Commit | Line | Data |
---|---|---|
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; |
ddf1b11a | 127 | struct stat dummy; |
5cb8cbc6 PH |
128 | uschar *path; |
129 | uschar *name; | |
130 | uschar buffer[1024]; | |
059ec3d9 | 131 | |
5cb8cbc6 | 132 | /* The spool directory must always exist. */ |
059ec3d9 | 133 | |
5cb8cbc6 | 134 | if (isspool) |
059ec3d9 | 135 | { |
8e669ac1 PH |
136 | path = spool_directory; |
137 | name = US"spool"; | |
138 | } | |
139 | ||
059ec3d9 PH |
140 | /* Need to cut down the log file path to the directory, and to ignore any |
141 | appearance of "syslog" in it. */ | |
142 | ||
5cb8cbc6 | 143 | else |
059ec3d9 | 144 | { |
059ec3d9 | 145 | int sep = ':'; /* Not variable - outside scripts use */ |
55414b25 | 146 | const uschar *p = log_file_path; |
8e669ac1 | 147 | name = US"log"; |
059ec3d9 PH |
148 | |
149 | /* An empty log_file_path means "use the default". This is the same as an | |
150 | empty item in a list. */ | |
151 | ||
152 | if (*p == 0) p = US":"; | |
55414b25 JH |
153 | while ((path = string_nextinlist(&p, &sep, buffer, sizeof(buffer)))) |
154 | if (Ustrcmp(path, "syslog") != 0) | |
155 | break; | |
059ec3d9 | 156 | |
5cb8cbc6 PH |
157 | if (path == NULL) /* No log files */ |
158 | { | |
8e669ac1 PH |
159 | *inodeptr = -1; |
160 | return -1; | |
161 | } | |
059ec3d9 | 162 | |
8e669ac1 PH |
163 | /* An empty string means use the default, which is in the spool directory. |
164 | But don't just use the spool directory, as it is possible that the log | |
5cb8cbc6 | 165 | subdirectory has been symbolically linked elsewhere. */ |
059ec3d9 | 166 | |
8e669ac1 | 167 | if (path[0] == 0) |
059ec3d9 | 168 | { |
5cb8cbc6 PH |
169 | sprintf(CS buffer, CS"%s/log", CS spool_directory); |
170 | path = buffer; | |
8e669ac1 PH |
171 | } |
172 | else | |
059ec3d9 | 173 | { |
8e669ac1 | 174 | uschar *cp; |
5cb8cbc6 | 175 | if ((cp = Ustrrchr(path, '/')) != NULL) *cp = 0; |
8e669ac1 | 176 | } |
5cb8cbc6 | 177 | } |
8e669ac1 | 178 | |
8f128379 | 179 | /* We now have the path; do the business */ |
5cb8cbc6 PH |
180 | |
181 | memset(&statbuf, 0, sizeof(statbuf)); | |
182 | ||
183 | if (STATVFS(CS path, &statbuf) != 0) | |
ddf1b11a JH |
184 | if (stat(CS path, &dummy) == -1 && errno == ENOENT) |
185 | { /* Can happen on first run after installation */ | |
186 | *inodeptr = -1; | |
187 | return -1; | |
188 | } | |
189 | else | |
190 | { | |
191 | log_write(0, LOG_MAIN|LOG_PANIC, "cannot accept message: failed to stat " | |
192 | "%s directory %s: %s", name, path, strerror(errno)); | |
193 | smtp_closedown(US"spool or log directory problem"); | |
194 | exim_exit(EXIT_FAILURE); | |
195 | } | |
8e669ac1 | 196 | |
5cb8cbc6 PH |
197 | *inodeptr = (statbuf.F_FILES > 0)? statbuf.F_FAVAIL : -1; |
198 | ||
199 | /* Disks are getting huge. Take care with computing the size in kilobytes. */ | |
8e669ac1 | 200 | |
5cb8cbc6 PH |
201 | return (int)(((double)statbuf.F_BAVAIL * (double)statbuf.F_FRSIZE)/1024.0); |
202 | ||
ddf1b11a | 203 | #else |
5cb8cbc6 PH |
204 | /* Unable to find partition sizes in this environment. */ |
205 | ||
5cb8cbc6 PH |
206 | *inodeptr = -1; |
207 | return -1; | |
208 | #endif | |
209 | } | |
210 | ||
059ec3d9 | 211 | |
059ec3d9 | 212 | |
5cb8cbc6 PH |
213 | |
214 | /************************************************* | |
215 | * Check space on spool and log partitions * | |
216 | *************************************************/ | |
217 | ||
218 | /* This function is called before accepting a message; if any thresholds are | |
219 | set, it checks them. If a message_size is supplied, it checks that there is | |
220 | enough space for that size plus the threshold - i.e. that the message won't | |
221 | reduce the space to the threshold. Not all OS have statvfs(); for those that | |
222 | don't, this function always returns TRUE. For some OS the old function and | |
223 | struct name statfs is used; that is handled by a macro, defined in exim.h. | |
224 | ||
225 | Arguments: | |
226 | msg_size the (estimated) size of an incoming message | |
227 | ||
228 | Returns: FALSE if there isn't enough space, or if the information cannot | |
229 | be obtained | |
230 | TRUE if no check was done or there is enough space | |
231 | */ | |
232 | ||
233 | BOOL | |
234 | receive_check_fs(int msg_size) | |
235 | { | |
236 | int space, inodes; | |
237 | ||
238 | if (check_spool_space > 0 || msg_size > 0 || check_spool_inodes > 0) | |
239 | { | |
8e669ac1 PH |
240 | space = receive_statvfs(TRUE, &inodes); |
241 | ||
059ec3d9 | 242 | DEBUG(D_receive) |
5cb8cbc6 PH |
243 | debug_printf("spool directory space = %dK inodes = %d " |
244 | "check_space = %dK inodes = %d msg_size = %d\n", | |
245 | space, inodes, check_spool_space, check_spool_inodes, msg_size); | |
8e669ac1 PH |
246 | |
247 | if ((space >= 0 && space < check_spool_space) || | |
5cb8cbc6 | 248 | (inodes >= 0 && inodes < check_spool_inodes)) |
8e669ac1 | 249 | { |
5cb8cbc6 PH |
250 | log_write(0, LOG_MAIN, "spool directory space check failed: space=%d " |
251 | "inodes=%d", space, inodes); | |
059ec3d9 PH |
252 | return FALSE; |
253 | } | |
254 | } | |
255 | ||
5cb8cbc6 PH |
256 | if (check_log_space > 0 || check_log_inodes > 0) |
257 | { | |
8e669ac1 PH |
258 | space = receive_statvfs(FALSE, &inodes); |
259 | ||
5cb8cbc6 PH |
260 | DEBUG(D_receive) |
261 | debug_printf("log directory space = %dK inodes = %d " | |
262 | "check_space = %dK inodes = %d\n", | |
263 | space, inodes, check_log_space, check_log_inodes); | |
8e669ac1 PH |
264 | |
265 | if ((space >= 0 && space < check_log_space) || | |
5cb8cbc6 | 266 | (inodes >= 0 && inodes < check_log_inodes)) |
8e669ac1 | 267 | { |
5cb8cbc6 PH |
268 | log_write(0, LOG_MAIN, "log directory space check failed: space=%d " |
269 | "inodes=%d", space, inodes); | |
270 | return FALSE; | |
271 | } | |
8e669ac1 PH |
272 | } |
273 | ||
059ec3d9 PH |
274 | return TRUE; |
275 | } | |
276 | ||
277 | ||
278 | ||
279 | /************************************************* | |
280 | * Bomb out while reading a message * | |
281 | *************************************************/ | |
282 | ||
283 | /* The common case of wanting to bomb out is if a SIGTERM or SIGINT is | |
284 | received, or if there is a timeout. A rarer case might be if the log files are | |
285 | screwed up and Exim can't open them to record a message's arrival. Handling | |
286 | that case is done by setting a flag to cause the log functions to call this | |
287 | function if there is an ultimate disaster. That is why it is globally | |
288 | accessible. | |
289 | ||
8f128379 PH |
290 | Arguments: |
291 | reason text reason to pass to the not-quit ACL | |
292 | msg default SMTP response to give if in an SMTP session | |
059ec3d9 PH |
293 | Returns: it doesn't |
294 | */ | |
295 | ||
296 | void | |
8f128379 | 297 | receive_bomb_out(uschar *reason, uschar *msg) |
059ec3d9 | 298 | { |
ead37e6c PP |
299 | static BOOL already_bombing_out; |
300 | /* The smtp_notquit_exit() below can call ACLs which can trigger recursive | |
301 | timeouts, if someone has something slow in their quit ACL. Since the only | |
302 | things we should be doing are to close down cleanly ASAP, on the second | |
303 | pass we also close down stuff that might be opened again, before bypassing | |
304 | the ACL call and exiting. */ | |
305 | ||
059ec3d9 PH |
306 | /* If spool_name is set, it contains the name of the data file that is being |
307 | written. Unlink it before closing so that it cannot be picked up by a delivery | |
308 | process. Ensure that any header file is also removed. */ | |
309 | ||
ead37e6c | 310 | if (spool_name[0] != '\0') |
059ec3d9 PH |
311 | { |
312 | Uunlink(spool_name); | |
313 | spool_name[Ustrlen(spool_name) - 1] = 'H'; | |
314 | Uunlink(spool_name); | |
ead37e6c | 315 | spool_name[0] = '\0'; |
059ec3d9 PH |
316 | } |
317 | ||
318 | /* Now close the file if it is open, either as a fd or a stream. */ | |
319 | ||
ead37e6c PP |
320 | if (data_file != NULL) |
321 | { | |
322 | (void)fclose(data_file); | |
323 | data_file = NULL; | |
324 | } else if (data_fd >= 0) { | |
325 | (void)close(data_fd); | |
326 | data_fd = -1; | |
327 | } | |
059ec3d9 | 328 | |
8f128379 PH |
329 | /* Attempt to close down an SMTP connection tidily. For non-batched SMTP, call |
330 | smtp_notquit_exit(), which runs the NOTQUIT ACL, if present, and handles the | |
331 | SMTP response. */ | |
059ec3d9 | 332 | |
ead37e6c | 333 | if (!already_bombing_out) |
059ec3d9 | 334 | { |
ead37e6c PP |
335 | already_bombing_out = TRUE; |
336 | if (smtp_input) | |
337 | { | |
338 | if (smtp_batched_input) | |
339 | moan_smtp_batch(NULL, "421 %s - message abandoned", msg); /* No return */ | |
340 | smtp_notquit_exit(reason, US"421", US"%s %s - closing connection.", | |
341 | smtp_active_hostname, msg); | |
342 | } | |
059ec3d9 PH |
343 | } |
344 | ||
345 | /* Exit from the program (non-BSMTP cases) */ | |
346 | ||
347 | exim_exit(EXIT_FAILURE); | |
348 | } | |
349 | ||
350 | ||
351 | /************************************************* | |
352 | * Data read timeout * | |
353 | *************************************************/ | |
354 | ||
355 | /* Handler function for timeouts that occur while reading the data that | |
356 | comprises a message. | |
357 | ||
358 | Argument: the signal number | |
359 | Returns: nothing | |
360 | */ | |
361 | ||
362 | static void | |
363 | data_timeout_handler(int sig) | |
364 | { | |
365 | uschar *msg = NULL; | |
366 | ||
367 | sig = sig; /* Keep picky compilers happy */ | |
368 | ||
369 | if (smtp_input) | |
370 | { | |
371 | msg = US"SMTP incoming data timeout"; | |
372 | log_write(L_lost_incoming_connection, | |
373 | LOG_MAIN, "SMTP data timeout (message abandoned) on connection " | |
fed77020 PH |
374 | "from %s F=<%s>", |
375 | (sender_fullhost != NULL)? sender_fullhost : US"local process", | |
376 | sender_address); | |
059ec3d9 PH |
377 | } |
378 | else | |
379 | { | |
380 | fprintf(stderr, "exim: timed out while reading - message abandoned\n"); | |
381 | log_write(L_lost_incoming_connection, | |
382 | LOG_MAIN, "timed out while reading local message"); | |
383 | } | |
384 | ||
8f128379 | 385 | receive_bomb_out(US"data-timeout", msg); /* Does not return */ |
059ec3d9 PH |
386 | } |
387 | ||
388 | ||
389 | ||
390 | /************************************************* | |
391 | * local_scan() timeout * | |
392 | *************************************************/ | |
393 | ||
394 | /* Handler function for timeouts that occur while running a local_scan() | |
395 | function. | |
396 | ||
397 | Argument: the signal number | |
398 | Returns: nothing | |
399 | */ | |
400 | ||
401 | static void | |
402 | local_scan_timeout_handler(int sig) | |
403 | { | |
404 | sig = sig; /* Keep picky compilers happy */ | |
405 | log_write(0, LOG_MAIN|LOG_REJECT, "local_scan() function timed out - " | |
406 | "message temporarily rejected (size %d)", message_size); | |
8f128379 PH |
407 | /* Does not return */ |
408 | receive_bomb_out(US"local-scan-timeout", US"local verification problem"); | |
059ec3d9 PH |
409 | } |
410 | ||
411 | ||
412 | ||
413 | /************************************************* | |
414 | * local_scan() crashed * | |
415 | *************************************************/ | |
416 | ||
417 | /* Handler function for signals that occur while running a local_scan() | |
418 | function. | |
419 | ||
420 | Argument: the signal number | |
421 | Returns: nothing | |
422 | */ | |
423 | ||
424 | static void | |
425 | local_scan_crash_handler(int sig) | |
426 | { | |
427 | log_write(0, LOG_MAIN|LOG_REJECT, "local_scan() function crashed with " | |
428 | "signal %d - message temporarily rejected (size %d)", sig, message_size); | |
8f128379 PH |
429 | /* Does not return */ |
430 | receive_bomb_out(US"local-scan-error", US"local verification problem"); | |
059ec3d9 PH |
431 | } |
432 | ||
433 | ||
434 | /************************************************* | |
435 | * SIGTERM or SIGINT received * | |
436 | *************************************************/ | |
437 | ||
438 | /* Handler for SIGTERM or SIGINT signals that occur while reading the | |
439 | data that comprises a message. | |
440 | ||
441 | Argument: the signal number | |
442 | Returns: nothing | |
443 | */ | |
444 | ||
445 | static void | |
446 | data_sigterm_sigint_handler(int sig) | |
447 | { | |
448 | uschar *msg = NULL; | |
449 | ||
450 | if (smtp_input) | |
451 | { | |
452 | msg = US"Service not available - SIGTERM or SIGINT received"; | |
453 | log_write(0, LOG_MAIN, "%s closed after %s", smtp_get_connection_info(), | |
454 | (sig == SIGTERM)? "SIGTERM" : "SIGINT"); | |
455 | } | |
456 | else | |
457 | { | |
f05da2e8 | 458 | if (filter_test == FTEST_NONE) |
059ec3d9 PH |
459 | { |
460 | fprintf(stderr, "\nexim: %s received - message abandoned\n", | |
461 | (sig == SIGTERM)? "SIGTERM" : "SIGINT"); | |
462 | log_write(0, LOG_MAIN, "%s received while reading local message", | |
463 | (sig == SIGTERM)? "SIGTERM" : "SIGINT"); | |
464 | } | |
465 | } | |
466 | ||
8f128379 | 467 | receive_bomb_out(US"signal-exit", msg); /* Does not return */ |
059ec3d9 PH |
468 | } |
469 | ||
470 | ||
471 | ||
472 | /************************************************* | |
473 | * Add new recipient to list * | |
474 | *************************************************/ | |
475 | ||
476 | /* This function builds a list of recipient addresses in argc/argv | |
477 | format. | |
478 | ||
479 | Arguments: | |
480 | recipient the next address to add to recipients_list | |
481 | pno parent number for fixed aliases; -1 otherwise | |
482 | ||
483 | Returns: nothing | |
484 | */ | |
485 | ||
486 | void | |
487 | receive_add_recipient(uschar *recipient, int pno) | |
488 | { | |
489 | if (recipients_count >= recipients_list_max) | |
490 | { | |
491 | recipient_item *oldlist = recipients_list; | |
492 | int oldmax = recipients_list_max; | |
493 | recipients_list_max = recipients_list_max? 2*recipients_list_max : 50; | |
494 | recipients_list = store_get(recipients_list_max * sizeof(recipient_item)); | |
495 | if (oldlist != NULL) | |
496 | memcpy(recipients_list, oldlist, oldmax * sizeof(recipient_item)); | |
497 | } | |
498 | ||
499 | recipients_list[recipients_count].address = recipient; | |
500 | recipients_list[recipients_count].pno = pno; | |
8523533c TK |
501 | #ifdef EXPERIMENTAL_BRIGHTMAIL |
502 | recipients_list[recipients_count].bmi_optin = bmi_current_optin; | |
503 | /* reset optin string pointer for next recipient */ | |
504 | bmi_current_optin = NULL; | |
505 | #endif | |
6c1c3d1d WB |
506 | recipients_list[recipients_count].orcpt = NULL; |
507 | recipients_list[recipients_count].dsn_flags = 0; | |
059ec3d9 PH |
508 | recipients_list[recipients_count++].errors_to = NULL; |
509 | } | |
510 | ||
511 | ||
512 | ||
513 | ||
fd98a5c6 JH |
514 | /************************************************* |
515 | * Send user response message * | |
516 | *************************************************/ | |
61147df4 | 517 | |
fd98a5c6 JH |
518 | /* This function is passed a default response code and a user message. It calls |
519 | smtp_message_code() to check and possibly modify the response code, and then | |
520 | calls smtp_respond() to transmit the response. I put this into a function | |
521 | just to avoid a lot of repetition. | |
61147df4 PP |
522 | |
523 | Arguments: | |
fd98a5c6 JH |
524 | code the response code |
525 | user_msg the user message | |
526 | ||
527 | Returns: nothing | |
61147df4 PP |
528 | */ |
529 | ||
8ccd00b1 | 530 | #ifndef DISABLE_PRDR |
61147df4 | 531 | static void |
fd98a5c6 | 532 | smtp_user_msg(uschar *code, uschar *user_msg) |
61147df4 | 533 | { |
fd98a5c6 | 534 | int len = 3; |
4f6ae5c3 | 535 | smtp_message_code(&code, &len, &user_msg, NULL, TRUE); |
fd98a5c6 | 536 | smtp_respond(code, len, TRUE, user_msg); |
61147df4 PP |
537 | } |
538 | #endif | |
539 | ||
540 | ||
541 | ||
542 | ||
fd98a5c6 | 543 | |
059ec3d9 PH |
544 | /************************************************* |
545 | * Remove a recipient from the list * | |
546 | *************************************************/ | |
547 | ||
548 | /* This function is provided for local_scan() to use. | |
549 | ||
550 | Argument: | |
551 | recipient address to remove | |
552 | ||
553 | Returns: TRUE if it did remove something; FALSE otherwise | |
554 | */ | |
555 | ||
556 | BOOL | |
557 | receive_remove_recipient(uschar *recipient) | |
558 | { | |
559 | int count; | |
560 | DEBUG(D_receive) debug_printf("receive_remove_recipient(\"%s\") called\n", | |
561 | recipient); | |
562 | for (count = 0; count < recipients_count; count++) | |
563 | { | |
564 | if (Ustrcmp(recipients_list[count].address, recipient) == 0) | |
565 | { | |
566 | if ((--recipients_count - count) > 0) | |
567 | memmove(recipients_list + count, recipients_list + count + 1, | |
54cdb463 | 568 | (recipients_count - count)*sizeof(recipient_item)); |
059ec3d9 PH |
569 | return TRUE; |
570 | } | |
571 | } | |
572 | return FALSE; | |
573 | } | |
574 | ||
575 | ||
576 | ||
577 | ||
578 | ||
579 | /************************************************* | |
580 | * Read data portion of a non-SMTP message * | |
581 | *************************************************/ | |
582 | ||
583 | /* This function is called to read the remainder of a message (following the | |
584 | header) when the input is not from SMTP - we are receiving a local message on | |
585 | a standard input stream. The message is always terminated by EOF, and is also | |
586 | terminated by a dot on a line by itself if the flag dot_ends is TRUE. Split the | |
587 | two cases for maximum efficiency. | |
588 | ||
589 | Ensure that the body ends with a newline. This will naturally be the case when | |
590 | the termination is "\n.\n" but may not be otherwise. The RFC defines messages | |
591 | as "sequences of lines" - this of course strictly applies only to SMTP, but | |
592 | deliveries into BSD-type mailbox files also require it. Exim used to have a | |
593 | flag for doing this at delivery time, but as it was always set for all | |
594 | transports, I decided to simplify things by putting the check here instead. | |
595 | ||
596 | There is at least one MUA (dtmail) that sends CRLF via this interface, and | |
597 | other programs are known to do this as well. Exim used to have a option for | |
598 | dealing with this: in July 2003, after much discussion, the code has been | |
599 | changed to default to treat any of LF, CRLF, and bare CR as line terminators. | |
600 | ||
601 | However, for the case when a dot on a line by itself terminates a message, the | |
602 | only recognized terminating sequences before and after the dot are LF and CRLF. | |
603 | Otherwise, having read EOL . CR, you don't know whether to read another | |
604 | character or not. | |
605 | ||
606 | Internally, in messages stored in Exim's spool files, LF is used as the line | |
607 | terminator. Under the new regime, bare CRs will no longer appear in these | |
608 | files. | |
609 | ||
610 | Arguments: | |
611 | fout a FILE to which to write the message | |
612 | ||
613 | Returns: One of the END_xxx values indicating why it stopped reading | |
614 | */ | |
615 | ||
616 | static int | |
617 | read_message_data(FILE *fout) | |
618 | { | |
619 | int ch_state; | |
620 | register int ch; | |
d677b2f2 | 621 | register int linelength = 0; |
059ec3d9 PH |
622 | |
623 | /* Handle the case when only EOF terminates the message */ | |
624 | ||
625 | if (!dot_ends) | |
626 | { | |
627 | register int last_ch = '\n'; | |
628 | ||
80a47a2c | 629 | for (; (ch = (receive_getc)()) != EOF; last_ch = ch) |
059ec3d9 PH |
630 | { |
631 | if (ch == 0) body_zerocount++; | |
632 | if (last_ch == '\r' && ch != '\n') | |
633 | { | |
d677b2f2 PH |
634 | if (linelength > max_received_linelength) |
635 | max_received_linelength = linelength; | |
636 | linelength = 0; | |
059ec3d9 PH |
637 | if (fputc('\n', fout) == EOF) return END_WERROR; |
638 | message_size++; | |
639 | body_linecount++; | |
640 | } | |
641 | if (ch == '\r') continue; | |
642 | ||
643 | if (fputc(ch, fout) == EOF) return END_WERROR; | |
d677b2f2 PH |
644 | if (ch == '\n') |
645 | { | |
646 | if (linelength > max_received_linelength) | |
647 | max_received_linelength = linelength; | |
648 | linelength = 0; | |
649 | body_linecount++; | |
650 | } | |
651 | else linelength++; | |
059ec3d9 PH |
652 | if (++message_size > thismessage_size_limit) return END_SIZE; |
653 | } | |
654 | ||
655 | if (last_ch != '\n') | |
656 | { | |
d677b2f2 PH |
657 | if (linelength > max_received_linelength) |
658 | max_received_linelength = linelength; | |
059ec3d9 PH |
659 | if (fputc('\n', fout) == EOF) return END_WERROR; |
660 | message_size++; | |
661 | body_linecount++; | |
662 | } | |
663 | ||
664 | return END_EOF; | |
665 | } | |
666 | ||
667 | /* Handle the case when a dot on a line on its own, or EOF, terminates. */ | |
668 | ||
669 | ch_state = 1; | |
670 | ||
80a47a2c | 671 | while ((ch = (receive_getc)()) != EOF) |
059ec3d9 PH |
672 | { |
673 | if (ch == 0) body_zerocount++; | |
674 | switch (ch_state) | |
675 | { | |
676 | case 0: /* Normal state (previous char written) */ | |
677 | if (ch == '\n') | |
d677b2f2 PH |
678 | { |
679 | body_linecount++; | |
680 | if (linelength > max_received_linelength) | |
681 | max_received_linelength = linelength; | |
682 | linelength = -1; | |
683 | ch_state = 1; | |
684 | } | |
059ec3d9 PH |
685 | else if (ch == '\r') |
686 | { ch_state = 2; continue; } | |
687 | break; | |
688 | ||
689 | case 1: /* After written "\n" */ | |
690 | if (ch == '.') { ch_state = 3; continue; } | |
6eb02f88 | 691 | if (ch == '\r') { ch_state = 2; continue; } |
3581f321 JH |
692 | if (ch == '\n') { body_linecount++; linelength = -1; } |
693 | else ch_state = 0; | |
059ec3d9 PH |
694 | break; |
695 | ||
696 | case 2: | |
697 | body_linecount++; /* After unwritten "\r" */ | |
d677b2f2 PH |
698 | if (linelength > max_received_linelength) |
699 | max_received_linelength = linelength; | |
