Commit | Line | Data |
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059ec3d9 PH |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
80fea873 | 5 | /* Copyright (c) University of Cambridge 1995 - 2016 */ |
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 | 16 | #ifdef EXPERIMENTAL_DMARC |
c007c974 | 17 | # include "dmarc.h" |
4840604e TL |
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; | |
41313d92 | 26 | static uschar *spool_name = US""; |
059ec3d9 PH |
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 | |
55414b25 | 90 | match_address_list(qnewsender, TRUE, TRUE, CUSS &untrusted_set_sender, NULL, -1, |
059ec3d9 PH |
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 */ |
55414b25 | 145 | const 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":"; | |
55414b25 JH |
152 | while ((path = string_nextinlist(&p, &sep, buffer, sizeof(buffer)))) |
153 | if (Ustrcmp(path, "syslog") != 0) | |
154 | break; | |
059ec3d9 | 155 | |
5cb8cbc6 PH |
156 | if (path == NULL) /* No log files */ |
157 | { | |
8e669ac1 PH |
158 | *inodeptr = -1; |
159 | return -1; | |
160 | } | |
059ec3d9 | 161 | |
8e669ac1 PH |
162 | /* An empty string means use the default, which is in the spool directory. |
163 | But don't just use the spool directory, as it is possible that the log | |
5cb8cbc6 | 164 | subdirectory has been symbolically linked elsewhere. */ |
059ec3d9 | 165 | |
8e669ac1 | 166 | if (path[0] == 0) |
059ec3d9 | 167 | { |
5cb8cbc6 PH |
168 | sprintf(CS buffer, CS"%s/log", CS spool_directory); |
169 | path = buffer; | |
8e669ac1 PH |
170 | } |
171 | else | |
059ec3d9 | 172 | { |
8e669ac1 | 173 | uschar *cp; |
5cb8cbc6 | 174 | if ((cp = Ustrrchr(path, '/')) != NULL) *cp = 0; |
8e669ac1 | 175 | } |
5cb8cbc6 | 176 | } |
8e669ac1 | 177 | |
8f128379 | 178 | /* We now have the path; do the business */ |
5cb8cbc6 PH |
179 | |
180 | memset(&statbuf, 0, sizeof(statbuf)); | |
181 | ||
182 | if (STATVFS(CS path, &statbuf) != 0) | |
183 | { | |
184 | log_write(0, LOG_MAIN|LOG_PANIC, "cannot accept message: failed to stat " | |
185 | "%s directory %s: %s", name, spool_directory, strerror(errno)); | |
186 | smtp_closedown(US"spool or log directory problem"); | |
187 | exim_exit(EXIT_FAILURE); | |
188 | } | |
8e669ac1 | 189 | |
5cb8cbc6 PH |
190 | *inodeptr = (statbuf.F_FILES > 0)? statbuf.F_FAVAIL : -1; |
191 | ||
192 | /* Disks are getting huge. Take care with computing the size in kilobytes. */ | |
8e669ac1 | 193 | |
5cb8cbc6 PH |
194 | return (int)(((double)statbuf.F_BAVAIL * (double)statbuf.F_FRSIZE)/1024.0); |
195 | ||
196 | /* Unable to find partition sizes in this environment. */ | |
197 | ||
198 | #else | |
199 | *inodeptr = -1; | |
200 | return -1; | |
201 | #endif | |
202 | } | |
203 | ||
059ec3d9 | 204 | |
059ec3d9 | 205 | |
5cb8cbc6 PH |
206 | |
207 | /************************************************* | |
208 | * Check space on spool and log partitions * | |
209 | *************************************************/ | |
210 | ||
211 | /* This function is called before accepting a message; if any thresholds are | |
212 | set, it checks them. If a message_size is supplied, it checks that there is | |
213 | enough space for that size plus the threshold - i.e. that the message won't | |
214 | reduce the space to the threshold. Not all OS have statvfs(); for those that | |
215 | don't, this function always returns TRUE. For some OS the old function and | |
216 | struct name statfs is used; that is handled by a macro, defined in exim.h. | |
217 | ||
218 | Arguments: | |
219 | msg_size the (estimated) size of an incoming message | |
220 | ||
221 | Returns: FALSE if there isn't enough space, or if the information cannot | |
222 | be obtained | |
223 | TRUE if no check was done or there is enough space | |
224 | */ | |
225 | ||
226 | BOOL | |
227 | receive_check_fs(int msg_size) | |
228 | { | |
229 | int space, inodes; | |
230 | ||
231 | if (check_spool_space > 0 || msg_size > 0 || check_spool_inodes > 0) | |
232 | { | |
8e669ac1 PH |
233 | space = receive_statvfs(TRUE, &inodes); |
234 | ||
059ec3d9 | 235 | DEBUG(D_receive) |
5cb8cbc6 PH |
236 | debug_printf("spool directory space = %dK inodes = %d " |
237 | "check_space = %dK inodes = %d msg_size = %d\n", | |
238 | space, inodes, check_spool_space, check_spool_inodes, msg_size); | |
8e669ac1 PH |
239 | |
240 | if ((space >= 0 && space < check_spool_space) || | |
5cb8cbc6 | 241 | (inodes >= 0 && inodes < check_spool_inodes)) |
8e669ac1 | 242 | { |
5cb8cbc6 PH |
243 | log_write(0, LOG_MAIN, "spool directory space check failed: space=%d " |
244 | "inodes=%d", space, inodes); | |
059ec3d9 PH |
245 | return FALSE; |
246 | } | |
247 | } | |
248 | ||
5cb8cbc6 PH |
249 | if (check_log_space > 0 || check_log_inodes > 0) |
250 | { | |
8e669ac1 PH |
251 | space = receive_statvfs(FALSE, &inodes); |
252 | ||
5cb8cbc6 PH |
253 | DEBUG(D_receive) |
254 | debug_printf("log directory space = %dK inodes = %d " | |
255 | "check_space = %dK inodes = %d\n", | |
256 | space, inodes, check_log_space, check_log_inodes); | |
8e669ac1 PH |
257 | |
258 | if ((space >= 0 && space < check_log_space) || | |
5cb8cbc6 | 259 | (inodes >= 0 && inodes < check_log_inodes)) |
8e669ac1 | 260 | { |
5cb8cbc6 PH |
261 | log_write(0, LOG_MAIN, "log directory space check failed: space=%d " |
262 | "inodes=%d", space, inodes); | |
263 | return FALSE; | |
264 | } | |
8e669ac1 PH |
265 | } |
266 | ||
059ec3d9 PH |
267 | return TRUE; |
268 | } | |
269 | ||
270 | ||
271 | ||
272 | /************************************************* | |
273 | * Bomb out while reading a message * | |
274 | *************************************************/ | |
275 | ||
276 | /* The common case of wanting to bomb out is if a SIGTERM or SIGINT is | |
277 | received, or if there is a timeout. A rarer case might be if the log files are | |
278 | screwed up and Exim can't open them to record a message's arrival. Handling | |
279 | that case is done by setting a flag to cause the log functions to call this | |
280 | function if there is an ultimate disaster. That is why it is globally | |
281 | accessible. | |
282 | ||
8f128379 PH |
283 | Arguments: |
284 | reason text reason to pass to the not-quit ACL | |
285 | msg default SMTP response to give if in an SMTP session | |
059ec3d9 PH |
286 | Returns: it doesn't |
287 | */ | |
288 | ||
289 | void | |
8f128379 | 290 | receive_bomb_out(uschar *reason, uschar *msg) |
059ec3d9 | 291 | { |
ead37e6c PP |
292 | static BOOL already_bombing_out; |
293 | /* The smtp_notquit_exit() below can call ACLs which can trigger recursive | |
294 | timeouts, if someone has something slow in their quit ACL. Since the only | |
295 | things we should be doing are to close down cleanly ASAP, on the second | |
296 | pass we also close down stuff that might be opened again, before bypassing | |
297 | the ACL call and exiting. */ | |
298 | ||
059ec3d9 PH |
299 | /* If spool_name is set, it contains the name of the data file that is being |
300 | written. Unlink it before closing so that it cannot be picked up by a delivery | |
301 | process. Ensure that any header file is also removed. */ | |
302 | ||
ead37e6c | 303 | if (spool_name[0] != '\0') |
059ec3d9 PH |
304 | { |
305 | Uunlink(spool_name); | |
306 | spool_name[Ustrlen(spool_name) - 1] = 'H'; | |
307 | Uunlink(spool_name); | |
ead37e6c | 308 | spool_name[0] = '\0'; |
059ec3d9 PH |
309 | } |
310 | ||
311 | /* Now close the file if it is open, either as a fd or a stream. */ | |
312 | ||
ead37e6c PP |
313 | if (data_file != NULL) |
314 | { | |
315 | (void)fclose(data_file); | |
316 | data_file = NULL; | |
317 | } else if (data_fd >= 0) { | |
318 | (void)close(data_fd); | |
319 | data_fd = -1; | |
320 | } | |
059ec3d9 | 321 | |
8f128379 PH |
322 | /* Attempt to close down an SMTP connection tidily. For non-batched SMTP, call |
323 | smtp_notquit_exit(), which runs the NOTQUIT ACL, if present, and handles the | |
324 | SMTP response. */ | |
059ec3d9 | 325 | |
ead37e6c | 326 | if (!already_bombing_out) |
059ec3d9 | 327 | { |
ead37e6c PP |
328 | already_bombing_out = TRUE; |
329 | if (smtp_input) | |
330 | { | |
331 | if (smtp_batched_input) | |
332 | moan_smtp_batch(NULL, "421 %s - message abandoned", msg); /* No return */ | |
333 | smtp_notquit_exit(reason, US"421", US"%s %s - closing connection.", | |
334 | smtp_active_hostname, msg); | |
335 | } | |
059ec3d9 PH |
336 | } |
337 | ||
338 | /* Exit from the program (non-BSMTP cases) */ | |
339 | ||
340 | exim_exit(EXIT_FAILURE); | |
341 | } | |
342 | ||
343 | ||
344 | /************************************************* | |
345 | * Data read timeout * | |
346 | *************************************************/ | |
347 | ||
348 | /* Handler function for timeouts that occur while reading the data that | |
349 | comprises a message. | |
350 | ||
351 | Argument: the signal number | |
352 | Returns: nothing | |
353 | */ | |
354 | ||
355 | static void | |
356 | data_timeout_handler(int sig) | |
357 | { | |
358 | uschar *msg = NULL; | |
359 | ||
360 | sig = sig; /* Keep picky compilers happy */ | |
361 | ||
362 | if (smtp_input) | |
363 | { | |
364 | msg = US"SMTP incoming data timeout"; | |
365 | log_write(L_lost_incoming_connection, | |
366 | LOG_MAIN, "SMTP data timeout (message abandoned) on connection " | |
fed77020 PH |
367 | "from %s F=<%s>", |
368 | (sender_fullhost != NULL)? sender_fullhost : US"local process", | |
369 | sender_address); | |
059ec3d9 PH |
370 | } |
371 | else | |
372 | { | |
373 | fprintf(stderr, "exim: timed out while reading - message abandoned\n"); | |
374 | log_write(L_lost_incoming_connection, | |
375 | LOG_MAIN, "timed out while reading local message"); | |
376 | } | |
377 | ||
8f128379 | 378 | receive_bomb_out(US"data-timeout", msg); /* Does not return */ |
059ec3d9 PH |
379 | } |
380 | ||
381 | ||
382 | ||
383 | /************************************************* | |
384 | * local_scan() timeout * | |
385 | *************************************************/ | |
386 | ||
387 | /* Handler function for timeouts that occur while running a local_scan() | |
388 | function. | |
389 | ||
390 | Argument: the signal number | |
391 | Returns: nothing | |
392 | */ | |
393 | ||
394 | static void | |
395 | local_scan_timeout_handler(int sig) | |
396 | { | |
397 | sig = sig; /* Keep picky compilers happy */ | |
398 | log_write(0, LOG_MAIN|LOG_REJECT, "local_scan() function timed out - " | |
399 | "message temporarily rejected (size %d)", message_size); | |
8f128379 PH |
400 | /* Does not return */ |
401 | receive_bomb_out(US"local-scan-timeout", US"local verification problem"); | |
059ec3d9 PH |
402 | } |
403 | ||
404 | ||
405 | ||
406 | /************************************************* | |
407 | * local_scan() crashed * | |
408 | *************************************************/ | |
409 | ||
410 | /* Handler function for signals that occur while running a local_scan() | |
411 | function. | |
412 | ||
413 | Argument: the signal number | |
414 | Returns: nothing | |
415 | */ | |
416 | ||
417 | static void | |
418 | local_scan_crash_handler(int sig) | |
419 | { | |
420 | log_write(0, LOG_MAIN|LOG_REJECT, "local_scan() function crashed with " | |
421 | "signal %d - message temporarily rejected (size %d)", sig, message_size); | |
8f128379 PH |
422 | /* Does not return */ |
423 | receive_bomb_out(US"local-scan-error", US"local verification problem"); | |
059ec3d9 PH |
424 | } |
425 | ||
426 | ||
427 | /************************************************* | |
428 | * SIGTERM or SIGINT received * | |
429 | *************************************************/ | |
430 | ||
431 | /* Handler for SIGTERM or SIGINT signals that occur while reading the | |
432 | data that comprises a message. | |
433 | ||
434 | Argument: the signal number | |
435 | Returns: nothing | |
436 | */ | |
437 | ||
438 | static void | |
439 | data_sigterm_sigint_handler(int sig) | |
440 | { | |
441 | uschar *msg = NULL; | |
442 | ||
443 | if (smtp_input) | |
444 | { | |
445 | msg = US"Service not available - SIGTERM or SIGINT received"; | |
446 | log_write(0, LOG_MAIN, "%s closed after %s", smtp_get_connection_info(), | |
447 | (sig == SIGTERM)? "SIGTERM" : "SIGINT"); | |
448 | } | |
449 | else | |
450 | { | |
f05da2e8 | 451 | if (filter_test == FTEST_NONE) |
059ec3d9 PH |
452 | { |
453 | fprintf(stderr, "\nexim: %s received - message abandoned\n", | |
454 | (sig == SIGTERM)? "SIGTERM" : "SIGINT"); | |
455 | log_write(0, LOG_MAIN, "%s received while reading local message", | |
456 | (sig == SIGTERM)? "SIGTERM" : "SIGINT"); | |
457 | } | |
458 | } | |
459 | ||
8f128379 | 460 | receive_bomb_out(US"signal-exit", msg); /* Does not return */ |
059ec3d9 PH |
461 | } |
462 | ||
463 | ||
464 | ||
465 | /************************************************* | |
466 | * Add new recipient to list * | |
467 | *************************************************/ | |
468 | ||
469 | /* This function builds a list of recipient addresses in argc/argv | |
470 | format. | |
471 | ||
472 | Arguments: | |
473 | recipient the next address to add to recipients_list | |
474 | pno parent number for fixed aliases; -1 otherwise | |
475 | ||
476 | Returns: nothing | |
477 | */ | |
478 | ||
479 | void | |
480 | receive_add_recipient(uschar *recipient, int pno) | |
481 | { | |
482 | if (recipients_count >= recipients_list_max) | |
483 | { | |
484 | recipient_item *oldlist = recipients_list; | |
485 | int oldmax = recipients_list_max; | |
486 | recipients_list_max = recipients_list_max? 2*recipients_list_max : 50; | |
487 | recipients_list = store_get(recipients_list_max * sizeof(recipient_item)); | |
488 | if (oldlist != NULL) | |
489 | memcpy(recipients_list, oldlist, oldmax * sizeof(recipient_item)); | |
490 | } | |
491 | ||
492 | recipients_list[recipients_count].address = recipient; | |
493 | recipients_list[recipients_count].pno = pno; | |
8523533c TK |
494 | #ifdef EXPERIMENTAL_BRIGHTMAIL |
495 | recipients_list[recipients_count].bmi_optin = bmi_current_optin; | |
496 | /* reset optin string pointer for next recipient */ | |
497 | bmi_current_optin = NULL; | |
498 | #endif | |
6c1c3d1d WB |
499 | recipients_list[recipients_count].orcpt = NULL; |
500 | recipients_list[recipients_count].dsn_flags = 0; | |
059ec3d9 PH |
501 | recipients_list[recipients_count++].errors_to = NULL; |
502 | } | |
503 | ||
504 | ||
505 | ||
506 | ||
fd98a5c6 JH |
507 | /************************************************* |
508 | * Send user response message * | |
509 | *************************************************/ | |
61147df4 | 510 | |
fd98a5c6 JH |
511 | /* This function is passed a default response code and a user message. It calls |
512 | smtp_message_code() to check and possibly modify the response code, and then | |
513 | calls smtp_respond() to transmit the response. I put this into a function | |
514 | just to avoid a lot of repetition. | |
61147df4 PP |
515 | |
516 | Arguments: | |
fd98a5c6 JH |
517 | code the response code |
518 | user_msg the user message | |
519 | ||
520 | Returns: nothing | |
61147df4 PP |
521 | */ |
522 | ||
8ccd00b1 | 523 | #ifndef DISABLE_PRDR |
61147df4 | 524 | static void |
fd98a5c6 | 525 | smtp_user_msg(uschar *code, uschar *user_msg) |
61147df4 | 526 | { |
fd98a5c6 | 527 | int len = 3; |
4f6ae5c3 | 528 | smtp_message_code(&code, &len, &user_msg, NULL, TRUE); |
fd98a5c6 | 529 | smtp_respond(code, len, TRUE, user_msg); |
61147df4 PP |
530 | } |
531 | #endif | |
532 | ||
533 | ||
534 | ||
535 | ||
fd98a5c6 | 536 | |
059ec3d9 PH |
537 | /************************************************* |
538 | * Remove a recipient from the list * | |
539 | *************************************************/ | |
540 | ||
541 | /* This function is provided for local_scan() to use. | |
542 | ||
543 | Argument: | |
544 | recipient address to remove | |
545 | ||
546 | Returns: TRUE if it did remove something; FALSE otherwise | |
547 | */ | |
548 | ||
549 | BOOL | |
550 | receive_remove_recipient(uschar *recipient) | |
551 | { | |
552 | int count; | |
553 | DEBUG(D_receive) debug_printf("receive_remove_recipient(\"%s\") called\n", | |
554 | recipient); | |
555 | for (count = 0; count < recipients_count; count++) | |
556 | { | |
557 | if (Ustrcmp(recipients_list[count].address, recipient) == 0) | |
558 | { | |
559 | if ((--recipients_count - count) > 0) | |
560 | memmove(recipients_list + count, recipients_list + count + 1, | |
54cdb463 | 561 | (recipients_count - count)*sizeof(recipient_item)); |
059ec3d9 PH |
562 | return TRUE; |
563 | } | |
564 | } | |
565 | return FALSE; | |
566 | } | |
567 | ||
568 | ||
569 | ||
570 | ||
571 | ||
572 | /************************************************* | |
573 | * Read data portion of a non-SMTP message * | |
574 | *************************************************/ | |
575 | ||
576 | /* This function is called to read the remainder of a message (following the | |
577 | header) when the input is not from SMTP - we are receiving a local message on | |
578 | a standard input stream. The message is always terminated by EOF, and is also | |
579 | terminated by a dot on a line by itself if the flag dot_ends is TRUE. Split the | |
580 | two cases for maximum efficiency. | |
581 | ||
582 | Ensure that the body ends with a newline. This will naturally be the case when | |
583 | the termination is "\n.\n" but may not be otherwise. The RFC defines messages | |
584 | as "sequences of lines" - this of course strictly applies only to SMTP, but | |
585 | deliveries into BSD-type mailbox files also require it. Exim used to have a | |
586 | flag for doing this at delivery time, but as it was always set for all | |
587 | transports, I decided to simplify things by putting the check here instead. | |
588 | ||
589 | There is at least one MUA (dtmail) that sends CRLF via this interface, and | |
590 | other programs are known to do this as well. Exim used to have a option for | |
591 | dealing with this: in July 2003, after much discussion, the code has been | |
592 | changed to default to treat any of LF, CRLF, and bare CR as line terminators. | |
593 | ||
594 | However, for the case when a dot on a line by itself terminates a message, the | |
595 | only recognized terminating sequences before and after the dot are LF and CRLF. | |
596 | Otherwise, having read EOL . CR, you don't know whether to read another | |
597 | character or not. | |
598 | ||
599 | Internally, in messages stored in Exim's spool files, LF is used as the line | |
600 | terminator. Under the new regime, bare CRs will no longer appear in these | |
601 | files. | |
602 | ||
603 | Arguments: | |
604 | fout a FILE to which to write the message | |
605 | ||
606 | Returns: One of the END_xxx values indicating why it stopped reading | |
607 | */ | |
608 | ||
609 | static int | |
610 | read_message_data(FILE *fout) | |
611 | { | |
612 | int ch_state; | |
613 | register int ch; | |
d677b2f2 | 614 | register int linelength = 0; |
059ec3d9 PH |
615 | |
616 | /* Handle the case when only EOF terminates the message */ | |
617 | ||
618 | if (!dot_ends) | |
619 | { | |
620 | register int last_ch = '\n'; | |
621 | ||
80a47a2c | 622 | for (; (ch = (receive_getc)()) != EOF; last_ch = ch) |
059ec3d9 PH |
623 | { |
624 | if (ch == 0) body_zerocount++; | |
625 | if (last_ch == '\r' && ch != '\n') | |
626 | { | |
d677b2f2 PH |
627 | if (linelength > max_received_linelength) |
628 | max_received_linelength = linelength; | |
629 | linelength = 0; | |
059ec3d9 PH |
630 | if (fputc('\n', fout) == EOF) return END_WERROR; |
631 | message_size++; | |
632 | body_linecount++; | |
633 | } | |
634 | if (ch == '\r') continue; | |
635 | ||
636 | if (fputc(ch, fout) == EOF) return END_WERROR; | |
d677b2f2 PH |
637 | if (ch == '\n') |
638 | { | |
639 | if (linelength > max_received_linelength) | |
640 | max_received_linelength = linelength; | |
641 | linelength = 0; | |
642 | body_linecount++; | |
643 | } | |
644 | else linelength++; | |
059ec3d9 PH |
645 | if (++message_size > thismessage_size_limit) return END_SIZE; |
646 | } | |
647 | ||
648 | if (last_ch != '\n') | |
649 | { | |
d677b2f2 PH |
650 | if (linelength > max_received_linelength) |
651 | max_received_linelength = linelength; | |
059ec3d9 PH |
652 | if (fputc('\n', fout) == EOF) return END_WERROR; |
653 | message_size++; | |
654 | body_linecount++; | |
655 | } | |
656 | ||
657 | return END_EOF; | |
658 | } | |
659 | ||
660 | /* Handle the case when a dot on a line on its own, or EOF, terminates. */ | |
661 | ||
662 | ch_state = 1; | |
663 | ||
80a47a2c | 664 | while ((ch = (receive_getc)()) != EOF) |
059ec3d9 PH |
665 | { |
666 | if (ch == 0) body_zerocount++; | |
667 | switch (ch_state) | |
668 | { | |
669 | case 0: /* Normal state (previous char written) */ | |
670 | if (ch == '\n') | |
d677b2f2 PH |
671 | { |
672 | body_linecount++; | |
673 | if (linelength > max_received_linelength) | |
674 | max_received_linelength = linelength; | |
675 | linelength = -1; | |
676 | ch_state = 1; | |
677 | } | |
059ec3d9 PH |
678 | else if (ch == '\r') |
679 | { ch_state = 2; continue; } | |
680 | break; | |
681 | ||
682 | case 1: /* After written "\n" */ | |
683 | if (ch == '.') { ch_state = 3; continue; } | |
6eb02f88 | 684 | if (ch == '\r') { ch_state = 2; continue; } |
3581f321 JH |
685 | if (ch == '\n') { body_linecount++; linelength = -1; } |
686 | else ch_state = 0; | |
059ec3d9 PH |
687 | break; |
688 | ||
689 | case 2: | |
690 | body_linecount++; /* After unwritten "\r" */ | |
d677b2f2 PH |
691 | if (linelength > max_received_linelength) |
692 | max_received_linelength = linelength; | |
059ec3d9 | 693 | if (ch == '\n') |
d677b2f2 PH |
694 | { |
695 | ch_state = 1; | |
696 | linelength = -1; | |
697 | } | |
059ec3d9 PH |
698 | else |
699 | { | |
700 | if (message_size++, fputc('\n', fout) == EOF) return END_WERROR; | |
701 | if (ch == '\r') continue; | |
