1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2016 */
6 /* See the file NOTICE for conditions of use and distribution. */
8 /* The main code for delivering a message. */
12 #include "transports/smtp.h"
16 /* Data block for keeping track of subprocesses for parallel remote
19 typedef struct pardata {
20 address_item *addrlist; /* chain of addresses */
21 address_item *addr; /* next address data expected for */
22 pid_t pid; /* subprocess pid */
23 int fd; /* pipe fd for getting result from subprocess */
24 int transport_count; /* returned transport count value */
25 BOOL done; /* no more data needed */
26 uschar *msg; /* error message */
27 uschar *return_path; /* return_path for these addresses */
30 /* Values for the process_recipients variable */
32 enum { RECIP_ACCEPT, RECIP_IGNORE, RECIP_DEFER,
33 RECIP_FAIL, RECIP_FAIL_FILTER, RECIP_FAIL_TIMEOUT,
36 /* Mutually recursive functions for marking addresses done. */
38 static void child_done(address_item *, uschar *);
39 static void address_done(address_item *, uschar *);
41 /* Table for turning base-62 numbers into binary */
43 static uschar tab62[] =
44 {0,1,2,3,4,5,6,7,8,9,0,0,0,0,0,0, /* 0-9 */
45 0,10,11,12,13,14,15,16,17,18,19,20, /* A-K */
46 21,22,23,24,25,26,27,28,29,30,31,32, /* L-W */
47 33,34,35, 0, 0, 0, 0, 0, /* X-Z */
48 0,36,37,38,39,40,41,42,43,44,45,46, /* a-k */
49 47,48,49,50,51,52,53,54,55,56,57,58, /* l-w */
53 /*************************************************
54 * Local static variables *
55 *************************************************/
57 /* addr_duplicate is global because it needs to be seen from the Envelope-To
60 static address_item *addr_defer = NULL;
61 static address_item *addr_failed = NULL;
62 static address_item *addr_fallback = NULL;
63 static address_item *addr_local = NULL;
64 static address_item *addr_new = NULL;
65 static address_item *addr_remote = NULL;
66 static address_item *addr_route = NULL;
67 static address_item *addr_succeed = NULL;
68 static address_item *addr_dsntmp = NULL;
69 static address_item *addr_senddsn = NULL;
71 static FILE *message_log = NULL;
72 static BOOL update_spool;
73 static BOOL remove_journal;
74 static int parcount = 0;
75 static pardata *parlist = NULL;
76 static int return_count;
77 static uschar *frozen_info = US"";
78 static uschar *used_return_path = NULL;
82 /*************************************************
83 * Make a new address item *
84 *************************************************/
86 /* This function gets the store and initializes with default values. The
87 transport_return value defaults to DEFER, so that any unexpected failure to
88 deliver does not wipe out the message. The default unique string is set to a
89 copy of the address, so that its domain can be lowercased.
92 address the RFC822 address string
93 copy force a copy of the address
95 Returns: a pointer to an initialized address_item
99 deliver_make_addr(uschar *address, BOOL copy)
101 address_item *addr = store_get(sizeof(address_item));
102 *addr = address_defaults;
103 if (copy) address = string_copy(address);
104 addr->address = address;
105 addr->unique = string_copy(address);
112 /*************************************************
113 * Set expansion values for an address *
114 *************************************************/
116 /* Certain expansion variables are valid only when handling an address or
117 address list. This function sets them up or clears the values, according to its
121 addr the address in question, or NULL to clear values
126 deliver_set_expansions(address_item *addr)
130 const uschar ***p = address_expansions;
131 while (*p) **p++ = NULL;
135 /* Exactly what gets set depends on whether there is one or more addresses, and
136 what they contain. These first ones are always set, taking their values from
137 the first address. */
139 if (!addr->host_list)
141 deliver_host = deliver_host_address = US"";
142 deliver_host_port = 0;
146 deliver_host = addr->host_list->name;
147 deliver_host_address = addr->host_list->address;
148 deliver_host_port = addr->host_list->port;
151 deliver_recipients = addr;
152 deliver_address_data = addr->prop.address_data;
153 deliver_domain_data = addr->prop.domain_data;
154 deliver_localpart_data = addr->prop.localpart_data;
156 /* These may be unset for multiple addresses */
158 deliver_domain = addr->domain;
159 self_hostname = addr->self_hostname;
161 #ifdef EXPERIMENTAL_BRIGHTMAIL
162 bmi_deliver = 1; /* deliver by default */
163 bmi_alt_location = NULL;
164 bmi_base64_verdict = NULL;
165 bmi_base64_tracker_verdict = NULL;
168 /* If there's only one address we can set everything. */
172 address_item *addr_orig;
174 deliver_localpart = addr->local_part;
175 deliver_localpart_prefix = addr->prefix;
176 deliver_localpart_suffix = addr->suffix;
178 for (addr_orig = addr; addr_orig->parent; addr_orig = addr_orig->parent) ;
179 deliver_domain_orig = addr_orig->domain;
181 /* Re-instate any prefix and suffix in the original local part. In all
182 normal cases, the address will have a router associated with it, and we can
183 choose the caseful or caseless version accordingly. However, when a system
184 filter sets up a pipe, file, or autoreply delivery, no router is involved.
185 In this case, though, there won't be any prefix or suffix to worry about. */
187 deliver_localpart_orig = !addr_orig->router
188 ? addr_orig->local_part
189 : addr_orig->router->caseful_local_part
190 ? addr_orig->cc_local_part
191 : addr_orig->lc_local_part;
193 /* If there's a parent, make its domain and local part available, and if
194 delivering to a pipe or file, or sending an autoreply, get the local
195 part from the parent. For pipes and files, put the pipe or file string
196 into address_pipe and address_file. */
200 deliver_domain_parent = addr->parent->domain;
201 deliver_localpart_parent = !addr->parent->router
202 ? addr->parent->local_part
203 : addr->parent->router->caseful_local_part
204 ? addr->parent->cc_local_part
205 : addr->parent->lc_local_part;
207 /* File deliveries have their own flag because they need to be picked out
208 as special more often. */
210 if (testflag(addr, af_pfr))
212 if (testflag(addr, af_file)) address_file = addr->local_part;
213 else if (deliver_localpart[0] == '|') address_pipe = addr->local_part;
214 deliver_localpart = addr->parent->local_part;
215 deliver_localpart_prefix = addr->parent->prefix;
216 deliver_localpart_suffix = addr->parent->suffix;
220 #ifdef EXPERIMENTAL_BRIGHTMAIL
221 /* Set expansion variables related to Brightmail AntiSpam */
222 bmi_base64_verdict = bmi_get_base64_verdict(deliver_localpart_orig, deliver_domain_orig);
223 bmi_base64_tracker_verdict = bmi_get_base64_tracker_verdict(bmi_base64_verdict);
224 /* get message delivery status (0 - don't deliver | 1 - deliver) */
225 bmi_deliver = bmi_get_delivery_status(bmi_base64_verdict);
226 /* if message is to be delivered, get eventual alternate location */
227 if (bmi_deliver == 1)
228 bmi_alt_location = bmi_get_alt_location(bmi_base64_verdict);
233 /* For multiple addresses, don't set local part, and leave the domain and
234 self_hostname set only if it is the same for all of them. It is possible to
235 have multiple pipe and file addresses, but only when all addresses have routed
236 to the same pipe or file. */
241 if (testflag(addr, af_pfr))
243 if (testflag(addr, af_file)) address_file = addr->local_part;
244 else if (addr->local_part[0] == '|') address_pipe = addr->local_part;
246 for (addr2 = addr->next; addr2; addr2 = addr2->next)
248 if (deliver_domain && Ustrcmp(deliver_domain, addr2->domain) != 0)
249 deliver_domain = NULL;
251 && ( !addr2->self_hostname
252 || Ustrcmp(self_hostname, addr2->self_hostname) != 0
254 self_hostname = NULL;
255 if (!deliver_domain && !self_hostname) break;
263 /*************************************************
264 * Open a msglog file *
265 *************************************************/
267 /* This function is used both for normal message logs, and for files in the
268 msglog directory that are used to catch output from pipes. Try to create the
269 directory if it does not exist. From release 4.21, normal message logs should
270 be created when the message is received.
272 Called from deliver_message(), can be operating as root.
275 filename the file name
276 mode the mode required
277 error used for saying what failed
279 Returns: a file descriptor, or -1 (with errno set)
283 open_msglog_file(uschar *filename, int mode, uschar **error)
287 for (i = 2; i > 0; i--)
296 O_WRONLY|O_APPEND|O_CREAT, mode);
299 /* Set the close-on-exec flag and change the owner to the exim uid/gid (this
300 function is called as root). Double check the mode, because the group setting
301 doesn't always get set automatically. */
304 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
306 if (fchown(fd, exim_uid, exim_gid) < 0)
311 if (fchmod(fd, mode) < 0)
321 (void)directory_make(spool_directory,
322 spool_sname(US"msglog", message_subdir),
323 MSGLOG_DIRECTORY_MODE, TRUE);
333 /*************************************************
334 * Write to msglog if required *
335 *************************************************/
337 /* Write to the message log, if configured. This function may also be called
341 format a string format
347 deliver_msglog(const char *format, ...)
350 if (!message_logs) return;
351 va_start(ap, format);
352 vfprintf(message_log, format, ap);
360 /*************************************************
361 * Replicate status for batch *
362 *************************************************/
364 /* When a transport handles a batch of addresses, it may treat them
365 individually, or it may just put the status in the first one, and return FALSE,
366 requesting that the status be copied to all the others externally. This is the
367 replication function. As well as the status, it copies the transport pointer,
368 which may have changed if appendfile passed the addresses on to a different
371 Argument: pointer to the first address in a chain
376 replicate_status(address_item *addr)
379 for (addr2 = addr->next; addr2; addr2 = addr2->next)
381 addr2->transport = addr->transport;
382 addr2->transport_return = addr->transport_return;
383 addr2->basic_errno = addr->basic_errno;
384 addr2->more_errno = addr->more_errno;
385 addr2->delivery_usec = addr->delivery_usec;
386 addr2->special_action = addr->special_action;
387 addr2->message = addr->message;
388 addr2->user_message = addr->user_message;
394 /*************************************************
395 * Compare lists of hosts *
396 *************************************************/
398 /* This function is given two pointers to chains of host items, and it yields
399 TRUE if the lists refer to the same hosts in the same order, except that
401 (1) Multiple hosts with the same non-negative MX values are permitted to appear
402 in different orders. Round-robinning nameservers can cause this to happen.
404 (2) Multiple hosts with the same negative MX values less than MX_NONE are also
405 permitted to appear in different orders. This is caused by randomizing
408 This enables Exim to use a single SMTP transaction for sending to two entirely
409 different domains that happen to end up pointing at the same hosts.
412 one points to the first host list
413 two points to the second host list
415 Returns: TRUE if the lists refer to the same host set
419 same_hosts(host_item *one, host_item *two)
423 if (Ustrcmp(one->name, two->name) != 0)
426 host_item *end_one = one;
427 host_item *end_two = two;
429 /* Batch up only if there was no MX and the list was not randomized */
431 if (mx == MX_NONE) return FALSE;
433 /* Find the ends of the shortest sequence of identical MX values */
435 while ( end_one->next && end_one->next->mx == mx
436 && end_two->next && end_two->next->mx == mx)
438 end_one = end_one->next;
439 end_two = end_two->next;
442 /* If there aren't any duplicates, there's no match. */
444 if (end_one == one) return FALSE;
446 /* For each host in the 'one' sequence, check that it appears in the 'two'
447 sequence, returning FALSE if not. */
452 for (hi = two; hi != end_two->next; hi = hi->next)
453 if (Ustrcmp(one->name, hi->name) == 0) break;
454 if (hi == end_two->next) return FALSE;
455 if (one == end_one) break;
459 /* All the hosts in the 'one' sequence were found in the 'two' sequence.
460 Ensure both are pointing at the last host, and carry on as for equality. */
465 /* if the names matched but ports do not, mismatch */
466 else if (one->port != two->port)
475 /* True if both are NULL */
482 /*************************************************
483 * Compare header lines *
484 *************************************************/
486 /* This function is given two pointers to chains of header items, and it yields
487 TRUE if they are the same header texts in the same order.
490 one points to the first header list
491 two points to the second header list
493 Returns: TRUE if the lists refer to the same header set
497 same_headers(header_line *one, header_line *two)
499 for (;; one = one->next, two = two->next)
501 if (one == two) return TRUE; /* Includes the case where both NULL */
502 if (!one || !two) return FALSE;
503 if (Ustrcmp(one->text, two->text) != 0) return FALSE;
509 /*************************************************
510 * Compare string settings *
511 *************************************************/
513 /* This function is given two pointers to strings, and it returns
514 TRUE if they are the same pointer, or if the two strings are the same.
517 one points to the first string
518 two points to the second string
520 Returns: TRUE or FALSE
524 same_strings(uschar *one, uschar *two)
526 if (one == two) return TRUE; /* Includes the case where both NULL */
527 if (!one || !two) return FALSE;
528 return (Ustrcmp(one, two) == 0);
533 /*************************************************
534 * Compare uid/gid for addresses *
535 *************************************************/
537 /* This function is given a transport and two addresses. It yields TRUE if the
538 uid/gid/initgroups settings for the two addresses are going to be the same when
543 addr1 the first address
544 addr2 the second address
546 Returns: TRUE or FALSE
550 same_ugid(transport_instance *tp, address_item *addr1, address_item *addr2)
552 if ( !tp->uid_set && !tp->expand_uid
553 && !tp->deliver_as_creator
554 && ( testflag(addr1, af_uid_set) != testflag(addr2, af_gid_set)
555 || ( testflag(addr1, af_uid_set)
556 && ( addr1->uid != addr2->uid
557 || testflag(addr1, af_initgroups) != testflag(addr2, af_initgroups)
561 if ( !tp->gid_set && !tp->expand_gid
562 && ( testflag(addr1, af_gid_set) != testflag(addr2, af_gid_set)
563 || ( testflag(addr1, af_gid_set)
564 && addr1->gid != addr2->gid
574 /*************************************************
575 * Record that an address is complete *
576 *************************************************/
578 /* This function records that an address is complete. This is straightforward
579 for most addresses, where the unique address is just the full address with the
580 domain lower cased. For homonyms (addresses that are the same as one of their
581 ancestors) their are complications. Their unique addresses have \x\ prepended
582 (where x = 0, 1, 2...), so that de-duplication works correctly for siblings and
585 Exim used to record the unique addresses of homonyms as "complete". This,
586 however, fails when the pattern of redirection varies over time (e.g. if taking
587 unseen copies at only some times of day) because the prepended numbers may vary
588 from one delivery run to the next. This problem is solved by never recording
589 prepended unique addresses as complete. Instead, when a homonymic address has
590 actually been delivered via a transport, we record its basic unique address
591 followed by the name of the transport. This is checked in subsequent delivery
592 runs whenever an address is routed to a transport.
594 If the completed address is a top-level one (has no parent, which means it
595 cannot be homonymic) we also add the original address to the non-recipients
596 tree, so that it gets recorded in the spool file and therefore appears as
597 "done" in any spool listings. The original address may differ from the unique
598 address in the case of the domain.
600 Finally, this function scans the list of duplicates, marks as done any that
601 match this address, and calls child_done() for their ancestors.
604 addr address item that has been completed
605 now current time as a string
611 address_done(address_item *addr, uschar *now)
615 update_spool = TRUE; /* Ensure spool gets updated */
617 /* Top-level address */
621 tree_add_nonrecipient(addr->unique);
622 tree_add_nonrecipient(addr->address);
625 /* Homonymous child address */
627 else if (testflag(addr, af_homonym))
630 tree_add_nonrecipient(
631 string_sprintf("%s/%s", addr->unique + 3, addr->transport->name));
634 /* Non-homonymous child address */
636 else tree_add_nonrecipient(addr->unique);
638 /* Check the list of duplicate addresses and ensure they are now marked
641 for (dup = addr_duplicate; dup; dup = dup->next)
642 if (Ustrcmp(addr->unique, dup->unique) == 0)
644 tree_add_nonrecipient(dup->unique);
645 child_done(dup, now);
652 /*************************************************
653 * Decrease counts in parents and mark done *
654 *************************************************/
656 /* This function is called when an address is complete. If there is a parent
657 address, its count of children is decremented. If there are still other
658 children outstanding, the function exits. Otherwise, if the count has become
659 zero, address_done() is called to mark the parent and its duplicates complete.
660 Then loop for any earlier ancestors.
663 addr points to the completed address item
664 now the current time as a string, for writing to the message log
670 child_done(address_item *addr, uschar *now)
676 if (--addr->child_count > 0) return; /* Incomplete parent */
677 address_done(addr, now);
679 /* Log the completion of all descendents only when there is no ancestor with
680 the same original address. */
682 for (aa = addr->parent; aa; aa = aa->parent)
683 if (Ustrcmp(aa->address, addr->address) == 0) break;
686 deliver_msglog("%s %s: children all complete\n", now, addr->address);
687 DEBUG(D_deliver) debug_printf("%s: children all complete\n", addr->address);
693 /*************************************************
694 * Delivery logging support functions *
695 *************************************************/
697 /* The LOGGING() checks in d_log_interface() are complicated for backwards
698 compatibility. When outgoing interface logging was originally added, it was
699 conditional on just incoming_interface (which is off by default). The
700 outgoing_interface option is on by default to preserve this behaviour, but
701 you can enable incoming_interface and disable outgoing_interface to get I=
702 fields on incoming lines only.
705 s The log line buffer
706 sizep Pointer to the buffer size
707 ptrp Pointer to current index into buffer
708 addr The address to be logged
710 Returns: New value for s
714 d_log_interface(uschar *s, int *sizep, int *ptrp)
716 if (LOGGING(incoming_interface) && LOGGING(outgoing_interface)
717 && sending_ip_address)
719 s = string_append(s, sizep, ptrp, 2, US" I=[", sending_ip_address);
720 s = LOGGING(outgoing_port)
721 ? string_append(s, sizep, ptrp, 2, US"]:",
722 string_sprintf("%d", sending_port))
723 : string_catn(s, sizep, ptrp, US"]", 1);
731 d_hostlog(uschar * s, int * sp, int * pp, address_item * addr)
733 host_item * h = addr->host_used;
735 s = string_append(s, sp, pp, 2, US" H=", h->name);
737 if (LOGGING(dnssec) && h->dnssec == DS_YES)
738 s = string_catn(s, sp, pp, US" DS", 3);
740 s = string_append(s, sp, pp, 3, US" [", h->address, US"]");
742 if (LOGGING(outgoing_port))
743 s = string_append(s, sp, pp, 2, US":", string_sprintf("%d", h->port));
746 if (LOGGING(proxy) && proxy_local_address)
748 s = string_append(s, sp, pp, 3, US" PRX=[", proxy_local_address, US"]");
749 if (LOGGING(outgoing_port))
750 s = string_append(s, sp, pp, 2, US":", string_sprintf("%d",
755 s = d_log_interface(s, sp, pp);
757 if (testflag(addr, af_tcp_fastopen))
758 s = string_catn(s, sp, pp, US" TFO", 4);
769 d_tlslog(uschar * s, int * sizep, int * ptrp, address_item * addr)
771 if (LOGGING(tls_cipher) && addr->cipher)
772 s = string_append(s, sizep, ptrp, 2, US" X=", addr->cipher);
773 if (LOGGING(tls_certificate_verified) && addr->cipher)
774 s = string_append(s, sizep, ptrp, 2, US" CV=",
775 testflag(addr, af_cert_verified)
777 #ifdef EXPERIMENTAL_DANE
778 testflag(addr, af_dane_verified)
784 if (LOGGING(tls_peerdn) && addr->peerdn)
785 s = string_append(s, sizep, ptrp, 3, US" DN=\"",
786 string_printing(addr->peerdn), US"\"");
794 #ifndef DISABLE_EVENT
796 event_raise(uschar * action, const uschar * event, uschar * ev_data)
802 debug_printf("Event(%s): event_action=|%s| delivery_IP=%s\n",
804 action, deliver_host_address);
807 event_data = ev_data;
809 if (!(s = expand_string(action)) && *expand_string_message)
810 log_write(0, LOG_MAIN|LOG_PANIC,
811 "failed to expand event_action %s in %s: %s\n",
812 event, transport_name, expand_string_message);
814 event_name = event_data = NULL;
816 /* If the expansion returns anything but an empty string, flag for
817 the caller to modify his normal processing
822 debug_printf("Event(%s): event_action returned \"%s\"\n", event, s);
830 msg_event_raise(const uschar * event, const address_item * addr)
832 const uschar * save_domain = deliver_domain;
833 uschar * save_local = deliver_localpart;
834 const uschar * save_host = deliver_host;
835 const uschar * save_address = deliver_host_address;
836 const int save_port = deliver_host_port;
838 if (!addr->transport)
841 router_name = addr->router ? addr->router->name : NULL;
842 transport_name = addr->transport->name;
843 deliver_domain = addr->domain;
844 deliver_localpart = addr->local_part;
845 deliver_host = addr->host_used ? addr->host_used->name : NULL;
847 (void) event_raise(addr->transport->event_action, event,
849 || Ustrcmp(addr->transport->driver_name, "smtp") == 0
850 || Ustrcmp(addr->transport->driver_name, "lmtp") == 0
851 ? addr->message : NULL);
853 deliver_host_port = save_port;
854 deliver_host_address = save_address;
855 deliver_host = save_host;
856 deliver_localpart = save_local;
857 deliver_domain = save_domain;
858 router_name = transport_name = NULL;
860 #endif /*DISABLE_EVENT*/
864 /******************************************************************************/
867 /*************************************************
868 * Generate local prt for logging *
869 *************************************************/
871 /* This function is a subroutine for use in string_log_address() below.
874 addr the address being logged
875 yield the current dynamic buffer pointer
876 sizeptr points to current size
877 ptrptr points to current insert pointer
879 Returns: the new value of the buffer pointer
883 string_get_localpart(address_item *addr, uschar *yield, int *sizeptr,
889 if (testflag(addr, af_include_affixes) && s)
892 if (testflag(addr, af_utf8_downcvt))
893 s = string_localpart_utf8_to_alabel(s, NULL);
895 yield = string_cat(yield, sizeptr, ptrptr, s);
898 s = addr->local_part;
900 if (testflag(addr, af_utf8_downcvt))
901 s = string_localpart_utf8_to_alabel(s, NULL);
903 yield = string_cat(yield, sizeptr, ptrptr, s);
906 if (testflag(addr, af_include_affixes) && s)
909 if (testflag(addr, af_utf8_downcvt))
910 s = string_localpart_utf8_to_alabel(s, NULL);
912 yield = string_cat(yield, sizeptr, ptrptr, s);
919 /*************************************************
920 * Generate log address list *
921 *************************************************/
923 /* This function generates a list consisting of an address and its parents, for
924 use in logging lines. For saved onetime aliased addresses, the onetime parent
925 field is used. If the address was delivered by a transport with rcpt_include_
926 affixes set, the af_include_affixes bit will be set in the address. In that
927 case, we include the affixes here too.
930 str points to start of growing string, or NULL
931 size points to current allocation for string
932 ptr points to offset for append point; updated on exit
933 addr bottom (ultimate) address
934 all_parents if TRUE, include all parents
935 success TRUE for successful delivery
937 Returns: a growable string in dynamic store
941 string_log_address(uschar * str, int * size, int * ptr,
942 address_item *addr, BOOL all_parents, BOOL success)
944 BOOL add_topaddr = TRUE;
945 address_item *topaddr;
947 /* Find the ultimate parent */
949 for (topaddr = addr; topaddr->parent; topaddr = topaddr->parent) ;
951 /* We start with just the local part for pipe, file, and reply deliveries, and
952 for successful local deliveries from routers that have the log_as_local flag
953 set. File deliveries from filters can be specified as non-absolute paths in
954 cases where the transport is going to complete the path. If there is an error
955 before this happens (expansion failure) the local part will not be updated, and
956 so won't necessarily look like a path. Add extra text for this case. */
958 if ( testflag(addr, af_pfr)
960 && addr->router && addr->router->log_as_local
961 && addr->transport && addr->transport->info->local
964 if (testflag(addr, af_file) && addr->local_part[0] != '/')
965 str = string_catn(str, size, ptr, CUS"save ", 5);
966 str = string_get_localpart(addr, str, size, ptr);
969 /* Other deliveries start with the full address. It we have split it into local
970 part and domain, use those fields. Some early failures can happen before the
971 splitting is done; in those cases use the original field. */
975 uschar * cmp = str + *ptr;
977 if (addr->local_part)
980 str = string_get_localpart(addr, str, size, ptr);
981 str = string_catn(str, size, ptr, US"@", 1);
984 if (testflag(addr, af_utf8_downcvt))
985 s = string_localpart_utf8_to_alabel(s, NULL);
987 str = string_cat(str, size, ptr, s);
990 str = string_cat(str, size, ptr, addr->address);
992 /* If the address we are going to print is the same as the top address,
993 and all parents are not being included, don't add on the top address. First
994 of all, do a caseless comparison; if this succeeds, do a caseful comparison
995 on the local parts. */
998 if ( strcmpic(cmp, topaddr->address) == 0
999 && Ustrncmp(cmp, topaddr->address, Ustrchr(cmp, '@') - cmp) == 0
1000 && !addr->onetime_parent
1001 && (!all_parents || !addr->parent || addr->parent == topaddr)
1003 add_topaddr = FALSE;
1006 /* If all parents are requested, or this is a local pipe/file/reply, and
1007 there is at least one intermediate parent, show it in brackets, and continue
1008 with all of them if all are wanted. */
1010 if ( (all_parents || testflag(addr, af_pfr))
1012 && addr->parent != topaddr)
1015 address_item *addr2;
1016 for (addr2 = addr->parent; addr2 != topaddr; addr2 = addr2->parent)
1018 str = string_catn(str, size, ptr, s, 2);
1019 str = string_cat (str, size, ptr, addr2->address);
1020 if (!all_parents) break;
1023 str = string_catn(str, size, ptr, US")", 1);
1026 /* Add the top address if it is required */
1029 str = string_append(str, size, ptr, 3,
1031 addr->onetime_parent ? addr->onetime_parent : topaddr->address,
1040 timesince(struct timeval * diff, struct timeval * then)
1042 gettimeofday(diff, NULL);
1043 diff->tv_sec -= then->tv_sec;
1044 if ((diff->tv_usec -= then->tv_usec) < 0)
1047 diff->tv_usec += 1000*1000;
1054 string_timediff(struct timeval * diff)
1056 static uschar buf[sizeof("0.000s")];
1058 if (diff->tv_sec >= 5 || !LOGGING(millisec))
1059 return readconf_printtime((int)diff->tv_sec);
1061 sprintf(CS buf, "%d.%03ds", (int)diff->tv_sec, (int)diff->tv_usec/1000);
1067 string_timesince(struct timeval * then)
1069 struct timeval diff;
1071 timesince(&diff, then);
1072 return string_timediff(&diff);
1075 /******************************************************************************/
1079 /* If msg is NULL this is a delivery log and logchar is used. Otherwise
1080 this is a nonstandard call; no two-character delivery flag is written
1081 but sender-host and sender are prefixed and "msg" is inserted in the log line.
1084 flags passed to log_write()
1087 delivery_log(int flags, address_item * addr, int logchar, uschar * msg)
1089 int size = 256; /* Used for a temporary, */
1090 int ptr = 0; /* expanding buffer, for */
1091 uschar * s; /* building log lines; */
1092 void * reset_point; /* released afterwards. */
1094 /* Log the delivery on the main log. We use an extensible string to build up
1095 the log line, and reset the store afterwards. Remote deliveries should always
1096 have a pointer to the host item that succeeded; local deliveries can have a
1097 pointer to a single host item in their host list, for use by the transport. */
1099 #ifndef DISABLE_EVENT
1100 /* presume no successful remote delivery */
1101 lookup_dnssec_authenticated = NULL;
1104 s = reset_point = store_get(size);
1107 s = string_append(s, &size, &ptr, 2, host_and_ident(TRUE), US" ");
1111 s = string_catn(s, &size, &ptr, US"> ", 2);
1113 s = string_log_address(s, &size, &ptr, addr, LOGGING(all_parents), TRUE);
1115 if (LOGGING(sender_on_delivery) || msg)
1116 s = string_append(s, &size, &ptr, 3, US" F=<",
1118 testflag(addr, af_utf8_downcvt)
1119 ? string_address_utf8_to_alabel(sender_address, NULL)
1126 s = string_append(s, &size, &ptr, 2, US" Q=", queue_name);
1128 #ifdef EXPERIMENTAL_SRS
1129 if(addr->prop.srs_sender)
1130 s = string_append(s, &size, &ptr, 3, US" SRS=<", addr->prop.srs_sender, US">");
1133 /* You might think that the return path must always be set for a successful
1134 delivery; indeed, I did for some time, until this statement crashed. The case
1135 when it is not set is for a delivery to /dev/null which is optimised by not
1136 being run at all. */
1138 if (used_return_path && LOGGING(return_path_on_delivery))
1139 s = string_append(s, &size, &ptr, 3, US" P=<", used_return_path, US">");
1142 s = string_append(s, &size, &ptr, 2, US" ", msg);
1144 /* For a delivery from a system filter, there may not be a router */
1146 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
1148 s = string_append(s, &size, &ptr, 2, US" T=", addr->transport->name);
1150 if (LOGGING(delivery_size))
1151 s = string_append(s, &size, &ptr, 2, US" S=",
1152 string_sprintf("%d", transport_count));
1154 /* Local delivery */
1156 if (addr->transport->info->local)
1158 if (addr->host_list)
1159 s = string_append(s, &size, &ptr, 2, US" H=", addr->host_list->name);
1160 s = d_log_interface(s, &size, &ptr);
1161 if (addr->shadow_message)
1162 s = string_cat(s, &size, &ptr, addr->shadow_message);
1165 /* Remote delivery */
1169 if (addr->host_used)
1171 s = d_hostlog(s, &size, &ptr, addr);
1172 if (continue_sequence > 1)
1173 s = string_catn(s, &size, &ptr, US"*", 1);
1175 #ifndef DISABLE_EVENT
1176 deliver_host_address = addr->host_used->address;
1177 deliver_host_port = addr->host_used->port;
1178 deliver_host = addr->host_used->name;
1180 /* DNS lookup status */
1181 lookup_dnssec_authenticated = addr->host_used->dnssec==DS_YES ? US"yes"
1182 : addr->host_used->dnssec==DS_NO ? US"no"
1188 s = d_tlslog(s, &size, &ptr, addr);
1191 if (addr->authenticator)
1193 s = string_append(s, &size, &ptr, 2, US" A=", addr->authenticator);
1196 s = string_append(s, &size, &ptr, 2, US":", addr->auth_id);
1197 if (LOGGING(smtp_mailauth) && addr->auth_sndr)
1198 s = string_append(s, &size, &ptr, 2, US":", addr->auth_sndr);
1202 #ifndef DISABLE_PRDR
1203 if (testflag(addr, af_prdr_used))
1204 s = string_catn(s, &size, &ptr, US" PRDR", 5);
1207 if (testflag(addr, af_chunking_used))
1208 s = string_catn(s, &size, &ptr, US" K", 2);
1211 /* confirmation message (SMTP (host_used) and LMTP (driver_name)) */
1213 if ( LOGGING(smtp_confirmation)
1215 && (addr->host_used || Ustrcmp(addr->transport->driver_name, "lmtp") == 0)
1219 unsigned lim = big_buffer_size < 1024 ? big_buffer_size : 1024;
1220 uschar *p = big_buffer;
1221 uschar *ss = addr->message;
1223 for (i = 0; i < lim && ss[i] != 0; i++) /* limit logged amount */
1225 if (ss[i] == '\"' || ss[i] == '\\') *p++ = '\\'; /* quote \ and " */
1230 s = string_append(s, &size, &ptr, 2, US" C=", big_buffer);
1233 /* Time on queue and actual time taken to deliver */
1235 if (LOGGING(queue_time))
1236 s = string_append(s, &size, &ptr, 2, US" QT=",
1237 string_timesince(&received_time));
1239 if (LOGGING(deliver_time))
1241 struct timeval diff = {.tv_sec = addr->more_errno, .tv_usec = addr->delivery_usec};
1242 s = string_append(s, &size, &ptr, 2, US" DT=", string_timediff(&diff));
1245 /* string_cat() always leaves room for the terminator. Release the
1246 store we used to build the line after writing it. */
1249 log_write(0, flags, "%s", s);
1251 #ifndef DISABLE_EVENT
1252 if (!msg) msg_event_raise(US"msg:delivery", addr);
1255 store_reset(reset_point);
1262 deferral_log(address_item * addr, uschar * now,
1263 int logflags, uschar * driver_name, uschar * driver_kind)
1265 int size = 256; /* Used for a temporary, */
1266 int ptr = 0; /* expanding buffer, for */
1267 uschar * s; /* building log lines; */
1268 void * reset_point; /* released afterwards. */
1272 /* Build up the line that is used for both the message log and the main
1275 s = reset_point = store_get(size);
1277 /* Create the address string for logging. Must not do this earlier, because
1278 an OK result may be changed to FAIL when a pipe returns text. */
1280 s = string_log_address(s, &size, &ptr, addr, LOGGING(all_parents), FALSE);
1283 s = string_append(s, &size, &ptr, 2, US" Q=", queue_name);
1285 /* Either driver_name contains something and driver_kind contains
1286 " router" or " transport" (note the leading space), or driver_name is
1287 a null string and driver_kind contains "routing" without the leading
1288 space, if all routing has been deferred. When a domain has been held,
1289 so nothing has been done at all, both variables contain null strings. */
1293 if (driver_kind[1] == 't' && addr->router)
1294 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
1296 ss[1] = toupper(driver_kind[1]);
1297 s = string_append(s, &size, &ptr, 2, ss, driver_name);
1299 else if (driver_kind)
1300 s = string_append(s, &size, &ptr, 2, US" ", driver_kind);
1302 /*XXX need an s+s+p sprintf */
1303 sprintf(CS ss, " defer (%d)", addr->basic_errno);
1304 s = string_cat(s, &size, &ptr, ss);
1306 if (addr->basic_errno > 0)
1307 s = string_append(s, &size, &ptr, 2, US": ",
1308 US strerror(addr->basic_errno));
1310 if (addr->host_used)
1312 s = string_append(s, &size, &ptr, 5,
1313 US" H=", addr->host_used->name,
1314 US" [", addr->host_used->address, US"]");
1315 if (LOGGING(outgoing_port))
1317 int port = addr->host_used->port;
1318 s = string_append(s, &size, &ptr, 2,
1319 US":", port == PORT_NONE ? US"25" : string_sprintf("%d", port));
1324 s = string_append(s, &size, &ptr, 2, US": ", addr->message);
1328 /* Log the deferment in the message log, but don't clutter it
1329 up with retry-time defers after the first delivery attempt. */
1331 if (deliver_firsttime || addr->basic_errno > ERRNO_RETRY_BASE)
1332 deliver_msglog("%s %s\n", now, s);
1334 /* Write the main log and reset the store.