059ec3d9 | 700 | if (ch == '\n') |
d677b2f2 PH |
701 | { |
702 | ch_state = 1; | |
703 | linelength = -1; | |
704 | } | |
059ec3d9 PH |
705 | else |
706 | { | |
707 | if (message_size++, fputc('\n', fout) == EOF) return END_WERROR; | |
708 | if (ch == '\r') continue; | |
709 | ch_state = 0; | |
d677b2f2 | 710 | linelength = 0; |
059ec3d9 PH |
711 | } |
712 | break; | |
713 | ||
714 | case 3: /* After "\n." (\n written, dot not) */ | |
715 | if (ch == '\n') return END_DOT; | |
716 | if (ch == '\r') { ch_state = 4; continue; } | |
717 | message_size++; | |
d677b2f2 | 718 | linelength++; |
059ec3d9 PH |
719 | if (fputc('.', fout) == EOF) return END_WERROR; |
720 | ch_state = 0; | |
721 | break; | |
722 | ||
723 | case 4: /* After "\n.\r" (\n written, rest not) */ | |
724 | if (ch == '\n') return END_DOT; | |
725 | message_size += 2; | |
726 | body_linecount++; | |
727 | if (fputs(".\n", fout) == EOF) return END_WERROR; | |
728 | if (ch == '\r') { ch_state = 2; continue; } | |
729 | ch_state = 0; | |
730 | break; | |
731 | } | |
732 | ||
d677b2f2 | 733 | linelength++; |
059ec3d9 PH |
734 | if (fputc(ch, fout) == EOF) return END_WERROR; |
735 | if (++message_size > thismessage_size_limit) return END_SIZE; | |
736 | } | |
737 | ||
738 | /* Get here if EOF read. Unless we have just written "\n", we need to ensure | |
739 | the message ends with a newline, and we must also write any characters that | |
740 | were saved up while testing for an ending dot. */ | |
741 | ||
742 | if (ch_state != 1) | |
743 | { | |
744 | static uschar *ends[] = { US"\n", NULL, US"\n", US".\n", US".\n" }; | |
745 | if (fputs(CS ends[ch_state], fout) == EOF) return END_WERROR; | |
746 | message_size += Ustrlen(ends[ch_state]); | |
747 | body_linecount++; | |
748 | } | |
749 | ||
750 | return END_EOF; | |
751 | } | |
752 | ||
753 | ||
754 | ||
755 | ||
756 | /************************************************* | |
757 | * Read data portion of an SMTP message * | |
758 | *************************************************/ | |
759 | ||
760 | /* This function is called to read the remainder of an SMTP message (after the | |
761 | headers), or to skip over it when an error has occurred. In this case, the | |
762 | output file is passed as NULL. | |
763 | ||
764 | If any line begins with a dot, that character is skipped. The input should only | |
765 | be successfully terminated by CR LF . CR LF unless it is local (non-network) | |
766 | SMTP, in which case the CRs are optional, but... | |
767 | ||
768 | FUDGE: It seems that sites on the net send out messages with just LF | |
769 | terminators, despite the warnings in the RFCs, and other MTAs handle this. So | |
770 | we make the CRs optional in all cases. | |
771 | ||
772 | July 2003: Bare CRs cause trouble. We now treat them as line terminators as | |
773 | well, so that there are no CRs in spooled messages. However, the message | |
774 | terminating dot is not recognized between two bare CRs. | |
775 | ||
776 | Arguments: | |
777 | fout a FILE to which to write the message; NULL if skipping | |
778 | ||
779 | Returns: One of the END_xxx values indicating why it stopped reading | |
780 | */ | |
781 | ||
782 | static int | |
783 | read_message_data_smtp(FILE *fout) | |
784 | { | |
785 | int ch_state = 0; | |
e4bdf652 | 786 | int ch; |
7e3ce68e | 787 | int linelength = 0; |
059ec3d9 | 788 | |
80a47a2c | 789 | while ((ch = (receive_getc)()) != EOF) |
059ec3d9 PH |
790 | { |
791 | if (ch == 0) body_zerocount++; | |
792 | switch (ch_state) | |
793 | { | |
794 | case 0: /* After LF or CRLF */ | |
795 | if (ch == '.') | |
796 | { | |
797 | ch_state = 3; | |
798 | continue; /* Don't ever write . after LF */ | |
799 | } | |
800 | ch_state = 1; | |
801 | ||
802 | /* Else fall through to handle as normal uschar. */ | |
803 | ||
804 | case 1: /* Normal state */ | |
805 | if (ch == '\n') | |
806 | { | |
807 | ch_state = 0; | |
808 | body_linecount++; | |
1f5497b2 PH |
809 | if (linelength > max_received_linelength) |
810 | max_received_linelength = linelength; | |
811 | linelength = -1; | |
059ec3d9 PH |
812 | } |
813 | else if (ch == '\r') | |
814 | { | |
815 | ch_state = 2; | |
816 | continue; | |
817 | } | |
818 | break; | |
819 | ||
820 | case 2: /* After (unwritten) CR */ | |
821 | body_linecount++; | |
1f5497b2 PH |
822 | if (linelength > max_received_linelength) |
823 | max_received_linelength = linelength; | |
824 | linelength = -1; | |
059ec3d9 PH |
825 | if (ch == '\n') |
826 | { | |
827 | ch_state = 0; | |
828 | } | |
829 | else | |
830 | { | |
831 | message_size++; | |
832 | if (fout != NULL && fputc('\n', fout) == EOF) return END_WERROR; | |
e4bdf652 | 833 | (void) cutthrough_put_nl(); |
059ec3d9 PH |
834 | if (ch != '\r') ch_state = 1; else continue; |
835 | } | |
836 | break; | |
837 | ||
838 | case 3: /* After [CR] LF . */ | |
839 | if (ch == '\n') | |
840 | return END_DOT; | |
841 | if (ch == '\r') | |
842 | { | |
843 | ch_state = 4; | |
844 | continue; | |
845 | } | |
1bc460a6 JH |
846 | /* The dot was removed at state 3. For a doubled dot, here, reinstate |
847 | it to cutthrough. The current ch, dot or not, is passed both to cutthrough | |
848 | and to file below. */ | |
849 | if (ch == '.') | |
850 | { | |
851 | uschar c= ch; | |
852 | (void) cutthrough_puts(&c, 1); | |
853 | } | |
854 | ch_state = 1; | |
059ec3d9 PH |
855 | break; |
856 | ||
857 | case 4: /* After [CR] LF . CR */ | |
858 | if (ch == '\n') return END_DOT; | |
859 | message_size++; | |
860 | body_linecount++; | |
861 | if (fout != NULL && fputc('\n', fout) == EOF) return END_WERROR; | |
e4bdf652 | 862 | (void) cutthrough_put_nl(); |
059ec3d9 PH |
863 | if (ch == '\r') |
864 | { | |
865 | ch_state = 2; | |
866 | continue; | |
867 | } | |
868 | ch_state = 1; | |
869 | break; | |
870 | } | |
871 | ||
872 | /* Add the character to the spool file, unless skipping; then loop for the | |
873 | next. */ | |
874 | ||
875 | message_size++; | |
1f5497b2 | 876 | linelength++; |
7e3ce68e | 877 | if (fout) |
059ec3d9 PH |
878 | { |
879 | if (fputc(ch, fout) == EOF) return END_WERROR; | |
880 | if (message_size > thismessage_size_limit) return END_SIZE; | |
881 | } | |
e4bdf652 JH |
882 | if(ch == '\n') |
883 | (void) cutthrough_put_nl(); | |
884 | else | |
885 | { | |
7e3ce68e | 886 | uschar c = ch; |
e4bdf652 JH |
887 | (void) cutthrough_puts(&c, 1); |
888 | } | |
059ec3d9 PH |
889 | } |
890 | ||
891 | /* Fall through here if EOF encountered. This indicates some kind of error, | |
892 | since a correct message is terminated by [CR] LF . [CR] LF. */ | |
893 | ||
894 | return END_EOF; | |
895 | } | |
896 | ||
897 | ||
898 | ||
899 | ||
7e3ce68e JH |
900 | /* Variant of the above read_message_data_smtp() specialised for RFC 3030 |
901 | CHUNKING. We assume that the incoming has proper CRLF, so only have to scan | |
902 | for and strip CR. On the downside there are more protocol reasons to stop. | |
903 | ||
904 | Arguments: | |
905 | fout a FILE to which to write the message; NULL if skipping | |
906 | ||
907 | Returns: One of the END_xxx values indicating why it stopped reading | |
908 | */ | |
909 | ||
910 | static int | |
911 | read_message_bdat_smtp(FILE *fout) | |
912 | { | |
913 | int ch; | |
914 | int linelength = 0; | |
915 | ||
916 | for (;;) switch (ch = bdat_getc()) | |
917 | { | |
918 | case EOF: return END_EOF; | |
919 | case EOD: return END_DOT; | |
920 | case ERR: return END_PROTOCOL; | |
921 | ||
922 | case '\r': | |
923 | body_linecount++; | |
924 | if (linelength > max_received_linelength) | |
925 | max_received_linelength = linelength; | |
926 | linelength = -1; | |
927 | break; | |
928 | ||
929 | case 0: | |
930 | body_zerocount++; | |
931 | /*FALLTHROUGH*/ | |
932 | default: | |
933 | message_size++; | |
934 | linelength++; | |
935 | if (fout) | |
936 | { | |
937 | if (fputc(ch, fout) == EOF) return END_WERROR; | |
938 | if (message_size > thismessage_size_limit) return END_SIZE; | |
939 | } | |
940 | #ifdef notyet | |
941 | if(ch == '\n') | |
942 | (void) cutthrough_put_nl(); | |
943 | else | |
944 | { | |
945 | uschar c = ch; | |
946 | (void) cutthrough_puts(&c, 1); | |
947 | } | |
948 | #endif | |
949 | break; | |
950 | } | |
951 | /*NOTREACHED*/ | |
952 | } | |
953 | ||
954 | ||
955 | ||
956 | ||
059ec3d9 PH |
957 | /************************************************* |
958 | * Swallow SMTP message * | |
959 | *************************************************/ | |
960 | ||
961 | /* This function is called when there has been some kind of error while reading | |
962 | an SMTP message, and the remaining data may need to be swallowed. It is global | |
963 | because it is called from smtp_closedown() to shut down an incoming call | |
964 | tidily. | |
965 | ||
966 | Argument: a FILE from which to read the message | |
967 | Returns: nothing | |
968 | */ | |
969 | ||
970 | void | |
971 | receive_swallow_smtp(void) | |
972 | { | |
7e3ce68e | 973 | /*XXX CHUNKING: not enough. read chunks until RSET? */ |
059ec3d9 PH |
974 | if (message_ended >= END_NOTENDED) |
975 | message_ended = read_message_data_smtp(NULL); | |
976 | } | |
977 | ||
978 | ||
979 | ||
980 | /************************************************* | |
981 | * Handle lost SMTP connection * | |
982 | *************************************************/ | |
983 | ||
984 | /* This function logs connection loss incidents and generates an appropriate | |
985 | SMTP response. | |
986 | ||
987 | Argument: additional data for the message | |
988 | Returns: the SMTP response | |
989 | */ | |
990 | ||
991 | static uschar * | |
992 | handle_lost_connection(uschar *s) | |
993 | { | |
994 | log_write(L_lost_incoming_connection | L_smtp_connection, LOG_MAIN, | |
995 | "%s lost while reading message data%s", smtp_get_connection_info(), s); | |
eea0defe | 996 | smtp_notquit_exit(US"connection-lost", NULL, NULL); |
059ec3d9 PH |
997 | return US"421 Lost incoming connection"; |
998 | } | |
999 | ||
1000 | ||
1001 | ||
1002 | ||
1003 | /************************************************* | |
1004 | * Handle a non-smtp reception error * | |
1005 | *************************************************/ | |
1006 | ||
1007 | /* This function is called for various errors during the reception of non-SMTP | |
1008 | messages. It either sends a message to the sender of the problem message, or it | |
1009 | writes to the standard error stream. | |
1010 | ||
1011 | Arguments: | |
1012 | errcode code for moan_to_sender(), identifying the error | |
1013 | text1 first message text, passed to moan_to_sender() | |
1014 | text2 second message text, used only for stderrr | |
1015 | error_rc code to pass to exim_exit if no problem | |
1016 | f FILE containing body of message (may be stdin) | |
1017 | hptr pointer to instore headers or NULL | |
1018 | ||
1019 | Returns: calls exim_exit(), which does not return | |
1020 | */ | |
1021 | ||
1022 | static void | |
1023 | give_local_error(int errcode, uschar *text1, uschar *text2, int error_rc, | |
1024 | FILE *f, header_line *hptr) | |
1025 | { | |
1026 | if (error_handling == ERRORS_SENDER) | |
1027 | { | |
1028 | error_block eblock; | |
1029 | eblock.next = NULL; | |
1030 | eblock.text1 = text1; | |
37f3dc43 | 1031 | eblock.text2 = US""; |
059ec3d9 PH |
1032 | if (!moan_to_sender(errcode, &eblock, hptr, f, FALSE)) |
1033 | error_rc = EXIT_FAILURE; | |
1034 | } | |
37f3dc43 JH |
1035 | else |
1036 | fprintf(stderr, "exim: %s%s\n", text2, text1); /* Sic */ | |
f1e894f3 | 1037 | (void)fclose(f); |
059ec3d9 PH |
1038 | exim_exit(error_rc); |
1039 | } | |
1040 | ||
1041 | ||
1042 | ||
1043 | /************************************************* | |
1044 | * Add header lines set up by ACL * | |
1045 | *************************************************/ | |
1046 | ||
850635b6 PH |
1047 | /* This function is called to add the header lines that were set up by |
1048 | statements in an ACL to the list of headers in memory. It is done in two stages | |
1049 | like this, because when the ACL for RCPT is running, the other headers have not | |
1050 | yet been received. This function is called twice; once just before running the | |
1051 | DATA ACL, and once after. This is so that header lines added by MAIL or RCPT | |
1052 | are visible to the DATA ACL. | |
059ec3d9 PH |
1053 | |
1054 | Originally these header lines were added at the end. Now there is support for | |
1055 | three different places: top, bottom, and after the Received: header(s). There | |
1056 | will always be at least one Received: header, even if it is marked deleted, and | |
1057 | even if something else has been put in front of it. | |
1058 | ||
1059 | Arguments: | |
1060 | acl_name text to identify which ACL | |
1061 | ||
1062 | Returns: nothing | |
1063 | */ | |
1064 | ||
1065 | static void | |
578d43dc | 1066 | add_acl_headers(int where, uschar *acl_name) |
059ec3d9 PH |
1067 | { |
1068 | header_line *h, *next; | |
1069 | header_line *last_received = NULL; | |
e7568d51 | 1070 | |
578d43dc JH |
1071 | switch(where) |
1072 | { | |
1073 | case ACL_WHERE_DKIM: | |
1074 | case ACL_WHERE_MIME: | |
af4a1bca | 1075 | case ACL_WHERE_DATA: |
5032d1cf | 1076 | if (cutthrough.fd >= 0 && (acl_removed_headers || acl_added_headers)) |
578d43dc JH |
1077 | { |
1078 | log_write(0, LOG_MAIN|LOG_PANIC, "Header modification in data ACLs" | |
af4a1bca | 1079 | " will not take effect on cutthrough deliveries"); |
578d43dc JH |
1080 | return; |
1081 | } | |
1082 | } | |
1083 | ||
e7568d51 TL |
1084 | if (acl_removed_headers != NULL) |
1085 | { | |
1086 | DEBUG(D_receive|D_acl) debug_printf(">>Headers removed by %s ACL:\n", acl_name); | |
1087 | ||
4a142059 | 1088 | for (h = header_list; h != NULL; h = h->next) if (h->type != htype_old) |
e7568d51 | 1089 | { |
55414b25 | 1090 | const uschar * list = acl_removed_headers; |
e7568d51 TL |
1091 | int sep = ':'; /* This is specified as a colon-separated list */ |
1092 | uschar *s; | |
1093 | uschar buffer[128]; | |
4a142059 JH |
1094 | |
1095 | while ((s = string_nextinlist(&list, &sep, buffer, sizeof(buffer)))) | |
1096 | if (header_testname(h, s, Ustrlen(s), FALSE)) | |
e7568d51 TL |
1097 | { |
1098 | h->type = htype_old; | |
1099 | DEBUG(D_receive|D_acl) debug_printf(" %s", h->text); | |
1100 | } | |
e7568d51 TL |
1101 | } |
1102 | acl_removed_headers = NULL; | |
1103 | DEBUG(D_receive|D_acl) debug_printf(">>\n"); | |
1104 | } | |
059ec3d9 | 1105 | |
71fafd95 | 1106 | if (acl_added_headers == NULL) return; |
059ec3d9 PH |
1107 | DEBUG(D_receive|D_acl) debug_printf(">>Headers added by %s ACL:\n", acl_name); |
1108 | ||
71fafd95 | 1109 | for (h = acl_added_headers; h != NULL; h = next) |
059ec3d9 PH |
1110 | { |
1111 | next = h->next; | |
1112 | ||
1113 | switch(h->type) | |
1114 | { | |
1115 | case htype_add_top: | |
1116 | h->next = header_list; | |
1117 | header_list = h; | |
1118 | DEBUG(D_receive|D_acl) debug_printf(" (at top)"); | |
1119 | break; | |
1120 | ||
1121 | case htype_add_rec: | |
1122 | if (last_received == NULL) | |
1123 | { | |
1124 | last_received = header_list; | |
1125 | while (!header_testname(last_received, US"Received", 8, FALSE)) | |
1126 | last_received = last_received->next; | |
1127 | while (last_received->next != NULL && | |
1128 | header_testname(last_received->next, US"Received", 8, FALSE)) | |
1129 | last_received = last_received->next; | |
1130 | } | |
1131 | h->next = last_received->next; | |
1132 | last_received->next = h; | |
1133 | DEBUG(D_receive|D_acl) debug_printf(" (after Received:)"); | |
1134 | break; | |
1135 | ||
8523533c TK |
1136 | case htype_add_rfc: |
1137 | /* add header before any header which is NOT Received: or Resent- */ | |
1138 | last_received = header_list; | |
1139 | while ( (last_received->next != NULL) && | |
1140 | ( (header_testname(last_received->next, US"Received", 8, FALSE)) || | |
1141 | (header_testname_incomplete(last_received->next, US"Resent-", 7, FALSE)) ) ) | |
1142 | last_received = last_received->next; | |
1143 | /* last_received now points to the last Received: or Resent-* header | |
1144 | in an uninterrupted chain of those header types (seen from the beginning | |
1145 | of all headers. Our current header must follow it. */ | |
1146 | h->next = last_received->next; | |
1147 | last_received->next = h; | |
8e669ac1 | 1148 | DEBUG(D_receive|D_acl) debug_printf(" (before any non-Received: or Resent-*: header)"); |
8523533c TK |
1149 | break; |
1150 | ||
059ec3d9 PH |
1151 | default: |
1152 | h->next = NULL; | |
1153 | header_last->next = h; | |
1154 | break; | |
1155 | } | |
1156 | ||
1157 | if (h->next == NULL) header_last = h; | |
1158 | ||
1159 | /* Check for one of the known header types (From:, To:, etc.) though in | |
1160 | practice most added headers are going to be "other". Lower case | |
1161 | identification letters are never stored with the header; they are used | |
1162 | for existence tests when messages are received. So discard any lower case | |
1163 | flag values. */ | |
1164 | ||
1165 | h->type = header_checkname(h, FALSE); | |
1166 | if (h->type >= 'a') h->type = htype_other; | |
1167 | ||
1168 | DEBUG(D_receive|D_acl) debug_printf(" %s", header_last->text); | |
1169 | } | |
1170 | ||
71fafd95 | 1171 | acl_added_headers = NULL; |
059ec3d9 PH |
1172 | DEBUG(D_receive|D_acl) debug_printf(">>\n"); |
1173 | } | |
1174 | ||
1175 | ||
1176 | ||
1177 | /************************************************* | |
1178 | * Add host information for log line * | |
1179 | *************************************************/ | |
1180 | ||
1181 | /* Called for acceptance and rejecting log lines. This adds information about | |
1182 | the calling host to a string that is being built dynamically. | |
1183 | ||
1184 | Arguments: | |
1185 | s the dynamic string | |
1186 | sizeptr points to the size variable | |
1187 | ptrptr points to the pointer variable | |
1188 | ||
1189 | Returns: the extended string | |
1190 | */ | |
1191 | ||
1192 | static uschar * | |
fc16abb4 | 1193 | add_host_info_for_log(uschar * s, int * sizeptr, int * ptrptr) |
059ec3d9 | 1194 | { |
fc16abb4 | 1195 | if (sender_fullhost) |
059ec3d9 | 1196 | { |
fc16abb4 JH |
1197 | if (LOGGING(dnssec) && sender_host_dnssec) /*XXX sender_helo_dnssec? */ |
1198 | s = string_cat(s, sizeptr, ptrptr, US" DS"); | |
059ec3d9 | 1199 | s = string_append(s, sizeptr, ptrptr, 2, US" H=", sender_fullhost); |
6c6d6e48 | 1200 | if (LOGGING(incoming_interface) && interface_address != NULL) |
059ec3d9 | 1201 | { |
fc16abb4 JH |
1202 | s = string_cat(s, sizeptr, ptrptr, |
1203 | string_sprintf(" I=[%s]:%d", interface_address, interface_port)); | |
059ec3d9 PH |
1204 | } |
1205 | } | |
1206 | if (sender_ident != NULL) | |
1207 | s = string_append(s, sizeptr, ptrptr, 2, US" U=", sender_ident); | |
1208 | if (received_protocol != NULL) | |
1209 | s = string_append(s, sizeptr, ptrptr, 2, US" P=", received_protocol); | |
1210 | return s; | |
1211 | } | |
1212 | ||
1213 | ||
1214 | ||
63955bf2 | 1215 | #ifdef WITH_CONTENT_SCAN |
059ec3d9 | 1216 | |
54cdb463 PH |
1217 | /************************************************* |
1218 | * Run the MIME ACL on a message * | |
1219 | *************************************************/ | |
1220 | ||
1221 | /* This code is in a subroutine so that it can be used for both SMTP | |
1222 | and non-SMTP messages. It is called with a non-NULL ACL pointer. | |
1223 | ||
1224 | Arguments: | |
1225 | acl The ACL to run (acl_smtp_mime or acl_not_smtp_mime) | |
1226 | smtp_yield_ptr Set FALSE to kill messages after dropped connection | |
1227 | smtp_reply_ptr Where SMTP reply is being built | |
1228 | blackholed_by_ptr Where "blackholed by" message is being built | |
1229 | ||
1230 | Returns: TRUE to carry on; FALSE to abandon the message | |
1231 | */ | |
1232 | ||
1233 | static BOOL | |
1234 | run_mime_acl(uschar *acl, BOOL *smtp_yield_ptr, uschar **smtp_reply_ptr, | |
1235 | uschar **blackholed_by_ptr) | |
1236 | { | |
1237 | FILE *mbox_file; | |
1238 | uschar rfc822_file_path[2048]; | |
1239 | unsigned long mbox_size; | |
1240 | header_line *my_headerlist; | |
1241 | uschar *user_msg, *log_msg; | |
1242 | int mime_part_count_buffer = -1; | |
7156b1ef | 1243 | int rc = OK; |
54cdb463 PH |
1244 | |
1245 | memset(CS rfc822_file_path,0,2048); | |
1246 | ||
1247 | /* check if it is a MIME message */ | |
1248 | my_headerlist = header_list; | |
4e88a19f PH |
1249 | while (my_headerlist != NULL) |
1250 | { | |
54cdb463 | 1251 | /* skip deleted headers */ |
4e88a19f PH |
1252 | if (my_headerlist->type == '*') |
1253 | { | |
54cdb463 PH |
1254 | my_headerlist = my_headerlist->next; |
1255 | continue; | |
4e88a19f PH |
1256 | } |
1257 | if (strncmpic(my_headerlist->text, US"Content-Type:", 13) == 0) | |
1258 | { | |
54cdb463 PH |
1259 | DEBUG(D_receive) debug_printf("Found Content-Type: header - executing acl_smtp_mime.\n"); |
1260 | goto DO_MIME_ACL; | |
4e88a19f | 1261 | } |
54cdb463 | 1262 | my_headerlist = my_headerlist->next; |
4e88a19f | 1263 | } |
54cdb463 PH |
1264 | |
1265 | DEBUG(D_receive) debug_printf("No Content-Type: header - presumably not a MIME message.\n"); | |
1266 | return TRUE; | |
1267 | ||
1268 | DO_MIME_ACL: | |
1269 | /* make sure the eml mbox file is spooled up */ | |
8544e77a | 1270 | mbox_file = spool_mbox(&mbox_size, NULL); |
54cdb463 PH |
1271 | if (mbox_file == NULL) { |
1272 | /* error while spooling */ | |
1273 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1274 | "acl_smtp_mime: error while creating mbox spool file, message temporarily rejected."); | |
1275 | Uunlink(spool_name); | |
1276 | unspool_mbox(); | |
6f0c431a PP |
1277 | #ifdef EXPERIMENTAL_DCC |
1278 | dcc_ok = 0; | |
1279 | #endif | |
a5bd321b | 1280 | smtp_respond(US"451", 3, TRUE, US"temporary local problem"); |
54cdb463 PH |
1281 | message_id[0] = 0; /* Indicate no message accepted */ |
1282 | *smtp_reply_ptr = US""; /* Indicate reply already sent */ | |
1283 | return FALSE; /* Indicate skip to end of receive function */ | |
1284 | }; | |
1285 | ||
1286 | mime_is_rfc822 = 0; | |
1287 | ||
1288 | MIME_ACL_CHECK: | |
