_headers(ACL_WHERE_DKIM, US"DKIM"); |
80a47a2c TK |
3247 | if (rc == DISCARD) |
3248 | { | |
3249 | recipients_count = 0; | |
3250 | blackholed_by = US"DKIM ACL"; | |
3251 | if (log_msg != NULL) | |
3252 | blackhole_log_msg = string_sprintf(": %s", log_msg); | |
3253 | } | |
3254 | else if (rc != OK) | |
3255 | { | |
3256 | Uunlink(spool_name); | |
3257 | if (smtp_handle_acl_fail(ACL_WHERE_DKIM, rc, user_msg, log_msg) != 0) | |
3258 | smtp_yield = FALSE; /* No more messsages after dropped connection */ | |
3259 | smtp_reply = US""; /* Indicate reply already sent */ | |
3260 | message_id[0] = 0; /* Indicate no message accepted */ | |
3261 | goto TIDYUP; /* Skip to end of function */ | |
3262 | } | |
3263 | } | |
3264 | } | |
3265 | } | |
4a8ce2d8 | 3266 | #endif /* DISABLE_DKIM */ |
fb2274d4 | 3267 | |
8523533c | 3268 | #ifdef WITH_CONTENT_SCAN |
80a47a2c TK |
3269 | if (recipients_count > 0 && |
3270 | acl_smtp_mime != NULL && | |
54cdb463 PH |
3271 | !run_mime_acl(acl_smtp_mime, &smtp_yield, &smtp_reply, &blackholed_by)) |
3272 | goto TIDYUP; | |
8523533c TK |
3273 | #endif /* WITH_CONTENT_SCAN */ |
3274 | ||
4840604e TL |
3275 | #ifdef EXPERIMENTAL_DMARC |
3276 | dmarc_up = dmarc_store_data(from_header); | |
3277 | #endif /* EXPERIMENTAL_DMARC */ | |
3278 | ||
fd98a5c6 JH |
3279 | #ifdef EXPERIMENTAL_PRDR |
3280 | if (prdr_requested && recipients_count > 1 && acl_smtp_data_prdr != NULL ) | |
3281 | { | |
3282 | unsigned int c; | |
3283 | int all_pass = OK; | |
3284 | int all_fail = FAIL; | |
3285 | ||
3286 | smtp_printf("353 PRDR content analysis beginning\r\n"); | |
3287 | /* Loop through recipients, responses must be in same order received */ | |
3288 | for (c = 0; recipients_count > c; c++) | |
3289 | { | |
3290 | uschar * addr= recipients_list[c].address; | |
3291 | uschar * msg= US"PRDR R=<%s> %s"; | |
3292 | uschar * code; | |
3293 | DEBUG(D_receive) | |
3294 | debug_printf("PRDR processing recipient %s (%d of %d)\n", | |
3295 | addr, c+1, recipients_count); | |
3296 | rc = acl_check(ACL_WHERE_PRDR, addr, | |
3297 | acl_smtp_data_prdr, &user_msg, &log_msg); | |
3298 | ||
3299 | /* If any recipient rejected content, indicate it in final message */ | |
3300 | all_pass |= rc; | |
3301 | /* If all recipients rejected, indicate in final message */ | |
3302 | all_fail &= rc; | |
3303 | ||
3304 | switch (rc) | |
3305 | { | |
3306 | case OK: case DISCARD: code = US"250"; break; | |
3307 | case DEFER: code = US"450"; break; | |
3308 | default: code = US"550"; break; | |
3309 | } | |
3310 | if (user_msg != NULL) | |
3311 | smtp_user_msg(code, user_msg); | |
3312 | else | |
3313 | { | |
3314 | switch (rc) | |
3315 | { | |
3316 | case OK: case DISCARD: | |
3317 | msg = string_sprintf(CS msg, addr, "acceptance"); break; | |
3318 | case DEFER: | |
3319 | msg = string_sprintf(CS msg, addr, "temporary refusal"); break; | |
3320 | default: | |
3321 | msg = string_sprintf(CS msg, addr, "refusal"); break; | |
3322 | } | |
3323 | smtp_user_msg(code, msg); | |
3324 | } | |
3325 | if (log_msg) log_write(0, LOG_MAIN, "PRDR %s %s", addr, log_msg); | |
3326 | else if (user_msg) log_write(0, LOG_MAIN, "PRDR %s %s", addr, user_msg); | |
112b6a93 | 3327 | else log_write(0, LOG_MAIN, "%s", CS msg); |
fd98a5c6 JH |
3328 | |
3329 | if (rc != OK) { receive_remove_recipient(addr); c--; } | |
3330 | } | |
3331 | /* Set up final message, used if data acl gives OK */ | |
3332 | smtp_reply = string_sprintf("%s id=%s message %s", | |
3333 | all_fail == FAIL ? US"550" : US"250", | |
3334 | message_id, | |
3335 | all_fail == FAIL | |
3336 | ? US"rejected for all recipients" | |
3337 | : all_pass == OK | |
3338 | ? US"accepted" | |
3339 | : US"accepted for some recipients"); | |
3340 | if (recipients_count == 0) | |
3341 | { | |
3342 | message_id[0] = 0; /* Indicate no message accepted */ | |
3343 | goto TIDYUP; | |
3344 | } | |
3345 | } | |
3346 | else | |
3347 | prdr_requested = FALSE; | |
3348 | #endif /* EXPERIMENTAL_PRDR */ | |
3349 | ||
54cdb463 PH |
3350 | /* Check the recipients count again, as the MIME ACL might have changed |
3351 | them. */ | |
8523533c | 3352 | |
059ec3d9 PH |
3353 | if (acl_smtp_data != NULL && recipients_count > 0) |
3354 | { | |
059ec3d9 | 3355 | rc = acl_check(ACL_WHERE_DATA, NULL, acl_smtp_data, &user_msg, &log_msg); |
578d43dc | 3356 | add_acl_headers(ACL_WHERE_DATA, US"DATA"); |
059ec3d9 PH |
3357 | if (rc == DISCARD) |
3358 | { | |
3359 | recipients_count = 0; | |
3360 | blackholed_by = US"DATA ACL"; | |
8e669ac1 PH |
3361 | if (log_msg != NULL) |
3362 | blackhole_log_msg = string_sprintf(": %s", log_msg); | |
2e5b33cd | 3363 | cancel_cutthrough_connection("data acl discard"); |
059ec3d9 PH |
3364 | } |
3365 | else if (rc != OK) | |
3366 | { | |
3367 | Uunlink(spool_name); | |
2e5b33cd | 3368 | cancel_cutthrough_connection("data acl not ok"); |
8523533c TK |