702 | ch_state = 0; | |
d677b2f2 | 703 | linelength = 0; |
059ec3d9 PH |
704 | } |
705 | break; | |
706 | ||
707 | case 3: /* After "\n." (\n written, dot not) */ | |
708 | if (ch == '\n') return END_DOT; | |
709 | if (ch == '\r') { ch_state = 4; continue; } | |
710 | message_size++; | |
d677b2f2 | 711 | linelength++; |
059ec3d9 PH |
712 | if (fputc('.', fout) == EOF) return END_WERROR; |
713 | ch_state = 0; | |
714 | break; | |
715 | ||
716 | case 4: /* After "\n.\r" (\n written, rest not) */ | |
717 | if (ch == '\n') return END_DOT; | |
718 | message_size += 2; | |
719 | body_linecount++; | |
720 | if (fputs(".\n", fout) == EOF) return END_WERROR; | |
721 | if (ch == '\r') { ch_state = 2; continue; } | |
722 | ch_state = 0; | |
723 | break; | |
724 | } | |
725 | ||
d677b2f2 | 726 | linelength++; |
059ec3d9 PH |
727 | if (fputc(ch, fout) == EOF) return END_WERROR; |
728 | if (++message_size > thismessage_size_limit) return END_SIZE; | |
729 | } | |
730 | ||
731 | /* Get here if EOF read. Unless we have just written "\n", we need to ensure | |
732 | the message ends with a newline, and we must also write any characters that | |
733 | were saved up while testing for an ending dot. */ | |
734 | ||
735 | if (ch_state != 1) | |
736 | { | |
737 | static uschar *ends[] = { US"\n", NULL, US"\n", US".\n", US".\n" }; | |
738 | if (fputs(CS ends[ch_state], fout) == EOF) return END_WERROR; | |
739 | message_size += Ustrlen(ends[ch_state]); | |
740 | body_linecount++; | |
741 | } | |
742 | ||
743 | return END_EOF; | |
744 | } | |
745 | ||
746 | ||
747 | ||
748 | ||
749 | /************************************************* | |
750 | * Read data portion of an SMTP message * | |
751 | *************************************************/ | |
752 | ||
753 | /* This function is called to read the remainder of an SMTP message (after the | |
754 | headers), or to skip over it when an error has occurred. In this case, the | |
755 | output file is passed as NULL. | |
756 | ||
757 | If any line begins with a dot, that character is skipped. The input should only | |
758 | be successfully terminated by CR LF . CR LF unless it is local (non-network) | |
759 | SMTP, in which case the CRs are optional, but... | |
760 | ||
761 | FUDGE: It seems that sites on the net send out messages with just LF | |
762 | terminators, despite the warnings in the RFCs, and other MTAs handle this. So | |
763 | we make the CRs optional in all cases. | |
764 | ||
765 | July 2003: Bare CRs cause trouble. We now treat them as line terminators as | |
766 | well, so that there are no CRs in spooled messages. However, the message | |
767 | terminating dot is not recognized between two bare CRs. | |
768 | ||
769 | Arguments: | |
770 | fout a FILE to which to write the message; NULL if skipping | |
771 | ||
772 | Returns: One of the END_xxx values indicating why it stopped reading | |
773 | */ | |
774 | ||
775 | static int | |
776 | read_message_data_smtp(FILE *fout) | |
777 | { | |
778 | int ch_state = 0; | |
e4bdf652 | 779 | int ch; |
7e3ce68e | 780 | int linelength = 0; |
059ec3d9 | 781 | |
80a47a2c | 782 | while ((ch = (receive_getc)()) != EOF) |
059ec3d9 PH |
783 | { |
784 | if (ch == 0) body_zerocount++; | |
785 | switch (ch_state) | |
786 | { | |
787 | case 0: /* After LF or CRLF */ | |
788 | if (ch == '.') | |
789 | { | |
790 | ch_state = 3; | |
791 | continue; /* Don't ever write . after LF */ | |
792 | } | |
793 | ch_state = 1; | |
794 | ||
795 | /* Else fall through to handle as normal uschar. */ | |
796 | ||
797 | case 1: /* Normal state */ | |
798 | if (ch == '\n') | |
799 | { | |
800 | ch_state = 0; | |
801 | body_linecount++; | |
1f5497b2 PH |
802 | if (linelength > max_received_linelength) |
803 | max_received_linelength = linelength; | |
804 | linelength = -1; | |
059ec3d9 PH |
805 | } |
806 | else if (ch == '\r') | |
807 | { | |
808 | ch_state = 2; | |
809 | continue; | |
810 | } | |
811 | break; | |
812 | ||
813 | case 2: /* After (unwritten) CR */ | |
814 | body_linecount++; | |
1f5497b2 PH |
815 | if (linelength > max_received_linelength) |
816 | max_received_linelength = linelength; | |
817 | linelength = -1; | |
059ec3d9 PH |
818 | if (ch == '\n') |
819 | { | |
820 | ch_state = 0; | |
821 | } | |
822 | else | |
823 | { | |
824 | message_size++; | |
825 | if (fout != NULL && fputc('\n', fout) == EOF) return END_WERROR; | |
e4bdf652 | 826 | (void) cutthrough_put_nl(); |
059ec3d9 PH |
827 | if (ch != '\r') ch_state = 1; else continue; |
828 | } | |
829 | break; | |
830 | ||
831 | case 3: /* After [CR] LF . */ | |
832 | if (ch == '\n') | |
833 | return END_DOT; | |
834 | if (ch == '\r') | |
835 | { | |
836 | ch_state = 4; | |
837 | continue; | |
838 | } | |
1bc460a6 JH |
839 | /* The dot was removed at state 3. For a doubled dot, here, reinstate |
840 | it to cutthrough. The current ch, dot or not, is passed both to cutthrough | |
841 | and to file below. */ | |
842 | if (ch == '.') | |
843 | { | |
844 | uschar c= ch; | |
845 | (void) cutthrough_puts(&c, 1); | |
846 | } | |
847 | ch_state = 1; | |
059ec3d9 PH |
848 | break; |
849 | ||
850 | case 4: /* After [CR] LF . CR */ | |
851 | if (ch == '\n') return END_DOT; | |
852 | message_size++; | |
853 | body_linecount++; | |
854 | if (fout != NULL && fputc('\n', fout) == EOF) return END_WERROR; | |
e4bdf652 | 855 | (void) cutthrough_put_nl(); |
059ec3d9 PH |
856 | if (ch == '\r') |
857 | { | |
858 | ch_state = 2; | |
859 | continue; | |
860 | } | |
861 | ch_state = 1; | |
862 | break; | |
863 | } | |
864 | ||
865 | /* Add the character to the spool file, unless skipping; then loop for the | |
866 | next. */ | |
867 | ||
868 | message_size++; | |
1f5497b2 | 869 | linelength++; |
7e3ce68e | 870 | if (fout) |
059ec3d9 PH |
871 | { |
872 | if (fputc(ch, fout) == EOF) return END_WERROR; | |
873 | if (message_size > thismessage_size_limit) return END_SIZE; | |
874 | } | |
e4bdf652 JH |
875 | if(ch == '\n') |
876 | (void) cutthrough_put_nl(); | |
877 | else | |
878 | { | |
7e3ce68e | 879 | uschar c = ch; |
e4bdf652 JH |
880 | (void) cutthrough_puts(&c, 1); |
881 | } | |
059ec3d9 PH |
882 | } |
883 | ||
884 | /* Fall through here if EOF encountered. This indicates some kind of error, | |
885 | since a correct message is terminated by [CR] LF . [CR] LF. */ | |
886 | ||
887 | return END_EOF; | |
888 | } | |
889 | ||
890 | ||
891 | ||
892 | ||
7e3ce68e JH |
893 | /* Variant of the above read_message_data_smtp() specialised for RFC 3030 |
894 | CHUNKING. We assume that the incoming has proper CRLF, so only have to scan | |
895 | for and strip CR. On the downside there are more protocol reasons to stop. | |
896 | ||
897 | Arguments: | |
898 | fout a FILE to which to write the message; NULL if skipping | |
899 | ||
900 | Returns: One of the END_xxx values indicating why it stopped reading | |
901 | */ | |
902 | ||
903 | static int | |
904 | read_message_bdat_smtp(FILE *fout) | |
905 | { | |
906 | int ch; | |
907 | int linelength = 0; | |
908 | ||
909 | for (;;) switch (ch = bdat_getc()) | |
910 | { | |
911 | case EOF: return END_EOF; | |
912 | case EOD: return END_DOT; | |
913 | case ERR: return END_PROTOCOL; | |
914 | ||
915 | case '\r': | |
916 | body_linecount++; | |
917 | if (linelength > max_received_linelength) | |
918 | max_received_linelength = linelength; | |
919 | linelength = -1; | |
920 | break; | |
921 | ||
922 | case 0: | |
923 | body_zerocount++; | |
924 | /*FALLTHROUGH*/ | |
925 | default: | |
926 | message_size++; | |
927 | linelength++; | |
928 | if (fout) | |
929 | { | |
930 | if (fputc(ch, fout) == EOF) return END_WERROR; | |
931 | if (message_size > thismessage_size_limit) return END_SIZE; | |
932 | } | |
933 | #ifdef notyet | |
934 | if(ch == '\n') | |
935 | (void) cutthrough_put_nl(); | |
936 | else | |
937 | { | |
938 | uschar c = ch; | |
939 | (void) cutthrough_puts(&c, 1); | |
940 | } | |
941 | #endif | |
942 | break; | |
943 | } | |
944 | /*NOTREACHED*/ | |
945 | } | |
946 | ||
947 | ||
948 | ||
949 | ||
059ec3d9 PH |
950 | /************************************************* |
951 | * Swallow SMTP message * | |
952 | *************************************************/ | |
953 | ||
954 | /* This function is called when there has been some kind of error while reading | |
955 | an SMTP message, and the remaining data may need to be swallowed. It is global | |
956 | because it is called from smtp_closedown() to shut down an incoming call | |
957 | tidily. | |
958 | ||
959 | Argument: a FILE from which to read the message | |
960 | Returns: nothing | |
961 | */ | |
962 | ||
963 | void | |
964 | receive_swallow_smtp(void) | |
965 | { | |
7e3ce68e | 966 | /*XXX CHUNKING: not enough. read chunks until RSET? */ |
059ec3d9 PH |
967 | if (message_ended >= END_NOTENDED) |
968 | message_ended = read_message_data_smtp(NULL); | |
969 | } | |
970 | ||
971 | ||
972 | ||
973 | /************************************************* | |
974 | * Handle lost SMTP connection * | |
975 | *************************************************/ | |
976 | ||
977 | /* This function logs connection loss incidents and generates an appropriate | |
978 | SMTP response. | |
979 | ||
980 | Argument: additional data for the message | |
981 | Returns: the SMTP response | |
982 | */ | |
983 | ||
984 | static uschar * | |
985 | handle_lost_connection(uschar *s) | |
986 | { | |
987 | log_write(L_lost_incoming_connection | L_smtp_connection, LOG_MAIN, | |
988 | "%s lost while reading message data%s", smtp_get_connection_info(), s); | |
989 | return US"421 Lost incoming connection"; | |
990 | } | |
991 | ||
992 | ||
993 | ||
994 | ||
995 | /************************************************* | |
996 | * Handle a non-smtp reception error * | |
997 | *************************************************/ | |
998 | ||
999 | /* This function is called for various errors during the reception of non-SMTP | |
1000 | messages. It either sends a message to the sender of the problem message, or it | |
1001 | writes to the standard error stream. | |
1002 | ||
1003 | Arguments: | |
1004 | errcode code for moan_to_sender(), identifying the error | |
1005 | text1 first message text, passed to moan_to_sender() | |
1006 | text2 second message text, used only for stderrr | |
1007 | error_rc code to pass to exim_exit if no problem | |
1008 | f FILE containing body of message (may be stdin) | |
1009 | hptr pointer to instore headers or NULL | |
1010 | ||
1011 | Returns: calls exim_exit(), which does not return | |
1012 | */ | |
1013 | ||
1014 | static void | |
1015 | give_local_error(int errcode, uschar *text1, uschar *text2, int error_rc, | |
1016 | FILE *f, header_line *hptr) | |
1017 | { | |
1018 | if (error_handling == ERRORS_SENDER) | |
1019 | { | |
1020 | error_block eblock; | |
1021 | eblock.next = NULL; | |
1022 | eblock.text1 = text1; | |
37f3dc43 | 1023 | eblock.text2 = US""; |
059ec3d9 PH |
1024 | if (!moan_to_sender(errcode, &eblock, hptr, f, FALSE)) |
1025 | error_rc = EXIT_FAILURE; | |
1026 | } | |
37f3dc43 JH |
1027 | else |
1028 | fprintf(stderr, "exim: %s%s\n", text2, text1); /* Sic */ | |
f1e894f3 | 1029 | (void)fclose(f); |
059ec3d9 PH |
1030 | exim_exit(error_rc); |
1031 | } | |
1032 | ||
1033 | ||
1034 | ||
1035 | /************************************************* | |
1036 | * Add header lines set up by ACL * | |
1037 | *************************************************/ | |
1038 | ||
850635b6 PH |
1039 | /* This function is called to add the header lines that were set up by |
1040 | statements in an ACL to the list of headers in memory. It is done in two stages | |
1041 | like this, because when the ACL for RCPT is running, the other headers have not | |
1042 | yet been received. This function is called twice; once just before running the | |
1043 | DATA ACL, and once after. This is so that header lines added by MAIL or RCPT | |
1044 | are visible to the DATA ACL. | |
059ec3d9 PH |
1045 | |
1046 | Originally these header lines were added at the end. Now there is support for | |
1047 | three different places: top, bottom, and after the Received: header(s). There | |
1048 | will always be at least one Received: header, even if it is marked deleted, and | |
1049 | even if something else has been put in front of it. | |
1050 | ||
1051 | Arguments: | |
1052 | acl_name text to identify which ACL | |
1053 | ||
1054 | Returns: nothing | |
1055 | */ | |
1056 | ||
1057 | static void | |
578d43dc | 1058 | add_acl_headers(int where, uschar *acl_name) |
059ec3d9 PH |
1059 | { |
1060 | header_line *h, *next; | |
1061 | header_line *last_received = NULL; | |
e7568d51 | 1062 | |
578d43dc JH |
1063 | switch(where) |
1064 | { | |
1065 | case ACL_WHERE_DKIM: | |
1066 | case ACL_WHERE_MIME: | |
af4a1bca | 1067 | case ACL_WHERE_DATA: |
5032d1cf | 1068 | if (cutthrough.fd >= 0 && (acl_removed_headers || acl_added_headers)) |
578d43dc JH |
1069 | { |
1070 | log_write(0, LOG_MAIN|LOG_PANIC, "Header modification in data ACLs" | |
af4a1bca | 1071 | " will not take effect on cutthrough deliveries"); |
578d43dc JH |
1072 | return; |
1073 | } | |
1074 | } | |
1075 | ||
e7568d51 TL |
1076 | if (acl_removed_headers != NULL) |
1077 | { | |
1078 | DEBUG(D_receive|D_acl) debug_printf(">>Headers removed by %s ACL:\n", acl_name); | |
1079 | ||
4a142059 | 1080 | for (h = header_list; h != NULL; h = h->next) if (h->type != htype_old) |
e7568d51 | 1081 | { |
55414b25 | 1082 | const uschar * list = acl_removed_headers; |
e7568d51 TL |
1083 | int sep = ':'; /* This is specified as a colon-separated list */ |
1084 | uschar *s; | |
1085 | uschar buffer[128]; | |
4a142059 JH |
1086 | |
1087 | while ((s = string_nextinlist(&list, &sep, buffer, sizeof(buffer)))) | |
1088 | if (header_testname(h, s, Ustrlen(s), FALSE)) | |
e7568d51 TL |
1089 | { |
1090 | h->type = htype_old; | |
1091 | DEBUG(D_receive|D_acl) debug_printf(" %s", h->text); | |
1092 | } | |
e7568d51 TL |
1093 | } |
1094 | acl_removed_headers = NULL; | |
1095 | DEBUG(D_receive|D_acl) debug_printf(">>\n"); | |
1096 | } | |
059ec3d9 | 1097 | |
71fafd95 | 1098 | if (acl_added_headers == NULL) return; |
059ec3d9 PH |
1099 | DEBUG(D_receive|D_acl) debug_printf(">>Headers added by %s ACL:\n", acl_name); |
1100 | ||
71fafd95 | 1101 | for (h = acl_added_headers; h != NULL; h = next) |
059ec3d9 PH |
1102 | { |
1103 | next = h->next; | |
1104 | ||
1105 | switch(h->type) | |
1106 | { | |
1107 | case htype_add_top: | |
1108 | h->next = header_list; | |
1109 | header_list = h; | |
1110 | DEBUG(D_receive|D_acl) debug_printf(" (at top)"); | |
1111 | break; | |
1112 | ||
1113 | case htype_add_rec: | |
1114 | if (last_received == NULL) | |
1115 | { | |
1116 | last_received = header_list; | |
1117 | while (!header_testname(last_received, US"Received", 8, FALSE)) | |
1118 | last_received = last_received->next; | |
1119 | while (last_received->next != NULL && | |
1120 | header_testname(last_received->next, US"Received", 8, FALSE)) | |
1121 | last_received = last_received->next; | |
1122 | } | |
1123 | h->next = last_received->next; | |
1124 | last_received->next = h; | |
1125 | DEBUG(D_receive|D_acl) debug_printf(" (after Received:)"); | |
1126 | break; | |
1127 | ||
8523533c TK |
1128 | case htype_add_rfc: |
1129 | /* add header before any header which is NOT Received: or Resent- */ | |
1130 | last_received = header_list; | |
1131 | while ( (last_received->next != NULL) && | |
1132 | ( (header_testname(last_received->next, US"Received", 8, FALSE)) || | |
1133 | (header_testname_incomplete(last_received->next, US"Resent-", 7, FALSE)) ) ) | |
1134 | last_received = last_received->next; | |
1135 | /* last_received now points to the last Received: or Resent-* header | |
1136 | in an uninterrupted chain of those header types (seen from the beginning | |
1137 | of all headers. Our current header must follow it. */ | |
1138 | h->next = last_received->next; | |
1139 | last_received->next = h; | |
8e669ac1 | 1140 | DEBUG(D_receive|D_acl) debug_printf(" (before any non-Received: or Resent-*: header)"); |
8523533c TK |
1141 | break; |
1142 | ||
059ec3d9 PH |
1143 | default: |
1144 | h->next = NULL; | |
1145 | header_last->next = h; | |
1146 | break; | |
1147 | } | |
1148 | ||
1149 | if (h->next == NULL) header_last = h; | |
1150 | ||
1151 | /* Check for one of the known header types (From:, To:, etc.) though in | |
1152 | practice most added headers are going to be "other". Lower case | |
1153 | identification letters are never stored with the header; they are used | |
1154 | for existence tests when messages are received. So discard any lower case | |
1155 | flag values. */ | |
1156 | ||
1157 | h->type = header_checkname(h, FALSE); | |
1158 | if (h->type >= 'a') h->type = htype_other; | |
1159 | ||
1160 | DEBUG(D_receive|D_acl) debug_printf(" %s", header_last->text); | |
1161 | } | |
1162 | ||
71fafd95 | 1163 | acl_added_headers = NULL; |
059ec3d9 PH |
1164 | DEBUG(D_receive|D_acl) debug_printf(">>\n"); |
1165 | } | |
1166 | ||
1167 | ||
1168 | ||
1169 | /************************************************* | |
1170 | * Add host information for log line * | |
1171 | *************************************************/ | |
1172 | ||
1173 | /* Called for acceptance and rejecting log lines. This adds information about | |
1174 | the calling host to a string that is being built dynamically. | |
1175 | ||
1176 | Arguments: | |
1177 | s the dynamic string | |
1178 | sizeptr points to the size variable | |
1179 | ptrptr points to the pointer variable | |
1180 | ||
1181 | Returns: the extended string | |
1182 | */ | |
1183 | ||
1184 | static uschar * | |
fc16abb4 | 1185 | add_host_info_for_log(uschar * s, int * sizeptr, int * ptrptr) |
059ec3d9 | 1186 | { |
fc16abb4 | 1187 | if (sender_fullhost) |
059ec3d9 | 1188 | { |
fc16abb4 JH |
1189 | if (LOGGING(dnssec) && sender_host_dnssec) /*XXX sender_helo_dnssec? */ |
1190 | s = string_cat(s, sizeptr, ptrptr, US" DS"); | |
059ec3d9 | 1191 | s = string_append(s, sizeptr, ptrptr, 2, US" H=", sender_fullhost); |
6c6d6e48 | 1192 | if (LOGGING(incoming_interface) && interface_address != NULL) |
059ec3d9 | 1193 | { |
fc16abb4 JH |
1194 | s = string_cat(s, sizeptr, ptrptr, |
1195 | string_sprintf(" I=[%s]:%d", interface_address, interface_port)); | |
059ec3d9 PH |
1196 | } |
1197 | } | |
1198 | if (sender_ident != NULL) | |
1199 | s = string_append(s, sizeptr, ptrptr, 2, US" U=", sender_ident); | |
1200 | if (received_protocol != NULL) | |
1201 | s = string_append(s, sizeptr, ptrptr, 2, US" P=", received_protocol); | |
1202 | return s; | |
1203 | } | |
1204 | ||
1205 | ||
1206 | ||
63955bf2 | 1207 | #ifdef WITH_CONTENT_SCAN |
059ec3d9 | 1208 | |
54cdb463 PH |
1209 | /************************************************* |
1210 | * Run the MIME ACL on a message * | |
1211 | *************************************************/ | |
1212 | ||
1213 | /* This code is in a subroutine so that it can be used for both SMTP | |
1214 | and non-SMTP messages. It is called with a non-NULL ACL pointer. | |
1215 | ||
1216 | Arguments: | |
1217 | acl The ACL to run (acl_smtp_mime or acl_not_smtp_mime) | |
1218 | smtp_yield_ptr Set FALSE to kill messages after dropped connection | |
1219 | smtp_reply_ptr Where SMTP reply is being built | |
1220 | blackholed_by_ptr Where "blackholed by" message is being built | |
1221 | ||
1222 | Returns: TRUE to carry on; FALSE to abandon the message | |
1223 | */ | |
1224 | ||
1225 | static BOOL | |
1226 | run_mime_acl(uschar *acl, BOOL *smtp_yield_ptr, uschar **smtp_reply_ptr, | |
1227 | uschar **blackholed_by_ptr) | |
1228 | { | |
1229 | FILE *mbox_file; | |
1230 | uschar rfc822_file_path[2048]; | |
1231 | unsigned long mbox_size; | |
1232 | header_line *my_headerlist; | |
1233 | uschar *user_msg, *log_msg; | |
1234 | int mime_part_count_buffer = -1; | |
7156b1ef | 1235 | int rc = OK; |
54cdb463 PH |
1236 | |
1237 | memset(CS rfc822_file_path,0,2048); | |
1238 | ||
1239 | /* check if it is a MIME message */ | |
1240 | my_headerlist = header_list; | |
4e88a19f PH |
1241 | while (my_headerlist != NULL) |
1242 | { | |
54cdb463 | 1243 | /* skip deleted headers */ |
4e88a19f PH |
1244 | if (my_headerlist->type == '*') |
1245 | { | |
54cdb463 PH |
1246 | my_headerlist = my_headerlist->next; |
1247 | continue; | |
4e88a19f PH |
1248 | } |
1249 | if (strncmpic(my_headerlist->text, US"Content-Type:", 13) == 0) | |
1250 | { | |
54cdb463 PH |
1251 | DEBUG(D_receive) debug_printf("Found Content-Type: header - executing acl_smtp_mime.\n"); |
1252 | goto DO_MIME_ACL; | |
4e88a19f | 1253 | } |
54cdb463 | 1254 | my_headerlist = my_headerlist->next; |
4e88a19f | 1255 | } |
54cdb463 PH |
1256 | |
1257 | DEBUG(D_receive) debug_printf("No Content-Type: header - presumably not a MIME message.\n"); | |
1258 | return TRUE; | |
1259 | ||
1260 | DO_MIME_ACL: | |
1261 | /* make sure the eml mbox file is spooled up */ | |
8544e77a | 1262 | mbox_file = spool_mbox(&mbox_size, NULL); |
54cdb463 PH |
1263 | if (mbox_file == NULL) { |
1264 | /* error while spooling */ | |
1265 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1266 | "acl_smtp_mime: error while creating mbox spool file, message temporarily rejected."); | |
1267 | Uunlink(spool_name); | |
1268 | unspool_mbox(); | |
6f0c431a PP |
1269 | #ifdef EXPERIMENTAL_DCC |
1270 | dcc_ok = 0; | |
1271 | #endif | |
a5bd321b | 1272 | smtp_respond(US"451", 3, TRUE, US"temporary local problem"); |
54cdb463 PH |
1273 | message_id[0] = 0; /* Indicate no message accepted */ |
1274 | *smtp_reply_ptr = US""; /* Indicate reply already sent */ | |
1275 | return FALSE; /* Indicate skip to end of receive function */ | |
1276 | }; | |
1277 | ||
1278 | mime_is_rfc822 = 0; | |
1279 | ||
1280 | MIME_ACL_CHECK: | |
1281 | mime_part_count = -1; | |
1282 | rc = mime_acl_check(acl, mbox_file, NULL, &user_msg, &log_msg); | |
f1e894f3 | 1283 | (void)fclose(mbox_file); |
54cdb463 | 1284 | |
4e88a19f PH |
