e3165051fe3ee103032027d5f3ee23bb5e72985d
[exim.git] / src / src / deliver.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* See the file NOTICE for conditions of use and distribution. */
7
8 /* The main code for delivering a message. */
9
10
11 #include "exim.h"
12 #include "transports/smtp.h"
13 #include <sys/uio.h>
14 #include <assert.h>
15
16
17 /* Data block for keeping track of subprocesses for parallel remote
18 delivery. */
19
20 typedef struct pardata {
21 address_item *addrlist; /* chain of addresses */
22 address_item *addr; /* next address data expected for */
23 pid_t pid; /* subprocess pid */
24 int fd; /* pipe fd for getting result from subprocess */
25 int transport_count; /* returned transport count value */
26 BOOL done; /* no more data needed */
27 uschar *msg; /* error message */
28 uschar *return_path; /* return_path for these addresses */
29 } pardata;
30
31 /* Values for the process_recipients variable */
32
33 enum { RECIP_ACCEPT, RECIP_IGNORE, RECIP_DEFER,
34 RECIP_FAIL, RECIP_FAIL_FILTER, RECIP_FAIL_TIMEOUT,
35 RECIP_FAIL_LOOP};
36
37 /* Mutually recursive functions for marking addresses done. */
38
39 static void child_done(address_item *, uschar *);
40 static void address_done(address_item *, uschar *);
41
42 /* Table for turning base-62 numbers into binary */
43
44 static uschar tab62[] =
45 {0,1,2,3,4,5,6,7,8,9,0,0,0,0,0,0, /* 0-9 */
46 0,10,11,12,13,14,15,16,17,18,19,20, /* A-K */
47 21,22,23,24,25,26,27,28,29,30,31,32, /* L-W */
48 33,34,35, 0, 0, 0, 0, 0, /* X-Z */
49 0,36,37,38,39,40,41,42,43,44,45,46, /* a-k */
50 47,48,49,50,51,52,53,54,55,56,57,58, /* l-w */
51 59,60,61}; /* x-z */
52
53
54 /*************************************************
55 * Local static variables *
56 *************************************************/
57
58 /* addr_duplicate is global because it needs to be seen from the Envelope-To
59 writing code. */
60
61 static address_item *addr_defer = NULL;
62 static address_item *addr_failed = NULL;
63 static address_item *addr_fallback = NULL;
64 static address_item *addr_local = NULL;
65 static address_item *addr_new = NULL;
66 static address_item *addr_remote = NULL;
67 static address_item *addr_route = NULL;
68 static address_item *addr_succeed = NULL;
69 static address_item *addr_dsntmp = NULL;
70 static address_item *addr_senddsn = NULL;
71
72 static FILE *message_log = NULL;
73 static BOOL update_spool;
74 static BOOL remove_journal;
75 static int parcount = 0;
76 static pardata *parlist = NULL;
77 static int return_count;
78 static uschar *frozen_info = US"";
79 static uschar *used_return_path = NULL;
80
81
82
83 /*************************************************
84 * read as much as requested *
85 *************************************************/
86
87 /* The syscall read(2) doesn't always returns as much as we want. For
88 several reasons it might get less. (Not talking about signals, as syscalls
89 are restartable). When reading from a network or pipe connection the sender
90 might send in smaller chunks, with delays between these chunks. The read(2)
91 may return such a chunk.
92
93 The more the writer writes and the smaller the pipe between write and read is,
94 the more we get the chance of reading leass than requested. (See bug 2130)
95
96 This function read(2)s until we got all the data we *requested*.
97
98 Note: This function may block. Use it only if you're sure about the
99 amount of data you will get.
100
101 Argument:
102 fd the file descriptor to read from
103 buffer pointer to a buffer of size len
104 len the requested(!) amount of bytes
105
106 Returns: the amount of bytes read
107 */
108 static ssize_t
109 readn(int fd, void * buffer, size_t len)
110 {
111 void * next = buffer;
112 void * end = buffer + len;
113
114 while (next < end)
115 {
116 ssize_t got = read(fd, next, end - next);
117
118 /* I'm not sure if there are signals that can interrupt us,
119 for now I assume the worst */
120 if (got == -1 && errno == EINTR) continue;
121 if (got <= 0) return next - buffer;
122 next += got;
123 }
124
125 return len;
126 }
127
128
129 /*************************************************
130 * Make a new address item *
131 *************************************************/
132
133 /* This function gets the store and initializes with default values. The
134 transport_return value defaults to DEFER, so that any unexpected failure to
135 deliver does not wipe out the message. The default unique string is set to a
136 copy of the address, so that its domain can be lowercased.
137
138 Argument:
139 address the RFC822 address string
140 copy force a copy of the address
141
142 Returns: a pointer to an initialized address_item
143 */
144
145 address_item *
146 deliver_make_addr(uschar *address, BOOL copy)
147 {
148 address_item *addr = store_get(sizeof(address_item));
149 *addr = address_defaults;
150 if (copy) address = string_copy(address);
151 addr->address = address;
152 addr->unique = string_copy(address);
153 return addr;
154 }
155
156
157
158
159 /*************************************************
160 * Set expansion values for an address *
161 *************************************************/
162
163 /* Certain expansion variables are valid only when handling an address or
164 address list. This function sets them up or clears the values, according to its
165 argument.
166
167 Arguments:
168 addr the address in question, or NULL to clear values
169 Returns: nothing
170 */
171
172 void
173 deliver_set_expansions(address_item *addr)
174 {
175 if (!addr)
176 {
177 const uschar ***p = address_expansions;
178 while (*p) **p++ = NULL;
179 return;
180 }
181
182 /* Exactly what gets set depends on whether there is one or more addresses, and
183 what they contain. These first ones are always set, taking their values from
184 the first address. */
185
186 if (!addr->host_list)
187 {
188 deliver_host = deliver_host_address = US"";
189 deliver_host_port = 0;
190 }
191 else
192 {
193 deliver_host = addr->host_list->name;
194 deliver_host_address = addr->host_list->address;
195 deliver_host_port = addr->host_list->port;
196 }
197
198 deliver_recipients = addr;
199 deliver_address_data = addr->prop.address_data;
200 deliver_domain_data = addr->prop.domain_data;
201 deliver_localpart_data = addr->prop.localpart_data;
202
203 /* These may be unset for multiple addresses */
204
205 deliver_domain = addr->domain;
206 self_hostname = addr->self_hostname;
207
208 #ifdef EXPERIMENTAL_BRIGHTMAIL
209 bmi_deliver = 1; /* deliver by default */
210 bmi_alt_location = NULL;
211 bmi_base64_verdict = NULL;
212 bmi_base64_tracker_verdict = NULL;
213 #endif
214
215 /* If there's only one address we can set everything. */
216
217 if (!addr->next)
218 {
219 address_item *addr_orig;
220
221 deliver_localpart = addr->local_part;
222 deliver_localpart_prefix = addr->prefix;
223 deliver_localpart_suffix = addr->suffix;
224
225 for (addr_orig = addr; addr_orig->parent; addr_orig = addr_orig->parent) ;
226 deliver_domain_orig = addr_orig->domain;
227
228 /* Re-instate any prefix and suffix in the original local part. In all
229 normal cases, the address will have a router associated with it, and we can
230 choose the caseful or caseless version accordingly. However, when a system
231 filter sets up a pipe, file, or autoreply delivery, no router is involved.
232 In this case, though, there won't be any prefix or suffix to worry about. */
233
234 deliver_localpart_orig = !addr_orig->router
235 ? addr_orig->local_part
236 : addr_orig->router->caseful_local_part
237 ? addr_orig->cc_local_part
238 : addr_orig->lc_local_part;
239
240 /* If there's a parent, make its domain and local part available, and if
241 delivering to a pipe or file, or sending an autoreply, get the local
242 part from the parent. For pipes and files, put the pipe or file string
243 into address_pipe and address_file. */
244
245 if (addr->parent)
246 {
247 deliver_domain_parent = addr->parent->domain;
248 deliver_localpart_parent = !addr->parent->router
249 ? addr->parent->local_part
250 : addr->parent->router->caseful_local_part
251 ? addr->parent->cc_local_part
252 : addr->parent->lc_local_part;
253
254 /* File deliveries have their own flag because they need to be picked out
255 as special more often. */
256
257 if (testflag(addr, af_pfr))
258 {
259 if (testflag(addr, af_file)) address_file = addr->local_part;
260 else if (deliver_localpart[0] == '|') address_pipe = addr->local_part;
261 deliver_localpart = addr->parent->local_part;
262 deliver_localpart_prefix = addr->parent->prefix;
263 deliver_localpart_suffix = addr->parent->suffix;
264 }
265 }
266
267 #ifdef EXPERIMENTAL_BRIGHTMAIL
268 /* Set expansion variables related to Brightmail AntiSpam */
269 bmi_base64_verdict = bmi_get_base64_verdict(deliver_localpart_orig, deliver_domain_orig);
270 bmi_base64_tracker_verdict = bmi_get_base64_tracker_verdict(bmi_base64_verdict);
271 /* get message delivery status (0 - don't deliver | 1 - deliver) */
272 bmi_deliver = bmi_get_delivery_status(bmi_base64_verdict);
273 /* if message is to be delivered, get eventual alternate location */
274 if (bmi_deliver == 1)
275 bmi_alt_location = bmi_get_alt_location(bmi_base64_verdict);
276 #endif
277
278 }
279
280 /* For multiple addresses, don't set local part, and leave the domain and
281 self_hostname set only if it is the same for all of them. It is possible to
282 have multiple pipe and file addresses, but only when all addresses have routed
283 to the same pipe or file. */
284
285 else
286 {
287 address_item *addr2;
288 if (testflag(addr, af_pfr))
289 {
290 if (testflag(addr, af_file)) address_file = addr->local_part;
291 else if (addr->local_part[0] == '|') address_pipe = addr->local_part;
292 }
293 for (addr2 = addr->next; addr2; addr2 = addr2->next)
294 {
295 if (deliver_domain && Ustrcmp(deliver_domain, addr2->domain) != 0)
296 deliver_domain = NULL;
297 if ( self_hostname
298 && ( !addr2->self_hostname
299 || Ustrcmp(self_hostname, addr2->self_hostname) != 0
300 ) )
301 self_hostname = NULL;
302 if (!deliver_domain && !self_hostname) break;
303 }
304 }
305 }
306
307
308
309
310 /*************************************************
311 * Open a msglog file *
312 *************************************************/
313
314 /* This function is used both for normal message logs, and for files in the
315 msglog directory that are used to catch output from pipes. Try to create the
316 directory if it does not exist. From release 4.21, normal message logs should
317 be created when the message is received.
318
319 Called from deliver_message(), can be operating as root.
320
321 Argument:
322 filename the file name
323 mode the mode required
324 error used for saying what failed
325
326 Returns: a file descriptor, or -1 (with errno set)
327 */
328
329 static int
330 open_msglog_file(uschar *filename, int mode, uschar **error)
331 {
332 int fd, i;
333
334 for (i = 2; i > 0; i--)
335 {
336 fd = Uopen(filename,
337 #ifdef O_CLOEXEC
338 O_CLOEXEC |
339 #endif
340 #ifdef O_NOFOLLOW
341 O_NOFOLLOW |
342 #endif
343 O_WRONLY|O_APPEND|O_CREAT, mode);
344 if (fd >= 0)
345 {
346 /* Set the close-on-exec flag and change the owner to the exim uid/gid (this
347 function is called as root). Double check the mode, because the group setting
348 doesn't always get set automatically. */
349
350 #ifndef O_CLOEXEC
351 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
352 #endif
353 if (fchown(fd, exim_uid, exim_gid) < 0)
354 {
355 *error = US"chown";
356 return -1;
357 }
358 if (fchmod(fd, mode) < 0)
359 {
360 *error = US"chmod";
361 return -1;
362 }
363 return fd;
364 }
365 if (errno != ENOENT)
366 break;
367
368 (void)directory_make(spool_directory,
369 spool_sname(US"msglog", message_subdir),
370 MSGLOG_DIRECTORY_MODE, TRUE);
371 }
372
373 *error = US"create";
374 return -1;
375 }
376
377
378
379
380 /*************************************************
381 * Write to msglog if required *
382 *************************************************/
383
384 /* Write to the message log, if configured. This function may also be called
385 from transports.
386
387 Arguments:
388 format a string format
389
390 Returns: nothing
391 */
392
393 void
394 deliver_msglog(const char *format, ...)
395 {
396 va_list ap;
397 if (!message_logs) return;
398 va_start(ap, format);
399 vfprintf(message_log, format, ap);
400 fflush(message_log);
401 va_end(ap);
402 }
403
404
405
406
407 /*************************************************
408 * Replicate status for batch *
409 *************************************************/
410
411 /* When a transport handles a batch of addresses, it may treat them
412 individually, or it may just put the status in the first one, and return FALSE,
413 requesting that the status be copied to all the others externally. This is the
414 replication function. As well as the status, it copies the transport pointer,
415 which may have changed if appendfile passed the addresses on to a different
416 transport.
417
418 Argument: pointer to the first address in a chain
419 Returns: nothing
420 */
421
422 static void
423 replicate_status(address_item *addr)
424 {
425 address_item *addr2;
426 for (addr2 = addr->next; addr2; addr2 = addr2->next)
427 {
428 addr2->transport = addr->transport;
429 addr2->transport_return = addr->transport_return;
430 addr2->basic_errno = addr->basic_errno;
431 addr2->more_errno = addr->more_errno;
432 addr2->delivery_usec = addr->delivery_usec;
433 addr2->special_action = addr->special_action;
434 addr2->message = addr->message;
435 addr2->user_message = addr->user_message;
436 }
437 }
438
439
440
441 /*************************************************
442 * Compare lists of hosts *
443 *************************************************/
444
445 /* This function is given two pointers to chains of host items, and it yields
446 TRUE if the lists refer to the same hosts in the same order, except that
447
448 (1) Multiple hosts with the same non-negative MX values are permitted to appear
449 in different orders. Round-robinning nameservers can cause this to happen.
450
451 (2) Multiple hosts with the same negative MX values less than MX_NONE are also
452 permitted to appear in different orders. This is caused by randomizing
453 hosts lists.
454
455 This enables Exim to use a single SMTP transaction for sending to two entirely
456 different domains that happen to end up pointing at the same hosts.