1335 For errors of the type "retry time not reached" (also remotes skipped
1336 on queue run), logging is controlled by L_retry_defer. Note that this kind
1337 of error number is negative, and all the retry ones are less than any
1341 log_write(addr->basic_errno <= ERRNO_RETRY_BASE ? L_retry_defer : 0, logflags,
1344 store_reset(reset_point);
1351 failure_log(address_item * addr, uschar * driver_kind, uschar * now)
1353 int size = 256; /* Used for a temporary, */
1354 int ptr = 0; /* expanding buffer, for */
1355 uschar * s; /* building log lines; */
1356 void * reset_point; /* released afterwards. */
1358 /* Build up the log line for the message and main logs */
1360 s = reset_point = store_get(size);
1362 /* Create the address string for logging. Must not do this earlier, because
1363 an OK result may be changed to FAIL when a pipe returns text. */
1365 s = string_log_address(s, &size, &ptr, addr, LOGGING(all_parents), FALSE);
1367 if (LOGGING(sender_on_delivery))
1368 s = string_append(s, &size, &ptr, 3, US" F=<", sender_address, US">");
1371 s = string_append(s, &size, &ptr, 2, US" Q=", queue_name);
1373 /* Return path may not be set if no delivery actually happened */
1375 if (used_return_path && LOGGING(return_path_on_delivery))
1376 s = string_append(s, &size, &ptr, 3, US" P=<", used_return_path, US">");
1379 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
1380 if (addr->transport)
1381 s = string_append(s, &size, &ptr, 2, US" T=", addr->transport->name);
1383 if (addr->host_used)
1384 s = d_hostlog(s, &size, &ptr, addr);
1387 s = d_tlslog(s, &size, &ptr, addr);
1390 if (addr->basic_errno > 0)
1391 s = string_append(s, &size, &ptr, 2, US": ", US strerror(addr->basic_errno));
1394 s = string_append(s, &size, &ptr, 2, US": ", addr->message);
1398 /* Do the logging. For the message log, "routing failed" for those cases,
1399 just to make it clearer. */
1402 deliver_msglog("%s %s failed for %s\n", now, driver_kind, s);
1404 deliver_msglog("%s %s\n", now, s);
1406 log_write(0, LOG_MAIN, "** %s", s);
1408 #ifndef DISABLE_EVENT
1409 msg_event_raise(US"msg:fail:delivery", addr);
1412 store_reset(reset_point);
1418 /*************************************************
1419 * Actions at the end of handling an address *
1420 *************************************************/
1422 /* This is a function for processing a single address when all that can be done
1423 with it has been done.
1426 addr points to the address block
1427 result the result of the delivery attempt
1428 logflags flags for log_write() (LOG_MAIN and/or LOG_PANIC)
1429 driver_type indicates which type of driver (transport, or router) was last
1430 to process the address
1431 logchar '=' or '-' for use when logging deliveries with => or ->
1437 post_process_one(address_item *addr, int result, int logflags, int driver_type,
1440 uschar *now = tod_stamp(tod_log);
1441 uschar *driver_kind = NULL;
1442 uschar *driver_name = NULL;
1444 DEBUG(D_deliver) debug_printf("post-process %s (%d)\n", addr->address, result);
1446 /* Set up driver kind and name for logging. Disable logging if the router or
1447 transport has disabled it. */
1449 if (driver_type == DTYPE_TRANSPORT)
1451 if (addr->transport)
1453 driver_name = addr->transport->name;
1454 driver_kind = US" transport";
1455 disable_logging = addr->transport->disable_logging;
1457 else driver_kind = US"transporting";
1459 else if (driver_type == DTYPE_ROUTER)
1463 driver_name = addr->router->name;
1464 driver_kind = US" router";
1465 disable_logging = addr->router->disable_logging;
1467 else driver_kind = US"routing";
1470 /* If there's an error message set, ensure that it contains only printing
1471 characters - it should, but occasionally things slip in and this at least
1472 stops the log format from getting wrecked. We also scan the message for an LDAP
1473 expansion item that has a password setting, and flatten the password. This is a
1474 fudge, but I don't know a cleaner way of doing this. (If the item is badly
1475 malformed, it won't ever have gone near LDAP.) */
1479 const uschar * s = string_printing(addr->message);
1481 /* deconst cast ok as string_printing known to have alloc'n'copied */
1482 addr->message = expand_hide_passwords(US s);
1485 /* If we used a transport that has one of the "return_output" options set, and
1486 if it did in fact generate some output, then for return_output we treat the
1487 message as failed if it was not already set that way, so that the output gets
1488 returned to the sender, provided there is a sender to send it to. For
1489 return_fail_output, do this only if the delivery failed. Otherwise we just
1490 unlink the file, and remove the name so that if the delivery failed, we don't
1491 try to send back an empty or unwanted file. The log_output options operate only
1492 on a non-empty file.
1494 In any case, we close the message file, because we cannot afford to leave a
1495 file-descriptor for one address while processing (maybe very many) others. */
1497 if (addr->return_file >= 0 && addr->return_filename)
1499 BOOL return_output = FALSE;
1500 struct stat statbuf;
1501 (void)EXIMfsync(addr->return_file);
1503 /* If there is no output, do nothing. */
1505 if (fstat(addr->return_file, &statbuf) == 0 && statbuf.st_size > 0)
1507 transport_instance *tb = addr->transport;
1509 /* Handle logging options */
1512 || result == FAIL && tb->log_fail_output
1513 || result == DEFER && tb->log_defer_output
1517 FILE *f = Ufopen(addr->return_filename, "rb");
1519 log_write(0, LOG_MAIN|LOG_PANIC, "failed to open %s to log output "
1520 "from %s transport: %s", addr->return_filename, tb->name,
1523 if ((s = US Ufgets(big_buffer, big_buffer_size, f)))
1525 uschar *p = big_buffer + Ustrlen(big_buffer);
1527 while (p > big_buffer && isspace(p[-1])) p--;
1529 sp = string_printing(big_buffer);
1530 log_write(0, LOG_MAIN, "<%s>: %s transport output: %s",
1531 addr->address, tb->name, sp);
1536 /* Handle returning options, but only if there is an address to return
1539 if (sender_address[0] != 0 || addr->prop.errors_address)
1540 if (tb->return_output)
1542 addr->transport_return = result = FAIL;
1543 if (addr->basic_errno == 0 && !addr->message)
1544 addr->message = US"return message generated";
1545 return_output = TRUE;
1548 if (tb->return_fail_output && result == FAIL) return_output = TRUE;
1551 /* Get rid of the file unless it might be returned, but close it in
1556 Uunlink(addr->return_filename);
1557 addr->return_filename = NULL;
1558 addr->return_file = -1;
1561 (void)close(addr->return_file);
1564 /* The success case happens only after delivery by a transport. */
1568 addr->next = addr_succeed;
1569 addr_succeed = addr;
1571 /* Call address_done() to ensure that we don't deliver to this address again,
1572 and write appropriate things to the message log. If it is a child address, we
1573 call child_done() to scan the ancestors and mark them complete if this is the
1574 last child to complete. */
1576 address_done(addr, now);
1577 DEBUG(D_deliver) debug_printf("%s delivered\n", addr->address);
1580 deliver_msglog("%s %s: %s%s succeeded\n", now, addr->address,
1581 driver_name, driver_kind);
1584 deliver_msglog("%s %s <%s>: %s%s succeeded\n", now, addr->address,
1585 addr->parent->address, driver_name, driver_kind);
1586 child_done(addr, now);
1589 /* Certificates for logging (via events) */
1591 tls_out.ourcert = addr->ourcert;
1592 addr->ourcert = NULL;
1593 tls_out.peercert = addr->peercert;
1594 addr->peercert = NULL;
1596 tls_out.cipher = addr->cipher;
1597 tls_out.peerdn = addr->peerdn;
1598 tls_out.ocsp = addr->ocsp;
1599 # ifdef EXPERIMENTAL_DANE
1600 tls_out.dane_verified = testflag(addr, af_dane_verified);
1604 delivery_log(LOG_MAIN, addr, logchar, NULL);
1607 tls_free_cert(&tls_out.ourcert);
1608 tls_free_cert(&tls_out.peercert);
1609 tls_out.cipher = NULL;
1610 tls_out.peerdn = NULL;
1611 tls_out.ocsp = OCSP_NOT_REQ;
1612 # ifdef EXPERIMENTAL_DANE
1613 tls_out.dane_verified = FALSE;
1619 /* Soft failure, or local delivery process failed; freezing may be
1622 else if (result == DEFER || result == PANIC)
1624 if (result == PANIC) logflags |= LOG_PANIC;
1626 /* This puts them on the chain in reverse order. Do not change this, because
1627 the code for handling retries assumes that the one with the retry
1628 information is last. */
1630 addr->next = addr_defer;
1633 /* The only currently implemented special action is to freeze the
1634 message. Logging of this is done later, just before the -H file is
1637 if (addr->special_action == SPECIAL_FREEZE)
1639 deliver_freeze = TRUE;
1640 deliver_frozen_at = time(NULL);
1641 update_spool = TRUE;
1644 /* If doing a 2-stage queue run, we skip writing to either the message
1645 log or the main log for SMTP defers. */
1647 if (!queue_2stage || addr->basic_errno != 0)
1648 deferral_log(addr, now, logflags, driver_name, driver_kind);
1652 /* Hard failure. If there is an address to which an error message can be sent,
1653 put this address on the failed list. If not, put it on the deferred list and
1654 freeze the mail message for human attention. The latter action can also be
1655 explicitly requested by a router or transport. */
1659 /* If this is a delivery error, or a message for which no replies are
1660 wanted, and the message's age is greater than ignore_bounce_errors_after,
1661 force the af_ignore_error flag. This will cause the address to be discarded
1662 later (with a log entry). */
1664 if (!*sender_address && message_age >= ignore_bounce_errors_after)
1665 addr->prop.ignore_error = TRUE;
1667 /* Freeze the message if requested, or if this is a bounce message (or other
1668 message with null sender) and this address does not have its own errors
1669 address. However, don't freeze if errors are being ignored. The actual code
1670 to ignore occurs later, instead of sending a message. Logging of freezing
1671 occurs later, just before writing the -H file. */
1673 if ( !addr->prop.ignore_error
1674 && ( addr->special_action == SPECIAL_FREEZE
1675 || (sender_address[0] == 0 && !addr->prop.errors_address)
1678 frozen_info = addr->special_action == SPECIAL_FREEZE
1680 : sender_local && !local_error_message
1681 ? US" (message created with -f <>)"
1682 : US" (delivery error message)";
1683 deliver_freeze = TRUE;
1684 deliver_frozen_at = time(NULL);
1685 update_spool = TRUE;
1687 /* The address is put on the defer rather than the failed queue, because
1688 the message is being retained. */
1690 addr->next = addr_defer;
1694 /* Don't put the address on the nonrecipients tree yet; wait until an
1695 error message has been successfully sent. */
1699 addr->next = addr_failed;
1703 failure_log(addr, driver_name ? NULL : driver_kind, now);
1706 /* Ensure logging is turned on again in all cases */
1708 disable_logging = FALSE;
1714 /*************************************************
1715 * Address-independent error *
1716 *************************************************/
1718 /* This function is called when there's an error that is not dependent on a
1719 particular address, such as an expansion string failure. It puts the error into
1720 all the addresses in a batch, logs the incident on the main and panic logs, and
1721 clears the expansions. It is mostly called from local_deliver(), but can be
1722 called for a remote delivery via findugid().
1725 logit TRUE if (MAIN+PANIC) logging required
1726 addr the first of the chain of addresses
1728 format format string for error message, or NULL if already set in addr
1729 ... arguments for the format
1735 common_error(BOOL logit, address_item *addr, int code, uschar *format, ...)
1737 address_item *addr2;
1738 addr->basic_errno = code;
1744 va_start(ap, format);
1745 if (!string_vformat(buffer, sizeof(buffer), CS format, ap))
1746 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1747 "common_error expansion was longer than " SIZE_T_FMT, sizeof(buffer));
1749 addr->message = string_copy(buffer);
1752 for (addr2 = addr->next; addr2; addr2 = addr2->next)
1754 addr2->basic_errno = code;
1755 addr2->message = addr->message;
1758 if (logit) log_write(0, LOG_MAIN|LOG_PANIC, "%s", addr->message);
1759 deliver_set_expansions(NULL);
1765 /*************************************************
1766 * Check a "never users" list *
1767 *************************************************/
1769 /* This function is called to check whether a uid is on one of the two "never
1773 uid the uid to be checked
1774 nusers the list to be scanned; the first item in the list is the count
1776 Returns: TRUE if the uid is on the list
1780 check_never_users(uid_t uid, uid_t *nusers)
1783 if (!nusers) return FALSE;
1784 for (i = 1; i <= (int)(nusers[0]); i++) if (nusers[i] == uid) return TRUE;
1790 /*************************************************
1791 * Find uid and gid for a transport *
1792 *************************************************/
1794 /* This function is called for both local and remote deliveries, to find the
1795 uid/gid under which to run the delivery. The values are taken preferentially
1796 from the transport (either explicit or deliver_as_creator), then from the
1797 address (i.e. the router), and if nothing is set, the exim uid/gid are used. If
1798 the resulting uid is on the "never_users" or the "fixed_never_users" list, a
1799 panic error is logged, and the function fails (which normally leads to delivery
1803 addr the address (possibly a chain)
1805 uidp pointer to uid field
1806 gidp pointer to gid field
1807 igfp pointer to the use_initgroups field
1809 Returns: FALSE if failed - error has been set in address(es)
1813 findugid(address_item *addr, transport_instance *tp, uid_t *uidp, gid_t *gidp,
1817 BOOL gid_set = FALSE;
1819 /* Default initgroups flag comes from the transport */
1821 *igfp = tp->initgroups;
1823 /* First see if there's a gid on the transport, either fixed or expandable.
1824 The expanding function always logs failure itself. */
1831 else if (tp->expand_gid)
1833 if (!route_find_expanded_group(tp->expand_gid, tp->name, US"transport", gidp,
1836 common_error(FALSE, addr, ERRNO_GIDFAIL, NULL);
1842 /* If the transport did not set a group, see if the router did. */
1844 if (!gid_set && testflag(addr, af_gid_set))
1850 /* Pick up a uid from the transport if one is set. */
1852 if (tp->uid_set) *uidp = tp->uid;
1854 /* Otherwise, try for an expandable uid field. If it ends up as a numeric id,
1855 it does not provide a passwd value from which a gid can be taken. */
1857 else if (tp->expand_uid)
1860 if (!route_find_expanded_user(tp->expand_uid, tp->name, US"transport", &pw,
1861 uidp, &(addr->message)))
1863 common_error(FALSE, addr, ERRNO_UIDFAIL, NULL);
1873 /* If the transport doesn't set the uid, test the deliver_as_creator flag. */
1875 else if (tp->deliver_as_creator)
1877 *uidp = originator_uid;
1880 *gidp = originator_gid;
1885 /* Otherwise see if the address specifies the uid and if so, take it and its
1888 else if (testflag(addr, af_uid_set))
1891 *igfp = testflag(addr, af_initgroups);
1894 /* Nothing has specified the uid - default to the Exim user, and group if the
1907 /* If no gid is set, it is a disaster. We default to the Exim gid only if
1908 defaulting to the Exim uid. In other words, if the configuration has specified
1909 a uid, it must also provide a gid. */
1913 common_error(TRUE, addr, ERRNO_GIDFAIL, US"User set without group for "
1914 "%s transport", tp->name);
1918 /* Check that the uid is not on the lists of banned uids that may not be used
1919 for delivery processes. */
1921 nuname = check_never_users(*uidp, never_users)
1923 : check_never_users(*uidp, fixed_never_users)
1924 ? US"fixed_never_users"
1928 common_error(TRUE, addr, ERRNO_UIDFAIL, US"User %ld set for %s transport "
1929 "is on the %s list", (long int)(*uidp), tp->name, nuname);
1941 /*************************************************
1942 * Check the size of a message for a transport *
1943 *************************************************/
1945 /* Checks that the message isn't too big for the selected transport.
1946 This is called only when it is known that the limit is set.
1950 addr the (first) address being delivered
1953 DEFER expansion failed or did not yield an integer
1954 FAIL message too big
1958 check_message_size(transport_instance *tp, address_item *addr)
1963 deliver_set_expansions(addr);
1964 size_limit = expand_string_integer(tp->message_size_limit, TRUE);
1965 deliver_set_expansions(NULL);
1967 if (expand_string_message)
1970 addr->message = size_limit == -1
1971 ? string_sprintf("failed to expand message_size_limit "
1972 "in %s transport: %s", tp->name, expand_string_message)
1973 : string_sprintf("invalid message_size_limit "
1974 "in %s transport: %s", tp->name, expand_string_message);
1976 else if (size_limit > 0 && message_size > size_limit)
1980 string_sprintf("message is too big (transport limit = %d)",
1989 /*************************************************
1990 * Transport-time check for a previous delivery *
1991 *************************************************/
1993 /* Check that this base address hasn't previously been delivered to its routed
1994 transport. If it has been delivered, mark it done. The check is necessary at
1995 delivery time in order to handle homonymic addresses correctly in cases where
1996 the pattern of redirection changes between delivery attempts (so the unique
1997 fields change). Non-homonymic previous delivery is detected earlier, at routing
1998 time (which saves unnecessary routing).
2001 addr the address item
2002 testing TRUE if testing wanted only, without side effects
2004 Returns: TRUE if previously delivered by the transport
2008 previously_transported(address_item *addr, BOOL testing)
2010 (void)string_format(big_buffer, big_buffer_size, "%s/%s",
2011 addr->unique + (testflag(addr, af_homonym)? 3:0), addr->transport->name);
2013 if (tree_search(tree_nonrecipients, big_buffer) != 0)
2015 DEBUG(D_deliver|D_route|D_transport)
2016 debug_printf("%s was previously delivered (%s transport): discarded\n",
2017 addr->address, addr->transport->name);
2018 if (!testing) child_done(addr, tod_stamp(tod_log));
2027 /******************************************************
2028 * Check for a given header in a header string *
2029 ******************************************************/
2031 /* This function is used when generating quota warnings. The configuration may
2032 specify any header lines it likes in quota_warn_message. If certain of them are
2033 missing, defaults are inserted, so we need to be able to test for the presence
2037 hdr the required header name
2038 hstring the header string
2040 Returns: TRUE the header is in the string
2041 FALSE the header is not in the string
2045 contains_header(uschar *hdr, uschar *hstring)
2047 int len = Ustrlen(hdr);
2048 uschar *p = hstring;
2051 if (strncmpic(p, hdr, len) == 0)
2054 while (*p == ' ' || *p == '\t') p++;
2055 if (*p == ':') return TRUE;
2057 while (*p != 0 && *p != '\n') p++;
2058 if (*p == '\n') p++;
2066 /*************************************************
2067 * Perform a local delivery *
2068 *************************************************/
2070 /* Each local delivery is performed in a separate process which sets its
2071 uid and gid as specified. This is a safer way than simply changing and
2072 restoring using seteuid(); there is a body of opinion that seteuid() cannot be
2073 used safely. From release 4, Exim no longer makes any use of it. Besides, not
2074 all systems have seteuid().
2076 If the uid/gid are specified in the transport_instance, they are used; the
2077 transport initialization must ensure that either both or neither are set.
2078 Otherwise, the values associated with the address are used. If neither are set,
2079 it is a configuration error.
2081 The transport or the address may specify a home directory (transport over-
2082 rides), and if they do, this is set as $home. If neither have set a working
2083 directory, this value is used for that as well. Otherwise $home is left unset
2084 and the cwd is set to "/" - a directory that should be accessible to all users.
2086 Using a separate process makes it more complicated to get error information
2087 back. We use a pipe to pass the return code and also an error code and error
2088 text string back to the parent process.
2091 addr points to an address block for this delivery; for "normal" local
2092 deliveries this is the only address to be delivered, but for
2093 pseudo-remote deliveries (e.g. by batch SMTP to a file or pipe)
2094 a number of addresses can be handled simultaneously, and in this
2095 case addr will point to a chain of addresses with the same
2098 shadowing TRUE if running a shadow transport; this causes output from pipes
2105 deliver_local(address_item *addr, BOOL shadowing)
2107 BOOL use_initgroups;
2110 int status, len, rc;
2113 uschar *working_directory;
2114 address_item *addr2;
2115 transport_instance *tp = addr->transport;
2117 /* Set up the return path from the errors or sender address. If the transport
2118 has its own return path setting, expand it and replace the existing value. */
2120 if(addr->prop.errors_address)
2121 return_path = addr->prop.errors_address;
2122 #ifdef EXPERIMENTAL_SRS
2123 else if (addr->prop.srs_sender)
2124 return_path = addr->prop.srs_sender;
2127 return_path = sender_address;
2129 if (tp->return_path)
2131 uschar *new_return_path = expand_string(tp->return_path);
2132 if (!new_return_path)
2134 if (!expand_string_forcedfail)
2136 common_error(TRUE, addr, ERRNO_EXPANDFAIL,
2137 US"Failed to expand return path \"%s\" in %s transport: %s",
2138 tp->return_path, tp->name, expand_string_message);
2142 else return_path = new_return_path;
2145 /* For local deliveries, one at a time, the value used for logging can just be
2146 set directly, once and for all. */
2148 used_return_path = return_path;
2150 /* Sort out the uid, gid, and initgroups flag. If an error occurs, the message
2151 gets put into the address(es), and the expansions are unset, so we can just
2154 if (!findugid(addr, tp, &uid, &gid, &use_initgroups)) return;
2156 /* See if either the transport or the address specifies a home directory. A
2157 home directory set in the address may already be expanded; a flag is set to
2158 indicate that. In other cases we must expand it. */
2160 if ( (deliver_home = tp->home_dir) /* Set in transport, or */
2161 || ( (deliver_home = addr->home_dir) /* Set in address and */
2162 && !testflag(addr, af_home_expanded) /* not expanded */
2165 uschar *rawhome = deliver_home;
2166 deliver_home = NULL; /* in case it contains $home */
2167 if (!(deliver_home = expand_string(rawhome)))
2169 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"home directory \"%s\" failed "
2170 "to expand for %s transport: %s", rawhome, tp->name,
2171 expand_string_message);
2174 if (*deliver_home != '/')
2176 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"home directory path \"%s\" "
2177 "is not absolute for %s transport", deliver_home, tp->name);
2182 /* See if either the transport or the address specifies a current directory,
2183 and if so, expand it. If nothing is set, use the home directory, unless it is
2184 also unset in which case use "/", which is assumed to be a directory to which
2185 all users have access. It is necessary to be in a visible directory for some
2186 operating systems when running pipes, as some commands (e.g. "rm" under Solaris
2187 2.5) require this. */
2189 working_directory = tp->current_dir ? tp->current_dir : addr->current_dir;
2190 if (working_directory)
2192 uschar *raw = working_directory;
2193 if (!(working_directory = expand_string(raw)))
2195 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"current directory \"%s\" "
2196 "failed to expand for %s transport: %s", raw, tp->name,
2197 expand_string_message);
2200 if (*working_directory != '/')
2202 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"current directory path "
2203 "\"%s\" is not absolute for %s transport", working_directory, tp->name);
2207 else working_directory = deliver_home ? deliver_home : US"/";
2209 /* If one of the return_output flags is set on the transport, create and open a
2210 file in the message log directory for the transport to write its output onto.
2211 This is mainly used by pipe transports. The file needs to be unique to the
2212 address. This feature is not available for shadow transports. */
2215 && ( tp->return_output || tp->return_fail_output
2216 || tp->log_output || tp->log_fail_output || tp->log_defer_output
2221 addr->return_filename =
2222 spool_fname(US"msglog", message_subdir, message_id,
2223 string_sprintf("-%d-%d", getpid(), return_count++));
2225 if ((addr->return_file = open_msglog_file(addr->return_filename, 0400, &error)) < 0)
2227 common_error(TRUE, addr, errno, US"Unable to %s file for %s transport "
2228 "to return message: %s", error, tp->name, strerror(errno));
2233 /* Create the pipe for inter-process communication. */
2237 common_error(TRUE, addr, ERRNO_PIPEFAIL, US"Creation of pipe failed: %s",
2242 /* Now fork the process to do the real work in the subprocess, but first
2243 ensure that all cached resources are freed so that the subprocess starts with
2244 a clean slate and doesn't interfere with the parent process. */
2248 if ((pid = fork()) == 0)
2250 BOOL replicate = TRUE;
2252 /* Prevent core dumps, as we don't want them in users' home directories.
2253 HP-UX doesn't have RLIMIT_CORE; I don't know how to do this in that
2254 system. Some experimental/developing systems (e.g. GNU/Hurd) may define
2255 RLIMIT_CORE but not support it in setrlimit(). For such systems, do not
2256 complain if the error is "not supported".
2258 There are two scenarios where changing the max limit has an effect. In one,
2259 the user is using a .forward and invoking a command of their choice via pipe;
2260 for these, we do need the max limit to be 0 unless the admin chooses to
2261 permit an increased limit. In the other, the command is invoked directly by
2262 the transport and is under administrator control, thus being able to raise
2263 the limit aids in debugging. So there's no general always-right answer.
2265 Thus we inhibit core-dumps completely but let individual transports, while
2266 still root, re-raise the limits back up to aid debugging. We make the
2267 default be no core-dumps -- few enough people can use core dumps in
2268 diagnosis that it's reasonable to make them something that has to be explicitly requested.
2275 if (setrlimit(RLIMIT_CORE, &rl) < 0)
2277 # ifdef SETRLIMIT_NOT_SUPPORTED
2278 if (errno != ENOSYS && errno != ENOTSUP)
2280 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_CORE) failed: %s",
2285 /* Reset the random number generator, so different processes don't all
2286 have the same sequence. */
2290 /* If the transport has a setup entry, call this first, while still
2291 privileged. (Appendfile uses this to expand quota, for example, while
2292 able to read private files.) */
2294 if (addr->transport->setup)
2295 switch((addr->transport->setup)(addr->transport, addr, NULL, uid, gid,
2299 addr->transport_return = DEFER;
2303 addr->transport_return = PANIC;
2307 /* Ignore SIGINT and SIGTERM during delivery. Also ignore SIGUSR1, as
2308 when the process becomes unprivileged, it won't be able to write to the
2309 process log. SIGHUP is ignored throughout exim, except when it is being
2312 signal(SIGINT, SIG_IGN);
2313 signal(SIGTERM, SIG_IGN);
2314 signal(SIGUSR1, SIG_IGN);
2316 /* Close the unwanted half of the pipe, and set close-on-exec for the other
2317 half - for transports that exec things (e.g. pipe). Then set the required
2320 (void)close(pfd[pipe_read]);
2321 (void)fcntl(pfd[pipe_write], F_SETFD, fcntl(pfd[pipe_write], F_GETFD) |
2323 exim_setugid(uid, gid, use_initgroups,
2324 string_sprintf("local delivery to %s <%s> transport=%s", addr->local_part,
2325 addr->address, addr->transport->name));
2329 address_item *batched;
2330 debug_printf(" home=%s current=%s\n", deliver_home, working_directory);
2331 for (batched = addr->next; batched; batched = batched->next)
2332 debug_printf("additional batched address: %s\n", batched->address);
2335 /* Set an appropriate working directory. */
2337 if (Uchdir(working_directory) < 0)
2339 addr->transport_return = DEFER;
2340 addr->basic_errno = errno;
2341 addr->message = string_sprintf("failed to chdir to %s", working_directory);
2344 /* If successful, call the transport */
2349 set_process_info("delivering %s to %s using %s", message_id,
2350 addr->local_part, addr->transport->name);
2352 /* Setting this global in the subprocess means we need never clear it */
2353 transport_name = addr->transport->name;
2355 /* If a transport filter has been specified, set up its argument list.