1289 | mime_part_count = -1; | |
1290 | rc = mime_acl_check(acl, mbox_file, NULL, &user_msg, &log_msg); | |
f1e894f3 | 1291 | (void)fclose(mbox_file); |
54cdb463 | 1292 | |
4e88a19f PH |
1293 | if (Ustrlen(rfc822_file_path) > 0) |
1294 | { | |
54cdb463 PH |
1295 | mime_part_count = mime_part_count_buffer; |
1296 | ||
4e88a19f PH |
1297 | if (unlink(CS rfc822_file_path) == -1) |
1298 | { | |
54cdb463 PH |
1299 | log_write(0, LOG_PANIC, |
1300 | "acl_smtp_mime: can't unlink RFC822 spool file, skipping."); | |
1301 | goto END_MIME_ACL; | |
4e88a19f PH |
1302 | } |
1303 | } | |
54cdb463 PH |
1304 | |
1305 | /* check if we must check any message/rfc822 attachments */ | |
4e88a19f PH |
1306 | if (rc == OK) |
1307 | { | |
54cdb463 | 1308 | uschar temp_path[1024]; |
e8bc7fca JH |
1309 | struct dirent * entry; |
1310 | DIR * tempdir; | |
54cdb463 | 1311 | |
e8bc7fca JH |
1312 | (void) string_format(temp_path, sizeof(temp_path), "%s/scan/%s", |
1313 | spool_directory, message_id); | |
54cdb463 | 1314 | |
4e88a19f | 1315 | tempdir = opendir(CS temp_path); |
e8bc7fca | 1316 | for (;;) |
4e88a19f | 1317 | { |
e8bc7fca JH |
1318 | if (!(entry = readdir(tempdir))) |
1319 | break; | |
1320 | if (strncmpic(US entry->d_name, US"__rfc822_", 9) == 0) | |
4e88a19f | 1321 | { |
e8bc7fca JH |
1322 | (void) string_format(rfc822_file_path, sizeof(rfc822_file_path), |
1323 | "%s/scan/%s/%s", spool_directory, message_id, entry->d_name); | |
1324 | debug_printf("RFC822 attachment detected: running MIME ACL for '%s'\n", | |
1325 | rfc822_file_path); | |
4e88a19f PH |
1326 | break; |
1327 | } | |
e8bc7fca | 1328 | } |
4e88a19f | 1329 | closedir(tempdir); |
54cdb463 | 1330 | |
e8bc7fca | 1331 | if (entry) |
4e88a19f | 1332 | { |
e8bc7fca | 1333 | if ((mbox_file = Ufopen(rfc822_file_path, "rb"))) |
4e88a19f | 1334 | { |
e8bc7fca JH |
1335 | /* set RFC822 expansion variable */ |
1336 | mime_is_rfc822 = 1; | |
1337 | mime_part_count_buffer = mime_part_count; | |
1338 | goto MIME_ACL_CHECK; | |
4e88a19f | 1339 | } |
e8bc7fca JH |
1340 | log_write(0, LOG_PANIC, |
1341 | "acl_smtp_mime: can't open RFC822 spool file, skipping."); | |
1342 | unlink(CS rfc822_file_path); | |
4e88a19f PH |
1343 | } |
1344 | } | |
54cdb463 PH |
1345 | |
1346 | END_MIME_ACL: | |
578d43dc | 1347 | add_acl_headers(ACL_WHERE_MIME, US"MIME"); |
54cdb463 PH |
1348 | if (rc == DISCARD) |
1349 | { | |
1350 | recipients_count = 0; | |
1351 | *blackholed_by_ptr = US"MIME ACL"; | |
1352 | } | |
1353 | else if (rc != OK) | |
1354 | { | |
1355 | Uunlink(spool_name); | |
1356 | unspool_mbox(); | |
6f0c431a PP |
1357 | #ifdef EXPERIMENTAL_DCC |
1358 | dcc_ok = 0; | |
1359 | #endif | |
4f6ae5c3 JH |
1360 | if ( smtp_input |
1361 | && smtp_handle_acl_fail(ACL_WHERE_MIME, rc, user_msg, log_msg) != 0) | |
1362 | { | |
85ffcba6 | 1363 | *smtp_yield_ptr = FALSE; /* No more messages after dropped connection */ |
f4c1088b | 1364 | *smtp_reply_ptr = US""; /* Indicate reply already sent */ |
4f6ae5c3 | 1365 | } |
54cdb463 PH |
1366 | message_id[0] = 0; /* Indicate no message accepted */ |
1367 | return FALSE; /* Cause skip to end of receive function */ | |
4e88a19f | 1368 | } |
54cdb463 PH |
1369 | |
1370 | return TRUE; | |
1371 | } | |
1372 | ||
63955bf2 | 1373 | #endif /* WITH_CONTENT_SCAN */ |
54cdb463 PH |
1374 | |
1375 | ||
e4bdf652 JH |
1376 | |
1377 | void | |
1378 | received_header_gen(void) | |
1379 | { | |
1380 | uschar *received; | |
1381 | uschar *timestamp; | |
1382 | header_line *received_header= header_list; | |
1383 | ||
1384 | timestamp = expand_string(US"${tod_full}"); | |
1385 | if (recipients_count == 1) received_for = recipients_list[0].address; | |
1386 | received = expand_string(received_header_text); | |
1387 | received_for = NULL; | |
1388 | ||
d4ff61d1 | 1389 | if (!received) |
e4bdf652 JH |
1390 | { |
1391 | if(spool_name[0] != 0) | |
1392 | Uunlink(spool_name); /* Lose the data file */ | |
1393 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Expansion of \"%s\" " | |
1394 | "(received_header_text) failed: %s", string_printing(received_header_text), | |
1395 | expand_string_message); | |
1396 | } | |
1397 | ||
1398 | /* The first element on the header chain is reserved for the Received header, | |
1399 | so all we have to do is fill in the text pointer, and set the type. However, if | |
1400 | the result of the expansion is an empty string, we leave the header marked as | |
1401 | "old" so as to refrain from adding a Received header. */ | |
1402 | ||
1403 | if (received[0] == 0) | |
1404 | { | |
1405 | received_header->text = string_sprintf("Received: ; %s\n", timestamp); | |
1406 | received_header->type = htype_old; | |
1407 | } | |
1408 | else | |
1409 | { | |
1410 | received_header->text = string_sprintf("%s; %s\n", received, timestamp); | |
1411 | received_header->type = htype_received; | |
1412 | } | |
1413 | ||
1414 | received_header->slen = Ustrlen(received_header->text); | |
1415 | ||
1416 | DEBUG(D_receive) debug_printf(">>Generated Received: header line\n%c %s", | |
1417 | received_header->type, received_header->text); | |
1418 | } | |
1419 | ||
1420 | ||
1421 | ||
059ec3d9 PH |
1422 | /************************************************* |
1423 | * Receive message * | |
1424 | *************************************************/ | |
1425 | ||
1426 | /* Receive a message on the given input, and put it into a pair of spool files. | |
1427 | Either a non-null list of recipients, or the extract flag will be true, or | |
1428 | both. The flag sender_local is true for locally generated messages. The flag | |
1429 | submission_mode is true if an ACL has obeyed "control = submission". The flag | |
8800895a | 1430 | suppress_local_fixups is true if an ACL has obeyed "control = |
f4ee74ac PP |
1431 | suppress_local_fixups" or -G was passed on the command-line. |
1432 | The flag smtp_input is true if the message is to be | |
8800895a PH |
1433 | handled using SMTP conventions about termination and lines starting with dots. |
1434 | For non-SMTP messages, dot_ends is true for dot-terminated messages. | |
059ec3d9 PH |
1435 | |
1436 | If a message was successfully read, message_id[0] will be non-zero. | |
1437 | ||
1438 | The general actions of this function are: | |
1439 | ||
1440 | . Read the headers of the message (if any) into a chain of store | |
1441 | blocks. | |
1442 | ||
1443 | . If there is a "sender:" header and the message is locally originated, | |
69358f02 PH |
1444 | throw it away, unless the caller is trusted, or unless |
1445 | active_local_sender_retain is set - which can only happen if | |
1446 | active_local_from_check is false. | |
059ec3d9 PH |
1447 | |
1448 | . If recipients are to be extracted from the message, build the | |
1449 | recipients list from the headers, removing any that were on the | |
1450 | original recipients list (unless extract_addresses_remove_arguments is | |
1451 | false), and at the same time, remove any bcc header that may be present. | |
1452 | ||
1453 | . Get the spool file for the data, sort out its unique name, open | |
1454 | and lock it (but don't give it the name yet). | |
1455 | ||
1456 | . Generate a "Message-Id" header if the message doesn't have one, for | |
1457 | locally-originated messages. | |
1458 | ||
1459 | . Generate a "Received" header. | |
1460 | ||
1461 | . Ensure the recipients list is fully qualified and rewritten if necessary. | |
1462 | ||
1463 | . If there are any rewriting rules, apply them to the sender address | |
1464 | and also to the headers. | |
1465 | ||
1466 | . If there is no from: header, generate one, for locally-generated messages | |
1467 | and messages in "submission mode" only. | |
1468 | ||
1469 | . If the sender is local, check that from: is correct, and if not, generate | |
1470 | a Sender: header, unless message comes from a trusted caller, or this | |
69358f02 | 1471 | feature is disabled by active_local_from_check being false. |
059ec3d9 PH |
1472 | |
1473 | . If there is no "date" header, generate one, for locally-originated | |
1474 | or submission mode messages only. | |
1475 | ||
1476 | . Copy the rest of the input, or up to a terminating "." if in SMTP or | |
1477 | dot_ends mode, to the data file. Leave it open, to hold the lock. | |
1478 | ||
1479 | . Write the envelope and the headers to a new file. | |
1480 | ||
1481 | . Set the name for the header file; close it. | |
1482 | ||
1483 | . Set the name for the data file; close it. | |
1484 | ||
1485 | Because this function can potentially be called many times in a single | |
1486 | SMTP connection, all store should be got by store_get(), so that it will be | |
1487 | automatically retrieved after the message is accepted. | |
1488 | ||
1489 | FUDGE: It seems that sites on the net send out messages with just LF | |
1490 | terminators, despite the warnings in the RFCs, and other MTAs handle this. So | |
1491 | we make the CRs optional in all cases. | |
1492 | ||
1493 | July 2003: Bare CRs in messages, especially in header lines, cause trouble. A | |
1494 | new regime is now in place in which bare CRs in header lines are turned into LF | |
1495 | followed by a space, so as not to terminate the header line. | |
1496 | ||
1497 | February 2004: A bare LF in a header line in a message whose first line was | |
1498 | terminated by CRLF is treated in the same way as a bare CR. | |
1499 | ||
1500 | Arguments: | |
1501 | extract_recip TRUE if recipients are to be extracted from the message's | |
1502 | headers | |
1503 | ||
1504 | Returns: TRUE there are more messages to be read (SMTP input) | |
1505 | FALSE there are no more messages to be read (non-SMTP input | |
1506 | or SMTP connection collapsed, or other failure) | |
1507 | ||
1508 | When reading a message for filter testing, the returned value indicates | |
1509 | whether the headers (which is all that is read) were terminated by '.' or | |
1510 | not. */ | |
1511 | ||
1512 | BOOL | |
1513 | receive_msg(BOOL extract_recip) | |
1514 | { | |
7156b1ef NM |
1515 | int i; |
1516 | int rc = FAIL; | |
059ec3d9 PH |
1517 | int msg_size = 0; |
1518 | int process_info_len = Ustrlen(process_info); | |
1519 | int error_rc = (error_handling == ERRORS_SENDER)? | |
1520 | errors_sender_rc : EXIT_FAILURE; | |
1521 | int header_size = 256; | |
1522 | int start, end, domain, size, sptr; | |
1523 | int id_resolution; | |
1524 | int had_zero = 0; | |
d677b2f2 | 1525 | int prevlines_length = 0; |
059ec3d9 PH |
1526 | |
1527 | register int ptr = 0; | |
1528 | ||
1529 | BOOL contains_resent_headers = FALSE; | |
1530 | BOOL extracted_ignored = FALSE; | |
1531 | BOOL first_line_ended_crlf = TRUE_UNSET; | |
1532 | BOOL smtp_yield = TRUE; | |
1533 | BOOL yield = FALSE; | |
1534 | ||
1535 | BOOL resents_exist = FALSE; | |
1536 | uschar *resent_prefix = US""; | |
1537 | uschar *blackholed_by = NULL; | |
04f7d5b9 | 1538 | uschar *blackhole_log_msg = US""; |
c5430c20 | 1539 | enum {NOT_TRIED, TMP_REJ, PERM_REJ, ACCEPTED} cutthrough_done = NOT_TRIED; |
059ec3d9 PH |
1540 | |
1541 | flock_t lock_data; | |
1542 | error_block *bad_addresses = NULL; | |
1543 | ||
1544 | uschar *frozen_by = NULL; | |
1545 | uschar *queued_by = NULL; | |
1546 | ||
1547 | uschar *errmsg, *s; | |
1548 | struct stat statbuf; | |
1549 | ||
4e88a19f | 1550 | /* Final message to give to SMTP caller, and messages from ACLs */ |
059ec3d9 PH |
1551 | |
1552 | uschar *smtp_reply = NULL; | |
4e88a19f | 1553 | uschar *user_msg, *log_msg; |
059ec3d9 PH |
1554 | |
1555 | /* Working header pointers */ | |
1556 | ||
1557 | header_line *h, *next; | |
1558 | ||
2cbb4081 | 1559 | /* Flags for noting the existence of certain headers (only one left) */ |
059ec3d9 PH |
1560 | |
1561 | BOOL date_header_exists = FALSE; | |
1562 | ||
1563 | /* Pointers to receive the addresses of headers whose contents we need. */ | |
1564 | ||
1565 | header_line *from_header = NULL; | |
1566 | header_line *subject_header = NULL; | |
1567 | header_line *msgid_header = NULL; | |
1568 | header_line *received_header; | |
1569 | ||
4840604e TL |
1570 | #ifdef EXPERIMENTAL_DMARC |
1571 | int dmarc_up = 0; | |
1572 | #endif /* EXPERIMENTAL_DMARC */ | |
1573 | ||
059ec3d9 PH |
1574 | /* Variables for use when building the Received: header. */ |
1575 | ||
059ec3d9 PH |
1576 | uschar *timestamp; |
1577 | int tslen; | |
1578 | ||
1579 | /* Release any open files that might have been cached while preparing to | |
1580 | accept the message - e.g. by verifying addresses - because reading a message | |
1581 | might take a fair bit of real time. */ | |
1582 | ||
1583 | search_tidyup(); | |
1584 | ||
e4bdf652 JH |
1585 | /* Extracting the recipient list from an input file is incompatible with |
1586 | cutthrough delivery with the no-spool option. It shouldn't be possible | |
817d9f57 | 1587 | to set up the combination, but just in case kill any ongoing connection. */ |
e4bdf652 | 1588 | if (extract_recip || !smtp_input) |
2e5b33cd | 1589 | cancel_cutthrough_connection("not smtp input"); |
e4bdf652 | 1590 | |
059ec3d9 PH |
1591 | /* Initialize the chain of headers by setting up a place-holder for Received: |
1592 | header. Temporarily mark it as "old", i.e. not to be used. We keep header_last | |
1593 | pointing to the end of the chain to make adding headers simple. */ | |
1594 | ||
1595 | received_header = header_list = header_last = store_get(sizeof(header_line)); | |
1596 | header_list->next = NULL; | |
1597 | header_list->type = htype_old; | |
1598 | header_list->text = NULL; | |
1599 | header_list->slen = 0; | |
1600 | ||
1601 | /* Control block for the next header to be read. */ | |
1602 | ||
1603 | next = store_get(sizeof(header_line)); | |
1604 | next->text = store_get(header_size); | |
1605 | ||
1606 | /* Initialize message id to be null (indicating no message read), and the | |
1607 | header names list to be the normal list. Indicate there is no data file open | |
1608 | yet, initialize the size and warning count, and deal with no size limit. */ | |
1609 | ||
1610 | message_id[0] = 0; | |
1611 | data_file = NULL; | |
1612 | data_fd = -1; | |
41313d92 | 1613 | spool_name = US""; |
059ec3d9 PH |
1614 | message_size = 0; |
1615 | warning_count = 0; | |
d677b2f2 | 1616 | received_count = 1; /* For the one we will add */ |
059ec3d9 PH |
1617 | |
1618 | if (thismessage_size_limit <= 0) thismessage_size_limit = INT_MAX; | |
1619 | ||
2e0c1448 | 1620 | /* While reading the message, the following counts are computed. */ |
059ec3d9 | 1621 | |
d677b2f2 PH |
1622 | message_linecount = body_linecount = body_zerocount = |
1623 | max_received_linelength = 0; | |
059ec3d9 | 1624 | |
80a47a2c | 1625 | #ifndef DISABLE_DKIM |
e983e85a JH |
1626 | /* Call into DKIM to set up the context. In CHUNKING mode |
1627 | we clear the dot-stuffing flag */ | |
1628 | if (smtp_input && !smtp_batched_input && !dkim_disable_verify) | |
1629 | dkim_exim_verify_init(chunking_state <= CHUNKING_OFFERED); | |
fb2274d4 TK |
1630 | #endif |
1631 | ||
4840604e TL |
1632 | #ifdef EXPERIMENTAL_DMARC |
1633 | /* initialize libopendmarc */ | |
1634 | dmarc_up = dmarc_init(); | |
1635 | #endif | |
1636 | ||
059ec3d9 PH |
1637 | /* Remember the time of reception. Exim uses time+pid for uniqueness of message |
1638 | ids, and fractions of a second are required. See the comments that precede the | |
1639 | message id creation below. */ | |
1640 | ||
1641 | (void)gettimeofday(&message_id_tv, NULL); | |
1642 | ||
1643 | /* For other uses of the received time we can operate with granularity of one | |
1644 | second, and for that we use the global variable received_time. This is for | |
1645 | things like ultimate message timeouts. */ | |
1646 | ||
1647 | received_time = message_id_tv.tv_sec; | |
1648 | ||
1649 | /* If SMTP input, set the special handler for timeouts. The alarm() calls | |
1650 | happen in the smtp_getc() function when it refills its buffer. */ | |
1651 | ||
1652 | if (smtp_input) os_non_restarting_signal(SIGALRM, data_timeout_handler); | |
1653 | ||
1654 | /* If not SMTP input, timeout happens only if configured, and we just set a | |
1655 | single timeout for the whole message. */ | |
1656 | ||
1657 | else if (receive_timeout > 0) | |
1658 | { | |
1659 | os_non_restarting_signal(SIGALRM, data_timeout_handler); | |
1660 | alarm(receive_timeout); | |
1661 | } | |
1662 | ||
1663 | /* SIGTERM and SIGINT are caught always. */ | |
1664 | ||
1665 | signal(SIGTERM, data_sigterm_sigint_handler); | |
1666 | signal(SIGINT, data_sigterm_sigint_handler); | |
1667 | ||
1668 | /* Header lines in messages are not supposed to be very long, though when | |
1669 | unfolded, to: and cc: headers can take up a lot of store. We must also cope | |
1670 | with the possibility of junk being thrown at us. Start by getting 256 bytes for | |
1671 | storing the header, and extend this as necessary using string_cat(). | |
1672 | ||
1673 | To cope with total lunacies, impose an upper limit on the length of the header | |
1674 | section of the message, as otherwise the store will fill up. We must also cope | |
1675 | with the possibility of binary zeros in the data. Hence we cannot use fgets(). | |
1676 | Folded header lines are joined into one string, leaving the '\n' characters | |
1677 | inside them, so that writing them out reproduces the input. | |
1678 | ||
1679 | Loop for each character of each header; the next structure for chaining the | |
1680 | header is set up already, with ptr the offset of the next character in | |
1681 | next->text. */ | |
1682 | ||
1683 | for (;;) | |
1684 | { | |
80a47a2c | 1685 | int ch = (receive_getc)(); |
059ec3d9 PH |
1686 | |
1687 | /* If we hit EOF on a SMTP connection, it's an error, since incoming | |
1688 | SMTP must have a correct "." terminator. */ | |
1689 | ||
1690 | if (ch == EOF && smtp_input /* && !smtp_batched_input */) | |
1691 | { | |
1692 | smtp_reply = handle_lost_connection(US" (header)"); | |
1693 | smtp_yield = FALSE; | |
1694 | goto TIDYUP; /* Skip to end of function */ | |
1695 | } | |
1696 | ||
1697 | /* See if we are at the current header's size limit - there must be at least | |
1698 | four bytes left. This allows for the new character plus a zero, plus two for | |
1699 | extra insertions when we are playing games with dots and carriage returns. If | |
1700 | we are at the limit, extend the text buffer. This could have been done | |
1701 | automatically using string_cat() but because this is a tightish loop storing | |
1702 | only one character at a time, we choose to do it inline. Normally | |
1703 | store_extend() will be able to extend the block; only at the end of a big | |
1704 | store block will a copy be needed. To handle the case of very long headers | |
1705 | (and sometimes lunatic messages can have ones that are 100s of K long) we | |
1706 | call store_release() for strings that have been copied - if the string is at | |
1707 | the start of a block (and therefore the only thing in it, because we aren't | |
1708 | doing any other gets), the block gets freed. We can only do this because we | |
1709 | know there are no other calls to store_get() going on. */ | |
1710 | ||
1711 | if (ptr >= header_size - 4) | |
1712 | { | |
1713 | int oldsize = header_size; | |
1714 | /* header_size += 256; */ | |
1715 | header_size *= 2; | |
1716 | if (!store_extend(next->text, oldsize, header_size)) | |
1717 | { | |
1718 | uschar *newtext = store_get(header_size); | |
1719 | memcpy(newtext, next->text, ptr); | |
1720 | store_release(next->text); | |
1721 | next->text = newtext; | |
1722 | } | |
1723 | } | |
1724 | ||
1725 | /* Cope with receiving a binary zero. There is dispute about whether | |
1726 | these should be allowed in RFC 822 messages. The middle view is that they | |
1727 | should not be allowed in headers, at least. Exim takes this attitude at | |
1728 | the moment. We can't just stomp on them here, because we don't know that | |
1729 | this line is a header yet. Set a flag to cause scanning later. */ | |
1730 | ||
1731 | if (ch == 0) had_zero++; | |
1732 | ||
1733 | /* Test for termination. Lines in remote SMTP are terminated by CRLF, while | |
1734 | those from data files use just LF. Treat LF in local SMTP input as a | |
1735 | terminator too. Treat EOF as a line terminator always. */ | |
1736 | ||
1737 | if (ch == EOF) goto EOL; | |
1738 | ||
1739 | /* FUDGE: There are sites out there that don't send CRs before their LFs, and | |
1740 | other MTAs accept this. We are therefore forced into this "liberalisation" | |
1741 | too, so we accept LF as a line terminator whatever the source of the message. | |
1742 | However, if the first line of the message ended with a CRLF, we treat a bare | |
1743 | LF specially by inserting a white space after it to ensure that the header | |
1744 | line is not terminated. */ | |
1745 | ||
1746 | if (ch == '\n') | |
1747 | { | |
1748 | if (first_line_ended_crlf == TRUE_UNSET) first_line_ended_crlf = FALSE; | |
80a47a2c | 1749 | else if (first_line_ended_crlf) receive_ungetc(' '); |
059ec3d9 PH |
1750 | goto EOL; |
1751 | } | |
1752 | ||
1753 | /* This is not the end of the line. If this is SMTP input and this is | |
1754 | the first character in the line and it is a "." character, ignore it. | |
1755 | This implements the dot-doubling rule, though header lines starting with | |
1756 | dots aren't exactly common. They are legal in RFC 822, though. If the | |
1757 | following is CRLF or LF, this is the line that that terminates the | |
1758 | entire message. We set message_ended to indicate this has happened (to | |
1759 | prevent further reading), and break out of the loop, having freed the | |
1760 | empty header, and set next = NULL to indicate no data line. */ | |
1761 | ||
1762 | if (ptr == 0 && ch == '.' && (smtp_input || dot_ends)) | |
1763 | { | |
80a47a2c | 1764 | ch = (receive_getc)(); |
059ec3d9 PH |
1765 | if (ch == '\r') |
1766 | { | |
80a47a2c | 1767 | ch = (receive_getc)(); |
059ec3d9 PH |
1768 | if (ch != '\n') |
1769 | { | |
80a47a2c | 1770 | receive_ungetc(ch); |
059ec3d9 PH |
