Commit | Line | Data |
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059ec3d9 PH |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
d4e5e70b | 5 | /* Copyright (c) University of Cambridge 1995 - 2017 */ |
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 | 27 | |
cff70eb1 | 28 | enum CH_STATE {LF_SEEN, MID_LINE, CR_SEEN}; |
059ec3d9 PH |
29 | |
30 | ||
31 | /************************************************* | |
32 | * Non-SMTP character reading functions * | |
33 | *************************************************/ | |
34 | ||
35 | /* These are the default functions that are set up in the variables such as | |
36 | receive_getc initially. They just call the standard functions, passing stdin as | |
37 | the file. (When SMTP input is occurring, different functions are used by | |
38 | changing the pointer variables.) */ | |
39 | ||
40 | int | |
bd8fbe36 | 41 | stdin_getc(unsigned lim) |
059ec3d9 PH |
42 | { |
43 | return getc(stdin); | |
44 | } | |
45 | ||
46 | int | |
47 | stdin_ungetc(int c) | |
48 | { | |
49 | return ungetc(c, stdin); | |
50 | } | |
51 | ||
52 | int | |
53 | stdin_feof(void) | |
54 | { | |
55 | return feof(stdin); | |
56 | } | |
57 | ||
58 | int | |
59 | stdin_ferror(void) | |
60 | { | |
61 | return ferror(stdin); | |
62 | } | |
63 | ||
64 | ||
65 | ||
66 | ||
67 | /************************************************* | |
68 | * Check that a set sender is allowed * | |
69 | *************************************************/ | |
70 | ||
71 | /* This function is called when a local caller sets an explicit sender address. | |
72 | It checks whether this is permitted, which it is for trusted callers. | |
73 | Otherwise, it must match the pattern(s) in untrusted_set_sender. | |
74 | ||
75 | Arguments: the proposed sender address | |
76 | Returns: TRUE for a trusted caller | |
77 | TRUE if the address has been set, untrusted_set_sender has been | |
78 | set, and the address matches something in the list | |
79 | FALSE otherwise | |
80 | */ | |
81 | ||
82 | BOOL | |
83 | receive_check_set_sender(uschar *newsender) | |
84 | { | |
85 | uschar *qnewsender; | |
86 | if (trusted_caller) return TRUE; | |
36d295f1 JH |
87 | if (!newsender || !untrusted_set_sender) return FALSE; |
88 | qnewsender = Ustrchr(newsender, '@') | |
89 | ? newsender : string_sprintf("%s@%s", newsender, qualify_domain_sender); | |
90 | return match_address_list_basic(qnewsender, CUSS &untrusted_set_sender, 0) == OK; | |
059ec3d9 PH |
91 | } |
92 | ||
93 | ||
94 | ||
95 | ||
96 | /************************************************* | |
5cb8cbc6 | 97 | * Read space info for a partition * |
059ec3d9 PH |
98 | *************************************************/ |
99 | ||
8e669ac1 PH |
100 | /* This function is called by receive_check_fs() below, and also by string |
101 | expansion for variables such as $spool_space. The field names for the statvfs | |
5cb8cbc6 PH |
102 | structure are macros, because not all OS have F_FAVAIL and it seems tidier to |
103 | have macros for F_BAVAIL and F_FILES as well. Some kinds of file system do not | |
104 | have inodes, and they return -1 for the number available. | |
059ec3d9 | 105 | |
5cb8cbc6 PH |
106 | Later: It turns out that some file systems that do not have the concept of |
107 | inodes return 0 rather than -1. Such systems should also return 0 for the total | |
8e669ac1 | 108 | number of inodes, so we require that to be greater than zero before returning |
5cb8cbc6 | 109 | an inode count. |
059ec3d9 | 110 | |
5cb8cbc6 PH |
111 | Arguments: |
112 | isspool TRUE for spool partition, FALSE for log partition | |
113 | inodeptr address of int to receive inode count; -1 if there isn't one | |
8e669ac1 | 114 | |
5cb8cbc6 | 115 | Returns: available on-root space, in kilobytes |
8e669ac1 PH |
116 | -1 for log partition if there isn't one |
117 | ||
118 | All values are -1 if the STATFS functions are not available. | |
059ec3d9 PH |
119 | */ |
120 | ||
8e669ac1 | 121 | int |
5cb8cbc6 | 122 | receive_statvfs(BOOL isspool, int *inodeptr) |
059ec3d9 PH |
123 | { |
124 | #ifdef HAVE_STATFS | |
059ec3d9 | 125 | struct STATVFS statbuf; |
ddf1b11a | 126 | struct stat dummy; |
5cb8cbc6 PH |
127 | uschar *path; |
128 | uschar *name; | |
129 | uschar buffer[1024]; | |
059ec3d9 | 130 | |
5cb8cbc6 | 131 | /* The spool directory must always exist. */ |
059ec3d9 | 132 | |
5cb8cbc6 | 133 | if (isspool) |
059ec3d9 | 134 | { |
8e669ac1 PH |
135 | path = spool_directory; |
136 | name = US"spool"; | |
137 | } | |
138 | ||
059ec3d9 PH |
139 | /* Need to cut down the log file path to the directory, and to ignore any |
140 | appearance of "syslog" in it. */ | |
141 | ||
5cb8cbc6 | 142 | else |
059ec3d9 | 143 | { |
059ec3d9 | 144 | int sep = ':'; /* Not variable - outside scripts use */ |
55414b25 | 145 | const uschar *p = log_file_path; |
8e669ac1 | 146 | name = US"log"; |
059ec3d9 PH |
147 | |
148 | /* An empty log_file_path means "use the default". This is the same as an | |
149 | empty item in a list. */ | |
150 | ||
151 | if (*p == 0) p = US":"; | |
55414b25 JH |
152 | while ((path = string_nextinlist(&p, &sep, buffer, sizeof(buffer)))) |
153 | if (Ustrcmp(path, "syslog") != 0) | |
154 | break; | |
059ec3d9 | 155 | |
5cb8cbc6 PH |
156 | if (path == NULL) /* No log files */ |
157 | { | |
8e669ac1 PH |
158 | *inodeptr = -1; |
159 | return -1; | |
160 | } | |
059ec3d9 | 161 | |
8e669ac1 PH |
162 | /* An empty string means use the default, which is in the spool directory. |
163 | But don't just use the spool directory, as it is possible that the log | |
5cb8cbc6 | 164 | subdirectory has been symbolically linked elsewhere. */ |
059ec3d9 | 165 | |
8e669ac1 | 166 | if (path[0] == 0) |
059ec3d9 | 167 | { |
5cb8cbc6 PH |
168 | sprintf(CS buffer, CS"%s/log", CS spool_directory); |
169 | path = buffer; | |
8e669ac1 PH |
170 | } |
171 | else | |
059ec3d9 | 172 | { |
8e669ac1 | 173 | uschar *cp; |
5cb8cbc6 | 174 | if ((cp = Ustrrchr(path, '/')) != NULL) *cp = 0; |
8e669ac1 | 175 | } |
5cb8cbc6 | 176 | } |
8e669ac1 | 177 | |
8f128379 | 178 | /* We now have the path; do the business */ |
5cb8cbc6 PH |
179 | |
180 | memset(&statbuf, 0, sizeof(statbuf)); | |
181 | ||
182 | if (STATVFS(CS path, &statbuf) != 0) | |
ddf1b11a JH |
183 | if (stat(CS path, &dummy) == -1 && errno == ENOENT) |
184 | { /* Can happen on first run after installation */ | |
185 | *inodeptr = -1; | |
186 | return -1; | |
187 | } | |
188 | else | |
189 | { | |
190 | log_write(0, LOG_MAIN|LOG_PANIC, "cannot accept message: failed to stat " | |
191 | "%s directory %s: %s", name, path, strerror(errno)); | |
192 | smtp_closedown(US"spool or log directory problem"); | |
193 | exim_exit(EXIT_FAILURE); | |
194 | } | |
8e669ac1 | 195 | |
5cb8cbc6 PH |
196 | *inodeptr = (statbuf.F_FILES > 0)? statbuf.F_FAVAIL : -1; |
197 | ||
198 | /* Disks are getting huge. Take care with computing the size in kilobytes. */ | |
8e669ac1 | 199 | |
5cb8cbc6 PH |
200 | return (int)(((double)statbuf.F_BAVAIL * (double)statbuf.F_FRSIZE)/1024.0); |
201 | ||
ddf1b11a | 202 | #else |
5cb8cbc6 PH |
203 | /* Unable to find partition sizes in this environment. */ |
204 | ||
5cb8cbc6 PH |
205 | *inodeptr = -1; |
206 | return -1; | |
207 | #endif | |
208 | } | |
209 | ||
059ec3d9 | 210 | |
059ec3d9 | 211 | |
5cb8cbc6 PH |
212 | |
213 | /************************************************* | |
214 | * Check space on spool and log partitions * | |
215 | *************************************************/ | |
216 | ||
217 | /* This function is called before accepting a message; if any thresholds are | |
218 | set, it checks them. If a message_size is supplied, it checks that there is | |
219 | enough space for that size plus the threshold - i.e. that the message won't | |
220 | reduce the space to the threshold. Not all OS have statvfs(); for those that | |
221 | don't, this function always returns TRUE. For some OS the old function and | |
222 | struct name statfs is used; that is handled by a macro, defined in exim.h. | |
223 | ||
224 | Arguments: | |
225 | msg_size the (estimated) size of an incoming message | |
226 | ||
227 | Returns: FALSE if there isn't enough space, or if the information cannot | |
228 | be obtained | |
229 | TRUE if no check was done or there is enough space | |
230 | */ | |
231 | ||
232 | BOOL | |
233 | receive_check_fs(int msg_size) | |
234 | { | |
235 | int space, inodes; | |
236 | ||
237 | if (check_spool_space > 0 || msg_size > 0 || check_spool_inodes > 0) | |
238 | { | |
8e669ac1 PH |
239 | space = receive_statvfs(TRUE, &inodes); |
240 | ||
059ec3d9 | 241 | DEBUG(D_receive) |
5cb8cbc6 PH |
242 | debug_printf("spool directory space = %dK inodes = %d " |
243 | "check_space = %dK inodes = %d msg_size = %d\n", | |
244 | space, inodes, check_spool_space, check_spool_inodes, msg_size); | |
8e669ac1 PH |
245 | |
246 | if ((space >= 0 && space < check_spool_space) || | |
5cb8cbc6 | 247 | (inodes >= 0 && inodes < check_spool_inodes)) |
8e669ac1 | 248 | { |
5cb8cbc6 PH |
249 | log_write(0, LOG_MAIN, "spool directory space check failed: space=%d " |
250 | "inodes=%d", space, inodes); | |
059ec3d9 PH |
251 | return FALSE; |
252 | } | |
253 | } | |
254 | ||
5cb8cbc6 PH |
255 | if (check_log_space > 0 || check_log_inodes > 0) |
256 | { | |
8e669ac1 PH |
257 | space = receive_statvfs(FALSE, &inodes); |
258 | ||
5cb8cbc6 PH |
259 | DEBUG(D_receive) |
260 | debug_printf("log directory space = %dK inodes = %d " | |
261 | "check_space = %dK inodes = %d\n", | |
262 | space, inodes, check_log_space, check_log_inodes); | |
8e669ac1 PH |
263 | |
264 | if ((space >= 0 && space < check_log_space) || | |
5cb8cbc6 | 265 | (inodes >= 0 && inodes < check_log_inodes)) |
8e669ac1 | 266 | { |
5cb8cbc6 PH |
267 | log_write(0, LOG_MAIN, "log directory space check failed: space=%d " |
268 | "inodes=%d", space, inodes); | |
269 | return FALSE; | |
270 | } | |
8e669ac1 PH |
271 | } |
272 | ||
059ec3d9 PH |
273 | return TRUE; |
274 | } | |
275 | ||
276 | ||
277 | ||
278 | /************************************************* | |
279 | * Bomb out while reading a message * | |
280 | *************************************************/ | |
281 | ||
282 | /* The common case of wanting to bomb out is if a SIGTERM or SIGINT is | |
283 | received, or if there is a timeout. A rarer case might be if the log files are | |
284 | screwed up and Exim can't open them to record a message's arrival. Handling | |
285 | that case is done by setting a flag to cause the log functions to call this | |
286 | function if there is an ultimate disaster. That is why it is globally | |
287 | accessible. | |
288 | ||
8f128379 PH |
289 | Arguments: |
290 | reason text reason to pass to the not-quit ACL | |
291 | msg default SMTP response to give if in an SMTP session | |
059ec3d9 PH |
292 | Returns: it doesn't |
293 | */ | |
294 | ||
295 | void | |
8f128379 | 296 | receive_bomb_out(uschar *reason, uschar *msg) |
059ec3d9 | 297 | { |
ead37e6c PP |
298 | static BOOL already_bombing_out; |
299 | /* The smtp_notquit_exit() below can call ACLs which can trigger recursive | |
300 | timeouts, if someone has something slow in their quit ACL. Since the only | |
301 | things we should be doing are to close down cleanly ASAP, on the second | |
302 | pass we also close down stuff that might be opened again, before bypassing | |
303 | the ACL call and exiting. */ | |
304 | ||
059ec3d9 PH |
305 | /* If spool_name is set, it contains the name of the data file that is being |
306 | written. Unlink it before closing so that it cannot be picked up by a delivery | |
307 | process. Ensure that any header file is also removed. */ | |
308 | ||
ead37e6c | 309 | if (spool_name[0] != '\0') |
059ec3d9 PH |
310 | { |
311 | Uunlink(spool_name); | |
312 | spool_name[Ustrlen(spool_name) - 1] = 'H'; | |
313 | Uunlink(spool_name); | |
ead37e6c | 314 | spool_name[0] = '\0'; |
059ec3d9 PH |
315 | } |
316 | ||
317 | /* Now close the file if it is open, either as a fd or a stream. */ | |
318 | ||
ead37e6c PP |
319 | if (data_file != NULL) |
320 | { | |
321 | (void)fclose(data_file); | |
322 | data_file = NULL; | |
323 | } else if (data_fd >= 0) { | |
324 | (void)close(data_fd); | |
325 | data_fd = -1; | |
326 | } | |
059ec3d9 | 327 | |
8f128379 PH |
328 | /* Attempt to close down an SMTP connection tidily. For non-batched SMTP, call |
329 | smtp_notquit_exit(), which runs the NOTQUIT ACL, if present, and handles the | |
330 | SMTP response. */ | |
059ec3d9 | 331 | |
ead37e6c | 332 | if (!already_bombing_out) |
059ec3d9 | 333 | { |
ead37e6c PP |
334 | already_bombing_out = TRUE; |
335 | if (smtp_input) | |
336 | { | |
337 | if (smtp_batched_input) | |
338 | moan_smtp_batch(NULL, "421 %s - message abandoned", msg); /* No return */ | |
339 | smtp_notquit_exit(reason, US"421", US"%s %s - closing connection.", | |
340 | smtp_active_hostname, msg); | |
341 | } | |
059ec3d9 PH |
342 | } |
343 | ||
344 | /* Exit from the program (non-BSMTP cases) */ | |
345 | ||
346 | exim_exit(EXIT_FAILURE); | |
347 | } | |
348 | ||
349 | ||
350 | /************************************************* | |
351 | * Data read timeout * | |
352 | *************************************************/ | |
353 | ||
354 | /* Handler function for timeouts that occur while reading the data that | |
355 | comprises a message. | |
356 | ||
357 | Argument: the signal number | |
358 | Returns: nothing | |
359 | */ | |
360 | ||
361 | static void | |
362 | data_timeout_handler(int sig) | |
363 | { | |
364 | uschar *msg = NULL; | |
365 | ||
366 | sig = sig; /* Keep picky compilers happy */ | |
367 | ||
368 | if (smtp_input) | |
369 | { | |
370 | msg = US"SMTP incoming data timeout"; | |
371 | log_write(L_lost_incoming_connection, | |
372 | LOG_MAIN, "SMTP data timeout (message abandoned) on connection " | |
fed77020 PH |
373 | "from %s F=<%s>", |
374 | (sender_fullhost != NULL)? sender_fullhost : US"local process", | |
375 | sender_address); | |
059ec3d9 PH |
376 | } |
377 | else | |
378 | { | |
379 | fprintf(stderr, "exim: timed out while reading - message abandoned\n"); | |
380 | log_write(L_lost_incoming_connection, | |
381 | LOG_MAIN, "timed out while reading local message"); | |
382 | } | |
383 | ||
8f128379 | 384 | receive_bomb_out(US"data-timeout", msg); /* Does not return */ |
059ec3d9 PH |
385 | } |
386 | ||
387 | ||
388 | ||
389 | /************************************************* | |
390 | * local_scan() timeout * | |
391 | *************************************************/ | |
392 | ||
393 | /* Handler function for timeouts that occur while running a local_scan() | |
394 | function. | |
395 | ||
396 | Argument: the signal number | |
397 | Returns: nothing | |
398 | */ | |
399 | ||
400 | static void | |
401 | local_scan_timeout_handler(int sig) | |
402 | { | |
403 | sig = sig; /* Keep picky compilers happy */ | |
404 | log_write(0, LOG_MAIN|LOG_REJECT, "local_scan() function timed out - " | |
405 | "message temporarily rejected (size %d)", message_size); | |
8f128379 PH |
406 | /* Does not return */ |
407 | receive_bomb_out(US"local-scan-timeout", US"local verification problem"); | |
059ec3d9 PH |
408 | } |
409 | ||
410 | ||
411 | ||
412 | /************************************************* | |
413 | * local_scan() crashed * | |
414 | *************************************************/ | |
415 | ||
416 | /* Handler function for signals that occur while running a local_scan() | |
417 | function. | |
418 | ||
419 | Argument: the signal number | |
420 | Returns: nothing | |
421 | */ | |
422 | ||
423 | static void | |
424 | local_scan_crash_handler(int sig) | |
425 | { | |
426 | log_write(0, LOG_MAIN|LOG_REJECT, "local_scan() function crashed with " | |
427 | "signal %d - message temporarily rejected (size %d)", sig, message_size); | |
8f128379 PH |
428 | /* Does not return */ |
429 | receive_bomb_out(US"local-scan-error", US"local verification problem"); | |
059ec3d9 PH |
430 | } |
431 | ||
432 | ||
433 | /************************************************* | |
434 | * SIGTERM or SIGINT received * | |
435 | *************************************************/ | |
436 | ||
437 | /* Handler for SIGTERM or SIGINT signals that occur while reading the | |
438 | data that comprises a message. | |
439 | ||
440 | Argument: the signal number | |
441 | Returns: nothing | |
442 | */ | |
443 | ||
444 | static void | |
445 | data_sigterm_sigint_handler(int sig) | |
446 | { | |
447 | uschar *msg = NULL; | |
448 | ||
449 | if (smtp_input) | |
450 | { | |
451 | msg = US"Service not available - SIGTERM or SIGINT received"; | |
452 | log_write(0, LOG_MAIN, "%s closed after %s", smtp_get_connection_info(), | |
453 | (sig == SIGTERM)? "SIGTERM" : "SIGINT"); | |
454 | } | |
455 | else | |
456 | { | |
f05da2e8 | 457 | if (filter_test == FTEST_NONE) |
059ec3d9 PH |
458 | { |
459 | fprintf(stderr, "\nexim: %s received - message abandoned\n", | |
460 | (sig == SIGTERM)? "SIGTERM" : "SIGINT"); | |
461 | log_write(0, LOG_MAIN, "%s received while reading local message", | |
462 | (sig == SIGTERM)? "SIGTERM" : "SIGINT"); | |
463 | } | |
464 | } | |
465 | ||
8f128379 | 466 | receive_bomb_out(US"signal-exit", msg); /* Does not return */ |
059ec3d9 PH |
467 | } |
468 | ||
469 | ||
470 | ||
471 | /************************************************* | |
472 | * Add new recipient to list * | |
473 | *************************************************/ | |
474 | ||
475 | /* This function builds a list of recipient addresses in argc/argv | |
476 | format. | |
477 | ||
478 | Arguments: | |
479 | recipient the next address to add to recipients_list | |
480 | pno parent number for fixed aliases; -1 otherwise | |
481 | ||
482 | Returns: nothing | |
483 | */ | |
484 | ||
485 | void | |
486 | receive_add_recipient(uschar *recipient, int pno) | |
487 | { | |
488 | if (recipients_count >= recipients_list_max) | |
489 | { | |
490 | recipient_item *oldlist = recipients_list; | |
491 | int oldmax = recipients_list_max; | |
492 | recipients_list_max = recipients_list_max? 2*recipients_list_max : 50; | |
493 | recipients_list = store_get(recipients_list_max * sizeof(recipient_item)); | |
494 | if (oldlist != NULL) | |
495 | memcpy(recipients_list, oldlist, oldmax * sizeof(recipient_item)); | |
496 | } | |
497 | ||
498 | recipients_list[recipients_count].address = recipient; | |
499 | recipients_list[recipients_count].pno = pno; | |
8523533c TK |
500 | #ifdef EXPERIMENTAL_BRIGHTMAIL |
501 | recipients_list[recipients_count].bmi_optin = bmi_current_optin; | |
502 | /* reset optin string pointer for next recipient */ | |
503 | bmi_current_optin = NULL; | |
504 | #endif | |
6c1c3d1d WB |
505 | recipients_list[recipients_count].orcpt = NULL; |
506 | recipients_list[recipients_count].dsn_flags = 0; | |
059ec3d9 PH |
507 | recipients_list[recipients_count++].errors_to = NULL; |
508 | } | |
509 | ||
510 | ||
511 | ||
512 | ||
fd98a5c6 JH |
513 | /************************************************* |
514 | * Send user response message * | |
515 | *************************************************/ | |
61147df4 | 516 | |
fd98a5c6 JH |
517 | /* This function is passed a default response code and a user message. It calls |
518 | smtp_message_code() to check and possibly modify the response code, and then | |
519 | calls smtp_respond() to transmit the response. I put this into a function | |
520 | just to avoid a lot of repetition. | |
61147df4 PP |
521 | |
522 | Arguments: | |
fd98a5c6 JH |
523 | code the response code |
524 | user_msg the user message | |
525 | ||
526 | Returns: nothing | |
61147df4 PP |
527 | */ |
528 | ||
8ccd00b1 | 529 | #ifndef DISABLE_PRDR |
61147df4 | 530 | static void |
fd98a5c6 | 531 | smtp_user_msg(uschar *code, uschar *user_msg) |
61147df4 | 532 | { |
fd98a5c6 | 533 | int len = 3; |
4f6ae5c3 | 534 | smtp_message_code(&code, &len, &user_msg, NULL, TRUE); |
fd98a5c6 | 535 | smtp_respond(code, len, TRUE, user_msg); |
61147df4 PP |
536 | } |
537 | #endif | |
538 | ||
539 | ||
540 | ||
541 | ||
fd98a5c6 | 542 | |
059ec3d9 PH |
543 | /************************************************* |
544 | * Remove a recipient from the list * | |
545 | *************************************************/ | |
546 | ||
547 | /* This function is provided for local_scan() to use. | |
548 | ||
549 | Argument: | |
550 | recipient address to remove | |
551 | ||
552 | Returns: TRUE if it did remove something; FALSE otherwise | |
553 | */ | |
554 | ||
555 | BOOL | |
556 | receive_remove_recipient(uschar *recipient) | |
557 | { | |
558 | int count; | |
559 | DEBUG(D_receive) debug_printf("receive_remove_recipient(\"%s\") called\n", | |
560 | recipient); | |
561 | for (count = 0; count < recipients_count; count++) | |
562 | { | |
563 | if (Ustrcmp(recipients_list[count].address, recipient) == 0) | |
564 | { | |
565 | if ((--recipients_count - count) > 0) | |
566 | memmove(recipients_list + count, recipients_list + count + 1, | |
54cdb463 | 567 | (recipients_count - count)*sizeof(recipient_item)); |
059ec3d9 PH |
568 | return TRUE; |
569 | } | |
570 | } | |
571 | return FALSE; | |
572 | } | |
573 | ||
574 | ||
575 | ||
576 | ||
577 | ||
578 | /************************************************* | |
579 | * Read data portion of a non-SMTP message * | |
580 | *************************************************/ | |
581 | ||
582 | /* This function is called to read the remainder of a message (following the | |
583 | header) when the input is not from SMTP - we are receiving a local message on | |
584 | a standard input stream. The message is always terminated by EOF, and is also | |
585 | terminated by a dot on a line by itself if the flag dot_ends is TRUE. Split the | |
586 | two cases for maximum efficiency. | |
587 | ||
588 | Ensure that the body ends with a newline. This will naturally be the case when | |
589 | the termination is "\n.\n" but may not be otherwise. The RFC defines messages | |
590 | as "sequences of lines" - this of course strictly applies only to SMTP, but | |
591 | deliveries into BSD-type mailbox files also require it. Exim used to have a | |
592 | flag for doing this at delivery time, but as it was always set for all | |
593 | transports, I decided to simplify things by putting the check here instead. | |
594 | ||
595 | There is at least one MUA (dtmail) that sends CRLF via this interface, and | |
596 | other programs are known to do this as well. Exim used to have a option for | |
597 | dealing with this: in July 2003, after much discussion, the code has been | |
598 | changed to default to treat any of LF, CRLF, and bare CR as line terminators. | |
599 | ||
600 | However, for the case when a dot on a line by itself terminates a message, the | |
601 | only recognized terminating sequences before and after the dot are LF and CRLF. | |
602 | Otherwise, having read EOL . CR, you don't know whether to read another | |
603 | character or not. | |
604 | ||
605 | Internally, in messages stored in Exim's spool files, LF is used as the line | |
606 | terminator. Under the new regime, bare CRs will no longer appear in these | |
607 | files. | |
608 | ||
609 | Arguments: | |
610 | fout a FILE to which to write the message | |
611 | ||
612 | Returns: One of the END_xxx values indicating why it stopped reading | |
613 | */ | |
614 | ||
615 | static int | |
616 | read_message_data(FILE *fout) | |