3369 | #ifdef WITH_CONTENT_SCAN |
3370 | unspool_mbox(); | |
6f0c431a PP |
3371 | #endif |
3372 | #ifdef EXPERIMENTAL_DCC | |
3373 | dcc_ok = 0; | |
8523533c | 3374 | #endif |
059ec3d9 PH |
3375 | if (smtp_handle_acl_fail(ACL_WHERE_DATA, rc, user_msg, log_msg) != 0) |
3376 | smtp_yield = FALSE; /* No more messsages after dropped connection */ | |
3377 | smtp_reply = US""; /* Indicate reply already sent */ | |
3378 | message_id[0] = 0; /* Indicate no message accepted */ | |
3379 | goto TIDYUP; /* Skip to end of function */ | |
3380 | } | |
3381 | } | |
3382 | } | |
3383 | ||
3384 | /* Handle non-SMTP and batch SMTP (i.e. non-interactive) messages. Note that | |
3385 | we cannot take different actions for permanent and temporary rejections. */ | |
3386 | ||
54cdb463 | 3387 | else |
059ec3d9 | 3388 | { |
54cdb463 PH |
3389 | |
3390 | #ifdef WITH_CONTENT_SCAN | |
3391 | if (acl_not_smtp_mime != NULL && | |
3392 | !run_mime_acl(acl_not_smtp_mime, &smtp_yield, &smtp_reply, | |
3393 | &blackholed_by)) | |
3394 | goto TIDYUP; | |
3395 | #endif /* WITH_CONTENT_SCAN */ | |
3396 | ||
3397 | if (acl_not_smtp != NULL) | |
059ec3d9 | 3398 | { |
54cdb463 PH |
3399 | uschar *user_msg, *log_msg; |
3400 | rc = acl_check(ACL_WHERE_NOTSMTP, NULL, acl_not_smtp, &user_msg, &log_msg); | |
3401 | if (rc == DISCARD) | |
059ec3d9 | 3402 | { |
54cdb463 PH |
3403 | recipients_count = 0; |
3404 | blackholed_by = US"non-SMTP ACL"; | |
3405 | if (log_msg != NULL) | |
3406 | blackhole_log_msg = string_sprintf(": %s", log_msg); | |
059ec3d9 | 3407 | } |
54cdb463 | 3408 | else if (rc != OK) |
059ec3d9 | 3409 | { |
54cdb463 PH |
3410 | Uunlink(spool_name); |
3411 | #ifdef WITH_CONTENT_SCAN | |
3412 | unspool_mbox(); | |
6f0c431a PP |
3413 | #endif |
3414 | #ifdef EXPERIMENTAL_DCC | |
3415 | dcc_ok = 0; | |
54cdb463 | 3416 | #endif |
6ea85e9a PH |
3417 | /* The ACL can specify where rejections are to be logged, possibly |
3418 | nowhere. The default is main and reject logs. */ | |
3419 | ||
3420 | if (log_reject_target != 0) | |
3421 | log_write(0, log_reject_target, "F=<%s> rejected by non-SMTP ACL: %s", | |
3422 | sender_address, log_msg); | |
3423 | ||
54cdb463 PH |
3424 | if (user_msg == NULL) user_msg = US"local configuration problem"; |
3425 | if (smtp_batched_input) | |
3426 | { | |
3427 | moan_smtp_batch(NULL, "%d %s", 550, user_msg); | |
3428 | /* Does not return */ | |
3429 | } | |
3430 | else | |
3431 | { | |
3432 | fseek(data_file, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3433 | give_local_error(ERRMESS_LOCAL_ACL, user_msg, | |
3434 | US"message rejected by non-SMTP ACL: ", error_rc, data_file, | |
3435 | header_list); | |
3436 | /* Does not return */ | |
3437 | } | |
059ec3d9 | 3438 | } |
578d43dc | 3439 | add_acl_headers(ACL_WHERE_NOTSMTP, US"non-SMTP"); |
059ec3d9 | 3440 | } |
059ec3d9 PH |
3441 | } |
3442 | ||
54cdb463 PH |
3443 | /* The applicable ACLs have been run */ |
3444 | ||
059ec3d9 PH |
3445 | if (deliver_freeze) frozen_by = US"ACL"; /* for later logging */ |
3446 | if (queue_only_policy) queued_by = US"ACL"; | |
059ec3d9 PH |
3447 | } |
3448 | ||
8523533c TK |
3449 | #ifdef WITH_CONTENT_SCAN |
3450 | unspool_mbox(); | |
3451 | #endif | |
3452 | ||
6a8f9482 TK |
3453 | #ifdef EXPERIMENTAL_DCC |
3454 | dcc_ok = 0; | |
3455 | #endif | |
3456 | ||
3457 | ||
059ec3d9 PH |
3458 | /* The final check on the message is to run the scan_local() function. The |
3459 | version supplied with Exim always accepts, but this is a hook for sysadmins to | |
3460 | supply their own checking code. The local_scan() function is run even when all | |
3461 | the recipients have been discarded. */ | |
3462 | ||
3463 | lseek(data_fd, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3464 | ||
3465 | /* Arrange to catch crashes in local_scan(), so that the -D file gets | |
3466 | deleted, and the incident gets logged. */ | |
3467 | ||
3468 | os_non_restarting_signal(SIGSEGV, local_scan_crash_handler); | |
3469 | os_non_restarting_signal(SIGFPE, local_scan_crash_handler); | |
3470 | os_non_restarting_signal(SIGILL, local_scan_crash_handler); | |
3471 | os_non_restarting_signal(SIGBUS, local_scan_crash_handler); | |
3472 | ||
3473 | DEBUG(D_receive) debug_printf("calling local_scan(); timeout=%d\n", | |
3474 | local_scan_timeout); | |
3475 | local_scan_data = NULL; | |
3476 | ||
3477 | os_non_restarting_signal(SIGALRM, local_scan_timeout_handler); | |
3478 | if (local_scan_timeout > 0) alarm(local_scan_timeout); | |
3479 | rc = local_scan(data_fd, &local_scan_data); | |
3480 | alarm(0); | |
3481 | os_non_restarting_signal(SIGALRM, sigalrm_handler); | |
3482 | ||
0e20aff9 MH |
3483 | enable_dollar_recipients = FALSE; |
3484 | ||
059ec3d9 PH |
3485 | store_pool = POOL_MAIN; /* In case changed */ |
3486 | DEBUG(D_receive) debug_printf("local_scan() returned %d %s\n", rc, | |
3487 | local_scan_data); | |