1771 | ch = '\r'; /* Revert to CR */ |
1772 | } | |
1773 | } | |
1774 | if (ch == '\n') | |
1775 | { | |
1776 | message_ended = END_DOT; | |
1777 | store_reset(next); | |
1778 | next = NULL; | |
1779 | break; /* End character-reading loop */ | |
1780 | } | |
1781 | ||
1782 | /* For non-SMTP input, the dot at the start of the line was really a data | |
1783 | character. What is now in ch is the following character. We guaranteed | |
1784 | enough space for this above. */ | |
1785 | ||
1786 | if (!smtp_input) | |
1787 | { | |
1788 | next->text[ptr++] = '.'; | |
1789 | message_size++; | |
1790 | } | |
1791 | } | |
1792 | ||
1793 | /* If CR is immediately followed by LF, end the line, ignoring the CR, and | |
1794 | remember this case if this is the first line ending. */ | |
1795 | ||
1796 | if (ch == '\r') | |
1797 | { | |
80a47a2c | 1798 | ch = (receive_getc)(); |
059ec3d9 PH |
1799 | if (ch == '\n') |
1800 | { | |
1801 | if (first_line_ended_crlf == TRUE_UNSET) first_line_ended_crlf = TRUE; | |
1802 | goto EOL; | |
1803 | } | |
1804 | ||
1805 | /* Otherwise, put back the character after CR, and turn the bare CR | |
1806 | into LF SP. */ | |
1807 | ||
80a47a2c | 1808 | ch = (receive_ungetc)(ch); |
059ec3d9 PH |
1809 | next->text[ptr++] = '\n'; |
1810 | message_size++; | |
1811 | ch = ' '; | |
1812 | } | |
1813 | ||
1814 | /* We have a data character for the header line. */ | |
1815 | ||
1816 | next->text[ptr++] = ch; /* Add to buffer */ | |
1817 | message_size++; /* Total message size so far */ | |
1818 | ||
1819 | /* Handle failure due to a humungously long header section. The >= allows | |
1820 | for the terminating \n. Add what we have so far onto the headers list so | |
1821 | that it gets reflected in any error message, and back up the just-read | |
1822 | character. */ | |
1823 | ||
1824 | if (message_size >= header_maxsize) | |
1825 | { | |
1826 | next->text[ptr] = 0; | |
1827 | next->slen = ptr; | |
1828 | next->type = htype_other; | |
1829 | next->next = NULL; | |
1830 | header_last->next = next; | |
1831 | header_last = next; | |
1832 | ||
1833 | log_write(0, LOG_MAIN, "ridiculously long message header received from " | |
1834 | "%s (more than %d characters): message abandoned", | |
1835 | sender_host_unknown? sender_ident : sender_fullhost, header_maxsize); | |
1836 | ||
1837 | if (smtp_input) | |
1838 | { | |
1839 | smtp_reply = US"552 Message header is ridiculously long"; | |
1840 | receive_swallow_smtp(); | |
1841 | goto TIDYUP; /* Skip to end of function */ | |
1842 | } | |
1843 | ||
1844 | else | |
1845 | { | |
1846 | give_local_error(ERRMESS_VLONGHEADER, | |
1847 | string_sprintf("message header longer than %d characters received: " | |
1848 | "message not accepted", header_maxsize), US"", error_rc, stdin, | |
1849 | header_list->next); | |
1850 | /* Does not return */ | |
1851 | } | |
1852 | } | |
1853 | ||
1854 | continue; /* With next input character */ | |
1855 | ||
1856 | /* End of header line reached */ | |
1857 | ||
1858 | EOL: | |
2e0c1448 PH |
1859 | |
1860 | /* Keep track of lines for BSMTP errors and overall message_linecount. */ | |
1861 | ||
1862 | receive_linecount++; | |
1863 | message_linecount++; | |
059ec3d9 | 1864 | |
d677b2f2 PH |
1865 | /* Keep track of maximum line length */ |
1866 | ||
1867 | if (ptr - prevlines_length > max_received_linelength) | |
1868 | max_received_linelength = ptr - prevlines_length; | |
1869 | prevlines_length = ptr + 1; | |
1870 | ||
059ec3d9 PH |
1871 | /* Now put in the terminating newline. There is always space for |
1872 | at least two more characters. */ | |
1873 | ||
1874 | next->text[ptr++] = '\n'; | |
1875 | message_size++; | |
1876 | ||
1877 | /* A blank line signals the end of the headers; release the unwanted | |
1878 | space and set next to NULL to indicate this. */ | |
1879 | ||
1880 | if (ptr == 1) | |
1881 | { | |
1882 | store_reset(next); | |
1883 | next = NULL; | |
1884 | break; | |
1885 | } | |
1886 | ||
1887 | /* There is data in the line; see if the next input character is a | |
1888 | whitespace character. If it is, we have a continuation of this header line. | |
1889 | There is always space for at least one character at this point. */ | |
1890 | ||
1891 | if (ch != EOF) | |
1892 | { | |
80a47a2c | 1893 | int nextch = (receive_getc)(); |
059ec3d9 PH |
1894 | if (nextch == ' ' || nextch == '\t') |
1895 | { | |
1896 | next->text[ptr++] = nextch; | |
1897 | message_size++; | |
1898 | continue; /* Iterate the loop */ | |
1899 | } | |
80a47a2c | 1900 | else if (nextch != EOF) (receive_ungetc)(nextch); /* For next time */ |
059ec3d9 PH |
1901 | else ch = EOF; /* Cause main loop to exit at end */ |
1902 | } | |
1903 | ||
1904 | /* We have got to the real line end. Terminate the string and release store | |
1905 | beyond it. If it turns out to be a real header, internal binary zeros will | |
1906 | be squashed later. */ | |
1907 | ||
1908 | next->text[ptr] = 0; | |
1909 | next->slen = ptr; | |
1910 | store_reset(next->text + ptr + 1); | |
1911 | ||
1912 | /* Check the running total size against the overall message size limit. We | |
1913 | don't expect to fail here, but if the overall limit is set less than MESSAGE_ | |
1914 | MAXSIZE and a big header is sent, we want to catch it. Just stop reading | |
1915 | headers - the code to read the body will then also hit the buffer. */ | |
1916 | ||
1917 | if (message_size > thismessage_size_limit) break; | |
1918 | ||
1919 | /* A line that is not syntactically correct for a header also marks | |
1920 | the end of the headers. In this case, we leave next containing the | |
1921 | first data line. This might actually be several lines because of the | |
1922 | continuation logic applied above, but that doesn't matter. | |
1923 | ||
1924 | It turns out that smail, and presumably sendmail, accept leading lines | |
1925 | of the form | |
1926 | ||
1927 | From ph10 Fri Jan 5 12:35 GMT 1996 | |
1928 | ||
1929 | in messages. The "mail" command on Solaris 2 sends such lines. I cannot | |
1930 | find any documentation of this, but for compatibility it had better be | |
1931 | accepted. Exim restricts it to the case of non-smtp messages, and | |
1932 | treats it as an alternative to the -f command line option. Thus it is | |
1933 | ignored except for trusted users or filter testing. Otherwise it is taken | |
1934 | as the sender address, unless -f was used (sendmail compatibility). | |
1935 | ||
1936 | It further turns out that some UUCPs generate the From_line in a different | |
1937 | format, e.g. | |
1938 | ||
1939 | From ph10 Fri, 7 Jan 97 14:00:00 GMT | |
1940 | ||
1941 | The regex for matching these things is now capable of recognizing both | |
1942 | formats (including 2- and 4-digit years in the latter). In fact, the regex | |
1943 | is now configurable, as is the expansion string to fish out the sender. | |
1944 | ||
1945 | Even further on it has been discovered that some broken clients send | |
1946 | these lines in SMTP messages. There is now an option to ignore them from | |
1947 | specified hosts or networks. Sigh. */ | |
1948 | ||
1949 | if (header_last == header_list && | |
1950 | (!smtp_input | |
1951 | || | |
1952 | (sender_host_address != NULL && | |
1953 | verify_check_host(&ignore_fromline_hosts) == OK) | |
1954 | || | |
1955 | (sender_host_address == NULL && ignore_fromline_local) | |
1956 | ) && | |
1957 | regex_match_and_setup(regex_From, next->text, 0, -1)) | |
1958 | { | |
1959 | if (!sender_address_forced) | |
1960 | { | |
1961 | uschar *uucp_sender = expand_string(uucp_from_sender); | |
1962 | if (uucp_sender == NULL) | |
1963 | { | |
1964 | log_write(0, LOG_MAIN|LOG_PANIC, | |
1965 | "expansion of \"%s\" failed after matching " | |
1966 | "\"From \" line: %s", uucp_from_sender, expand_string_message); | |
1967 | } | |
1968 | else | |
1969 | { | |
1970 | int start, end, domain; | |
1971 | uschar *errmess; | |
1972 | uschar *newsender = parse_extract_address(uucp_sender, &errmess, | |
1973 | &start, &end, &domain, TRUE); | |
1974 | if (newsender != NULL) | |
1975 | { | |
1976 | if (domain == 0 && newsender[0] != 0) | |
1977 | newsender = rewrite_address_qualify(newsender, FALSE); | |
1978 | ||
f05da2e8 | 1979 | if (filter_test != FTEST_NONE || receive_check_set_sender(newsender)) |
059ec3d9 PH |
1980 | { |
1981 | sender_address = newsender; | |
1982 | ||
f05da2e8 | 1983 | if (trusted_caller || filter_test != FTEST_NONE) |
059ec3d9 PH |
1984 | { |
1985 | authenticated_sender = NULL; | |
1986 | originator_name = US""; | |
1987 | sender_local = FALSE; | |
1988 | } | |
1989 | ||
f05da2e8 | 1990 | if (filter_test != FTEST_NONE) |
059ec3d9 PH |
1991 | printf("Sender taken from \"From \" line\n"); |
1992 | } | |
1993 | } | |
1994 | } | |
1995 | } | |
1996 | } | |
1997 | ||
1998 | /* Not a leading "From " line. Check to see if it is a valid header line. | |
1999 | Header names may contain any non-control characters except space and colon, | |
2000 | amazingly. */ | |
2001 | ||
2002 | else | |
2003 | { | |
2004 | uschar *p = next->text; | |
2005 | ||
2006 | /* If not a valid header line, break from the header reading loop, leaving | |
2007 | next != NULL, indicating that it holds the first line of the body. */ | |
2008 | ||
2009 | if (isspace(*p)) break; | |
2010 | while (mac_isgraph(*p) && *p != ':') p++; | |
2011 | while (isspace(*p)) p++; | |
2012 | if (*p != ':') | |
2013 | { | |
2014 | body_zerocount = had_zero; | |
2015 | break; | |
2016 | } | |
2017 | ||
2018 | /* We have a valid header line. If there were any binary zeroes in | |
2019 | the line, stomp on them here. */ | |
2020 | ||
2021 | if (had_zero > 0) | |
2022 | for (p = next->text; p < next->text + ptr; p++) if (*p == 0) *p = '?'; | |
2023 | ||
2024 | /* It is perfectly legal to have an empty continuation line | |
2025 | at the end of a header, but it is confusing to humans | |
2026 | looking at such messages, since it looks like a blank line. | |
2027 | Reduce confusion by removing redundant white space at the | |
2028 | end. We know that there is at least one printing character | |
2029 | (the ':' tested for above) so there is no danger of running | |
2030 | off the end. */ | |
2031 | ||
2032 | p = next->text + ptr - 2; | |
2033 | for (;;) | |
2034 | { | |
2035 | while (*p == ' ' || *p == '\t') p--; | |
2036 | if (*p != '\n') break; | |
2037 | ptr = (p--) - next->text + 1; | |
2038 | message_size -= next->slen - ptr; | |
2039 | next->text[ptr] = 0; | |
2040 | next->slen = ptr; | |
2041 | } | |
2042 | ||
2043 | /* Add the header to the chain */ | |
2044 | ||
2045 | next->type = htype_other; | |
2046 | next->next = NULL; | |
2047 | header_last->next = next; | |
2048 | header_last = next; | |
2049 | ||
2050 | /* Check the limit for individual line lengths. This comes after adding to | |
2051 | the chain so that the failing line is reflected if a bounce is generated | |
2052 | (for a local message). */ | |
2053 | ||
2054 | if (header_line_maxsize > 0 && next->slen > header_line_maxsize) | |
2055 | { | |
2056 | log_write(0, LOG_MAIN, "overlong message header line received from " | |
2057 | "%s (more than %d characters): message abandoned", | |
2058 | sender_host_unknown? sender_ident : sender_fullhost, | |
2059 | header_line_maxsize); | |
2060 | ||
2061 | if (smtp_input) | |
2062 | { | |
2063 | smtp_reply = US"552 A message header line is too long"; | |
2064 | receive_swallow_smtp(); | |
2065 | goto TIDYUP; /* Skip to end of function */ | |
2066 | } | |
2067 | ||
2068 | else | |
2069 | { | |
2070 | give_local_error(ERRMESS_VLONGHDRLINE, | |
2071 | string_sprintf("message header line longer than %d characters " | |
2072 | "received: message not accepted", header_line_maxsize), US"", | |
2073 | error_rc, stdin, header_list->next); | |
2074 | /* Does not return */ | |
2075 | } | |
2076 | } | |
2077 | ||
2078 | /* Note if any resent- fields exist. */ | |
2079 | ||
2080 | if (!resents_exist && strncmpic(next->text, US"resent-", 7) == 0) | |
2081 | { | |
2082 | resents_exist = TRUE; | |
2083 | resent_prefix = US"Resent-"; | |
2084 | } | |
2085 | } | |
2086 | ||
2087 | /* The line has been handled. If we have hit EOF, break out of the loop, | |
2088 | indicating no pending data line. */ | |
2089 | ||
2090 | if (ch == EOF) { next = NULL; break; } | |
2091 | ||
2092 | /* Set up for the next header */ | |
2093 | ||
2094 | header_size = 256; | |
2095 | next = store_get(sizeof(header_line)); | |
2096 | next->text = store_get(header_size); | |
2097 | ptr = 0; | |
2098 | had_zero = 0; | |
d677b2f2 | 2099 | prevlines_length = 0; |
059ec3d9 PH |
2100 | } /* Continue, starting to read the next header */ |
2101 | ||
2102 | /* At this point, we have read all the headers into a data structure in main | |
2103 | store. The first header is still the dummy placeholder for the Received: header | |
2104 | we are going to generate a bit later on. If next != NULL, it contains the first | |
2105 | data line - which terminated the headers before reaching a blank line (not the | |
2106 | normal case). */ | |
2107 | ||
2108 | DEBUG(D_receive) | |
2109 | { | |
2110 | debug_printf(">>Headers received:\n"); | |
2111 | for (h = header_list->next; h != NULL; h = h->next) | |
2112 | debug_printf("%s", h->text); | |
2113 | debug_printf("\n"); | |
2114 | } | |
2115 | ||
2116 | /* End of file on any SMTP connection is an error. If an incoming SMTP call | |
2117 | is dropped immediately after valid headers, the next thing we will see is EOF. | |
2118 | We must test for this specially, as further down the reading of the data is | |
2119 | skipped if already at EOF. */ | |
2120 | ||
2121 | if (smtp_input && (receive_feof)()) | |
2122 | { | |
2123 | smtp_reply = handle_lost_connection(US" (after header)"); | |
2124 | smtp_yield = FALSE; | |
2125 | goto TIDYUP; /* Skip to end of function */ | |
2126 | } | |
2127 | ||
2128 | /* If this is a filter test run and no headers were read, output a warning | |
2129 | in case there is a mistake in the test message. */ | |
2130 | ||
f05da2e8 | 2131 | if (filter_test != FTEST_NONE && header_list->next == NULL) |
059ec3d9 PH |
2132 | printf("Warning: no message headers read\n"); |
2133 | ||
2134 | ||
2135 | /* Scan the headers to identify them. Some are merely marked for later | |
2136 | processing; some are dealt with here. */ | |
2137 | ||
2138 | for (h = header_list->next; h != NULL; h = h->next) | |
2139 | { | |
2140 | BOOL is_resent = strncmpic(h->text, US"resent-", 7) == 0; | |
2141 | if (is_resent) contains_resent_headers = TRUE; | |
2142 | ||
2143 | switch (header_checkname(h, is_resent)) | |
2144 | { | |
059ec3d9 | 2145 | case htype_bcc: |
2cbb4081 | 2146 | h->type = htype_bcc; /* Both Bcc: and Resent-Bcc: */ |
059ec3d9 PH |
2147 | break; |
2148 | ||
059ec3d9 | 2149 | case htype_cc: |
2cbb4081 | 2150 | h->type = htype_cc; /* Both Cc: and Resent-Cc: */ |
059ec3d9 PH |
2151 | break; |
2152 | ||
2153 | /* Record whether a Date: or Resent-Date: header exists, as appropriate. */ | |
2154 | ||
2155 | case htype_date: | |
4c69d561 | 2156 | if (!resents_exist || is_resent) date_header_exists = TRUE; |
059ec3d9 PH |
2157 | break; |
2158 | ||
2159 | /* Same comments as about Return-Path: below. */ | |
2160 | ||
2161 | case htype_delivery_date: | |
2162 | if (delivery_date_remove) h->type = htype_old; | |
2163 | break; | |
2164 | ||
2165 | /* Same comments as about Return-Path: below. */ | |
2166 | ||
2167 | case htype_envelope_to: | |
2168 | if (envelope_to_remove) h->type = htype_old; | |
2169 | break; | |
2170 | ||
2171 | /* Mark all "From:" headers so they get rewritten. Save the one that is to | |
2172 | be used for Sender: checking. For Sendmail compatibility, if the "From:" | |
2173 | header consists of just the login id of the user who called Exim, rewrite | |
2174 | it with the gecos field first. Apply this rule to Resent-From: if there | |
2175 | are resent- fields. */ | |
2176 | ||
2177 | case htype_from: | |
2178 | h->type = htype_from; | |
2179 | if (!resents_exist || is_resent) | |
2180 | { | |
2181 | from_header = h; | |
2182 | if (!smtp_input) | |
2183 | { | |
5de8faa3 | 2184 | int len; |
059ec3d9 PH |
2185 | uschar *s = Ustrchr(h->text, ':') + 1; |
2186 | while (isspace(*s)) s++; | |
5de8faa3 | 2187 | len = h->slen - (s - h->text) - 1; |
e0fccd1d TF |
2188 | if (Ustrlen(originator_login) == len && |
2189 | strncmpic(s, originator_login, len) == 0) | |
059ec3d9 PH |
2190 | { |
2191 | uschar *name = is_resent? US"Resent-From" : US"From"; | |
2192 | header_add(htype_from, "%s: %s <%s@%s>\n", name, originator_name, | |
2193 | originator_login, qualify_domain_sender); | |
2194 | from_header = header_last; | |
2195 | h->type = htype_old; | |
2196 | DEBUG(D_receive|D_rewrite) | |
2197 | debug_printf("rewrote \"%s:\" header using gecos\n", name); | |
2198 | } | |
2199 | } | |
2200 | } | |
2201 | break; | |
2202 | ||
2203 | /* Identify the Message-id: header for generating "in-reply-to" in the | |
2204 | autoreply transport. For incoming logging, save any resent- value. In both | |
2205 | cases, take just the first of any multiples. */ | |
2206 | ||
2207 | case htype_id: | |
2208 | if (msgid_header == NULL && (!resents_exist || is_resent)) | |
2209 | { | |
2210 | msgid_header = h; | |
2211 | h->type = htype_id; | |
2212 | } | |
2213 | break; | |
2214 | ||
2215 | /* Flag all Received: headers */ | |
2216 | ||
2217 | case htype_received: | |
2218 | h->type = htype_received; | |
2219 | received_count++; | |
2220 | break; | |
2221 | ||
2222 | /* "Reply-to:" is just noted (there is no resent-reply-to field) */ | |
2223 | ||
2224 | case htype_reply_to: | |
2225 | h->type = htype_reply_to; | |
2226 | break; | |
2227 | ||
2228 | /* The Return-path: header is supposed to be added to messages when | |
2229 | they leave the SMTP system. We shouldn't receive messages that already | |
2230 | contain Return-path. However, since Exim generates Return-path: on | |
2231 | local delivery, resent messages may well contain it. We therefore | |
2232 | provide an option (which defaults on) to remove any Return-path: headers | |
2233 | on input. Removal actually means flagging as "old", which prevents the | |
2234 | header being transmitted with the message. */ | |
2235 | ||
2236 | case htype_return_path: | |
2237 | if (return_path_remove) h->type = htype_old; | |
2238 | ||
2239 | /* If we are testing a mail filter file, use the value of the | |
2240 | Return-Path: header to set up the return_path variable, which is not | |
2241 | otherwise set. However, remove any <> that surround the address | |
2242 | because the variable doesn't have these. */ | |
2243 | ||
f05da2e8 | 2244 | if (filter_test != FTEST_NONE) |
059ec3d9 PH |
2245 | { |
2246 | uschar *start = h->text + 12; | |
2247 | uschar *end = start + Ustrlen(start); | |
2248 | while (isspace(*start)) start++; | |
2249 | while (end > start && isspace(end[-1])) end--; | |
2250 | if (*start == '<' && end[-1] == '>') | |
2251 | { | |
2252 | start++; | |
2253 | end--; | |
2254 | } | |
2255 | return_path = string_copyn(start, end - start); | |
2256 | printf("Return-path taken from \"Return-path:\" header line\n"); | |
2257 | } | |
2258 | break; | |
2259 | ||
2260 | /* If there is a "Sender:" header and the message is locally originated, | |
8800895a PH |
2261 | and from an untrusted caller and suppress_local_fixups is not set, or if we |
2262 | are in submission mode for a remote message, mark it "old" so that it will | |
2263 | not be transmitted with the message, unless active_local_sender_retain is | |
2264 | set. (This can only be true if active_local_from_check is false.) If there | |
2265 | are any resent- headers in the message, apply this rule to Resent-Sender: | |
2266 | instead of Sender:. Messages with multiple resent- header sets cannot be | |
2267 | tidily handled. (For this reason, at least one MUA - Pine - turns old | |
2268 | resent- headers into X-resent- headers when resending, leaving just one | |
2269 | set.) */ | |
059ec3d9 PH |
2270 | |
2271 | case htype_sender: | |
69358f02 | 2272 | h->type = ((!active_local_sender_retain && |
8800895a PH |
2273 | ( |
2274 | (sender_local && !trusted_caller && !suppress_local_fixups) | |
2275 | || submission_mode | |
2276 | ) | |
059ec3d9 PH |
2277 | ) && |
2278 | (!resents_exist||is_resent))? | |
2279 | htype_old : htype_sender; | |
2280 | break; | |
2281 | ||
2282 | /* Remember the Subject: header for logging. There is no Resent-Subject */ | |
2283 | ||
2284 | case htype_subject: | |
2285 | subject_header = h; | |
2286 | break; | |
2287 | ||
2288 | /* "To:" gets flagged, and the existence of a recipient header is noted, | |
2289 | whether it's resent- or not. */ | |
2290 | ||
2291 | case htype_to: | |
2292 | h->type = htype_to; | |
2293 | /**** | |
2294 | to_or_cc_header_exists = TRUE; | |
2295 | ****/ | |
2296 | break; | |
2297 | } | |
2298 | } | |
2299 | ||
2300 | /* Extract recipients from the headers if that is required (the -t option). | |
2301 | Note that this is documented as being done *before* any address rewriting takes | |
2302 | place. There are two possibilities: | |
2303 | ||
2304 | (1) According to sendmail documentation for Solaris, IRIX, and HP-UX, any | |
2305 | recipients already listed are to be REMOVED from the message. Smail 3 works | |
2306 | like this. We need to build a non-recipients tree for that list, because in | |
2307 | subsequent processing this data is held in a tree and that's what the | |
2308 | spool_write_header() function expects. Make sure that non-recipient addresses | |
2309 | are fully qualified and rewritten if necessary. | |
2310 | ||
2311 | (2) According to other sendmail documentation, -t ADDS extracted recipients to | |
2312 | those in the command line arguments (and it is rumoured some other MTAs do | |
2313 | this). Therefore, there is an option to make Exim behave this way. | |
2314 | ||
2315 | *** Notes on "Resent-" header lines *** | |
2316 | ||
2317 | The presence of resent-headers in the message makes -t horribly ambiguous. | |
