Recast more internal string routines to use growable-strings
[exim.git] / src / src / deliver.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* See the file NOTICE for conditions of use and distribution. */
7
8 /* The main code for delivering a message. */
9
10
11 #include "exim.h"
12 #include "transports/smtp.h"
13 #include <sys/uio.h>
14 #include <assert.h>
15
16
17 /* Data block for keeping track of subprocesses for parallel remote
18 delivery. */
19
20 typedef struct pardata {
21 address_item *addrlist; /* chain of addresses */
22 address_item *addr; /* next address data expected for */
23 pid_t pid; /* subprocess pid */
24 int fd; /* pipe fd for getting result from subprocess */
25 int transport_count; /* returned transport count value */
26 BOOL done; /* no more data needed */
27 uschar *msg; /* error message */
28 uschar *return_path; /* return_path for these addresses */
29 } pardata;
30
31 /* Values for the process_recipients variable */
32
33 enum { RECIP_ACCEPT, RECIP_IGNORE, RECIP_DEFER,
34 RECIP_FAIL, RECIP_FAIL_FILTER, RECIP_FAIL_TIMEOUT,
35 RECIP_FAIL_LOOP};
36
37 /* Mutually recursive functions for marking addresses done. */
38
39 static void child_done(address_item *, uschar *);
40 static void address_done(address_item *, uschar *);
41
42 /* Table for turning base-62 numbers into binary */
43
44 static uschar tab62[] =
45 {0,1,2,3,4,5,6,7,8,9,0,0,0,0,0,0, /* 0-9 */
46 0,10,11,12,13,14,15,16,17,18,19,20, /* A-K */
47 21,22,23,24,25,26,27,28,29,30,31,32, /* L-W */
48 33,34,35, 0, 0, 0, 0, 0, /* X-Z */
49 0,36,37,38,39,40,41,42,43,44,45,46, /* a-k */
50 47,48,49,50,51,52,53,54,55,56,57,58, /* l-w */
51 59,60,61}; /* x-z */
52
53
54 /*************************************************
55 * Local static variables *
56 *************************************************/
57
58 /* addr_duplicate is global because it needs to be seen from the Envelope-To
59 writing code. */
60
61 static address_item *addr_defer = NULL;
62 static address_item *addr_failed = NULL;
63 static address_item *addr_fallback = NULL;
64 static address_item *addr_local = NULL;
65 static address_item *addr_new = NULL;
66 static address_item *addr_remote = NULL;
67 static address_item *addr_route = NULL;
68 static address_item *addr_succeed = NULL;
69 static address_item *addr_dsntmp = NULL;
70 static address_item *addr_senddsn = NULL;
71
72 static FILE *message_log = NULL;
73 static BOOL update_spool;
74 static BOOL remove_journal;
75 static int parcount = 0;
76 static pardata *parlist = NULL;
77 static int return_count;
78 static uschar *frozen_info = US"";
79 static uschar *used_return_path = NULL;
80
81
82
83 /*************************************************
84 * read as much as requested *
85 *************************************************/
86
87 /* The syscall read(2) doesn't always returns as much as we want. For
88 several reasons it might get less. (Not talking about signals, as syscalls
89 are restartable). When reading from a network or pipe connection the sender
90 might send in smaller chunks, with delays between these chunks. The read(2)
91 may return such a chunk.
92
93 The more the writer writes and the smaller the pipe between write and read is,
94 the more we get the chance of reading leass than requested. (See bug 2130)
95
96 This function read(2)s until we got all the data we *requested*.
97
98 Note: This function may block. Use it only if you're sure about the
99 amount of data you will get.
100
101 Argument:
102 fd the file descriptor to read from
103 buffer pointer to a buffer of size len
104 len the requested(!) amount of bytes
105
106 Returns: the amount of bytes read
107 */
108 static ssize_t
109 readn(int fd, void * buffer, size_t len)
110 {
111 void * next = buffer;
112 void * end = buffer + len;
113
114 while (next < end)
115 {
116 ssize_t got = read(fd, next, end - next);
117
118 /* I'm not sure if there are signals that can interrupt us,
119 for now I assume the worst */
120 if (got == -1 && errno == EINTR) continue;
121 if (got <= 0) return next - buffer;
122 next += got;
123 }
124
125 return len;
126 }
127
128
129 /*************************************************
130 * Make a new address item *
131 *************************************************/
132
133 /* This function gets the store and initializes with default values. The
134 transport_return value defaults to DEFER, so that any unexpected failure to
135 deliver does not wipe out the message. The default unique string is set to a
136 copy of the address, so that its domain can be lowercased.
137
138 Argument:
139 address the RFC822 address string
140 copy force a copy of the address
141
142 Returns: a pointer to an initialized address_item
143 */
144
145 address_item *
146 deliver_make_addr(uschar *address, BOOL copy)
147 {
148 address_item *addr = store_get(sizeof(address_item));
149 *addr = address_defaults;
150 if (copy) address = string_copy(address);
151 addr->address = address;
152 addr->unique = string_copy(address);
153 return addr;
154 }
155
156
157
158
159 /*************************************************
160 * Set expansion values for an address *
161 *************************************************/
162
163 /* Certain expansion variables are valid only when handling an address or
164 address list. This function sets them up or clears the values, according to its
165 argument.
166
167 Arguments:
168 addr the address in question, or NULL to clear values
169 Returns: nothing
170 */
171
172 void
173 deliver_set_expansions(address_item *addr)
174 {
175 if (!addr)
176 {
177 const uschar ***p = address_expansions;
178 while (*p) **p++ = NULL;
179 return;
180 }
181
182 /* Exactly what gets set depends on whether there is one or more addresses, and
183 what they contain. These first ones are always set, taking their values from
184 the first address. */
185
186 if (!addr->host_list)
187 {
188 deliver_host = deliver_host_address = US"";
189 deliver_host_port = 0;
190 }
191 else
192 {
193 deliver_host = addr->host_list->name;
194 deliver_host_address = addr->host_list->address;
195 deliver_host_port = addr->host_list->port;
196 }
197
198 deliver_recipients = addr;
199 deliver_address_data = addr->prop.address_data;
200 deliver_domain_data = addr->prop.domain_data;
201 deliver_localpart_data = addr->prop.localpart_data;
202
203 /* These may be unset for multiple addresses */
204
205 deliver_domain = addr->domain;
206 self_hostname = addr->self_hostname;
207
208 #ifdef EXPERIMENTAL_BRIGHTMAIL
209 bmi_deliver = 1; /* deliver by default */
210 bmi_alt_location = NULL;
211 bmi_base64_verdict = NULL;
212 bmi_base64_tracker_verdict = NULL;
213 #endif
214
215 /* If there's only one address we can set everything. */
216
217 if (!addr->next)
218 {
219 address_item *addr_orig;
220
221 deliver_localpart = addr->local_part;
222 deliver_localpart_prefix = addr->prefix;
223 deliver_localpart_suffix = addr->suffix;
224
225 for (addr_orig = addr; addr_orig->parent; addr_orig = addr_orig->parent) ;
226 deliver_domain_orig = addr_orig->domain;
227
228 /* Re-instate any prefix and suffix in the original local part. In all
229 normal cases, the address will have a router associated with it, and we can
230 choose the caseful or caseless version accordingly. However, when a system
231 filter sets up a pipe, file, or autoreply delivery, no router is involved.
232 In this case, though, there won't be any prefix or suffix to worry about. */
233
234 deliver_localpart_orig = !addr_orig->router
235 ? addr_orig->local_part
236 : addr_orig->router->caseful_local_part
237 ? addr_orig->cc_local_part
238 : addr_orig->lc_local_part;
239
240 /* If there's a parent, make its domain and local part available, and if
241 delivering to a pipe or file, or sending an autoreply, get the local
242 part from the parent. For pipes and files, put the pipe or file string
243 into address_pipe and address_file. */
244
245 if (addr->parent)
246 {
247 deliver_domain_parent = addr->parent->domain;
248 deliver_localpart_parent = !addr->parent->router
249 ? addr->parent->local_part
250 : addr->parent->router->caseful_local_part
251 ? addr->parent->cc_local_part
252 : addr->parent->lc_local_part;
253
254 /* File deliveries have their own flag because they need to be picked out
255 as special more often. */
256
257 if (testflag(addr, af_pfr))
258 {
259 if (testflag(addr, af_file)) address_file = addr->local_part;
260 else if (deliver_localpart[0] == '|') address_pipe = addr->local_part;
261 deliver_localpart = addr->parent->local_part;
262 deliver_localpart_prefix = addr->parent->prefix;
263 deliver_localpart_suffix = addr->parent->suffix;
264 }
265 }
266
267 #ifdef EXPERIMENTAL_BRIGHTMAIL
268 /* Set expansion variables related to Brightmail AntiSpam */
269 bmi_base64_verdict = bmi_get_base64_verdict(deliver_localpart_orig, deliver_domain_orig);
270 bmi_base64_tracker_verdict = bmi_get_base64_tracker_verdict(bmi_base64_verdict);
271 /* get message delivery status (0 - don't deliver | 1 - deliver) */
272 bmi_deliver = bmi_get_delivery_status(bmi_base64_verdict);
273 /* if message is to be delivered, get eventual alternate location */
274 if (bmi_deliver == 1)
275 bmi_alt_location = bmi_get_alt_location(bmi_base64_verdict);
276 #endif
277
278 }
279
280 /* For multiple addresses, don't set local part, and leave the domain and
281 self_hostname set only if it is the same for all of them. It is possible to
282 have multiple pipe and file addresses, but only when all addresses have routed
283 to the same pipe or file. */
284
285 else
286 {
287 address_item *addr2;
288 if (testflag(addr, af_pfr))
289 {
290 if (testflag(addr, af_file)) address_file = addr->local_part;
291 else if (addr->local_part[0] == '|') address_pipe = addr->local_part;
292 }
293 for (addr2 = addr->next; addr2; addr2 = addr2->next)
294 {
295 if (deliver_domain && Ustrcmp(deliver_domain, addr2->domain) != 0)
296 deliver_domain = NULL;
297 if ( self_hostname
298 && ( !addr2->self_hostname
299 || Ustrcmp(self_hostname, addr2->self_hostname) != 0
300 ) )
301 self_hostname = NULL;
302 if (!deliver_domain && !self_hostname) break;
303 }
304 }
305 }
306
307
308
309
310 /*************************************************
311 * Open a msglog file *
312 *************************************************/
313
314 /* This function is used both for normal message logs, and for files in the
315 msglog directory that are used to catch output from pipes. Try to create the
316 directory if it does not exist. From release 4.21, normal message logs should
317 be created when the message is received.
318
319 Called from deliver_message(), can be operating as root.
320
321 Argument:
322 filename the file name
323 mode the mode required
324 error used for saying what failed
325
326 Returns: a file descriptor, or -1 (with errno set)
327 */
328
329 static int
330 open_msglog_file(uschar *filename, int mode, uschar **error)
331 {
332 int fd, i;
333
334 for (i = 2; i > 0; i--)
335 {
336 fd = Uopen(filename,
337 #ifdef O_CLOEXEC
338 O_CLOEXEC |
339 #endif
340 #ifdef O_NOFOLLOW
341 O_NOFOLLOW |
342 #endif
343 O_WRONLY|O_APPEND|O_CREAT, mode);
344 if (fd >= 0)
345 {
346 /* Set the close-on-exec flag and change the owner to the exim uid/gid (this
347 function is called as root). Double check the mode, because the group setting
348 doesn't always get set automatically. */
349
350 #ifndef O_CLOEXEC
351 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
352 #endif
353 if (fchown(fd, exim_uid, exim_gid) < 0)
354 {
355 *error = US"chown";
356 return -1;
357 }
358 if (fchmod(fd, mode) < 0)
359 {
360 *error = US"chmod";
361 return -1;
362 }
363 return fd;
364 }
365 if (errno != ENOENT)
366 break;
367
368 (void)directory_make(spool_directory,
369 spool_sname(US"msglog", message_subdir),
370 MSGLOG_DIRECTORY_MODE, TRUE);
371 }
372
373 *error = US"create";
374 return -1;
375 }
376
377
378
379
380 /*************************************************
381 * Write to msglog if required *
382 *************************************************/
383
384 /* Write to the message log, if configured. This function may also be called
385 from transports.
386
387 Arguments:
388 format a string format
389
390 Returns: nothing
391 */
392
393 void
394 deliver_msglog(const char *format, ...)
395 {
396 va_list ap;
397 if (!message_logs) return;
398 va_start(ap, format);
399 vfprintf(message_log, format, ap);
400 fflush(message_log);
401 va_end(ap);
402 }
403
404
405
406
407 /*************************************************
408 * Replicate status for batch *
409 *************************************************/
410
411 /* When a transport handles a batch of addresses, it may treat them
412 individually, or it may just put the status in the first one, and return FALSE,
413 requesting that the status be copied to all the others externally. This is the
414 replication function. As well as the status, it copies the transport pointer,
415 which may have changed if appendfile passed the addresses on to a different
416 transport.
417
418 Argument: pointer to the first address in a chain
419 Returns: nothing
420 */
421
422 static void
423 replicate_status(address_item *addr)
424 {
425 address_item *addr2;
426 for (addr2 = addr->next; addr2; addr2 = addr2->next)
427 {
428 addr2->transport = addr->transport;
429 addr2->transport_return = addr->transport_return;
430 addr2->basic_errno = addr->basic_errno;
431 addr2->more_errno = addr->more_errno;
432 addr2->delivery_usec = addr->delivery_usec;
433 addr2->special_action = addr->special_action;
434 addr2->message = addr->message;
435 addr2->user_message = addr->user_message;
436 }
437 }
438
439
440
441 /*************************************************
442 * Compare lists of hosts *
443 *************************************************/
444
445 /* This function is given two pointers to chains of host items, and it yields
446 TRUE if the lists refer to the same hosts in the same order, except that
447
448 (1) Multiple hosts with the same non-negative MX values are permitted to appear
449 in different orders. Round-robinning nameservers can cause this to happen.
450
451 (2) Multiple hosts with the same negative MX values less than MX_NONE are also
452 permitted to appear in different orders. This is caused by randomizing
453 hosts lists.
454
455 This enables Exim to use a single SMTP transaction for sending to two entirely
456 different domains that happen to end up pointing at the same hosts.
457
458 Arguments:
459 one points to the first host list
460 two points to the second host list
461
462 Returns: TRUE if the lists refer to the same host set
463 */
464
465 static BOOL
466 same_hosts(host_item *one, host_item *two)
467 {
468 while (one && two)
469 {
470 if (Ustrcmp(one->name, two->name) != 0)
471 {
472 int mx = one->mx;
473 host_item *end_one = one;
474 host_item *end_two = two;
475
476 /* Batch up only if there was no MX and the list was not randomized */
477
478 if (mx == MX_NONE) return FALSE;
479
480 /* Find the ends of the shortest sequence of identical MX values */
481
482 while ( end_one->next && end_one->next->mx == mx
483 && end_two->next && end_two->next->mx == mx)
484 {
485 end_one = end_one->next;
486 end_two = end_two->next;
487 }
488
489 /* If there aren't any duplicates, there's no match. */
490
491 if (end_one == one) return FALSE;
492
493 /* For each host in the 'one' sequence, check that it appears in the 'two'
494 sequence, returning FALSE if not. */
495
496 for (;;)
497 {
498 host_item *hi;
499 for (hi = two; hi != end_two->next; hi = hi->next)
500 if (Ustrcmp(one->name, hi->name) == 0) break;
501 if (hi == end_two->next) return FALSE;
502 if (one == end_one) break;
503 one = one->next;
504 }
505
506 /* All the hosts in the 'one' sequence were found in the 'two' sequence.