3488 | ||
3489 | os_non_restarting_signal(SIGSEGV, SIG_DFL); | |
3490 | os_non_restarting_signal(SIGFPE, SIG_DFL); | |
3491 | os_non_restarting_signal(SIGILL, SIG_DFL); | |
3492 | os_non_restarting_signal(SIGBUS, SIG_DFL); | |
3493 | ||
3494 | /* The length check is paranoia against some runaway code, and also because | |
3495 | (for a success return) lines in the spool file are read into big_buffer. */ | |
3496 | ||
3497 | if (local_scan_data != NULL) | |
3498 | { | |
3499 | int len = Ustrlen(local_scan_data); | |
3500 | if (len > LOCAL_SCAN_MAX_RETURN) len = LOCAL_SCAN_MAX_RETURN; | |
3501 | local_scan_data = string_copyn(local_scan_data, len); | |
3502 | } | |
3503 | ||
3504 | if (rc == LOCAL_SCAN_ACCEPT_FREEZE) | |
3505 | { | |
58eb016e | 3506 | if (!deliver_freeze) /* ACL might have already frozen */ |
059ec3d9 PH |
3507 | { |
3508 | deliver_freeze = TRUE; | |
3509 | deliver_frozen_at = time(NULL); | |
3510 | frozen_by = US"local_scan()"; | |
3511 | } | |
3512 | rc = LOCAL_SCAN_ACCEPT; | |
3513 | } | |
3514 | else if (rc == LOCAL_SCAN_ACCEPT_QUEUE) | |
3515 | { | |
3516 | if (!queue_only_policy) /* ACL might have already queued */ | |
3517 | { | |
3518 | queue_only_policy = TRUE; | |
3519 | queued_by = US"local_scan()"; | |
3520 | } | |
3521 | rc = LOCAL_SCAN_ACCEPT; | |
3522 | } | |
3523 | ||
3524 | /* Message accepted: remove newlines in local_scan_data because otherwise | |
3525 | the spool file gets corrupted. Ensure that all recipients are qualified. */ | |
3526 | ||
3527 | if (rc == LOCAL_SCAN_ACCEPT) | |
3528 | { | |
3529 | if (local_scan_data != NULL) | |
3530 | { | |
3531 | uschar *s; | |
3532 | for (s = local_scan_data; *s != 0; s++) if (*s == '\n') *s = ' '; | |
3533 | } | |
3534 | for (i = 0; i < recipients_count; i++) | |
3535 | { | |
3536 | recipient_item *r = recipients_list + i; | |
3537 | r->address = rewrite_address_qualify(r->address, TRUE); | |
3538 | if (r->errors_to != NULL) | |
3539 | r->errors_to = rewrite_address_qualify(r->errors_to, TRUE); | |
3540 | } | |
3541 | if (recipients_count == 0 && blackholed_by == NULL) | |
3542 | blackholed_by = US"local_scan"; | |
3543 | } | |
3544 | ||
3545 | /* Message rejected: newlines permitted in local_scan_data to generate | |
3546 | multiline SMTP responses. */ | |
3547 | ||
3548 | else | |
3549 | { | |
3550 | uschar *istemp = US""; | |
3551 | uschar *s = NULL; | |
a5bd321b | 3552 | uschar *smtp_code; |
059ec3d9 PH |
3553 | int size = 0; |
3554 | int sptr = 0; | |
059ec3d9 PH |
3555 | |
3556 | errmsg = local_scan_data; | |
3557 | ||
3558 | Uunlink(spool_name); /* Cancel this message */ | |
3559 | switch(rc) | |
3560 | { | |
3561 | default: | |
3562 | log_write(0, LOG_MAIN, "invalid return %d from local_scan(). Temporary " | |
3563 | "rejection given", rc); | |
3564 | goto TEMPREJECT; | |
3565 | ||
3566 | case LOCAL_SCAN_REJECT_NOLOGHDR: | |
3567 | log_extra_selector &= ~LX_rejected_header; | |
3568 | /* Fall through */ | |
3569 | ||
3570 | case LOCAL_SCAN_REJECT: | |
a5bd321b | 3571 | smtp_code = US"550"; |
059ec3d9 PH |
3572 | if (errmsg == NULL) errmsg = US"Administrative prohibition"; |
3573 | break; | |
3574 | ||
3575 | case LOCAL_SCAN_TEMPREJECT_NOLOGHDR: | |
3576 | log_extra_selector &= ~LX_rejected_header; | |
3577 | /* Fall through */ | |
3578 | ||
3579 | case LOCAL_SCAN_TEMPREJECT: | |
3580 | TEMPREJECT: | |
a5bd321b | 3581 | smtp_code = US"451"; |
059ec3d9 PH |
3582 | if (errmsg == NULL) errmsg = US"Temporary local problem"; |
3583 | istemp = US"temporarily "; | |
3584 | break; | |
3585 | } | |
3586 | ||
3587 | s = string_append(s, &size, &sptr, 2, US"F=", | |
3588 | (sender_address[0] == 0)? US"<>" : sender_address); | |
3589 | s = add_host_info_for_log(s, &size, &sptr); | |
3590 | s[sptr] = 0; | |
3591 | ||
3592 | log_write(0, LOG_MAIN|LOG_REJECT, "%s %srejected by local_scan(): %.256s", | |
3593 | s, istemp, string_printing(errmsg)); | |
3594 | ||
3595 | if (smtp_input) | |
3596 | { | |
3597 | if (!smtp_batched_input) | |
3598 | { | |
a5bd321b | 3599 | smtp_respond(smtp_code, 3, TRUE, errmsg); |
059ec3d9 PH |
3600 | message_id[0] = 0; /* Indicate no message accepted */ |
3601 | smtp_reply = US""; /* Indicate reply already sent */ | |
3602 | goto TIDYUP; /* Skip to end of function */ | |
3603 | } | |
3604 | else | |
3605 | { | |
a5bd321b | 3606 | moan_smtp_batch(NULL, "%s %s", smtp_code, errmsg); |
059ec3d9 PH |
3607 | /* Does not return */ |
3608 | } | |
3609 | } | |
3610 | else | |
3611 | { | |
3612 | fseek(data_file, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3613 | give_local_error(ERRMESS_LOCAL_SCAN, errmsg, | |
3614 | US"message rejected by local scan code: ", error_rc, data_file, | |
3615 | header_list); | |
3616 | /* Does not return */ | |
3617 | } | |
3618 | } | |
3619 | ||
3620 | /* Reset signal handlers to ignore signals that previously would have caused | |