457
458 Arguments:
459 one points to the first host list
460 two points to the second host list
461
462 Returns: TRUE if the lists refer to the same host set
463 */
464
465 static BOOL
466 same_hosts(host_item *one, host_item *two)
467 {
468 while (one && two)
469 {
470 if (Ustrcmp(one->name, two->name) != 0)
471 {
472 int mx = one->mx;
473 host_item *end_one = one;
474 host_item *end_two = two;
475
476 /* Batch up only if there was no MX and the list was not randomized */
477
478 if (mx == MX_NONE) return FALSE;
479
480 /* Find the ends of the shortest sequence of identical MX values */
481
482 while ( end_one->next && end_one->next->mx == mx
483 && end_two->next && end_two->next->mx == mx)
484 {
485 end_one = end_one->next;
486 end_two = end_two->next;
487 }
488
489 /* If there aren't any duplicates, there's no match. */
490
491 if (end_one == one) return FALSE;
492
493 /* For each host in the 'one' sequence, check that it appears in the 'two'
494 sequence, returning FALSE if not. */
495
496 for (;;)
497 {
498 host_item *hi;
499 for (hi = two; hi != end_two->next; hi = hi->next)
500 if (Ustrcmp(one->name, hi->name) == 0) break;
501 if (hi == end_two->next) return FALSE;
502 if (one == end_one) break;
503 one = one->next;
504 }
505
506 /* All the hosts in the 'one' sequence were found in the 'two' sequence.
507 Ensure both are pointing at the last host, and carry on as for equality. */
508
509 two = end_two;
510 }
511
512 /* if the names matched but ports do not, mismatch */
513 else if (one->port != two->port)
514 return FALSE;
515
516 /* Hosts matched */
517
518 one = one->next;
519 two = two->next;
520 }
521
522 /* True if both are NULL */
523
524 return (one == two);
525 }
526
527
528
529 /*************************************************
530 * Compare header lines *
531 *************************************************/
532
533 /* This function is given two pointers to chains of header items, and it yields
534 TRUE if they are the same header texts in the same order.
535
536 Arguments:
537 one points to the first header list
538 two points to the second header list
539
540 Returns: TRUE if the lists refer to the same header set
541 */
542
543 static BOOL
544 same_headers(header_line *one, header_line *two)
545 {
546 for (;; one = one->next, two = two->next)
547 {
548 if (one == two) return TRUE; /* Includes the case where both NULL */
549 if (!one || !two) return FALSE;
550 if (Ustrcmp(one->text, two->text) != 0) return FALSE;
551 }
552 }
553
554
555
556 /*************************************************
557 * Compare string settings *
558 *************************************************/
559
560 /* This function is given two pointers to strings, and it returns
561 TRUE if they are the same pointer, or if the two strings are the same.
562
563 Arguments:
564 one points to the first string
565 two points to the second string
566
567 Returns: TRUE or FALSE
568 */
569
570 static BOOL
571 same_strings(uschar *one, uschar *two)
572 {
573 if (one == two) return TRUE; /* Includes the case where both NULL */
574 if (!one || !two) return FALSE;
575 return (Ustrcmp(one, two) == 0);
576 }
577
578
579
580 /*************************************************
581 * Compare uid/gid for addresses *
582 *************************************************/
583
584 /* This function is given a transport and two addresses. It yields TRUE if the
585 uid/gid/initgroups settings for the two addresses are going to be the same when
586 they are delivered.
587
588 Arguments:
589 tp the transort
590 addr1 the first address
591 addr2 the second address
592
593 Returns: TRUE or FALSE
594 */
595
596 static BOOL
597 same_ugid(transport_instance *tp, address_item *addr1, address_item *addr2)
598 {
599 if ( !tp->uid_set && !tp->expand_uid
600 && !tp->deliver_as_creator
601 && ( testflag(addr1, af_uid_set) != testflag(addr2, af_gid_set)
602 || ( testflag(addr1, af_uid_set)
603 && ( addr1->uid != addr2->uid
604 || testflag(addr1, af_initgroups) != testflag(addr2, af_initgroups)
605 ) ) ) )
606 return FALSE;
607
608 if ( !tp->gid_set && !tp->expand_gid
609 && ( testflag(addr1, af_gid_set) != testflag(addr2, af_gid_set)
610 || ( testflag(addr1, af_gid_set)
611 && addr1->gid != addr2->gid
612 ) ) )
613 return FALSE;
614
615 return TRUE;
616 }
617
618
619
620
621 /*************************************************
622 * Record that an address is complete *
623 *************************************************/
624
625 /* This function records that an address is complete. This is straightforward
626 for most addresses, where the unique address is just the full address with the
627 domain lower cased. For homonyms (addresses that are the same as one of their
628 ancestors) their are complications. Their unique addresses have \x\ prepended
629 (where x = 0, 1, 2...), so that de-duplication works correctly for siblings and
630 cousins.
631
632 Exim used to record the unique addresses of homonyms as "complete". This,
633 however, fails when the pattern of redirection varies over time (e.g. if taking
634 unseen copies at only some times of day) because the prepended numbers may vary
635 from one delivery run to the next. This problem is solved by never recording
636 prepended unique addresses as complete. Instead, when a homonymic address has
637 actually been delivered via a transport, we record its basic unique address
638 followed by the name of the transport. This is checked in subsequent delivery
639 runs whenever an address is routed to a transport.
640
641 If the completed address is a top-level one (has no parent, which means it
642 cannot be homonymic) we also add the original address to the non-recipients
643 tree, so that it gets recorded in the spool file and therefore appears as
644 "done" in any spool listings. The original address may differ from the unique
645 address in the case of the domain.
646
647 Finally, this function scans the list of duplicates, marks as done any that
648 match this address, and calls child_done() for their ancestors.
649
650 Arguments:
651 addr address item that has been completed
652 now current time as a string
653
654 Returns: nothing
655 */
656
657 static void
658 address_done(address_item *addr, uschar *now)
659 {
660 address_item *dup;
661
662 update_spool = TRUE; /* Ensure spool gets updated */
663
664 /* Top-level address */
665
666 if (!addr->parent)
667 {
668 tree_add_nonrecipient(addr->unique);
669 tree_add_nonrecipient(addr->address);
670 }
671
672 /* Homonymous child address */
673
674 else if (testflag(addr, af_homonym))
675 {
676 if (addr->transport)
677 tree_add_nonrecipient(
678 string_sprintf("%s/%s", addr->unique + 3, addr->transport->name));
679 }
680
681 /* Non-homonymous child address */
682
683 else tree_add_nonrecipient(addr->unique);
684
685 /* Check the list of duplicate addresses and ensure they are now marked
686 done as well. */
687
688 for (dup = addr_duplicate; dup; dup = dup->next)
689 if (Ustrcmp(addr->unique, dup->unique) == 0)
690 {
691 tree_add_nonrecipient(dup->unique);
692 child_done(dup, now);
693 }
694 }
695
696
697
698
699 /*************************************************
700 * Decrease counts in parents and mark done *
701 *************************************************/
702
703 /* This function is called when an address is complete. If there is a parent
704 address, its count of children is decremented. If there are still other
705 children outstanding, the function exits. Otherwise, if the count has become
706 zero, address_done() is called to mark the parent and its duplicates complete.
707 Then loop for any earlier ancestors.
708
709 Arguments:
710 addr points to the completed address item
711 now the current time as a string, for writing to the message log
712
713 Returns: nothing
714 */
715
716 static void
717 child_done(address_item *addr, uschar *now)
718 {
719 address_item *aa;
720 while (addr->parent)
721 {
722 addr = addr->parent;
723 if (--addr->child_count > 0) return; /* Incomplete parent */
724 address_done(addr, now);
725
726 /* Log the completion of all descendents only when there is no ancestor with
727 the same original address. */
728
729 for (aa = addr->parent; aa; aa = aa->parent)
730 if (Ustrcmp(aa->address, addr->address) == 0) break;
731 if (aa) continue;
732
733 deliver_msglog("%s %s: children all complete\n", now, addr->address);
734 DEBUG(D_deliver) debug_printf("%s: children all complete\n", addr->address);
735 }
736 }
737
738
739
740 /*************************************************
741 * Delivery logging support functions *
742 *************************************************/
743
744 /* The LOGGING() checks in d_log_interface() are complicated for backwards
745 compatibility. When outgoing interface logging was originally added, it was
746 conditional on just incoming_interface (which is off by default). The
747 outgoing_interface option is on by default to preserve this behaviour, but
748 you can enable incoming_interface and disable outgoing_interface to get I=
749 fields on incoming lines only.
750
751 Arguments:
752 g The log line
753 addr The address to be logged
754
755 Returns: New value for s
756 */
757
758 static gstring *
759 d_log_interface(gstring * g)
760 {
761 if (LOGGING(incoming_interface) && LOGGING(outgoing_interface)
762 && sending_ip_address)
763 {
764 g = string_append(g, 2, US" I=[", sending_ip_address);
765 g = LOGGING(outgoing_port)
766 ? string_append(g, 2, US"]:", string_sprintf("%d", sending_port))
767 : string_catn(g, US"]", 1);
768 }
769 return g;
770 }
771
772
773
774 static gstring *
775 d_hostlog(gstring * g, address_item * addr)
776 {
777 host_item * h = addr->host_used;
778
779 g = string_append(g, 2, US" H=", h->name);
780
781 if (LOGGING(dnssec) && h->dnssec == DS_YES)
782 g = string_catn(g, US" DS", 3);
783
784 g = string_append(g, 3, US" [", h->address, US"]");
785
786 if (LOGGING(outgoing_port))
787 g = string_append(g, 2, US":", string_sprintf("%d", h->port));
788
789 #ifdef SUPPORT_SOCKS
790 if (LOGGING(proxy) && proxy_local_address)
791 {
792 g = string_append(g, 3, US" PRX=[", proxy_local_address, US"]");
793 if (LOGGING(outgoing_port))
794 g = string_append(g, 2, US":", string_sprintf("%d", proxy_local_port));
795 }
796 #endif
797
798 g = d_log_interface(g);
799
800 if (testflag(addr, af_tcp_fastopen))
801 g = string_catn(g, US" TFO", 4);
802
803 return g;
804 }
805
806
807
808
809
810 #ifdef SUPPORT_TLS
811 static gstring *
812 d_tlslog(gstring * s, address_item * addr)
813 {
814 if (LOGGING(tls_cipher) && addr->cipher)
815 s = string_append(s, 2, US" X=", addr->cipher);
816 if (LOGGING(tls_certificate_verified) && addr->cipher)
817 s = string_append(s, 2, US" CV=",
818 testflag(addr, af_cert_verified)
819 ?
820 #ifdef SUPPORT_DANE
821 testflag(addr, af_dane_verified)
822 ? "dane"
823 :
824 #endif
825 "yes"
826 : "no");
827 if (LOGGING(tls_peerdn) && addr->peerdn)
828 s = string_append(s, 3, US" DN=\"", string_printing(addr->peerdn), US"\"");
829 return s;
830 }
831 #endif
832
833
834
835
836 #ifndef DISABLE_EVENT
837 uschar *
838 event_raise(uschar * action, const uschar * event, uschar * ev_data)
839 {
840 uschar * s;
841 if (action)
842 {
843 DEBUG(D_deliver)
844 debug_printf("Event(%s): event_action=|%s| delivery_IP=%s\n",
845 event,
846 action, deliver_host_address);
847
848 event_name = event;
849 event_data = ev_data;
850
851 if (!(s = expand_string(action)) && *expand_string_message)
852 log_write(0, LOG_MAIN|LOG_PANIC,
853 "failed to expand event_action %s in %s: %s\n",
854 event, transport_name, expand_string_message);
855
856 event_name = event_data = NULL;
857
858 /* If the expansion returns anything but an empty string, flag for
859 the caller to modify his normal processing
860 */
861 if (s && *s)
862 {
863 DEBUG(D_deliver)
864 debug_printf("Event(%s): event_action returned \"%s\"\n", event, s);
865 return s;
866 }
867 }
868 return NULL;
869 }
870
871 void
872 msg_event_raise(const uschar * event, const address_item * addr)
873 {
874 const uschar * save_domain = deliver_domain;
875 uschar * save_local = deliver_localpart;
876 const uschar * save_host = deliver_host;
877 const uschar * save_address = deliver_host_address;
878 const int save_port = deliver_host_port;
879
880 if (!addr->transport)
881 return;
882
883 router_name = addr->router ? addr->router->name : NULL;
884 transport_name = addr->transport->name;
885 deliver_domain = addr->domain;
886 deliver_localpart = addr->local_part;
887 deliver_host = addr->host_used ? addr->host_used->name : NULL;
888
889 (void) event_raise(addr->transport->event_action, event,
890 addr->host_used
891 || Ustrcmp(addr->transport->driver_name, "smtp") == 0
892 || Ustrcmp(addr->transport->driver_name, "lmtp") == 0
893 ? addr->message : NULL);
894
895 deliver_host_port = save_port;
896 deliver_host_address = save_address;
897 deliver_host = save_host;
898 deliver_localpart = save_local;
899 deliver_domain = save_domain;
900 router_name = transport_name = NULL;
901 }
902 #endif /*DISABLE_EVENT*/
903
904
905
906 /******************************************************************************/
907
908
909 /*************************************************
910 * Generate local prt for logging *
911 *************************************************/
912
913 /* This function is a subroutine for use in string_log_address() below.
914
915 Arguments:
916 addr the address being logged
917 yield the current dynamic buffer pointer
918
919 Returns: the new value of the buffer pointer
920 */
921
922 static gstring *
923 string_get_localpart(address_item * addr, gstring * yield)
924 {
925 uschar * s;
926
927 s = addr->prefix;
928 if (testflag(addr, af_include_affixes) && s)
929 {
930 #ifdef SUPPORT_I18N
931 if (testflag(addr, af_utf8_downcvt))
932 s = string_localpart_utf8_to_alabel(s, NULL);
933 #endif
934 yield = string_cat(yield, s);
935 }
936
937 s = addr->local_part;
938 #ifdef SUPPORT_I18N
939 if (testflag(addr, af_utf8_downcvt))
940 s = string_localpart_utf8_to_alabel(s, NULL);
941 #endif
942 yield = string_cat(yield, s);
943
944 s = addr->suffix;
945 if (testflag(addr, af_include_affixes) && s)
946 {
947 #ifdef SUPPORT_I18N
948 if (testflag(addr, af_utf8_downcvt))
949 s = string_localpart_utf8_to_alabel(s, NULL);
950 #endif
951 yield = string_cat(yield, s);
952 }
953
954 return yield;
955 }
956
957
958 /*************************************************
959 * Generate log address list *
960 *************************************************/
961
962 /* This function generates a list consisting of an address and its parents, for
963 use in logging lines. For saved onetime aliased addresses, the onetime parent
964 field is used. If the address was delivered by a transport with rcpt_include_
965 affixes set, the af_include_affixes bit will be set in the address. In that
966 case, we include the affixes here too.