507 Ensure both are pointing at the last host, and carry on as for equality. */
508
509 two = end_two;
510 }
511
512 /* if the names matched but ports do not, mismatch */
513 else if (one->port != two->port)
514 return FALSE;
515
516 /* Hosts matched */
517
518 one = one->next;
519 two = two->next;
520 }
521
522 /* True if both are NULL */
523
524 return (one == two);
525 }
526
527
528
529 /*************************************************
530 * Compare header lines *
531 *************************************************/
532
533 /* This function is given two pointers to chains of header items, and it yields
534 TRUE if they are the same header texts in the same order.
535
536 Arguments:
537 one points to the first header list
538 two points to the second header list
539
540 Returns: TRUE if the lists refer to the same header set
541 */
542
543 static BOOL
544 same_headers(header_line *one, header_line *two)
545 {
546 for (;; one = one->next, two = two->next)
547 {
548 if (one == two) return TRUE; /* Includes the case where both NULL */
549 if (!one || !two) return FALSE;
550 if (Ustrcmp(one->text, two->text) != 0) return FALSE;
551 }
552 }
553
554
555
556 /*************************************************
557 * Compare string settings *
558 *************************************************/
559
560 /* This function is given two pointers to strings, and it returns
561 TRUE if they are the same pointer, or if the two strings are the same.
562
563 Arguments:
564 one points to the first string
565 two points to the second string
566
567 Returns: TRUE or FALSE
568 */
569
570 static BOOL
571 same_strings(uschar *one, uschar *two)
572 {
573 if (one == two) return TRUE; /* Includes the case where both NULL */
574 if (!one || !two) return FALSE;
575 return (Ustrcmp(one, two) == 0);
576 }
577
578
579
580 /*************************************************
581 * Compare uid/gid for addresses *
582 *************************************************/
583
584 /* This function is given a transport and two addresses. It yields TRUE if the
585 uid/gid/initgroups settings for the two addresses are going to be the same when
586 they are delivered.
587
588 Arguments:
589 tp the transort
590 addr1 the first address
591 addr2 the second address
592
593 Returns: TRUE or FALSE
594 */
595
596 static BOOL
597 same_ugid(transport_instance *tp, address_item *addr1, address_item *addr2)
598 {
599 if ( !tp->uid_set && !tp->expand_uid
600 && !tp->deliver_as_creator
601 && ( testflag(addr1, af_uid_set) != testflag(addr2, af_gid_set)
602 || ( testflag(addr1, af_uid_set)
603 && ( addr1->uid != addr2->uid
604 || testflag(addr1, af_initgroups) != testflag(addr2, af_initgroups)
605 ) ) ) )
606 return FALSE;
607
608 if ( !tp->gid_set && !tp->expand_gid
609 && ( testflag(addr1, af_gid_set) != testflag(addr2, af_gid_set)
610 || ( testflag(addr1, af_gid_set)
611 && addr1->gid != addr2->gid
612 ) ) )
613 return FALSE;
614
615 return TRUE;
616 }
617
618
619
620
621 /*************************************************
622 * Record that an address is complete *
623 *************************************************/
624
625 /* This function records that an address is complete. This is straightforward
626 for most addresses, where the unique address is just the full address with the
627 domain lower cased. For homonyms (addresses that are the same as one of their
628 ancestors) their are complications. Their unique addresses have \x\ prepended
629 (where x = 0, 1, 2...), so that de-duplication works correctly for siblings and
630 cousins.
631
632 Exim used to record the unique addresses of homonyms as "complete". This,
633 however, fails when the pattern of redirection varies over time (e.g. if taking
634 unseen copies at only some times of day) because the prepended numbers may vary
635 from one delivery run to the next. This problem is solved by never recording
636 prepended unique addresses as complete. Instead, when a homonymic address has
637 actually been delivered via a transport, we record its basic unique address
638 followed by the name of the transport. This is checked in subsequent delivery
639 runs whenever an address is routed to a transport.
640
641 If the completed address is a top-level one (has no parent, which means it
642 cannot be homonymic) we also add the original address to the non-recipients
643 tree, so that it gets recorded in the spool file and therefore appears as
644 "done" in any spool listings. The original address may differ from the unique
645 address in the case of the domain.
646
647 Finally, this function scans the list of duplicates, marks as done any that
648 match this address, and calls child_done() for their ancestors.
649
650 Arguments:
651 addr address item that has been completed
652 now current time as a string
653
654 Returns: nothing
655 */
656
657 static void
658 address_done(address_item *addr, uschar *now)
659 {
660 address_item *dup;
661
662 update_spool = TRUE; /* Ensure spool gets updated */
663
664 /* Top-level address */
665
666 if (!addr->parent)
667 {
668 tree_add_nonrecipient(addr->unique);
669 tree_add_nonrecipient(addr->address);
670 }
671
672 /* Homonymous child address */
673
674 else if (testflag(addr, af_homonym))
675 {
676 if (addr->transport)
677 tree_add_nonrecipient(
678 string_sprintf("%s/%s", addr->unique + 3, addr->transport->name));
679 }
680
681 /* Non-homonymous child address */
682
683 else tree_add_nonrecipient(addr->unique);
684
685 /* Check the list of duplicate addresses and ensure they are now marked
686 done as well. */
687
688 for (dup = addr_duplicate; dup; dup = dup->next)
689 if (Ustrcmp(addr->unique, dup->unique) == 0)
690 {
691 tree_add_nonrecipient(dup->unique);
692 child_done(dup, now);
693 }
694 }
695
696
697
698
699 /*************************************************
700 * Decrease counts in parents and mark done *
701 *************************************************/
702
703 /* This function is called when an address is complete. If there is a parent
704 address, its count of children is decremented. If there are still other
705 children outstanding, the function exits. Otherwise, if the count has become
706 zero, address_done() is called to mark the parent and its duplicates complete.
707 Then loop for any earlier ancestors.
708
709 Arguments:
710 addr points to the completed address item
711 now the current time as a string, for writing to the message log
712
713 Returns: nothing
714 */
715
716 static void
717 child_done(address_item *addr, uschar *now)
718 {
719 address_item *aa;
720 while (addr->parent)
721 {
722 addr = addr->parent;
723 if (--addr->child_count > 0) return; /* Incomplete parent */
724 address_done(addr, now);
725
726 /* Log the completion of all descendents only when there is no ancestor with
727 the same original address. */
728
729 for (aa = addr->parent; aa; aa = aa->parent)
730 if (Ustrcmp(aa->address, addr->address) == 0) break;
731 if (aa) continue;
732
733 deliver_msglog("%s %s: children all complete\n", now, addr->address);
734 DEBUG(D_deliver) debug_printf("%s: children all complete\n", addr->address);
735 }
736 }
737
738
739
740 /*************************************************
741 * Delivery logging support functions *
742 *************************************************/
743
744 /* The LOGGING() checks in d_log_interface() are complicated for backwards
745 compatibility. When outgoing interface logging was originally added, it was
746 conditional on just incoming_interface (which is off by default). The
747 outgoing_interface option is on by default to preserve this behaviour, but
748 you can enable incoming_interface and disable outgoing_interface to get I=
749 fields on incoming lines only.
750
751 Arguments:
752 g The log line
753 addr The address to be logged
754
755 Returns: New value for s
756 */
757
758 static gstring *
759 d_log_interface(gstring * g)
760 {
761 if (LOGGING(incoming_interface) && LOGGING(outgoing_interface)
762 && sending_ip_address)
763 {
764 g = string_fmt_append(g, " I=[%s]", sending_ip_address);
765 if (LOGGING(outgoing_port))
766 g = string_fmt_append(g, "%d", sending_port);
767 }
768 return g;
769 }
770
771
772
773 static gstring *
774 d_hostlog(gstring * g, address_item * addr)
775 {
776 host_item * h = addr->host_used;
777
778 g = string_append(g, 2, US" H=", h->name);
779
780 if (LOGGING(dnssec) && h->dnssec == DS_YES)
781 g = string_catn(g, US" DS", 3);
782
783 g = string_append(g, 3, US" [", h->address, US"]");
784
785 if (LOGGING(outgoing_port))
786 g = string_fmt_append(g, ":%d", h->port);
787
788 #ifdef SUPPORT_SOCKS
789 if (LOGGING(proxy) && proxy_local_address)
790 {
791 g = string_append(g, 3, US" PRX=[", proxy_local_address, US"]");
792 if (LOGGING(outgoing_port))
793 g = string_fmt_append(g, ":%d", proxy_local_port);
794 }
795 #endif
796
797 g = d_log_interface(g);
798
799 if (testflag(addr, af_tcp_fastopen))
800 g = string_catn(g, US" TFO*", testflag(addr, af_tcp_fastopen_data) ? 5 : 4);
801
802 return g;
803 }
804
805
806
807
808
809 #ifdef SUPPORT_TLS
810 static gstring *
811 d_tlslog(gstring * s, address_item * addr)
812 {
813 if (LOGGING(tls_cipher) && addr->cipher)
814 s = string_append(s, 2, US" X=", addr->cipher);
815 if (LOGGING(tls_certificate_verified) && addr->cipher)
816 s = string_append(s, 2, US" CV=",
817 testflag(addr, af_cert_verified)
818 ?
819 #ifdef SUPPORT_DANE
820 testflag(addr, af_dane_verified)
821 ? "dane"
822 :
823 #endif
824 "yes"
825 : "no");
826 if (LOGGING(tls_peerdn) && addr->peerdn)
827 s = string_append(s, 3, US" DN=\"", string_printing(addr->peerdn), US"\"");
828 return s;
829 }
830 #endif
831
832
833
834
835 #ifndef DISABLE_EVENT
836 uschar *
837 event_raise(uschar * action, const uschar * event, uschar * ev_data)
838 {
839 uschar * s;
840 if (action)
841 {
842 DEBUG(D_deliver)
843 debug_printf("Event(%s): event_action=|%s| delivery_IP=%s\n",
844 event,
845 action, deliver_host_address);
846
847 event_name = event;
848 event_data = ev_data;
849
850 if (!(s = expand_string(action)) && *expand_string_message)
851 log_write(0, LOG_MAIN|LOG_PANIC,
852 "failed to expand event_action %s in %s: %s\n",
853 event, transport_name ? transport_name : US"main", expand_string_message);
854
855 event_name = event_data = NULL;
856
857 /* If the expansion returns anything but an empty string, flag for
858 the caller to modify his normal processing
859 */
860 if (s && *s)
861 {
862 DEBUG(D_deliver)
863 debug_printf("Event(%s): event_action returned \"%s\"\n", event, s);
864 return s;
865 }
866 }
867 return NULL;
868 }
869
870 void
871 msg_event_raise(const uschar * event, const address_item * addr)
872 {
873 const uschar * save_domain = deliver_domain;
874 uschar * save_local = deliver_localpart;
875 const uschar * save_host = deliver_host;
876 const uschar * save_address = deliver_host_address;
877 const int save_port = deliver_host_port;
878
879 router_name = addr->router ? addr->router->name : NULL;
880 deliver_domain = addr->domain;
881 deliver_localpart = addr->local_part;
882 deliver_host = addr->host_used ? addr->host_used->name : NULL;
883
884 if (!addr->transport)
885 {
886 if (Ustrcmp(event, "msg:fail:delivery") == 0)
887 {
888 /* An address failed with no transport involved. This happens when
889 a filter was used which triggered a fail command (in such a case
890 a transport isn't needed). Convert it to an internal fail event. */
891
892 (void) event_raise(event_action, US"msg:fail:internal", addr->message);
893 }
894 }
895 else
896 {
897 transport_name = addr->transport->name;
898
899 (void) event_raise(addr->transport->event_action, event,
900 addr->host_used
901 || Ustrcmp(addr->transport->driver_name, "smtp") == 0
902 || Ustrcmp(addr->transport->driver_name, "lmtp") == 0
903 || Ustrcmp(addr->transport->driver_name, "autoreply") == 0
904 ? addr->message : NULL);
905 }
906
907 deliver_host_port = save_port;
908 deliver_host_address = save_address;
909 deliver_host = save_host;
910 deliver_localpart = save_local;
911 deliver_domain = save_domain;
912 router_name = transport_name = NULL;
913 }
914 #endif /*DISABLE_EVENT*/
915
916
917
918 /******************************************************************************/
919
920
921 /*************************************************
922 * Generate local prt for logging *
923 *************************************************/
924
925 /* This function is a subroutine for use in string_log_address() below.
926
927 Arguments:
928 addr the address being logged
929 yield the current dynamic buffer pointer
930
931 Returns: the new value of the buffer pointer
932 */
933
934 static gstring *
935 string_get_localpart(address_item * addr, gstring * yield)
936 {
937 uschar * s;
938
939 s = addr->prefix;
940 if (testflag(addr, af_include_affixes) && s)
941 {
942 #ifdef SUPPORT_I18N
943 if (testflag(addr, af_utf8_downcvt))
944 s = string_localpart_utf8_to_alabel(s, NULL);
945 #endif
946 yield = string_cat(yield, s);
947 }
948
949 s = addr->local_part;
950 #ifdef SUPPORT_I18N
951 if (testflag(addr, af_utf8_downcvt))
952 s = string_localpart_utf8_to_alabel(s, NULL);
953 #endif
954 yield = string_cat(yield, s);
955
956 s = addr->suffix;
957 if (testflag(addr, af_include_affixes) && s)
958 {
959 #ifdef SUPPORT_I18N
960 if (testflag(addr, af_utf8_downcvt))
961 s = string_localpart_utf8_to_alabel(s, NULL);
962 #endif
963 yield = string_cat(yield, s);
964 }
965
966 return yield;
967 }
968
969
970 /*************************************************
971 * Generate log address list *
972 *************************************************/
973
974 /* This function generates a list consisting of an address and its parents, for
975 use in logging lines. For saved onetime aliased addresses, the onetime parent
976 field is used. If the address was delivered by a transport with rcpt_include_
977 affixes set, the af_include_affixes bit will be set in the address. In that
978 case, we include the affixes here too.
979
980 Arguments:
981 g points to growing-string struct
982 addr bottom (ultimate) address
983 all_parents if TRUE, include all parents
984 success TRUE for successful delivery
985
986 Returns: a growable string in dynamic store
987 */
988
989 static gstring *
990 string_log_address(gstring * g,
991 address_item *addr, BOOL all_parents, BOOL success)
992 {
993 BOOL add_topaddr = TRUE;
994 address_item *topaddr;
995
996 /* Find the ultimate parent */
997
998 for (topaddr = addr; topaddr->parent; topaddr = topaddr->parent) ;
999
1000 /* We start with just the local part for pipe, file, and reply deliveries, and
1001 for successful local deliveries from routers that have the log_as_local flag
1002 set. File deliveries from filters can be specified as non-absolute paths in
1003 cases where the transport is going to complete the path. If there is an error
1004 before this happens (expansion failure) the local part will not be updated, and
1005 so won't necessarily look like a path. Add extra text for this case. */
1006
1007 if ( testflag(addr, af_pfr)
1008 || ( success
1009 && addr->router && addr->router->log_as_local
1010 && addr->transport && addr->transport->info->local
1011 ) )
1012 {
1013 if (testflag(addr, af_file) && addr->local_part[0] != '/')
1014 g = string_catn(g, CUS"save ", 5);
1015 g = string_get_localpart(addr, g);
1016 }
1017
1018 /* Other deliveries start with the full address. It we have split it into local
1019 part and domain, use those fields. Some early failures can happen before the
1020 splitting is done; in those cases use the original field. */
1021
1022 else
1023 {
1024 uschar * cmp = g->s + g->ptr;
1025
1026 if (addr->local_part)
1027 {
1028 const uschar * s;
1029 g = string_get_localpart(addr, g);
1030 g = string_catn(g, US"@", 1);
1031 s = addr->domain;
1032 #ifdef SUPPORT_I18N
1033 if (testflag(addr, af_utf8_downcvt))
1034 s = string_localpart_utf8_to_alabel(s, NULL);
1035 #endif
1036 g = string_cat(g, s);
1037 }
1038 else
1039 g = string_cat(g, addr->address);
1040
1041 /* If the address we are going to print is the same as the top address,
1042 and all parents are not being included, don't add on the top address. First
1043 of all, do a caseless comparison; if this succeeds, do a caseful comparison
1044 on the local parts. */
1045
1046 string_from_gstring(g); /* ensure nul-terminated */
1047 if ( strcmpic(cmp, topaddr->address) == 0
1048 && Ustrncmp(cmp, topaddr->address, Ustrchr(cmp, '@') - cmp) == 0
1049 && !addr->onetime_parent
1050 && (!all_parents || !addr->parent || addr->parent == topaddr)
1051 )
1052 add_topaddr = FALSE;
1053 }
1054
1055 /* If all parents are requested, or this is a local pipe/file/reply, and
1056 there is at least one intermediate parent, show it in brackets, and continue
1057 with all of them if all are wanted. */
1058
1059 if ( (all_parents || testflag(addr, af_pfr))
1060 && addr->parent
1061 && addr->parent != topaddr)
1062 {
1063 uschar *s = US" (";
1064 address_item *addr2;
1065 for (addr2 = addr->parent; addr2 != topaddr; addr2 = addr2->parent)
1066 {
1067 g = string_catn(g, s, 2);
1068 g = string_cat (g, addr2->address);
1069 if (!all_parents) break;
1070 s = US", ";
1071 }
1072 g = string_catn(g, US")", 1);
1073 }
1074
1075 /* Add the top address if it is required */
1076
1077 if (add_topaddr)
1078 g = string_append(g, 3,
1079 US" <",
1080 addr->onetime_parent ? addr->onetime_parent : topaddr->address,
1081 US">");
1082
1083 return g;
1084 }
1085
1086
1087
1088 void
1089 timesince(struct timeval * diff, struct timeval * then)
1090 {
1091 gettimeofday(diff, NULL);
1092 diff->tv_sec -= then->tv_sec;
1093 if ((diff->tv_usec -= then->tv_usec) < 0)
1094 {
1095 diff->tv_sec--;
1096 diff->tv_usec += 1000*1000;
1097 }
1098 }
1099
1100
1101
1102 uschar *
1103 string_timediff(struct timeval * diff)
1104 {
1105 static uschar buf[sizeof("0.000s")];
1106
1107 if (diff->tv_sec >= 5 || !LOGGING(millisec))
1108 return readconf_printtime((int)diff->tv_sec);
1109
1110 sprintf(CS buf, "%u.%03us", (uint)diff->tv_sec, (uint)diff->tv_usec/1000);
1111 return buf;
1112 }
1113
1114
1115 uschar *
1116 string_timesince(struct timeval * then)
1117 {
1118 struct timeval diff;
1119
1120 timesince(&diff, then);
1121 return string_timediff(&diff);
1122 }
1123
1124 /******************************************************************************/
1125
1126
1127
1128 /* If msg is NULL this is a delivery log and logchar is used. Otherwise
1129 this is a nonstandard call; no two-character delivery flag is written
1130 but sender-host and sender are prefixed and "msg" is inserted in the log line.