2318 | Experiments with sendmail showed that it uses recipients for all resent- | |
2319 | headers, totally ignoring the concept of "sets of resent- headers" as described | |
2320 | in RFC 2822 section 3.6.6. Sendmail also amalgamates them into a single set | |
2321 | with all the addresses in one instance of each header. | |
2322 | ||
2323 | This seems to me not to be at all sensible. Before release 4.20, Exim 4 gave an | |
2324 | error for -t if there were resent- headers in the message. However, after a | |
2325 | discussion on the mailing list, I've learned that there are MUAs that use | |
2326 | resent- headers with -t, and also that the stuff about sets of resent- headers | |
2327 | and their ordering in RFC 2822 is generally ignored. An MUA that submits a | |
2328 | message with -t and resent- header lines makes sure that only *its* resent- | |
2329 | headers are present; previous ones are often renamed as X-resent- for example. | |
2330 | ||
2331 | Consequently, Exim has been changed so that, if any resent- header lines are | |
2332 | present, the recipients are taken from all of the appropriate resent- lines, | |
2333 | and not from the ordinary To:, Cc:, etc. */ | |
2334 | ||
2335 | if (extract_recip) | |
2336 | { | |
2337 | int rcount = 0; | |
2338 | error_block **bnext = &bad_addresses; | |
2339 | ||
2340 | if (extract_addresses_remove_arguments) | |
2341 | { | |
2342 | while (recipients_count-- > 0) | |
2343 | { | |
2344 | uschar *s = rewrite_address(recipients_list[recipients_count].address, | |
2345 | TRUE, TRUE, global_rewrite_rules, rewrite_existflags); | |
2346 | tree_add_nonrecipient(s); | |
2347 | } | |
2348 | recipients_list = NULL; | |
2349 | recipients_count = recipients_list_max = 0; | |
2350 | } | |
2351 | ||
059ec3d9 PH |
2352 | /* Now scan the headers */ |
2353 | ||
2354 | for (h = header_list->next; h != NULL; h = h->next) | |
2355 | { | |
2356 | if ((h->type == htype_to || h->type == htype_cc || h->type == htype_bcc) && | |
2357 | (!contains_resent_headers || strncmpic(h->text, US"resent-", 7) == 0)) | |
2358 | { | |
2359 | uschar *s = Ustrchr(h->text, ':') + 1; | |
2360 | while (isspace(*s)) s++; | |
2361 | ||
1eccaa59 PH |
2362 | parse_allow_group = TRUE; /* Allow address group syntax */ |
2363 | ||
059ec3d9 PH |
2364 | while (*s != 0) |
2365 | { | |
2366 | uschar *ss = parse_find_address_end(s, FALSE); | |
2367 | uschar *recipient, *errmess, *p, *pp; | |
2368 | int start, end, domain; | |
2369 | ||
2370 | /* Check on maximum */ | |
2371 | ||
2372 | if (recipients_max > 0 && ++rcount > recipients_max) | |
2373 | { | |
2374 | give_local_error(ERRMESS_TOOMANYRECIP, US"too many recipients", | |
2375 | US"message rejected: ", error_rc, stdin, NULL); | |
2376 | /* Does not return */ | |
2377 | } | |
2378 | ||
2379 | /* Make a copy of the address, and remove any internal newlines. These | |
2380 | may be present as a result of continuations of the header line. The | |
2381 | white space that follows the newline must not be removed - it is part | |
2382 | of the header. */ | |
2383 | ||
2384 | pp = recipient = store_get(ss - s + 1); | |
2385 | for (p = s; p < ss; p++) if (*p != '\n') *pp++ = *p; | |
2386 | *pp = 0; | |
250b6871 | 2387 | |
8c5d388a | 2388 | #ifdef SUPPORT_I18N |
250b6871 JH |
2389 | { |
2390 | BOOL b = allow_utf8_domains; | |
2391 | allow_utf8_domains = TRUE; | |
2392 | #endif | |
059ec3d9 PH |
2393 | recipient = parse_extract_address(recipient, &errmess, &start, &end, |
2394 | &domain, FALSE); | |
2395 | ||
8c5d388a | 2396 | #ifdef SUPPORT_I18N |
250b6871 JH |
2397 | if (string_is_utf8(recipient)) |
2398 | message_smtputf8 = TRUE; | |
2399 | else | |
2400 | allow_utf8_domains = b; | |
2401 | } | |
2402 | #endif | |
2403 | ||
059ec3d9 PH |
2404 | /* Keep a list of all the bad addresses so we can send a single |
2405 | error message at the end. However, an empty address is not an error; | |
2406 | just ignore it. This can come from an empty group list like | |
2407 | ||
2408 | To: Recipients of list:; | |
2409 | ||
2410 | If there are no recipients at all, an error will occur later. */ | |
2411 | ||
2412 | if (recipient == NULL && Ustrcmp(errmess, "empty address") != 0) | |
2413 | { | |
2414 | int len = Ustrlen(s); | |
2415 | error_block *b = store_get(sizeof(error_block)); | |
2416 | while (len > 0 && isspace(s[len-1])) len--; | |
2417 | b->next = NULL; | |
2418 | b->text1 = string_printing(string_copyn(s, len)); | |
2419 | b->text2 = errmess; | |
2420 | *bnext = b; | |
2421 | bnext = &(b->next); | |
2422 | } | |
2423 | ||
2424 | /* If the recipient is already in the nonrecipients tree, it must | |
2425 | have appeared on the command line with the option extract_addresses_ | |
2426 | remove_arguments set. Do not add it to the recipients, and keep a note | |
2427 | that this has happened, in order to give a better error if there are | |
2428 | no recipients left. */ | |
2429 | ||
2430 | else if (recipient != NULL) | |
2431 | { | |
2432 | if (tree_search(tree_nonrecipients, recipient) == NULL) | |
2433 | receive_add_recipient(recipient, -1); | |
2434 | else | |
2435 | extracted_ignored = TRUE; | |
2436 | } | |
2437 | ||
2438 | /* Move on past this address */ | |
2439 | ||
2440 | s = ss + (*ss? 1:0); | |
2441 | while (isspace(*s)) s++; | |
1eccaa59 PH |
2442 | } /* Next address */ |
2443 | ||
2444 | parse_allow_group = FALSE; /* Reset group syntax flags */ | |
2445 | parse_found_group = FALSE; | |
059ec3d9 PH |
2446 | |
2447 | /* If this was the bcc: header, mark it "old", which means it | |
2448 | will be kept on the spool, but not transmitted as part of the | |
2449 | message. */ | |
2450 | ||
2cbb4081 | 2451 | if (h->type == htype_bcc) h->type = htype_old; |
059ec3d9 PH |
2452 | } /* For appropriate header line */ |
2453 | } /* For each header line */ | |
2454 | ||
059ec3d9 PH |
2455 | } |
2456 | ||
2457 | /* Now build the unique message id. This has changed several times over the | |
2458 | lifetime of Exim. This description was rewritten for Exim 4.14 (February 2003). | |
2459 | Retaining all the history in the comment has become too unwieldy - read | |
2460 | previous release sources if you want it. | |
2461 | ||
2462 | The message ID has 3 parts: tttttt-pppppp-ss. Each part is a number in base 62. | |
2463 | The first part is the current time, in seconds. The second part is the current | |
2464 | pid. Both are large enough to hold 32-bit numbers in base 62. The third part | |
2465 | can hold a number in the range 0-3843. It used to be a computed sequence | |
2466 | number, but is now the fractional component of the current time in units of | |
2467 | 1/2000 of a second (i.e. a value in the range 0-1999). After a message has been | |
2468 | received, Exim ensures that the timer has ticked at the appropriate level | |
2469 | before proceeding, to avoid duplication if the pid happened to be re-used | |
2470 | within the same time period. It seems likely that most messages will take at | |
2471 | least half a millisecond to be received, so no delay will normally be | |
2472 | necessary. At least for some time... | |
2473 | ||
2474 | There is a modification when localhost_number is set. Formerly this was allowed | |
2475 | to be as large as 255. Now it is restricted to the range 0-16, and the final | |
2476 | component of the message id becomes (localhost_number * 200) + fractional time | |
2477 | in units of 1/200 of a second (i.e. a value in the range 0-3399). | |
2478 | ||
2479 | Some not-really-Unix operating systems use case-insensitive file names (Darwin, | |
2480 | Cygwin). For these, we have to use base 36 instead of base 62. Luckily, this | |
2481 | still allows the tttttt field to hold a large enough number to last for some | |
2482 | more decades, and the final two-digit field can hold numbers up to 1295, which | |
2483 | is enough for milliseconds (instead of 1/2000 of a second). | |
2484 | ||
2485 | However, the pppppp field cannot hold a 32-bit pid, but it can hold a 31-bit | |
2486 | pid, so it is probably safe because pids have to be positive. The | |
2487 | localhost_number is restricted to 0-10 for these hosts, and when it is set, the | |
2488 | final field becomes (localhost_number * 100) + fractional time in centiseconds. | |
2489 | ||
2490 | Note that string_base62() returns its data in a static storage block, so it | |
2491 | must be copied before calling string_base62() again. It always returns exactly | |
2492 | 6 characters. | |
2493 | ||
2494 | There doesn't seem to be anything in the RFC which requires a message id to | |
2495 | start with a letter, but Smail was changed to ensure this. The external form of | |
2496 | the message id (as supplied by string expansion) therefore starts with an | |
2497 | additional leading 'E'. The spool file names do not include this leading | |
2498 | letter and it is not used internally. | |
2499 | ||
2500 | NOTE: If ever the format of message ids is changed, the regular expression for | |
2501 | checking that a string is in this format must be updated in a corresponding | |
2502 | way. It appears in the initializing code in exim.c. The macro MESSAGE_ID_LENGTH | |
2503 | must also be changed to reflect the correct string length. Then, of course, | |
2504 | other programs that rely on the message id format will need updating too. */ | |
2505 | ||
2506 | Ustrncpy(message_id, string_base62((long int)(message_id_tv.tv_sec)), 6); | |
2507 | message_id[6] = '-'; | |
2508 | Ustrncpy(message_id + 7, string_base62((long int)getpid()), 6); | |
2509 | ||
2510 | /* Deal with the case where the host number is set. The value of the number was | |
2511 | checked when it was read, to ensure it isn't too big. The timing granularity is | |
2512 | left in id_resolution so that an appropriate wait can be done after receiving | |
2513 | the message, if necessary (we hope it won't be). */ | |
2514 | ||
2515 | if (host_number_string != NULL) | |
2516 | { | |
2517 | id_resolution = (BASE_62 == 62)? 5000 : 10000; | |
2518 | sprintf(CS(message_id + MESSAGE_ID_LENGTH - 3), "-%2s", | |
2519 | string_base62((long int)( | |
2520 | host_number * (1000000/id_resolution) + | |
2521 | message_id_tv.tv_usec/id_resolution)) + 4); | |
2522 | } | |
2523 | ||
2524 | /* Host number not set: final field is just the fractional time at an | |
2525 | appropriate resolution. */ | |
2526 | ||
2527 | else | |
2528 | { | |
2529 | id_resolution = (BASE_62 == 62)? 500 : 1000; | |
2530 | sprintf(CS(message_id + MESSAGE_ID_LENGTH - 3), "-%2s", | |
2531 | string_base62((long int)(message_id_tv.tv_usec/id_resolution)) + 4); | |
2532 | } | |
2533 | ||
2534 | /* Add the current message id onto the current process info string if | |
2535 | it will fit. */ | |
2536 | ||
2537 | (void)string_format(process_info + process_info_len, | |
2538 | PROCESS_INFO_SIZE - process_info_len, " id=%s", message_id); | |
2539 | ||
2540 | /* If we are using multiple input directories, set up the one for this message | |
2541 | to be the least significant base-62 digit of the time of arrival. Otherwise | |
2542 | ensure that it is an empty string. */ | |
2543 | ||
a2da3176 | 2544 | message_subdir[0] = split_spool_directory ? message_id[5] : 0; |
059ec3d9 PH |
2545 | |
2546 | /* Now that we have the message-id, if there is no message-id: header, generate | |
8800895a PH |
2547 | one, but only for local (without suppress_local_fixups) or submission mode |
2548 | messages. This can be user-configured if required, but we had better flatten | |
2549 | any illegal characters therein. */ | |
059ec3d9 | 2550 | |
8800895a PH |
2551 | if (msgid_header == NULL && |
2552 | ((sender_host_address == NULL && !suppress_local_fixups) | |
2553 | || submission_mode)) | |
059ec3d9 PH |
2554 | { |
2555 | uschar *p; | |
2556 | uschar *id_text = US""; | |
2557 | uschar *id_domain = primary_hostname; | |
2558 | ||
2559 | /* Permit only letters, digits, dots, and hyphens in the domain */ | |
2560 | ||
2561 | if (message_id_domain != NULL) | |
2562 | { | |
2563 | uschar *new_id_domain = expand_string(message_id_domain); | |
2564 | if (new_id_domain == NULL) | |
2565 | { | |
2566 | if (!expand_string_forcedfail) | |
2567 | log_write(0, LOG_MAIN|LOG_PANIC, | |
2568 | "expansion of \"%s\" (message_id_header_domain) " | |
2569 | "failed: %s", message_id_domain, expand_string_message); | |
2570 | } | |
2571 | else if (*new_id_domain != 0) | |
2572 | { | |
2573 | id_domain = new_id_domain; | |
2574 | for (p = id_domain; *p != 0; p++) | |
2575 | if (!isalnum(*p) && *p != '.') *p = '-'; /* No need to test '-' ! */ | |
2576 | } | |
2577 | } | |
2578 | ||
2579 | /* Permit all characters except controls and RFC 2822 specials in the | |
2580 | additional text part. */ | |
2581 | ||
2582 | if (message_id_text != NULL) | |
2583 | { | |
2584 | uschar *new_id_text = expand_string(message_id_text); | |
2585 | if (new_id_text == NULL) | |
2586 | { | |
2587 | if (!expand_string_forcedfail) | |
2588 | log_write(0, LOG_MAIN|LOG_PANIC, | |
2589 | "expansion of \"%s\" (message_id_header_text) " | |
2590 | "failed: %s", message_id_text, expand_string_message); | |
2591 | } | |
2592 | else if (*new_id_text != 0) | |
2593 | { | |
2594 | id_text = new_id_text; | |
2595 | for (p = id_text; *p != 0; p++) | |
2596 | if (mac_iscntrl_or_special(*p)) *p = '-'; | |
2597 | } | |
2598 | } | |
2599 | ||
e7e680d6 PP |
2600 | /* Add the header line |
2601 | * Resent-* headers are prepended, per RFC 5322 3.6.6. Non-Resent-* are | |
2602 | * appended, to preserve classical expectations of header ordering. */ | |
059ec3d9 | 2603 | |
e7e680d6 | 2604 | header_add_at_position(!resents_exist, NULL, FALSE, htype_id, |
5eb690a1 NM |
2605 | "%sMessage-Id: <%s%s%s@%s>\n", resent_prefix, message_id_external, |
2606 | (*id_text == 0)? "" : ".", id_text, id_domain); | |
059ec3d9 PH |
2607 | } |
2608 | ||
2609 | /* If we are to log recipients, keep a copy of the raw ones before any possible | |
2610 | rewriting. Must copy the count, because later ACLs and the local_scan() | |
2611 | function may mess with the real recipients. */ | |
2612 | ||
6c6d6e48 | 2613 | if (LOGGING(received_recipients)) |
059ec3d9 PH |
2614 | { |
2615 | raw_recipients = store_get(recipients_count * sizeof(uschar *)); | |
2616 | for (i = 0; i < recipients_count; i++) | |
2617 | raw_recipients[i] = string_copy(recipients_list[i].address); | |
2618 | raw_recipients_count = recipients_count; | |
2619 | } | |
2620 | ||
2621 | /* Ensure the recipients list is fully qualified and rewritten. Unqualified | |
2622 | recipients will get here only if the conditions were right (allow_unqualified_ | |
2623 | recipient is TRUE). */ | |
2624 | ||
2625 | for (i = 0; i < recipients_count; i++) | |
2626 | recipients_list[i].address = | |
2627 | rewrite_address(recipients_list[i].address, TRUE, TRUE, | |
2628 | global_rewrite_rules, rewrite_existflags); | |
2629 | ||
8800895a PH |
2630 | /* If there is no From: header, generate one for local (without |
2631 | suppress_local_fixups) or submission_mode messages. If there is no sender | |
2632 | address, but the sender is local or this is a local delivery error, use the | |
2633 | originator login. This shouldn't happen for genuine bounces, but might happen | |
2634 | for autoreplies. The addition of From: must be done *before* checking for the | |
2635 | possible addition of a Sender: header, because untrusted_set_sender allows an | |
2636 | untrusted user to set anything in the envelope (which might then get info | |
2637 | From:) but we still want to ensure a valid Sender: if it is required. */ | |
2638 | ||
2639 | if (from_header == NULL && | |
2640 | ((sender_host_address == NULL && !suppress_local_fixups) | |
2641 | || submission_mode)) | |
059ec3d9 | 2642 | { |
2fe1a124 PH |
2643 | uschar *oname = US""; |
2644 | ||
2645 | /* Use the originator_name if this is a locally submitted message and the | |
2646 | caller is not trusted. For trusted callers, use it only if -F was used to | |
2647 | force its value or if we have a non-SMTP message for which -f was not used | |
2648 | to set the sender. */ | |
2649 | ||
2650 | if (sender_host_address == NULL) | |
2651 | { | |
2652 | if (!trusted_caller || sender_name_forced || | |
2653 | (!smtp_input && !sender_address_forced)) | |
2654 | oname = originator_name; | |
2655 | } | |
2656 | ||
2657 | /* For non-locally submitted messages, the only time we use the originator | |
2658 | name is when it was forced by the /name= option on control=submission. */ | |
2659 | ||
2660 | else | |
2661 | { | |
2662 | if (submission_name != NULL) oname = submission_name; | |
2663 | } | |
2664 | ||
059ec3d9 PH |
2665 | /* Envelope sender is empty */ |
2666 | ||
2667 | if (sender_address[0] == 0) | |
2668 | { | |
87ba3f5f PH |
2669 | uschar *fromstart, *fromend; |
2670 | ||
2671 | fromstart = string_sprintf("%sFrom: %s%s", resent_prefix, | |
2fe1a124 PH |
2672 | oname, (oname[0] == 0)? "" : " <"); |
2673 | fromend = (oname[0] == 0)? US"" : US">"; | |
87ba3f5f | 2674 | |
059ec3d9 PH |
2675 | if (sender_local || local_error_message) |
2676 | { | |
87ba3f5f PH |
2677 | header_add(htype_from, "%s%s@%s%s\n", fromstart, |
2678 | local_part_quote(originator_login), qualify_domain_sender, | |
2679 | fromend); | |
059ec3d9 PH |
2680 | } |
2681 | else if (submission_mode && authenticated_id != NULL) | |
2682 | { | |
2683 | if (submission_domain == NULL) | |
2684 | { | |
87ba3f5f PH |
2685 | header_add(htype_from, "%s%s@%s%s\n", fromstart, |
2686 | local_part_quote(authenticated_id), qualify_domain_sender, | |
2687 | fromend); | |
059ec3d9 PH |
2688 | } |
2689 | else if (submission_domain[0] == 0) /* empty => whole address set */ | |
2690 | { | |
87ba3f5f PH |
2691 | header_add(htype_from, "%s%s%s\n", fromstart, authenticated_id, |
2692 | fromend); | |
059ec3d9 PH |
2693 | } |
2694 | else | |
2695 | { | |
87ba3f5f PH |
2696 | header_add(htype_from, "%s%s@%s%s\n", fromstart, |
2697 | local_part_quote(authenticated_id), submission_domain, | |
2698 | fromend); | |
059ec3d9 PH |
2699 | } |
2700 | from_header = header_last; /* To get it checked for Sender: */ | |
2701 | } | |
2702 | } | |
2703 | ||
2704 | /* There is a non-null envelope sender. Build the header using the original | |
2705 | sender address, before any rewriting that might have been done while | |
2706 | verifying it. */ | |
2707 | ||
2708 | else | |
2709 | { | |
87ba3f5f | 2710 | header_add(htype_from, "%sFrom: %s%s%s%s\n", resent_prefix, |
2fe1a124 PH |
2711 | oname, |
2712 | (oname[0] == 0)? "" : " <", | |
87ba3f5f PH |
2713 | (sender_address_unrewritten == NULL)? |
2714 | sender_address : sender_address_unrewritten, | |
2fe1a124 | 2715 | (oname[0] == 0)? "" : ">"); |
059ec3d9 PH |
2716 | |
2717 | from_header = header_last; /* To get it checked for Sender: */ | |
2718 | } | |
2719 | } | |
2720 | ||
2721 | ||
8800895a PH |
2722 | /* If the sender is local (without suppress_local_fixups), or if we are in |
2723 | submission mode and there is an authenticated_id, check that an existing From: | |
2724 | is correct, and if not, generate a Sender: header, unless disabled. Any | |
2725 | previously-existing Sender: header was removed above. Note that sender_local, | |
2726 | as well as being TRUE if the caller of exim is not trusted, is also true if a | |
2727 | trusted caller did not supply a -f argument for non-smtp input. To allow | |
2728 | trusted callers to forge From: without supplying -f, we have to test explicitly | |
2729 | here. If the From: header contains more than one address, then the call to | |
2730 | parse_extract_address fails, and a Sender: header is inserted, as required. */ | |
059ec3d9 PH |
2731 | |
2732 | if (from_header != NULL && | |
69358f02 | 2733 | (active_local_from_check && |
8800895a | 2734 | ((sender_local && !trusted_caller && !suppress_local_fixups) || |
69358f02 | 2735 | (submission_mode && authenticated_id != NULL)) |
059ec3d9 PH |
2736 | )) |
2737 | { | |
2738 | BOOL make_sender = TRUE; | |
2739 | int start, end, domain; | |
2740 | uschar *errmess; | |
2741 | uschar *from_address = | |
2742 | parse_extract_address(Ustrchr(from_header->text, ':') + 1, &errmess, | |
2743 | &start, &end, &domain, FALSE); | |
2744 | uschar *generated_sender_address; | |
2745 | ||
2746 | if (submission_mode) | |
2747 | { | |
2748 | if (submission_domain == NULL) | |
2749 | { | |
2750 | generated_sender_address = string_sprintf("%s@%s", | |
2751 | local_part_quote(authenticated_id), qualify_domain_sender); | |
2752 | } | |
2753 | else if (submission_domain[0] == 0) /* empty => full address */ | |
2754 | { | |
2755 | generated_sender_address = string_sprintf("%s", | |
2756 | authenticated_id); | |
2757 | } | |
2758 | else | |
2759 | { | |
2760 | generated_sender_address = string_sprintf("%s@%s", | |
2761 | local_part_quote(authenticated_id), submission_domain); | |
2762 | } | |
2763 | } | |
2764 | else | |
2765 | generated_sender_address = string_sprintf("%s@%s", | |
2766 | local_part_quote(originator_login), qualify_domain_sender); | |
2767 | ||
2768 | /* Remove permitted prefixes and suffixes from the local part of the From: | |
2769 | address before doing the comparison with the generated sender. */ | |
2770 | ||
2771 | if (from_address != NULL) | |
2772 | { | |
2773 | int slen; | |
2774 | uschar *at = (domain == 0)? NULL : from_address + domain - 1; | |
2775 | ||
2776 | if (at != NULL) *at = 0; | |
2777 | from_address += route_check_prefix(from_address, local_from_prefix); | |
2778 | slen = route_check_suffix(from_address, local_from_suffix); | |
2779 | if (slen > 0) | |
2780 | { | |
2781 | memmove(from_address+slen, from_address, Ustrlen(from_address)-slen); | |
2782 | from_address += slen; | |
2783 | } | |
2784 | if (at != NULL) *at = '@'; | |
2785 | ||
2786 | if (strcmpic(generated_sender_address, from_address) == 0 || | |
2787 | (domain == 0 && strcmpic(from_address, originator_login) == 0)) | |
2788 | make_sender = FALSE; | |
2789 | } | |
2790 | ||
2791 | /* We have to cause the Sender header to be rewritten if there are | |