967
968 Arguments:
969 g points to growing-string struct
970 addr bottom (ultimate) address
971 all_parents if TRUE, include all parents
972 success TRUE for successful delivery
973
974 Returns: a growable string in dynamic store
975 */
976
977 static gstring *
978 string_log_address(gstring * g,
979 address_item *addr, BOOL all_parents, BOOL success)
980 {
981 BOOL add_topaddr = TRUE;
982 address_item *topaddr;
983
984 /* Find the ultimate parent */
985
986 for (topaddr = addr; topaddr->parent; topaddr = topaddr->parent) ;
987
988 /* We start with just the local part for pipe, file, and reply deliveries, and
989 for successful local deliveries from routers that have the log_as_local flag
990 set. File deliveries from filters can be specified as non-absolute paths in
991 cases where the transport is going to complete the path. If there is an error
992 before this happens (expansion failure) the local part will not be updated, and
993 so won't necessarily look like a path. Add extra text for this case. */
994
995 if ( testflag(addr, af_pfr)
996 || ( success
997 && addr->router && addr->router->log_as_local
998 && addr->transport && addr->transport->info->local
999 ) )
1000 {
1001 if (testflag(addr, af_file) && addr->local_part[0] != '/')
1002 g = string_catn(g, CUS"save ", 5);
1003 g = string_get_localpart(addr, g);
1004 }
1005
1006 /* Other deliveries start with the full address. It we have split it into local
1007 part and domain, use those fields. Some early failures can happen before the
1008 splitting is done; in those cases use the original field. */
1009
1010 else
1011 {
1012 uschar * cmp = g->s + g->ptr;
1013
1014 if (addr->local_part)
1015 {
1016 const uschar * s;
1017 g = string_get_localpart(addr, g);
1018 g = string_catn(g, US"@", 1);
1019 s = addr->domain;
1020 #ifdef SUPPORT_I18N
1021 if (testflag(addr, af_utf8_downcvt))
1022 s = string_localpart_utf8_to_alabel(s, NULL);
1023 #endif
1024 g = string_cat(g, s);
1025 }
1026 else
1027 g = string_cat(g, addr->address);
1028
1029 /* If the address we are going to print is the same as the top address,
1030 and all parents are not being included, don't add on the top address. First
1031 of all, do a caseless comparison; if this succeeds, do a caseful comparison
1032 on the local parts. */
1033
1034 string_from_gstring(g); /* ensure nul-terminated */
1035 if ( strcmpic(cmp, topaddr->address) == 0
1036 && Ustrncmp(cmp, topaddr->address, Ustrchr(cmp, '@') - cmp) == 0
1037 && !addr->onetime_parent
1038 && (!all_parents || !addr->parent || addr->parent == topaddr)
1039 )
1040 add_topaddr = FALSE;
1041 }
1042
1043 /* If all parents are requested, or this is a local pipe/file/reply, and
1044 there is at least one intermediate parent, show it in brackets, and continue
1045 with all of them if all are wanted. */
1046
1047 if ( (all_parents || testflag(addr, af_pfr))
1048 && addr->parent
1049 && addr->parent != topaddr)
1050 {
1051 uschar *s = US" (";
1052 address_item *addr2;
1053 for (addr2 = addr->parent; addr2 != topaddr; addr2 = addr2->parent)
1054 {
1055 g = string_catn(g, s, 2);
1056 g = string_cat (g, addr2->address);
1057 if (!all_parents) break;
1058 s = US", ";
1059 }
1060 g = string_catn(g, US")", 1);
1061 }
1062
1063 /* Add the top address if it is required */
1064
1065 if (add_topaddr)
1066 g = string_append(g, 3,
1067 US" <",
1068 addr->onetime_parent ? addr->onetime_parent : topaddr->address,
1069 US">");
1070
1071 return g;
1072 }
1073
1074
1075
1076 void
1077 timesince(struct timeval * diff, struct timeval * then)
1078 {
1079 gettimeofday(diff, NULL);
1080 diff->tv_sec -= then->tv_sec;
1081 if ((diff->tv_usec -= then->tv_usec) < 0)
1082 {
1083 diff->tv_sec--;
1084 diff->tv_usec += 1000*1000;
1085 }
1086 }
1087
1088
1089
1090 uschar *
1091 string_timediff(struct timeval * diff)
1092 {
1093 static uschar buf[sizeof("0.000s")];
1094
1095 if (diff->tv_sec >= 5 || !LOGGING(millisec))
1096 return readconf_printtime((int)diff->tv_sec);
1097
1098 sprintf(CS buf, "%d.%03ds", (int)diff->tv_sec, (int)diff->tv_usec/1000);
1099 return buf;
1100 }
1101
1102
1103 uschar *
1104 string_timesince(struct timeval * then)
1105 {
1106 struct timeval diff;
1107
1108 timesince(&diff, then);
1109 return string_timediff(&diff);
1110 }
1111
1112 /******************************************************************************/
1113
1114
1115
1116 /* If msg is NULL this is a delivery log and logchar is used. Otherwise
1117 this is a nonstandard call; no two-character delivery flag is written
1118 but sender-host and sender are prefixed and "msg" is inserted in the log line.
1119
1120 Arguments:
1121 flags passed to log_write()
1122 */
1123 void
1124 delivery_log(int flags, address_item * addr, int logchar, uschar * msg)
1125 {
1126 gstring * g; /* Used for a temporary, expanding buffer, for building log lines */
1127 void * reset_point; /* released afterwards. */
1128
1129 /* Log the delivery on the main log. We use an extensible string to build up
1130 the log line, and reset the store afterwards. Remote deliveries should always
1131 have a pointer to the host item that succeeded; local deliveries can have a
1132 pointer to a single host item in their host list, for use by the transport. */
1133
1134 #ifndef DISABLE_EVENT
1135 /* presume no successful remote delivery */
1136 lookup_dnssec_authenticated = NULL;
1137 #endif
1138
1139 g = reset_point = string_get(256);
1140
1141 if (msg)
1142 g = string_append(g, 2, host_and_ident(TRUE), US" ");
1143 else
1144 {
1145 g->s[0] = logchar; g->ptr = 1;
1146 g = string_catn(g, US"> ", 2);
1147 }
1148 g = string_log_address(g, addr, LOGGING(all_parents), TRUE);
1149
1150 if (LOGGING(sender_on_delivery) || msg)
1151 g = string_append(g, 3, US" F=<",
1152 #ifdef SUPPORT_I18N
1153 testflag(addr, af_utf8_downcvt)
1154 ? string_address_utf8_to_alabel(sender_address, NULL)
1155 :
1156 #endif
1157 sender_address,
1158 US">");
1159
1160 if (*queue_name)
1161 g = string_append(g, 2, US" Q=", queue_name);
1162
1163 #ifdef EXPERIMENTAL_SRS
1164 if(addr->prop.srs_sender)
1165 g = string_append(g, 3, US" SRS=<", addr->prop.srs_sender, US">");
1166 #endif
1167
1168 /* You might think that the return path must always be set for a successful
1169 delivery; indeed, I did for some time, until this statement crashed. The case
1170 when it is not set is for a delivery to /dev/null which is optimised by not
1171 being run at all. */
1172
1173 if (used_return_path && LOGGING(return_path_on_delivery))
1174 g = string_append(g, 3, US" P=<", used_return_path, US">");
1175
1176 if (msg)
1177 g = string_append(g, 2, US" ", msg);
1178
1179 /* For a delivery from a system filter, there may not be a router */
1180 if (addr->router)
1181 g = string_append(g, 2, US" R=", addr->router->name);
1182
1183 g = string_append(g, 2, US" T=", addr->transport->name);
1184
1185 if (LOGGING(delivery_size))
1186 g = string_append(g, 2, US" S=",
1187 string_sprintf("%d", transport_count));
1188
1189 /* Local delivery */
1190
1191 if (addr->transport->info->local)
1192 {
1193 if (addr->host_list)
1194 g = string_append(g, 2, US" H=", addr->host_list->name);
1195 g = d_log_interface(g);
1196 if (addr->shadow_message)
1197 g = string_cat(g, addr->shadow_message);
1198 }
1199
1200 /* Remote delivery */
1201
1202 else
1203 {
1204 if (addr->host_used)
1205 {
1206 g = d_hostlog(g, addr);
1207 if (continue_sequence > 1)
1208 g = string_catn(g, US"*", 1);
1209
1210 #ifndef DISABLE_EVENT
1211 deliver_host_address = addr->host_used->address;
1212 deliver_host_port = addr->host_used->port;
1213 deliver_host = addr->host_used->name;
1214
1215 /* DNS lookup status */
1216 lookup_dnssec_authenticated = addr->host_used->dnssec==DS_YES ? US"yes"
1217 : addr->host_used->dnssec==DS_NO ? US"no"
1218 : NULL;
1219 #endif
1220 }
1221
1222 #ifdef SUPPORT_TLS
1223 g = d_tlslog(g, addr);
1224 #endif
1225
1226 if (addr->authenticator)
1227 {
1228 g = string_append(g, 2, US" A=", addr->authenticator);
1229 if (addr->auth_id)
1230 {
1231 g = string_append(g, 2, US":", addr->auth_id);
1232 if (LOGGING(smtp_mailauth) && addr->auth_sndr)
1233 g = string_append(g, 2, US":", addr->auth_sndr);
1234 }
1235 }
1236
1237 if (LOGGING(pipelining) && testflag(addr, af_pipelining))
1238 g = string_catn(g, US" L", 2);
1239
1240 #ifndef DISABLE_PRDR
1241 if (testflag(addr, af_prdr_used))
1242 g = string_catn(g, US" PRDR", 5);
1243 #endif
1244
1245 if (testflag(addr, af_chunking_used))
1246 g = string_catn(g, US" K", 2);
1247 }
1248
1249 /* confirmation message (SMTP (host_used) and LMTP (driver_name)) */
1250
1251 if ( LOGGING(smtp_confirmation)
1252 && addr->message
1253 && (addr->host_used || Ustrcmp(addr->transport->driver_name, "lmtp") == 0)
1254 )
1255 {
1256 unsigned i;
1257 unsigned lim = big_buffer_size < 1024 ? big_buffer_size : 1024;
1258 uschar *p = big_buffer;
1259 uschar *ss = addr->message;
1260 *p++ = '\"';
1261 for (i = 0; i < lim && ss[i] != 0; i++) /* limit logged amount */
1262 {
1263 if (ss[i] == '\"' || ss[i] == '\\') *p++ = '\\'; /* quote \ and " */
1264 *p++ = ss[i];
1265 }
1266 *p++ = '\"';
1267 *p = 0;
1268 g = string_append(g, 2, US" C=", big_buffer);
1269 }
1270
1271 /* Time on queue and actual time taken to deliver */
1272
1273 if (LOGGING(queue_time))
1274 g = string_append(g, 2, US" QT=",
1275 string_timesince(&received_time));
1276
1277 if (LOGGING(deliver_time))
1278 {
1279 struct timeval diff = {.tv_sec = addr->more_errno, .tv_usec = addr->delivery_usec};
1280 g = string_append(g, 2, US" DT=", string_timediff(&diff));
1281 }
1282
1283 /* string_cat() always leaves room for the terminator. Release the
1284 store we used to build the line after writing it. */
1285
1286 log_write(0, flags, "%s", string_from_gstring(g));
1287
1288 #ifndef DISABLE_EVENT
1289 if (!msg) msg_event_raise(US"msg:delivery", addr);
1290 #endif
1291
1292 store_reset(reset_point);
1293 return;
1294 }
1295
1296
1297
1298 static void
1299 deferral_log(address_item * addr, uschar * now,
1300 int logflags, uschar * driver_name, uschar * driver_kind)
1301 {
1302 gstring * g;
1303 void * reset_point;
1304
1305 /* Build up the line that is used for both the message log and the main
1306 log. */
1307
1308 g = reset_point = string_get(256);
1309
1310 /* Create the address string for logging. Must not do this earlier, because
1311 an OK result may be changed to FAIL when a pipe returns text. */
1312
1313 g = string_log_address(g, addr, LOGGING(all_parents), FALSE);
1314
1315 if (*queue_name)
1316 g = string_append(g, 2, US" Q=", queue_name);
1317
1318 /* Either driver_name contains something and driver_kind contains
1319 " router" or " transport" (note the leading space), or driver_name is
1320 a null string and driver_kind contains "routing" without the leading
1321 space, if all routing has been deferred. When a domain has been held,
1322 so nothing has been done at all, both variables contain null strings. */
1323
1324 if (driver_name)
1325 {
1326 if (driver_kind[1] == 't' && addr->router)
1327 g = string_append(g, 2, US" R=", addr->router->name);
1328 g = string_cat(g, string_sprintf(" %c=%s", toupper(driver_kind[1]), driver_name));
1329 }
1330 else if (driver_kind)
1331 g = string_append(g, 2, US" ", driver_kind);
1332
1333 /*XXX need an s+s+p sprintf */
1334 g = string_cat(g, string_sprintf(" defer (%d)", addr->basic_errno));
1335
1336 if (addr->basic_errno > 0)
1337 g = string_append(g, 2, US": ",
1338 US strerror(addr->basic_errno));
1339
1340 if (addr->host_used)
1341 {
1342 g = string_append(g, 5,
1343 US" H=", addr->host_used->name,
1344 US" [", addr->host_used->address, US"]");
1345 if (LOGGING(outgoing_port))
1346 {
1347 int port = addr->host_used->port;
1348 g = string_append(g, 2,
1349 US":", port == PORT_NONE ? US"25" : string_sprintf("%d", port));
1350 }
1351 }
1352
1353 if (addr->message)
1354 g = string_append(g, 2, US": ", addr->message);
1355
1356 (void) string_from_gstring(g);
1357
1358 /* Log the deferment in the message log, but don't clutter it
1359 up with retry-time defers after the first delivery attempt. */
1360
1361 if (f.deliver_firsttime || addr->basic_errno > ERRNO_RETRY_BASE)
1362 deliver_msglog("%s %s\n", now, g->s);
1363
1364 /* Write the main log and reset the store.
1365 For errors of the type "retry time not reached" (also remotes skipped
1366 on queue run), logging is controlled by L_retry_defer. Note that this kind
1367 of error number is negative, and all the retry ones are less than any
1368 others. */
1369
1370
1371 log_write(addr->basic_errno <= ERRNO_RETRY_BASE ? L_retry_defer : 0, logflags,
1372 "== %s", g->s);
1373
1374 store_reset(reset_point);
1375 return;
1376 }
1377
1378
1379
1380 static void
1381 failure_log(address_item * addr, uschar * driver_kind, uschar * now)
1382 {
1383 void * reset_point;
1384 gstring * g = reset_point = string_get(256);
1385
1386 /* Build up the log line for the message and main logs */
1387
1388 /* Create the address string for logging. Must not do this earlier, because
1389 an OK result may be changed to FAIL when a pipe returns text. */
1390
1391 g = string_log_address(g, addr, LOGGING(all_parents), FALSE);
1392
1393 if (LOGGING(sender_on_delivery))
1394 g = string_append(g, 3, US" F=<", sender_address, US">");
1395
1396 if (*queue_name)
1397 g = string_append(g, 2, US" Q=", queue_name);
1398
1399 /* Return path may not be set if no delivery actually happened */
1400
1401 if (used_return_path && LOGGING(return_path_on_delivery))
1402 g = string_append(g, 3, US" P=<", used_return_path, US">");
1403
1404 if (addr->router)
1405 g = string_append(g, 2, US" R=", addr->router->name);
1406 if (addr->transport)
1407 g = string_append(g, 2, US" T=", addr->transport->name);
1408
1409 if (addr->host_used)
1410 g = d_hostlog(g, addr);
1411
1412 #ifdef SUPPORT_TLS
1413 g = d_tlslog(g, addr);
1414 #endif
1415
1416 if (addr->basic_errno > 0)
1417 g = string_append(g, 2, US": ", US strerror(addr->basic_errno));
1418
1419 if (addr->message)
1420 g = string_append(g, 2, US": ", addr->message);
1421
1422 (void) string_from_gstring(g);
1423
1424 /* Do the logging. For the message log, "routing failed" for those cases,
1425 just to make it clearer. */
1426
1427 if (driver_kind)
1428 deliver_msglog("%s %s failed for %s\n", now, driver_kind, g->s);
1429 else
1430 deliver_msglog("%s %s\n", now, g->s);
1431
1432 log_write(0, LOG_MAIN, "** %s", g->s);
1433
1434 #ifndef DISABLE_EVENT
1435 msg_event_raise(US"msg:fail:delivery", addr);
1436 #endif
1437
1438 store_reset(reset_point);
1439 return;
1440 }
1441
1442
1443
1444 /*************************************************
1445 * Actions at the end of handling an address *
1446 *************************************************/
1447
1448 /* This is a function for processing a single address when all that can be done
1449 with it has been done.