1285 | if (Ustrlen(rfc822_file_path) > 0) |
1286 | { | |
54cdb463 PH |
1287 | mime_part_count = mime_part_count_buffer; |
1288 | ||
4e88a19f PH |
1289 | if (unlink(CS rfc822_file_path) == -1) |
1290 | { | |
54cdb463 PH |
1291 | log_write(0, LOG_PANIC, |
1292 | "acl_smtp_mime: can't unlink RFC822 spool file, skipping."); | |
1293 | goto END_MIME_ACL; | |
4e88a19f PH |
1294 | } |
1295 | } | |
54cdb463 PH |
1296 | |
1297 | /* check if we must check any message/rfc822 attachments */ | |
4e88a19f PH |
1298 | if (rc == OK) |
1299 | { | |
54cdb463 | 1300 | uschar temp_path[1024]; |
e8bc7fca JH |
1301 | struct dirent * entry; |
1302 | DIR * tempdir; | |
54cdb463 | 1303 | |
e8bc7fca JH |
1304 | (void) string_format(temp_path, sizeof(temp_path), "%s/scan/%s", |
1305 | spool_directory, message_id); | |
54cdb463 | 1306 | |
4e88a19f | 1307 | tempdir = opendir(CS temp_path); |
e8bc7fca | 1308 | for (;;) |
4e88a19f | 1309 | { |
e8bc7fca JH |
1310 | if (!(entry = readdir(tempdir))) |
1311 | break; | |
1312 | if (strncmpic(US entry->d_name, US"__rfc822_", 9) == 0) | |
4e88a19f | 1313 | { |
e8bc7fca JH |
1314 | (void) string_format(rfc822_file_path, sizeof(rfc822_file_path), |
1315 | "%s/scan/%s/%s", spool_directory, message_id, entry->d_name); | |
1316 | debug_printf("RFC822 attachment detected: running MIME ACL for '%s'\n", | |
1317 | rfc822_file_path); | |
4e88a19f PH |
1318 | break; |
1319 | } | |
e8bc7fca | 1320 | } |
4e88a19f | 1321 | closedir(tempdir); |
54cdb463 | 1322 | |
e8bc7fca | 1323 | if (entry) |
4e88a19f | 1324 | { |
e8bc7fca | 1325 | if ((mbox_file = Ufopen(rfc822_file_path, "rb"))) |
4e88a19f | 1326 | { |
e8bc7fca JH |
1327 | /* set RFC822 expansion variable */ |
1328 | mime_is_rfc822 = 1; | |
1329 | mime_part_count_buffer = mime_part_count; | |
1330 | goto MIME_ACL_CHECK; | |
4e88a19f | 1331 | } |
e8bc7fca JH |
1332 | log_write(0, LOG_PANIC, |
1333 | "acl_smtp_mime: can't open RFC822 spool file, skipping."); | |
1334 | unlink(CS rfc822_file_path); | |
4e88a19f PH |
1335 | } |
1336 | } | |
54cdb463 PH |
1337 | |
1338 | END_MIME_ACL: | |
578d43dc | 1339 | add_acl_headers(ACL_WHERE_MIME, US"MIME"); |
54cdb463 PH |
1340 | if (rc == DISCARD) |
1341 | { | |
1342 | recipients_count = 0; | |
1343 | *blackholed_by_ptr = US"MIME ACL"; | |
1344 | } | |
1345 | else if (rc != OK) | |
1346 | { | |
1347 | Uunlink(spool_name); | |
1348 | unspool_mbox(); | |
6f0c431a PP |
1349 | #ifdef EXPERIMENTAL_DCC |
1350 | dcc_ok = 0; | |
1351 | #endif | |
4f6ae5c3 JH |
1352 | if ( smtp_input |
1353 | && smtp_handle_acl_fail(ACL_WHERE_MIME, rc, user_msg, log_msg) != 0) | |
1354 | { | |
85ffcba6 | 1355 | *smtp_yield_ptr = FALSE; /* No more messages after dropped connection */ |
f4c1088b | 1356 | *smtp_reply_ptr = US""; /* Indicate reply already sent */ |
4f6ae5c3 | 1357 | } |
54cdb463 PH |
1358 | message_id[0] = 0; /* Indicate no message accepted */ |
1359 | return FALSE; /* Cause skip to end of receive function */ | |
4e88a19f | 1360 | } |
54cdb463 PH |
1361 | |
1362 | return TRUE; | |
1363 | } | |
1364 | ||
63955bf2 | 1365 | #endif /* WITH_CONTENT_SCAN */ |
54cdb463 PH |
1366 | |
1367 | ||
e4bdf652 JH |
1368 | |
1369 | void | |
1370 | received_header_gen(void) | |
1371 | { | |
1372 | uschar *received; | |
1373 | uschar *timestamp; | |
1374 | header_line *received_header= header_list; | |
1375 | ||
1376 | timestamp = expand_string(US"${tod_full}"); | |
1377 | if (recipients_count == 1) received_for = recipients_list[0].address; | |
1378 | received = expand_string(received_header_text); | |
1379 | received_for = NULL; | |
1380 | ||
d4ff61d1 | 1381 | if (!received) |
e4bdf652 JH |
1382 | { |
1383 | if(spool_name[0] != 0) | |
1384 | Uunlink(spool_name); /* Lose the data file */ | |
1385 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Expansion of \"%s\" " | |
1386 | "(received_header_text) failed: %s", string_printing(received_header_text), | |
1387 | expand_string_message); | |
1388 | } | |
1389 | ||
1390 | /* The first element on the header chain is reserved for the Received header, | |
1391 | so all we have to do is fill in the text pointer, and set the type. However, if | |
1392 | the result of the expansion is an empty string, we leave the header marked as | |
1393 | "old" so as to refrain from adding a Received header. */ | |
1394 | ||
1395 | if (received[0] == 0) | |
1396 | { | |
1397 | received_header->text = string_sprintf("Received: ; %s\n", timestamp); | |
1398 | received_header->type = htype_old; | |
1399 | } | |
1400 | else | |
1401 | { | |
1402 | received_header->text = string_sprintf("%s; %s\n", received, timestamp); | |
1403 | received_header->type = htype_received; | |
1404 | } | |
1405 | ||
1406 | received_header->slen = Ustrlen(received_header->text); | |
1407 | ||
1408 | DEBUG(D_receive) debug_printf(">>Generated Received: header line\n%c %s", | |
1409 | received_header->type, received_header->text); | |
1410 | } | |
1411 | ||
1412 | ||
1413 | ||
059ec3d9 PH |
1414 | /************************************************* |
1415 | * Receive message * | |
1416 | *************************************************/ | |
1417 | ||
1418 | /* Receive a message on the given input, and put it into a pair of spool files. | |
1419 | Either a non-null list of recipients, or the extract flag will be true, or | |
1420 | both. The flag sender_local is true for locally generated messages. The flag | |
1421 | submission_mode is true if an ACL has obeyed "control = submission". The flag | |
8800895a | 1422 | suppress_local_fixups is true if an ACL has obeyed "control = |
f4ee74ac PP |
1423 | suppress_local_fixups" or -G was passed on the command-line. |
1424 | The flag smtp_input is true if the message is to be | |
8800895a PH |
1425 | handled using SMTP conventions about termination and lines starting with dots. |
1426 | For non-SMTP messages, dot_ends is true for dot-terminated messages. | |
059ec3d9 PH |
1427 | |
1428 | If a message was successfully read, message_id[0] will be non-zero. | |
1429 | ||
1430 | The general actions of this function are: | |
1431 | ||
1432 | . Read the headers of the message (if any) into a chain of store | |
1433 | blocks. | |
1434 | ||
1435 | . If there is a "sender:" header and the message is locally originated, | |
69358f02 PH |
1436 | throw it away, unless the caller is trusted, or unless |
1437 | active_local_sender_retain is set - which can only happen if | |
1438 | active_local_from_check is false. | |
059ec3d9 PH |
1439 | |
1440 | . If recipients are to be extracted from the message, build the | |
1441 | recipients list from the headers, removing any that were on the | |
1442 | original recipients list (unless extract_addresses_remove_arguments is | |
1443 | false), and at the same time, remove any bcc header that may be present. | |
1444 | ||
1445 | . Get the spool file for the data, sort out its unique name, open | |
1446 | and lock it (but don't give it the name yet). | |
1447 | ||
1448 | . Generate a "Message-Id" header if the message doesn't have one, for | |
1449 | locally-originated messages. | |
1450 | ||
1451 | . Generate a "Received" header. | |
1452 | ||
1453 | . Ensure the recipients list is fully qualified and rewritten if necessary. | |
1454 | ||
1455 | . If there are any rewriting rules, apply them to the sender address | |
1456 | and also to the headers. | |
1457 | ||
1458 | . If there is no from: header, generate one, for locally-generated messages | |
1459 | and messages in "submission mode" only. | |
1460 | ||
1461 | . If the sender is local, check that from: is correct, and if not, generate | |
1462 | a Sender: header, unless message comes from a trusted caller, or this | |
69358f02 | 1463 | feature is disabled by active_local_from_check being false. |
059ec3d9 PH |
1464 | |
1465 | . If there is no "date" header, generate one, for locally-originated | |
1466 | or submission mode messages only. | |
1467 | ||
1468 | . Copy the rest of the input, or up to a terminating "." if in SMTP or | |
1469 | dot_ends mode, to the data file. Leave it open, to hold the lock. | |
1470 | ||
1471 | . Write the envelope and the headers to a new file. | |
1472 | ||
1473 | . Set the name for the header file; close it. | |
1474 | ||
1475 | . Set the name for the data file; close it. | |
1476 | ||
1477 | Because this function can potentially be called many times in a single | |
1478 | SMTP connection, all store should be got by store_get(), so that it will be | |
1479 | automatically retrieved after the message is accepted. | |
1480 | ||
1481 | FUDGE: It seems that sites on the net send out messages with just LF | |
1482 | terminators, despite the warnings in the RFCs, and other MTAs handle this. So | |
1483 | we make the CRs optional in all cases. | |
1484 | ||
1485 | July 2003: Bare CRs in messages, especially in header lines, cause trouble. A | |
1486 | new regime is now in place in which bare CRs in header lines are turned into LF | |
1487 | followed by a space, so as not to terminate the header line. | |
1488 | ||
1489 | February 2004: A bare LF in a header line in a message whose first line was | |
1490 | terminated by CRLF is treated in the same way as a bare CR. | |
1491 | ||
1492 | Arguments: | |
1493 | extract_recip TRUE if recipients are to be extracted from the message's | |
1494 | headers | |
1495 | ||
1496 | Returns: TRUE there are more messages to be read (SMTP input) | |
1497 | FALSE there are no more messages to be read (non-SMTP input | |
1498 | or SMTP connection collapsed, or other failure) | |
1499 | ||
1500 | When reading a message for filter testing, the returned value indicates | |
1501 | whether the headers (which is all that is read) were terminated by '.' or | |
1502 | not. */ | |
1503 | ||
1504 | BOOL | |
1505 | receive_msg(BOOL extract_recip) | |
1506 | { | |
7156b1ef NM |
1507 | int i; |
1508 | int rc = FAIL; | |
059ec3d9 PH |
1509 | int msg_size = 0; |
1510 | int process_info_len = Ustrlen(process_info); | |
1511 | int error_rc = (error_handling == ERRORS_SENDER)? | |
1512 | errors_sender_rc : EXIT_FAILURE; | |
1513 | int header_size = 256; | |
1514 | int start, end, domain, size, sptr; | |
1515 | int id_resolution; | |
1516 | int had_zero = 0; | |
d677b2f2 | 1517 | int prevlines_length = 0; |
059ec3d9 PH |
1518 | |
1519 | register int ptr = 0; | |
1520 | ||
1521 | BOOL contains_resent_headers = FALSE; | |
1522 | BOOL extracted_ignored = FALSE; | |
1523 | BOOL first_line_ended_crlf = TRUE_UNSET; | |
1524 | BOOL smtp_yield = TRUE; | |
1525 | BOOL yield = FALSE; | |
1526 | ||
1527 | BOOL resents_exist = FALSE; | |
1528 | uschar *resent_prefix = US""; | |
1529 | uschar *blackholed_by = NULL; | |
04f7d5b9 | 1530 | uschar *blackhole_log_msg = US""; |
c5430c20 | 1531 | enum {NOT_TRIED, TMP_REJ, PERM_REJ, ACCEPTED} cutthrough_done = NOT_TRIED; |
059ec3d9 PH |
1532 | |
1533 | flock_t lock_data; | |
1534 | error_block *bad_addresses = NULL; | |
1535 | ||
1536 | uschar *frozen_by = NULL; | |
1537 | uschar *queued_by = NULL; | |
1538 | ||
1539 | uschar *errmsg, *s; | |
1540 | struct stat statbuf; | |
1541 | ||
4e88a19f | 1542 | /* Final message to give to SMTP caller, and messages from ACLs */ |
059ec3d9 PH |
1543 | |
1544 | uschar *smtp_reply = NULL; | |
4e88a19f | 1545 | uschar *user_msg, *log_msg; |
059ec3d9 PH |
1546 | |
1547 | /* Working header pointers */ | |
1548 | ||
1549 | header_line *h, *next; | |
1550 | ||
2cbb4081 | 1551 | /* Flags for noting the existence of certain headers (only one left) */ |
059ec3d9 PH |
1552 | |
1553 | BOOL date_header_exists = FALSE; | |
1554 | ||
1555 | /* Pointers to receive the addresses of headers whose contents we need. */ | |
1556 | ||
1557 | header_line *from_header = NULL; | |
1558 | header_line *subject_header = NULL; | |
1559 | header_line *msgid_header = NULL; | |
1560 | header_line *received_header; | |
1561 | ||
4840604e TL |
1562 | #ifdef EXPERIMENTAL_DMARC |
1563 | int dmarc_up = 0; | |
1564 | #endif /* EXPERIMENTAL_DMARC */ | |
1565 | ||
059ec3d9 PH |
1566 | /* Variables for use when building the Received: header. */ |
1567 | ||
059ec3d9 PH |
1568 | uschar *timestamp; |
1569 | int tslen; | |
1570 | ||
1571 | /* Release any open files that might have been cached while preparing to | |
1572 | accept the message - e.g. by verifying addresses - because reading a message | |
1573 | might take a fair bit of real time. */ | |
1574 | ||
1575 | search_tidyup(); | |
1576 | ||
e4bdf652 JH |
1577 | /* Extracting the recipient list from an input file is incompatible with |
1578 | cutthrough delivery with the no-spool option. It shouldn't be possible | |
817d9f57 | 1579 | to set up the combination, but just in case kill any ongoing connection. */ |
e4bdf652 | 1580 | if (extract_recip || !smtp_input) |
2e5b33cd | 1581 | cancel_cutthrough_connection("not smtp input"); |
e4bdf652 | 1582 | |
059ec3d9 PH |
1583 | /* Initialize the chain of headers by setting up a place-holder for Received: |
1584 | header. Temporarily mark it as "old", i.e. not to be used. We keep header_last | |
1585 | pointing to the end of the chain to make adding headers simple. */ | |
1586 | ||
1587 | received_header = header_list = header_last = store_get(sizeof(header_line)); | |
1588 | header_list->next = NULL; | |
1589 | header_list->type = htype_old; | |
1590 | header_list->text = NULL; | |
1591 | header_list->slen = 0; | |
1592 | ||
1593 | /* Control block for the next header to be read. */ | |
1594 | ||
1595 | next = store_get(sizeof(header_line)); | |
1596 | next->text = store_get(header_size); | |
1597 | ||
1598 | /* Initialize message id to be null (indicating no message read), and the | |
1599 | header names list to be the normal list. Indicate there is no data file open | |
1600 | yet, initialize the size and warning count, and deal with no size limit. */ | |
1601 | ||
1602 | message_id[0] = 0; | |
1603 | data_file = NULL; | |
1604 | data_fd = -1; | |
41313d92 | 1605 | spool_name = US""; |
059ec3d9 PH |
1606 | message_size = 0; |
1607 | warning_count = 0; | |
d677b2f2 | 1608 | received_count = 1; /* For the one we will add */ |
059ec3d9 PH |
1609 | |
1610 | if (thismessage_size_limit <= 0) thismessage_size_limit = INT_MAX; | |
1611 | ||
2e0c1448 | 1612 | /* While reading the message, the following counts are computed. */ |
059ec3d9 | 1613 | |
d677b2f2 PH |
1614 | message_linecount = body_linecount = body_zerocount = |
1615 | max_received_linelength = 0; | |
059ec3d9 | 1616 | |
80a47a2c | 1617 | #ifndef DISABLE_DKIM |
e983e85a JH |
1618 | /* Call into DKIM to set up the context. In CHUNKING mode |
1619 | we clear the dot-stuffing flag */ | |
1620 | if (smtp_input && !smtp_batched_input && !dkim_disable_verify) | |
1621 | dkim_exim_verify_init(chunking_state <= CHUNKING_OFFERED); | |
fb2274d4 TK |
1622 | #endif |
1623 | ||
4840604e TL |
1624 | #ifdef EXPERIMENTAL_DMARC |
1625 | /* initialize libopendmarc */ | |
1626 | dmarc_up = dmarc_init(); | |
1627 | #endif | |
1628 | ||
059ec3d9 PH |
1629 | /* Remember the time of reception. Exim uses time+pid for uniqueness of message |
1630 | ids, and fractions of a second are required. See the comments that precede the | |
1631 | message id creation below. */ | |
1632 | ||
1633 | (void)gettimeofday(&message_id_tv, NULL); | |
1634 | ||
1635 | /* For other uses of the received time we can operate with granularity of one | |
1636 | second, and for that we use the global variable received_time. This is for | |
1637 | things like ultimate message timeouts. */ | |
1638 | ||
1639 | received_time = message_id_tv.tv_sec; | |
1640 | ||
1641 | /* If SMTP input, set the special handler for timeouts. The alarm() calls | |
1642 | happen in the smtp_getc() function when it refills its buffer. */ | |
1643 | ||
1644 | if (smtp_input) os_non_restarting_signal(SIGALRM, data_timeout_handler); | |
1645 | ||
1646 | /* If not SMTP input, timeout happens only if configured, and we just set a | |
1647 | single timeout for the whole message. */ | |
1648 | ||
1649 | else if (receive_timeout > 0) | |
1650 | { | |
1651 | os_non_restarting_signal(SIGALRM, data_timeout_handler); | |
1652 | alarm(receive_timeout); | |
1653 | } | |
1654 | ||
1655 | /* SIGTERM and SIGINT are caught always. */ | |
1656 | ||
1657 | signal(SIGTERM, data_sigterm_sigint_handler); | |
1658 | signal(SIGINT, data_sigterm_sigint_handler); | |
1659 | ||
1660 | /* Header lines in messages are not supposed to be very long, though when | |
1661 | unfolded, to: and cc: headers can take up a lot of store. We must also cope | |
1662 | with the possibility of junk being thrown at us. Start by getting 256 bytes for | |
1663 | storing the header, and extend this as necessary using string_cat(). | |
1664 | ||
1665 | To cope with total lunacies, impose an upper limit on the length of the header | |
1666 | section of the message, as otherwise the store will fill up. We must also cope | |
1667 | with the possibility of binary zeros in the data. Hence we cannot use fgets(). | |
1668 | Folded header lines are joined into one string, leaving the '\n' characters | |
1669 | inside them, so that writing them out reproduces the input. | |
1670 | ||
1671 | Loop for each character of each header; the next structure for chaining the | |
1672 | header is set up already, with ptr the offset of the next character in | |
1673 | next->text. */ | |
1674 | ||
1675 | for (;;) | |
1676 | { | |
80a47a2c | 1677 | int ch = (receive_getc)(); |
059ec3d9 PH |
1678 | |
1679 | /* If we hit EOF on a SMTP connection, it's an error, since incoming | |
1680 | SMTP must have a correct "." terminator. */ | |
1681 | ||
1682 | if (ch == EOF && smtp_input /* && !smtp_batched_input */) | |
1683 | { | |
1684 | smtp_reply = handle_lost_connection(US" (header)"); | |
1685 | smtp_yield = FALSE; | |
1686 | goto TIDYUP; /* Skip to end of function */ | |
1687 | } | |
1688 | ||
1689 | /* See if we are at the current header's size limit - there must be at least | |
1690 | four bytes left. This allows for the new character plus a zero, plus two for | |
1691 | extra insertions when we are playing games with dots and carriage returns. If | |
1692 | we are at the limit, extend the text buffer. This could have been done | |
1693 | automatically using string_cat() but because this is a tightish loop storing | |
1694 | only one character at a time, we choose to do it inline. Normally | |
1695 | store_extend() will be able to extend the block; only at the end of a big | |
1696 | store block will a copy be needed. To handle the case of very long headers | |
1697 | (and sometimes lunatic messages can have ones that are 100s of K long) we | |
1698 | call store_release() for strings that have been copied - if the string is at | |
1699 | the start of a block (and therefore the only thing in it, because we aren't | |
1700 | doing any other gets), the block gets freed. We can only do this because we | |
1701 | know there are no other calls to store_get() going on. */ | |
1702 | ||
1703 | if (ptr >= header_size - 4) | |
1704 | { | |
1705 | int oldsize = header_size; | |
1706 | /* header_size += 256; */ | |
1707 | header_size *= 2; | |
1708 | if (!store_extend(next->text, oldsize, header_size)) | |
1709 | { | |
1710 | uschar *newtext = store_get(header_size); | |
1711 | memcpy(newtext, next->text, ptr); | |
1712 | store_release(next->text); | |
1713 | next->text = newtext; | |
1714 | } | |
1715 | } | |
1716 | ||
1717 | /* Cope with receiving a binary zero. There is dispute about whether | |
1718 | these should be allowed in RFC 822 messages. The middle view is that they | |
1719 | should not be allowed in headers, at least. Exim takes this attitude at | |
1720 | the moment. We can't just stomp on them here, because we don't know that | |
1721 | this line is a header yet. Set a flag to cause scanning later. */ | |
1722 | ||
1723 | if (ch == 0) had_zero++; | |
1724 | ||
1725 | /* Test for termination. Lines in remote SMTP are terminated by CRLF, while | |
1726 | those from data files use just LF. Treat LF in local SMTP input as a | |
1727 | terminator too. Treat EOF as a line terminator always. */ | |
1728 | ||
1729 | if (ch == EOF) goto EOL; | |
1730 | ||
1731 | /* FUDGE: There are sites out there that don't send CRs before their LFs, and | |
1732 | other MTAs accept this. We are therefore forced into this "liberalisation" | |
1733 | too, so we accept LF as a line terminator whatever the source of the message. | |
1734 | However, if the first line of the message ended with a CRLF, we treat a bare | |
1735 | LF specially by inserting a white space after it to ensure that the header | |
1736 | line is not terminated. */ | |
1737 | ||
1738 | if (ch == '\n') | |
1739 | { | |
1740 | if (first_line_ended_crlf == TRUE_UNSET) first_line_ended_crlf = FALSE; | |
80a47a2c | 1741 | else if (first_line_ended_crlf) receive_ungetc(' '); |
059ec3d9 PH |
1742 | goto EOL; |
1743 | } | |
1744 | ||
1745 | /* This is not the end of the line. If this is SMTP input and this is | |
1746 | the first character in the line and it is a "." character, ignore it. | |
1747 | This implements the dot-doubling rule, though header lines starting with | |
1748 | dots aren't exactly common. They are legal in RFC 822, though. If the | |
1749 | following is CRLF or LF, this is the line that that terminates the | |
1750 | entire message. We set message_ended to indicate this has happened (to | |
1751 | prevent further reading), and break out of the loop, having freed the | |
1752 | empty header, and set next = NULL to indicate no data line. */ | |
1753 | ||
1754 | if (ptr == 0 && ch == '.' && (smtp_input || dot_ends)) | |
1755 | { | |
80a47a2c | 1756 | ch = (receive_getc)(); |
059ec3d9 PH |
1757 | if (ch == '\r') |
1758 | { | |
80a47a2c | 1759 | ch = (receive_getc)(); |
059ec3d9 PH |
1760 | if (ch != '\n') |
1761 | { | |
80a47a2c | 1762 | receive_ungetc(ch); |
059ec3d9 PH |
1763 | ch = '\r'; /* Revert to CR */ |