1131
1132 Arguments:
1133 flags passed to log_write()
1134 */
1135 void
1136 delivery_log(int flags, address_item * addr, int logchar, uschar * msg)
1137 {
1138 gstring * g; /* Used for a temporary, expanding buffer, for building log lines */
1139 void * reset_point; /* released afterwards. */
1140
1141 /* Log the delivery on the main log. We use an extensible string to build up
1142 the log line, and reset the store afterwards. Remote deliveries should always
1143 have a pointer to the host item that succeeded; local deliveries can have a
1144 pointer to a single host item in their host list, for use by the transport. */
1145
1146 #ifndef DISABLE_EVENT
1147 /* presume no successful remote delivery */
1148 lookup_dnssec_authenticated = NULL;
1149 #endif
1150
1151 g = reset_point = string_get(256);
1152
1153 if (msg)
1154 g = string_append(g, 2, host_and_ident(TRUE), US" ");
1155 else
1156 {
1157 g->s[0] = logchar; g->ptr = 1;
1158 g = string_catn(g, US"> ", 2);
1159 }
1160 g = string_log_address(g, addr, LOGGING(all_parents), TRUE);
1161
1162 if (LOGGING(sender_on_delivery) || msg)
1163 g = string_append(g, 3, US" F=<",
1164 #ifdef SUPPORT_I18N
1165 testflag(addr, af_utf8_downcvt)
1166 ? string_address_utf8_to_alabel(sender_address, NULL)
1167 :
1168 #endif
1169 sender_address,
1170 US">");
1171
1172 if (*queue_name)
1173 g = string_append(g, 2, US" Q=", queue_name);
1174
1175 #ifdef EXPERIMENTAL_SRS
1176 if(addr->prop.srs_sender)
1177 g = string_append(g, 3, US" SRS=<", addr->prop.srs_sender, US">");
1178 #endif
1179
1180 /* You might think that the return path must always be set for a successful
1181 delivery; indeed, I did for some time, until this statement crashed. The case
1182 when it is not set is for a delivery to /dev/null which is optimised by not
1183 being run at all. */
1184
1185 if (used_return_path && LOGGING(return_path_on_delivery))
1186 g = string_append(g, 3, US" P=<", used_return_path, US">");
1187
1188 if (msg)
1189 g = string_append(g, 2, US" ", msg);
1190
1191 /* For a delivery from a system filter, there may not be a router */
1192 if (addr->router)
1193 g = string_append(g, 2, US" R=", addr->router->name);
1194
1195 g = string_append(g, 2, US" T=", addr->transport->name);
1196
1197 if (LOGGING(delivery_size))
1198 g = string_fmt_append(g, " S=%d", transport_count);
1199
1200 /* Local delivery */
1201
1202 if (addr->transport->info->local)
1203 {
1204 if (addr->host_list)
1205 g = string_append(g, 2, US" H=", addr->host_list->name);
1206 g = d_log_interface(g);
1207 if (addr->shadow_message)
1208 g = string_cat(g, addr->shadow_message);
1209 }
1210
1211 /* Remote delivery */
1212
1213 else
1214 {
1215 if (addr->host_used)
1216 {
1217 g = d_hostlog(g, addr);
1218 if (continue_sequence > 1)
1219 g = string_catn(g, US"*", 1);
1220
1221 #ifndef DISABLE_EVENT
1222 deliver_host_address = addr->host_used->address;
1223 deliver_host_port = addr->host_used->port;
1224 deliver_host = addr->host_used->name;
1225
1226 /* DNS lookup status */
1227 lookup_dnssec_authenticated = addr->host_used->dnssec==DS_YES ? US"yes"
1228 : addr->host_used->dnssec==DS_NO ? US"no"
1229 : NULL;
1230 #endif
1231 }
1232
1233 #ifdef SUPPORT_TLS
1234 g = d_tlslog(g, addr);
1235 #endif
1236
1237 if (addr->authenticator)
1238 {
1239 g = string_append(g, 2, US" A=", addr->authenticator);
1240 if (addr->auth_id)
1241 {
1242 g = string_append(g, 2, US":", addr->auth_id);
1243 if (LOGGING(smtp_mailauth) && addr->auth_sndr)
1244 g = string_append(g, 2, US":", addr->auth_sndr);
1245 }
1246 }
1247
1248 if (LOGGING(pipelining))
1249 {
1250 if (testflag(addr, af_pipelining))
1251 g = string_catn(g, US" L", 2);
1252 #ifdef EXPERIMENTAL_PIPE_CONNECT
1253 if (testflag(addr, af_early_pipe))
1254 g = string_catn(g, US"*", 1);
1255 #endif
1256 }
1257
1258 #ifndef DISABLE_PRDR
1259 if (testflag(addr, af_prdr_used))
1260 g = string_catn(g, US" PRDR", 5);
1261 #endif
1262
1263 if (testflag(addr, af_chunking_used))
1264 g = string_catn(g, US" K", 2);
1265 }
1266
1267 /* confirmation message (SMTP (host_used) and LMTP (driver_name)) */
1268
1269 if ( LOGGING(smtp_confirmation)
1270 && addr->message
1271 && (addr->host_used || Ustrcmp(addr->transport->driver_name, "lmtp") == 0)
1272 )
1273 {
1274 unsigned i;
1275 unsigned lim = big_buffer_size < 1024 ? big_buffer_size : 1024;
1276 uschar *p = big_buffer;
1277 uschar *ss = addr->message;
1278 *p++ = '\"';
1279 for (i = 0; i < lim && ss[i] != 0; i++) /* limit logged amount */
1280 {
1281 if (ss[i] == '\"' || ss[i] == '\\') *p++ = '\\'; /* quote \ and " */
1282 *p++ = ss[i];
1283 }
1284 *p++ = '\"';
1285 *p = 0;
1286 g = string_append(g, 2, US" C=", big_buffer);
1287 }
1288
1289 /* Time on queue and actual time taken to deliver */
1290
1291 if (LOGGING(queue_time))
1292 g = string_append(g, 2, US" QT=",
1293 string_timesince(&received_time));
1294
1295 if (LOGGING(deliver_time))
1296 {
1297 struct timeval diff = {.tv_sec = addr->more_errno, .tv_usec = addr->delivery_usec};
1298 g = string_append(g, 2, US" DT=", string_timediff(&diff));
1299 }
1300
1301 /* string_cat() always leaves room for the terminator. Release the
1302 store we used to build the line after writing it. */
1303
1304 log_write(0, flags, "%s", string_from_gstring(g));
1305
1306 #ifndef DISABLE_EVENT
1307 if (!msg) msg_event_raise(US"msg:delivery", addr);
1308 #endif
1309
1310 store_reset(reset_point);
1311 return;
1312 }
1313
1314
1315
1316 static void
1317 deferral_log(address_item * addr, uschar * now,
1318 int logflags, uschar * driver_name, uschar * driver_kind)
1319 {
1320 gstring * g;
1321 void * reset_point;
1322
1323 /* Build up the line that is used for both the message log and the main
1324 log. */
1325
1326 g = reset_point = string_get(256);
1327
1328 /* Create the address string for logging. Must not do this earlier, because
1329 an OK result may be changed to FAIL when a pipe returns text. */
1330
1331 g = string_log_address(g, addr, LOGGING(all_parents), FALSE);
1332
1333 if (*queue_name)
1334 g = string_append(g, 2, US" Q=", queue_name);
1335
1336 /* Either driver_name contains something and driver_kind contains
1337 " router" or " transport" (note the leading space), or driver_name is
1338 a null string and driver_kind contains "routing" without the leading
1339 space, if all routing has been deferred. When a domain has been held,
1340 so nothing has been done at all, both variables contain null strings. */
1341
1342 if (driver_name)
1343 {
1344 if (driver_kind[1] == 't' && addr->router)
1345 g = string_append(g, 2, US" R=", addr->router->name);
1346 g = string_fmt_append(g, " %c=%s", toupper(driver_kind[1]), driver_name);
1347 }
1348 else if (driver_kind)
1349 g = string_append(g, 2, US" ", driver_kind);
1350
1351 g = string_fmt_append(g, " defer (%d)", addr->basic_errno);
1352
1353 if (addr->basic_errno > 0)
1354 g = string_append(g, 2, US": ",
1355 US strerror(addr->basic_errno));
1356
1357 if (addr->host_used)
1358 {
1359 g = string_append(g, 5,
1360 US" H=", addr->host_used->name,
1361 US" [", addr->host_used->address, US"]");
1362 if (LOGGING(outgoing_port))
1363 {
1364 int port = addr->host_used->port;
1365 g = string_fmt_append(g, ":%d", port == PORT_NONE ? 25 : port);
1366 }
1367 }
1368
1369 if (addr->message)
1370 g = string_append(g, 2, US": ", addr->message);
1371
1372 (void) string_from_gstring(g);
1373
1374 /* Log the deferment in the message log, but don't clutter it
1375 up with retry-time defers after the first delivery attempt. */
1376
1377 if (f.deliver_firsttime || addr->basic_errno > ERRNO_RETRY_BASE)
1378 deliver_msglog("%s %s\n", now, g->s);
1379
1380 /* Write the main log and reset the store.
1381 For errors of the type "retry time not reached" (also remotes skipped
1382 on queue run), logging is controlled by L_retry_defer. Note that this kind
1383 of error number is negative, and all the retry ones are less than any
1384 others. */
1385
1386
1387 log_write(addr->basic_errno <= ERRNO_RETRY_BASE ? L_retry_defer : 0, logflags,
1388 "== %s", g->s);
1389
1390 store_reset(reset_point);
1391 return;
1392 }
1393
1394
1395
1396 static void
1397 failure_log(address_item * addr, uschar * driver_kind, uschar * now)
1398 {
1399 void * reset_point;
1400 gstring * g = reset_point = string_get(256);
1401
1402 #ifndef DISABLE_EVENT
1403 /* Message failures for which we will send a DSN get their event raised
1404 later so avoid doing it here. */
1405
1406 if ( !addr->prop.ignore_error
1407 && !(addr->dsn_flags & (rf_dsnflags & ~rf_notify_failure))
1408 )
1409 msg_event_raise(US"msg:fail:delivery", addr);
1410 #endif
1411
1412 /* Build up the log line for the message and main logs */
1413
1414 /* Create the address string for logging. Must not do this earlier, because
1415 an OK result may be changed to FAIL when a pipe returns text. */
1416
1417 g = string_log_address(g, addr, LOGGING(all_parents), FALSE);
1418
1419 if (LOGGING(sender_on_delivery))
1420 g = string_append(g, 3, US" F=<", sender_address, US">");
1421
1422 if (*queue_name)
1423 g = string_append(g, 2, US" Q=", queue_name);
1424
1425 /* Return path may not be set if no delivery actually happened */
1426
1427 if (used_return_path && LOGGING(return_path_on_delivery))
1428 g = string_append(g, 3, US" P=<", used_return_path, US">");
1429
1430 if (addr->router)
1431 g = string_append(g, 2, US" R=", addr->router->name);
1432 if (addr->transport)
1433 g = string_append(g, 2, US" T=", addr->transport->name);
1434
1435 if (addr->host_used)
1436 g = d_hostlog(g, addr);
1437
1438 #ifdef SUPPORT_TLS
1439 g = d_tlslog(g, addr);
1440 #endif
1441
1442 if (addr->basic_errno > 0)
1443 g = string_append(g, 2, US": ", US strerror(addr->basic_errno));
1444
1445 if (addr->message)
1446 g = string_append(g, 2, US": ", addr->message);
1447
1448 (void) string_from_gstring(g);
1449
1450 /* Do the logging. For the message log, "routing failed" for those cases,
1451 just to make it clearer. */
1452
1453 if (driver_kind)
1454 deliver_msglog("%s %s failed for %s\n", now, driver_kind, g->s);
1455 else
1456 deliver_msglog("%s %s\n", now, g->s);
1457
1458 log_write(0, LOG_MAIN, "** %s", g->s);
1459
1460 store_reset(reset_point);
1461 return;
1462 }
1463
1464
1465
1466 /*************************************************
1467 * Actions at the end of handling an address *
1468 *************************************************/
1469
1470 /* This is a function for processing a single address when all that can be done
1471 with it has been done.
1472
1473 Arguments:
1474 addr points to the address block
1475 result the result of the delivery attempt
1476 logflags flags for log_write() (LOG_MAIN and/or LOG_PANIC)
1477 driver_type indicates which type of driver (transport, or router) was last
1478 to process the address
1479 logchar '=' or '-' for use when logging deliveries with => or ->
1480
1481 Returns: nothing
1482 */
1483
1484 static void
1485 post_process_one(address_item *addr, int result, int logflags, int driver_type,
1486 int logchar)
1487 {
1488 uschar *now = tod_stamp(tod_log);
1489 uschar *driver_kind = NULL;
1490 uschar *driver_name = NULL;
1491
1492 DEBUG(D_deliver) debug_printf("post-process %s (%d)\n", addr->address, result);
1493
1494 /* Set up driver kind and name for logging. Disable logging if the router or
1495 transport has disabled it. */
1496
1497 if (driver_type == EXIM_DTYPE_TRANSPORT)
1498 {
1499 if (addr->transport)
1500 {
1501 driver_name = addr->transport->name;
1502 driver_kind = US" transport";
1503 f.disable_logging = addr->transport->disable_logging;
1504 }
1505 else driver_kind = US"transporting";
1506 }
1507 else if (driver_type == EXIM_DTYPE_ROUTER)
1508 {
1509 if (addr->router)
1510 {
1511 driver_name = addr->router->name;
1512 driver_kind = US" router";
1513 f.disable_logging = addr->router->disable_logging;
1514 }
1515 else driver_kind = US"routing";
1516 }
1517
1518 /* If there's an error message set, ensure that it contains only printing
1519 characters - it should, but occasionally things slip in and this at least
1520 stops the log format from getting wrecked. We also scan the message for an LDAP
1521 expansion item that has a password setting, and flatten the password. This is a
1522 fudge, but I don't know a cleaner way of doing this. (If the item is badly
1523 malformed, it won't ever have gone near LDAP.) */
1524
1525 if (addr->message)
1526 {
1527 const uschar * s = string_printing(addr->message);
1528
1529 /* deconst cast ok as string_printing known to have alloc'n'copied */
1530 addr->message = expand_hide_passwords(US s);
1531 }
1532
1533 /* If we used a transport that has one of the "return_output" options set, and
1534 if it did in fact generate some output, then for return_output we treat the
1535 message as failed if it was not already set that way, so that the output gets
1536 returned to the sender, provided there is a sender to send it to. For
1537 return_fail_output, do this only if the delivery failed. Otherwise we just
1538 unlink the file, and remove the name so that if the delivery failed, we don't
1539 try to send back an empty or unwanted file. The log_output options operate only
1540 on a non-empty file.