1450
1451 Arguments:
1452 addr points to the address block
1453 result the result of the delivery attempt
1454 logflags flags for log_write() (LOG_MAIN and/or LOG_PANIC)
1455 driver_type indicates which type of driver (transport, or router) was last
1456 to process the address
1457 logchar '=' or '-' for use when logging deliveries with => or ->
1458
1459 Returns: nothing
1460 */
1461
1462 static void
1463 post_process_one(address_item *addr, int result, int logflags, int driver_type,
1464 int logchar)
1465 {
1466 uschar *now = tod_stamp(tod_log);
1467 uschar *driver_kind = NULL;
1468 uschar *driver_name = NULL;
1469
1470 DEBUG(D_deliver) debug_printf("post-process %s (%d)\n", addr->address, result);
1471
1472 /* Set up driver kind and name for logging. Disable logging if the router or
1473 transport has disabled it. */
1474
1475 if (driver_type == EXIM_DTYPE_TRANSPORT)
1476 {
1477 if (addr->transport)
1478 {
1479 driver_name = addr->transport->name;
1480 driver_kind = US" transport";
1481 f.disable_logging = addr->transport->disable_logging;
1482 }
1483 else driver_kind = US"transporting";
1484 }
1485 else if (driver_type == EXIM_DTYPE_ROUTER)
1486 {
1487 if (addr->router)
1488 {
1489 driver_name = addr->router->name;
1490 driver_kind = US" router";
1491 f.disable_logging = addr->router->disable_logging;
1492 }
1493 else driver_kind = US"routing";
1494 }
1495
1496 /* If there's an error message set, ensure that it contains only printing
1497 characters - it should, but occasionally things slip in and this at least
1498 stops the log format from getting wrecked. We also scan the message for an LDAP
1499 expansion item that has a password setting, and flatten the password. This is a
1500 fudge, but I don't know a cleaner way of doing this. (If the item is badly
1501 malformed, it won't ever have gone near LDAP.) */
1502
1503 if (addr->message)
1504 {
1505 const uschar * s = string_printing(addr->message);
1506
1507 /* deconst cast ok as string_printing known to have alloc'n'copied */
1508 addr->message = expand_hide_passwords(US s);
1509 }
1510
1511 /* If we used a transport that has one of the "return_output" options set, and
1512 if it did in fact generate some output, then for return_output we treat the
1513 message as failed if it was not already set that way, so that the output gets
1514 returned to the sender, provided there is a sender to send it to. For
1515 return_fail_output, do this only if the delivery failed. Otherwise we just
1516 unlink the file, and remove the name so that if the delivery failed, we don't
1517 try to send back an empty or unwanted file. The log_output options operate only
1518 on a non-empty file.
1519
1520 In any case, we close the message file, because we cannot afford to leave a
1521 file-descriptor for one address while processing (maybe very many) others. */
1522
1523 if (addr->return_file >= 0 && addr->return_filename)
1524 {
1525 BOOL return_output = FALSE;
1526 struct stat statbuf;
1527 (void)EXIMfsync(addr->return_file);
1528
1529 /* If there is no output, do nothing. */
1530
1531 if (fstat(addr->return_file, &statbuf) == 0 && statbuf.st_size > 0)
1532 {
1533 transport_instance *tb = addr->transport;
1534
1535 /* Handle logging options */
1536
1537 if ( tb->log_output
1538 || result == FAIL && tb->log_fail_output
1539 || result == DEFER && tb->log_defer_output
1540 )
1541 {
1542 uschar *s;
1543 FILE *f = Ufopen(addr->return_filename, "rb");
1544 if (!f)
1545 log_write(0, LOG_MAIN|LOG_PANIC, "failed to open %s to log output "
1546 "from %s transport: %s", addr->return_filename, tb->name,
1547 strerror(errno));
1548 else
1549 if ((s = US Ufgets(big_buffer, big_buffer_size, f)))
1550 {
1551 uschar *p = big_buffer + Ustrlen(big_buffer);
1552 const uschar * sp;
1553 while (p > big_buffer && isspace(p[-1])) p--;
1554 *p = 0;
1555 sp = string_printing(big_buffer);
1556 log_write(0, LOG_MAIN, "<%s>: %s transport output: %s",
1557 addr->address, tb->name, sp);
1558 }
1559 (void)fclose(f);
1560 }
1561
1562 /* Handle returning options, but only if there is an address to return
1563 the text to. */
1564
1565 if (sender_address[0] != 0 || addr->prop.errors_address)
1566 if (tb->return_output)
1567 {
1568 addr->transport_return = result = FAIL;
1569 if (addr->basic_errno == 0 && !addr->message)
1570 addr->message = US"return message generated";
1571 return_output = TRUE;
1572 }
1573 else
1574 if (tb->return_fail_output && result == FAIL) return_output = TRUE;
1575 }
1576
1577 /* Get rid of the file unless it might be returned, but close it in
1578 all cases. */
1579
1580 if (!return_output)
1581 {
1582 Uunlink(addr->return_filename);
1583 addr->return_filename = NULL;
1584 addr->return_file = -1;
1585 }
1586
1587 (void)close(addr->return_file);
1588 }
1589
1590 /* The success case happens only after delivery by a transport. */
1591
1592 if (result == OK)
1593 {
1594 addr->next = addr_succeed;
1595 addr_succeed = addr;
1596
1597 /* Call address_done() to ensure that we don't deliver to this address again,
1598 and write appropriate things to the message log. If it is a child address, we
1599 call child_done() to scan the ancestors and mark them complete if this is the
1600 last child to complete. */
1601
1602 address_done(addr, now);
1603 DEBUG(D_deliver) debug_printf("%s delivered\n", addr->address);
1604
1605 if (!addr->parent)
1606 deliver_msglog("%s %s: %s%s succeeded\n", now, addr->address,
1607 driver_name, driver_kind);
1608 else
1609 {
1610 deliver_msglog("%s %s <%s>: %s%s succeeded\n", now, addr->address,
1611 addr->parent->address, driver_name, driver_kind);
1612 child_done(addr, now);
1613 }
1614
1615 /* Certificates for logging (via events) */
1616 #ifdef SUPPORT_TLS
1617 tls_out.ourcert = addr->ourcert;
1618 addr->ourcert = NULL;
1619 tls_out.peercert = addr->peercert;
1620 addr->peercert = NULL;
1621
1622 tls_out.cipher = addr->cipher;
1623 tls_out.peerdn = addr->peerdn;
1624 tls_out.ocsp = addr->ocsp;
1625 # ifdef SUPPORT_DANE
1626 tls_out.dane_verified = testflag(addr, af_dane_verified);
1627 # endif
1628 #endif
1629
1630 delivery_log(LOG_MAIN, addr, logchar, NULL);
1631
1632 #ifdef SUPPORT_TLS
1633 tls_free_cert(&tls_out.ourcert);
1634 tls_free_cert(&tls_out.peercert);
1635 tls_out.cipher = NULL;
1636 tls_out.peerdn = NULL;
1637 tls_out.ocsp = OCSP_NOT_REQ;
1638 # ifdef SUPPORT_DANE
1639 tls_out.dane_verified = FALSE;
1640 # endif
1641 #endif
1642 }
1643
1644
1645 /* Soft failure, or local delivery process failed; freezing may be
1646 requested. */
1647
1648 else if (result == DEFER || result == PANIC)
1649 {
1650 if (result == PANIC) logflags |= LOG_PANIC;
1651
1652 /* This puts them on the chain in reverse order. Do not change this, because
1653 the code for handling retries assumes that the one with the retry
1654 information is last. */
1655
1656 addr->next = addr_defer;
1657 addr_defer = addr;
1658
1659 /* The only currently implemented special action is to freeze the
1660 message. Logging of this is done later, just before the -H file is
1661 updated. */
1662
1663 if (addr->special_action == SPECIAL_FREEZE)
1664 {
1665 f.deliver_freeze = TRUE;
1666 deliver_frozen_at = time(NULL);
1667 update_spool = TRUE;
1668 }
1669
1670 /* If doing a 2-stage queue run, we skip writing to either the message
1671 log or the main log for SMTP defers. */
1672
1673 if (!f.queue_2stage || addr->basic_errno != 0)
1674 deferral_log(addr, now, logflags, driver_name, driver_kind);
1675 }
1676
1677
1678 /* Hard failure. If there is an address to which an error message can be sent,
1679 put this address on the failed list. If not, put it on the deferred list and
1680 freeze the mail message for human attention. The latter action can also be
1681 explicitly requested by a router or transport. */
1682
1683 else
1684 {
1685 /* If this is a delivery error, or a message for which no replies are
1686 wanted, and the message's age is greater than ignore_bounce_errors_after,
1687 force the af_ignore_error flag. This will cause the address to be discarded
1688 later (with a log entry). */
1689
1690 if (!*sender_address && message_age >= ignore_bounce_errors_after)
1691 addr->prop.ignore_error = TRUE;
1692
1693 /* Freeze the message if requested, or if this is a bounce message (or other
1694 message with null sender) and this address does not have its own errors
1695 address. However, don't freeze if errors are being ignored. The actual code
1696 to ignore occurs later, instead of sending a message. Logging of freezing
1697 occurs later, just before writing the -H file. */
1698
1699 if ( !addr->prop.ignore_error
1700 && ( addr->special_action == SPECIAL_FREEZE
1701 || (sender_address[0] == 0 && !addr->prop.errors_address)
1702 ) )
1703 {
1704 frozen_info = addr->special_action == SPECIAL_FREEZE
1705 ? US""
1706 : f.sender_local && !f.local_error_message
1707 ? US" (message created with -f <>)"
1708 : US" (delivery error message)";
1709 f.deliver_freeze = TRUE;
1710 deliver_frozen_at = time(NULL);
1711 update_spool = TRUE;
1712
1713 /* The address is put on the defer rather than the failed queue, because
1714 the message is being retained. */
1715
1716 addr->next = addr_defer;
1717 addr_defer = addr;
1718 }
1719
1720 /* Don't put the address on the nonrecipients tree yet; wait until an
1721 error message has been successfully sent. */
1722
1723 else
1724 {
1725 addr->next = addr_failed;
1726 addr_failed = addr;
1727 }
1728
1729 failure_log(addr, driver_name ? NULL : driver_kind, now);
1730 }
1731
1732 /* Ensure logging is turned on again in all cases */
1733
1734 f.disable_logging = FALSE;
1735 }
1736
1737
1738
1739
1740 /*************************************************
1741 * Address-independent error *
1742 *************************************************/
1743
1744 /* This function is called when there's an error that is not dependent on a
1745 particular address, such as an expansion string failure. It puts the error into
1746 all the addresses in a batch, logs the incident on the main and panic logs, and
1747 clears the expansions. It is mostly called from local_deliver(), but can be
1748 called for a remote delivery via findugid().
1749
1750 Arguments:
1751 logit TRUE if (MAIN+PANIC) logging required
1752 addr the first of the chain of addresses
1753 code the error code
1754 format format string for error message, or NULL if already set in addr
1755 ... arguments for the format
1756
1757 Returns: nothing
1758 */
1759
1760 static void
1761 common_error(BOOL logit, address_item *addr, int code, uschar *format, ...)
1762 {
1763 address_item *addr2;
1764 addr->basic_errno = code;
1765
1766 if (format)
1767 {
1768 va_list ap;
1769 uschar buffer[512];
1770 va_start(ap, format);
1771 if (!string_vformat(buffer, sizeof(buffer), CS format, ap))
1772 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1773 "common_error expansion was longer than " SIZE_T_FMT, sizeof(buffer));
1774 va_end(ap);
1775 addr->message = string_copy(buffer);
1776 }
1777
1778 for (addr2 = addr->next; addr2; addr2 = addr2->next)
1779 {
1780 addr2->basic_errno = code;
1781 addr2->message = addr->message;
1782 }
1783
1784 if (logit) log_write(0, LOG_MAIN|LOG_PANIC, "%s", addr->message);
1785 deliver_set_expansions(NULL);
1786 }
1787
1788
1789
1790
1791 /*************************************************
1792 * Check a "never users" list *
1793 *************************************************/
1794
1795 /* This function is called to check whether a uid is on one of the two "never
1796 users" lists.
1797
1798 Arguments:
1799 uid the uid to be checked
1800 nusers the list to be scanned; the first item in the list is the count
1801
1802 Returns: TRUE if the uid is on the list
1803 */
1804
1805 static BOOL
1806 check_never_users(uid_t uid, uid_t *nusers)
1807 {
1808 int i;
1809 if (!nusers) return FALSE;
1810 for (i = 1; i <= (int)(nusers[0]); i++) if (nusers[i] == uid) return TRUE;
1811 return FALSE;
1812 }
1813
1814
1815
1816 /*************************************************
1817 * Find uid and gid for a transport *
1818 *************************************************/
1819
1820 /* This function is called for both local and remote deliveries, to find the
1821 uid/gid under which to run the delivery. The values are taken preferentially
1822 from the transport (either explicit or deliver_as_creator), then from the
1823 address (i.e. the router), and if nothing is set, the exim uid/gid are used. If
1824 the resulting uid is on the "never_users" or the "fixed_never_users" list, a
1825 panic error is logged, and the function fails (which normally leads to delivery
1826 deferral).
1827
1828 Arguments:
1829 addr the address (possibly a chain)
1830 tp the transport
1831 uidp pointer to uid field
1832 gidp pointer to gid field
1833 igfp pointer to the use_initgroups field
1834
1835 Returns: FALSE if failed - error has been set in address(es)
1836 */
1837
1838 static BOOL
1839 findugid(address_item *addr, transport_instance *tp, uid_t *uidp, gid_t *gidp,
1840 BOOL *igfp)
1841 {
1842 uschar *nuname;
1843 BOOL gid_set = FALSE;
1844
1845 /* Default initgroups flag comes from the transport */
1846
1847 *igfp = tp->initgroups;
1848
1849 /* First see if there's a gid on the transport, either fixed or expandable.