1764 | } | |
1765 | } | |
1766 | if (ch == '\n') | |
1767 | { | |
1768 | message_ended = END_DOT; | |
1769 | store_reset(next); | |
1770 | next = NULL; | |
1771 | break; /* End character-reading loop */ | |
1772 | } | |
1773 | ||
1774 | /* For non-SMTP input, the dot at the start of the line was really a data | |
1775 | character. What is now in ch is the following character. We guaranteed | |
1776 | enough space for this above. */ | |
1777 | ||
1778 | if (!smtp_input) | |
1779 | { | |
1780 | next->text[ptr++] = '.'; | |
1781 | message_size++; | |
1782 | } | |
1783 | } | |
1784 | ||
1785 | /* If CR is immediately followed by LF, end the line, ignoring the CR, and | |
1786 | remember this case if this is the first line ending. */ | |
1787 | ||
1788 | if (ch == '\r') | |
1789 | { | |
80a47a2c | 1790 | ch = (receive_getc)(); |
059ec3d9 PH |
1791 | if (ch == '\n') |
1792 | { | |
1793 | if (first_line_ended_crlf == TRUE_UNSET) first_line_ended_crlf = TRUE; | |
1794 | goto EOL; | |
1795 | } | |
1796 | ||
1797 | /* Otherwise, put back the character after CR, and turn the bare CR | |
1798 | into LF SP. */ | |
1799 | ||
80a47a2c | 1800 | ch = (receive_ungetc)(ch); |
059ec3d9 PH |
1801 | next->text[ptr++] = '\n'; |
1802 | message_size++; | |
1803 | ch = ' '; | |
1804 | } | |
1805 | ||
1806 | /* We have a data character for the header line. */ | |
1807 | ||
1808 | next->text[ptr++] = ch; /* Add to buffer */ | |
1809 | message_size++; /* Total message size so far */ | |
1810 | ||
1811 | /* Handle failure due to a humungously long header section. The >= allows | |
1812 | for the terminating \n. Add what we have so far onto the headers list so | |
1813 | that it gets reflected in any error message, and back up the just-read | |
1814 | character. */ | |
1815 | ||
1816 | if (message_size >= header_maxsize) | |
1817 | { | |
1818 | next->text[ptr] = 0; | |
1819 | next->slen = ptr; | |
1820 | next->type = htype_other; | |
1821 | next->next = NULL; | |
1822 | header_last->next = next; | |
1823 | header_last = next; | |
1824 | ||
1825 | log_write(0, LOG_MAIN, "ridiculously long message header received from " | |
1826 | "%s (more than %d characters): message abandoned", | |
1827 | sender_host_unknown? sender_ident : sender_fullhost, header_maxsize); | |
1828 | ||
1829 | if (smtp_input) | |
1830 | { | |
1831 | smtp_reply = US"552 Message header is ridiculously long"; | |
1832 | receive_swallow_smtp(); | |
1833 | goto TIDYUP; /* Skip to end of function */ | |
1834 | } | |
1835 | ||
1836 | else | |
1837 | { | |
1838 | give_local_error(ERRMESS_VLONGHEADER, | |
1839 | string_sprintf("message header longer than %d characters received: " | |
1840 | "message not accepted", header_maxsize), US"", error_rc, stdin, | |
1841 | header_list->next); | |
1842 | /* Does not return */ | |
1843 | } | |
1844 | } | |
1845 | ||
1846 | continue; /* With next input character */ | |
1847 | ||
1848 | /* End of header line reached */ | |
1849 | ||
1850 | EOL: | |
2e0c1448 PH |
1851 | |
1852 | /* Keep track of lines for BSMTP errors and overall message_linecount. */ | |
1853 | ||
1854 | receive_linecount++; | |
1855 | message_linecount++; | |
059ec3d9 | 1856 | |
d677b2f2 PH |
1857 | /* Keep track of maximum line length */ |
1858 | ||
1859 | if (ptr - prevlines_length > max_received_linelength) | |
1860 | max_received_linelength = ptr - prevlines_length; | |
1861 | prevlines_length = ptr + 1; | |
1862 | ||
059ec3d9 PH |
1863 | /* Now put in the terminating newline. There is always space for |
1864 | at least two more characters. */ | |
1865 | ||
1866 | next->text[ptr++] = '\n'; | |
1867 | message_size++; | |
1868 | ||
1869 | /* A blank line signals the end of the headers; release the unwanted | |
1870 | space and set next to NULL to indicate this. */ | |
1871 | ||
1872 | if (ptr == 1) | |
1873 | { | |
1874 | store_reset(next); | |
1875 | next = NULL; | |
1876 | break; | |
1877 | } | |
1878 | ||
1879 | /* There is data in the line; see if the next input character is a | |
1880 | whitespace character. If it is, we have a continuation of this header line. | |
1881 | There is always space for at least one character at this point. */ | |
1882 | ||
1883 | if (ch != EOF) | |
1884 | { | |
80a47a2c | 1885 | int nextch = (receive_getc)(); |
059ec3d9 PH |
1886 | if (nextch == ' ' || nextch == '\t') |
1887 | { | |
1888 | next->text[ptr++] = nextch; | |
1889 | message_size++; | |
1890 | continue; /* Iterate the loop */ | |
1891 | } | |
80a47a2c | 1892 | else if (nextch != EOF) (receive_ungetc)(nextch); /* For next time */ |
059ec3d9 PH |
1893 | else ch = EOF; /* Cause main loop to exit at end */ |
1894 | } | |
1895 | ||
1896 | /* We have got to the real line end. Terminate the string and release store | |
1897 | beyond it. If it turns out to be a real header, internal binary zeros will | |
1898 | be squashed later. */ | |
1899 | ||
1900 | next->text[ptr] = 0; | |
1901 | next->slen = ptr; | |
1902 | store_reset(next->text + ptr + 1); | |
1903 | ||
1904 | /* Check the running total size against the overall message size limit. We | |
1905 | don't expect to fail here, but if the overall limit is set less than MESSAGE_ | |
1906 | MAXSIZE and a big header is sent, we want to catch it. Just stop reading | |
1907 | headers - the code to read the body will then also hit the buffer. */ | |
1908 | ||
1909 | if (message_size > thismessage_size_limit) break; | |
1910 | ||
1911 | /* A line that is not syntactically correct for a header also marks | |
1912 | the end of the headers. In this case, we leave next containing the | |
1913 | first data line. This might actually be several lines because of the | |
1914 | continuation logic applied above, but that doesn't matter. | |
1915 | ||
1916 | It turns out that smail, and presumably sendmail, accept leading lines | |
1917 | of the form | |
1918 | ||
1919 | From ph10 Fri Jan 5 12:35 GMT 1996 | |
1920 | ||
1921 | in messages. The "mail" command on Solaris 2 sends such lines. I cannot | |
1922 | find any documentation of this, but for compatibility it had better be | |
1923 | accepted. Exim restricts it to the case of non-smtp messages, and | |
1924 | treats it as an alternative to the -f command line option. Thus it is | |
1925 | ignored except for trusted users or filter testing. Otherwise it is taken | |
1926 | as the sender address, unless -f was used (sendmail compatibility). | |
1927 | ||
1928 | It further turns out that some UUCPs generate the From_line in a different | |
1929 | format, e.g. | |
1930 | ||
1931 | From ph10 Fri, 7 Jan 97 14:00:00 GMT | |
1932 | ||
1933 | The regex for matching these things is now capable of recognizing both | |
1934 | formats (including 2- and 4-digit years in the latter). In fact, the regex | |
1935 | is now configurable, as is the expansion string to fish out the sender. | |
1936 | ||
1937 | Even further on it has been discovered that some broken clients send | |
1938 | these lines in SMTP messages. There is now an option to ignore them from | |
1939 | specified hosts or networks. Sigh. */ | |
1940 | ||
1941 | if (header_last == header_list && | |
1942 | (!smtp_input | |
1943 | || | |
1944 | (sender_host_address != NULL && | |
1945 | verify_check_host(&ignore_fromline_hosts) == OK) | |
1946 | || | |
1947 | (sender_host_address == NULL && ignore_fromline_local) | |
1948 | ) && | |
1949 | regex_match_and_setup(regex_From, next->text, 0, -1)) | |
1950 | { | |
1951 | if (!sender_address_forced) | |
1952 | { | |
1953 | uschar *uucp_sender = expand_string(uucp_from_sender); | |
1954 | if (uucp_sender == NULL) | |
1955 | { | |
1956 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1957 | "expansion of \"%s\" failed after matching " | |
1958 | "\"From \" line: %s", uucp_from_sender, expand_string_message); | |
1959 | } | |
1960 | else | |
1961 | { | |
1962 | int start, end, domain; | |
1963 | uschar *errmess; | |
1964 | uschar *newsender = parse_extract_address(uucp_sender, &errmess, | |
1965 | &start, &end, &domain, TRUE); | |
1966 | if (newsender != NULL) | |
1967 | { | |
1968 | if (domain == 0 && newsender[0] != 0) | |
1969 | newsender = rewrite_address_qualify(newsender, FALSE); | |
1970 | ||
f05da2e8 | 1971 | if (filter_test != FTEST_NONE || receive_check_set_sender(newsender)) |
059ec3d9 PH |
1972 | { |
1973 | sender_address = newsender; | |
1974 | ||
f05da2e8 | 1975 | if (trusted_caller || filter_test != FTEST_NONE) |
059ec3d9 PH |
1976 | { |
1977 | authenticated_sender = NULL; | |
1978 | originator_name = US""; | |
1979 | sender_local = FALSE; | |
1980 | } | |
1981 | ||
f05da2e8 | 1982 | if (filter_test != FTEST_NONE) |
059ec3d9 PH |
1983 | printf("Sender taken from \"From \" line\n"); |
1984 | } | |
1985 | } | |
1986 | } | |
1987 | } | |
1988 | } | |
1989 | ||
1990 | /* Not a leading "From " line. Check to see if it is a valid header line. | |
1991 | Header names may contain any non-control characters except space and colon, | |
1992 | amazingly. */ | |
1993 | ||
1994 | else | |
1995 | { | |
1996 | uschar *p = next->text; | |
1997 | ||
1998 | /* If not a valid header line, break from the header reading loop, leaving | |
1999 | next != NULL, indicating that it holds the first line of the body. */ | |
2000 | ||
2001 | if (isspace(*p)) break; | |
2002 | while (mac_isgraph(*p) && *p != ':') p++; | |
2003 | while (isspace(*p)) p++; | |
2004 | if (*p != ':') | |
2005 | { | |
2006 | body_zerocount = had_zero; | |
2007 | break; | |
2008 | } | |
2009 | ||
2010 | /* We have a valid header line. If there were any binary zeroes in | |
2011 | the line, stomp on them here. */ | |
2012 | ||
2013 | if (had_zero > 0) | |
2014 | for (p = next->text; p < next->text + ptr; p++) if (*p == 0) *p = '?'; | |
2015 | ||
2016 | /* It is perfectly legal to have an empty continuation line | |
2017 | at the end of a header, but it is confusing to humans | |
2018 | looking at such messages, since it looks like a blank line. | |
2019 | Reduce confusion by removing redundant white space at the | |
2020 | end. We know that there is at least one printing character | |
2021 | (the ':' tested for above) so there is no danger of running | |
2022 | off the end. */ | |
2023 | ||
2024 | p = next->text + ptr - 2; | |
2025 | for (;;) | |
2026 | { | |
2027 | while (*p == ' ' || *p == '\t') p--; | |
2028 | if (*p != '\n') break; | |
2029 | ptr = (p--) - next->text + 1; | |
2030 | message_size -= next->slen - ptr; | |
2031 | next->text[ptr] = 0; | |
2032 | next->slen = ptr; | |
2033 | } | |
2034 | ||
2035 | /* Add the header to the chain */ | |
2036 | ||
2037 | next->type = htype_other; | |
2038 | next->next = NULL; | |
2039 | header_last->next = next; | |
2040 | header_last = next; | |
2041 | ||
2042 | /* Check the limit for individual line lengths. This comes after adding to | |
2043 | the chain so that the failing line is reflected if a bounce is generated | |
2044 | (for a local message). */ | |
2045 | ||
2046 | if (header_line_maxsize > 0 && next->slen > header_line_maxsize) | |
2047 | { | |
2048 | log_write(0, LOG_MAIN, "overlong message header line received from " | |
2049 | "%s (more than %d characters): message abandoned", | |
2050 | sender_host_unknown? sender_ident : sender_fullhost, | |
2051 | header_line_maxsize); | |
2052 | ||
2053 | if (smtp_input) | |
2054 | { | |
2055 | smtp_reply = US"552 A message header line is too long"; | |
2056 | receive_swallow_smtp(); | |
2057 | goto TIDYUP; /* Skip to end of function */ | |
2058 | } | |
2059 | ||
2060 | else | |
2061 | { | |
2062 | give_local_error(ERRMESS_VLONGHDRLINE, | |
2063 | string_sprintf("message header line longer than %d characters " | |
2064 | "received: message not accepted", header_line_maxsize), US"", | |
2065 | error_rc, stdin, header_list->next); | |
2066 | /* Does not return */ | |
2067 | } | |
2068 | } | |
2069 | ||
2070 | /* Note if any resent- fields exist. */ | |
2071 | ||
2072 | if (!resents_exist && strncmpic(next->text, US"resent-", 7) == 0) | |
2073 | { | |
2074 | resents_exist = TRUE; | |
2075 | resent_prefix = US"Resent-"; | |
2076 | } | |
2077 | } | |
2078 | ||
2079 | /* The line has been handled. If we have hit EOF, break out of the loop, | |
2080 | indicating no pending data line. */ | |
2081 | ||
2082 | if (ch == EOF) { next = NULL; break; } | |
2083 | ||
2084 | /* Set up for the next header */ | |
2085 | ||
2086 | header_size = 256; | |
2087 | next = store_get(sizeof(header_line)); | |
2088 | next->text = store_get(header_size); | |
2089 | ptr = 0; | |
2090 | had_zero = 0; | |
d677b2f2 | 2091 | prevlines_length = 0; |
059ec3d9 PH |
2092 | } /* Continue, starting to read the next header */ |
2093 | ||
2094 | /* At this point, we have read all the headers into a data structure in main | |
2095 | store. The first header is still the dummy placeholder for the Received: header | |
2096 | we are going to generate a bit later on. If next != NULL, it contains the first | |
2097 | data line - which terminated the headers before reaching a blank line (not the | |
2098 | normal case). */ | |
2099 | ||
2100 | DEBUG(D_receive) | |
2101 | { | |
2102 | debug_printf(">>Headers received:\n"); | |
2103 | for (h = header_list->next; h != NULL; h = h->next) | |
2104 | debug_printf("%s", h->text); | |
2105 | debug_printf("\n"); | |
2106 | } | |
2107 | ||
2108 | /* End of file on any SMTP connection is an error. If an incoming SMTP call | |
2109 | is dropped immediately after valid headers, the next thing we will see is EOF. | |
2110 | We must test for this specially, as further down the reading of the data is | |
2111 | skipped if already at EOF. */ | |
2112 | ||
2113 | if (smtp_input && (receive_feof)()) | |
2114 | { | |
2115 | smtp_reply = handle_lost_connection(US" (after header)"); | |
2116 | smtp_yield = FALSE; | |
2117 | goto TIDYUP; /* Skip to end of function */ | |
2118 | } | |
2119 | ||
2120 | /* If this is a filter test run and no headers were read, output a warning | |
2121 | in case there is a mistake in the test message. */ | |
2122 | ||
f05da2e8 | 2123 | if (filter_test != FTEST_NONE && header_list->next == NULL) |
059ec3d9 PH |
2124 | printf("Warning: no message headers read\n"); |
2125 | ||
2126 | ||
2127 | /* Scan the headers to identify them. Some are merely marked for later | |
2128 | processing; some are dealt with here. */ | |
2129 | ||
2130 | for (h = header_list->next; h != NULL; h = h->next) | |
2131 | { | |
2132 | BOOL is_resent = strncmpic(h->text, US"resent-", 7) == 0; | |
2133 | if (is_resent) contains_resent_headers = TRUE; | |
2134 | ||
2135 | switch (header_checkname(h, is_resent)) | |
2136 | { | |
059ec3d9 | 2137 | case htype_bcc: |
2cbb4081 | 2138 | h->type = htype_bcc; /* Both Bcc: and Resent-Bcc: */ |
059ec3d9 PH |
2139 | break; |
2140 | ||
059ec3d9 | 2141 | case htype_cc: |
2cbb4081 | 2142 | h->type = htype_cc; /* Both Cc: and Resent-Cc: */ |
059ec3d9 PH |
2143 | break; |
2144 | ||
2145 | /* Record whether a Date: or Resent-Date: header exists, as appropriate. */ | |
2146 | ||
2147 | case htype_date: | |
4c69d561 | 2148 | if (!resents_exist || is_resent) date_header_exists = TRUE; |
059ec3d9 PH |
2149 | break; |
2150 | ||
2151 | /* Same comments as about Return-Path: below. */ | |
2152 | ||
2153 | case htype_delivery_date: | |
2154 | if (delivery_date_remove) h->type = htype_old; | |
2155 | break; | |
2156 | ||
2157 | /* Same comments as about Return-Path: below. */ | |
2158 | ||
2159 | case htype_envelope_to: | |
2160 | if (envelope_to_remove) h->type = htype_old; | |
2161 | break; | |
2162 | ||
2163 | /* Mark all "From:" headers so they get rewritten. Save the one that is to | |
2164 | be used for Sender: checking. For Sendmail compatibility, if the "From:" | |
2165 | header consists of just the login id of the user who called Exim, rewrite | |
2166 | it with the gecos field first. Apply this rule to Resent-From: if there | |
2167 | are resent- fields. */ | |
2168 | ||
2169 | case htype_from: | |
2170 | h->type = htype_from; | |
2171 | if (!resents_exist || is_resent) | |
2172 | { | |
2173 | from_header = h; | |
2174 | if (!smtp_input) | |
2175 | { | |
5de8faa3 | 2176 | int len; |
059ec3d9 PH |
2177 | uschar *s = Ustrchr(h->text, ':') + 1; |
2178 | while (isspace(*s)) s++; | |
5de8faa3 | 2179 | len = h->slen - (s - h->text) - 1; |
e0fccd1d TF |
2180 | if (Ustrlen(originator_login) == len && |
2181 | strncmpic(s, originator_login, len) == 0) | |
059ec3d9 PH |
2182 | { |
2183 | uschar *name = is_resent? US"Resent-From" : US"From"; | |
2184 | header_add(htype_from, "%s: %s <%s@%s>\n", name, originator_name, | |
2185 | originator_login, qualify_domain_sender); | |
2186 | from_header = header_last; | |
2187 | h->type = htype_old; | |
2188 | DEBUG(D_receive|D_rewrite) | |
2189 | debug_printf("rewrote \"%s:\" header using gecos\n", name); | |
2190 | } | |
2191 | } | |
2192 | } | |
2193 | break; | |
2194 | ||
2195 | /* Identify the Message-id: header for generating "in-reply-to" in the | |
2196 | autoreply transport. For incoming logging, save any resent- value. In both | |
2197 | cases, take just the first of any multiples. */ | |
2198 | ||
2199 | case htype_id: | |
2200 | if (msgid_header == NULL && (!resents_exist || is_resent)) | |
2201 | { | |
2202 | msgid_header = h; | |
2203 | h->type = htype_id; | |
2204 | } | |
2205 | break; | |
2206 | ||
2207 | /* Flag all Received: headers */ | |
2208 | ||
2209 | case htype_received: | |
2210 | h->type = htype_received; | |
2211 | received_count++; | |
2212 | break; | |
2213 | ||
2214 | /* "Reply-to:" is just noted (there is no resent-reply-to field) */ | |
2215 | ||
2216 | case htype_reply_to: | |
2217 | h->type = htype_reply_to; | |
2218 | break; | |
2219 | ||
2220 | /* The Return-path: header is supposed to be added to messages when | |
2221 | they leave the SMTP system. We shouldn't receive messages that already | |
2222 | contain Return-path. However, since Exim generates Return-path: on | |
2223 | local delivery, resent messages may well contain it. We therefore | |
2224 | provide an option (which defaults on) to remove any Return-path: headers | |
2225 | on input. Removal actually means flagging as "old", which prevents the | |
2226 | header being transmitted with the message. */ | |
2227 | ||
2228 | case htype_return_path: | |
2229 | if (return_path_remove) h->type = htype_old; | |
2230 | ||
2231 | /* If we are testing a mail filter file, use the value of the | |
2232 | Return-Path: header to set up the return_path variable, which is not | |
2233 | otherwise set. However, remove any <> that surround the address | |
2234 | because the variable doesn't have these. */ | |
2235 | ||
f05da2e8 | 2236 | if (filter_test != FTEST_NONE) |
059ec3d9 PH |
2237 | { |
2238 | uschar *start = h->text + 12; | |
2239 | uschar *end = start + Ustrlen(start); | |
2240 | while (isspace(*start)) start++; | |
2241 | while (end > start && isspace(end[-1])) end--; | |
2242 | if (*start == '<' && end[-1] == '>') | |
2243 | { | |
2244 | start++; | |
2245 | end--; | |
2246 | } | |
2247 | return_path = string_copyn(start, end - start); | |
2248 | printf("Return-path taken from \"Return-path:\" header line\n"); | |
2249 | } | |
2250 | break; | |
2251 | ||
2252 | /* If there is a "Sender:" header and the message is locally originated, | |
8800895a PH |
2253 | and from an untrusted caller and suppress_local_fixups is not set, or if we |
2254 | are in submission mode for a remote message, mark it "old" so that it will | |
2255 | not be transmitted with the message, unless active_local_sender_retain is | |
2256 | set. (This can only be true if active_local_from_check is false.) If there | |
2257 | are any resent- headers in the message, apply this rule to Resent-Sender: | |
2258 | instead of Sender:. Messages with multiple resent- header sets cannot be | |
2259 | tidily handled. (For this reason, at least one MUA - Pine - turns old | |
2260 | resent- headers into X-resent- headers when resending, leaving just one | |
2261 | set.) */ | |
059ec3d9 PH |
2262 | |
2263 | case htype_sender: | |
69358f02 | 2264 | h->type = ((!active_local_sender_retain && |
8800895a PH |
2265 | ( |
2266 | (sender_local && !trusted_caller && !suppress_local_fixups) | |
2267 | || submission_mode | |
2268 | ) | |
059ec3d9 PH |
2269 | ) && |
2270 | (!resents_exist||is_resent))? | |
2271 | htype_old : htype_sender; | |
2272 | break; | |
2273 | ||
2274 | /* Remember the Subject: header for logging. There is no Resent-Subject */ | |
2275 | ||
2276 | case htype_subject: | |
2277 | subject_header = h; | |
2278 | break; | |
2279 | ||
2280 | /* "To:" gets flagged, and the existence of a recipient header is noted, | |
2281 | whether it's resent- or not. */ | |
2282 | ||
2283 | case htype_to: | |
2284 | h->type = htype_to; | |
2285 | /**** | |
2286 | to_or_cc_header_exists = TRUE; | |
2287 | ****/ | |
2288 | break; | |
2289 | } | |
2290 | } | |
2291 | ||
2292 | /* Extract recipients from the headers if that is required (the -t option). | |
2293 | Note that this is documented as being done *before* any address rewriting takes | |
2294 | place. There are two possibilities: | |
2295 | ||
2296 | (1) According to sendmail documentation for Solaris, IRIX, and HP-UX, any | |
2297 | recipients already listed are to be REMOVED from the message. Smail 3 works | |
2298 | like this. We need to build a non-recipients tree for that list, because in | |
2299 | subsequent processing this data is held in a tree and that's what the | |
2300 | spool_write_header() function expects. Make sure that non-recipient addresses | |
2301 | are fully qualified and rewritten if necessary. | |
2302 | ||
2303 | (2) According to other sendmail documentation, -t ADDS extracted recipients to | |
2304 | those in the command line arguments (and it is rumoured some other MTAs do | |
2305 | this). Therefore, there is an option to make Exim behave this way. | |
2306 | ||
