1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* Copyright (c) The Exim Maintainers 2020 */
7 /* See the file NOTICE for conditions of use and distribution. */
9 /* The main code for delivering a message. */
13 #include "transports/smtp.h"
18 /* Data block for keeping track of subprocesses for parallel remote
21 typedef struct pardata {
22 address_item *addrlist; /* chain of addresses */
23 address_item *addr; /* next address data expected for */
24 pid_t pid; /* subprocess pid */
25 int fd; /* pipe fd for getting result from subprocess */
26 int transport_count; /* returned transport count value */
27 BOOL done; /* no more data needed */
28 uschar *msg; /* error message */
29 uschar *return_path; /* return_path for these addresses */
32 /* Values for the process_recipients variable */
34 enum { RECIP_ACCEPT, RECIP_IGNORE, RECIP_DEFER,
35 RECIP_FAIL, RECIP_FAIL_FILTER, RECIP_FAIL_TIMEOUT,
38 /* Mutually recursive functions for marking addresses done. */
40 static void child_done(address_item *, uschar *);
41 static void address_done(address_item *, uschar *);
43 /* Table for turning base-62 numbers into binary */
45 static uschar tab62[] =
46 {0,1,2,3,4,5,6,7,8,9,0,0,0,0,0,0, /* 0-9 */
47 0,10,11,12,13,14,15,16,17,18,19,20, /* A-K */
48 21,22,23,24,25,26,27,28,29,30,31,32, /* L-W */
49 33,34,35, 0, 0, 0, 0, 0, /* X-Z */
50 0,36,37,38,39,40,41,42,43,44,45,46, /* a-k */
51 47,48,49,50,51,52,53,54,55,56,57,58, /* l-w */
55 /*************************************************
56 * Local static variables *
57 *************************************************/
59 /* addr_duplicate is global because it needs to be seen from the Envelope-To
62 static address_item *addr_defer = NULL;
63 static address_item *addr_failed = NULL;
64 static address_item *addr_fallback = NULL;
65 static address_item *addr_local = NULL;
66 static address_item *addr_new = NULL;
67 static address_item *addr_remote = NULL;
68 static address_item *addr_route = NULL;
69 static address_item *addr_succeed = NULL;
70 static address_item *addr_senddsn = NULL;
72 static FILE *message_log = NULL;
73 static BOOL update_spool;
74 static BOOL remove_journal;
75 static int parcount = 0;
76 static pardata *parlist = NULL;
77 static int return_count;
78 static uschar *frozen_info = US"";
79 static uschar *used_return_path = NULL;
83 /*************************************************
84 * read as much as requested *
85 *************************************************/
87 /* The syscall read(2) doesn't always returns as much as we want. For
88 several reasons it might get less. (Not talking about signals, as syscalls
89 are restartable). When reading from a network or pipe connection the sender
90 might send in smaller chunks, with delays between these chunks. The read(2)
91 may return such a chunk.
93 The more the writer writes and the smaller the pipe between write and read is,
94 the more we get the chance of reading leass than requested. (See bug 2130)
96 This function read(2)s until we got all the data we *requested*.
98 Note: This function may block. Use it only if you're sure about the
99 amount of data you will get.
102 fd the file descriptor to read from
103 buffer pointer to a buffer of size len
104 len the requested(!) amount of bytes
106 Returns: the amount of bytes read
109 readn(int fd, void * buffer, size_t len)
111 uschar * next = buffer;
112 uschar * end = next + len;
116 ssize_t got = read(fd, next, end - next);
118 /* I'm not sure if there are signals that can interrupt us,
119 for now I assume the worst */
120 if (got == -1 && errno == EINTR) continue;
121 if (got <= 0) return next - US buffer;
129 /*************************************************
130 * Make a new address item *
131 *************************************************/
133 /* This function gets the store and initializes with default values. The
134 transport_return value defaults to DEFER, so that any unexpected failure to
135 deliver does not wipe out the message. The default unique string is set to a
136 copy of the address, so that its domain can be lowercased.
139 address the RFC822 address string
140 copy force a copy of the address
142 Returns: a pointer to an initialized address_item
146 deliver_make_addr(uschar *address, BOOL copy)
148 address_item *addr = store_get(sizeof(address_item), FALSE);
149 *addr = address_defaults;
150 if (copy) address = string_copy(address);
151 addr->address = address;
152 addr->unique = string_copy(address);
159 /*************************************************
160 * Set expansion values for an address *
161 *************************************************/
163 /* Certain expansion variables are valid only when handling an address or
164 address list. This function sets them up or clears the values, according to its
168 addr the address in question, or NULL to clear values
173 deliver_set_expansions(address_item *addr)
177 const uschar ***p = address_expansions;
178 while (*p) **p++ = NULL;
182 /* Exactly what gets set depends on whether there is one or more addresses, and
183 what they contain. These first ones are always set, taking their values from
184 the first address. */
186 if (!addr->host_list)
188 deliver_host = deliver_host_address = US"";
189 deliver_host_port = 0;
193 deliver_host = addr->host_list->name;
194 deliver_host_address = addr->host_list->address;
195 deliver_host_port = addr->host_list->port;
198 deliver_recipients = addr;
199 deliver_address_data = addr->prop.address_data;
200 deliver_domain_data = addr->prop.domain_data;
201 deliver_localpart_data = addr->prop.localpart_data;
202 router_var = addr->prop.variables;
204 /* These may be unset for multiple addresses */
206 deliver_domain = addr->domain;
207 self_hostname = addr->self_hostname;
209 #ifdef EXPERIMENTAL_BRIGHTMAIL
210 bmi_deliver = 1; /* deliver by default */
211 bmi_alt_location = NULL;
212 bmi_base64_verdict = NULL;
213 bmi_base64_tracker_verdict = NULL;
216 /* If there's only one address we can set everything. */
220 address_item *addr_orig;
222 deliver_localpart = addr->local_part;
223 deliver_localpart_prefix = addr->prefix;
224 deliver_localpart_prefix_v = addr->prefix_v;
225 deliver_localpart_suffix = addr->suffix;
226 deliver_localpart_suffix_v = addr->suffix_v;
228 for (addr_orig = addr; addr_orig->parent; addr_orig = addr_orig->parent) ;
229 deliver_domain_orig = addr_orig->domain;
231 /* Re-instate any prefix and suffix in the original local part. In all
232 normal cases, the address will have a router associated with it, and we can
233 choose the caseful or caseless version accordingly. However, when a system
234 filter sets up a pipe, file, or autoreply delivery, no router is involved.
235 In this case, though, there won't be any prefix or suffix to worry about. */
237 deliver_localpart_orig = !addr_orig->router
238 ? addr_orig->local_part
239 : addr_orig->router->caseful_local_part
240 ? addr_orig->cc_local_part
241 : addr_orig->lc_local_part;
243 /* If there's a parent, make its domain and local part available, and if
244 delivering to a pipe or file, or sending an autoreply, get the local
245 part from the parent. For pipes and files, put the pipe or file string
246 into address_pipe and address_file. */
250 deliver_domain_parent = addr->parent->domain;
251 deliver_localpart_parent = !addr->parent->router
252 ? addr->parent->local_part
253 : addr->parent->router->caseful_local_part
254 ? addr->parent->cc_local_part
255 : addr->parent->lc_local_part;
257 /* File deliveries have their own flag because they need to be picked out
258 as special more often. */
260 if (testflag(addr, af_pfr))
262 if (testflag(addr, af_file)) address_file = addr->local_part;
263 else if (deliver_localpart[0] == '|') address_pipe = addr->local_part;
264 deliver_localpart = addr->parent->local_part;
265 deliver_localpart_prefix = addr->parent->prefix;
266 deliver_localpart_prefix_v = addr->parent->prefix_v;
267 deliver_localpart_suffix = addr->parent->suffix;
268 deliver_localpart_suffix_v = addr->parent->suffix_v;
272 #ifdef EXPERIMENTAL_BRIGHTMAIL
273 /* Set expansion variables related to Brightmail AntiSpam */
274 bmi_base64_verdict = bmi_get_base64_verdict(deliver_localpart_orig, deliver_domain_orig);
275 bmi_base64_tracker_verdict = bmi_get_base64_tracker_verdict(bmi_base64_verdict);
276 /* get message delivery status (0 - don't deliver | 1 - deliver) */
277 bmi_deliver = bmi_get_delivery_status(bmi_base64_verdict);
278 /* if message is to be delivered, get eventual alternate location */
279 if (bmi_deliver == 1)
280 bmi_alt_location = bmi_get_alt_location(bmi_base64_verdict);
285 /* For multiple addresses, don't set local part, and leave the domain and
286 self_hostname set only if it is the same for all of them. It is possible to
287 have multiple pipe and file addresses, but only when all addresses have routed
288 to the same pipe or file. */
292 if (testflag(addr, af_pfr))
294 if (testflag(addr, af_file)) address_file = addr->local_part;
295 else if (addr->local_part[0] == '|') address_pipe = addr->local_part;
297 for (address_item * addr2 = addr->next; addr2; addr2 = addr2->next)
299 if (deliver_domain && Ustrcmp(deliver_domain, addr2->domain) != 0)
300 deliver_domain = NULL;
302 && ( !addr2->self_hostname
303 || Ustrcmp(self_hostname, addr2->self_hostname) != 0
305 self_hostname = NULL;
306 if (!deliver_domain && !self_hostname) break;
314 /*************************************************
315 * Open a msglog file *
316 *************************************************/
318 /* This function is used both for normal message logs, and for files in the
319 msglog directory that are used to catch output from pipes. Try to create the
320 directory if it does not exist. From release 4.21, normal message logs should
321 be created when the message is received.
323 Called from deliver_message(), can be operating as root.
326 filename the file name
327 mode the mode required
328 error used for saying what failed
330 Returns: a file descriptor, or -1 (with errno set)
334 open_msglog_file(uschar *filename, int mode, uschar **error)
336 if (Ustrstr(filename, US"/../"))
337 log_write(0, LOG_MAIN|LOG_PANIC,
338 "Attempt to open msglog file path with upward-traversal: '%s'\n", filename);
340 for (int i = 2; i > 0; i--)
342 int fd = Uopen(filename,
349 O_WRONLY|O_APPEND|O_CREAT, mode);
352 /* Set the close-on-exec flag and change the owner to the exim uid/gid (this
353 function is called as root). Double check the mode, because the group setting
354 doesn't always get set automatically. */
357 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
359 if (exim_fchown(fd, exim_uid, exim_gid, filename) < 0)
364 if (fchmod(fd, mode) < 0)
374 (void)directory_make(spool_directory,
375 spool_sname(US"msglog", message_subdir),
376 MSGLOG_DIRECTORY_MODE, TRUE);
379 *error = US"create or open";
386 /*************************************************
387 * Write to msglog if required *
388 *************************************************/
390 /* Write to the message log, if configured. This function may also be called
394 format a string format
400 deliver_msglog(const char *format, ...)
403 if (!message_logs) return;
404 va_start(ap, format);
405 vfprintf(message_log, format, ap);
413 /*************************************************
414 * Replicate status for batch *
415 *************************************************/
417 /* When a transport handles a batch of addresses, it may treat them
418 individually, or it may just put the status in the first one, and return FALSE,
419 requesting that the status be copied to all the others externally. This is the
420 replication function. As well as the status, it copies the transport pointer,
421 which may have changed if appendfile passed the addresses on to a different
424 Argument: pointer to the first address in a chain
429 replicate_status(address_item *addr)
431 for (address_item * addr2 = addr->next; addr2; addr2 = addr2->next)
433 addr2->transport = addr->transport;
434 addr2->transport_return = addr->transport_return;
435 addr2->basic_errno = addr->basic_errno;
436 addr2->more_errno = addr->more_errno;
437 addr2->delivery_time = addr->delivery_time;
438 addr2->special_action = addr->special_action;
439 addr2->message = addr->message;
440 addr2->user_message = addr->user_message;
446 /*************************************************
447 * Compare lists of hosts *
448 *************************************************/
450 /* This function is given two pointers to chains of host items, and it yields
451 TRUE if the lists refer to the same hosts in the same order, except that
453 (1) Multiple hosts with the same non-negative MX values are permitted to appear
454 in different orders. Round-robinning nameservers can cause this to happen.
456 (2) Multiple hosts with the same negative MX values less than MX_NONE are also
457 permitted to appear in different orders. This is caused by randomizing
460 This enables Exim to use a single SMTP transaction for sending to two entirely
461 different domains that happen to end up pointing at the same hosts.
463 We do not try to batch up different A-record host names that refer to the
467 one points to the first host list
468 two points to the second host list
470 Returns: TRUE if the lists refer to the same host set
474 same_hosts(host_item *one, host_item *two)
478 if (Ustrcmp(one->name, two->name) != 0)
481 host_item *end_one = one;
482 host_item *end_two = two;
484 /* Batch up only if there was no MX and the list was not randomized */
486 if (mx == MX_NONE) return FALSE;
488 /* Find the ends of the shortest sequence of identical MX values */
490 while ( end_one->next && end_one->next->mx == mx
491 && end_two->next && end_two->next->mx == mx)
493 end_one = end_one->next;
494 end_two = end_two->next;
497 /* If there aren't any duplicates, there's no match. */
499 if (end_one == one) return FALSE;
501 /* For each host in the 'one' sequence, check that it appears in the 'two'
502 sequence, returning FALSE if not. */
507 for (hi = two; hi != end_two->next; hi = hi->next)
508 if (Ustrcmp(one->name, hi->name) == 0) break;
509 if (hi == end_two->next) return FALSE;
510 if (one == end_one) break;
514 /* All the hosts in the 'one' sequence were found in the 'two' sequence.
515 Ensure both are pointing at the last host, and carry on as for equality. */
520 /* if the names matched but ports do not, mismatch */
521 else if (one->port != two->port)
530 /* True if both are NULL */
537 /*************************************************
538 * Compare header lines *
539 *************************************************/
541 /* This function is given two pointers to chains of header items, and it yields
542 TRUE if they are the same header texts in the same order.
545 one points to the first header list
546 two points to the second header list
548 Returns: TRUE if the lists refer to the same header set
552 same_headers(header_line *one, header_line *two)
554 for (;; one = one->next, two = two->next)
556 if (one == two) return TRUE; /* Includes the case where both NULL */
557 if (!one || !two) return FALSE;
558 if (Ustrcmp(one->text, two->text) != 0) return FALSE;
564 /*************************************************
565 * Compare string settings *
566 *************************************************/
568 /* This function is given two pointers to strings, and it returns
569 TRUE if they are the same pointer, or if the two strings are the same.
572 one points to the first string
573 two points to the second string
575 Returns: TRUE or FALSE
579 same_strings(uschar *one, uschar *two)
581 if (one == two) return TRUE; /* Includes the case where both NULL */
582 if (!one || !two) return FALSE;
583 return (Ustrcmp(one, two) == 0);
588 /*************************************************
589 * Compare uid/gid for addresses *
590 *************************************************/
592 /* This function is given a transport and two addresses. It yields TRUE if the
593 uid/gid/initgroups settings for the two addresses are going to be the same when
598 addr1 the first address
599 addr2 the second address
601 Returns: TRUE or FALSE
605 same_ugid(transport_instance *tp, address_item *addr1, address_item *addr2)
607 if ( !tp->uid_set && !tp->expand_uid
608 && !tp->deliver_as_creator
609 && ( testflag(addr1, af_uid_set) != testflag(addr2, af_gid_set)
610 || ( testflag(addr1, af_uid_set)
611 && ( addr1->uid != addr2->uid
612 || testflag(addr1, af_initgroups) != testflag(addr2, af_initgroups)
616 if ( !tp->gid_set && !tp->expand_gid
617 && ( testflag(addr1, af_gid_set) != testflag(addr2, af_gid_set)
618 || ( testflag(addr1, af_gid_set)
619 && addr1->gid != addr2->gid
629 /*************************************************
630 * Record that an address is complete *
631 *************************************************/
633 /* This function records that an address is complete. This is straightforward
634 for most addresses, where the unique address is just the full address with the
635 domain lower cased. For homonyms (addresses that are the same as one of their
636 ancestors) their are complications. Their unique addresses have \x\ prepended
637 (where x = 0, 1, 2...), so that de-duplication works correctly for siblings and
640 Exim used to record the unique addresses of homonyms as "complete". This,
641 however, fails when the pattern of redirection varies over time (e.g. if taking
642 unseen copies at only some times of day) because the prepended numbers may vary
643 from one delivery run to the next. This problem is solved by never recording
644 prepended unique addresses as complete. Instead, when a homonymic address has
645 actually been delivered via a transport, we record its basic unique address
646 followed by the name of the transport. This is checked in subsequent delivery
647 runs whenever an address is routed to a transport.
649 If the completed address is a top-level one (has no parent, which means it
650 cannot be homonymic) we also add the original address to the non-recipients
651 tree, so that it gets recorded in the spool file and therefore appears as
652 "done" in any spool listings. The original address may differ from the unique
653 address in the case of the domain.
655 Finally, this function scans the list of duplicates, marks as done any that
656 match this address, and calls child_done() for their ancestors.
659 addr address item that has been completed
660 now current time as a string
666 address_done(address_item *addr, uschar *now)
668 update_spool = TRUE; /* Ensure spool gets updated */
670 /* Top-level address */
674 tree_add_nonrecipient(addr->unique);
675 tree_add_nonrecipient(addr->address);
678 /* Homonymous child address */
680 else if (testflag(addr, af_homonym))
683 tree_add_nonrecipient(
684 string_sprintf("%s/%s", addr->unique + 3, addr->transport->name));
687 /* Non-homonymous child address */
689 else tree_add_nonrecipient(addr->unique);
691 /* Check the list of duplicate addresses and ensure they are now marked
694 for (address_item * dup = addr_duplicate; dup; dup = dup->next)
695 if (Ustrcmp(addr->unique, dup->unique) == 0)
697 tree_add_nonrecipient(dup->unique);
698 child_done(dup, now);
705 /*************************************************
706 * Decrease counts in parents and mark done *
707 *************************************************/
709 /* This function is called when an address is complete. If there is a parent
710 address, its count of children is decremented. If there are still other
711 children outstanding, the function exits. Otherwise, if the count has become
712 zero, address_done() is called to mark the parent and its duplicates complete.
713 Then loop for any earlier ancestors.
716 addr points to the completed address item
717 now the current time as a string, for writing to the message log
723 child_done(address_item *addr, uschar *now)
730 if (--addr->child_count > 0) return; /* Incomplete parent */
731 address_done(addr, now);
733 /* Log the completion of all descendents only when there is no ancestor with
734 the same original address. */
736 for (aa = addr->parent; aa; aa = aa->parent)
737 if (Ustrcmp(aa->address, addr->address) == 0) break;
740 deliver_msglog("%s %s: children all complete\n", now, addr->address);
741 DEBUG(D_deliver) debug_printf("%s: children all complete\n", addr->address);
747 /*************************************************
748 * Delivery logging support functions *
749 *************************************************/
751 /* The LOGGING() checks in d_log_interface() are complicated for backwards
752 compatibility. When outgoing interface logging was originally added, it was
753 conditional on just incoming_interface (which is off by default). The
754 outgoing_interface option is on by default to preserve this behaviour, but
755 you can enable incoming_interface and disable outgoing_interface to get I=
756 fields on incoming lines only.
760 addr The address to be logged
762 Returns: New value for s
766 d_log_interface(gstring * g)
768 if (LOGGING(incoming_interface) && LOGGING(outgoing_interface)
769 && sending_ip_address)
771 g = string_fmt_append(g, " I=[%s]", sending_ip_address);
772 if (LOGGING(outgoing_port))
773 g = string_fmt_append(g, ":%d", sending_port);
781 d_hostlog(gstring * g, address_item * addr)
783 host_item * h = addr->host_used;
785 g = string_append(g, 2, US" H=", h->name);
787 if (LOGGING(dnssec) && h->dnssec == DS_YES)
788 g = string_catn(g, US" DS", 3);
790 g = string_append(g, 3, US" [", h->address, US"]");
792 if (LOGGING(outgoing_port))
793 g = string_fmt_append(g, ":%d", h->port);
796 if (LOGGING(proxy) && proxy_local_address)
798 g = string_append(g, 3, US" PRX=[", proxy_local_address, US"]");
799 if (LOGGING(outgoing_port))
800 g = string_fmt_append(g, ":%d", proxy_local_port);
804 g = d_log_interface(g);
806 if (testflag(addr, af_tcp_fastopen))
807 g = string_catn(g, US" TFO*", testflag(addr, af_tcp_fastopen_data) ? 5 : 4);
818 d_tlslog(gstring * g, address_item * addr)
820 if (LOGGING(tls_cipher) && addr->cipher)
822 g = string_append(g, 2, US" X=", addr->cipher);
823 #ifdef EXPERIMENTAL_TLS_RESUME
824 if (LOGGING(tls_resumption) && testflag(addr, af_tls_resume))
825 g = string_catn(g, US"*", 1);
828 if (LOGGING(tls_certificate_verified) && addr->cipher)
829 g = string_append(g, 2, US" CV=",
830 testflag(addr, af_cert_verified)
833 testflag(addr, af_dane_verified)
839 if (LOGGING(tls_peerdn) && addr->peerdn)
840 g = string_append(g, 3, US" DN=\"", string_printing(addr->peerdn), US"\"");
848 #ifndef DISABLE_EVENT
850 event_raise(uschar * action, const uschar * event, uschar * ev_data)
856 debug_printf("Event(%s): event_action=|%s| delivery_IP=%s\n",
858 action, deliver_host_address);
861 event_data = ev_data;
863 if (!(s = expand_string(action)) && *expand_string_message)
864 log_write(0, LOG_MAIN|LOG_PANIC,
865 "failed to expand event_action %s in %s: %s\n",
866 event, transport_name ? transport_name : US"main", expand_string_message);
868 event_name = event_data = NULL;
870 /* If the expansion returns anything but an empty string, flag for
871 the caller to modify his normal processing
876 debug_printf("Event(%s): event_action returned \"%s\"\n", event, s);
885 msg_event_raise(const uschar * event, const address_item * addr)
887 const uschar * save_domain = deliver_domain;
888 uschar * save_local = deliver_localpart;
889 const uschar * save_host = deliver_host;
890 const uschar * save_address = deliver_host_address;
891 const int save_port = deliver_host_port;
893 router_name = addr->router ? addr->router->name : NULL;
894 deliver_domain = addr->domain;
895 deliver_localpart = addr->local_part;
896 deliver_host = addr->host_used ? addr->host_used->name : NULL;
898 if (!addr->transport)
900 if (Ustrcmp(event, "msg:fail:delivery") == 0)
902 /* An address failed with no transport involved. This happens when
903 a filter was used which triggered a fail command (in such a case
904 a transport isn't needed). Convert it to an internal fail event. */
906 (void) event_raise(event_action, US"msg:fail:internal", addr->message);
911 transport_name = addr->transport->name;
913 (void) event_raise(addr->transport->event_action, event,
915 || Ustrcmp(addr->transport->driver_name, "smtp") == 0
916 || Ustrcmp(addr->transport->driver_name, "lmtp") == 0
917 || Ustrcmp(addr->transport->driver_name, "autoreply") == 0
918 ? addr->message : NULL);
921 deliver_host_port = save_port;
922 deliver_host_address = save_address;
923 deliver_host = save_host;
924 deliver_localpart = save_local;
925 deliver_domain = save_domain;
926 router_name = transport_name = NULL;
928 #endif /*DISABLE_EVENT*/
932 /******************************************************************************/
935 /*************************************************
936 * Generate local prt for logging *
937 *************************************************/
939 /* This function is a subroutine for use in string_log_address() below.
942 addr the address being logged
943 yield the current dynamic buffer pointer
945 Returns: the new value of the buffer pointer
949 string_get_localpart(address_item * addr, gstring * yield)
954 if (testflag(addr, af_include_affixes) && s)
957 if (testflag(addr, af_utf8_downcvt))
958 s = string_localpart_utf8_to_alabel(s, NULL);
960 yield = string_cat(yield, s);
963 s = addr->local_part;
965 if (testflag(addr, af_utf8_downcvt))
966 s = string_localpart_utf8_to_alabel(s, NULL);
968 yield = string_cat(yield, s);
971 if (testflag(addr, af_include_affixes) && s)
974 if (testflag(addr, af_utf8_downcvt))
975 s = string_localpart_utf8_to_alabel(s, NULL);
977 yield = string_cat(yield, s);
984 /*************************************************
985 * Generate log address list *
986 *************************************************/
988 /* This function generates a list consisting of an address and its parents, for
989 use in logging lines. For saved onetime aliased addresses, the onetime parent
990 field is used. If the address was delivered by a transport with rcpt_include_
991 affixes set, the af_include_affixes bit will be set in the address. In that
992 case, we include the affixes here too.
995 g points to growing-string struct
996 addr bottom (ultimate) address
997 all_parents if TRUE, include all parents
998 success TRUE for successful delivery
1000 Returns: a growable string in dynamic store
1004 string_log_address(gstring * g,
1005 address_item *addr, BOOL all_parents, BOOL success)
1007 BOOL add_topaddr = TRUE;
1008 address_item *topaddr;
1010 /* Find the ultimate parent */
1012 for (topaddr = addr; topaddr->parent; topaddr = topaddr->parent) ;
1014 /* We start with just the local part for pipe, file, and reply deliveries, and
1015 for successful local deliveries from routers that have the log_as_local flag
1016 set. File deliveries from filters can be specified as non-absolute paths in
1017 cases where the transport is going to complete the path. If there is an error
1018 before this happens (expansion failure) the local part will not be updated, and
1019 so won't necessarily look like a path. Add extra text for this case. */
1021 if ( testflag(addr, af_pfr)
1023 && addr->router && addr->router->log_as_local
1024 && addr->transport && addr->transport->info->local
1027 if (testflag(addr, af_file) && addr->local_part[0] != '/')
1028 g = string_catn(g, CUS"save ", 5);
1029 g = string_get_localpart(addr, g);
1032 /* Other deliveries start with the full address. It we have split it into local
1033 part and domain, use those fields. Some early failures can happen before the
1034 splitting is done; in those cases use the original field. */
1039 int off = g->ptr; /* start of the "full address" */
1041 if (addr->local_part)
1044 g = string_get_localpart(addr, g);
1045 g = string_catn(g, US"@", 1);
1048 if (testflag(addr, af_utf8_downcvt))
1049 s = string_localpart_utf8_to_alabel(s, NULL);
1051 g = string_cat(g, s);
1054 g = string_cat(g, addr->address);
1056 /* If the address we are going to print is the same as the top address,
1057 and all parents are not being included, don't add on the top address. First
1058 of all, do a caseless comparison; if this succeeds, do a caseful comparison
1059 on the local parts. */
1061 cmp = g->s + off; /* only now, as rebuffer likely done */
1062 string_from_gstring(g); /* ensure nul-terminated */
1063 if ( strcmpic(cmp, topaddr->address) == 0
1064 && Ustrncmp(cmp, topaddr->address, Ustrchr(cmp, '@') - cmp) == 0
1065 && !addr->onetime_parent
1066 && (!all_parents || !addr->parent || addr->parent == topaddr)
1068 add_topaddr = FALSE;
1071 /* If all parents are requested, or this is a local pipe/file/reply, and
1072 there is at least one intermediate parent, show it in brackets, and continue
1073 with all of them if all are wanted. */
1075 if ( (all_parents || testflag(addr, af_pfr))
1077 && addr->parent != topaddr)
1080 for (address_item * addr2 = addr->parent; addr2 != topaddr; addr2 = addr2->parent)
1082 g = string_catn(g, s, 2);
1083 g = string_cat (g, addr2->address);
1084 if (!all_parents) break;
1087 g = string_catn(g, US")", 1);
1090 /* Add the top address if it is required */
1093 g = string_append(g, 3,
1095 addr->onetime_parent ? addr->onetime_parent : topaddr->address,
1103 /******************************************************************************/
1107 /* If msg is NULL this is a delivery log and logchar is used. Otherwise
1108 this is a nonstandard call; no two-character delivery flag is written
1109 but sender-host and sender are prefixed and "msg" is inserted in the log line.