1541
1542 In any case, we close the message file, because we cannot afford to leave a
1543 file-descriptor for one address while processing (maybe very many) others. */
1544
1545 if (addr->return_file >= 0 && addr->return_filename)
1546 {
1547 BOOL return_output = FALSE;
1548 struct stat statbuf;
1549 (void)EXIMfsync(addr->return_file);
1550
1551 /* If there is no output, do nothing. */
1552
1553 if (fstat(addr->return_file, &statbuf) == 0 && statbuf.st_size > 0)
1554 {
1555 transport_instance *tb = addr->transport;
1556
1557 /* Handle logging options */
1558
1559 if ( tb->log_output
1560 || result == FAIL && tb->log_fail_output
1561 || result == DEFER && tb->log_defer_output
1562 )
1563 {
1564 uschar *s;
1565 FILE *f = Ufopen(addr->return_filename, "rb");
1566 if (!f)
1567 log_write(0, LOG_MAIN|LOG_PANIC, "failed to open %s to log output "
1568 "from %s transport: %s", addr->return_filename, tb->name,
1569 strerror(errno));
1570 else
1571 if ((s = US Ufgets(big_buffer, big_buffer_size, f)))
1572 {
1573 uschar *p = big_buffer + Ustrlen(big_buffer);
1574 const uschar * sp;
1575 while (p > big_buffer && isspace(p[-1])) p--;
1576 *p = 0;
1577 sp = string_printing(big_buffer);
1578 log_write(0, LOG_MAIN, "<%s>: %s transport output: %s",
1579 addr->address, tb->name, sp);
1580 }
1581 (void)fclose(f);
1582 }
1583
1584 /* Handle returning options, but only if there is an address to return
1585 the text to. */
1586
1587 if (sender_address[0] != 0 || addr->prop.errors_address)
1588 if (tb->return_output)
1589 {
1590 addr->transport_return = result = FAIL;
1591 if (addr->basic_errno == 0 && !addr->message)
1592 addr->message = US"return message generated";
1593 return_output = TRUE;
1594 }
1595 else
1596 if (tb->return_fail_output && result == FAIL) return_output = TRUE;
1597 }
1598
1599 /* Get rid of the file unless it might be returned, but close it in
1600 all cases. */
1601
1602 if (!return_output)
1603 {
1604 Uunlink(addr->return_filename);
1605 addr->return_filename = NULL;
1606 addr->return_file = -1;
1607 }
1608
1609 (void)close(addr->return_file);
1610 }
1611
1612 /* The success case happens only after delivery by a transport. */
1613
1614 if (result == OK)
1615 {
1616 addr->next = addr_succeed;
1617 addr_succeed = addr;
1618
1619 /* Call address_done() to ensure that we don't deliver to this address again,
1620 and write appropriate things to the message log. If it is a child address, we
1621 call child_done() to scan the ancestors and mark them complete if this is the
1622 last child to complete. */
1623
1624 address_done(addr, now);
1625 DEBUG(D_deliver) debug_printf("%s delivered\n", addr->address);
1626
1627 if (!addr->parent)
1628 deliver_msglog("%s %s: %s%s succeeded\n", now, addr->address,
1629 driver_name, driver_kind);
1630 else
1631 {
1632 deliver_msglog("%s %s <%s>: %s%s succeeded\n", now, addr->address,
1633 addr->parent->address, driver_name, driver_kind);
1634 child_done(addr, now);
1635 }
1636
1637 /* Certificates for logging (via events) */
1638 #ifdef SUPPORT_TLS
1639 tls_out.ourcert = addr->ourcert;
1640 addr->ourcert = NULL;
1641 tls_out.peercert = addr->peercert;
1642 addr->peercert = NULL;
1643
1644 tls_out.cipher = addr->cipher;
1645 tls_out.peerdn = addr->peerdn;
1646 tls_out.ocsp = addr->ocsp;
1647 # ifdef SUPPORT_DANE
1648 tls_out.dane_verified = testflag(addr, af_dane_verified);
1649 # endif
1650 #endif
1651
1652 delivery_log(LOG_MAIN, addr, logchar, NULL);
1653
1654 #ifdef SUPPORT_TLS
1655 tls_free_cert(&tls_out.ourcert);
1656 tls_free_cert(&tls_out.peercert);
1657 tls_out.cipher = NULL;
1658 tls_out.peerdn = NULL;
1659 tls_out.ocsp = OCSP_NOT_REQ;
1660 # ifdef SUPPORT_DANE
1661 tls_out.dane_verified = FALSE;
1662 # endif
1663 #endif
1664 }
1665
1666
1667 /* Soft failure, or local delivery process failed; freezing may be
1668 requested. */
1669
1670 else if (result == DEFER || result == PANIC)
1671 {
1672 if (result == PANIC) logflags |= LOG_PANIC;
1673
1674 /* This puts them on the chain in reverse order. Do not change this, because
1675 the code for handling retries assumes that the one with the retry
1676 information is last. */
1677
1678 addr->next = addr_defer;
1679 addr_defer = addr;
1680
1681 /* The only currently implemented special action is to freeze the
1682 message. Logging of this is done later, just before the -H file is
1683 updated. */
1684
1685 if (addr->special_action == SPECIAL_FREEZE)
1686 {
1687 f.deliver_freeze = TRUE;
1688 deliver_frozen_at = time(NULL);
1689 update_spool = TRUE;
1690 }
1691
1692 /* If doing a 2-stage queue run, we skip writing to either the message
1693 log or the main log for SMTP defers. */
1694
1695 if (!f.queue_2stage || addr->basic_errno != 0)
1696 deferral_log(addr, now, logflags, driver_name, driver_kind);
1697 }
1698
1699
1700 /* Hard failure. If there is an address to which an error message can be sent,
1701 put this address on the failed list. If not, put it on the deferred list and
1702 freeze the mail message for human attention. The latter action can also be
1703 explicitly requested by a router or transport. */
1704
1705 else
1706 {
1707 /* If this is a delivery error, or a message for which no replies are
1708 wanted, and the message's age is greater than ignore_bounce_errors_after,
1709 force the af_ignore_error flag. This will cause the address to be discarded
1710 later (with a log entry). */
1711
1712 if (!*sender_address && message_age >= ignore_bounce_errors_after)
1713 addr->prop.ignore_error = TRUE;
1714
1715 /* Freeze the message if requested, or if this is a bounce message (or other
1716 message with null sender) and this address does not have its own errors
1717 address. However, don't freeze if errors are being ignored. The actual code
1718 to ignore occurs later, instead of sending a message. Logging of freezing
1719 occurs later, just before writing the -H file. */
1720
1721 if ( !addr->prop.ignore_error
1722 && ( addr->special_action == SPECIAL_FREEZE
1723 || (sender_address[0] == 0 && !addr->prop.errors_address)
1724 ) )
1725 {
1726 frozen_info = addr->special_action == SPECIAL_FREEZE
1727 ? US""
1728 : f.sender_local && !f.local_error_message
1729 ? US" (message created with -f <>)"
1730 : US" (delivery error message)";
1731 f.deliver_freeze = TRUE;
1732 deliver_frozen_at = time(NULL);
1733 update_spool = TRUE;
1734
1735 /* The address is put on the defer rather than the failed queue, because
1736 the message is being retained. */
1737
1738 addr->next = addr_defer;
1739 addr_defer = addr;
1740 }
1741
1742 /* Don't put the address on the nonrecipients tree yet; wait until an
1743 error message has been successfully sent. */
1744
1745 else
1746 {
1747 addr->next = addr_failed;
1748 addr_failed = addr;
1749 }
1750
1751 failure_log(addr, driver_name ? NULL : driver_kind, now);
1752 }
1753
1754 /* Ensure logging is turned on again in all cases */
1755
1756 f.disable_logging = FALSE;
1757 }
1758
1759
1760
1761
1762 /*************************************************
1763 * Address-independent error *
1764 *************************************************/
1765
1766 /* This function is called when there's an error that is not dependent on a
1767 particular address, such as an expansion string failure. It puts the error into
1768 all the addresses in a batch, logs the incident on the main and panic logs, and
1769 clears the expansions. It is mostly called from local_deliver(), but can be
1770 called for a remote delivery via findugid().
1771
1772 Arguments:
1773 logit TRUE if (MAIN+PANIC) logging required
1774 addr the first of the chain of addresses
1775 code the error code
1776 format format string for error message, or NULL if already set in addr
1777 ... arguments for the format
1778
1779 Returns: nothing
1780 */
1781
1782 static void
1783 common_error(BOOL logit, address_item *addr, int code, uschar *format, ...)
1784 {
1785 address_item *addr2;
1786 addr->basic_errno = code;
1787
1788 if (format)
1789 {
1790 va_list ap;
1791 gstring * g;
1792
1793 va_start(ap, format);
1794 g = string_vformat(NULL, TRUE, CS format, ap);
1795 va_end(ap);
1796 addr->message = string_from_gstring(g);
1797 }
1798
1799 for (addr2 = addr->next; addr2; addr2 = addr2->next)
1800 {
1801 addr2->basic_errno = code;
1802 addr2->message = addr->message;
1803 }
1804
1805 if (logit) log_write(0, LOG_MAIN|LOG_PANIC, "%s", addr->message);
1806 deliver_set_expansions(NULL);
1807 }
1808
1809
1810
1811
1812 /*************************************************
1813 * Check a "never users" list *
1814 *************************************************/
1815
1816 /* This function is called to check whether a uid is on one of the two "never
1817 users" lists.
1818
1819 Arguments:
1820 uid the uid to be checked
1821 nusers the list to be scanned; the first item in the list is the count
1822
1823 Returns: TRUE if the uid is on the list
1824 */
1825
1826 static BOOL
1827 check_never_users(uid_t uid, uid_t *nusers)
1828 {
1829 int i;
1830 if (!nusers) return FALSE;
1831 for (i = 1; i <= (int)(nusers[0]); i++) if (nusers[i] == uid) return TRUE;
1832 return FALSE;
1833 }
1834
1835
1836
1837 /*************************************************
1838 * Find uid and gid for a transport *
1839 *************************************************/
1840
1841 /* This function is called for both local and remote deliveries, to find the
1842 uid/gid under which to run the delivery. The values are taken preferentially
1843 from the transport (either explicit or deliver_as_creator), then from the
1844 address (i.e. the router), and if nothing is set, the exim uid/gid are used. If
1845 the resulting uid is on the "never_users" or the "fixed_never_users" list, a
1846 panic error is logged, and the function fails (which normally leads to delivery
1847 deferral).
1848
1849 Arguments:
1850 addr the address (possibly a chain)
1851 tp the transport
1852 uidp pointer to uid field
1853 gidp pointer to gid field
1854 igfp pointer to the use_initgroups field
1855
1856 Returns: FALSE if failed - error has been set in address(es)
1857 */
1858
1859 static BOOL
1860 findugid(address_item *addr, transport_instance *tp, uid_t *uidp, gid_t *gidp,
1861 BOOL *igfp)
1862 {
1863 uschar *nuname;
1864 BOOL gid_set = FALSE;
1865
1866 /* Default initgroups flag comes from the transport */
1867
1868 *igfp = tp->initgroups;
1869
1870 /* First see if there's a gid on the transport, either fixed or expandable.
1871 The expanding function always logs failure itself. */
1872
1873 if (tp->gid_set)
1874 {
1875 *gidp = tp->gid;
1876 gid_set = TRUE;
1877 }
1878 else if (tp->expand_gid)
1879 {
1880 if (!route_find_expanded_group(tp->expand_gid, tp->name, US"transport", gidp,
1881 &(addr->message)))
1882 {
1883 common_error(FALSE, addr, ERRNO_GIDFAIL, NULL);
1884 return FALSE;
1885 }
1886 gid_set = TRUE;
1887 }
1888
1889 /* If the transport did not set a group, see if the router did. */
1890
1891 if (!gid_set && testflag(addr, af_gid_set))
1892 {
1893 *gidp = addr->gid;
1894 gid_set = TRUE;
1895 }
1896
1897 /* Pick up a uid from the transport if one is set. */
1898
1899 if (tp->uid_set) *uidp = tp->uid;
1900
1901 /* Otherwise, try for an expandable uid field. If it ends up as a numeric id,
1902 it does not provide a passwd value from which a gid can be taken. */
1903
1904 else if (tp->expand_uid)
1905 {
1906 struct passwd *pw;
1907 if (!route_find_expanded_user(tp->expand_uid, tp->name, US"transport", &pw,
1908 uidp, &(addr->message)))
1909 {
1910 common_error(FALSE, addr, ERRNO_UIDFAIL, NULL);
1911 return FALSE;
1912 }
1913 if (!gid_set && pw)
1914 {
1915 *gidp = pw->pw_gid;
1916 gid_set = TRUE;
1917 }
1918 }
1919
1920 /* If the transport doesn't set the uid, test the deliver_as_creator flag. */
1921
1922 else if (tp->deliver_as_creator)
1923 {
1924 *uidp = originator_uid;
1925 if (!gid_set)
1926 {
1927 *gidp = originator_gid;
1928 gid_set = TRUE;
1929 }
1930 }
1931
1932 /* Otherwise see if the address specifies the uid and if so, take it and its
1933 initgroups flag. */
1934
1935 else if (testflag(addr, af_uid_set))
1936 {
1937 *uidp = addr->uid;
1938 *igfp = testflag(addr, af_initgroups);
1939 }
1940
1941 /* Nothing has specified the uid - default to the Exim user, and group if the
1942 gid is not set. */
1943
1944 else
1945 {
1946 *uidp = exim_uid;
1947 if (!gid_set)
1948 {
1949 *gidp = exim_gid;
1950 gid_set = TRUE;
1951 }
1952 }
1953
1954 /* If no gid is set, it is a disaster. We default to the Exim gid only if
1955 defaulting to the Exim uid. In other words, if the configuration has specified
1956 a uid, it must also provide a gid. */
1957
1958 if (!gid_set)
1959 {
1960 common_error(TRUE, addr, ERRNO_GIDFAIL, US"User set without group for "
1961 "%s transport", tp->name);
1962 return FALSE;
1963 }
1964
1965 /* Check that the uid is not on the lists of banned uids that may not be used
1966 for delivery processes. */
1967
1968 nuname = check_never_users(*uidp, never_users)
1969 ? US"never_users"
1970 : check_never_users(*uidp, fixed_never_users)
1971 ? US"fixed_never_users"
1972 : NULL;
1973 if (nuname)
1974 {
1975 common_error(TRUE, addr, ERRNO_UIDFAIL, US"User %ld set for %s transport "
1976 "is on the %s list", (long int)(*uidp), tp->name, nuname);
1977 return FALSE;
1978 }
1979
1980 /* All is well */
1981
1982 return TRUE;
1983 }
1984
1985
1986
1987
1988 /*************************************************
1989 * Check the size of a message for a transport *
1990 *************************************************/
1991
1992 /* Checks that the message isn't too big for the selected transport.
1993 This is called only when it is known that the limit is set.
1994
1995 Arguments:
1996 tp the transport
1997 addr the (first) address being delivered
1998
1999 Returns: OK
2000 DEFER expansion failed or did not yield an integer
2001 FAIL message too big
2002 */
2003
2004 int
2005 check_message_size(transport_instance *tp, address_item *addr)
2006 {
2007 int rc = OK;
2008 int size_limit;
2009
2010 deliver_set_expansions(addr);
2011 size_limit = expand_string_integer(tp->message_size_limit, TRUE);
2012 deliver_set_expansions(NULL);
2013
2014 if (expand_string_message)
2015 {
2016 rc = DEFER;
2017 addr->message = size_limit == -1
2018 ? string_sprintf("failed to expand message_size_limit "
2019 "in %s transport: %s", tp->name, expand_string_message)
2020 : string_sprintf("invalid message_size_limit "
2021 "in %s transport: %s", tp->name, expand_string_message);
2022 }
2023 else if (size_limit > 0 && message_size > size_limit)
2024 {
2025 rc = FAIL;
2026 addr->message =
2027 string_sprintf("message is too big (transport limit = %d)",
2028 size_limit);
2029 }
2030
2031 return rc;
2032 }
2033
2034
2035
2036 /*************************************************
2037 * Transport-time check for a previous delivery *
2038 *************************************************/
2039
2040 /* Check that this base address hasn't previously been delivered to its routed
2041 transport. If it has been delivered, mark it done. The check is necessary at
2042 delivery time in order to handle homonymic addresses correctly in cases where
2043 the pattern of redirection changes between delivery attempts (so the unique
2044 fields change). Non-homonymic previous delivery is detected earlier, at routing
2045 time (which saves unnecessary routing).