3621 | the message to be abandoned. */ | |
3622 | ||
3623 | signal(SIGTERM, SIG_IGN); | |
3624 | signal(SIGINT, SIG_IGN); | |
3625 | ||
e4bdf652 | 3626 | |
059ec3d9 PH |
3627 | /* Ensure the first time flag is set in the newly-received message. */ |
3628 | ||
3629 | deliver_firsttime = TRUE; | |
3630 | ||
8523533c TK |
3631 | #ifdef EXPERIMENTAL_BRIGHTMAIL |
3632 | if (bmi_run == 1) { | |
3633 | /* rewind data file */ | |
3634 | lseek(data_fd, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3635 | bmi_verdicts = bmi_process_message(header_list, data_fd); | |
3636 | }; | |
3637 | #endif | |
3638 | ||
059ec3d9 PH |
3639 | /* Update the timstamp in our Received: header to account for any time taken by |
3640 | an ACL or by local_scan(). The new time is the time that all reception | |
3641 | processing is complete. */ | |
3642 | ||
3643 | timestamp = expand_string(US"${tod_full}"); | |
3644 | tslen = Ustrlen(timestamp); | |
3645 | ||
3646 | memcpy(received_header->text + received_header->slen - tslen - 1, | |
3647 | timestamp, tslen); | |
3648 | ||
3649 | /* In MUA wrapper mode, ignore queueing actions set by ACL or local_scan() */ | |
3650 | ||
3651 | if (mua_wrapper) | |
3652 | { | |
3653 | deliver_freeze = FALSE; | |
3654 | queue_only_policy = FALSE; | |
3655 | } | |
3656 | ||
3657 | /* Keep the data file open until we have written the header file, in order to | |
3658 | hold onto the lock. In a -bh run, or if the message is to be blackholed, we | |
3659 | don't write the header file, and we unlink the data file. If writing the header | |
3660 | file fails, we have failed to accept this message. */ | |
3661 | ||
3662 | if (host_checking || blackholed_by != NULL) | |
3663 | { | |
3664 | header_line *h; | |
3665 | Uunlink(spool_name); | |
3666 | msg_size = 0; /* Compute size for log line */ | |
3667 | for (h = header_list; h != NULL; h = h->next) | |
3668 | if (h->type != '*') msg_size += h->slen; | |
3669 | } | |
3670 | ||
3671 | /* Write the -H file */ | |
3672 | ||
3673 | else | |
3674 | { | |
3675 | if ((msg_size = spool_write_header(message_id, SW_RECEIVING, &errmsg)) < 0) | |
3676 | { | |
3677 | log_write(0, LOG_MAIN, "Message abandoned: %s", errmsg); | |
3678 | Uunlink(spool_name); /* Lose the data file */ | |
3679 | ||
3680 | if (smtp_input) | |
3681 | { | |
3682 | smtp_reply = US"451 Error in writing spool file"; | |
3683 | message_id[0] = 0; /* Indicate no message accepted */ | |
3684 | goto TIDYUP; | |
3685 | } | |
3686 | else | |
3687 | { | |
3688 | fseek(data_file, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3689 | give_local_error(ERRMESS_IOERR, errmsg, US"", error_rc, data_file, | |
3690 | header_list); | |
3691 | /* Does not return */ | |
3692 | } | |
3693 | } | |
3694 | } | |
3695 | ||
3696 | ||
3697 | /* The message has now been successfully received. */ | |
3698 | ||
3699 | receive_messagecount++; | |
3700 | ||
3701 | /* In SMTP sessions we may receive several in one connection. After each one, | |
3702 | we wait for the clock to tick at the level of message-id granularity. This is | |
3703 | so that the combination of time+pid is unique, even on systems where the pid | |
3704 | can be re-used within our time interval. We can't shorten the interval without | |
3705 | re-designing the message-id. See comments above where the message id is | |
3706 | created. This is Something For The Future. */ | |
3707 | ||
3708 | message_id_tv.tv_usec = (message_id_tv.tv_usec/id_resolution) * id_resolution; | |
3709 | exim_wait_tick(&message_id_tv, id_resolution); | |
3710 | ||
3711 | /* Add data size to written header size. We do not count the initial file name | |
3712 | that is in the file, but we do add one extra for the notional blank line that | |
3713 | precedes the data. This total differs from message_size in that it include the | |
3714 | added Received: header and any other headers that got created locally. */ | |
3715 | ||
3716 | fflush(data_file); | |
3717 | fstat(data_fd, &statbuf); | |
3718 | ||
3719 | msg_size += statbuf.st_size - SPOOL_DATA_START_OFFSET + 1; | |
3720 | ||
3721 | /* Generate a "message received" log entry. We do this by building up a dynamic | |
3722 | string as required. Since we commonly want to add two items at a time, use a | |
3723 | macro to simplify the coding. We log the arrival of a new message while the | |
3724 | file is still locked, just in case the machine is *really* fast, and delivers | |
3725 | it first! Include any message id that is in the message - since the syntax of a | |
3726 | message id is actually an addr-spec, we can use the parse routine to canonicize | |
3727 | it. */ | |
3728 | ||
3729 | size = 256; | |
3730 | sptr = 0; | |
3731 | s = store_get(size); | |
3732 | ||
3733 | s = string_append(s, &size, &sptr, 2, US"<= ", | |
3734 | (sender_address[0] == 0)? US"<>" : sender_address); | |
3735 | if (message_reference != NULL) | |