1112 flags passed to log_write()
1115 delivery_log(int flags, address_item * addr, int logchar, uschar * msg)
1117 gstring * g; /* Used for a temporary, expanding buffer, for building log lines */
1120 /* Log the delivery on the main log. We use an extensible string to build up
1121 the log line, and reset the store afterwards. Remote deliveries should always
1122 have a pointer to the host item that succeeded; local deliveries can have a
1123 pointer to a single host item in their host list, for use by the transport. */
1125 #ifndef DISABLE_EVENT
1126 /* presume no successful remote delivery */
1127 lookup_dnssec_authenticated = NULL;
1130 reset_point = store_mark();
1131 g = string_get_tainted(256, TRUE); /* addrs will be tainted, so avoid copy */
1134 g = string_append(g, 2, host_and_ident(TRUE), US" ");
1137 g->s[0] = logchar; g->ptr = 1;
1138 g = string_catn(g, US"> ", 2);
1140 g = string_log_address(g, addr, LOGGING(all_parents), TRUE);
1142 if (LOGGING(sender_on_delivery) || msg)
1143 g = string_append(g, 3, US" F=<",
1145 testflag(addr, af_utf8_downcvt)
1146 ? string_address_utf8_to_alabel(sender_address, NULL)
1153 g = string_append(g, 2, US" Q=", queue_name);
1155 #ifdef EXPERIMENTAL_SRS
1156 if(addr->prop.srs_sender)
1157 g = string_append(g, 3, US" SRS=<", addr->prop.srs_sender, US">");
1160 /* You might think that the return path must always be set for a successful
1161 delivery; indeed, I did for some time, until this statement crashed. The case
1162 when it is not set is for a delivery to /dev/null which is optimised by not
1163 being run at all. */
1165 if (used_return_path && LOGGING(return_path_on_delivery))
1166 g = string_append(g, 3, US" P=<", used_return_path, US">");
1169 g = string_append(g, 2, US" ", msg);
1171 /* For a delivery from a system filter, there may not be a router */
1173 g = string_append(g, 2, US" R=", addr->router->name);
1175 g = string_append(g, 2, US" T=", addr->transport->name);
1177 if (LOGGING(delivery_size))
1178 g = string_fmt_append(g, " S=%d", transport_count);
1180 /* Local delivery */
1182 if (addr->transport->info->local)
1184 if (addr->host_list)
1185 g = string_append(g, 2, US" H=", addr->host_list->name);
1186 g = d_log_interface(g);
1187 if (addr->shadow_message)
1188 g = string_cat(g, addr->shadow_message);
1191 /* Remote delivery */
1195 if (addr->host_used)
1197 g = d_hostlog(g, addr);
1198 if (continue_sequence > 1)
1199 g = string_catn(g, US"*", 1);
1201 #ifndef DISABLE_EVENT
1202 deliver_host_address = addr->host_used->address;
1203 deliver_host_port = addr->host_used->port;
1204 deliver_host = addr->host_used->name;
1206 /* DNS lookup status */
1207 lookup_dnssec_authenticated = addr->host_used->dnssec==DS_YES ? US"yes"
1208 : addr->host_used->dnssec==DS_NO ? US"no"
1214 g = d_tlslog(g, addr);
1217 if (addr->authenticator)
1219 g = string_append(g, 2, US" A=", addr->authenticator);
1222 g = string_append(g, 2, US":", addr->auth_id);
1223 if (LOGGING(smtp_mailauth) && addr->auth_sndr)
1224 g = string_append(g, 2, US":", addr->auth_sndr);
1228 if (LOGGING(pipelining))
1230 if (testflag(addr, af_pipelining))
1231 g = string_catn(g, US" L", 2);
1232 #ifndef DISABLE_PIPE_CONNECT
1233 if (testflag(addr, af_early_pipe))
1234 g = string_catn(g, US"*", 1);
1238 #ifndef DISABLE_PRDR
1239 if (testflag(addr, af_prdr_used))
1240 g = string_catn(g, US" PRDR", 5);
1243 if (testflag(addr, af_chunking_used))
1244 g = string_catn(g, US" K", 2);
1247 /* confirmation message (SMTP (host_used) and LMTP (driver_name)) */
1249 if ( LOGGING(smtp_confirmation)
1251 && (addr->host_used || Ustrcmp(addr->transport->driver_name, "lmtp") == 0)
1254 unsigned lim = big_buffer_size < 1024 ? big_buffer_size : 1024;
1255 uschar *p = big_buffer;
1256 uschar *ss = addr->message;
1258 for (int i = 0; i < lim && ss[i] != 0; i++) /* limit logged amount */
1260 if (ss[i] == '\"' || ss[i] == '\\') *p++ = '\\'; /* quote \ and " */
1265 g = string_append(g, 2, US" C=", big_buffer);
1268 /* Time on queue and actual time taken to deliver */
1270 if (LOGGING(queue_time))
1271 g = string_append(g, 2, US" QT=",
1272 string_timesince(&received_time));
1274 if (LOGGING(deliver_time))
1275 g = string_append(g, 2, US" DT=", string_timediff(&addr->delivery_time));
1277 /* string_cat() always leaves room for the terminator. Release the
1278 store we used to build the line after writing it. */
1280 log_write(0, flags, "%s", string_from_gstring(g));
1282 #ifndef DISABLE_EVENT
1283 if (!msg) msg_event_raise(US"msg:delivery", addr);
1286 store_reset(reset_point);
1293 deferral_log(address_item * addr, uschar * now,
1294 int logflags, uschar * driver_name, uschar * driver_kind)
1296 rmark reset_point = store_mark();
1297 gstring * g = string_get(256);
1299 /* Build up the line that is used for both the message log and the main
1302 /* Create the address string for logging. Must not do this earlier, because
1303 an OK result may be changed to FAIL when a pipe returns text. */
1305 g = string_log_address(g, addr, LOGGING(all_parents), FALSE);
1308 g = string_append(g, 2, US" Q=", queue_name);
1310 /* Either driver_name contains something and driver_kind contains
1311 " router" or " transport" (note the leading space), or driver_name is
1312 a null string and driver_kind contains "routing" without the leading
1313 space, if all routing has been deferred. When a domain has been held,
1314 so nothing has been done at all, both variables contain null strings. */
1318 if (driver_kind[1] == 't' && addr->router)
1319 g = string_append(g, 2, US" R=", addr->router->name);
1320 g = string_fmt_append(g, " %c=%s", toupper(driver_kind[1]), driver_name);
1322 else if (driver_kind)
1323 g = string_append(g, 2, US" ", driver_kind);
1325 g = string_fmt_append(g, " defer (%d)", addr->basic_errno);
1327 if (addr->basic_errno > 0)
1328 g = string_append(g, 2, US": ",
1329 US strerror(addr->basic_errno));
1331 if (addr->host_used)
1333 g = string_append(g, 5,
1334 US" H=", addr->host_used->name,
1335 US" [", addr->host_used->address, US"]");
1336 if (LOGGING(outgoing_port))
1338 int port = addr->host_used->port;
1339 g = string_fmt_append(g, ":%d", port == PORT_NONE ? 25 : port);
1343 if (LOGGING(deliver_time))
1344 g = string_append(g, 2, US" DT=", string_timediff(&addr->delivery_time));
1347 g = string_append(g, 2, US": ", addr->message);
1349 (void) string_from_gstring(g);
1351 /* Log the deferment in the message log, but don't clutter it
1352 up with retry-time defers after the first delivery attempt. */
1354 if (f.deliver_firsttime || addr->basic_errno > ERRNO_RETRY_BASE)
1355 deliver_msglog("%s %s\n", now, g->s);
1357 /* Write the main log and reset the store.
1358 For errors of the type "retry time not reached" (also remotes skipped
1359 on queue run), logging is controlled by L_retry_defer. Note that this kind
1360 of error number is negative, and all the retry ones are less than any
1364 log_write(addr->basic_errno <= ERRNO_RETRY_BASE ? L_retry_defer : 0, logflags,
1367 store_reset(reset_point);
1374 failure_log(address_item * addr, uschar * driver_kind, uschar * now)
1376 rmark reset_point = store_mark();
1377 gstring * g = string_get(256);
1379 #ifndef DISABLE_EVENT
1380 /* Message failures for which we will send a DSN get their event raised
1381 later so avoid doing it here. */
1383 if ( !addr->prop.ignore_error
1384 && !(addr->dsn_flags & (rf_dsnflags & ~rf_notify_failure))
1386 msg_event_raise(US"msg:fail:delivery", addr);
1389 /* Build up the log line for the message and main logs */
1391 /* Create the address string for logging. Must not do this earlier, because
1392 an OK result may be changed to FAIL when a pipe returns text. */
1394 g = string_log_address(g, addr, LOGGING(all_parents), FALSE);
1396 if (LOGGING(sender_on_delivery))
1397 g = string_append(g, 3, US" F=<", sender_address, US">");
1400 g = string_append(g, 2, US" Q=", queue_name);
1402 /* Return path may not be set if no delivery actually happened */
1404 if (used_return_path && LOGGING(return_path_on_delivery))
1405 g = string_append(g, 3, US" P=<", used_return_path, US">");
1408 g = string_append(g, 2, US" R=", addr->router->name);
1409 if (addr->transport)
1410 g = string_append(g, 2, US" T=", addr->transport->name);
1412 if (addr->host_used)
1413 g = d_hostlog(g, addr);
1416 g = d_tlslog(g, addr);
1419 if (addr->basic_errno > 0)
1420 g = string_append(g, 2, US": ", US strerror(addr->basic_errno));
1423 g = string_append(g, 2, US": ", addr->message);
1425 if (LOGGING(deliver_time))
1426 g = string_append(g, 2, US" DT=", string_timediff(&addr->delivery_time));
1428 (void) string_from_gstring(g);
1430 /* Do the logging. For the message log, "routing failed" for those cases,
1431 just to make it clearer. */
1434 deliver_msglog("%s %s failed for %s\n", now, driver_kind, g->s);
1436 deliver_msglog("%s %s\n", now, g->s);
1438 log_write(0, LOG_MAIN, "** %s", g->s);
1440 store_reset(reset_point);
1446 /*************************************************
1447 * Actions at the end of handling an address *
1448 *************************************************/
1450 /* This is a function for processing a single address when all that can be done
1451 with it has been done.
1454 addr points to the address block
1455 result the result of the delivery attempt
1456 logflags flags for log_write() (LOG_MAIN and/or LOG_PANIC)
1457 driver_type indicates which type of driver (transport, or router) was last
1458 to process the address
1459 logchar '=' or '-' for use when logging deliveries with => or ->
1465 post_process_one(address_item *addr, int result, int logflags, int driver_type,
1468 uschar *now = tod_stamp(tod_log);
1469 uschar *driver_kind = NULL;
1470 uschar *driver_name = NULL;
1472 DEBUG(D_deliver) debug_printf("post-process %s (%d)\n", addr->address, result);
1474 /* Set up driver kind and name for logging. Disable logging if the router or
1475 transport has disabled it. */
1477 if (driver_type == EXIM_DTYPE_TRANSPORT)
1479 if (addr->transport)
1481 driver_name = addr->transport->name;
1482 driver_kind = US" transport";
1483 f.disable_logging = addr->transport->disable_logging;
1485 else driver_kind = US"transporting";
1487 else if (driver_type == EXIM_DTYPE_ROUTER)
1491 driver_name = addr->router->name;
1492 driver_kind = US" router";
1493 f.disable_logging = addr->router->disable_logging;
1495 else driver_kind = US"routing";
1498 /* If there's an error message set, ensure that it contains only printing
1499 characters - it should, but occasionally things slip in and this at least
1500 stops the log format from getting wrecked. We also scan the message for an LDAP
1501 expansion item that has a password setting, and flatten the password. This is a
1502 fudge, but I don't know a cleaner way of doing this. (If the item is badly
1503 malformed, it won't ever have gone near LDAP.) */
1507 const uschar * s = string_printing(addr->message);
1509 /* deconst cast ok as string_printing known to have alloc'n'copied */
1510 addr->message = expand_hide_passwords(US s);
1513 /* If we used a transport that has one of the "return_output" options set, and
1514 if it did in fact generate some output, then for return_output we treat the
1515 message as failed if it was not already set that way, so that the output gets
1516 returned to the sender, provided there is a sender to send it to. For
1517 return_fail_output, do this only if the delivery failed. Otherwise we just
1518 unlink the file, and remove the name so that if the delivery failed, we don't
1519 try to send back an empty or unwanted file. The log_output options operate only
1520 on a non-empty file.
1522 In any case, we close the message file, because we cannot afford to leave a
1523 file-descriptor for one address while processing (maybe very many) others. */
1525 if (addr->return_file >= 0 && addr->return_filename)
1527 BOOL return_output = FALSE;
1528 struct stat statbuf;
1529 (void)EXIMfsync(addr->return_file);
1531 /* If there is no output, do nothing. */
1533 if (fstat(addr->return_file, &statbuf) == 0 && statbuf.st_size > 0)
1535 transport_instance *tb = addr->transport;
1537 /* Handle logging options */
1540 || result == FAIL && tb->log_fail_output
1541 || result == DEFER && tb->log_defer_output
1545 FILE *f = Ufopen(addr->return_filename, "rb");
1547 log_write(0, LOG_MAIN|LOG_PANIC, "failed to open %s to log output "
1548 "from %s transport: %s", addr->return_filename, tb->name,
1551 if ((s = US Ufgets(big_buffer, big_buffer_size, f)))
1553 uschar *p = big_buffer + Ustrlen(big_buffer);
1555 while (p > big_buffer && isspace(p[-1])) p--;
1557 sp = string_printing(big_buffer);
1558 log_write(0, LOG_MAIN, "<%s>: %s transport output: %s",
1559 addr->address, tb->name, sp);
1564 /* Handle returning options, but only if there is an address to return
1567 if (sender_address[0] != 0 || addr->prop.errors_address)
1568 if (tb->return_output)
1570 addr->transport_return = result = FAIL;
1571 if (addr->basic_errno == 0 && !addr->message)
1572 addr->message = US"return message generated";
1573 return_output = TRUE;
1576 if (tb->return_fail_output && result == FAIL) return_output = TRUE;
1579 /* Get rid of the file unless it might be returned, but close it in
1584 Uunlink(addr->return_filename);
1585 addr->return_filename = NULL;
1586 addr->return_file = -1;
1589 (void)close(addr->return_file);
1592 /* The success case happens only after delivery by a transport. */
1596 addr->next = addr_succeed;
1597 addr_succeed = addr;
1599 /* Call address_done() to ensure that we don't deliver to this address again,
1600 and write appropriate things to the message log. If it is a child address, we
1601 call child_done() to scan the ancestors and mark them complete if this is the
1602 last child to complete. */
1604 address_done(addr, now);
1605 DEBUG(D_deliver) debug_printf("%s delivered\n", addr->address);
1608 deliver_msglog("%s %s: %s%s succeeded\n", now, addr->address,
1609 driver_name, driver_kind);
1612 deliver_msglog("%s %s <%s>: %s%s succeeded\n", now, addr->address,
1613 addr->parent->address, driver_name, driver_kind);
1614 child_done(addr, now);
1617 /* Certificates for logging (via events) */
1619 tls_out.ourcert = addr->ourcert;
1620 addr->ourcert = NULL;
1621 tls_out.peercert = addr->peercert;
1622 addr->peercert = NULL;
1624 tls_out.ver = addr->tlsver;
1625 tls_out.cipher = addr->cipher;
1626 tls_out.peerdn = addr->peerdn;
1627 tls_out.ocsp = addr->ocsp;
1628 # ifdef SUPPORT_DANE
1629 tls_out.dane_verified = testflag(addr, af_dane_verified);
1633 delivery_log(LOG_MAIN, addr, logchar, NULL);
1636 tls_free_cert(&tls_out.ourcert);
1637 tls_free_cert(&tls_out.peercert);
1639 tls_out.cipher = NULL;
1640 tls_out.peerdn = NULL;
1641 tls_out.ocsp = OCSP_NOT_REQ;
1642 # ifdef SUPPORT_DANE
1643 tls_out.dane_verified = FALSE;
1649 /* Soft failure, or local delivery process failed; freezing may be
1652 else if (result == DEFER || result == PANIC)
1654 if (result == PANIC) logflags |= LOG_PANIC;
1656 /* This puts them on the chain in reverse order. Do not change this, because
1657 the code for handling retries assumes that the one with the retry
1658 information is last. */
1660 addr->next = addr_defer;
1663 /* The only currently implemented special action is to freeze the
1664 message. Logging of this is done later, just before the -H file is
1667 if (addr->special_action == SPECIAL_FREEZE)
1669 f.deliver_freeze = TRUE;
1670 deliver_frozen_at = time(NULL);
1671 update_spool = TRUE;
1674 /* If doing a 2-stage queue run, we skip writing to either the message
1675 log or the main log for SMTP defers. */
1677 if (!f.queue_2stage || addr->basic_errno != 0)
1678 deferral_log(addr, now, logflags, driver_name, driver_kind);
1682 /* Hard failure. If there is an address to which an error message can be sent,
1683 put this address on the failed list. If not, put it on the deferred list and
1684 freeze the mail message for human attention. The latter action can also be
1685 explicitly requested by a router or transport. */
1689 /* If this is a delivery error, or a message for which no replies are
1690 wanted, and the message's age is greater than ignore_bounce_errors_after,
1691 force the af_ignore_error flag. This will cause the address to be discarded
1692 later (with a log entry). */
1694 if (!*sender_address && message_age >= ignore_bounce_errors_after)
1695 addr->prop.ignore_error = TRUE;
1697 /* Freeze the message if requested, or if this is a bounce message (or other
1698 message with null sender) and this address does not have its own errors
1699 address. However, don't freeze if errors are being ignored. The actual code
1700 to ignore occurs later, instead of sending a message. Logging of freezing
1701 occurs later, just before writing the -H file. */
1703 if ( !addr->prop.ignore_error
1704 && ( addr->special_action == SPECIAL_FREEZE
1705 || (sender_address[0] == 0 && !addr->prop.errors_address)
1708 frozen_info = addr->special_action == SPECIAL_FREEZE
1710 : f.sender_local && !f.local_error_message
1711 ? US" (message created with -f <>)"
1712 : US" (delivery error message)";
1713 f.deliver_freeze = TRUE;
1714 deliver_frozen_at = time(NULL);
1715 update_spool = TRUE;
1717 /* The address is put on the defer rather than the failed queue, because
1718 the message is being retained. */
1720 addr->next = addr_defer;
1724 /* Don't put the address on the nonrecipients tree yet; wait until an
1725 error message has been successfully sent. */
1729 addr->next = addr_failed;
1733 failure_log(addr, driver_name ? NULL : driver_kind, now);
1736 /* Ensure logging is turned on again in all cases */
1738 f.disable_logging = FALSE;
1744 /*************************************************
1745 * Address-independent error *
1746 *************************************************/
1748 /* This function is called when there's an error that is not dependent on a
1749 particular address, such as an expansion string failure. It puts the error into
1750 all the addresses in a batch, logs the incident on the main and panic logs, and
1751 clears the expansions. It is mostly called from local_deliver(), but can be
1752 called for a remote delivery via findugid().
1755 logit TRUE if (MAIN+PANIC) logging required
1756 addr the first of the chain of addresses
1758 format format string for error message, or NULL if already set in addr
1759 ... arguments for the format
1765 common_error(BOOL logit, address_item *addr, int code, uschar *format, ...)
1767 addr->basic_errno = code;
1774 va_start(ap, format);
1775 g = string_vformat(NULL, SVFMT_EXTEND|SVFMT_REBUFFER, CS format, ap);
1777 addr->message = string_from_gstring(g);
1780 for (address_item * addr2 = addr->next; addr2; addr2 = addr2->next)
1782 addr2->basic_errno = code;
1783 addr2->message = addr->message;
1786 if (logit) log_write(0, LOG_MAIN|LOG_PANIC, "%s", addr->message);
1787 deliver_set_expansions(NULL);
1793 /*************************************************
1794 * Check a "never users" list *
1795 *************************************************/
1797 /* This function is called to check whether a uid is on one of the two "never
1801 uid the uid to be checked
1802 nusers the list to be scanned; the first item in the list is the count
1804 Returns: TRUE if the uid is on the list
1808 check_never_users(uid_t uid, uid_t *nusers)
1810 if (!nusers) return FALSE;
1811 for (int i = 1; i <= (int)(nusers[0]); i++) if (nusers[i] == uid) return TRUE;
1817 /*************************************************
1818 * Find uid and gid for a transport *
1819 *************************************************/
1821 /* This function is called for both local and remote deliveries, to find the
1822 uid/gid under which to run the delivery. The values are taken preferentially
1823 from the transport (either explicit or deliver_as_creator), then from the
1824 address (i.e. the router), and if nothing is set, the exim uid/gid are used. If
1825 the resulting uid is on the "never_users" or the "fixed_never_users" list, a
1826 panic error is logged, and the function fails (which normally leads to delivery
1830 addr the address (possibly a chain)
1832 uidp pointer to uid field
1833 gidp pointer to gid field
1834 igfp pointer to the use_initgroups field
1836 Returns: FALSE if failed - error has been set in address(es)
1840 findugid(address_item *addr, transport_instance *tp, uid_t *uidp, gid_t *gidp,
1844 BOOL gid_set = FALSE;
1846 /* Default initgroups flag comes from the transport */
1848 *igfp = tp->initgroups;
1850 /* First see if there's a gid on the transport, either fixed or expandable.
1851 The expanding function always logs failure itself. */
1858 else if (tp->expand_gid)
1860 if (!route_find_expanded_group(tp->expand_gid, tp->name, US"transport", gidp,
1863 common_error(FALSE, addr, ERRNO_GIDFAIL, NULL);
1869 /* If the transport did not set a group, see if the router did. */
1871 if (!gid_set && testflag(addr, af_gid_set))
1877 /* Pick up a uid from the transport if one is set. */
1879 if (tp->uid_set) *uidp = tp->uid;
1881 /* Otherwise, try for an expandable uid field. If it ends up as a numeric id,
1882 it does not provide a passwd value from which a gid can be taken. */
1884 else if (tp->expand_uid)
1887 if (!route_find_expanded_user(tp->expand_uid, tp->name, US"transport", &pw,
1888 uidp, &(addr->message)))
1890 common_error(FALSE, addr, ERRNO_UIDFAIL, NULL);
1900 /* If the transport doesn't set the uid, test the deliver_as_creator flag. */
1902 else if (tp->deliver_as_creator)
1904 *uidp = originator_uid;
1907 *gidp = originator_gid;
1912 /* Otherwise see if the address specifies the uid and if so, take it and its
1915 else if (testflag(addr, af_uid_set))
1918 *igfp = testflag(addr, af_initgroups);
1921 /* Nothing has specified the uid - default to the Exim user, and group if the
1934 /* If no gid is set, it is a disaster. We default to the Exim gid only if
1935 defaulting to the Exim uid. In other words, if the configuration has specified
1936 a uid, it must also provide a gid. */
1940 common_error(TRUE, addr, ERRNO_GIDFAIL, US"User set without group for "
1941 "%s transport", tp->name);
1945 /* Check that the uid is not on the lists of banned uids that may not be used
1946 for delivery processes. */
1948 nuname = check_never_users(*uidp, never_users)
1950 : check_never_users(*uidp, fixed_never_users)
1951 ? US"fixed_never_users"
1955 common_error(TRUE, addr, ERRNO_UIDFAIL, US"User %ld set for %s transport "
1956 "is on the %s list", (long int)(*uidp), tp->name, nuname);
1968 /*************************************************
1969 * Check the size of a message for a transport *
1970 *************************************************/
1972 /* Checks that the message isn't too big for the selected transport.
1973 This is called only when it is known that the limit is set.
1977 addr the (first) address being delivered
1980 DEFER expansion failed or did not yield an integer
1981 FAIL message too big
1985 check_message_size(transport_instance *tp, address_item *addr)
1990 deliver_set_expansions(addr);
1991 size_limit = expand_string_integer(tp->message_size_limit, TRUE);
1992 deliver_set_expansions(NULL);
1994 if (expand_string_message)
1997 addr->message = size_limit == -1
1998 ? string_sprintf("failed to expand message_size_limit "
1999 "in %s transport: %s", tp->name, expand_string_message)
2000 : string_sprintf("invalid message_size_limit "
2001 "in %s transport: %s", tp->name, expand_string_message);
2003 else if (size_limit > 0 && message_size > size_limit)
2007 string_sprintf("message is too big (transport limit = %d)",
2016 /*************************************************
2017 * Transport-time check for a previous delivery *
2018 *************************************************/
2020 /* Check that this base address hasn't previously been delivered to its routed
2021 transport. If it has been delivered, mark it done. The check is necessary at
2022 delivery time in order to handle homonymic addresses correctly in cases where
2023 the pattern of redirection changes between delivery attempts (so the unique
2024 fields change). Non-homonymic previous delivery is detected earlier, at routing
2025 time (which saves unnecessary routing).
2028 addr the address item
2029 testing TRUE if testing wanted only, without side effects
2031 Returns: TRUE if previously delivered by the transport
2035 previously_transported(address_item *addr, BOOL testing)
2037 uschar * s = string_sprintf("%s/%s",
2038 addr->unique + (testflag(addr, af_homonym)? 3:0), addr->transport->name);
2040 if (tree_search(tree_nonrecipients, s) != 0)
2042 DEBUG(D_deliver|D_route|D_transport)
2043 debug_printf("%s was previously delivered (%s transport): discarded\n",
2044 addr->address, addr->transport->name);
2045 if (!testing) child_done(addr, tod_stamp(tod_log));
2054 /******************************************************
2055 * Check for a given header in a header string *
2056 ******************************************************/
2058 /* This function is used when generating quota warnings. The configuration may
2059 specify any header lines it likes in quota_warn_message. If certain of them are
2060 missing, defaults are inserted, so we need to be able to test for the presence
2064 hdr the required header name
2065 hstring the header string
2067 Returns: TRUE the header is in the string
2068 FALSE the header is not in the string
2072 contains_header(uschar *hdr, uschar *hstring)
2074 int len = Ustrlen(hdr);
2075 uschar *p = hstring;
2078 if (strncmpic(p, hdr, len) == 0)
2081 while (*p == ' ' || *p == '\t') p++;
2082 if (*p == ':') return TRUE;
2084 while (*p != 0 && *p != '\n') p++;
2085 if (*p == '\n') p++;
2093 /*************************************************
2094 * Perform a local delivery *
2095 *************************************************/
2097 /* Each local delivery is performed in a separate process which sets its
2098 uid and gid as specified. This is a safer way than simply changing and
2099 restoring using seteuid(); there is a body of opinion that seteuid() cannot be
2100 used safely. From release 4, Exim no longer makes any use of it. Besides, not
2101 all systems have seteuid().
2103 If the uid/gid are specified in the transport_instance, they are used; the
2104 transport initialization must ensure that either both or neither are set.
2105 Otherwise, the values associated with the address are used. If neither are set,
2106 it is a configuration error.
2108 The transport or the address may specify a home directory (transport over-
2109 rides), and if they do, this is set as $home. If neither have set a working
2110 directory, this value is used for that as well. Otherwise $home is left unset
2111 and the cwd is set to "/" - a directory that should be accessible to all users.
2113 Using a separate process makes it more complicated to get error information
2114 back. We use a pipe to pass the return code and also an error code and error
2115 text string back to the parent process.