2356 Any errors will get put into the address, and FALSE yielded. */
2358 if (addr->transport->filter_command)
2360 ok = transport_set_up_command(&transport_filter_argv,
2361 addr->transport->filter_command,
2362 TRUE, PANIC, addr, US"transport filter", NULL);
2363 transport_filter_timeout = addr->transport->filter_timeout;
2365 else transport_filter_argv = NULL;
2369 debug_print_string(addr->transport->debug_string);
2370 replicate = !(addr->transport->info->code)(addr->transport, addr);
2374 /* Pass the results back down the pipe. If necessary, first replicate the
2375 status in the top address to the others in the batch. The label is the
2376 subject of a goto when a call to the transport's setup function fails. We
2377 pass the pointer to the transport back in case it got changed as a result of
2378 file_format in appendfile. */
2382 if (replicate) replicate_status(addr);
2383 for (addr2 = addr; addr2; addr2 = addr2->next)
2386 int local_part_length = Ustrlen(addr2->local_part);
2390 if( (ret = write(pfd[pipe_write], &addr2->transport_return, sizeof(int))) != sizeof(int)
2391 || (ret = write(pfd[pipe_write], &transport_count, sizeof(transport_count))) != sizeof(transport_count)
2392 || (ret = write(pfd[pipe_write], &addr2->flags, sizeof(addr2->flags))) != sizeof(addr2->flags)
2393 || (ret = write(pfd[pipe_write], &addr2->basic_errno, sizeof(int))) != sizeof(int)
2394 || (ret = write(pfd[pipe_write], &addr2->more_errno, sizeof(int))) != sizeof(int)
2395 || (ret = write(pfd[pipe_write], &addr2->delivery_usec, sizeof(int))) != sizeof(int)
2396 || (ret = write(pfd[pipe_write], &addr2->special_action, sizeof(int))) != sizeof(int)
2397 || (ret = write(pfd[pipe_write], &addr2->transport,
2398 sizeof(transport_instance *))) != sizeof(transport_instance *)
2400 /* For a file delivery, pass back the local part, in case the original
2401 was only part of the final delivery path. This gives more complete
2404 || (testflag(addr2, af_file)
2405 && ( (ret = write(pfd[pipe_write], &local_part_length, sizeof(int))) != sizeof(int)
2406 || (ret = write(pfd[pipe_write], addr2->local_part, local_part_length)) != local_part_length
2410 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s",
2411 ret == -1 ? strerror(errno) : "short write");
2413 /* Now any messages */
2415 for (i = 0, s = addr2->message; i < 2; i++, s = addr2->user_message)
2417 int message_length = s ? Ustrlen(s) + 1 : 0;
2418 if( (ret = write(pfd[pipe_write], &message_length, sizeof(int))) != sizeof(int)
2419 || message_length > 0 && (ret = write(pfd[pipe_write], s, message_length)) != message_length
2421 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s",
2422 ret == -1 ? strerror(errno) : "short write");
2426 /* OK, this process is now done. Free any cached resources that it opened,
2427 and close the pipe we were writing down before exiting. */
2429 (void)close(pfd[pipe_write]);
2434 /* Back in the main process: panic if the fork did not succeed. This seems
2435 better than returning an error - if forking is failing it is probably best
2436 not to try other deliveries for this message. */
2439 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Fork failed for local delivery to %s",
2442 /* Read the pipe to get the delivery status codes and error messages. Our copy
2443 of the writing end must be closed first, as otherwise read() won't return zero
2444 on an empty pipe. We check that a status exists for each address before
2445 overwriting the address structure. If data is missing, the default DEFER status
2446 will remain. Afterwards, close the reading end. */
2448 (void)close(pfd[pipe_write]);
2450 for (addr2 = addr; addr2; addr2 = addr2->next)
2452 if ((len = read(pfd[pipe_read], &status, sizeof(int))) > 0)
2457 addr2->transport_return = status;
2458 len = read(pfd[pipe_read], &transport_count,
2459 sizeof(transport_count));
2460 len = read(pfd[pipe_read], &addr2->flags, sizeof(addr2->flags));
2461 len = read(pfd[pipe_read], &addr2->basic_errno, sizeof(int));
2462 len = read(pfd[pipe_read], &addr2->more_errno, sizeof(int));
2463 len = read(pfd[pipe_read], &addr2->delivery_usec, sizeof(int));
2464 len = read(pfd[pipe_read], &addr2->special_action, sizeof(int));
2465 len = read(pfd[pipe_read], &addr2->transport,
2466 sizeof(transport_instance *));
2468 if (testflag(addr2, af_file))
2471 if ( read(pfd[pipe_read], &llen, sizeof(int)) != sizeof(int)
2472 || llen > 64*4 /* limit from rfc 5821, times I18N factor */
2475 log_write(0, LOG_MAIN|LOG_PANIC, "bad local_part length read"
2476 " from delivery subprocess");
2479 /* sanity-checked llen so disable the Coverity error */
2480 /* coverity[tainted_data] */
2481 if (read(pfd[pipe_read], big_buffer, llen) != llen)
2483 log_write(0, LOG_MAIN|LOG_PANIC, "bad local_part read"
2484 " from delivery subprocess");
2487 big_buffer[llen] = 0;
2488 addr2->local_part = string_copy(big_buffer);
2491 for (i = 0, sptr = &addr2->message; i < 2; i++, sptr = &addr2->user_message)
2494 len = read(pfd[pipe_read], &message_length, sizeof(int));
2495 if (message_length > 0)
2497 len = read(pfd[pipe_read], big_buffer, message_length);
2498 big_buffer[big_buffer_size-1] = '\0'; /* guard byte */
2499 if (len > 0) *sptr = string_copy(big_buffer);
2506 log_write(0, LOG_MAIN|LOG_PANIC, "failed to read delivery status for %s "
2507 "from delivery subprocess", addr2->unique);
2512 (void)close(pfd[pipe_read]);
2514 /* Unless shadowing, write all successful addresses immediately to the journal
2515 file, to ensure they are recorded asap. For homonymic addresses, use the base
2516 address plus the transport name. Failure to write the journal is panic-worthy,
2517 but don't stop, as it may prove possible subsequently to update the spool file
2518 in order to record the delivery. */
2522 for (addr2 = addr; addr2; addr2 = addr2->next)
2523 if (addr2->transport_return == OK)
2525 if (testflag(addr2, af_homonym))
2526 sprintf(CS big_buffer, "%.500s/%s\n", addr2->unique + 3, tp->name);
2528 sprintf(CS big_buffer, "%.500s\n", addr2->unique);
2530 /* In the test harness, wait just a bit to let the subprocess finish off
2531 any debug output etc first. */
2533 if (running_in_test_harness) millisleep(300);
2535 DEBUG(D_deliver) debug_printf("journalling %s", big_buffer);
2536 len = Ustrlen(big_buffer);
2537 if (write(journal_fd, big_buffer, len) != len)
2538 log_write(0, LOG_MAIN|LOG_PANIC, "failed to update journal for %s: %s",
2539 big_buffer, strerror(errno));
2542 /* Ensure the journal file is pushed out to disk. */
2544 if (EXIMfsync(journal_fd) < 0)
2545 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s",
2549 /* Wait for the process to finish. If it terminates with a non-zero code,
2550 freeze the message (except for SIGTERM, SIGKILL and SIGQUIT), but leave the
2551 status values of all the addresses as they are. Take care to handle the case
2552 when the subprocess doesn't seem to exist. This has been seen on one system
2553 when Exim was called from an MUA that set SIGCHLD to SIG_IGN. When that
2554 happens, wait() doesn't recognize the termination of child processes. Exim now
2555 resets SIGCHLD to SIG_DFL, but this code should still be robust. */
2557 while ((rc = wait(&status)) != pid)
2558 if (rc < 0 && errno == ECHILD) /* Process has vanished */
2560 log_write(0, LOG_MAIN, "%s transport process vanished unexpectedly",
2561 addr->transport->driver_name);
2566 if ((status & 0xffff) != 0)
2568 int msb = (status >> 8) & 255;
2569 int lsb = status & 255;
2570 int code = (msb == 0)? (lsb & 0x7f) : msb;
2571 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
2572 addr->special_action = SPECIAL_FREEZE;
2573 log_write(0, LOG_MAIN|LOG_PANIC, "%s transport process returned non-zero "
2574 "status 0x%04x: %s %d",
2575 addr->transport->driver_name,
2577 msb == 0 ? "terminated by signal" : "exit code",
2581 /* If SPECIAL_WARN is set in the top address, send a warning message. */
2583 if (addr->special_action == SPECIAL_WARN && addr->transport->warn_message)
2586 uschar *warn_message;
2589 DEBUG(D_deliver) debug_printf("Warning message requested by transport\n");
2591 if (!(warn_message = expand_string(addr->transport->warn_message)))
2592 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand \"%s\" (warning "
2593 "message for %s transport): %s", addr->transport->warn_message,
2594 addr->transport->name, expand_string_message);
2596 else if ((pid = child_open_exim(&fd)) > 0)
2598 FILE *f = fdopen(fd, "wb");
2599 if (errors_reply_to && !contains_header(US"Reply-To", warn_message))
2600 fprintf(f, "Reply-To: %s\n", errors_reply_to);
2601 fprintf(f, "Auto-Submitted: auto-replied\n");
2602 if (!contains_header(US"From", warn_message))
2604 fprintf(f, "%s", CS warn_message);
2606 /* Close and wait for child process to complete, without a timeout. */
2609 (void)child_close(pid, 0);
2612 addr->special_action = SPECIAL_NONE;
2619 /* Check transport for the given concurrency limit. Return TRUE if over
2620 the limit (or an expansion failure), else FALSE and if there was a limit,
2621 the key for the hints database used for the concurrency count. */
2624 tpt_parallel_check(transport_instance * tp, address_item * addr, uschar ** key)
2626 unsigned max_parallel;
2628 if (!tp->max_parallel) return FALSE;
2630 max_parallel = (unsigned) expand_string_integer(tp->max_parallel, TRUE);
2631 if (expand_string_message)
2633 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand max_parallel option "
2634 "in %s transport (%s): %s", tp->name, addr->address,
2635 expand_string_message);
2639 if (max_parallel > 0)
2641 uschar * serialize_key = string_sprintf("tpt-serialize-%s", tp->name);
2642 if (!enq_start(serialize_key, max_parallel))
2644 address_item * next;
2646 debug_printf("skipping tpt %s because concurrency limit %u reached\n",
2647 tp->name, max_parallel);
2651 addr->message = US"concurrency limit reached for transport";
2652 addr->basic_errno = ERRNO_TRETRY;
2653 post_process_one(addr, DEFER, LOG_MAIN, DTYPE_TRANSPORT, 0);
2654 } while ((addr = next));
2657 *key = serialize_key;
2664 /*************************************************
2665 * Do local deliveries *
2666 *************************************************/
2668 /* This function processes the list of addresses in addr_local. True local
2669 deliveries are always done one address at a time. However, local deliveries can
2670 be batched up in some cases. Typically this is when writing batched SMTP output
2671 files for use by some external transport mechanism, or when running local
2672 deliveries over LMTP.
2679 do_local_deliveries(void)
2682 open_db *dbm_file = NULL;
2683 time_t now = time(NULL);
2685 /* Loop until we have exhausted the supply of local deliveries */
2689 struct timeval delivery_start;
2690 struct timeval deliver_time;
2691 address_item *addr2, *addr3, *nextaddr;
2692 int logflags = LOG_MAIN;
2693 int logchar = dont_deliver? '*' : '=';
2694 transport_instance *tp;
2695 uschar * serialize_key = NULL;
2697 /* Pick the first undelivered address off the chain */
2699 address_item *addr = addr_local;
2700 addr_local = addr->next;
2703 DEBUG(D_deliver|D_transport)
2704 debug_printf("--------> %s <--------\n", addr->address);
2706 /* An internal disaster if there is no transport. Should not occur! */
2708 if (!(tp = addr->transport))
2710 logflags |= LOG_PANIC;
2711 disable_logging = FALSE; /* Jic */
2712 addr->message = addr->router
2713 ? string_sprintf("No transport set by %s router", addr->router->name)
2714 : string_sprintf("No transport set by system filter");
2715 post_process_one(addr, DEFER, logflags, DTYPE_TRANSPORT, 0);
2719 /* Check that this base address hasn't previously been delivered to this
2720 transport. The check is necessary at this point to handle homonymic addresses
2721 correctly in cases where the pattern of redirection changes between delivery
2722 attempts. Non-homonymic previous delivery is detected earlier, at routing
2725 if (previously_transported(addr, FALSE)) continue;
2727 /* There are weird cases where logging is disabled */
2729 disable_logging = tp->disable_logging;
2731 /* Check for batched addresses and possible amalgamation. Skip all the work
2732 if either batch_max <= 1 or there aren't any other addresses for local
2735 if (tp->batch_max > 1 && addr_local)
2737 int batch_count = 1;
2738 BOOL uses_dom = readconf_depends((driver_instance *)tp, US"domain");
2739 BOOL uses_lp = ( testflag(addr, af_pfr)
2740 && (testflag(addr, af_file) || addr->local_part[0] == '|')
2742 || readconf_depends((driver_instance *)tp, US"local_part");
2743 uschar *batch_id = NULL;
2744 address_item **anchor = &addr_local;
2745 address_item *last = addr;
2748 /* Expand the batch_id string for comparison with other addresses.
2749 Expansion failure suppresses batching. */
2753 deliver_set_expansions(addr);
2754 batch_id = expand_string(tp->batch_id);
2755 deliver_set_expansions(NULL);
2758 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2759 "in %s transport (%s): %s", tp->name, addr->address,
2760 expand_string_message);
2761 batch_count = tp->batch_max;
2765 /* Until we reach the batch_max limit, pick off addresses which have the
2766 same characteristics. These are:
2769 not previously delivered (see comment about 50 lines above)
2770 same local part if the transport's configuration contains $local_part
2771 or if this is a file or pipe delivery from a redirection
2772 same domain if the transport's configuration contains $domain
2774 same additional headers
2775 same headers to be removed
2776 same uid/gid for running the transport
2777 same first host if a host list is set
2780 while ((next = *anchor) && batch_count < tp->batch_max)
2783 tp == next->transport
2784 && !previously_transported(next, TRUE)
2785 && testflag(addr, af_pfr) == testflag(next, af_pfr)
2786 && testflag(addr, af_file) == testflag(next, af_file)
2787 && (!uses_lp || Ustrcmp(next->local_part, addr->local_part) == 0)
2788 && (!uses_dom || Ustrcmp(next->domain, addr->domain) == 0)
2789 && same_strings(next->prop.errors_address, addr->prop.errors_address)
2790 && same_headers(next->prop.extra_headers, addr->prop.extra_headers)
2791 && same_strings(next->prop.remove_headers, addr->prop.remove_headers)
2792 && same_ugid(tp, addr, next)
2793 && ( !addr->host_list && !next->host_list
2796 && Ustrcmp(addr->host_list->name, next->host_list->name) == 0
2799 /* If the transport has a batch_id setting, batch_id will be non-NULL
2800 from the expansion outside the loop. Expand for this address and compare.
2801 Expansion failure makes this address ineligible for batching. */
2806 address_item *save_nextnext = next->next;
2807 next->next = NULL; /* Expansion for a single address */
2808 deliver_set_expansions(next);
2809 next->next = save_nextnext;
2810 bid = expand_string(tp->batch_id);
2811 deliver_set_expansions(NULL);
2814 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2815 "in %s transport (%s): %s", tp->name, next->address,
2816 expand_string_message);
2819 else ok = (Ustrcmp(batch_id, bid) == 0);
2822 /* Take address into batch if OK. */
2826 *anchor = next->next; /* Include the address */
2832 else anchor = &next->next; /* Skip the address */
2836 /* We now have one or more addresses that can be delivered in a batch. Check
2837 whether the transport is prepared to accept a message of this size. If not,
2838 fail them all forthwith. If the expansion fails, or does not yield an
2839 integer, defer delivery. */
2841 if (tp->message_size_limit)
2843 int rc = check_message_size(tp, addr);
2846 replicate_status(addr);
2850 post_process_one(addr, rc, logflags, DTYPE_TRANSPORT, 0);
2853 continue; /* With next batch of addresses */
2857 /* If we are not running the queue, or if forcing, all deliveries will be
2858 attempted. Otherwise, we must respect the retry times for each address. Even
2859 when not doing this, we need to set up the retry key string, and determine
2860 whether a retry record exists, because after a successful delivery, a delete
2861 retry item must be set up. Keep the retry database open only for the duration
2862 of these checks, rather than for all local deliveries, because some local
2863 deliveries (e.g. to pipes) can take a substantial time. */
2865 if (!(dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE)))
2867 DEBUG(D_deliver|D_retry|D_hints_lookup)
2868 debug_printf("no retry data available\n");
2875 BOOL ok = TRUE; /* to deliver this address */
2878 /* Set up the retry key to include the domain or not, and change its
2879 leading character from "R" to "T". Must make a copy before doing this,
2880 because the old key may be pointed to from a "delete" retry item after
2883 retry_key = string_copy(
2884 tp->retry_use_local_part ? addr2->address_retry_key :
2885 addr2->domain_retry_key);
2888 /* Inspect the retry data. If there is no hints file, delivery happens. */
2892 dbdata_retry *retry_record = dbfn_read(dbm_file, retry_key);
2894 /* If there is no retry record, delivery happens. If there is,
2895 remember it exists so it can be deleted after a successful delivery. */
2899 setflag(addr2, af_lt_retry_exists);
2901 /* A retry record exists for this address. If queue running and not
2902 forcing, inspect its contents. If the record is too old, or if its
2903 retry time has come, or if it has passed its cutoff time, delivery
2908 debug_printf("retry record exists: age=%s ",
2909 readconf_printtime(now - retry_record->time_stamp));
2910 debug_printf("(max %s)\n", readconf_printtime(retry_data_expire));
2911 debug_printf(" time to retry = %s expired = %d\n",
2912 readconf_printtime(retry_record->next_try - now),
2913 retry_record->expired);
2916 if (queue_running && !deliver_force)
2918 ok = (now - retry_record->time_stamp > retry_data_expire)
2919 || (now >= retry_record->next_try)
2920 || retry_record->expired;
2922 /* If we haven't reached the retry time, there is one more check
2923 to do, which is for the ultimate address timeout. */
2926 ok = retry_ultimate_address_timeout(retry_key, addr2->domain,
2930 else DEBUG(D_retry) debug_printf("no retry record exists\n");
2933 /* This address is to be delivered. Leave it on the chain. */
2938 addr2 = addr2->next;
2941 /* This address is to be deferred. Take it out of the chain, and
2942 post-process it as complete. Must take it out of the chain first,
2943 because post processing puts it on another chain. */
2947 address_item *this = addr2;
2948 this->message = US"Retry time not yet reached";
2949 this->basic_errno = ERRNO_LRETRY;
2950 addr2 = addr3 ? (addr3->next = addr2->next)
2951 : (addr = addr2->next);
2952 post_process_one(this, DEFER, logflags, DTYPE_TRANSPORT, 0);
2956 if (dbm_file) dbfn_close(dbm_file);
2958 /* If there are no addresses left on the chain, they all deferred. Loop
2959 for the next set of addresses. */
2961 if (!addr) continue;
2963 /* If the transport is limited for parallellism, enforce that here.
2964 We use a hints DB entry, incremented here and decremented after
2965 the transport (and any shadow transport) completes. */
2967 if (tpt_parallel_check(tp, addr, &serialize_key))
2969 if (expand_string_message)
2971 logflags |= LOG_PANIC;
2975 post_process_one(addr, DEFER, logflags, DTYPE_TRANSPORT, 0);
2976 } while ((addr = addr2));
2978 continue; /* Loop for the next set of addresses. */
2982 /* So, finally, we do have some addresses that can be passed to the
2983 transport. Before doing so, set up variables that are relevant to a
2986 deliver_set_expansions(addr);
2988 gettimeofday(&delivery_start, NULL);
2989 deliver_local(addr, FALSE);
2990 timesince(&deliver_time, &delivery_start);
2992 /* If a shadow transport (which must perforce be another local transport), is
2993 defined, and its condition is met, we must pass the message to the shadow
2994 too, but only those addresses that succeeded. We do this by making a new
2995 chain of addresses - also to keep the original chain uncontaminated. We must
2996 use a chain rather than doing it one by one, because the shadow transport may
2999 NOTE: if the condition fails because of a lookup defer, there is nothing we
3003 && ( !tp->shadow_condition
3004 || expand_check_condition(tp->shadow_condition, tp->name, US"transport")
3007 transport_instance *stp;
3008 address_item *shadow_addr = NULL;
3009 address_item **last = &shadow_addr;
3011 for (stp = transports; stp; stp = stp->next)
3012 if (Ustrcmp(stp->name, tp->shadow) == 0) break;
3015 log_write(0, LOG_MAIN|LOG_PANIC, "shadow transport \"%s\" not found ",
3018 /* Pick off the addresses that have succeeded, and make clones. Put into
3019 the shadow_message field a pointer to the shadow_message field of the real
3022 else for (addr2 = addr; addr2; addr2 = addr2->next)
3023 if (addr2->transport_return == OK)
3025 addr3 = store_get(sizeof(address_item));
3028 addr3->shadow_message = US &addr2->shadow_message;
3029 addr3->transport = stp;
3030 addr3->transport_return = DEFER;
3031 addr3->return_filename = NULL;
3032 addr3->return_file = -1;
3034 last = &addr3->next;
3037 /* If we found any addresses to shadow, run the delivery, and stick any
3038 message back into the shadow_message field in the original. */
3042 int save_count = transport_count;
3044 DEBUG(D_deliver|D_transport)
3045 debug_printf(">>>>>>>>>>>>>>>> Shadow delivery >>>>>>>>>>>>>>>>\n");
3046 deliver_local(shadow_addr, TRUE);
3048 for(; shadow_addr; shadow_addr = shadow_addr->next)
3050 int sresult = shadow_addr->transport_return;
3051 *(uschar **)shadow_addr->shadow_message =
3053 ? string_sprintf(" ST=%s", stp->name)
3054 : string_sprintf(" ST=%s (%s%s%s)", stp->name,
3055 shadow_addr->basic_errno <= 0
3057 : US strerror(shadow_addr->basic_errno),
3058 shadow_addr->basic_errno <= 0 || !shadow_addr->message
3061 shadow_addr->message
3062 ? shadow_addr->message
3063 : shadow_addr->basic_errno <= 0
3067 DEBUG(D_deliver|D_transport)
3068 debug_printf("%s shadow transport returned %s for %s\n",
3070 sresult == OK ? "OK" :
3071 sresult == DEFER ? "DEFER" :
3072 sresult == FAIL ? "FAIL" :
3073 sresult == PANIC ? "PANIC" : "?",
3074 shadow_addr->address);
3077 DEBUG(D_deliver|D_transport)
3078 debug_printf(">>>>>>>>>>>>>>>> End shadow delivery >>>>>>>>>>>>>>>>\n");
3080 transport_count = save_count; /* Restore original transport count */
3084 /* Cancel the expansions that were set up for the delivery. */
3086 deliver_set_expansions(NULL);
3088 /* If the transport was parallelism-limited, decrement the hints DB record. */
3090 if (serialize_key) enq_end(serialize_key);
3092 /* Now we can process the results of the real transport. We must take each
3093 address off the chain first, because post_process_one() puts it on another
3096 for (addr2 = addr; addr2; addr2 = nextaddr)
3098 int result = addr2->transport_return;
3099 nextaddr = addr2->next;
3101 DEBUG(D_deliver|D_transport)
3102 debug_printf("%s transport returned %s for %s\n",
3104 result == OK ? "OK" :
3105 result == DEFER ? "DEFER" :
3106 result == FAIL ? "FAIL" :
3107 result == PANIC ? "PANIC" : "?",
3110 /* If there is a retry_record, or if delivery is deferred, build a retry
3111 item for setting a new retry time or deleting the old retry record from
3112 the database. These items are handled all together after all addresses
3113 have been handled (so the database is open just for a short time for
3116 if (result == DEFER || testflag(addr2, af_lt_retry_exists))
3118 int flags = result == DEFER ? 0 : rf_delete;
3119 uschar *retry_key = string_copy(tp->retry_use_local_part
3120 ? addr2->address_retry_key : addr2->domain_retry_key);
3122 retry_add_item(addr2, retry_key, flags);
3125 /* Done with this address */
3129 addr2->more_errno = deliver_time.tv_sec;
3130 addr2->delivery_usec = deliver_time.tv_usec;
3132 post_process_one(addr2, result, logflags, DTYPE_TRANSPORT, logchar);
3134 /* If a pipe delivery generated text to be sent back, the result may be
3135 changed to FAIL, and we must copy this for subsequent addresses in the
3138 if (addr2->transport_return != result)
3140 for (addr3 = nextaddr; addr3; addr3 = addr3->next)
3142 addr3->transport_return = addr2->transport_return;
3143 addr3->basic_errno = addr2->basic_errno;
3144 addr3->message = addr2->message;
3146 result = addr2->transport_return;
3149 /* Whether or not the result was changed to FAIL, we need to copy the
3150 return_file value from the first address into all the addresses of the
3151 batch, so they are all listed in the error message. */
3153 addr2->return_file = addr->return_file;
3155 /* Change log character for recording successful deliveries. */
3157 if (result == OK) logchar = '-';
3159 } /* Loop back for next batch of addresses */
3165 /*************************************************
3166 * Sort remote deliveries *
3167 *************************************************/
3169 /* This function is called if remote_sort_domains is set. It arranges that the
3170 chain of addresses for remote deliveries is ordered according to the strings
3171 specified. Try to make this shuffling reasonably efficient by handling
3172 sequences of addresses rather than just single ones.
3179 sort_remote_deliveries(void)
3182 address_item **aptr = &addr_remote;
3183 const uschar *listptr = remote_sort_domains;
3188 && (pattern = string_nextinlist(&listptr, &sep, patbuf, sizeof(patbuf)))
3191 address_item *moved = NULL;
3192 address_item **bptr = &moved;
3196 address_item **next;
3197 deliver_domain = (*aptr)->domain; /* set $domain */
3198 if (match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1,
3199 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK)
3201 aptr = &(*aptr)->next;
3205 next = &(*aptr)->next;
3207 && (deliver_domain = (*next)->domain, /* Set $domain */
3208 match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1,
3209 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL)) != OK
3211 next = &(*next)->next;
3213 /* If the batch of non-matchers is at the end, add on any that were
3214 extracted further up the chain, and end this iteration. Otherwise,
3215 extract them from the chain and hang on the moved chain. */
3227 aptr = &(*aptr)->next;
3230 /* If the loop ended because the final address matched, *aptr will
3231 be NULL. Add on to the end any extracted non-matching addresses. If
3232 *aptr is not NULL, the loop ended via "break" when *next is null, that
3233 is, there was a string of non-matching addresses at the end. In this
3234 case the extracted addresses have already been added on the end. */
3236 if (!*aptr) *aptr = moved;
3242 debug_printf("remote addresses after sorting:\n");
3243 for (addr = addr_remote; addr; addr = addr->next)
3244 debug_printf(" %s\n", addr->address);
3250 /*************************************************
3251 * Read from pipe for remote delivery subprocess *
3252 *************************************************/
3254 /* This function is called when the subprocess is complete, but can also be
3255 called before it is complete, in order to empty a pipe that is full (to prevent
3256 deadlock). It must therefore keep track of its progress in the parlist data
3259 We read the pipe to get the delivery status codes and a possible error message
3260 for each address, optionally preceded by unusability data for the hosts and
3261 also by optional retry data.
3263 Read in large chunks into the big buffer and then scan through, interpreting
3264 the data therein. In most cases, only a single read will be necessary. No
3265 individual item will ever be anywhere near 2500 bytes in length, so by ensuring
3266 that we read the next chunk when there is less than 2500 bytes left in the
3267 non-final chunk, we can assume each item is complete in the buffer before
3268 handling it. Each item is written using a single write(), which is atomic for
3269 small items (less than PIPE_BUF, which seems to be at least 512 in any Unix and
3270 often bigger) so even if we are reading while the subprocess is still going, we
3271 should never have only a partial item in the buffer.
3274 poffset the offset of the parlist item
3275 eop TRUE if the process has completed
3277 Returns: TRUE if the terminating 'Z' item has been read,
3278 or there has been a disaster (i.e. no more data needed);
3283 par_read_pipe(int poffset, BOOL eop)
3286 pardata *p = parlist + poffset;
3287 address_item *addrlist = p->addrlist;
3288 address_item *addr = p->addr;
3291 uschar *endptr = big_buffer;
3292 uschar *ptr = endptr;
3293 uschar *msg = p->msg;
3294 BOOL done = p->done;
3295 BOOL finished = FALSE;
3296 /* minimum size to read is header size including id, subid and length */
3297 int required = PIPE_HEADER_SIZE;
3299 /* Loop through all items, reading from the pipe when necessary. The pipe
3300 is set up to be non-blocking, but there are two different Unix mechanisms in
3301 use. Exim uses O_NONBLOCK if it is defined. This returns 0 for end of file,
3302 and EAGAIN for no more data. If O_NONBLOCK is not defined, Exim uses O_NDELAY,
3303 which returns 0 for both end of file and no more data. We distinguish the
3304 two cases by taking 0 as end of file only when we know the process has
3307 Each separate item is written to the pipe in a single write(), and as they are
3308 all short items, the writes will all be atomic and we should never find
3309 ourselves in the position of having read an incomplete item. "Short" in this
3310 case can mean up to about 1K in the case when there is a long error message
3311 associated with an address. */
3313 DEBUG(D_deliver) debug_printf("reading pipe for subprocess %d (%s)\n",
3314 (int)p->pid, eop? "ended" : "not ended");
3318 retry_item *r, **rp;
3319 int remaining = endptr - ptr;
3320 uschar header[PIPE_HEADER_SIZE + 1];
3324 /* Read (first time) or top up the chars in the buffer if necessary.
3325 There will be only one read if we get all the available data (i.e. don't
3326 fill the buffer completely). */
3328 if (remaining < required && !finished)
3331 int available = big_buffer_size - remaining;
3333 if (remaining > 0) memmove(big_buffer, ptr, remaining);
3336 endptr = big_buffer + remaining;
3337 len = read(fd, endptr, available);
3339 DEBUG(D_deliver) debug_printf("read() yielded %d\n", len);
3341 /* If the result is EAGAIN and the process is not complete, just
3342 stop reading any more and process what we have already. */
3346 if (!eop && errno == EAGAIN) len = 0; else
3348 msg = string_sprintf("failed to read pipe from transport process "
3349 "%d for transport %s: %s", pid, addr->transport->driver_name,
3355 /* If the length is zero (eof or no-more-data), just process what we
3356 already have. Note that if the process is still running and we have
3357 read all the data in the pipe (but less that "available") then we
3358 won't read any more, as "finished" will get set. */
3362 finished = len != available;
3365 /* If we are at the end of the available data, exit the loop. */
3366 if (ptr >= endptr) break;
3368 /* copy and read header */
3369 memcpy(header, ptr, PIPE_HEADER_SIZE);
3370 header[PIPE_HEADER_SIZE] = '\0';
3373 required = Ustrtol(header + 2, &endc, 10) + PIPE_HEADER_SIZE; /* header + data */
3376 msg = string_sprintf("failed to read pipe from transport process "
3377 "%d for transport %s: error reading size from header", pid, addr->transport->driver_name);
3383 debug_printf("header read id:%c,subid:%c,size:%s,required:%d,remaining:%d,finished:%d\n",
3384 id, subid, header+2, required, remaining, finished);
3386 /* is there room for the dataset we want to read ? */
3387 if (required > big_buffer_size - PIPE_HEADER_SIZE)
3389 msg = string_sprintf("failed to read pipe from transport process "
3390 "%d for transport %s: big_buffer too small! required size=%d buffer size=%d", pid, addr->transport->driver_name,
3391 required, big_buffer_size - PIPE_HEADER_SIZE);
3396 /* We wrote all datasets with atomic write() calls. Remaining < required only
3397 happens if big_buffer was too small to get all available data from pipe;
3398 finished has to be false as well. */
3400 if (remaining < required)
3404 msg = string_sprintf("failed to read pipe from transport process "
3405 "%d for transport %s: required size=%d > remaining size=%d and finished=true",
3406 pid, addr->transport->driver_name, required, remaining);
3411 /* Step past the header */
3412 ptr += PIPE_HEADER_SIZE;
3414 /* Handle each possible type of item, assuming the complete item is
3415 available in store. */
3419 /* Host items exist only if any hosts were marked unusable. Match
3420 up by checking the IP address. */
3423 for (h = addrlist->host_list; h; h = h->next)
3425 if (!h->address || Ustrcmp(h->address, ptr+2) != 0) continue;
3433 /* Retry items are sent in a preceding R item for each address. This is
3434 kept separate to keep each message short enough to guarantee it won't
3435 be split in the pipe. Hopefully, in the majority of cases, there won't in
3436 fact be any retry items at all.