2792 | appropriate rewriting rules. */ | |
2793 | ||
2794 | if (make_sender) | |
2795 | { | |
2fe1a124 | 2796 | if (submission_mode && submission_name == NULL) |
059ec3d9 PH |
2797 | header_add(htype_sender, "%sSender: %s\n", resent_prefix, |
2798 | generated_sender_address); | |
2799 | else | |
2800 | header_add(htype_sender, "%sSender: %s <%s>\n", | |
2fe1a124 PH |
2801 | resent_prefix, |
2802 | submission_mode? submission_name : originator_name, | |
2803 | generated_sender_address); | |
059ec3d9 | 2804 | } |
87ba3f5f PH |
2805 | |
2806 | /* Ensure that a non-null envelope sender address corresponds to the | |
2807 | submission mode sender address. */ | |
2808 | ||
2809 | if (submission_mode && sender_address[0] != 0) | |
2810 | { | |
2811 | if (sender_address_unrewritten == NULL) | |
2812 | sender_address_unrewritten = sender_address; | |
2813 | sender_address = generated_sender_address; | |
089793a4 TF |
2814 | if (Ustrcmp(sender_address_unrewritten, generated_sender_address) != 0) |
2815 | log_write(L_address_rewrite, LOG_MAIN, | |
2816 | "\"%s\" from env-from rewritten as \"%s\" by submission mode", | |
2817 | sender_address_unrewritten, generated_sender_address); | |
87ba3f5f | 2818 | } |
059ec3d9 PH |
2819 | } |
2820 | ||
059ec3d9 PH |
2821 | /* If there are any rewriting rules, apply them to the sender address, unless |
2822 | it has already been rewritten as part of verification for SMTP input. */ | |
2823 | ||
2824 | if (global_rewrite_rules != NULL && sender_address_unrewritten == NULL && | |
2825 | sender_address[0] != 0) | |
2826 | { | |
2827 | sender_address = rewrite_address(sender_address, FALSE, TRUE, | |
2828 | global_rewrite_rules, rewrite_existflags); | |
2829 | DEBUG(D_receive|D_rewrite) | |
2830 | debug_printf("rewritten sender = %s\n", sender_address); | |
2831 | } | |
2832 | ||
2833 | ||
2834 | /* The headers must be run through rewrite_header(), because it ensures that | |
2835 | addresses are fully qualified, as well as applying any rewriting rules that may | |
2836 | exist. | |
2837 | ||
2838 | Qualification of header addresses in a message from a remote host happens only | |
2839 | if the host is in sender_unqualified_hosts or recipient_unqualified hosts, as | |
2840 | appropriate. For local messages, qualification always happens, unless -bnq is | |
2841 | used to explicitly suppress it. No rewriting is done for an unqualified address | |
2842 | that is left untouched. | |
2843 | ||
2844 | We start at the second header, skipping our own Received:. This rewriting is | |
2845 | documented as happening *after* recipient addresses are taken from the headers | |
2846 | by the -t command line option. An added Sender: gets rewritten here. */ | |
2847 | ||
2848 | for (h = header_list->next; h != NULL; h = h->next) | |
2849 | { | |
2850 | header_line *newh = rewrite_header(h, NULL, NULL, global_rewrite_rules, | |
2851 | rewrite_existflags, TRUE); | |
2852 | if (newh != NULL) h = newh; | |
2853 | } | |
2854 | ||
2855 | ||
2856 | /* An RFC 822 (sic) message is not legal unless it has at least one of "to", | |
2cbb4081 | 2857 | "cc", or "bcc". Note that although the minimal examples in RFC 822 show just |
059ec3d9 PH |
2858 | "to" or "bcc", the full syntax spec allows "cc" as well. If any resent- header |
2859 | exists, this applies to the set of resent- headers rather than the normal set. | |
2860 | ||
2cbb4081 PH |
2861 | The requirement for a recipient header has been removed in RFC 2822. At this |
2862 | point in the code, earlier versions of Exim added a To: header for locally | |
2863 | submitted messages, and an empty Bcc: header for others. In the light of the | |
2864 | changes in RFC 2822, this was dropped in November 2003. */ | |
059ec3d9 | 2865 | |
059ec3d9 PH |
2866 | |
2867 | /* If there is no date header, generate one if the message originates locally | |
8800895a PH |
2868 | (i.e. not over TCP/IP) and suppress_local_fixups is not set, or if the |
2869 | submission mode flag is set. Messages without Date: are not valid, but it seems | |
e7e680d6 PP |
2870 | to be more confusing if Exim adds one to all remotely-originated messages. |
2871 | As per Message-Id, we prepend if resending, else append. | |
2872 | */ | |
059ec3d9 | 2873 | |
8800895a PH |
2874 | if (!date_header_exists && |
2875 | ((sender_host_address == NULL && !suppress_local_fixups) | |
2876 | || submission_mode)) | |
e7e680d6 PP |
2877 | header_add_at_position(!resents_exist, NULL, FALSE, htype_other, |
2878 | "%sDate: %s\n", resent_prefix, tod_stamp(tod_full)); | |
059ec3d9 PH |
2879 | |
2880 | search_tidyup(); /* Free any cached resources */ | |
2881 | ||
2882 | /* Show the complete set of headers if debugging. Note that the first one (the | |
2883 | new Received:) has not yet been set. */ | |
2884 | ||
2885 | DEBUG(D_receive) | |
2886 | { | |
2887 | debug_printf(">>Headers after rewriting and local additions:\n"); | |
2888 | for (h = header_list->next; h != NULL; h = h->next) | |
2889 | debug_printf("%c %s", h->type, h->text); | |
2890 | debug_printf("\n"); | |
2891 | } | |
2892 | ||
2893 | /* The headers are now complete in store. If we are running in filter | |
2894 | testing mode, that is all this function does. Return TRUE if the message | |
2895 | ended with a dot. */ | |
2896 | ||
f05da2e8 | 2897 | if (filter_test != FTEST_NONE) |
059ec3d9 PH |
2898 | { |
2899 | process_info[process_info_len] = 0; | |
2900 | return message_ended == END_DOT; | |
2901 | } | |
2902 | ||
7e3ce68e JH |
2903 | /*XXX CHUNKING: need to cancel cutthrough under BDAT, for now. In future, |
2904 | think more if it could be handled. Cannot do onward CHUNKING unless | |
2905 | inbound is, but inbound chunking ought to be ok with outbound plain. | |
2906 | Could we do onward CHUNKING given inbound CHUNKING? | |
2907 | */ | |
2908 | if (chunking_state > CHUNKING_OFFERED) | |
2909 | cancel_cutthrough_connection("chunking active"); | |
2910 | ||
817d9f57 | 2911 | /* Cutthrough delivery: |
5032d1cf JH |
2912 | We have to create the Received header now rather than at the end of reception, |
2913 | so the timestamp behaviour is a change to the normal case. | |
2914 | XXX Ensure this gets documented XXX. | |
2915 | Having created it, send the headers to the destination. */ | |
2916 | if (cutthrough.fd >= 0) | |
e4bdf652 | 2917 | { |
817d9f57 JH |
2918 | if (received_count > received_headers_max) |
2919 | { | |
2e5b33cd | 2920 | cancel_cutthrough_connection("too many headers"); |
817d9f57 JH |
2921 | if (smtp_input) receive_swallow_smtp(); /* Swallow incoming SMTP */ |
2922 | log_write(0, LOG_MAIN|LOG_REJECT, "rejected from <%s>%s%s%s%s: " | |
2923 | "Too many \"Received\" headers", | |
2924 | sender_address, | |
2925 | (sender_fullhost == NULL)? "" : " H=", | |
2926 | (sender_fullhost == NULL)? US"" : sender_fullhost, | |
2927 | (sender_ident == NULL)? "" : " U=", | |
2928 | (sender_ident == NULL)? US"" : sender_ident); | |
2929 | message_id[0] = 0; /* Indicate no message accepted */ | |
2930 | smtp_reply = US"550 Too many \"Received\" headers - suspected mail loop"; | |
2931 | goto TIDYUP; /* Skip to end of function */ | |
2932 | } | |
e4bdf652 | 2933 | received_header_gen(); |
578d43dc | 2934 | add_acl_headers(ACL_WHERE_RCPT, US"MAIL or RCPT"); |
e4bdf652 JH |
2935 | (void) cutthrough_headers_send(); |
2936 | } | |
61147df4 | 2937 | |
e4bdf652 | 2938 | |
059ec3d9 PH |
2939 | /* Open a new spool file for the data portion of the message. We need |
2940 | to access it both via a file descriptor and a stream. Try to make the | |
41313d92 | 2941 | directory if it isn't there. */ |
059ec3d9 | 2942 | |
41313d92 | 2943 | spool_name = spool_fname(US"input", message_subdir, message_id, US"-D"); |
a2da3176 JH |
2944 | DEBUG(D_receive) debug_printf("Data file name: %s\n", spool_name); |
2945 | ||
2946 | if ((data_fd = Uopen(spool_name, O_RDWR|O_CREAT|O_EXCL, SPOOL_MODE)) < 0) | |
059ec3d9 PH |
2947 | { |
2948 | if (errno == ENOENT) | |
2949 | { | |
0971ec06 | 2950 | (void) directory_make(spool_directory, |
41313d92 JH |
2951 | spool_sname(US"input", message_subdir), |
2952 | INPUT_DIRECTORY_MODE, TRUE); | |
059ec3d9 PH |
2953 | data_fd = Uopen(spool_name, O_RDWR|O_CREAT|O_EXCL, SPOOL_MODE); |
2954 | } | |
2955 | if (data_fd < 0) | |
2956 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to create spool file %s: %s", | |
2957 | spool_name, strerror(errno)); | |
2958 | } | |
2959 | ||
2960 | /* Make sure the file's group is the Exim gid, and double-check the mode | |
2961 | because the group setting doesn't always get set automatically. */ | |
2962 | ||
1ac6b2e7 JH |
2963 | if (fchown(data_fd, exim_uid, exim_gid)) |
2964 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, | |
2965 | "Failed setting ownership on spool file %s: %s", | |
2966 | spool_name, strerror(errno)); | |
ff790e47 | 2967 | (void)fchmod(data_fd, SPOOL_MODE); |
059ec3d9 PH |
2968 | |
2969 | /* We now have data file open. Build a stream for it and lock it. We lock only | |
2970 | the first line of the file (containing the message ID) because otherwise there | |
2971 | are problems when Exim is run under Cygwin (I'm told). See comments in | |
2972 | spool_in.c, where the same locking is done. */ | |
2973 | ||
2974 | data_file = fdopen(data_fd, "w+"); | |
2975 | lock_data.l_type = F_WRLCK; | |
2976 | lock_data.l_whence = SEEK_SET; | |
2977 | lock_data.l_start = 0; | |
2978 | lock_data.l_len = SPOOL_DATA_START_OFFSET; | |
2979 | ||
2980 | if (fcntl(data_fd, F_SETLK, &lock_data) < 0) | |
2981 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Cannot lock %s (%d): %s", spool_name, | |
2982 | errno, strerror(errno)); | |
2983 | ||
2984 | /* We have an open, locked data file. Write the message id to it to make it | |
2985 | self-identifying. Then read the remainder of the input of this message and | |
2986 | write it to the data file. If the variable next != NULL, it contains the first | |
2987 | data line (which was read as a header but then turned out not to have the right | |
2988 | format); write it (remembering that it might contain binary zeros). The result | |
2989 | of fwrite() isn't inspected; instead we call ferror() below. */ | |
2990 | ||
2991 | fprintf(data_file, "%s-D\n", message_id); | |
2992 | if (next != NULL) | |
2993 | { | |
2994 | uschar *s = next->text; | |
2995 | int len = next->slen; | |
1ac6b2e7 | 2996 | len = fwrite(s, 1, len, data_file); len = len; /* compiler quietening */ |
059ec3d9 PH |
2997 | body_linecount++; /* Assumes only 1 line */ |
2998 | } | |
2999 | ||
3000 | /* Note that we might already be at end of file, or the logical end of file | |
3001 | (indicated by '.'), or might have encountered an error while writing the | |
3002 | message id or "next" line. */ | |
3003 | ||
3004 | if (!ferror(data_file) && !(receive_feof)() && message_ended != END_DOT) | |
3005 | { | |
3006 | if (smtp_input) | |
3007 | { | |
7e3ce68e JH |
3008 | message_ended = chunking_state > CHUNKING_OFFERED |
3009 | ? read_message_bdat_smtp(data_file) | |
3010 | : read_message_data_smtp(data_file); | |
059ec3d9 PH |
3011 | receive_linecount++; /* The terminating "." line */ |
3012 | } | |
3013 | else message_ended = read_message_data(data_file); | |
3014 | ||
3015 | receive_linecount += body_linecount; /* For BSMTP errors mainly */ | |
2e0c1448 | 3016 | message_linecount += body_linecount; |
059ec3d9 | 3017 | |
7e3ce68e | 3018 | switch (message_ended) |
059ec3d9 | 3019 | { |
7e3ce68e | 3020 | /* Handle premature termination of SMTP */ |
059ec3d9 | 3021 | |
7e3ce68e JH |
3022 | case END_EOF: |
3023 | if (smtp_input) | |
3024 | { | |
3025 | Uunlink(spool_name); /* Lose data file when closed */ | |
3026 | cancel_cutthrough_connection("sender closed connection"); | |
3027 | message_id[0] = 0; /* Indicate no message accepted */ | |
3028 | smtp_reply = handle_lost_connection(US""); | |
3029 | smtp_yield = FALSE; | |
3030 | goto TIDYUP; /* Skip to end of function */ | |
3031 | } | |
3032 | break; | |
059ec3d9 | 3033 | |
7e3ce68e JH |
3034 | /* Handle message that is too big. Don't use host_or_ident() in the log |
3035 | message; we want to see the ident value even for non-remote messages. */ | |
059ec3d9 | 3036 | |
7e3ce68e JH |
3037 | case END_SIZE: |
3038 | Uunlink(spool_name); /* Lose the data file when closed */ | |
3039 | cancel_cutthrough_connection("mail too big"); | |
3040 | if (smtp_input) receive_swallow_smtp(); /* Swallow incoming SMTP */ | |
059ec3d9 | 3041 | |
7e3ce68e JH |
3042 | log_write(L_size_reject, LOG_MAIN|LOG_REJECT, "rejected from <%s>%s%s%s%s: " |
3043 | "message too big: read=%d max=%d", | |
3044 | sender_address, | |
3045 | (sender_fullhost == NULL)? "" : " H=", | |
3046 | (sender_fullhost == NULL)? US"" : sender_fullhost, | |
3047 | (sender_ident == NULL)? "" : " U=", | |
3048 | (sender_ident == NULL)? US"" : sender_ident, | |
3049 | message_size, | |
3050 | thismessage_size_limit); | |
3051 | ||
3052 | if (smtp_input) | |
3053 | { | |
3054 | smtp_reply = US"552 Message size exceeds maximum permitted"; | |
3055 | message_id[0] = 0; /* Indicate no message accepted */ | |
3056 | goto TIDYUP; /* Skip to end of function */ | |
3057 | } | |
3058 | else | |
3059 | { | |
3060 | fseek(data_file, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3061 | give_local_error(ERRMESS_TOOBIG, | |
3062 | string_sprintf("message too big (max=%d)", thismessage_size_limit), | |
3063 | US"message rejected: ", error_rc, data_file, header_list); | |
3064 | /* Does not return */ | |
3065 | } | |
3066 | break; | |
3067 | ||
3068 | /* Handle bad BDAT protocol sequence */ | |
3069 | ||
3070 | case END_PROTOCOL: | |
3071 | Uunlink(spool_name); /* Lose the data file when closed */ | |
3072 | cancel_cutthrough_connection("sender protocol error"); | |
3073 | smtp_reply = US""; /* Response already sent */ | |
3074 | message_id[0] = 0; /* Indicate no message accepted */ | |
3075 | goto TIDYUP; /* Skip to end of function */ | |
059ec3d9 PH |
3076 | } |
3077 | } | |
3078 | ||
3079 | /* Restore the standard SIGALRM handler for any subsequent processing. (For | |
3080 | example, there may be some expansion in an ACL that uses a timer.) */ | |
3081 | ||
3082 | os_non_restarting_signal(SIGALRM, sigalrm_handler); | |
3083 | ||
3084 | /* The message body has now been read into the data file. Call fflush() to | |
3085 | empty the buffers in C, and then call fsync() to get the data written out onto | |
3086 | the disk, as fflush() doesn't do this (or at least, it isn't documented as | |
3087 | having to do this). If there was an I/O error on either input or output, | |
3088 | attempt to send an error message, and unlink the spool file. For non-SMTP input | |
3089 | we can then give up. Note that for SMTP input we must swallow the remainder of | |
3090 | the input in cases of output errors, since the far end doesn't expect to see | |
3091 | anything until the terminating dot line is sent. */ | |
3092 | ||
3093 | if (fflush(data_file) == EOF || ferror(data_file) || | |
54fc8428 | 3094 | EXIMfsync(fileno(data_file)) < 0 || (receive_ferror)()) |
059ec3d9 PH |
3095 | { |
3096 | uschar *msg_errno = US strerror(errno); | |
3097 | BOOL input_error = (receive_ferror)() != 0; | |
3098 | uschar *msg = string_sprintf("%s error (%s) while receiving message from %s", | |
3099 | input_error? "Input read" : "Spool write", | |
3100 | msg_errno, | |
3101 | (sender_fullhost != NULL)? sender_fullhost : sender_ident); | |
3102 | ||
3103 | log_write(0, LOG_MAIN, "Message abandoned: %s", msg); | |
3104 | Uunlink(spool_name); /* Lose the data file */ | |
2e5b33cd | 3105 | cancel_cutthrough_connection("error writing spoolfile"); |
059ec3d9 PH |
3106 | |
3107 | if (smtp_input) | |
3108 | { | |
3109 | if (input_error) | |
3110 | smtp_reply = US"451 Error while reading input data"; | |
3111 | else | |
3112 | { | |
3113 | smtp_reply = US"451 Error while writing spool file"; | |
3114 | receive_swallow_smtp(); | |
3115 | } | |
3116 | message_id[0] = 0; /* Indicate no message accepted */ | |
3117 | goto TIDYUP; /* Skip to end of function */ | |
3118 | } | |
3119 | ||
3120 | else | |
3121 | { | |
3122 | fseek(data_file, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3123 | give_local_error(ERRMESS_IOERR, msg, US"", error_rc, data_file, | |
3124 | header_list); | |
3125 | /* Does not return */ | |
3126 | } | |
3127 | } | |
3128 | ||
3129 | ||
3130 | /* No I/O errors were encountered while writing the data file. */ | |
3131 | ||
3132 | DEBUG(D_receive) debug_printf("Data file written for message %s\n", message_id); | |
3133 | ||
3134 | ||
3135 | /* If there were any bad addresses extracted by -t, or there were no recipients | |
3136 | left after -t, send a message to the sender of this message, or write it to | |
3137 | stderr if the error handling option is set that way. Note that there may | |
3138 | legitimately be no recipients for an SMTP message if they have all been removed | |
3139 | by "discard". | |
3140 | ||
3141 | We need to rewind the data file in order to read it. In the case of no | |
3142 | recipients or stderr error writing, throw the data file away afterwards, and | |
3143 | exit. (This can't be SMTP, which always ensures there's at least one | |
3144 | syntactically good recipient address.) */ | |
3145 | ||
3146 | if (extract_recip && (bad_addresses != NULL || recipients_count == 0)) | |
3147 | { | |
3148 | DEBUG(D_receive) | |
3149 | { | |
3150 | if (recipients_count == 0) debug_printf("*** No recipients\n"); | |
3151 | if (bad_addresses != NULL) | |
3152 | { | |
3153 | error_block *eblock = bad_addresses; | |
3154 | debug_printf("*** Bad address(es)\n"); | |
3155 | while (eblock != NULL) | |
3156 | { | |
3157 | debug_printf(" %s: %s\n", eblock->text1, eblock->text2); | |
3158 | eblock = eblock->next; | |
3159 | } | |
3160 | } | |
3161 | } | |
3162 | ||
3163 | fseek(data_file, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3164 | ||
3165 | /* If configured to send errors to the sender, but this fails, force | |
3166 | a failure error code. We use a special one for no recipients so that it | |
3167 | can be detected by the autoreply transport. Otherwise error_rc is set to | |
3168 | errors_sender_rc, which is EXIT_FAILURE unless -oee was given, in which case | |
3169 | it is EXIT_SUCCESS. */ | |
3170 | ||
3171 | if (error_handling == ERRORS_SENDER) | |
3172 | { | |
3173 | if (!moan_to_sender( | |
3174 | (bad_addresses == NULL)? | |
3175 | (extracted_ignored? ERRMESS_IGADDRESS : ERRMESS_NOADDRESS) : | |
3176 | (recipients_list == NULL)? ERRMESS_BADNOADDRESS : ERRMESS_BADADDRESS, | |
3177 | bad_addresses, header_list, data_file, FALSE)) | |
3178 | error_rc = (bad_addresses == NULL)? EXIT_NORECIPIENTS : EXIT_FAILURE; | |
3179 | } | |
3180 | else | |
3181 | { | |
3182 | if (bad_addresses == NULL) | |
3183 | { | |
3184 | if (extracted_ignored) | |
3185 | fprintf(stderr, "exim: all -t recipients overridden by command line\n"); | |
3186 | else | |
3187 | fprintf(stderr, "exim: no recipients in message\n"); | |
3188 | } | |
3189 | else | |
3190 | { | |
3191 | fprintf(stderr, "exim: invalid address%s", | |
3192 | (bad_addresses->next == NULL)? ":" : "es:\n"); | |
3193 | while (bad_addresses != NULL) | |
3194 | { | |
3195 | fprintf(stderr, " %s: %s\n", bad_addresses->text1, | |
3196 | bad_addresses->text2); | |
3197 | bad_addresses = bad_addresses->next; | |
3198 | } | |
3199 | } | |
3200 | } | |
3201 | ||
3202 | if (recipients_count == 0 || error_handling == ERRORS_STDERR) | |
3203 | { | |
3204 | Uunlink(spool_name); | |
f1e894f3 | 3205 | (void)fclose(data_file); |
059ec3d9 PH |
3206 | exim_exit(error_rc); |
3207 | } | |
3208 | } | |
3209 | ||
3210 | /* Data file successfully written. Generate text for the Received: header by | |
3211 | expanding the configured string, and adding a timestamp. By leaving this | |
3212 | operation till now, we ensure that the timestamp is the time that message | |
3213 | reception was completed. However, this is deliberately done before calling the | |
3214 | data ACL and local_scan(). | |
3215 | ||
3216 | This Received: header may therefore be inspected by the data ACL and by code in | |
3217 | the local_scan() function. When they have run, we update the timestamp to be | |
3218 | the final time of reception. | |
3219 | ||
3220 | If there is just one recipient, set up its value in the $received_for variable | |
3221 | for use when we generate the Received: header. | |
3222 | ||
3223 | Note: the checking for too many Received: headers is handled by the delivery | |
3224 | code. */ | |
e4bdf652 | 3225 | /*XXX eventually add excess Received: check for cutthrough case back when classifying them */ |
059ec3d9 | 3226 | |
e4bdf652 | 3227 | if (received_header->text == NULL) /* Non-cutthrough case */ |
059ec3d9 | 3228 | { |
e4bdf652 | 3229 | received_header_gen(); |
059ec3d9 | 3230 | |
e4bdf652 | 3231 | /* Set the value of message_body_size for the DATA ACL and for local_scan() */ |
059ec3d9 | 3232 | |
e4bdf652 JH |
3233 | message_body_size = (fstat(data_fd, &statbuf) == 0)? |
3234 | statbuf.st_size - SPOOL_DATA_START_OFFSET : -1; | |
059ec3d9 | 3235 | |
e4bdf652 JH |
3236 | /* If an ACL from any RCPT commands set up any warning headers to add, do so |
3237 | now, before running the DATA ACL. */ | |
059ec3d9 | 3238 | |
578d43dc | 3239 | add_acl_headers(ACL_WHERE_RCPT, US"MAIL or RCPT"); |
e4bdf652 | 3240 | } |
817d9f57 | 3241 | else |
e4bdf652 JH |
3242 | message_body_size = (fstat(data_fd, &statbuf) == 0)? |
3243 | statbuf.st_size - SPOOL_DATA_START_OFFSET : -1; | |
059ec3d9 PH |
3244 | |
3245 | /* If an ACL is specified for checking things at this stage of reception of a | |
3246 | message, run it, unless all the recipients were removed by "discard" in earlier | |
3247 | ACLs. That is the only case in which recipients_count can be zero at this | |
3248 | stage. Set deliver_datafile to point to the data file so that $message_body and | |
3249 | $message_body_end can be extracted if needed. Allow $recipients in expansions. | |
3250 | */ | |
3251 | ||
3252 | deliver_datafile = data_fd; | |
