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