2118 addr points to an address block for this delivery; for "normal" local
2119 deliveries this is the only address to be delivered, but for
2120 pseudo-remote deliveries (e.g. by batch SMTP to a file or pipe)
2121 a number of addresses can be handled simultaneously, and in this
2122 case addr will point to a chain of addresses with the same
2125 shadowing TRUE if running a shadow transport; this causes output from pipes
2132 deliver_local(address_item *addr, BOOL shadowing)
2134 BOOL use_initgroups;
2137 int status, len, rc;
2140 uschar *working_directory;
2141 address_item *addr2;
2142 transport_instance *tp = addr->transport;
2144 /* Set up the return path from the errors or sender address. If the transport
2145 has its own return path setting, expand it and replace the existing value. */
2147 if(addr->prop.errors_address)
2148 return_path = addr->prop.errors_address;
2149 #ifdef EXPERIMENTAL_SRS
2150 else if (addr->prop.srs_sender)
2151 return_path = addr->prop.srs_sender;
2154 return_path = sender_address;
2156 if (tp->return_path)
2158 uschar *new_return_path = expand_string(tp->return_path);
2159 if (!new_return_path)
2161 if (!f.expand_string_forcedfail)
2163 common_error(TRUE, addr, ERRNO_EXPANDFAIL,
2164 US"Failed to expand return path \"%s\" in %s transport: %s",
2165 tp->return_path, tp->name, expand_string_message);
2169 else return_path = new_return_path;
2172 /* For local deliveries, one at a time, the value used for logging can just be
2173 set directly, once and for all. */
2175 used_return_path = return_path;
2177 /* Sort out the uid, gid, and initgroups flag. If an error occurs, the message
2178 gets put into the address(es), and the expansions are unset, so we can just
2181 if (!findugid(addr, tp, &uid, &gid, &use_initgroups)) return;
2183 /* See if either the transport or the address specifies a home directory. A
2184 home directory set in the address may already be expanded; a flag is set to
2185 indicate that. In other cases we must expand it. */
2187 if ( (deliver_home = tp->home_dir) /* Set in transport, or */
2188 || ( (deliver_home = addr->home_dir) /* Set in address and */
2189 && !testflag(addr, af_home_expanded) /* not expanded */
2192 uschar *rawhome = deliver_home;
2193 deliver_home = NULL; /* in case it contains $home */
2194 if (!(deliver_home = expand_string(rawhome)))
2196 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"home directory \"%s\" failed "
2197 "to expand for %s transport: %s", rawhome, tp->name,
2198 expand_string_message);
2201 if (*deliver_home != '/')
2203 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"home directory path \"%s\" "
2204 "is not absolute for %s transport", deliver_home, tp->name);
2209 /* See if either the transport or the address specifies a current directory,
2210 and if so, expand it. If nothing is set, use the home directory, unless it is
2211 also unset in which case use "/", which is assumed to be a directory to which
2212 all users have access. It is necessary to be in a visible directory for some
2213 operating systems when running pipes, as some commands (e.g. "rm" under Solaris
2214 2.5) require this. */
2216 working_directory = tp->current_dir ? tp->current_dir : addr->current_dir;
2217 if (working_directory)
2219 uschar *raw = working_directory;
2220 if (!(working_directory = expand_string(raw)))
2222 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"current directory \"%s\" "
2223 "failed to expand for %s transport: %s", raw, tp->name,
2224 expand_string_message);
2227 if (*working_directory != '/')
2229 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"current directory path "
2230 "\"%s\" is not absolute for %s transport", working_directory, tp->name);
2234 else working_directory = deliver_home ? deliver_home : US"/";
2236 /* If one of the return_output flags is set on the transport, create and open a
2237 file in the message log directory for the transport to write its output onto.
2238 This is mainly used by pipe transports. The file needs to be unique to the
2239 address. This feature is not available for shadow transports. */
2242 && ( tp->return_output || tp->return_fail_output
2243 || tp->log_output || tp->log_fail_output || tp->log_defer_output
2248 addr->return_filename =
2249 spool_fname(US"msglog", message_subdir, message_id,
2250 string_sprintf("-%d-%d", getpid(), return_count++));
2252 if ((addr->return_file = open_msglog_file(addr->return_filename, 0400, &error)) < 0)
2254 common_error(TRUE, addr, errno, US"Unable to %s file for %s transport "
2255 "to return message: %s", error, tp->name, strerror(errno));
2260 /* Create the pipe for inter-process communication. */
2264 common_error(TRUE, addr, ERRNO_PIPEFAIL, US"Creation of pipe failed: %s",
2269 /* Now fork the process to do the real work in the subprocess, but first
2270 ensure that all cached resources are freed so that the subprocess starts with
2271 a clean slate and doesn't interfere with the parent process. */
2275 if ((pid = exim_fork(US"delivery-local")) == 0)
2277 BOOL replicate = TRUE;
2279 /* Prevent core dumps, as we don't want them in users' home directories.
2280 HP-UX doesn't have RLIMIT_CORE; I don't know how to do this in that
2281 system. Some experimental/developing systems (e.g. GNU/Hurd) may define
2282 RLIMIT_CORE but not support it in setrlimit(). For such systems, do not
2283 complain if the error is "not supported".
2285 There are two scenarios where changing the max limit has an effect. In one,
2286 the user is using a .forward and invoking a command of their choice via pipe;
2287 for these, we do need the max limit to be 0 unless the admin chooses to
2288 permit an increased limit. In the other, the command is invoked directly by
2289 the transport and is under administrator control, thus being able to raise
2290 the limit aids in debugging. So there's no general always-right answer.
2292 Thus we inhibit core-dumps completely but let individual transports, while
2293 still root, re-raise the limits back up to aid debugging. We make the
2294 default be no core-dumps -- few enough people can use core dumps in
2295 diagnosis that it's reasonable to make them something that has to be explicitly requested.
2302 if (setrlimit(RLIMIT_CORE, &rl) < 0)
2304 # ifdef SETRLIMIT_NOT_SUPPORTED
2305 if (errno != ENOSYS && errno != ENOTSUP)
2307 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_CORE) failed: %s",
2312 /* Reset the random number generator, so different processes don't all
2313 have the same sequence. */
2317 /* If the transport has a setup entry, call this first, while still
2318 privileged. (Appendfile uses this to expand quota, for example, while
2319 able to read private files.) */
2321 if (addr->transport->setup)
2322 switch((addr->transport->setup)(addr->transport, addr, NULL, uid, gid,
2326 addr->transport_return = DEFER;
2330 addr->transport_return = PANIC;
2334 /* Ignore SIGINT and SIGTERM during delivery. Also ignore SIGUSR1, as
2335 when the process becomes unprivileged, it won't be able to write to the
2336 process log. SIGHUP is ignored throughout exim, except when it is being
2339 signal(SIGINT, SIG_IGN);
2340 signal(SIGTERM, SIG_IGN);
2341 signal(SIGUSR1, SIG_IGN);
2343 /* Close the unwanted half of the pipe, and set close-on-exec for the other
2344 half - for transports that exec things (e.g. pipe). Then set the required
2347 (void)close(pfd[pipe_read]);
2348 (void)fcntl(pfd[pipe_write], F_SETFD, fcntl(pfd[pipe_write], F_GETFD) |
2350 exim_setugid(uid, gid, use_initgroups,
2351 string_sprintf("local delivery to %s <%s> transport=%s", addr->local_part,
2352 addr->address, addr->transport->name));
2356 debug_printf(" home=%s current=%s\n", deliver_home, working_directory);
2357 for (address_item * batched = addr->next; batched; batched = batched->next)
2358 debug_printf("additional batched address: %s\n", batched->address);
2361 /* Set an appropriate working directory. */
2363 if (Uchdir(working_directory) < 0)
2365 addr->transport_return = DEFER;
2366 addr->basic_errno = errno;
2367 addr->message = string_sprintf("failed to chdir to %s", working_directory);
2370 /* If successful, call the transport */
2375 set_process_info("delivering %s to %s using %s", message_id,
2376 addr->local_part, addr->transport->name);
2378 /* Setting this global in the subprocess means we need never clear it */
2379 transport_name = addr->transport->name;
2381 /* If a transport filter has been specified, set up its argument list.
2382 Any errors will get put into the address, and FALSE yielded. */
2384 if (addr->transport->filter_command)
2386 ok = transport_set_up_command(&transport_filter_argv,
2387 addr->transport->filter_command,
2388 TRUE, PANIC, addr, US"transport filter", NULL);
2389 transport_filter_timeout = addr->transport->filter_timeout;
2391 else transport_filter_argv = NULL;
2395 debug_print_string(addr->transport->debug_string);
2396 replicate = !(addr->transport->info->code)(addr->transport, addr);
2400 /* Pass the results back down the pipe. If necessary, first replicate the
2401 status in the top address to the others in the batch. The label is the
2402 subject of a goto when a call to the transport's setup function fails. We
2403 pass the pointer to the transport back in case it got changed as a result of
2404 file_format in appendfile. */
2408 if (replicate) replicate_status(addr);
2409 for (addr2 = addr; addr2; addr2 = addr2->next)
2412 int local_part_length = Ustrlen(addr2->local_part);
2416 if( (ret = write(pfd[pipe_write], &addr2->transport_return, sizeof(int))) != sizeof(int)
2417 || (ret = write(pfd[pipe_write], &transport_count, sizeof(transport_count))) != sizeof(transport_count)
2418 || (ret = write(pfd[pipe_write], &addr2->flags, sizeof(addr2->flags))) != sizeof(addr2->flags)
2419 || (ret = write(pfd[pipe_write], &addr2->basic_errno, sizeof(int))) != sizeof(int)
2420 || (ret = write(pfd[pipe_write], &addr2->more_errno, sizeof(int))) != sizeof(int)
2421 || (ret = write(pfd[pipe_write], &addr2->delivery_time, sizeof(struct timeval))) != sizeof(struct timeval)
2422 || (ret = write(pfd[pipe_write], &addr2->special_action, sizeof(int))) != sizeof(int)
2423 || (ret = write(pfd[pipe_write], &addr2->transport,
2424 sizeof(transport_instance *))) != sizeof(transport_instance *)
2426 /* For a file delivery, pass back the local part, in case the original
2427 was only part of the final delivery path. This gives more complete
2430 || (testflag(addr2, af_file)
2431 && ( (ret = write(pfd[pipe_write], &local_part_length, sizeof(int))) != sizeof(int)
2432 || (ret = write(pfd[pipe_write], addr2->local_part, local_part_length)) != local_part_length
2436 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s",
2437 ret == -1 ? strerror(errno) : "short write");
2439 /* Now any messages */
2441 for (i = 0, s = addr2->message; i < 2; i++, s = addr2->user_message)
2443 int message_length = s ? Ustrlen(s) + 1 : 0;
2444 if( (ret = write(pfd[pipe_write], &message_length, sizeof(int))) != sizeof(int)
2445 || message_length > 0 && (ret = write(pfd[pipe_write], s, message_length)) != message_length
2447 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s",
2448 ret == -1 ? strerror(errno) : "short write");
2452 /* OK, this process is now done. Free any cached resources that it opened,
2453 and close the pipe we were writing down before exiting. */
2455 (void)close(pfd[pipe_write]);
2460 /* Back in the main process: panic if the fork did not succeed. This seems
2461 better than returning an error - if forking is failing it is probably best
2462 not to try other deliveries for this message. */
2465 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Fork failed for local delivery to %s",
2468 /* Read the pipe to get the delivery status codes and error messages. Our copy
2469 of the writing end must be closed first, as otherwise read() won't return zero
2470 on an empty pipe. We check that a status exists for each address before
2471 overwriting the address structure. If data is missing, the default DEFER status
2472 will remain. Afterwards, close the reading end. */
2474 (void)close(pfd[pipe_write]);
2476 for (addr2 = addr; addr2; addr2 = addr2->next)
2478 if ((len = read(pfd[pipe_read], &status, sizeof(int))) > 0)
2483 addr2->transport_return = status;
2484 len = read(pfd[pipe_read], &transport_count,
2485 sizeof(transport_count));
2486 len = read(pfd[pipe_read], &addr2->flags, sizeof(addr2->flags));
2487 len = read(pfd[pipe_read], &addr2->basic_errno, sizeof(int));
2488 len = read(pfd[pipe_read], &addr2->more_errno, sizeof(int));
2489 len = read(pfd[pipe_read], &addr2->delivery_time, sizeof(struct timeval));
2490 len = read(pfd[pipe_read], &addr2->special_action, sizeof(int));
2491 len = read(pfd[pipe_read], &addr2->transport,
2492 sizeof(transport_instance *));
2494 if (testflag(addr2, af_file))
2497 if ( read(pfd[pipe_read], &llen, sizeof(int)) != sizeof(int)
2498 || llen > 64*4 /* limit from rfc 5821, times I18N factor */
2501 log_write(0, LOG_MAIN|LOG_PANIC, "bad local_part length read"
2502 " from delivery subprocess");
2505 /* sanity-checked llen so disable the Coverity error */
2506 /* coverity[tainted_data] */
2507 if (read(pfd[pipe_read], big_buffer, llen) != llen)
2509 log_write(0, LOG_MAIN|LOG_PANIC, "bad local_part read"
2510 " from delivery subprocess");
2513 big_buffer[llen] = 0;
2514 addr2->local_part = string_copy(big_buffer);
2517 for (i = 0, sptr = &addr2->message; i < 2; i++, sptr = &addr2->user_message)
2520 len = read(pfd[pipe_read], &message_length, sizeof(int));
2521 if (message_length > 0)
2523 len = read(pfd[pipe_read], big_buffer, message_length);
2524 big_buffer[big_buffer_size-1] = '\0'; /* guard byte */
2525 if (len > 0) *sptr = string_copy(big_buffer);
2532 log_write(0, LOG_MAIN|LOG_PANIC, "failed to read delivery status for %s "
2533 "from delivery subprocess", addr2->unique);
2538 (void)close(pfd[pipe_read]);
2540 /* Unless shadowing, write all successful addresses immediately to the journal
2541 file, to ensure they are recorded asap. For homonymic addresses, use the base
2542 address plus the transport name. Failure to write the journal is panic-worthy,
2543 but don't stop, as it may prove possible subsequently to update the spool file
2544 in order to record the delivery. */
2548 for (addr2 = addr; addr2; addr2 = addr2->next)
2549 if (addr2->transport_return == OK)
2551 if (testflag(addr2, af_homonym))
2552 sprintf(CS big_buffer, "%.500s/%s\n", addr2->unique + 3, tp->name);
2554 sprintf(CS big_buffer, "%.500s\n", addr2->unique);
2556 /* In the test harness, wait just a bit to let the subprocess finish off
2557 any debug output etc first. */
2559 testharness_pause_ms(300);
2561 DEBUG(D_deliver) debug_printf("journalling %s", big_buffer);
2562 len = Ustrlen(big_buffer);
2563 if (write(journal_fd, big_buffer, len) != len)
2564 log_write(0, LOG_MAIN|LOG_PANIC, "failed to update journal for %s: %s",
2565 big_buffer, strerror(errno));
2568 /* Ensure the journal file is pushed out to disk. */
2570 if (EXIMfsync(journal_fd) < 0)
2571 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s",
2575 /* Wait for the process to finish. If it terminates with a non-zero code,
2576 freeze the message (except for SIGTERM, SIGKILL and SIGQUIT), but leave the
2577 status values of all the addresses as they are. Take care to handle the case
2578 when the subprocess doesn't seem to exist. This has been seen on one system
2579 when Exim was called from an MUA that set SIGCHLD to SIG_IGN. When that
2580 happens, wait() doesn't recognize the termination of child processes. Exim now
2581 resets SIGCHLD to SIG_DFL, but this code should still be robust. */
2583 while ((rc = wait(&status)) != pid)
2584 if (rc < 0 && errno == ECHILD) /* Process has vanished */
2586 log_write(0, LOG_MAIN, "%s transport process vanished unexpectedly",
2587 addr->transport->driver_name);
2592 if ((status & 0xffff) != 0)
2594 int msb = (status >> 8) & 255;
2595 int lsb = status & 255;
2596 int code = (msb == 0)? (lsb & 0x7f) : msb;
2597 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
2598 addr->special_action = SPECIAL_FREEZE;
2599 log_write(0, LOG_MAIN|LOG_PANIC, "%s transport process returned non-zero "
2600 "status 0x%04x: %s %d",
2601 addr->transport->driver_name,
2603 msb == 0 ? "terminated by signal" : "exit code",
2607 /* If SPECIAL_WARN is set in the top address, send a warning message. */
2609 if (addr->special_action == SPECIAL_WARN && addr->transport->warn_message)
2612 uschar *warn_message;
2615 DEBUG(D_deliver) debug_printf("Warning message requested by transport\n");
2617 if (!(warn_message = expand_string(addr->transport->warn_message)))
2618 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand \"%s\" (warning "
2619 "message for %s transport): %s", addr->transport->warn_message,
2620 addr->transport->name, expand_string_message);
2622 else if ((pid = child_open_exim(&fd, US"tpt-warning-message")) > 0)
2624 FILE *f = fdopen(fd, "wb");
2625 if (errors_reply_to && !contains_header(US"Reply-To", warn_message))
2626 fprintf(f, "Reply-To: %s\n", errors_reply_to);
2627 fprintf(f, "Auto-Submitted: auto-replied\n");
2628 if (!contains_header(US"From", warn_message))
2630 fprintf(f, "%s", CS warn_message);
2632 /* Close and wait for child process to complete, without a timeout. */
2635 (void)child_close(pid, 0);
2638 addr->special_action = SPECIAL_NONE;
2645 /* Check transport for the given concurrency limit. Return TRUE if over
2646 the limit (or an expansion failure), else FALSE and if there was a limit,
2647 the key for the hints database used for the concurrency count. */
2650 tpt_parallel_check(transport_instance * tp, address_item * addr, uschar ** key)
2652 unsigned max_parallel;
2654 if (!tp->max_parallel) return FALSE;
2656 max_parallel = (unsigned) expand_string_integer(tp->max_parallel, TRUE);
2657 if (expand_string_message)
2659 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand max_parallel option "
2660 "in %s transport (%s): %s", tp->name, addr->address,
2661 expand_string_message);
2665 if (max_parallel > 0)
2667 uschar * serialize_key = string_sprintf("tpt-serialize-%s", tp->name);
2668 if (!enq_start(serialize_key, max_parallel))
2670 address_item * next;
2672 debug_printf("skipping tpt %s because concurrency limit %u reached\n",
2673 tp->name, max_parallel);
2677 addr->message = US"concurrency limit reached for transport";
2678 addr->basic_errno = ERRNO_TRETRY;
2679 post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_TRANSPORT, 0);
2680 } while ((addr = next));
2683 *key = serialize_key;
2690 /*************************************************
2691 * Do local deliveries *
2692 *************************************************/
2694 /* This function processes the list of addresses in addr_local. True local
2695 deliveries are always done one address at a time. However, local deliveries can
2696 be batched up in some cases. Typically this is when writing batched SMTP output
2697 files for use by some external transport mechanism, or when running local
2698 deliveries over LMTP.
2705 do_local_deliveries(void)
2708 open_db *dbm_file = NULL;
2709 time_t now = time(NULL);
2711 /* Loop until we have exhausted the supply of local deliveries */
2715 struct timeval delivery_start;
2716 struct timeval deliver_time;
2717 address_item *addr2, *addr3, *nextaddr;
2718 int logflags = LOG_MAIN;
2719 int logchar = f.dont_deliver? '*' : '=';
2720 transport_instance *tp;
2721 uschar * serialize_key = NULL;
2723 /* Pick the first undelivered address off the chain */
2725 address_item *addr = addr_local;
2726 addr_local = addr->next;
2729 DEBUG(D_deliver|D_transport)
2730 debug_printf("--------> %s <--------\n", addr->address);
2732 /* An internal disaster if there is no transport. Should not occur! */
2734 if (!(tp = addr->transport))
2736 logflags |= LOG_PANIC;
2737 f.disable_logging = FALSE; /* Jic */
2738 addr->message = addr->router
2739 ? string_sprintf("No transport set by %s router", addr->router->name)
2740 : US"No transport set by system filter";
2741 post_process_one(addr, DEFER, logflags, EXIM_DTYPE_TRANSPORT, 0);
2745 /* Check that this base address hasn't previously been delivered to this
2746 transport. The check is necessary at this point to handle homonymic addresses
2747 correctly in cases where the pattern of redirection changes between delivery
2748 attempts. Non-homonymic previous delivery is detected earlier, at routing
2751 if (previously_transported(addr, FALSE)) continue;
2753 /* There are weird cases where logging is disabled */
2755 f.disable_logging = tp->disable_logging;
2757 /* Check for batched addresses and possible amalgamation. Skip all the work
2758 if either batch_max <= 1 or there aren't any other addresses for local
2761 if (tp->batch_max > 1 && addr_local)
2763 int batch_count = 1;
2764 BOOL uses_dom = readconf_depends((driver_instance *)tp, US"domain");
2765 BOOL uses_lp = ( testflag(addr, af_pfr)
2766 && (testflag(addr, af_file) || addr->local_part[0] == '|')
2768 || readconf_depends((driver_instance *)tp, US"local_part");
2769 uschar *batch_id = NULL;
2770 address_item **anchor = &addr_local;
2771 address_item *last = addr;
2774 /* Expand the batch_id string for comparison with other addresses.
2775 Expansion failure suppresses batching. */
2779 deliver_set_expansions(addr);
2780 batch_id = expand_string(tp->batch_id);
2781 deliver_set_expansions(NULL);
2784 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2785 "in %s transport (%s): %s", tp->name, addr->address,
2786 expand_string_message);
2787 batch_count = tp->batch_max;
2791 /* Until we reach the batch_max limit, pick off addresses which have the
2792 same characteristics. These are:
2795 not previously delivered (see comment about 50 lines above)
2796 same local part if the transport's configuration contains $local_part
2797 or if this is a file or pipe delivery from a redirection
2798 same domain if the transport's configuration contains $domain
2800 same additional headers
2801 same headers to be removed
2802 same uid/gid for running the transport
2803 same first host if a host list is set
2806 while ((next = *anchor) && batch_count < tp->batch_max)
2809 tp == next->transport
2810 && !previously_transported(next, TRUE)
2811 && testflag(addr, af_pfr) == testflag(next, af_pfr)
2812 && testflag(addr, af_file) == testflag(next, af_file)
2813 && (!uses_lp || Ustrcmp(next->local_part, addr->local_part) == 0)
2814 && (!uses_dom || Ustrcmp(next->domain, addr->domain) == 0)
2815 && same_strings(next->prop.errors_address, addr->prop.errors_address)
2816 && same_headers(next->prop.extra_headers, addr->prop.extra_headers)
2817 && same_strings(next->prop.remove_headers, addr->prop.remove_headers)
2818 && same_ugid(tp, addr, next)
2819 && ( !addr->host_list && !next->host_list
2822 && Ustrcmp(addr->host_list->name, next->host_list->name) == 0
2825 /* If the transport has a batch_id setting, batch_id will be non-NULL
2826 from the expansion outside the loop. Expand for this address and compare.
2827 Expansion failure makes this address ineligible for batching. */
2832 address_item *save_nextnext = next->next;
2833 next->next = NULL; /* Expansion for a single address */
2834 deliver_set_expansions(next);
2835 next->next = save_nextnext;
2836 bid = expand_string(tp->batch_id);
2837 deliver_set_expansions(NULL);
2840 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2841 "in %s transport (%s): %s", tp->name, next->address,
2842 expand_string_message);
2845 else ok = (Ustrcmp(batch_id, bid) == 0);
2848 /* Take address into batch if OK. */
2852 *anchor = next->next; /* Include the address */
2858 else anchor = &next->next; /* Skip the address */
2862 /* We now have one or more addresses that can be delivered in a batch. Check
2863 whether the transport is prepared to accept a message of this size. If not,
2864 fail them all forthwith. If the expansion fails, or does not yield an
2865 integer, defer delivery. */
2867 if (tp->message_size_limit)
2869 int rc = check_message_size(tp, addr);
2872 replicate_status(addr);
2876 post_process_one(addr, rc, logflags, EXIM_DTYPE_TRANSPORT, 0);
2879 continue; /* With next batch of addresses */
2883 /* If we are not running the queue, or if forcing, all deliveries will be
2884 attempted. Otherwise, we must respect the retry times for each address. Even
2885 when not doing this, we need to set up the retry key string, and determine
2886 whether a retry record exists, because after a successful delivery, a delete
2887 retry item must be set up. Keep the retry database open only for the duration
2888 of these checks, rather than for all local deliveries, because some local
2889 deliveries (e.g. to pipes) can take a substantial time. */
2891 if (!(dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE, TRUE)))
2893 DEBUG(D_deliver|D_retry|D_hints_lookup)
2894 debug_printf("no retry data available\n");
2901 BOOL ok = TRUE; /* to deliver this address */
2904 /* Set up the retry key to include the domain or not, and change its
2905 leading character from "R" to "T". Must make a copy before doing this,
2906 because the old key may be pointed to from a "delete" retry item after
2909 retry_key = string_copy(
2910 tp->retry_use_local_part ? addr2->address_retry_key :
2911 addr2->domain_retry_key);
2914 /* Inspect the retry data. If there is no hints file, delivery happens. */
2918 dbdata_retry *retry_record = dbfn_read(dbm_file, retry_key);
2920 /* If there is no retry record, delivery happens. If there is,
2921 remember it exists so it can be deleted after a successful delivery. */
2925 setflag(addr2, af_lt_retry_exists);
2927 /* A retry record exists for this address. If queue running and not
2928 forcing, inspect its contents. If the record is too old, or if its
2929 retry time has come, or if it has passed its cutoff time, delivery
2934 debug_printf("retry record exists: age=%s ",
2935 readconf_printtime(now - retry_record->time_stamp));
2936 debug_printf("(max %s)\n", readconf_printtime(retry_data_expire));
2937 debug_printf(" time to retry = %s expired = %d\n",
2938 readconf_printtime(retry_record->next_try - now),
2939 retry_record->expired);
2942 if (f.queue_running && !f.deliver_force)
2944 ok = (now - retry_record->time_stamp > retry_data_expire)
2945 || (now >= retry_record->next_try)
2946 || retry_record->expired;
2948 /* If we haven't reached the retry time, there is one more check
2949 to do, which is for the ultimate address timeout. */
2952 ok = retry_ultimate_address_timeout(retry_key, addr2->domain,
2956 else DEBUG(D_retry) debug_printf("no retry record exists\n");
2959 /* This address is to be delivered. Leave it on the chain. */
2964 addr2 = addr2->next;
2967 /* This address is to be deferred. Take it out of the chain, and
2968 post-process it as complete. Must take it out of the chain first,
2969 because post processing puts it on another chain. */
2973 address_item *this = addr2;
2974 this->message = US"Retry time not yet reached";
2975 this->basic_errno = ERRNO_LRETRY;
2976 addr2 = addr3 ? (addr3->next = addr2->next)
2977 : (addr = addr2->next);
2978 post_process_one(this, DEFER, logflags, EXIM_DTYPE_TRANSPORT, 0);
2982 if (dbm_file) dbfn_close(dbm_file);
2984 /* If there are no addresses left on the chain, they all deferred. Loop
2985 for the next set of addresses. */
2987 if (!addr) continue;
2989 /* If the transport is limited for parallellism, enforce that here.