4e88a19f | 3253 | user_msg = NULL; |
059ec3d9 | 3254 | |
0e20aff9 MH |
3255 | enable_dollar_recipients = TRUE; |
3256 | ||
059ec3d9 | 3257 | if (recipients_count == 0) |
7e3ce68e JH |
3258 | blackholed_by = recipients_discarded ? US"MAIL ACL" : US"RCPT ACL"; |
3259 | ||
059ec3d9 PH |
3260 | else |
3261 | { | |
059ec3d9 PH |
3262 | /* Handle interactive SMTP messages */ |
3263 | ||
3264 | if (smtp_input && !smtp_batched_input) | |
3265 | { | |
8523533c | 3266 | |
80a47a2c TK |
3267 | #ifndef DISABLE_DKIM |
3268 | if (!dkim_disable_verify) | |
3269 | { | |
3270 | /* Finish verification, this will log individual signature results to | |
3271 | the mainlog */ | |
3272 | dkim_exim_verify_finish(); | |
3273 | ||
3274 | /* Check if we must run the DKIM ACL */ | |
7e3ce68e | 3275 | if (acl_smtp_dkim && dkim_verify_signers && *dkim_verify_signers) |
80a47a2c TK |
3276 | { |
3277 | uschar *dkim_verify_signers_expanded = | |
3278 | expand_string(dkim_verify_signers); | |
7e3ce68e | 3279 | if (!dkim_verify_signers_expanded) |
80a47a2c TK |
3280 | log_write(0, LOG_MAIN|LOG_PANIC, |
3281 | "expansion of dkim_verify_signers option failed: %s", | |
3282 | expand_string_message); | |
7e3ce68e | 3283 | |
80a47a2c TK |
3284 | else |
3285 | { | |
3286 | int sep = 0; | |
55414b25 | 3287 | const uschar *ptr = dkim_verify_signers_expanded; |
80a47a2c | 3288 | uschar *item = NULL; |
9e5d6b55 TK |
3289 | uschar *seen_items = NULL; |
3290 | int seen_items_size = 0; | |
3291 | int seen_items_offset = 0; | |
9122af94 TK |
3292 | /* Default to OK when no items are present */ |
3293 | rc = OK; | |
7e3ce68e | 3294 | while ((item = string_nextinlist(&ptr, &sep, NULL, 0))) |
80a47a2c | 3295 | { |
6119d1ea | 3296 | /* Prevent running ACL for an empty item */ |
7e3ce68e | 3297 | if (!item || !*item) continue; |
5032d1cf JH |
3298 | |
3299 | /* Only run ACL once for each domain or identity, | |
3300 | no matter how often it appears in the expanded list. */ | |
3301 | if (seen_items) | |
6119d1ea | 3302 | { |
ae9094bf | 3303 | uschar *seen_item = NULL; |
55414b25 | 3304 | const uschar *seen_items_list = seen_items; |
5032d1cf | 3305 | BOOL seen_this_item = FALSE; |
61147df4 | 3306 | |
ae9094bf | 3307 | while ((seen_item = string_nextinlist(&seen_items_list, &sep, |
7e3ce68e | 3308 | NULL, 0))) |
5032d1cf JH |
3309 | if (Ustrcmp(seen_item,item) == 0) |
3310 | { | |
3311 | seen_this_item = TRUE; | |
3312 | break; | |
3313 | } | |
3314 | ||
3315 | if (seen_this_item) | |
6119d1ea TK |
3316 | { |
3317 | DEBUG(D_receive) | |
5032d1cf JH |
3318 | debug_printf("acl_smtp_dkim: skipping signer %s, " |
3319 | "already seen\n", item); | |
6119d1ea TK |
3320 | continue; |
3321 | } | |
61147df4 | 3322 | |
5032d1cf JH |
3323 | seen_items = string_append(seen_items, &seen_items_size, |
3324 | &seen_items_offset, 1, ":"); | |
6119d1ea TK |
3325 | } |
3326 | ||
5032d1cf JH |
3327 | seen_items = string_append(seen_items, &seen_items_size, |
3328 | &seen_items_offset, 1, item); | |
4a73449b | 3329 | seen_items[seen_items_offset] = '\0'; |
6119d1ea TK |
3330 | |
3331 | DEBUG(D_receive) | |
5032d1cf JH |
3332 | debug_printf("calling acl_smtp_dkim for dkim_cur_signer=%s\n", |
3333 | item); | |
6119d1ea | 3334 | |
80a47a2c | 3335 | dkim_exim_acl_setup(item); |
5032d1cf JH |
3336 | rc = acl_check(ACL_WHERE_DKIM, NULL, acl_smtp_dkim, |
3337 | &user_msg, &log_msg); | |
6119d1ea TK |
3338 | |
3339 | if (rc != OK) | |
5032d1cf JH |
3340 | { |
3341 | DEBUG(D_receive) | |
3342 | debug_printf("acl_smtp_dkim: acl_check returned %d on %s, " | |
3343 | "skipping remaining items\n", rc, item); | |
3344 | cancel_cutthrough_connection("dkim acl not ok"); | |
3345 | break; | |
3346 | } | |
80a47a2c | 3347 | } |
578d43dc | 3348 | add_acl_headers(ACL_WHERE_DKIM, US"DKIM"); |
80a47a2c TK |
3349 | if (rc == DISCARD) |
3350 | { | |
3351 | recipients_count = 0; | |
3352 | blackholed_by = US"DKIM ACL"; | |
3353 | if (log_msg != NULL) | |
3354 | blackhole_log_msg = string_sprintf(": %s", log_msg); | |
3355 | } | |
3356 | else if (rc != OK) | |
3357 | { | |
3358 | Uunlink(spool_name); | |
3359 | if (smtp_handle_acl_fail(ACL_WHERE_DKIM, rc, user_msg, log_msg) != 0) | |
85ffcba6 | 3360 | smtp_yield = FALSE; /* No more messages after dropped connection */ |
80a47a2c TK |
3361 | smtp_reply = US""; /* Indicate reply already sent */ |
3362 | message_id[0] = 0; /* Indicate no message accepted */ | |
3363 | goto TIDYUP; /* Skip to end of function */ | |
3364 | } | |
3365 | } | |
3366 | } | |
3367 | } | |
4a8ce2d8 | 3368 | #endif /* DISABLE_DKIM */ |
fb2274d4 | 3369 | |
8523533c | 3370 | #ifdef WITH_CONTENT_SCAN |
80a47a2c TK |
3371 | if (recipients_count > 0 && |
3372 | acl_smtp_mime != NULL && | |
54cdb463 PH |
3373 | !run_mime_acl(acl_smtp_mime, &smtp_yield, &smtp_reply, &blackholed_by)) |
3374 | goto TIDYUP; | |
8523533c TK |
3375 | #endif /* WITH_CONTENT_SCAN */ |
3376 | ||
4840604e TL |
3377 | #ifdef EXPERIMENTAL_DMARC |
3378 | dmarc_up = dmarc_store_data(from_header); | |
3379 | #endif /* EXPERIMENTAL_DMARC */ | |
3380 | ||
8ccd00b1 JH |
3381 | #ifndef DISABLE_PRDR |
3382 | if (prdr_requested && recipients_count > 1 && acl_smtp_data_prdr) | |
fd98a5c6 JH |
3383 | { |
3384 | unsigned int c; | |
3385 | int all_pass = OK; | |
3386 | int all_fail = FAIL; | |
3387 | ||
3388 | smtp_printf("353 PRDR content analysis beginning\r\n"); | |
3389 | /* Loop through recipients, responses must be in same order received */ | |
3390 | for (c = 0; recipients_count > c; c++) | |
3391 | { | |
3392 | uschar * addr= recipients_list[c].address; | |
3393 | uschar * msg= US"PRDR R=<%s> %s"; | |
3394 | uschar * code; | |
3395 | DEBUG(D_receive) | |
3396 | debug_printf("PRDR processing recipient %s (%d of %d)\n", | |
3397 | addr, c+1, recipients_count); | |
3398 | rc = acl_check(ACL_WHERE_PRDR, addr, | |
3399 | acl_smtp_data_prdr, &user_msg, &log_msg); | |
3400 | ||
3401 | /* If any recipient rejected content, indicate it in final message */ | |
3402 | all_pass |= rc; | |
3403 | /* If all recipients rejected, indicate in final message */ | |
3404 | all_fail &= rc; | |
3405 | ||
3406 | switch (rc) | |
3407 | { | |
3408 | case OK: case DISCARD: code = US"250"; break; | |
3409 | case DEFER: code = US"450"; break; | |
3410 | default: code = US"550"; break; | |
3411 | } | |
3412 | if (user_msg != NULL) | |
3413 | smtp_user_msg(code, user_msg); | |
3414 | else | |
3415 | { | |
3416 | switch (rc) | |
3417 | { | |
3418 | case OK: case DISCARD: | |
3419 | msg = string_sprintf(CS msg, addr, "acceptance"); break; | |
3420 | case DEFER: | |
3421 | msg = string_sprintf(CS msg, addr, "temporary refusal"); break; | |
3422 | default: | |
3423 | msg = string_sprintf(CS msg, addr, "refusal"); break; | |
3424 | } | |
3425 | smtp_user_msg(code, msg); | |
3426 | } | |
3427 | if (log_msg) log_write(0, LOG_MAIN, "PRDR %s %s", addr, log_msg); | |
3428 | else if (user_msg) log_write(0, LOG_MAIN, "PRDR %s %s", addr, user_msg); | |
112b6a93 | 3429 | else log_write(0, LOG_MAIN, "%s", CS msg); |
fd98a5c6 JH |
3430 | |
3431 | if (rc != OK) { receive_remove_recipient(addr); c--; } | |
3432 | } | |
3433 | /* Set up final message, used if data acl gives OK */ | |
3434 | smtp_reply = string_sprintf("%s id=%s message %s", | |
3435 | all_fail == FAIL ? US"550" : US"250", | |
3436 | message_id, | |
3437 | all_fail == FAIL | |
3438 | ? US"rejected for all recipients" | |
3439 | : all_pass == OK | |
3440 | ? US"accepted" | |
3441 | : US"accepted for some recipients"); | |
3442 | if (recipients_count == 0) | |
3443 | { | |
3444 | message_id[0] = 0; /* Indicate no message accepted */ | |
3445 | goto TIDYUP; | |
3446 | } | |
3447 | } | |
3448 | else | |
3449 | prdr_requested = FALSE; | |
8ccd00b1 | 3450 | #endif /* !DISABLE_PRDR */ |
fd98a5c6 | 3451 | |
54cdb463 PH |
3452 | /* Check the recipients count again, as the MIME ACL might have changed |
3453 | them. */ | |
8523533c | 3454 | |
059ec3d9 PH |
3455 | if (acl_smtp_data != NULL && recipients_count > 0) |
3456 | { | |
059ec3d9 | 3457 | rc = acl_check(ACL_WHERE_DATA, NULL, acl_smtp_data, &user_msg, &log_msg); |
578d43dc | 3458 | add_acl_headers(ACL_WHERE_DATA, US"DATA"); |
059ec3d9 PH |
3459 | if (rc == DISCARD) |
3460 | { | |
3461 | recipients_count = 0; | |
3462 | blackholed_by = US"DATA ACL"; | |
8e669ac1 PH |
3463 | if (log_msg != NULL) |
3464 | blackhole_log_msg = string_sprintf(": %s", log_msg); | |
2e5b33cd | 3465 | cancel_cutthrough_connection("data acl discard"); |
059ec3d9 PH |
3466 | } |
3467 | else if (rc != OK) | |
3468 | { | |
3469 | Uunlink(spool_name); | |
2e5b33cd | 3470 | cancel_cutthrough_connection("data acl not ok"); |
8523533c TK |
3471 | #ifdef WITH_CONTENT_SCAN |
3472 | unspool_mbox(); | |
6f0c431a PP |
3473 | #endif |
3474 | #ifdef EXPERIMENTAL_DCC | |
3475 | dcc_ok = 0; | |
8523533c | 3476 | #endif |
059ec3d9 | 3477 | if (smtp_handle_acl_fail(ACL_WHERE_DATA, rc, user_msg, log_msg) != 0) |
85ffcba6 | 3478 | smtp_yield = FALSE; /* No more messages after dropped connection */ |
059ec3d9 PH |
3479 | smtp_reply = US""; /* Indicate reply already sent */ |
3480 | message_id[0] = 0; /* Indicate no message accepted */ | |
3481 | goto TIDYUP; /* Skip to end of function */ | |
3482 | } | |
3483 | } | |
3484 | } | |
3485 | ||
3486 | /* Handle non-SMTP and batch SMTP (i.e. non-interactive) messages. Note that | |
3487 | we cannot take different actions for permanent and temporary rejections. */ | |
3488 | ||
54cdb463 | 3489 | else |
059ec3d9 | 3490 | { |
54cdb463 PH |
3491 | |
3492 | #ifdef WITH_CONTENT_SCAN | |
3493 | if (acl_not_smtp_mime != NULL && | |
3494 | !run_mime_acl(acl_not_smtp_mime, &smtp_yield, &smtp_reply, | |
3495 | &blackholed_by)) | |
3496 | goto TIDYUP; | |
3497 | #endif /* WITH_CONTENT_SCAN */ | |
3498 | ||
3499 | if (acl_not_smtp != NULL) | |
059ec3d9 | 3500 | { |
54cdb463 PH |
3501 | uschar *user_msg, *log_msg; |
3502 | rc = acl_check(ACL_WHERE_NOTSMTP, NULL, acl_not_smtp, &user_msg, &log_msg); | |
3503 | if (rc == DISCARD) | |
059ec3d9 | 3504 | { |
54cdb463 PH |
3505 | recipients_count = 0; |
3506 | blackholed_by = US"non-SMTP ACL"; | |
3507 | if (log_msg != NULL) | |
3508 | blackhole_log_msg = string_sprintf(": %s", log_msg); | |
059ec3d9 | 3509 | } |
54cdb463 | 3510 | else if (rc != OK) |
059ec3d9 | 3511 | { |
54cdb463 PH |
3512 | Uunlink(spool_name); |
3513 | #ifdef WITH_CONTENT_SCAN | |
3514 | unspool_mbox(); | |
6f0c431a PP |
3515 | #endif |
3516 | #ifdef EXPERIMENTAL_DCC | |
3517 | dcc_ok = 0; | |
54cdb463 | 3518 | #endif |
6ea85e9a PH |
3519 | /* The ACL can specify where rejections are to be logged, possibly |
3520 | nowhere. The default is main and reject logs. */ | |
3521 | ||
3522 | if (log_reject_target != 0) | |
3523 | log_write(0, log_reject_target, "F=<%s> rejected by non-SMTP ACL: %s", | |
3524 | sender_address, log_msg); | |
3525 | ||
54cdb463 PH |
3526 | if (user_msg == NULL) user_msg = US"local configuration problem"; |
3527 | if (smtp_batched_input) | |
3528 | { | |
3529 | moan_smtp_batch(NULL, "%d %s", 550, user_msg); | |
3530 | /* Does not return */ | |
3531 | } | |
3532 | else | |
3533 | { | |
3534 | fseek(data_file, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3535 | give_local_error(ERRMESS_LOCAL_ACL, user_msg, | |
3536 | US"message rejected by non-SMTP ACL: ", error_rc, data_file, | |
3537 | header_list); | |
3538 | /* Does not return */ | |
3539 | } | |
059ec3d9 | 3540 | } |
578d43dc | 3541 | add_acl_headers(ACL_WHERE_NOTSMTP, US"non-SMTP"); |
059ec3d9 | 3542 | } |
059ec3d9 PH |
3543 | } |
3544 | ||
54cdb463 PH |
3545 | /* The applicable ACLs have been run */ |
3546 | ||
059ec3d9 PH |
3547 | if (deliver_freeze) frozen_by = US"ACL"; /* for later logging */ |
3548 | if (queue_only_policy) queued_by = US"ACL"; | |
059ec3d9 PH |
3549 | } |
3550 | ||
8523533c TK |
3551 | #ifdef WITH_CONTENT_SCAN |
3552 | unspool_mbox(); | |
3553 | #endif | |
3554 | ||
6a8f9482 TK |
3555 | #ifdef EXPERIMENTAL_DCC |
3556 | dcc_ok = 0; | |
3557 | #endif | |
3558 | ||
3559 | ||
059ec3d9 PH |
3560 | /* The final check on the message is to run the scan_local() function. The |
3561 | version supplied with Exim always accepts, but this is a hook for sysadmins to | |
3562 | supply their own checking code. The local_scan() function is run even when all | |
3563 | the recipients have been discarded. */ | |
3564 | ||
3565 | lseek(data_fd, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3566 | ||
3567 | /* Arrange to catch crashes in local_scan(), so that the -D file gets | |
3568 | deleted, and the incident gets logged. */ | |
3569 | ||
3570 | os_non_restarting_signal(SIGSEGV, local_scan_crash_handler); | |
3571 | os_non_restarting_signal(SIGFPE, local_scan_crash_handler); | |
3572 | os_non_restarting_signal(SIGILL, local_scan_crash_handler); | |
3573 | os_non_restarting_signal(SIGBUS, local_scan_crash_handler); | |
3574 | ||
3575 | DEBUG(D_receive) debug_printf("calling local_scan(); timeout=%d\n", | |
3576 | local_scan_timeout); | |
3577 | local_scan_data = NULL; | |
3578 | ||
3579 | os_non_restarting_signal(SIGALRM, local_scan_timeout_handler); | |
3580 | if (local_scan_timeout > 0) alarm(local_scan_timeout); | |
3581 | rc = local_scan(data_fd, &local_scan_data); | |
3582 | alarm(0); | |
3583 | os_non_restarting_signal(SIGALRM, sigalrm_handler); | |
3584 | ||
0e20aff9 MH |
3585 | enable_dollar_recipients = FALSE; |
3586 | ||
059ec3d9 PH |
3587 | store_pool = POOL_MAIN; /* In case changed */ |
3588 | DEBUG(D_receive) debug_printf("local_scan() returned %d %s\n", rc, | |
3589 | local_scan_data); | |
3590 | ||
3591 | os_non_restarting_signal(SIGSEGV, SIG_DFL); | |
3592 | os_non_restarting_signal(SIGFPE, SIG_DFL); | |
3593 | os_non_restarting_signal(SIGILL, SIG_DFL); | |
3594 | os_non_restarting_signal(SIGBUS, SIG_DFL); | |
3595 | ||
3596 | /* The length check is paranoia against some runaway code, and also because | |
3597 | (for a success return) lines in the spool file are read into big_buffer. */ | |
3598 | ||
3599 | if (local_scan_data != NULL) | |
3600 | { | |
3601 | int len = Ustrlen(local_scan_data); | |
3602 | if (len > LOCAL_SCAN_MAX_RETURN) len = LOCAL_SCAN_MAX_RETURN; | |
3603 | local_scan_data = string_copyn(local_scan_data, len); | |
3604 | } | |
3605 | ||
3606 | if (rc == LOCAL_SCAN_ACCEPT_FREEZE) | |
3607 | { | |
58eb016e | 3608 | if (!deliver_freeze) /* ACL might have already frozen */ |
059ec3d9 PH |
3609 | { |
3610 | deliver_freeze = TRUE; | |
3611 | deliver_frozen_at = time(NULL); | |
3612 | frozen_by = US"local_scan()"; | |
3613 | } | |
3614 | rc = LOCAL_SCAN_ACCEPT; | |
3615 | } | |
3616 | else if (rc == LOCAL_SCAN_ACCEPT_QUEUE) | |
3617 | { | |
3618 | if (!queue_only_policy) /* ACL might have already queued */ | |
3619 | { | |
3620 | queue_only_policy = TRUE; | |
3621 | queued_by = US"local_scan()"; | |
3622 | } | |
3623 | rc = LOCAL_SCAN_ACCEPT; | |
3624 | } | |
3625 | ||
3626 | /* Message accepted: remove newlines in local_scan_data because otherwise | |
3627 | the spool file gets corrupted. Ensure that all recipients are qualified. */ | |
3628 | ||
3629 | if (rc == LOCAL_SCAN_ACCEPT) | |
3630 | { | |
3631 | if (local_scan_data != NULL) | |
3632 | { | |
3633 | uschar *s; | |
3634 | for (s = local_scan_data; *s != 0; s++) if (*s == '\n') *s = ' '; | |
3635 | } | |
3636 | for (i = 0; i < recipients_count; i++) | |
3637 | { | |
3638 | recipient_item *r = recipients_list + i; | |
3639 | r->address = rewrite_address_qualify(r->address, TRUE); | |
3640 | if (r->errors_to != NULL) | |
3641 | r->errors_to = rewrite_address_qualify(r->errors_to, TRUE); | |
3642 | } | |
3643 | if (recipients_count == 0 && blackholed_by == NULL) | |
3644 | blackholed_by = US"local_scan"; | |
3645 | } | |
3646 | ||
3647 | /* Message rejected: newlines permitted in local_scan_data to generate | |
3648 | multiline SMTP responses. */ | |
3649 | ||
3650 | else | |
3651 | { | |
3652 | uschar *istemp = US""; | |
3653 | uschar *s = NULL; | |
a5bd321b | 3654 | uschar *smtp_code; |
059ec3d9 PH |
3655 | int size = 0; |
3656 | int sptr = 0; | |
059ec3d9 PH |
3657 | |
3658 | errmsg = local_scan_data; | |
3659 | ||
3660 | Uunlink(spool_name); /* Cancel this message */ | |
3661 | switch(rc) | |
3662 | { | |
3663 | default: | |
3664 | log_write(0, LOG_MAIN, "invalid return %d from local_scan(). Temporary " | |
3665 | "rejection given", rc); | |
3666 | goto TEMPREJECT; | |
3667 | ||
3668 | case LOCAL_SCAN_REJECT_NOLOGHDR: | |
6c6d6e48 | 3669 | BIT_CLEAR(log_selector, log_selector_size, Li_rejected_header); |
059ec3d9 PH |
3670 | /* Fall through */ |
3671 | ||
3672 | case LOCAL_SCAN_REJECT: | |
a5bd321b | 3673 | smtp_code = US"550"; |
059ec3d9 PH |
3674 | if (errmsg == NULL) errmsg = US"Administrative prohibition"; |
3675 | break; | |
3676 | ||
3677 | case LOCAL_SCAN_TEMPREJECT_NOLOGHDR: | |
6c6d6e48 | 3678 | BIT_CLEAR(log_selector, log_selector_size, Li_rejected_header); |
059ec3d9 PH |
3679 | /* Fall through */ |
3680 | ||
3681 | case LOCAL_SCAN_TEMPREJECT: | |
3682 | TEMPREJECT: | |
a5bd321b | 3683 | smtp_code = US"451"; |
059ec3d9 PH |
3684 | if (errmsg == NULL) errmsg = US"Temporary local problem"; |
3685 | istemp = US"temporarily "; | |
3686 | break; | |
3687 | } | |
3688 | ||
3689 | s = string_append(s, &size, &sptr, 2, US"F=", | |
3690 | (sender_address[0] == 0)? US"<>" : sender_address); | |
3691 | s = add_host_info_for_log(s, &size, &sptr); | |
3692 | s[sptr] = 0; | |
3693 | ||
3694 | log_write(0, LOG_MAIN|LOG_REJECT, "%s %srejected by local_scan(): %.256s", | |
3695 | s, istemp, string_printing(errmsg)); | |
3696 | ||
3697 | if (smtp_input) | |
3698 | { | |
3699 | if (!smtp_batched_input) | |
3700 | { | |
a5bd321b | 3701 | smtp_respond(smtp_code, 3, TRUE, errmsg); |
059ec3d9 PH |
3702 | message_id[0] = 0; /* Indicate no message accepted */ |
3703 | smtp_reply = US""; /* Indicate reply already sent */ | |
3704 | goto TIDYUP; /* Skip to end of function */ | |
3705 | } | |
3706 | else | |
3707 | { | |
a5bd321b | 3708 | moan_smtp_batch(NULL, "%s %s", smtp_code, errmsg); |
059ec3d9 PH |
3709 | /* Does not return */ |
3710 | } | |
3711 | } | |
3712 | else | |
3713 | { | |
3714 | fseek(data_file, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3715 | give_local_error(ERRMESS_LOCAL_SCAN, errmsg, | |
3716 | US"message rejected by local scan code: ", error_rc, data_file, | |
3717 | header_list); | |
3718 | /* Does not return */ | |
3719 | } | |
3720 | } | |
3721 | ||
3722 | /* Reset signal handlers to ignore signals that previously would have caused | |
3723 | the message to be abandoned. */ | |
3724 | ||
3725 | signal(SIGTERM, SIG_IGN); | |
3726 | signal(SIGINT, SIG_IGN); | |
3727 | ||
e4bdf652 | 3728 | |
059ec3d9 PH |
3729 | /* Ensure the first time flag is set in the newly-received message. */ |
3730 | ||
3731 | deliver_firsttime = TRUE; | |
3732 | ||
8523533c | 3733 | #ifdef EXPERIMENTAL_BRIGHTMAIL |
a2da3176 JH |
3734 | if (bmi_run == 1) |
3735 | { /* rewind data file */ | |
8523533c TK |
3736 | lseek(data_fd, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); |
3737 | bmi_verdicts = bmi_process_message(header_list, data_fd); | |
a2da3176 | 3738 | } |
8523533c TK |
3739 | #endif |
3740 | ||
4c04137d | 3741 | /* Update the timestamp in our Received: header to account for any time taken by |
059ec3d9 PH |
3742 | an ACL or by local_scan(). The new time is the time that all reception |
3743 | processing is complete. */ | |
3744 | ||
3745 | timestamp = expand_string(US"${tod_full}"); | |
3746 | tslen = Ustrlen(timestamp); | |
3747 | ||
3748 | memcpy(received_header->text + received_header->slen - tslen - 1, | |
3749 | timestamp, tslen); | |
3750 | ||
3751 | /* In MUA wrapper mode, ignore queueing actions set by ACL or local_scan() */ | |
3752 | ||
3753 | if (mua_wrapper) | |
3754 | { | |
3755 | deliver_freeze = FALSE; | |
3756 | queue_only_policy = FALSE; | |
3757 | } | |
3758 | ||
3759 | /* Keep the data file open until we have written the header file, in order to | |
3760 | hold onto the lock. In a -bh run, or if the message is to be blackholed, we | |
3761 | don't write the header file, and we unlink the data file. If writing the header | |
3762 | file fails, we have failed to accept this message. */ | |
3763 | ||
3764 | if (host_checking || blackholed_by != NULL) | |
3765 | { | |
3766 | header_line *h; | |
3767 | Uunlink(spool_name); | |
3768 | msg_size = 0; /* Compute size for log line */ | |
3769 | for (h = header_list; h != NULL; h = h->next) | |
3770 | if (h->type != '*') msg_size += h->slen; | |
3771 | } | |
3772 | ||
3773 | /* Write the -H file */ | |
3774 | ||
3775 | else | |
059ec3d9 PH |
3776 | if ((msg_size = spool_write_header(message_id, SW_RECEIVING, &errmsg)) < 0) |
3777 | { | |
3778 | log_write(0, LOG_MAIN, "Message abandoned: %s", errmsg); | |
3779 | Uunlink(spool_name); /* Lose the data file */ | |
3780 | ||
3781 | if (smtp_input) | |
3782 | { | |
3783 | smtp_reply = US"451 Error in writing spool file"; | |
3784 | message_id[0] = 0; /* Indicate no message accepted */ | |
3785 | goto TIDYUP; | |
3786 | } | |
3787 | else | |
3788 | { | |
3789 | fseek(data_file, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3790 | give_local_error(ERRMESS_IOERR, errmsg, US"", error_rc, data_file, | |
3791 | header_list); | |
3792 | /* Does not return */ | |
3793 | } | |
3794 | } | |
059ec3d9 PH |
3795 | |
3796 | ||
3797 | /* The message has now been successfully received. */ | |
3798 | ||
3799 | receive_messagecount++; | |
3800 | ||
3801 | /* In SMTP sessions we may receive several in one connection. After each one, | |
3802 | we wait for the clock to tick at the level of message-id granularity. This is | |
3803 | so that the combination of time+pid is unique, even on systems where the pid | |
3804 | can be re-used within our time interval. We can't shorten the interval without | |
3805 | re-designing the message-id. See comments above where the message id is | |
3806 | created. This is Something For The Future. */ | |
3807 | ||
3808 | message_id_tv.tv_usec = (message_id_tv.tv_usec/id_resolution) * id_resolution; | |