3736 | s = string_append(s, &size, &sptr, 2, US" R=", message_reference); | |
3737 | ||
3738 | s = add_host_info_for_log(s, &size, &sptr); | |
3739 | ||
3740 | #ifdef SUPPORT_TLS | |
817d9f57 JH |
3741 | if ((log_extra_selector & LX_tls_cipher) != 0 && tls_in.cipher != NULL) |
3742 | s = string_append(s, &size, &sptr, 2, US" X=", tls_in.cipher); | |
059ec3d9 | 3743 | if ((log_extra_selector & LX_tls_certificate_verified) != 0 && |
817d9f57 | 3744 | tls_in.cipher != NULL) |
059ec3d9 | 3745 | s = string_append(s, &size, &sptr, 2, US" CV=", |
817d9f57 JH |
3746 | tls_in.certificate_verified? "yes":"no"); |
3747 | if ((log_extra_selector & LX_tls_peerdn) != 0 && tls_in.peerdn != NULL) | |
48ed62d9 | 3748 | s = string_append(s, &size, &sptr, 3, US" DN=\"", |
817d9f57 JH |
3749 | string_printing(tls_in.peerdn), US"\""); |
3750 | if ((log_extra_selector & LX_tls_sni) != 0 && tls_in.sni != NULL) | |
3f0945ff | 3751 | s = string_append(s, &size, &sptr, 3, US" SNI=\"", |
817d9f57 | 3752 | string_printing(tls_in.sni), US"\""); |
3f0945ff | 3753 | #endif |
059ec3d9 PH |
3754 | |
3755 | if (sender_host_authenticated != NULL) | |
3756 | { | |
3757 | s = string_append(s, &size, &sptr, 2, US" A=", sender_host_authenticated); | |
3758 | if (authenticated_id != NULL) | |
c8e2fc1e | 3759 | { |
059ec3d9 | 3760 | s = string_append(s, &size, &sptr, 2, US":", authenticated_id); |
c8e2fc1e JH |
3761 | if (log_extra_selector & LX_smtp_mailauth && authenticated_sender != NULL) |
3762 | s = string_append(s, &size, &sptr, 2, US":", authenticated_sender); | |
3763 | } | |
059ec3d9 PH |
3764 | } |
3765 | ||
fd98a5c6 JH |
3766 | #ifdef EXPERIMENTAL_PRDR |
3767 | if (prdr_requested) | |
3768 | s = string_append(s, &size, &sptr, 1, US" PRDR"); | |
3769 | #endif | |
a3c86431 TL |
3770 | #ifdef EXPERIMENTAL_PROXY |
3771 | if (proxy_session && | |
3772 | (log_extra_selector & LX_proxy) != 0) | |
3773 | { | |
a3bddaa8 | 3774 | s = string_append(s, &size, &sptr, 2, US" PRX=", proxy_host_address); |
a3c86431 TL |
3775 | } |
3776 | #endif | |
fd98a5c6 | 3777 | |
059ec3d9 PH |
3778 | sprintf(CS big_buffer, "%d", msg_size); |
3779 | s = string_append(s, &size, &sptr, 2, US" S=", big_buffer); | |
3780 | ||
3c0a92dc JH |
3781 | /* log 8BITMIME mode announced in MAIL_FROM |
3782 | 0 ... no BODY= used | |
3783 | 7 ... 7BIT | |
3784 | 8 ... 8BITMIME */ | |
c8e2fc1e JH |
3785 | if (log_extra_selector & LX_8bitmime) |
3786 | { | |
3c0a92dc JH |
3787 | sprintf(CS big_buffer, "%d", body_8bitmime); |
3788 | s = string_append(s, &size, &sptr, 2, US" M8S=", big_buffer); | |
c8e2fc1e | 3789 | } |
3c0a92dc | 3790 | |
059ec3d9 PH |
3791 | /* If an addr-spec in a message-id contains a quoted string, it can contain |
3792 | any characters except " \ and CR and so in particular it can contain NL! | |
3793 | Therefore, make sure we use a printing-characters only version for the log. | |
3794 | Also, allow for domain literals in the message id. */ | |
3795 | ||
3796 | if (msgid_header != NULL) | |
3797 | { | |
3798 | uschar *old_id; | |
3799 | BOOL save_allow_domain_literals = allow_domain_literals; | |
3800 | allow_domain_literals = TRUE; | |
3801 | old_id = parse_extract_address(Ustrchr(msgid_header->text, ':') + 1, | |
3802 | &errmsg, &start, &end, &domain, FALSE); | |
3803 | allow_domain_literals = save_allow_domain_literals; | |
3804 | if (old_id != NULL) | |
3805 | s = string_append(s, &size, &sptr, 2, US" id=", string_printing(old_id)); | |
3806 | } | |
3807 | ||
3808 | /* If subject logging is turned on, create suitable printing-character | |
3809 | text. By expanding $h_subject: we make use of the MIME decoding. */ | |
3810 | ||
3811 | if ((log_extra_selector & LX_subject) != 0 && subject_header != NULL) | |
3812 | { | |
3813 | int i; | |
3814 | uschar *p = big_buffer; | |
3815 | uschar *ss = expand_string(US"$h_subject:"); | |
3816 | ||
3817 | /* Backslash-quote any double quotes or backslashes so as to make a | |
3818 | a C-like string, and turn any non-printers into escape sequences. */ | |
3819 | ||
3820 | *p++ = '\"'; | |
3821 | if (*ss != 0) for (i = 0; i < 100 && ss[i] != 0; i++) | |
3822 | { | |
3823 | if (ss[i] == '\"' || ss[i] == '\\') *p++ = '\\'; | |
3824 | *p++ = ss[i]; | |
3825 | } | |
3826 | *p++ = '\"'; | |
3827 | *p = 0; | |
3828 | s = string_append(s, &size, &sptr, 2, US" T=", string_printing(big_buffer)); | |
3829 | } | |
3830 | ||
3831 | /* Terminate the string: string_cat() and string_append() leave room, but do | |
3832 | not put the zero in. */ | |
3833 | ||
3834 | s[sptr] = 0; | |
3835 | ||
059ec3d9 PH |
3836 | /* Create a message log file if message logs are being used and this message is |
3837 | not blackholed. Write the reception stuff to it. We used to leave message log | |
e4bdf652 | 3838 | creation until the first delivery, but this has proved confusing for some |
059ec3d9 PH |