617 | { | |
618 | int ch_state; | |
619 | register int ch; | |
d677b2f2 | 620 | register int linelength = 0; |
059ec3d9 PH |
621 | |
622 | /* Handle the case when only EOF terminates the message */ | |
623 | ||
624 | if (!dot_ends) | |
625 | { | |
626 | register int last_ch = '\n'; | |
627 | ||
bd8fbe36 | 628 | for (; (ch = (receive_getc)(GETC_BUFFER_UNLIMITED)) != EOF; last_ch = ch) |
059ec3d9 PH |
629 | { |
630 | if (ch == 0) body_zerocount++; | |
631 | if (last_ch == '\r' && ch != '\n') | |
632 | { | |
d677b2f2 PH |
633 | if (linelength > max_received_linelength) |
634 | max_received_linelength = linelength; | |
635 | linelength = 0; | |
059ec3d9 PH |
636 | if (fputc('\n', fout) == EOF) return END_WERROR; |
637 | message_size++; | |
638 | body_linecount++; | |
639 | } | |
640 | if (ch == '\r') continue; | |
641 | ||
642 | if (fputc(ch, fout) == EOF) return END_WERROR; | |
d677b2f2 PH |
643 | if (ch == '\n') |
644 | { | |
645 | if (linelength > max_received_linelength) | |
646 | max_received_linelength = linelength; | |
647 | linelength = 0; | |
648 | body_linecount++; | |
649 | } | |
650 | else linelength++; | |
059ec3d9 PH |
651 | if (++message_size > thismessage_size_limit) return END_SIZE; |
652 | } | |
653 | ||
654 | if (last_ch != '\n') | |
655 | { | |
d677b2f2 PH |
656 | if (linelength > max_received_linelength) |
657 | max_received_linelength = linelength; | |
059ec3d9 PH |
658 | if (fputc('\n', fout) == EOF) return END_WERROR; |
659 | message_size++; | |
660 | body_linecount++; | |
661 | } | |
662 | ||
663 | return END_EOF; | |
664 | } | |
665 | ||
666 | /* Handle the case when a dot on a line on its own, or EOF, terminates. */ | |
667 | ||
668 | ch_state = 1; | |
669 | ||
bd8fbe36 | 670 | while ((ch = (receive_getc)(GETC_BUFFER_UNLIMITED)) != EOF) |
059ec3d9 PH |
671 | { |
672 | if (ch == 0) body_zerocount++; | |
673 | switch (ch_state) | |
674 | { | |
675 | case 0: /* Normal state (previous char written) */ | |
676 | if (ch == '\n') | |
d677b2f2 PH |
677 | { |
678 | body_linecount++; | |
679 | if (linelength > max_received_linelength) | |
680 | max_received_linelength = linelength; | |
681 | linelength = -1; | |
682 | ch_state = 1; | |
683 | } | |
059ec3d9 PH |
684 | else if (ch == '\r') |
685 | { ch_state = 2; continue; } | |
686 | break; | |
687 | ||
688 | case 1: /* After written "\n" */ | |
689 | if (ch == '.') { ch_state = 3; continue; } | |
6eb02f88 | 690 | if (ch == '\r') { ch_state = 2; continue; } |
3581f321 JH |
691 | if (ch == '\n') { body_linecount++; linelength = -1; } |
692 | else ch_state = 0; | |
059ec3d9 PH |
693 | break; |
694 | ||
695 | case 2: | |
696 | body_linecount++; /* After unwritten "\r" */ | |
d677b2f2 PH |
697 | if (linelength > max_received_linelength) |
698 | max_received_linelength = linelength; | |
059ec3d9 | 699 | if (ch == '\n') |
d677b2f2 PH |
700 | { |
701 | ch_state = 1; | |
702 | linelength = -1; | |
703 | } | |
059ec3d9 PH |
704 | else |
705 | { | |
706 | if (message_size++, fputc('\n', fout) == EOF) return END_WERROR; | |
707 | if (ch == '\r') continue; | |
708 | ch_state = 0; | |
d677b2f2 | 709 | linelength = 0; |
059ec3d9 PH |
710 | } |
711 | break; | |
712 | ||
713 | case 3: /* After "\n." (\n written, dot not) */ | |
714 | if (ch == '\n') return END_DOT; | |
715 | if (ch == '\r') { ch_state = 4; continue; } | |
716 | message_size++; | |
d677b2f2 | 717 | linelength++; |
059ec3d9 PH |
718 | if (fputc('.', fout) == EOF) return END_WERROR; |
719 | ch_state = 0; | |
720 | break; | |
721 | ||
722 | case 4: /* After "\n.\r" (\n written, rest not) */ | |
723 | if (ch == '\n') return END_DOT; | |
724 | message_size += 2; | |
725 | body_linecount++; | |
726 | if (fputs(".\n", fout) == EOF) return END_WERROR; | |
727 | if (ch == '\r') { ch_state = 2; continue; } | |
728 | ch_state = 0; | |
729 | break; | |
730 | } | |
731 | ||
d677b2f2 | 732 | linelength++; |
059ec3d9 PH |
733 | if (fputc(ch, fout) == EOF) return END_WERROR; |
734 | if (++message_size > thismessage_size_limit) return END_SIZE; | |
735 | } | |
736 | ||
737 | /* Get here if EOF read. Unless we have just written "\n", we need to ensure | |
738 | the message ends with a newline, and we must also write any characters that | |
739 | were saved up while testing for an ending dot. */ | |
740 | ||
741 | if (ch_state != 1) | |
742 | { | |
743 | static uschar *ends[] = { US"\n", NULL, US"\n", US".\n", US".\n" }; | |
744 | if (fputs(CS ends[ch_state], fout) == EOF) return END_WERROR; | |
745 | message_size += Ustrlen(ends[ch_state]); | |
746 | body_linecount++; | |
747 | } | |
748 | ||
749 | return END_EOF; | |
750 | } | |
751 | ||
752 | ||
753 | ||
754 | ||
755 | /************************************************* | |
756 | * Read data portion of an SMTP message * | |
757 | *************************************************/ | |
758 | ||
759 | /* This function is called to read the remainder of an SMTP message (after the | |
760 | headers), or to skip over it when an error has occurred. In this case, the | |
761 | output file is passed as NULL. | |
762 | ||
763 | If any line begins with a dot, that character is skipped. The input should only | |
764 | be successfully terminated by CR LF . CR LF unless it is local (non-network) | |
765 | SMTP, in which case the CRs are optional, but... | |
766 | ||
767 | FUDGE: It seems that sites on the net send out messages with just LF | |
768 | terminators, despite the warnings in the RFCs, and other MTAs handle this. So | |
769 | we make the CRs optional in all cases. | |
770 | ||
771 | July 2003: Bare CRs cause trouble. We now treat them as line terminators as | |
772 | well, so that there are no CRs in spooled messages. However, the message | |
773 | terminating dot is not recognized between two bare CRs. | |
774 | ||
775 | Arguments: | |
776 | fout a FILE to which to write the message; NULL if skipping | |
777 | ||
778 | Returns: One of the END_xxx values indicating why it stopped reading | |
779 | */ | |
780 | ||
781 | static int | |
782 | read_message_data_smtp(FILE *fout) | |
783 | { | |
784 | int ch_state = 0; | |
e4bdf652 | 785 | int ch; |
7e3ce68e | 786 | int linelength = 0; |
059ec3d9 | 787 | |
bd8fbe36 | 788 | while ((ch = (receive_getc)(GETC_BUFFER_UNLIMITED)) != EOF) |
059ec3d9 PH |
789 | { |
790 | if (ch == 0) body_zerocount++; | |
791 | switch (ch_state) | |
792 | { | |
793 | case 0: /* After LF or CRLF */ | |
794 | if (ch == '.') | |
795 | { | |
796 | ch_state = 3; | |
797 | continue; /* Don't ever write . after LF */ | |
798 | } | |
799 | ch_state = 1; | |
800 | ||
801 | /* Else fall through to handle as normal uschar. */ | |
802 | ||
803 | case 1: /* Normal state */ | |
804 | if (ch == '\n') | |
805 | { | |
806 | ch_state = 0; | |
807 | body_linecount++; | |
1f5497b2 PH |
808 | if (linelength > max_received_linelength) |
809 | max_received_linelength = linelength; | |
810 | linelength = -1; | |
059ec3d9 PH |
811 | } |
812 | else if (ch == '\r') | |
813 | { | |
814 | ch_state = 2; | |
815 | continue; | |
816 | } | |
817 | break; | |
818 | ||
819 | case 2: /* After (unwritten) CR */ | |
820 | body_linecount++; | |
1f5497b2 PH |
821 | if (linelength > max_received_linelength) |
822 | max_received_linelength = linelength; | |
823 | linelength = -1; | |
059ec3d9 PH |
824 | if (ch == '\n') |
825 | { | |
826 | ch_state = 0; | |
827 | } | |
828 | else | |
829 | { | |
830 | message_size++; | |
831 | if (fout != NULL && fputc('\n', fout) == EOF) return END_WERROR; | |
6851a9c5 | 832 | cutthrough_data_put_nl(); |
059ec3d9 PH |
833 | if (ch != '\r') ch_state = 1; else continue; |
834 | } | |
835 | break; | |
836 | ||
837 | case 3: /* After [CR] LF . */ | |
838 | if (ch == '\n') | |
839 | return END_DOT; | |
840 | if (ch == '\r') | |
841 | { | |
842 | ch_state = 4; | |
843 | continue; | |
844 | } | |
1bc460a6 JH |
845 | /* The dot was removed at state 3. For a doubled dot, here, reinstate |
846 | it to cutthrough. The current ch, dot or not, is passed both to cutthrough | |
847 | and to file below. */ | |
848 | if (ch == '.') | |
849 | { | |
850 | uschar c= ch; | |
6851a9c5 | 851 | cutthrough_data_puts(&c, 1); |
1bc460a6 JH |
852 | } |
853 | ch_state = 1; | |
059ec3d9 PH |
854 | break; |
855 | ||
856 | case 4: /* After [CR] LF . CR */ | |
857 | if (ch == '\n') return END_DOT; | |
858 | message_size++; | |
859 | body_linecount++; | |
860 | if (fout != NULL && fputc('\n', fout) == EOF) return END_WERROR; | |
6851a9c5 | 861 | cutthrough_data_put_nl(); |
059ec3d9 PH |
862 | if (ch == '\r') |
863 | { | |
864 | ch_state = 2; | |
865 | continue; | |
866 | } | |
867 | ch_state = 1; | |
868 | break; | |
869 | } | |
870 | ||
871 | /* Add the character to the spool file, unless skipping; then loop for the | |
872 | next. */ | |
873 | ||
874 | message_size++; | |
1f5497b2 | 875 | linelength++; |
7e3ce68e | 876 | if (fout) |
059ec3d9 PH |
877 | { |
878 | if (fputc(ch, fout) == EOF) return END_WERROR; | |
879 | if (message_size > thismessage_size_limit) return END_SIZE; | |
880 | } | |
e4bdf652 | 881 | if(ch == '\n') |
6851a9c5 | 882 | cutthrough_data_put_nl(); |
e4bdf652 JH |
883 | else |
884 | { | |
7e3ce68e | 885 | uschar c = ch; |
6851a9c5 | 886 | cutthrough_data_puts(&c, 1); |
e4bdf652 | 887 | } |
059ec3d9 PH |
888 | } |
889 | ||
890 | /* Fall through here if EOF encountered. This indicates some kind of error, | |
891 | since a correct message is terminated by [CR] LF . [CR] LF. */ | |
892 | ||
893 | return END_EOF; | |
894 | } | |
895 | ||
896 | ||
897 | ||
898 | ||
7e3ce68e | 899 | /* Variant of the above read_message_data_smtp() specialised for RFC 3030 |
1ebe15c3 JH |
900 | CHUNKING. Accept input lines separated by either CRLF or CR or LF and write |
901 | LF-delimited spoolfile. Until we have wireformat spoolfiles, we need the | |
902 | body_linecount accounting for proper re-expansion for the wire, so use | |
903 | a cut-down version of the state-machine above; we don't need to do leading-dot | |
904 | detection and unstuffing. | |
7e3ce68e JH |
905 | |
906 | Arguments: | |
544dd905 PP |
907 | fout a FILE to which to write the message; NULL if skipping; |
908 | must be open for both writing and reading. | |
7e3ce68e JH |
909 | |
910 | Returns: One of the END_xxx values indicating why it stopped reading | |
911 | */ | |
912 | ||
913 | static int | |
914 | read_message_bdat_smtp(FILE *fout) | |
915 | { | |
cff70eb1 HSHR |
916 | int linelength = 0, ch; |
917 | enum CH_STATE ch_state = LF_SEEN; | |
d953610f | 918 | BOOL fix_nl = FALSE; |
7e3ce68e | 919 | |
1ebe15c3 | 920 | for(;;) |
7e3ce68e | 921 | { |
7d758a6a | 922 | switch ((ch = bdat_getc(GETC_BUFFER_UNLIMITED))) |
1ebe15c3 JH |
923 | { |
924 | case EOF: return END_EOF; | |
1ebe15c3 | 925 | case ERR: return END_PROTOCOL; |
d953610f HSHR |
926 | case EOD: |
927 | /* Nothing to get from the sender anymore. We check the last | |
928 | character written to the spool. | |
929 | ||
930 | RFC 3030 states, that BDAT chunks are normal text, terminated by CRLF. | |
931 | If we would be strict, we would refuse such broken messages. | |
932 | But we are liberal, so we fix it. It would be easy just to append | |
933 | the "\n" to the spool. | |
934 | ||
935 | But there are some more things (line counting, message size calculation and such), | |
936 | that would need to be duplicated here. So we simply do some ungetc | |
937 | trickery. | |
938 | */ | |
59d98039 JH |
939 | if (fout) |
940 | { | |
941 | if (fseek(fout, -1, SEEK_CUR) < 0) return END_PROTOCOL; | |
942 | if (fgetc(fout) == '\n') return END_DOT; | |
943 | } | |
d953610f HSHR |
944 | |
945 | if (linelength == -1) /* \r already seen (see below) */ | |
946 | { | |
947 | DEBUG(D_receive) debug_printf("Add missing LF\n"); | |
948 | bdat_ungetc('\n'); | |
949 | continue; | |
950 | } | |
951 | DEBUG(D_receive) debug_printf("Add missing CRLF\n"); | |
952 | bdat_ungetc('\r'); /* not even \r was seen */ | |
953 | fix_nl = TRUE; | |
954 | ||
955 | continue; | |
1ebe15c3 JH |
956 | case '\0': body_zerocount++; break; |
957 | } | |
958 | switch (ch_state) | |
959 | { | |
cff70eb1 HSHR |
960 | case LF_SEEN: /* After LF or CRLF */ |
961 | ch_state = MID_LINE; | |
1ebe15c3 | 962 | /* fall through to handle as normal uschar. */ |
7e3ce68e | 963 | |
cff70eb1 | 964 | case MID_LINE: /* Mid-line state */ |
1ebe15c3 JH |
965 | if (ch == '\n') |
966 | { | |
cff70eb1 | 967 | ch_state = LF_SEEN; |
1ebe15c3 JH |
968 | body_linecount++; |
969 | if (linelength > max_received_linelength) | |
970 | max_received_linelength = linelength; | |
971 | linelength = -1; | |
972 | } | |
973 | else if (ch == '\r') | |
974 | { | |
cff70eb1 | 975 | ch_state = CR_SEEN; |
d953610f | 976 | if (fix_nl) bdat_ungetc('\n'); |
1ebe15c3 JH |
977 | continue; /* don't write CR */ |
978 | } | |
979 | break; | |
7e3ce68e | 980 | |
cff70eb1 | 981 | case CR_SEEN: /* After (unwritten) CR */ |
1ebe15c3 JH |
982 | body_linecount++; |
983 | if (linelength > max_received_linelength) | |
984 | max_received_linelength = linelength; | |
985 | linelength = -1; | |
986 | if (ch == '\n') | |
cff70eb1 | 987 | ch_state = LF_SEEN; |
1ebe15c3 JH |
988 | else |
989 | { | |
990 | message_size++; | |
59d98039 | 991 | if (fout && fputc('\n', fout) == EOF) return END_WERROR; |
6851a9c5 | 992 | cutthrough_data_put_nl(); |
1ebe15c3 | 993 | if (ch == '\r') continue; /* don't write CR */ |
cff70eb1 | 994 | ch_state = MID_LINE; |
1ebe15c3 JH |
995 | } |
996 | break; | |
997 | } | |
998 | ||
999 | /* Add the character to the spool file, unless skipping */ | |
1000 | ||
1001 | message_size++; | |
1002 | linelength++; | |
1003 | if (fout) | |
1004 | { | |
1005 | if (fputc(ch, fout) == EOF) return END_WERROR; | |
1006 | if (message_size > thismessage_size_limit) return END_SIZE; | |
1007 | } | |
1008 | if(ch == '\n') | |
6851a9c5 | 1009 | cutthrough_data_put_nl(); |
1ebe15c3 JH |
1010 | else |
1011 | { | |
1012 | uschar c = ch; | |
6851a9c5 | 1013 | cutthrough_data_puts(&c, 1); |
1ebe15c3 | 1014 | } |
7e3ce68e JH |
1015 | } |
1016 | /*NOTREACHED*/ | |
1017 | } | |
1018 | ||
328c5688 JH |
1019 | static int |
1020 | read_message_bdat_smtp_wire(FILE *fout) | |
1021 | { | |
1022 | int ch; | |
1023 | ||
1024 | /* Remember that this message uses wireformat. */ | |
1025 | ||
1026 | DEBUG(D_receive) debug_printf("CHUNKING: writing spoolfile in wire format\n"); | |
1027 | spool_file_wireformat = TRUE; | |
1028 | ||
0d81dabc | 1029 | for (;;) |
328c5688 | 1030 | { |
0d81dabc JH |
1031 | if (chunking_data_left > 0) |
1032 | { | |
1033 | unsigned len = MAX(chunking_data_left, thismessage_size_limit - message_size + 1); | |
1034 | uschar * buf = bdat_getbuf(&len); | |
328c5688 | 1035 | |
0d81dabc JH |
1036 | message_size += len; |
1037 | if (fout && fwrite(buf, len, 1, fout) != 1) return END_WERROR; | |
1038 | } | |
1039 | else switch (ch = bdat_getc(GETC_BUFFER_UNLIMITED)) | |
1040 | { | |
1041 | case EOF: return END_EOF; | |
1042 | case EOD: return END_DOT; | |
1043 | case ERR: return END_PROTOCOL; | |
1044 | ||
1045 | default: | |
1046 | message_size++; | |
1047 | /*XXX not done: | |
1048 | linelength | |
1049 | max_received_linelength | |
1050 | body_linecount | |
1051 | body_zerocount | |
1052 | */ | |
1053 | if (fout && fputc(ch, fout) == EOF) return END_WERROR; | |
1054 | break; | |
1055 | } | |
1056 | if (message_size > thismessage_size_limit) return END_SIZE; | |
328c5688 JH |
1057 | } |
1058 | /*NOTREACHED*/ | |
1059 | } | |
1060 | ||
7e3ce68e JH |
1061 | |
1062 | ||
1063 | ||
059ec3d9 PH |
1064 | /************************************************* |
1065 | * Swallow SMTP message * | |
1066 | *************************************************/ | |
1067 | ||
1068 | /* This function is called when there has been some kind of error while reading | |
1069 | an SMTP message, and the remaining data may need to be swallowed. It is global | |
1070 | because it is called from smtp_closedown() to shut down an incoming call | |
1071 | tidily. | |
1072 | ||
1073 | Argument: a FILE from which to read the message | |
1074 | Returns: nothing | |
1075 | */ | |
1076 | ||
1077 | void | |
1078 | receive_swallow_smtp(void) | |
1079 | { | |
7e3ce68e | 1080 | /*XXX CHUNKING: not enough. read chunks until RSET? */ |
059ec3d9 PH |
1081 | if (message_ended >= END_NOTENDED) |
1082 | message_ended = read_message_data_smtp(NULL); | |
1083 | } | |
1084 | ||
1085 | ||
1086 | ||
1087 | /************************************************* | |
1088 | * Handle lost SMTP connection * | |
1089 | *************************************************/ | |
1090 | ||
1091 | /* This function logs connection loss incidents and generates an appropriate | |
1092 | SMTP response. | |
1093 | ||
1094 | Argument: additional data for the message | |
1095 | Returns: the SMTP response | |
1096 | */ | |
1097 | ||
1098 | static uschar * | |
1099 | handle_lost_connection(uschar *s) | |
1100 | { | |
1101 | log_write(L_lost_incoming_connection | L_smtp_connection, LOG_MAIN, | |
1102 | "%s lost while reading message data%s", smtp_get_connection_info(), s); | |
eea0defe | 1103 | smtp_notquit_exit(US"connection-lost", NULL, NULL); |
059ec3d9 PH |
1104 | return US"421 Lost incoming connection"; |
1105 | } | |
1106 | ||
1107 | ||
1108 | ||
1109 | ||
1110 | /************************************************* | |
1111 | * Handle a non-smtp reception error * | |
1112 | *************************************************/ | |
1113 | ||
1114 | /* This function is called for various errors during the reception of non-SMTP | |
1115 | messages. It either sends a message to the sender of the problem message, or it | |
1116 | writes to the standard error stream. | |
1117 | ||
1118 | Arguments: | |
1119 | errcode code for moan_to_sender(), identifying the error | |
1120 | text1 first message text, passed to moan_to_sender() | |
1121 | text2 second message text, used only for stderrr | |
1122 | error_rc code to pass to exim_exit if no problem | |
1123 | f FILE containing body of message (may be stdin) | |
1124 | hptr pointer to instore headers or NULL | |
1125 | ||
1126 | Returns: calls exim_exit(), which does not return | |
1127 | */ | |
1128 | ||
1129 | static void | |
1130 | give_local_error(int errcode, uschar *text1, uschar *text2, int error_rc, | |
1131 | FILE *f, header_line *hptr) | |
1132 | { | |
1133 | if (error_handling == ERRORS_SENDER) | |
1134 | { | |
1135 | error_block eblock; | |
1136 | eblock.next = NULL; | |
1137 | eblock.text1 = text1; | |
37f3dc43 | 1138 | eblock.text2 = US""; |
059ec3d9 PH |
1139 | if (!moan_to_sender(errcode, &eblock, hptr, f, FALSE)) |
1140 | error_rc = EXIT_FAILURE; | |
1141 | } | |
37f3dc43 JH |
1142 | else |
1143 | fprintf(stderr, "exim: %s%s\n", text2, text1); /* Sic */ | |
f1e894f3 | 1144 | (void)fclose(f); |
059ec3d9 PH |
1145 | exim_exit(error_rc); |
1146 | } | |
1147 | ||
1148 | ||
1149 | ||
1150 | /************************************************* | |
1151 | * Add header lines set up by ACL * | |
1152 | *************************************************/ | |
1153 | ||
850635b6 PH |
1154 | /* This function is called to add the header lines that were set up by |
1155 | statements in an ACL to the list of headers in memory. It is done in two stages | |
1156 | like this, because when the ACL for RCPT is running, the other headers have not | |
1157 | yet been received. This function is called twice; once just before running the | |
1158 | DATA ACL, and once after. This is so that header lines added by MAIL or RCPT | |
1159 | are visible to the DATA ACL. | |
059ec3d9 PH |
1160 | |
1161 | Originally these header lines were added at the end. Now there is support for | |
1162 | three different places: top, bottom, and after the Received: header(s). There | |
1163 | will always be at least one Received: header, even if it is marked deleted, and | |
1164 | even if something else has been put in front of it. | |
1165 | ||
1166 | Arguments: | |
1167 | acl_name text to identify which ACL | |
1168 | ||
1169 | Returns: nothing | |
1170 | */ | |
1171 | ||
1172 | static void | |
578d43dc | 1173 | add_acl_headers(int where, uschar *acl_name) |
059ec3d9 PH |
1174 | { |
1175 | header_line *h, *next; | |
1176 | header_line *last_received = NULL; | |
e7568d51 | 1177 | |
578d43dc JH |
1178 | switch(where) |
1179 | { | |
1180 | case ACL_WHERE_DKIM: | |
1181 | case ACL_WHERE_MIME: | |
af4a1bca | 1182 | case ACL_WHERE_DATA: |
57cc2785 JH |
1183 | if ( cutthrough.fd >= 0 && cutthrough.delivery |
1184 | && (acl_removed_headers || acl_added_headers)) | |
578d43dc JH |
1185 | { |
1186 | log_write(0, LOG_MAIN|LOG_PANIC, "Header modification in data ACLs" | |
af4a1bca | 1187 | " will not take effect on cutthrough deliveries"); |
578d43dc JH |
1188 | return; |
1189 | } | |
1190 | } | |
1191 | ||
57cc2785 | 1192 | if (acl_removed_headers) |
e7568d51 | 1193 | { |
e1d04f48 | 1194 | DEBUG(D_receive|D_acl) debug_printf_indent(">>Headers removed by %s ACL:\n", acl_name); |
e7568d51 | 1195 | |
57cc2785 | 1196 | for (h = header_list; h; h = h->next) if (h->type != htype_old) |
e7568d51 | 1197 | { |
55414b25 | 1198 | const uschar * list = acl_removed_headers; |
e7568d51 TL |
1199 | int sep = ':'; /* This is specified as a colon-separated list */ |
1200 | uschar *s; | |
1201 | uschar buffer[128]; | |
4a142059 JH |
1202 | |
1203 | while ((s = string_nextinlist(&list, &sep, buffer, sizeof(buffer)))) | |
1204 | if (header_testname(h, s, Ustrlen(s), FALSE)) | |
e7568d51 TL |
1205 | { |
1206 | h->type = htype_old; | |
e1d04f48 | 1207 | DEBUG(D_receive|D_acl) debug_printf_indent(" %s", h->text); |
e7568d51 | 1208 | } |
e7568d51 TL |
1209 | } |
1210 | acl_removed_headers = NULL; | |
e1d04f48 | 1211 | DEBUG(D_receive|D_acl) debug_printf_indent(">>\n"); |
e7568d51 | 1212 | } |
059ec3d9 | 1213 | |
57cc2785 | 1214 | if (!acl_added_headers) return; |
e1d04f48 | 1215 | DEBUG(D_receive|D_acl) debug_printf_indent(">>Headers added by %s ACL:\n", acl_name); |
059ec3d9 | 1216 | |
57cc2785 | 1217 | for (h = acl_added_headers; h; h = next) |
059ec3d9 PH |
1218 | { |
1219 | next = h->next; | |
1220 | ||
1221 | switch(h->type) | |
1222 | { | |
1223 | case htype_add_top: | |
1224 | h->next = header_list; | |
1225 | header_list = h; | |
e1d04f48 | 1226 | DEBUG(D_receive|D_acl) debug_printf_indent(" (at top)"); |
059ec3d9 PH |
1227 | break; |
1228 | ||
1229 | case htype_add_rec: | |
1230 | if (last_received == NULL) | |
1231 | { | |
1232 | last_received = header_list; | |
1233 | while (!header_testname(last_received, US"Received", 8, FALSE)) | |
1234 | last_received = last_received->next; | |
1235 | while (last_received->next != NULL && | |
1236 | header_testname(last_received->next, US"Received", 8, FALSE)) | |
1237 | last_received = last_received->next; | |
1238 | } | |
1239 | h->next = last_received->next; | |
1240 | last_received->next = h; | |
e1d04f48 | 1241 | DEBUG(D_receive|D_acl) debug_printf_indent(" (after Received:)"); |
059ec3d9 PH |
1242 | break; |
1243 | ||
8523533c TK |
1244 | case htype_add_rfc: |
1245 | /* add header before any header which is NOT Received: or Resent- */ | |
1246 | last_received = header_list; | |
1247 | while ( (last_received->next != NULL) && | |
1248 | ( (header_testname(last_received->next, US"Received", 8, FALSE)) || | |
1249 | (header_testname_incomplete(last_received->next, US"Resent-", 7, FALSE)) ) ) | |