2990 We use a hints DB entry, incremented here and decremented after
2991 the transport (and any shadow transport) completes. */
2993 if (tpt_parallel_check(tp, addr, &serialize_key))
2995 if (expand_string_message)
2997 logflags |= LOG_PANIC;
3001 post_process_one(addr, DEFER, logflags, EXIM_DTYPE_TRANSPORT, 0);
3002 } while ((addr = addr2));
3004 continue; /* Loop for the next set of addresses. */
3008 /* So, finally, we do have some addresses that can be passed to the
3009 transport. Before doing so, set up variables that are relevant to a
3012 deliver_set_expansions(addr);
3014 gettimeofday(&delivery_start, NULL);
3015 deliver_local(addr, FALSE);
3016 timesince(&deliver_time, &delivery_start);
3018 /* If a shadow transport (which must perforce be another local transport), is
3019 defined, and its condition is met, we must pass the message to the shadow
3020 too, but only those addresses that succeeded. We do this by making a new
3021 chain of addresses - also to keep the original chain uncontaminated. We must
3022 use a chain rather than doing it one by one, because the shadow transport may
3025 NOTE: if the condition fails because of a lookup defer, there is nothing we
3029 && ( !tp->shadow_condition
3030 || expand_check_condition(tp->shadow_condition, tp->name, US"transport")
3033 transport_instance *stp;
3034 address_item *shadow_addr = NULL;
3035 address_item **last = &shadow_addr;
3037 for (stp = transports; stp; stp = stp->next)
3038 if (Ustrcmp(stp->name, tp->shadow) == 0) break;
3041 log_write(0, LOG_MAIN|LOG_PANIC, "shadow transport \"%s\" not found ",
3044 /* Pick off the addresses that have succeeded, and make clones. Put into
3045 the shadow_message field a pointer to the shadow_message field of the real
3048 else for (addr2 = addr; addr2; addr2 = addr2->next)
3049 if (addr2->transport_return == OK)
3051 addr3 = store_get(sizeof(address_item), FALSE);
3054 addr3->shadow_message = US &addr2->shadow_message;
3055 addr3->transport = stp;
3056 addr3->transport_return = DEFER;
3057 addr3->return_filename = NULL;
3058 addr3->return_file = -1;
3060 last = &addr3->next;
3063 /* If we found any addresses to shadow, run the delivery, and stick any
3064 message back into the shadow_message field in the original. */
3068 int save_count = transport_count;
3070 DEBUG(D_deliver|D_transport)
3071 debug_printf(">>>>>>>>>>>>>>>> Shadow delivery >>>>>>>>>>>>>>>>\n");
3072 deliver_local(shadow_addr, TRUE);
3074 for(; shadow_addr; shadow_addr = shadow_addr->next)
3076 int sresult = shadow_addr->transport_return;
3077 *(uschar **)shadow_addr->shadow_message =
3079 ? string_sprintf(" ST=%s", stp->name)
3080 : string_sprintf(" ST=%s (%s%s%s)", stp->name,
3081 shadow_addr->basic_errno <= 0
3083 : US strerror(shadow_addr->basic_errno),
3084 shadow_addr->basic_errno <= 0 || !shadow_addr->message
3087 shadow_addr->message
3088 ? shadow_addr->message
3089 : shadow_addr->basic_errno <= 0
3093 DEBUG(D_deliver|D_transport)
3094 debug_printf("%s shadow transport returned %s for %s\n",
3095 stp->name, rc_to_string(sresult), shadow_addr->address);
3098 DEBUG(D_deliver|D_transport)
3099 debug_printf(">>>>>>>>>>>>>>>> End shadow delivery >>>>>>>>>>>>>>>>\n");
3101 transport_count = save_count; /* Restore original transport count */
3105 /* Cancel the expansions that were set up for the delivery. */
3107 deliver_set_expansions(NULL);
3109 /* If the transport was parallelism-limited, decrement the hints DB record. */
3111 if (serialize_key) enq_end(serialize_key);
3113 /* Now we can process the results of the real transport. We must take each
3114 address off the chain first, because post_process_one() puts it on another
3117 for (addr2 = addr; addr2; addr2 = nextaddr)
3119 int result = addr2->transport_return;
3120 nextaddr = addr2->next;
3122 DEBUG(D_deliver|D_transport)
3123 debug_printf("%s transport returned %s for %s\n",
3124 tp->name, rc_to_string(result), addr2->address);
3126 /* If there is a retry_record, or if delivery is deferred, build a retry
3127 item for setting a new retry time or deleting the old retry record from
3128 the database. These items are handled all together after all addresses
3129 have been handled (so the database is open just for a short time for
3132 if (result == DEFER || testflag(addr2, af_lt_retry_exists))
3134 int flags = result == DEFER ? 0 : rf_delete;
3135 uschar *retry_key = string_copy(tp->retry_use_local_part
3136 ? addr2->address_retry_key : addr2->domain_retry_key);
3138 retry_add_item(addr2, retry_key, flags);
3141 /* Done with this address */
3143 addr2->delivery_time = deliver_time;
3144 post_process_one(addr2, result, logflags, EXIM_DTYPE_TRANSPORT, logchar);
3146 /* If a pipe delivery generated text to be sent back, the result may be
3147 changed to FAIL, and we must copy this for subsequent addresses in the
3150 if (addr2->transport_return != result)
3152 for (addr3 = nextaddr; addr3; addr3 = addr3->next)
3154 addr3->transport_return = addr2->transport_return;
3155 addr3->basic_errno = addr2->basic_errno;
3156 addr3->message = addr2->message;
3158 result = addr2->transport_return;
3161 /* Whether or not the result was changed to FAIL, we need to copy the
3162 return_file value from the first address into all the addresses of the
3163 batch, so they are all listed in the error message. */
3165 addr2->return_file = addr->return_file;
3167 /* Change log character for recording successful deliveries. */
3169 if (result == OK) logchar = '-';
3171 } /* Loop back for next batch of addresses */
3177 /*************************************************
3178 * Sort remote deliveries *
3179 *************************************************/
3181 /* This function is called if remote_sort_domains is set. It arranges that the
3182 chain of addresses for remote deliveries is ordered according to the strings
3183 specified. Try to make this shuffling reasonably efficient by handling
3184 sequences of addresses rather than just single ones.
3191 sort_remote_deliveries(void)
3194 address_item **aptr = &addr_remote;
3195 const uschar *listptr = remote_sort_domains;
3200 && (pattern = string_nextinlist(&listptr, &sep, patbuf, sizeof(patbuf)))
3203 address_item *moved = NULL;
3204 address_item **bptr = &moved;
3208 address_item **next;
3209 deliver_domain = (*aptr)->domain; /* set $domain */
3210 if (match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1,
3211 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK)
3213 aptr = &(*aptr)->next;
3217 next = &(*aptr)->next;
3219 && (deliver_domain = (*next)->domain, /* Set $domain */
3220 match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1,
3221 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL)) != OK
3223 next = &(*next)->next;
3225 /* If the batch of non-matchers is at the end, add on any that were
3226 extracted further up the chain, and end this iteration. Otherwise,
3227 extract them from the chain and hang on the moved chain. */
3239 aptr = &(*aptr)->next;
3242 /* If the loop ended because the final address matched, *aptr will
3243 be NULL. Add on to the end any extracted non-matching addresses. If
3244 *aptr is not NULL, the loop ended via "break" when *next is null, that
3245 is, there was a string of non-matching addresses at the end. In this
3246 case the extracted addresses have already been added on the end. */
3248 if (!*aptr) *aptr = moved;
3253 debug_printf("remote addresses after sorting:\n");
3254 for (address_item * addr = addr_remote; addr; addr = addr->next)
3255 debug_printf(" %s\n", addr->address);
3261 /*************************************************
3262 * Read from pipe for remote delivery subprocess *
3263 *************************************************/
3265 /* This function is called when the subprocess is complete, but can also be
3266 called before it is complete, in order to empty a pipe that is full (to prevent
3267 deadlock). It must therefore keep track of its progress in the parlist data
3270 We read the pipe to get the delivery status codes and a possible error message
3271 for each address, optionally preceded by unusability data for the hosts and
3272 also by optional retry data.
3274 Read in large chunks into the big buffer and then scan through, interpreting
3275 the data therein. In most cases, only a single read will be necessary. No
3276 individual item will ever be anywhere near 2500 bytes in length, so by ensuring
3277 that we read the next chunk when there is less than 2500 bytes left in the
3278 non-final chunk, we can assume each item is complete in the buffer before
3279 handling it. Each item is written using a single write(), which is atomic for
3280 small items (less than PIPE_BUF, which seems to be at least 512 in any Unix and
3281 often bigger) so even if we are reading while the subprocess is still going, we
3282 should never have only a partial item in the buffer.
3284 hs12: This assumption is not true anymore, since we get quite large items (certificate
3285 information and such).
3288 poffset the offset of the parlist item
3289 eop TRUE if the process has completed
3291 Returns: TRUE if the terminating 'Z' item has been read,
3292 or there has been a disaster (i.e. no more data needed);
3297 par_read_pipe(int poffset, BOOL eop)
3300 pardata *p = parlist + poffset;
3301 address_item *addrlist = p->addrlist;
3302 address_item *addr = p->addr;
3306 uschar *msg = p->msg;
3307 BOOL done = p->done;
3309 /* Loop through all items, reading from the pipe when necessary. The pipe
3310 used to be non-blocking. But I do not see a reason for using non-blocking I/O
3311 here, as the preceding select() tells us, if data is available for reading.
3313 A read() on a "selected" handle should never block, but(!) it may return
3314 less data then we expected. (The buffer size we pass to read() shouldn't be
3315 understood as a "request", but as a "limit".)
3317 Each separate item is written to the pipe in a timely manner. But, especially for
3318 larger items, the read(2) may already return partial data from the write(2).
3320 The write is atomic mostly (depending on the amount written), but atomic does
3321 not imply "all or noting", it just is "not intermixed" with other writes on the
3322 same channel (pipe).
3326 DEBUG(D_deliver) debug_printf("reading pipe for subprocess %d (%s)\n",
3327 (int)p->pid, eop? "ended" : "not ended yet");
3331 retry_item *r, **rp;
3332 uschar pipeheader[PIPE_HEADER_SIZE+1];
3333 uschar *id = &pipeheader[0];
3334 uschar *subid = &pipeheader[1];
3335 uschar *ptr = big_buffer;
3336 size_t required = PIPE_HEADER_SIZE; /* first the pipehaeder, later the data */
3339 DEBUG(D_deliver) debug_printf(
3340 "expect %lu bytes (pipeheader) from tpt process %d\n", (u_long)required, pid);
3342 /* We require(!) all the PIPE_HEADER_SIZE bytes here, as we know,
3343 they're written in a timely manner, so waiting for the write shouldn't hurt a lot.
3344 If we get less, we can assume the subprocess do be done and do not expect any further
3345 information from it. */
3347 if ((got = readn(fd, pipeheader, required)) != required)
3349 msg = string_sprintf("got " SSIZE_T_FMT " of %d bytes (pipeheader) "
3350 "from transport process %d for transport %s",
3351 got, PIPE_HEADER_SIZE, pid, addr->transport->driver_name);
3356 pipeheader[PIPE_HEADER_SIZE] = '\0';
3358 debug_printf("got %ld bytes (pipeheader) from transport process %d\n",
3362 /* If we can't decode the pipeheader, the subprocess seems to have a
3363 problem, we do not expect any furher information from it. */
3365 required = Ustrtol(pipeheader+2, &endc, 10);
3368 msg = string_sprintf("failed to read pipe "
3369 "from transport process %d for transport %s: error decoding size from header",
3370 pid, addr->transport->driver_name);
3377 debug_printf("expect %lu bytes (pipedata) from transport process %d\n",
3378 (u_long)required, pid);
3380 /* Same as above, the transport process will write the bytes announced
3381 in a timely manner, so we can just wait for the bytes, getting less than expected
3382 is considered a problem of the subprocess, we do not expect anything else from it. */
3383 if ((got = readn(fd, big_buffer, required)) != required)
3385 msg = string_sprintf("got only " SSIZE_T_FMT " of " SIZE_T_FMT
3386 " bytes (pipedata) from transport process %d for transport %s",
3387 got, required, pid, addr->transport->driver_name);
3392 /* Handle each possible type of item, assuming the complete item is
3393 available in store. */
3397 /* Host items exist only if any hosts were marked unusable. Match
3398 up by checking the IP address. */
3401 for (h = addrlist->host_list; h; h = h->next)
3403 if (!h->address || Ustrcmp(h->address, ptr+2) != 0) continue;
3411 /* Retry items are sent in a preceding R item for each address. This is
3412 kept separate to keep each message short enough to guarantee it won't
3413 be split in the pipe. Hopefully, in the majority of cases, there won't in
3414 fact be any retry items at all.
3416 The complete set of retry items might include an item to delete a
3417 routing retry if there was a previous routing delay. However, routing
3418 retries are also used when a remote transport identifies an address error.
3419 In that case, there may also be an "add" item for the same key. Arrange
3420 that a "delete" item is dropped in favour of an "add" item. */
3423 if (!addr) goto ADDR_MISMATCH;
3425 DEBUG(D_deliver|D_retry)
3426 debug_printf("reading retry information for %s from subprocess\n",
3429 /* Cut out any "delete" items on the list. */
3431 for (rp = &addr->retries; (r = *rp); rp = &r->next)
3432 if (Ustrcmp(r->key, ptr+1) == 0) /* Found item with same key */
3434 if (!(r->flags & rf_delete)) break; /* It was not "delete" */
3435 *rp = r->next; /* Excise a delete item */
3436 DEBUG(D_deliver|D_retry)
3437 debug_printf(" existing delete item dropped\n");
3440 /* We want to add a delete item only if there is no non-delete item;
3441 however we still have to step ptr through the data. */
3443 if (!r || !(*ptr & rf_delete))
3445 r = store_get(sizeof(retry_item), FALSE);
3446 r->next = addr->retries;
3449 r->key = string_copy(ptr);
3451 memcpy(&r->basic_errno, ptr, sizeof(r->basic_errno));
3452 ptr += sizeof(r->basic_errno);
3453 memcpy(&r->more_errno, ptr, sizeof(r->more_errno));
3454 ptr += sizeof(r->more_errno);
3455 r->message = *ptr ? string_copy(ptr) : NULL;
3456 DEBUG(D_deliver|D_retry) debug_printf(" added %s item\n",
3457 r->flags & rf_delete ? "delete" : "retry");
3462 DEBUG(D_deliver|D_retry)
3463 debug_printf(" delete item not added: non-delete item exists\n");
3466 ptr += sizeof(r->basic_errno) + sizeof(r->more_errno);
3472 /* Put the amount of data written into the parlist block */
3475 memcpy(&(p->transport_count), ptr, sizeof(transport_count));
3476 ptr += sizeof(transport_count);
3479 /* Address items are in the order of items on the address chain. We
3480 remember the current address value in case this function is called
3481 several times to empty the pipe in stages. Information about delivery
3482 over TLS is sent in a preceding X item for each address. We don't put
3483 it in with the other info, in order to keep each message short enough to
3484 guarantee it won't be split in the pipe. */
3488 if (!addr) goto ADDR_MISMATCH; /* Below, in 'A' handler */
3492 addr->tlsver = addr->cipher = addr->peerdn = NULL;
3496 addr->cipher = string_copy(ptr);
3497 addr->tlsver = string_copyn(ptr, Ustrchr(ptr, ':') - ptr);
3501 addr->peerdn = string_copy(ptr);
3506 (void) tls_import_cert(ptr, &addr->peercert);
3508 addr->peercert = NULL;
3513 (void) tls_import_cert(ptr, &addr->ourcert);
3515 addr->ourcert = NULL;
3518 # ifndef DISABLE_OCSP
3520 addr->ocsp = *ptr ? *ptr - '0' : OCSP_NOT_REQ;
3526 #endif /*DISABLE_TLS*/
3528 case 'C': /* client authenticator information */
3531 case '1': addr->authenticator = *ptr ? string_copy(ptr) : NULL; break;
3532 case '2': addr->auth_id = *ptr ? string_copy(ptr) : NULL; break;
3533 case '3': addr->auth_sndr = *ptr ? string_copy(ptr) : NULL; break;
3538 #ifndef DISABLE_PRDR
3540 setflag(addr, af_prdr_used);
3547 #ifndef DISABLE_PIPE_CONNECT
3548 case 2: setflag(addr, af_early_pipe); /*FALLTHROUGH*/
3550 case 1: setflag(addr, af_pipelining); break;
3555 setflag(addr, af_chunking_used);
3559 setflag(addr, af_tcp_fastopen_conn);
3560 if (*subid > '0') setflag(addr, af_tcp_fastopen);
3561 if (*subid > '1') setflag(addr, af_tcp_fastopen_data);
3565 if (!addr) goto ADDR_MISMATCH;
3566 memcpy(&(addr->dsn_aware), ptr, sizeof(addr->dsn_aware));
3567 ptr += sizeof(addr->dsn_aware);
3568 DEBUG(D_deliver) debug_printf("DSN read: addr->dsn_aware = %d\n", addr->dsn_aware);
3575 msg = string_sprintf("address count mismatch for data read from pipe "
3576 "for transport process %d for transport %s", pid,
3577 addrlist->transport->driver_name);
3584 #ifdef SUPPORT_SOCKS
3585 case '2': /* proxy information; must arrive before A0 and applies to that addr XXX oops*/
3586 proxy_session = TRUE; /*XXX should this be cleared somewhere? */
3591 proxy_local_address = string_copy(ptr);
3593 memcpy(&proxy_local_port, ptr, sizeof(proxy_local_port));
3594 ptr += sizeof(proxy_local_port);
3599 #ifdef EXPERIMENTAL_DSN_INFO
3600 case '1': /* must arrive before A0, and applies to that addr */
3601 /* Two strings: smtp_greeting and helo_response */
3602 addr->smtp_greeting = string_copy(ptr);
3604 addr->helo_response = string_copy(ptr);
3610 DEBUG(D_deliver) debug_printf("A0 %s tret %d\n", addr->address, *ptr);
3611 addr->transport_return = *ptr++;
3612 addr->special_action = *ptr++;
3613 memcpy(&addr->basic_errno, ptr, sizeof(addr->basic_errno));
3614 ptr += sizeof(addr->basic_errno);
3615 memcpy(&addr->more_errno, ptr, sizeof(addr->more_errno));
3616 ptr += sizeof(addr->more_errno);
3617 memcpy(&addr->delivery_time, ptr, sizeof(addr->delivery_time));
3618 ptr += sizeof(addr->delivery_time);
3619 memcpy(&addr->flags, ptr, sizeof(addr->flags));
3620 ptr += sizeof(addr->flags);
3621 addr->message = *ptr ? string_copy(ptr) : NULL;
3623 addr->user_message = *ptr ? string_copy(ptr) : NULL;
3626 /* Always two strings for host information, followed by the port number and DNSSEC mark */
3630 h = store_get(sizeof(host_item), FALSE);
3631 h->name = string_copy(ptr);
3633 h->address = string_copy(ptr);
3635 memcpy(&h->port, ptr, sizeof(h->port));
3636 ptr += sizeof(h->port);
3637 h->dnssec = *ptr == '2' ? DS_YES
3638 : *ptr == '1' ? DS_NO
3641 addr->host_used = h;
3645 /* Finished with this address */
3652 /* Local interface address/port */
3654 if (*ptr) sending_ip_address = string_copy(ptr);
3656 if (*ptr) sending_port = atoi(CS ptr);
3660 /* Z marks the logical end of the data. It is followed by '0' if
3661 continue_transport was NULL at the end of transporting, otherwise '1'.
3662 We need to know when it becomes NULL during a delivery down a passed SMTP
3663 channel so that we don't try to pass anything more down it. Of course, for
3664 most normal messages it will remain NULL all the time. */
3669 continue_transport = NULL;
3670 continue_hostname = NULL;
3673 DEBUG(D_deliver) debug_printf("Z0%c item read\n", *ptr);
3676 /* Anything else is a disaster. */
3679 msg = string_sprintf("malformed data (%d) read from pipe for transport "
3680 "process %d for transport %s", ptr[-1], pid,
3681 addr->transport->driver_name);
3687 /* The done flag is inspected externally, to determine whether or not to
3688 call the function again when the process finishes. */
3692 /* If the process hadn't finished, and we haven't seen the end of the data
3693 or if we suffered a disaster, update the rest of the state, and return FALSE to
3694 indicate "not finished". */
3703 /* Close our end of the pipe, to prevent deadlock if the far end is still
3704 pushing stuff into it. */
3709 /* If we have finished without error, but haven't had data for every address,
3710 something is wrong. */
3713 msg = string_sprintf("insufficient address data read from pipe "
3714 "for transport process %d for transport %s", pid,
3715 addr->transport->driver_name);
3717 /* If an error message is set, something has gone wrong in getting back
3718 the delivery data. Put the message into each address and freeze it. */
3721 for (addr = addrlist; addr; addr = addr->next)
3723 addr->transport_return = DEFER;
3724 addr->special_action = SPECIAL_FREEZE;
3725 addr->message = msg;
3726 log_write(0, LOG_MAIN|LOG_PANIC, "Delivery status for %s: %s\n", addr->address, addr->message);
3729 /* Return TRUE to indicate we have got all we need from this process, even
3730 if it hasn't actually finished yet. */
3737 /*************************************************
3738 * Post-process a set of remote addresses *
3739 *************************************************/
3741 /* Do what has to be done immediately after a remote delivery for each set of
3742 addresses, then re-write the spool if necessary. Note that post_process_one
3743 puts the address on an appropriate queue; hence we must fish off the next
3744 one first. This function is also called if there is a problem with setting
3745 up a subprocess to do a remote delivery in parallel. In this case, the final
3746 argument contains a message, and the action must be forced to DEFER.
3749 addr pointer to chain of address items
3750 logflags flags for logging
3751 msg NULL for normal cases; -> error message for unexpected problems
3752 fallback TRUE if processing fallback hosts
3758 remote_post_process(address_item *addr, int logflags, uschar *msg,
3761 /* If any host addresses were found to be unusable, add them to the unusable
3762 tree so that subsequent deliveries don't try them. */
3764 for (host_item * h = addr->host_list; h; h = h->next)
3766 if (h->status >= hstatus_unusable) tree_add_unusable(h);
3768 /* Now handle each address on the chain. The transport has placed '=' or '-'
3769 into the special_action field for each successful delivery. */
3773 address_item *next = addr->next;
3775 /* If msg == NULL (normal processing) and the result is DEFER and we are
3776 processing the main hosts and there are fallback hosts available, put the
3777 address on the list for fallback delivery. */
3779 if ( addr->transport_return == DEFER
3780 && addr->fallback_hosts
3785 addr->host_list = addr->fallback_hosts;
3786 addr->next = addr_fallback;
3787 addr_fallback = addr;
3788 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", addr->address);
3791 /* If msg is set (=> unexpected problem), set it in the address before
3792 doing the ordinary post processing. */
3798 addr->message = msg;
3799 addr->transport_return = DEFER;
3801 (void)post_process_one(addr, addr->transport_return, logflags,
3802 EXIM_DTYPE_TRANSPORT, addr->special_action);
3810 /* If we have just delivered down a passed SMTP channel, and that was
3811 the last address, the channel will have been closed down. Now that
3812 we have logged that delivery, set continue_sequence to 1 so that
3813 any subsequent deliveries don't get "*" incorrectly logged. */
3815 if (!continue_transport) continue_sequence = 1;
3820 /*************************************************
3821 * Wait for one remote delivery subprocess *
3822 *************************************************/
3824 /* This function is called while doing remote deliveries when either the
3825 maximum number of processes exist and we need one to complete so that another
3826 can be created, or when waiting for the last ones to complete. It must wait for
3827 the completion of one subprocess, empty the control block slot, and return a
3828 pointer to the address chain.
3831 Returns: pointer to the chain of addresses handled by the process;
3832 NULL if no subprocess found - this is an unexpected error
3835 static address_item *
3838 int poffset, status;
3839 address_item *addr, *addrlist;
3842 set_process_info("delivering %s: waiting for a remote delivery subprocess "
3843 "to finish", message_id);
3845 /* Loop until either a subprocess completes, or there are no subprocesses in
3846 existence - in which case give an error return. We cannot proceed just by
3847 waiting for a completion, because a subprocess may have filled up its pipe, and
3848 be waiting for it to be emptied. Therefore, if no processes have finished, we
3849 wait for one of the pipes to acquire some data by calling select(), with a
3850 timeout just in case.
3852 The simple approach is just to iterate after reading data from a ready pipe.
3853 This leads to non-ideal behaviour when the subprocess has written its final Z
3854 item, closed the pipe, and is in the process of exiting (the common case). A
3855 call to waitpid() yields nothing completed, but select() shows the pipe ready -
3856 reading it yields EOF, so you end up with busy-waiting until the subprocess has
3859 To avoid this, if all the data that is needed has been read from a subprocess
3860 after select(), an explicit wait() for it is done. We know that all it is doing
3861 is writing to the pipe and then exiting, so the wait should not be long.
3863 The non-blocking waitpid() is to some extent just insurance; if we could
3864 reliably detect end-of-file on the pipe, we could always know when to do a
3865 blocking wait() for a completed process. However, because some systems use
3866 NDELAY, which doesn't distinguish between EOF and pipe empty, it is easier to
3867 use code that functions without the need to recognize EOF.
3869 There's a double loop here just in case we end up with a process that is not in
3870 the list of remote delivery processes. Something has obviously gone wrong if
3871 this is the case. (For example, a process that is incorrectly left over from
3872 routing or local deliveries might be found.) The damage can be minimized by
3873 looping back and looking for another process. If there aren't any, the error
3874 return will happen. */
3876 for (;;) /* Normally we do not repeat this loop */
3878 while ((pid = waitpid(-1, &status, WNOHANG)) <= 0)
3881 fd_set select_pipes;
3882 int maxpipe, readycount;
3884 /* A return value of -1 can mean several things. If errno != ECHILD, it
3885 either means invalid options (which we discount), or that this process was
3886 interrupted by a signal. Just loop to try the waitpid() again.
3888 If errno == ECHILD, waitpid() is telling us that there are no subprocesses
3889 in existence. This should never happen, and is an unexpected error.
3890 However, there is a nasty complication when running under Linux. If "strace
3891 -f" is being used under Linux to trace this process and its children,
3892 subprocesses are "stolen" from their parents and become the children of the
3893 tracing process. A general wait such as the one we've just obeyed returns
3894 as if there are no children while subprocesses are running. Once a
3895 subprocess completes, it is restored to the parent, and waitpid(-1) finds
3896 it. Thanks to Joachim Wieland for finding all this out and suggesting a
3899 This does not happen using "truss" on Solaris, nor (I think) with other
3900 tracing facilities on other OS. It seems to be specific to Linux.
3902 What we do to get round this is to use kill() to see if any of our
3903 subprocesses are still in existence. If kill() gives an OK return, we know
3904 it must be for one of our processes - it can't be for a re-use of the pid,
3905 because if our process had finished, waitpid() would have found it. If any
3906 of our subprocesses are in existence, we proceed to use select() as if
3907 waitpid() had returned zero. I think this is safe. */
3911 if (errno != ECHILD) continue; /* Repeats the waitpid() */
3914 debug_printf("waitpid() returned -1/ECHILD: checking explicitly "
3915 "for process existence\n");
3917 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3919 if ((pid = parlist[poffset].pid) != 0 && kill(pid, 0) == 0)
3921 DEBUG(D_deliver) debug_printf("process %d still exists: assume "
3922 "stolen by strace\n", (int)pid);
3923 break; /* With poffset set */
3927 if (poffset >= remote_max_parallel)
3929 DEBUG(D_deliver) debug_printf("*** no delivery children found\n");
3930 return NULL; /* This is the error return */
3934 /* A pid value greater than 0 breaks the "while" loop. A negative value has
3935 been handled above. A return value of zero means that there is at least one
3936 subprocess, but there are no completed subprocesses. See if any pipes are
3937 ready with any data for reading. */
3939 DEBUG(D_deliver) debug_printf("selecting on subprocess pipes\n");
3942 FD_ZERO(&select_pipes);
3943 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3944 if (parlist[poffset].pid != 0)
3946 int fd = parlist[poffset].fd;
3947 FD_SET(fd, &select_pipes);
3948 if (fd > maxpipe) maxpipe = fd;
3951 /* Stick in a 60-second timeout, just in case. */
3956 readycount = select(maxpipe + 1, (SELECT_ARG2_TYPE *)&select_pipes,
3959 /* Scan through the pipes and read any that are ready; use the count
3960 returned by select() to stop when there are no more. Select() can return
3961 with no processes (e.g. if interrupted). This shouldn't matter.