2307 | *** Notes on "Resent-" header lines *** | |
2308 | ||
2309 | The presence of resent-headers in the message makes -t horribly ambiguous. | |
2310 | Experiments with sendmail showed that it uses recipients for all resent- | |
2311 | headers, totally ignoring the concept of "sets of resent- headers" as described | |
2312 | in RFC 2822 section 3.6.6. Sendmail also amalgamates them into a single set | |
2313 | with all the addresses in one instance of each header. | |
2314 | ||
2315 | This seems to me not to be at all sensible. Before release 4.20, Exim 4 gave an | |
2316 | error for -t if there were resent- headers in the message. However, after a | |
2317 | discussion on the mailing list, I've learned that there are MUAs that use | |
2318 | resent- headers with -t, and also that the stuff about sets of resent- headers | |
2319 | and their ordering in RFC 2822 is generally ignored. An MUA that submits a | |
2320 | message with -t and resent- header lines makes sure that only *its* resent- | |
2321 | headers are present; previous ones are often renamed as X-resent- for example. | |
2322 | ||
2323 | Consequently, Exim has been changed so that, if any resent- header lines are | |
2324 | present, the recipients are taken from all of the appropriate resent- lines, | |
2325 | and not from the ordinary To:, Cc:, etc. */ | |
2326 | ||
2327 | if (extract_recip) | |
2328 | { | |
2329 | int rcount = 0; | |
2330 | error_block **bnext = &bad_addresses; | |
2331 | ||
2332 | if (extract_addresses_remove_arguments) | |
2333 | { | |
2334 | while (recipients_count-- > 0) | |
2335 | { | |
2336 | uschar *s = rewrite_address(recipients_list[recipients_count].address, | |
2337 | TRUE, TRUE, global_rewrite_rules, rewrite_existflags); | |
2338 | tree_add_nonrecipient(s); | |
2339 | } | |
2340 | recipients_list = NULL; | |
2341 | recipients_count = recipients_list_max = 0; | |
2342 | } | |
2343 | ||
059ec3d9 PH |
2344 | /* Now scan the headers */ |
2345 | ||
2346 | for (h = header_list->next; h != NULL; h = h->next) | |
2347 | { | |
2348 | if ((h->type == htype_to || h->type == htype_cc || h->type == htype_bcc) && | |
2349 | (!contains_resent_headers || strncmpic(h->text, US"resent-", 7) == 0)) | |
2350 | { | |
2351 | uschar *s = Ustrchr(h->text, ':') + 1; | |
2352 | while (isspace(*s)) s++; | |
2353 | ||
1eccaa59 PH |
2354 | parse_allow_group = TRUE; /* Allow address group syntax */ |
2355 | ||
059ec3d9 PH |
2356 | while (*s != 0) |
2357 | { | |
2358 | uschar *ss = parse_find_address_end(s, FALSE); | |
2359 | uschar *recipient, *errmess, *p, *pp; | |
2360 | int start, end, domain; | |
2361 | ||
2362 | /* Check on maximum */ | |
2363 | ||
2364 | if (recipients_max > 0 && ++rcount > recipients_max) | |
2365 | { | |
2366 | give_local_error(ERRMESS_TOOMANYRECIP, US"too many recipients", | |
2367 | US"message rejected: ", error_rc, stdin, NULL); | |
2368 | /* Does not return */ | |
2369 | } | |
2370 | ||
2371 | /* Make a copy of the address, and remove any internal newlines. These | |
2372 | may be present as a result of continuations of the header line. The | |
2373 | white space that follows the newline must not be removed - it is part | |
2374 | of the header. */ | |
2375 | ||
2376 | pp = recipient = store_get(ss - s + 1); | |
2377 | for (p = s; p < ss; p++) if (*p != '\n') *pp++ = *p; | |
2378 | *pp = 0; | |
250b6871 | 2379 | |
8c5d388a | 2380 | #ifdef SUPPORT_I18N |
250b6871 JH |
2381 | { |
2382 | BOOL b = allow_utf8_domains; | |
2383 | allow_utf8_domains = TRUE; | |
2384 | #endif | |
059ec3d9 PH |
2385 | recipient = parse_extract_address(recipient, &errmess, &start, &end, |
2386 | &domain, FALSE); | |
2387 | ||
8c5d388a | 2388 | #ifdef SUPPORT_I18N |
250b6871 JH |
2389 | if (string_is_utf8(recipient)) |
2390 | message_smtputf8 = TRUE; | |
2391 | else | |
2392 | allow_utf8_domains = b; | |
2393 | } | |
2394 | #endif | |
2395 | ||
059ec3d9 PH |
2396 | /* Keep a list of all the bad addresses so we can send a single |
2397 | error message at the end. However, an empty address is not an error; | |
2398 | just ignore it. This can come from an empty group list like | |
2399 | ||
2400 | To: Recipients of list:; | |
2401 | ||
2402 | If there are no recipients at all, an error will occur later. */ | |
2403 | ||
2404 | if (recipient == NULL && Ustrcmp(errmess, "empty address") != 0) | |
2405 | { | |
2406 | int len = Ustrlen(s); | |
2407 | error_block *b = store_get(sizeof(error_block)); | |
2408 | while (len > 0 && isspace(s[len-1])) len--; | |
2409 | b->next = NULL; | |
2410 | b->text1 = string_printing(string_copyn(s, len)); | |
2411 | b->text2 = errmess; | |
2412 | *bnext = b; | |
2413 | bnext = &(b->next); | |
2414 | } | |
2415 | ||
2416 | /* If the recipient is already in the nonrecipients tree, it must | |
2417 | have appeared on the command line with the option extract_addresses_ | |
2418 | remove_arguments set. Do not add it to the recipients, and keep a note | |
2419 | that this has happened, in order to give a better error if there are | |
2420 | no recipients left. */ | |
2421 | ||
2422 | else if (recipient != NULL) | |
2423 | { | |
2424 | if (tree_search(tree_nonrecipients, recipient) == NULL) | |
2425 | receive_add_recipient(recipient, -1); | |
2426 | else | |
2427 | extracted_ignored = TRUE; | |
2428 | } | |
2429 | ||
2430 | /* Move on past this address */ | |
2431 | ||
2432 | s = ss + (*ss? 1:0); | |
2433 | while (isspace(*s)) s++; | |
1eccaa59 PH |
2434 | } /* Next address */ |
2435 | ||
2436 | parse_allow_group = FALSE; /* Reset group syntax flags */ | |
2437 | parse_found_group = FALSE; | |
059ec3d9 PH |
2438 | |
2439 | /* If this was the bcc: header, mark it "old", which means it | |
2440 | will be kept on the spool, but not transmitted as part of the | |
2441 | message. */ | |
2442 | ||
2cbb4081 | 2443 | if (h->type == htype_bcc) h->type = htype_old; |
059ec3d9 PH |
2444 | } /* For appropriate header line */ |
2445 | } /* For each header line */ | |
2446 | ||
059ec3d9 PH |
2447 | } |
2448 | ||
2449 | /* Now build the unique message id. This has changed several times over the | |
2450 | lifetime of Exim. This description was rewritten for Exim 4.14 (February 2003). | |
2451 | Retaining all the history in the comment has become too unwieldy - read | |
2452 | previous release sources if you want it. | |
2453 | ||
2454 | The message ID has 3 parts: tttttt-pppppp-ss. Each part is a number in base 62. | |
2455 | The first part is the current time, in seconds. The second part is the current | |
2456 | pid. Both are large enough to hold 32-bit numbers in base 62. The third part | |
2457 | can hold a number in the range 0-3843. It used to be a computed sequence | |
2458 | number, but is now the fractional component of the current time in units of | |
2459 | 1/2000 of a second (i.e. a value in the range 0-1999). After a message has been | |
2460 | received, Exim ensures that the timer has ticked at the appropriate level | |
2461 | before proceeding, to avoid duplication if the pid happened to be re-used | |
2462 | within the same time period. It seems likely that most messages will take at | |
2463 | least half a millisecond to be received, so no delay will normally be | |
2464 | necessary. At least for some time... | |
2465 | ||
2466 | There is a modification when localhost_number is set. Formerly this was allowed | |
2467 | to be as large as 255. Now it is restricted to the range 0-16, and the final | |
2468 | component of the message id becomes (localhost_number * 200) + fractional time | |
2469 | in units of 1/200 of a second (i.e. a value in the range 0-3399). | |
2470 | ||
2471 | Some not-really-Unix operating systems use case-insensitive file names (Darwin, | |
2472 | Cygwin). For these, we have to use base 36 instead of base 62. Luckily, this | |
2473 | still allows the tttttt field to hold a large enough number to last for some | |
2474 | more decades, and the final two-digit field can hold numbers up to 1295, which | |
2475 | is enough for milliseconds (instead of 1/2000 of a second). | |
2476 | ||
2477 | However, the pppppp field cannot hold a 32-bit pid, but it can hold a 31-bit | |
2478 | pid, so it is probably safe because pids have to be positive. The | |
2479 | localhost_number is restricted to 0-10 for these hosts, and when it is set, the | |
2480 | final field becomes (localhost_number * 100) + fractional time in centiseconds. | |
2481 | ||
2482 | Note that string_base62() returns its data in a static storage block, so it | |
2483 | must be copied before calling string_base62() again. It always returns exactly | |
2484 | 6 characters. | |
2485 | ||
2486 | There doesn't seem to be anything in the RFC which requires a message id to | |
2487 | start with a letter, but Smail was changed to ensure this. The external form of | |
2488 | the message id (as supplied by string expansion) therefore starts with an | |
2489 | additional leading 'E'. The spool file names do not include this leading | |
2490 | letter and it is not used internally. | |
2491 | ||
2492 | NOTE: If ever the format of message ids is changed, the regular expression for | |
2493 | checking that a string is in this format must be updated in a corresponding | |
2494 | way. It appears in the initializing code in exim.c. The macro MESSAGE_ID_LENGTH | |
2495 | must also be changed to reflect the correct string length. Then, of course, | |
2496 | other programs that rely on the message id format will need updating too. */ | |
2497 | ||
2498 | Ustrncpy(message_id, string_base62((long int)(message_id_tv.tv_sec)), 6); | |
2499 | message_id[6] = '-'; | |
2500 | Ustrncpy(message_id + 7, string_base62((long int)getpid()), 6); | |
2501 | ||
2502 | /* Deal with the case where the host number is set. The value of the number was | |
2503 | checked when it was read, to ensure it isn't too big. The timing granularity is | |
2504 | left in id_resolution so that an appropriate wait can be done after receiving | |
2505 | the message, if necessary (we hope it won't be). */ | |
2506 | ||
2507 | if (host_number_string != NULL) | |
2508 | { | |
2509 | id_resolution = (BASE_62 == 62)? 5000 : 10000; | |
2510 | sprintf(CS(message_id + MESSAGE_ID_LENGTH - 3), "-%2s", | |
2511 | string_base62((long int)( | |
2512 | host_number * (1000000/id_resolution) + | |
2513 | message_id_tv.tv_usec/id_resolution)) + 4); | |
2514 | } | |
2515 | ||
2516 | /* Host number not set: final field is just the fractional time at an | |
2517 | appropriate resolution. */ | |
2518 | ||
2519 | else | |
2520 | { | |
2521 | id_resolution = (BASE_62 == 62)? 500 : 1000; | |
2522 | sprintf(CS(message_id + MESSAGE_ID_LENGTH - 3), "-%2s", | |
2523 | string_base62((long int)(message_id_tv.tv_usec/id_resolution)) + 4); | |
2524 | } | |
2525 | ||
2526 | /* Add the current message id onto the current process info string if | |
2527 | it will fit. */ | |
2528 | ||
2529 | (void)string_format(process_info + process_info_len, | |
2530 | PROCESS_INFO_SIZE - process_info_len, " id=%s", message_id); | |
2531 | ||
2532 | /* If we are using multiple input directories, set up the one for this message | |
2533 | to be the least significant base-62 digit of the time of arrival. Otherwise | |
2534 | ensure that it is an empty string. */ | |
2535 | ||
a2da3176 | 2536 | message_subdir[0] = split_spool_directory ? message_id[5] : 0; |
059ec3d9 PH |
2537 | |
2538 | /* Now that we have the message-id, if there is no message-id: header, generate | |
8800895a PH |
2539 | one, but only for local (without suppress_local_fixups) or submission mode |
2540 | messages. This can be user-configured if required, but we had better flatten | |
2541 | any illegal characters therein. */ | |
059ec3d9 | 2542 | |
8800895a PH |
2543 | if (msgid_header == NULL && |
2544 | ((sender_host_address == NULL && !suppress_local_fixups) | |
2545 | || submission_mode)) | |
059ec3d9 PH |
2546 | { |
2547 | uschar *p; | |
2548 | uschar *id_text = US""; | |
2549 | uschar *id_domain = primary_hostname; | |
2550 | ||
2551 | /* Permit only letters, digits, dots, and hyphens in the domain */ | |
2552 | ||
2553 | if (message_id_domain != NULL) | |
2554 | { | |
2555 | uschar *new_id_domain = expand_string(message_id_domain); | |
2556 | if (new_id_domain == NULL) | |
2557 | { | |
2558 | if (!expand_string_forcedfail) | |
2559 | log_write(0, LOG_MAIN|LOG_PANIC, | |
2560 | "expansion of \"%s\" (message_id_header_domain) " | |
2561 | "failed: %s", message_id_domain, expand_string_message); | |
2562 | } | |
2563 | else if (*new_id_domain != 0) | |
2564 | { | |
2565 | id_domain = new_id_domain; | |
2566 | for (p = id_domain; *p != 0; p++) | |
2567 | if (!isalnum(*p) && *p != '.') *p = '-'; /* No need to test '-' ! */ | |
2568 | } | |
2569 | } | |
2570 | ||
2571 | /* Permit all characters except controls and RFC 2822 specials in the | |
2572 | additional text part. */ | |
2573 | ||
2574 | if (message_id_text != NULL) | |
2575 | { | |
2576 | uschar *new_id_text = expand_string(message_id_text); | |
2577 | if (new_id_text == NULL) | |
2578 | { | |
2579 | if (!expand_string_forcedfail) | |
2580 | log_write(0, LOG_MAIN|LOG_PANIC, | |
2581 | "expansion of \"%s\" (message_id_header_text) " | |
2582 | "failed: %s", message_id_text, expand_string_message); | |
2583 | } | |
2584 | else if (*new_id_text != 0) | |
2585 | { | |
2586 | id_text = new_id_text; | |
2587 | for (p = id_text; *p != 0; p++) | |
2588 | if (mac_iscntrl_or_special(*p)) *p = '-'; | |
2589 | } | |
2590 | } | |
2591 | ||
e7e680d6 PP |
2592 | /* Add the header line |
2593 | * Resent-* headers are prepended, per RFC 5322 3.6.6. Non-Resent-* are | |
2594 | * appended, to preserve classical expectations of header ordering. */ | |
059ec3d9 | 2595 | |
e7e680d6 | 2596 | header_add_at_position(!resents_exist, NULL, FALSE, htype_id, |
5eb690a1 NM |
2597 | "%sMessage-Id: <%s%s%s@%s>\n", resent_prefix, message_id_external, |
2598 | (*id_text == 0)? "" : ".", id_text, id_domain); | |
059ec3d9 PH |
2599 | } |
2600 | ||
2601 | /* If we are to log recipients, keep a copy of the raw ones before any possible | |
2602 | rewriting. Must copy the count, because later ACLs and the local_scan() | |
2603 | function may mess with the real recipients. */ | |
2604 | ||
6c6d6e48 | 2605 | if (LOGGING(received_recipients)) |
059ec3d9 PH |
2606 | { |
2607 | raw_recipients = store_get(recipients_count * sizeof(uschar *)); | |
2608 | for (i = 0; i < recipients_count; i++) | |
2609 | raw_recipients[i] = string_copy(recipients_list[i].address); | |
2610 | raw_recipients_count = recipients_count; | |
2611 | } | |
2612 | ||
2613 | /* Ensure the recipients list is fully qualified and rewritten. Unqualified | |
2614 | recipients will get here only if the conditions were right (allow_unqualified_ | |
2615 | recipient is TRUE). */ | |
2616 | ||
2617 | for (i = 0; i < recipients_count; i++) | |
2618 | recipients_list[i].address = | |
2619 | rewrite_address(recipients_list[i].address, TRUE, TRUE, | |
2620 | global_rewrite_rules, rewrite_existflags); | |
2621 | ||
8800895a PH |
2622 | /* If there is no From: header, generate one for local (without |
2623 | suppress_local_fixups) or submission_mode messages. If there is no sender | |
2624 | address, but the sender is local or this is a local delivery error, use the | |
2625 | originator login. This shouldn't happen for genuine bounces, but might happen | |
2626 | for autoreplies. The addition of From: must be done *before* checking for the | |
2627 | possible addition of a Sender: header, because untrusted_set_sender allows an | |
2628 | untrusted user to set anything in the envelope (which might then get info | |
2629 | From:) but we still want to ensure a valid Sender: if it is required. */ | |
2630 | ||
2631 | if (from_header == NULL && | |
2632 | ((sender_host_address == NULL && !suppress_local_fixups) | |
2633 | || submission_mode)) | |
059ec3d9 | 2634 | { |
2fe1a124 PH |
2635 | uschar *oname = US""; |
2636 | ||
2637 | /* Use the originator_name if this is a locally submitted message and the | |
2638 | caller is not trusted. For trusted callers, use it only if -F was used to | |
2639 | force its value or if we have a non-SMTP message for which -f was not used | |
2640 | to set the sender. */ | |
2641 | ||
2642 | if (sender_host_address == NULL) | |
2643 | { | |
2644 | if (!trusted_caller || sender_name_forced || | |
2645 | (!smtp_input && !sender_address_forced)) | |
2646 | oname = originator_name; | |
2647 | } | |
2648 | ||
2649 | /* For non-locally submitted messages, the only time we use the originator | |
2650 | name is when it was forced by the /name= option on control=submission. */ | |
2651 | ||
2652 | else | |
2653 | { | |
2654 | if (submission_name != NULL) oname = submission_name; | |
2655 | } | |
2656 | ||
059ec3d9 PH |
2657 | /* Envelope sender is empty */ |
2658 | ||
2659 | if (sender_address[0] == 0) | |
2660 | { | |
87ba3f5f PH |
2661 | uschar *fromstart, *fromend; |
2662 | ||
2663 | fromstart = string_sprintf("%sFrom: %s%s", resent_prefix, | |
2fe1a124 PH |
2664 | oname, (oname[0] == 0)? "" : " <"); |
2665 | fromend = (oname[0] == 0)? US"" : US">"; | |
87ba3f5f | 2666 | |
059ec3d9 PH |
2667 | if (sender_local || local_error_message) |
2668 | { | |
87ba3f5f PH |
2669 | header_add(htype_from, "%s%s@%s%s\n", fromstart, |
2670 | local_part_quote(originator_login), qualify_domain_sender, | |
2671 | fromend); | |
059ec3d9 PH |
2672 | } |
2673 | else if (submission_mode && authenticated_id != NULL) | |
2674 | { | |
2675 | if (submission_domain == NULL) | |
2676 | { | |
87ba3f5f PH |
2677 | header_add(htype_from, "%s%s@%s%s\n", fromstart, |
2678 | local_part_quote(authenticated_id), qualify_domain_sender, | |
2679 | fromend); | |
059ec3d9 PH |
2680 | } |
2681 | else if (submission_domain[0] == 0) /* empty => whole address set */ | |
2682 | { | |
87ba3f5f PH |
2683 | header_add(htype_from, "%s%s%s\n", fromstart, authenticated_id, |
2684 | fromend); | |
059ec3d9 PH |
2685 | } |
2686 | else | |
2687 | { | |
87ba3f5f PH |
2688 | header_add(htype_from, "%s%s@%s%s\n", fromstart, |
2689 | local_part_quote(authenticated_id), submission_domain, | |
2690 | fromend); | |
059ec3d9 PH |
2691 | } |
2692 | from_header = header_last; /* To get it checked for Sender: */ | |
2693 | } | |
2694 | } | |
2695 | ||
2696 | /* There is a non-null envelope sender. Build the header using the original | |
2697 | sender address, before any rewriting that might have been done while | |
2698 | verifying it. */ | |
2699 | ||
2700 | else | |
2701 | { | |
87ba3f5f | 2702 | header_add(htype_from, "%sFrom: %s%s%s%s\n", resent_prefix, |
2fe1a124 PH |
2703 | oname, |
2704 | (oname[0] == 0)? "" : " <", | |
87ba3f5f PH |
2705 | (sender_address_unrewritten == NULL)? |
2706 | sender_address : sender_address_unrewritten, | |
2fe1a124 | 2707 | (oname[0] == 0)? "" : ">"); |
059ec3d9 PH |
2708 | |
2709 | from_header = header_last; /* To get it checked for Sender: */ | |
2710 | } | |
2711 | } | |
2712 | ||
2713 | ||
8800895a PH |
2714 | /* If the sender is local (without suppress_local_fixups), or if we are in |
2715 | submission mode and there is an authenticated_id, check that an existing From: | |
2716 | is correct, and if not, generate a Sender: header, unless disabled. Any | |
2717 | previously-existing Sender: header was removed above. Note that sender_local, | |
2718 | as well as being TRUE if the caller of exim is not trusted, is also true if a | |
2719 | trusted caller did not supply a -f argument for non-smtp input. To allow | |
2720 | trusted callers to forge From: without supplying -f, we have to test explicitly | |
2721 | here. If the From: header contains more than one address, then the call to | |
2722 | parse_extract_address fails, and a Sender: header is inserted, as required. */ | |
059ec3d9 PH |
2723 | |
2724 | if (from_header != NULL && | |
69358f02 | 2725 | (active_local_from_check && |
8800895a | 2726 | ((sender_local && !trusted_caller && !suppress_local_fixups) || |
69358f02 | 2727 | (submission_mode && authenticated_id != NULL)) |
059ec3d9 PH |
2728 | )) |
2729 | { | |
2730 | BOOL make_sender = TRUE; | |
2731 | int start, end, domain; | |
2732 | uschar *errmess; | |
2733 | uschar *from_address = | |
2734 | parse_extract_address(Ustrchr(from_header->text, ':') + 1, &errmess, | |
2735 | &start, &end, &domain, FALSE); | |
2736 | uschar *generated_sender_address; | |
2737 | ||
2738 | if (submission_mode) | |
2739 | { | |
2740 | if (submission_domain == NULL) | |
2741 | { | |
2742 | generated_sender_address = string_sprintf("%s@%s", | |
2743 | local_part_quote(authenticated_id), qualify_domain_sender); | |
2744 | } | |
2745 | else if (submission_domain[0] == 0) /* empty => full address */ | |
2746 | { | |
2747 | generated_sender_address = string_sprintf("%s", | |
2748 | authenticated_id); | |
2749 | } | |
2750 | else | |
2751 | { | |
2752 | generated_sender_address = string_sprintf("%s@%s", | |
2753 | local_part_quote(authenticated_id), submission_domain); | |
2754 | } | |
2755 | } | |
2756 | else | |
2757 | generated_sender_address = string_sprintf("%s@%s", | |
2758 | local_part_quote(originator_login), qualify_domain_sender); | |
2759 | ||
2760 | /* Remove permitted prefixes and suffixes from the local part of the From: | |
2761 | address before doing the comparison with the generated sender. */ | |
2762 | ||
2763 | if (from_address != NULL) | |
2764 | { | |
2765 | int slen; | |
2766 | uschar *at = (domain == 0)? NULL : from_address + domain - 1; | |
2767 | ||
2768 | if (at != NULL) *at = 0; | |
2769 | from_address += route_check_prefix(from_address, local_from_prefix); | |
2770 | slen = route_check_suffix(from_address, local_from_suffix); | |
2771 | if (slen > 0) | |
2772 | { | |
2773 | memmove(from_address+slen, from_address, Ustrlen(from_address)-slen); | |
2774 | from_address += slen; | |
2775 | } | |
2776 | if (at != NULL) *at = '@'; | |