1250 | last_received = last_received->next; | |
1251 | /* last_received now points to the last Received: or Resent-* header | |
1252 | in an uninterrupted chain of those header types (seen from the beginning | |
1253 | of all headers. Our current header must follow it. */ | |
1254 | h->next = last_received->next; | |
1255 | last_received->next = h; | |
e1d04f48 | 1256 | DEBUG(D_receive|D_acl) debug_printf_indent(" (before any non-Received: or Resent-*: header)"); |
8523533c TK |
1257 | break; |
1258 | ||
059ec3d9 PH |
1259 | default: |
1260 | h->next = NULL; | |
1261 | header_last->next = h; | |
1262 | break; | |
1263 | } | |
1264 | ||
1265 | if (h->next == NULL) header_last = h; | |
1266 | ||
1267 | /* Check for one of the known header types (From:, To:, etc.) though in | |
1268 | practice most added headers are going to be "other". Lower case | |
1269 | identification letters are never stored with the header; they are used | |
1270 | for existence tests when messages are received. So discard any lower case | |
1271 | flag values. */ | |
1272 | ||
1273 | h->type = header_checkname(h, FALSE); | |
1274 | if (h->type >= 'a') h->type = htype_other; | |
1275 | ||
e1d04f48 | 1276 | DEBUG(D_receive|D_acl) debug_printf_indent(" %s", header_last->text); |
059ec3d9 PH |
1277 | } |
1278 | ||
71fafd95 | 1279 | acl_added_headers = NULL; |
e1d04f48 | 1280 | DEBUG(D_receive|D_acl) debug_printf_indent(">>\n"); |
059ec3d9 PH |
1281 | } |
1282 | ||
1283 | ||
1284 | ||
1285 | /************************************************* | |
1286 | * Add host information for log line * | |
1287 | *************************************************/ | |
1288 | ||
1289 | /* Called for acceptance and rejecting log lines. This adds information about | |
1290 | the calling host to a string that is being built dynamically. | |
1291 | ||
1292 | Arguments: | |
1293 | s the dynamic string | |
1294 | sizeptr points to the size variable | |
1295 | ptrptr points to the pointer variable | |
1296 | ||
1297 | Returns: the extended string | |
1298 | */ | |
1299 | ||
1300 | static uschar * | |
fc16abb4 | 1301 | add_host_info_for_log(uschar * s, int * sizeptr, int * ptrptr) |
059ec3d9 | 1302 | { |
fc16abb4 | 1303 | if (sender_fullhost) |
059ec3d9 | 1304 | { |
fc16abb4 JH |
1305 | if (LOGGING(dnssec) && sender_host_dnssec) /*XXX sender_helo_dnssec? */ |
1306 | s = string_cat(s, sizeptr, ptrptr, US" DS"); | |
059ec3d9 | 1307 | s = string_append(s, sizeptr, ptrptr, 2, US" H=", sender_fullhost); |
6c6d6e48 | 1308 | if (LOGGING(incoming_interface) && interface_address != NULL) |
059ec3d9 | 1309 | { |
fc16abb4 JH |
1310 | s = string_cat(s, sizeptr, ptrptr, |
1311 | string_sprintf(" I=[%s]:%d", interface_address, interface_port)); | |
059ec3d9 PH |
1312 | } |
1313 | } | |
1314 | if (sender_ident != NULL) | |
1315 | s = string_append(s, sizeptr, ptrptr, 2, US" U=", sender_ident); | |
1316 | if (received_protocol != NULL) | |
1317 | s = string_append(s, sizeptr, ptrptr, 2, US" P=", received_protocol); | |
1318 | return s; | |
1319 | } | |
1320 | ||
1321 | ||
1322 | ||
63955bf2 | 1323 | #ifdef WITH_CONTENT_SCAN |
059ec3d9 | 1324 | |
54cdb463 PH |
1325 | /************************************************* |
1326 | * Run the MIME ACL on a message * | |
1327 | *************************************************/ | |
1328 | ||
1329 | /* This code is in a subroutine so that it can be used for both SMTP | |
1330 | and non-SMTP messages. It is called with a non-NULL ACL pointer. | |
1331 | ||
1332 | Arguments: | |
1333 | acl The ACL to run (acl_smtp_mime or acl_not_smtp_mime) | |
1334 | smtp_yield_ptr Set FALSE to kill messages after dropped connection | |
1335 | smtp_reply_ptr Where SMTP reply is being built | |
1336 | blackholed_by_ptr Where "blackholed by" message is being built | |
1337 | ||
1338 | Returns: TRUE to carry on; FALSE to abandon the message | |
1339 | */ | |
1340 | ||
1341 | static BOOL | |
1342 | run_mime_acl(uschar *acl, BOOL *smtp_yield_ptr, uschar **smtp_reply_ptr, | |
1343 | uschar **blackholed_by_ptr) | |
1344 | { | |
1345 | FILE *mbox_file; | |
1346 | uschar rfc822_file_path[2048]; | |
1347 | unsigned long mbox_size; | |
1348 | header_line *my_headerlist; | |
1349 | uschar *user_msg, *log_msg; | |
1350 | int mime_part_count_buffer = -1; | |
040721f2 | 1351 | uschar * mbox_filename; |
7156b1ef | 1352 | int rc = OK; |
54cdb463 PH |
1353 | |
1354 | memset(CS rfc822_file_path,0,2048); | |
1355 | ||
1356 | /* check if it is a MIME message */ | |
040721f2 JH |
1357 | |
1358 | for (my_headerlist = header_list; my_headerlist; my_headerlist = my_headerlist->next) | |
1359 | if ( my_headerlist->type != '*' /* skip deleted headers */ | |
1360 | && strncmpic(my_headerlist->text, US"Content-Type:", 13) == 0 | |
1361 | ) | |
4e88a19f | 1362 | { |
54cdb463 PH |
1363 | DEBUG(D_receive) debug_printf("Found Content-Type: header - executing acl_smtp_mime.\n"); |
1364 | goto DO_MIME_ACL; | |
4e88a19f | 1365 | } |
54cdb463 PH |
1366 | |
1367 | DEBUG(D_receive) debug_printf("No Content-Type: header - presumably not a MIME message.\n"); | |
1368 | return TRUE; | |
1369 | ||
1370 | DO_MIME_ACL: | |
040721f2 | 1371 | |
54cdb463 | 1372 | /* make sure the eml mbox file is spooled up */ |
040721f2 JH |
1373 | if (!(mbox_file = spool_mbox(&mbox_size, NULL, &mbox_filename))) |
1374 | { /* error while spooling */ | |
54cdb463 PH |
1375 | log_write(0, LOG_MAIN|LOG_PANIC, |
1376 | "acl_smtp_mime: error while creating mbox spool file, message temporarily rejected."); | |
1377 | Uunlink(spool_name); | |
1378 | unspool_mbox(); | |
6f0c431a PP |
1379 | #ifdef EXPERIMENTAL_DCC |
1380 | dcc_ok = 0; | |
1381 | #endif | |
a5bd321b | 1382 | smtp_respond(US"451", 3, TRUE, US"temporary local problem"); |
54cdb463 PH |
1383 | message_id[0] = 0; /* Indicate no message accepted */ |
1384 | *smtp_reply_ptr = US""; /* Indicate reply already sent */ | |
1385 | return FALSE; /* Indicate skip to end of receive function */ | |
040721f2 | 1386 | } |
54cdb463 PH |
1387 | |
1388 | mime_is_rfc822 = 0; | |
1389 | ||
1390 | MIME_ACL_CHECK: | |
1391 | mime_part_count = -1; | |
1392 | rc = mime_acl_check(acl, mbox_file, NULL, &user_msg, &log_msg); | |
f1e894f3 | 1393 | (void)fclose(mbox_file); |
54cdb463 | 1394 | |
4e88a19f PH |
1395 | if (Ustrlen(rfc822_file_path) > 0) |
1396 | { | |
54cdb463 PH |
1397 | mime_part_count = mime_part_count_buffer; |
1398 | ||
4e88a19f PH |
1399 | if (unlink(CS rfc822_file_path) == -1) |
1400 | { | |
54cdb463 PH |
1401 | log_write(0, LOG_PANIC, |
1402 | "acl_smtp_mime: can't unlink RFC822 spool file, skipping."); | |
1403 | goto END_MIME_ACL; | |
4e88a19f PH |
1404 | } |
1405 | } | |
54cdb463 PH |
1406 | |
1407 | /* check if we must check any message/rfc822 attachments */ | |
4e88a19f PH |
1408 | if (rc == OK) |
1409 | { | |
040721f2 | 1410 | uschar * scandir; |
e8bc7fca JH |
1411 | struct dirent * entry; |
1412 | DIR * tempdir; | |
54cdb463 | 1413 | |
040721f2 | 1414 | scandir = string_copyn(mbox_filename, Ustrrchr(mbox_filename, '/') - mbox_filename); |
54cdb463 | 1415 | |
040721f2 | 1416 | tempdir = opendir(CS scandir); |
e8bc7fca | 1417 | for (;;) |
4e88a19f | 1418 | { |
e8bc7fca JH |
1419 | if (!(entry = readdir(tempdir))) |
1420 | break; | |
1421 | if (strncmpic(US entry->d_name, US"__rfc822_", 9) == 0) | |
4e88a19f | 1422 | { |
e8bc7fca | 1423 | (void) string_format(rfc822_file_path, sizeof(rfc822_file_path), |
040721f2 | 1424 | "%s/%s", scandir, entry->d_name); |
e1d04f48 | 1425 | DEBUG(D_receive) debug_printf("RFC822 attachment detected: running MIME ACL for '%s'\n", |
e8bc7fca | 1426 | rfc822_file_path); |
4e88a19f PH |
1427 | break; |
1428 | } | |
e8bc7fca | 1429 | } |
4e88a19f | 1430 | closedir(tempdir); |
54cdb463 | 1431 | |
e8bc7fca | 1432 | if (entry) |
4e88a19f | 1433 | { |
e8bc7fca | 1434 | if ((mbox_file = Ufopen(rfc822_file_path, "rb"))) |
4e88a19f | 1435 | { |
e8bc7fca JH |
1436 | /* set RFC822 expansion variable */ |
1437 | mime_is_rfc822 = 1; | |
1438 | mime_part_count_buffer = mime_part_count; | |
1439 | goto MIME_ACL_CHECK; | |
4e88a19f | 1440 | } |
e8bc7fca JH |
1441 | log_write(0, LOG_PANIC, |
1442 | "acl_smtp_mime: can't open RFC822 spool file, skipping."); | |
1443 | unlink(CS rfc822_file_path); | |
4e88a19f PH |
1444 | } |
1445 | } | |
54cdb463 PH |
1446 | |
1447 | END_MIME_ACL: | |
578d43dc | 1448 | add_acl_headers(ACL_WHERE_MIME, US"MIME"); |
54cdb463 PH |
1449 | if (rc == DISCARD) |
1450 | { | |
1451 | recipients_count = 0; | |
1452 | *blackholed_by_ptr = US"MIME ACL"; | |
1453 | } | |
1454 | else if (rc != OK) | |
1455 | { | |
1456 | Uunlink(spool_name); | |
1457 | unspool_mbox(); | |
6f0c431a PP |
1458 | #ifdef EXPERIMENTAL_DCC |
1459 | dcc_ok = 0; | |
1460 | #endif | |
4f6ae5c3 JH |
1461 | if ( smtp_input |
1462 | && smtp_handle_acl_fail(ACL_WHERE_MIME, rc, user_msg, log_msg) != 0) | |
1463 | { | |
85ffcba6 | 1464 | *smtp_yield_ptr = FALSE; /* No more messages after dropped connection */ |
f4c1088b | 1465 | *smtp_reply_ptr = US""; /* Indicate reply already sent */ |
4f6ae5c3 | 1466 | } |
54cdb463 PH |
1467 | message_id[0] = 0; /* Indicate no message accepted */ |
1468 | return FALSE; /* Cause skip to end of receive function */ | |
4e88a19f | 1469 | } |
54cdb463 PH |
1470 | |
1471 | return TRUE; | |
1472 | } | |
1473 | ||
63955bf2 | 1474 | #endif /* WITH_CONTENT_SCAN */ |
54cdb463 PH |
1475 | |
1476 | ||
e4bdf652 JH |
1477 | |
1478 | void | |
1479 | received_header_gen(void) | |
1480 | { | |
1481 | uschar *received; | |
1482 | uschar *timestamp; | |
1483 | header_line *received_header= header_list; | |
1484 | ||
1485 | timestamp = expand_string(US"${tod_full}"); | |
1486 | if (recipients_count == 1) received_for = recipients_list[0].address; | |
1487 | received = expand_string(received_header_text); | |
1488 | received_for = NULL; | |
1489 | ||
d4ff61d1 | 1490 | if (!received) |
e4bdf652 JH |
1491 | { |
1492 | if(spool_name[0] != 0) | |
1493 | Uunlink(spool_name); /* Lose the data file */ | |
1494 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Expansion of \"%s\" " | |
1495 | "(received_header_text) failed: %s", string_printing(received_header_text), | |
1496 | expand_string_message); | |
1497 | } | |
1498 | ||
1499 | /* The first element on the header chain is reserved for the Received header, | |
1500 | so all we have to do is fill in the text pointer, and set the type. However, if | |
1501 | the result of the expansion is an empty string, we leave the header marked as | |
1502 | "old" so as to refrain from adding a Received header. */ | |
1503 | ||
1504 | if (received[0] == 0) | |
1505 | { | |
1506 | received_header->text = string_sprintf("Received: ; %s\n", timestamp); | |
1507 | received_header->type = htype_old; | |
1508 | } | |
1509 | else | |
1510 | { | |
1511 | received_header->text = string_sprintf("%s; %s\n", received, timestamp); | |
1512 | received_header->type = htype_received; | |
1513 | } | |
1514 | ||
1515 | received_header->slen = Ustrlen(received_header->text); | |
1516 | ||
1517 | DEBUG(D_receive) debug_printf(">>Generated Received: header line\n%c %s", | |
1518 | received_header->type, received_header->text); | |
1519 | } | |
1520 | ||
1521 | ||
1522 | ||
059ec3d9 PH |
1523 | /************************************************* |
1524 | * Receive message * | |
1525 | *************************************************/ | |
1526 | ||
1527 | /* Receive a message on the given input, and put it into a pair of spool files. | |
1528 | Either a non-null list of recipients, or the extract flag will be true, or | |
1529 | both. The flag sender_local is true for locally generated messages. The flag | |
1530 | submission_mode is true if an ACL has obeyed "control = submission". The flag | |
8800895a | 1531 | suppress_local_fixups is true if an ACL has obeyed "control = |
f4ee74ac PP |
1532 | suppress_local_fixups" or -G was passed on the command-line. |
1533 | The flag smtp_input is true if the message is to be | |
8800895a PH |
1534 | handled using SMTP conventions about termination and lines starting with dots. |
1535 | For non-SMTP messages, dot_ends is true for dot-terminated messages. | |
059ec3d9 PH |
1536 | |
1537 | If a message was successfully read, message_id[0] will be non-zero. | |
1538 | ||
1539 | The general actions of this function are: | |
1540 | ||
1541 | . Read the headers of the message (if any) into a chain of store | |
1542 | blocks. | |
1543 | ||
1544 | . If there is a "sender:" header and the message is locally originated, | |
69358f02 PH |
1545 | throw it away, unless the caller is trusted, or unless |
1546 | active_local_sender_retain is set - which can only happen if | |
1547 | active_local_from_check is false. | |
059ec3d9 PH |
1548 | |
1549 | . If recipients are to be extracted from the message, build the | |
1550 | recipients list from the headers, removing any that were on the | |
1551 | original recipients list (unless extract_addresses_remove_arguments is | |
1552 | false), and at the same time, remove any bcc header that may be present. | |
1553 | ||
1554 | . Get the spool file for the data, sort out its unique name, open | |
1555 | and lock it (but don't give it the name yet). | |
1556 | ||
1557 | . Generate a "Message-Id" header if the message doesn't have one, for | |
1558 | locally-originated messages. | |
1559 | ||
1560 | . Generate a "Received" header. | |
1561 | ||
1562 | . Ensure the recipients list is fully qualified and rewritten if necessary. | |
1563 | ||
1564 | . If there are any rewriting rules, apply them to the sender address | |
1565 | and also to the headers. | |
1566 | ||
1567 | . If there is no from: header, generate one, for locally-generated messages | |
1568 | and messages in "submission mode" only. | |
1569 | ||
1570 | . If the sender is local, check that from: is correct, and if not, generate | |
1571 | a Sender: header, unless message comes from a trusted caller, or this | |
69358f02 | 1572 | feature is disabled by active_local_from_check being false. |
059ec3d9 PH |
1573 | |
1574 | . If there is no "date" header, generate one, for locally-originated | |
1575 | or submission mode messages only. | |
1576 | ||
1577 | . Copy the rest of the input, or up to a terminating "." if in SMTP or | |
1578 | dot_ends mode, to the data file. Leave it open, to hold the lock. | |
1579 | ||
1580 | . Write the envelope and the headers to a new file. | |
1581 | ||
1582 | . Set the name for the header file; close it. | |
1583 | ||
1584 | . Set the name for the data file; close it. | |
1585 | ||
1586 | Because this function can potentially be called many times in a single | |
1587 | SMTP connection, all store should be got by store_get(), so that it will be | |
1588 | automatically retrieved after the message is accepted. | |
1589 | ||
1590 | FUDGE: It seems that sites on the net send out messages with just LF | |
1591 | terminators, despite the warnings in the RFCs, and other MTAs handle this. So | |
1592 | we make the CRs optional in all cases. | |
1593 | ||
1594 | July 2003: Bare CRs in messages, especially in header lines, cause trouble. A | |
1595 | new regime is now in place in which bare CRs in header lines are turned into LF | |
1596 | followed by a space, so as not to terminate the header line. | |
1597 | ||
1598 | February 2004: A bare LF in a header line in a message whose first line was | |
1599 | terminated by CRLF is treated in the same way as a bare CR. | |
1600 | ||
1601 | Arguments: | |
1602 | extract_recip TRUE if recipients are to be extracted from the message's | |
1603 | headers | |
1604 | ||
1605 | Returns: TRUE there are more messages to be read (SMTP input) | |
1606 | FALSE there are no more messages to be read (non-SMTP input | |
1607 | or SMTP connection collapsed, or other failure) | |
1608 | ||
1609 | When reading a message for filter testing, the returned value indicates | |
1610 | whether the headers (which is all that is read) were terminated by '.' or | |
1611 | not. */ | |
1612 | ||
1613 | BOOL | |
1614 | receive_msg(BOOL extract_recip) | |
1615 | { | |
7156b1ef NM |
1616 | int i; |
1617 | int rc = FAIL; | |
059ec3d9 PH |
1618 | int msg_size = 0; |
1619 | int process_info_len = Ustrlen(process_info); | |
1620 | int error_rc = (error_handling == ERRORS_SENDER)? | |
1621 | errors_sender_rc : EXIT_FAILURE; | |
1622 | int header_size = 256; | |
1623 | int start, end, domain, size, sptr; | |
1624 | int id_resolution; | |
1625 | int had_zero = 0; | |
d677b2f2 | 1626 | int prevlines_length = 0; |
059ec3d9 PH |
1627 | |
1628 | register int ptr = 0; | |
1629 | ||
1630 | BOOL contains_resent_headers = FALSE; | |
1631 | BOOL extracted_ignored = FALSE; | |
1632 | BOOL first_line_ended_crlf = TRUE_UNSET; | |
1633 | BOOL smtp_yield = TRUE; | |
1634 | BOOL yield = FALSE; | |
1635 | ||
1636 | BOOL resents_exist = FALSE; | |
1637 | uschar *resent_prefix = US""; | |
1638 | uschar *blackholed_by = NULL; | |
04f7d5b9 | 1639 | uschar *blackhole_log_msg = US""; |
c5430c20 | 1640 | enum {NOT_TRIED, TMP_REJ, PERM_REJ, ACCEPTED} cutthrough_done = NOT_TRIED; |
059ec3d9 PH |
1641 | |
1642 | flock_t lock_data; | |
1643 | error_block *bad_addresses = NULL; | |
1644 | ||
1645 | uschar *frozen_by = NULL; | |
1646 | uschar *queued_by = NULL; | |
1647 | ||
1648 | uschar *errmsg, *s; | |
1649 | struct stat statbuf; | |
1650 | ||
4e88a19f | 1651 | /* Final message to give to SMTP caller, and messages from ACLs */ |
059ec3d9 PH |
1652 | |
1653 | uschar *smtp_reply = NULL; | |
4e88a19f | 1654 | uschar *user_msg, *log_msg; |
059ec3d9 PH |
1655 | |
1656 | /* Working header pointers */ | |
1657 | ||
1658 | header_line *h, *next; | |
1659 | ||
2cbb4081 | 1660 | /* Flags for noting the existence of certain headers (only one left) */ |
059ec3d9 PH |
1661 | |
1662 | BOOL date_header_exists = FALSE; | |
1663 | ||
1664 | /* Pointers to receive the addresses of headers whose contents we need. */ | |
1665 | ||
1666 | header_line *from_header = NULL; | |
1667 | header_line *subject_header = NULL; | |
1668 | header_line *msgid_header = NULL; | |
1669 | header_line *received_header; | |
1670 | ||
4840604e TL |
1671 | #ifdef EXPERIMENTAL_DMARC |
1672 | int dmarc_up = 0; | |
1673 | #endif /* EXPERIMENTAL_DMARC */ | |
1674 | ||
059ec3d9 PH |
1675 | /* Variables for use when building the Received: header. */ |
1676 | ||
059ec3d9 PH |
1677 | uschar *timestamp; |
1678 | int tslen; | |
1679 | ||
1680 | /* Release any open files that might have been cached while preparing to | |
1681 | accept the message - e.g. by verifying addresses - because reading a message | |
1682 | might take a fair bit of real time. */ | |
1683 | ||
1684 | search_tidyup(); | |
1685 | ||
e4bdf652 JH |
1686 | /* Extracting the recipient list from an input file is incompatible with |
1687 | cutthrough delivery with the no-spool option. It shouldn't be possible | |
817d9f57 | 1688 | to set up the combination, but just in case kill any ongoing connection. */ |
e4bdf652 | 1689 | if (extract_recip || !smtp_input) |
57cc2785 | 1690 | cancel_cutthrough_connection(TRUE, US"not smtp input"); |
e4bdf652 | 1691 | |
059ec3d9 PH |
1692 | /* Initialize the chain of headers by setting up a place-holder for Received: |
1693 | header. Temporarily mark it as "old", i.e. not to be used. We keep header_last | |
1694 | pointing to the end of the chain to make adding headers simple. */ | |
1695 | ||
1696 | received_header = header_list = header_last = store_get(sizeof(header_line)); | |
1697 | header_list->next = NULL; | |
1698 | header_list->type = htype_old; | |
1699 | header_list->text = NULL; | |
1700 | header_list->slen = 0; | |
1701 | ||
1702 | /* Control block for the next header to be read. */ | |
1703 | ||
1704 | next = store_get(sizeof(header_line)); | |
1705 | next->text = store_get(header_size); | |
1706 | ||
1707 | /* Initialize message id to be null (indicating no message read), and the | |
1708 | header names list to be the normal list. Indicate there is no data file open | |
1709 | yet, initialize the size and warning count, and deal with no size limit. */ | |
1710 | ||
1711 | message_id[0] = 0; | |
1712 | data_file = NULL; | |
1713 | data_fd = -1; | |
41313d92 | 1714 | spool_name = US""; |
059ec3d9 PH |
1715 | message_size = 0; |
1716 | warning_count = 0; | |
d677b2f2 | 1717 | received_count = 1; /* For the one we will add */ |
059ec3d9 PH |
1718 | |
1719 | if (thismessage_size_limit <= 0) thismessage_size_limit = INT_MAX; | |
1720 | ||
2e0c1448 | 1721 | /* While reading the message, the following counts are computed. */ |
059ec3d9 | 1722 | |
d677b2f2 PH |
1723 | message_linecount = body_linecount = body_zerocount = |
1724 | max_received_linelength = 0; | |
059ec3d9 | 1725 | |
80a47a2c | 1726 | #ifndef DISABLE_DKIM |
e983e85a JH |
1727 | /* Call into DKIM to set up the context. In CHUNKING mode |
1728 | we clear the dot-stuffing flag */ | |
1729 | if (smtp_input && !smtp_batched_input && !dkim_disable_verify) | |
1730 | dkim_exim_verify_init(chunking_state <= CHUNKING_OFFERED); | |
fb2274d4 TK |
1731 | #endif |
1732 | ||
4840604e TL |
1733 | #ifdef EXPERIMENTAL_DMARC |
1734 | /* initialize libopendmarc */ | |
1735 | dmarc_up = dmarc_init(); | |
1736 | #endif | |
1737 | ||
059ec3d9 PH |
1738 | /* Remember the time of reception. Exim uses time+pid for uniqueness of message |
1739 | ids, and fractions of a second are required. See the comments that precede the | |
1740 | message id creation below. */ | |
1741 | ||
1742 | (void)gettimeofday(&message_id_tv, NULL); | |
1743 | ||
1744 | /* For other uses of the received time we can operate with granularity of one | |
1745 | second, and for that we use the global variable received_time. This is for | |
1746 | things like ultimate message timeouts. */ | |
1747 | ||
1748 | received_time = message_id_tv.tv_sec; | |
1749 | ||
1750 | /* If SMTP input, set the special handler for timeouts. The alarm() calls | |
1751 | happen in the smtp_getc() function when it refills its buffer. */ | |
1752 | ||
1753 | if (smtp_input) os_non_restarting_signal(SIGALRM, data_timeout_handler); | |
1754 | ||
1755 | /* If not SMTP input, timeout happens only if configured, and we just set a | |
1756 | single timeout for the whole message. */ | |
1757 | ||
1758 | else if (receive_timeout > 0) | |
1759 | { | |
1760 | os_non_restarting_signal(SIGALRM, data_timeout_handler); | |
1761 | alarm(receive_timeout); | |
1762 | } | |
1763 | ||
1764 | /* SIGTERM and SIGINT are caught always. */ | |
1765 | ||
1766 | signal(SIGTERM, data_sigterm_sigint_handler); | |
1767 | signal(SIGINT, data_sigterm_sigint_handler); | |
1768 | ||
1769 | /* Header lines in messages are not supposed to be very long, though when | |
1770 | unfolded, to: and cc: headers can take up a lot of store. We must also cope | |
1771 | with the possibility of junk being thrown at us. Start by getting 256 bytes for | |
1772 | storing the header, and extend this as necessary using string_cat(). | |
1773 | ||
1774 | To cope with total lunacies, impose an upper limit on the length of the header | |
1775 | section of the message, as otherwise the store will fill up. We must also cope | |
1776 | with the possibility of binary zeros in the data. Hence we cannot use fgets(). | |
1777 | Folded header lines are joined into one string, leaving the '\n' characters | |