3438 The complete set of retry items might include an item to delete a
3439 routing retry if there was a previous routing delay. However, routing
3440 retries are also used when a remote transport identifies an address error.
3441 In that case, there may also be an "add" item for the same key. Arrange
3442 that a "delete" item is dropped in favour of an "add" item. */
3445 if (!addr) goto ADDR_MISMATCH;
3447 DEBUG(D_deliver|D_retry)
3448 debug_printf("reading retry information for %s from subprocess\n",
3451 /* Cut out any "delete" items on the list. */
3453 for (rp = &addr->retries; (r = *rp); rp = &r->next)
3454 if (Ustrcmp(r->key, ptr+1) == 0) /* Found item with same key */
3456 if (!(r->flags & rf_delete)) break; /* It was not "delete" */
3457 *rp = r->next; /* Excise a delete item */
3458 DEBUG(D_deliver|D_retry)
3459 debug_printf(" existing delete item dropped\n");
3462 /* We want to add a delete item only if there is no non-delete item;
3463 however we still have to step ptr through the data. */
3465 if (!r || !(*ptr & rf_delete))
3467 r = store_get(sizeof(retry_item));
3468 r->next = addr->retries;
3471 r->key = string_copy(ptr);
3473 memcpy(&r->basic_errno, ptr, sizeof(r->basic_errno));
3474 ptr += sizeof(r->basic_errno);
3475 memcpy(&r->more_errno, ptr, sizeof(r->more_errno));
3476 ptr += sizeof(r->more_errno);
3477 r->message = *ptr ? string_copy(ptr) : NULL;
3478 DEBUG(D_deliver|D_retry) debug_printf(" added %s item\n",
3479 r->flags & rf_delete ? "delete" : "retry");
3484 DEBUG(D_deliver|D_retry)
3485 debug_printf(" delete item not added: non-delete item exists\n");
3488 ptr += sizeof(r->basic_errno) + sizeof(r->more_errno);
3494 /* Put the amount of data written into the parlist block */
3497 memcpy(&(p->transport_count), ptr, sizeof(transport_count));
3498 ptr += sizeof(transport_count);
3501 /* Address items are in the order of items on the address chain. We
3502 remember the current address value in case this function is called
3503 several times to empty the pipe in stages. Information about delivery
3504 over TLS is sent in a preceding X item for each address. We don't put
3505 it in with the other info, in order to keep each message short enough to
3506 guarantee it won't be split in the pipe. */
3510 if (!addr) goto ADDR_MISMATCH; /* Below, in 'A' handler */
3514 addr->cipher = NULL;
3515 addr->peerdn = NULL;
3518 addr->cipher = string_copy(ptr);
3521 addr->peerdn = string_copy(ptr);
3526 (void) tls_import_cert(ptr, &addr->peercert);
3528 addr->peercert = NULL;
3533 (void) tls_import_cert(ptr, &addr->ourcert);
3535 addr->ourcert = NULL;
3538 # ifndef DISABLE_OCSP
3540 addr->ocsp = *ptr ? *ptr - '0' : OCSP_NOT_REQ;
3546 #endif /*SUPPORT_TLS*/
3548 case 'C': /* client authenticator information */
3551 case '1': addr->authenticator = *ptr ? string_copy(ptr) : NULL; break;
3552 case '2': addr->auth_id = *ptr ? string_copy(ptr) : NULL; break;
3553 case '3': addr->auth_sndr = *ptr ? string_copy(ptr) : NULL; break;
3558 #ifndef DISABLE_PRDR
3560 setflag(addr, af_prdr_used);
3565 setflag(addr, af_chunking_used);
3569 setflag(addr, af_tcp_fastopen);
3573 if (!addr) goto ADDR_MISMATCH;
3574 memcpy(&(addr->dsn_aware), ptr, sizeof(addr->dsn_aware));
3575 ptr += sizeof(addr->dsn_aware);
3576 DEBUG(D_deliver) debug_printf("DSN read: addr->dsn_aware = %d\n", addr->dsn_aware);
3583 msg = string_sprintf("address count mismatch for data read from pipe "
3584 "for transport process %d for transport %s", pid,
3585 addrlist->transport->driver_name);
3592 #ifdef SUPPORT_SOCKS
3593 case '2': /* proxy information; must arrive before A0 and applies to that addr XXX oops*/
3594 proxy_session = TRUE; /*XXX should this be cleared somewhere? */
3599 proxy_local_address = string_copy(ptr);
3601 memcpy(&proxy_local_port, ptr, sizeof(proxy_local_port));
3602 ptr += sizeof(proxy_local_port);
3607 #ifdef EXPERIMENTAL_DSN_INFO
3608 case '1': /* must arrive before A0, and applies to that addr */
3609 /* Two strings: smtp_greeting and helo_response */
3610 addr->smtp_greeting = string_copy(ptr);
3612 addr->helo_response = string_copy(ptr);
3618 DEBUG(D_deliver) debug_printf("A0 %s tret %d\n", addr->address, *ptr);
3619 addr->transport_return = *ptr++;
3620 addr->special_action = *ptr++;
3621 memcpy(&addr->basic_errno, ptr, sizeof(addr->basic_errno));
3622 ptr += sizeof(addr->basic_errno);
3623 memcpy(&addr->more_errno, ptr, sizeof(addr->more_errno));
3624 ptr += sizeof(addr->more_errno);
3625 memcpy(&addr->delivery_usec, ptr, sizeof(addr->delivery_usec));
3626 ptr += sizeof(addr->delivery_usec);
3627 memcpy(&addr->flags, ptr, sizeof(addr->flags));
3628 ptr += sizeof(addr->flags);
3629 addr->message = *ptr ? string_copy(ptr) : NULL;
3631 addr->user_message = *ptr ? string_copy(ptr) : NULL;
3634 /* Always two strings for host information, followed by the port number and DNSSEC mark */
3638 h = store_get(sizeof(host_item));
3639 h->name = string_copy(ptr);
3641 h->address = string_copy(ptr);
3643 memcpy(&h->port, ptr, sizeof(h->port));
3644 ptr += sizeof(h->port);
3645 h->dnssec = *ptr == '2' ? DS_YES
3646 : *ptr == '1' ? DS_NO
3649 addr->host_used = h;
3653 /* Finished with this address */
3660 /* Local interface address/port */
3662 if (*ptr) sending_ip_address = string_copy(ptr);
3664 if (*ptr) sending_port = atoi(CS ptr);
3668 /* Z marks the logical end of the data. It is followed by '0' if
3669 continue_transport was NULL at the end of transporting, otherwise '1'.
3670 We need to know when it becomes NULL during a delivery down a passed SMTP
3671 channel so that we don't try to pass anything more down it. Of course, for
3672 most normal messages it will remain NULL all the time. */
3677 continue_transport = NULL;
3678 continue_hostname = NULL;
3681 DEBUG(D_deliver) debug_printf("Z0%c item read\n", *ptr);
3684 /* Anything else is a disaster. */
3687 msg = string_sprintf("malformed data (%d) read from pipe for transport "
3688 "process %d for transport %s", ptr[-1], pid,
3689 addr->transport->driver_name);
3695 /* The done flag is inspected externally, to determine whether or not to
3696 call the function again when the process finishes. */
3700 /* If the process hadn't finished, and we haven't seen the end of the data
3701 or suffered a disaster, update the rest of the state, and return FALSE to
3702 indicate "not finished". */
3711 /* Close our end of the pipe, to prevent deadlock if the far end is still
3712 pushing stuff into it. */
3717 /* If we have finished without error, but haven't had data for every address,
3718 something is wrong. */
3721 msg = string_sprintf("insufficient address data read from pipe "
3722 "for transport process %d for transport %s", pid,
3723 addr->transport->driver_name);
3725 /* If an error message is set, something has gone wrong in getting back
3726 the delivery data. Put the message into each address and freeze it. */
3729 for (addr = addrlist; addr; addr = addr->next)
3731 addr->transport_return = DEFER;
3732 addr->special_action = SPECIAL_FREEZE;
3733 addr->message = msg;
3736 /* Return TRUE to indicate we have got all we need from this process, even
3737 if it hasn't actually finished yet. */
3744 /*************************************************
3745 * Post-process a set of remote addresses *
3746 *************************************************/
3748 /* Do what has to be done immediately after a remote delivery for each set of
3749 addresses, then re-write the spool if necessary. Note that post_process_one
3750 puts the address on an appropriate queue; hence we must fish off the next
3751 one first. This function is also called if there is a problem with setting
3752 up a subprocess to do a remote delivery in parallel. In this case, the final
3753 argument contains a message, and the action must be forced to DEFER.
3756 addr pointer to chain of address items
3757 logflags flags for logging
3758 msg NULL for normal cases; -> error message for unexpected problems
3759 fallback TRUE if processing fallback hosts
3765 remote_post_process(address_item *addr, int logflags, uschar *msg,
3770 /* If any host addresses were found to be unusable, add them to the unusable
3771 tree so that subsequent deliveries don't try them. */
3773 for (h = addr->host_list; h; h = h->next)
3775 if (h->status >= hstatus_unusable) tree_add_unusable(h);
3777 /* Now handle each address on the chain. The transport has placed '=' or '-'
3778 into the special_action field for each successful delivery. */
3782 address_item *next = addr->next;
3784 /* If msg == NULL (normal processing) and the result is DEFER and we are
3785 processing the main hosts and there are fallback hosts available, put the
3786 address on the list for fallback delivery. */
3788 if ( addr->transport_return == DEFER
3789 && addr->fallback_hosts
3794 addr->host_list = addr->fallback_hosts;
3795 addr->next = addr_fallback;
3796 addr_fallback = addr;
3797 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", addr->address);
3800 /* If msg is set (=> unexpected problem), set it in the address before
3801 doing the ordinary post processing. */
3807 addr->message = msg;
3808 addr->transport_return = DEFER;
3810 (void)post_process_one(addr, addr->transport_return, logflags,
3811 DTYPE_TRANSPORT, addr->special_action);
3819 /* If we have just delivered down a passed SMTP channel, and that was
3820 the last address, the channel will have been closed down. Now that
3821 we have logged that delivery, set continue_sequence to 1 so that
3822 any subsequent deliveries don't get "*" incorrectly logged. */
3824 if (!continue_transport) continue_sequence = 1;
3829 /*************************************************
3830 * Wait for one remote delivery subprocess *
3831 *************************************************/
3833 /* This function is called while doing remote deliveries when either the
3834 maximum number of processes exist and we need one to complete so that another
3835 can be created, or when waiting for the last ones to complete. It must wait for
3836 the completion of one subprocess, empty the control block slot, and return a
3837 pointer to the address chain.
3840 Returns: pointer to the chain of addresses handled by the process;
3841 NULL if no subprocess found - this is an unexpected error
3844 static address_item *
3847 int poffset, status;
3848 address_item *addr, *addrlist;
3851 set_process_info("delivering %s: waiting for a remote delivery subprocess "
3852 "to finish", message_id);
3854 /* Loop until either a subprocess completes, or there are no subprocesses in
3855 existence - in which case give an error return. We cannot proceed just by
3856 waiting for a completion, because a subprocess may have filled up its pipe, and
3857 be waiting for it to be emptied. Therefore, if no processes have finished, we
3858 wait for one of the pipes to acquire some data by calling select(), with a
3859 timeout just in case.
3861 The simple approach is just to iterate after reading data from a ready pipe.
3862 This leads to non-ideal behaviour when the subprocess has written its final Z
3863 item, closed the pipe, and is in the process of exiting (the common case). A
3864 call to waitpid() yields nothing completed, but select() shows the pipe ready -
3865 reading it yields EOF, so you end up with busy-waiting until the subprocess has
3868 To avoid this, if all the data that is needed has been read from a subprocess
3869 after select(), an explicit wait() for it is done. We know that all it is doing
3870 is writing to the pipe and then exiting, so the wait should not be long.
3872 The non-blocking waitpid() is to some extent just insurance; if we could
3873 reliably detect end-of-file on the pipe, we could always know when to do a
3874 blocking wait() for a completed process. However, because some systems use
3875 NDELAY, which doesn't distinguish between EOF and pipe empty, it is easier to
3876 use code that functions without the need to recognize EOF.
3878 There's a double loop here just in case we end up with a process that is not in
3879 the list of remote delivery processes. Something has obviously gone wrong if
3880 this is the case. (For example, a process that is incorrectly left over from
3881 routing or local deliveries might be found.) The damage can be minimized by
3882 looping back and looking for another process. If there aren't any, the error
3883 return will happen. */
3885 for (;;) /* Normally we do not repeat this loop */
3887 while ((pid = waitpid(-1, &status, WNOHANG)) <= 0)
3890 fd_set select_pipes;
3891 int maxpipe, readycount;
3893 /* A return value of -1 can mean several things. If errno != ECHILD, it
3894 either means invalid options (which we discount), or that this process was
3895 interrupted by a signal. Just loop to try the waitpid() again.
3897 If errno == ECHILD, waitpid() is telling us that there are no subprocesses
3898 in existence. This should never happen, and is an unexpected error.
3899 However, there is a nasty complication when running under Linux. If "strace
3900 -f" is being used under Linux to trace this process and its children,
3901 subprocesses are "stolen" from their parents and become the children of the
3902 tracing process. A general wait such as the one we've just obeyed returns
3903 as if there are no children while subprocesses are running. Once a
3904 subprocess completes, it is restored to the parent, and waitpid(-1) finds
3905 it. Thanks to Joachim Wieland for finding all this out and suggesting a
3908 This does not happen using "truss" on Solaris, nor (I think) with other
3909 tracing facilities on other OS. It seems to be specific to Linux.
3911 What we do to get round this is to use kill() to see if any of our
3912 subprocesses are still in existence. If kill() gives an OK return, we know
3913 it must be for one of our processes - it can't be for a re-use of the pid,
3914 because if our process had finished, waitpid() would have found it. If any
3915 of our subprocesses are in existence, we proceed to use select() as if
3916 waitpid() had returned zero. I think this is safe. */
3920 if (errno != ECHILD) continue; /* Repeats the waitpid() */
3923 debug_printf("waitpid() returned -1/ECHILD: checking explicitly "
3924 "for process existence\n");
3926 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3928 if ((pid = parlist[poffset].pid) != 0 && kill(pid, 0) == 0)
3930 DEBUG(D_deliver) debug_printf("process %d still exists: assume "
3931 "stolen by strace\n", (int)pid);
3932 break; /* With poffset set */
3936 if (poffset >= remote_max_parallel)
3938 DEBUG(D_deliver) debug_printf("*** no delivery children found\n");
3939 return NULL; /* This is the error return */
3943 /* A pid value greater than 0 breaks the "while" loop. A negative value has
3944 been handled above. A return value of zero means that there is at least one
3945 subprocess, but there are no completed subprocesses. See if any pipes are
3946 ready with any data for reading. */
3948 DEBUG(D_deliver) debug_printf("selecting on subprocess pipes\n");
3951 FD_ZERO(&select_pipes);
3952 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3953 if (parlist[poffset].pid != 0)
3955 int fd = parlist[poffset].fd;
3956 FD_SET(fd, &select_pipes);
3957 if (fd > maxpipe) maxpipe = fd;
3960 /* Stick in a 60-second timeout, just in case. */
3965 readycount = select(maxpipe + 1, (SELECT_ARG2_TYPE *)&select_pipes,
3968 /* Scan through the pipes and read any that are ready; use the count
3969 returned by select() to stop when there are no more. Select() can return
3970 with no processes (e.g. if interrupted). This shouldn't matter.
3972 If par_read_pipe() returns TRUE, it means that either the terminating Z was
3973 read, or there was a disaster. In either case, we are finished with this
3974 process. Do an explicit wait() for the process and break the main loop if
3977 It turns out that we have to deal with the case of an interrupted system
3978 call, which can happen on some operating systems if the signal handling is
3979 set up to do that by default. */
3982 readycount > 0 && poffset < remote_max_parallel;
3985 if ( (pid = parlist[poffset].pid) != 0
3986 && FD_ISSET(parlist[poffset].fd, &select_pipes)
3990 if (par_read_pipe(poffset, FALSE)) /* Finished with this pipe */
3991 for (;;) /* Loop for signals */
3993 pid_t endedpid = waitpid(pid, &status, 0);
3994 if (endedpid == pid) goto PROCESS_DONE;
3995 if (endedpid != (pid_t)(-1) || errno != EINTR)
3996 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Unexpected error return "
3997 "%d (errno = %d) from waitpid() for process %d",
3998 (int)endedpid, errno, (int)pid);
4003 /* Now go back and look for a completed subprocess again. */
4006 /* A completed process was detected by the non-blocking waitpid(). Find the
4007 data block that corresponds to this subprocess. */
4009 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4010 if (pid == parlist[poffset].pid) break;
4012 /* Found the data block; this is a known remote delivery process. We don't
4013 need to repeat the outer loop. This should be what normally happens. */
4015 if (poffset < remote_max_parallel) break;
4017 /* This situation is an error, but it's probably better to carry on looking
4018 for another process than to give up (as we used to do). */
4020 log_write(0, LOG_MAIN|LOG_PANIC, "Process %d finished: not found in remote "
4021 "transport process list", pid);
4022 } /* End of the "for" loop */
4024 /* Come here when all the data was completely read after a select(), and
4025 the process in pid has been wait()ed for. */
4032 debug_printf("remote delivery process %d ended\n", (int)pid);
4034 debug_printf("remote delivery process %d ended: status=%04x\n", (int)pid,
4038 set_process_info("delivering %s", message_id);
4040 /* Get the chain of processed addresses */
4042 addrlist = parlist[poffset].addrlist;
4044 /* If the process did not finish cleanly, record an error and freeze (except
4045 for SIGTERM, SIGKILL and SIGQUIT), and also ensure the journal is not removed,
4046 in case the delivery did actually happen. */
4048 if ((status & 0xffff) != 0)
4051 int msb = (status >> 8) & 255;
4052 int lsb = status & 255;
4053 int code = (msb == 0)? (lsb & 0x7f) : msb;
4055 msg = string_sprintf("%s transport process returned non-zero status 0x%04x: "
4057 addrlist->transport->driver_name,
4059 (msb == 0)? "terminated by signal" : "exit code",
4062 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
4063 addrlist->special_action = SPECIAL_FREEZE;
4065 for (addr = addrlist; addr; addr = addr->next)
4067 addr->transport_return = DEFER;
4068 addr->message = msg;
4071 remove_journal = FALSE;
4074 /* Else complete reading the pipe to get the result of the delivery, if all
4075 the data has not yet been obtained. */
4077 else if (!parlist[poffset].done) (void)par_read_pipe(poffset, TRUE);
4079 /* Put the data count and return path into globals, mark the data slot unused,
4080 decrement the count of subprocesses, and return the address chain. */
4082 transport_count = parlist[poffset].transport_count;
4083 used_return_path = parlist[poffset].return_path;
4084 parlist[poffset].pid = 0;
4091 /*************************************************
4092 * Wait for subprocesses and post-process *
4093 *************************************************/
4095 /* This function waits for subprocesses until the number that are still running
4096 is below a given threshold. For each complete subprocess, the addresses are
4097 post-processed. If we can't find a running process, there is some shambles.
4098 Better not bomb out, as that might lead to multiple copies of the message. Just
4099 log and proceed as if all done.
4102 max maximum number of subprocesses to leave running
4103 fallback TRUE if processing fallback hosts
4109 par_reduce(int max, BOOL fallback)
4111 while (parcount > max)
4113 address_item *doneaddr = par_wait();
4116 log_write(0, LOG_MAIN|LOG_PANIC,
4117 "remote delivery process count got out of step");
4122 transport_instance * tp = doneaddr->transport;
4123 if (tp->max_parallel)
4124 enq_end(string_sprintf("tpt-serialize-%s", tp->name));
4126 remote_post_process(doneaddr, LOG_MAIN, NULL, fallback);
4135 rmt_dlv_checked_write(int fd, char id, char subid, void * buf, int size)
4137 uschar writebuffer[PIPE_HEADER_SIZE + BIG_BUFFER_SIZE];
4141 /* we assume that size can't get larger then BIG_BUFFER_SIZE which currently is set to 16k */
4142 /* complain to log if someone tries with buffer sizes we can't handle*/
4146 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4147 "Failed writing transport result to pipe: can't handle buffers > 99999 bytes. truncating!\n");
4151 /* to keep the write() atomic we build header in writebuffer and copy buf behind */
4152 /* two write() calls would increase the complexity of reading from pipe */
4154 /* convert size to human readable string prepended by id and subid */
4155 header_length = snprintf(CS writebuffer, PIPE_HEADER_SIZE+1, "%c%c%05d", id, subid, size);
4156 if (header_length != PIPE_HEADER_SIZE)
4158 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "header snprintf failed\n");
4159 writebuffer[0] = '\0';
4162 DEBUG(D_deliver) debug_printf("header write id:%c,subid:%c,size:%d,final:%s\n",
4163 id, subid, size, writebuffer);
4165 if (buf && size > 0)
4166 memcpy(writebuffer + PIPE_HEADER_SIZE, buf, size);
4168 size += PIPE_HEADER_SIZE;
4169 if ((ret = write(fd, writebuffer, size)) != size)
4170 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed writing transport result to pipe: %s\n",
4171 ret == -1 ? strerror(errno) : "short write");
4174 /*************************************************
4175 * Do remote deliveries *
4176 *************************************************/
4178 /* This function is called to process the addresses in addr_remote. We must
4179 pick off the queue all addresses that have the same transport, remote
4180 destination, and errors address, and hand them to the transport in one go,
4181 subject to some configured limitations. If this is a run to continue delivering
4182 to an existing delivery channel, skip all but those addresses that can go to
4183 that channel. The skipped addresses just get deferred.
4185 If mua_wrapper is set, all addresses must be able to be sent in a single
4186 transaction. If not, this function yields FALSE.
4188 In Exim 4, remote deliveries are always done in separate processes, even
4189 if remote_max_parallel = 1 or if there's only one delivery to do. The reason
4190 is so that the base process can retain privilege. This makes the
4191 implementation of fallback transports feasible (though not initially done.)
4193 We create up to the configured number of subprocesses, each of which passes
4194 back the delivery state via a pipe. (However, when sending down an existing
4195 connection, remote_max_parallel is forced to 1.)
4198 fallback TRUE if processing fallback hosts
4200 Returns: TRUE normally
4201 FALSE if mua_wrapper is set and the addresses cannot all be sent
4206 do_remote_deliveries(BOOL fallback)
4212 parcount = 0; /* Number of executing subprocesses */
4214 /* When sending down an existing channel, only do one delivery at a time.
4215 We use a local variable (parmax) to hold the maximum number of processes;
4216 this gets reduced from remote_max_parallel if we can't create enough pipes. */
4218 if (continue_transport) remote_max_parallel = 1;
4219 parmax = remote_max_parallel;
4221 /* If the data for keeping a list of processes hasn't yet been
4226 parlist = store_get(remote_max_parallel * sizeof(pardata));
4227 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4228 parlist[poffset].pid = 0;
4231 /* Now loop for each remote delivery */
4233 for (delivery_count = 0; addr_remote; delivery_count++)
4239 int address_count = 1;
4240 int address_count_max;
4242 BOOL use_initgroups;
4243 BOOL pipe_done = FALSE;
4244 transport_instance *tp;
4245 address_item **anchor = &addr_remote;
4246 address_item *addr = addr_remote;
4247 address_item *last = addr;
4250 uschar * serialize_key = NULL;
4252 /* Pull the first address right off the list. */
4254 addr_remote = addr->next;
4257 DEBUG(D_deliver|D_transport)
4258 debug_printf("--------> %s <--------\n", addr->address);
4260 /* If no transport has been set, there has been a big screw-up somewhere. */
4262 if (!(tp = addr->transport))
4264 disable_logging = FALSE; /* Jic */
4265 panicmsg = US"No transport set by router";
4266 goto panic_continue;
4269 /* Check that this base address hasn't previously been delivered to this
4270 transport. The check is necessary at this point to handle homonymic addresses
4271 correctly in cases where the pattern of redirection changes between delivery
4272 attempts. Non-homonymic previous delivery is detected earlier, at routing
4275 if (previously_transported(addr, FALSE)) continue;
4277 /* Force failure if the message is too big. */
4279 if (tp->message_size_limit)
4281 int rc = check_message_size(tp, addr);
4284 addr->transport_return = rc;
4285 remote_post_process(addr, LOG_MAIN, NULL, fallback);
4290 /* Get the flag which specifies whether the transport can handle different
4291 domains that nevertheless resolve to the same set of hosts. If it needs
4292 expanding, get variables set: $address_data, $domain_data, $localpart_data,
4293 $host, $host_address, $host_port. */
4294 if (tp->expand_multi_domain)
4295 deliver_set_expansions(addr);
4297 if (exp_bool(addr, US"transport", tp->name, D_transport,
4298 US"multi_domain", tp->multi_domain, tp->expand_multi_domain,
4299 &multi_domain) != OK)
4301 deliver_set_expansions(NULL);
4302 panicmsg = addr->message;
4303 goto panic_continue;
4306 /* Get the maximum it can handle in one envelope, with zero meaning
4307 unlimited, which is forced for the MUA wrapper case. */
4309 address_count_max = tp->max_addresses;
4310 if (address_count_max == 0 || mua_wrapper) address_count_max = 999999;
4313 /************************************************************************/
4314 /***** This is slightly experimental code, but should be safe. *****/
4316 /* The address_count_max value is the maximum number of addresses that the
4317 transport can send in one envelope. However, the transport must be capable of
4318 dealing with any number of addresses. If the number it gets exceeds its
4319 envelope limitation, it must send multiple copies of the message. This can be
4320 done over a single connection for SMTP, so uses less resources than making
4321 multiple connections. On the other hand, if remote_max_parallel is greater
4322 than one, it is perhaps a good idea to use parallel processing to move the
4323 message faster, even if that results in multiple simultaneous connections to
4326 How can we come to some compromise between these two ideals? What we do is to
4327 limit the number of addresses passed to a single instance of a transport to
4328 the greater of (a) its address limit (rcpt_max for SMTP) and (b) the total
4329 number of addresses routed to remote transports divided by
4330 remote_max_parallel. For example, if the message has 100 remote recipients,
4331 remote max parallel is 2, and rcpt_max is 10, we'd never send more than 50 at
4332 once. But if rcpt_max is 100, we could send up to 100.
4334 Of course, not all the remotely addresses in a message are going to go to the
4335 same set of hosts (except in smarthost configurations), so this is just a
4336 heuristic way of dividing up the work.
4338 Furthermore (1), because this may not be wanted in some cases, and also to
4339 cope with really pathological cases, there is also a limit to the number of
4340 messages that are sent over one connection. This is the same limit that is
4341 used when sending several different messages over the same connection.
4342 Continue_sequence is set when in this situation, to the number sent so
4343 far, including this message.
4345 Furthermore (2), when somebody explicitly sets the maximum value to 1, it
4346 is probably because they are using VERP, in which case they want to pass only
4347 one address at a time to the transport, in order to be able to use
4348 $local_part and $domain in constructing a new return path. We could test for
4349 the use of these variables, but as it is so likely they will be used when the
4350 maximum is 1, we don't bother. Just leave the value alone. */
4352 if ( address_count_max != 1
4353 && address_count_max < remote_delivery_count/remote_max_parallel
4356 int new_max = remote_delivery_count/remote_max_parallel;
4357 int message_max = tp->connection_max_messages;
4358 if (connection_max_messages >= 0) message_max = connection_max_messages;
4359 message_max -= continue_sequence - 1;
4360 if (message_max > 0 && new_max > address_count_max * message_max)
4361 new_max = address_count_max * message_max;
4362 address_count_max = new_max;
4365 /************************************************************************/
4368 /* Pick off all addresses which have the same transport, errors address,
4369 destination, and extra headers. In some cases they point to the same host
4370 list, but we also need to check for identical host lists generated from
4371 entirely different domains. The host list pointers can be NULL in the case
4372 where the hosts are defined in the transport. There is also a configured
4373 maximum limit of addresses that can be handled at once (see comments above
4374 for how it is computed).
4375 If the transport does not handle multiple domains, enforce that also,
4376 and if it might need a per-address check for this, re-evaluate it.
4379 while ((next = *anchor) && address_count < address_count_max)
4382 if ( (multi_domain || Ustrcmp(next->domain, addr->domain) == 0)
4383 && tp == next->transport
4384 && same_hosts(next->host_list, addr->host_list)
4385 && same_strings(next->prop.errors_address, addr->prop.errors_address)
4386 && same_headers(next->prop.extra_headers, addr->prop.extra_headers)
4387 && same_ugid(tp, next, addr)
4388 && ( next->prop.remove_headers == addr->prop.remove_headers
4389 || ( next->prop.remove_headers
4390 && addr->prop.remove_headers
4391 && Ustrcmp(next->prop.remove_headers, addr->prop.remove_headers) == 0
4395 (void)(!tp->expand_multi_domain || ((void)deliver_set_expansions(next), 1)),
4397 US"transport", next->transport->name, D_transport,
4398 US"multi_domain", next->transport->multi_domain,
4399 next->transport->expand_multi_domain, &md) == OK
4404 *anchor = next->next;
4406 next->first = addr; /* remember top one (for retry processing) */
4411 else anchor = &(next->next);
4412 deliver_set_expansions(NULL);
4415 /* If we are acting as an MUA wrapper, all addresses must go in a single
4416 transaction. If not, put them back on the chain and yield FALSE. */
4418 if (mua_wrapper && addr_remote)
4420 last->next = addr_remote;
4425 /* If the transport is limited for parallellism, enforce that here.
4426 The hints DB entry is decremented in par_reduce(), when we reap the
4427 transport process. */
4429 if (tpt_parallel_check(tp, addr, &serialize_key))
4430 if ((panicmsg = expand_string_message))
4431 goto panic_continue;
4433 continue; /* Loop for the next set of addresses. */
4435 /* Set up the expansion variables for this set of addresses */
4437 deliver_set_expansions(addr);
4439 /* Ensure any transport-set auth info is fresh */
4440 addr->authenticator = addr->auth_id = addr->auth_sndr = NULL;
4442 /* Compute the return path, expanding a new one if required. The old one
4443 must be set first, as it might be referred to in the expansion. */
4445 if(addr->prop.errors_address)
4446 return_path = addr->prop.errors_address;
4447 #ifdef EXPERIMENTAL_SRS
4448 else if(addr->prop.srs_sender)
4449 return_path = addr->prop.srs_sender;
4452 return_path = sender_address;
4454 if (tp->return_path)
4456 uschar *new_return_path = expand_string(tp->return_path);
4457 if (new_return_path)
4458 return_path = new_return_path;
4459 else if (!expand_string_forcedfail)
4461 panicmsg = string_sprintf("Failed to expand return path \"%s\": %s",
4462 tp->return_path, expand_string_message);
4467 /* Find the uid, gid, and use_initgroups setting for this transport. Failure
4468 logs and sets up error messages, so we just post-process and continue with
4469 the next address. */
4471 if (!findugid(addr, tp, &uid, &gid, &use_initgroups))
4477 /* If this transport has a setup function, call it now so that it gets
4478 run in this process and not in any subprocess. That way, the results of
4479 any setup that are retained by the transport can be reusable. One of the
4480 things the setup does is to set the fallback host lists in the addresses.