2777 | ||
2778 | if (strcmpic(generated_sender_address, from_address) == 0 || | |
2779 | (domain == 0 && strcmpic(from_address, originator_login) == 0)) | |
2780 | make_sender = FALSE; | |
2781 | } | |
2782 | ||
2783 | /* We have to cause the Sender header to be rewritten if there are | |
2784 | appropriate rewriting rules. */ | |
2785 | ||
2786 | if (make_sender) | |
2787 | { | |
2fe1a124 | 2788 | if (submission_mode && submission_name == NULL) |
059ec3d9 PH |
2789 | header_add(htype_sender, "%sSender: %s\n", resent_prefix, |
2790 | generated_sender_address); | |
2791 | else | |
2792 | header_add(htype_sender, "%sSender: %s <%s>\n", | |
2fe1a124 PH |
2793 | resent_prefix, |
2794 | submission_mode? submission_name : originator_name, | |
2795 | generated_sender_address); | |
059ec3d9 | 2796 | } |
87ba3f5f PH |
2797 | |
2798 | /* Ensure that a non-null envelope sender address corresponds to the | |
2799 | submission mode sender address. */ | |
2800 | ||
2801 | if (submission_mode && sender_address[0] != 0) | |
2802 | { | |
2803 | if (sender_address_unrewritten == NULL) | |
2804 | sender_address_unrewritten = sender_address; | |
2805 | sender_address = generated_sender_address; | |
089793a4 TF |
2806 | if (Ustrcmp(sender_address_unrewritten, generated_sender_address) != 0) |
2807 | log_write(L_address_rewrite, LOG_MAIN, | |
2808 | "\"%s\" from env-from rewritten as \"%s\" by submission mode", | |
2809 | sender_address_unrewritten, generated_sender_address); | |
87ba3f5f | 2810 | } |
059ec3d9 PH |
2811 | } |
2812 | ||
059ec3d9 PH |
2813 | /* If there are any rewriting rules, apply them to the sender address, unless |
2814 | it has already been rewritten as part of verification for SMTP input. */ | |
2815 | ||
2816 | if (global_rewrite_rules != NULL && sender_address_unrewritten == NULL && | |
2817 | sender_address[0] != 0) | |
2818 | { | |
2819 | sender_address = rewrite_address(sender_address, FALSE, TRUE, | |
2820 | global_rewrite_rules, rewrite_existflags); | |
2821 | DEBUG(D_receive|D_rewrite) | |
2822 | debug_printf("rewritten sender = %s\n", sender_address); | |
2823 | } | |
2824 | ||
2825 | ||
2826 | /* The headers must be run through rewrite_header(), because it ensures that | |
2827 | addresses are fully qualified, as well as applying any rewriting rules that may | |
2828 | exist. | |
2829 | ||
2830 | Qualification of header addresses in a message from a remote host happens only | |
2831 | if the host is in sender_unqualified_hosts or recipient_unqualified hosts, as | |
2832 | appropriate. For local messages, qualification always happens, unless -bnq is | |
2833 | used to explicitly suppress it. No rewriting is done for an unqualified address | |
2834 | that is left untouched. | |
2835 | ||
2836 | We start at the second header, skipping our own Received:. This rewriting is | |
2837 | documented as happening *after* recipient addresses are taken from the headers | |
2838 | by the -t command line option. An added Sender: gets rewritten here. */ | |
2839 | ||
2840 | for (h = header_list->next; h != NULL; h = h->next) | |
2841 | { | |
2842 | header_line *newh = rewrite_header(h, NULL, NULL, global_rewrite_rules, | |
2843 | rewrite_existflags, TRUE); | |
2844 | if (newh != NULL) h = newh; | |
2845 | } | |
2846 | ||
2847 | ||
2848 | /* An RFC 822 (sic) message is not legal unless it has at least one of "to", | |
2cbb4081 | 2849 | "cc", or "bcc". Note that although the minimal examples in RFC 822 show just |
059ec3d9 PH |
2850 | "to" or "bcc", the full syntax spec allows "cc" as well. If any resent- header |
2851 | exists, this applies to the set of resent- headers rather than the normal set. | |
2852 | ||
2cbb4081 PH |
2853 | The requirement for a recipient header has been removed in RFC 2822. At this |
2854 | point in the code, earlier versions of Exim added a To: header for locally | |
2855 | submitted messages, and an empty Bcc: header for others. In the light of the | |
2856 | changes in RFC 2822, this was dropped in November 2003. */ | |
059ec3d9 | 2857 | |
059ec3d9 PH |
2858 | |
2859 | /* If there is no date header, generate one if the message originates locally | |
8800895a PH |
2860 | (i.e. not over TCP/IP) and suppress_local_fixups is not set, or if the |
2861 | submission mode flag is set. Messages without Date: are not valid, but it seems | |
e7e680d6 PP |
2862 | to be more confusing if Exim adds one to all remotely-originated messages. |
2863 | As per Message-Id, we prepend if resending, else append. | |
2864 | */ | |
059ec3d9 | 2865 | |
8800895a PH |
2866 | if (!date_header_exists && |
2867 | ((sender_host_address == NULL && !suppress_local_fixups) | |
2868 | || submission_mode)) | |
e7e680d6 PP |
2869 | header_add_at_position(!resents_exist, NULL, FALSE, htype_other, |
2870 | "%sDate: %s\n", resent_prefix, tod_stamp(tod_full)); | |
059ec3d9 PH |
2871 | |
2872 | search_tidyup(); /* Free any cached resources */ | |
2873 | ||
2874 | /* Show the complete set of headers if debugging. Note that the first one (the | |
2875 | new Received:) has not yet been set. */ | |
2876 | ||
2877 | DEBUG(D_receive) | |
2878 | { | |
2879 | debug_printf(">>Headers after rewriting and local additions:\n"); | |
2880 | for (h = header_list->next; h != NULL; h = h->next) | |
2881 | debug_printf("%c %s", h->type, h->text); | |
2882 | debug_printf("\n"); | |
2883 | } | |
2884 | ||
2885 | /* The headers are now complete in store. If we are running in filter | |
2886 | testing mode, that is all this function does. Return TRUE if the message | |
2887 | ended with a dot. */ | |
2888 | ||
f05da2e8 | 2889 | if (filter_test != FTEST_NONE) |
059ec3d9 PH |
2890 | { |
2891 | process_info[process_info_len] = 0; | |
2892 | return message_ended == END_DOT; | |
2893 | } | |
2894 | ||
7e3ce68e JH |
2895 | /*XXX CHUNKING: need to cancel cutthrough under BDAT, for now. In future, |
2896 | think more if it could be handled. Cannot do onward CHUNKING unless | |
2897 | inbound is, but inbound chunking ought to be ok with outbound plain. | |
2898 | Could we do onward CHUNKING given inbound CHUNKING? | |
2899 | */ | |
2900 | if (chunking_state > CHUNKING_OFFERED) | |
2901 | cancel_cutthrough_connection("chunking active"); | |
2902 | ||
817d9f57 | 2903 | /* Cutthrough delivery: |
5032d1cf JH |
2904 | We have to create the Received header now rather than at the end of reception, |
2905 | so the timestamp behaviour is a change to the normal case. | |
2906 | XXX Ensure this gets documented XXX. | |
2907 | Having created it, send the headers to the destination. */ | |
2908 | if (cutthrough.fd >= 0) | |
e4bdf652 | 2909 | { |
817d9f57 JH |
2910 | if (received_count > received_headers_max) |
2911 | { | |
2e5b33cd | 2912 | cancel_cutthrough_connection("too many headers"); |
817d9f57 JH |
2913 | if (smtp_input) receive_swallow_smtp(); /* Swallow incoming SMTP */ |
2914 | log_write(0, LOG_MAIN|LOG_REJECT, "rejected from <%s>%s%s%s%s: " | |
2915 | "Too many \"Received\" headers", | |
2916 | sender_address, | |
2917 | (sender_fullhost == NULL)? "" : " H=", | |
2918 | (sender_fullhost == NULL)? US"" : sender_fullhost, | |
2919 | (sender_ident == NULL)? "" : " U=", | |
2920 | (sender_ident == NULL)? US"" : sender_ident); | |
2921 | message_id[0] = 0; /* Indicate no message accepted */ | |
2922 | smtp_reply = US"550 Too many \"Received\" headers - suspected mail loop"; | |
2923 | goto TIDYUP; /* Skip to end of function */ | |
2924 | } | |
e4bdf652 | 2925 | received_header_gen(); |
578d43dc | 2926 | add_acl_headers(ACL_WHERE_RCPT, US"MAIL or RCPT"); |
e4bdf652 JH |
2927 | (void) cutthrough_headers_send(); |
2928 | } | |
61147df4 | 2929 | |
e4bdf652 | 2930 | |
059ec3d9 PH |
2931 | /* Open a new spool file for the data portion of the message. We need |
2932 | to access it both via a file descriptor and a stream. Try to make the | |
41313d92 | 2933 | directory if it isn't there. */ |
059ec3d9 | 2934 | |
41313d92 | 2935 | spool_name = spool_fname(US"input", message_subdir, message_id, US"-D"); |
a2da3176 JH |
2936 | DEBUG(D_receive) debug_printf("Data file name: %s\n", spool_name); |
2937 | ||
2938 | if ((data_fd = Uopen(spool_name, O_RDWR|O_CREAT|O_EXCL, SPOOL_MODE)) < 0) | |
059ec3d9 PH |
2939 | { |
2940 | if (errno == ENOENT) | |
2941 | { | |
0971ec06 | 2942 | (void) directory_make(spool_directory, |
41313d92 JH |
2943 | spool_sname(US"input", message_subdir), |
2944 | INPUT_DIRECTORY_MODE, TRUE); | |
059ec3d9 PH |
2945 | data_fd = Uopen(spool_name, O_RDWR|O_CREAT|O_EXCL, SPOOL_MODE); |
2946 | } | |
2947 | if (data_fd < 0) | |
2948 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to create spool file %s: %s", | |
2949 | spool_name, strerror(errno)); | |
2950 | } | |
2951 | ||
2952 | /* Make sure the file's group is the Exim gid, and double-check the mode | |
2953 | because the group setting doesn't always get set automatically. */ | |
2954 | ||
1ac6b2e7 JH |
2955 | if (fchown(data_fd, exim_uid, exim_gid)) |
2956 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, | |
2957 | "Failed setting ownership on spool file %s: %s", | |
2958 | spool_name, strerror(errno)); | |
ff790e47 | 2959 | (void)fchmod(data_fd, SPOOL_MODE); |
059ec3d9 PH |
2960 | |
2961 | /* We now have data file open. Build a stream for it and lock it. We lock only | |
2962 | the first line of the file (containing the message ID) because otherwise there | |
2963 | are problems when Exim is run under Cygwin (I'm told). See comments in | |
2964 | spool_in.c, where the same locking is done. */ | |
2965 | ||
2966 | data_file = fdopen(data_fd, "w+"); | |
2967 | lock_data.l_type = F_WRLCK; | |
2968 | lock_data.l_whence = SEEK_SET; | |
2969 | lock_data.l_start = 0; | |
2970 | lock_data.l_len = SPOOL_DATA_START_OFFSET; | |
2971 | ||
2972 | if (fcntl(data_fd, F_SETLK, &lock_data) < 0) | |
2973 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Cannot lock %s (%d): %s", spool_name, | |
2974 | errno, strerror(errno)); | |
2975 | ||
2976 | /* We have an open, locked data file. Write the message id to it to make it | |
2977 | self-identifying. Then read the remainder of the input of this message and | |
2978 | write it to the data file. If the variable next != NULL, it contains the first | |
2979 | data line (which was read as a header but then turned out not to have the right | |
2980 | format); write it (remembering that it might contain binary zeros). The result | |
2981 | of fwrite() isn't inspected; instead we call ferror() below. */ | |
2982 | ||
2983 | fprintf(data_file, "%s-D\n", message_id); | |
2984 | if (next != NULL) | |
2985 | { | |
2986 | uschar *s = next->text; | |
2987 | int len = next->slen; | |
1ac6b2e7 | 2988 | len = fwrite(s, 1, len, data_file); len = len; /* compiler quietening */ |
059ec3d9 PH |
2989 | body_linecount++; /* Assumes only 1 line */ |
2990 | } | |
2991 | ||
2992 | /* Note that we might already be at end of file, or the logical end of file | |
2993 | (indicated by '.'), or might have encountered an error while writing the | |
2994 | message id or "next" line. */ | |
2995 | ||
2996 | if (!ferror(data_file) && !(receive_feof)() && message_ended != END_DOT) | |
2997 | { | |
2998 | if (smtp_input) | |
2999 | { | |
7e3ce68e JH |
3000 | message_ended = chunking_state > CHUNKING_OFFERED |
3001 | ? read_message_bdat_smtp(data_file) | |
3002 | : read_message_data_smtp(data_file); | |
059ec3d9 PH |
3003 | receive_linecount++; /* The terminating "." line */ |
3004 | } | |
3005 | else message_ended = read_message_data(data_file); | |
3006 | ||
3007 | receive_linecount += body_linecount; /* For BSMTP errors mainly */ | |
2e0c1448 | 3008 | message_linecount += body_linecount; |
059ec3d9 | 3009 | |
7e3ce68e | 3010 | switch (message_ended) |
059ec3d9 | 3011 | { |
7e3ce68e | 3012 | /* Handle premature termination of SMTP */ |
059ec3d9 | 3013 | |
7e3ce68e JH |
3014 | case END_EOF: |
3015 | if (smtp_input) | |
3016 | { | |
3017 | Uunlink(spool_name); /* Lose data file when closed */ | |
3018 | cancel_cutthrough_connection("sender closed connection"); | |
3019 | message_id[0] = 0; /* Indicate no message accepted */ | |
3020 | smtp_reply = handle_lost_connection(US""); | |
3021 | smtp_yield = FALSE; | |
3022 | goto TIDYUP; /* Skip to end of function */ | |
3023 | } | |
3024 | break; | |
059ec3d9 | 3025 | |
7e3ce68e JH |
3026 | /* Handle message that is too big. Don't use host_or_ident() in the log |
3027 | message; we want to see the ident value even for non-remote messages. */ | |
059ec3d9 | 3028 | |
7e3ce68e JH |
3029 | case END_SIZE: |
3030 | Uunlink(spool_name); /* Lose the data file when closed */ | |
3031 | cancel_cutthrough_connection("mail too big"); | |
3032 | if (smtp_input) receive_swallow_smtp(); /* Swallow incoming SMTP */ | |
059ec3d9 | 3033 | |
7e3ce68e JH |
3034 | log_write(L_size_reject, LOG_MAIN|LOG_REJECT, "rejected from <%s>%s%s%s%s: " |
3035 | "message too big: read=%d max=%d", | |
3036 | sender_address, | |
3037 | (sender_fullhost == NULL)? "" : " H=", | |
3038 | (sender_fullhost == NULL)? US"" : sender_fullhost, | |
3039 | (sender_ident == NULL)? "" : " U=", | |
3040 | (sender_ident == NULL)? US"" : sender_ident, | |
3041 | message_size, | |
3042 | thismessage_size_limit); | |
3043 | ||
3044 | if (smtp_input) | |
3045 | { | |
3046 | smtp_reply = US"552 Message size exceeds maximum permitted"; | |
3047 | message_id[0] = 0; /* Indicate no message accepted */ | |
3048 | goto TIDYUP; /* Skip to end of function */ | |
3049 | } | |
3050 | else | |
3051 | { | |
3052 | fseek(data_file, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3053 | give_local_error(ERRMESS_TOOBIG, | |
3054 | string_sprintf("message too big (max=%d)", thismessage_size_limit), | |
3055 | US"message rejected: ", error_rc, data_file, header_list); | |
3056 | /* Does not return */ | |
3057 | } | |
3058 | break; | |
3059 | ||
3060 | /* Handle bad BDAT protocol sequence */ | |
3061 | ||
3062 | case END_PROTOCOL: | |
3063 | Uunlink(spool_name); /* Lose the data file when closed */ | |
3064 | cancel_cutthrough_connection("sender protocol error"); | |
3065 | smtp_reply = US""; /* Response already sent */ | |
3066 | message_id[0] = 0; /* Indicate no message accepted */ | |
3067 | goto TIDYUP; /* Skip to end of function */ | |
059ec3d9 PH |
3068 | } |
3069 | } | |
3070 | ||
3071 | /* Restore the standard SIGALRM handler for any subsequent processing. (For | |
3072 | example, there may be some expansion in an ACL that uses a timer.) */ | |
3073 | ||
3074 | os_non_restarting_signal(SIGALRM, sigalrm_handler); | |
3075 | ||
3076 | /* The message body has now been read into the data file. Call fflush() to | |
3077 | empty the buffers in C, and then call fsync() to get the data written out onto | |
3078 | the disk, as fflush() doesn't do this (or at least, it isn't documented as | |
3079 | having to do this). If there was an I/O error on either input or output, | |
3080 | attempt to send an error message, and unlink the spool file. For non-SMTP input | |
3081 | we can then give up. Note that for SMTP input we must swallow the remainder of | |
3082 | the input in cases of output errors, since the far end doesn't expect to see | |
3083 | anything until the terminating dot line is sent. */ | |
3084 | ||
3085 | if (fflush(data_file) == EOF || ferror(data_file) || | |
54fc8428 | 3086 | EXIMfsync(fileno(data_file)) < 0 || (receive_ferror)()) |
059ec3d9 PH |
3087 | { |
3088 | uschar *msg_errno = US strerror(errno); | |
3089 | BOOL input_error = (receive_ferror)() != 0; | |
3090 | uschar *msg = string_sprintf("%s error (%s) while receiving message from %s", | |
3091 | input_error? "Input read" : "Spool write", | |
3092 | msg_errno, | |
3093 | (sender_fullhost != NULL)? sender_fullhost : sender_ident); | |
3094 | ||
3095 | log_write(0, LOG_MAIN, "Message abandoned: %s", msg); | |
3096 | Uunlink(spool_name); /* Lose the data file */ | |
2e5b33cd | 3097 | cancel_cutthrough_connection("error writing spoolfile"); |
059ec3d9 PH |
3098 | |
3099 | if (smtp_input) | |
3100 | { | |
3101 | if (input_error) | |
3102 | smtp_reply = US"451 Error while reading input data"; | |
3103 | else | |
3104 | { | |
3105 | smtp_reply = US"451 Error while writing spool file"; | |
3106 | receive_swallow_smtp(); | |
3107 | } | |
3108 | message_id[0] = 0; /* Indicate no message accepted */ | |
3109 | goto TIDYUP; /* Skip to end of function */ | |
3110 | } | |
3111 | ||
3112 | else | |
3113 | { | |
3114 | fseek(data_file, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3115 | give_local_error(ERRMESS_IOERR, msg, US"", error_rc, data_file, | |
3116 | header_list); | |
3117 | /* Does not return */ | |
3118 | } | |
3119 | } | |
3120 | ||
3121 | ||
3122 | /* No I/O errors were encountered while writing the data file. */ | |
3123 | ||
3124 | DEBUG(D_receive) debug_printf("Data file written for message %s\n", message_id); | |
3125 | ||
3126 | ||
3127 | /* If there were any bad addresses extracted by -t, or there were no recipients | |
3128 | left after -t, send a message to the sender of this message, or write it to | |
3129 | stderr if the error handling option is set that way. Note that there may | |
3130 | legitimately be no recipients for an SMTP message if they have all been removed | |
3131 | by "discard". | |
3132 | ||
3133 | We need to rewind the data file in order to read it. In the case of no | |
3134 | recipients or stderr error writing, throw the data file away afterwards, and | |
3135 | exit. (This can't be SMTP, which always ensures there's at least one | |
3136 | syntactically good recipient address.) */ | |
3137 | ||
3138 | if (extract_recip && (bad_addresses != NULL || recipients_count == 0)) | |
3139 | { | |
3140 | DEBUG(D_receive) | |
3141 | { | |
3142 | if (recipients_count == 0) debug_printf("*** No recipients\n"); | |
3143 | if (bad_addresses != NULL) | |
3144 | { | |
3145 | error_block *eblock = bad_addresses; | |
3146 | debug_printf("*** Bad address(es)\n"); | |
3147 | while (eblock != NULL) | |
3148 | { | |
3149 | debug_printf(" %s: %s\n", eblock->text1, eblock->text2); | |
3150 | eblock = eblock->next; | |
3151 | } | |
3152 | } | |
3153 | } | |
3154 | ||
3155 | fseek(data_file, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3156 | ||
3157 | /* If configured to send errors to the sender, but this fails, force | |
3158 | a failure error code. We use a special one for no recipients so that it | |
3159 | can be detected by the autoreply transport. Otherwise error_rc is set to | |
3160 | errors_sender_rc, which is EXIT_FAILURE unless -oee was given, in which case | |
3161 | it is EXIT_SUCCESS. */ | |
3162 | ||
3163 | if (error_handling == ERRORS_SENDER) | |
3164 | { | |
3165 | if (!moan_to_sender( | |
3166 | (bad_addresses == NULL)? | |
3167 | (extracted_ignored? ERRMESS_IGADDRESS : ERRMESS_NOADDRESS) : | |
3168 | (recipients_list == NULL)? ERRMESS_BADNOADDRESS : ERRMESS_BADADDRESS, | |
3169 | bad_addresses, header_list, data_file, FALSE)) | |
3170 | error_rc = (bad_addresses == NULL)? EXIT_NORECIPIENTS : EXIT_FAILURE; | |
3171 | } | |
3172 | else | |
3173 | { | |
3174 | if (bad_addresses == NULL) | |
3175 | { | |
3176 | if (extracted_ignored) | |
3177 | fprintf(stderr, "exim: all -t recipients overridden by command line\n"); | |
3178 | else | |
3179 | fprintf(stderr, "exim: no recipients in message\n"); | |
3180 | } | |
3181 | else | |
3182 | { | |
3183 | fprintf(stderr, "exim: invalid address%s", | |
3184 | (bad_addresses->next == NULL)? ":" : "es:\n"); | |
3185 | while (bad_addresses != NULL) | |
3186 | { | |
3187 | fprintf(stderr, " %s: %s\n", bad_addresses->text1, | |
3188 | bad_addresses->text2); | |
3189 | bad_addresses = bad_addresses->next; | |
3190 | } | |
3191 | } | |
3192 | } | |
3193 | ||
3194 | if (recipients_count == 0 || error_handling == ERRORS_STDERR) | |
3195 | { | |
3196 | Uunlink(spool_name); | |
f1e894f3 | 3197 | (void)fclose(data_file); |
059ec3d9 PH |
3198 | exim_exit(error_rc); |
3199 | } | |
3200 | } | |
3201 | ||
3202 | /* Data file successfully written. Generate text for the Received: header by | |
3203 | expanding the configured string, and adding a timestamp. By leaving this | |
3204 | operation till now, we ensure that the timestamp is the time that message | |
3205 | reception was completed. However, this is deliberately done before calling the | |
3206 | data ACL and local_scan(). | |
3207 | ||
3208 | This Received: header may therefore be inspected by the data ACL and by code in | |
3209 | the local_scan() function. When they have run, we update the timestamp to be | |
3210 | the final time of reception. | |
3211 | ||
3212 | If there is just one recipient, set up its value in the $received_for variable | |
3213 | for use when we generate the Received: header. | |
3214 | ||
3215 | Note: the checking for too many Received: headers is handled by the delivery | |
3216 | code. */ | |
e4bdf652 | 3217 | /*XXX eventually add excess Received: check for cutthrough case back when classifying them */ |
059ec3d9 | 3218 | |
e4bdf652 | 3219 | if (received_header->text == NULL) /* Non-cutthrough case */ |
059ec3d9 | 3220 | { |
e4bdf652 | 3221 | received_header_gen(); |
059ec3d9 | 3222 | |
e4bdf652 | 3223 | /* Set the value of message_body_size for the DATA ACL and for local_scan() */ |
059ec3d9 | 3224 | |
e4bdf652 JH |
3225 | message_body_size = (fstat(data_fd, &statbuf) == 0)? |
3226 | statbuf.st_size - SPOOL_DATA_START_OFFSET : -1; | |
059ec3d9 | 3227 | |
e4bdf652 JH |
3228 | /* If an ACL from any RCPT commands set up any warning headers to add, do so |
3229 | now, before running the DATA ACL. */ | |
059ec3d9 | 3230 | |
578d43dc | 3231 | add_acl_headers(ACL_WHERE_RCPT, US"MAIL or RCPT"); |
e4bdf652 | 3232 | } |
817d9f57 | 3233 | else |
e4bdf652 JH |
3234 | message_body_size = (fstat(data_fd, &statbuf) == 0)? |
3235 | statbuf.st_size - SPOOL_DATA_START_OFFSET : -1; | |
059ec3d9 PH |