3963 If par_read_pipe() returns TRUE, it means that either the terminating Z was
3964 read, or there was a disaster. In either case, we are finished with this
3965 process. Do an explicit wait() for the process and break the main loop if
3968 It turns out that we have to deal with the case of an interrupted system
3969 call, which can happen on some operating systems if the signal handling is
3970 set up to do that by default. */
3973 readycount > 0 && poffset < remote_max_parallel;
3976 if ( (pid = parlist[poffset].pid) != 0
3977 && FD_ISSET(parlist[poffset].fd, &select_pipes)
3981 if (par_read_pipe(poffset, FALSE)) /* Finished with this pipe */
3982 for (;;) /* Loop for signals */
3984 pid_t endedpid = waitpid(pid, &status, 0);
3985 if (endedpid == pid) goto PROCESS_DONE;
3986 if (endedpid != (pid_t)(-1) || errno != EINTR)
3987 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Unexpected error return "
3988 "%d (errno = %d) from waitpid() for process %d",
3989 (int)endedpid, errno, (int)pid);
3994 /* Now go back and look for a completed subprocess again. */
3997 /* A completed process was detected by the non-blocking waitpid(). Find the
3998 data block that corresponds to this subprocess. */
4000 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4001 if (pid == parlist[poffset].pid) break;
4003 /* Found the data block; this is a known remote delivery process. We don't
4004 need to repeat the outer loop. This should be what normally happens. */
4006 if (poffset < remote_max_parallel) break;
4008 /* This situation is an error, but it's probably better to carry on looking
4009 for another process than to give up (as we used to do). */
4011 log_write(0, LOG_MAIN|LOG_PANIC, "Process %d finished: not found in remote "
4012 "transport process list", pid);
4013 } /* End of the "for" loop */
4015 /* Come here when all the data was completely read after a select(), and
4016 the process in pid has been wait()ed for. */
4023 debug_printf("remote delivery process %d ended\n", (int)pid);
4025 debug_printf("remote delivery process %d ended: status=%04x\n", (int)pid,
4029 set_process_info("delivering %s", message_id);
4031 /* Get the chain of processed addresses */
4033 addrlist = parlist[poffset].addrlist;
4035 /* If the process did not finish cleanly, record an error and freeze (except
4036 for SIGTERM, SIGKILL and SIGQUIT), and also ensure the journal is not removed,
4037 in case the delivery did actually happen. */
4039 if ((status & 0xffff) != 0)
4042 int msb = (status >> 8) & 255;
4043 int lsb = status & 255;
4044 int code = (msb == 0)? (lsb & 0x7f) : msb;
4046 msg = string_sprintf("%s transport process returned non-zero status 0x%04x: "
4048 addrlist->transport->driver_name,
4050 (msb == 0)? "terminated by signal" : "exit code",
4053 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
4054 addrlist->special_action = SPECIAL_FREEZE;
4056 for (addr = addrlist; addr; addr = addr->next)
4058 addr->transport_return = DEFER;
4059 addr->message = msg;
4062 remove_journal = FALSE;
4065 /* Else complete reading the pipe to get the result of the delivery, if all
4066 the data has not yet been obtained. */
4068 else if (!parlist[poffset].done) (void)par_read_pipe(poffset, TRUE);
4070 /* Put the data count and return path into globals, mark the data slot unused,
4071 decrement the count of subprocesses, and return the address chain. */
4073 transport_count = parlist[poffset].transport_count;
4074 used_return_path = parlist[poffset].return_path;
4075 parlist[poffset].pid = 0;
4082 /*************************************************
4083 * Wait for subprocesses and post-process *
4084 *************************************************/
4086 /* This function waits for subprocesses until the number that are still running
4087 is below a given threshold. For each complete subprocess, the addresses are
4088 post-processed. If we can't find a running process, there is some shambles.
4089 Better not bomb out, as that might lead to multiple copies of the message. Just
4090 log and proceed as if all done.
4093 max maximum number of subprocesses to leave running
4094 fallback TRUE if processing fallback hosts
4100 par_reduce(int max, BOOL fallback)
4102 while (parcount > max)
4104 address_item *doneaddr = par_wait();
4107 log_write(0, LOG_MAIN|LOG_PANIC,
4108 "remote delivery process count got out of step");
4113 transport_instance * tp = doneaddr->transport;
4114 if (tp->max_parallel)
4115 enq_end(string_sprintf("tpt-serialize-%s", tp->name));
4117 remote_post_process(doneaddr, LOG_MAIN, NULL, fallback);
4123 rmt_dlv_checked_write(int fd, char id, char subid, void * buf, ssize_t size)
4125 uschar pipe_header[PIPE_HEADER_SIZE+1];
4126 size_t total_len = PIPE_HEADER_SIZE + size;
4128 struct iovec iov[2] = {
4129 { pipe_header, PIPE_HEADER_SIZE }, /* indication about the data to expect */
4130 { buf, size } /* *the* data */
4135 /* we assume that size can't get larger then BIG_BUFFER_SIZE which currently is set to 16k */
4136 /* complain to log if someone tries with buffer sizes we can't handle*/
4138 if (size > BIG_BUFFER_SIZE-1)
4140 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4141 "Failed writing transport result to pipe: can't handle buffers > %d bytes. truncating!\n",
4143 size = BIG_BUFFER_SIZE;
4146 /* Should we check that we do not write more than PIPE_BUF? What would
4149 /* convert size to human readable string prepended by id and subid */
4150 if (PIPE_HEADER_SIZE != snprintf(CS pipe_header, PIPE_HEADER_SIZE+1, "%c%c%05ld",
4151 id, subid, (long)size))
4152 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "header snprintf failed\n");
4154 DEBUG(D_deliver) debug_printf("header write id:%c,subid:%c,size:%ld,final:%s\n",
4155 id, subid, (long)size, pipe_header);
4157 if ((ret = writev(fd, iov, 2)) != total_len)
4158 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4159 "Failed writing transport result to pipe (%ld of %ld bytes): %s",
4160 (long)ret, (long)total_len, ret == -1 ? strerror(errno) : "short write");
4163 /*************************************************
4164 * Do remote deliveries *
4165 *************************************************/
4167 /* This function is called to process the addresses in addr_remote. We must
4168 pick off the queue all addresses that have the same transport, remote
4169 destination, and errors address, and hand them to the transport in one go,
4170 subject to some configured limitations. If this is a run to continue delivering
4171 to an existing delivery channel, skip all but those addresses that can go to
4172 that channel. The skipped addresses just get deferred.
4174 If mua_wrapper is set, all addresses must be able to be sent in a single
4175 transaction. If not, this function yields FALSE.
4177 In Exim 4, remote deliveries are always done in separate processes, even
4178 if remote_max_parallel = 1 or if there's only one delivery to do. The reason
4179 is so that the base process can retain privilege. This makes the
4180 implementation of fallback transports feasible (though not initially done.)
4182 We create up to the configured number of subprocesses, each of which passes
4183 back the delivery state via a pipe. (However, when sending down an existing
4184 connection, remote_max_parallel is forced to 1.)
4187 fallback TRUE if processing fallback hosts
4189 Returns: TRUE normally
4190 FALSE if mua_wrapper is set and the addresses cannot all be sent
4195 do_remote_deliveries(BOOL fallback)
4200 parcount = 0; /* Number of executing subprocesses */
4202 /* When sending down an existing channel, only do one delivery at a time.
4203 We use a local variable (parmax) to hold the maximum number of processes;
4204 this gets reduced from remote_max_parallel if we can't create enough pipes. */
4206 if (continue_transport) remote_max_parallel = 1;
4207 parmax = remote_max_parallel;
4209 /* If the data for keeping a list of processes hasn't yet been
4214 parlist = store_get(remote_max_parallel * sizeof(pardata), FALSE);
4215 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4216 parlist[poffset].pid = 0;
4219 /* Now loop for each remote delivery */
4221 for (int delivery_count = 0; addr_remote; delivery_count++)
4227 int address_count = 1;
4228 int address_count_max;
4230 BOOL use_initgroups;
4231 BOOL pipe_done = FALSE;
4232 transport_instance *tp;
4233 address_item **anchor = &addr_remote;
4234 address_item *addr = addr_remote;
4235 address_item *last = addr;
4238 uschar * serialize_key = NULL;
4240 /* Pull the first address right off the list. */
4242 addr_remote = addr->next;
4245 DEBUG(D_deliver|D_transport)
4246 debug_printf("--------> %s <--------\n", addr->address);
4248 /* If no transport has been set, there has been a big screw-up somewhere. */
4250 if (!(tp = addr->transport))
4252 f.disable_logging = FALSE; /* Jic */
4253 panicmsg = US"No transport set by router";
4254 goto panic_continue;
4257 /* Check that this base address hasn't previously been delivered to this
4258 transport. The check is necessary at this point to handle homonymic addresses
4259 correctly in cases where the pattern of redirection changes between delivery
4260 attempts. Non-homonymic previous delivery is detected earlier, at routing
4263 if (previously_transported(addr, FALSE)) continue;
4265 /* Force failure if the message is too big. */
4267 if (tp->message_size_limit)
4269 int rc = check_message_size(tp, addr);
4272 addr->transport_return = rc;
4273 remote_post_process(addr, LOG_MAIN, NULL, fallback);
4278 /* Get the flag which specifies whether the transport can handle different
4279 domains that nevertheless resolve to the same set of hosts. If it needs
4280 expanding, get variables set: $address_data, $domain_data, $localpart_data,
4281 $host, $host_address, $host_port. */
4282 if (tp->expand_multi_domain)
4283 deliver_set_expansions(addr);
4285 if (exp_bool(addr, US"transport", tp->name, D_transport,
4286 US"multi_domain", tp->multi_domain, tp->expand_multi_domain,
4287 &multi_domain) != OK)
4289 deliver_set_expansions(NULL);
4290 panicmsg = addr->message;
4291 goto panic_continue;
4294 /* Get the maximum it can handle in one envelope, with zero meaning
4295 unlimited, which is forced for the MUA wrapper case. */
4297 address_count_max = tp->max_addresses;
4298 if (address_count_max == 0 || mua_wrapper) address_count_max = 999999;
4301 /************************************************************************/
4302 /***** This is slightly experimental code, but should be safe. *****/
4304 /* The address_count_max value is the maximum number of addresses that the
4305 transport can send in one envelope. However, the transport must be capable of
4306 dealing with any number of addresses. If the number it gets exceeds its
4307 envelope limitation, it must send multiple copies of the message. This can be
4308 done over a single connection for SMTP, so uses less resources than making
4309 multiple connections. On the other hand, if remote_max_parallel is greater
4310 than one, it is perhaps a good idea to use parallel processing to move the
4311 message faster, even if that results in multiple simultaneous connections to
4314 How can we come to some compromise between these two ideals? What we do is to
4315 limit the number of addresses passed to a single instance of a transport to
4316 the greater of (a) its address limit (rcpt_max for SMTP) and (b) the total
4317 number of addresses routed to remote transports divided by
4318 remote_max_parallel. For example, if the message has 100 remote recipients,
4319 remote max parallel is 2, and rcpt_max is 10, we'd never send more than 50 at
4320 once. But if rcpt_max is 100, we could send up to 100.
4322 Of course, not all the remotely addresses in a message are going to go to the
4323 same set of hosts (except in smarthost configurations), so this is just a
4324 heuristic way of dividing up the work.
4326 Furthermore (1), because this may not be wanted in some cases, and also to
4327 cope with really pathological cases, there is also a limit to the number of
4328 messages that are sent over one connection. This is the same limit that is
4329 used when sending several different messages over the same connection.
4330 Continue_sequence is set when in this situation, to the number sent so
4331 far, including this message.
4333 Furthermore (2), when somebody explicitly sets the maximum value to 1, it
4334 is probably because they are using VERP, in which case they want to pass only
4335 one address at a time to the transport, in order to be able to use
4336 $local_part and $domain in constructing a new return path. We could test for
4337 the use of these variables, but as it is so likely they will be used when the
4338 maximum is 1, we don't bother. Just leave the value alone. */
4340 if ( address_count_max != 1
4341 && address_count_max < remote_delivery_count/remote_max_parallel
4344 int new_max = remote_delivery_count/remote_max_parallel;
4345 int message_max = tp->connection_max_messages;
4346 if (connection_max_messages >= 0) message_max = connection_max_messages;
4347 message_max -= continue_sequence - 1;
4348 if (message_max > 0 && new_max > address_count_max * message_max)
4349 new_max = address_count_max * message_max;
4350 address_count_max = new_max;
4353 /************************************************************************/
4356 /* Pick off all addresses which have the same transport, errors address,
4357 destination, and extra headers. In some cases they point to the same host
4358 list, but we also need to check for identical host lists generated from
4359 entirely different domains. The host list pointers can be NULL in the case
4360 where the hosts are defined in the transport. There is also a configured
4361 maximum limit of addresses that can be handled at once (see comments above
4362 for how it is computed).
4363 If the transport does not handle multiple domains, enforce that also,
4364 and if it might need a per-address check for this, re-evaluate it.
4367 while ((next = *anchor) && address_count < address_count_max)
4370 if ( (multi_domain || Ustrcmp(next->domain, addr->domain) == 0)
4371 && tp == next->transport
4372 && same_hosts(next->host_list, addr->host_list)
4373 && same_strings(next->prop.errors_address, addr->prop.errors_address)
4374 && same_headers(next->prop.extra_headers, addr->prop.extra_headers)
4375 && same_ugid(tp, next, addr)
4376 && ( next->prop.remove_headers == addr->prop.remove_headers
4377 || ( next->prop.remove_headers
4378 && addr->prop.remove_headers
4379 && Ustrcmp(next->prop.remove_headers, addr->prop.remove_headers) == 0
4383 (void)(!tp->expand_multi_domain || ((void)deliver_set_expansions(next), 1)),
4385 US"transport", next->transport->name, D_transport,
4386 US"multi_domain", next->transport->multi_domain,
4387 next->transport->expand_multi_domain, &md) == OK
4392 *anchor = next->next;
4394 next->first = addr; /* remember top one (for retry processing) */
4399 else anchor = &(next->next);
4400 deliver_set_expansions(NULL);
4403 /* If we are acting as an MUA wrapper, all addresses must go in a single
4404 transaction. If not, put them back on the chain and yield FALSE. */
4406 if (mua_wrapper && addr_remote)
4408 last->next = addr_remote;
4413 /* If the transport is limited for parallellism, enforce that here.
4414 The hints DB entry is decremented in par_reduce(), when we reap the
4415 transport process. */
4417 if (tpt_parallel_check(tp, addr, &serialize_key))
4418 if ((panicmsg = expand_string_message))
4419 goto panic_continue;
4421 continue; /* Loop for the next set of addresses. */
4423 /* Set up the expansion variables for this set of addresses */
4425 deliver_set_expansions(addr);
4427 /* Ensure any transport-set auth info is fresh */
4428 addr->authenticator = addr->auth_id = addr->auth_sndr = NULL;
4430 /* Compute the return path, expanding a new one if required. The old one
4431 must be set first, as it might be referred to in the expansion. */
4433 if(addr->prop.errors_address)
4434 return_path = addr->prop.errors_address;
4435 #ifdef EXPERIMENTAL_SRS
4436 else if(addr->prop.srs_sender)
4437 return_path = addr->prop.srs_sender;
4440 return_path = sender_address;
4442 if (tp->return_path)
4444 uschar *new_return_path = expand_string(tp->return_path);
4445 if (new_return_path)
4446 return_path = new_return_path;
4447 else if (!f.expand_string_forcedfail)
4449 panicmsg = string_sprintf("Failed to expand return path \"%s\": %s",
4450 tp->return_path, expand_string_message);
4455 /* Find the uid, gid, and use_initgroups setting for this transport. Failure
4456 logs and sets up error messages, so we just post-process and continue with
4457 the next address. */
4459 if (!findugid(addr, tp, &uid, &gid, &use_initgroups))
4465 /* If this transport has a setup function, call it now so that it gets
4466 run in this process and not in any subprocess. That way, the results of
4467 any setup that are retained by the transport can be reusable. One of the
4468 things the setup does is to set the fallback host lists in the addresses.
4469 That is why it is called at this point, before the continue delivery
4470 processing, because that might use the fallback hosts. */
4473 (void)((tp->setup)(addr->transport, addr, NULL, uid, gid, NULL));
4475 /* If we have a connection still open from a verify stage (lazy-close)
4476 treat it as if it is a continued connection (apart from the counter used
4477 for the log line mark). */
4479 if (cutthrough.cctx.sock >= 0 && cutthrough.callout_hold_only)
4482 debug_printf("lazy-callout-close: have conn still open from verification\n");
4483 continue_transport = cutthrough.transport;
4484 continue_hostname = string_copy(cutthrough.host.name);
4485 continue_host_address = string_copy(cutthrough.host.address);
4486 continue_sequence = 1;
4487 sending_ip_address = cutthrough.snd_ip;
4488 sending_port = cutthrough.snd_port;
4489 smtp_peer_options = cutthrough.peer_options;
4492 /* If this is a run to continue delivery down an already-established
4493 channel, check that this set of addresses matches the transport and
4494 the channel. If it does not, defer the addresses. If a host list exists,
4495 we must check that the continue host is on the list. Otherwise, the
4496 host is set in the transport. */
4498 f.continue_more = FALSE; /* In case got set for the last lot */
4499 if (continue_transport)
4501 BOOL ok = Ustrcmp(continue_transport, tp->name) == 0;
4503 /* If the transport is about to override the host list do not check
4504 it here but take the cost of running the transport process to discover
4505 if the continued_hostname connection is suitable. This is a layering
4506 violation which is unfortunate as it requires we haul in the smtp
4511 smtp_transport_options_block * ob;
4513 if ( !( Ustrcmp(tp->info->driver_name, "smtp") == 0
4514 && (ob = (smtp_transport_options_block *)tp->options_block)
4515 && ob->hosts_override && ob->hosts
4521 for (host_item * h = addr->host_list; h; h = h->next)
4522 if (Ustrcmp(h->name, continue_hostname) == 0)
4523 /*XXX should also check port here */
4524 { ok = TRUE; break; }
4528 /* Addresses not suitable; defer or queue for fallback hosts (which
4529 might be the continue host) and skip to next address. */
4533 DEBUG(D_deliver) debug_printf("not suitable for continue_transport (%s)\n",
4534 Ustrcmp(continue_transport, tp->name) != 0
4535 ? string_sprintf("tpt %s vs %s", continue_transport, tp->name)
4536 : string_sprintf("no host matching %s", continue_hostname));
4537 if (serialize_key) enq_end(serialize_key);
4539 if (addr->fallback_hosts && !fallback)
4541 for (next = addr; ; next = next->next)
4543 next->host_list = next->fallback_hosts;
4544 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", next->address);
4545 if (!next->next) break;
4547 next->next = addr_fallback;
4548 addr_fallback = addr;
4553 for (next = addr; ; next = next->next)
4555 DEBUG(D_deliver) debug_printf(" %s to def list\n", next->address);
4556 if (!next->next) break;
4558 next->next = addr_defer;
4565 /* Set a flag indicating whether there are further addresses that list
4566 the continued host. This tells the transport to leave the channel open,
4567 but not to pass it to another delivery process. We'd like to do that
4568 for non-continue_transport cases too but the knowlege of which host is
4569 connected to is too hard to manage. Perhaps we need a finer-grain
4570 interface to the transport. */
4572 for (next = addr_remote; next && !f.continue_more; next = next->next)
4573 for (host_item * h = next->host_list; h; h = h->next)
4574 if (Ustrcmp(h->name, continue_hostname) == 0)
4575 { f.continue_more = TRUE; break; }
4578 /* The transports set up the process info themselves as they may connect
4579 to more than one remote machine. They also have to set up the filter
4580 arguments, if required, so that the host name and address are available
4583 transport_filter_argv = NULL;
4585 /* Create the pipe for inter-process communication. If pipe creation
4586 fails, it is probably because the value of remote_max_parallel is so
4587 large that too many file descriptors for pipes have been created. Arrange
4588 to wait for a process to finish, and then try again. If we still can't
4589 create a pipe when all processes have finished, break the retry loop. */
4593 if (pipe(pfd) == 0) pipe_done = TRUE;
4594 else if (parcount > 0) parmax = parcount;
4597 /* We need to make the reading end of the pipe non-blocking. There are
4598 two different options for this. Exim is cunningly (I hope!) coded so
4599 that it can use either of them, though it prefers O_NONBLOCK, which
4600 distinguishes between EOF and no-more-data. */
4602 /* The data appears in a timely manner and we already did a select on
4603 all pipes, so I do not see a reason to use non-blocking IO here
4606 (void)fcntl(pfd[pipe_read], F_SETFL, O_NONBLOCK);
4608 (void)fcntl(pfd[pipe_read], F_SETFL, O_NDELAY);
4612 /* If the maximum number of subprocesses already exist, wait for a process
4613 to finish. If we ran out of file descriptors, parmax will have been reduced
4614 from its initial value of remote_max_parallel. */
4616 par_reduce(parmax - 1, fallback);
4619 /* If we failed to create a pipe and there were no processes to wait
4620 for, we have to give up on this one. Do this outside the above loop
4621 so that we can continue the main loop. */
4625 panicmsg = string_sprintf("unable to create pipe: %s", strerror(errno));
4629 /* Find a free slot in the pardata list. Must do this after the possible
4630 waiting for processes to finish, because a terminating process will free
4633 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4634 if (parlist[poffset].pid == 0)
4637 /* If there isn't one, there has been a horrible disaster. */
4639 if (poffset >= remote_max_parallel)
4641 (void)close(pfd[pipe_write]);
4642 (void)close(pfd[pipe_read]);
4643 panicmsg = US"Unexpectedly no free subprocess slot";
4647 /* Now fork a subprocess to do the remote delivery, but before doing so,
4648 ensure that any cached resources are released so as not to interfere with
4649 what happens in the subprocess. */
4653 if ((pid = exim_fork(US"transport")) == 0)
4655 int fd = pfd[pipe_write];
4658 /* Setting this global in the subprocess means we need never clear it */
4659 transport_name = tp->name;
4661 /* There are weird circumstances in which logging is disabled */
4662 f.disable_logging = tp->disable_logging;
4664 /* Show pids on debug output if parallelism possible */
4666 if (parmax > 1 && (parcount > 0 || addr_remote))
4667 DEBUG(D_any|D_v) debug_selector |= D_pid;
4669 /* Reset the random number generator, so different processes don't all
4670 have the same sequence. In the test harness we want different, but
4671 predictable settings for each delivery process, so do something explicit
4672 here rather they rely on the fixed reset in the random number function. */
4674 random_seed = f.running_in_test_harness ? 42 + 2*delivery_count : 0;
4676 /* Set close-on-exec on the pipe so that it doesn't get passed on to
4677 a new process that may be forked to do another delivery down the same
4680 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
4682 /* Close open file descriptors for the pipes of other processes
4683 that are running in parallel. */
4685 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4686 if (parlist[poffset].pid != 0) (void)close(parlist[poffset].fd);
4688 /* This process has inherited a copy of the file descriptor
4689 for the data file, but its file pointer is shared with all the
4690 other processes running in parallel. Therefore, we have to re-open
4691 the file in order to get a new file descriptor with its own
4692 file pointer. We don't need to lock it, as the lock is held by
4693 the parent process. There doesn't seem to be any way of doing
4694 a dup-with-new-file-pointer. */
4696 (void)close(deliver_datafile);
4698 uschar * fname = spool_fname(US"input", message_subdir, message_id, US"-D");
4700 if ((deliver_datafile = Uopen(fname,
4704 O_RDWR | O_APPEND, 0)) < 0)
4705 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to reopen %s for remote "
4706 "parallel delivery: %s", fname, strerror(errno));
4709 /* Set the close-on-exec flag */
4711 (void)fcntl(deliver_datafile, F_SETFD, fcntl(deliver_datafile, F_GETFD) |
4715 /* Set the uid/gid of this process; bombs out on failure. */
4717 exim_setugid(uid, gid, use_initgroups,
4718 string_sprintf("remote delivery to %s with transport=%s",
4719 addr->address, tp->name));
4721 /* Close the unwanted half of this process' pipe, set the process state,
4722 and run the transport. Afterwards, transport_count will contain the number
4723 of bytes written. */
4725 (void)close(pfd[pipe_read]);
4726 set_process_info("delivering %s using %s", message_id, tp->name);
4727 debug_print_string(tp->debug_string);
4728 if (!(tp->info->code)(addr->transport, addr)) replicate_status(addr);
4730 set_process_info("delivering %s (just run %s for %s%s in subprocess)",
4731 message_id, tp->name, addr->address, addr->next ? ", ..." : "");
4733 /* Ensure any cached resources that we used are now released */
4737 /* Pass the result back down the pipe. This is a lot more information
4738 than is needed for a local delivery. We have to send back the error
4739 status for each address, the usability status for each host that is
4740 flagged as unusable, and all the retry items. When TLS is in use, we
4741 send also the cipher and peerdn information. Each type of information
4742 is flagged by an identifying byte, and is then in a fixed format (with
4743 strings terminated by zeros), and there is a final terminator at the
4744 end. The host information and retry information is all attached to
4745 the first address, so that gets sent at the start. */
4747 /* Host unusability information: for most success cases this will
4750 for (h = addr->host_list; h; h = h->next)
4752 if (!h->address || h->status < hstatus_unusable) continue;
4753 sprintf(CS big_buffer, "%c%c%s", h->status, h->why, h->address);
4754 rmt_dlv_checked_write(fd, 'H', '0', big_buffer, Ustrlen(big_buffer+2) + 3);
4757 /* The number of bytes written. This is the same for each address. Even
4758 if we sent several copies of the message down the same connection, the
4759 size of each one is the same, and it's that value we have got because
4760 transport_count gets reset before calling transport_write_message(). */
4762 memcpy(big_buffer, &transport_count, sizeof(transport_count));
4763 rmt_dlv_checked_write(fd, 'S', '0', big_buffer, sizeof(transport_count));
4765 /* Information about what happened to each address. Four item types are
4766 used: an optional 'X' item first, for TLS information, then an optional "C"
4767 item for any client-auth info followed by 'R' items for any retry settings,
4768 and finally an 'A' item for the remaining data. */
4770 for(; addr; addr = addr->next)
4774 /* The certificate verification status goes into the flags */
4775 if (tls_out.certificate_verified) setflag(addr, af_cert_verified);
4777 if (tls_out.dane_verified) setflag(addr, af_dane_verified);
4779 # ifdef EXPERIMENTAL_TLS_RESUME
4780 if (tls_out.resumption & RESUME_USED) setflag(addr, af_tls_resume);
4783 /* Use an X item only if there's something to send */
4787 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", addr->cipher) + 1;
4791 ptr += sprintf(CS ptr, "%.512s", addr->peerdn) + 1;
4793 rmt_dlv_checked_write(fd, 'X', '1', big_buffer, ptr - big_buffer);
4795 else if (continue_proxy_cipher)
4797 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", continue_proxy_cipher) + 1;
4799 rmt_dlv_checked_write(fd, 'X', '1', big_buffer, ptr - big_buffer);
4805 if (tls_export_cert(ptr, big_buffer_size-2, addr->peercert))
4809 rmt_dlv_checked_write(fd, 'X', '2', big_buffer, ptr - big_buffer);
4814 if (tls_export_cert(ptr, big_buffer_size-2, addr->ourcert))
4818 rmt_dlv_checked_write(fd, 'X', '3', big_buffer, ptr - big_buffer);
4820 # ifndef DISABLE_OCSP
4821 if (addr->ocsp > OCSP_NOT_REQ)
4823 ptr = big_buffer + sprintf(CS big_buffer, "%c", addr->ocsp + '0') + 1;
4824 rmt_dlv_checked_write(fd, 'X', '4', big_buffer, ptr - big_buffer);
4827 #endif /*DISABLE_TLS*/
4829 if (client_authenticator)
4831 ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticator) + 1;
4832 rmt_dlv_checked_write(fd, 'C', '1', big_buffer, ptr - big_buffer);
4834 if (client_authenticated_id)
4836 ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticated_id) + 1;
4837 rmt_dlv_checked_write(fd, 'C', '2', big_buffer, ptr - big_buffer);
4839 if (client_authenticated_sender)
4841 ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticated_sender) + 1;
4842 rmt_dlv_checked_write(fd, 'C', '3', big_buffer, ptr - big_buffer);
4845 #ifndef DISABLE_PRDR
4846 if (testflag(addr, af_prdr_used))
4847 rmt_dlv_checked_write(fd, 'P', '0', NULL, 0);
4850 if (testflag(addr, af_pipelining))
4851 #ifndef DISABLE_PIPE_CONNECT
4852 if (testflag(addr, af_early_pipe))
4853 rmt_dlv_checked_write(fd, 'L', '2', NULL, 0);
4856 rmt_dlv_checked_write(fd, 'L', '1', NULL, 0);
4858 if (testflag(addr, af_chunking_used))
4859 rmt_dlv_checked_write(fd, 'K', '0', NULL, 0);
4861 if (testflag(addr, af_tcp_fastopen_conn))
4862 rmt_dlv_checked_write(fd, 'T',
4863 testflag(addr, af_tcp_fastopen) ? testflag(addr, af_tcp_fastopen_data)
4867 memcpy(big_buffer, &addr->dsn_aware, sizeof(addr->dsn_aware));
4868 rmt_dlv_checked_write(fd, 'D', '0', big_buffer, sizeof(addr->dsn_aware));
4870 /* Retry information: for most success cases this will be null. */
4872 for (retry_item * r = addr->retries; r; r = r->next)
4874 sprintf(CS big_buffer, "%c%.500s", r->flags, r->key);
4875 ptr = big_buffer + Ustrlen(big_buffer+2) + 3;
4876 memcpy(ptr, &r->basic_errno, sizeof(r->basic_errno));
4877 ptr += sizeof(r->basic_errno);
4878 memcpy(ptr, &r->more_errno, sizeof(r->more_errno));
4879 ptr += sizeof(r->more_errno);
4880 if (!r->message) *ptr++ = 0; else
4882 sprintf(CS ptr, "%.512s", r->message);
4885 rmt_dlv_checked_write(fd, 'R', '0', big_buffer, ptr - big_buffer);
4888 #ifdef SUPPORT_SOCKS
4889 if (LOGGING(proxy) && proxy_session)
4892 if (proxy_local_address)
4894 DEBUG(D_deliver) debug_printf("proxy_local_address '%s'\n", proxy_local_address);
4895 ptr = big_buffer + sprintf(CS ptr, "%.128s", proxy_local_address) + 1;
4896 DEBUG(D_deliver) debug_printf("proxy_local_port %d\n", proxy_local_port);
4897 memcpy(ptr, &proxy_local_port, sizeof(proxy_local_port));
4898 ptr += sizeof(proxy_local_port);
4902 rmt_dlv_checked_write(fd, 'A', '2', big_buffer, ptr - big_buffer);
4906 #ifdef EXPERIMENTAL_DSN_INFO
4907 /*um, are they really per-addr? Other per-conn stuff is not (auth, tls). But host_used is! */
4908 if (addr->smtp_greeting)
4910 DEBUG(D_deliver) debug_printf("smtp_greeting '%s'\n", addr->smtp_greeting);
4911 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", addr->smtp_greeting) + 1;
4912 if (addr->helo_response)
4914 DEBUG(D_deliver) debug_printf("helo_response '%s'\n", addr->helo_response);
4915 ptr += sprintf(CS ptr, "%.128s", addr->helo_response) + 1;
4919 rmt_dlv_checked_write(fd, 'A', '1', big_buffer, ptr - big_buffer);
4923 /* The rest of the information goes in an 'A0' item. */
4925 sprintf(CS big_buffer, "%c%c", addr->transport_return, addr->special_action);
4926 ptr = big_buffer + 2;
4927 memcpy(ptr, &addr->basic_errno, sizeof(addr->basic_errno));
4928 ptr += sizeof(addr->basic_errno);
4929 memcpy(ptr, &addr->more_errno, sizeof(addr->more_errno));
4930 ptr += sizeof(addr->more_errno);
4931 memcpy(ptr, &addr->delivery_time, sizeof(addr->delivery_time));
4932 ptr += sizeof(addr->delivery_time);
4933 memcpy(ptr, &addr->flags, sizeof(addr->flags));
4934 ptr += sizeof(addr->flags);
4936 if (!addr->message) *ptr++ = 0; else
4937 ptr += sprintf(CS ptr, "%.1024s", addr->message) + 1;
4939 if (!addr->user_message) *ptr++ = 0; else
4940 ptr += sprintf(CS ptr, "%.1024s", addr->user_message) + 1;
4942 if (!addr->host_used) *ptr++ = 0; else
4944 ptr += sprintf(CS ptr, "%.256s", addr->host_used->name) + 1;
4945 ptr += sprintf(CS ptr, "%.64s", addr->host_used->address) + 1;
4946 memcpy(ptr, &addr->host_used->port, sizeof(addr->host_used->port));
4947 ptr += sizeof(addr->host_used->port);
4949 /* DNS lookup status */
4950 *ptr++ = addr->host_used->dnssec==DS_YES ? '2'
4951 : addr->host_used->dnssec==DS_NO ? '1' : '0';
4954 rmt_dlv_checked_write(fd, 'A', '0', big_buffer, ptr - big_buffer);
4957 /* Local interface address/port */
4958 #ifdef EXPERIMENTAL_DSN_INFO
4959 if (sending_ip_address)
4961 if (LOGGING(incoming_interface) && sending_ip_address)
4965 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", sending_ip_address) + 1;
4966 ptr += sprintf(CS ptr, "%d", sending_port) + 1;
4967 rmt_dlv_checked_write(fd, 'I', '0', big_buffer, ptr - big_buffer);
4970 /* Add termination flag, close the pipe, and that's it. The character
4971 after 'Z' indicates whether continue_transport is now NULL or not.