4481 That is why it is called at this point, before the continue delivery
4482 processing, because that might use the fallback hosts. */
4485 (void)((tp->setup)(addr->transport, addr, NULL, uid, gid, NULL));
4487 /* If we have a connection still open from a verify stage (lazy-close)
4488 treat it as if it is a continued connection (apart from the counter used
4489 for the log line mark). */
4491 if (cutthrough.fd >= 0 && cutthrough.callout_hold_only)
4494 debug_printf("lazy-callout-close: have conn still open from verification\n");
4495 continue_transport = cutthrough.transport;
4496 continue_hostname = string_copy(cutthrough.host.name);
4497 continue_host_address = string_copy(cutthrough.host.address);
4498 continue_sequence = 1;
4499 sending_ip_address = cutthrough.snd_ip;
4500 sending_port = cutthrough.snd_port;
4501 smtp_peer_options = cutthrough.peer_options;
4504 /* If this is a run to continue delivery down an already-established
4505 channel, check that this set of addresses matches the transport and
4506 the channel. If it does not, defer the addresses. If a host list exists,
4507 we must check that the continue host is on the list. Otherwise, the
4508 host is set in the transport. */
4510 continue_more = FALSE; /* In case got set for the last lot */
4511 if (continue_transport)
4513 BOOL ok = Ustrcmp(continue_transport, tp->name) == 0;
4515 /* If the transport is about to override the host list do not check
4516 it here but take the cost of running the transport process to discover
4517 if the continued_hostname connection is suitable. This is a layering
4518 violation which is unfortunate as it requires we haul in the smtp
4523 smtp_transport_options_block * ob;
4525 if ( !( Ustrcmp(tp->info->driver_name, "smtp") == 0
4526 && (ob = (smtp_transport_options_block *)tp->options_block)
4527 && ob->hosts_override && ob->hosts
4534 for (h = addr->host_list; h; h = h->next)
4535 if (Ustrcmp(h->name, continue_hostname) == 0)
4536 /*XXX should also check port here */
4537 { ok = TRUE; break; }
4541 /* Addresses not suitable; defer or queue for fallback hosts (which
4542 might be the continue host) and skip to next address. */
4546 DEBUG(D_deliver) debug_printf("not suitable for continue_transport (%s)\n",
4547 Ustrcmp(continue_transport, tp->name) != 0
4548 ? string_sprintf("tpt %s vs %s", continue_transport, tp->name)
4549 : string_sprintf("no host matching %s", continue_hostname));
4550 if (serialize_key) enq_end(serialize_key);
4552 if (addr->fallback_hosts && !fallback)
4554 for (next = addr; ; next = next->next)
4556 next->host_list = next->fallback_hosts;
4557 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", next->address);
4558 if (!next->next) break;
4560 next->next = addr_fallback;
4561 addr_fallback = addr;
4566 for (next = addr; ; next = next->next)
4568 DEBUG(D_deliver) debug_printf(" %s to def list\n", next->address);
4569 if (!next->next) break;
4571 next->next = addr_defer;
4578 /* Set a flag indicating whether there are further addresses that list
4579 the continued host. This tells the transport to leave the channel open,
4580 but not to pass it to another delivery process. We'd like to do that
4581 for non-continue_transport cases too but the knowlege of which host is
4582 connected to is too hard to manage. Perhaps we need a finer-grain
4583 interface to the transport. */
4585 for (next = addr_remote; next && !continue_more; next = next->next)
4588 for (h = next->host_list; h; h = h->next)
4589 if (Ustrcmp(h->name, continue_hostname) == 0)
4590 { continue_more = TRUE; break; }
4594 /* The transports set up the process info themselves as they may connect
4595 to more than one remote machine. They also have to set up the filter
4596 arguments, if required, so that the host name and address are available
4599 transport_filter_argv = NULL;
4601 /* Create the pipe for inter-process communication. If pipe creation
4602 fails, it is probably because the value of remote_max_parallel is so
4603 large that too many file descriptors for pipes have been created. Arrange
4604 to wait for a process to finish, and then try again. If we still can't
4605 create a pipe when all processes have finished, break the retry loop. */
4609 if (pipe(pfd) == 0) pipe_done = TRUE;
4610 else if (parcount > 0) parmax = parcount;
4613 /* We need to make the reading end of the pipe non-blocking. There are
4614 two different options for this. Exim is cunningly (I hope!) coded so
4615 that it can use either of them, though it prefers O_NONBLOCK, which
4616 distinguishes between EOF and no-more-data. */
4618 /* The data appears in a timely manner and we already did a select on
4619 all pipes, so I do not see a reason to use non-blocking IO here
4622 (void)fcntl(pfd[pipe_read], F_SETFL, O_NONBLOCK);
4624 (void)fcntl(pfd[pipe_read], F_SETFL, O_NDELAY);
4628 /* If the maximum number of subprocesses already exist, wait for a process
4629 to finish. If we ran out of file descriptors, parmax will have been reduced
4630 from its initial value of remote_max_parallel. */
4632 par_reduce(parmax - 1, fallback);
4635 /* If we failed to create a pipe and there were no processes to wait
4636 for, we have to give up on this one. Do this outside the above loop
4637 so that we can continue the main loop. */
4641 panicmsg = string_sprintf("unable to create pipe: %s", strerror(errno));
4645 /* Find a free slot in the pardata list. Must do this after the possible
4646 waiting for processes to finish, because a terminating process will free
4649 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4650 if (parlist[poffset].pid == 0)
4653 /* If there isn't one, there has been a horrible disaster. */
4655 if (poffset >= remote_max_parallel)
4657 (void)close(pfd[pipe_write]);
4658 (void)close(pfd[pipe_read]);
4659 panicmsg = US"Unexpectedly no free subprocess slot";
4663 /* Now fork a subprocess to do the remote delivery, but before doing so,
4664 ensure that any cached resources are released so as not to interfere with
4665 what happens in the subprocess. */
4669 if ((pid = fork()) == 0)
4671 int fd = pfd[pipe_write];
4674 /* Setting this global in the subprocess means we need never clear it */
4675 transport_name = tp->name;
4677 /* There are weird circumstances in which logging is disabled */
4678 disable_logging = tp->disable_logging;
4680 /* Show pids on debug output if parallelism possible */
4682 if (parmax > 1 && (parcount > 0 || addr_remote))
4684 DEBUG(D_any|D_v) debug_selector |= D_pid;
4685 DEBUG(D_deliver) debug_printf("Remote delivery process started\n");
4688 /* Reset the random number generator, so different processes don't all
4689 have the same sequence. In the test harness we want different, but
4690 predictable settings for each delivery process, so do something explicit
4691 here rather they rely on the fixed reset in the random number function. */
4693 random_seed = running_in_test_harness ? 42 + 2*delivery_count : 0;
4695 /* Set close-on-exec on the pipe so that it doesn't get passed on to
4696 a new process that may be forked to do another delivery down the same
4699 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
4701 /* Close open file descriptors for the pipes of other processes
4702 that are running in parallel. */
4704 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4705 if (parlist[poffset].pid != 0) (void)close(parlist[poffset].fd);
4707 /* This process has inherited a copy of the file descriptor
4708 for the data file, but its file pointer is shared with all the
4709 other processes running in parallel. Therefore, we have to re-open
4710 the file in order to get a new file descriptor with its own
4711 file pointer. We don't need to lock it, as the lock is held by
4712 the parent process. There doesn't seem to be any way of doing
4713 a dup-with-new-file-pointer. */
4715 (void)close(deliver_datafile);
4717 uschar * fname = spool_fname(US"input", message_subdir, message_id, US"-D");
4719 if ((deliver_datafile = Uopen(fname,
4723 O_RDWR | O_APPEND, 0)) < 0)
4724 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to reopen %s for remote "
4725 "parallel delivery: %s", fname, strerror(errno));
4728 /* Set the close-on-exec flag */
4730 (void)fcntl(deliver_datafile, F_SETFD, fcntl(deliver_datafile, F_GETFD) |
4734 /* Set the uid/gid of this process; bombs out on failure. */
4736 exim_setugid(uid, gid, use_initgroups,
4737 string_sprintf("remote delivery to %s with transport=%s",
4738 addr->address, tp->name));
4740 /* Close the unwanted half of this process' pipe, set the process state,
4741 and run the transport. Afterwards, transport_count will contain the number
4742 of bytes written. */
4744 (void)close(pfd[pipe_read]);
4745 set_process_info("delivering %s using %s", message_id, tp->name);
4746 debug_print_string(tp->debug_string);
4747 if (!(tp->info->code)(addr->transport, addr)) replicate_status(addr);
4749 set_process_info("delivering %s (just run %s for %s%s in subprocess)",
4750 message_id, tp->name, addr->address, addr->next ? ", ..." : "");
4752 /* Ensure any cached resources that we used are now released */
4756 /* Pass the result back down the pipe. This is a lot more information
4757 than is needed for a local delivery. We have to send back the error
4758 status for each address, the usability status for each host that is
4759 flagged as unusable, and all the retry items. When TLS is in use, we
4760 send also the cipher and peerdn information. Each type of information
4761 is flagged by an identifying byte, and is then in a fixed format (with
4762 strings terminated by zeros), and there is a final terminator at the
4763 end. The host information and retry information is all attached to
4764 the first address, so that gets sent at the start. */
4766 /* Host unusability information: for most success cases this will
4769 for (h = addr->host_list; h; h = h->next)
4771 if (!h->address || h->status < hstatus_unusable) continue;
4772 sprintf(CS big_buffer, "%c%c%s", h->status, h->why, h->address);
4773 rmt_dlv_checked_write(fd, 'H', '0', big_buffer, Ustrlen(big_buffer+2) + 3);
4776 /* The number of bytes written. This is the same for each address. Even
4777 if we sent several copies of the message down the same connection, the
4778 size of each one is the same, and it's that value we have got because
4779 transport_count gets reset before calling transport_write_message(). */
4781 memcpy(big_buffer, &transport_count, sizeof(transport_count));
4782 rmt_dlv_checked_write(fd, 'S', '0', big_buffer, sizeof(transport_count));
4784 /* Information about what happened to each address. Four item types are
4785 used: an optional 'X' item first, for TLS information, then an optional "C"
4786 item for any client-auth info followed by 'R' items for any retry settings,
4787 and finally an 'A' item for the remaining data. */
4789 for(; addr; addr = addr->next)
4794 /* The certificate verification status goes into the flags */
4795 if (tls_out.certificate_verified) setflag(addr, af_cert_verified);
4796 #ifdef EXPERIMENTAL_DANE
4797 if (tls_out.dane_verified) setflag(addr, af_dane_verified);
4800 /* Use an X item only if there's something to send */
4804 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", addr->cipher) + 1;
4808 ptr += sprintf(CS ptr, "%.512s", addr->peerdn) + 1;
4810 rmt_dlv_checked_write(fd, 'X', '1', big_buffer, ptr - big_buffer);
4812 else if (continue_proxy_cipher)
4814 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", continue_proxy_cipher) + 1;
4816 rmt_dlv_checked_write(fd, 'X', '1', big_buffer, ptr - big_buffer);
4822 if (!tls_export_cert(ptr, big_buffer_size-2, addr->peercert))
4826 rmt_dlv_checked_write(fd, 'X', '2', big_buffer, ptr - big_buffer);
4831 if (!tls_export_cert(ptr, big_buffer_size-2, addr->ourcert))
4835 rmt_dlv_checked_write(fd, 'X', '3', big_buffer, ptr - big_buffer);
4837 # ifndef DISABLE_OCSP
4838 if (addr->ocsp > OCSP_NOT_REQ)
4840 ptr = big_buffer + sprintf(CS big_buffer, "%c", addr->ocsp + '0') + 1;
4841 rmt_dlv_checked_write(fd, 'X', '4', big_buffer, ptr - big_buffer);
4844 #endif /*SUPPORT_TLS*/
4846 if (client_authenticator)
4848 ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticator) + 1;
4849 rmt_dlv_checked_write(fd, 'C', '1', big_buffer, ptr - big_buffer);
4851 if (client_authenticated_id)
4853 ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticated_id) + 1;
4854 rmt_dlv_checked_write(fd, 'C', '2', big_buffer, ptr - big_buffer);
4856 if (client_authenticated_sender)
4858 ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticated_sender) + 1;
4859 rmt_dlv_checked_write(fd, 'C', '3', big_buffer, ptr - big_buffer);
4862 #ifndef DISABLE_PRDR
4863 if (testflag(addr, af_prdr_used))
4864 rmt_dlv_checked_write(fd, 'P', '0', NULL, 0);
4867 if (testflag(addr, af_chunking_used))
4868 rmt_dlv_checked_write(fd, 'K', '0', NULL, 0);
4870 if (testflag(addr, af_tcp_fastopen))
4871 rmt_dlv_checked_write(fd, 'T', '0', NULL, 0);
4873 memcpy(big_buffer, &addr->dsn_aware, sizeof(addr->dsn_aware));
4874 rmt_dlv_checked_write(fd, 'D', '0', big_buffer, sizeof(addr->dsn_aware));
4876 /* Retry information: for most success cases this will be null. */
4878 for (r = addr->retries; r; r = r->next)
4880 sprintf(CS big_buffer, "%c%.500s", r->flags, r->key);
4881 ptr = big_buffer + Ustrlen(big_buffer+2) + 3;
4882 memcpy(ptr, &r->basic_errno, sizeof(r->basic_errno));
4883 ptr += sizeof(r->basic_errno);
4884 memcpy(ptr, &r->more_errno, sizeof(r->more_errno));
4885 ptr += sizeof(r->more_errno);
4886 if (!r->message) *ptr++ = 0; else
4888 sprintf(CS ptr, "%.512s", r->message);
4891 rmt_dlv_checked_write(fd, 'R', '0', big_buffer, ptr - big_buffer);
4894 #ifdef SUPPORT_SOCKS
4895 if (LOGGING(proxy) && proxy_session)
4898 if (proxy_local_address)
4900 DEBUG(D_deliver) debug_printf("proxy_local_address '%s'\n", proxy_local_address);
4901 ptr = big_buffer + sprintf(CS ptr, "%.128s", proxy_local_address) + 1;
4902 DEBUG(D_deliver) debug_printf("proxy_local_port %d\n", proxy_local_port);
4903 memcpy(ptr, &proxy_local_port, sizeof(proxy_local_port));
4904 ptr += sizeof(proxy_local_port);
4908 rmt_dlv_checked_write(fd, 'A', '2', big_buffer, ptr - big_buffer);
4912 #ifdef EXPERIMENTAL_DSN_INFO
4913 /*um, are they really per-addr? Other per-conn stuff is not (auth, tls). But host_used is! */
4914 if (addr->smtp_greeting)
4916 DEBUG(D_deliver) debug_printf("smtp_greeting '%s'\n", addr->smtp_greeting);
4917 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", addr->smtp_greeting) + 1;
4918 if (addr->helo_response)
4920 DEBUG(D_deliver) debug_printf("helo_response '%s'\n", addr->helo_response);
4921 ptr += sprintf(CS ptr, "%.128s", addr->helo_response) + 1;
4925 rmt_dlv_checked_write(fd, 'A', '1', big_buffer, ptr - big_buffer);
4929 /* The rest of the information goes in an 'A0' item. */
4931 sprintf(CS big_buffer, "%c%c", addr->transport_return, addr->special_action);
4932 ptr = big_buffer + 2;
4933 memcpy(ptr, &addr->basic_errno, sizeof(addr->basic_errno));
4934 ptr += sizeof(addr->basic_errno);
4935 memcpy(ptr, &addr->more_errno, sizeof(addr->more_errno));
4936 ptr += sizeof(addr->more_errno);
4937 memcpy(ptr, &addr->delivery_usec, sizeof(addr->delivery_usec));
4938 ptr += sizeof(addr->delivery_usec);
4939 memcpy(ptr, &addr->flags, sizeof(addr->flags));
4940 ptr += sizeof(addr->flags);
4942 if (!addr->message) *ptr++ = 0; else
4943 ptr += sprintf(CS ptr, "%.1024s", addr->message) + 1;
4945 if (!addr->user_message) *ptr++ = 0; else
4946 ptr += sprintf(CS ptr, "%.1024s", addr->user_message) + 1;
4948 if (!addr->host_used) *ptr++ = 0; else
4950 ptr += sprintf(CS ptr, "%.256s", addr->host_used->name) + 1;
4951 ptr += sprintf(CS ptr, "%.64s", addr->host_used->address) + 1;
4952 memcpy(ptr, &addr->host_used->port, sizeof(addr->host_used->port));
4953 ptr += sizeof(addr->host_used->port);
4955 /* DNS lookup status */
4956 *ptr++ = addr->host_used->dnssec==DS_YES ? '2'
4957 : addr->host_used->dnssec==DS_NO ? '1' : '0';
4960 rmt_dlv_checked_write(fd, 'A', '0', big_buffer, ptr - big_buffer);
4963 /* Local interface address/port */
4964 #ifdef EXPERIMENTAL_DSN_INFO
4965 if (sending_ip_address)
4967 if (LOGGING(incoming_interface) && sending_ip_address)
4971 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", sending_ip_address) + 1;
4972 ptr += sprintf(CS ptr, "%d", sending_port) + 1;
4973 rmt_dlv_checked_write(fd, 'I', '0', big_buffer, ptr - big_buffer);
4976 /* Add termination flag, close the pipe, and that's it. The character
4977 after 'Z' indicates whether continue_transport is now NULL or not.
4978 A change from non-NULL to NULL indicates a problem with a continuing
4981 big_buffer[0] = continue_transport ? '1' : '0';
4982 rmt_dlv_checked_write(fd, 'Z', '0', big_buffer, 1);
4987 /* Back in the mainline: close the unwanted half of the pipe. */
4989 (void)close(pfd[pipe_write]);
4991 /* If we have a connection still open from a verify stage (lazy-close)
4992 release its TLS library context (if any) as responsibility was passed to
4993 the delivery child process. */
4995 if (cutthrough.fd >= 0 && cutthrough.callout_hold_only)
4998 tls_close(FALSE, FALSE);
5000 (void) close(cutthrough.fd);
5001 release_cutthrough_connection(US"passed to transport proc");
5004 /* Fork failed; defer with error message */
5008 (void)close(pfd[pipe_read]);
5009 panicmsg = string_sprintf("fork failed for remote delivery to %s: %s",
5010 addr->domain, strerror(errno));
5014 /* Fork succeeded; increment the count, and remember relevant data for
5015 when the process finishes. */
5018 parlist[poffset].addrlist = parlist[poffset].addr = addr;
5019 parlist[poffset].pid = pid;
5020 parlist[poffset].fd = pfd[pipe_read];
5021 parlist[poffset].done = FALSE;
5022 parlist[poffset].msg = NULL;
5023 parlist[poffset].return_path = return_path;
5025 /* If the process we've just started is sending a message down an existing
5026 channel, wait for it now. This ensures that only one such process runs at
5027 once, whatever the value of remote_max parallel. Otherwise, we might try to
5028 send two or more messages simultaneously down the same channel. This could
5029 happen if there are different domains that include the same host in otherwise
5030 different host lists.
5032 Also, if the transport closes down the channel, this information gets back
5033 (continue_transport gets set to NULL) before we consider any other addresses
5036 if (continue_transport) par_reduce(0, fallback);
5038 /* Otherwise, if we are running in the test harness, wait a bit, to let the
5039 newly created process get going before we create another process. This should
5040 ensure repeatability in the tests. We only need to wait a tad. */
5042 else if (running_in_test_harness) millisleep(500);
5047 if (serialize_key) enq_end(serialize_key);
5049 remote_post_process(addr, LOG_MAIN|LOG_PANIC, panicmsg, fallback);
5053 /* Reached the end of the list of addresses. Wait for all the subprocesses that
5054 are still running and post-process their addresses. */
5056 par_reduce(0, fallback);
5063 /*************************************************
5064 * Split an address into local part and domain *
5065 *************************************************/
5067 /* This function initializes an address for routing by splitting it up into a
5068 local part and a domain. The local part is set up twice - once in its original
5069 casing, and once in lower case, and it is dequoted. We also do the "percent
5070 hack" for configured domains. This may lead to a DEFER result if a lookup
5071 defers. When a percent-hacking takes place, we insert a copy of the original
5072 address as a new parent of this address, as if we have had a redirection.
5075 addr points to an addr_item block containing the address
5078 DEFER - could not determine if domain is %-hackable
5082 deliver_split_address(address_item * addr)
5084 uschar * address = addr->address;
5089 if (!(domain = Ustrrchr(address, '@')))
5090 return DEFER; /* should always have a domain, but just in case... */
5092 len = domain - address;
5093 addr->domain = string_copylc(domain+1); /* Domains are always caseless */
5095 /* The implication in the RFCs (though I can't say I've seen it spelled out
5096 explicitly) is that quoting should be removed from local parts at the point
5097 where they are locally interpreted. [The new draft "821" is more explicit on
5098 this, Jan 1999.] We know the syntax is valid, so this can be done by simply
5099 removing quoting backslashes and any unquoted doublequotes. */
5101 t = addr->cc_local_part = store_get(len+1);
5105 if (c == '\"') continue;
5115 /* We do the percent hack only for those domains that are listed in
5116 percent_hack_domains. A loop is required, to copy with multiple %-hacks. */
5118 if (percent_hack_domains)
5121 uschar *new_address = NULL;
5122 uschar *local_part = addr->cc_local_part;
5124 deliver_domain = addr->domain; /* set $domain */
5126 while ( (rc = match_isinlist(deliver_domain, (const uschar **)&percent_hack_domains, 0,
5127 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
5129 && (t = Ustrrchr(local_part, '%')) != NULL
5132 new_address = string_copy(local_part);
5133 new_address[t - local_part] = '@';
5134 deliver_domain = string_copylc(t+1);
5135 local_part = string_copyn(local_part, t - local_part);
5138 if (rc == DEFER) return DEFER; /* lookup deferred */
5140 /* If hackery happened, set up new parent and alter the current address. */
5144 address_item *new_parent = store_get(sizeof(address_item));
5145 *new_parent = *addr;
5146 addr->parent = new_parent;
5147 new_parent->child_count = 1;
5148 addr->address = new_address;
5149 addr->unique = string_copy(new_address);
5150 addr->domain = deliver_domain;
5151 addr->cc_local_part = local_part;
5152 DEBUG(D_deliver) debug_printf("%%-hack changed address to: %s\n",
5157 /* Create the lowercased version of the final local part, and make that the
5158 default one to be used. */
5160 addr->local_part = addr->lc_local_part = string_copylc(addr->cc_local_part);
5167 /*************************************************
5168 * Get next error message text *
5169 *************************************************/
5171 /* If f is not NULL, read the next "paragraph", from a customized error message
5172 text file, terminated by a line containing ****, and expand it.
5175 f NULL or a file to read from
5176 which string indicating which string (for errors)
5178 Returns: NULL or an expanded string
5182 next_emf(FILE *f, uschar *which)
5186 uschar *para, *yield;
5189 if (!f) return NULL;
5191 if (!Ufgets(buffer, sizeof(buffer), f) || Ustrcmp(buffer, "****\n") == 0)
5194 para = store_get(size);
5197 para = string_cat(para, &size, &ptr, buffer);
5198 if (!Ufgets(buffer, sizeof(buffer), f) || Ustrcmp(buffer, "****\n") == 0)
5203 if ((yield = expand_string(para)))
5206 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand string from "
5207 "bounce_message_file or warn_message_file (%s): %s", which,
5208 expand_string_message);
5215 /*************************************************
5216 * Close down a passed transport channel *
5217 *************************************************/
5219 /* This function is called when a passed transport channel cannot be used.
5220 It attempts to close it down tidily. The yield is always DELIVER_NOT_ATTEMPTED
5221 so that the function call can be the argument of a "return" statement.
5224 Returns: DELIVER_NOT_ATTEMPTED
5228 continue_closedown(void)
5230 if (continue_transport)
5232 transport_instance *t;
5233 for (t = transports; t; t = t->next)
5234 if (Ustrcmp(t->name, continue_transport) == 0)
5236 if (t->info->closedown) (t->info->closedown)(t);
5240 return DELIVER_NOT_ATTEMPTED;
5246 /*************************************************
5247 * Print address information *
5248 *************************************************/
5250 /* This function is called to output an address, or information about an
5251 address, for bounce or defer messages. If the hide_child flag is set, all we
5252 output is the original ancestor address.
5255 addr points to the address
5256 f the FILE to print to
5257 si an initial string
5258 sc a continuation string for before "generated"
5261 Returns: TRUE if the address is not hidden
5265 print_address_information(address_item *addr, FILE *f, uschar *si, uschar *sc,
5269 uschar *printed = US"";
5270 address_item *ancestor = addr;
5271 while (ancestor->parent) ancestor = ancestor->parent;
5273 fprintf(f, "%s", CS si);
5275 if (addr->parent && testflag(addr, af_hide_child))
5277 printed = US"an undisclosed address";
5280 else if (!testflag(addr, af_pfr) || !addr->parent)
5281 printed = addr->address;
5285 uschar *s = addr->address;
5288 if (addr->address[0] == '>') { ss = US"mail"; s++; }
5289 else if (addr->address[0] == '|') ss = US"pipe";
5292 fprintf(f, "%s to %s%sgenerated by ", ss, s, sc);
5293 printed = addr->parent->address;
5296 fprintf(f, "%s", CS string_printing(printed));
5298 if (ancestor != addr)
5300 uschar *original = ancestor->onetime_parent;
5301 if (!original) original= ancestor->address;
5302 if (strcmpic(original, printed) != 0)
5303 fprintf(f, "%s(%sgenerated from %s)", sc,
5304 ancestor != addr->parent ? "ultimately " : "",
5305 string_printing(original));
5308 if (addr->host_used)
5309 fprintf(f, "\n host %s [%s]",
5310 addr->host_used->name, addr->host_used->address);
5312 fprintf(f, "%s", CS se);
5320 /*************************************************
5321 * Print error for an address *
5322 *************************************************/
5324 /* This function is called to print the error information out of an address for
5325 a bounce or a warning message. It tries to format the message reasonably by
5326 introducing newlines. All lines are indented by 4; the initial printing
5327 position must be set before calling.
5329 This function used always to print the error. Nowadays we want to restrict it
5330 to cases such as LMTP/SMTP errors from a remote host, and errors from :fail:
5331 and filter "fail". We no longer pass other information willy-nilly in bounce
5332 and warning messages. Text in user_message is always output; text in message
5333 only if the af_pass_message flag is set.
5337 f the FILE to print on
5344 print_address_error(address_item *addr, FILE *f, uschar *t)
5346 int count = Ustrlen(t);
5347 uschar *s = testflag(addr, af_pass_message)? addr->message : NULL;
5349 if (!s && !(s = addr->user_message))
5352 fprintf(f, "\n %s", t);
5355 if (*s == '\\' && s[1] == 'n')
5365 if (*s++ == ':' && isspace(*s) && count > 45)
5367 fprintf(f, "\n "); /* sic (because space follows) */
5374 /***********************************************************
5375 * Print Diagnostic-Code for an address *
5376 ************************************************************/
5378 /* This function is called to print the error information out of an address for
5379 a bounce or a warning message. It tries to format the message reasonably as
5380 required by RFC 3461 by adding a space after each newline
5382 it uses the same logic as print_address_error() above. if af_pass_message is true
5383 and addr->message is set it uses the remote host answer. if not addr->user_message
5384 is used instead if available.
5388 f the FILE to print on
5394 print_dsn_diagnostic_code(const address_item *addr, FILE *f)
5396 uschar *s = testflag(addr, af_pass_message) ? addr->message : NULL;
5398 /* af_pass_message and addr->message set ? print remote host answer */
5402 debug_printf("DSN Diagnostic-Code: addr->message = %s\n", addr->message);
5404 /* search first ": ". we assume to find the remote-MTA answer there */
5405 if (!(s = Ustrstr(addr->message, ": ")))
5406 return; /* not found, bail out */
5407 s += 2; /* skip ": " */
5408 fprintf(f, "Diagnostic-Code: smtp; ");
5410 /* no message available. do nothing */
5414 if (*s == '\\' && s[1] == 'n')
5416 fputs("\n ", f); /* as defined in RFC 3461 */
5426 /*************************************************
5427 * Check list of addresses for duplication *
5428 *************************************************/
5430 /* This function was introduced when the test for duplicate addresses that are
5431 not pipes, files, or autoreplies was moved from the middle of routing to when
5432 routing was complete. That was to fix obscure cases when the routing history
5433 affects the subsequent routing of identical addresses. This function is called
5434 after routing, to check that the final routed addresses are not duplicates.