3236 | |
3237 | /* If an ACL is specified for checking things at this stage of reception of a | |
3238 | message, run it, unless all the recipients were removed by "discard" in earlier | |
3239 | ACLs. That is the only case in which recipients_count can be zero at this | |
3240 | stage. Set deliver_datafile to point to the data file so that $message_body and | |
3241 | $message_body_end can be extracted if needed. Allow $recipients in expansions. | |
3242 | */ | |
3243 | ||
3244 | deliver_datafile = data_fd; | |
4e88a19f | 3245 | user_msg = NULL; |
059ec3d9 | 3246 | |
0e20aff9 MH |
3247 | enable_dollar_recipients = TRUE; |
3248 | ||
059ec3d9 | 3249 | if (recipients_count == 0) |
7e3ce68e JH |
3250 | blackholed_by = recipients_discarded ? US"MAIL ACL" : US"RCPT ACL"; |
3251 | ||
059ec3d9 PH |
3252 | else |
3253 | { | |
059ec3d9 PH |
3254 | /* Handle interactive SMTP messages */ |
3255 | ||
3256 | if (smtp_input && !smtp_batched_input) | |
3257 | { | |
8523533c | 3258 | |
80a47a2c TK |
3259 | #ifndef DISABLE_DKIM |
3260 | if (!dkim_disable_verify) | |
3261 | { | |
3262 | /* Finish verification, this will log individual signature results to | |
3263 | the mainlog */ | |
3264 | dkim_exim_verify_finish(); | |
3265 | ||
3266 | /* Check if we must run the DKIM ACL */ | |
7e3ce68e | 3267 | if (acl_smtp_dkim && dkim_verify_signers && *dkim_verify_signers) |
80a47a2c TK |
3268 | { |
3269 | uschar *dkim_verify_signers_expanded = | |
3270 | expand_string(dkim_verify_signers); | |
7e3ce68e | 3271 | if (!dkim_verify_signers_expanded) |
80a47a2c TK |
3272 | log_write(0, LOG_MAIN|LOG_PANIC, |
3273 | "expansion of dkim_verify_signers option failed: %s", | |
3274 | expand_string_message); | |
7e3ce68e | 3275 | |
80a47a2c TK |
3276 | else |
3277 | { | |
3278 | int sep = 0; | |
55414b25 | 3279 | const uschar *ptr = dkim_verify_signers_expanded; |
80a47a2c | 3280 | uschar *item = NULL; |
9e5d6b55 TK |
3281 | uschar *seen_items = NULL; |
3282 | int seen_items_size = 0; | |
3283 | int seen_items_offset = 0; | |
9122af94 TK |
3284 | /* Default to OK when no items are present */ |
3285 | rc = OK; | |
7e3ce68e | 3286 | while ((item = string_nextinlist(&ptr, &sep, NULL, 0))) |
80a47a2c | 3287 | { |
6119d1ea | 3288 | /* Prevent running ACL for an empty item */ |
7e3ce68e | 3289 | if (!item || !*item) continue; |
5032d1cf JH |
3290 | |
3291 | /* Only run ACL once for each domain or identity, | |
3292 | no matter how often it appears in the expanded list. */ | |
3293 | if (seen_items) | |
6119d1ea | 3294 | { |
ae9094bf | 3295 | uschar *seen_item = NULL; |
55414b25 | 3296 | const uschar *seen_items_list = seen_items; |
5032d1cf | 3297 | BOOL seen_this_item = FALSE; |
61147df4 | 3298 | |
ae9094bf | 3299 | while ((seen_item = string_nextinlist(&seen_items_list, &sep, |
7e3ce68e | 3300 | NULL, 0))) |
5032d1cf JH |
3301 | if (Ustrcmp(seen_item,item) == 0) |
3302 | { | |
3303 | seen_this_item = TRUE; | |
3304 | break; | |
3305 | } | |
3306 | ||
3307 | if (seen_this_item) | |
6119d1ea TK |
3308 | { |
3309 | DEBUG(D_receive) | |
5032d1cf JH |
3310 | debug_printf("acl_smtp_dkim: skipping signer %s, " |
3311 | "already seen\n", item); | |
6119d1ea TK |
3312 | continue; |
3313 | } | |
61147df4 | 3314 | |
5032d1cf JH |
3315 | seen_items = string_append(seen_items, &seen_items_size, |
3316 | &seen_items_offset, 1, ":"); | |
6119d1ea TK |
3317 | } |
3318 | ||
5032d1cf JH |
3319 | seen_items = string_append(seen_items, &seen_items_size, |
3320 | &seen_items_offset, 1, item); | |
4a73449b | 3321 | seen_items[seen_items_offset] = '\0'; |
6119d1ea TK |
3322 | |
3323 | DEBUG(D_receive) | |
5032d1cf JH |
3324 | debug_printf("calling acl_smtp_dkim for dkim_cur_signer=%s\n", |
3325 | item); | |
6119d1ea | 3326 | |
80a47a2c | 3327 | dkim_exim_acl_setup(item); |
5032d1cf JH |
3328 | rc = acl_check(ACL_WHERE_DKIM, NULL, acl_smtp_dkim, |
3329 | &user_msg, &log_msg); | |
6119d1ea TK |
3330 | |
3331 | if (rc != OK) | |
5032d1cf JH |
3332 | { |
3333 | DEBUG(D_receive) | |
3334 | debug_printf("acl_smtp_dkim: acl_check returned %d on %s, " | |
3335 | "skipping remaining items\n", rc, item); | |
3336 | cancel_cutthrough_connection("dkim acl not ok"); | |
3337 | break; | |
3338 | } | |
80a47a2c | 3339 | } |
578d43dc | 3340 | add_acl_headers(ACL_WHERE_DKIM, US"DKIM"); |
80a47a2c TK |
3341 | if (rc == DISCARD) |
3342 | { | |
3343 | recipients_count = 0; | |
3344 | blackholed_by = US"DKIM ACL"; | |
3345 | if (log_msg != NULL) | |
3346 | blackhole_log_msg = string_sprintf(": %s", log_msg); | |
3347 | } | |
3348 | else if (rc != OK) | |
3349 | { | |
3350 | Uunlink(spool_name); | |
3351 | if (smtp_handle_acl_fail(ACL_WHERE_DKIM, rc, user_msg, log_msg) != 0) | |
85ffcba6 | 3352 | smtp_yield = FALSE; /* No more messages after dropped connection */ |
80a47a2c TK |
3353 | smtp_reply = US""; /* Indicate reply already sent */ |
3354 | message_id[0] = 0; /* Indicate no message accepted */ | |
3355 | goto TIDYUP; /* Skip to end of function */ | |
3356 | } | |
3357 | } | |
3358 | } | |
3359 | } | |
4a8ce2d8 | 3360 | #endif /* DISABLE_DKIM */ |
fb2274d4 | 3361 | |
8523533c | 3362 | #ifdef WITH_CONTENT_SCAN |
80a47a2c TK |
3363 | if (recipients_count > 0 && |
3364 | acl_smtp_mime != NULL && | |
54cdb463 PH |
3365 | !run_mime_acl(acl_smtp_mime, &smtp_yield, &smtp_reply, &blackholed_by)) |
3366 | goto TIDYUP; | |
8523533c TK |
3367 | #endif /* WITH_CONTENT_SCAN */ |
3368 | ||
4840604e TL |
3369 | #ifdef EXPERIMENTAL_DMARC |
3370 | dmarc_up = dmarc_store_data(from_header); | |
3371 | #endif /* EXPERIMENTAL_DMARC */ | |
3372 | ||
8ccd00b1 JH |
3373 | #ifndef DISABLE_PRDR |
3374 | if (prdr_requested && recipients_count > 1 && acl_smtp_data_prdr) | |
fd98a5c6 JH |
3375 | { |
3376 | unsigned int c; | |
3377 | int all_pass = OK; | |
3378 | int all_fail = FAIL; | |
3379 | ||
3380 | smtp_printf("353 PRDR content analysis beginning\r\n"); | |
3381 | /* Loop through recipients, responses must be in same order received */ | |
3382 | for (c = 0; recipients_count > c; c++) | |
3383 | { | |
3384 | uschar * addr= recipients_list[c].address; | |
3385 | uschar * msg= US"PRDR R=<%s> %s"; | |
3386 | uschar * code; | |
3387 | DEBUG(D_receive) | |
3388 | debug_printf("PRDR processing recipient %s (%d of %d)\n", | |
3389 | addr, c+1, recipients_count); | |
3390 | rc = acl_check(ACL_WHERE_PRDR, addr, | |
3391 | acl_smtp_data_prdr, &user_msg, &log_msg); | |
3392 | ||
3393 | /* If any recipient rejected content, indicate it in final message */ | |
3394 | all_pass |= rc; | |
3395 | /* If all recipients rejected, indicate in final message */ | |
3396 | all_fail &= rc; | |
3397 | ||
3398 | switch (rc) | |
3399 | { | |
3400 | case OK: case DISCARD: code = US"250"; break; | |
3401 | case DEFER: code = US"450"; break; | |
3402 | default: code = US"550"; break; | |
3403 | } | |
3404 | if (user_msg != NULL) | |
3405 | smtp_user_msg(code, user_msg); | |
3406 | else | |
3407 | { | |
3408 | switch (rc) | |
3409 | { | |
3410 | case OK: case DISCARD: | |
3411 | msg = string_sprintf(CS msg, addr, "acceptance"); break; | |
3412 | case DEFER: | |
3413 | msg = string_sprintf(CS msg, addr, "temporary refusal"); break; | |
3414 | default: | |
3415 | msg = string_sprintf(CS msg, addr, "refusal"); break; | |
3416 | } | |
3417 | smtp_user_msg(code, msg); | |
3418 | } | |
3419 | if (log_msg) log_write(0, LOG_MAIN, "PRDR %s %s", addr, log_msg); | |
3420 | else if (user_msg) log_write(0, LOG_MAIN, "PRDR %s %s", addr, user_msg); | |
112b6a93 | 3421 | else log_write(0, LOG_MAIN, "%s", CS msg); |
fd98a5c6 JH |
3422 | |
3423 | if (rc != OK) { receive_remove_recipient(addr); c--; } | |
3424 | } | |
3425 | /* Set up final message, used if data acl gives OK */ | |
3426 | smtp_reply = string_sprintf("%s id=%s message %s", | |
3427 | all_fail == FAIL ? US"550" : US"250", | |
3428 | message_id, | |
3429 | all_fail == FAIL | |
3430 | ? US"rejected for all recipients" | |
3431 | : all_pass == OK | |
3432 | ? US"accepted" | |
3433 | : US"accepted for some recipients"); | |
3434 | if (recipients_count == 0) | |
3435 | { | |
3436 | message_id[0] = 0; /* Indicate no message accepted */ | |
3437 | goto TIDYUP; | |
3438 | } | |
3439 | } | |
3440 | else | |
3441 | prdr_requested = FALSE; | |
8ccd00b1 | 3442 | #endif /* !DISABLE_PRDR */ |
fd98a5c6 | 3443 | |
54cdb463 PH |
3444 | /* Check the recipients count again, as the MIME ACL might have changed |
3445 | them. */ | |
8523533c | 3446 | |
059ec3d9 PH |
3447 | if (acl_smtp_data != NULL && recipients_count > 0) |
3448 | { | |
059ec3d9 | 3449 | rc = acl_check(ACL_WHERE_DATA, NULL, acl_smtp_data, &user_msg, &log_msg); |
578d43dc | 3450 | add_acl_headers(ACL_WHERE_DATA, US"DATA"); |
059ec3d9 PH |
3451 | if (rc == DISCARD) |
3452 | { | |
3453 | recipients_count = 0; | |
3454 | blackholed_by = US"DATA ACL"; | |
8e669ac1 PH |
3455 | if (log_msg != NULL) |
3456 | blackhole_log_msg = string_sprintf(": %s", log_msg); | |
2e5b33cd | 3457 | cancel_cutthrough_connection("data acl discard"); |
059ec3d9 PH |
3458 | } |
3459 | else if (rc != OK) | |
3460 | { | |
3461 | Uunlink(spool_name); | |
2e5b33cd | 3462 | cancel_cutthrough_connection("data acl not ok"); |
8523533c TK |
3463 | #ifdef WITH_CONTENT_SCAN |
3464 | unspool_mbox(); | |
6f0c431a PP |
3465 | #endif |
3466 | #ifdef EXPERIMENTAL_DCC | |
3467 | dcc_ok = 0; | |
8523533c | 3468 | #endif |
059ec3d9 | 3469 | if (smtp_handle_acl_fail(ACL_WHERE_DATA, rc, user_msg, log_msg) != 0) |
85ffcba6 | 3470 | smtp_yield = FALSE; /* No more messages after dropped connection */ |
059ec3d9 PH |
3471 | smtp_reply = US""; /* Indicate reply already sent */ |
3472 | message_id[0] = 0; /* Indicate no message accepted */ | |
3473 | goto TIDYUP; /* Skip to end of function */ | |
3474 | } | |
3475 | } | |
3476 | } | |
3477 | ||
3478 | /* Handle non-SMTP and batch SMTP (i.e. non-interactive) messages. Note that | |
3479 | we cannot take different actions for permanent and temporary rejections. */ | |
3480 | ||
54cdb463 | 3481 | else |
059ec3d9 | 3482 | { |
54cdb463 PH |
3483 | |
3484 | #ifdef WITH_CONTENT_SCAN | |
3485 | if (acl_not_smtp_mime != NULL && | |
3486 | !run_mime_acl(acl_not_smtp_mime, &smtp_yield, &smtp_reply, | |
3487 | &blackholed_by)) | |
3488 | goto TIDYUP; | |
3489 | #endif /* WITH_CONTENT_SCAN */ | |
3490 | ||
3491 | if (acl_not_smtp != NULL) | |
059ec3d9 | 3492 | { |
54cdb463 PH |
3493 | uschar *user_msg, *log_msg; |
3494 | rc = acl_check(ACL_WHERE_NOTSMTP, NULL, acl_not_smtp, &user_msg, &log_msg); | |
3495 | if (rc == DISCARD) | |
059ec3d9 | 3496 | { |
54cdb463 PH |
3497 | recipients_count = 0; |
3498 | blackholed_by = US"non-SMTP ACL"; | |
3499 | if (log_msg != NULL) | |
3500 | blackhole_log_msg = string_sprintf(": %s", log_msg); | |
059ec3d9 | 3501 | } |
54cdb463 | 3502 | else if (rc != OK) |
059ec3d9 | 3503 | { |
54cdb463 PH |
3504 | Uunlink(spool_name); |
3505 | #ifdef WITH_CONTENT_SCAN | |
3506 | unspool_mbox(); | |
6f0c431a PP |
3507 | #endif |
3508 | #ifdef EXPERIMENTAL_DCC | |
3509 | dcc_ok = 0; | |
54cdb463 | 3510 | #endif |
6ea85e9a PH |
3511 | /* The ACL can specify where rejections are to be logged, possibly |
3512 | nowhere. The default is main and reject logs. */ | |
3513 | ||
3514 | if (log_reject_target != 0) | |
3515 | log_write(0, log_reject_target, "F=<%s> rejected by non-SMTP ACL: %s", | |
3516 | sender_address, log_msg); | |
3517 | ||
54cdb463 PH |
3518 | if (user_msg == NULL) user_msg = US"local configuration problem"; |
3519 | if (smtp_batched_input) | |
3520 | { | |
3521 | moan_smtp_batch(NULL, "%d %s", 550, user_msg); | |
3522 | /* Does not return */ | |
3523 | } | |
3524 | else | |
3525 | { | |
3526 | fseek(data_file, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3527 | give_local_error(ERRMESS_LOCAL_ACL, user_msg, | |
3528 | US"message rejected by non-SMTP ACL: ", error_rc, data_file, | |
3529 | header_list); | |
3530 | /* Does not return */ | |
3531 | } | |
059ec3d9 | 3532 | } |
578d43dc | 3533 | add_acl_headers(ACL_WHERE_NOTSMTP, US"non-SMTP"); |
059ec3d9 | 3534 | } |
059ec3d9 PH |
3535 | } |
3536 | ||
54cdb463 PH |
3537 | /* The applicable ACLs have been run */ |
3538 | ||
059ec3d9 PH |
3539 | if (deliver_freeze) frozen_by = US"ACL"; /* for later logging */ |
3540 | if (queue_only_policy) queued_by = US"ACL"; | |
059ec3d9 PH |
3541 | } |
3542 | ||
8523533c TK |
3543 | #ifdef WITH_CONTENT_SCAN |
3544 | unspool_mbox(); | |
3545 | #endif | |
3546 | ||
6a8f9482 TK |
3547 | #ifdef EXPERIMENTAL_DCC |
3548 | dcc_ok = 0; | |
3549 | #endif | |
3550 | ||
3551 | ||
059ec3d9 PH |
3552 | /* The final check on the message is to run the scan_local() function. The |
3553 | version supplied with Exim always accepts, but this is a hook for sysadmins to | |
3554 | supply their own checking code. The local_scan() function is run even when all | |
3555 | the recipients have been discarded. */ | |
3556 | ||
3557 | lseek(data_fd, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3558 | ||
3559 | /* Arrange to catch crashes in local_scan(), so that the -D file gets | |
3560 | deleted, and the incident gets logged. */ | |
3561 | ||
3562 | os_non_restarting_signal(SIGSEGV, local_scan_crash_handler); | |
3563 | os_non_restarting_signal(SIGFPE, local_scan_crash_handler); | |
3564 | os_non_restarting_signal(SIGILL, local_scan_crash_handler); | |
3565 | os_non_restarting_signal(SIGBUS, local_scan_crash_handler); | |
3566 | ||
3567 | DEBUG(D_receive) debug_printf("calling local_scan(); timeout=%d\n", | |
3568 | local_scan_timeout); | |
3569 | local_scan_data = NULL; | |
3570 | ||
3571 | os_non_restarting_signal(SIGALRM, local_scan_timeout_handler); | |
3572 | if (local_scan_timeout > 0) alarm(local_scan_timeout); | |
3573 | rc = local_scan(data_fd, &local_scan_data); | |
3574 | alarm(0); | |
3575 | os_non_restarting_signal(SIGALRM, sigalrm_handler); | |
3576 | ||
0e20aff9 MH |
3577 | enable_dollar_recipients = FALSE; |
3578 | ||
059ec3d9 PH |
3579 | store_pool = POOL_MAIN; /* In case changed */ |
3580 | DEBUG(D_receive) debug_printf("local_scan() returned %d %s\n", rc, | |
3581 | local_scan_data); | |
3582 | ||
3583 | os_non_restarting_signal(SIGSEGV, SIG_DFL); | |
3584 | os_non_restarting_signal(SIGFPE, SIG_DFL); | |
3585 | os_non_restarting_signal(SIGILL, SIG_DFL); | |
3586 | os_non_restarting_signal(SIGBUS, SIG_DFL); | |
3587 | ||
3588 | /* The length check is paranoia against some runaway code, and also because | |
3589 | (for a success return) lines in the spool file are read into big_buffer. */ | |
3590 | ||
3591 | if (local_scan_data != NULL) | |
3592 | { | |
3593 | int len = Ustrlen(local_scan_data); | |
3594 | if (len > LOCAL_SCAN_MAX_RETURN) len = LOCAL_SCAN_MAX_RETURN; | |
3595 | local_scan_data = string_copyn(local_scan_data, len); | |
3596 | } | |
3597 | ||
3598 | if (rc == LOCAL_SCAN_ACCEPT_FREEZE) | |
3599 | { | |
58eb016e | 3600 | if (!deliver_freeze) /* ACL might have already frozen */ |
059ec3d9 PH |
3601 | { |
3602 | deliver_freeze = TRUE; | |
3603 | deliver_frozen_at = time(NULL); | |
3604 | frozen_by = US"local_scan()"; | |
3605 | } | |
3606 | rc = LOCAL_SCAN_ACCEPT; | |
3607 | } | |
3608 | else if (rc == LOCAL_SCAN_ACCEPT_QUEUE) | |
3609 | { | |
3610 | if (!queue_only_policy) /* ACL might have already queued */ | |
3611 | { | |
3612 | queue_only_policy = TRUE; | |
3613 | queued_by = US"local_scan()"; | |
3614 | } | |
3615 | rc = LOCAL_SCAN_ACCEPT; | |
3616 | } | |
3617 | ||
3618 | /* Message accepted: remove newlines in local_scan_data because otherwise | |
3619 | the spool file gets corrupted. Ensure that all recipients are qualified. */ | |
3620 | ||
3621 | if (rc == LOCAL_SCAN_ACCEPT) | |
3622 | { | |
3623 | if (local_scan_data != NULL) | |
3624 | { | |
3625 | uschar *s; | |
3626 | for (s = local_scan_data; *s != 0; s++) if (*s == '\n') *s = ' '; | |
3627 | } | |
3628 | for (i = 0; i < recipients_count; i++) | |
3629 | { | |
3630 | recipient_item *r = recipients_list + i; | |
3631 | r->address = rewrite_address_qualify(r->address, TRUE); | |
3632 | if (r->errors_to != NULL) | |
3633 | r->errors_to = rewrite_address_qualify(r->errors_to, TRUE); | |
3634 | } | |
3635 | if (recipients_count == 0 && blackholed_by == NULL) | |
3636 | blackholed_by = US"local_scan"; | |
3637 | } | |
3638 | ||
3639 | /* Message rejected: newlines permitted in local_scan_data to generate | |
3640 | multiline SMTP responses. */ | |
3641 | ||
3642 | else | |
3643 | { | |
3644 | uschar *istemp = US""; | |
3645 | uschar *s = NULL; | |
a5bd321b | 3646 | uschar *smtp_code; |
059ec3d9 PH |
3647 | int size = 0; |
3648 | int sptr = 0; | |
059ec3d9 PH |
3649 | |
3650 | errmsg = local_scan_data; | |
3651 | ||
3652 | Uunlink(spool_name); /* Cancel this message */ | |
3653 | switch(rc) | |
3654 | { | |
3655 | default: | |
3656 | log_write(0, LOG_MAIN, "invalid return %d from local_scan(). Temporary " | |
3657 | "rejection given", rc); | |
3658 | goto TEMPREJECT; | |
3659 | ||
3660 | case LOCAL_SCAN_REJECT_NOLOGHDR: | |
6c6d6e48 | 3661 | BIT_CLEAR(log_selector, log_selector_size, Li_rejected_header); |
059ec3d9 PH |
3662 | /* Fall through */ |
3663 | ||
3664 | case LOCAL_SCAN_REJECT: | |
a5bd321b | 3665 | smtp_code = US"550"; |
059ec3d9 PH |
3666 | if (errmsg == NULL) errmsg = US"Administrative prohibition"; |
3667 | break; | |
3668 | ||
3669 | case LOCAL_SCAN_TEMPREJECT_NOLOGHDR: | |
6c6d6e48 | 3670 | BIT_CLEAR(log_selector, log_selector_size, Li_rejected_header); |
059ec3d9 PH |
3671 | /* Fall through */ |
3672 | ||
3673 | case LOCAL_SCAN_TEMPREJECT: | |
3674 | TEMPREJECT: | |
a5bd321b | 3675 | smtp_code = US"451"; |
059ec3d9 PH |
3676 | if (errmsg == NULL) errmsg = US"Temporary local problem"; |
3677 | istemp = US"temporarily "; | |
3678 | break; | |
3679 | } | |
3680 | ||
3681 | s = string_append(s, &size, &sptr, 2, US"F=", | |
3682 | (sender_address[0] == 0)? US"<>" : sender_address); | |
3683 | s = add_host_info_for_log(s, &size, &sptr); | |
3684 | s[sptr] = 0; | |
3685 | ||
3686 | log_write(0, LOG_MAIN|LOG_REJECT, "%s %srejected by local_scan(): %.256s", | |
3687 | s, istemp, string_printing(errmsg)); | |
3688 | ||
3689 | if (smtp_input) | |
3690 | { | |
3691 | if (!smtp_batched_input) | |
3692 | { | |
a5bd321b | 3693 | smtp_respond(smtp_code, 3, TRUE, errmsg); |
059ec3d9 PH |
3694 | message_id[0] = 0; /* Indicate no message accepted */ |
3695 | smtp_reply = US""; /* Indicate reply already sent */ | |
3696 | goto TIDYUP; /* Skip to end of function */ | |
3697 | } | |
3698 | else | |
3699 | { | |
a5bd321b | 3700 | moan_smtp_batch(NULL, "%s %s", smtp_code, errmsg); |
059ec3d9 PH |
3701 | /* Does not return */ |
3702 | } | |
3703 | } | |
3704 | else | |
3705 | { | |
3706 | fseek(data_file, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3707 | give_local_error(ERRMESS_LOCAL_SCAN, errmsg, | |
3708 | US"message rejected by local scan code: ", error_rc, data_file, | |
3709 | header_list); | |
3710 | /* Does not return */ | |
3711 | } | |
3712 | } | |
3713 | ||
3714 | /* Reset signal handlers to ignore signals that previously would have caused | |
3715 | the message to be abandoned. */ | |
3716 | ||
3717 | signal(SIGTERM, SIG_IGN); | |
3718 | signal(SIGINT, SIG_IGN); | |
3719 | ||
e4bdf652 | 3720 | |
059ec3d9 PH |
3721 | /* Ensure the first time flag is set in the newly-received message. */ |
3722 | ||
3723 | deliver_firsttime = TRUE; | |
3724 | ||
8523533c | 3725 | #ifdef EXPERIMENTAL_BRIGHTMAIL |
a2da3176 JH |
3726 | if (bmi_run == 1) |
3727 | { /* rewind data file */ | |
8523533c TK |
3728 | lseek(data_fd, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); |
3729 | bmi_verdicts = bmi_process_message(header_list, data_fd); | |
a2da3176 | 3730 | } |
8523533c TK |
3731 | #endif |
3732 | ||
059ec3d9 PH |
3733 | /* Update the timstamp in our Received: header to account for any time taken by |
3734 | an ACL or by local_scan(). The new time is the time that all reception | |
3735 | processing is complete. */ | |
3736 | ||
3737 | timestamp = expand_string(US"${tod_full}"); | |
3738 | tslen = Ustrlen(timestamp); | |
3739 | ||
3740 | memcpy(received_header->text + received_header->slen - tslen - 1, | |
3741 | timestamp, tslen); | |
3742 | ||
3743 | /* In MUA wrapper mode, ignore queueing actions set by ACL or local_scan() */ | |
3744 | ||
3745 | if (mua_wrapper) | |
3746 | { | |
3747 | deliver_freeze = FALSE; | |
3748 | queue_only_policy = FALSE; | |
3749 | } | |
3750 | ||
3751 | /* Keep the data file open until we have written the header file, in order to | |
3752 | hold onto the lock. In a -bh run, or if the message is to be blackholed, we | |
3753 | don't write the header file, and we unlink the data file. If writing the header | |
3754 | file fails, we have failed to accept this message. */ | |
3755 | ||
3756 | if (host_checking || blackholed_by != NULL) | |
3757 | { | |
3758 | header_line *h; | |
3759 | Uunlink(spool_name); | |
3760 | msg_size = 0; /* Compute size for log line */ | |
3761 | for (h = header_list; h != NULL; h = h->next) | |
3762 | if (h->type != '*') msg_size += h->slen; | |
3763 | } | |
3764 | ||
3765 | /* Write the -H file */ | |
3766 | ||
3767 | else | |
059ec3d9 PH |
3768 | if ((msg_size = spool_write_header(message_id, SW_RECEIVING, &errmsg)) < 0) |
3769 | { | |
3770 | log_write(0, LOG_MAIN, "Message abandoned: %s", errmsg); | |
3771 | Uunlink(spool_name); /* Lose the data file */ | |
3772 | ||
3773 | if (smtp_input) | |
3774 | { | |
3775 | smtp_reply = US"451 Error in writing spool file"; | |
3776 | message_id[0] = 0; /* Indicate no message accepted */ | |
3777 | goto TIDYUP; | |
3778 | } | |
3779 | else | |
3780 | { | |
3781 | fseek(data_file, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3782 | give_local_error(ERRMESS_IOERR, errmsg, US"", error_rc, data_file, | |
3783 | header_list); | |
3784 | /* Does not return */ | |
3785 | } | |
3786 | } | |
059ec3d9 PH |
3787 | |
3788 | ||
3789 | /* The message has now been successfully received. */ | |