1850 The expanding function always logs failure itself. */
1851
1852 if (tp->gid_set)
1853 {
1854 *gidp = tp->gid;
1855 gid_set = TRUE;
1856 }
1857 else if (tp->expand_gid)
1858 {
1859 if (!route_find_expanded_group(tp->expand_gid, tp->name, US"transport", gidp,
1860 &(addr->message)))
1861 {
1862 common_error(FALSE, addr, ERRNO_GIDFAIL, NULL);
1863 return FALSE;
1864 }
1865 gid_set = TRUE;
1866 }
1867
1868 /* If the transport did not set a group, see if the router did. */
1869
1870 if (!gid_set && testflag(addr, af_gid_set))
1871 {
1872 *gidp = addr->gid;
1873 gid_set = TRUE;
1874 }
1875
1876 /* Pick up a uid from the transport if one is set. */
1877
1878 if (tp->uid_set) *uidp = tp->uid;
1879
1880 /* Otherwise, try for an expandable uid field. If it ends up as a numeric id,
1881 it does not provide a passwd value from which a gid can be taken. */
1882
1883 else if (tp->expand_uid)
1884 {
1885 struct passwd *pw;
1886 if (!route_find_expanded_user(tp->expand_uid, tp->name, US"transport", &pw,
1887 uidp, &(addr->message)))
1888 {
1889 common_error(FALSE, addr, ERRNO_UIDFAIL, NULL);
1890 return FALSE;
1891 }
1892 if (!gid_set && pw)
1893 {
1894 *gidp = pw->pw_gid;
1895 gid_set = TRUE;
1896 }
1897 }
1898
1899 /* If the transport doesn't set the uid, test the deliver_as_creator flag. */
1900
1901 else if (tp->deliver_as_creator)
1902 {
1903 *uidp = originator_uid;
1904 if (!gid_set)
1905 {
1906 *gidp = originator_gid;
1907 gid_set = TRUE;
1908 }
1909 }
1910
1911 /* Otherwise see if the address specifies the uid and if so, take it and its
1912 initgroups flag. */
1913
1914 else if (testflag(addr, af_uid_set))
1915 {
1916 *uidp = addr->uid;
1917 *igfp = testflag(addr, af_initgroups);
1918 }
1919
1920 /* Nothing has specified the uid - default to the Exim user, and group if the
1921 gid is not set. */
1922
1923 else
1924 {
1925 *uidp = exim_uid;
1926 if (!gid_set)
1927 {
1928 *gidp = exim_gid;
1929 gid_set = TRUE;
1930 }
1931 }
1932
1933 /* If no gid is set, it is a disaster. We default to the Exim gid only if
1934 defaulting to the Exim uid. In other words, if the configuration has specified
1935 a uid, it must also provide a gid. */
1936
1937 if (!gid_set)
1938 {
1939 common_error(TRUE, addr, ERRNO_GIDFAIL, US"User set without group for "
1940 "%s transport", tp->name);
1941 return FALSE;
1942 }
1943
1944 /* Check that the uid is not on the lists of banned uids that may not be used
1945 for delivery processes. */
1946
1947 nuname = check_never_users(*uidp, never_users)
1948 ? US"never_users"
1949 : check_never_users(*uidp, fixed_never_users)
1950 ? US"fixed_never_users"
1951 : NULL;
1952 if (nuname)
1953 {
1954 common_error(TRUE, addr, ERRNO_UIDFAIL, US"User %ld set for %s transport "
1955 "is on the %s list", (long int)(*uidp), tp->name, nuname);
1956 return FALSE;
1957 }
1958
1959 /* All is well */
1960
1961 return TRUE;
1962 }
1963
1964
1965
1966
1967 /*************************************************
1968 * Check the size of a message for a transport *
1969 *************************************************/
1970
1971 /* Checks that the message isn't too big for the selected transport.
1972 This is called only when it is known that the limit is set.
1973
1974 Arguments:
1975 tp the transport
1976 addr the (first) address being delivered
1977
1978 Returns: OK
1979 DEFER expansion failed or did not yield an integer
1980 FAIL message too big
1981 */
1982
1983 int
1984 check_message_size(transport_instance *tp, address_item *addr)
1985 {
1986 int rc = OK;
1987 int size_limit;
1988
1989 deliver_set_expansions(addr);
1990 size_limit = expand_string_integer(tp->message_size_limit, TRUE);
1991 deliver_set_expansions(NULL);
1992
1993 if (expand_string_message)
1994 {
1995 rc = DEFER;
1996 addr->message = size_limit == -1
1997 ? string_sprintf("failed to expand message_size_limit "
1998 "in %s transport: %s", tp->name, expand_string_message)
1999 : string_sprintf("invalid message_size_limit "
2000 "in %s transport: %s", tp->name, expand_string_message);
2001 }
2002 else if (size_limit > 0 && message_size > size_limit)
2003 {
2004 rc = FAIL;
2005 addr->message =
2006 string_sprintf("message is too big (transport limit = %d)",
2007 size_limit);
2008 }
2009
2010 return rc;
2011 }
2012
2013
2014
2015 /*************************************************
2016 * Transport-time check for a previous delivery *
2017 *************************************************/
2018
2019 /* Check that this base address hasn't previously been delivered to its routed
2020 transport. If it has been delivered, mark it done. The check is necessary at
2021 delivery time in order to handle homonymic addresses correctly in cases where
2022 the pattern of redirection changes between delivery attempts (so the unique
2023 fields change). Non-homonymic previous delivery is detected earlier, at routing
2024 time (which saves unnecessary routing).
2025
2026 Arguments:
2027 addr the address item
2028 testing TRUE if testing wanted only, without side effects
2029
2030 Returns: TRUE if previously delivered by the transport
2031 */
2032
2033 static BOOL
2034 previously_transported(address_item *addr, BOOL testing)
2035 {
2036 (void)string_format(big_buffer, big_buffer_size, "%s/%s",
2037 addr->unique + (testflag(addr, af_homonym)? 3:0), addr->transport->name);
2038
2039 if (tree_search(tree_nonrecipients, big_buffer) != 0)
2040 {
2041 DEBUG(D_deliver|D_route|D_transport)
2042 debug_printf("%s was previously delivered (%s transport): discarded\n",
2043 addr->address, addr->transport->name);
2044 if (!testing) child_done(addr, tod_stamp(tod_log));
2045 return TRUE;
2046 }
2047
2048 return FALSE;
2049 }
2050
2051
2052
2053 /******************************************************
2054 * Check for a given header in a header string *
2055 ******************************************************/
2056
2057 /* This function is used when generating quota warnings. The configuration may
2058 specify any header lines it likes in quota_warn_message. If certain of them are
2059 missing, defaults are inserted, so we need to be able to test for the presence
2060 of a given header.
2061
2062 Arguments:
2063 hdr the required header name
2064 hstring the header string
2065
2066 Returns: TRUE the header is in the string
2067 FALSE the header is not in the string
2068 */
2069
2070 static BOOL
2071 contains_header(uschar *hdr, uschar *hstring)
2072 {
2073 int len = Ustrlen(hdr);
2074 uschar *p = hstring;
2075 while (*p != 0)
2076 {
2077 if (strncmpic(p, hdr, len) == 0)
2078 {
2079 p += len;
2080 while (*p == ' ' || *p == '\t') p++;
2081 if (*p == ':') return TRUE;
2082 }
2083 while (*p != 0 && *p != '\n') p++;
2084 if (*p == '\n') p++;
2085 }
2086 return FALSE;
2087 }
2088
2089
2090
2091
2092 /*************************************************
2093 * Perform a local delivery *
2094 *************************************************/
2095
2096 /* Each local delivery is performed in a separate process which sets its
2097 uid and gid as specified. This is a safer way than simply changing and
2098 restoring using seteuid(); there is a body of opinion that seteuid() cannot be
2099 used safely. From release 4, Exim no longer makes any use of it. Besides, not
2100 all systems have seteuid().
2101
2102 If the uid/gid are specified in the transport_instance, they are used; the
2103 transport initialization must ensure that either both or neither are set.
2104 Otherwise, the values associated with the address are used. If neither are set,
2105 it is a configuration error.
2106
2107 The transport or the address may specify a home directory (transport over-
2108 rides), and if they do, this is set as $home. If neither have set a working
2109 directory, this value is used for that as well. Otherwise $home is left unset
2110 and the cwd is set to "/" - a directory that should be accessible to all users.
2111
2112 Using a separate process makes it more complicated to get error information
2113 back. We use a pipe to pass the return code and also an error code and error
2114 text string back to the parent process.
2115
2116 Arguments:
2117 addr points to an address block for this delivery; for "normal" local
2118 deliveries this is the only address to be delivered, but for
2119 pseudo-remote deliveries (e.g. by batch SMTP to a file or pipe)
2120 a number of addresses can be handled simultaneously, and in this
2121 case addr will point to a chain of addresses with the same
2122 characteristics.
2123
2124 shadowing TRUE if running a shadow transport; this causes output from pipes
2125 to be ignored.
2126
2127 Returns: nothing
2128 */
2129
2130 static void
2131 deliver_local(address_item *addr, BOOL shadowing)
2132 {
2133 BOOL use_initgroups;
2134 uid_t uid;
2135 gid_t gid;
2136 int status, len, rc;
2137 int pfd[2];
2138 pid_t pid;
2139 uschar *working_directory;
2140 address_item *addr2;
2141 transport_instance *tp = addr->transport;
2142
2143 /* Set up the return path from the errors or sender address. If the transport
2144 has its own return path setting, expand it and replace the existing value. */
2145
2146 if(addr->prop.errors_address)
2147 return_path = addr->prop.errors_address;
2148 #ifdef EXPERIMENTAL_SRS
2149 else if (addr->prop.srs_sender)
2150 return_path = addr->prop.srs_sender;
2151 #endif
2152 else
2153 return_path = sender_address;
2154
2155 if (tp->return_path)
2156 {
2157 uschar *new_return_path = expand_string(tp->return_path);
2158 if (!new_return_path)
2159 {
2160 if (!f.expand_string_forcedfail)
2161 {
2162 common_error(TRUE, addr, ERRNO_EXPANDFAIL,
2163 US"Failed to expand return path \"%s\" in %s transport: %s",
2164 tp->return_path, tp->name, expand_string_message);
2165 return;
2166 }
2167 }
2168 else return_path = new_return_path;
2169 }
2170
2171 /* For local deliveries, one at a time, the value used for logging can just be
2172 set directly, once and for all. */
2173
2174 used_return_path = return_path;
2175
2176 /* Sort out the uid, gid, and initgroups flag. If an error occurs, the message
2177 gets put into the address(es), and the expansions are unset, so we can just
2178 return. */
2179
2180 if (!findugid(addr, tp, &uid, &gid, &use_initgroups)) return;
2181
2182 /* See if either the transport or the address specifies a home directory. A
2183 home directory set in the address may already be expanded; a flag is set to
2184 indicate that. In other cases we must expand it. */
2185
2186 if ( (deliver_home = tp->home_dir) /* Set in transport, or */
2187 || ( (deliver_home = addr->home_dir) /* Set in address and */
2188 && !testflag(addr, af_home_expanded) /* not expanded */
2189 ) )
2190 {
2191 uschar *rawhome = deliver_home;
2192 deliver_home = NULL; /* in case it contains $home */
2193 if (!(deliver_home = expand_string(rawhome)))
2194 {
2195 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"home directory \"%s\" failed "
2196 "to expand for %s transport: %s", rawhome, tp->name,
2197 expand_string_message);
2198 return;
2199 }
2200 if (*deliver_home != '/')
2201 {
2202 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"home directory path \"%s\" "
2203 "is not absolute for %s transport", deliver_home, tp->name);
2204 return;
2205 }
2206 }
2207
2208 /* See if either the transport or the address specifies a current directory,
2209 and if so, expand it. If nothing is set, use the home directory, unless it is
2210 also unset in which case use "/", which is assumed to be a directory to which
2211 all users have access. It is necessary to be in a visible directory for some
2212 operating systems when running pipes, as some commands (e.g. "rm" under Solaris
2213 2.5) require this. */
2214
2215 working_directory = tp->current_dir ? tp->current_dir : addr->current_dir;
2216 if (working_directory)
2217 {
2218 uschar *raw = working_directory;
2219 if (!(working_directory = expand_string(raw)))
2220 {
2221 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"current directory \"%s\" "
2222 "failed to expand for %s transport: %s", raw, tp->name,
2223 expand_string_message);
2224 return;
2225 }
2226 if (*working_directory != '/')
2227 {
2228 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"current directory path "
2229 "\"%s\" is not absolute for %s transport", working_directory, tp->name);
2230 return;
2231 }
2232 }
2233 else working_directory = deliver_home ? deliver_home : US"/";
2234
2235 /* If one of the return_output flags is set on the transport, create and open a
2236 file in the message log directory for the transport to write its output onto.
2237 This is mainly used by pipe transports. The file needs to be unique to the
2238 address. This feature is not available for shadow transports. */
2239
2240 if ( !shadowing
2241 && ( tp->return_output || tp->return_fail_output
2242 || tp->log_output || tp->log_fail_output || tp->log_defer_output
2243 ) )
2244 {
2245 uschar * error;
2246
2247 addr->return_filename =
2248 spool_fname(US"msglog", message_subdir, message_id,
2249 string_sprintf("-%d-%d", getpid(), return_count++));
2250
2251 if ((addr->return_file = open_msglog_file(addr->return_filename, 0400, &error)) < 0)
2252 {
2253 common_error(TRUE, addr, errno, US"Unable to %s file for %s transport "
2254 "to return message: %s", error, tp->name, strerror(errno));
2255 return;
2256 }
2257 }
2258
2259 /* Create the pipe for inter-process communication. */
2260
2261 if (pipe(pfd) != 0)
2262 {
2263 common_error(TRUE, addr, ERRNO_PIPEFAIL, US"Creation of pipe failed: %s",
2264 strerror(errno));
2265 return;
2266 }
2267
2268 /* Now fork the process to do the real work in the subprocess, but first
2269 ensure that all cached resources are freed so that the subprocess starts with
2270 a clean slate and doesn't interfere with the parent process. */
2271
2272 search_tidyup();
2273
2274 if ((pid = fork()) == 0)
2275 {
2276 BOOL replicate = TRUE;
2277
2278 /* Prevent core dumps, as we don't want them in users' home directories.
2279 HP-UX doesn't have RLIMIT_CORE; I don't know how to do this in that
2280 system. Some experimental/developing systems (e.g. GNU/Hurd) may define
2281 RLIMIT_CORE but not support it in setrlimit(). For such systems, do not
2282 complain if the error is "not supported".