5436 If we detect a duplicate, we remember what it is a duplicate of. Note that
5437 pipe, file, and autoreply de-duplication is handled during routing, so we must
5438 leave such "addresses" alone here, as otherwise they will incorrectly be
5441 Argument: address of list anchor
5446 do_duplicate_check(address_item **anchor)
5449 while ((addr = *anchor))
5452 if (testflag(addr, af_pfr))
5454 anchor = &(addr->next);
5456 else if ((tnode = tree_search(tree_duplicates, addr->unique)))
5458 DEBUG(D_deliver|D_route)
5459 debug_printf("%s is a duplicate address: discarded\n", addr->unique);
5460 *anchor = addr->next;
5461 addr->dupof = tnode->data.ptr;
5462 addr->next = addr_duplicate;
5463 addr_duplicate = addr;
5467 tree_add_duplicate(addr->unique, addr);
5468 anchor = &(addr->next);
5476 /*************************************************
5477 * Deliver one message *
5478 *************************************************/
5480 /* This is the function which is called when a message is to be delivered. It
5481 is passed the id of the message. It is possible that the message no longer
5482 exists, if some other process has delivered it, and it is also possible that
5483 the message is being worked on by another process, in which case the data file
5486 If no delivery is attempted for any of the above reasons, the function returns
5487 DELIVER_NOT_ATTEMPTED.
5489 If the give_up flag is set true, do not attempt any deliveries, but instead
5490 fail all outstanding addresses and return the message to the sender (or
5493 A delivery operation has a process all to itself; we never deliver more than
5494 one message in the same process. Therefore we needn't worry too much about
5497 Liable to be called as root.
5500 id the id of the message to be delivered
5501 forced TRUE if delivery was forced by an administrator; this overrides
5502 retry delays and causes a delivery to be tried regardless
5503 give_up TRUE if an administrator has requested that delivery attempts
5506 Returns: When the global variable mua_wrapper is FALSE:
5507 DELIVER_ATTEMPTED_NORMAL if a delivery attempt was made
5508 DELIVER_NOT_ATTEMPTED otherwise (see comment above)
5509 When the global variable mua_wrapper is TRUE:
5510 DELIVER_MUA_SUCCEEDED if delivery succeeded
5511 DELIVER_MUA_FAILED if delivery failed
5512 DELIVER_NOT_ATTEMPTED if not attempted (should not occur)
5516 deliver_message(uschar *id, BOOL forced, BOOL give_up)
5519 int final_yield = DELIVER_ATTEMPTED_NORMAL;
5520 time_t now = time(NULL);
5521 address_item *addr_last = NULL;
5522 uschar *filter_message = NULL;
5523 int process_recipients = RECIP_ACCEPT;
5526 extern int acl_where;
5528 uschar *info = queue_run_pid == (pid_t)0
5529 ? string_sprintf("delivering %s", id)
5530 : string_sprintf("delivering %s (queue run pid %d)", id, queue_run_pid);
5532 /* If the D_process_info bit is on, set_process_info() will output debugging
5533 information. If not, we want to show this initial information if D_deliver or
5534 D_queue_run is set or in verbose mode. */
5536 set_process_info("%s", info);
5538 if ( !(debug_selector & D_process_info)
5539 && (debug_selector & (D_deliver|D_queue_run|D_v))
5541 debug_printf("%s\n", info);
5543 /* Ensure that we catch any subprocesses that are created. Although Exim
5544 sets SIG_DFL as its initial default, some routes through the code end up
5545 here with it set to SIG_IGN - cases where a non-synchronous delivery process
5546 has been forked, but no re-exec has been done. We use sigaction rather than
5547 plain signal() on those OS where SA_NOCLDWAIT exists, because we want to be
5548 sure it is turned off. (There was a problem on AIX with this.) */
5552 struct sigaction act;
5553 act.sa_handler = SIG_DFL;
5554 sigemptyset(&(act.sa_mask));
5556 sigaction(SIGCHLD, &act, NULL);
5559 signal(SIGCHLD, SIG_DFL);
5562 /* Make the forcing flag available for routers and transports, set up the
5563 global message id field, and initialize the count for returned files and the
5564 message size. This use of strcpy() is OK because the length id is checked when
5565 it is obtained from a command line (the -M or -q options), and otherwise it is
5566 known to be a valid message id. */
5568 Ustrcpy(message_id, id);
5569 deliver_force = forced;
5573 /* Initialize some flags */
5575 update_spool = FALSE;
5576 remove_journal = TRUE;
5578 /* Set a known context for any ACLs we call via expansions */
5579 acl_where = ACL_WHERE_DELIVERY;
5581 /* Reset the random number generator, so that if several delivery processes are
5582 started from a queue runner that has already used random numbers (for sorting),
5583 they don't all get the same sequence. */
5587 /* Open and lock the message's data file. Exim locks on this one because the
5588 header file may get replaced as it is re-written during the delivery process.
5589 Any failures cause messages to be written to the log, except for missing files
5590 while queue running - another process probably completed delivery. As part of
5591 opening the data file, message_subdir gets set. */
5593 if ((deliver_datafile = spool_open_datafile(id)) < 0)
5594 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5596 /* The value of message_size at this point has been set to the data length,
5597 plus one for the blank line that notionally precedes the data. */
5599 /* Now read the contents of the header file, which will set up the headers in
5600 store, and also the list of recipients and the tree of non-recipients and
5601 assorted flags. It updates message_size. If there is a reading or format error,
5602 give up; if the message has been around for sufficiently long, remove it. */
5605 uschar * spoolname = string_sprintf("%s-H", id);
5606 if ((rc = spool_read_header(spoolname, TRUE, TRUE)) != spool_read_OK)
5608 if (errno == ERRNO_SPOOLFORMAT)
5610 struct stat statbuf;
5611 if (Ustat(spool_fname(US"input", message_subdir, spoolname, US""),
5613 log_write(0, LOG_MAIN, "Format error in spool file %s: "
5614 "size=" OFF_T_FMT, spoolname, statbuf.st_size);
5616 log_write(0, LOG_MAIN, "Format error in spool file %s", spoolname);
5619 log_write(0, LOG_MAIN, "Error reading spool file %s: %s", spoolname,
5622 /* If we managed to read the envelope data, received_time contains the
5623 time the message was received. Otherwise, we can calculate it from the
5626 if (rc != spool_read_hdrerror)
5628 received_time.tv_sec = received_time.tv_usec = 0;
5629 /*XXX subsec precision?*/
5630 for (i = 0; i < 6; i++)
5631 received_time.tv_sec = received_time.tv_sec * BASE_62 + tab62[id[i] - '0'];
5634 /* If we've had this malformed message too long, sling it. */
5636 if (now - received_time.tv_sec > keep_malformed)
5638 Uunlink(spool_fname(US"msglog", message_subdir, id, US""));
5639 Uunlink(spool_fname(US"input", message_subdir, id, US"-D"));
5640 Uunlink(spool_fname(US"input", message_subdir, id, US"-H"));
5641 Uunlink(spool_fname(US"input", message_subdir, id, US"-J"));
5642 log_write(0, LOG_MAIN, "Message removed because older than %s",
5643 readconf_printtime(keep_malformed));
5646 (void)close(deliver_datafile);
5647 deliver_datafile = -1;
5648 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5652 /* The spool header file has been read. Look to see if there is an existing
5653 journal file for this message. If there is, it means that a previous delivery
5654 attempt crashed (program or host) before it could update the spool header file.
5655 Read the list of delivered addresses from the journal and add them to the
5656 nonrecipients tree. Then update the spool file. We can leave the journal in
5657 existence, as it will get further successful deliveries added to it in this
5658 run, and it will be deleted if this function gets to its end successfully.
5659 Otherwise it might be needed again. */
5662 uschar * fname = spool_fname(US"input", message_subdir, id, US"-J");
5665 if ( (journal_fd = Uopen(fname, O_RDWR|O_APPEND
5673 && lseek(journal_fd, 0, SEEK_SET) == 0
5674 && (jread = fdopen(journal_fd, "rb"))
5677 while (Ufgets(big_buffer, big_buffer_size, jread))
5679 int n = Ustrlen(big_buffer);
5680 big_buffer[n-1] = 0;
5681 tree_add_nonrecipient(big_buffer);
5682 DEBUG(D_deliver) debug_printf("Previously delivered address %s taken from "
5683 "journal file\n", big_buffer);
5686 if ((journal_fd = dup(fileno(jread))) < 0)
5687 journal_fd = fileno(jread);
5689 (void) fclose(jread); /* Try to not leak the FILE resource */
5691 /* Panic-dies on error */
5692 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
5694 else if (errno != ENOENT)
5696 log_write(0, LOG_MAIN|LOG_PANIC, "attempt to open journal for reading gave: "
5697 "%s", strerror(errno));
5698 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5701 /* A null recipients list indicates some kind of disaster. */
5703 if (!recipients_list)
5705 (void)close(deliver_datafile);
5706 deliver_datafile = -1;
5707 log_write(0, LOG_MAIN, "Spool error: no recipients for %s", fname);
5708 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5713 /* Handle a message that is frozen. There are a number of different things that
5714 can happen, but in the default situation, unless forced, no delivery is
5719 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
5720 /* Moving to another directory removes the message from Exim's view. Other
5721 tools must be used to deal with it. Logging of this action happens in
5722 spool_move_message() and its subfunctions. */
5724 if ( move_frozen_messages
5725 && spool_move_message(id, message_subdir, US"", US"F")
5727 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5730 /* For all frozen messages (bounces or not), timeout_frozen_after sets the
5731 maximum time to keep messages that are frozen. Thaw if we reach it, with a
5732 flag causing all recipients to be failed. The time is the age of the
5733 message, not the time since freezing. */
5735 if (timeout_frozen_after > 0 && message_age >= timeout_frozen_after)
5737 log_write(0, LOG_MAIN, "cancelled by timeout_frozen_after");
5738 process_recipients = RECIP_FAIL_TIMEOUT;
5741 /* For bounce messages (and others with no sender), thaw if the error message
5742 ignore timer is exceeded. The message will be discarded if this delivery
5745 else if (!*sender_address && message_age >= ignore_bounce_errors_after)
5746 log_write(0, LOG_MAIN, "Unfrozen by errmsg timer");
5748 /* If this is a bounce message, or there's no auto thaw, or we haven't
5749 reached the auto thaw time yet, and this delivery is not forced by an admin
5750 user, do not attempt delivery of this message. Note that forced is set for
5751 continuing messages down the same channel, in order to skip load checking and
5752 ignore hold domains, but we don't want unfreezing in that case. */
5756 if ( ( sender_address[0] == 0
5758 || now <= deliver_frozen_at + auto_thaw
5760 && ( !forced || !deliver_force_thaw
5761 || !admin_user || continue_hostname
5764 (void)close(deliver_datafile);
5765 deliver_datafile = -1;
5766 log_write(L_skip_delivery, LOG_MAIN, "Message is frozen");
5767 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5770 /* If delivery was forced (by an admin user), assume a manual thaw.
5771 Otherwise it's an auto thaw. */
5775 deliver_manual_thaw = TRUE;
5776 log_write(0, LOG_MAIN, "Unfrozen by forced delivery");
5778 else log_write(0, LOG_MAIN, "Unfrozen by auto-thaw");
5781 /* We get here if any of the rules for unfreezing have triggered. */
5783 deliver_freeze = FALSE;
5784 update_spool = TRUE;
5788 /* Open the message log file if we are using them. This records details of
5789 deliveries, deferments, and failures for the benefit of the mail administrator.
5790 The log is not used by exim itself to track the progress of a message; that is
5791 done by rewriting the header spool file. */
5795 uschar * fname = spool_fname(US"msglog", message_subdir, id, US"");
5799 if ((fd = open_msglog_file(fname, SPOOL_MODE, &error)) < 0)
5801 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't %s message log %s: %s", error,
5802 fname, strerror(errno));
5803 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5806 /* Make a C stream out of it. */
5808 if (!(message_log = fdopen(fd, "a")))
5810 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't fdopen message log %s: %s",
5811 fname, strerror(errno));
5812 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5817 /* If asked to give up on a message, log who did it, and set the action for all
5822 struct passwd *pw = getpwuid(real_uid);
5823 log_write(0, LOG_MAIN, "cancelled by %s",
5824 pw ? US pw->pw_name : string_sprintf("uid %ld", (long int)real_uid));
5825 process_recipients = RECIP_FAIL;
5828 /* Otherwise, if there are too many Received: headers, fail all recipients. */
5830 else if (received_count > received_headers_max)
5831 process_recipients = RECIP_FAIL_LOOP;
5833 /* Otherwise, if a system-wide, address-independent message filter is
5834 specified, run it now, except in the case when we are failing all recipients as
5835 a result of timeout_frozen_after. If the system filter yields "delivered", then
5836 ignore the true recipients of the message. Failure of the filter file is
5837 logged, and the delivery attempt fails. */
5839 else if (system_filter && process_recipients != RECIP_FAIL_TIMEOUT)
5844 redirect_block redirect;
5846 if (system_filter_uid_set)
5848 ugid.uid = system_filter_uid;
5849 ugid.gid = system_filter_gid;
5850 ugid.uid_set = ugid.gid_set = TRUE;
5854 ugid.uid_set = ugid.gid_set = FALSE;
5857 return_path = sender_address;
5858 enable_dollar_recipients = TRUE; /* Permit $recipients in system filter */
5859 system_filtering = TRUE;
5861 /* Any error in the filter file causes a delivery to be abandoned. */
5863 redirect.string = system_filter;
5864 redirect.isfile = TRUE;
5865 redirect.check_owner = redirect.check_group = FALSE;
5866 redirect.owners = NULL;
5867 redirect.owngroups = NULL;
5869 redirect.modemask = 0;
5871 DEBUG(D_deliver|D_filter) debug_printf("running system filter\n");
5874 &redirect, /* Where the data is */
5875 RDO_DEFER | /* Turn on all the enabling options */
5876 RDO_FAIL | /* Leave off all the disabling options */
5881 NULL, /* No :include: restriction (not used in filter) */
5882 NULL, /* No sieve vacation directory (not sieve!) */
5883 NULL, /* No sieve enotify mailto owner (not sieve!) */
5884 NULL, /* No sieve user address (not sieve!) */
5885 NULL, /* No sieve subaddress (not sieve!) */
5886 &ugid, /* uid/gid data */
5887 &addr_new, /* Where to hang generated addresses */
5888 &filter_message, /* Where to put error message */
5889 NULL, /* Don't skip syntax errors */
5890 &filtertype, /* Will always be set to FILTER_EXIM for this call */
5891 US"system filter"); /* For error messages */
5893 DEBUG(D_deliver|D_filter) debug_printf("system filter returned %d\n", rc);
5895 if (rc == FF_ERROR || rc == FF_NONEXIST)
5897 (void)close(deliver_datafile);
5898 deliver_datafile = -1;
5899 log_write(0, LOG_MAIN|LOG_PANIC, "Error in system filter: %s",
5900 string_printing(filter_message));
5901 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5904 /* Reset things. If the filter message is an empty string, which can happen
5905 for a filter "fail" or "freeze" command with no text, reset it to NULL. */
5907 system_filtering = FALSE;
5908 enable_dollar_recipients = FALSE;
5909 if (filter_message && filter_message[0] == 0) filter_message = NULL;
5911 /* Save the values of the system filter variables so that user filters
5914 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5916 /* The filter can request that delivery of the original addresses be
5921 process_recipients = RECIP_DEFER;
5922 deliver_msglog("Delivery deferred by system filter\n");
5923 log_write(0, LOG_MAIN, "Delivery deferred by system filter");
5926 /* The filter can request that a message be frozen, but this does not
5927 take place if the message has been manually thawed. In that case, we must
5928 unset "delivered", which is forced by the "freeze" command to make -bF
5931 else if (rc == FF_FREEZE && !deliver_manual_thaw)
5933 deliver_freeze = TRUE;
5934 deliver_frozen_at = time(NULL);
5935 process_recipients = RECIP_DEFER;
5936 frozen_info = string_sprintf(" by the system filter%s%s",
5937 filter_message ? US": " : US"",
5938 filter_message ? filter_message : US"");
5941 /* The filter can request that a message be failed. The error message may be
5942 quite long - it is sent back to the sender in the bounce - but we don't want
5943 to fill up the log with repetitions of it. If it starts with << then the text
5944 between << and >> is written to the log, with the rest left for the bounce
5947 else if (rc == FF_FAIL)
5949 uschar *colon = US"";
5950 uschar *logmsg = US"";
5953 process_recipients = RECIP_FAIL_FILTER;
5959 if ( filter_message[0] == '<'
5960 && filter_message[1] == '<'
5961 && (logend = Ustrstr(filter_message, ">>"))
5964 logmsg = filter_message + 2;
5965 loglen = logend - logmsg;
5966 filter_message = logend + 2;
5967 if (filter_message[0] == 0) filter_message = NULL;
5971 logmsg = filter_message;
5972 loglen = Ustrlen(filter_message);
5976 log_write(0, LOG_MAIN, "cancelled by system filter%s%.*s", colon, loglen,
5980 /* Delivery can be restricted only to those recipients (if any) that the
5981 filter specified. */
5983 else if (rc == FF_DELIVERED)
5985 process_recipients = RECIP_IGNORE;
5987 log_write(0, LOG_MAIN, "original recipients ignored (system filter)");
5989 log_write(0, LOG_MAIN, "=> discarded (system filter)");
5992 /* If any new addresses were created by the filter, fake up a "parent"
5993 for them. This is necessary for pipes, etc., which are expected to have
5994 parents, and it also gives some sensible logging for others. Allow
5995 pipes, files, and autoreplies, and run them as the filter uid if set,
5996 otherwise as the current uid. */
6000 int uid = (system_filter_uid_set)? system_filter_uid : geteuid();
6001 int gid = (system_filter_gid_set)? system_filter_gid : getegid();
6003 /* The text "system-filter" is tested in transport_set_up_command() and in
6004 set_up_shell_command() in the pipe transport, to enable them to permit
6005 $recipients, so don't change it here without also changing it there. */
6007 address_item *p = addr_new;
6008 address_item *parent = deliver_make_addr(US"system-filter", FALSE);
6010 parent->domain = string_copylc(qualify_domain_recipient);
6011 parent->local_part = US"system-filter";
6013 /* As part of this loop, we arrange for addr_last to end up pointing
6014 at the final address. This is used if we go on to add addresses for the
6015 original recipients. */
6019 if (parent->child_count == USHRT_MAX)
6020 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "system filter generated more "
6021 "than %d delivery addresses", USHRT_MAX);
6022 parent->child_count++;
6025 if (testflag(p, af_pfr))
6031 setflag(p, af_uid_set);
6032 setflag(p, af_gid_set);
6033 setflag(p, af_allow_file);
6034 setflag(p, af_allow_pipe);
6035 setflag(p, af_allow_reply);
6037 /* Find the name of the system filter's appropriate pfr transport */
6039 if (p->address[0] == '|')
6042 tpname = system_filter_pipe_transport;
6043 address_pipe = p->address;
6045 else if (p->address[0] == '>')
6048 tpname = system_filter_reply_transport;
6052 if (p->address[Ustrlen(p->address)-1] == '/')
6054 type = US"directory";
6055 tpname = system_filter_directory_transport;
6060 tpname = system_filter_file_transport;
6062 address_file = p->address;
6065 /* Now find the actual transport, first expanding the name. We have
6066 set address_file or address_pipe above. */
6070 uschar *tmp = expand_string(tpname);
6071 address_file = address_pipe = NULL;
6073 p->message = string_sprintf("failed to expand \"%s\" as a "
6074 "system filter transport name", tpname);
6078 p->message = string_sprintf("system_filter_%s_transport is unset",
6083 transport_instance *tp;
6084 for (tp = transports; tp; tp = tp->next)
6085 if (Ustrcmp(tp->name, tpname) == 0)
6091 p->message = string_sprintf("failed to find \"%s\" transport "
6092 "for system filter delivery", tpname);
6095 /* If we couldn't set up a transport, defer the delivery, putting the
6096 error on the panic log as well as the main log. */
6100 address_item *badp = p;
6102 if (!addr_last) addr_new = p; else addr_last->next = p;
6103 badp->local_part = badp->address; /* Needed for log line */
6104 post_process_one(badp, DEFER, LOG_MAIN|LOG_PANIC, DTYPE_ROUTER, 0);
6107 } /* End of pfr handling */
6109 /* Either a non-pfr delivery, or we found a transport */
6111 DEBUG(D_deliver|D_filter)
6112 debug_printf("system filter added %s\n", p->address);
6116 } /* Loop through all addr_new addresses */
6121 /* Scan the recipients list, and for every one that is not in the non-
6122 recipients tree, add an addr item to the chain of new addresses. If the pno
6123 value is non-negative, we must set the onetime parent from it. This which
6124 points to the relevant entry in the recipients list.
6126 This processing can be altered by the setting of the process_recipients
6127 variable, which is changed if recipients are to be ignored, failed, or
6128 deferred. This can happen as a result of system filter activity, or if the -Mg
6129 option is used to fail all of them.
6131 Duplicate addresses are handled later by a different tree structure; we can't
6132 just extend the non-recipients tree, because that will be re-written to the
6133 spool if the message is deferred, and in any case there are casing
6134 complications for local addresses. */
6136 if (process_recipients != RECIP_IGNORE)
6137 for (i = 0; i < recipients_count; i++)
6138 if (!tree_search(tree_nonrecipients, recipients_list[i].address))
6140 recipient_item *r = recipients_list + i;
6141 address_item *new = deliver_make_addr(r->address, FALSE);
6142 new->prop.errors_address = r->errors_to;
6144 if ((new->prop.utf8_msg = message_smtputf8))
6146 new->prop.utf8_downcvt = message_utf8_downconvert == 1;
6147 new->prop.utf8_downcvt_maybe = message_utf8_downconvert == -1;
6148 DEBUG(D_deliver) debug_printf("utf8, downconvert %s\n",
6149 new->prop.utf8_downcvt ? "yes"
6150 : new->prop.utf8_downcvt_maybe ? "ifneeded"
6156 new->onetime_parent = recipients_list[r->pno].address;
6158 /* If DSN support is enabled, set the dsn flags and the original receipt
6159 to be passed on to other DSN enabled MTAs */
6160 new->dsn_flags = r->dsn_flags & rf_dsnflags;
6161 new->dsn_orcpt = r->orcpt;
6162 DEBUG(D_deliver) debug_printf("DSN: set orcpt: %s flags: %d\n",
6163 new->dsn_orcpt, new->dsn_flags);
6165 switch (process_recipients)
6167 /* RECIP_DEFER is set when a system filter freezes a message. */
6170 new->next = addr_defer;
6175 /* RECIP_FAIL_FILTER is set when a system filter has obeyed a "fail"
6178 case RECIP_FAIL_FILTER:
6180 filter_message ? filter_message : US"delivery cancelled";
6181 setflag(new, af_pass_message);
6182 goto RECIP_QUEUE_FAILED; /* below */
6185 /* RECIP_FAIL_TIMEOUT is set when a message is frozen, but is older
6186 than the value in timeout_frozen_after. Treat non-bounce messages
6187 similarly to -Mg; for bounce messages we just want to discard, so
6188 don't put the address on the failed list. The timeout has already
6191 case RECIP_FAIL_TIMEOUT:
6192 new->message = US"delivery cancelled; message timed out";
6193 goto RECIP_QUEUE_FAILED; /* below */
6196 /* RECIP_FAIL is set when -Mg has been used. */
6199 new->message = US"delivery cancelled by administrator";
6202 /* Common code for the failure cases above. If this is not a bounce
6203 message, put the address on the failed list so that it is used to
6204 create a bounce. Otherwise do nothing - this just discards the address.
6205 The incident has already been logged. */
6208 if (sender_address[0] != 0)
6210 new->next = addr_failed;
6216 /* RECIP_FAIL_LOOP is set when there are too many Received: headers
6217 in the message. Process each address as a routing failure; if this
6218 is a bounce message, it will get frozen. */
6220 case RECIP_FAIL_LOOP:
6221 new->message = US"Too many \"Received\" headers - suspected mail loop";
6222 post_process_one(new, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
6226 /* Value should be RECIP_ACCEPT; take this as the safe default. */
6229 if (!addr_new) addr_new = new; else addr_last->next = new;
6234 #ifndef DISABLE_EVENT
6235 if (process_recipients != RECIP_ACCEPT)
6237 uschar * save_local = deliver_localpart;
6238 const uschar * save_domain = deliver_domain;
6240 deliver_localpart = expand_string(
6241 string_sprintf("${local_part:%s}", new->address));
6242 deliver_domain = expand_string(
6243 string_sprintf("${domain:%s}", new->address));
6245 (void) event_raise(event_action,
6246 US"msg:fail:internal", new->message);
6248 deliver_localpart = save_local;
6249 deliver_domain = save_domain;
6257 debug_printf("Delivery address list:\n");
6258 for (p = addr_new; p; p = p->next)
6259 debug_printf(" %s %s\n", p->address,
6260 p->onetime_parent ? p->onetime_parent : US"");
6263 /* Set up the buffers used for copying over the file when delivering. */
6265 deliver_in_buffer = store_malloc(DELIVER_IN_BUFFER_SIZE);
6266 deliver_out_buffer = store_malloc(DELIVER_OUT_BUFFER_SIZE);
6270 /* Until there are no more new addresses, handle each one as follows:
6272 . If this is a generated address (indicated by the presence of a parent
6273 pointer) then check to see whether it is a pipe, file, or autoreply, and
6274 if so, handle it directly here. The router that produced the address will
6275 have set the allow flags into the address, and also set the uid/gid required.
6276 Having the routers generate new addresses and then checking them here at
6277 the outer level is tidier than making each router do the checking, and
6278 means that routers don't need access to the failed address queue.
6280 . Break up the address into local part and domain, and make lowercased
6281 versions of these strings. We also make unquoted versions of the local part.
6283 . Handle the percent hack for those domains for which it is valid.
6285 . For child addresses, determine if any of the parents have the same address.
6286 If so, generate a different string for previous delivery checking. Without
6287 this code, if the address spqr generates spqr via a forward or alias file,
6288 delivery of the generated spqr stops further attempts at the top level spqr,
6289 which is not what is wanted - it may have generated other addresses.
6291 . Check on the retry database to see if routing was previously deferred, but
6292 only if in a queue run. Addresses that are to be routed are put on the
6293 addr_route chain. Addresses that are to be deferred are put on the
6294 addr_defer chain. We do all the checking first, so as not to keep the
6295 retry database open any longer than necessary.
6297 . Now we run the addresses through the routers. A router may put the address
6298 on either the addr_local or the addr_remote chain for local or remote
6299 delivery, respectively, or put it on the addr_failed chain if it is
6300 undeliveable, or it may generate child addresses and put them on the
6301 addr_new chain, or it may defer an address. All the chain anchors are
6302 passed as arguments so that the routers can be called for verification
6305 . If new addresses have been generated by the routers, da capo.
6308 header_rewritten = FALSE; /* No headers rewritten yet */
6309 while (addr_new) /* Loop until all addresses dealt with */
6311 address_item *addr, *parent;
6313 /* Failure to open the retry database is treated the same as if it does
6314 not exist. In both cases, dbm_file is NULL. */
6316 if (!(dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE)))
6317 DEBUG(D_deliver|D_retry|D_route|D_hints_lookup)
6318 debug_printf("no retry data available\n");
6320 /* Scan the current batch of new addresses, to handle pipes, files and
6321 autoreplies, and determine which others are ready for routing. */
6328 dbdata_retry *domain_retry_record;
6329 dbdata_retry *address_retry_record;
6332 addr_new = addr->next;
6334 DEBUG(D_deliver|D_retry|D_route)
6336 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
6337 debug_printf("Considering: %s\n", addr->address);
6340 /* Handle generated address that is a pipe or a file or an autoreply. */
6342 if (testflag(addr, af_pfr))
6344 /* If an autoreply in a filter could not generate a syntactically valid
6345 address, give up forthwith. Set af_ignore_error so that we don't try to
6346 generate a bounce. */
6348 if (testflag(addr, af_bad_reply))
6350 addr->basic_errno = ERRNO_BADADDRESS2;
6351 addr->local_part = addr->address;
6353 US"filter autoreply generated syntactically invalid recipient";
6354 addr->prop.ignore_error = TRUE;
6355 (void) post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
6356 continue; /* with the next new address */
6359 /* If two different users specify delivery to the same pipe or file or
6360 autoreply, there should be two different deliveries, so build a unique
6361 string that incorporates the original address, and use this for
6362 duplicate testing and recording delivery, and also for retrying. */
6365 string_sprintf("%s:%s", addr->address, addr->parent->unique +
6366 (testflag(addr->parent, af_homonym)? 3:0));
6368 addr->address_retry_key = addr->domain_retry_key =
6369 string_sprintf("T:%s", addr->unique);
6371 /* If a filter file specifies two deliveries to the same pipe or file,
6372 we want to de-duplicate, but this is probably not wanted for two mail
6373 commands to the same address, where probably both should be delivered.
6374 So, we have to invent a different unique string in that case. Just
6375 keep piling '>' characters on the front. */
6377 if (addr->address[0] == '>')
6379 while (tree_search(tree_duplicates, addr->unique))
6380 addr->unique = string_sprintf(">%s", addr->unique);
6383 else if ((tnode = tree_search(tree_duplicates, addr->unique)))
6385 DEBUG(D_deliver|D_route)
6386 debug_printf("%s is a duplicate address: discarded\n", addr->address);
6387 addr->dupof = tnode->data.ptr;
6388 addr->next = addr_duplicate;
6389 addr_duplicate = addr;
6393 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
6395 /* Check for previous delivery */
6397 if (tree_search(tree_nonrecipients, addr->unique))
6399 DEBUG(D_deliver|D_route)
6400 debug_printf("%s was previously delivered: discarded\n", addr->address);
6401 child_done(addr, tod_stamp(tod_log));
6405 /* Save for checking future duplicates */
6407 tree_add_duplicate(addr->unique, addr);
6409 /* Set local part and domain */
6411 addr->local_part = addr->address;
6412 addr->domain = addr->parent->domain;
6414 /* Ensure that the delivery is permitted. */
6416 if (testflag(addr, af_file))
6418 if (!testflag(addr, af_allow_file))
6420 addr->basic_errno = ERRNO_FORBIDFILE;
6421 addr->message = US"delivery to file forbidden";
6422 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
6423 continue; /* with the next new address */
6426 else if (addr->address[0] == '|')
6428 if (!testflag(addr, af_allow_pipe))
6430 addr->basic_errno = ERRNO_FORBIDPIPE;
6431 addr->message = US"delivery to pipe forbidden";
6432 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
6433 continue; /* with the next new address */
6436 else if (!testflag(addr, af_allow_reply))
6438 addr->basic_errno = ERRNO_FORBIDREPLY;
6439 addr->message = US"autoreply forbidden";
6440 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
6441 continue; /* with the next new address */
6444 /* If the errno field is already set to BADTRANSPORT, it indicates
6445 failure to expand a transport string, or find the associated transport,
6446 or an unset transport when one is required. Leave this test till now so
6447 that the forbid errors are given in preference. */
6449 if (addr->basic_errno == ERRNO_BADTRANSPORT)
6451 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6455 /* Treat /dev/null as a special case and abandon the delivery. This
6456 avoids having to specify a uid on the transport just for this case.
6457 Arrange for the transport name to be logged as "**bypassed**". */
6459 if (Ustrcmp(addr->address, "/dev/null") == 0)
6461 uschar *save = addr->transport->name;
6462 addr->transport->name = US"**bypassed**";
6463 (void)post_process_one(addr, OK, LOG_MAIN, DTYPE_TRANSPORT, '=');
6464 addr->transport->name = save;
6465 continue; /* with the next new address */
6468 /* Pipe, file, or autoreply delivery is to go ahead as a normal local
6471 DEBUG(D_deliver|D_route)
6472 debug_printf("queued for %s transport\n", addr->transport->name);
6473 addr->next = addr_local;
6475 continue; /* with the next new address */
6478 /* Handle normal addresses. First, split up into local part and domain,
6479 handling the %-hack if necessary. There is the possibility of a defer from
6480 a lookup in percent_hack_domains. */
6482 if ((rc = deliver_split_address(addr)) == DEFER)
6484 addr->message = US"cannot check percent_hack_domains";
6485 addr->basic_errno = ERRNO_LISTDEFER;
6486 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_NONE, 0);
6490 /* Check to see if the domain is held. If so, proceed only if the
6491 delivery was forced by hand. */
6493 deliver_domain = addr->domain; /* set $domain */
6494 if ( !forced && hold_domains
6495 && (rc = match_isinlist(addr->domain, (const uschar **)&hold_domains, 0,
6496 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE,
6502 addr->message = US"hold_domains lookup deferred";
6503 addr->basic_errno = ERRNO_LISTDEFER;
6507 addr->message = US"domain is held";
6508 addr->basic_errno = ERRNO_HELD;
6510 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_NONE, 0);
6514 /* Now we can check for duplicates and previously delivered addresses. In
6515 order to do this, we have to generate a "unique" value for each address,
6516 because there may be identical actual addresses in a line of descendents.
6517 The "unique" field is initialized to the same value as the "address" field,
6518 but gets changed here to cope with identically-named descendents. */
6520 for (parent = addr->parent; parent; parent = parent->parent)
6521 if (strcmpic(addr->address, parent->address) == 0) break;
6523 /* If there's an ancestor with the same name, set the homonym flag. This
6524 influences how deliveries are recorded. Then add a prefix on the front of
6525 the unique address. We use \n\ where n starts at 0 and increases each time.