2046
2047 Arguments:
2048 addr the address item
2049 testing TRUE if testing wanted only, without side effects
2050
2051 Returns: TRUE if previously delivered by the transport
2052 */
2053
2054 static BOOL
2055 previously_transported(address_item *addr, BOOL testing)
2056 {
2057 (void)string_format(big_buffer, big_buffer_size, "%s/%s",
2058 addr->unique + (testflag(addr, af_homonym)? 3:0), addr->transport->name);
2059
2060 if (tree_search(tree_nonrecipients, big_buffer) != 0)
2061 {
2062 DEBUG(D_deliver|D_route|D_transport)
2063 debug_printf("%s was previously delivered (%s transport): discarded\n",
2064 addr->address, addr->transport->name);
2065 if (!testing) child_done(addr, tod_stamp(tod_log));
2066 return TRUE;
2067 }
2068
2069 return FALSE;
2070 }
2071
2072
2073
2074 /******************************************************
2075 * Check for a given header in a header string *
2076 ******************************************************/
2077
2078 /* This function is used when generating quota warnings. The configuration may
2079 specify any header lines it likes in quota_warn_message. If certain of them are
2080 missing, defaults are inserted, so we need to be able to test for the presence
2081 of a given header.
2082
2083 Arguments:
2084 hdr the required header name
2085 hstring the header string
2086
2087 Returns: TRUE the header is in the string
2088 FALSE the header is not in the string
2089 */
2090
2091 static BOOL
2092 contains_header(uschar *hdr, uschar *hstring)
2093 {
2094 int len = Ustrlen(hdr);
2095 uschar *p = hstring;
2096 while (*p != 0)
2097 {
2098 if (strncmpic(p, hdr, len) == 0)
2099 {
2100 p += len;
2101 while (*p == ' ' || *p == '\t') p++;
2102 if (*p == ':') return TRUE;
2103 }
2104 while (*p != 0 && *p != '\n') p++;
2105 if (*p == '\n') p++;
2106 }
2107 return FALSE;
2108 }
2109
2110
2111
2112
2113 /*************************************************
2114 * Perform a local delivery *
2115 *************************************************/
2116
2117 /* Each local delivery is performed in a separate process which sets its
2118 uid and gid as specified. This is a safer way than simply changing and
2119 restoring using seteuid(); there is a body of opinion that seteuid() cannot be
2120 used safely. From release 4, Exim no longer makes any use of it. Besides, not
2121 all systems have seteuid().
2122
2123 If the uid/gid are specified in the transport_instance, they are used; the
2124 transport initialization must ensure that either both or neither are set.
2125 Otherwise, the values associated with the address are used. If neither are set,
2126 it is a configuration error.
2127
2128 The transport or the address may specify a home directory (transport over-
2129 rides), and if they do, this is set as $home. If neither have set a working
2130 directory, this value is used for that as well. Otherwise $home is left unset
2131 and the cwd is set to "/" - a directory that should be accessible to all users.
2132
2133 Using a separate process makes it more complicated to get error information
2134 back. We use a pipe to pass the return code and also an error code and error
2135 text string back to the parent process.
2136
2137 Arguments:
2138 addr points to an address block for this delivery; for "normal" local
2139 deliveries this is the only address to be delivered, but for
2140 pseudo-remote deliveries (e.g. by batch SMTP to a file or pipe)
2141 a number of addresses can be handled simultaneously, and in this
2142 case addr will point to a chain of addresses with the same
2143 characteristics.
2144
2145 shadowing TRUE if running a shadow transport; this causes output from pipes
2146 to be ignored.
2147
2148 Returns: nothing
2149 */
2150
2151 static void
2152 deliver_local(address_item *addr, BOOL shadowing)
2153 {
2154 BOOL use_initgroups;
2155 uid_t uid;
2156 gid_t gid;
2157 int status, len, rc;
2158 int pfd[2];
2159 pid_t pid;
2160 uschar *working_directory;
2161 address_item *addr2;
2162 transport_instance *tp = addr->transport;
2163
2164 /* Set up the return path from the errors or sender address. If the transport
2165 has its own return path setting, expand it and replace the existing value. */
2166
2167 if(addr->prop.errors_address)
2168 return_path = addr->prop.errors_address;
2169 #ifdef EXPERIMENTAL_SRS
2170 else if (addr->prop.srs_sender)
2171 return_path = addr->prop.srs_sender;
2172 #endif
2173 else
2174 return_path = sender_address;
2175
2176 if (tp->return_path)
2177 {
2178 uschar *new_return_path = expand_string(tp->return_path);
2179 if (!new_return_path)
2180 {
2181 if (!f.expand_string_forcedfail)
2182 {
2183 common_error(TRUE, addr, ERRNO_EXPANDFAIL,
2184 US"Failed to expand return path \"%s\" in %s transport: %s",
2185 tp->return_path, tp->name, expand_string_message);
2186 return;
2187 }
2188 }
2189 else return_path = new_return_path;
2190 }
2191
2192 /* For local deliveries, one at a time, the value used for logging can just be
2193 set directly, once and for all. */
2194
2195 used_return_path = return_path;
2196
2197 /* Sort out the uid, gid, and initgroups flag. If an error occurs, the message
2198 gets put into the address(es), and the expansions are unset, so we can just
2199 return. */
2200
2201 if (!findugid(addr, tp, &uid, &gid, &use_initgroups)) return;
2202
2203 /* See if either the transport or the address specifies a home directory. A
2204 home directory set in the address may already be expanded; a flag is set to
2205 indicate that. In other cases we must expand it. */
2206
2207 if ( (deliver_home = tp->home_dir) /* Set in transport, or */
2208 || ( (deliver_home = addr->home_dir) /* Set in address and */
2209 && !testflag(addr, af_home_expanded) /* not expanded */
2210 ) )
2211 {
2212 uschar *rawhome = deliver_home;
2213 deliver_home = NULL; /* in case it contains $home */
2214 if (!(deliver_home = expand_string(rawhome)))
2215 {
2216 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"home directory \"%s\" failed "
2217 "to expand for %s transport: %s", rawhome, tp->name,
2218 expand_string_message);
2219 return;
2220 }
2221 if (*deliver_home != '/')
2222 {
2223 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"home directory path \"%s\" "
2224 "is not absolute for %s transport", deliver_home, tp->name);
2225 return;
2226 }
2227 }
2228
2229 /* See if either the transport or the address specifies a current directory,
2230 and if so, expand it. If nothing is set, use the home directory, unless it is
2231 also unset in which case use "/", which is assumed to be a directory to which
2232 all users have access. It is necessary to be in a visible directory for some
2233 operating systems when running pipes, as some commands (e.g. "rm" under Solaris
2234 2.5) require this. */
2235
2236 working_directory = tp->current_dir ? tp->current_dir : addr->current_dir;
2237 if (working_directory)
2238 {
2239 uschar *raw = working_directory;
2240 if (!(working_directory = expand_string(raw)))
2241 {
2242 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"current directory \"%s\" "
2243 "failed to expand for %s transport: %s", raw, tp->name,
2244 expand_string_message);
2245 return;
2246 }
2247 if (*working_directory != '/')
2248 {
2249 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"current directory path "
2250 "\"%s\" is not absolute for %s transport", working_directory, tp->name);
2251 return;
2252 }
2253 }
2254 else working_directory = deliver_home ? deliver_home : US"/";
2255
2256 /* If one of the return_output flags is set on the transport, create and open a
2257 file in the message log directory for the transport to write its output onto.
2258 This is mainly used by pipe transports. The file needs to be unique to the
2259 address. This feature is not available for shadow transports. */
2260
2261 if ( !shadowing
2262 && ( tp->return_output || tp->return_fail_output
2263 || tp->log_output || tp->log_fail_output || tp->log_defer_output
2264 ) )
2265 {
2266 uschar * error;
2267
2268 addr->return_filename =
2269 spool_fname(US"msglog", message_subdir, message_id,
2270 string_sprintf("-%d-%d", getpid(), return_count++));
2271
2272 if ((addr->return_file = open_msglog_file(addr->return_filename, 0400, &error)) < 0)
2273 {
2274 common_error(TRUE, addr, errno, US"Unable to %s file for %s transport "
2275 "to return message: %s", error, tp->name, strerror(errno));
2276 return;
2277 }
2278 }
2279
2280 /* Create the pipe for inter-process communication. */
2281
2282 if (pipe(pfd) != 0)
2283 {
2284 common_error(TRUE, addr, ERRNO_PIPEFAIL, US"Creation of pipe failed: %s",
2285 strerror(errno));
2286 return;
2287 }
2288
2289 /* Now fork the process to do the real work in the subprocess, but first
2290 ensure that all cached resources are freed so that the subprocess starts with
2291 a clean slate and doesn't interfere with the parent process. */
2292
2293 search_tidyup();
2294
2295 if ((pid = fork()) == 0)
2296 {
2297 BOOL replicate = TRUE;
2298
2299 /* Prevent core dumps, as we don't want them in users' home directories.
2300 HP-UX doesn't have RLIMIT_CORE; I don't know how to do this in that
2301 system. Some experimental/developing systems (e.g. GNU/Hurd) may define
2302 RLIMIT_CORE but not support it in setrlimit(). For such systems, do not
2303 complain if the error is "not supported".
2304
2305 There are two scenarios where changing the max limit has an effect. In one,
2306 the user is using a .forward and invoking a command of their choice via pipe;
2307 for these, we do need the max limit to be 0 unless the admin chooses to
2308 permit an increased limit. In the other, the command is invoked directly by
2309 the transport and is under administrator control, thus being able to raise
2310 the limit aids in debugging. So there's no general always-right answer.
2311
2312 Thus we inhibit core-dumps completely but let individual transports, while
2313 still root, re-raise the limits back up to aid debugging. We make the
2314 default be no core-dumps -- few enough people can use core dumps in
2315 diagnosis that it's reasonable to make them something that has to be explicitly requested.
2316 */
2317
2318 #ifdef RLIMIT_CORE
2319 struct rlimit rl;
2320 rl.rlim_cur = 0;
2321 rl.rlim_max = 0;
2322 if (setrlimit(RLIMIT_CORE, &rl) < 0)
2323 {
2324 # ifdef SETRLIMIT_NOT_SUPPORTED
2325 if (errno != ENOSYS && errno != ENOTSUP)
2326 # endif
2327 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_CORE) failed: %s",
2328 strerror(errno));
2329 }
2330 #endif
2331
2332 /* Reset the random number generator, so different processes don't all
2333 have the same sequence. */
2334
2335 random_seed = 0;
2336
2337 /* If the transport has a setup entry, call this first, while still
2338 privileged. (Appendfile uses this to expand quota, for example, while
2339 able to read private files.) */
2340
2341 if (addr->transport->setup)
2342 switch((addr->transport->setup)(addr->transport, addr, NULL, uid, gid,
2343 &(addr->message)))
2344 {
2345 case DEFER:
2346 addr->transport_return = DEFER;
2347 goto PASS_BACK;
2348
2349 case FAIL:
2350 addr->transport_return = PANIC;
2351 goto PASS_BACK;
2352 }
2353
2354 /* Ignore SIGINT and SIGTERM during delivery. Also ignore SIGUSR1, as
2355 when the process becomes unprivileged, it won't be able to write to the
2356 process log. SIGHUP is ignored throughout exim, except when it is being
2357 run as a daemon. */
2358
2359 signal(SIGINT, SIG_IGN);
2360 signal(SIGTERM, SIG_IGN);
2361 signal(SIGUSR1, SIG_IGN);
2362
2363 /* Close the unwanted half of the pipe, and set close-on-exec for the other
2364 half - for transports that exec things (e.g. pipe). Then set the required
2365 gid/uid. */
2366
2367 (void)close(pfd[pipe_read]);
2368 (void)fcntl(pfd[pipe_write], F_SETFD, fcntl(pfd[pipe_write], F_GETFD) |
2369 FD_CLOEXEC);
2370 exim_setugid(uid, gid, use_initgroups,
2371 string_sprintf("local delivery to %s <%s> transport=%s", addr->local_part,
2372 addr->address, addr->transport->name));
2373
2374 DEBUG(D_deliver)
2375 {
2376 address_item *batched;
2377 debug_printf(" home=%s current=%s\n", deliver_home, working_directory);
2378 for (batched = addr->next; batched; batched = batched->next)
2379 debug_printf("additional batched address: %s\n", batched->address);
2380 }
2381
2382 /* Set an appropriate working directory. */
2383
2384 if (Uchdir(working_directory) < 0)
2385 {
2386 addr->transport_return = DEFER;
2387 addr->basic_errno = errno;
2388 addr->message = string_sprintf("failed to chdir to %s", working_directory);
2389 }
2390
2391 /* If successful, call the transport */
2392
2393 else
2394 {
2395 BOOL ok = TRUE;
2396 set_process_info("delivering %s to %s using %s", message_id,
2397 addr->local_part, addr->transport->name);
2398
2399 /* Setting this global in the subprocess means we need never clear it */
2400 transport_name = addr->transport->name;
2401
2402 /* If a transport filter has been specified, set up its argument list.