3839 | people. */ |
3840 | ||
3841 | if (message_logs && blackholed_by == NULL) | |
3842 | { | |
3843 | int fd; | |
3844 | ||
3845 | sprintf(CS spool_name, "%s/msglog/%s/%s", spool_directory, message_subdir, | |
3846 | message_id); | |
3847 | fd = Uopen(spool_name, O_WRONLY|O_APPEND|O_CREAT, SPOOL_MODE); | |
3848 | ||
3849 | if (fd < 0 && errno == ENOENT) | |
3850 | { | |
3851 | uschar temp[16]; | |
3852 | sprintf(CS temp, "msglog/%s", message_subdir); | |
3853 | if (message_subdir[0] == 0) temp[6] = 0; | |
3854 | (void)directory_make(spool_directory, temp, MSGLOG_DIRECTORY_MODE, TRUE); | |
3855 | fd = Uopen(spool_name, O_WRONLY|O_APPEND|O_CREAT, SPOOL_MODE); | |
3856 | } | |
3857 | ||
3858 | if (fd < 0) | |
3859 | { | |
3860 | log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't open message log %s: %s", | |
3861 | spool_name, strerror(errno)); | |
3862 | } | |
3863 | ||
3864 | else | |
3865 | { | |
3866 | FILE *message_log = fdopen(fd, "a"); | |
3867 | if (message_log == NULL) | |
3868 | { | |
3869 | log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't fdopen message log %s: %s", | |
3870 | spool_name, strerror(errno)); | |
f1e894f3 | 3871 | (void)close(fd); |
059ec3d9 PH |
3872 | } |
3873 | else | |
3874 | { | |
3875 | uschar *now = tod_stamp(tod_log); | |
3876 | fprintf(message_log, "%s Received from %s\n", now, s+3); | |
3877 | if (deliver_freeze) fprintf(message_log, "%s frozen by %s\n", now, | |
3878 | frozen_by); | |
3879 | if (queue_only_policy) fprintf(message_log, | |
3880 | "%s no immediate delivery: queued by %s\n", now, queued_by); | |
f1e894f3 | 3881 | (void)fclose(message_log); |
059ec3d9 PH |
3882 | } |
3883 | } | |
3884 | } | |
3885 | ||
58eb016e PH |
3886 | /* Everything has now been done for a successful message except logging its |
3887 | arrival, and outputting an SMTP response. While writing to the log, set a flag | |
3888 | to cause a call to receive_bomb_out() if the log cannot be opened. */ | |
3889 | ||
3890 | receive_call_bombout = TRUE; | |
3891 | ||
563b63fa PH |
3892 | /* Before sending an SMTP response in a TCP/IP session, we check to see if the |
3893 | connection has gone away. This can only be done if there is no unconsumed input | |
3894 | waiting in the local input buffer. We can test for this by calling | |
3895 | receive_smtp_buffered(). RFC 2920 (pipelining) explicitly allows for additional | |
3896 | input to be sent following the final dot, so the presence of following input is | |
3897 | not an error. | |
58eb016e | 3898 | |
563b63fa PH |
3899 | If the connection is still present, but there is no unread input for the |
3900 | socket, the result of a select() call will be zero. If, however, the connection | |
3901 | has gone away, or if there is pending input, the result of select() will be | |
3902 | non-zero. The two cases can be distinguished by trying to read the next input | |
3903 | character. If we succeed, we can unread it so that it remains in the local | |
3904 | buffer for handling later. If not, the connection has been lost. | |
58eb016e | 3905 | |
563b63fa PH |
3906 | Of course, since TCP/IP is asynchronous, there is always a chance that the |
3907 | connection will vanish between the time of this test and the sending of the | |
3908 | response, but the chance of this happening should be small. */ | |
3909 | ||
3910 | if (smtp_input && sender_host_address != NULL && !sender_host_notsocket && | |
3911 | !receive_smtp_buffered()) | |
58eb016e PH |
3912 | { |
3913 | struct timeval tv; | |
3914 | fd_set select_check; | |
3915 | FD_ZERO(&select_check); | |
3916 | FD_SET(fileno(smtp_in), &select_check); | |
3917 | tv.tv_sec = 0; | |
3918 | tv.tv_usec = 0; | |
3919 | ||
563b63fa | 3920 | if (select(fileno(smtp_in) + 1, &select_check, NULL, NULL, &tv) != 0) |
58eb016e | 3921 | { |
80a47a2c TK |
3922 | int c = (receive_getc)(); |
3923 | if (c != EOF) (receive_ungetc)(c); else | |
58eb016e | 3924 | { |
563b63fa PH |
3925 | uschar *msg = US"SMTP connection lost after final dot"; |
3926 | smtp_reply = US""; /* No attempt to send a response */ | |
3927 | smtp_yield = FALSE; /* Nothing more on this connection */ | |
58eb016e | 3928 | |
563b63fa | 3929 | /* Re-use the log line workspace */ |
58eb016e | 3930 | |
563b63fa PH |
3931 | sptr = 0; |
3932 | s = string_cat(s, &size, &sptr, msg, Ustrlen(msg)); | |
3933 | s = add_host_info_for_log(s, &size, &sptr); | |
3934 | s[sptr] = 0; | |
3935 | log_write(0, LOG_MAIN, "%s", s); | |
58eb016e | 3936 | |
563b63fa | 3937 | /* Delete the files for this aborted message. */ |
58eb016e | 3938 | |
563b63fa PH |
3939 | sprintf(CS spool_name, "%s/input/%s/%s-D", spool_directory, |
3940 | message_subdir, message_id); | |
3941 | Uunlink(spool_name); | |
58eb016e | 3942 | |
563b63fa PH |
3943 | sprintf(CS spool_name, "%s/input/%s/%s-H", spool_directory, |
3944 | message_subdir, message_id); | |