1778 | inside them, so that writing them out reproduces the input. | |
1779 | ||
1780 | Loop for each character of each header; the next structure for chaining the | |
1781 | header is set up already, with ptr the offset of the next character in | |
1782 | next->text. */ | |
1783 | ||
1784 | for (;;) | |
1785 | { | |
bd8fbe36 | 1786 | int ch = (receive_getc)(GETC_BUFFER_UNLIMITED); |
059ec3d9 PH |
1787 | |
1788 | /* If we hit EOF on a SMTP connection, it's an error, since incoming | |
1789 | SMTP must have a correct "." terminator. */ | |
1790 | ||
1791 | if (ch == EOF && smtp_input /* && !smtp_batched_input */) | |
1792 | { | |
1793 | smtp_reply = handle_lost_connection(US" (header)"); | |
1794 | smtp_yield = FALSE; | |
1795 | goto TIDYUP; /* Skip to end of function */ | |
1796 | } | |
1797 | ||
1798 | /* See if we are at the current header's size limit - there must be at least | |
1799 | four bytes left. This allows for the new character plus a zero, plus two for | |
1800 | extra insertions when we are playing games with dots and carriage returns. If | |
1801 | we are at the limit, extend the text buffer. This could have been done | |
1802 | automatically using string_cat() but because this is a tightish loop storing | |
1803 | only one character at a time, we choose to do it inline. Normally | |
1804 | store_extend() will be able to extend the block; only at the end of a big | |
1805 | store block will a copy be needed. To handle the case of very long headers | |
1806 | (and sometimes lunatic messages can have ones that are 100s of K long) we | |
1807 | call store_release() for strings that have been copied - if the string is at | |
1808 | the start of a block (and therefore the only thing in it, because we aren't | |
1809 | doing any other gets), the block gets freed. We can only do this because we | |
1810 | know there are no other calls to store_get() going on. */ | |
1811 | ||
1812 | if (ptr >= header_size - 4) | |
1813 | { | |
1814 | int oldsize = header_size; | |
1815 | /* header_size += 256; */ | |
1816 | header_size *= 2; | |
1817 | if (!store_extend(next->text, oldsize, header_size)) | |
1818 | { | |
1819 | uschar *newtext = store_get(header_size); | |
1820 | memcpy(newtext, next->text, ptr); | |
1821 | store_release(next->text); | |
1822 | next->text = newtext; | |
1823 | } | |
1824 | } | |
1825 | ||
1826 | /* Cope with receiving a binary zero. There is dispute about whether | |
1827 | these should be allowed in RFC 822 messages. The middle view is that they | |
1828 | should not be allowed in headers, at least. Exim takes this attitude at | |
1829 | the moment. We can't just stomp on them here, because we don't know that | |
1830 | this line is a header yet. Set a flag to cause scanning later. */ | |
1831 | ||
1832 | if (ch == 0) had_zero++; | |
1833 | ||
1834 | /* Test for termination. Lines in remote SMTP are terminated by CRLF, while | |
1835 | those from data files use just LF. Treat LF in local SMTP input as a | |
1836 | terminator too. Treat EOF as a line terminator always. */ | |
1837 | ||
1838 | if (ch == EOF) goto EOL; | |
1839 | ||
1840 | /* FUDGE: There are sites out there that don't send CRs before their LFs, and | |
1841 | other MTAs accept this. We are therefore forced into this "liberalisation" | |
1842 | too, so we accept LF as a line terminator whatever the source of the message. | |
1843 | However, if the first line of the message ended with a CRLF, we treat a bare | |
1844 | LF specially by inserting a white space after it to ensure that the header | |
1845 | line is not terminated. */ | |
1846 | ||
1847 | if (ch == '\n') | |
1848 | { | |
1849 | if (first_line_ended_crlf == TRUE_UNSET) first_line_ended_crlf = FALSE; | |
80a47a2c | 1850 | else if (first_line_ended_crlf) receive_ungetc(' '); |
059ec3d9 PH |
1851 | goto EOL; |
1852 | } | |
1853 | ||
1854 | /* This is not the end of the line. If this is SMTP input and this is | |
1855 | the first character in the line and it is a "." character, ignore it. | |
1856 | This implements the dot-doubling rule, though header lines starting with | |
1857 | dots aren't exactly common. They are legal in RFC 822, though. If the | |
1858 | following is CRLF or LF, this is the line that that terminates the | |
1859 | entire message. We set message_ended to indicate this has happened (to | |
1860 | prevent further reading), and break out of the loop, having freed the | |
1861 | empty header, and set next = NULL to indicate no data line. */ | |
1862 | ||
1863 | if (ptr == 0 && ch == '.' && (smtp_input || dot_ends)) | |
1864 | { | |
bd8fbe36 | 1865 | ch = (receive_getc)(GETC_BUFFER_UNLIMITED); |
059ec3d9 PH |
1866 | if (ch == '\r') |
1867 | { | |
bd8fbe36 | 1868 | ch = (receive_getc)(GETC_BUFFER_UNLIMITED); |
059ec3d9 PH |
1869 | if (ch != '\n') |
1870 | { | |
80a47a2c | 1871 | receive_ungetc(ch); |
059ec3d9 PH |
1872 | ch = '\r'; /* Revert to CR */ |
1873 | } | |
1874 | } | |
1875 | if (ch == '\n') | |
1876 | { | |
1877 | message_ended = END_DOT; | |
1878 | store_reset(next); | |
1879 | next = NULL; | |
1880 | break; /* End character-reading loop */ | |
1881 | } | |
1882 | ||
1883 | /* For non-SMTP input, the dot at the start of the line was really a data | |
1884 | character. What is now in ch is the following character. We guaranteed | |
1885 | enough space for this above. */ | |
1886 | ||
1887 | if (!smtp_input) | |
1888 | { | |
1889 | next->text[ptr++] = '.'; | |
1890 | message_size++; | |
1891 | } | |
1892 | } | |
1893 | ||
1894 | /* If CR is immediately followed by LF, end the line, ignoring the CR, and | |
1895 | remember this case if this is the first line ending. */ | |
1896 | ||
1897 | if (ch == '\r') | |
1898 | { | |
bd8fbe36 | 1899 | ch = (receive_getc)(GETC_BUFFER_UNLIMITED); |
059ec3d9 PH |
1900 | if (ch == '\n') |
1901 | { | |
1902 | if (first_line_ended_crlf == TRUE_UNSET) first_line_ended_crlf = TRUE; | |
1903 | goto EOL; | |
1904 | } | |
1905 | ||
1906 | /* Otherwise, put back the character after CR, and turn the bare CR | |
1907 | into LF SP. */ | |
1908 | ||
80a47a2c | 1909 | ch = (receive_ungetc)(ch); |
059ec3d9 PH |
1910 | next->text[ptr++] = '\n'; |
1911 | message_size++; | |
1912 | ch = ' '; | |
1913 | } | |
1914 | ||
1915 | /* We have a data character for the header line. */ | |
1916 | ||
1917 | next->text[ptr++] = ch; /* Add to buffer */ | |
1918 | message_size++; /* Total message size so far */ | |
1919 | ||
1920 | /* Handle failure due to a humungously long header section. The >= allows | |
1921 | for the terminating \n. Add what we have so far onto the headers list so | |
1922 | that it gets reflected in any error message, and back up the just-read | |
1923 | character. */ | |
1924 | ||
1925 | if (message_size >= header_maxsize) | |
1926 | { | |
1927 | next->text[ptr] = 0; | |
1928 | next->slen = ptr; | |
1929 | next->type = htype_other; | |
1930 | next->next = NULL; | |
1931 | header_last->next = next; | |
1932 | header_last = next; | |
1933 | ||
1934 | log_write(0, LOG_MAIN, "ridiculously long message header received from " | |
1935 | "%s (more than %d characters): message abandoned", | |
1936 | sender_host_unknown? sender_ident : sender_fullhost, header_maxsize); | |
1937 | ||
1938 | if (smtp_input) | |
1939 | { | |
1940 | smtp_reply = US"552 Message header is ridiculously long"; | |
1941 | receive_swallow_smtp(); | |
1942 | goto TIDYUP; /* Skip to end of function */ | |
1943 | } | |
1944 | ||
1945 | else | |
1946 | { | |
1947 | give_local_error(ERRMESS_VLONGHEADER, | |
1948 | string_sprintf("message header longer than %d characters received: " | |
1949 | "message not accepted", header_maxsize), US"", error_rc, stdin, | |
1950 | header_list->next); | |
1951 | /* Does not return */ | |
1952 | } | |
1953 | } | |
1954 | ||
1955 | continue; /* With next input character */ | |
1956 | ||
1957 | /* End of header line reached */ | |
1958 | ||
1959 | EOL: | |
2e0c1448 PH |
1960 | |
1961 | /* Keep track of lines for BSMTP errors and overall message_linecount. */ | |
1962 | ||
1963 | receive_linecount++; | |
1964 | message_linecount++; | |
059ec3d9 | 1965 | |
d677b2f2 PH |
1966 | /* Keep track of maximum line length */ |
1967 | ||
1968 | if (ptr - prevlines_length > max_received_linelength) | |
1969 | max_received_linelength = ptr - prevlines_length; | |
1970 | prevlines_length = ptr + 1; | |
1971 | ||
059ec3d9 PH |
1972 | /* Now put in the terminating newline. There is always space for |
1973 | at least two more characters. */ | |
1974 | ||
1975 | next->text[ptr++] = '\n'; | |
1976 | message_size++; | |
1977 | ||
1978 | /* A blank line signals the end of the headers; release the unwanted | |
1979 | space and set next to NULL to indicate this. */ | |
1980 | ||
1981 | if (ptr == 1) | |
1982 | { | |
1983 | store_reset(next); | |
1984 | next = NULL; | |
1985 | break; | |
1986 | } | |
1987 | ||
1988 | /* There is data in the line; see if the next input character is a | |
1989 | whitespace character. If it is, we have a continuation of this header line. | |
1990 | There is always space for at least one character at this point. */ | |
1991 | ||
1992 | if (ch != EOF) | |
1993 | { | |
bd8fbe36 | 1994 | int nextch = (receive_getc)(GETC_BUFFER_UNLIMITED); |
059ec3d9 PH |
1995 | if (nextch == ' ' || nextch == '\t') |
1996 | { | |
1997 | next->text[ptr++] = nextch; | |
1998 | message_size++; | |
1999 | continue; /* Iterate the loop */ | |
2000 | } | |
80a47a2c | 2001 | else if (nextch != EOF) (receive_ungetc)(nextch); /* For next time */ |
059ec3d9 PH |
2002 | else ch = EOF; /* Cause main loop to exit at end */ |
2003 | } | |
2004 | ||
2005 | /* We have got to the real line end. Terminate the string and release store | |
2006 | beyond it. If it turns out to be a real header, internal binary zeros will | |
2007 | be squashed later. */ | |
2008 | ||
2009 | next->text[ptr] = 0; | |
2010 | next->slen = ptr; | |
2011 | store_reset(next->text + ptr + 1); | |
2012 | ||
2013 | /* Check the running total size against the overall message size limit. We | |
2014 | don't expect to fail here, but if the overall limit is set less than MESSAGE_ | |
2015 | MAXSIZE and a big header is sent, we want to catch it. Just stop reading | |
2016 | headers - the code to read the body will then also hit the buffer. */ | |
2017 | ||
2018 | if (message_size > thismessage_size_limit) break; | |
2019 | ||
2020 | /* A line that is not syntactically correct for a header also marks | |
2021 | the end of the headers. In this case, we leave next containing the | |
2022 | first data line. This might actually be several lines because of the | |
2023 | continuation logic applied above, but that doesn't matter. | |
2024 | ||
2025 | It turns out that smail, and presumably sendmail, accept leading lines | |
2026 | of the form | |
2027 | ||
2028 | From ph10 Fri Jan 5 12:35 GMT 1996 | |
2029 | ||
2030 | in messages. The "mail" command on Solaris 2 sends such lines. I cannot | |
2031 | find any documentation of this, but for compatibility it had better be | |
2032 | accepted. Exim restricts it to the case of non-smtp messages, and | |
2033 | treats it as an alternative to the -f command line option. Thus it is | |
2034 | ignored except for trusted users or filter testing. Otherwise it is taken | |
2035 | as the sender address, unless -f was used (sendmail compatibility). | |
2036 | ||
2037 | It further turns out that some UUCPs generate the From_line in a different | |
2038 | format, e.g. | |
2039 | ||
2040 | From ph10 Fri, 7 Jan 97 14:00:00 GMT | |
2041 | ||
2042 | The regex for matching these things is now capable of recognizing both | |
2043 | formats (including 2- and 4-digit years in the latter). In fact, the regex | |
2044 | is now configurable, as is the expansion string to fish out the sender. | |
2045 | ||
2046 | Even further on it has been discovered that some broken clients send | |
2047 | these lines in SMTP messages. There is now an option to ignore them from | |
2048 | specified hosts or networks. Sigh. */ | |
2049 | ||
2050 | if (header_last == header_list && | |
2051 | (!smtp_input | |
2052 | || | |
2053 | (sender_host_address != NULL && | |
2054 | verify_check_host(&ignore_fromline_hosts) == OK) | |
2055 | || | |
2056 | (sender_host_address == NULL && ignore_fromline_local) | |
2057 | ) && | |
2058 | regex_match_and_setup(regex_From, next->text, 0, -1)) | |
2059 | { | |
2060 | if (!sender_address_forced) | |
2061 | { | |
2062 | uschar *uucp_sender = expand_string(uucp_from_sender); | |
2063 | if (uucp_sender == NULL) | |
2064 | { | |
2065 | log_write(0, LOG_MAIN|LOG_PANIC, | |
2066 | "expansion of \"%s\" failed after matching " | |
2067 | "\"From \" line: %s", uucp_from_sender, expand_string_message); | |
2068 | } | |
2069 | else | |
2070 | { | |
2071 | int start, end, domain; | |
2072 | uschar *errmess; | |
2073 | uschar *newsender = parse_extract_address(uucp_sender, &errmess, | |
2074 | &start, &end, &domain, TRUE); | |
2075 | if (newsender != NULL) | |
2076 | { | |
2077 | if (domain == 0 && newsender[0] != 0) | |
2078 | newsender = rewrite_address_qualify(newsender, FALSE); | |
2079 | ||
f05da2e8 | 2080 | if (filter_test != FTEST_NONE || receive_check_set_sender(newsender)) |
059ec3d9 PH |
2081 | { |
2082 | sender_address = newsender; | |
2083 | ||
f05da2e8 | 2084 | if (trusted_caller || filter_test != FTEST_NONE) |
059ec3d9 PH |
2085 | { |
2086 | authenticated_sender = NULL; | |
2087 | originator_name = US""; | |
2088 | sender_local = FALSE; | |
2089 | } | |
2090 | ||
f05da2e8 | 2091 | if (filter_test != FTEST_NONE) |
059ec3d9 PH |
2092 | printf("Sender taken from \"From \" line\n"); |
2093 | } | |
2094 | } | |
2095 | } | |
2096 | } | |
2097 | } | |
2098 | ||
2099 | /* Not a leading "From " line. Check to see if it is a valid header line. | |
2100 | Header names may contain any non-control characters except space and colon, | |
2101 | amazingly. */ | |
2102 | ||
2103 | else | |
2104 | { | |
2105 | uschar *p = next->text; | |
2106 | ||
2107 | /* If not a valid header line, break from the header reading loop, leaving | |
2108 | next != NULL, indicating that it holds the first line of the body. */ | |
2109 | ||
2110 | if (isspace(*p)) break; | |
2111 | while (mac_isgraph(*p) && *p != ':') p++; | |
2112 | while (isspace(*p)) p++; | |
2113 | if (*p != ':') | |
2114 | { | |
2115 | body_zerocount = had_zero; | |
2116 | break; | |
2117 | } | |
2118 | ||
2119 | /* We have a valid header line. If there were any binary zeroes in | |
2120 | the line, stomp on them here. */ | |
2121 | ||
2122 | if (had_zero > 0) | |
2123 | for (p = next->text; p < next->text + ptr; p++) if (*p == 0) *p = '?'; | |
2124 | ||
2125 | /* It is perfectly legal to have an empty continuation line | |
2126 | at the end of a header, but it is confusing to humans | |
2127 | looking at such messages, since it looks like a blank line. | |
2128 | Reduce confusion by removing redundant white space at the | |
2129 | end. We know that there is at least one printing character | |
2130 | (the ':' tested for above) so there is no danger of running | |
2131 | off the end. */ | |
2132 | ||
2133 | p = next->text + ptr - 2; | |
2134 | for (;;) | |
2135 | { | |
2136 | while (*p == ' ' || *p == '\t') p--; | |
2137 | if (*p != '\n') break; | |
2138 | ptr = (p--) - next->text + 1; | |
2139 | message_size -= next->slen - ptr; | |
2140 | next->text[ptr] = 0; | |
2141 | next->slen = ptr; | |
2142 | } | |
2143 | ||
2144 | /* Add the header to the chain */ | |
2145 | ||
2146 | next->type = htype_other; | |
2147 | next->next = NULL; | |
2148 | header_last->next = next; | |
2149 | header_last = next; | |
2150 | ||
2151 | /* Check the limit for individual line lengths. This comes after adding to | |
2152 | the chain so that the failing line is reflected if a bounce is generated | |
2153 | (for a local message). */ | |
2154 | ||
2155 | if (header_line_maxsize > 0 && next->slen > header_line_maxsize) | |
2156 | { | |
2157 | log_write(0, LOG_MAIN, "overlong message header line received from " | |
2158 | "%s (more than %d characters): message abandoned", | |
2159 | sender_host_unknown? sender_ident : sender_fullhost, | |
2160 | header_line_maxsize); | |
2161 | ||
2162 | if (smtp_input) | |
2163 | { | |
2164 | smtp_reply = US"552 A message header line is too long"; | |
2165 | receive_swallow_smtp(); | |
2166 | goto TIDYUP; /* Skip to end of function */ | |
2167 | } | |
2168 | ||
2169 | else | |
2170 | { | |
2171 | give_local_error(ERRMESS_VLONGHDRLINE, | |
2172 | string_sprintf("message header line longer than %d characters " | |
2173 | "received: message not accepted", header_line_maxsize), US"", | |
2174 | error_rc, stdin, header_list->next); | |
2175 | /* Does not return */ | |
2176 | } | |
2177 | } | |
2178 | ||
2179 | /* Note if any resent- fields exist. */ | |
2180 | ||
2181 | if (!resents_exist && strncmpic(next->text, US"resent-", 7) == 0) | |
2182 | { | |
2183 | resents_exist = TRUE; | |
2184 | resent_prefix = US"Resent-"; | |
2185 | } | |
2186 | } | |
2187 | ||
1ebe15c3 JH |
2188 | /* Reject CHUNKING messages that do not CRLF their first header line */ |
2189 | ||
2190 | if (!first_line_ended_crlf && chunking_state > CHUNKING_OFFERED) | |
2191 | { | |
2192 | log_write(L_size_reject, LOG_MAIN|LOG_REJECT, "rejected from <%s>%s%s%s%s: " | |
2193 | "Non-CRLF-terminated header, under CHUNKING: message abandoned", | |
2194 | sender_address, | |
2195 | sender_fullhost ? " H=" : "", sender_fullhost ? sender_fullhost : US"", | |
2196 | sender_ident ? " U=" : "", sender_ident ? sender_ident : US""); | |
925ac8e4 | 2197 | smtp_printf("552 Message header not CRLF terminated\r\n", FALSE); |
1ebe15c3 JH |
2198 | bdat_flush_data(); |
2199 | smtp_reply = US""; | |
2200 | goto TIDYUP; /* Skip to end of function */ | |
2201 | } | |
2202 | ||
059ec3d9 PH |
2203 | /* The line has been handled. If we have hit EOF, break out of the loop, |
2204 | indicating no pending data line. */ | |
2205 | ||
2206 | if (ch == EOF) { next = NULL; break; } | |
2207 | ||
2208 | /* Set up for the next header */ | |
2209 | ||
2210 | header_size = 256; | |
2211 | next = store_get(sizeof(header_line)); | |
2212 | next->text = store_get(header_size); | |
2213 | ptr = 0; | |
2214 | had_zero = 0; | |
d677b2f2 | 2215 | prevlines_length = 0; |
059ec3d9 PH |
2216 | } /* Continue, starting to read the next header */ |
2217 | ||
2218 | /* At this point, we have read all the headers into a data structure in main | |
2219 | store. The first header is still the dummy placeholder for the Received: header | |
2220 | we are going to generate a bit later on. If next != NULL, it contains the first | |
2221 | data line - which terminated the headers before reaching a blank line (not the | |
2222 | normal case). */ | |
2223 | ||
2224 | DEBUG(D_receive) | |
2225 | { | |
2226 | debug_printf(">>Headers received:\n"); | |
1ebe15c3 | 2227 | for (h = header_list->next; h; h = h->next) |
059ec3d9 PH |
2228 | debug_printf("%s", h->text); |
2229 | debug_printf("\n"); | |
2230 | } | |
2231 | ||
2232 | /* End of file on any SMTP connection is an error. If an incoming SMTP call | |
2233 | is dropped immediately after valid headers, the next thing we will see is EOF. | |
2234 | We must test for this specially, as further down the reading of the data is | |
2235 | skipped if already at EOF. */ | |
2236 | ||
2237 | if (smtp_input && (receive_feof)()) | |
2238 | { | |
2239 | smtp_reply = handle_lost_connection(US" (after header)"); | |
2240 | smtp_yield = FALSE; | |
2241 | goto TIDYUP; /* Skip to end of function */ | |
2242 | } | |
2243 | ||
2244 | /* If this is a filter test run and no headers were read, output a warning | |
2245 | in case there is a mistake in the test message. */ | |
2246 | ||
f05da2e8 | 2247 | if (filter_test != FTEST_NONE && header_list->next == NULL) |
059ec3d9 PH |
2248 | printf("Warning: no message headers read\n"); |
2249 | ||
2250 | ||
2251 | /* Scan the headers to identify them. Some are merely marked for later | |
2252 | processing; some are dealt with here. */ | |
2253 | ||
1ebe15c3 | 2254 | for (h = header_list->next; h; h = h->next) |
059ec3d9 PH |
2255 | { |
2256 | BOOL is_resent = strncmpic(h->text, US"resent-", 7) == 0; | |
2257 | if (is_resent) contains_resent_headers = TRUE; | |
2258 | ||
2259 | switch (header_checkname(h, is_resent)) | |
2260 | { | |
059ec3d9 | 2261 | case htype_bcc: |
2cbb4081 | 2262 | h->type = htype_bcc; /* Both Bcc: and Resent-Bcc: */ |
059ec3d9 PH |
2263 | break; |
2264 | ||
059ec3d9 | 2265 | case htype_cc: |
2cbb4081 | 2266 | h->type = htype_cc; /* Both Cc: and Resent-Cc: */ |
059ec3d9 PH |
2267 | break; |
2268 | ||
2269 | /* Record whether a Date: or Resent-Date: header exists, as appropriate. */ | |
2270 | ||
2271 | case htype_date: | |
4c69d561 | 2272 | if (!resents_exist || is_resent) date_header_exists = TRUE; |
059ec3d9 PH |
2273 | break; |
2274 | ||
2275 | /* Same comments as about Return-Path: below. */ | |
2276 | ||
2277 | case htype_delivery_date: | |
2278 | if (delivery_date_remove) h->type = htype_old; | |
2279 | break; | |
2280 | ||
2281 | /* Same comments as about Return-Path: below. */ | |
2282 | ||
2283 | case htype_envelope_to: | |
2284 | if (envelope_to_remove) h->type = htype_old; | |
2285 | break; | |
2286 | ||
2287 | /* Mark all "From:" headers so they get rewritten. Save the one that is to | |
2288 | be used for Sender: checking. For Sendmail compatibility, if the "From:" | |
2289 | header consists of just the login id of the user who called Exim, rewrite | |
2290 | it with the gecos field first. Apply this rule to Resent-From: if there | |
2291 | are resent- fields. */ | |
2292 | ||
2293 | case htype_from: | |
2294 | h->type = htype_from; | |
2295 | if (!resents_exist || is_resent) | |
2296 | { | |
2297 | from_header = h; | |
2298 | if (!smtp_input) | |
2299 | { | |
5de8faa3 | 2300 | int len; |
059ec3d9 PH |
2301 | uschar *s = Ustrchr(h->text, ':') + 1; |
2302 | while (isspace(*s)) s++; | |
5de8faa3 | 2303 | len = h->slen - (s - h->text) - 1; |
e0fccd1d TF |
2304 | if (Ustrlen(originator_login) == len && |
2305 | strncmpic(s, originator_login, len) == 0) | |
059ec3d9 PH |
2306 | { |
2307 | uschar *name = is_resent? US"Resent-From" : US"From"; | |
2308 | header_add(htype_from, "%s: %s <%s@%s>\n", name, originator_name, | |
2309 | originator_login, qualify_domain_sender); | |
2310 | from_header = header_last; | |
2311 | h->type = htype_old; | |
2312 | DEBUG(D_receive|D_rewrite) | |
2313 | debug_printf("rewrote \"%s:\" header using gecos\n", name); | |
2314 | } | |
2315 | } | |
2316 | } | |
2317 | break; | |
2318 | ||
2319 | /* Identify the Message-id: header for generating "in-reply-to" in the | |
2320 | autoreply transport. For incoming logging, save any resent- value. In both | |
2321 | cases, take just the first of any multiples. */ | |
2322 | ||
2323 | case htype_id: | |
2324 | if (msgid_header == NULL && (!resents_exist || is_resent)) | |
2325 | { | |
2326 | msgid_header = h; | |
2327 | h->type = htype_id; | |
2328 | } | |
2329 | break; | |
2330 | ||
2331 | /* Flag all Received: headers */ | |
2332 | ||
2333 | case htype_received: | |
2334 | h->type = htype_received; | |
2335 | received_count++; | |
2336 | break; | |
2337 | ||
2338 | /* "Reply-to:" is just noted (there is no resent-reply-to field) */ | |