2403 Any errors will get put into the address, and FALSE yielded. */
2404
2405 if (addr->transport->filter_command)
2406 {
2407 ok = transport_set_up_command(&transport_filter_argv,
2408 addr->transport->filter_command,
2409 TRUE, PANIC, addr, US"transport filter", NULL);
2410 transport_filter_timeout = addr->transport->filter_timeout;
2411 }
2412 else transport_filter_argv = NULL;
2413
2414 if (ok)
2415 {
2416 debug_print_string(addr->transport->debug_string);
2417 replicate = !(addr->transport->info->code)(addr->transport, addr);
2418 }
2419 }
2420
2421 /* Pass the results back down the pipe. If necessary, first replicate the
2422 status in the top address to the others in the batch. The label is the
2423 subject of a goto when a call to the transport's setup function fails. We
2424 pass the pointer to the transport back in case it got changed as a result of
2425 file_format in appendfile. */
2426
2427 PASS_BACK:
2428
2429 if (replicate) replicate_status(addr);
2430 for (addr2 = addr; addr2; addr2 = addr2->next)
2431 {
2432 int i;
2433 int local_part_length = Ustrlen(addr2->local_part);
2434 uschar *s;
2435 int ret;
2436
2437 if( (ret = write(pfd[pipe_write], &addr2->transport_return, sizeof(int))) != sizeof(int)
2438 || (ret = write(pfd[pipe_write], &transport_count, sizeof(transport_count))) != sizeof(transport_count)
2439 || (ret = write(pfd[pipe_write], &addr2->flags, sizeof(addr2->flags))) != sizeof(addr2->flags)
2440 || (ret = write(pfd[pipe_write], &addr2->basic_errno, sizeof(int))) != sizeof(int)
2441 || (ret = write(pfd[pipe_write], &addr2->more_errno, sizeof(int))) != sizeof(int)
2442 || (ret = write(pfd[pipe_write], &addr2->delivery_usec, sizeof(int))) != sizeof(int)
2443 || (ret = write(pfd[pipe_write], &addr2->special_action, sizeof(int))) != sizeof(int)
2444 || (ret = write(pfd[pipe_write], &addr2->transport,
2445 sizeof(transport_instance *))) != sizeof(transport_instance *)
2446
2447 /* For a file delivery, pass back the local part, in case the original
2448 was only part of the final delivery path. This gives more complete
2449 logging. */
2450
2451 || (testflag(addr2, af_file)
2452 && ( (ret = write(pfd[pipe_write], &local_part_length, sizeof(int))) != sizeof(int)
2453 || (ret = write(pfd[pipe_write], addr2->local_part, local_part_length)) != local_part_length
2454 )
2455 )
2456 )
2457 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s",
2458 ret == -1 ? strerror(errno) : "short write");
2459
2460 /* Now any messages */
2461
2462 for (i = 0, s = addr2->message; i < 2; i++, s = addr2->user_message)
2463 {
2464 int message_length = s ? Ustrlen(s) + 1 : 0;
2465 if( (ret = write(pfd[pipe_write], &message_length, sizeof(int))) != sizeof(int)
2466 || message_length > 0 && (ret = write(pfd[pipe_write], s, message_length)) != message_length
2467 )
2468 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s",
2469 ret == -1 ? strerror(errno) : "short write");
2470 }
2471 }
2472
2473 /* OK, this process is now done. Free any cached resources that it opened,
2474 and close the pipe we were writing down before exiting. */
2475
2476 (void)close(pfd[pipe_write]);
2477 search_tidyup();
2478 exit(EXIT_SUCCESS);
2479 }
2480
2481 /* Back in the main process: panic if the fork did not succeed. This seems
2482 better than returning an error - if forking is failing it is probably best
2483 not to try other deliveries for this message. */
2484
2485 if (pid < 0)
2486 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Fork failed for local delivery to %s",
2487 addr->address);
2488
2489 /* Read the pipe to get the delivery status codes and error messages. Our copy
2490 of the writing end must be closed first, as otherwise read() won't return zero
2491 on an empty pipe. We check that a status exists for each address before
2492 overwriting the address structure. If data is missing, the default DEFER status
2493 will remain. Afterwards, close the reading end. */
2494
2495 (void)close(pfd[pipe_write]);
2496
2497 for (addr2 = addr; addr2; addr2 = addr2->next)
2498 {
2499 if ((len = read(pfd[pipe_read], &status, sizeof(int))) > 0)
2500 {
2501 int i;
2502 uschar **sptr;
2503
2504 addr2->transport_return = status;
2505 len = read(pfd[pipe_read], &transport_count,
2506 sizeof(transport_count));
2507 len = read(pfd[pipe_read], &addr2->flags, sizeof(addr2->flags));
2508 len = read(pfd[pipe_read], &addr2->basic_errno, sizeof(int));
2509 len = read(pfd[pipe_read], &addr2->more_errno, sizeof(int));
2510 len = read(pfd[pipe_read], &addr2->delivery_usec, sizeof(int));
2511 len = read(pfd[pipe_read], &addr2->special_action, sizeof(int));
2512 len = read(pfd[pipe_read], &addr2->transport,
2513 sizeof(transport_instance *));
2514
2515 if (testflag(addr2, af_file))
2516 {
2517 int llen;
2518 if ( read(pfd[pipe_read], &llen, sizeof(int)) != sizeof(int)
2519 || llen > 64*4 /* limit from rfc 5821, times I18N factor */
2520 )
2521 {
2522 log_write(0, LOG_MAIN|LOG_PANIC, "bad local_part length read"
2523 " from delivery subprocess");
2524 break;
2525 }
2526 /* sanity-checked llen so disable the Coverity error */
2527 /* coverity[tainted_data] */
2528 if (read(pfd[pipe_read], big_buffer, llen) != llen)
2529 {
2530 log_write(0, LOG_MAIN|LOG_PANIC, "bad local_part read"
2531 " from delivery subprocess");
2532 break;
2533 }
2534 big_buffer[llen] = 0;
2535 addr2->local_part = string_copy(big_buffer);
2536 }
2537
2538 for (i = 0, sptr = &addr2->message; i < 2; i++, sptr = &addr2->user_message)
2539 {
2540 int message_length;
2541 len = read(pfd[pipe_read], &message_length, sizeof(int));
2542 if (message_length > 0)
2543 {
2544 len = read(pfd[pipe_read], big_buffer, message_length);
2545 big_buffer[big_buffer_size-1] = '\0'; /* guard byte */
2546 if (len > 0) *sptr = string_copy(big_buffer);
2547 }
2548 }
2549 }
2550
2551 else
2552 {
2553 log_write(0, LOG_MAIN|LOG_PANIC, "failed to read delivery status for %s "
2554 "from delivery subprocess", addr2->unique);
2555 break;
2556 }
2557 }
2558
2559 (void)close(pfd[pipe_read]);
2560
2561 /* Unless shadowing, write all successful addresses immediately to the journal
2562 file, to ensure they are recorded asap. For homonymic addresses, use the base
2563 address plus the transport name. Failure to write the journal is panic-worthy,
2564 but don't stop, as it may prove possible subsequently to update the spool file
2565 in order to record the delivery. */
2566
2567 if (!shadowing)
2568 {
2569 for (addr2 = addr; addr2; addr2 = addr2->next)
2570 if (addr2->transport_return == OK)
2571 {
2572 if (testflag(addr2, af_homonym))
2573 sprintf(CS big_buffer, "%.500s/%s\n", addr2->unique + 3, tp->name);
2574 else
2575 sprintf(CS big_buffer, "%.500s\n", addr2->unique);
2576
2577 /* In the test harness, wait just a bit to let the subprocess finish off
2578 any debug output etc first. */
2579
2580 if (f.running_in_test_harness) millisleep(300);
2581
2582 DEBUG(D_deliver) debug_printf("journalling %s", big_buffer);
2583 len = Ustrlen(big_buffer);
2584 if (write(journal_fd, big_buffer, len) != len)
2585 log_write(0, LOG_MAIN|LOG_PANIC, "failed to update journal for %s: %s",
2586 big_buffer, strerror(errno));
2587 }
2588
2589 /* Ensure the journal file is pushed out to disk. */
2590
2591 if (EXIMfsync(journal_fd) < 0)
2592 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s",
2593 strerror(errno));
2594 }
2595
2596 /* Wait for the process to finish. If it terminates with a non-zero code,
2597 freeze the message (except for SIGTERM, SIGKILL and SIGQUIT), but leave the
2598 status values of all the addresses as they are. Take care to handle the case
2599 when the subprocess doesn't seem to exist. This has been seen on one system
2600 when Exim was called from an MUA that set SIGCHLD to SIG_IGN. When that
2601 happens, wait() doesn't recognize the termination of child processes. Exim now
2602 resets SIGCHLD to SIG_DFL, but this code should still be robust. */
2603
2604 while ((rc = wait(&status)) != pid)
2605 if (rc < 0 && errno == ECHILD) /* Process has vanished */
2606 {
2607 log_write(0, LOG_MAIN, "%s transport process vanished unexpectedly",
2608 addr->transport->driver_name);
2609 status = 0;
2610 break;
2611 }
2612
2613 if ((status & 0xffff) != 0)
2614 {
2615 int msb = (status >> 8) & 255;
2616 int lsb = status & 255;
2617 int code = (msb == 0)? (lsb & 0x7f) : msb;
2618 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
2619 addr->special_action = SPECIAL_FREEZE;
2620 log_write(0, LOG_MAIN|LOG_PANIC, "%s transport process returned non-zero "
2621 "status 0x%04x: %s %d",
2622 addr->transport->driver_name,
2623 status,
2624 msb == 0 ? "terminated by signal" : "exit code",
2625 code);
2626 }
2627
2628 /* If SPECIAL_WARN is set in the top address, send a warning message. */
2629
2630 if (addr->special_action == SPECIAL_WARN && addr->transport->warn_message)
2631 {
2632 int fd;
2633 uschar *warn_message;
2634 pid_t pid;
2635
2636 DEBUG(D_deliver) debug_printf("Warning message requested by transport\n");
2637
2638 if (!(warn_message = expand_string(addr->transport->warn_message)))
2639 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand \"%s\" (warning "
2640 "message for %s transport): %s", addr->transport->warn_message,
2641 addr->transport->name, expand_string_message);
2642
2643 else if ((pid = child_open_exim(&fd)) > 0)
2644 {
2645 FILE *f = fdopen(fd, "wb");
2646 if (errors_reply_to && !contains_header(US"Reply-To", warn_message))
2647 fprintf(f, "Reply-To: %s\n", errors_reply_to);
2648 fprintf(f, "Auto-Submitted: auto-replied\n");
2649 if (!contains_header(US"From", warn_message))
2650 moan_write_from(f);
2651 fprintf(f, "%s", CS warn_message);
2652
2653 /* Close and wait for child process to complete, without a timeout. */
2654
2655 (void)fclose(f);
2656 (void)child_close(pid, 0);
2657 }
2658
2659 addr->special_action = SPECIAL_NONE;
2660 }
2661 }
2662
2663
2664
2665
2666 /* Check transport for the given concurrency limit. Return TRUE if over
2667 the limit (or an expansion failure), else FALSE and if there was a limit,
2668 the key for the hints database used for the concurrency count. */
2669
2670 static BOOL
2671 tpt_parallel_check(transport_instance * tp, address_item * addr, uschar ** key)
2672 {
2673 unsigned max_parallel;
2674
2675 if (!tp->max_parallel) return FALSE;
2676
2677 max_parallel = (unsigned) expand_string_integer(tp->max_parallel, TRUE);
2678 if (expand_string_message)
2679 {
2680 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand max_parallel option "
2681 "in %s transport (%s): %s", tp->name, addr->address,
2682 expand_string_message);
2683 return TRUE;
2684 }
2685
2686 if (max_parallel > 0)
2687 {
2688 uschar * serialize_key = string_sprintf("tpt-serialize-%s", tp->name);
2689 if (!enq_start(serialize_key, max_parallel))
2690 {
2691 address_item * next;
2692 DEBUG(D_transport)
2693 debug_printf("skipping tpt %s because concurrency limit %u reached\n",
2694 tp->name, max_parallel);
2695 do
2696 {
2697 next = addr->next;
2698 addr->message = US"concurrency limit reached for transport";
2699 addr->basic_errno = ERRNO_TRETRY;
2700 post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_TRANSPORT, 0);
2701 } while ((addr = next));
2702 return TRUE;
2703 }
2704 *key = serialize_key;
2705 }
2706 return FALSE;
2707 }
2708
2709
2710
2711 /*************************************************
2712 * Do local deliveries *
2713 *************************************************/
2714
2715 /* This function processes the list of addresses in addr_local. True local
2716 deliveries are always done one address at a time. However, local deliveries can
2717 be batched up in some cases. Typically this is when writing batched SMTP output
2718 files for use by some external transport mechanism, or when running local
2719 deliveries over LMTP.
2720
2721 Arguments: None
2722 Returns: Nothing
2723 */
2724
2725 static void
2726 do_local_deliveries(void)
2727 {
2728 open_db dbblock;
2729 open_db *dbm_file = NULL;
2730 time_t now = time(NULL);
2731
2732 /* Loop until we have exhausted the supply of local deliveries */
2733
2734 while (addr_local)
2735 {
2736 struct timeval delivery_start;
2737 struct timeval deliver_time;
2738 address_item *addr2, *addr3, *nextaddr;
2739 int logflags = LOG_MAIN;
2740 int logchar = f.dont_deliver? '*' : '=';
2741 transport_instance *tp;
2742 uschar * serialize_key = NULL;
2743
2744 /* Pick the first undelivered address off the chain */
2745
2746 address_item *addr = addr_local;
2747 addr_local = addr->next;
2748 addr->next = NULL;
2749
2750 DEBUG(D_deliver|D_transport)
2751 debug_printf("--------> %s <--------\n", addr->address);
2752
2753 /* An internal disaster if there is no transport. Should not occur! */
2754
2755 if (!(tp = addr->transport))
2756 {
2757 logflags |= LOG_PANIC;
2758 f.disable_logging = FALSE; /* Jic */
2759 addr->message = addr->router
2760 ? string_sprintf("No transport set by %s router", addr->router->name)
2761 : string_sprintf("No transport set by system filter");
2762 post_process_one(addr, DEFER, logflags, EXIM_DTYPE_TRANSPORT, 0);
2763 continue;
2764 }
2765
2766 /* Check that this base address hasn't previously been delivered to this
2767 transport. The check is necessary at this point to handle homonymic addresses
2768 correctly in cases where the pattern of redirection changes between delivery
2769 attempts. Non-homonymic previous delivery is detected earlier, at routing
2770 time. */
2771
2772 if (previously_transported(addr, FALSE)) continue;
2773
2774 /* There are weird cases where logging is disabled */
2775
2776 f.disable_logging = tp->disable_logging;
2777
2778 /* Check for batched addresses and possible amalgamation. Skip all the work
2779 if either batch_max <= 1 or there aren't any other addresses for local
2780 delivery. */
2781
2782 if (tp->batch_max > 1 && addr_local)
2783 {
2784 int batch_count = 1;
2785 BOOL uses_dom = readconf_depends((driver_instance *)tp, US"domain");
2786 BOOL uses_lp = ( testflag(addr, af_pfr)
2787 && (testflag(addr, af_file) || addr->local_part[0] == '|')
2788 )
2789 || readconf_depends((driver_instance *)tp, US"local_part");
2790 uschar *batch_id = NULL;
2791 address_item **anchor = &addr_local;
2792 address_item *last = addr;
2793 address_item *next;
2794
2795 /* Expand the batch_id string for comparison with other addresses.
2796 Expansion failure suppresses batching. */
2797
2798 if (tp->batch_id)
2799 {
2800 deliver_set_expansions(addr);
2801 batch_id = expand_string(tp->batch_id);
2802 deliver_set_expansions(NULL);
2803 if (!batch_id)
2804 {
2805 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2806 "in %s transport (%s): %s", tp->name, addr->address,
2807 expand_string_message);
2808 batch_count = tp->batch_max;
2809 }
2810 }
2811
2812 /* Until we reach the batch_max limit, pick off addresses which have the
2813 same characteristics. These are:
2814
2815 same transport
2816 not previously delivered (see comment about 50 lines above)
2817 same local part if the transport's configuration contains $local_part
2818 or if this is a file or pipe delivery from a redirection
2819 same domain if the transport's configuration contains $domain
2820 same errors address
2821 same additional headers
2822 same headers to be removed
2823 same uid/gid for running the transport
2824 same first host if a host list is set
2825 */
2826
2827 while ((next = *anchor) && batch_count < tp->batch_max)
2828 {
2829 BOOL ok =
2830 tp == next->transport
2831 && !previously_transported(next, TRUE)
2832 && testflag(addr, af_pfr) == testflag(next, af_pfr)
2833 && testflag(addr, af_file) == testflag(next, af_file)
2834 && (!uses_lp || Ustrcmp(next->local_part, addr->local_part) == 0)
2835 && (!uses_dom || Ustrcmp(next->domain, addr->domain) == 0)
2836 && same_strings(next->prop.errors_address, addr->prop.errors_address)
2837 && same_headers(next->prop.extra_headers, addr->prop.extra_headers)
2838 && same_strings(next->prop.remove_headers, addr->prop.remove_headers)
2839 && same_ugid(tp, addr, next)
2840 && ( !addr->host_list && !next->host_list
2841 || addr->host_list
2842 && next->host_list
2843 && Ustrcmp(addr->host_list->name, next->host_list->name) == 0
2844 );
2845
2846 /* If the transport has a batch_id setting, batch_id will be non-NULL
2847 from the expansion outside the loop. Expand for this address and compare.