3790 | ||
3791 | receive_messagecount++; | |
3792 | ||
3793 | /* In SMTP sessions we may receive several in one connection. After each one, | |
3794 | we wait for the clock to tick at the level of message-id granularity. This is | |
3795 | so that the combination of time+pid is unique, even on systems where the pid | |
3796 | can be re-used within our time interval. We can't shorten the interval without | |
3797 | re-designing the message-id. See comments above where the message id is | |
3798 | created. This is Something For The Future. */ | |
3799 | ||
3800 | message_id_tv.tv_usec = (message_id_tv.tv_usec/id_resolution) * id_resolution; | |
3801 | exim_wait_tick(&message_id_tv, id_resolution); | |
3802 | ||
3803 | /* Add data size to written header size. We do not count the initial file name | |
3804 | that is in the file, but we do add one extra for the notional blank line that | |
3805 | precedes the data. This total differs from message_size in that it include the | |
3806 | added Received: header and any other headers that got created locally. */ | |
3807 | ||
3808 | fflush(data_file); | |
3809 | fstat(data_fd, &statbuf); | |
3810 | ||
3811 | msg_size += statbuf.st_size - SPOOL_DATA_START_OFFSET + 1; | |
3812 | ||
3813 | /* Generate a "message received" log entry. We do this by building up a dynamic | |
3814 | string as required. Since we commonly want to add two items at a time, use a | |
3815 | macro to simplify the coding. We log the arrival of a new message while the | |
3816 | file is still locked, just in case the machine is *really* fast, and delivers | |
3817 | it first! Include any message id that is in the message - since the syntax of a | |
3818 | message id is actually an addr-spec, we can use the parse routine to canonicize | |
3819 | it. */ | |
3820 | ||
3821 | size = 256; | |
3822 | sptr = 0; | |
3823 | s = store_get(size); | |
3824 | ||
27b9e5f4 JH |
3825 | s = string_append(s, &size, &sptr, 2, |
3826 | fake_response == FAIL ? US"(= " : US"<= ", | |
3827 | sender_address[0] == 0 ? US"<>" : sender_address); | |
3828 | if (message_reference) | |
059ec3d9 PH |
3829 | s = string_append(s, &size, &sptr, 2, US" R=", message_reference); |
3830 | ||
3831 | s = add_host_info_for_log(s, &size, &sptr); | |
3832 | ||
3833 | #ifdef SUPPORT_TLS | |
6c6d6e48 | 3834 | if (LOGGING(tls_cipher) && tls_in.cipher) |
817d9f57 | 3835 | s = string_append(s, &size, &sptr, 2, US" X=", tls_in.cipher); |
6c6d6e48 | 3836 | if (LOGGING(tls_certificate_verified) && tls_in.cipher) |
059ec3d9 | 3837 | s = string_append(s, &size, &sptr, 2, US" CV=", |
27b9e5f4 | 3838 | tls_in.certificate_verified ? "yes":"no"); |
6c6d6e48 | 3839 | if (LOGGING(tls_peerdn) && tls_in.peerdn) |
48ed62d9 | 3840 | s = string_append(s, &size, &sptr, 3, US" DN=\"", |
817d9f57 | 3841 | string_printing(tls_in.peerdn), US"\""); |
6c6d6e48 | 3842 | if (LOGGING(tls_sni) && tls_in.sni) |
3f0945ff | 3843 | s = string_append(s, &size, &sptr, 3, US" SNI=\"", |
817d9f57 | 3844 | string_printing(tls_in.sni), US"\""); |
3f0945ff | 3845 | #endif |
059ec3d9 | 3846 | |
8ccd00b1 | 3847 | if (sender_host_authenticated) |
059ec3d9 PH |
3848 | { |
3849 | s = string_append(s, &size, &sptr, 2, US" A=", sender_host_authenticated); | |
27b9e5f4 | 3850 | if (authenticated_id) |
c8e2fc1e | 3851 | { |
059ec3d9 | 3852 | s = string_append(s, &size, &sptr, 2, US":", authenticated_id); |
27b9e5f4 | 3853 | if (LOGGING(smtp_mailauth) && authenticated_sender) |
c8e2fc1e JH |
3854 | s = string_append(s, &size, &sptr, 2, US":", authenticated_sender); |
3855 | } | |
059ec3d9 PH |
3856 | } |
3857 | ||
8ccd00b1 | 3858 | #ifndef DISABLE_PRDR |
fd98a5c6 | 3859 | if (prdr_requested) |
7e3ce68e | 3860 | s = string_catn(s, &size, &sptr, US" PRDR", 5); |
fd98a5c6 | 3861 | #endif |
8ccd00b1 | 3862 | |
cee5f132 | 3863 | #ifdef SUPPORT_PROXY |
6c6d6e48 | 3864 | if (proxy_session && LOGGING(proxy)) |
e6d2a989 | 3865 | s = string_append(s, &size, &sptr, 2, US" PRX=", proxy_local_address); |
a3c86431 | 3866 | #endif |
fd98a5c6 | 3867 | |
7e3ce68e JH |
3868 | if (chunking_state > CHUNKING_OFFERED) |
3869 | s = string_catn(s, &size, &sptr, US" K", 2); | |
3870 | ||
059ec3d9 PH |
3871 | sprintf(CS big_buffer, "%d", msg_size); |
3872 | s = string_append(s, &size, &sptr, 2, US" S=", big_buffer); | |
3873 | ||
3c0a92dc JH |
3874 | /* log 8BITMIME mode announced in MAIL_FROM |
3875 | 0 ... no BODY= used | |
3876 | 7 ... 7BIT | |
3877 | 8 ... 8BITMIME */ | |
6c6d6e48 | 3878 | if (LOGGING(8bitmime)) |
c8e2fc1e | 3879 | { |
3c0a92dc JH |
3880 | sprintf(CS big_buffer, "%d", body_8bitmime); |
3881 | s = string_append(s, &size, &sptr, 2, US" M8S=", big_buffer); | |
c8e2fc1e | 3882 | } |
3c0a92dc | 3883 | |
afa6d3ad JH |
3884 | if (*queue_name) |
3885 | s = string_append(s, &size, &sptr, 2, US" Q=", queue_name); | |
3886 | ||
059ec3d9 PH |
3887 | /* If an addr-spec in a message-id contains a quoted string, it can contain |
3888 | any characters except " \ and CR and so in particular it can contain NL! | |
3889 | Therefore, make sure we use a printing-characters only version for the log. | |
3890 | Also, allow for domain literals in the message id. */ | |
3891 | ||
27b9e5f4 | 3892 | if (msgid_header) |
059ec3d9 PH |
3893 | { |
3894 | uschar *old_id; | |
3895 | BOOL save_allow_domain_literals = allow_domain_literals; | |
3896 | allow_domain_literals = TRUE; | |
3897 | old_id = parse_extract_address(Ustrchr(msgid_header->text, ':') + 1, | |
3898 | &errmsg, &start, &end, &domain, FALSE); | |
3899 | allow_domain_literals = save_allow_domain_literals; | |
3900 | if (old_id != NULL) | |
3901 | s = string_append(s, &size, &sptr, 2, US" id=", string_printing(old_id)); | |
3902 | } | |
3903 | ||
3904 | /* If subject logging is turned on, create suitable printing-character | |
3905 | text. By expanding $h_subject: we make use of the MIME decoding. */ | |
3906 | ||
6c6d6e48 | 3907 | if (LOGGING(subject) && subject_header != NULL) |
059ec3d9 PH |
3908 | { |
3909 | int i; | |
3910 | uschar *p = big_buffer; | |
3911 | uschar *ss = expand_string(US"$h_subject:"); | |
3912 | ||
3913 | /* Backslash-quote any double quotes or backslashes so as to make a | |
3914 | a C-like string, and turn any non-printers into escape sequences. */ | |
3915 | ||
3916 | *p++ = '\"'; | |
3917 | if (*ss != 0) for (i = 0; i < 100 && ss[i] != 0; i++) | |
3918 | { | |
3919 | if (ss[i] == '\"' || ss[i] == '\\') *p++ = '\\'; | |
3920 | *p++ = ss[i]; | |
3921 | } | |
3922 | *p++ = '\"'; | |
3923 | *p = 0; | |
3924 | s = string_append(s, &size, &sptr, 2, US" T=", string_printing(big_buffer)); | |
3925 | } | |
3926 | ||
3927 | /* Terminate the string: string_cat() and string_append() leave room, but do | |
3928 | not put the zero in. */ | |
3929 | ||
3930 | s[sptr] = 0; | |
3931 | ||
059ec3d9 PH |
3932 | /* Create a message log file if message logs are being used and this message is |
3933 | not blackholed. Write the reception stuff to it. We used to leave message log | |
e4bdf652 | 3934 | creation until the first delivery, but this has proved confusing for some |
059ec3d9 PH |
3935 | people. */ |
3936 | ||
3937 | if (message_logs && blackholed_by == NULL) | |
3938 | { | |
3939 | int fd; | |
3940 | ||
41313d92 | 3941 | spool_name = spool_fname(US"msglog", message_subdir, message_id, US""); |
a2da3176 JH |
3942 | |
3943 | if ( (fd = Uopen(spool_name, O_WRONLY|O_APPEND|O_CREAT, SPOOL_MODE)) < 0 | |
3944 | && errno == ENOENT | |
3945 | ) | |
059ec3d9 | 3946 | { |
41313d92 JH |
3947 | (void)directory_make(spool_directory, |
3948 | spool_sname(US"msglog", message_subdir), | |
3949 | MSGLOG_DIRECTORY_MODE, TRUE); | |
059ec3d9 PH |
3950 | fd = Uopen(spool_name, O_WRONLY|O_APPEND|O_CREAT, SPOOL_MODE); |
3951 | } | |
3952 | ||
3953 | if (fd < 0) | |
3954 | { | |
3955 | log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't open message log %s: %s", | |
3956 | spool_name, strerror(errno)); | |
3957 | } | |
3958 | ||
3959 | else | |
3960 | { | |
3961 | FILE *message_log = fdopen(fd, "a"); | |
3962 | if (message_log == NULL) | |
3963 | { | |
3964 | log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't fdopen message log %s: %s", | |
3965 | spool_name, strerror(errno)); | |
f1e894f3 | 3966 | (void)close(fd); |
059ec3d9 PH |
3967 | } |
3968 | else | |
3969 | { | |
3970 | uschar *now = tod_stamp(tod_log); | |
3971 | fprintf(message_log, "%s Received from %s\n", now, s+3); | |
3972 | if (deliver_freeze) fprintf(message_log, "%s frozen by %s\n", now, | |
3973 | frozen_by); | |
3974 | if (queue_only_policy) fprintf(message_log, | |
e8012beb JH |
3975 | "%s no immediate delivery: queued%s%s by %s\n", now, |
3976 | *queue_name ? " in " : "", *queue_name ? CS queue_name : "", | |
3977 | queued_by); | |
f1e894f3 | 3978 | (void)fclose(message_log); |
059ec3d9 PH |
3979 | } |
3980 | } | |
3981 | } | |
3982 | ||
58eb016e PH |
3983 | /* Everything has now been done for a successful message except logging its |
3984 | arrival, and outputting an SMTP response. While writing to the log, set a flag | |
3985 | to cause a call to receive_bomb_out() if the log cannot be opened. */ | |
3986 | ||
3987 | receive_call_bombout = TRUE; | |
3988 | ||
563b63fa PH |
3989 | /* Before sending an SMTP response in a TCP/IP session, we check to see if the |
3990 | connection has gone away. This can only be done if there is no unconsumed input | |
3991 | waiting in the local input buffer. We can test for this by calling | |
3992 | receive_smtp_buffered(). RFC 2920 (pipelining) explicitly allows for additional | |
3993 | input to be sent following the final dot, so the presence of following input is | |
3994 | not an error. | |
58eb016e | 3995 | |
563b63fa PH |
3996 | If the connection is still present, but there is no unread input for the |
3997 | socket, the result of a select() call will be zero. If, however, the connection | |
3998 | has gone away, or if there is pending input, the result of select() will be | |
3999 | non-zero. The two cases can be distinguished by trying to read the next input | |
4000 | character. If we succeed, we can unread it so that it remains in the local | |
4001 | buffer for handling later. If not, the connection has been lost. | |
58eb016e | 4002 | |
563b63fa PH |
4003 | Of course, since TCP/IP is asynchronous, there is always a chance that the |
4004 | connection will vanish between the time of this test and the sending of the | |
4005 | response, but the chance of this happening should be small. */ | |
4006 | ||
4007 | if (smtp_input && sender_host_address != NULL && !sender_host_notsocket && | |
4008 | !receive_smtp_buffered()) | |
58eb016e PH |
4009 | { |
4010 | struct timeval tv; | |
4011 | fd_set select_check; | |
4012 | FD_ZERO(&select_check); | |
4013 | FD_SET(fileno(smtp_in), &select_check); | |
4014 | tv.tv_sec = 0; | |
4015 | tv.tv_usec = 0; | |
4016 | ||
563b63fa | 4017 | if (select(fileno(smtp_in) + 1, &select_check, NULL, NULL, &tv) != 0) |
58eb016e | 4018 | { |
80a47a2c TK |
4019 | int c = (receive_getc)(); |
4020 | if (c != EOF) (receive_ungetc)(c); else | |
58eb016e | 4021 | { |
563b63fa PH |
4022 | uschar *msg = US"SMTP connection lost after final dot"; |
4023 | smtp_reply = US""; /* No attempt to send a response */ | |
4024 | smtp_yield = FALSE; /* Nothing more on this connection */ | |
58eb016e | 4025 | |
563b63fa | 4026 | /* Re-use the log line workspace */ |
58eb016e | 4027 | |
563b63fa | 4028 | sptr = 0; |
c2f669a4 | 4029 | s = string_cat(s, &size, &sptr, msg); |
563b63fa PH |
4030 | s = add_host_info_for_log(s, &size, &sptr); |
4031 | s[sptr] = 0; | |
4032 | log_write(0, LOG_MAIN, "%s", s); | |
58eb016e | 4033 | |
563b63fa | 4034 | /* Delete the files for this aborted message. */ |
58eb016e | 4035 | |
41313d92 JH |
4036 | Uunlink(spool_fname(US"input", message_subdir, message_id, US"-D")); |
4037 | Uunlink(spool_fname(US"input", message_subdir, message_id, US"-H")); | |
4038 | Uunlink(spool_fname(US"msglog", message_subdir, message_id, US"")); | |
58eb016e | 4039 | |
563b63fa PH |
4040 | goto TIDYUP; |
4041 | } | |
58eb016e PH |
4042 | } |
4043 | } | |
4044 | ||
4045 | /* The connection has not gone away; we really are going to take responsibility | |
4046 | for this message. */ | |
4047 | ||
817d9f57 | 4048 | /* Cutthrough - had sender last-dot; assume we've sent (or bufferred) all |
e4bdf652 JH |
4049 | data onward by now. |
4050 | ||
817d9f57 | 4051 | Send dot onward. If accepted, wipe the spooled files, log as delivered and accept |
e4bdf652 | 4052 | the sender's dot (below). |
817d9f57 JH |
4053 | If rejected: copy response to sender, wipe the spooled files, log approriately. |
4054 | If temp-reject: accept to sender, keep the spooled files. | |
e4bdf652 JH |
4055 | |
4056 | Having the normal spool files lets us do data-filtering, and store/forward on temp-reject. | |
817d9f57 JH |
4057 | |
4058 | XXX We do not handle queue-only, freezing, or blackholes. | |
e4bdf652 | 4059 | */ |
5032d1cf | 4060 | if(cutthrough.fd >= 0) |
e4bdf652 | 4061 | { |
85ffcba6 | 4062 | uschar * msg= cutthrough_finaldot(); /* Ask the target system to accept the message */ |
817d9f57 | 4063 | /* Logging was done in finaldot() */ |
e4bdf652 | 4064 | switch(msg[0]) |
817d9f57 JH |
4065 | { |
4066 | case '2': /* Accept. Do the same to the source; dump any spoolfiles. */ | |
b784ce7f | 4067 | cutthrough_done = ACCEPTED; |
817d9f57 | 4068 | break; /* message_id needed for SMTP accept below */ |
61147df4 | 4069 | |
817d9f57 JH |
4070 | default: /* Unknown response, or error. Treat as temp-reject. */ |
4071 | case '4': /* Temp-reject. Keep spoolfiles and accept. */ | |
b784ce7f | 4072 | cutthrough_done = TMP_REJ; /* Avoid the usual immediate delivery attempt */ |
817d9f57 | 4073 | break; /* message_id needed for SMTP accept below */ |
61147df4 | 4074 | |
817d9f57 JH |
4075 | case '5': /* Perm-reject. Do the same to the source. Dump any spoolfiles */ |
4076 | smtp_reply= msg; /* Pass on the exact error */ | |
b784ce7f | 4077 | cutthrough_done = PERM_REJ; |
817d9f57 JH |
4078 | break; |
4079 | } | |
e4bdf652 | 4080 | } |
58eb016e | 4081 | |
8ccd00b1 JH |
4082 | #ifndef DISABLE_PRDR |
4083 | if(!smtp_reply || prdr_requested) | |
4084 | #else | |
4085 | if(!smtp_reply) | |
fd98a5c6 | 4086 | #endif |
e4bdf652 JH |
4087 | { |
4088 | log_write(0, LOG_MAIN | | |
6c6d6e48 TF |
4089 | (LOGGING(received_recipients)? LOG_RECIPIENTS : 0) | |
4090 | (LOGGING(received_sender)? LOG_SENDER : 0), | |
e4bdf652 JH |
4091 | "%s", s); |
4092 | ||
4093 | /* Log any control actions taken by an ACL or local_scan(). */ | |
58eb016e | 4094 | |
e4bdf652 JH |
4095 | if (deliver_freeze) log_write(0, LOG_MAIN, "frozen by %s", frozen_by); |
4096 | if (queue_only_policy) log_write(L_delay_delivery, LOG_MAIN, | |
e8012beb JH |
4097 | "no immediate delivery: queued%s%s by %s", |
4098 | *queue_name ? " in " : "", *queue_name ? CS queue_name : "", | |
4099 | queued_by); | |
e4bdf652 JH |
4100 | } |
4101 | receive_call_bombout = FALSE; | |
58eb016e | 4102 | |
059ec3d9 PH |
4103 | store_reset(s); /* The store for the main log message can be reused */ |
4104 | ||
4105 | /* If the message is frozen, and freeze_tell is set, do the telling. */ | |
4106 | ||
4107 | if (deliver_freeze && freeze_tell != NULL && freeze_tell[0] != 0) | |
4108 | { | |
4109 | moan_tell_someone(freeze_tell, NULL, US"Message frozen on arrival", | |
4110 | "Message %s was frozen on arrival by %s.\nThe sender is <%s>.\n", | |
4111 | message_id, frozen_by, sender_address); | |
4112 | } | |
4113 | ||
4114 | ||
4115 | /* Either a message has been successfully received and written to the two spool | |
4116 | files, or an error in writing the spool has occurred for an SMTP message, or | |
58eb016e PH |
4117 | an SMTP message has been rejected for policy reasons. (For a non-SMTP message |
4118 | we will have already given up because there's no point in carrying on!) In | |
4119 | either event, we must now close (and thereby unlock) the data file. In the | |
059ec3d9 PH |
4120 | successful case, this leaves the message on the spool, ready for delivery. In |
4121 | the error case, the spool file will be deleted. Then tidy up store, interact | |
4122 | with an SMTP call if necessary, and return. | |
4123 | ||
4124 | A fflush() was done earlier in the expectation that any write errors on the | |
4125 | data file will be flushed(!) out thereby. Nevertheless, it is theoretically | |
4126 | possible for fclose() to fail - but what to do? What has happened to the lock | |
4127 | if this happens? */ | |
4128 | ||
e4bdf652 | 4129 | |
059ec3d9 | 4130 | TIDYUP: |
f1e894f3 PH |
4131 | process_info[process_info_len] = 0; /* Remove message id */ |
4132 | if (data_file != NULL) (void)fclose(data_file); /* Frees the lock */ | |
059ec3d9 PH |
4133 | |
4134 | /* Now reset signal handlers to their defaults */ | |
4135 | ||
4136 | signal(SIGTERM, SIG_DFL); | |
4137 | signal(SIGINT, SIG_DFL); | |
4138 | ||
4139 | /* Tell an SMTP caller the state of play, and arrange to return the SMTP return | |
4140 | value, which defaults TRUE - meaning there may be more incoming messages from | |
4141 | this connection. For non-SMTP callers (where there is only ever one message), | |
4142 | the default is FALSE. */ | |
4143 | ||
4144 | if (smtp_input) | |
4145 | { | |
4146 | yield = smtp_yield; | |
4147 | ||
4148 | /* Handle interactive SMTP callers. After several kinds of error, smtp_reply | |
58eb016e PH |
4149 | is set to the response that should be sent. When it is NULL, we generate |
4150 | default responses. After an ACL error or local_scan() error, the response has | |
4151 | already been sent, and smtp_reply is an empty string to indicate this. */ | |
059ec3d9 PH |
4152 | |
4153 | if (!smtp_batched_input) | |
4154 | { | |
27b9e5f4 | 4155 | if (!smtp_reply) |
059ec3d9 | 4156 | { |
29aba418 | 4157 | if (fake_response != OK) |
27b9e5f4 JH |
4158 | smtp_respond(fake_response == DEFER ? US"450" : US"550", |
4159 | 3, TRUE, fake_response_text); | |
4e88a19f PH |
4160 | |
4161 | /* An OK response is required; use "message" text if present. */ | |
4162 | ||
27b9e5f4 | 4163 | else if (user_msg) |
4e88a19f PH |
4164 | { |
4165 | uschar *code = US"250"; | |
4166 | int len = 3; | |
4f6ae5c3 | 4167 | smtp_message_code(&code, &len, &user_msg, NULL, TRUE); |
4e88a19f PH |
4168 | smtp_respond(code, len, TRUE, user_msg); |
4169 | } | |
4170 | ||
4171 | /* Default OK response */ | |
4172 | ||
7e3ce68e JH |
4173 | else if (chunking_state > CHUNKING_OFFERED) |
4174 | { | |
4175 | smtp_printf("250- %u byte chunk, total %d\r\n250 OK id=%s\r\n", | |
4176 | chunking_datasize, message_size+message_linecount, message_id); | |
4177 | chunking_state = CHUNKING_OFFERED; | |
4178 | } | |
8e669ac1 PH |
4179 | else |
4180 | smtp_printf("250 OK id=%s\r\n", message_id); | |
7e3ce68e | 4181 | |
059ec3d9 PH |
4182 | if (host_checking) |
4183 | fprintf(stdout, | |
4184 | "\n**** SMTP testing: that is not a real message id!\n\n"); | |
4185 | } | |
4e88a19f | 4186 | |
58eb016e | 4187 | /* smtp_reply is set non-empty */ |
4e88a19f | 4188 | |
8523533c TK |
4189 | else if (smtp_reply[0] != 0) |
4190 | { | |
29aba418 | 4191 | if (fake_response != OK && (smtp_reply[0] == '2')) |
a5bd321b PH |
4192 | smtp_respond((fake_response == DEFER)? US"450" : US"550", 3, TRUE, |
4193 | fake_response_text); | |
8e669ac1 | 4194 | else |
6951ac6c PH |
4195 | smtp_printf("%.1024s\r\n", smtp_reply); |
4196 | } | |
e4bdf652 | 4197 | |
817d9f57 JH |
4198 | switch (cutthrough_done) |
4199 | { | |
b784ce7f | 4200 | case ACCEPTED: log_write(0, LOG_MAIN, "Completed");/* Delivery was done */ |
41313d92 JH |
4201 | case PERM_REJ: |
4202 | { /* Delete spool files */ | |
4203 | Uunlink(spool_fname(US"input", message_subdir, message_id, US"-D")); | |
4204 | Uunlink(spool_fname(US"input", message_subdir, message_id, US"-H")); | |
4205 | Uunlink(spool_fname(US"msglog", message_subdir, message_id, US"")); | |
817d9f57 | 4206 | } |
b784ce7f | 4207 | case TMP_REJ: message_id[0] = 0; /* Prevent a delivery from starting */ |
817d9f57 | 4208 | default:break; |
e4bdf652 | 4209 | } |
5032d1cf | 4210 | cutthrough.delivery = FALSE; |
059ec3d9 PH |
4211 | } |
4212 | ||
4213 | /* For batched SMTP, generate an error message on failure, and do | |
4214 | nothing on success. The function moan_smtp_batch() does not return - | |
4215 | it exits from the program with a non-zero return code. */ | |
4216 | ||
27b9e5f4 JH |
4217 | else if (smtp_reply) |
4218 | moan_smtp_batch(NULL, "%s", smtp_reply); | |
059ec3d9 PH |
4219 | } |
4220 | ||
4221 | ||
4222 | /* If blackholing, we can immediately log this message's sad fate. The data | |
4223 | file has already been unlinked, and the header file was never written to disk. | |
4224 | We must now indicate that nothing was received, to prevent a delivery from | |
4225 | starting. */ | |
4226 | ||
27b9e5f4 | 4227 | if (blackholed_by) |
059ec3d9 | 4228 | { |
55414b25 JH |
4229 | const uschar *detail = local_scan_data |
4230 | ? string_printing(local_scan_data) | |
4231 | : string_sprintf("(%s discarded recipients)", blackholed_by); | |
04f7d5b9 | 4232 | log_write(0, LOG_MAIN, "=> blackhole %s%s", detail, blackhole_log_msg); |
059ec3d9 PH |
4233 | log_write(0, LOG_MAIN, "Completed"); |
4234 | message_id[0] = 0; | |
4235 | } | |
4236 | ||
4237 | /* Reset headers so that logging of rejects for a subsequent message doesn't | |
4238 | include them. It is also important to set header_last = NULL before exiting | |
4239 | from this function, as this prevents certain rewrites that might happen during | |
4240 | subsequent verifying (of another incoming message) from trying to add headers | |
4241 | when they shouldn't. */ | |
4242 | ||
4243 | header_list = header_last = NULL; | |
4244 | ||
4245 | return yield; /* TRUE if more messages (SMTP only) */ | |
4246 | } | |
4247 | ||
4248 | /* End of receive.c */ |