2339 | ||
2340 | case htype_reply_to: | |
2341 | h->type = htype_reply_to; | |
2342 | break; | |
2343 | ||
2344 | /* The Return-path: header is supposed to be added to messages when | |
2345 | they leave the SMTP system. We shouldn't receive messages that already | |
2346 | contain Return-path. However, since Exim generates Return-path: on | |
2347 | local delivery, resent messages may well contain it. We therefore | |
2348 | provide an option (which defaults on) to remove any Return-path: headers | |
2349 | on input. Removal actually means flagging as "old", which prevents the | |
2350 | header being transmitted with the message. */ | |
2351 | ||
2352 | case htype_return_path: | |
2353 | if (return_path_remove) h->type = htype_old; | |
2354 | ||
2355 | /* If we are testing a mail filter file, use the value of the | |
2356 | Return-Path: header to set up the return_path variable, which is not | |
2357 | otherwise set. However, remove any <> that surround the address | |
2358 | because the variable doesn't have these. */ | |
2359 | ||
f05da2e8 | 2360 | if (filter_test != FTEST_NONE) |
059ec3d9 PH |
2361 | { |
2362 | uschar *start = h->text + 12; | |
2363 | uschar *end = start + Ustrlen(start); | |
2364 | while (isspace(*start)) start++; | |
2365 | while (end > start && isspace(end[-1])) end--; | |
2366 | if (*start == '<' && end[-1] == '>') | |
2367 | { | |
2368 | start++; | |
2369 | end--; | |
2370 | } | |
2371 | return_path = string_copyn(start, end - start); | |
2372 | printf("Return-path taken from \"Return-path:\" header line\n"); | |
2373 | } | |
2374 | break; | |
2375 | ||
2376 | /* If there is a "Sender:" header and the message is locally originated, | |
8800895a PH |
2377 | and from an untrusted caller and suppress_local_fixups is not set, or if we |
2378 | are in submission mode for a remote message, mark it "old" so that it will | |
2379 | not be transmitted with the message, unless active_local_sender_retain is | |
2380 | set. (This can only be true if active_local_from_check is false.) If there | |
2381 | are any resent- headers in the message, apply this rule to Resent-Sender: | |
2382 | instead of Sender:. Messages with multiple resent- header sets cannot be | |
2383 | tidily handled. (For this reason, at least one MUA - Pine - turns old | |
2384 | resent- headers into X-resent- headers when resending, leaving just one | |
2385 | set.) */ | |
059ec3d9 PH |
2386 | |
2387 | case htype_sender: | |
69358f02 | 2388 | h->type = ((!active_local_sender_retain && |
8800895a PH |
2389 | ( |
2390 | (sender_local && !trusted_caller && !suppress_local_fixups) | |
2391 | || submission_mode | |
2392 | ) | |
059ec3d9 PH |
2393 | ) && |
2394 | (!resents_exist||is_resent))? | |
2395 | htype_old : htype_sender; | |
2396 | break; | |
2397 | ||
2398 | /* Remember the Subject: header for logging. There is no Resent-Subject */ | |
2399 | ||
2400 | case htype_subject: | |
2401 | subject_header = h; | |
2402 | break; | |
2403 | ||
2404 | /* "To:" gets flagged, and the existence of a recipient header is noted, | |
2405 | whether it's resent- or not. */ | |
2406 | ||
2407 | case htype_to: | |
2408 | h->type = htype_to; | |
2409 | /**** | |
2410 | to_or_cc_header_exists = TRUE; | |
2411 | ****/ | |
2412 | break; | |
2413 | } | |
2414 | } | |
2415 | ||
2416 | /* Extract recipients from the headers if that is required (the -t option). | |
2417 | Note that this is documented as being done *before* any address rewriting takes | |
2418 | place. There are two possibilities: | |
2419 | ||
2420 | (1) According to sendmail documentation for Solaris, IRIX, and HP-UX, any | |
2421 | recipients already listed are to be REMOVED from the message. Smail 3 works | |
2422 | like this. We need to build a non-recipients tree for that list, because in | |
2423 | subsequent processing this data is held in a tree and that's what the | |
2424 | spool_write_header() function expects. Make sure that non-recipient addresses | |
2425 | are fully qualified and rewritten if necessary. | |
2426 | ||
2427 | (2) According to other sendmail documentation, -t ADDS extracted recipients to | |
2428 | those in the command line arguments (and it is rumoured some other MTAs do | |
2429 | this). Therefore, there is an option to make Exim behave this way. | |
2430 | ||
2431 | *** Notes on "Resent-" header lines *** | |
2432 | ||
2433 | The presence of resent-headers in the message makes -t horribly ambiguous. | |
2434 | Experiments with sendmail showed that it uses recipients for all resent- | |
2435 | headers, totally ignoring the concept of "sets of resent- headers" as described | |
2436 | in RFC 2822 section 3.6.6. Sendmail also amalgamates them into a single set | |
2437 | with all the addresses in one instance of each header. | |
2438 | ||
2439 | This seems to me not to be at all sensible. Before release 4.20, Exim 4 gave an | |
2440 | error for -t if there were resent- headers in the message. However, after a | |
2441 | discussion on the mailing list, I've learned that there are MUAs that use | |
2442 | resent- headers with -t, and also that the stuff about sets of resent- headers | |
2443 | and their ordering in RFC 2822 is generally ignored. An MUA that submits a | |
2444 | message with -t and resent- header lines makes sure that only *its* resent- | |
2445 | headers are present; previous ones are often renamed as X-resent- for example. | |
2446 | ||
2447 | Consequently, Exim has been changed so that, if any resent- header lines are | |
2448 | present, the recipients are taken from all of the appropriate resent- lines, | |
2449 | and not from the ordinary To:, Cc:, etc. */ | |
2450 | ||
2451 | if (extract_recip) | |
2452 | { | |
2453 | int rcount = 0; | |
2454 | error_block **bnext = &bad_addresses; | |
2455 | ||
2456 | if (extract_addresses_remove_arguments) | |
2457 | { | |
2458 | while (recipients_count-- > 0) | |
2459 | { | |
2460 | uschar *s = rewrite_address(recipients_list[recipients_count].address, | |
2461 | TRUE, TRUE, global_rewrite_rules, rewrite_existflags); | |
2462 | tree_add_nonrecipient(s); | |
2463 | } | |
2464 | recipients_list = NULL; | |
2465 | recipients_count = recipients_list_max = 0; | |
2466 | } | |
2467 | ||
059ec3d9 PH |
2468 | /* Now scan the headers */ |
2469 | ||
1ebe15c3 | 2470 | for (h = header_list->next; h; h = h->next) |
059ec3d9 PH |
2471 | { |
2472 | if ((h->type == htype_to || h->type == htype_cc || h->type == htype_bcc) && | |
2473 | (!contains_resent_headers || strncmpic(h->text, US"resent-", 7) == 0)) | |
2474 | { | |
2475 | uschar *s = Ustrchr(h->text, ':') + 1; | |
2476 | while (isspace(*s)) s++; | |
2477 | ||
1eccaa59 PH |
2478 | parse_allow_group = TRUE; /* Allow address group syntax */ |
2479 | ||
059ec3d9 PH |
2480 | while (*s != 0) |
2481 | { | |
2482 | uschar *ss = parse_find_address_end(s, FALSE); | |
2483 | uschar *recipient, *errmess, *p, *pp; | |
2484 | int start, end, domain; | |
2485 | ||
2486 | /* Check on maximum */ | |
2487 | ||
2488 | if (recipients_max > 0 && ++rcount > recipients_max) | |
2489 | { | |
2490 | give_local_error(ERRMESS_TOOMANYRECIP, US"too many recipients", | |
2491 | US"message rejected: ", error_rc, stdin, NULL); | |
2492 | /* Does not return */ | |
2493 | } | |
2494 | ||
2495 | /* Make a copy of the address, and remove any internal newlines. These | |
2496 | may be present as a result of continuations of the header line. The | |
2497 | white space that follows the newline must not be removed - it is part | |
2498 | of the header. */ | |
2499 | ||
2500 | pp = recipient = store_get(ss - s + 1); | |
2501 | for (p = s; p < ss; p++) if (*p != '\n') *pp++ = *p; | |
2502 | *pp = 0; | |
250b6871 | 2503 | |
8c5d388a | 2504 | #ifdef SUPPORT_I18N |
250b6871 JH |
2505 | { |
2506 | BOOL b = allow_utf8_domains; | |
2507 | allow_utf8_domains = TRUE; | |
2508 | #endif | |
059ec3d9 PH |
2509 | recipient = parse_extract_address(recipient, &errmess, &start, &end, |
2510 | &domain, FALSE); | |
2511 | ||
8c5d388a | 2512 | #ifdef SUPPORT_I18N |
250b6871 JH |
2513 | if (string_is_utf8(recipient)) |
2514 | message_smtputf8 = TRUE; | |
2515 | else | |
2516 | allow_utf8_domains = b; | |
2517 | } | |
2518 | #endif | |
2519 | ||
059ec3d9 PH |
2520 | /* Keep a list of all the bad addresses so we can send a single |
2521 | error message at the end. However, an empty address is not an error; | |
2522 | just ignore it. This can come from an empty group list like | |
2523 | ||
2524 | To: Recipients of list:; | |
2525 | ||
2526 | If there are no recipients at all, an error will occur later. */ | |
2527 | ||
2528 | if (recipient == NULL && Ustrcmp(errmess, "empty address") != 0) | |
2529 | { | |
2530 | int len = Ustrlen(s); | |
2531 | error_block *b = store_get(sizeof(error_block)); | |
2532 | while (len > 0 && isspace(s[len-1])) len--; | |
2533 | b->next = NULL; | |
2534 | b->text1 = string_printing(string_copyn(s, len)); | |
2535 | b->text2 = errmess; | |
2536 | *bnext = b; | |
2537 | bnext = &(b->next); | |
2538 | } | |
2539 | ||
2540 | /* If the recipient is already in the nonrecipients tree, it must | |
2541 | have appeared on the command line with the option extract_addresses_ | |
2542 | remove_arguments set. Do not add it to the recipients, and keep a note | |
2543 | that this has happened, in order to give a better error if there are | |
2544 | no recipients left. */ | |
2545 | ||
2546 | else if (recipient != NULL) | |
2547 | { | |
2548 | if (tree_search(tree_nonrecipients, recipient) == NULL) | |
2549 | receive_add_recipient(recipient, -1); | |
2550 | else | |
2551 | extracted_ignored = TRUE; | |
2552 | } | |
2553 | ||
2554 | /* Move on past this address */ | |
2555 | ||
2556 | s = ss + (*ss? 1:0); | |
2557 | while (isspace(*s)) s++; | |
1eccaa59 PH |
2558 | } /* Next address */ |
2559 | ||
2560 | parse_allow_group = FALSE; /* Reset group syntax flags */ | |
2561 | parse_found_group = FALSE; | |
059ec3d9 PH |
2562 | |
2563 | /* If this was the bcc: header, mark it "old", which means it | |
2564 | will be kept on the spool, but not transmitted as part of the | |
2565 | message. */ | |
2566 | ||
2cbb4081 | 2567 | if (h->type == htype_bcc) h->type = htype_old; |
059ec3d9 PH |
2568 | } /* For appropriate header line */ |
2569 | } /* For each header line */ | |
2570 | ||
059ec3d9 PH |
2571 | } |
2572 | ||
2573 | /* Now build the unique message id. This has changed several times over the | |
2574 | lifetime of Exim. This description was rewritten for Exim 4.14 (February 2003). | |
2575 | Retaining all the history in the comment has become too unwieldy - read | |
2576 | previous release sources if you want it. | |
2577 | ||
2578 | The message ID has 3 parts: tttttt-pppppp-ss. Each part is a number in base 62. | |
2579 | The first part is the current time, in seconds. The second part is the current | |
2580 | pid. Both are large enough to hold 32-bit numbers in base 62. The third part | |
2581 | can hold a number in the range 0-3843. It used to be a computed sequence | |
2582 | number, but is now the fractional component of the current time in units of | |
2583 | 1/2000 of a second (i.e. a value in the range 0-1999). After a message has been | |
2584 | received, Exim ensures that the timer has ticked at the appropriate level | |
2585 | before proceeding, to avoid duplication if the pid happened to be re-used | |
2586 | within the same time period. It seems likely that most messages will take at | |
2587 | least half a millisecond to be received, so no delay will normally be | |
2588 | necessary. At least for some time... | |
2589 | ||
2590 | There is a modification when localhost_number is set. Formerly this was allowed | |
2591 | to be as large as 255. Now it is restricted to the range 0-16, and the final | |
2592 | component of the message id becomes (localhost_number * 200) + fractional time | |
2593 | in units of 1/200 of a second (i.e. a value in the range 0-3399). | |
2594 | ||
2595 | Some not-really-Unix operating systems use case-insensitive file names (Darwin, | |
2596 | Cygwin). For these, we have to use base 36 instead of base 62. Luckily, this | |
2597 | still allows the tttttt field to hold a large enough number to last for some | |
2598 | more decades, and the final two-digit field can hold numbers up to 1295, which | |
2599 | is enough for milliseconds (instead of 1/2000 of a second). | |
2600 | ||
2601 | However, the pppppp field cannot hold a 32-bit pid, but it can hold a 31-bit | |
2602 | pid, so it is probably safe because pids have to be positive. The | |
2603 | localhost_number is restricted to 0-10 for these hosts, and when it is set, the | |
2604 | final field becomes (localhost_number * 100) + fractional time in centiseconds. | |
2605 | ||
2606 | Note that string_base62() returns its data in a static storage block, so it | |
2607 | must be copied before calling string_base62() again. It always returns exactly | |
2608 | 6 characters. | |
2609 | ||
2610 | There doesn't seem to be anything in the RFC which requires a message id to | |
2611 | start with a letter, but Smail was changed to ensure this. The external form of | |
2612 | the message id (as supplied by string expansion) therefore starts with an | |
2613 | additional leading 'E'. The spool file names do not include this leading | |
2614 | letter and it is not used internally. | |
2615 | ||
2616 | NOTE: If ever the format of message ids is changed, the regular expression for | |
2617 | checking that a string is in this format must be updated in a corresponding | |
2618 | way. It appears in the initializing code in exim.c. The macro MESSAGE_ID_LENGTH | |
2619 | must also be changed to reflect the correct string length. Then, of course, | |
2620 | other programs that rely on the message id format will need updating too. */ | |
2621 | ||
2622 | Ustrncpy(message_id, string_base62((long int)(message_id_tv.tv_sec)), 6); | |
2623 | message_id[6] = '-'; | |
2624 | Ustrncpy(message_id + 7, string_base62((long int)getpid()), 6); | |
2625 | ||
2626 | /* Deal with the case where the host number is set. The value of the number was | |
2627 | checked when it was read, to ensure it isn't too big. The timing granularity is | |
2628 | left in id_resolution so that an appropriate wait can be done after receiving | |
2629 | the message, if necessary (we hope it won't be). */ | |
2630 | ||
2631 | if (host_number_string != NULL) | |
2632 | { | |
2633 | id_resolution = (BASE_62 == 62)? 5000 : 10000; | |
2634 | sprintf(CS(message_id + MESSAGE_ID_LENGTH - 3), "-%2s", | |
2635 | string_base62((long int)( | |
2636 | host_number * (1000000/id_resolution) + | |
2637 | message_id_tv.tv_usec/id_resolution)) + 4); | |
2638 | } | |
2639 | ||
2640 | /* Host number not set: final field is just the fractional time at an | |
2641 | appropriate resolution. */ | |
2642 | ||
2643 | else | |
2644 | { | |
2645 | id_resolution = (BASE_62 == 62)? 500 : 1000; | |
2646 | sprintf(CS(message_id + MESSAGE_ID_LENGTH - 3), "-%2s", | |
2647 | string_base62((long int)(message_id_tv.tv_usec/id_resolution)) + 4); | |
2648 | } | |
2649 | ||
2650 | /* Add the current message id onto the current process info string if | |
2651 | it will fit. */ | |
2652 | ||
2653 | (void)string_format(process_info + process_info_len, | |
2654 | PROCESS_INFO_SIZE - process_info_len, " id=%s", message_id); | |
2655 | ||
2656 | /* If we are using multiple input directories, set up the one for this message | |
2657 | to be the least significant base-62 digit of the time of arrival. Otherwise | |
2658 | ensure that it is an empty string. */ | |
2659 | ||
a2da3176 | 2660 | message_subdir[0] = split_spool_directory ? message_id[5] : 0; |
059ec3d9 PH |
2661 | |
2662 | /* Now that we have the message-id, if there is no message-id: header, generate | |
8800895a PH |
2663 | one, but only for local (without suppress_local_fixups) or submission mode |
2664 | messages. This can be user-configured if required, but we had better flatten | |
2665 | any illegal characters therein. */ | |
059ec3d9 | 2666 | |
8800895a PH |
2667 | if (msgid_header == NULL && |
2668 | ((sender_host_address == NULL && !suppress_local_fixups) | |
2669 | || submission_mode)) | |
059ec3d9 PH |
2670 | { |
2671 | uschar *p; | |
2672 | uschar *id_text = US""; | |
2673 | uschar *id_domain = primary_hostname; | |
2674 | ||
2675 | /* Permit only letters, digits, dots, and hyphens in the domain */ | |
2676 | ||
2677 | if (message_id_domain != NULL) | |
2678 | { | |
2679 | uschar *new_id_domain = expand_string(message_id_domain); | |
2680 | if (new_id_domain == NULL) | |
2681 | { | |
2682 | if (!expand_string_forcedfail) | |
2683 | log_write(0, LOG_MAIN|LOG_PANIC, | |
2684 | "expansion of \"%s\" (message_id_header_domain) " | |
2685 | "failed: %s", message_id_domain, expand_string_message); | |
2686 | } | |
2687 | else if (*new_id_domain != 0) | |
2688 | { | |
2689 | id_domain = new_id_domain; | |
2690 | for (p = id_domain; *p != 0; p++) | |
2691 | if (!isalnum(*p) && *p != '.') *p = '-'; /* No need to test '-' ! */ | |
2692 | } | |
2693 | } | |
2694 | ||
2695 | /* Permit all characters except controls and RFC 2822 specials in the | |
2696 | additional text part. */ | |
2697 | ||
2698 | if (message_id_text != NULL) | |
2699 | { | |
2700 | uschar *new_id_text = expand_string(message_id_text); | |
2701 | if (new_id_text == NULL) | |
2702 | { | |
2703 | if (!expand_string_forcedfail) | |
2704 | log_write(0, LOG_MAIN|LOG_PANIC, | |
2705 | "expansion of \"%s\" (message_id_header_text) " | |
2706 | "failed: %s", message_id_text, expand_string_message); | |
2707 | } | |
2708 | else if (*new_id_text != 0) | |
2709 | { | |
2710 | id_text = new_id_text; | |
2711 | for (p = id_text; *p != 0; p++) | |
2712 | if (mac_iscntrl_or_special(*p)) *p = '-'; | |
2713 | } | |
2714 | } | |
2715 | ||
e7e680d6 PP |
2716 | /* Add the header line |
2717 | * Resent-* headers are prepended, per RFC 5322 3.6.6. Non-Resent-* are | |
2718 | * appended, to preserve classical expectations of header ordering. */ | |
059ec3d9 | 2719 | |
e7e680d6 | 2720 | header_add_at_position(!resents_exist, NULL, FALSE, htype_id, |
5eb690a1 NM |
2721 | "%sMessage-Id: <%s%s%s@%s>\n", resent_prefix, message_id_external, |
2722 | (*id_text == 0)? "" : ".", id_text, id_domain); | |
059ec3d9 PH |
2723 | } |
2724 | ||
2725 | /* If we are to log recipients, keep a copy of the raw ones before any possible | |
2726 | rewriting. Must copy the count, because later ACLs and the local_scan() | |
2727 | function may mess with the real recipients. */ | |
2728 | ||
6c6d6e48 | 2729 | if (LOGGING(received_recipients)) |
059ec3d9 PH |
2730 | { |
2731 | raw_recipients = store_get(recipients_count * sizeof(uschar *)); | |
2732 | for (i = 0; i < recipients_count; i++) | |
2733 | raw_recipients[i] = string_copy(recipients_list[i].address); | |
2734 | raw_recipients_count = recipients_count; | |
2735 | } | |
2736 | ||
2737 | /* Ensure the recipients list is fully qualified and rewritten. Unqualified | |
2738 | recipients will get here only if the conditions were right (allow_unqualified_ | |
2739 | recipient is TRUE). */ | |
2740 | ||
2741 | for (i = 0; i < recipients_count; i++) | |
2742 | recipients_list[i].address = | |
2743 | rewrite_address(recipients_list[i].address, TRUE, TRUE, | |
2744 | global_rewrite_rules, rewrite_existflags); | |
2745 | ||
8800895a PH |
2746 | /* If there is no From: header, generate one for local (without |
2747 | suppress_local_fixups) or submission_mode messages. If there is no sender | |
2748 | address, but the sender is local or this is a local delivery error, use the | |
2749 | originator login. This shouldn't happen for genuine bounces, but might happen | |
2750 | for autoreplies. The addition of From: must be done *before* checking for the | |
2751 | possible addition of a Sender: header, because untrusted_set_sender allows an | |
2752 | untrusted user to set anything in the envelope (which might then get info | |
2753 | From:) but we still want to ensure a valid Sender: if it is required. */ | |
2754 | ||
2755 | if (from_header == NULL && | |
2756 | ((sender_host_address == NULL && !suppress_local_fixups) | |
2757 | || submission_mode)) | |
059ec3d9 | 2758 | { |
2fe1a124 PH |
2759 | uschar *oname = US""; |
2760 | ||
2761 | /* Use the originator_name if this is a locally submitted message and the | |
2762 | caller is not trusted. For trusted callers, use it only if -F was used to | |
2763 | force its value or if we have a non-SMTP message for which -f was not used | |
2764 | to set the sender. */ | |
2765 | ||
2766 | if (sender_host_address == NULL) | |
2767 | { | |
2768 | if (!trusted_caller || sender_name_forced || | |
2769 | (!smtp_input && !sender_address_forced)) | |
2770 | oname = originator_name; | |
2771 | } | |
2772 | ||
2773 | /* For non-locally submitted messages, the only time we use the originator | |
2774 | name is when it was forced by the /name= option on control=submission. */ | |
2775 | ||
2776 | else | |
2777 | { | |
2778 | if (submission_name != NULL) oname = submission_name; | |
2779 | } | |
2780 | ||
059ec3d9 PH |
2781 | /* Envelope sender is empty */ |
2782 | ||
2783 | if (sender_address[0] == 0) | |
2784 | { | |
87ba3f5f PH |
2785 | uschar *fromstart, *fromend; |
2786 | ||
2787 | fromstart = string_sprintf("%sFrom: %s%s", resent_prefix, | |
2fe1a124 PH |
2788 | oname, (oname[0] == 0)? "" : " <"); |
2789 | fromend = (oname[0] == 0)? US"" : US">"; | |
87ba3f5f | 2790 | |
059ec3d9 PH |
2791 | if (sender_local || local_error_message) |
2792 | { | |
87ba3f5f PH |
2793 | header_add(htype_from, "%s%s@%s%s\n", fromstart, |
2794 | local_part_quote(originator_login), qualify_domain_sender, | |
2795 | fromend); | |
059ec3d9 PH |
2796 | } |
2797 | else if (submission_mode && authenticated_id != NULL) | |
2798 | { | |
2799 | if (submission_domain == NULL) | |
2800 | { | |
87ba3f5f PH |
2801 | header_add(htype_from, "%s%s@%s%s\n", fromstart, |
2802 | local_part_quote(authenticated_id), qualify_domain_sender, | |
2803 | fromend); | |
059ec3d9 PH |
2804 | } |
2805 | else if (submission_domain[0] == 0) /* empty => whole address set */ | |
2806 | { | |
87ba3f5f PH |
2807 | header_add(htype_from, "%s%s%s\n", fromstart, authenticated_id, |
2808 | fromend); | |
059ec3d9 PH |
2809 | } |
2810 | else | |
2811 | { | |
87ba3f5f PH |
2812 | header_add(htype_from, "%s%s@%s%s\n", fromstart, |
2813 | local_part_quote(authenticated_id), submission_domain, | |
2814 | fromend); | |
059ec3d9 PH |
2815 | } |
2816 | from_header = header_last; /* To get it checked for Sender: */ | |
2817 | } | |
2818 | } | |
2819 | ||
2820 | /* There is a non-null envelope sender. Build the header using the original | |
2821 | sender address, before any rewriting that might have been done while | |
2822 | verifying it. */ | |
2823 | ||
2824 | else | |
2825 | { | |
87ba3f5f | 2826 | header_add(htype_from, "%sFrom: %s%s%s%s\n", resent_prefix, |
2fe1a124 PH |
2827 | oname, |
2828 | (oname[0] == 0)? "" : " <", | |
87ba3f5f PH |
2829 | (sender_address_unrewritten == NULL)? |
2830 | sender_address : sender_address_unrewritten, | |
2fe1a124 | 2831 | (oname[0] == 0)? "" : ">"); |
059ec3d9 PH |
2832 | |
2833 | from_header = header_last; /* To get it checked for Sender: */ | |
2834 | } | |
2835 | } | |
2836 | ||