2848 Expansion failure makes this address ineligible for batching. */
2849
2850 if (ok && batch_id)
2851 {
2852 uschar *bid;
2853 address_item *save_nextnext = next->next;
2854 next->next = NULL; /* Expansion for a single address */
2855 deliver_set_expansions(next);
2856 next->next = save_nextnext;
2857 bid = expand_string(tp->batch_id);
2858 deliver_set_expansions(NULL);
2859 if (!bid)
2860 {
2861 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2862 "in %s transport (%s): %s", tp->name, next->address,
2863 expand_string_message);
2864 ok = FALSE;
2865 }
2866 else ok = (Ustrcmp(batch_id, bid) == 0);
2867 }
2868
2869 /* Take address into batch if OK. */
2870
2871 if (ok)
2872 {
2873 *anchor = next->next; /* Include the address */
2874 next->next = NULL;
2875 last->next = next;
2876 last = next;
2877 batch_count++;
2878 }
2879 else anchor = &next->next; /* Skip the address */
2880 }
2881 }
2882
2883 /* We now have one or more addresses that can be delivered in a batch. Check
2884 whether the transport is prepared to accept a message of this size. If not,
2885 fail them all forthwith. If the expansion fails, or does not yield an
2886 integer, defer delivery. */
2887
2888 if (tp->message_size_limit)
2889 {
2890 int rc = check_message_size(tp, addr);
2891 if (rc != OK)
2892 {
2893 replicate_status(addr);
2894 while (addr)
2895 {
2896 addr2 = addr->next;
2897 post_process_one(addr, rc, logflags, EXIM_DTYPE_TRANSPORT, 0);
2898 addr = addr2;
2899 }
2900 continue; /* With next batch of addresses */
2901 }
2902 }
2903
2904 /* If we are not running the queue, or if forcing, all deliveries will be
2905 attempted. Otherwise, we must respect the retry times for each address. Even
2906 when not doing this, we need to set up the retry key string, and determine
2907 whether a retry record exists, because after a successful delivery, a delete
2908 retry item must be set up. Keep the retry database open only for the duration
2909 of these checks, rather than for all local deliveries, because some local
2910 deliveries (e.g. to pipes) can take a substantial time. */
2911
2912 if (!(dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE)))
2913 {
2914 DEBUG(D_deliver|D_retry|D_hints_lookup)
2915 debug_printf("no retry data available\n");
2916 }
2917
2918 addr2 = addr;
2919 addr3 = NULL;
2920 while (addr2)
2921 {
2922 BOOL ok = TRUE; /* to deliver this address */
2923 uschar *retry_key;
2924
2925 /* Set up the retry key to include the domain or not, and change its
2926 leading character from "R" to "T". Must make a copy before doing this,
2927 because the old key may be pointed to from a "delete" retry item after
2928 a routing delay. */
2929
2930 retry_key = string_copy(
2931 tp->retry_use_local_part ? addr2->address_retry_key :
2932 addr2->domain_retry_key);
2933 *retry_key = 'T';
2934
2935 /* Inspect the retry data. If there is no hints file, delivery happens. */
2936
2937 if (dbm_file)
2938 {
2939 dbdata_retry *retry_record = dbfn_read(dbm_file, retry_key);
2940
2941 /* If there is no retry record, delivery happens. If there is,
2942 remember it exists so it can be deleted after a successful delivery. */
2943
2944 if (retry_record)
2945 {
2946 setflag(addr2, af_lt_retry_exists);
2947
2948 /* A retry record exists for this address. If queue running and not
2949 forcing, inspect its contents. If the record is too old, or if its
2950 retry time has come, or if it has passed its cutoff time, delivery
2951 will go ahead. */
2952
2953 DEBUG(D_retry)
2954 {
2955 debug_printf("retry record exists: age=%s ",
2956 readconf_printtime(now - retry_record->time_stamp));
2957 debug_printf("(max %s)\n", readconf_printtime(retry_data_expire));
2958 debug_printf(" time to retry = %s expired = %d\n",
2959 readconf_printtime(retry_record->next_try - now),
2960 retry_record->expired);
2961 }
2962
2963 if (f.queue_running && !f.deliver_force)
2964 {
2965 ok = (now - retry_record->time_stamp > retry_data_expire)
2966 || (now >= retry_record->next_try)
2967 || retry_record->expired;
2968
2969 /* If we haven't reached the retry time, there is one more check
2970 to do, which is for the ultimate address timeout. */
2971
2972 if (!ok)
2973 ok = retry_ultimate_address_timeout(retry_key, addr2->domain,
2974 retry_record, now);
2975 }
2976 }
2977 else DEBUG(D_retry) debug_printf("no retry record exists\n");
2978 }
2979
2980 /* This address is to be delivered. Leave it on the chain. */
2981
2982 if (ok)
2983 {
2984 addr3 = addr2;
2985 addr2 = addr2->next;
2986 }
2987
2988 /* This address is to be deferred. Take it out of the chain, and
2989 post-process it as complete. Must take it out of the chain first,
2990 because post processing puts it on another chain. */
2991
2992 else
2993 {
2994 address_item *this = addr2;
2995 this->message = US"Retry time not yet reached";
2996 this->basic_errno = ERRNO_LRETRY;
2997 addr2 = addr3 ? (addr3->next = addr2->next)
2998 : (addr = addr2->next);
2999 post_process_one(this, DEFER, logflags, EXIM_DTYPE_TRANSPORT, 0);
3000 }
3001 }
3002
3003 if (dbm_file) dbfn_close(dbm_file);
3004
3005 /* If there are no addresses left on the chain, they all deferred. Loop
3006 for the next set of addresses. */
3007
3008 if (!addr) continue;
3009
3010 /* If the transport is limited for parallellism, enforce that here.
3011 We use a hints DB entry, incremented here and decremented after
3012 the transport (and any shadow transport) completes. */
3013
3014 if (tpt_parallel_check(tp, addr, &serialize_key))
3015 {
3016 if (expand_string_message)
3017 {
3018 logflags |= LOG_PANIC;
3019 do
3020 {
3021 addr = addr->next;
3022 post_process_one(addr, DEFER, logflags, EXIM_DTYPE_TRANSPORT, 0);
3023 } while ((addr = addr2));
3024 }
3025 continue; /* Loop for the next set of addresses. */
3026 }
3027
3028
3029 /* So, finally, we do have some addresses that can be passed to the
3030 transport. Before doing so, set up variables that are relevant to a
3031 single delivery. */
3032
3033 deliver_set_expansions(addr);
3034
3035 gettimeofday(&delivery_start, NULL);
3036 deliver_local(addr, FALSE);
3037 timesince(&deliver_time, &delivery_start);
3038
3039 /* If a shadow transport (which must perforce be another local transport), is
3040 defined, and its condition is met, we must pass the message to the shadow
3041 too, but only those addresses that succeeded. We do this by making a new
3042 chain of addresses - also to keep the original chain uncontaminated. We must
3043 use a chain rather than doing it one by one, because the shadow transport may
3044 batch.
3045
3046 NOTE: if the condition fails because of a lookup defer, there is nothing we
3047 can do! */
3048
3049 if ( tp->shadow
3050 && ( !tp->shadow_condition
3051 || expand_check_condition(tp->shadow_condition, tp->name, US"transport")
3052 ) )
3053 {
3054 transport_instance *stp;
3055 address_item *shadow_addr = NULL;
3056 address_item **last = &shadow_addr;
3057
3058 for (stp = transports; stp; stp = stp->next)
3059 if (Ustrcmp(stp->name, tp->shadow) == 0) break;
3060
3061 if (!stp)
3062 log_write(0, LOG_MAIN|LOG_PANIC, "shadow transport \"%s\" not found ",
3063 tp->shadow);
3064
3065 /* Pick off the addresses that have succeeded, and make clones. Put into
3066 the shadow_message field a pointer to the shadow_message field of the real
3067 address. */
3068
3069 else for (addr2 = addr; addr2; addr2 = addr2->next)
3070 if (addr2->transport_return == OK)
3071 {
3072 addr3 = store_get(sizeof(address_item));
3073 *addr3 = *addr2;
3074 addr3->next = NULL;
3075 addr3->shadow_message = US &addr2->shadow_message;
3076 addr3->transport = stp;
3077 addr3->transport_return = DEFER;
3078 addr3->return_filename = NULL;
3079 addr3->return_file = -1;
3080 *last = addr3;
3081 last = &addr3->next;
3082 }
3083
3084 /* If we found any addresses to shadow, run the delivery, and stick any
3085 message back into the shadow_message field in the original. */
3086
3087 if (shadow_addr)
3088 {
3089 int save_count = transport_count;
3090
3091 DEBUG(D_deliver|D_transport)
3092 debug_printf(">>>>>>>>>>>>>>>> Shadow delivery >>>>>>>>>>>>>>>>\n");
3093 deliver_local(shadow_addr, TRUE);
3094
3095 for(; shadow_addr; shadow_addr = shadow_addr->next)
3096 {
3097 int sresult = shadow_addr->transport_return;
3098 *(uschar **)shadow_addr->shadow_message =
3099 sresult == OK
3100 ? string_sprintf(" ST=%s", stp->name)
3101 : string_sprintf(" ST=%s (%s%s%s)", stp->name,
3102 shadow_addr->basic_errno <= 0
3103 ? US""
3104 : US strerror(shadow_addr->basic_errno),
3105 shadow_addr->basic_errno <= 0 || !shadow_addr->message
3106 ? US""
3107 : US": ",
3108 shadow_addr->message
3109 ? shadow_addr->message
3110 : shadow_addr->basic_errno <= 0
3111 ? US"unknown error"
3112 : US"");
3113
3114 DEBUG(D_deliver|D_transport)
3115 debug_printf("%s shadow transport returned %s for %s\n",
3116 stp->name,
3117 sresult == OK ? "OK" :
3118 sresult == DEFER ? "DEFER" :
3119 sresult == FAIL ? "FAIL" :
3120 sresult == PANIC ? "PANIC" : "?",
3121 shadow_addr->address);
3122 }
3123
3124 DEBUG(D_deliver|D_transport)
3125 debug_printf(">>>>>>>>>>>>>>>> End shadow delivery >>>>>>>>>>>>>>>>\n");
3126
3127 transport_count = save_count; /* Restore original transport count */
3128 }
3129 }
3130
3131 /* Cancel the expansions that were set up for the delivery. */
3132
3133 deliver_set_expansions(NULL);
3134
3135 /* If the transport was parallelism-limited, decrement the hints DB record. */
3136
3137 if (serialize_key) enq_end(serialize_key);
3138
3139 /* Now we can process the results of the real transport. We must take each
3140 address off the chain first, because post_process_one() puts it on another
3141 chain. */
3142
3143 for (addr2 = addr; addr2; addr2 = nextaddr)
3144 {
3145 int result = addr2->transport_return;
3146 nextaddr = addr2->next;
3147
3148 DEBUG(D_deliver|D_transport)
3149 debug_printf("%s transport returned %s for %s\n",
3150 tp->name,
3151 result == OK ? "OK" :
3152 result == DEFER ? "DEFER" :
3153 result == FAIL ? "FAIL" :
3154 result == PANIC ? "PANIC" : "?",
3155 addr2->address);
3156
3157 /* If there is a retry_record, or if delivery is deferred, build a retry
3158 item for setting a new retry time or deleting the old retry record from
3159 the database. These items are handled all together after all addresses
3160 have been handled (so the database is open just for a short time for
3161 updating). */
3162
3163 if (result == DEFER || testflag(addr2, af_lt_retry_exists))
3164 {
3165 int flags = result == DEFER ? 0 : rf_delete;
3166 uschar *retry_key = string_copy(tp->retry_use_local_part
3167 ? addr2->address_retry_key : addr2->domain_retry_key);
3168 *retry_key = 'T';
3169 retry_add_item(addr2, retry_key, flags);
3170 }
3171
3172 /* Done with this address */
3173
3174 if (result == OK)
3175 {
3176 addr2->more_errno = deliver_time.tv_sec;
3177 addr2->delivery_usec = deliver_time.tv_usec;
3178 }
3179 post_process_one(addr2, result, logflags, EXIM_DTYPE_TRANSPORT, logchar);
3180
3181 /* If a pipe delivery generated text to be sent back, the result may be
3182 changed to FAIL, and we must copy this for subsequent addresses in the
3183 batch. */
3184
3185 if (addr2->transport_return != result)
3186 {
3187 for (addr3 = nextaddr; addr3; addr3 = addr3->next)
3188 {
3189 addr3->transport_return = addr2->transport_return;
3190 addr3->basic_errno = addr2->basic_errno;
3191 addr3->message = addr2->message;
3192 }
3193 result = addr2->transport_return;
3194 }
3195
3196 /* Whether or not the result was changed to FAIL, we need to copy the
3197 return_file value from the first address into all the addresses of the
3198 batch, so they are all listed in the error message. */
3199
3200 addr2->return_file = addr->return_file;
3201
3202 /* Change log character for recording successful deliveries. */
3203
3204 if (result == OK) logchar = '-';
3205 }
3206 } /* Loop back for next batch of addresses */
3207 }
3208
3209
3210
3211
3212 /*************************************************
3213 * Sort remote deliveries *
3214 *************************************************/
3215
3216 /* This function is called if remote_sort_domains is set. It arranges that the
3217 chain of addresses for remote deliveries is ordered according to the strings
3218 specified. Try to make this shuffling reasonably efficient by handling
3219 sequences of addresses rather than just single ones.
3220
3221 Arguments: None
3222 Returns: Nothing
3223 */
3224
3225 static void
3226 sort_remote_deliveries(void)
3227 {
3228 int sep = 0;
3229 address_item **aptr = &addr_remote;
3230 const uschar *listptr = remote_sort_domains;
3231 uschar *pattern;
3232 uschar patbuf[256];
3233
3234 while ( *aptr
3235 && (pattern = string_nextinlist(&listptr, &sep, patbuf, sizeof(patbuf)))
3236 )
3237 {
3238 address_item *moved = NULL;
3239 address_item **bptr = &moved;
3240
3241 while (*aptr)
3242 {
3243 address_item **next;
3244 deliver_domain = (*aptr)->domain; /* set $domain */
3245 if (match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1,
3246 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK)
3247 {
3248 aptr = &(*aptr)->next;
3249 continue;
3250 }
3251
3252 next = &(*aptr)->next;
3253 while ( *next
3254 && (deliver_domain = (*next)->domain, /* Set $domain */
3255 match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1,
3256 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL)) != OK
3257 )
3258 next = &(*next)->next;
3259
3260 /* If the batch of non-matchers is at the end, add on any that were
3261 extracted further up the chain, and end this iteration. Otherwise,
3262 extract them from the chain and hang on the moved chain. */
3263
3264 if (!*next)
3265 {
3266 *next = moved;
3267 break;
3268 }
3269
3270 *bptr = *aptr;
3271 *aptr = *next;
3272 *next = NULL;
3273 bptr = next;
3274 aptr = &(*aptr)->next;
3275 }
3276
3277 /* If the loop ended because the final address matched, *aptr will
3278 be NULL. Add on to the end any extracted non-matching addresses. If
3279 *aptr is not NULL, the loop ended via "break" when *next is null, that
3280 is, there was a string of non-matching addresses at the end. In this
3281 case the extracted addresses have already been added on the end. */
3282
3283 if (!*aptr) *aptr = moved;
3284 }
3285
3286 DEBUG(D_deliver)
3287 {
3288 address_item *addr;
3289 debug_printf("remote addresses after sorting:\n");
3290 for (addr = addr_remote; addr; addr = addr->next)
3291 debug_printf(" %s\n", addr->address);
3292 }
3293 }
3294
3295
3296
3297 /*************************************************
3298 * Read from pipe for remote delivery subprocess *
3299 *************************************************/
3300
3301 /* This function is called when the subprocess is complete, but can also be
3302 called before it is complete, in order to empty a pipe that is full (to prevent
3303 deadlock). It must therefore keep track of its progress in the parlist data
3304 block.
3305
3306 We read the pipe to get the delivery status codes and a possible error message
3307 for each address, optionally preceded by unusability data for the hosts and
3308 also by optional retry data.
3309
3310 Read in large chunks into the big buffer and then scan through, interpreting
3311 the data therein. In most cases, only a single read will be necessary. No
3312 individual item will ever be anywhere near 2500 bytes in length, so by ensuring
3313 that we read the next chunk when there is less than 2500 bytes left in the
3314 non-final chunk, we can assume each item is complete in the buffer before
3315 handling it. Each item is written using a single write(), which is atomic for
3316 small items (less than PIPE_BUF, which seems to be at least 512 in any Unix and
3317 often bigger) so even if we are reading while the subprocess is still going, we
3318 should never have only a partial item in the buffer.
3319
3320 hs12: This assumption is not true anymore, since we get quite large items (certificate
3321 information and such).
3322
3323 Argument:
3324 poffset the offset of the parlist item
3325 eop TRUE if the process has completed
3326
3327 Returns: TRUE if the terminating 'Z' item has been read,
3328 or there has been a disaster (i.e. no more data needed);
3329 FALSE otherwise
3330 */
3331
3332 static BOOL
3333 par_read_pipe(int poffset, BOOL eop)
3334 {
3335 host_item *h;
3336 pardata *p = parlist + poffset;
3337 address_item *addrlist = p->addrlist;
3338 address_item *addr = p->addr;
3339 pid_t pid = p->pid;
3340 int fd = p->fd;
3341
3342 uschar *msg = p->msg;
3343 BOOL done = p->done;
3344
3345 /* Loop through all items, reading from the pipe when necessary. The pipe
3346 used to be non-blocking. But I do not see a reason for using non-blocking I/O
3347 here, as the preceding select() tells us, if data is available for reading.
3348
3349 A read() on a "selected" handle should never block, but(!) it may return
3350 less data then we expected. (The buffer size we pass to read() shouldn't be
3351 understood as a "request", but as a "limit".)
3352
3353 Each separate item is written to the pipe in a timely manner. But, especially for
3354 larger items, the read(2) may already return partial data from the write(2).
3355
3356 The write is atomic mostly (depending on the amount written), but atomic does
3357 not imply "all or noting", it just is "not intermixed" with other writes on the
3358 same channel (pipe).
3359
3360 */
3361
3362 DEBUG(D_deliver) debug_printf("reading pipe for subprocess %d (%s)\n",
3363 (int)p->pid, eop? "ended" : "not ended yet");
3364
3365 while (!done)
3366 {
3367 retry_item *r, **rp;
3368 uschar pipeheader[PIPE_HEADER_SIZE+1];
3369 uschar *id = &pipeheader[0];
3370 uschar *subid = &pipeheader[1];
3371 uschar *ptr = big_buffer;
3372 size_t required = PIPE_HEADER_SIZE; /* first the pipehaeder, later the data */
3373 ssize_t got;
3374
3375 DEBUG(D_deliver) debug_printf(
3376 "expect %lu bytes (pipeheader) from tpt process %d\n", (u_long)required, pid);
3377
3378 /* We require(!) all the PIPE_HEADER_SIZE bytes here, as we know,
3379 they're written in a timely manner, so waiting for the write shouldn't hurt a lot.