3809 | exim_wait_tick(&message_id_tv, id_resolution); | |
3810 | ||
3811 | /* Add data size to written header size. We do not count the initial file name | |
3812 | that is in the file, but we do add one extra for the notional blank line that | |
3813 | precedes the data. This total differs from message_size in that it include the | |
3814 | added Received: header and any other headers that got created locally. */ | |
3815 | ||
3816 | fflush(data_file); | |
3817 | fstat(data_fd, &statbuf); | |
3818 | ||
3819 | msg_size += statbuf.st_size - SPOOL_DATA_START_OFFSET + 1; | |
3820 | ||
3821 | /* Generate a "message received" log entry. We do this by building up a dynamic | |
3822 | string as required. Since we commonly want to add two items at a time, use a | |
3823 | macro to simplify the coding. We log the arrival of a new message while the | |
3824 | file is still locked, just in case the machine is *really* fast, and delivers | |
3825 | it first! Include any message id that is in the message - since the syntax of a | |
4c04137d | 3826 | message id is actually an addr-spec, we can use the parse routine to canonicalize |
059ec3d9 PH |
3827 | it. */ |
3828 | ||
3829 | size = 256; | |
3830 | sptr = 0; | |
3831 | s = store_get(size); | |
3832 | ||
27b9e5f4 JH |
3833 | s = string_append(s, &size, &sptr, 2, |
3834 | fake_response == FAIL ? US"(= " : US"<= ", | |
3835 | sender_address[0] == 0 ? US"<>" : sender_address); | |
3836 | if (message_reference) | |
059ec3d9 PH |
3837 | s = string_append(s, &size, &sptr, 2, US" R=", message_reference); |
3838 | ||
3839 | s = add_host_info_for_log(s, &size, &sptr); | |
3840 | ||
3841 | #ifdef SUPPORT_TLS | |
6c6d6e48 | 3842 | if (LOGGING(tls_cipher) && tls_in.cipher) |
817d9f57 | 3843 | s = string_append(s, &size, &sptr, 2, US" X=", tls_in.cipher); |
6c6d6e48 | 3844 | if (LOGGING(tls_certificate_verified) && tls_in.cipher) |
059ec3d9 | 3845 | s = string_append(s, &size, &sptr, 2, US" CV=", |
27b9e5f4 | 3846 | tls_in.certificate_verified ? "yes":"no"); |
6c6d6e48 | 3847 | if (LOGGING(tls_peerdn) && tls_in.peerdn) |
48ed62d9 | 3848 | s = string_append(s, &size, &sptr, 3, US" DN=\"", |
817d9f57 | 3849 | string_printing(tls_in.peerdn), US"\""); |
6c6d6e48 | 3850 | if (LOGGING(tls_sni) && tls_in.sni) |
3f0945ff | 3851 | s = string_append(s, &size, &sptr, 3, US" SNI=\"", |
817d9f57 | 3852 | string_printing(tls_in.sni), US"\""); |
3f0945ff | 3853 | #endif |
059ec3d9 | 3854 | |
8ccd00b1 | 3855 | if (sender_host_authenticated) |
059ec3d9 PH |
3856 | { |
3857 | s = string_append(s, &size, &sptr, 2, US" A=", sender_host_authenticated); | |
27b9e5f4 | 3858 | if (authenticated_id) |
c8e2fc1e | 3859 | { |
059ec3d9 | 3860 | s = string_append(s, &size, &sptr, 2, US":", authenticated_id); |
27b9e5f4 | 3861 | if (LOGGING(smtp_mailauth) && authenticated_sender) |
c8e2fc1e JH |
3862 | s = string_append(s, &size, &sptr, 2, US":", authenticated_sender); |
3863 | } | |
059ec3d9 PH |
3864 | } |
3865 | ||
8ccd00b1 | 3866 | #ifndef DISABLE_PRDR |
fd98a5c6 | 3867 | if (prdr_requested) |
7e3ce68e | 3868 | s = string_catn(s, &size, &sptr, US" PRDR", 5); |
fd98a5c6 | 3869 | #endif |
8ccd00b1 | 3870 | |
cee5f132 | 3871 | #ifdef SUPPORT_PROXY |
6c6d6e48 | 3872 | if (proxy_session && LOGGING(proxy)) |
e6d2a989 | 3873 | s = string_append(s, &size, &sptr, 2, US" PRX=", proxy_local_address); |
a3c86431 | 3874 | #endif |
fd98a5c6 | 3875 | |
7e3ce68e JH |
3876 | if (chunking_state > CHUNKING_OFFERED) |
3877 | s = string_catn(s, &size, &sptr, US" K", 2); | |
3878 | ||
059ec3d9 PH |
3879 | sprintf(CS big_buffer, "%d", msg_size); |
3880 | s = string_append(s, &size, &sptr, 2, US" S=", big_buffer); | |
3881 | ||
3c0a92dc JH |
3882 | /* log 8BITMIME mode announced in MAIL_FROM |
3883 | 0 ... no BODY= used | |
3884 | 7 ... 7BIT | |
3885 | 8 ... 8BITMIME */ | |
6c6d6e48 | 3886 | if (LOGGING(8bitmime)) |
c8e2fc1e | 3887 | { |
3c0a92dc JH |
3888 | sprintf(CS big_buffer, "%d", body_8bitmime); |
3889 | s = string_append(s, &size, &sptr, 2, US" M8S=", big_buffer); | |
c8e2fc1e | 3890 | } |
3c0a92dc | 3891 | |
afa6d3ad JH |
3892 | if (*queue_name) |
3893 | s = string_append(s, &size, &sptr, 2, US" Q=", queue_name); | |
3894 | ||
059ec3d9 PH |
3895 | /* If an addr-spec in a message-id contains a quoted string, it can contain |
3896 | any characters except " \ and CR and so in particular it can contain NL! | |
3897 | Therefore, make sure we use a printing-characters only version for the log. | |
3898 | Also, allow for domain literals in the message id. */ | |
3899 | ||
27b9e5f4 | 3900 | if (msgid_header) |
059ec3d9 PH |
3901 | { |
3902 | uschar *old_id; | |
3903 | BOOL save_allow_domain_literals = allow_domain_literals; | |
3904 | allow_domain_literals = TRUE; | |
3905 | old_id = parse_extract_address(Ustrchr(msgid_header->text, ':') + 1, | |
3906 | &errmsg, &start, &end, &domain, FALSE); | |
3907 | allow_domain_literals = save_allow_domain_literals; | |
3908 | if (old_id != NULL) | |
3909 | s = string_append(s, &size, &sptr, 2, US" id=", string_printing(old_id)); | |
3910 | } | |
3911 | ||
3912 | /* If subject logging is turned on, create suitable printing-character | |
3913 | text. By expanding $h_subject: we make use of the MIME decoding. */ | |
3914 | ||
6c6d6e48 | 3915 | if (LOGGING(subject) && subject_header != NULL) |
059ec3d9 PH |
3916 | { |
3917 | int i; | |
3918 | uschar *p = big_buffer; | |
3919 | uschar *ss = expand_string(US"$h_subject:"); | |
3920 | ||
3921 | /* Backslash-quote any double quotes or backslashes so as to make a | |
3922 | a C-like string, and turn any non-printers into escape sequences. */ | |
3923 | ||
3924 | *p++ = '\"'; | |
3925 | if (*ss != 0) for (i = 0; i < 100 && ss[i] != 0; i++) | |
3926 | { | |
3927 | if (ss[i] == '\"' || ss[i] == '\\') *p++ = '\\'; | |
3928 | *p++ = ss[i]; | |
3929 | } | |
3930 | *p++ = '\"'; | |
3931 | *p = 0; | |
3932 | s = string_append(s, &size, &sptr, 2, US" T=", string_printing(big_buffer)); | |
3933 | } | |
3934 | ||
3935 | /* Terminate the string: string_cat() and string_append() leave room, but do | |
3936 | not put the zero in. */ | |
3937 | ||
3938 | s[sptr] = 0; | |
3939 | ||
059ec3d9 PH |
3940 | /* Create a message log file if message logs are being used and this message is |
3941 | not blackholed. Write the reception stuff to it. We used to leave message log | |
e4bdf652 | 3942 | creation until the first delivery, but this has proved confusing for some |
059ec3d9 PH |
3943 | people. */ |
3944 | ||
3945 | if (message_logs && blackholed_by == NULL) | |
3946 | { | |
3947 | int fd; | |
3948 | ||
41313d92 | 3949 | spool_name = spool_fname(US"msglog", message_subdir, message_id, US""); |
a2da3176 JH |
3950 | |
3951 | if ( (fd = Uopen(spool_name, O_WRONLY|O_APPEND|O_CREAT, SPOOL_MODE)) < 0 | |
3952 | && errno == ENOENT | |
3953 | ) | |
059ec3d9 | 3954 | { |
41313d92 JH |
3955 | (void)directory_make(spool_directory, |
3956 | spool_sname(US"msglog", message_subdir), | |
3957 | MSGLOG_DIRECTORY_MODE, TRUE); | |
059ec3d9 PH |
3958 | fd = Uopen(spool_name, O_WRONLY|O_APPEND|O_CREAT, SPOOL_MODE); |
3959 | } | |
3960 | ||
3961 | if (fd < 0) | |
3962 | { | |
3963 | log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't open message log %s: %s", | |
3964 | spool_name, strerror(errno)); | |
3965 | } | |
3966 | ||
3967 | else | |
3968 | { | |
3969 | FILE *message_log = fdopen(fd, "a"); | |
3970 | if (message_log == NULL) | |
3971 | { | |
3972 | log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't fdopen message log %s: %s", | |
3973 | spool_name, strerror(errno)); | |
f1e894f3 | 3974 | (void)close(fd); |
059ec3d9 PH |
3975 | } |
3976 | else | |
3977 | { | |
3978 | uschar *now = tod_stamp(tod_log); | |
3979 | fprintf(message_log, "%s Received from %s\n", now, s+3); | |
3980 | if (deliver_freeze) fprintf(message_log, "%s frozen by %s\n", now, | |
3981 | frozen_by); | |
3982 | if (queue_only_policy) fprintf(message_log, | |
e8012beb JH |
3983 | "%s no immediate delivery: queued%s%s by %s\n", now, |
3984 | *queue_name ? " in " : "", *queue_name ? CS queue_name : "", | |
3985 | queued_by); | |
f1e894f3 | 3986 | (void)fclose(message_log); |
059ec3d9 PH |
3987 | } |
3988 | } | |
3989 | } | |
3990 | ||
58eb016e PH |
3991 | /* Everything has now been done for a successful message except logging its |
3992 | arrival, and outputting an SMTP response. While writing to the log, set a flag | |
3993 | to cause a call to receive_bomb_out() if the log cannot be opened. */ | |
3994 | ||
3995 | receive_call_bombout = TRUE; | |
3996 | ||
563b63fa PH |
3997 | /* Before sending an SMTP response in a TCP/IP session, we check to see if the |
3998 | connection has gone away. This can only be done if there is no unconsumed input | |
3999 | waiting in the local input buffer. We can test for this by calling | |
4000 | receive_smtp_buffered(). RFC 2920 (pipelining) explicitly allows for additional | |
4001 | input to be sent following the final dot, so the presence of following input is | |
4002 | not an error. | |
58eb016e | 4003 | |
563b63fa PH |
4004 | If the connection is still present, but there is no unread input for the |
4005 | socket, the result of a select() call will be zero. If, however, the connection | |
4006 | has gone away, or if there is pending input, the result of select() will be | |
4007 | non-zero. The two cases can be distinguished by trying to read the next input | |
4008 | character. If we succeed, we can unread it so that it remains in the local | |
4009 | buffer for handling later. If not, the connection has been lost. | |
58eb016e | 4010 | |
563b63fa PH |
4011 | Of course, since TCP/IP is asynchronous, there is always a chance that the |
4012 | connection will vanish between the time of this test and the sending of the | |
4013 | response, but the chance of this happening should be small. */ | |
4014 | ||
4015 | if (smtp_input && sender_host_address != NULL && !sender_host_notsocket && | |
4016 | !receive_smtp_buffered()) | |
58eb016e PH |
4017 | { |
4018 | struct timeval tv; | |
4019 | fd_set select_check; | |
4020 | FD_ZERO(&select_check); | |
4021 | FD_SET(fileno(smtp_in), &select_check); | |
4022 | tv.tv_sec = 0; | |
4023 | tv.tv_usec = 0; | |
4024 | ||
563b63fa | 4025 | if (select(fileno(smtp_in) + 1, &select_check, NULL, NULL, &tv) != 0) |
58eb016e | 4026 | { |
80a47a2c TK |
4027 | int c = (receive_getc)(); |
4028 | if (c != EOF) (receive_ungetc)(c); else | |
58eb016e | 4029 | { |
eea0defe | 4030 | smtp_notquit_exit(US"connection-lost", NULL, NULL); |
563b63fa PH |
4031 | smtp_reply = US""; /* No attempt to send a response */ |
4032 | smtp_yield = FALSE; /* Nothing more on this connection */ | |
58eb016e | 4033 | |
563b63fa | 4034 | /* Re-use the log line workspace */ |
58eb016e | 4035 | |
563b63fa | 4036 | sptr = 0; |
eea0defe | 4037 | s = string_cat(s, &size, &sptr, US"SMTP connection lost after final dot"); |
563b63fa PH |
4038 | s = add_host_info_for_log(s, &size, &sptr); |
4039 | s[sptr] = 0; | |
4040 | log_write(0, LOG_MAIN, "%s", s); | |
58eb016e | 4041 | |
563b63fa | 4042 | /* Delete the files for this aborted message. */ |
58eb016e | 4043 | |
41313d92 JH |
4044 | Uunlink(spool_fname(US"input", message_subdir, message_id, US"-D")); |
4045 | Uunlink(spool_fname(US"input", message_subdir, message_id, US"-H")); | |
4046 | Uunlink(spool_fname(US"msglog", message_subdir, message_id, US"")); | |
58eb016e | 4047 | |
563b63fa PH |
4048 | goto TIDYUP; |
4049 | } | |
58eb016e PH |
4050 | } |
4051 | } | |
4052 | ||
4053 | /* The connection has not gone away; we really are going to take responsibility | |
4054 | for this message. */ | |
4055 | ||
817d9f57 | 4056 | /* Cutthrough - had sender last-dot; assume we've sent (or bufferred) all |
e4bdf652 JH |
4057 | data onward by now. |
4058 | ||
817d9f57 | 4059 | Send dot onward. If accepted, wipe the spooled files, log as delivered and accept |
e4bdf652 | 4060 | the sender's dot (below). |
4c04137d | 4061 | If rejected: copy response to sender, wipe the spooled files, log appropriately. |
ff5929e3 JH |
4062 | If temp-reject: normally accept to sender, keep the spooled file - unless defer=pass |
4063 | in which case pass temp-reject back to initiator and dump the files. | |
e4bdf652 JH |
4064 | |
4065 | Having the normal spool files lets us do data-filtering, and store/forward on temp-reject. | |
817d9f57 JH |
4066 | |
4067 | XXX We do not handle queue-only, freezing, or blackholes. | |
e4bdf652 | 4068 | */ |
5032d1cf | 4069 | if(cutthrough.fd >= 0) |
e4bdf652 | 4070 | { |
85ffcba6 | 4071 | uschar * msg= cutthrough_finaldot(); /* Ask the target system to accept the message */ |
817d9f57 | 4072 | /* Logging was done in finaldot() */ |
e4bdf652 | 4073 | switch(msg[0]) |
817d9f57 JH |
4074 | { |
4075 | case '2': /* Accept. Do the same to the source; dump any spoolfiles. */ | |
b784ce7f | 4076 | cutthrough_done = ACCEPTED; |
817d9f57 | 4077 | break; /* message_id needed for SMTP accept below */ |
61147df4 | 4078 | |
ff5929e3 JH |
4079 | case '4': /* Temp-reject. Keep spoolfiles and accept, unless defer-pass mode. |
4080 | ... for which, pass back the exact error */ | |
4081 | if (cutthrough.defer_pass) smtp_reply = string_copy_malloc(msg); | |
4082 | /*FALLTRHOUGH*/ | |
4083 | ||
817d9f57 | 4084 | default: /* Unknown response, or error. Treat as temp-reject. */ |
b784ce7f | 4085 | cutthrough_done = TMP_REJ; /* Avoid the usual immediate delivery attempt */ |
817d9f57 | 4086 | break; /* message_id needed for SMTP accept below */ |
61147df4 | 4087 | |
817d9f57 | 4088 | case '5': /* Perm-reject. Do the same to the source. Dump any spoolfiles */ |
ff5929e3 | 4089 | smtp_reply = string_copy_malloc(msg); /* Pass on the exact error */ |
b784ce7f | 4090 | cutthrough_done = PERM_REJ; |
817d9f57 JH |
4091 | break; |
4092 | } | |
e4bdf652 | 4093 | } |
58eb016e | 4094 | |
8ccd00b1 JH |
4095 | #ifndef DISABLE_PRDR |
4096 | if(!smtp_reply || prdr_requested) | |
4097 | #else | |
4098 | if(!smtp_reply) | |
fd98a5c6 | 4099 | #endif |
e4bdf652 JH |
4100 | { |
4101 | log_write(0, LOG_MAIN | | |
6c6d6e48 TF |
4102 | (LOGGING(received_recipients)? LOG_RECIPIENTS : 0) | |
4103 | (LOGGING(received_sender)? LOG_SENDER : 0), | |
e4bdf652 JH |
4104 | "%s", s); |
4105 | ||
4106 | /* Log any control actions taken by an ACL or local_scan(). */ | |
58eb016e | 4107 | |
e4bdf652 JH |
4108 | if (deliver_freeze) log_write(0, LOG_MAIN, "frozen by %s", frozen_by); |
4109 | if (queue_only_policy) log_write(L_delay_delivery, LOG_MAIN, | |
e8012beb JH |
4110 | "no immediate delivery: queued%s%s by %s", |
4111 | *queue_name ? " in " : "", *queue_name ? CS queue_name : "", | |
4112 | queued_by); | |
e4bdf652 JH |
4113 | } |
4114 | receive_call_bombout = FALSE; | |
58eb016e | 4115 | |
059ec3d9 PH |
4116 | store_reset(s); /* The store for the main log message can be reused */ |
4117 | ||
4118 | /* If the message is frozen, and freeze_tell is set, do the telling. */ | |
4119 | ||
4120 | if (deliver_freeze && freeze_tell != NULL && freeze_tell[0] != 0) | |
4121 | { | |
4122 | moan_tell_someone(freeze_tell, NULL, US"Message frozen on arrival", | |
4123 | "Message %s was frozen on arrival by %s.\nThe sender is <%s>.\n", | |
4124 | message_id, frozen_by, sender_address); | |
4125 | } | |
4126 | ||
4127 | ||
4128 | /* Either a message has been successfully received and written to the two spool | |
4129 | files, or an error in writing the spool has occurred for an SMTP message, or | |
58eb016e PH |
4130 | an SMTP message has been rejected for policy reasons. (For a non-SMTP message |
4131 | we will have already given up because there's no point in carrying on!) In | |
4132 | either event, we must now close (and thereby unlock) the data file. In the | |
059ec3d9 PH |
4133 | successful case, this leaves the message on the spool, ready for delivery. In |
4134 | the error case, the spool file will be deleted. Then tidy up store, interact | |
4135 | with an SMTP call if necessary, and return. | |
4136 | ||
4137 | A fflush() was done earlier in the expectation that any write errors on the | |
4138 | data file will be flushed(!) out thereby. Nevertheless, it is theoretically | |
4139 | possible for fclose() to fail - but what to do? What has happened to the lock | |
4140 | if this happens? */ | |
4141 | ||
e4bdf652 | 4142 | |
059ec3d9 | 4143 | TIDYUP: |
f1e894f3 PH |
4144 | process_info[process_info_len] = 0; /* Remove message id */ |
4145 | if (data_file != NULL) (void)fclose(data_file); /* Frees the lock */ | |
059ec3d9 PH |
4146 | |
4147 | /* Now reset signal handlers to their defaults */ | |
4148 | ||
4149 | signal(SIGTERM, SIG_DFL); | |
4150 | signal(SIGINT, SIG_DFL); | |
4151 | ||
4152 | /* Tell an SMTP caller the state of play, and arrange to return the SMTP return | |
4153 | value, which defaults TRUE - meaning there may be more incoming messages from | |
4154 | this connection. For non-SMTP callers (where there is only ever one message), | |
4155 | the default is FALSE. */ | |
4156 | ||
4157 | if (smtp_input) | |
4158 | { | |
4159 | yield = smtp_yield; | |
4160 | ||
4161 | /* Handle interactive SMTP callers. After several kinds of error, smtp_reply | |
58eb016e PH |
4162 | is set to the response that should be sent. When it is NULL, we generate |
4163 | default responses. After an ACL error or local_scan() error, the response has | |
4164 | already been sent, and smtp_reply is an empty string to indicate this. */ | |
059ec3d9 PH |
4165 | |
4166 | if (!smtp_batched_input) | |
4167 | { | |
27b9e5f4 | 4168 | if (!smtp_reply) |
059ec3d9 | 4169 | { |
29aba418 | 4170 | if (fake_response != OK) |
27b9e5f4 JH |
4171 | smtp_respond(fake_response == DEFER ? US"450" : US"550", |
4172 | 3, TRUE, fake_response_text); | |
4e88a19f PH |
4173 | |
4174 | /* An OK response is required; use "message" text if present. */ | |
4175 | ||
27b9e5f4 | 4176 | else if (user_msg) |
4e88a19f PH |
4177 | { |
4178 | uschar *code = US"250"; | |
4179 | int len = 3; | |
4f6ae5c3 | 4180 | smtp_message_code(&code, &len, &user_msg, NULL, TRUE); |
4e88a19f PH |
4181 | smtp_respond(code, len, TRUE, user_msg); |
4182 | } | |
4183 | ||
4184 | /* Default OK response */ | |
4185 | ||
7e3ce68e JH |
4186 | else if (chunking_state > CHUNKING_OFFERED) |
4187 | { | |
4188 | smtp_printf("250- %u byte chunk, total %d\r\n250 OK id=%s\r\n", | |
4189 | chunking_datasize, message_size+message_linecount, message_id); | |
4190 | chunking_state = CHUNKING_OFFERED; | |
4191 | } | |
8e669ac1 PH |
4192 | else |
4193 | smtp_printf("250 OK id=%s\r\n", message_id); | |
7e3ce68e | 4194 | |
059ec3d9 PH |
4195 | if (host_checking) |
4196 | fprintf(stdout, | |
4197 | "\n**** SMTP testing: that is not a real message id!\n\n"); | |
4198 | } | |
4e88a19f | 4199 | |
58eb016e | 4200 | /* smtp_reply is set non-empty */ |
4e88a19f | 4201 | |
8523533c | 4202 | else if (smtp_reply[0] != 0) |
29aba418 | 4203 | if (fake_response != OK && (smtp_reply[0] == '2')) |
a5bd321b PH |
4204 | smtp_respond((fake_response == DEFER)? US"450" : US"550", 3, TRUE, |
4205 | fake_response_text); | |
8e669ac1 | 4206 | else |
6951ac6c | 4207 | smtp_printf("%.1024s\r\n", smtp_reply); |
e4bdf652 | 4208 | |
817d9f57 JH |
4209 | switch (cutthrough_done) |
4210 | { | |
ff5929e3 JH |
4211 | case ACCEPTED: |
4212 | log_write(0, LOG_MAIN, "Completed");/* Delivery was done */ | |
41313d92 | 4213 | case PERM_REJ: |
ff5929e3 JH |
4214 | /* Delete spool files */ |
4215 | Uunlink(spool_fname(US"input", message_subdir, message_id, US"-D")); | |
4216 | Uunlink(spool_fname(US"input", message_subdir, message_id, US"-H")); | |
4217 | Uunlink(spool_fname(US"msglog", message_subdir, message_id, US"")); | |
4218 | message_id[0] = 0; /* Prevent a delivery from starting */ | |
4219 | break; | |
4220 | ||
4221 | case TMP_REJ: | |
4222 | if (cutthrough.defer_pass) | |
4223 | { | |
4224 | Uunlink(spool_fname(US"input", message_subdir, message_id, US"-D")); | |
4225 | Uunlink(spool_fname(US"input", message_subdir, message_id, US"-H")); | |
4226 | Uunlink(spool_fname(US"msglog", message_subdir, message_id, US"")); | |
4227 | } | |
4228 | message_id[0] = 0; /* Prevent a delivery from starting */ | |
4229 | default: | |
4230 | break; | |
e4bdf652 | 4231 | } |
5032d1cf | 4232 | cutthrough.delivery = FALSE; |
ff5929e3 | 4233 | cutthrough.defer_pass = FALSE; |
059ec3d9 PH |
4234 | } |
4235 | ||
4236 | /* For batched SMTP, generate an error message on failure, and do | |
4237 | nothing on success. The function moan_smtp_batch() does not return - | |
4238 | it exits from the program with a non-zero return code. */ | |
4239 | ||
27b9e5f4 JH |
4240 | else if (smtp_reply) |
4241 | moan_smtp_batch(NULL, "%s", smtp_reply); | |
059ec3d9 PH |
4242 | } |
4243 | ||
4244 | ||
4245 | /* If blackholing, we can immediately log this message's sad fate. The data | |
4246 | file has already been unlinked, and the header file was never written to disk. | |
4247 | We must now indicate that nothing was received, to prevent a delivery from | |
4248 | starting. */ | |
4249 | ||
27b9e5f4 | 4250 | if (blackholed_by) |
059ec3d9 | 4251 | { |
55414b25 JH |
4252 | const uschar *detail = local_scan_data |
4253 | ? string_printing(local_scan_data) | |
4254 | : string_sprintf("(%s discarded recipients)", blackholed_by); | |
04f7d5b9 | 4255 | log_write(0, LOG_MAIN, "=> blackhole %s%s", detail, blackhole_log_msg); |
059ec3d9 PH |
4256 | log_write(0, LOG_MAIN, "Completed"); |
4257 | message_id[0] = 0; | |
4258 | } | |
4259 | ||
4260 | /* Reset headers so that logging of rejects for a subsequent message doesn't | |
4261 | include them. It is also important to set header_last = NULL before exiting | |
4262 | from this function, as this prevents certain rewrites that might happen during | |
4263 | subsequent verifying (of another incoming message) from trying to add headers | |
4264 | when they shouldn't. */ | |
4265 | ||
4266 | header_list = header_last = NULL; | |
4267 | ||
4268 | return yield; /* TRUE if more messages (SMTP only) */ | |
4269 | } | |
4270 | ||
4271 | /* End of receive.c */ |