4972 A change from non-NULL to NULL indicates a problem with a continuing
4975 big_buffer[0] = continue_transport ? '1' : '0';
4976 rmt_dlv_checked_write(fd, 'Z', '0', big_buffer, 1);
4981 /* Back in the mainline: close the unwanted half of the pipe. */
4983 (void)close(pfd[pipe_write]);
4985 /* If we have a connection still open from a verify stage (lazy-close)
4986 release its TLS library context (if any) as responsibility was passed to
4987 the delivery child process. */
4989 if (cutthrough.cctx.sock >= 0 && cutthrough.callout_hold_only)
4992 if (cutthrough.is_tls)
4993 tls_close(cutthrough.cctx.tls_ctx, TLS_NO_SHUTDOWN);
4995 (void) close(cutthrough.cctx.sock);
4996 release_cutthrough_connection(US"passed to transport proc");
4999 /* Fork failed; defer with error message */
5003 (void)close(pfd[pipe_read]);
5004 panicmsg = string_sprintf("fork failed for remote delivery to %s: %s",
5005 addr->domain, strerror(errno));
5009 /* Fork succeeded; increment the count, and remember relevant data for
5010 when the process finishes. */
5013 parlist[poffset].addrlist = parlist[poffset].addr = addr;
5014 parlist[poffset].pid = pid;
5015 parlist[poffset].fd = pfd[pipe_read];
5016 parlist[poffset].done = FALSE;
5017 parlist[poffset].msg = NULL;
5018 parlist[poffset].return_path = return_path;
5020 /* If the process we've just started is sending a message down an existing
5021 channel, wait for it now. This ensures that only one such process runs at
5022 once, whatever the value of remote_max parallel. Otherwise, we might try to
5023 send two or more messages simultaneously down the same channel. This could
5024 happen if there are different domains that include the same host in otherwise
5025 different host lists.
5027 Also, if the transport closes down the channel, this information gets back
5028 (continue_transport gets set to NULL) before we consider any other addresses
5031 if (continue_transport) par_reduce(0, fallback);
5033 /* Otherwise, if we are running in the test harness, wait a bit, to let the
5034 newly created process get going before we create another process. This should
5035 ensure repeatability in the tests. Wait long enough for most cases to complete
5038 else testharness_pause_ms(600);
5043 if (serialize_key) enq_end(serialize_key);
5045 remote_post_process(addr, LOG_MAIN|LOG_PANIC, panicmsg, fallback);
5049 /* Reached the end of the list of addresses. Wait for all the subprocesses that
5050 are still running and post-process their addresses. */
5052 par_reduce(0, fallback);
5059 /*************************************************
5060 * Split an address into local part and domain *
5061 *************************************************/
5063 /* This function initializes an address for routing by splitting it up into a
5064 local part and a domain. The local part is set up twice - once in its original
5065 casing, and once in lower case, and it is dequoted. We also do the "percent
5066 hack" for configured domains. This may lead to a DEFER result if a lookup
5067 defers. When a percent-hacking takes place, we insert a copy of the original
5068 address as a new parent of this address, as if we have had a redirection.
5071 addr points to an addr_item block containing the address
5074 DEFER - could not determine if domain is %-hackable
5078 deliver_split_address(address_item * addr)
5080 uschar * address = addr->address;
5085 if (!(domain = Ustrrchr(address, '@')))
5086 return DEFER; /* should always have a domain, but just in case... */
5088 len = domain - address;
5089 addr->domain = string_copylc(domain+1); /* Domains are always caseless */
5091 /* The implication in the RFCs (though I can't say I've seen it spelled out
5092 explicitly) is that quoting should be removed from local parts at the point
5093 where they are locally interpreted. [The new draft "821" is more explicit on
5094 this, Jan 1999.] We know the syntax is valid, so this can be done by simply
5095 removing quoting backslashes and any unquoted doublequotes. */
5097 t = addr->cc_local_part = store_get(len+1, is_tainted(address));
5101 if (c == '\"') continue;
5111 /* We do the percent hack only for those domains that are listed in
5112 percent_hack_domains. A loop is required, to copy with multiple %-hacks. */
5114 if (percent_hack_domains)
5117 uschar *new_address = NULL;
5118 uschar *local_part = addr->cc_local_part;
5120 deliver_domain = addr->domain; /* set $domain */
5122 while ( (rc = match_isinlist(deliver_domain, (const uschar **)&percent_hack_domains, 0,
5123 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
5125 && (t = Ustrrchr(local_part, '%')) != NULL
5128 new_address = string_copy(local_part);
5129 new_address[t - local_part] = '@';
5130 deliver_domain = string_copylc(t+1);
5131 local_part = string_copyn(local_part, t - local_part);
5134 if (rc == DEFER) return DEFER; /* lookup deferred */
5136 /* If hackery happened, set up new parent and alter the current address. */
5140 address_item *new_parent = store_get(sizeof(address_item), FALSE);
5141 *new_parent = *addr;
5142 addr->parent = new_parent;
5143 new_parent->child_count = 1;
5144 addr->address = new_address;
5145 addr->unique = string_copy(new_address);
5146 addr->domain = deliver_domain;
5147 addr->cc_local_part = local_part;
5148 DEBUG(D_deliver) debug_printf("%%-hack changed address to: %s\n",
5153 /* Create the lowercased version of the final local part, and make that the
5154 default one to be used. */
5156 addr->local_part = addr->lc_local_part = string_copylc(addr->cc_local_part);
5163 /*************************************************
5164 * Get next error message text *
5165 *************************************************/
5167 /* If f is not NULL, read the next "paragraph", from a customized error message
5168 text file, terminated by a line containing ****, and expand it.
5171 f NULL or a file to read from
5172 which string indicating which string (for errors)
5174 Returns: NULL or an expanded string
5178 next_emf(FILE *f, uschar *which)
5184 if (!f) return NULL;
5186 if (!Ufgets(buffer, sizeof(buffer), f) || Ustrcmp(buffer, "****\n") == 0)
5189 para = string_get(256);
5192 para = string_cat(para, buffer);
5193 if (!Ufgets(buffer, sizeof(buffer), f) || Ustrcmp(buffer, "****\n") == 0)
5196 if ((yield = expand_string(string_from_gstring(para))))
5199 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand string from "
5200 "bounce_message_file or warn_message_file (%s): %s", which,
5201 expand_string_message);
5208 /*************************************************
5209 * Close down a passed transport channel *
5210 *************************************************/
5212 /* This function is called when a passed transport channel cannot be used.
5213 It attempts to close it down tidily. The yield is always DELIVER_NOT_ATTEMPTED
5214 so that the function call can be the argument of a "return" statement.
5217 Returns: DELIVER_NOT_ATTEMPTED
5221 continue_closedown(void)
5223 if (continue_transport)
5224 for (transport_instance * t = transports; t; t = t->next)
5225 if (Ustrcmp(t->name, continue_transport) == 0)
5227 if (t->info->closedown) (t->info->closedown)(t);
5230 return DELIVER_NOT_ATTEMPTED;
5236 /*************************************************
5237 * Print address information *
5238 *************************************************/
5240 /* This function is called to output an address, or information about an
5241 address, for bounce or defer messages. If the hide_child flag is set, all we
5242 output is the original ancestor address.
5245 addr points to the address
5246 f the FILE to print to
5247 si an initial string
5248 sc a continuation string for before "generated"
5251 Returns: TRUE if the address is not hidden
5255 print_address_information(address_item *addr, FILE *f, uschar *si, uschar *sc,
5259 uschar *printed = US"";
5260 address_item *ancestor = addr;
5261 while (ancestor->parent) ancestor = ancestor->parent;
5263 fprintf(f, "%s", CS si);
5265 if (addr->parent && testflag(addr, af_hide_child))
5267 printed = US"an undisclosed address";
5270 else if (!testflag(addr, af_pfr) || !addr->parent)
5271 printed = addr->address;
5275 uschar *s = addr->address;
5278 if (addr->address[0] == '>') { ss = US"mail"; s++; }
5279 else if (addr->address[0] == '|') ss = US"pipe";
5282 fprintf(f, "%s to %s%sgenerated by ", ss, s, sc);
5283 printed = addr->parent->address;
5286 fprintf(f, "%s", CS string_printing(printed));
5288 if (ancestor != addr)
5290 uschar *original = ancestor->onetime_parent;
5291 if (!original) original= ancestor->address;
5292 if (strcmpic(original, printed) != 0)
5293 fprintf(f, "%s(%sgenerated from %s)", sc,
5294 ancestor != addr->parent ? "ultimately " : "",
5295 string_printing(original));
5298 if (addr->host_used)
5299 fprintf(f, "\n host %s [%s]",
5300 addr->host_used->name, addr->host_used->address);
5302 fprintf(f, "%s", CS se);
5310 /*************************************************
5311 * Print error for an address *
5312 *************************************************/
5314 /* This function is called to print the error information out of an address for
5315 a bounce or a warning message. It tries to format the message reasonably by
5316 introducing newlines. All lines are indented by 4; the initial printing
5317 position must be set before calling.
5319 This function used always to print the error. Nowadays we want to restrict it
5320 to cases such as LMTP/SMTP errors from a remote host, and errors from :fail:
5321 and filter "fail". We no longer pass other information willy-nilly in bounce
5322 and warning messages. Text in user_message is always output; text in message
5323 only if the af_pass_message flag is set.
5327 f the FILE to print on
5334 print_address_error(address_item *addr, FILE *f, uschar *t)
5336 int count = Ustrlen(t);
5337 uschar *s = testflag(addr, af_pass_message) ? addr->message : NULL;
5339 if (!s && !(s = addr->user_message))
5342 fprintf(f, "\n %s", t);
5345 if (*s == '\\' && s[1] == 'n')
5355 if (*s++ == ':' && isspace(*s) && count > 45)
5357 fprintf(f, "\n "); /* sic (because space follows) */
5364 /***********************************************************
5365 * Print Diagnostic-Code for an address *
5366 ************************************************************/
5368 /* This function is called to print the error information out of an address for
5369 a bounce or a warning message. It tries to format the message reasonably as
5370 required by RFC 3461 by adding a space after each newline
5372 it uses the same logic as print_address_error() above. if af_pass_message is true
5373 and addr->message is set it uses the remote host answer. if not addr->user_message
5374 is used instead if available.
5378 f the FILE to print on
5384 print_dsn_diagnostic_code(const address_item *addr, FILE *f)
5386 uschar * s = testflag(addr, af_pass_message) ? addr->message : NULL;
5389 /* af_pass_message and addr->message set ? print remote host answer */
5393 debug_printf("DSN Diagnostic-Code: addr->message = %s\n", addr->message);
5395 /* search first ": ". we assume to find the remote-MTA answer there */
5396 if (!(s = Ustrstr(addr->message, ": ")))
5397 return; /* not found, bail out */
5398 s += 2; /* skip ": " */
5399 cnt = fprintf(f, "Diagnostic-Code: smtp; ");
5401 /* no message available. do nothing */
5406 if (cnt > 950) /* RFC line length limit: 998 */
5408 DEBUG(D_deliver) debug_printf("print_dsn_diagnostic_code() truncated line\n");
5409 fputs("[truncated]", f);
5413 if (*s == '\\' && s[1] == 'n')
5415 fputs("\n ", f); /* as defined in RFC 3461 */
5430 /*************************************************
5431 * Check list of addresses for duplication *
5432 *************************************************/
5434 /* This function was introduced when the test for duplicate addresses that are
5435 not pipes, files, or autoreplies was moved from the middle of routing to when
5436 routing was complete. That was to fix obscure cases when the routing history
5437 affects the subsequent routing of identical addresses. This function is called
5438 after routing, to check that the final routed addresses are not duplicates.
5440 If we detect a duplicate, we remember what it is a duplicate of. Note that
5441 pipe, file, and autoreply de-duplication is handled during routing, so we must
5442 leave such "addresses" alone here, as otherwise they will incorrectly be
5445 Argument: address of list anchor
5450 do_duplicate_check(address_item **anchor)
5453 while ((addr = *anchor))
5456 if (testflag(addr, af_pfr))
5458 anchor = &(addr->next);
5460 else if ((tnode = tree_search(tree_duplicates, addr->unique)))
5462 DEBUG(D_deliver|D_route)
5463 debug_printf("%s is a duplicate address: discarded\n", addr->unique);
5464 *anchor = addr->next;
5465 addr->dupof = tnode->data.ptr;
5466 addr->next = addr_duplicate;
5467 addr_duplicate = addr;
5471 tree_add_duplicate(addr->unique, addr);
5472 anchor = &(addr->next);
5480 /************************************************/
5483 print_dsn_addr_action(FILE * f, address_item * addr,
5484 uschar * action, uschar * status)
5488 if (addr->dsn_orcpt)
5489 fprintf(f,"Original-Recipient: %s\n", addr->dsn_orcpt);
5491 for (pa = addr; pa->parent; ) pa = pa->parent;
5492 fprintf(f, "Action: %s\n"
5493 "Final-Recipient: rfc822;%s\n"
5495 action, pa->address, status);
5500 /* When running in the test harness, there's an option that allows us to
5501 fudge this time so as to get repeatability of the tests. Take the first
5502 time off the list. In queue runs, the list pointer gets updated in the
5506 test_harness_fudged_queue_time(int actual_time)
5509 if ( f.running_in_test_harness && *fudged_queue_times
5510 && (qt = readconf_readtime(fudged_queue_times, '/', FALSE)) >= 0)
5512 DEBUG(D_deliver) debug_printf("fudged queue_times = %s\n",
5513 fudged_queue_times);
5519 /************************************************/
5522 expand_open(const uschar * filename,
5523 const uschar * varname, const uschar * reason)
5525 const uschar * s = expand_cstring(filename);
5529 log_write(0, LOG_MAIN|LOG_PANIC,
5530 "Failed to expand %s: '%s'\n", varname, filename);
5531 else if (*s != '/' || is_tainted(s))
5532 log_write(0, LOG_MAIN|LOG_PANIC,
5533 "%s is not %s after expansion: '%s'\n",
5534 varname, *s == '/' ? "untainted" : "absolute", s);
5535 else if (!(fp = Ufopen(s, "rb")))
5536 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for %s "
5537 "message texts: %s", s, reason, strerror(errno));
5541 /*************************************************
5542 * Deliver one message *
5543 *************************************************/
5545 /* This is the function which is called when a message is to be delivered. It
5546 is passed the id of the message. It is possible that the message no longer
5547 exists, if some other process has delivered it, and it is also possible that
5548 the message is being worked on by another process, in which case the data file
5551 If no delivery is attempted for any of the above reasons, the function returns
5552 DELIVER_NOT_ATTEMPTED.
5554 If the give_up flag is set true, do not attempt any deliveries, but instead
5555 fail all outstanding addresses and return the message to the sender (or
5558 A delivery operation has a process all to itself; we never deliver more than
5559 one message in the same process. Therefore we needn't worry too much about
5562 Liable to be called as root.
5565 id the id of the message to be delivered
5566 forced TRUE if delivery was forced by an administrator; this overrides
5567 retry delays and causes a delivery to be tried regardless
5568 give_up TRUE if an administrator has requested that delivery attempts
5571 Returns: When the global variable mua_wrapper is FALSE:
5572 DELIVER_ATTEMPTED_NORMAL if a delivery attempt was made
5573 DELIVER_NOT_ATTEMPTED otherwise (see comment above)
5574 When the global variable mua_wrapper is TRUE:
5575 DELIVER_MUA_SUCCEEDED if delivery succeeded
5576 DELIVER_MUA_FAILED if delivery failed
5577 DELIVER_NOT_ATTEMPTED if not attempted (should not occur)
5581 deliver_message(uschar *id, BOOL forced, BOOL give_up)
5584 int final_yield = DELIVER_ATTEMPTED_NORMAL;
5585 time_t now = time(NULL);
5586 address_item *addr_last = NULL;
5587 uschar *filter_message = NULL;
5588 int process_recipients = RECIP_ACCEPT;
5591 extern int acl_where;
5594 #ifdef MEASURE_TIMING
5595 report_time_since(×tamp_startup, US"delivery start"); /* testcase 0022, 2100 */
5598 info = queue_run_pid == (pid_t)0
5599 ? string_sprintf("delivering %s", id)
5600 : string_sprintf("delivering %s (queue run pid %d)", id, queue_run_pid);
5602 /* If the D_process_info bit is on, set_process_info() will output debugging
5603 information. If not, we want to show this initial information if D_deliver or
5604 D_queue_run is set or in verbose mode. */
5606 set_process_info("%s", info);
5608 if ( !(debug_selector & D_process_info)
5609 && (debug_selector & (D_deliver|D_queue_run|D_v))
5611 debug_printf("%s\n", info);
5613 /* Ensure that we catch any subprocesses that are created. Although Exim
5614 sets SIG_DFL as its initial default, some routes through the code end up
5615 here with it set to SIG_IGN - cases where a non-synchronous delivery process
5616 has been forked, but no re-exec has been done. We use sigaction rather than
5617 plain signal() on those OS where SA_NOCLDWAIT exists, because we want to be
5618 sure it is turned off. (There was a problem on AIX with this.) */
5622 struct sigaction act;
5623 act.sa_handler = SIG_DFL;
5624 sigemptyset(&(act.sa_mask));
5626 sigaction(SIGCHLD, &act, NULL);
5629 signal(SIGCHLD, SIG_DFL);
5632 /* Make the forcing flag available for routers and transports, set up the
5633 global message id field, and initialize the count for returned files and the
5634 message size. This use of strcpy() is OK because the length id is checked when
5635 it is obtained from a command line (the -M or -q options), and otherwise it is
5636 known to be a valid message id. */
5638 if (id != message_id)
5639 Ustrcpy(message_id, id);
5640 f.deliver_force = forced;
5644 /* Initialize some flags */
5646 update_spool = FALSE;
5647 remove_journal = TRUE;
5649 /* Set a known context for any ACLs we call via expansions */
5650 acl_where = ACL_WHERE_DELIVERY;
5652 /* Reset the random number generator, so that if several delivery processes are
5653 started from a queue runner that has already used random numbers (for sorting),
5654 they don't all get the same sequence. */
5658 /* Open and lock the message's data file. Exim locks on this one because the
5659 header file may get replaced as it is re-written during the delivery process.
5660 Any failures cause messages to be written to the log, except for missing files
5661 while queue running - another process probably completed delivery. As part of
5662 opening the data file, message_subdir gets set. */
5664 if ((deliver_datafile = spool_open_datafile(id)) < 0)
5665 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5667 /* The value of message_size at this point has been set to the data length,
5668 plus one for the blank line that notionally precedes the data. */
5670 /* Now read the contents of the header file, which will set up the headers in
5671 store, and also the list of recipients and the tree of non-recipients and
5672 assorted flags. It updates message_size. If there is a reading or format error,
5673 give up; if the message has been around for sufficiently long, remove it. */
5676 uschar * spoolname = string_sprintf("%s-H", id);
5677 if ((rc = spool_read_header(spoolname, TRUE, TRUE)) != spool_read_OK)
5679 if (errno == ERRNO_SPOOLFORMAT)
5681 struct stat statbuf;
5682 if (Ustat(spool_fname(US"input", message_subdir, spoolname, US""),
5684 log_write(0, LOG_MAIN, "Format error in spool file %s: "
5685 "size=" OFF_T_FMT, spoolname, statbuf.st_size);
5687 log_write(0, LOG_MAIN, "Format error in spool file %s", spoolname);
5690 log_write(0, LOG_MAIN, "Error reading spool file %s: %s", spoolname,
5693 /* If we managed to read the envelope data, received_time contains the
5694 time the message was received. Otherwise, we can calculate it from the
5697 if (rc != spool_read_hdrerror)
5699 received_time.tv_sec = received_time.tv_usec = 0;
5700 /*XXX subsec precision?*/
5701 for (i = 0; i < 6; i++)
5702 received_time.tv_sec = received_time.tv_sec * BASE_62 + tab62[id[i] - '0'];
5705 /* If we've had this malformed message too long, sling it. */
5707 if (now - received_time.tv_sec > keep_malformed)
5709 Uunlink(spool_fname(US"msglog", message_subdir, id, US""));
5710 Uunlink(spool_fname(US"input", message_subdir, id, US"-D"));
5711 Uunlink(spool_fname(US"input", message_subdir, id, US"-H"));
5712 Uunlink(spool_fname(US"input", message_subdir, id, US"-J"));
5713 log_write(0, LOG_MAIN, "Message removed because older than %s",
5714 readconf_printtime(keep_malformed));
5717 (void)close(deliver_datafile);
5718 deliver_datafile = -1;
5719 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5723 /* The spool header file has been read. Look to see if there is an existing
5724 journal file for this message. If there is, it means that a previous delivery
5725 attempt crashed (program or host) before it could update the spool header file.
5726 Read the list of delivered addresses from the journal and add them to the
5727 nonrecipients tree. Then update the spool file. We can leave the journal in
5728 existence, as it will get further successful deliveries added to it in this
5729 run, and it will be deleted if this function gets to its end successfully.
5730 Otherwise it might be needed again. */
5733 uschar * fname = spool_fname(US"input", message_subdir, id, US"-J");
5736 if ( (journal_fd = Uopen(fname, O_RDWR|O_APPEND
5744 && lseek(journal_fd, 0, SEEK_SET) == 0
5745 && (jread = fdopen(journal_fd, "rb"))
5748 while (Ufgets(big_buffer, big_buffer_size, jread))
5750 int n = Ustrlen(big_buffer);
5751 big_buffer[n-1] = 0;
5752 tree_add_nonrecipient(big_buffer);
5753 DEBUG(D_deliver) debug_printf("Previously delivered address %s taken from "
5754 "journal file\n", big_buffer);
5757 if ((journal_fd = dup(fileno(jread))) < 0)
5758 journal_fd = fileno(jread);
5760 (void) fclose(jread); /* Try to not leak the FILE resource */
5762 /* Panic-dies on error */
5763 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
5765 else if (errno != ENOENT)
5767 log_write(0, LOG_MAIN|LOG_PANIC, "attempt to open journal for reading gave: "
5768 "%s", strerror(errno));
5769 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5772 /* A null recipients list indicates some kind of disaster. */
5774 if (!recipients_list)
5776 (void)close(deliver_datafile);
5777 deliver_datafile = -1;
5778 log_write(0, LOG_MAIN, "Spool error: no recipients for %s", fname);
5779 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5784 /* Handle a message that is frozen. There are a number of different things that
5785 can happen, but in the default situation, unless forced, no delivery is
5788 if (f.deliver_freeze)
5790 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
5791 /* Moving to another directory removes the message from Exim's view. Other
5792 tools must be used to deal with it. Logging of this action happens in
5793 spool_move_message() and its subfunctions. */
5795 if ( move_frozen_messages
5796 && spool_move_message(id, message_subdir, US"", US"F")
5798 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5801 /* For all frozen messages (bounces or not), timeout_frozen_after sets the
5802 maximum time to keep messages that are frozen. Thaw if we reach it, with a
5803 flag causing all recipients to be failed. The time is the age of the
5804 message, not the time since freezing. */
5806 if (timeout_frozen_after > 0 && message_age >= timeout_frozen_after)
5808 log_write(0, LOG_MAIN, "cancelled by timeout_frozen_after");
5809 process_recipients = RECIP_FAIL_TIMEOUT;
5812 /* For bounce messages (and others with no sender), thaw if the error message
5813 ignore timer is exceeded. The message will be discarded if this delivery
5816 else if (!*sender_address && message_age >= ignore_bounce_errors_after)
5817 log_write(0, LOG_MAIN, "Unfrozen by errmsg timer");
5819 /* If this is a bounce message, or there's no auto thaw, or we haven't
5820 reached the auto thaw time yet, and this delivery is not forced by an admin
5821 user, do not attempt delivery of this message. Note that forced is set for
5822 continuing messages down the same channel, in order to skip load checking and
5823 ignore hold domains, but we don't want unfreezing in that case. */
5827 if ( ( sender_address[0] == 0
5829 || now <= deliver_frozen_at + auto_thaw
5831 && ( !forced || !f.deliver_force_thaw
5832 || !f.admin_user || continue_hostname
5835 (void)close(deliver_datafile);
5836 deliver_datafile = -1;
5837 log_write(L_skip_delivery, LOG_MAIN, "Message is frozen");
5838 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5841 /* If delivery was forced (by an admin user), assume a manual thaw.