2837 | ||
8800895a PH |
2838 | /* If the sender is local (without suppress_local_fixups), or if we are in |
2839 | submission mode and there is an authenticated_id, check that an existing From: | |
2840 | is correct, and if not, generate a Sender: header, unless disabled. Any | |
2841 | previously-existing Sender: header was removed above. Note that sender_local, | |
2842 | as well as being TRUE if the caller of exim is not trusted, is also true if a | |
2843 | trusted caller did not supply a -f argument for non-smtp input. To allow | |
2844 | trusted callers to forge From: without supplying -f, we have to test explicitly | |
2845 | here. If the From: header contains more than one address, then the call to | |
2846 | parse_extract_address fails, and a Sender: header is inserted, as required. */ | |
059ec3d9 PH |
2847 | |
2848 | if (from_header != NULL && | |
69358f02 | 2849 | (active_local_from_check && |
8800895a | 2850 | ((sender_local && !trusted_caller && !suppress_local_fixups) || |
69358f02 | 2851 | (submission_mode && authenticated_id != NULL)) |
059ec3d9 PH |
2852 | )) |
2853 | { | |
2854 | BOOL make_sender = TRUE; | |
2855 | int start, end, domain; | |
2856 | uschar *errmess; | |
2857 | uschar *from_address = | |
2858 | parse_extract_address(Ustrchr(from_header->text, ':') + 1, &errmess, | |
2859 | &start, &end, &domain, FALSE); | |
2860 | uschar *generated_sender_address; | |
2861 | ||
2862 | if (submission_mode) | |
2863 | { | |
2864 | if (submission_domain == NULL) | |
2865 | { | |
2866 | generated_sender_address = string_sprintf("%s@%s", | |
2867 | local_part_quote(authenticated_id), qualify_domain_sender); | |
2868 | } | |
2869 | else if (submission_domain[0] == 0) /* empty => full address */ | |
2870 | { | |
2871 | generated_sender_address = string_sprintf("%s", | |
2872 | authenticated_id); | |
2873 | } | |
2874 | else | |
2875 | { | |
2876 | generated_sender_address = string_sprintf("%s@%s", | |
2877 | local_part_quote(authenticated_id), submission_domain); | |
2878 | } | |
2879 | } | |
2880 | else | |
2881 | generated_sender_address = string_sprintf("%s@%s", | |
2882 | local_part_quote(originator_login), qualify_domain_sender); | |
2883 | ||
2884 | /* Remove permitted prefixes and suffixes from the local part of the From: | |
2885 | address before doing the comparison with the generated sender. */ | |
2886 | ||
2887 | if (from_address != NULL) | |
2888 | { | |
2889 | int slen; | |
2890 | uschar *at = (domain == 0)? NULL : from_address + domain - 1; | |
2891 | ||
2892 | if (at != NULL) *at = 0; | |
2893 | from_address += route_check_prefix(from_address, local_from_prefix); | |
2894 | slen = route_check_suffix(from_address, local_from_suffix); | |
2895 | if (slen > 0) | |
2896 | { | |
2897 | memmove(from_address+slen, from_address, Ustrlen(from_address)-slen); | |
2898 | from_address += slen; | |
2899 | } | |
2900 | if (at != NULL) *at = '@'; | |
2901 | ||
2902 | if (strcmpic(generated_sender_address, from_address) == 0 || | |
2903 | (domain == 0 && strcmpic(from_address, originator_login) == 0)) | |
2904 | make_sender = FALSE; | |
2905 | } | |
2906 | ||
2907 | /* We have to cause the Sender header to be rewritten if there are | |
2908 | appropriate rewriting rules. */ | |
2909 | ||
2910 | if (make_sender) | |
2911 | { | |
2fe1a124 | 2912 | if (submission_mode && submission_name == NULL) |
059ec3d9 PH |
2913 | header_add(htype_sender, "%sSender: %s\n", resent_prefix, |
2914 | generated_sender_address); | |
2915 | else | |
2916 | header_add(htype_sender, "%sSender: %s <%s>\n", | |
2fe1a124 PH |
2917 | resent_prefix, |
2918 | submission_mode? submission_name : originator_name, | |
2919 | generated_sender_address); | |
059ec3d9 | 2920 | } |
87ba3f5f PH |
2921 | |
2922 | /* Ensure that a non-null envelope sender address corresponds to the | |
2923 | submission mode sender address. */ | |
2924 | ||
2925 | if (submission_mode && sender_address[0] != 0) | |
2926 | { | |
2927 | if (sender_address_unrewritten == NULL) | |
2928 | sender_address_unrewritten = sender_address; | |
2929 | sender_address = generated_sender_address; | |
089793a4 TF |
2930 | if (Ustrcmp(sender_address_unrewritten, generated_sender_address) != 0) |
2931 | log_write(L_address_rewrite, LOG_MAIN, | |
2932 | "\"%s\" from env-from rewritten as \"%s\" by submission mode", | |
2933 | sender_address_unrewritten, generated_sender_address); | |
87ba3f5f | 2934 | } |
059ec3d9 PH |
2935 | } |
2936 | ||
059ec3d9 PH |
2937 | /* If there are any rewriting rules, apply them to the sender address, unless |
2938 | it has already been rewritten as part of verification for SMTP input. */ | |
2939 | ||
2940 | if (global_rewrite_rules != NULL && sender_address_unrewritten == NULL && | |
2941 | sender_address[0] != 0) | |
2942 | { | |
2943 | sender_address = rewrite_address(sender_address, FALSE, TRUE, | |
2944 | global_rewrite_rules, rewrite_existflags); | |
2945 | DEBUG(D_receive|D_rewrite) | |
2946 | debug_printf("rewritten sender = %s\n", sender_address); | |
2947 | } | |
2948 | ||
2949 | ||
2950 | /* The headers must be run through rewrite_header(), because it ensures that | |
2951 | addresses are fully qualified, as well as applying any rewriting rules that may | |
2952 | exist. | |
2953 | ||
2954 | Qualification of header addresses in a message from a remote host happens only | |
2955 | if the host is in sender_unqualified_hosts or recipient_unqualified hosts, as | |
2956 | appropriate. For local messages, qualification always happens, unless -bnq is | |
2957 | used to explicitly suppress it. No rewriting is done for an unqualified address | |
2958 | that is left untouched. | |
2959 | ||
2960 | We start at the second header, skipping our own Received:. This rewriting is | |
2961 | documented as happening *after* recipient addresses are taken from the headers | |
2962 | by the -t command line option. An added Sender: gets rewritten here. */ | |
2963 | ||
1ebe15c3 | 2964 | for (h = header_list->next; h; h = h->next) |
059ec3d9 PH |
2965 | { |
2966 | header_line *newh = rewrite_header(h, NULL, NULL, global_rewrite_rules, | |
2967 | rewrite_existflags, TRUE); | |
1ebe15c3 | 2968 | if (newh) h = newh; |
059ec3d9 PH |
2969 | } |
2970 | ||
2971 | ||
2972 | /* An RFC 822 (sic) message is not legal unless it has at least one of "to", | |
2cbb4081 | 2973 | "cc", or "bcc". Note that although the minimal examples in RFC 822 show just |
059ec3d9 PH |
2974 | "to" or "bcc", the full syntax spec allows "cc" as well. If any resent- header |
2975 | exists, this applies to the set of resent- headers rather than the normal set. | |
2976 | ||
2cbb4081 PH |
2977 | The requirement for a recipient header has been removed in RFC 2822. At this |
2978 | point in the code, earlier versions of Exim added a To: header for locally | |
2979 | submitted messages, and an empty Bcc: header for others. In the light of the | |
2980 | changes in RFC 2822, this was dropped in November 2003. */ | |
059ec3d9 | 2981 | |
059ec3d9 PH |
2982 | |
2983 | /* If there is no date header, generate one if the message originates locally | |
8800895a PH |
2984 | (i.e. not over TCP/IP) and suppress_local_fixups is not set, or if the |
2985 | submission mode flag is set. Messages without Date: are not valid, but it seems | |
e7e680d6 PP |
2986 | to be more confusing if Exim adds one to all remotely-originated messages. |
2987 | As per Message-Id, we prepend if resending, else append. | |
2988 | */ | |
059ec3d9 | 2989 | |
8800895a PH |
2990 | if (!date_header_exists && |
2991 | ((sender_host_address == NULL && !suppress_local_fixups) | |
2992 | || submission_mode)) | |
e7e680d6 PP |
2993 | header_add_at_position(!resents_exist, NULL, FALSE, htype_other, |
2994 | "%sDate: %s\n", resent_prefix, tod_stamp(tod_full)); | |
059ec3d9 PH |
2995 | |
2996 | search_tidyup(); /* Free any cached resources */ | |
2997 | ||
2998 | /* Show the complete set of headers if debugging. Note that the first one (the | |
2999 | new Received:) has not yet been set. */ | |
3000 | ||
3001 | DEBUG(D_receive) | |
3002 | { | |
3003 | debug_printf(">>Headers after rewriting and local additions:\n"); | |
3004 | for (h = header_list->next; h != NULL; h = h->next) | |
3005 | debug_printf("%c %s", h->type, h->text); | |
3006 | debug_printf("\n"); | |
3007 | } | |
3008 | ||
3009 | /* The headers are now complete in store. If we are running in filter | |
3010 | testing mode, that is all this function does. Return TRUE if the message | |
3011 | ended with a dot. */ | |
3012 | ||
f05da2e8 | 3013 | if (filter_test != FTEST_NONE) |
059ec3d9 PH |
3014 | { |
3015 | process_info[process_info_len] = 0; | |
3016 | return message_ended == END_DOT; | |
3017 | } | |
3018 | ||
7e3ce68e JH |
3019 | /*XXX CHUNKING: need to cancel cutthrough under BDAT, for now. In future, |
3020 | think more if it could be handled. Cannot do onward CHUNKING unless | |
3021 | inbound is, but inbound chunking ought to be ok with outbound plain. | |
3022 | Could we do onward CHUNKING given inbound CHUNKING? | |
3023 | */ | |
3024 | if (chunking_state > CHUNKING_OFFERED) | |
57cc2785 | 3025 | cancel_cutthrough_connection(FALSE, US"chunking active"); |
7e3ce68e | 3026 | |
817d9f57 | 3027 | /* Cutthrough delivery: |
5032d1cf JH |
3028 | We have to create the Received header now rather than at the end of reception, |
3029 | so the timestamp behaviour is a change to the normal case. | |
5032d1cf | 3030 | Having created it, send the headers to the destination. */ |
57cc2785 JH |
3031 | |
3032 | if (cutthrough.fd >= 0 && cutthrough.delivery) | |
e4bdf652 | 3033 | { |
817d9f57 JH |
3034 | if (received_count > received_headers_max) |
3035 | { | |
57cc2785 | 3036 | cancel_cutthrough_connection(TRUE, US"too many headers"); |
817d9f57 JH |
3037 | if (smtp_input) receive_swallow_smtp(); /* Swallow incoming SMTP */ |
3038 | log_write(0, LOG_MAIN|LOG_REJECT, "rejected from <%s>%s%s%s%s: " | |
3039 | "Too many \"Received\" headers", | |
3040 | sender_address, | |
57cc2785 JH |
3041 | sender_fullhost ? "H=" : "", sender_fullhost ? sender_fullhost : US"", |
3042 | sender_ident ? "U=" : "", sender_ident ? sender_ident : US""); | |
817d9f57 JH |
3043 | message_id[0] = 0; /* Indicate no message accepted */ |
3044 | smtp_reply = US"550 Too many \"Received\" headers - suspected mail loop"; | |
3045 | goto TIDYUP; /* Skip to end of function */ | |
3046 | } | |
e4bdf652 | 3047 | received_header_gen(); |
578d43dc | 3048 | add_acl_headers(ACL_WHERE_RCPT, US"MAIL or RCPT"); |
e4bdf652 JH |
3049 | (void) cutthrough_headers_send(); |
3050 | } | |
61147df4 | 3051 | |
e4bdf652 | 3052 | |
059ec3d9 PH |
3053 | /* Open a new spool file for the data portion of the message. We need |
3054 | to access it both via a file descriptor and a stream. Try to make the | |
41313d92 | 3055 | directory if it isn't there. */ |
059ec3d9 | 3056 | |
41313d92 | 3057 | spool_name = spool_fname(US"input", message_subdir, message_id, US"-D"); |
a2da3176 JH |
3058 | DEBUG(D_receive) debug_printf("Data file name: %s\n", spool_name); |
3059 | ||
3060 | if ((data_fd = Uopen(spool_name, O_RDWR|O_CREAT|O_EXCL, SPOOL_MODE)) < 0) | |
059ec3d9 PH |
3061 | { |
3062 | if (errno == ENOENT) | |
3063 | { | |
0971ec06 | 3064 | (void) directory_make(spool_directory, |
41313d92 JH |
3065 | spool_sname(US"input", message_subdir), |
3066 | INPUT_DIRECTORY_MODE, TRUE); | |
059ec3d9 PH |
3067 | data_fd = Uopen(spool_name, O_RDWR|O_CREAT|O_EXCL, SPOOL_MODE); |
3068 | } | |
3069 | if (data_fd < 0) | |
3070 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to create spool file %s: %s", | |
3071 | spool_name, strerror(errno)); | |
3072 | } | |
3073 | ||
3074 | /* Make sure the file's group is the Exim gid, and double-check the mode | |
3075 | because the group setting doesn't always get set automatically. */ | |
3076 | ||
1ac6b2e7 JH |
3077 | if (fchown(data_fd, exim_uid, exim_gid)) |
3078 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, | |
3079 | "Failed setting ownership on spool file %s: %s", | |
3080 | spool_name, strerror(errno)); | |
ff790e47 | 3081 | (void)fchmod(data_fd, SPOOL_MODE); |
059ec3d9 PH |
3082 | |
3083 | /* We now have data file open. Build a stream for it and lock it. We lock only | |
3084 | the first line of the file (containing the message ID) because otherwise there | |
3085 | are problems when Exim is run under Cygwin (I'm told). See comments in | |
3086 | spool_in.c, where the same locking is done. */ | |
3087 | ||
3088 | data_file = fdopen(data_fd, "w+"); | |
3089 | lock_data.l_type = F_WRLCK; | |
3090 | lock_data.l_whence = SEEK_SET; | |
3091 | lock_data.l_start = 0; | |
3092 | lock_data.l_len = SPOOL_DATA_START_OFFSET; | |
3093 | ||
3094 | if (fcntl(data_fd, F_SETLK, &lock_data) < 0) | |
3095 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Cannot lock %s (%d): %s", spool_name, | |
3096 | errno, strerror(errno)); | |
3097 | ||
3098 | /* We have an open, locked data file. Write the message id to it to make it | |
3099 | self-identifying. Then read the remainder of the input of this message and | |
3100 | write it to the data file. If the variable next != NULL, it contains the first | |
3101 | data line (which was read as a header but then turned out not to have the right | |
3102 | format); write it (remembering that it might contain binary zeros). The result | |
3103 | of fwrite() isn't inspected; instead we call ferror() below. */ | |
3104 | ||
3105 | fprintf(data_file, "%s-D\n", message_id); | |
3106 | if (next != NULL) | |
3107 | { | |
3108 | uschar *s = next->text; | |
3109 | int len = next->slen; | |
1ac6b2e7 | 3110 | len = fwrite(s, 1, len, data_file); len = len; /* compiler quietening */ |
059ec3d9 PH |
3111 | body_linecount++; /* Assumes only 1 line */ |
3112 | } | |
3113 | ||
3114 | /* Note that we might already be at end of file, or the logical end of file | |
3115 | (indicated by '.'), or might have encountered an error while writing the | |
3116 | message id or "next" line. */ | |
3117 | ||
3118 | if (!ferror(data_file) && !(receive_feof)() && message_ended != END_DOT) | |
3119 | { | |
3120 | if (smtp_input) | |
3121 | { | |
328c5688 JH |
3122 | message_ended = chunking_state <= CHUNKING_OFFERED |
3123 | ? read_message_data_smtp(data_file) | |
3124 | : spool_wireformat | |
3125 | ? read_message_bdat_smtp_wire(data_file) | |
3126 | : read_message_bdat_smtp(data_file); | |
059ec3d9 PH |
3127 | receive_linecount++; /* The terminating "." line */ |
3128 | } | |
3129 | else message_ended = read_message_data(data_file); | |
3130 | ||
3131 | receive_linecount += body_linecount; /* For BSMTP errors mainly */ | |
2e0c1448 | 3132 | message_linecount += body_linecount; |
059ec3d9 | 3133 | |
7e3ce68e | 3134 | switch (message_ended) |
059ec3d9 | 3135 | { |
7e3ce68e | 3136 | /* Handle premature termination of SMTP */ |
059ec3d9 | 3137 | |
7e3ce68e JH |
3138 | case END_EOF: |
3139 | if (smtp_input) | |
3140 | { | |
3141 | Uunlink(spool_name); /* Lose data file when closed */ | |
57cc2785 | 3142 | cancel_cutthrough_connection(TRUE, US"sender closed connection"); |
7e3ce68e JH |
3143 | message_id[0] = 0; /* Indicate no message accepted */ |
3144 | smtp_reply = handle_lost_connection(US""); | |
3145 | smtp_yield = FALSE; | |
3146 | goto TIDYUP; /* Skip to end of function */ | |
3147 | } | |
3148 | break; | |
059ec3d9 | 3149 | |
7e3ce68e JH |
3150 | /* Handle message that is too big. Don't use host_or_ident() in the log |
3151 | message; we want to see the ident value even for non-remote messages. */ | |
059ec3d9 | 3152 | |
7e3ce68e JH |
3153 | case END_SIZE: |
3154 | Uunlink(spool_name); /* Lose the data file when closed */ | |
57cc2785 | 3155 | cancel_cutthrough_connection(TRUE, US"mail too big"); |
7e3ce68e | 3156 | if (smtp_input) receive_swallow_smtp(); /* Swallow incoming SMTP */ |
059ec3d9 | 3157 | |
7e3ce68e JH |
3158 | log_write(L_size_reject, LOG_MAIN|LOG_REJECT, "rejected from <%s>%s%s%s%s: " |
3159 | "message too big: read=%d max=%d", | |
3160 | sender_address, | |
3161 | (sender_fullhost == NULL)? "" : " H=", | |
3162 | (sender_fullhost == NULL)? US"" : sender_fullhost, | |
3163 | (sender_ident == NULL)? "" : " U=", | |
3164 | (sender_ident == NULL)? US"" : sender_ident, | |
3165 | message_size, | |
3166 | thismessage_size_limit); | |
3167 | ||
3168 | if (smtp_input) | |
3169 | { | |
3170 | smtp_reply = US"552 Message size exceeds maximum permitted"; | |
3171 | message_id[0] = 0; /* Indicate no message accepted */ | |
3172 | goto TIDYUP; /* Skip to end of function */ | |
3173 | } | |
3174 | else | |
3175 | { | |
3176 | fseek(data_file, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3177 | give_local_error(ERRMESS_TOOBIG, | |
3178 | string_sprintf("message too big (max=%d)", thismessage_size_limit), | |
3179 | US"message rejected: ", error_rc, data_file, header_list); | |
3180 | /* Does not return */ | |
3181 | } | |
3182 | break; | |
3183 | ||
3184 | /* Handle bad BDAT protocol sequence */ | |
3185 | ||
3186 | case END_PROTOCOL: | |
3187 | Uunlink(spool_name); /* Lose the data file when closed */ | |
57cc2785 | 3188 | cancel_cutthrough_connection(TRUE, US"sender protocol error"); |
7e3ce68e JH |
3189 | smtp_reply = US""; /* Response already sent */ |
3190 | message_id[0] = 0; /* Indicate no message accepted */ | |
3191 | goto TIDYUP; /* Skip to end of function */ | |
059ec3d9 PH |
3192 | } |
3193 | } | |
3194 | ||
3195 | /* Restore the standard SIGALRM handler for any subsequent processing. (For | |
3196 | example, there may be some expansion in an ACL that uses a timer.) */ | |
3197 | ||
3198 | os_non_restarting_signal(SIGALRM, sigalrm_handler); | |
3199 | ||
3200 | /* The message body has now been read into the data file. Call fflush() to | |
3201 | empty the buffers in C, and then call fsync() to get the data written out onto | |
3202 | the disk, as fflush() doesn't do this (or at least, it isn't documented as | |
3203 | having to do this). If there was an I/O error on either input or output, | |
3204 | attempt to send an error message, and unlink the spool file. For non-SMTP input | |
3205 | we can then give up. Note that for SMTP input we must swallow the remainder of | |
3206 | the input in cases of output errors, since the far end doesn't expect to see | |
3207 | anything until the terminating dot line is sent. */ | |
3208 | ||
3209 | if (fflush(data_file) == EOF || ferror(data_file) || | |
54fc8428 | 3210 | EXIMfsync(fileno(data_file)) < 0 || (receive_ferror)()) |
059ec3d9 PH |
3211 | { |
3212 | uschar *msg_errno = US strerror(errno); | |
3213 | BOOL input_error = (receive_ferror)() != 0; | |
3214 | uschar *msg = string_sprintf("%s error (%s) while receiving message from %s", | |
3215 | input_error? "Input read" : "Spool write", | |
3216 | msg_errno, | |
3217 | (sender_fullhost != NULL)? sender_fullhost : sender_ident); | |
3218 | ||
3219 | log_write(0, LOG_MAIN, "Message abandoned: %s", msg); | |
3220 | Uunlink(spool_name); /* Lose the data file */ | |
57cc2785 | 3221 | cancel_cutthrough_connection(TRUE, US"error writing spoolfile"); |
059ec3d9 PH |
3222 | |
3223 | if (smtp_input) | |
3224 | { | |
3225 | if (input_error) | |
3226 | smtp_reply = US"451 Error while reading input data"; | |
3227 | else | |
3228 | { | |
3229 | smtp_reply = US"451 Error while writing spool file"; | |
3230 | receive_swallow_smtp(); | |
3231 | } | |
3232 | message_id[0] = 0; /* Indicate no message accepted */ | |
3233 | goto TIDYUP; /* Skip to end of function */ | |
3234 | } | |
3235 | ||
3236 | else | |
3237 | { | |
3238 | fseek(data_file, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3239 | give_local_error(ERRMESS_IOERR, msg, US"", error_rc, data_file, | |
3240 | header_list); | |
3241 | /* Does not return */ | |
3242 | } | |
3243 | } | |
3244 | ||
3245 | ||
3246 | /* No I/O errors were encountered while writing the data file. */ | |
3247 | ||
3248 | DEBUG(D_receive) debug_printf("Data file written for message %s\n", message_id); | |
3249 | ||
3250 | ||
3251 | /* If there were any bad addresses extracted by -t, or there were no recipients | |
3252 | left after -t, send a message to the sender of this message, or write it to | |
3253 | stderr if the error handling option is set that way. Note that there may | |
3254 | legitimately be no recipients for an SMTP message if they have all been removed | |
3255 | by "discard". | |
3256 | ||
3257 | We need to rewind the data file in order to read it. In the case of no | |
3258 | recipients or stderr error writing, throw the data file away afterwards, and | |
3259 | exit. (This can't be SMTP, which always ensures there's at least one | |
3260 | syntactically good recipient address.) */ | |
3261 | ||
3262 | if (extract_recip && (bad_addresses != NULL || recipients_count == 0)) | |
3263 | { | |
3264 | DEBUG(D_receive) | |
3265 | { | |
3266 | if (recipients_count == 0) debug_printf("*** No recipients\n"); | |
3267 | if (bad_addresses != NULL) | |
3268 | { | |
3269 | error_block *eblock = bad_addresses; | |
3270 | debug_printf("*** Bad address(es)\n"); | |
3271 | while (eblock != NULL) | |
3272 | { | |
3273 | debug_printf(" %s: %s\n", eblock->text1, eblock->text2); | |
3274 | eblock = eblock->next; | |
3275 | } | |
3276 | } | |
3277 | } | |
3278 | ||
3279 | fseek(data_file, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3280 | ||
3281 | /* If configured to send errors to the sender, but this fails, force | |
3282 | a failure error code. We use a special one for no recipients so that it | |
3283 | can be detected by the autoreply transport. Otherwise error_rc is set to | |
3284 | errors_sender_rc, which is EXIT_FAILURE unless -oee was given, in which case | |
3285 | it is EXIT_SUCCESS. */ | |
3286 | ||
3287 | if (error_handling == ERRORS_SENDER) | |
3288 | { | |
3289 | if (!moan_to_sender( | |
3290 | (bad_addresses == NULL)? | |
3291 | (extracted_ignored? ERRMESS_IGADDRESS : ERRMESS_NOADDRESS) : | |
3292 | (recipients_list == NULL)? ERRMESS_BADNOADDRESS : ERRMESS_BADADDRESS, | |
3293 | bad_addresses, header_list, data_file, FALSE)) | |
3294 | error_rc = (bad_addresses == NULL)? EXIT_NORECIPIENTS : EXIT_FAILURE; | |
3295 | } | |
3296 | else | |
3297 | { | |
3298 | if (bad_addresses == NULL) | |
3299 | { | |
3300 | if (extracted_ignored) | |
3301 | fprintf(stderr, "exim: all -t recipients overridden by command line\n"); | |
3302 | else | |
3303 | fprintf(stderr, "exim: no recipients in message\n"); | |
3304 | } | |
3305 | else | |
3306 | { | |
3307 | fprintf(stderr, "exim: invalid address%s", | |
3308 | (bad_addresses->next == NULL)? ":" : "es:\n"); | |
3309 | while (bad_addresses != NULL) | |
3310 | { | |
3311 | fprintf(stderr, " %s: %s\n", bad_addresses->text1, | |
3312 | bad_addresses->text2); | |
3313 | bad_addresses = bad_addresses->next; | |
3314 | } | |
3315 | } | |
3316 | } | |
3317 | ||
3318 | if (recipients_count == 0 || error_handling == ERRORS_STDERR) | |
3319 | { | |
3320 | Uunlink(spool_name); | |
f1e894f3 | 3321 | (void)fclose(data_file); |
059ec3d9 PH |
3322 | exim_exit(error_rc); |
3323 | } | |
3324 | } | |
3325 | ||
3326 | /* Data file successfully written. Generate text for the Received: header by | |
3327 | expanding the configured string, and adding a timestamp. By leaving this | |
3328 | operation till now, we ensure that the timestamp is the time that message | |