2283
2284 There are two scenarios where changing the max limit has an effect. In one,
2285 the user is using a .forward and invoking a command of their choice via pipe;
2286 for these, we do need the max limit to be 0 unless the admin chooses to
2287 permit an increased limit. In the other, the command is invoked directly by
2288 the transport and is under administrator control, thus being able to raise
2289 the limit aids in debugging. So there's no general always-right answer.
2290
2291 Thus we inhibit core-dumps completely but let individual transports, while
2292 still root, re-raise the limits back up to aid debugging. We make the
2293 default be no core-dumps -- few enough people can use core dumps in
2294 diagnosis that it's reasonable to make them something that has to be explicitly requested.
2295 */
2296
2297 #ifdef RLIMIT_CORE
2298 struct rlimit rl;
2299 rl.rlim_cur = 0;
2300 rl.rlim_max = 0;
2301 if (setrlimit(RLIMIT_CORE, &rl) < 0)
2302 {
2303 # ifdef SETRLIMIT_NOT_SUPPORTED
2304 if (errno != ENOSYS && errno != ENOTSUP)
2305 # endif
2306 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_CORE) failed: %s",
2307 strerror(errno));
2308 }
2309 #endif
2310
2311 /* Reset the random number generator, so different processes don't all
2312 have the same sequence. */
2313
2314 random_seed = 0;
2315
2316 /* If the transport has a setup entry, call this first, while still
2317 privileged. (Appendfile uses this to expand quota, for example, while
2318 able to read private files.) */
2319
2320 if (addr->transport->setup)
2321 switch((addr->transport->setup)(addr->transport, addr, NULL, uid, gid,
2322 &(addr->message)))
2323 {
2324 case DEFER:
2325 addr->transport_return = DEFER;
2326 goto PASS_BACK;
2327
2328 case FAIL:
2329 addr->transport_return = PANIC;
2330 goto PASS_BACK;
2331 }
2332
2333 /* Ignore SIGINT and SIGTERM during delivery. Also ignore SIGUSR1, as
2334 when the process becomes unprivileged, it won't be able to write to the
2335 process log. SIGHUP is ignored throughout exim, except when it is being
2336 run as a daemon. */
2337
2338 signal(SIGINT, SIG_IGN);
2339 signal(SIGTERM, SIG_IGN);
2340 signal(SIGUSR1, SIG_IGN);
2341
2342 /* Close the unwanted half of the pipe, and set close-on-exec for the other
2343 half - for transports that exec things (e.g. pipe). Then set the required
2344 gid/uid. */
2345
2346 (void)close(pfd[pipe_read]);
2347 (void)fcntl(pfd[pipe_write], F_SETFD, fcntl(pfd[pipe_write], F_GETFD) |
2348 FD_CLOEXEC);
2349 exim_setugid(uid, gid, use_initgroups,
2350 string_sprintf("local delivery to %s <%s> transport=%s", addr->local_part,
2351 addr->address, addr->transport->name));
2352
2353 DEBUG(D_deliver)
2354 {
2355 address_item *batched;
2356 debug_printf(" home=%s current=%s\n", deliver_home, working_directory);
2357 for (batched = addr->next; batched; batched = batched->next)
2358 debug_printf("additional batched address: %s\n", batched->address);
2359 }
2360
2361 /* Set an appropriate working directory. */
2362
2363 if (Uchdir(working_directory) < 0)
2364 {
2365 addr->transport_return = DEFER;
2366 addr->basic_errno = errno;
2367 addr->message = string_sprintf("failed to chdir to %s", working_directory);
2368 }
2369
2370 /* If successful, call the transport */
2371
2372 else
2373 {
2374 BOOL ok = TRUE;
2375 set_process_info("delivering %s to %s using %s", message_id,
2376 addr->local_part, addr->transport->name);
2377
2378 /* Setting this global in the subprocess means we need never clear it */
2379 transport_name = addr->transport->name;
2380
2381 /* If a transport filter has been specified, set up its argument list.
2382 Any errors will get put into the address, and FALSE yielded. */
2383
2384 if (addr->transport->filter_command)
2385 {
2386 ok = transport_set_up_command(&transport_filter_argv,
2387 addr->transport->filter_command,
2388 TRUE, PANIC, addr, US"transport filter", NULL);
2389 transport_filter_timeout = addr->transport->filter_timeout;
2390 }
2391 else transport_filter_argv = NULL;
2392
2393 if (ok)
2394 {
2395 debug_print_string(addr->transport->debug_string);
2396 replicate = !(addr->transport->info->code)(addr->transport, addr);
2397 }
2398 }
2399
2400 /* Pass the results back down the pipe. If necessary, first replicate the
2401 status in the top address to the others in the batch. The label is the
2402 subject of a goto when a call to the transport's setup function fails. We
2403 pass the pointer to the transport back in case it got changed as a result of
2404 file_format in appendfile. */
2405
2406 PASS_BACK:
2407
2408 if (replicate) replicate_status(addr);
2409 for (addr2 = addr; addr2; addr2 = addr2->next)
2410 {
2411 int i;
2412 int local_part_length = Ustrlen(addr2->local_part);
2413 uschar *s;
2414 int ret;
2415
2416 if( (ret = write(pfd[pipe_write], &addr2->transport_return, sizeof(int))) != sizeof(int)
2417 || (ret = write(pfd[pipe_write], &transport_count, sizeof(transport_count))) != sizeof(transport_count)
2418 || (ret = write(pfd[pipe_write], &addr2->flags, sizeof(addr2->flags))) != sizeof(addr2->flags)
2419 || (ret = write(pfd[pipe_write], &addr2->basic_errno, sizeof(int))) != sizeof(int)
2420 || (ret = write(pfd[pipe_write], &addr2->more_errno, sizeof(int))) != sizeof(int)
2421 || (ret = write(pfd[pipe_write], &addr2->delivery_usec, sizeof(int))) != sizeof(int)
2422 || (ret = write(pfd[pipe_write], &addr2->special_action, sizeof(int))) != sizeof(int)
2423 || (ret = write(pfd[pipe_write], &addr2->transport,
2424 sizeof(transport_instance *))) != sizeof(transport_instance *)
2425
2426 /* For a file delivery, pass back the local part, in case the original
2427 was only part of the final delivery path. This gives more complete
2428 logging. */
2429
2430 || (testflag(addr2, af_file)
2431 && ( (ret = write(pfd[pipe_write], &local_part_length, sizeof(int))) != sizeof(int)
2432 || (ret = write(pfd[pipe_write], addr2->local_part, local_part_length)) != local_part_length
2433 )
2434 )
2435 )
2436 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s",
2437 ret == -1 ? strerror(errno) : "short write");
2438
2439 /* Now any messages */
2440
2441 for (i = 0, s = addr2->message; i < 2; i++, s = addr2->user_message)
2442 {
2443 int message_length = s ? Ustrlen(s) + 1 : 0;
2444 if( (ret = write(pfd[pipe_write], &message_length, sizeof(int))) != sizeof(int)
2445 || message_length > 0 && (ret = write(pfd[pipe_write], s, message_length)) != message_length
2446 )
2447 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s",
2448 ret == -1 ? strerror(errno) : "short write");
2449 }
2450 }
2451
2452 /* OK, this process is now done. Free any cached resources that it opened,
2453 and close the pipe we were writing down before exiting. */
2454
2455 (void)close(pfd[pipe_write]);
2456 search_tidyup();
2457 exit(EXIT_SUCCESS);
2458 }
2459
2460 /* Back in the main process: panic if the fork did not succeed. This seems
2461 better than returning an error - if forking is failing it is probably best
2462 not to try other deliveries for this message. */
2463
2464 if (pid < 0)
2465 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Fork failed for local delivery to %s",
2466 addr->address);
2467
2468 /* Read the pipe to get the delivery status codes and error messages. Our copy
2469 of the writing end must be closed first, as otherwise read() won't return zero
2470 on an empty pipe. We check that a status exists for each address before
2471 overwriting the address structure. If data is missing, the default DEFER status
2472 will remain. Afterwards, close the reading end. */
2473
2474 (void)close(pfd[pipe_write]);
2475
2476 for (addr2 = addr; addr2; addr2 = addr2->next)
2477 {
2478 if ((len = read(pfd[pipe_read], &status, sizeof(int))) > 0)
2479 {
2480 int i;
2481 uschar **sptr;
2482
2483 addr2->transport_return = status;
2484 len = read(pfd[pipe_read], &transport_count,
2485 sizeof(transport_count));
2486 len = read(pfd[pipe_read], &addr2->flags, sizeof(addr2->flags));
2487 len = read(pfd[pipe_read], &addr2->basic_errno, sizeof(int));
2488 len = read(pfd[pipe_read], &addr2->more_errno, sizeof(int));
2489 len = read(pfd[pipe_read], &addr2->delivery_usec, sizeof(int));
2490 len = read(pfd[pipe_read], &addr2->special_action, sizeof(int));
2491 len = read(pfd[pipe_read], &addr2->transport,
2492 sizeof(transport_instance *));
2493
2494 if (testflag(addr2, af_file))
2495 {
2496 int llen;
2497 if ( read(pfd[pipe_read], &llen, sizeof(int)) != sizeof(int)
2498 || llen > 64*4 /* limit from rfc 5821, times I18N factor */
2499 )
2500 {
2501 log_write(0, LOG_MAIN|LOG_PANIC, "bad local_part length read"
2502 " from delivery subprocess");
2503 break;
2504 }
2505 /* sanity-checked llen so disable the Coverity error */
2506 /* coverity[tainted_data] */
2507 if (read(pfd[pipe_read], big_buffer, llen) != llen)
2508 {
2509 log_write(0, LOG_MAIN|LOG_PANIC, "bad local_part read"
2510 " from delivery subprocess");
2511 break;
2512 }
2513 big_buffer[llen] = 0;
2514 addr2->local_part = string_copy(big_buffer);
2515 }
2516
2517 for (i = 0, sptr = &addr2->message; i < 2; i++, sptr = &addr2->user_message)
2518 {
2519 int message_length;
2520 len = read(pfd[pipe_read], &message_length, sizeof(int));
2521 if (message_length > 0)
2522 {
2523 len = read(pfd[pipe_read], big_buffer, message_length);
2524 big_buffer[big_buffer_size-1] = '\0'; /* guard byte */
2525 if (len > 0) *sptr = string_copy(big_buffer);
2526 }
2527 }
2528 }
2529
2530 else
2531 {
2532 log_write(0, LOG_MAIN|LOG_PANIC, "failed to read delivery status for %s "
2533 "from delivery subprocess", addr2->unique);
2534 break;
2535 }
2536 }
2537
2538 (void)close(pfd[pipe_read]);
2539
2540 /* Unless shadowing, write all successful addresses immediately to the journal
2541 file, to ensure they are recorded asap. For homonymic addresses, use the base
2542 address plus the transport name. Failure to write the journal is panic-worthy,
2543 but don't stop, as it may prove possible subsequently to update the spool file
2544 in order to record the delivery. */
2545
2546 if (!shadowing)
2547 {
2548 for (addr2 = addr; addr2; addr2 = addr2->next)
2549 if (addr2->transport_return == OK)
2550 {
2551 if (testflag(addr2, af_homonym))
2552 sprintf(CS big_buffer, "%.500s/%s\n", addr2->unique + 3, tp->name);
2553 else
2554 sprintf(CS big_buffer, "%.500s\n", addr2->unique);
2555
2556 /* In the test harness, wait just a bit to let the subprocess finish off
2557 any debug output etc first. */
2558
2559 if (f.running_in_test_harness) millisleep(300);
2560
2561 DEBUG(D_deliver) debug_printf("journalling %s", big_buffer);
2562 len = Ustrlen(big_buffer);
2563 if (write(journal_fd, big_buffer, len) != len)
2564 log_write(0, LOG_MAIN|LOG_PANIC, "failed to update journal for %s: %s",
2565 big_buffer, strerror(errno));
2566 }
2567
2568 /* Ensure the journal file is pushed out to disk. */
2569
2570 if (EXIMfsync(journal_fd) < 0)
2571 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s",
2572 strerror(errno));
2573 }
2574
2575 /* Wait for the process to finish. If it terminates with a non-zero code,
2576 freeze the message (except for SIGTERM, SIGKILL and SIGQUIT), but leave the
2577 status values of all the addresses as they are. Take care to handle the case
2578 when the subprocess doesn't seem to exist. This has been seen on one system
2579 when Exim was called from an MUA that set SIGCHLD to SIG_IGN. When that
2580 happens, wait() doesn't recognize the termination of child processes. Exim now
2581 resets SIGCHLD to SIG_DFL, but this code should still be robust. */
2582
2583 while ((rc = wait(&status)) != pid)
2584 if (rc < 0 && errno == ECHILD) /* Process has vanished */
2585 {
2586 log_write(0, LOG_MAIN, "%s transport process vanished unexpectedly",
2587 addr->transport->driver_name);
2588 status = 0;
2589 break;
2590 }
2591
2592 if ((status & 0xffff) != 0)
2593 {
2594 int msb = (status >> 8) & 255;
2595 int lsb = status & 255;
2596 int code = (msb == 0)? (lsb & 0x7f) : msb;
2597 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
2598 addr->special_action = SPECIAL_FREEZE;
2599 log_write(0, LOG_MAIN|LOG_PANIC, "%s transport process returned non-zero "
2600 "status 0x%04x: %s %d",
2601 addr->transport->driver_name,
2602 status,
2603 msb == 0 ? "terminated by signal" : "exit code",
2604 code);
2605 }
2606
2607 /* If SPECIAL_WARN is set in the top address, send a warning message. */
2608
2609 if (addr->special_action == SPECIAL_WARN && addr->transport->warn_message)
2610 {
2611 int fd;
2612 uschar *warn_message;
2613 pid_t pid;
2614
2615 DEBUG(D_deliver) debug_printf("Warning message requested by transport\n");
2616
2617 if (!(warn_message = expand_string(addr->transport->warn_message)))
2618 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand \"%s\" (warning "
2619 "message for %s transport): %s", addr->transport->warn_message,
2620 addr->transport->name, expand_string_message);
2621
2622 else if ((pid = child_open_exim(&fd)) > 0)
2623 {
2624 FILE *f = fdopen(fd, "wb");
2625 if (errors_reply_to && !contains_header(US"Reply-To", warn_message))
2626 fprintf(f, "Reply-To: %s\n", errors_reply_to);
2627 fprintf(f, "Auto-Submitted: auto-replied\n");
2628 if (!contains_header(US"From", warn_message))
2629 moan_write_from(f);
2630 fprintf(f, "%s", CS warn_message);
2631
2632 /* Close and wait for child process to complete, without a timeout. */
2633
2634 (void)fclose(f);
2635 (void)child_close(pid, 0);
2636 }
2637
2638 addr->special_action = SPECIAL_NONE;
2639 }
2640 }
2641
2642
2643
2644
2645 /* Check transport for the given concurrency limit. Return TRUE if over
2646 the limit (or an expansion failure), else FALSE and if there was a limit,
2647 the key for the hints database used for the concurrency count. */
2648
2649 static BOOL
2650 tpt_parallel_check(transport_instance * tp, address_item * addr, uschar ** key)
2651 {
2652 unsigned max_parallel;
2653
2654 if (!tp->max_parallel) return FALSE;
2655
2656 max_parallel = (unsigned) expand_string_integer(tp->max_parallel, TRUE);
2657 if (expand_string_message)
2658 {
2659 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand max_parallel option "
2660 "in %s transport (%s): %s", tp->name, addr->address,
2661 expand_string_message);
2662 return TRUE;
2663 }
2664
2665 if (max_parallel > 0)
2666 {
2667 uschar * serialize_key = string_sprintf("tpt-serialize-%s", tp->name);
2668 if (!enq_start(serialize_key, max_parallel))
2669 {
2670 address_item * next;
2671 DEBUG(D_transport)
2672 debug_printf("skipping tpt %s because concurrency limit %u reached\n",
2673 tp->name, max_parallel);
2674 do
2675 {
2676 next = addr->next;
2677 addr->message = US"concurrency limit reached for transport";
2678 addr->basic_errno = ERRNO_TRETRY;
2679 post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_TRANSPORT, 0);
2680 } while ((addr = next));
2681 return TRUE;
2682 }
2683 *key = serialize_key;
2684 }
2685 return FALSE;
2686 }
2687
2688
2689
2690 /*************************************************
2691 * Do local deliveries *
2692 *************************************************/
2693
2694 /* This function processes the list of addresses in addr_local. True local
2695 deliveries are always done one address at a time. However, local deliveries can
2696 be batched up in some cases. Typically this is when writing batched SMTP output
2697 files for use by some external transport mechanism, or when running local
2698 deliveries over LMTP.