5842 Otherwise it's an auto thaw. */
5846 f.deliver_manual_thaw = TRUE;
5847 log_write(0, LOG_MAIN, "Unfrozen by forced delivery");
5849 else log_write(0, LOG_MAIN, "Unfrozen by auto-thaw");
5852 /* We get here if any of the rules for unfreezing have triggered. */
5854 f.deliver_freeze = FALSE;
5855 update_spool = TRUE;
5859 /* Open the message log file if we are using them. This records details of
5860 deliveries, deferments, and failures for the benefit of the mail administrator.
5861 The log is not used by exim itself to track the progress of a message; that is
5862 done by rewriting the header spool file. */
5866 uschar * fname = spool_fname(US"msglog", message_subdir, id, US"");
5870 if ((fd = open_msglog_file(fname, SPOOL_MODE, &error)) < 0)
5872 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't %s message log %s: %s", error,
5873 fname, strerror(errno));
5874 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5877 /* Make a C stream out of it. */
5879 if (!(message_log = fdopen(fd, "a")))
5881 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't fdopen message log %s: %s",
5882 fname, strerror(errno));
5883 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5888 /* If asked to give up on a message, log who did it, and set the action for all
5893 struct passwd *pw = getpwuid(real_uid);
5894 log_write(0, LOG_MAIN, "cancelled by %s",
5895 pw ? US pw->pw_name : string_sprintf("uid %ld", (long int)real_uid));
5896 process_recipients = RECIP_FAIL;
5899 /* Otherwise, if there are too many Received: headers, fail all recipients. */
5901 else if (received_count > received_headers_max)
5902 process_recipients = RECIP_FAIL_LOOP;
5904 /* Otherwise, if a system-wide, address-independent message filter is
5905 specified, run it now, except in the case when we are failing all recipients as
5906 a result of timeout_frozen_after. If the system filter yields "delivered", then
5907 ignore the true recipients of the message. Failure of the filter file is
5908 logged, and the delivery attempt fails. */
5910 else if (system_filter && process_recipients != RECIP_FAIL_TIMEOUT)
5915 redirect_block redirect;
5917 if (system_filter_uid_set)
5919 ugid.uid = system_filter_uid;
5920 ugid.gid = system_filter_gid;
5921 ugid.uid_set = ugid.gid_set = TRUE;
5924 ugid.uid_set = ugid.gid_set = FALSE;
5926 return_path = sender_address;
5927 f.enable_dollar_recipients = TRUE; /* Permit $recipients in system filter */
5928 f.system_filtering = TRUE;
5930 /* Any error in the filter file causes a delivery to be abandoned. */
5932 redirect.string = system_filter;
5933 redirect.isfile = TRUE;
5934 redirect.check_owner = redirect.check_group = FALSE;
5935 redirect.owners = NULL;
5936 redirect.owngroups = NULL;
5938 redirect.modemask = 0;
5940 DEBUG(D_deliver|D_filter) debug_printf("running system filter\n");
5943 &redirect, /* Where the data is */
5944 RDO_DEFER | /* Turn on all the enabling options */
5945 RDO_FAIL | /* Leave off all the disabling options */
5950 NULL, /* No :include: restriction (not used in filter) */
5951 NULL, /* No sieve vacation directory (not sieve!) */
5952 NULL, /* No sieve enotify mailto owner (not sieve!) */
5953 NULL, /* No sieve user address (not sieve!) */
5954 NULL, /* No sieve subaddress (not sieve!) */
5955 &ugid, /* uid/gid data */
5956 &addr_new, /* Where to hang generated addresses */
5957 &filter_message, /* Where to put error message */
5958 NULL, /* Don't skip syntax errors */
5959 &filtertype, /* Will always be set to FILTER_EXIM for this call */
5960 US"system filter"); /* For error messages */
5962 DEBUG(D_deliver|D_filter) debug_printf("system filter returned %d\n", rc);
5964 if (rc == FF_ERROR || rc == FF_NONEXIST)
5966 (void)close(deliver_datafile);
5967 deliver_datafile = -1;
5968 log_write(0, LOG_MAIN|LOG_PANIC, "Error in system filter: %s",
5969 string_printing(filter_message));
5970 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5973 /* Reset things. If the filter message is an empty string, which can happen
5974 for a filter "fail" or "freeze" command with no text, reset it to NULL. */
5976 f.system_filtering = FALSE;
5977 f.enable_dollar_recipients = FALSE;
5978 if (filter_message && filter_message[0] == 0) filter_message = NULL;
5980 /* Save the values of the system filter variables so that user filters
5983 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5985 /* The filter can request that delivery of the original addresses be
5990 process_recipients = RECIP_DEFER;
5991 deliver_msglog("Delivery deferred by system filter\n");
5992 log_write(0, LOG_MAIN, "Delivery deferred by system filter");
5995 /* The filter can request that a message be frozen, but this does not
5996 take place if the message has been manually thawed. In that case, we must
5997 unset "delivered", which is forced by the "freeze" command to make -bF
6000 else if (rc == FF_FREEZE && !f.deliver_manual_thaw)
6002 f.deliver_freeze = TRUE;
6003 deliver_frozen_at = time(NULL);
6004 process_recipients = RECIP_DEFER;
6005 frozen_info = string_sprintf(" by the system filter%s%s",
6006 filter_message ? US": " : US"",
6007 filter_message ? filter_message : US"");
6010 /* The filter can request that a message be failed. The error message may be
6011 quite long - it is sent back to the sender in the bounce - but we don't want
6012 to fill up the log with repetitions of it. If it starts with << then the text
6013 between << and >> is written to the log, with the rest left for the bounce
6016 else if (rc == FF_FAIL)
6018 uschar *colon = US"";
6019 uschar *logmsg = US"";
6022 process_recipients = RECIP_FAIL_FILTER;
6028 if ( filter_message[0] == '<'
6029 && filter_message[1] == '<'
6030 && (logend = Ustrstr(filter_message, ">>"))
6033 logmsg = filter_message + 2;
6034 loglen = logend - logmsg;
6035 filter_message = logend + 2;
6036 if (filter_message[0] == 0) filter_message = NULL;
6040 logmsg = filter_message;
6041 loglen = Ustrlen(filter_message);
6045 log_write(0, LOG_MAIN, "cancelled by system filter%s%.*s", colon, loglen,
6049 /* Delivery can be restricted only to those recipients (if any) that the
6050 filter specified. */
6052 else if (rc == FF_DELIVERED)
6054 process_recipients = RECIP_IGNORE;
6056 log_write(0, LOG_MAIN, "original recipients ignored (system filter)");
6058 log_write(0, LOG_MAIN, "=> discarded (system filter)");
6061 /* If any new addresses were created by the filter, fake up a "parent"
6062 for them. This is necessary for pipes, etc., which are expected to have
6063 parents, and it also gives some sensible logging for others. Allow
6064 pipes, files, and autoreplies, and run them as the filter uid if set,
6065 otherwise as the current uid. */
6069 int uid = system_filter_uid_set ? system_filter_uid : geteuid();
6070 int gid = system_filter_gid_set ? system_filter_gid : getegid();
6072 /* The text "system-filter" is tested in transport_set_up_command() and in
6073 set_up_shell_command() in the pipe transport, to enable them to permit
6074 $recipients, so don't change it here without also changing it there. */
6076 address_item *p = addr_new;
6077 address_item *parent = deliver_make_addr(US"system-filter", FALSE);
6079 parent->domain = string_copylc(qualify_domain_recipient);
6080 parent->local_part = US"system-filter";
6082 /* As part of this loop, we arrange for addr_last to end up pointing
6083 at the final address. This is used if we go on to add addresses for the
6084 original recipients. */
6088 if (parent->child_count == USHRT_MAX)
6089 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "system filter generated more "
6090 "than %d delivery addresses", USHRT_MAX);
6091 parent->child_count++;
6094 if (testflag(p, af_pfr))
6100 setflag(p, af_uid_set);
6101 setflag(p, af_gid_set);
6102 setflag(p, af_allow_file);
6103 setflag(p, af_allow_pipe);
6104 setflag(p, af_allow_reply);
6106 /* Find the name of the system filter's appropriate pfr transport */
6108 if (p->address[0] == '|')
6111 tpname = system_filter_pipe_transport;
6112 address_pipe = p->address;
6114 else if (p->address[0] == '>')
6117 tpname = system_filter_reply_transport;
6121 if (p->address[Ustrlen(p->address)-1] == '/')
6123 type = US"directory";
6124 tpname = system_filter_directory_transport;
6129 tpname = system_filter_file_transport;
6131 address_file = p->address;
6134 /* Now find the actual transport, first expanding the name. We have
6135 set address_file or address_pipe above. */
6139 uschar *tmp = expand_string(tpname);
6140 address_file = address_pipe = NULL;
6142 p->message = string_sprintf("failed to expand \"%s\" as a "
6143 "system filter transport name", tpname);
6144 if (is_tainted(tmp))
6145 p->message = string_sprintf("attempt to used tainted value '%s' for"
6146 "transport '%s' as a system filter", tmp, tpname);
6150 p->message = string_sprintf("system_filter_%s_transport is unset",
6155 transport_instance *tp;
6156 for (tp = transports; tp; tp = tp->next)
6157 if (Ustrcmp(tp->name, tpname) == 0)
6163 p->message = string_sprintf("failed to find \"%s\" transport "
6164 "for system filter delivery", tpname);
6167 /* If we couldn't set up a transport, defer the delivery, putting the
6168 error on the panic log as well as the main log. */
6172 address_item *badp = p;
6174 if (!addr_last) addr_new = p; else addr_last->next = p;
6175 badp->local_part = badp->address; /* Needed for log line */
6176 post_process_one(badp, DEFER, LOG_MAIN|LOG_PANIC, EXIM_DTYPE_ROUTER, 0);
6179 } /* End of pfr handling */
6181 /* Either a non-pfr delivery, or we found a transport */
6183 DEBUG(D_deliver|D_filter)
6184 debug_printf("system filter added %s\n", p->address);
6188 } /* Loop through all addr_new addresses */
6193 /* Scan the recipients list, and for every one that is not in the non-
6194 recipients tree, add an addr item to the chain of new addresses. If the pno
6195 value is non-negative, we must set the onetime parent from it. This which
6196 points to the relevant entry in the recipients list.
6198 This processing can be altered by the setting of the process_recipients
6199 variable, which is changed if recipients are to be ignored, failed, or
6200 deferred. This can happen as a result of system filter activity, or if the -Mg
6201 option is used to fail all of them.
6203 Duplicate addresses are handled later by a different tree structure; we can't
6204 just extend the non-recipients tree, because that will be re-written to the
6205 spool if the message is deferred, and in any case there are casing
6206 complications for local addresses. */
6208 if (process_recipients != RECIP_IGNORE)
6209 for (i = 0; i < recipients_count; i++)
6210 if (!tree_search(tree_nonrecipients, recipients_list[i].address))
6212 recipient_item *r = recipients_list + i;
6213 address_item *new = deliver_make_addr(r->address, FALSE);
6214 new->prop.errors_address = r->errors_to;
6216 if ((new->prop.utf8_msg = message_smtputf8))
6218 new->prop.utf8_downcvt = message_utf8_downconvert == 1;
6219 new->prop.utf8_downcvt_maybe = message_utf8_downconvert == -1;
6220 DEBUG(D_deliver) debug_printf("utf8, downconvert %s\n",
6221 new->prop.utf8_downcvt ? "yes"
6222 : new->prop.utf8_downcvt_maybe ? "ifneeded"
6228 new->onetime_parent = recipients_list[r->pno].address;
6230 /* If DSN support is enabled, set the dsn flags and the original receipt
6231 to be passed on to other DSN enabled MTAs */
6233 new->dsn_flags = r->dsn_flags & rf_dsnflags;
6234 new->dsn_orcpt = r->orcpt;
6235 DEBUG(D_deliver) debug_printf("DSN: set orcpt: %s flags: 0x%x\n",
6236 new->dsn_orcpt ? new->dsn_orcpt : US"", new->dsn_flags);
6238 switch (process_recipients)
6240 /* RECIP_DEFER is set when a system filter freezes a message. */
6243 new->next = addr_defer;
6248 /* RECIP_FAIL_FILTER is set when a system filter has obeyed a "fail"
6251 case RECIP_FAIL_FILTER:
6253 filter_message ? filter_message : US"delivery cancelled";
6254 setflag(new, af_pass_message);
6255 goto RECIP_QUEUE_FAILED; /* below */
6258 /* RECIP_FAIL_TIMEOUT is set when a message is frozen, but is older
6259 than the value in timeout_frozen_after. Treat non-bounce messages
6260 similarly to -Mg; for bounce messages we just want to discard, so
6261 don't put the address on the failed list. The timeout has already
6264 case RECIP_FAIL_TIMEOUT:
6265 new->message = US"delivery cancelled; message timed out";
6266 goto RECIP_QUEUE_FAILED; /* below */
6269 /* RECIP_FAIL is set when -Mg has been used. */
6272 new->message = US"delivery cancelled by administrator";
6275 /* Common code for the failure cases above. If this is not a bounce
6276 message, put the address on the failed list so that it is used to
6277 create a bounce. Otherwise do nothing - this just discards the address.
6278 The incident has already been logged. */
6281 if (sender_address[0])
6283 new->next = addr_failed;
6289 /* RECIP_FAIL_LOOP is set when there are too many Received: headers
6290 in the message. Process each address as a routing failure; if this
6291 is a bounce message, it will get frozen. */
6293 case RECIP_FAIL_LOOP:
6294 new->message = US"Too many \"Received\" headers - suspected mail loop";
6295 post_process_one(new, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6299 /* Value should be RECIP_ACCEPT; take this as the safe default. */
6302 if (!addr_new) addr_new = new; else addr_last->next = new;
6307 #ifndef DISABLE_EVENT
6308 if (process_recipients != RECIP_ACCEPT && event_action)
6310 uschar * save_local = deliver_localpart;
6311 const uschar * save_domain = deliver_domain;
6312 uschar * addr = new->address, * errmsg = NULL;
6313 int start, end, dom;
6315 if (!parse_extract_address(addr, &errmsg, &start, &end, &dom, TRUE))
6316 log_write(0, LOG_MAIN|LOG_PANIC,
6317 "failed to parse address '%.100s': %s\n", addr, errmsg);
6321 string_copyn(addr+start, dom ? (dom-1) - start : end - start);
6322 deliver_domain = dom ? CUS string_copyn(addr+dom, end - dom) : CUS"";
6324 event_raise(event_action, US"msg:fail:internal", new->message);
6326 deliver_localpart = save_local;
6327 deliver_domain = save_domain;
6335 debug_printf("Delivery address list:\n");
6336 for (address_item * p = addr_new; p; p = p->next)
6337 debug_printf(" %s %s\n", p->address,
6338 p->onetime_parent ? p->onetime_parent : US"");
6341 /* Set up the buffers used for copying over the file when delivering. */
6343 deliver_in_buffer = store_malloc(DELIVER_IN_BUFFER_SIZE);
6344 deliver_out_buffer = store_malloc(DELIVER_OUT_BUFFER_SIZE);
6348 /* Until there are no more new addresses, handle each one as follows:
6350 . If this is a generated address (indicated by the presence of a parent
6351 pointer) then check to see whether it is a pipe, file, or autoreply, and
6352 if so, handle it directly here. The router that produced the address will
6353 have set the allow flags into the address, and also set the uid/gid required.
6354 Having the routers generate new addresses and then checking them here at
6355 the outer level is tidier than making each router do the checking, and
6356 means that routers don't need access to the failed address queue.
6358 . Break up the address into local part and domain, and make lowercased
6359 versions of these strings. We also make unquoted versions of the local part.
6361 . Handle the percent hack for those domains for which it is valid.
6363 . For child addresses, determine if any of the parents have the same address.
6364 If so, generate a different string for previous delivery checking. Without
6365 this code, if the address spqr generates spqr via a forward or alias file,
6366 delivery of the generated spqr stops further attempts at the top level spqr,
6367 which is not what is wanted - it may have generated other addresses.
6369 . Check on the retry database to see if routing was previously deferred, but
6370 only if in a queue run. Addresses that are to be routed are put on the
6371 addr_route chain. Addresses that are to be deferred are put on the
6372 addr_defer chain. We do all the checking first, so as not to keep the
6373 retry database open any longer than necessary.
6375 . Now we run the addresses through the routers. A router may put the address
6376 on either the addr_local or the addr_remote chain for local or remote
6377 delivery, respectively, or put it on the addr_failed chain if it is
6378 undeliveable, or it may generate child addresses and put them on the
6379 addr_new chain, or it may defer an address. All the chain anchors are
6380 passed as arguments so that the routers can be called for verification
6383 . If new addresses have been generated by the routers, da capo.
6386 f.header_rewritten = FALSE; /* No headers rewritten yet */
6387 while (addr_new) /* Loop until all addresses dealt with */
6389 address_item *addr, *parent;
6391 /* Failure to open the retry database is treated the same as if it does
6392 not exist. In both cases, dbm_file is NULL. */
6394 if (!(dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE, TRUE)))
6395 DEBUG(D_deliver|D_retry|D_route|D_hints_lookup)
6396 debug_printf("no retry data available\n");
6398 /* Scan the current batch of new addresses, to handle pipes, files and
6399 autoreplies, and determine which others are ready for routing. */
6406 dbdata_retry *domain_retry_record;
6407 dbdata_retry *address_retry_record;
6410 addr_new = addr->next;
6412 DEBUG(D_deliver|D_retry|D_route)
6414 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
6415 debug_printf("Considering: %s\n", addr->address);
6418 /* Handle generated address that is a pipe or a file or an autoreply. */
6420 if (testflag(addr, af_pfr))
6422 /* If an autoreply in a filter could not generate a syntactically valid
6423 address, give up forthwith. Set af_ignore_error so that we don't try to
6424 generate a bounce. */
6426 if (testflag(addr, af_bad_reply))
6428 addr->basic_errno = ERRNO_BADADDRESS2;
6429 addr->local_part = addr->address;
6431 US"filter autoreply generated syntactically invalid recipient";
6432 addr->prop.ignore_error = TRUE;
6433 (void) post_process_one(addr, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6434 continue; /* with the next new address */
6437 /* If two different users specify delivery to the same pipe or file or
6438 autoreply, there should be two different deliveries, so build a unique
6439 string that incorporates the original address, and use this for
6440 duplicate testing and recording delivery, and also for retrying. */
6443 string_sprintf("%s:%s", addr->address, addr->parent->unique +
6444 (testflag(addr->parent, af_homonym)? 3:0));
6446 addr->address_retry_key = addr->domain_retry_key =
6447 string_sprintf("T:%s", addr->unique);
6449 /* If a filter file specifies two deliveries to the same pipe or file,
6450 we want to de-duplicate, but this is probably not wanted for two mail
6451 commands to the same address, where probably both should be delivered.
6452 So, we have to invent a different unique string in that case. Just
6453 keep piling '>' characters on the front. */
6455 if (addr->address[0] == '>')
6456 while (tree_search(tree_duplicates, addr->unique))
6457 addr->unique = string_sprintf(">%s", addr->unique);
6459 else if ((tnode = tree_search(tree_duplicates, addr->unique)))
6461 DEBUG(D_deliver|D_route)
6462 debug_printf("%s is a duplicate address: discarded\n", addr->address);
6463 addr->dupof = tnode->data.ptr;
6464 addr->next = addr_duplicate;
6465 addr_duplicate = addr;
6469 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
6471 /* Check for previous delivery */
6473 if (tree_search(tree_nonrecipients, addr->unique))
6475 DEBUG(D_deliver|D_route)
6476 debug_printf("%s was previously delivered: discarded\n", addr->address);
6477 child_done(addr, tod_stamp(tod_log));
6481 /* Save for checking future duplicates */
6483 tree_add_duplicate(addr->unique, addr);
6485 /* Set local part and domain */
6487 addr->local_part = addr->address;
6488 addr->domain = addr->parent->domain;
6490 /* Ensure that the delivery is permitted. */
6492 if (testflag(addr, af_file))
6494 if (!testflag(addr, af_allow_file))
6496 addr->basic_errno = ERRNO_FORBIDFILE;
6497 addr->message = US"delivery to file forbidden";
6498 (void)post_process_one(addr, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6499 continue; /* with the next new address */
6502 else if (addr->address[0] == '|')
6504 if (!testflag(addr, af_allow_pipe))
6506 addr->basic_errno = ERRNO_FORBIDPIPE;
6507 addr->message = US"delivery to pipe forbidden";
6508 (void)post_process_one(addr, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6509 continue; /* with the next new address */
6512 else if (!testflag(addr, af_allow_reply))
6514 addr->basic_errno = ERRNO_FORBIDREPLY;
6515 addr->message = US"autoreply forbidden";
6516 (void)post_process_one(addr, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6517 continue; /* with the next new address */
6520 /* If the errno field is already set to BADTRANSPORT, it indicates
6521 failure to expand a transport string, or find the associated transport,
6522 or an unset transport when one is required. Leave this test till now so
6523 that the forbid errors are given in preference. */
6525 if (addr->basic_errno == ERRNO_BADTRANSPORT)
6527 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6531 /* Treat /dev/null as a special case and abandon the delivery. This
6532 avoids having to specify a uid on the transport just for this case.
6533 Arrange for the transport name to be logged as "**bypassed**". */
6535 if (Ustrcmp(addr->address, "/dev/null") == 0)
6537 uschar *save = addr->transport->name;
6538 addr->transport->name = US"**bypassed**";
6539 (void)post_process_one(addr, OK, LOG_MAIN, EXIM_DTYPE_TRANSPORT, '=');
6540 addr->transport->name = save;
6541 continue; /* with the next new address */
6544 /* Pipe, file, or autoreply delivery is to go ahead as a normal local
6547 DEBUG(D_deliver|D_route)
6548 debug_printf("queued for %s transport\n", addr->transport->name);
6549 addr->next = addr_local;
6551 continue; /* with the next new address */
6554 /* Handle normal addresses. First, split up into local part and domain,
6555 handling the %-hack if necessary. There is the possibility of a defer from
6556 a lookup in percent_hack_domains. */
6558 if ((rc = deliver_split_address(addr)) == DEFER)
6560 addr->message = US"cannot check percent_hack_domains";
6561 addr->basic_errno = ERRNO_LISTDEFER;
6562 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_NONE, 0);
6566 /* Check to see if the domain is held. If so, proceed only if the
6567 delivery was forced by hand. */
6569 deliver_domain = addr->domain; /* set $domain */
6570 if ( !forced && hold_domains
6571 && (rc = match_isinlist(addr->domain, (const uschar **)&hold_domains, 0,
6572 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE,
6578 addr->message = US"hold_domains lookup deferred";
6579 addr->basic_errno = ERRNO_LISTDEFER;
6583 addr->message = US"domain is held";
6584 addr->basic_errno = ERRNO_HELD;
6586 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_NONE, 0);
6590 /* Now we can check for duplicates and previously delivered addresses. In
6591 order to do this, we have to generate a "unique" value for each address,
6592 because there may be identical actual addresses in a line of descendents.
6593 The "unique" field is initialized to the same value as the "address" field,
6594 but gets changed here to cope with identically-named descendents. */
6596 for (parent = addr->parent; parent; parent = parent->parent)
6597 if (strcmpic(addr->address, parent->address) == 0) break;
6599 /* If there's an ancestor with the same name, set the homonym flag. This
6600 influences how deliveries are recorded. Then add a prefix on the front of
6601 the unique address. We use \n\ where n starts at 0 and increases each time.
6602 It is unlikely to pass 9, but if it does, it may look odd but will still
6603 work. This means that siblings or cousins with the same names are treated
6604 as duplicates, which is what we want. */
6608 setflag(addr, af_homonym);
6609 if (parent->unique[0] != '\\')
6610 addr->unique = string_sprintf("\\0\\%s", addr->address);
6612 addr->unique = string_sprintf("\\%c\\%s", parent->unique[1] + 1,
6616 /* Ensure that the domain in the unique field is lower cased, because
6617 domains are always handled caselessly. */
6619 p = Ustrrchr(addr->unique, '@');
6620 while (*p != 0) { *p = tolower(*p); p++; }
6622 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
6624 if (tree_search(tree_nonrecipients, addr->unique))
6626 DEBUG(D_deliver|D_route)
6627 debug_printf("%s was previously delivered: discarded\n", addr->unique);
6628 child_done(addr, tod_stamp(tod_log));
6632 /* Get the routing retry status, saving the two retry keys (with and
6633 without the local part) for subsequent use. If there is no retry record for
6634 the standard address routing retry key, we look for the same key with the
6635 sender attached, because this form is used by the smtp transport after a
6636 4xx response to RCPT when address_retry_include_sender is true. */
6638 addr->domain_retry_key = string_sprintf("R:%s", addr->domain);
6639 addr->address_retry_key = string_sprintf("R:%s@%s", addr->local_part,
6644 domain_retry_record = dbfn_read(dbm_file, addr->domain_retry_key);
6645 if ( domain_retry_record
6646 && now - domain_retry_record->time_stamp > retry_data_expire
6649 DEBUG(D_deliver|D_retry)
6650 debug_printf("domain retry record present but expired\n");
6651 domain_retry_record = NULL; /* Ignore if too old */
6654 address_retry_record = dbfn_read(dbm_file, addr->address_retry_key);
6655 if ( address_retry_record
6656 && now - address_retry_record->time_stamp > retry_data_expire
6659 DEBUG(D_deliver|D_retry)
6660 debug_printf("address retry record present but expired\n");
6661 address_retry_record = NULL; /* Ignore if too old */
6664 if (!address_retry_record)
6666 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
6668 address_retry_record = dbfn_read(dbm_file, altkey);
6669 if ( address_retry_record
6670 && now - address_retry_record->time_stamp > retry_data_expire)
6672 DEBUG(D_deliver|D_retry)
6673 debug_printf("address<sender> retry record present but expired\n");
6674 address_retry_record = NULL; /* Ignore if too old */
6679 domain_retry_record = address_retry_record = NULL;
6681 DEBUG(D_deliver|D_retry)
6683 if (!domain_retry_record)
6684 debug_printf("no domain retry record\n");
6686 debug_printf("have domain retry record; next_try = now%+d\n",
6687 f.running_in_test_harness ? 0 :
6688 (int)(domain_retry_record->next_try - now));
6690 if (!address_retry_record)
6691 debug_printf("no address retry record\n");
6693 debug_printf("have address retry record; next_try = now%+d\n",
6694 f.running_in_test_harness ? 0 :
6695 (int)(address_retry_record->next_try - now));
6698 /* If we are sending a message down an existing SMTP connection, we must
6699 assume that the message which created the connection managed to route
6700 an address to that connection. We do not want to run the risk of taking
6701 a long time over routing here, because if we do, the server at the other
6702 end of the connection may time it out. This is especially true for messages
6703 with lots of addresses. For this kind of delivery, queue_running is not
6704 set, so we would normally route all addresses. We take a pragmatic approach
6705 and defer routing any addresses that have any kind of domain retry record.
6706 That is, we don't even look at their retry times. It doesn't matter if this
6707 doesn't work occasionally. This is all just an optimization, after all.