3945 | Uunlink(spool_name); | |
58eb016e | 3946 | |
563b63fa PH |
3947 | sprintf(CS spool_name, "%s/msglog/%s/%s", spool_directory, |
3948 | message_subdir, message_id); | |
3949 | Uunlink(spool_name); | |
58eb016e | 3950 | |
563b63fa PH |
3951 | goto TIDYUP; |
3952 | } | |
58eb016e PH |
3953 | } |
3954 | } | |
3955 | ||
3956 | /* The connection has not gone away; we really are going to take responsibility | |
3957 | for this message. */ | |
3958 | ||
817d9f57 | 3959 | /* Cutthrough - had sender last-dot; assume we've sent (or bufferred) all |
e4bdf652 JH |
3960 | data onward by now. |
3961 | ||
817d9f57 | 3962 | Send dot onward. If accepted, wipe the spooled files, log as delivered and accept |
e4bdf652 | 3963 | the sender's dot (below). |
817d9f57 JH |
3964 | If rejected: copy response to sender, wipe the spooled files, log approriately. |
3965 | If temp-reject: accept to sender, keep the spooled files. | |
e4bdf652 JH |
3966 | |
3967 | Having the normal spool files lets us do data-filtering, and store/forward on temp-reject. | |
817d9f57 JH |
3968 | |
3969 | XXX We do not handle queue-only, freezing, or blackholes. | |
e4bdf652 JH |
3970 | */ |
3971 | if(cutthrough_fd >= 0) | |
3972 | { | |
3973 | uschar * msg= cutthrough_finaldot(); /* Ask the target system to accept the messsage */ | |
817d9f57 | 3974 | /* Logging was done in finaldot() */ |
e4bdf652 | 3975 | switch(msg[0]) |
817d9f57 JH |
3976 | { |
3977 | case '2': /* Accept. Do the same to the source; dump any spoolfiles. */ | |
b784ce7f | 3978 | cutthrough_done = ACCEPTED; |
817d9f57 | 3979 | break; /* message_id needed for SMTP accept below */ |
61147df4 | 3980 | |
817d9f57 JH |
3981 | default: /* Unknown response, or error. Treat as temp-reject. */ |
3982 | case '4': /* Temp-reject. Keep spoolfiles and accept. */ | |
b784ce7f | 3983 | cutthrough_done = TMP_REJ; /* Avoid the usual immediate delivery attempt */ |
817d9f57 | 3984 | break; /* message_id needed for SMTP accept below */ |
61147df4 | 3985 | |
817d9f57 JH |
3986 | case '5': /* Perm-reject. Do the same to the source. Dump any spoolfiles */ |
3987 | smtp_reply= msg; /* Pass on the exact error */ | |
b784ce7f | 3988 | cutthrough_done = PERM_REJ; |
817d9f57 JH |
3989 | break; |
3990 | } | |
e4bdf652 | 3991 | } |
58eb016e | 3992 | |
fd98a5c6 JH |
3993 | if(smtp_reply == NULL |
3994 | #ifdef EXPERIMENTAL_PRDR | |
3995 | || prdr_requested | |
3996 | #endif | |
3997 | ) | |
e4bdf652 JH |
3998 | { |
3999 | log_write(0, LOG_MAIN | | |
4000 | (((log_extra_selector & LX_received_recipients) != 0)? LOG_RECIPIENTS : 0) | | |
4001 | (((log_extra_selector & LX_received_sender) != 0)? LOG_SENDER : 0), | |
4002 | "%s", s); | |
4003 | ||
4004 | /* Log any control actions taken by an ACL or local_scan(). */ | |
58eb016e | 4005 | |
e4bdf652 JH |
4006 | if (deliver_freeze) log_write(0, LOG_MAIN, "frozen by %s", frozen_by); |
4007 | if (queue_only_policy) log_write(L_delay_delivery, LOG_MAIN, | |
4008 | "no immediate delivery: queued by %s", queued_by); | |
4009 | } | |
4010 | receive_call_bombout = FALSE; | |
58eb016e | 4011 | |
059ec3d9 PH |
4012 | store_reset(s); /* The store for the main log message can be reused */ |
4013 | ||
4014 | /* If the message is frozen, and freeze_tell is set, do the telling. */ | |
4015 | ||
4016 | if (deliver_freeze && freeze_tell != NULL && freeze_tell[0] != 0) | |
4017 | { | |
4018 | moan_tell_someone(freeze_tell, NULL, US"Message frozen on arrival", | |
4019 | "Message %s was frozen on arrival by %s.\nThe sender is <%s>.\n", | |
4020 | message_id, frozen_by, sender_address); | |
4021 | } | |
4022 | ||
4023 | ||
4024 | /* Either a message has been successfully received and written to the two spool | |
4025 | files, or an error in writing the spool has occurred for an SMTP message, or | |
58eb016e PH |
4026 | an SMTP message has been rejected for policy reasons. (For a non-SMTP message |
4027 | we will have already given up because there's no point in carrying on!) In | |
4028 | either event, we must now close (and thereby unlock) the data file. In the | |
059ec3d9 PH |
4029 | successful case, this leaves the message on the spool, ready for delivery. In |
4030 | the error case, the spool file will be deleted. Then tidy up store, interact | |
4031 | with an SMTP call if necessary, and return. | |
4032 | ||
4033 | A fflush() was done earlier in the expectation that any write errors on the | |
4034 | data file will be flushed(!) out thereby. Nevertheless, it is theoretically | |
4035 | possible for fclose() to fail - but what to do? What has happened to the lock | |
4036 | if this happens? */ | |
4037 | ||
e4bdf652 | 4038 | |
059ec3d9 | 4039 | TIDYUP: |
f1e894f3 PH |
4040 | process_info[process_info_len] = 0; /* Remove message id */ |
4041 | if (data_file != NULL) (void)fclose(data_file); /* Frees the lock */ | |
059ec3d9 PH |