2699
2700 Arguments: None
2701 Returns: Nothing
2702 */
2703
2704 static void
2705 do_local_deliveries(void)
2706 {
2707 open_db dbblock;
2708 open_db *dbm_file = NULL;
2709 time_t now = time(NULL);
2710
2711 /* Loop until we have exhausted the supply of local deliveries */
2712
2713 while (addr_local)
2714 {
2715 struct timeval delivery_start;
2716 struct timeval deliver_time;
2717 address_item *addr2, *addr3, *nextaddr;
2718 int logflags = LOG_MAIN;
2719 int logchar = f.dont_deliver? '*' : '=';
2720 transport_instance *tp;
2721 uschar * serialize_key = NULL;
2722
2723 /* Pick the first undelivered address off the chain */
2724
2725 address_item *addr = addr_local;
2726 addr_local = addr->next;
2727 addr->next = NULL;
2728
2729 DEBUG(D_deliver|D_transport)
2730 debug_printf("--------> %s <--------\n", addr->address);
2731
2732 /* An internal disaster if there is no transport. Should not occur! */
2733
2734 if (!(tp = addr->transport))
2735 {
2736 logflags |= LOG_PANIC;
2737 f.disable_logging = FALSE; /* Jic */
2738 addr->message = addr->router
2739 ? string_sprintf("No transport set by %s router", addr->router->name)
2740 : string_sprintf("No transport set by system filter");
2741 post_process_one(addr, DEFER, logflags, EXIM_DTYPE_TRANSPORT, 0);
2742 continue;
2743 }
2744
2745 /* Check that this base address hasn't previously been delivered to this
2746 transport. The check is necessary at this point to handle homonymic addresses
2747 correctly in cases where the pattern of redirection changes between delivery
2748 attempts. Non-homonymic previous delivery is detected earlier, at routing
2749 time. */
2750
2751 if (previously_transported(addr, FALSE)) continue;
2752
2753 /* There are weird cases where logging is disabled */
2754
2755 f.disable_logging = tp->disable_logging;
2756
2757 /* Check for batched addresses and possible amalgamation. Skip all the work
2758 if either batch_max <= 1 or there aren't any other addresses for local
2759 delivery. */
2760
2761 if (tp->batch_max > 1 && addr_local)
2762 {
2763 int batch_count = 1;
2764 BOOL uses_dom = readconf_depends((driver_instance *)tp, US"domain");
2765 BOOL uses_lp = ( testflag(addr, af_pfr)
2766 && (testflag(addr, af_file) || addr->local_part[0] == '|')
2767 )
2768 || readconf_depends((driver_instance *)tp, US"local_part");
2769 uschar *batch_id = NULL;
2770 address_item **anchor = &addr_local;
2771 address_item *last = addr;
2772 address_item *next;
2773
2774 /* Expand the batch_id string for comparison with other addresses.
2775 Expansion failure suppresses batching. */
2776
2777 if (tp->batch_id)
2778 {
2779 deliver_set_expansions(addr);
2780 batch_id = expand_string(tp->batch_id);
2781 deliver_set_expansions(NULL);
2782 if (!batch_id)
2783 {
2784 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2785 "in %s transport (%s): %s", tp->name, addr->address,
2786 expand_string_message);
2787 batch_count = tp->batch_max;
2788 }
2789 }
2790
2791 /* Until we reach the batch_max limit, pick off addresses which have the
2792 same characteristics. These are:
2793
2794 same transport
2795 not previously delivered (see comment about 50 lines above)
2796 same local part if the transport's configuration contains $local_part
2797 or if this is a file or pipe delivery from a redirection
2798 same domain if the transport's configuration contains $domain
2799 same errors address
2800 same additional headers
2801 same headers to be removed
2802 same uid/gid for running the transport
2803 same first host if a host list is set
2804 */
2805
2806 while ((next = *anchor) && batch_count < tp->batch_max)
2807 {
2808 BOOL ok =
2809 tp == next->transport
2810 && !previously_transported(next, TRUE)
2811 && testflag(addr, af_pfr) == testflag(next, af_pfr)
2812 && testflag(addr, af_file) == testflag(next, af_file)
2813 && (!uses_lp || Ustrcmp(next->local_part, addr->local_part) == 0)
2814 && (!uses_dom || Ustrcmp(next->domain, addr->domain) == 0)
2815 && same_strings(next->prop.errors_address, addr->prop.errors_address)
2816 && same_headers(next->prop.extra_headers, addr->prop.extra_headers)
2817 && same_strings(next->prop.remove_headers, addr->prop.remove_headers)
2818 && same_ugid(tp, addr, next)
2819 && ( !addr->host_list && !next->host_list
2820 || addr->host_list
2821 && next->host_list
2822 && Ustrcmp(addr->host_list->name, next->host_list->name) == 0
2823 );
2824
2825 /* If the transport has a batch_id setting, batch_id will be non-NULL
2826 from the expansion outside the loop. Expand for this address and compare.
2827 Expansion failure makes this address ineligible for batching. */
2828
2829 if (ok && batch_id)
2830 {
2831 uschar *bid;
2832 address_item *save_nextnext = next->next;
2833 next->next = NULL; /* Expansion for a single address */
2834 deliver_set_expansions(next);
2835 next->next = save_nextnext;
2836 bid = expand_string(tp->batch_id);
2837 deliver_set_expansions(NULL);
2838 if (!bid)
2839 {
2840 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2841 "in %s transport (%s): %s", tp->name, next->address,
2842 expand_string_message);
2843 ok = FALSE;
2844 }
2845 else ok = (Ustrcmp(batch_id, bid) == 0);
2846 }
2847
2848 /* Take address into batch if OK. */
2849
2850 if (ok)
2851 {
2852 *anchor = next->next; /* Include the address */
2853 next->next = NULL;
2854 last->next = next;
2855 last = next;
2856 batch_count++;
2857 }
2858 else anchor = &next->next; /* Skip the address */
2859 }
2860 }
2861
2862 /* We now have one or more addresses that can be delivered in a batch. Check
2863 whether the transport is prepared to accept a message of this size. If not,
2864 fail them all forthwith. If the expansion fails, or does not yield an
2865 integer, defer delivery. */
2866
2867 if (tp->message_size_limit)
2868 {
2869 int rc = check_message_size(tp, addr);
2870 if (rc != OK)
2871 {
2872 replicate_status(addr);
2873 while (addr)
2874 {
2875 addr2 = addr->next;
2876 post_process_one(addr, rc, logflags, EXIM_DTYPE_TRANSPORT, 0);
2877 addr = addr2;
2878 }
2879 continue; /* With next batch of addresses */
2880 }
2881 }
2882
2883 /* If we are not running the queue, or if forcing, all deliveries will be
2884 attempted. Otherwise, we must respect the retry times for each address. Even
2885 when not doing this, we need to set up the retry key string, and determine
2886 whether a retry record exists, because after a successful delivery, a delete
2887 retry item must be set up. Keep the retry database open only for the duration
2888 of these checks, rather than for all local deliveries, because some local
2889 deliveries (e.g. to pipes) can take a substantial time. */
2890
2891 if (!(dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE)))
2892 {
2893 DEBUG(D_deliver|D_retry|D_hints_lookup)
2894 debug_printf("no retry data available\n");
2895 }
2896
2897 addr2 = addr;
2898 addr3 = NULL;
2899 while (addr2)
2900 {
2901 BOOL ok = TRUE; /* to deliver this address */
2902 uschar *retry_key;
2903
2904 /* Set up the retry key to include the domain or not, and change its
2905 leading character from "R" to "T". Must make a copy before doing this,
2906 because the old key may be pointed to from a "delete" retry item after
2907 a routing delay. */
2908
2909 retry_key = string_copy(
2910 tp->retry_use_local_part ? addr2->address_retry_key :
2911 addr2->domain_retry_key);
2912 *retry_key = 'T';
2913
2914 /* Inspect the retry data. If there is no hints file, delivery happens. */
2915
2916 if (dbm_file)
2917 {
2918 dbdata_retry *retry_record = dbfn_read(dbm_file, retry_key);
2919
2920 /* If there is no retry record, delivery happens. If there is,
2921 remember it exists so it can be deleted after a successful delivery. */
2922
2923 if (retry_record)
2924 {
2925 setflag(addr2, af_lt_retry_exists);
2926
2927 /* A retry record exists for this address. If queue running and not
2928 forcing, inspect its contents. If the record is too old, or if its
2929 retry time has come, or if it has passed its cutoff time, delivery
2930 will go ahead. */
2931
2932 DEBUG(D_retry)
2933 {
2934 debug_printf("retry record exists: age=%s ",
2935 readconf_printtime(now - retry_record->time_stamp));
2936 debug_printf("(max %s)\n", readconf_printtime(retry_data_expire));
2937 debug_printf(" time to retry = %s expired = %d\n",
2938 readconf_printtime(retry_record->next_try - now),
2939 retry_record->expired);
2940 }
2941
2942 if (f.queue_running && !f.deliver_force)
2943 {
2944 ok = (now - retry_record->time_stamp > retry_data_expire)
2945 || (now >= retry_record->next_try)
2946 || retry_record->expired;
2947
2948 /* If we haven't reached the retry time, there is one more check
2949 to do, which is for the ultimate address timeout. */
2950
2951 if (!ok)
2952 ok = retry_ultimate_address_timeout(retry_key, addr2->domain,
2953 retry_record, now);
2954 }
2955 }
2956 else DEBUG(D_retry) debug_printf("no retry record exists\n");
2957 }
2958
2959 /* This address is to be delivered. Leave it on the chain. */
2960
2961 if (ok)
2962 {
2963 addr3 = addr2;
2964 addr2 = addr2->next;
2965 }
2966
2967 /* This address is to be deferred. Take it out of the chain, and
2968 post-process it as complete. Must take it out of the chain first,
2969 because post processing puts it on another chain. */
2970
2971 else
2972 {
2973 address_item *this = addr2;
2974 this->message = US"Retry time not yet reached";
2975 this->basic_errno = ERRNO_LRETRY;
2976 addr2 = addr3 ? (addr3->next = addr2->next)
2977 : (addr = addr2->next);
2978 post_process_one(this, DEFER, logflags, EXIM_DTYPE_TRANSPORT, 0);
2979 }
2980 }
2981
2982 if (dbm_file) dbfn_close(dbm_file);
2983
2984 /* If there are no addresses left on the chain, they all deferred. Loop
2985 for the next set of addresses. */
2986
2987 if (!addr) continue;
2988
2989 /* If the transport is limited for parallellism, enforce that here.
2990 We use a hints DB entry, incremented here and decremented after
2991 the transport (and any shadow transport) completes. */
2992
2993 if (tpt_parallel_check(tp, addr, &serialize_key))
2994 {
2995 if (expand_string_message)
2996 {
2997 logflags |= LOG_PANIC;
2998 do
2999 {
3000 addr = addr->next;
3001 post_process_one(addr, DEFER, logflags, EXIM_DTYPE_TRANSPORT, 0);
3002 } while ((addr = addr2));
3003 }
3004 continue; /* Loop for the next set of addresses. */
3005 }
3006
3007
3008 /* So, finally, we do have some addresses that can be passed to the
3009 transport. Before doing so, set up variables that are relevant to a
3010 single delivery. */
3011
3012 deliver_set_expansions(addr);
3013
3014 gettimeofday(&delivery_start, NULL);
3015 deliver_local(addr, FALSE);
3016 timesince(&deliver_time, &delivery_start);
3017
3018 /* If a shadow transport (which must perforce be another local transport), is
3019 defined, and its condition is met, we must pass the message to the shadow
3020 too, but only those addresses that succeeded. We do this by making a new
3021 chain of addresses - also to keep the original chain uncontaminated. We must
3022 use a chain rather than doing it one by one, because the shadow transport may
3023 batch.