3380 If we get less, we can assume the subprocess do be done and do not expect any further
3381 information from it. */
3382
3383 if ((got = readn(fd, pipeheader, required)) != required)
3384 {
3385 msg = string_sprintf("got " SSIZE_T_FMT " of %d bytes (pipeheader) "
3386 "from transport process %d for transport %s",
3387 got, PIPE_HEADER_SIZE, pid, addr->transport->driver_name);
3388 done = TRUE;
3389 break;
3390 }
3391
3392 pipeheader[PIPE_HEADER_SIZE] = '\0';
3393 DEBUG(D_deliver)
3394 debug_printf("got %ld bytes (pipeheader) from transport process %d\n",
3395 (long) got, pid);
3396
3397 {
3398 /* If we can't decode the pipeheader, the subprocess seems to have a
3399 problem, we do not expect any furher information from it. */
3400 char *endc;
3401 required = Ustrtol(pipeheader+2, &endc, 10);
3402 if (*endc)
3403 {
3404 msg = string_sprintf("failed to read pipe "
3405 "from transport process %d for transport %s: error decoding size from header",
3406 pid, addr->transport->driver_name);
3407 done = TRUE;
3408 break;
3409 }
3410 }
3411
3412 DEBUG(D_deliver)
3413 debug_printf("expect %lu bytes (pipedata) from transport process %d\n",
3414 (u_long)required, pid);
3415
3416 /* Same as above, the transport process will write the bytes announced
3417 in a timely manner, so we can just wait for the bytes, getting less than expected
3418 is considered a problem of the subprocess, we do not expect anything else from it. */
3419 if ((got = readn(fd, big_buffer, required)) != required)
3420 {
3421 msg = string_sprintf("got only " SSIZE_T_FMT " of " SIZE_T_FMT
3422 " bytes (pipedata) from transport process %d for transport %s",
3423 got, required, pid, addr->transport->driver_name);
3424 done = TRUE;
3425 break;
3426 }
3427
3428 /* Handle each possible type of item, assuming the complete item is
3429 available in store. */
3430
3431 switch (*id)
3432 {
3433 /* Host items exist only if any hosts were marked unusable. Match
3434 up by checking the IP address. */
3435
3436 case 'H':
3437 for (h = addrlist->host_list; h; h = h->next)
3438 {
3439 if (!h->address || Ustrcmp(h->address, ptr+2) != 0) continue;
3440 h->status = ptr[0];
3441 h->why = ptr[1];
3442 }
3443 ptr += 2;
3444 while (*ptr++);
3445 break;
3446
3447 /* Retry items are sent in a preceding R item for each address. This is
3448 kept separate to keep each message short enough to guarantee it won't
3449 be split in the pipe. Hopefully, in the majority of cases, there won't in
3450 fact be any retry items at all.
3451
3452 The complete set of retry items might include an item to delete a
3453 routing retry if there was a previous routing delay. However, routing
3454 retries are also used when a remote transport identifies an address error.
3455 In that case, there may also be an "add" item for the same key. Arrange
3456 that a "delete" item is dropped in favour of an "add" item. */
3457
3458 case 'R':
3459 if (!addr) goto ADDR_MISMATCH;
3460
3461 DEBUG(D_deliver|D_retry)
3462 debug_printf("reading retry information for %s from subprocess\n",
3463 ptr+1);
3464
3465 /* Cut out any "delete" items on the list. */
3466
3467 for (rp = &addr->retries; (r = *rp); rp = &r->next)
3468 if (Ustrcmp(r->key, ptr+1) == 0) /* Found item with same key */
3469 {
3470 if (!(r->flags & rf_delete)) break; /* It was not "delete" */
3471 *rp = r->next; /* Excise a delete item */
3472 DEBUG(D_deliver|D_retry)
3473 debug_printf(" existing delete item dropped\n");
3474 }
3475
3476 /* We want to add a delete item only if there is no non-delete item;
3477 however we still have to step ptr through the data. */
3478
3479 if (!r || !(*ptr & rf_delete))
3480 {
3481 r = store_get(sizeof(retry_item));
3482 r->next = addr->retries;
3483 addr->retries = r;
3484 r->flags = *ptr++;
3485 r->key = string_copy(ptr);
3486 while (*ptr++);
3487 memcpy(&r->basic_errno, ptr, sizeof(r->basic_errno));
3488 ptr += sizeof(r->basic_errno);
3489 memcpy(&r->more_errno, ptr, sizeof(r->more_errno));
3490 ptr += sizeof(r->more_errno);
3491 r->message = *ptr ? string_copy(ptr) : NULL;
3492 DEBUG(D_deliver|D_retry) debug_printf(" added %s item\n",
3493 r->flags & rf_delete ? "delete" : "retry");
3494 }
3495
3496 else
3497 {
3498 DEBUG(D_deliver|D_retry)
3499 debug_printf(" delete item not added: non-delete item exists\n");
3500 ptr++;
3501 while(*ptr++);
3502 ptr += sizeof(r->basic_errno) + sizeof(r->more_errno);
3503 }
3504
3505 while(*ptr++);
3506 break;
3507
3508 /* Put the amount of data written into the parlist block */
3509
3510 case 'S':
3511 memcpy(&(p->transport_count), ptr, sizeof(transport_count));
3512 ptr += sizeof(transport_count);
3513 break;
3514
3515 /* Address items are in the order of items on the address chain. We
3516 remember the current address value in case this function is called
3517 several times to empty the pipe in stages. Information about delivery
3518 over TLS is sent in a preceding X item for each address. We don't put
3519 it in with the other info, in order to keep each message short enough to
3520 guarantee it won't be split in the pipe. */
3521
3522 #ifdef SUPPORT_TLS
3523 case 'X':
3524 if (!addr) goto ADDR_MISMATCH; /* Below, in 'A' handler */
3525 switch (*subid)
3526 {
3527 case '1':
3528 addr->cipher = NULL;
3529 addr->peerdn = NULL;
3530
3531 if (*ptr)
3532 addr->cipher = string_copy(ptr);
3533 while (*ptr++);
3534 if (*ptr)
3535 addr->peerdn = string_copy(ptr);
3536 break;
3537
3538 case '2':
3539 if (*ptr)
3540 (void) tls_import_cert(ptr, &addr->peercert);
3541 else
3542 addr->peercert = NULL;
3543 break;
3544
3545 case '3':
3546 if (*ptr)
3547 (void) tls_import_cert(ptr, &addr->ourcert);
3548 else
3549 addr->ourcert = NULL;
3550 break;
3551
3552 # ifndef DISABLE_OCSP
3553 case '4':
3554 addr->ocsp = *ptr ? *ptr - '0' : OCSP_NOT_REQ;
3555 break;
3556 # endif
3557 }
3558 while (*ptr++);
3559 break;
3560 #endif /*SUPPORT_TLS*/
3561
3562 case 'C': /* client authenticator information */
3563 switch (*subid)
3564 {
3565 case '1': addr->authenticator = *ptr ? string_copy(ptr) : NULL; break;
3566 case '2': addr->auth_id = *ptr ? string_copy(ptr) : NULL; break;
3567 case '3': addr->auth_sndr = *ptr ? string_copy(ptr) : NULL; break;
3568 }
3569 while (*ptr++);
3570 break;
3571
3572 #ifndef DISABLE_PRDR
3573 case 'P':
3574 setflag(addr, af_prdr_used);
3575 break;
3576 #endif
3577
3578 case 'L':
3579 switch (*subid)
3580 {
3581 #ifdef EXPERIMENTAL_PIPE_CONNECT
3582 case 2: setflag(addr, af_early_pipe); /*FALLTHROUGH*/
3583 #endif
3584 case 1: setflag(addr, af_pipelining); break;
3585 }
3586 break;
3587
3588 case 'K':
3589 setflag(addr, af_chunking_used);
3590 break;
3591
3592 case 'T':
3593 setflag(addr, af_tcp_fastopen_conn);
3594 if (*subid > '0') setflag(addr, af_tcp_fastopen);
3595 if (*subid > '1') setflag(addr, af_tcp_fastopen_data);
3596 break;
3597
3598 case 'D':
3599 if (!addr) goto ADDR_MISMATCH;
3600 memcpy(&(addr->dsn_aware), ptr, sizeof(addr->dsn_aware));
3601 ptr += sizeof(addr->dsn_aware);
3602 DEBUG(D_deliver) debug_printf("DSN read: addr->dsn_aware = %d\n", addr->dsn_aware);
3603 break;
3604
3605 case 'A':
3606 if (!addr)
3607 {
3608 ADDR_MISMATCH:
3609 msg = string_sprintf("address count mismatch for data read from pipe "
3610 "for transport process %d for transport %s", pid,
3611 addrlist->transport->driver_name);
3612 done = TRUE;
3613 break;
3614 }
3615
3616 switch (*subid)
3617 {
3618 #ifdef SUPPORT_SOCKS
3619 case '2': /* proxy information; must arrive before A0 and applies to that addr XXX oops*/
3620 proxy_session = TRUE; /*XXX should this be cleared somewhere? */
3621 if (*ptr == 0)
3622 ptr++;
3623 else
3624 {
3625 proxy_local_address = string_copy(ptr);
3626 while(*ptr++);
3627 memcpy(&proxy_local_port, ptr, sizeof(proxy_local_port));
3628 ptr += sizeof(proxy_local_port);
3629 }
3630 break;
3631 #endif
3632
3633 #ifdef EXPERIMENTAL_DSN_INFO
3634 case '1': /* must arrive before A0, and applies to that addr */
3635 /* Two strings: smtp_greeting and helo_response */
3636 addr->smtp_greeting = string_copy(ptr);
3637 while(*ptr++);
3638 addr->helo_response = string_copy(ptr);
3639 while(*ptr++);
3640 break;
3641 #endif
3642
3643 case '0':
3644 DEBUG(D_deliver) debug_printf("A0 %s tret %d\n", addr->address, *ptr);
3645 addr->transport_return = *ptr++;
3646 addr->special_action = *ptr++;
3647 memcpy(&addr->basic_errno, ptr, sizeof(addr->basic_errno));
3648 ptr += sizeof(addr->basic_errno);
3649 memcpy(&addr->more_errno, ptr, sizeof(addr->more_errno));
3650 ptr += sizeof(addr->more_errno);
3651 memcpy(&addr->delivery_usec, ptr, sizeof(addr->delivery_usec));
3652 ptr += sizeof(addr->delivery_usec);
3653 memcpy(&addr->flags, ptr, sizeof(addr->flags));
3654 ptr += sizeof(addr->flags);
3655 addr->message = *ptr ? string_copy(ptr) : NULL;
3656 while(*ptr++);
3657 addr->user_message = *ptr ? string_copy(ptr) : NULL;
3658 while(*ptr++);
3659
3660 /* Always two strings for host information, followed by the port number and DNSSEC mark */
3661
3662 if (*ptr)
3663 {
3664 h = store_get(sizeof(host_item));
3665 h->name = string_copy(ptr);
3666 while (*ptr++);
3667 h->address = string_copy(ptr);
3668 while(*ptr++);
3669 memcpy(&h->port, ptr, sizeof(h->port));
3670 ptr += sizeof(h->port);
3671 h->dnssec = *ptr == '2' ? DS_YES
3672 : *ptr == '1' ? DS_NO
3673 : DS_UNK;
3674 ptr++;
3675 addr->host_used = h;
3676 }
3677 else ptr++;
3678
3679 /* Finished with this address */
3680
3681 addr = addr->next;
3682 break;
3683 }
3684 break;
3685
3686 /* Local interface address/port */
3687 case 'I':
3688 if (*ptr) sending_ip_address = string_copy(ptr);
3689 while (*ptr++) ;
3690 if (*ptr) sending_port = atoi(CS ptr);
3691 while (*ptr++) ;
3692 break;
3693
3694 /* Z marks the logical end of the data. It is followed by '0' if
3695 continue_transport was NULL at the end of transporting, otherwise '1'.
3696 We need to know when it becomes NULL during a delivery down a passed SMTP
3697 channel so that we don't try to pass anything more down it. Of course, for
3698 most normal messages it will remain NULL all the time. */
3699
3700 case 'Z':
3701 if (*ptr == '0')
3702 {
3703 continue_transport = NULL;
3704 continue_hostname = NULL;
3705 }
3706 done = TRUE;
3707 DEBUG(D_deliver) debug_printf("Z0%c item read\n", *ptr);
3708 break;
3709
3710 /* Anything else is a disaster. */
3711
3712 default:
3713 msg = string_sprintf("malformed data (%d) read from pipe for transport "
3714 "process %d for transport %s", ptr[-1], pid,
3715 addr->transport->driver_name);
3716 done = TRUE;
3717 break;
3718 }
3719 }
3720
3721 /* The done flag is inspected externally, to determine whether or not to
3722 call the function again when the process finishes. */
3723
3724 p->done = done;
3725
3726 /* If the process hadn't finished, and we haven't seen the end of the data
3727 or if we suffered a disaster, update the rest of the state, and return FALSE to
3728 indicate "not finished". */
3729
3730 if (!eop && !done)
3731 {
3732 p->addr = addr;
3733 p->msg = msg;
3734 return FALSE;
3735 }
3736
3737 /* Close our end of the pipe, to prevent deadlock if the far end is still
3738 pushing stuff into it. */
3739
3740 (void)close(fd);
3741 p->fd = -1;
3742
3743 /* If we have finished without error, but haven't had data for every address,
3744 something is wrong. */
3745
3746 if (!msg && addr)
3747 msg = string_sprintf("insufficient address data read from pipe "
3748 "for transport process %d for transport %s", pid,
3749 addr->transport->driver_name);
3750
3751 /* If an error message is set, something has gone wrong in getting back
3752 the delivery data. Put the message into each address and freeze it. */
3753
3754 if (msg)
3755 for (addr = addrlist; addr; addr = addr->next)
3756 {
3757 addr->transport_return = DEFER;
3758 addr->special_action = SPECIAL_FREEZE;
3759 addr->message = msg;
3760 log_write(0, LOG_MAIN|LOG_PANIC, "Delivery status for %s: %s\n", addr->address, addr->message);
3761 }
3762
3763 /* Return TRUE to indicate we have got all we need from this process, even
3764 if it hasn't actually finished yet. */
3765
3766 return TRUE;
3767 }
3768
3769
3770
3771 /*************************************************
3772 * Post-process a set of remote addresses *
3773 *************************************************/
3774
3775 /* Do what has to be done immediately after a remote delivery for each set of
3776 addresses, then re-write the spool if necessary. Note that post_process_one
3777 puts the address on an appropriate queue; hence we must fish off the next
3778 one first. This function is also called if there is a problem with setting
3779 up a subprocess to do a remote delivery in parallel. In this case, the final
3780 argument contains a message, and the action must be forced to DEFER.
3781
3782 Argument:
3783 addr pointer to chain of address items
3784 logflags flags for logging
3785 msg NULL for normal cases; -> error message for unexpected problems
3786 fallback TRUE if processing fallback hosts
3787
3788 Returns: nothing
3789 */
3790
3791 static void
3792 remote_post_process(address_item *addr, int logflags, uschar *msg,
3793 BOOL fallback)
3794 {
3795 host_item *h;
3796
3797 /* If any host addresses were found to be unusable, add them to the unusable
3798 tree so that subsequent deliveries don't try them. */
3799
3800 for (h = addr->host_list; h; h = h->next)
3801 if (h->address)
3802 if (h->status >= hstatus_unusable) tree_add_unusable(h);
3803
3804 /* Now handle each address on the chain. The transport has placed '=' or '-'
3805 into the special_action field for each successful delivery. */
3806
3807 while (addr)
3808 {
3809 address_item *next = addr->next;
3810
3811 /* If msg == NULL (normal processing) and the result is DEFER and we are
3812 processing the main hosts and there are fallback hosts available, put the
3813 address on the list for fallback delivery. */
3814
3815 if ( addr->transport_return == DEFER
3816 && addr->fallback_hosts
3817 && !fallback
3818 && !msg
3819 )
3820 {
3821 addr->host_list = addr->fallback_hosts;
3822 addr->next = addr_fallback;
3823 addr_fallback = addr;
3824 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", addr->address);
3825 }
3826
3827 /* If msg is set (=> unexpected problem), set it in the address before
3828 doing the ordinary post processing. */
3829
3830 else
3831 {
3832 if (msg)
3833 {
3834 addr->message = msg;
3835 addr->transport_return = DEFER;
3836 }
3837 (void)post_process_one(addr, addr->transport_return, logflags,
3838 EXIM_DTYPE_TRANSPORT, addr->special_action);
3839 }
3840
3841 /* Next address */
3842