4042 | |
4043 | /* Now reset signal handlers to their defaults */ | |
4044 | ||
4045 | signal(SIGTERM, SIG_DFL); | |
4046 | signal(SIGINT, SIG_DFL); | |
4047 | ||
4048 | /* Tell an SMTP caller the state of play, and arrange to return the SMTP return | |
4049 | value, which defaults TRUE - meaning there may be more incoming messages from | |
4050 | this connection. For non-SMTP callers (where there is only ever one message), | |
4051 | the default is FALSE. */ | |
4052 | ||
4053 | if (smtp_input) | |
4054 | { | |
4055 | yield = smtp_yield; | |
4056 | ||
4057 | /* Handle interactive SMTP callers. After several kinds of error, smtp_reply | |
58eb016e PH |
4058 | is set to the response that should be sent. When it is NULL, we generate |
4059 | default responses. After an ACL error or local_scan() error, the response has | |
4060 | already been sent, and smtp_reply is an empty string to indicate this. */ | |
059ec3d9 PH |
4061 | |
4062 | if (!smtp_batched_input) | |
4063 | { | |
4064 | if (smtp_reply == NULL) | |
4065 | { | |
29aba418 | 4066 | if (fake_response != OK) |
a5bd321b PH |
4067 | smtp_respond((fake_response == DEFER)? US"450" : US"550", 3, TRUE, |
4068 | fake_response_text); | |
4e88a19f PH |
4069 | |
4070 | /* An OK response is required; use "message" text if present. */ | |
4071 | ||
4072 | else if (user_msg != NULL) | |
4073 | { | |
4074 | uschar *code = US"250"; | |
4075 | int len = 3; | |
4076 | smtp_message_code(&code, &len, &user_msg, NULL); | |
4077 | smtp_respond(code, len, TRUE, user_msg); | |
4078 | } | |
4079 | ||
4080 | /* Default OK response */ | |
4081 | ||
8e669ac1 PH |
4082 | else |
4083 | smtp_printf("250 OK id=%s\r\n", message_id); | |
059ec3d9 PH |
4084 | if (host_checking) |
4085 | fprintf(stdout, | |
4086 | "\n**** SMTP testing: that is not a real message id!\n\n"); | |
4087 | } | |
4e88a19f | 4088 | |
58eb016e | 4089 | /* smtp_reply is set non-empty */ |
4e88a19f | 4090 | |
8523533c TK |
4091 | else if (smtp_reply[0] != 0) |
4092 | { | |
29aba418 | 4093 | if (fake_response != OK && (smtp_reply[0] == '2')) |
a5bd321b PH |
4094 | smtp_respond((fake_response == DEFER)? US"450" : US"550", 3, TRUE, |
4095 | fake_response_text); | |
8e669ac1 | 4096 | else |
6951ac6c PH |
4097 | smtp_printf("%.1024s\r\n", smtp_reply); |
4098 | } | |
e4bdf652 | 4099 | |
817d9f57 JH |
4100 | switch (cutthrough_done) |
4101 | { | |
b784ce7f JH |
4102 | case ACCEPTED: log_write(0, LOG_MAIN, "Completed");/* Delivery was done */ |
4103 | case PERM_REJ: { /* Delete spool files */ | |
817d9f57 JH |
4104 | sprintf(CS spool_name, "%s/input/%s/%s-D", spool_directory, |
4105 | message_subdir, message_id); | |
4106 | Uunlink(spool_name); | |
4107 | sprintf(CS spool_name, "%s/input/%s/%s-H", spool_directory, | |
4108 | message_subdir, message_id); | |
4109 | Uunlink(spool_name); | |
4110 | sprintf(CS spool_name, "%s/msglog/%s/%s", spool_directory, | |
4111 | message_subdir, message_id); | |
4112 | Uunlink(spool_name); | |
4113 | } | |
b784ce7f | 4114 | case TMP_REJ: message_id[0] = 0; /* Prevent a delivery from starting */ |
817d9f57 | 4115 | default:break; |
e4bdf652 | 4116 | } |
817d9f57 | 4117 | cutthrough_delivery = FALSE; |
059ec3d9 PH |
4118 | } |
4119 | ||
4120 | /* For batched SMTP, generate an error message on failure, and do | |
4121 | nothing on success. The function moan_smtp_batch() does not return - | |
4122 | it exits from the program with a non-zero return code. */ | |
4123 | ||
4124 | else if (smtp_reply != NULL) moan_smtp_batch(NULL, "%s", smtp_reply); | |
4125 | } | |
4126 | ||
4127 | ||
4128 | /* If blackholing, we can immediately log this message's sad fate. The data | |
4129 | file has already been unlinked, and the header file was never written to disk. | |
4130 | We must now indicate that nothing was received, to prevent a delivery from | |
4131 | starting. */ | |
4132 | ||
4133 | if (blackholed_by != NULL) | |
4134 | { | |
4135 | uschar *detail = (local_scan_data != NULL)? | |
4136 | string_printing(local_scan_data) : | |
4137 | string_sprintf("(%s discarded recipients)", blackholed_by); | |
04f7d5b9 | 4138 | log_write(0, LOG_MAIN, "=> blackhole %s%s", detail, blackhole_log_msg); |
059ec3d9 PH |
4139 | log_write(0, LOG_MAIN, "Completed"); |
4140 | message_id[0] = 0; | |
4141 | } | |
4142 | ||
4143 | /* Reset headers so that logging of rejects for a subsequent message doesn't | |
4144 | include them. It is also important to set header_last = NULL before exiting | |
4145 | from this function, as this prevents certain rewrites that might happen during | |
4146 | subsequent verifying (of another incoming message) from trying to add headers | |
4147 | when they shouldn't. */ | |
4148 | ||
4149 | header_list = header_last = NULL; | |
4150 | ||
4151 | return yield; /* TRUE if more messages (SMTP only) */ | |
4152 | } | |
4153 | ||
4154 | /* End of receive.c */ |