6526 It is unlikely to pass 9, but if it does, it may look odd but will still
6527 work. This means that siblings or cousins with the same names are treated
6528 as duplicates, which is what we want. */
6532 setflag(addr, af_homonym);
6533 if (parent->unique[0] != '\\')
6534 addr->unique = string_sprintf("\\0\\%s", addr->address);
6536 addr->unique = string_sprintf("\\%c\\%s", parent->unique[1] + 1,
6540 /* Ensure that the domain in the unique field is lower cased, because
6541 domains are always handled caselessly. */
6543 p = Ustrrchr(addr->unique, '@');
6544 while (*p != 0) { *p = tolower(*p); p++; }
6546 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
6548 if (tree_search(tree_nonrecipients, addr->unique))
6550 DEBUG(D_deliver|D_route)
6551 debug_printf("%s was previously delivered: discarded\n", addr->unique);
6552 child_done(addr, tod_stamp(tod_log));
6556 /* Get the routing retry status, saving the two retry keys (with and
6557 without the local part) for subsequent use. If there is no retry record for
6558 the standard address routing retry key, we look for the same key with the
6559 sender attached, because this form is used by the smtp transport after a
6560 4xx response to RCPT when address_retry_include_sender is true. */
6562 addr->domain_retry_key = string_sprintf("R:%s", addr->domain);
6563 addr->address_retry_key = string_sprintf("R:%s@%s", addr->local_part,
6568 domain_retry_record = dbfn_read(dbm_file, addr->domain_retry_key);
6569 if ( domain_retry_record
6570 && now - domain_retry_record->time_stamp > retry_data_expire
6572 domain_retry_record = NULL; /* Ignore if too old */
6574 address_retry_record = dbfn_read(dbm_file, addr->address_retry_key);
6575 if ( address_retry_record
6576 && now - address_retry_record->time_stamp > retry_data_expire
6578 address_retry_record = NULL; /* Ignore if too old */
6580 if (!address_retry_record)
6582 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
6584 address_retry_record = dbfn_read(dbm_file, altkey);
6585 if ( address_retry_record
6586 && now - address_retry_record->time_stamp > retry_data_expire)
6587 address_retry_record = NULL; /* Ignore if too old */
6591 domain_retry_record = address_retry_record = NULL;
6593 DEBUG(D_deliver|D_retry)
6595 if (!domain_retry_record)
6596 debug_printf("no domain retry record\n");
6597 if (!address_retry_record)
6598 debug_printf("no address retry record\n");
6601 /* If we are sending a message down an existing SMTP connection, we must
6602 assume that the message which created the connection managed to route
6603 an address to that connection. We do not want to run the risk of taking
6604 a long time over routing here, because if we do, the server at the other
6605 end of the connection may time it out. This is especially true for messages
6606 with lots of addresses. For this kind of delivery, queue_running is not
6607 set, so we would normally route all addresses. We take a pragmatic approach
6608 and defer routing any addresses that have any kind of domain retry record.
6609 That is, we don't even look at their retry times. It doesn't matter if this
6610 doesn't work occasionally. This is all just an optimization, after all.
6612 The reason for not doing the same for address retries is that they normally
6613 arise from 4xx responses, not DNS timeouts. */
6615 if (continue_hostname && domain_retry_record)
6617 addr->message = US"reusing SMTP connection skips previous routing defer";
6618 addr->basic_errno = ERRNO_RRETRY;
6619 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6622 /* If we are in a queue run, defer routing unless there is no retry data or
6623 we've passed the next retry time, or this message is forced. In other
6624 words, ignore retry data when not in a queue run.
6626 However, if the domain retry time has expired, always allow the routing
6627 attempt. If it fails again, the address will be failed. This ensures that
6628 each address is routed at least once, even after long-term routing
6631 If there is an address retry, check that too; just wait for the next
6632 retry time. This helps with the case when the temporary error on the
6633 address was really message-specific rather than address specific, since
6634 it allows other messages through.
6636 We also wait for the next retry time if this is a message sent down an
6637 existing SMTP connection (even though that will be forced). Otherwise there
6638 will be far too many attempts for an address that gets a 4xx error. In
6639 fact, after such an error, we should not get here because, the host should
6640 not be remembered as one this message needs. However, there was a bug that
6641 used to cause this to happen, so it is best to be on the safe side.
6643 Even if we haven't reached the retry time in the hints, there is one more
6644 check to do, which is for the ultimate address timeout. We only do this
6645 check if there is an address retry record and there is not a domain retry
6646 record; this implies that previous attempts to handle the address had the
6647 retry_use_local_parts option turned on. We use this as an approximation
6648 for the destination being like a local delivery, for example delivery over
6649 LMTP to an IMAP message store. In this situation users are liable to bump
6650 into their quota and thereby have intermittently successful deliveries,
6651 which keep the retry record fresh, which can lead to us perpetually
6652 deferring messages. */
6654 else if ( ( queue_running && !deliver_force
6655 || continue_hostname
6657 && ( ( domain_retry_record
6658 && now < domain_retry_record->next_try
6659 && !domain_retry_record->expired
6661 || ( address_retry_record
6662 && now < address_retry_record->next_try
6664 && ( domain_retry_record
6665 || !address_retry_record
6666 || !retry_ultimate_address_timeout(addr->address_retry_key,
6667 addr->domain, address_retry_record, now)
6670 addr->message = US"retry time not reached";
6671 addr->basic_errno = ERRNO_RRETRY;
6672 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6675 /* The domain is OK for routing. Remember if retry data exists so it
6676 can be cleaned up after a successful delivery. */
6680 if (domain_retry_record || address_retry_record)
6681 setflag(addr, af_dr_retry_exists);
6682 addr->next = addr_route;
6684 DEBUG(D_deliver|D_route)
6685 debug_printf("%s: queued for routing\n", addr->address);
6689 /* The database is closed while routing is actually happening. Requests to
6690 update it are put on a chain and all processed together at the end. */
6692 if (dbm_file) dbfn_close(dbm_file);
6694 /* If queue_domains is set, we don't even want to try routing addresses in
6695 those domains. During queue runs, queue_domains is forced to be unset.
6696 Optimize by skipping this pass through the addresses if nothing is set. */
6698 if (!deliver_force && queue_domains)
6700 address_item *okaddr = NULL;
6703 address_item *addr = addr_route;
6704 addr_route = addr->next;
6706 deliver_domain = addr->domain; /* set $domain */
6707 if ((rc = match_isinlist(addr->domain, (const uschar **)&queue_domains, 0,
6708 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
6712 addr->basic_errno = ERRNO_LISTDEFER;
6713 addr->message = US"queue_domains lookup deferred";
6714 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6718 addr->next = okaddr;
6723 addr->basic_errno = ERRNO_QUEUE_DOMAIN;
6724 addr->message = US"domain is in queue_domains";
6725 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6729 addr_route = okaddr;
6732 /* Now route those addresses that are not deferred. */
6737 address_item *addr = addr_route;
6738 const uschar *old_domain = addr->domain;
6739 uschar *old_unique = addr->unique;
6740 addr_route = addr->next;
6743 /* Just in case some router parameter refers to it. */
6745 if (!(return_path = addr->prop.errors_address))
6746 return_path = sender_address;
6748 /* If a router defers an address, add a retry item. Whether or not to
6749 use the local part in the key is a property of the router. */
6751 if ((rc = route_address(addr, &addr_local, &addr_remote, &addr_new,
6752 &addr_succeed, v_none)) == DEFER)
6753 retry_add_item(addr,
6754 addr->router->retry_use_local_part
6755 ? string_sprintf("R:%s@%s", addr->local_part, addr->domain)
6756 : string_sprintf("R:%s", addr->domain),
6759 /* Otherwise, if there is an existing retry record in the database, add
6760 retry items to delete both forms. We must also allow for the possibility
6761 of a routing retry that includes the sender address. Since the domain might
6762 have been rewritten (expanded to fully qualified) as a result of routing,
6763 ensure that the rewritten form is also deleted. */
6765 else if (testflag(addr, af_dr_retry_exists))
6767 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
6769 retry_add_item(addr, altkey, rf_delete);
6770 retry_add_item(addr, addr->address_retry_key, rf_delete);
6771 retry_add_item(addr, addr->domain_retry_key, rf_delete);
6772 if (Ustrcmp(addr->domain, old_domain) != 0)
6773 retry_add_item(addr, string_sprintf("R:%s", old_domain), rf_delete);
6776 /* DISCARD is given for :blackhole: and "seen finish". The event has been
6777 logged, but we need to ensure the address (and maybe parents) is marked
6782 address_done(addr, tod_stamp(tod_log));
6783 continue; /* route next address */
6786 /* The address is finished with (failed or deferred). */
6790 (void)post_process_one(addr, rc, LOG_MAIN, DTYPE_ROUTER, 0);
6791 continue; /* route next address */
6794 /* The address has been routed. If the router changed the domain, it will
6795 also have changed the unique address. We have to test whether this address
6796 has already been delivered, because it's the unique address that finally
6799 if ( addr->unique != old_unique
6800 && tree_search(tree_nonrecipients, addr->unique) != 0
6803 DEBUG(D_deliver|D_route) debug_printf("%s was previously delivered: "
6804 "discarded\n", addr->address);
6805 if (addr_remote == addr) addr_remote = addr->next;
6806 else if (addr_local == addr) addr_local = addr->next;
6809 /* If the router has same_domain_copy_routing set, we are permitted to copy
6810 the routing for any other addresses with the same domain. This is an
6811 optimisation to save repeated DNS lookups for "standard" remote domain
6812 routing. The option is settable only on routers that generate host lists.
6813 We play it very safe, and do the optimization only if the address is routed
6814 to a remote transport, there are no header changes, and the domain was not
6815 modified by the router. */
6817 if ( addr_remote == addr
6818 && addr->router->same_domain_copy_routing
6819 && !addr->prop.extra_headers
6820 && !addr->prop.remove_headers
6821 && old_domain == addr->domain
6824 address_item **chain = &addr_route;
6827 address_item *addr2 = *chain;
6828 if (Ustrcmp(addr2->domain, addr->domain) != 0)
6830 chain = &(addr2->next);
6834 /* Found a suitable address; take it off the routing list and add it to
6835 the remote delivery list. */
6837 *chain = addr2->next;
6838 addr2->next = addr_remote;
6839 addr_remote = addr2;
6841 /* Copy the routing data */
6843 addr2->domain = addr->domain;
6844 addr2->router = addr->router;
6845 addr2->transport = addr->transport;
6846 addr2->host_list = addr->host_list;
6847 addr2->fallback_hosts = addr->fallback_hosts;
6848 addr2->prop.errors_address = addr->prop.errors_address;
6849 copyflag(addr2, addr, af_hide_child);
6850 copyflag(addr2, addr, af_local_host_removed);
6852 DEBUG(D_deliver|D_route)
6853 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"
6855 "Routing for %s copied from %s\n",
6856 addr2->address, addr2->address, addr->address);
6859 } /* Continue with routing the next address. */
6860 } /* Loop to process any child addresses that the routers created, and
6861 any rerouted addresses that got put back on the new chain. */
6864 /* Debugging: show the results of the routing */
6866 DEBUG(D_deliver|D_retry|D_route)
6869 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
6870 debug_printf("After routing:\n Local deliveries:\n");
6871 for (p = addr_local; p; p = p->next)
6872 debug_printf(" %s\n", p->address);
6874 debug_printf(" Remote deliveries:\n");
6875 for (p = addr_remote; p; p = p->next)
6876 debug_printf(" %s\n", p->address);
6878 debug_printf(" Failed addresses:\n");
6879 for (p = addr_failed; p; p = p->next)
6880 debug_printf(" %s\n", p->address);
6882 debug_printf(" Deferred addresses:\n");
6883 for (p = addr_defer; p; p = p->next)
6884 debug_printf(" %s\n", p->address);
6887 /* Free any resources that were cached during routing. */
6892 /* These two variables are set only during routing, after check_local_user.
6893 Ensure they are not set in transports. */
6895 local_user_gid = (gid_t)(-1);
6896 local_user_uid = (uid_t)(-1);
6898 /* Check for any duplicate addresses. This check is delayed until after
6899 routing, because the flexibility of the routing configuration means that
6900 identical addresses with different parentage may end up being redirected to
6901 different addresses. Checking for duplicates too early (as we previously used
6902 to) makes this kind of thing not work. */
6904 do_duplicate_check(&addr_local);
6905 do_duplicate_check(&addr_remote);
6907 /* When acting as an MUA wrapper, we proceed only if all addresses route to a
6908 remote transport. The check that they all end up in one transaction happens in
6909 the do_remote_deliveries() function. */
6912 && (addr_local || addr_failed || addr_defer)
6916 uschar *which, *colon, *msg;
6923 else if (addr_defer)
6926 which = US"deferred";
6934 while (addr->parent) addr = addr->parent;
6939 msg = addr->message;
6941 else colon = msg = US"";
6943 /* We don't need to log here for a forced failure as it will already
6944 have been logged. Defer will also have been logged, but as a defer, so we do
6945 need to do the failure logging. */
6947 if (addr != addr_failed)
6948 log_write(0, LOG_MAIN, "** %s routing yielded a %s delivery",
6949 addr->address, which);
6951 /* Always write an error to the caller */
6953 fprintf(stderr, "routing %s yielded a %s delivery%s%s\n", addr->address,
6956 final_yield = DELIVER_MUA_FAILED;
6957 addr_failed = addr_defer = NULL; /* So that we remove the message */
6958 goto DELIVERY_TIDYUP;
6962 /* If this is a run to continue deliveries to an external channel that is
6963 already set up, defer any local deliveries. */
6965 if (continue_transport)
6969 address_item *addr = addr_defer;
6970 while (addr->next) addr = addr->next;
6971 addr->next = addr_local;
6974 addr_defer = addr_local;
6979 /* Because address rewriting can happen in the routers, we should not really do
6980 ANY deliveries until all addresses have been routed, so that all recipients of
6981 the message get the same headers. However, this is in practice not always
6982 possible, since sometimes remote addresses give DNS timeouts for days on end.
6983 The pragmatic approach is to deliver what we can now, saving any rewritten
6984 headers so that at least the next lot of recipients benefit from the rewriting
6985 that has already been done.
6987 If any headers have been rewritten during routing, update the spool file to
6988 remember them for all subsequent deliveries. This can be delayed till later if
6989 there is only address to be delivered - if it succeeds the spool write need not
6992 if ( header_rewritten
6993 && ( addr_local && (addr_local->next || addr_remote)
6994 || addr_remote && addr_remote->next
6997 /* Panic-dies on error */
6998 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
6999 header_rewritten = FALSE;
7003 /* If there are any deliveries to be and we do not already have the journal
7004 file, create it. This is used to record successful deliveries as soon as
7005 possible after each delivery is known to be complete. A file opened with
7006 O_APPEND is used so that several processes can run simultaneously.
7008 The journal is just insurance against crashes. When the spool file is
7009 ultimately updated at the end of processing, the journal is deleted. If a
7010 journal is found to exist at the start of delivery, the addresses listed
7011 therein are added to the non-recipients. */
7013 if (addr_local || addr_remote)
7017 uschar * fname = spool_fname(US"input", message_subdir, id, US"-J");
7019 if ((journal_fd = Uopen(fname,
7023 O_WRONLY|O_APPEND|O_CREAT|O_EXCL, SPOOL_MODE)) < 0)
7025 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't open journal file %s: %s",
7026 fname, strerror(errno));
7027 return DELIVER_NOT_ATTEMPTED;
7030 /* Set the close-on-exec flag, make the file owned by Exim, and ensure
7031 that the mode is correct - the group setting doesn't always seem to get
7032 set automatically. */
7034 if( fchown(journal_fd, exim_uid, exim_gid)
7035 || fchmod(journal_fd, SPOOL_MODE)
7037 || fcntl(journal_fd, F_SETFD, fcntl(journal_fd, F_GETFD) | FD_CLOEXEC)
7041 int ret = Uunlink(fname);
7042 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't set perms on journal file %s: %s",
7043 fname, strerror(errno));
7044 if(ret && errno != ENOENT)
7045 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7046 fname, strerror(errno));
7047 return DELIVER_NOT_ATTEMPTED;
7051 else if (journal_fd >= 0)
7059 /* Now we can get down to the business of actually doing deliveries. Local
7060 deliveries are done first, then remote ones. If ever the problems of how to
7061 handle fallback transports are figured out, this section can be put into a loop
7062 for handling fallbacks, though the uid switching will have to be revised. */
7064 /* Precompile a regex that is used to recognize a parameter in response
7065 to an LHLO command, if is isn't already compiled. This may be used on both
7066 local and remote LMTP deliveries. */
7068 if (!regex_IGNOREQUOTA)
7070 regex_must_compile(US"\\n250[\\s\\-]IGNOREQUOTA(\\s|\\n|$)", FALSE, TRUE);
7072 /* Handle local deliveries */
7076 DEBUG(D_deliver|D_transport)
7077 debug_printf(">>>>>>>>>>>>>>>> Local deliveries >>>>>>>>>>>>>>>>\n");
7078 do_local_deliveries();
7079 disable_logging = FALSE;
7082 /* If queue_run_local is set, we do not want to attempt any remote deliveries,
7083 so just queue them all. */
7085 if (queue_run_local)
7088 address_item *addr = addr_remote;
7089 addr_remote = addr->next;
7091 addr->basic_errno = ERRNO_LOCAL_ONLY;
7092 addr->message = US"remote deliveries suppressed";
7093 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_TRANSPORT, 0);
7096 /* Handle remote deliveries */
7100 DEBUG(D_deliver|D_transport)
7101 debug_printf(">>>>>>>>>>>>>>>> Remote deliveries >>>>>>>>>>>>>>>>\n");
7103 /* Precompile some regex that are used to recognize parameters in response
7104 to an EHLO command, if they aren't already compiled. */
7108 /* Now sort the addresses if required, and do the deliveries. The yield of
7109 do_remote_deliveries is FALSE when mua_wrapper is set and all addresses
7110 cannot be delivered in one transaction. */
7112 if (remote_sort_domains) sort_remote_deliveries();
7113 if (!do_remote_deliveries(FALSE))
7115 log_write(0, LOG_MAIN, "** mua_wrapper is set but recipients cannot all "
7116 "be delivered in one transaction");
7117 fprintf(stderr, "delivery to smarthost failed (configuration problem)\n");
7119 final_yield = DELIVER_MUA_FAILED;
7120 addr_failed = addr_defer = NULL; /* So that we remove the message */
7121 goto DELIVERY_TIDYUP;
7124 /* See if any of the addresses that failed got put on the queue for delivery
7125 to their fallback hosts. We do it this way because often the same fallback
7126 host is used for many domains, so all can be sent in a single transaction
7127 (if appropriately configured). */
7129 if (addr_fallback && !mua_wrapper)
7131 DEBUG(D_deliver) debug_printf("Delivering to fallback hosts\n");
7132 addr_remote = addr_fallback;
7133 addr_fallback = NULL;
7134 if (remote_sort_domains) sort_remote_deliveries();
7135 do_remote_deliveries(TRUE);
7137 disable_logging = FALSE;
7141 /* All deliveries are now complete. Ignore SIGTERM during this tidying up
7142 phase, to minimize cases of half-done things. */
7145 debug_printf(">>>>>>>>>>>>>>>> deliveries are done >>>>>>>>>>>>>>>>\n");
7146 cancel_cutthrough_connection(TRUE, US"deliveries are done");
7148 /* Root privilege is no longer needed */
7150 exim_setugid(exim_uid, exim_gid, FALSE, US"post-delivery tidying");
7152 set_process_info("tidying up after delivering %s", message_id);
7153 signal(SIGTERM, SIG_IGN);
7155 /* When we are acting as an MUA wrapper, the smtp transport will either have
7156 succeeded for all addresses, or failed them all in normal cases. However, there
7157 are some setup situations (e.g. when a named port does not exist) that cause an
7158 immediate exit with deferral of all addresses. Convert those into failures. We
7159 do not ever want to retry, nor do we want to send a bounce message. */
7165 address_item *addr, *nextaddr;
7166 for (addr = addr_defer; addr; addr = nextaddr)
7168 log_write(0, LOG_MAIN, "** %s mua_wrapper forced failure for deferred "
7169 "delivery", addr->address);
7170 nextaddr = addr->next;
7171 addr->next = addr_failed;
7177 /* Now all should either have succeeded or failed. */
7180 final_yield = DELIVER_MUA_SUCCEEDED;
7184 uschar *s = addr_failed->user_message;
7186 if (!s) s = addr_failed->message;
7188 fprintf(stderr, "Delivery failed: ");
7189 if (addr_failed->basic_errno > 0)
7191 fprintf(stderr, "%s", strerror(addr_failed->basic_errno));
7192 if (s) fprintf(stderr, ": ");
7194 if ((host = addr_failed->host_used))
7195 fprintf(stderr, "H=%s [%s]: ", host->name, host->address);
7197 fprintf(stderr, "%s", CS s);
7198 else if (addr_failed->basic_errno <= 0)
7199 fprintf(stderr, "unknown error");
7200 fprintf(stderr, "\n");
7202 final_yield = DELIVER_MUA_FAILED;
7207 /* In a normal configuration, we now update the retry database. This is done in
7208 one fell swoop at the end in order not to keep opening and closing (and
7209 locking) the database. The code for handling retries is hived off into a
7210 separate module for convenience. We pass it the addresses of the various
7211 chains, because deferred addresses can get moved onto the failed chain if the
7212 retry cutoff time has expired for all alternative destinations. Bypass the
7213 updating of the database if the -N flag is set, which is a debugging thing that
7214 prevents actual delivery. */
7216 else if (!dont_deliver)
7217 retry_update(&addr_defer, &addr_failed, &addr_succeed);
7219 /* Send DSN for successful messages if requested */
7220 addr_senddsn = NULL;
7222 for (addr_dsntmp = addr_succeed; addr_dsntmp; addr_dsntmp = addr_dsntmp->next)
7224 /* af_ignore_error not honored here. it's not an error */
7225 DEBUG(D_deliver) debug_printf("DSN: processing router : %s\n"
7226 "DSN: processing successful delivery address: %s\n"
7227 "DSN: Sender_address: %s\n"
7228 "DSN: orcpt: %s flags: %d\n"
7229 "DSN: envid: %s ret: %d\n"
7230 "DSN: Final recipient: %s\n"
7231 "DSN: Remote SMTP server supports DSN: %d\n",
7232 addr_dsntmp->router->name,
7233 addr_dsntmp->address,
7235 addr_dsntmp->dsn_orcpt, addr_dsntmp->dsn_flags,
7237 addr_dsntmp->address,
7238 addr_dsntmp->dsn_aware
7241 /* send report if next hop not DSN aware or a router flagged "last DSN hop"
7242 and a report was requested */
7243 if ( ( addr_dsntmp->dsn_aware != dsn_support_yes
7244 || addr_dsntmp->dsn_flags & rf_dsnlasthop
7246 && addr_dsntmp->dsn_flags & rf_dsnflags
7247 && addr_dsntmp->dsn_flags & rf_notify_success
7250 /* copy and relink address_item and send report with all of them at once later */
7251 address_item * addr_next = addr_senddsn;
7252 addr_senddsn = store_get(sizeof(address_item));
7253 *addr_senddsn = *addr_dsntmp;
7254 addr_senddsn->next = addr_next;
7257 DEBUG(D_deliver) debug_printf("DSN: not sending DSN success message\n");
7265 /* create exim process to send message */
7266 pid = child_open_exim(&fd);
7268 DEBUG(D_deliver) debug_printf("DSN: child_open_exim returns: %d\n", pid);
7270 if (pid < 0) /* Creation of child failed */
7272 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to "
7273 "create child process to send failure message: %s", getpid(),
7274 getppid(), strerror(errno));
7276 DEBUG(D_deliver) debug_printf("DSN: child_open_exim failed\n");
7278 else /* Creation of child succeeded */
7280 FILE *f = fdopen(fd, "wb");
7281 /* header only as required by RFC. only failure DSN needs to honor RET=FULL */
7283 transport_ctx tctx = {{0}};
7286 debug_printf("sending error message to: %s\n", sender_address);
7288 /* build unique id for MIME boundary */
7289 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
7290 DEBUG(D_deliver) debug_printf("DSN: MIME boundary: %s\n", bound);
7292 if (errors_reply_to)
7293 fprintf(f, "Reply-To: %s\n", errors_reply_to);
7295 fprintf(f, "Auto-Submitted: auto-generated\n"
7296 "From: Mail Delivery System <Mailer-Daemon@%s>\n"
7298 "Subject: Delivery Status Notification\n"
7299 "Content-Type: multipart/report; report-type=delivery-status; boundary=%s\n"
7300 "MIME-Version: 1.0\n\n"
7303 "Content-type: text/plain; charset=us-ascii\n\n"
7305 "This message was created automatically by mail delivery software.\n"
7306 " ----- The following addresses had successful delivery notifications -----\n",
7307 qualify_domain_sender, sender_address, bound, bound);
7309 for (addr_dsntmp = addr_senddsn; addr_dsntmp;
7310 addr_dsntmp = addr_dsntmp->next)
7311 fprintf(f, "<%s> (relayed %s)\n\n",
7312 addr_dsntmp->address,
7313 (addr_dsntmp->dsn_flags & rf_dsnlasthop) == 1
7314 ? "via non DSN router"
7315 : addr_dsntmp->dsn_aware == dsn_support_no
7316 ? "to non-DSN-aware mailer"
7317 : "via non \"Remote SMTP\" router"
7321 "Content-type: message/delivery-status\n\n"
7322 "Reporting-MTA: dns; %s\n",
7323 bound, smtp_active_hostname);
7326 { /* must be decoded from xtext: see RFC 3461:6.3a */
7328 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
7329 fprintf(f, "Original-Envelope-ID: %s\n", dsn_envid);
7331 fprintf(f, "X-Original-Envelope-ID: error decoding xtext formatted ENVID\n");
7335 for (addr_dsntmp = addr_senddsn;
7337 addr_dsntmp = addr_dsntmp->next)
7339 if (addr_dsntmp->dsn_orcpt)
7340 fprintf(f,"Original-Recipient: %s\n", addr_dsntmp->dsn_orcpt);
7342 fprintf(f, "Action: delivered\n"
7343 "Final-Recipient: rfc822;%s\n"
7345 addr_dsntmp->address);
7347 if (addr_dsntmp->host_used && addr_dsntmp->host_used->name)
7348 fprintf(f, "Remote-MTA: dns; %s\nDiagnostic-Code: smtp; 250 Ok\n\n",
7349 addr_dsntmp->host_used->name);
7351 fprintf(f, "Diagnostic-Code: X-Exim; relayed via non %s router\n\n",
7352 (addr_dsntmp->dsn_flags & rf_dsnlasthop) == 1 ? "DSN" : "SMTP");
7355 fprintf(f, "--%s\nContent-type: text/rfc822-headers\n\n", bound);
7358 transport_filter_argv = NULL; /* Just in case */
7359 return_path = sender_address; /* In case not previously set */
7361 /* Write the original email out */
7363 tctx.u.fd = fileno(f);
7364 tctx.options = topt_add_return_path | topt_no_body;
7365 transport_write_message(&tctx, 0);
7368 fprintf(f,"\n--%s--\n", bound);
7372 rc = child_close(pid, 0); /* Waits for child to close, no timeout */
7376 /* If any addresses failed, we must send a message to somebody, unless
7377 af_ignore_error is set, in which case no action is taken. It is possible for
7378 several messages to get sent if there are addresses with different
7385 uschar *logtod = tod_stamp(tod_log);
7387 address_item *handled_addr = NULL;
7388 address_item **paddr;
7389 address_item *msgchain = NULL;
7390 address_item **pmsgchain = &msgchain;
7392 /* There are weird cases when logging is disabled in the transport. However,
7393 there may not be a transport (address failed by a router). */
7395 disable_logging = FALSE;
7396 if (addr_failed->transport)
7397 disable_logging = addr_failed->transport->disable_logging;
7400 debug_printf("processing failed address %s\n", addr_failed->address);
7402 /* There are only two ways an address in a bounce message can get here:
7404 (1) When delivery was initially deferred, but has now timed out (in the call
7405 to retry_update() above). We can detect this by testing for
7406 af_retry_timedout. If the address does not have its own errors address,
7407 we arrange to ignore the error.
7409 (2) If delivery failures for bounce messages are being ignored. We can detect
7410 this by testing for af_ignore_error. This will also be set if a bounce
7411 message has been autothawed and the ignore_bounce_errors_after time has
7412 passed. It might also be set if a router was explicitly configured to
7413 ignore errors (errors_to = "").