3024
3025 NOTE: if the condition fails because of a lookup defer, there is nothing we
3026 can do! */
3027
3028 if ( tp->shadow
3029 && ( !tp->shadow_condition
3030 || expand_check_condition(tp->shadow_condition, tp->name, US"transport")
3031 ) )
3032 {
3033 transport_instance *stp;
3034 address_item *shadow_addr = NULL;
3035 address_item **last = &shadow_addr;
3036
3037 for (stp = transports; stp; stp = stp->next)
3038 if (Ustrcmp(stp->name, tp->shadow) == 0) break;
3039
3040 if (!stp)
3041 log_write(0, LOG_MAIN|LOG_PANIC, "shadow transport \"%s\" not found ",
3042 tp->shadow);
3043
3044 /* Pick off the addresses that have succeeded, and make clones. Put into
3045 the shadow_message field a pointer to the shadow_message field of the real
3046 address. */
3047
3048 else for (addr2 = addr; addr2; addr2 = addr2->next)
3049 if (addr2->transport_return == OK)
3050 {
3051 addr3 = store_get(sizeof(address_item));
3052 *addr3 = *addr2;
3053 addr3->next = NULL;
3054 addr3->shadow_message = US &addr2->shadow_message;
3055 addr3->transport = stp;
3056 addr3->transport_return = DEFER;
3057 addr3->return_filename = NULL;
3058 addr3->return_file = -1;
3059 *last = addr3;
3060 last = &addr3->next;
3061 }
3062
3063 /* If we found any addresses to shadow, run the delivery, and stick any
3064 message back into the shadow_message field in the original. */
3065
3066 if (shadow_addr)
3067 {
3068 int save_count = transport_count;
3069
3070 DEBUG(D_deliver|D_transport)
3071 debug_printf(">>>>>>>>>>>>>>>> Shadow delivery >>>>>>>>>>>>>>>>\n");
3072 deliver_local(shadow_addr, TRUE);
3073
3074 for(; shadow_addr; shadow_addr = shadow_addr->next)
3075 {
3076 int sresult = shadow_addr->transport_return;
3077 *(uschar **)shadow_addr->shadow_message =
3078 sresult == OK
3079 ? string_sprintf(" ST=%s", stp->name)
3080 : string_sprintf(" ST=%s (%s%s%s)", stp->name,
3081 shadow_addr->basic_errno <= 0
3082 ? US""
3083 : US strerror(shadow_addr->basic_errno),
3084 shadow_addr->basic_errno <= 0 || !shadow_addr->message
3085 ? US""
3086 : US": ",
3087 shadow_addr->message
3088 ? shadow_addr->message
3089 : shadow_addr->basic_errno <= 0
3090 ? US"unknown error"
3091 : US"");
3092
3093 DEBUG(D_deliver|D_transport)
3094 debug_printf("%s shadow transport returned %s for %s\n",
3095 stp->name,
3096 sresult == OK ? "OK" :
3097 sresult == DEFER ? "DEFER" :
3098 sresult == FAIL ? "FAIL" :
3099 sresult == PANIC ? "PANIC" : "?",
3100 shadow_addr->address);
3101 }
3102
3103 DEBUG(D_deliver|D_transport)
3104 debug_printf(">>>>>>>>>>>>>>>> End shadow delivery >>>>>>>>>>>>>>>>\n");
3105
3106 transport_count = save_count; /* Restore original transport count */
3107 }
3108 }
3109
3110 /* Cancel the expansions that were set up for the delivery. */
3111
3112 deliver_set_expansions(NULL);
3113
3114 /* If the transport was parallelism-limited, decrement the hints DB record. */
3115
3116 if (serialize_key) enq_end(serialize_key);
3117
3118 /* Now we can process the results of the real transport. We must take each
3119 address off the chain first, because post_process_one() puts it on another
3120 chain. */
3121
3122 for (addr2 = addr; addr2; addr2 = nextaddr)
3123 {
3124 int result = addr2->transport_return;
3125 nextaddr = addr2->next;
3126
3127 DEBUG(D_deliver|D_transport)
3128 debug_printf("%s transport returned %s for %s\n",
3129 tp->name,
3130 result == OK ? "OK" :
3131 result == DEFER ? "DEFER" :
3132 result == FAIL ? "FAIL" :
3133 result == PANIC ? "PANIC" : "?",
3134 addr2->address);
3135
3136 /* If there is a retry_record, or if delivery is deferred, build a retry
3137 item for setting a new retry time or deleting the old retry record from
3138 the database. These items are handled all together after all addresses
3139 have been handled (so the database is open just for a short time for
3140 updating). */
3141
3142 if (result == DEFER || testflag(addr2, af_lt_retry_exists))
3143 {
3144 int flags = result == DEFER ? 0 : rf_delete;
3145 uschar *retry_key = string_copy(tp->retry_use_local_part
3146 ? addr2->address_retry_key : addr2->domain_retry_key);
3147 *retry_key = 'T';
3148 retry_add_item(addr2, retry_key, flags);
3149 }
3150
3151 /* Done with this address */
3152
3153 if (result == OK)
3154 {
3155 addr2->more_errno = deliver_time.tv_sec;
3156 addr2->delivery_usec = deliver_time.tv_usec;
3157 }
3158 post_process_one(addr2, result, logflags, EXIM_DTYPE_TRANSPORT, logchar);
3159
3160 /* If a pipe delivery generated text to be sent back, the result may be
3161 changed to FAIL, and we must copy this for subsequent addresses in the
3162 batch. */
3163
3164 if (addr2->transport_return != result)
3165 {
3166 for (addr3 = nextaddr; addr3; addr3 = addr3->next)
3167 {
3168 addr3->transport_return = addr2->transport_return;
3169 addr3->basic_errno = addr2->basic_errno;
3170 addr3->message = addr2->message;
3171 }
3172 result = addr2->transport_return;
3173 }
3174
3175 /* Whether or not the result was changed to FAIL, we need to copy the
3176 return_file value from the first address into all the addresses of the
3177 batch, so they are all listed in the error message. */
3178
3179 addr2->return_file = addr->return_file;
3180
3181 /* Change log character for recording successful deliveries. */
3182
3183 if (result == OK) logchar = '-';
3184 }
3185 } /* Loop back for next batch of addresses */
3186 }
3187
3188
3189
3190
3191 /*************************************************
3192 * Sort remote deliveries *
3193 *************************************************/
3194
3195 /* This function is called if remote_sort_domains is set. It arranges that the
3196 chain of addresses for remote deliveries is ordered according to the strings
3197 specified. Try to make this shuffling reasonably efficient by handling
3198 sequences of addresses rather than just single ones.
3199
3200 Arguments: None
3201 Returns: Nothing
3202 */
3203
3204 static void
3205 sort_remote_deliveries(void)
3206 {
3207 int sep = 0;
3208 address_item **aptr = &addr_remote;
3209 const uschar *listptr = remote_sort_domains;
3210 uschar *pattern;
3211 uschar patbuf[256];
3212
3213 while ( *aptr
3214 && (pattern = string_nextinlist(&listptr, &sep, patbuf, sizeof(patbuf)))
3215 )
3216 {
3217 address_item *moved = NULL;
3218 address_item **bptr = &moved;
3219
3220 while (*aptr)
3221 {
3222 address_item **next;
3223 deliver_domain = (*aptr)->domain; /* set $domain */
3224 if (match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1,
3225 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK)
3226 {
3227 aptr = &(*aptr)->next;
3228 continue;
3229 }
3230
3231 next = &(*aptr)->next;
3232 while ( *next
3233 && (deliver_domain = (*next)->domain, /* Set $domain */
3234 match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1,
3235 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL)) != OK
3236 )
3237 next = &(*next)->next;
3238
3239 /* If the batch of non-matchers is at the end, add on any that were
3240 extracted further up the chain, and end this iteration. Otherwise,
3241 extract them from the chain and hang on the moved chain. */
3242
3243 if (!*next)
3244 {
3245 *next = moved;
3246 break;
3247 }
3248
3249 *bptr = *aptr;
3250 *aptr = *next;
3251 *next = NULL;
3252 bptr = next;
3253 aptr = &(*aptr)->next;
3254 }
3255
3256 /* If the loop ended because the final address matched, *aptr will
3257 be NULL. Add on to the end any extracted non-matching addresses. If
3258 *aptr is not NULL, the loop ended via "break" when *next is null, that
3259 is, there was a string of non-matching addresses at the end. In this
3260 case the extracted addresses have already been added on the end. */
3261
3262 if (!*aptr) *aptr = moved;
3263 }
3264
3265 DEBUG(D_deliver)
3266 {
3267 address_item *addr;
3268 debug_printf("remote addresses after sorting:\n");
3269 for (addr = addr_remote; addr; addr = addr->next)
3270 debug_printf(" %s\n", addr->address);
3271 }
3272 }
3273
3274
3275
3276 /*************************************************
3277 * Read from pipe for remote delivery subprocess *
3278 *************************************************/
3279
3280 /* This function is called when the subprocess is complete, but can also be
3281 called before it is complete, in order to empty a pipe that is full (to prevent
3282 deadlock). It must therefore keep track of its progress in the parlist data
3283 block.
3284
3285 We read the pipe to get the delivery status codes and a possible error message
3286 for each address, optionally preceded by unusability data for the hosts and
3287 also by optional retry data.
3288
3289 Read in large chunks into the big buffer and then scan through, interpreting
3290 the data therein. In most cases, only a single read will be necessary. No
3291 individual item will ever be anywhere near 2500 bytes in length, so by ensuring
3292 that we read the next chunk when there is less than 2500 bytes left in the
3293 non-final chunk, we can assume each item is complete in the buffer before
3294 handling it. Each item is written using a single write(), which is atomic for
3295 small items (less than PIPE_BUF, which seems to be at least 512 in any Unix and
3296 often bigger) so even if we are reading while the subprocess is still going, we
3297 should never have only a partial item in the buffer.
3298
3299 hs12: This assumption is not true anymore, since we got quit large items (certificate
3300 information and such)
3301
3302 Argument:
3303 poffset the offset of the parlist item
3304 eop TRUE if the process has completed
3305
3306 Returns: TRUE if the terminating 'Z' item has been read,
3307 or there has been a disaster (i.e. no more data needed);
3308 FALSE otherwise
3309 */
3310
3311 static BOOL
3312 par_read_pipe(int poffset, BOOL eop)
3313 {
3314 host_item *h;
3315 pardata *p = parlist + poffset;
3316 address_item *addrlist = p->addrlist;
3317 address_item *addr = p->addr;
3318 pid_t pid = p->pid;
3319 int fd = p->fd;
3320
3321 uschar *msg = p->msg;
3322 BOOL done = p->done;
3323
3324 /* Loop through all items, reading from the pipe when necessary. The pipe
3325 used to be non-blocking. But I do not see a reason for using non-blocking I/O
3326 here, as the preceding select() tells us, if data is available for reading.
3327
3328 A read() on a "selected" handle should never block, but(!) it may return
3329 less data then we expected. (The buffer size we pass to read() shouldn't be
3330 understood as a "request", but as a "limit".)
3331
3332 Each separate item is written to the pipe in a timely manner. But, especially for
3333 larger items, the read(2) may already return partial data from the write(2).
3334
3335 The write is atomic mostly (depending on the amount written), but atomic does
3336 not imply "all or noting", it just is "not intermixed" with other writes on the
3337 same channel (pipe).
3338
3339 */
3340
3341 DEBUG(D_deliver) debug_printf("reading pipe for subprocess %d (%s)\n",
3342 (int)p->pid, eop? "ended" : "not ended yet");
3343
3344 while (!done)
3345 {
3346 retry_item *r, **rp;
3347 uschar pipeheader[PIPE_HEADER_SIZE+1];
3348 uschar *id = &pipeheader[0];
3349 uschar *subid = &pipeheader[1];
3350 uschar *ptr = big_buffer;
3351 size_t required = PIPE_HEADER_SIZE; /* first the pipehaeder, later the data */
3352 ssize_t got;
3353
3354 DEBUG(D_deliver) debug_printf(
3355 "expect %lu bytes (pipeheader) from tpt process %d\n", (u_long)required, pid);
3356
3357 /* We require(!) all the PIPE_HEADER_SIZE bytes here, as we know,
3358 they're written in a timely manner, so waiting for the write shouldn't hurt a lot.
3359 If we get less, we can assume the subprocess do be done and do not expect any further
3360 information from it. */
3361
3362 if ((got = readn(fd, pipeheader, required)) != required)
3363 {
3364 msg = string_sprintf("got " SSIZE_T_FMT " of %d bytes (pipeheader) "
3365 "from transport process %d for transport %s",
3366 got, PIPE_HEADER_SIZE, pid, addr->transport->driver_name);
3367 done = TRUE;
3368 break;
3369 }
3370
3371 pipeheader[PIPE_HEADER_SIZE] = '\0';
3372 DEBUG(D_deliver)
3373 debug_printf("got %ld bytes (pipeheader) from transport process %d\n",
3374 (long) got, pid);
3375
3376 {
3377 /* If we can't decode the pipeheader, the subprocess seems to have a
3378 problem, we do not expect any furher information from it. */
3379 char *endc;
3380 required = Ustrtol(pipeheader+2, &endc, 10);
3381 if (*endc)
3382 {
3383 msg = string_sprintf("failed to read pipe "
3384 "from transport process %d for transport %s: error decoding size from header",
3385 pid, addr->transport->driver_name);
3386 done = TRUE;
3387 break;
3388 }
3389 }
3390
3391 DEBUG(D_deliver)
3392 debug_printf("expect %lu bytes (pipedata) from transport process %d\n",
3393 (u_long)required, pid);
3394
3395 /* Same as above, the transport process will write the bytes announced
3396 in a timely manner, so we can just wait for the bytes, getting less than expected
3397 is considered a problem of the subprocess, we do not expect anything else from it. */
3398 if ((got = readn(fd, big_buffer, required)) != required)
3399 {
3400 msg = string_sprintf("got only " SSIZE_T_FMT " of " SIZE_T_FMT
3401 " bytes (pipedata) from transport process %d for transport %s",
3402 got, required, pid, addr->transport->driver_name);
3403 done = TRUE;
3404 break;
3405 }
3406
3407 /* Handle each possible type of item, assuming the complete item is
3408 available in store. */
3409
3410 switch (*id)
3411 {
3412 /* Host items exist only if any hosts were marked unusable. Match
3413 up by checking the IP address. */
3414
3415 case 'H':
3416 for (h = addrlist->host_list; h; h = h->next)
3417 {
3418 if (!h->address || Ustrcmp(h->address, ptr+2) != 0) continue;
3419 h->status = ptr[0];
3420 h->why = ptr[1];
3421 }
3422 ptr += 2;
3423 while (*ptr++);
3424 break;
3425
3426 /* Retry items are sent in a preceding R item for each address. This is
3427 kept separate to keep each message short enough to guarantee it won't
3428 be split in the pipe. Hopefully, in the majority of cases, there won't in
3429 fact be any retry items at all.
3430
3431 The complete set of retry items might include an item to delete a
3432 routing retry if there was a previous routing delay. However, routing
3433 retries are also used when a remote transport identifies an address error.
3434 In that case, there may also be an "add" item for the same key. Arrange
3435 that a "delete" item is dropped in favour of an "add" item. */
3436
3437 case 'R':
3438 if (!addr) goto ADDR_MISMATCH;
3439
3440 DEBUG(D_deliver|D_retry)
3441 debug_printf("reading retry information for %s from subprocess\n",
3442 ptr+1);
3443
3444 /* Cut out any "delete" items on the list. */
3445
3446 for (rp = &addr->retries; (r = *rp); rp = &r->next)
3447 if (Ustrcmp(r->key, ptr+1) == 0) /* Found item with same key */
3448 {
3449 if (!(r->flags & rf_delete)) break; /* It was not "delete" */
3450 *rp = r->next; /* Excise a delete item */
3451 DEBUG(D_deliver|D_retry)
3452 debug_printf(" existing delete item dropped\n");
3453 }
3454
3455 /* We want to add a delete item only if there is no non-delete item;
3456 however we still have to step ptr through the data. */
3457
3458 if (!r || !(*ptr & rf_delete))
3459 {
3460 r = store_get(sizeof(retry_item));
3461 r->next = addr->retries;
3462 addr->retries = r;
3463 r->flags = *ptr++;