3329 | reception was completed. However, this is deliberately done before calling the | |
3330 | data ACL and local_scan(). | |
3331 | ||
3332 | This Received: header may therefore be inspected by the data ACL and by code in | |
3333 | the local_scan() function. When they have run, we update the timestamp to be | |
3334 | the final time of reception. | |
3335 | ||
3336 | If there is just one recipient, set up its value in the $received_for variable | |
3337 | for use when we generate the Received: header. | |
3338 | ||
3339 | Note: the checking for too many Received: headers is handled by the delivery | |
3340 | code. */ | |
e4bdf652 | 3341 | /*XXX eventually add excess Received: check for cutthrough case back when classifying them */ |
059ec3d9 | 3342 | |
e4bdf652 | 3343 | if (received_header->text == NULL) /* Non-cutthrough case */ |
059ec3d9 | 3344 | { |
e4bdf652 | 3345 | received_header_gen(); |
059ec3d9 | 3346 | |
e4bdf652 | 3347 | /* Set the value of message_body_size for the DATA ACL and for local_scan() */ |
059ec3d9 | 3348 | |
e4bdf652 JH |
3349 | message_body_size = (fstat(data_fd, &statbuf) == 0)? |
3350 | statbuf.st_size - SPOOL_DATA_START_OFFSET : -1; | |
059ec3d9 | 3351 | |
e4bdf652 JH |
3352 | /* If an ACL from any RCPT commands set up any warning headers to add, do so |
3353 | now, before running the DATA ACL. */ | |
059ec3d9 | 3354 | |
578d43dc | 3355 | add_acl_headers(ACL_WHERE_RCPT, US"MAIL or RCPT"); |
e4bdf652 | 3356 | } |
817d9f57 | 3357 | else |
e4bdf652 JH |
3358 | message_body_size = (fstat(data_fd, &statbuf) == 0)? |
3359 | statbuf.st_size - SPOOL_DATA_START_OFFSET : -1; | |
059ec3d9 PH |
3360 | |
3361 | /* If an ACL is specified for checking things at this stage of reception of a | |
3362 | message, run it, unless all the recipients were removed by "discard" in earlier | |
3363 | ACLs. That is the only case in which recipients_count can be zero at this | |
3364 | stage. Set deliver_datafile to point to the data file so that $message_body and | |
3365 | $message_body_end can be extracted if needed. Allow $recipients in expansions. | |
3366 | */ | |
3367 | ||
3368 | deliver_datafile = data_fd; | |
4e88a19f | 3369 | user_msg = NULL; |
059ec3d9 | 3370 | |
0e20aff9 MH |
3371 | enable_dollar_recipients = TRUE; |
3372 | ||
059ec3d9 | 3373 | if (recipients_count == 0) |
7e3ce68e JH |
3374 | blackholed_by = recipients_discarded ? US"MAIL ACL" : US"RCPT ACL"; |
3375 | ||
059ec3d9 PH |
3376 | else |
3377 | { | |
059ec3d9 PH |
3378 | /* Handle interactive SMTP messages */ |
3379 | ||
3380 | if (smtp_input && !smtp_batched_input) | |
3381 | { | |
8523533c | 3382 | |
80a47a2c TK |
3383 | #ifndef DISABLE_DKIM |
3384 | if (!dkim_disable_verify) | |
3385 | { | |
3386 | /* Finish verification, this will log individual signature results to | |
3387 | the mainlog */ | |
3388 | dkim_exim_verify_finish(); | |
3389 | ||
3390 | /* Check if we must run the DKIM ACL */ | |
7e3ce68e | 3391 | if (acl_smtp_dkim && dkim_verify_signers && *dkim_verify_signers) |
80a47a2c TK |
3392 | { |
3393 | uschar *dkim_verify_signers_expanded = | |
3394 | expand_string(dkim_verify_signers); | |
7e3ce68e | 3395 | if (!dkim_verify_signers_expanded) |
80a47a2c TK |
3396 | log_write(0, LOG_MAIN|LOG_PANIC, |
3397 | "expansion of dkim_verify_signers option failed: %s", | |
3398 | expand_string_message); | |
7e3ce68e | 3399 | |
80a47a2c TK |
3400 | else |
3401 | { | |
3402 | int sep = 0; | |
55414b25 | 3403 | const uschar *ptr = dkim_verify_signers_expanded; |
80a47a2c | 3404 | uschar *item = NULL; |
9e5d6b55 TK |
3405 | uschar *seen_items = NULL; |
3406 | int seen_items_size = 0; | |
3407 | int seen_items_offset = 0; | |
9122af94 TK |
3408 | /* Default to OK when no items are present */ |
3409 | rc = OK; | |
7e3ce68e | 3410 | while ((item = string_nextinlist(&ptr, &sep, NULL, 0))) |
80a47a2c | 3411 | { |
6119d1ea | 3412 | /* Prevent running ACL for an empty item */ |
7e3ce68e | 3413 | if (!item || !*item) continue; |
5032d1cf JH |
3414 | |
3415 | /* Only run ACL once for each domain or identity, | |
3416 | no matter how often it appears in the expanded list. */ | |
3417 | if (seen_items) | |
6119d1ea | 3418 | { |
ae9094bf | 3419 | uschar *seen_item = NULL; |
55414b25 | 3420 | const uschar *seen_items_list = seen_items; |
5032d1cf | 3421 | BOOL seen_this_item = FALSE; |
61147df4 | 3422 | |
ae9094bf | 3423 | while ((seen_item = string_nextinlist(&seen_items_list, &sep, |
7e3ce68e | 3424 | NULL, 0))) |
5032d1cf JH |
3425 | if (Ustrcmp(seen_item,item) == 0) |
3426 | { | |
3427 | seen_this_item = TRUE; | |
3428 | break; | |
3429 | } | |
3430 | ||
3431 | if (seen_this_item) | |
6119d1ea TK |
3432 | { |
3433 | DEBUG(D_receive) | |
5032d1cf JH |
3434 | debug_printf("acl_smtp_dkim: skipping signer %s, " |
3435 | "already seen\n", item); | |
6119d1ea TK |
3436 | continue; |
3437 | } | |
61147df4 | 3438 | |
5032d1cf JH |
3439 | seen_items = string_append(seen_items, &seen_items_size, |
3440 | &seen_items_offset, 1, ":"); | |
6119d1ea TK |
3441 | } |
3442 | ||
5032d1cf JH |
3443 | seen_items = string_append(seen_items, &seen_items_size, |
3444 | &seen_items_offset, 1, item); | |
4a73449b | 3445 | seen_items[seen_items_offset] = '\0'; |
6119d1ea TK |
3446 | |
3447 | DEBUG(D_receive) | |
5032d1cf JH |
3448 | debug_printf("calling acl_smtp_dkim for dkim_cur_signer=%s\n", |
3449 | item); | |
6119d1ea | 3450 | |
80a47a2c | 3451 | dkim_exim_acl_setup(item); |
5032d1cf JH |
3452 | rc = acl_check(ACL_WHERE_DKIM, NULL, acl_smtp_dkim, |
3453 | &user_msg, &log_msg); | |
6119d1ea TK |
3454 | |
3455 | if (rc != OK) | |
5032d1cf JH |
3456 | { |
3457 | DEBUG(D_receive) | |
3458 | debug_printf("acl_smtp_dkim: acl_check returned %d on %s, " | |
3459 | "skipping remaining items\n", rc, item); | |
57cc2785 | 3460 | cancel_cutthrough_connection(TRUE, US"dkim acl not ok"); |
5032d1cf JH |
3461 | break; |
3462 | } | |
80a47a2c | 3463 | } |
578d43dc | 3464 | add_acl_headers(ACL_WHERE_DKIM, US"DKIM"); |
80a47a2c TK |
3465 | if (rc == DISCARD) |
3466 | { | |
3467 | recipients_count = 0; | |
3468 | blackholed_by = US"DKIM ACL"; | |
3469 | if (log_msg != NULL) | |
3470 | blackhole_log_msg = string_sprintf(": %s", log_msg); | |
3471 | } | |
3472 | else if (rc != OK) | |
3473 | { | |
3474 | Uunlink(spool_name); | |
3475 | if (smtp_handle_acl_fail(ACL_WHERE_DKIM, rc, user_msg, log_msg) != 0) | |
85ffcba6 | 3476 | smtp_yield = FALSE; /* No more messages after dropped connection */ |
80a47a2c TK |
3477 | smtp_reply = US""; /* Indicate reply already sent */ |
3478 | message_id[0] = 0; /* Indicate no message accepted */ | |
3479 | goto TIDYUP; /* Skip to end of function */ | |
3480 | } | |
3481 | } | |
3482 | } | |
3483 | } | |
4a8ce2d8 | 3484 | #endif /* DISABLE_DKIM */ |
fb2274d4 | 3485 | |
8523533c | 3486 | #ifdef WITH_CONTENT_SCAN |
80a47a2c TK |
3487 | if (recipients_count > 0 && |
3488 | acl_smtp_mime != NULL && | |
54cdb463 PH |
3489 | !run_mime_acl(acl_smtp_mime, &smtp_yield, &smtp_reply, &blackholed_by)) |
3490 | goto TIDYUP; | |
8523533c TK |
3491 | #endif /* WITH_CONTENT_SCAN */ |
3492 | ||
4840604e TL |
3493 | #ifdef EXPERIMENTAL_DMARC |
3494 | dmarc_up = dmarc_store_data(from_header); | |
3495 | #endif /* EXPERIMENTAL_DMARC */ | |
3496 | ||
8ccd00b1 JH |
3497 | #ifndef DISABLE_PRDR |
3498 | if (prdr_requested && recipients_count > 1 && acl_smtp_data_prdr) | |
fd98a5c6 JH |
3499 | { |
3500 | unsigned int c; | |
3501 | int all_pass = OK; | |
3502 | int all_fail = FAIL; | |
3503 | ||
925ac8e4 | 3504 | smtp_printf("353 PRDR content analysis beginning\r\n", TRUE); |
fd98a5c6 JH |
3505 | /* Loop through recipients, responses must be in same order received */ |
3506 | for (c = 0; recipients_count > c; c++) | |
3507 | { | |
3508 | uschar * addr= recipients_list[c].address; | |
3509 | uschar * msg= US"PRDR R=<%s> %s"; | |
3510 | uschar * code; | |
3511 | DEBUG(D_receive) | |
3512 | debug_printf("PRDR processing recipient %s (%d of %d)\n", | |
3513 | addr, c+1, recipients_count); | |
3514 | rc = acl_check(ACL_WHERE_PRDR, addr, | |
3515 | acl_smtp_data_prdr, &user_msg, &log_msg); | |
3516 | ||
3517 | /* If any recipient rejected content, indicate it in final message */ | |
3518 | all_pass |= rc; | |
3519 | /* If all recipients rejected, indicate in final message */ | |
3520 | all_fail &= rc; | |
3521 | ||
3522 | switch (rc) | |
3523 | { | |
3524 | case OK: case DISCARD: code = US"250"; break; | |
3525 | case DEFER: code = US"450"; break; | |
3526 | default: code = US"550"; break; | |
3527 | } | |
3528 | if (user_msg != NULL) | |
3529 | smtp_user_msg(code, user_msg); | |
3530 | else | |
3531 | { | |
3532 | switch (rc) | |
3533 | { | |
3534 | case OK: case DISCARD: | |
3535 | msg = string_sprintf(CS msg, addr, "acceptance"); break; | |
3536 | case DEFER: | |
3537 | msg = string_sprintf(CS msg, addr, "temporary refusal"); break; | |
3538 | default: | |
3539 | msg = string_sprintf(CS msg, addr, "refusal"); break; | |
3540 | } | |
3541 | smtp_user_msg(code, msg); | |
3542 | } | |
3543 | if (log_msg) log_write(0, LOG_MAIN, "PRDR %s %s", addr, log_msg); | |
3544 | else if (user_msg) log_write(0, LOG_MAIN, "PRDR %s %s", addr, user_msg); | |
112b6a93 | 3545 | else log_write(0, LOG_MAIN, "%s", CS msg); |
fd98a5c6 JH |
3546 | |
3547 | if (rc != OK) { receive_remove_recipient(addr); c--; } | |
3548 | } | |
3549 | /* Set up final message, used if data acl gives OK */ | |
3550 | smtp_reply = string_sprintf("%s id=%s message %s", | |
3551 | all_fail == FAIL ? US"550" : US"250", | |
3552 | message_id, | |
3553 | all_fail == FAIL | |
3554 | ? US"rejected for all recipients" | |
3555 | : all_pass == OK | |
3556 | ? US"accepted" | |
3557 | : US"accepted for some recipients"); | |
3558 | if (recipients_count == 0) | |
3559 | { | |
3560 | message_id[0] = 0; /* Indicate no message accepted */ | |
3561 | goto TIDYUP; | |
3562 | } | |
3563 | } | |
3564 | else | |
3565 | prdr_requested = FALSE; | |
8ccd00b1 | 3566 | #endif /* !DISABLE_PRDR */ |
fd98a5c6 | 3567 | |
54cdb463 PH |
3568 | /* Check the recipients count again, as the MIME ACL might have changed |
3569 | them. */ | |
8523533c | 3570 | |
059ec3d9 PH |
3571 | if (acl_smtp_data != NULL && recipients_count > 0) |
3572 | { | |
059ec3d9 | 3573 | rc = acl_check(ACL_WHERE_DATA, NULL, acl_smtp_data, &user_msg, &log_msg); |
578d43dc | 3574 | add_acl_headers(ACL_WHERE_DATA, US"DATA"); |
059ec3d9 PH |
3575 | if (rc == DISCARD) |
3576 | { | |
3577 | recipients_count = 0; | |
3578 | blackholed_by = US"DATA ACL"; | |
57cc2785 | 3579 | if (log_msg) |
8e669ac1 | 3580 | blackhole_log_msg = string_sprintf(": %s", log_msg); |
57cc2785 | 3581 | cancel_cutthrough_connection(TRUE, US"data acl discard"); |
059ec3d9 PH |
3582 | } |
3583 | else if (rc != OK) | |
3584 | { | |
3585 | Uunlink(spool_name); | |
57cc2785 | 3586 | cancel_cutthrough_connection(TRUE, US"data acl not ok"); |
8523533c TK |
3587 | #ifdef WITH_CONTENT_SCAN |
3588 | unspool_mbox(); | |
6f0c431a PP |
3589 | #endif |
3590 | #ifdef EXPERIMENTAL_DCC | |
3591 | dcc_ok = 0; | |
8523533c | 3592 | #endif |
059ec3d9 | 3593 | if (smtp_handle_acl_fail(ACL_WHERE_DATA, rc, user_msg, log_msg) != 0) |
85ffcba6 | 3594 | smtp_yield = FALSE; /* No more messages after dropped connection */ |
059ec3d9 PH |
3595 | smtp_reply = US""; /* Indicate reply already sent */ |
3596 | message_id[0] = 0; /* Indicate no message accepted */ | |
3597 | goto TIDYUP; /* Skip to end of function */ | |
3598 | } | |
3599 | } | |
3600 | } | |
3601 | ||
3602 | /* Handle non-SMTP and batch SMTP (i.e. non-interactive) messages. Note that | |
3603 | we cannot take different actions for permanent and temporary rejections. */ | |
3604 | ||
54cdb463 | 3605 | else |
059ec3d9 | 3606 | { |
54cdb463 PH |
3607 | |
3608 | #ifdef WITH_CONTENT_SCAN | |
3609 | if (acl_not_smtp_mime != NULL && | |
3610 | !run_mime_acl(acl_not_smtp_mime, &smtp_yield, &smtp_reply, | |
3611 | &blackholed_by)) | |
3612 | goto TIDYUP; | |
3613 | #endif /* WITH_CONTENT_SCAN */ | |
3614 | ||
3615 | if (acl_not_smtp != NULL) | |
059ec3d9 | 3616 | { |
54cdb463 PH |
3617 | uschar *user_msg, *log_msg; |
3618 | rc = acl_check(ACL_WHERE_NOTSMTP, NULL, acl_not_smtp, &user_msg, &log_msg); | |
3619 | if (rc == DISCARD) | |
059ec3d9 | 3620 | { |
54cdb463 PH |
3621 | recipients_count = 0; |
3622 | blackholed_by = US"non-SMTP ACL"; | |
3623 | if (log_msg != NULL) | |
3624 | blackhole_log_msg = string_sprintf(": %s", log_msg); | |
059ec3d9 | 3625 | } |
54cdb463 | 3626 | else if (rc != OK) |
059ec3d9 | 3627 | { |
54cdb463 PH |
3628 | Uunlink(spool_name); |
3629 | #ifdef WITH_CONTENT_SCAN | |
3630 | unspool_mbox(); | |
6f0c431a PP |
3631 | #endif |
3632 | #ifdef EXPERIMENTAL_DCC | |
3633 | dcc_ok = 0; | |
54cdb463 | 3634 | #endif |
6ea85e9a PH |
3635 | /* The ACL can specify where rejections are to be logged, possibly |
3636 | nowhere. The default is main and reject logs. */ | |
3637 | ||
3638 | if (log_reject_target != 0) | |
3639 | log_write(0, log_reject_target, "F=<%s> rejected by non-SMTP ACL: %s", | |
3640 | sender_address, log_msg); | |
3641 | ||
54cdb463 PH |
3642 | if (user_msg == NULL) user_msg = US"local configuration problem"; |
3643 | if (smtp_batched_input) | |
3644 | { | |
3645 | moan_smtp_batch(NULL, "%d %s", 550, user_msg); | |
3646 | /* Does not return */ | |
3647 | } | |
3648 | else | |
3649 | { | |
3650 | fseek(data_file, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3651 | give_local_error(ERRMESS_LOCAL_ACL, user_msg, | |
3652 | US"message rejected by non-SMTP ACL: ", error_rc, data_file, | |
3653 | header_list); | |
3654 | /* Does not return */ | |
3655 | } | |
059ec3d9 | 3656 | } |
578d43dc | 3657 | add_acl_headers(ACL_WHERE_NOTSMTP, US"non-SMTP"); |
059ec3d9 | 3658 | } |
059ec3d9 PH |
3659 | } |
3660 | ||
54cdb463 PH |
3661 | /* The applicable ACLs have been run */ |
3662 | ||
059ec3d9 PH |
3663 | if (deliver_freeze) frozen_by = US"ACL"; /* for later logging */ |
3664 | if (queue_only_policy) queued_by = US"ACL"; | |
059ec3d9 PH |
3665 | } |
3666 | ||
8523533c TK |
3667 | #ifdef WITH_CONTENT_SCAN |
3668 | unspool_mbox(); | |
3669 | #endif | |
3670 | ||
6a8f9482 TK |
3671 | #ifdef EXPERIMENTAL_DCC |
3672 | dcc_ok = 0; | |
3673 | #endif | |
3674 | ||
3675 | ||
059ec3d9 PH |
3676 | /* The final check on the message is to run the scan_local() function. The |
3677 | version supplied with Exim always accepts, but this is a hook for sysadmins to | |
3678 | supply their own checking code. The local_scan() function is run even when all | |
3679 | the recipients have been discarded. */ | |
d315eda1 | 3680 | /*XXS could we avoid this for the standard case, given that few people will use it? */ |
059ec3d9 PH |
3681 | |
3682 | lseek(data_fd, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3683 | ||
3684 | /* Arrange to catch crashes in local_scan(), so that the -D file gets | |
3685 | deleted, and the incident gets logged. */ | |
3686 | ||
3687 | os_non_restarting_signal(SIGSEGV, local_scan_crash_handler); | |
3688 | os_non_restarting_signal(SIGFPE, local_scan_crash_handler); | |
3689 | os_non_restarting_signal(SIGILL, local_scan_crash_handler); | |
3690 | os_non_restarting_signal(SIGBUS, local_scan_crash_handler); | |
3691 | ||
3692 | DEBUG(D_receive) debug_printf("calling local_scan(); timeout=%d\n", | |
3693 | local_scan_timeout); | |
3694 | local_scan_data = NULL; | |
3695 | ||
3696 | os_non_restarting_signal(SIGALRM, local_scan_timeout_handler); | |
3697 | if (local_scan_timeout > 0) alarm(local_scan_timeout); | |
3698 | rc = local_scan(data_fd, &local_scan_data); | |
3699 | alarm(0); | |
3700 | os_non_restarting_signal(SIGALRM, sigalrm_handler); | |
3701 | ||
0e20aff9 MH |
3702 | enable_dollar_recipients = FALSE; |
3703 | ||
059ec3d9 PH |
3704 | store_pool = POOL_MAIN; /* In case changed */ |
3705 | DEBUG(D_receive) debug_printf("local_scan() returned %d %s\n", rc, | |
3706 | local_scan_data); | |
3707 | ||
3708 | os_non_restarting_signal(SIGSEGV, SIG_DFL); | |
3709 | os_non_restarting_signal(SIGFPE, SIG_DFL); | |
3710 | os_non_restarting_signal(SIGILL, SIG_DFL); | |
3711 | os_non_restarting_signal(SIGBUS, SIG_DFL); | |
3712 | ||
3713 | /* The length check is paranoia against some runaway code, and also because | |
3714 | (for a success return) lines in the spool file are read into big_buffer. */ | |
3715 | ||
3716 | if (local_scan_data != NULL) | |
3717 | { | |
3718 | int len = Ustrlen(local_scan_data); | |
3719 | if (len > LOCAL_SCAN_MAX_RETURN) len = LOCAL_SCAN_MAX_RETURN; | |
3720 | local_scan_data = string_copyn(local_scan_data, len); | |
3721 | } | |
3722 | ||
3723 | if (rc == LOCAL_SCAN_ACCEPT_FREEZE) | |
3724 | { | |
58eb016e | 3725 | if (!deliver_freeze) /* ACL might have already frozen */ |
059ec3d9 PH |
3726 | { |
3727 | deliver_freeze = TRUE; | |
3728 | deliver_frozen_at = time(NULL); | |
3729 | frozen_by = US"local_scan()"; | |
3730 | } | |
3731 | rc = LOCAL_SCAN_ACCEPT; | |
3732 | } | |
3733 | else if (rc == LOCAL_SCAN_ACCEPT_QUEUE) | |
3734 | { | |
3735 | if (!queue_only_policy) /* ACL might have already queued */ | |
3736 | { | |
3737 | queue_only_policy = TRUE; | |
3738 | queued_by = US"local_scan()"; | |
3739 | } | |
3740 | rc = LOCAL_SCAN_ACCEPT; | |
3741 | } | |
3742 | ||
3743 | /* Message accepted: remove newlines in local_scan_data because otherwise | |
3744 | the spool file gets corrupted. Ensure that all recipients are qualified. */ | |
3745 | ||
3746 | if (rc == LOCAL_SCAN_ACCEPT) | |
3747 | { | |
3748 | if (local_scan_data != NULL) | |
3749 | { | |
3750 | uschar *s; | |
3751 | for (s = local_scan_data; *s != 0; s++) if (*s == '\n') *s = ' '; | |
3752 | } | |
3753 | for (i = 0; i < recipients_count; i++) | |
3754 | { | |
3755 | recipient_item *r = recipients_list + i; | |
3756 | r->address = rewrite_address_qualify(r->address, TRUE); | |
3757 | if (r->errors_to != NULL) | |
3758 | r->errors_to = rewrite_address_qualify(r->errors_to, TRUE); | |
3759 | } | |
3760 | if (recipients_count == 0 && blackholed_by == NULL) | |
3761 | blackholed_by = US"local_scan"; | |
3762 | } | |
3763 | ||
3764 | /* Message rejected: newlines permitted in local_scan_data to generate | |
3765 | multiline SMTP responses. */ | |
3766 | ||
3767 | else | |
3768 | { | |
3769 | uschar *istemp = US""; | |
3770 | uschar *s = NULL; | |
a5bd321b | 3771 | uschar *smtp_code; |
059ec3d9 PH |
3772 | int size = 0; |
3773 | int sptr = 0; | |
059ec3d9 PH |
3774 | |
3775 | errmsg = local_scan_data; | |
3776 | ||
3777 | Uunlink(spool_name); /* Cancel this message */ | |
3778 | switch(rc) | |
3779 | { | |
3780 | default: | |
3781 | log_write(0, LOG_MAIN, "invalid return %d from local_scan(). Temporary " | |
3782 | "rejection given", rc); | |
3783 | goto TEMPREJECT; | |
3784 | ||
3785 | case LOCAL_SCAN_REJECT_NOLOGHDR: | |
6c6d6e48 | 3786 | BIT_CLEAR(log_selector, log_selector_size, Li_rejected_header); |
059ec3d9 PH |
3787 | /* Fall through */ |
3788 | ||
3789 | case LOCAL_SCAN_REJECT: | |
a5bd321b | 3790 | smtp_code = US"550"; |
059ec3d9 PH |
3791 | if (errmsg == NULL) errmsg = US"Administrative prohibition"; |
3792 | break; | |
3793 | ||
3794 | case LOCAL_SCAN_TEMPREJECT_NOLOGHDR: | |
6c6d6e48 | 3795 | BIT_CLEAR(log_selector, log_selector_size, Li_rejected_header); |
059ec3d9 PH |
3796 | /* Fall through */ |
3797 | ||
3798 | case LOCAL_SCAN_TEMPREJECT: | |
3799 | TEMPREJECT: | |
a5bd321b | 3800 | smtp_code = US"451"; |
059ec3d9 PH |
3801 | if (errmsg == NULL) errmsg = US"Temporary local problem"; |
3802 | istemp = US"temporarily "; | |
3803 | break; | |
3804 | } | |
3805 | ||
3806 | s = string_append(s, &size, &sptr, 2, US"F=", | |
3807 | (sender_address[0] == 0)? US"<>" : sender_address); | |
3808 | s = add_host_info_for_log(s, &size, &sptr); | |
3809 | s[sptr] = 0; | |
3810 | ||
3811 | log_write(0, LOG_MAIN|LOG_REJECT, "%s %srejected by local_scan(): %.256s", | |
3812 | s, istemp, string_printing(errmsg)); | |
3813 | ||
3814 | if (smtp_input) | |
3815 | { | |
3816 | if (!smtp_batched_input) | |
3817 | { | |
a5bd321b | 3818 | smtp_respond(smtp_code, 3, TRUE, errmsg); |
059ec3d9 PH |
3819 | message_id[0] = 0; /* Indicate no message accepted */ |
3820 | smtp_reply = US""; /* Indicate reply already sent */ | |
3821 | goto TIDYUP; /* Skip to end of function */ | |
3822 | } | |
3823 | else | |
3824 | { | |
a5bd321b | 3825 | moan_smtp_batch(NULL, "%s %s", smtp_code, errmsg); |
059ec3d9 PH |
3826 | /* Does not return */ |
3827 | } | |
3828 | } | |
3829 | else | |
3830 | { | |
3831 | fseek(data_file, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3832 | give_local_error(ERRMESS_LOCAL_SCAN, errmsg, | |
3833 | US"message rejected by local scan code: ", error_rc, data_file, | |
3834 | header_list); | |
3835 | /* Does not return */ | |
3836 | } | |
3837 | } | |
3838 | ||
3839 | /* Reset signal handlers to ignore signals that previously would have caused | |
3840 | the message to be abandoned. */ | |
3841 | ||
3842 | signal(SIGTERM, SIG_IGN); | |
3843 | signal(SIGINT, SIG_IGN); | |
3844 | ||
e4bdf652 | 3845 | |
059ec3d9 PH |
3846 | /* Ensure the first time flag is set in the newly-received message. */ |
3847 | ||
3848 | deliver_firsttime = TRUE; | |
3849 | ||
8523533c | 3850 | #ifdef EXPERIMENTAL_BRIGHTMAIL |
a2da3176 JH |
3851 | if (bmi_run == 1) |
3852 | { /* rewind data file */ | |
8523533c TK |
3853 | lseek(data_fd, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); |
3854 | bmi_verdicts = bmi_process_message(header_list, data_fd); | |
a2da3176 | 3855 | } |
8523533c TK |
3856 | #endif |
3857 | ||
4c04137d | 3858 | /* Update the timestamp in our Received: header to account for any time taken by |
059ec3d9 PH |
3859 | an ACL or by local_scan(). The new time is the time that all reception |
3860 | processing is complete. */ | |
3861 | ||
3862 | timestamp = expand_string(US"${tod_full}"); | |
3863 | tslen = Ustrlen(timestamp); | |
3864 | ||
3865 | memcpy(received_header->text + received_header->slen - tslen - 1, | |
3866 | timestamp, tslen); | |
3867 | ||
3868 | /* In MUA wrapper mode, ignore queueing actions set by ACL or local_scan() */ | |
3869 | ||
3870 | if (mua_wrapper) | |
3871 | { | |
3872 | deliver_freeze = FALSE; | |
3873 | queue_only_policy = FALSE; | |
3874 | } | |
3875 | ||
3876 | /* Keep the data file open until we have written the header file, in order to | |
3877 | hold onto the lock. In a -bh run, or if the message is to be blackholed, we | |
3878 | don't write the header file, and we unlink the data file. If writing the header | |
3879 | file fails, we have failed to accept this message. */ | |
3880 | ||
3881 | if (host_checking || blackholed_by != NULL) | |
3882 | { | |
3883 | header_line *h; | |
3884 | Uunlink(spool_name); | |
3885 | msg_size = 0; /* Compute size for log line */ | |
3886 | for (h = header_list; h != NULL; h = h->next) | |
3887 | if (h->type != '*') msg_size += h->slen; | |
3888 | } | |
3889 | ||
3890 | /* Write the -H file */ | |
3891 | ||
3892 | else | |
059ec3d9 PH |
3893 | if ((msg_size = spool_write_header(message_id, SW_RECEIVING, &errmsg)) < 0) |
3894 | { | |
3895 | log_write(0, LOG_MAIN, "Message abandoned: %s", errmsg); | |
3896 | Uunlink(spool_name); /* Lose the data file */ | |
3897 | ||
3898 | if (smtp_input) | |
3899 | { | |
3900 | smtp_reply = US"451 Error in writing spool file"; | |