7415 If neither of these cases obtains, something has gone wrong. Log the
7416 incident, but then ignore the error. */
7418 if (sender_address[0] == 0 && !addr_failed->prop.errors_address)
7420 if ( !testflag(addr_failed, af_retry_timedout)
7421 && !addr_failed->prop.ignore_error)
7422 log_write(0, LOG_MAIN|LOG_PANIC, "internal error: bounce message "
7423 "failure is neither frozen nor ignored (it's been ignored)");
7425 addr_failed->prop.ignore_error = TRUE;
7428 /* If the first address on the list has af_ignore_error set, just remove
7429 it from the list, throw away any saved message file, log it, and
7430 mark the recipient done. */
7432 if ( addr_failed->prop.ignore_error
7433 || ( addr_failed->dsn_flags & rf_dsnflags
7434 && (addr_failed->dsn_flags & rf_notify_failure) != rf_notify_failure
7438 addr_failed = addr->next;
7439 if (addr->return_filename) Uunlink(addr->return_filename);
7441 log_write(0, LOG_MAIN, "%s%s%s%s: error ignored",
7443 !addr->parent ? US"" : US" <",
7444 !addr->parent ? US"" : addr->parent->address,
7445 !addr->parent ? US"" : US">");
7447 address_done(addr, logtod);
7448 child_done(addr, logtod);
7449 /* Panic-dies on error */
7450 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7453 /* Otherwise, handle the sending of a message. Find the error address for
7454 the first address, then send a message that includes all failed addresses
7455 that have the same error address. Note the bounce_recipient is a global so
7456 that it can be accessed by $bounce_recipient while creating a customized
7461 if (!(bounce_recipient = addr_failed->prop.errors_address))
7462 bounce_recipient = sender_address;
7464 /* Make a subprocess to send a message */
7466 if ((pid = child_open_exim(&fd)) < 0)
7467 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to "
7468 "create child process to send failure message: %s", getpid(),
7469 getppid(), strerror(errno));
7471 /* Creation of child succeeded */
7478 uschar *bcc, *emf_text;
7479 FILE *f = fdopen(fd, "wb");
7481 BOOL to_sender = strcmpic(sender_address, bounce_recipient) == 0;
7482 int max = (bounce_return_size_limit/DELIVER_IN_BUFFER_SIZE + 1) *
7483 DELIVER_IN_BUFFER_SIZE;
7485 uschar *dsnlimitmsg;
7486 uschar *dsnnotifyhdr;
7490 debug_printf("sending error message to: %s\n", bounce_recipient);
7492 /* Scan the addresses for all that have the same errors address, removing
7493 them from the addr_failed chain, and putting them on msgchain. */
7495 paddr = &addr_failed;
7496 for (addr = addr_failed; addr; addr = *paddr)
7497 if (Ustrcmp(bounce_recipient, addr->prop.errors_address
7498 ? addr->prop.errors_address : sender_address) == 0)
7499 { /* The same - dechain */
7500 *paddr = addr->next;
7503 pmsgchain = &(addr->next);
7506 paddr = &addr->next; /* Not the same; skip */
7508 /* Include X-Failed-Recipients: for automatic interpretation, but do
7509 not let any one header line get too long. We do this by starting a
7510 new header every 50 recipients. Omit any addresses for which the
7511 "hide_child" flag is set. */
7513 for (addr = msgchain; addr; addr = addr->next)
7515 if (testflag(addr, af_hide_child)) continue;
7523 ? "X-Failed-Recipients: "
7525 testflag(addr, af_pfr) && addr->parent
7526 ? string_printing(addr->parent->address)
7527 : string_printing(addr->address));
7529 if (rcount > 0) fprintf(f, "\n");
7531 /* Output the standard headers */
7533 if (errors_reply_to)
7534 fprintf(f, "Reply-To: %s\n", errors_reply_to);
7535 fprintf(f, "Auto-Submitted: auto-replied\n");
7537 fprintf(f, "To: %s\n", bounce_recipient);
7539 /* generate boundary string and output MIME-Headers */
7540 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
7542 fprintf(f, "Content-Type: multipart/report;"
7543 " report-type=delivery-status; boundary=%s\n"
7544 "MIME-Version: 1.0\n",
7547 /* Open a template file if one is provided. Log failure to open, but
7548 carry on - default texts will be used. */
7550 if (bounce_message_file)
7551 if (!(emf = Ufopen(bounce_message_file, "rb")))
7552 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for error "
7553 "message texts: %s", bounce_message_file, strerror(errno));
7555 /* Quietly copy to configured additional addresses if required. */
7557 if ((bcc = moan_check_errorcopy(bounce_recipient)))
7558 fprintf(f, "Bcc: %s\n", bcc);
7560 /* The texts for the message can be read from a template file; if there
7561 isn't one, or if it is too short, built-in texts are used. The first
7562 emf text is a Subject: and any other headers. */
7564 if ((emf_text = next_emf(emf, US"header")))
7565 fprintf(f, "%s\n", emf_text);
7567 fprintf(f, "Subject: Mail delivery failed%s\n\n",
7568 to_sender? ": returning message to sender" : "");
7570 /* output human readable part as text/plain section */
7572 "Content-type: text/plain; charset=us-ascii\n\n",
7575 if ((emf_text = next_emf(emf, US"intro")))
7576 fprintf(f, "%s", CS emf_text);
7580 /* This message has been reworded several times. It seems to be confusing to
7581 somebody, however it is worded. I have retreated to the original, simple
7583 "This message was created automatically by mail delivery software.\n");
7585 if (bounce_message_text)
7586 fprintf(f, "%s", CS bounce_message_text);
7589 "\nA message that you sent could not be delivered to one or more of its\n"
7590 "recipients. This is a permanent error. The following address(es) failed:\n");
7593 "\nA message sent by\n\n <%s>\n\n"
7594 "could not be delivered to one or more of its recipients. The following\n"
7595 "address(es) failed:\n", sender_address);
7599 /* Process the addresses, leaving them on the msgchain if they have a
7600 file name for a return message. (There has already been a check in
7601 post_process_one() for the existence of data in the message file.) A TRUE
7602 return from print_address_information() means that the address is not
7606 for (addr = msgchain; addr; addr = *paddr)
7608 if (print_address_information(addr, f, US" ", US"\n ", US""))
7609 print_address_error(addr, f, US"");
7611 /* End the final line for the address */
7615 /* Leave on msgchain if there's a return file. */
7617 if (addr->return_file >= 0)
7619 paddr = &(addr->next);
7623 /* Else save so that we can tick off the recipient when the
7628 *paddr = addr->next;
7629 addr->next = handled_addr;
7630 handled_addr = addr;
7636 /* Get the next text, whether we need it or not, so as to be
7637 positioned for the one after. */
7639 emf_text = next_emf(emf, US"generated text");
7641 /* If there were any file messages passed by the local transports,
7642 include them in the message. Then put the address on the handled chain.
7643 In the case of a batch of addresses that were all sent to the same
7644 transport, the return_file field in all of them will contain the same
7645 fd, and the return_filename field in the *last* one will be set (to the
7646 name of the file). */
7650 address_item *nextaddr;
7653 fprintf(f, "%s", CS emf_text);
7656 "The following text was generated during the delivery "
7657 "attempt%s:\n", (filecount > 1)? "s" : "");
7659 for (addr = msgchain; addr; addr = nextaddr)
7662 address_item *topaddr = addr;
7664 /* List all the addresses that relate to this file */
7667 while(addr) /* Insurance */
7669 print_address_information(addr, f, US"------ ", US"\n ",
7671 if (addr->return_filename) break;
7676 /* Now copy the file */
7678 if (!(fm = Ufopen(addr->return_filename, "rb")))
7679 fprintf(f, " +++ Exim error... failed to open text file: %s\n",
7683 while ((ch = fgetc(fm)) != EOF) fputc(ch, f);
7686 Uunlink(addr->return_filename);
7688 /* Can now add to handled chain, first fishing off the next
7689 address on the msgchain. */
7691 nextaddr = addr->next;
7692 addr->next = handled_addr;
7693 handled_addr = topaddr;
7698 /* output machine readable part */
7700 if (message_smtputf8)
7702 "Content-type: message/global-delivery-status\n\n"
7703 "Reporting-MTA: dns; %s\n",
7704 bound, smtp_active_hostname);
7708 "Content-type: message/delivery-status\n\n"
7709 "Reporting-MTA: dns; %s\n",
7710 bound, smtp_active_hostname);
7714 /* must be decoded from xtext: see RFC 3461:6.3a */
7716 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
7717 fprintf(f, "Original-Envelope-ID: %s\n", dsn_envid);
7719 fprintf(f, "X-Original-Envelope-ID: error decoding xtext formatted ENVID\n");
7723 for (addr = handled_addr; addr; addr = addr->next)
7726 fprintf(f, "Action: failed\n"
7727 "Final-Recipient: rfc822;%s\n"
7730 if ((hu = addr->host_used) && hu->name)
7733 fprintf(f, "Remote-MTA: dns; %s\n", hu->name);
7734 #ifdef EXPERIMENTAL_DSN_INFO
7737 uschar * p = hu->port == 25
7738 ? US"" : string_sprintf(":%d", hu->port);
7739 fprintf(f, "Remote-MTA: X-ip; [%s]%s\n", hu->address, p);
7741 if ((s = addr->smtp_greeting) && *s)
7742 fprintf(f, "X-Remote-MTA-smtp-greeting: X-str; %s\n", s);
7743 if ((s = addr->helo_response) && *s)
7744 fprintf(f, "X-Remote-MTA-helo-response: X-str; %s\n", s);
7745 if ((s = addr->message) && *s)
7746 fprintf(f, "X-Exim-Diagnostic: X-str; %s\n", s);
7748 print_dsn_diagnostic_code(addr, f);
7753 /* Now copy the message, trying to give an intelligible comment if
7754 it is too long for it all to be copied. The limit isn't strictly
7755 applied because of the buffering. There is, however, an option
7756 to suppress copying altogether. */
7758 emf_text = next_emf(emf, US"copy");
7761 we ignore the intro text from template and add
7762 the text for bounce_return_size_limit at the end.
7764 bounce_return_message is ignored
7765 in case RET= is defined we honor these values
7766 otherwise bounce_return_body is honored.
7768 bounce_return_size_limit is always honored.
7771 fprintf(f, "--%s\n", bound);
7773 dsnlimitmsg = US"X-Exim-DSN-Information: Due to administrative limits only headers are returned";
7774 dsnnotifyhdr = NULL;
7775 topt = topt_add_return_path;
7777 /* RET=HDRS? top priority */
7778 if (dsn_ret == dsn_ret_hdrs)
7779 topt |= topt_no_body;
7782 struct stat statbuf;
7784 /* no full body return at all? */
7785 if (!bounce_return_body)
7787 topt |= topt_no_body;
7788 /* add header if we overrule RET=FULL */
7789 if (dsn_ret == dsn_ret_full)
7790 dsnnotifyhdr = dsnlimitmsg;
7792 /* line length limited... return headers only if oversize */
7793 /* size limited ... return headers only if limit reached */
7794 else if ( max_received_linelength > bounce_return_linesize_limit
7795 || ( bounce_return_size_limit > 0
7796 && fstat(deliver_datafile, &statbuf) == 0
7797 && statbuf.st_size > max
7800 topt |= topt_no_body;
7801 dsnnotifyhdr = dsnlimitmsg;
7806 if (message_smtputf8)
7807 fputs(topt & topt_no_body ? "Content-type: message/global-headers\n\n"
7808 : "Content-type: message/global\n\n",
7812 fputs(topt & topt_no_body ? "Content-type: text/rfc822-headers\n\n"
7813 : "Content-type: message/rfc822\n\n",
7817 transport_filter_argv = NULL; /* Just in case */
7818 return_path = sender_address; /* In case not previously set */
7819 { /* Dummy transport for headers add */
7820 transport_ctx tctx = {{0}};
7821 transport_instance tb = {0};
7823 tctx.u.fd = fileno(f);
7825 tctx.options = topt;
7826 tb.add_headers = dsnnotifyhdr;
7828 transport_write_message(&tctx, 0);
7832 /* we never add the final text. close the file */
7836 fprintf(f, "\n--%s--\n", bound);
7838 /* Close the file, which should send an EOF to the child process
7839 that is receiving the message. Wait for it to finish. */
7842 rc = child_close(pid, 0); /* Waits for child to close, no timeout */
7844 /* In the test harness, let the child do it's thing first. */
7846 if (running_in_test_harness) millisleep(500);
7848 /* If the process failed, there was some disaster in setting up the
7849 error message. Unless the message is very old, ensure that addr_defer
7850 is non-null, which will have the effect of leaving the message on the
7851 spool. The failed addresses will get tried again next time. However, we
7852 don't really want this to happen too often, so freeze the message unless
7853 there are some genuine deferred addresses to try. To do this we have
7854 to call spool_write_header() here, because with no genuine deferred
7855 addresses the normal code below doesn't get run. */
7860 if (now - received_time.tv_sec < retry_maximum_timeout && !addr_defer)
7862 addr_defer = (address_item *)(+1);
7863 deliver_freeze = TRUE;
7864 deliver_frozen_at = time(NULL);
7865 /* Panic-dies on error */
7866 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7869 deliver_msglog("Process failed (%d) when writing error message "
7870 "to %s%s", rc, bounce_recipient, s);
7871 log_write(0, LOG_MAIN, "Process failed (%d) when writing error message "
7872 "to %s%s", rc, bounce_recipient, s);
7875 /* The message succeeded. Ensure that the recipients that failed are
7876 now marked finished with on the spool and their parents updated. */
7880 for (addr = handled_addr; addr; addr = addr->next)
7882 address_done(addr, logtod);
7883 child_done(addr, logtod);
7885 /* Panic-dies on error */
7886 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7892 disable_logging = FALSE; /* In case left set */
7894 /* Come here from the mua_wrapper case if routing goes wrong */
7898 /* If there are now no deferred addresses, we are done. Preserve the
7899 message log if so configured, and we are using them. Otherwise, sling it.
7900 Then delete the message itself. */
7908 fname = spool_fname(US"msglog", message_subdir, id, US"");
7909 if (preserve_message_logs)
7912 uschar * moname = spool_fname(US"msglog.OLD", US"", id, US"");
7914 if ((rc = Urename(fname, moname)) < 0)
7916 (void)directory_make(spool_directory,
7917 spool_sname(US"msglog.OLD", US""),
7918 MSGLOG_DIRECTORY_MODE, TRUE);
7919 rc = Urename(fname, moname);
7922 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to move %s to the "
7923 "msglog.OLD directory", fname);
7926 if (Uunlink(fname) < 0)
7927 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7928 fname, strerror(errno));
7931 /* Remove the two message files. */
7933 fname = spool_fname(US"input", message_subdir, id, US"-D");
7934 if (Uunlink(fname) < 0)
7935 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7936 fname, strerror(errno));
7937 fname = spool_fname(US"input", message_subdir, id, US"-H");
7938 if (Uunlink(fname) < 0)
7939 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7940 fname, strerror(errno));
7942 /* Log the end of this message, with queue time if requested. */
7944 if (LOGGING(queue_time_overall))
7945 log_write(0, LOG_MAIN, "Completed QT=%s",
7946 string_timesince(&received_time));
7948 log_write(0, LOG_MAIN, "Completed");
7950 /* Unset deliver_freeze so that we won't try to move the spool files further down */
7951 deliver_freeze = FALSE;
7953 #ifndef DISABLE_EVENT
7954 (void) event_raise(event_action, US"msg:complete", NULL);
7958 /* If there are deferred addresses, we are keeping this message because it is
7959 not yet completed. Lose any temporary files that were catching output from
7960 pipes for any of the deferred addresses, handle one-time aliases, and see if
7961 the message has been on the queue for so long that it is time to send a warning
7962 message to the sender, unless it is a mailer-daemon. If all deferred addresses
7963 have the same domain, we can set deliver_domain for the expansion of
7964 delay_warning_ condition - if any of them are pipes, files, or autoreplies, use
7965 the parent's domain.
7967 If all the deferred addresses have an error number that indicates "retry time
7968 not reached", skip sending the warning message, because it won't contain the
7969 reason for the delay. It will get sent at the next real delivery attempt.
7970 However, if at least one address has tried, we'd better include all of them in
7973 If we can't make a process to send the message, don't worry.
7975 For mailing list expansions we want to send the warning message to the
7976 mailing list manager. We can't do a perfect job here, as some addresses may
7977 have different errors addresses, but if we take the errors address from
7978 each deferred address it will probably be right in most cases.
7980 If addr_defer == +1, it means there was a problem sending an error message
7981 for failed addresses, and there were no "real" deferred addresses. The value
7982 was set just to keep the message on the spool, so there is nothing to do here.
7985 else if (addr_defer != (address_item *)(+1))
7988 uschar *recipients = US"";
7989 BOOL delivery_attempted = FALSE;
7991 deliver_domain = testflag(addr_defer, af_pfr)
7992 ? addr_defer->parent->domain : addr_defer->domain;
7994 for (addr = addr_defer; addr; addr = addr->next)
7996 address_item *otaddr;
7998 if (addr->basic_errno > ERRNO_RETRY_BASE) delivery_attempted = TRUE;
8002 const uschar *d = testflag(addr, af_pfr)
8003 ? addr->parent->domain : addr->domain;
8005 /* The domain may be unset for an address that has never been routed
8006 because the system filter froze the message. */
8008 if (!d || Ustrcmp(d, deliver_domain) != 0)
8009 deliver_domain = NULL;
8012 if (addr->return_filename) Uunlink(addr->return_filename);
8014 /* Handle the case of one-time aliases. If any address in the ancestry
8015 of this one is flagged, ensure it is in the recipients list, suitably
8016 flagged, and that its parent is marked delivered. */
8018 for (otaddr = addr; otaddr; otaddr = otaddr->parent)
8019 if (otaddr->onetime_parent) break;
8024 int t = recipients_count;
8026 for (i = 0; i < recipients_count; i++)
8028 uschar *r = recipients_list[i].address;
8029 if (Ustrcmp(otaddr->onetime_parent, r) == 0) t = i;
8030 if (Ustrcmp(otaddr->address, r) == 0) break;
8033 /* Didn't find the address already in the list, and did find the
8034 ultimate parent's address in the list, and they really are different
8035 (i.e. not from an identity-redirect). After adding the recipient,
8036 update the errors address in the recipients list. */
8038 if ( i >= recipients_count && t < recipients_count
8039 && Ustrcmp(otaddr->address, otaddr->parent->address) != 0)
8041 DEBUG(D_deliver) debug_printf("one_time: adding %s in place of %s\n",
8042 otaddr->address, otaddr->parent->address);
8043 receive_add_recipient(otaddr->address, t);
8044 recipients_list[recipients_count-1].errors_to = otaddr->prop.errors_address;
8045 tree_add_nonrecipient(otaddr->parent->address);
8046 update_spool = TRUE;
8050 /* Except for error messages, ensure that either the errors address for
8051 this deferred address or, if there is none, the sender address, is on the
8052 list of recipients for a warning message. */
8054 if (sender_address[0])
8056 uschar * s = addr->prop.errors_address;
8057 if (!s) s = sender_address;
8058 if (Ustrstr(recipients, s) == NULL)
8059 recipients = string_sprintf("%s%s%s", recipients,
8060 recipients[0] ? "," : "", s);
8064 /* Send a warning message if the conditions are right. If the condition check
8065 fails because of a lookup defer, there is nothing we can do. The warning
8066 is not sent. Another attempt will be made at the next delivery attempt (if
8070 && delivery_attempted
8071 && ( ((addr_defer->dsn_flags & rf_dsnflags) == 0)
8072 || (addr_defer->dsn_flags & rf_notify_delay) == rf_notify_delay
8074 && delay_warning[1] > 0
8075 && sender_address[0] != 0
8076 && ( !delay_warning_condition
8077 || expand_check_condition(delay_warning_condition,
8078 US"delay_warning", US"option")
8084 int queue_time = time(NULL) - received_time.tv_sec;
8086 /* When running in the test harness, there's an option that allows us to
8087 fudge this time so as to get repeatability of the tests. Take the first
8088 time off the list. In queue runs, the list pointer gets updated in the
8091 if (running_in_test_harness && fudged_queue_times[0] != 0)
8093 int qt = readconf_readtime(fudged_queue_times, '/', FALSE);
8096 DEBUG(D_deliver) debug_printf("fudged queue_times = %s\n",
8097 fudged_queue_times);
8102 /* See how many warnings we should have sent by now */
8104 for (count = 0; count < delay_warning[1]; count++)
8105 if (queue_time < delay_warning[count+2]) break;
8107 show_time = delay_warning[count+1];
8109 if (count >= delay_warning[1])
8112 int last_gap = show_time;
8113 if (count > 1) last_gap -= delay_warning[count];
8114 extra = (queue_time - delay_warning[count+1])/last_gap;
8115 show_time += last_gap * extra;
8121 debug_printf("time on queue = %s\n", readconf_printtime(queue_time));
8122 debug_printf("warning counts: required %d done %d\n", count,
8126 /* We have computed the number of warnings there should have been by now.
8127 If there haven't been enough, send one, and up the count to what it should
8130 if (warning_count < count)
8134 pid_t pid = child_open_exim(&fd);
8140 FILE *f = fdopen(fd, "wb");
8142 transport_ctx tctx = {{0}};
8144 if (warn_message_file)
8145 if (!(wmf = Ufopen(warn_message_file, "rb")))
8146 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for warning "
8147 "message texts: %s", warn_message_file, strerror(errno));
8149 warnmsg_recipients = recipients;
8150 warnmsg_delay = queue_time < 120*60
8151 ? string_sprintf("%d minutes", show_time/60)
8152 : string_sprintf("%d hours", show_time/3600);
8154 if (errors_reply_to)
8155 fprintf(f, "Reply-To: %s\n", errors_reply_to);
8156 fprintf(f, "Auto-Submitted: auto-replied\n");
8158 fprintf(f, "To: %s\n", recipients);
8160 /* generated boundary string and output MIME-Headers */
8161 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
8163 fprintf(f, "Content-Type: multipart/report;"
8164 " report-type=delivery-status; boundary=%s\n"
8165 "MIME-Version: 1.0\n",
8168 if ((wmf_text = next_emf(wmf, US"header")))
8169 fprintf(f, "%s\n", wmf_text);
8171 fprintf(f, "Subject: Warning: message %s delayed %s\n\n",
8172 message_id, warnmsg_delay);
8174 /* output human readable part as text/plain section */
8176 "Content-type: text/plain; charset=us-ascii\n\n",
8179 if ((wmf_text = next_emf(wmf, US"intro")))
8180 fprintf(f, "%s", CS wmf_text);
8184 "This message was created automatically by mail delivery software.\n");
8186 if (Ustrcmp(recipients, sender_address) == 0)
8188 "A message that you sent has not yet been delivered to one or more of its\n"
8189 "recipients after more than ");
8193 "A message sent by\n\n <%s>\n\n"
8194 "has not yet been delivered to one or more of its recipients after more than \n",
8197 fprintf(f, "%s on the queue on %s.\n\n"
8198 "The message identifier is: %s\n",
8199 warnmsg_delay, primary_hostname, message_id);
8201 for (h = header_list; h; h = h->next)
8202 if (strncmpic(h->text, US"Subject:", 8) == 0)
8203 fprintf(f, "The subject of the message is: %s", h->text + 9);
8204 else if (strncmpic(h->text, US"Date:", 5) == 0)
8205 fprintf(f, "The date of the message is: %s", h->text + 6);
8208 fprintf(f, "The address%s to which the message has not yet been "
8210 !addr_defer->next ? "" : "es",
8211 !addr_defer->next ? "is": "are");
8214 /* List the addresses, with error information if allowed */
8216 /* store addr_defer for machine readable part */
8217 address_item *addr_dsndefer = addr_defer;
8221 address_item *addr = addr_defer;
8222 addr_defer = addr->next;
8223 if (print_address_information(addr, f, US" ", US"\n ", US""))
8224 print_address_error(addr, f, US"Delay reason: ");
8233 if ((wmf_text = next_emf(wmf, US"final")))
8234 fprintf(f, "%s", CS wmf_text);
8240 "No action is required on your part. Delivery attempts will continue for\n"
8241 "some time, and this warning may be repeated at intervals if the message\n"
8242 "remains undelivered. Eventually the mail delivery software will give up,\n"
8243 "and when that happens, the message will be returned to you.\n");
8246 /* output machine readable part */
8247 fprintf(f, "\n--%s\n"
8248 "Content-type: message/delivery-status\n\n"
8249 "Reporting-MTA: dns; %s\n",
8251 smtp_active_hostname);
8256 /* must be decoded from xtext: see RFC 3461:6.3a */
8258 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
8259 fprintf(f,"Original-Envelope-ID: %s\n", dsn_envid);
8261 fprintf(f,"X-Original-Envelope-ID: error decoding xtext formatted ENVID\n");
8265 for ( ; addr_dsndefer; addr_dsndefer = addr_dsndefer->next)
8267 if (addr_dsndefer->dsn_orcpt)
8268 fprintf(f, "Original-Recipient: %s\n", addr_dsndefer->dsn_orcpt);
8270 fprintf(f, "Action: delayed\n"
8271 "Final-Recipient: rfc822;%s\n"
8273 addr_dsndefer->address);
8274 if (addr_dsndefer->host_used && addr_dsndefer->host_used->name)
8276 fprintf(f, "Remote-MTA: dns; %s\n",
8277 addr_dsndefer->host_used->name);
8278 print_dsn_diagnostic_code(addr_dsndefer, f);
8284 "Content-type: text/rfc822-headers\n\n",
8288 /* header only as required by RFC. only failure DSN needs to honor RET=FULL */
8289 tctx.u.fd = fileno(f);
8290 tctx.options = topt_add_return_path | topt_no_body;
8291 transport_filter_argv = NULL; /* Just in case */
8292 return_path = sender_address; /* In case not previously set */
8294 /* Write the original email out */
8295 transport_write_message(&tctx, 0);
8298 fprintf(f,"\n--%s--\n", bound);
8302 /* Close and wait for child process to complete, without a timeout.
8303 If there's an error, don't update the count. */
8306 if (child_close(pid, 0) == 0)
8308 warning_count = count;
8309 update_spool = TRUE; /* Ensure spool rewritten */
8315 /* Clear deliver_domain */
8317 deliver_domain = NULL;
8319 /* If this was a first delivery attempt, unset the first time flag, and
8320 ensure that the spool gets updated. */
8322 if (deliver_firsttime)
8324 deliver_firsttime = FALSE;
8325 update_spool = TRUE;
8328 /* If delivery was frozen and freeze_tell is set, generate an appropriate
8329 message, unless the message is a local error message (to avoid loops). Then
8330 log the freezing. If the text in "frozen_info" came from a system filter,
8331 it has been escaped into printing characters so as not to mess up log lines.
8332 For the "tell" message, we turn \n back into newline. Also, insert a newline
8333 near the start instead of the ": " string. */
8337 if (freeze_tell && freeze_tell[0] != 0 && !local_error_message)
8339 uschar *s = string_copy(frozen_info);
8340 uschar *ss = Ustrstr(s, " by the system filter: ");
8351 if (*ss == '\\' && ss[1] == 'n')
8358 moan_tell_someone(freeze_tell, addr_defer, US"Message frozen",
8359 "Message %s has been frozen%s.\nThe sender is <%s>.\n", message_id,
8363 /* Log freezing just before we update the -H file, to minimize the chance
8364 of a race problem. */
8366 deliver_msglog("*** Frozen%s\n", frozen_info);
8367 log_write(0, LOG_MAIN, "Frozen%s", frozen_info);
8370 /* If there have been any updates to the non-recipients list, or other things
8371 that get written to the spool, we must now update the spool header file so
8372 that it has the right information for the next delivery attempt. If there
8373 was more than one address being delivered, the header_change update is done
8374 earlier, in case one succeeds and then something crashes. */
8377 debug_printf("delivery deferred: update_spool=%d header_rewritten=%d\n",
8378 update_spool, header_rewritten);
8380 if (update_spool || header_rewritten)
8381 /* Panic-dies on error */
8382 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
8385 /* Finished with the message log. If the message is complete, it will have
8386 been unlinked or renamed above. */
8388 if (message_logs) (void)fclose(message_log);
8390 /* Now we can close and remove the journal file. Its only purpose is to record
8391 successfully completed deliveries asap so that this information doesn't get
8392 lost if Exim (or the machine) crashes. Forgetting about a failed delivery is
8393 not serious, as trying it again is not harmful. The journal might not be open
8394 if all addresses were deferred at routing or directing. Nevertheless, we must
8395 remove it if it exists (may have been lying around from a crash during the
8396 previous delivery attempt). We don't remove the journal if a delivery
8397 subprocess failed to pass back delivery information; this is controlled by
8398 the remove_journal flag. When the journal is left, we also don't move the
8399 message off the main spool if frozen and the option is set. It should get moved
8400 at the next attempt, after the journal has been inspected. */
8402 if (journal_fd >= 0) (void)close(journal_fd);
8406 uschar * fname = spool_fname(US"input", message_subdir, id, US"-J");
8408 if (Uunlink(fname) < 0 && errno != ENOENT)
8409 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s", fname,
8412 /* Move the message off the spool if requested */
8414 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
8415 if (deliver_freeze && move_frozen_messages)
8416 (void)spool_move_message(id, message_subdir, US"", US"F");
8420 /* Closing the data file frees the lock; if the file has been unlinked it
8421 will go away. Otherwise the message becomes available for another process
8424 (void)close(deliver_datafile);
8425 deliver_datafile = -1;
8426 DEBUG(D_deliver) debug_printf("end delivery of %s\n", id);
8428 /* It is unlikely that there will be any cached resources, since they are
8429 released after routing, and in the delivery subprocesses. However, it's
8430 possible for an expansion for something afterwards (for example,
8431 expand_check_condition) to do a lookup. We must therefore be sure everything is
8435 acl_where = ACL_WHERE_UNKNOWN;
8444 if (!regex_PIPELINING) regex_PIPELINING =
8445 regex_must_compile(US"\\n250[\\s\\-]PIPELINING(\\s|\\n|$)", FALSE, TRUE);
8447 if (!regex_SIZE) regex_SIZE =
8448 regex_must_compile(US"\\n250[\\s\\-]SIZE(\\s|\\n|$)", FALSE, TRUE);
8450 if (!regex_AUTH) regex_AUTH =
8451 regex_must_compile(US"\\n250[\\s\\-]AUTH\\s+([\\-\\w\\s]+)(?:\\n|$)",
8455 if (!regex_STARTTLS) regex_STARTTLS =
8456 regex_must_compile(US"\\n250[\\s\\-]STARTTLS(\\s|\\n|$)", FALSE, TRUE);
8459 if (!regex_CHUNKING) regex_CHUNKING =
8460 regex_must_compile(US"\\n250[\\s\\-]CHUNKING(\\s|\\n|$)", FALSE, TRUE);
8462 #ifndef DISABLE_PRDR
8463 if (!regex_PRDR) regex_PRDR =
8464 regex_must_compile(US"\\n250[\\s\\-]PRDR(\\s|\\n|$)", FALSE, TRUE);
8468 if (!regex_UTF8) regex_UTF8 =
8469 regex_must_compile(US"\\n250[\\s\\-]SMTPUTF8(\\s|\\n|$)", FALSE, TRUE);
8472 if (!regex_DSN) regex_DSN =
8473 regex_must_compile(US"\\n250[\\s\\-]DSN(\\s|\\n|$)", FALSE, TRUE);
8475 if (!regex_IGNOREQUOTA) regex_IGNOREQUOTA =
8476 regex_must_compile(US"\\n250[\\s\\-]IGNOREQUOTA(\\s|\\n|$)", FALSE, TRUE);
8481 deliver_get_sender_address (uschar * id)
8484 uschar * new_sender_address,
8485 * save_sender_address;
8486 BOOL save_qr = queue_running;
8489 /* make spool_open_datafile non-noisy on fail */
8491 queue_running = TRUE;
8493 /* Side effect: message_subdir is set for the (possibly split) spool directory */
8495 deliver_datafile = spool_open_datafile(id);
8496 queue_running = save_qr;
8497 if (deliver_datafile < 0)
8500 /* Save and restore the global sender_address. I'm not sure if we should
8501 not save/restore all the other global variables too, because
8502 spool_read_header() may change all of them. But OTOH, when this
8503 deliver_get_sender_address() gets called, the current message is done
8504 already and nobody needs the globals anymore. (HS12, 2015-08-21) */
8506 spoolname = string_sprintf("%s-H", id);
8507 save_sender_address = sender_address;
8509 rc = spool_read_header(spoolname, TRUE, TRUE);
8511 new_sender_address = sender_address;
8512 sender_address = save_sender_address;
8514 if (rc != spool_read_OK)
8517 assert(new_sender_address);
8519 (void)close(deliver_datafile);
8520 deliver_datafile = -1;
8522 return new_sender_address;
8528 delivery_re_exec(int exec_type)
8532 if (cutthrough.fd >= 0 && cutthrough.callout_hold_only)
8534 int pfd[2], channel_fd = cutthrough.fd, pid;
8536 smtp_peer_options = cutthrough.peer_options;
8537 continue_sequence = 0;
8540 if (cutthrough.is_tls)
8542 smtp_peer_options |= OPTION_TLS;
8543 sending_ip_address = cutthrough.snd_ip;
8544 sending_port = cutthrough.snd_port;
8546 where = US"socketpair";
8547 if (socketpair(AF_UNIX, SOCK_STREAM, 0, pfd) != 0)
8551 if ((pid = fork()) < 0)
8554 else if (pid == 0) /* child: fork again to totally dosconnect */
8558 _exit(pid ? EXIT_FAILURE : EXIT_SUCCESS);
8559 smtp_proxy_tls(big_buffer, big_buffer_size, pfd[0], 5*60);
8564 waitpid(pid, NULL, 0);
8565 (void) close(channel_fd); /* release the client socket */
8566 channel_fd = pfd[1];
8570 transport_do_pass_socket(cutthrough.transport, cutthrough.host.name,
8571 cutthrough.host.address, message_id, channel_fd);
8575 cancel_cutthrough_connection(TRUE, US"non-continued delivery");
8576 (void) child_exec_exim(exec_type, FALSE, NULL, FALSE, 2, US"-Mc", message_id);
8578 return; /* compiler quietening; control does not reach here. */
8582 LOG_MAIN | (exec_type == CEE_EXEC_EXIT ? LOG_PANIC : LOG_PANIC_DIE),
8583 "delivery re-exec %s failed: %s", where, strerror(errno));
8585 /* Get here if exec_type == CEE_EXEC_EXIT.
8586 Note: this must be _exit(), not exit(). */
8588 _exit(EX_EXECFAILED);
8593 /* End of deliver.c */