3901 | message_id[0] = 0; /* Indicate no message accepted */ | |
3902 | goto TIDYUP; | |
3903 | } | |
3904 | else | |
3905 | { | |
3906 | fseek(data_file, (long int)SPOOL_DATA_START_OFFSET, SEEK_SET); | |
3907 | give_local_error(ERRMESS_IOERR, errmsg, US"", error_rc, data_file, | |
3908 | header_list); | |
3909 | /* Does not return */ | |
3910 | } | |
3911 | } | |
059ec3d9 PH |
3912 | |
3913 | ||
3914 | /* The message has now been successfully received. */ | |
3915 | ||
3916 | receive_messagecount++; | |
3917 | ||
3918 | /* In SMTP sessions we may receive several in one connection. After each one, | |
3919 | we wait for the clock to tick at the level of message-id granularity. This is | |
3920 | so that the combination of time+pid is unique, even on systems where the pid | |
3921 | can be re-used within our time interval. We can't shorten the interval without | |
3922 | re-designing the message-id. See comments above where the message id is | |
3923 | created. This is Something For The Future. */ | |
3924 | ||
3925 | message_id_tv.tv_usec = (message_id_tv.tv_usec/id_resolution) * id_resolution; | |
3926 | exim_wait_tick(&message_id_tv, id_resolution); | |
3927 | ||
3928 | /* Add data size to written header size. We do not count the initial file name | |
3929 | that is in the file, but we do add one extra for the notional blank line that | |
3930 | precedes the data. This total differs from message_size in that it include the | |
3931 | added Received: header and any other headers that got created locally. */ | |
3932 | ||
3933 | fflush(data_file); | |
3934 | fstat(data_fd, &statbuf); | |
3935 | ||
3936 | msg_size += statbuf.st_size - SPOOL_DATA_START_OFFSET + 1; | |
3937 | ||
3938 | /* Generate a "message received" log entry. We do this by building up a dynamic | |
3939 | string as required. Since we commonly want to add two items at a time, use a | |
3940 | macro to simplify the coding. We log the arrival of a new message while the | |
3941 | file is still locked, just in case the machine is *really* fast, and delivers | |
3942 | it first! Include any message id that is in the message - since the syntax of a | |
4c04137d | 3943 | message id is actually an addr-spec, we can use the parse routine to canonicalize |
059ec3d9 PH |
3944 | it. */ |
3945 | ||
3946 | size = 256; | |
3947 | sptr = 0; | |
3948 | s = store_get(size); | |
3949 | ||
27b9e5f4 JH |
3950 | s = string_append(s, &size, &sptr, 2, |
3951 | fake_response == FAIL ? US"(= " : US"<= ", | |
3952 | sender_address[0] == 0 ? US"<>" : sender_address); | |
3953 | if (message_reference) | |
059ec3d9 PH |
3954 | s = string_append(s, &size, &sptr, 2, US" R=", message_reference); |
3955 | ||
3956 | s = add_host_info_for_log(s, &size, &sptr); | |
3957 | ||
3958 | #ifdef SUPPORT_TLS | |
6c6d6e48 | 3959 | if (LOGGING(tls_cipher) && tls_in.cipher) |
817d9f57 | 3960 | s = string_append(s, &size, &sptr, 2, US" X=", tls_in.cipher); |
6c6d6e48 | 3961 | if (LOGGING(tls_certificate_verified) && tls_in.cipher) |
059ec3d9 | 3962 | s = string_append(s, &size, &sptr, 2, US" CV=", |
27b9e5f4 | 3963 | tls_in.certificate_verified ? "yes":"no"); |
6c6d6e48 | 3964 | if (LOGGING(tls_peerdn) && tls_in.peerdn) |
48ed62d9 | 3965 | s = string_append(s, &size, &sptr, 3, US" DN=\"", |
817d9f57 | 3966 | string_printing(tls_in.peerdn), US"\""); |
6c6d6e48 | 3967 | if (LOGGING(tls_sni) && tls_in.sni) |
3f0945ff | 3968 | s = string_append(s, &size, &sptr, 3, US" SNI=\"", |
817d9f57 | 3969 | string_printing(tls_in.sni), US"\""); |
3f0945ff | 3970 | #endif |
059ec3d9 | 3971 | |
8ccd00b1 | 3972 | if (sender_host_authenticated) |
059ec3d9 PH |
3973 | { |
3974 | s = string_append(s, &size, &sptr, 2, US" A=", sender_host_authenticated); | |
27b9e5f4 | 3975 | if (authenticated_id) |
c8e2fc1e | 3976 | { |
059ec3d9 | 3977 | s = string_append(s, &size, &sptr, 2, US":", authenticated_id); |
27b9e5f4 | 3978 | if (LOGGING(smtp_mailauth) && authenticated_sender) |
c8e2fc1e JH |
3979 | s = string_append(s, &size, &sptr, 2, US":", authenticated_sender); |
3980 | } | |
059ec3d9 PH |
3981 | } |
3982 | ||
8ccd00b1 | 3983 | #ifndef DISABLE_PRDR |
fd98a5c6 | 3984 | if (prdr_requested) |
7e3ce68e | 3985 | s = string_catn(s, &size, &sptr, US" PRDR", 5); |
fd98a5c6 | 3986 | #endif |
8ccd00b1 | 3987 | |
cee5f132 | 3988 | #ifdef SUPPORT_PROXY |
6c6d6e48 | 3989 | if (proxy_session && LOGGING(proxy)) |
e6d2a989 | 3990 | s = string_append(s, &size, &sptr, 2, US" PRX=", proxy_local_address); |
a3c86431 | 3991 | #endif |
fd98a5c6 | 3992 | |
7e3ce68e JH |
3993 | if (chunking_state > CHUNKING_OFFERED) |
3994 | s = string_catn(s, &size, &sptr, US" K", 2); | |
3995 | ||
059ec3d9 PH |
3996 | sprintf(CS big_buffer, "%d", msg_size); |
3997 | s = string_append(s, &size, &sptr, 2, US" S=", big_buffer); | |
3998 | ||
3c0a92dc JH |
3999 | /* log 8BITMIME mode announced in MAIL_FROM |
4000 | 0 ... no BODY= used | |
4001 | 7 ... 7BIT | |
4002 | 8 ... 8BITMIME */ | |
6c6d6e48 | 4003 | if (LOGGING(8bitmime)) |
c8e2fc1e | 4004 | { |
3c0a92dc JH |
4005 | sprintf(CS big_buffer, "%d", body_8bitmime); |
4006 | s = string_append(s, &size, &sptr, 2, US" M8S=", big_buffer); | |
c8e2fc1e | 4007 | } |
3c0a92dc | 4008 | |
afa6d3ad JH |
4009 | if (*queue_name) |
4010 | s = string_append(s, &size, &sptr, 2, US" Q=", queue_name); | |
4011 | ||
059ec3d9 PH |
4012 | /* If an addr-spec in a message-id contains a quoted string, it can contain |
4013 | any characters except " \ and CR and so in particular it can contain NL! | |
4014 | Therefore, make sure we use a printing-characters only version for the log. | |
4015 | Also, allow for domain literals in the message id. */ | |
4016 | ||
27b9e5f4 | 4017 | if (msgid_header) |
059ec3d9 PH |
4018 | { |
4019 | uschar *old_id; | |
4020 | BOOL save_allow_domain_literals = allow_domain_literals; | |
4021 | allow_domain_literals = TRUE; | |
4022 | old_id = parse_extract_address(Ustrchr(msgid_header->text, ':') + 1, | |
4023 | &errmsg, &start, &end, &domain, FALSE); | |
4024 | allow_domain_literals = save_allow_domain_literals; | |
4025 | if (old_id != NULL) | |
4026 | s = string_append(s, &size, &sptr, 2, US" id=", string_printing(old_id)); | |
4027 | } | |
4028 | ||
4029 | /* If subject logging is turned on, create suitable printing-character | |
4030 | text. By expanding $h_subject: we make use of the MIME decoding. */ | |
4031 | ||
6c6d6e48 | 4032 | if (LOGGING(subject) && subject_header != NULL) |
059ec3d9 PH |
4033 | { |
4034 | int i; | |
4035 | uschar *p = big_buffer; | |
4036 | uschar *ss = expand_string(US"$h_subject:"); | |
4037 | ||
4038 | /* Backslash-quote any double quotes or backslashes so as to make a | |
4039 | a C-like string, and turn any non-printers into escape sequences. */ | |
4040 | ||
4041 | *p++ = '\"'; | |
4042 | if (*ss != 0) for (i = 0; i < 100 && ss[i] != 0; i++) | |
4043 | { | |
4044 | if (ss[i] == '\"' || ss[i] == '\\') *p++ = '\\'; | |
4045 | *p++ = ss[i]; | |
4046 | } | |
4047 | *p++ = '\"'; | |
4048 | *p = 0; | |
4049 | s = string_append(s, &size, &sptr, 2, US" T=", string_printing(big_buffer)); | |
4050 | } | |
4051 | ||
4052 | /* Terminate the string: string_cat() and string_append() leave room, but do | |
4053 | not put the zero in. */ | |
4054 | ||
4055 | s[sptr] = 0; | |
4056 | ||
059ec3d9 PH |
4057 | /* Create a message log file if message logs are being used and this message is |
4058 | not blackholed. Write the reception stuff to it. We used to leave message log | |
e4bdf652 | 4059 | creation until the first delivery, but this has proved confusing for some |
059ec3d9 PH |
4060 | people. */ |
4061 | ||
4062 | if (message_logs && blackholed_by == NULL) | |
4063 | { | |
4064 | int fd; | |
4065 | ||
41313d92 | 4066 | spool_name = spool_fname(US"msglog", message_subdir, message_id, US""); |
a2da3176 JH |
4067 | |
4068 | if ( (fd = Uopen(spool_name, O_WRONLY|O_APPEND|O_CREAT, SPOOL_MODE)) < 0 | |
4069 | && errno == ENOENT | |
4070 | ) | |
059ec3d9 | 4071 | { |
41313d92 JH |
4072 | (void)directory_make(spool_directory, |
4073 | spool_sname(US"msglog", message_subdir), | |
4074 | MSGLOG_DIRECTORY_MODE, TRUE); | |
059ec3d9 PH |
4075 | fd = Uopen(spool_name, O_WRONLY|O_APPEND|O_CREAT, SPOOL_MODE); |
4076 | } | |
4077 | ||
4078 | if (fd < 0) | |
4079 | { | |
4080 | log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't open message log %s: %s", | |
4081 | spool_name, strerror(errno)); | |
4082 | } | |
4083 | ||
4084 | else | |
4085 | { | |
4086 | FILE *message_log = fdopen(fd, "a"); | |
4087 | if (message_log == NULL) | |
4088 | { | |
4089 | log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't fdopen message log %s: %s", | |
4090 | spool_name, strerror(errno)); | |
f1e894f3 | 4091 | (void)close(fd); |
059ec3d9 PH |
4092 | } |
4093 | else | |
4094 | { | |
4095 | uschar *now = tod_stamp(tod_log); | |
4096 | fprintf(message_log, "%s Received from %s\n", now, s+3); | |
4097 | if (deliver_freeze) fprintf(message_log, "%s frozen by %s\n", now, | |
4098 | frozen_by); | |
4099 | if (queue_only_policy) fprintf(message_log, | |
e8012beb JH |
4100 | "%s no immediate delivery: queued%s%s by %s\n", now, |
4101 | *queue_name ? " in " : "", *queue_name ? CS queue_name : "", | |
4102 | queued_by); | |
f1e894f3 | 4103 | (void)fclose(message_log); |
059ec3d9 PH |
4104 | } |
4105 | } | |
4106 | } | |
4107 | ||
58eb016e PH |
4108 | /* Everything has now been done for a successful message except logging its |
4109 | arrival, and outputting an SMTP response. While writing to the log, set a flag | |
4110 | to cause a call to receive_bomb_out() if the log cannot be opened. */ | |
4111 | ||
4112 | receive_call_bombout = TRUE; | |
4113 | ||
563b63fa PH |
4114 | /* Before sending an SMTP response in a TCP/IP session, we check to see if the |
4115 | connection has gone away. This can only be done if there is no unconsumed input | |
4116 | waiting in the local input buffer. We can test for this by calling | |
4117 | receive_smtp_buffered(). RFC 2920 (pipelining) explicitly allows for additional | |
4118 | input to be sent following the final dot, so the presence of following input is | |
4119 | not an error. | |
58eb016e | 4120 | |
563b63fa PH |
4121 | If the connection is still present, but there is no unread input for the |
4122 | socket, the result of a select() call will be zero. If, however, the connection | |
4123 | has gone away, or if there is pending input, the result of select() will be | |
4124 | non-zero. The two cases can be distinguished by trying to read the next input | |
4125 | character. If we succeed, we can unread it so that it remains in the local | |
4126 | buffer for handling later. If not, the connection has been lost. | |
58eb016e | 4127 | |
563b63fa PH |
4128 | Of course, since TCP/IP is asynchronous, there is always a chance that the |
4129 | connection will vanish between the time of this test and the sending of the | |
4130 | response, but the chance of this happening should be small. */ | |
4131 | ||
4132 | if (smtp_input && sender_host_address != NULL && !sender_host_notsocket && | |
4133 | !receive_smtp_buffered()) | |
58eb016e PH |
4134 | { |
4135 | struct timeval tv; | |
4136 | fd_set select_check; | |
4137 | FD_ZERO(&select_check); | |
4138 | FD_SET(fileno(smtp_in), &select_check); | |
4139 | tv.tv_sec = 0; | |
4140 | tv.tv_usec = 0; | |
4141 | ||
563b63fa | 4142 | if (select(fileno(smtp_in) + 1, &select_check, NULL, NULL, &tv) != 0) |
58eb016e | 4143 | { |
bd8fbe36 | 4144 | int c = (receive_getc)(GETC_BUFFER_UNLIMITED); |
80a47a2c | 4145 | if (c != EOF) (receive_ungetc)(c); else |
58eb016e | 4146 | { |
eea0defe | 4147 | smtp_notquit_exit(US"connection-lost", NULL, NULL); |
563b63fa PH |
4148 | smtp_reply = US""; /* No attempt to send a response */ |
4149 | smtp_yield = FALSE; /* Nothing more on this connection */ | |
58eb016e | 4150 | |
563b63fa | 4151 | /* Re-use the log line workspace */ |
58eb016e | 4152 | |
563b63fa | 4153 | sptr = 0; |
eea0defe | 4154 | s = string_cat(s, &size, &sptr, US"SMTP connection lost after final dot"); |
563b63fa PH |
4155 | s = add_host_info_for_log(s, &size, &sptr); |
4156 | s[sptr] = 0; | |
4157 | log_write(0, LOG_MAIN, "%s", s); | |
58eb016e | 4158 | |
563b63fa | 4159 | /* Delete the files for this aborted message. */ |
58eb016e | 4160 | |
41313d92 JH |
4161 | Uunlink(spool_fname(US"input", message_subdir, message_id, US"-D")); |
4162 | Uunlink(spool_fname(US"input", message_subdir, message_id, US"-H")); | |
4163 | Uunlink(spool_fname(US"msglog", message_subdir, message_id, US"")); | |
58eb016e | 4164 | |
563b63fa PH |
4165 | goto TIDYUP; |
4166 | } | |
58eb016e PH |
4167 | } |
4168 | } | |
4169 | ||
4170 | /* The connection has not gone away; we really are going to take responsibility | |
4171 | for this message. */ | |
4172 | ||
817d9f57 | 4173 | /* Cutthrough - had sender last-dot; assume we've sent (or bufferred) all |
e4bdf652 JH |
4174 | data onward by now. |
4175 | ||
817d9f57 | 4176 | Send dot onward. If accepted, wipe the spooled files, log as delivered and accept |
e4bdf652 | 4177 | the sender's dot (below). |
4c04137d | 4178 | If rejected: copy response to sender, wipe the spooled files, log appropriately. |
ff5929e3 JH |
4179 | If temp-reject: normally accept to sender, keep the spooled file - unless defer=pass |
4180 | in which case pass temp-reject back to initiator and dump the files. | |
e4bdf652 JH |
4181 | |
4182 | Having the normal spool files lets us do data-filtering, and store/forward on temp-reject. | |
817d9f57 JH |
4183 | |
4184 | XXX We do not handle queue-only, freezing, or blackholes. | |
e4bdf652 | 4185 | */ |
57cc2785 | 4186 | if(cutthrough.fd >= 0 && cutthrough.delivery) |
e4bdf652 | 4187 | { |
57cc2785 | 4188 | uschar * msg = cutthrough_finaldot(); /* Ask the target system to accept the message */ |
817d9f57 | 4189 | /* Logging was done in finaldot() */ |
e4bdf652 | 4190 | switch(msg[0]) |
817d9f57 JH |
4191 | { |
4192 | case '2': /* Accept. Do the same to the source; dump any spoolfiles. */ | |
b784ce7f | 4193 | cutthrough_done = ACCEPTED; |
817d9f57 | 4194 | break; /* message_id needed for SMTP accept below */ |
61147df4 | 4195 | |
ff5929e3 JH |
4196 | case '4': /* Temp-reject. Keep spoolfiles and accept, unless defer-pass mode. |
4197 | ... for which, pass back the exact error */ | |
4198 | if (cutthrough.defer_pass) smtp_reply = string_copy_malloc(msg); | |
4199 | /*FALLTRHOUGH*/ | |
4200 | ||
817d9f57 | 4201 | default: /* Unknown response, or error. Treat as temp-reject. */ |
b784ce7f | 4202 | cutthrough_done = TMP_REJ; /* Avoid the usual immediate delivery attempt */ |
817d9f57 | 4203 | break; /* message_id needed for SMTP accept below */ |
61147df4 | 4204 | |
817d9f57 | 4205 | case '5': /* Perm-reject. Do the same to the source. Dump any spoolfiles */ |
ff5929e3 | 4206 | smtp_reply = string_copy_malloc(msg); /* Pass on the exact error */ |
b784ce7f | 4207 | cutthrough_done = PERM_REJ; |
817d9f57 JH |
4208 | break; |
4209 | } | |
e4bdf652 | 4210 | } |
58eb016e | 4211 | |
8ccd00b1 JH |
4212 | #ifndef DISABLE_PRDR |
4213 | if(!smtp_reply || prdr_requested) | |
4214 | #else | |
4215 | if(!smtp_reply) | |
fd98a5c6 | 4216 | #endif |
e4bdf652 JH |
4217 | { |
4218 | log_write(0, LOG_MAIN | | |
6c6d6e48 TF |
4219 | (LOGGING(received_recipients)? LOG_RECIPIENTS : 0) | |
4220 | (LOGGING(received_sender)? LOG_SENDER : 0), | |
e4bdf652 JH |
4221 | "%s", s); |
4222 | ||
4223 | /* Log any control actions taken by an ACL or local_scan(). */ | |
58eb016e | 4224 | |
e4bdf652 JH |
4225 | if (deliver_freeze) log_write(0, LOG_MAIN, "frozen by %s", frozen_by); |
4226 | if (queue_only_policy) log_write(L_delay_delivery, LOG_MAIN, | |
e8012beb JH |
4227 | "no immediate delivery: queued%s%s by %s", |
4228 | *queue_name ? " in " : "", *queue_name ? CS queue_name : "", | |
4229 | queued_by); | |
e4bdf652 JH |
4230 | } |
4231 | receive_call_bombout = FALSE; | |
58eb016e | 4232 | |
059ec3d9 PH |
4233 | store_reset(s); /* The store for the main log message can be reused */ |
4234 | ||
4235 | /* If the message is frozen, and freeze_tell is set, do the telling. */ | |
4236 | ||
4237 | if (deliver_freeze && freeze_tell != NULL && freeze_tell[0] != 0) | |
4238 | { | |
4239 | moan_tell_someone(freeze_tell, NULL, US"Message frozen on arrival", | |
4240 | "Message %s was frozen on arrival by %s.\nThe sender is <%s>.\n", | |
4241 | message_id, frozen_by, sender_address); | |
4242 | } | |
4243 | ||
4244 | ||
4245 | /* Either a message has been successfully received and written to the two spool | |
4246 | files, or an error in writing the spool has occurred for an SMTP message, or | |
58eb016e PH |
4247 | an SMTP message has been rejected for policy reasons. (For a non-SMTP message |
4248 | we will have already given up because there's no point in carrying on!) In | |
4249 | either event, we must now close (and thereby unlock) the data file. In the | |
059ec3d9 PH |
4250 | successful case, this leaves the message on the spool, ready for delivery. In |
4251 | the error case, the spool file will be deleted. Then tidy up store, interact | |
4252 | with an SMTP call if necessary, and return. | |
4253 | ||
4254 | A fflush() was done earlier in the expectation that any write errors on the | |
4255 | data file will be flushed(!) out thereby. Nevertheless, it is theoretically | |
4256 | possible for fclose() to fail - but what to do? What has happened to the lock | |
4257 | if this happens? */ | |
4258 | ||
e4bdf652 | 4259 | |
059ec3d9 | 4260 | TIDYUP: |
f1e894f3 PH |
4261 | process_info[process_info_len] = 0; /* Remove message id */ |
4262 | if (data_file != NULL) (void)fclose(data_file); /* Frees the lock */ | |
059ec3d9 PH |
4263 | |
4264 | /* Now reset signal handlers to their defaults */ | |
4265 | ||
4266 | signal(SIGTERM, SIG_DFL); | |
4267 | signal(SIGINT, SIG_DFL); | |
4268 | ||
4269 | /* Tell an SMTP caller the state of play, and arrange to return the SMTP return | |
4270 | value, which defaults TRUE - meaning there may be more incoming messages from | |
4271 | this connection. For non-SMTP callers (where there is only ever one message), | |
4272 | the default is FALSE. */ | |
4273 | ||
4274 | if (smtp_input) | |
4275 | { | |
4276 | yield = smtp_yield; | |
4277 | ||
4278 | /* Handle interactive SMTP callers. After several kinds of error, smtp_reply | |
58eb016e PH |
4279 | is set to the response that should be sent. When it is NULL, we generate |
4280 | default responses. After an ACL error or local_scan() error, the response has | |
4281 | already been sent, and smtp_reply is an empty string to indicate this. */ | |
059ec3d9 PH |
4282 | |
4283 | if (!smtp_batched_input) | |
4284 | { | |
27b9e5f4 | 4285 | if (!smtp_reply) |
059ec3d9 | 4286 | { |
29aba418 | 4287 | if (fake_response != OK) |
27b9e5f4 JH |
4288 | smtp_respond(fake_response == DEFER ? US"450" : US"550", |
4289 | 3, TRUE, fake_response_text); | |
4e88a19f PH |
4290 | |
4291 | /* An OK response is required; use "message" text if present. */ | |
4292 | ||
27b9e5f4 | 4293 | else if (user_msg) |
4e88a19f PH |
4294 | { |
4295 | uschar *code = US"250"; | |
4296 | int len = 3; | |
4f6ae5c3 | 4297 | smtp_message_code(&code, &len, &user_msg, NULL, TRUE); |
4e88a19f PH |
4298 | smtp_respond(code, len, TRUE, user_msg); |
4299 | } | |
4300 | ||
4301 | /* Default OK response */ | |
4302 | ||
7e3ce68e JH |
4303 | else if (chunking_state > CHUNKING_OFFERED) |
4304 | { | |
925ac8e4 | 4305 | smtp_printf("250- %u byte chunk, total %d\r\n250 OK id=%s\r\n", FALSE, |
7e3ce68e JH |
4306 | chunking_datasize, message_size+message_linecount, message_id); |
4307 | chunking_state = CHUNKING_OFFERED; | |
4308 | } | |
8e669ac1 | 4309 | else |
925ac8e4 | 4310 | smtp_printf("250 OK id=%s\r\n", FALSE, message_id); |
7e3ce68e | 4311 | |
059ec3d9 PH |
4312 | if (host_checking) |
4313 | fprintf(stdout, | |
4314 | "\n**** SMTP testing: that is not a real message id!\n\n"); | |
4315 | } | |
4e88a19f | 4316 | |
58eb016e | 4317 | /* smtp_reply is set non-empty */ |
4e88a19f | 4318 | |
8523533c | 4319 | else if (smtp_reply[0] != 0) |
29aba418 | 4320 | if (fake_response != OK && (smtp_reply[0] == '2')) |
a5bd321b PH |
4321 | smtp_respond((fake_response == DEFER)? US"450" : US"550", 3, TRUE, |
4322 | fake_response_text); | |
8e669ac1 | 4323 | else |
925ac8e4 | 4324 | smtp_printf("%.1024s\r\n", FALSE, smtp_reply); |
e4bdf652 | 4325 | |
817d9f57 JH |
4326 | switch (cutthrough_done) |
4327 | { | |
ff5929e3 JH |
4328 | case ACCEPTED: |
4329 | log_write(0, LOG_MAIN, "Completed");/* Delivery was done */ | |
41313d92 | 4330 | case PERM_REJ: |
ff5929e3 JH |
4331 | /* Delete spool files */ |
4332 | Uunlink(spool_fname(US"input", message_subdir, message_id, US"-D")); | |
4333 | Uunlink(spool_fname(US"input", message_subdir, message_id, US"-H")); | |
4334 | Uunlink(spool_fname(US"msglog", message_subdir, message_id, US"")); | |
ff5929e3 JH |
4335 | break; |
4336 | ||
4337 | case TMP_REJ: | |
4338 | if (cutthrough.defer_pass) | |
4339 | { | |
4340 | Uunlink(spool_fname(US"input", message_subdir, message_id, US"-D")); | |
4341 | Uunlink(spool_fname(US"input", message_subdir, message_id, US"-H")); | |
4342 | Uunlink(spool_fname(US"msglog", message_subdir, message_id, US"")); | |
4343 | } | |
ff5929e3 JH |
4344 | default: |
4345 | break; | |
e4bdf652 | 4346 | } |
57cc2785 JH |
4347 | if (cutthrough_done != NOT_TRIED) |
4348 | { | |
4349 | message_id[0] = 0; /* Prevent a delivery from starting */ | |
4350 | cutthrough.delivery = cutthrough.callout_hold_only = FALSE; | |
4351 | cutthrough.defer_pass = FALSE; | |
4352 | } | |
059ec3d9 PH |
4353 | } |
4354 | ||
4355 | /* For batched SMTP, generate an error message on failure, and do | |
4356 | nothing on success. The function moan_smtp_batch() does not return - | |
4357 | it exits from the program with a non-zero return code. */ | |
4358 | ||
27b9e5f4 JH |
4359 | else if (smtp_reply) |
4360 | moan_smtp_batch(NULL, "%s", smtp_reply); | |
059ec3d9 PH |
4361 | } |
4362 | ||
4363 | ||
4364 | /* If blackholing, we can immediately log this message's sad fate. The data | |
4365 | file has already been unlinked, and the header file was never written to disk. | |
4366 | We must now indicate that nothing was received, to prevent a delivery from | |
4367 | starting. */ | |
4368 | ||
27b9e5f4 | 4369 | if (blackholed_by) |
059ec3d9 | 4370 | { |
55414b25 JH |
4371 | const uschar *detail = local_scan_data |
4372 | ? string_printing(local_scan_data) | |
4373 | : string_sprintf("(%s discarded recipients)", blackholed_by); | |
04f7d5b9 | 4374 | log_write(0, LOG_MAIN, "=> blackhole %s%s", detail, blackhole_log_msg); |
059ec3d9 PH |
4375 | log_write(0, LOG_MAIN, "Completed"); |
4376 | message_id[0] = 0; | |
4377 | } | |
4378 | ||
4379 | /* Reset headers so that logging of rejects for a subsequent message doesn't | |
4380 | include them. It is also important to set header_last = NULL before exiting | |
4381 | from this function, as this prevents certain rewrites that might happen during | |
4382 | subsequent verifying (of another incoming message) from trying to add headers | |
4383 | when they shouldn't. */ | |
4384 | ||
4385 | header_list = header_last = NULL; | |
4386 | ||
4387 | return yield; /* TRUE if more messages (SMTP only) */ | |
4388 | } | |
4389 | ||
4390 | /* End of receive.c */ |