6709 The reason for not doing the same for address retries is that they normally
6710 arise from 4xx responses, not DNS timeouts. */
6712 if (continue_hostname && domain_retry_record)
6714 addr->message = US"reusing SMTP connection skips previous routing defer";
6715 addr->basic_errno = ERRNO_RRETRY;
6716 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6718 addr->message = domain_retry_record->text;
6719 setflag(addr, af_pass_message);
6722 /* If we are in a queue run, defer routing unless there is no retry data or
6723 we've passed the next retry time, or this message is forced. In other
6724 words, ignore retry data when not in a queue run.
6726 However, if the domain retry time has expired, always allow the routing
6727 attempt. If it fails again, the address will be failed. This ensures that
6728 each address is routed at least once, even after long-term routing
6731 If there is an address retry, check that too; just wait for the next
6732 retry time. This helps with the case when the temporary error on the
6733 address was really message-specific rather than address specific, since
6734 it allows other messages through.
6736 We also wait for the next retry time if this is a message sent down an
6737 existing SMTP connection (even though that will be forced). Otherwise there
6738 will be far too many attempts for an address that gets a 4xx error. In
6739 fact, after such an error, we should not get here because, the host should
6740 not be remembered as one this message needs. However, there was a bug that
6741 used to cause this to happen, so it is best to be on the safe side.
6743 Even if we haven't reached the retry time in the hints, there is one more
6744 check to do, which is for the ultimate address timeout. We only do this
6745 check if there is an address retry record and there is not a domain retry
6746 record; this implies that previous attempts to handle the address had the
6747 retry_use_local_parts option turned on. We use this as an approximation
6748 for the destination being like a local delivery, for example delivery over
6749 LMTP to an IMAP message store. In this situation users are liable to bump
6750 into their quota and thereby have intermittently successful deliveries,
6751 which keep the retry record fresh, which can lead to us perpetually
6752 deferring messages. */
6754 else if ( ( f.queue_running && !f.deliver_force
6755 || continue_hostname
6757 && ( ( domain_retry_record
6758 && now < domain_retry_record->next_try
6759 && !domain_retry_record->expired
6761 || ( address_retry_record
6762 && now < address_retry_record->next_try
6764 && ( domain_retry_record
6765 || !address_retry_record
6766 || !retry_ultimate_address_timeout(addr->address_retry_key,
6767 addr->domain, address_retry_record, now)
6770 addr->message = US"retry time not reached";
6771 addr->basic_errno = ERRNO_RRETRY;
6772 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6774 /* For remote-retry errors (here and just above) that we've not yet
6775 hit the retry time, use the error recorded in the retry database
6776 as info in the warning message. This lets us send a message even
6777 when we're not failing on a fresh attempt. We assume that this
6778 info is not sensitive. */
6780 addr->message = domain_retry_record
6781 ? domain_retry_record->text : address_retry_record->text;
6782 setflag(addr, af_pass_message);
6785 /* The domain is OK for routing. Remember if retry data exists so it
6786 can be cleaned up after a successful delivery. */
6790 if (domain_retry_record || address_retry_record)
6791 setflag(addr, af_dr_retry_exists);
6792 addr->next = addr_route;
6794 DEBUG(D_deliver|D_route)
6795 debug_printf("%s: queued for routing\n", addr->address);
6799 /* The database is closed while routing is actually happening. Requests to
6800 update it are put on a chain and all processed together at the end. */
6802 if (dbm_file) dbfn_close(dbm_file);
6804 /* If queue_domains is set, we don't even want to try routing addresses in
6805 those domains. During queue runs, queue_domains is forced to be unset.
6806 Optimize by skipping this pass through the addresses if nothing is set. */
6808 if (!f.deliver_force && queue_domains)
6810 address_item *okaddr = NULL;
6813 address_item *addr = addr_route;
6814 addr_route = addr->next;
6816 deliver_domain = addr->domain; /* set $domain */
6817 if ((rc = match_isinlist(addr->domain, (const uschar **)&queue_domains, 0,
6818 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
6822 addr->basic_errno = ERRNO_LISTDEFER;
6823 addr->message = US"queue_domains lookup deferred";
6824 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6828 addr->next = okaddr;
6833 addr->basic_errno = ERRNO_QUEUE_DOMAIN;
6834 addr->message = US"domain is in queue_domains";
6835 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6839 addr_route = okaddr;
6842 /* Now route those addresses that are not deferred. */
6847 address_item *addr = addr_route;
6848 const uschar *old_domain = addr->domain;
6849 uschar *old_unique = addr->unique;
6850 addr_route = addr->next;
6853 /* Just in case some router parameter refers to it. */
6855 if (!(return_path = addr->prop.errors_address))
6856 return_path = sender_address;
6858 /* If a router defers an address, add a retry item. Whether or not to
6859 use the local part in the key is a property of the router. */
6861 if ((rc = route_address(addr, &addr_local, &addr_remote, &addr_new,
6862 &addr_succeed, v_none)) == DEFER)
6863 retry_add_item(addr,
6864 addr->router->retry_use_local_part
6865 ? string_sprintf("R:%s@%s", addr->local_part, addr->domain)
6866 : string_sprintf("R:%s", addr->domain),
6869 /* Otherwise, if there is an existing retry record in the database, add
6870 retry items to delete both forms. We must also allow for the possibility
6871 of a routing retry that includes the sender address. Since the domain might
6872 have been rewritten (expanded to fully qualified) as a result of routing,
6873 ensure that the rewritten form is also deleted. */
6875 else if (testflag(addr, af_dr_retry_exists))
6877 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
6879 retry_add_item(addr, altkey, rf_delete);
6880 retry_add_item(addr, addr->address_retry_key, rf_delete);
6881 retry_add_item(addr, addr->domain_retry_key, rf_delete);
6882 if (Ustrcmp(addr->domain, old_domain) != 0)
6883 retry_add_item(addr, string_sprintf("R:%s", old_domain), rf_delete);
6886 /* DISCARD is given for :blackhole: and "seen finish". The event has been
6887 logged, but we need to ensure the address (and maybe parents) is marked
6892 address_done(addr, tod_stamp(tod_log));
6893 continue; /* route next address */
6896 /* The address is finished with (failed or deferred). */
6900 (void)post_process_one(addr, rc, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6901 continue; /* route next address */
6904 /* The address has been routed. If the router changed the domain, it will
6905 also have changed the unique address. We have to test whether this address
6906 has already been delivered, because it's the unique address that finally
6909 if ( addr->unique != old_unique
6910 && tree_search(tree_nonrecipients, addr->unique) != 0
6913 DEBUG(D_deliver|D_route) debug_printf("%s was previously delivered: "
6914 "discarded\n", addr->address);
6915 if (addr_remote == addr) addr_remote = addr->next;
6916 else if (addr_local == addr) addr_local = addr->next;
6919 /* If the router has same_domain_copy_routing set, we are permitted to copy
6920 the routing for any other addresses with the same domain. This is an
6921 optimisation to save repeated DNS lookups for "standard" remote domain
6922 routing. The option is settable only on routers that generate host lists.
6923 We play it very safe, and do the optimization only if the address is routed
6924 to a remote transport, there are no header changes, and the domain was not
6925 modified by the router. */
6927 if ( addr_remote == addr
6928 && addr->router->same_domain_copy_routing
6929 && !addr->prop.extra_headers
6930 && !addr->prop.remove_headers
6931 && old_domain == addr->domain
6934 address_item **chain = &addr_route;
6937 address_item *addr2 = *chain;
6938 if (Ustrcmp(addr2->domain, addr->domain) != 0)
6940 chain = &(addr2->next);
6944 /* Found a suitable address; take it off the routing list and add it to
6945 the remote delivery list. */
6947 *chain = addr2->next;
6948 addr2->next = addr_remote;
6949 addr_remote = addr2;
6951 /* Copy the routing data */
6953 addr2->domain = addr->domain;
6954 addr2->router = addr->router;
6955 addr2->transport = addr->transport;
6956 addr2->host_list = addr->host_list;
6957 addr2->fallback_hosts = addr->fallback_hosts;
6958 addr2->prop.errors_address = addr->prop.errors_address;
6959 copyflag(addr2, addr, af_hide_child);
6960 copyflag(addr2, addr, af_local_host_removed);
6962 DEBUG(D_deliver|D_route)
6963 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"
6965 "Routing for %s copied from %s\n",
6966 addr2->address, addr2->address, addr->address);
6969 } /* Continue with routing the next address. */
6970 } /* Loop to process any child addresses that the routers created, and
6971 any rerouted addresses that got put back on the new chain. */
6974 /* Debugging: show the results of the routing */
6976 DEBUG(D_deliver|D_retry|D_route)
6978 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
6979 debug_printf("After routing:\n Local deliveries:\n");
6980 for (address_item * p = addr_local; p; p = p->next)
6981 debug_printf(" %s\n", p->address);
6983 debug_printf(" Remote deliveries:\n");
6984 for (address_item * p = addr_remote; p; p = p->next)
6985 debug_printf(" %s\n", p->address);
6987 debug_printf(" Failed addresses:\n");
6988 for (address_item * p = addr_failed; p; p = p->next)
6989 debug_printf(" %s\n", p->address);
6991 debug_printf(" Deferred addresses:\n");
6992 for (address_item * p = addr_defer; p; p = p->next)
6993 debug_printf(" %s\n", p->address);
6996 /* Free any resources that were cached during routing. */
7001 /* These two variables are set only during routing, after check_local_user.
7002 Ensure they are not set in transports. */
7004 local_user_gid = (gid_t)(-1);
7005 local_user_uid = (uid_t)(-1);
7007 /* Check for any duplicate addresses. This check is delayed until after
7008 routing, because the flexibility of the routing configuration means that
7009 identical addresses with different parentage may end up being redirected to
7010 different addresses. Checking for duplicates too early (as we previously used
7011 to) makes this kind of thing not work. */
7013 do_duplicate_check(&addr_local);
7014 do_duplicate_check(&addr_remote);
7016 /* When acting as an MUA wrapper, we proceed only if all addresses route to a
7017 remote transport. The check that they all end up in one transaction happens in
7018 the do_remote_deliveries() function. */
7021 && (addr_local || addr_failed || addr_defer)
7025 uschar *which, *colon, *msg;
7032 else if (addr_defer)
7035 which = US"deferred";
7043 while (addr->parent) addr = addr->parent;
7048 msg = addr->message;
7050 else colon = msg = US"";
7052 /* We don't need to log here for a forced failure as it will already
7053 have been logged. Defer will also have been logged, but as a defer, so we do
7054 need to do the failure logging. */
7056 if (addr != addr_failed)
7057 log_write(0, LOG_MAIN, "** %s routing yielded a %s delivery",
7058 addr->address, which);
7060 /* Always write an error to the caller */
7062 fprintf(stderr, "routing %s yielded a %s delivery%s%s\n", addr->address,
7065 final_yield = DELIVER_MUA_FAILED;
7066 addr_failed = addr_defer = NULL; /* So that we remove the message */
7067 goto DELIVERY_TIDYUP;
7071 /* If this is a run to continue deliveries to an external channel that is
7072 already set up, defer any local deliveries. */
7074 if (continue_transport)
7078 address_item *addr = addr_defer;
7079 while (addr->next) addr = addr->next;
7080 addr->next = addr_local;
7083 addr_defer = addr_local;
7088 /* Because address rewriting can happen in the routers, we should not really do
7089 ANY deliveries until all addresses have been routed, so that all recipients of
7090 the message get the same headers. However, this is in practice not always
7091 possible, since sometimes remote addresses give DNS timeouts for days on end.
7092 The pragmatic approach is to deliver what we can now, saving any rewritten
7093 headers so that at least the next lot of recipients benefit from the rewriting
7094 that has already been done.
7096 If any headers have been rewritten during routing, update the spool file to
7097 remember them for all subsequent deliveries. This can be delayed till later if
7098 there is only address to be delivered - if it succeeds the spool write need not
7101 if ( f.header_rewritten
7102 && ( addr_local && (addr_local->next || addr_remote)
7103 || addr_remote && addr_remote->next
7106 /* Panic-dies on error */
7107 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7108 f.header_rewritten = FALSE;
7112 /* If there are any deliveries to do and we do not already have the journal
7113 file, create it. This is used to record successful deliveries as soon as
7114 possible after each delivery is known to be complete. A file opened with
7115 O_APPEND is used so that several processes can run simultaneously.
7117 The journal is just insurance against crashes. When the spool file is
7118 ultimately updated at the end of processing, the journal is deleted. If a
7119 journal is found to exist at the start of delivery, the addresses listed
7120 therein are added to the non-recipients. */
7122 if (addr_local || addr_remote)
7126 uschar * fname = spool_fname(US"input", message_subdir, id, US"-J");
7128 if ((journal_fd = Uopen(fname,
7132 O_WRONLY|O_APPEND|O_CREAT|O_EXCL, SPOOL_MODE)) < 0)
7134 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't open journal file %s: %s",
7135 fname, strerror(errno));
7136 return DELIVER_NOT_ATTEMPTED;
7139 /* Set the close-on-exec flag, make the file owned by Exim, and ensure
7140 that the mode is correct - the group setting doesn't always seem to get
7141 set automatically. */
7143 if( exim_fchown(journal_fd, exim_uid, exim_gid, fname)
7144 || fchmod(journal_fd, SPOOL_MODE)
7146 || fcntl(journal_fd, F_SETFD, fcntl(journal_fd, F_GETFD) | FD_CLOEXEC)
7150 int ret = Uunlink(fname);
7151 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't set perms on journal file %s: %s",
7152 fname, strerror(errno));
7153 if(ret && errno != ENOENT)
7154 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7155 fname, strerror(errno));
7156 return DELIVER_NOT_ATTEMPTED;
7160 else if (journal_fd >= 0)
7168 /* Now we can get down to the business of actually doing deliveries. Local
7169 deliveries are done first, then remote ones. If ever the problems of how to
7170 handle fallback transports are figured out, this section can be put into a loop
7171 for handling fallbacks, though the uid switching will have to be revised. */
7173 /* Precompile a regex that is used to recognize a parameter in response
7174 to an LHLO command, if is isn't already compiled. This may be used on both
7175 local and remote LMTP deliveries. */
7177 if (!regex_IGNOREQUOTA)
7179 regex_must_compile(US"\\n250[\\s\\-]IGNOREQUOTA(\\s|\\n|$)", FALSE, TRUE);
7181 /* Handle local deliveries */
7185 DEBUG(D_deliver|D_transport)
7186 debug_printf(">>>>>>>>>>>>>>>> Local deliveries >>>>>>>>>>>>>>>>\n");
7187 do_local_deliveries();
7188 f.disable_logging = FALSE;
7191 /* If queue_run_local is set, we do not want to attempt any remote deliveries,
7192 so just queue them all. */
7194 if (f.queue_run_local)
7197 address_item *addr = addr_remote;
7198 addr_remote = addr->next;
7200 addr->basic_errno = ERRNO_LOCAL_ONLY;
7201 addr->message = US"remote deliveries suppressed";
7202 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_TRANSPORT, 0);
7205 /* Handle remote deliveries */
7209 DEBUG(D_deliver|D_transport)
7210 debug_printf(">>>>>>>>>>>>>>>> Remote deliveries >>>>>>>>>>>>>>>>\n");
7212 /* Precompile some regex that are used to recognize parameters in response
7213 to an EHLO command, if they aren't already compiled. */
7215 smtp_deliver_init();
7217 /* Now sort the addresses if required, and do the deliveries. The yield of
7218 do_remote_deliveries is FALSE when mua_wrapper is set and all addresses
7219 cannot be delivered in one transaction. */
7221 if (remote_sort_domains) sort_remote_deliveries();
7222 if (!do_remote_deliveries(FALSE))
7224 log_write(0, LOG_MAIN, "** mua_wrapper is set but recipients cannot all "
7225 "be delivered in one transaction");
7226 fprintf(stderr, "delivery to smarthost failed (configuration problem)\n");
7228 final_yield = DELIVER_MUA_FAILED;
7229 addr_failed = addr_defer = NULL; /* So that we remove the message */
7230 goto DELIVERY_TIDYUP;
7233 /* See if any of the addresses that failed got put on the queue for delivery
7234 to their fallback hosts. We do it this way because often the same fallback
7235 host is used for many domains, so all can be sent in a single transaction
7236 (if appropriately configured). */
7238 if (addr_fallback && !mua_wrapper)
7240 DEBUG(D_deliver) debug_printf("Delivering to fallback hosts\n");
7241 addr_remote = addr_fallback;
7242 addr_fallback = NULL;
7243 if (remote_sort_domains) sort_remote_deliveries();
7244 do_remote_deliveries(TRUE);
7246 f.disable_logging = FALSE;
7250 /* All deliveries are now complete. Ignore SIGTERM during this tidying up
7251 phase, to minimize cases of half-done things. */
7254 debug_printf(">>>>>>>>>>>>>>>> deliveries are done >>>>>>>>>>>>>>>>\n");
7255 cancel_cutthrough_connection(TRUE, US"deliveries are done");
7257 /* Root privilege is no longer needed */
7259 exim_setugid(exim_uid, exim_gid, FALSE, US"post-delivery tidying");
7261 set_process_info("tidying up after delivering %s", message_id);
7262 signal(SIGTERM, SIG_IGN);
7264 /* When we are acting as an MUA wrapper, the smtp transport will either have
7265 succeeded for all addresses, or failed them all in normal cases. However, there
7266 are some setup situations (e.g. when a named port does not exist) that cause an
7267 immediate exit with deferral of all addresses. Convert those into failures. We
7268 do not ever want to retry, nor do we want to send a bounce message. */
7274 address_item * nextaddr;
7275 for (address_item * addr = addr_defer; addr; addr = nextaddr)
7277 log_write(0, LOG_MAIN, "** %s mua_wrapper forced failure for deferred "
7278 "delivery", addr->address);
7279 nextaddr = addr->next;
7280 addr->next = addr_failed;
7286 /* Now all should either have succeeded or failed. */
7289 final_yield = DELIVER_MUA_SUCCEEDED;
7293 uschar *s = addr_failed->user_message;
7295 if (!s) s = addr_failed->message;
7297 fprintf(stderr, "Delivery failed: ");
7298 if (addr_failed->basic_errno > 0)
7300 fprintf(stderr, "%s", strerror(addr_failed->basic_errno));
7301 if (s) fprintf(stderr, ": ");
7303 if ((host = addr_failed->host_used))
7304 fprintf(stderr, "H=%s [%s]: ", host->name, host->address);
7306 fprintf(stderr, "%s", CS s);
7307 else if (addr_failed->basic_errno <= 0)
7308 fprintf(stderr, "unknown error");
7309 fprintf(stderr, "\n");
7311 final_yield = DELIVER_MUA_FAILED;
7316 /* In a normal configuration, we now update the retry database. This is done in
7317 one fell swoop at the end in order not to keep opening and closing (and
7318 locking) the database. The code for handling retries is hived off into a
7319 separate module for convenience. We pass it the addresses of the various
7320 chains, because deferred addresses can get moved onto the failed chain if the
7321 retry cutoff time has expired for all alternative destinations. Bypass the
7322 updating of the database if the -N flag is set, which is a debugging thing that
7323 prevents actual delivery. */
7325 else if (!f.dont_deliver)
7326 retry_update(&addr_defer, &addr_failed, &addr_succeed);
7328 /* Send DSN for successful messages if requested */
7329 addr_senddsn = NULL;
7331 for (address_item * a = addr_succeed; a; a = a->next)
7333 /* af_ignore_error not honored here. it's not an error */
7334 DEBUG(D_deliver) debug_printf("DSN: processing router : %s\n"
7335 "DSN: processing successful delivery address: %s\n"
7336 "DSN: Sender_address: %s\n"
7337 "DSN: orcpt: %s flags: 0x%x\n"
7338 "DSN: envid: %s ret: %d\n"
7339 "DSN: Final recipient: %s\n"
7340 "DSN: Remote SMTP server supports DSN: %d\n",
7341 a->router ? a->router->name : US"(unknown)",
7344 a->dsn_orcpt ? a->dsn_orcpt : US"NULL",
7346 dsn_envid ? dsn_envid : US"NULL", dsn_ret,
7351 /* send report if next hop not DSN aware or a router flagged "last DSN hop"
7352 and a report was requested */
7354 if ( (a->dsn_aware != dsn_support_yes || a->dsn_flags & rf_dsnlasthop)
7355 && a->dsn_flags & rf_notify_success
7358 /* copy and relink address_item and send report with all of them at once later */
7359 address_item * addr_next = addr_senddsn;
7360 addr_senddsn = store_get(sizeof(address_item), FALSE);
7362 addr_senddsn->next = addr_next;
7365 DEBUG(D_deliver) debug_printf("DSN: not sending DSN success message\n");
7373 /* create exim process to send message */
7374 pid = child_open_exim(&fd, US"DSN");
7376 DEBUG(D_deliver) debug_printf("DSN: child_open_exim returns: %d\n", pid);
7378 if (pid < 0) /* Creation of child failed */
7380 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to "
7381 "create child process to send success-dsn message: %s", getpid(),
7382 getppid(), strerror(errno));
7384 DEBUG(D_deliver) debug_printf("DSN: child_open_exim failed\n");
7386 else /* Creation of child succeeded */
7388 FILE * f = fdopen(fd, "wb");
7389 /* header only as required by RFC. only failure DSN needs to honor RET=FULL */
7391 transport_ctx tctx = {{0}};
7394 debug_printf("sending success-dsn to: %s\n", sender_address);
7396 /* build unique id for MIME boundary */
7397 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
7398 DEBUG(D_deliver) debug_printf("DSN: MIME boundary: %s\n", bound);
7400 if (errors_reply_to)
7401 fprintf(f, "Reply-To: %s\n", errors_reply_to);
7404 fprintf(f, "Auto-Submitted: auto-generated\n"
7406 "Subject: Delivery Status Notification\n",
7408 moan_write_references(f, NULL);
7409 fprintf(f, "Content-Type: multipart/report;"
7410 " report-type=delivery-status; boundary=%s\n"
7411 "MIME-Version: 1.0\n\n"
7414 "Content-type: text/plain; charset=us-ascii\n\n"
7416 "This message was created automatically by mail delivery software.\n"
7417 " ----- The following addresses had successful delivery notifications -----\n",
7420 for (address_item * a = addr_senddsn; a; a = a->next)
7421 fprintf(f, "<%s> (relayed %s)\n\n",
7423 a->dsn_flags & rf_dsnlasthop ? "via non DSN router"
7424 : a->dsn_aware == dsn_support_no ? "to non-DSN-aware mailer"
7425 : "via non \"Remote SMTP\" router"
7429 "Content-type: message/delivery-status\n\n"
7430 "Reporting-MTA: dns; %s\n",
7431 bound, smtp_active_hostname);
7434 { /* must be decoded from xtext: see RFC 3461:6.3a */
7436 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
7437 fprintf(f, "Original-Envelope-ID: %s\n", dsn_envid);
7439 fprintf(f, "X-Original-Envelope-ID: error decoding xtext formatted ENVID\n");
7443 for (address_item * a = addr_senddsn; a; a = a->next)
7447 print_dsn_addr_action(f, a, US"delivered", US"2.0.0");
7449 if ((hu = a->host_used) && hu->name)
7450 fprintf(f, "Remote-MTA: dns; %s\nDiagnostic-Code: smtp; 250 Ok\n\n",
7453 fprintf(f, "Diagnostic-Code: X-Exim; relayed via non %s router\n\n",
7454 a->dsn_flags & rf_dsnlasthop ? "DSN" : "SMTP");
7457 fprintf(f, "--%s\nContent-type: text/rfc822-headers\n\n", bound);
7460 transport_filter_argv = NULL; /* Just in case */
7461 return_path = sender_address; /* In case not previously set */
7463 /* Write the original email out */
7466 tctx.options = topt_add_return_path | topt_no_body;
7467 /*XXX hmm, FALSE(fail) retval ignored.
7468 Could error for any number of reasons, and they are not handled. */
7469 transport_write_message(&tctx, 0);
7472 fprintf(f,"\n--%s--\n", bound);
7476 rc = child_close(pid, 0); /* Waits for child to close, no timeout */
7480 /* If any addresses failed, we must send a message to somebody, unless
7481 af_ignore_error is set, in which case no action is taken. It is possible for
7482 several messages to get sent if there are addresses with different
7489 uschar *logtod = tod_stamp(tod_log);
7491 address_item *handled_addr = NULL;
7492 address_item **paddr;
7493 address_item *msgchain = NULL;
7494 address_item **pmsgchain = &msgchain;
7496 /* There are weird cases when logging is disabled in the transport. However,
7497 there may not be a transport (address failed by a router). */
7499 f.disable_logging = FALSE;
7500 if (addr_failed->transport)
7501 f.disable_logging = addr_failed->transport->disable_logging;
7504 debug_printf("processing failed address %s\n", addr_failed->address);
7506 /* There are only two ways an address in a bounce message can get here:
7508 (1) When delivery was initially deferred, but has now timed out (in the call
7509 to retry_update() above). We can detect this by testing for
7510 af_retry_timedout. If the address does not have its own errors address,
7511 we arrange to ignore the error.
7513 (2) If delivery failures for bounce messages are being ignored. We can detect
7514 this by testing for af_ignore_error. This will also be set if a bounce
7515 message has been autothawed and the ignore_bounce_errors_after time has
7516 passed. It might also be set if a router was explicitly configured to
7517 ignore errors (errors_to = "").
7519 If neither of these cases obtains, something has gone wrong. Log the
7520 incident, but then ignore the error. */
7522 if (sender_address[0] == 0 && !addr_failed->prop.errors_address)
7524 if ( !testflag(addr_failed, af_retry_timedout)
7525 && !addr_failed->prop.ignore_error)
7526 log_write(0, LOG_MAIN|LOG_PANIC, "internal error: bounce message "
7527 "failure is neither frozen nor ignored (it's been ignored)");
7529 addr_failed->prop.ignore_error = TRUE;
7532 /* If the first address on the list has af_ignore_error set, just remove
7533 it from the list, throw away any saved message file, log it, and
7534 mark the recipient done. */
7536 if ( addr_failed->prop.ignore_error
7537 || addr_failed->dsn_flags & rf_dsnflags
7538 && !(addr_failed->dsn_flags & rf_notify_failure)
7542 addr_failed = addr->next;
7543 if (addr->return_filename) Uunlink(addr->return_filename);
7545 #ifndef DISABLE_EVENT
7546 msg_event_raise(US"msg:fail:delivery", addr);
7548 log_write(0, LOG_MAIN, "%s%s%s%s: error ignored%s",
7550 !addr->parent ? US"" : US" <",
7551 !addr->parent ? US"" : addr->parent->address,
7552 !addr->parent ? US"" : US">",
7553 addr->prop.ignore_error
7554 ? US"" : US": RFC 3461 DSN, failure notify not requested");
7556 address_done(addr, logtod);
7557 child_done(addr, logtod);
7558 /* Panic-dies on error */
7559 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7562 /* Otherwise, handle the sending of a message. Find the error address for
7563 the first address, then send a message that includes all failed addresses
7564 that have the same error address. Note the bounce_recipient is a global so
7565 that it can be accessed by $bounce_recipient while creating a customized
7570 if (!(bounce_recipient = addr_failed->prop.errors_address))
7571 bounce_recipient = sender_address;
7573 /* Make a subprocess to send a message */
7575 if ((pid = child_open_exim(&fd, US"bounce-message")) < 0)
7576 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to "
7577 "create child process to send failure message: %s", getpid(),
7578 getppid(), strerror(errno));
7580 /* Creation of child succeeded */
7587 uschar *bcc, *emf_text;
7588 FILE * fp = fdopen(fd, "wb");
7590 BOOL to_sender = strcmpic(sender_address, bounce_recipient) == 0;
7591 int max = (bounce_return_size_limit/DELIVER_IN_BUFFER_SIZE + 1) *
7592 DELIVER_IN_BUFFER_SIZE;
7594 uschar *dsnlimitmsg;
7595 uschar *dsnnotifyhdr;
7599 debug_printf("sending error message to: %s\n", bounce_recipient);
7601 /* Scan the addresses for all that have the same errors address, removing
7602 them from the addr_failed chain, and putting them on msgchain. */
7604 paddr = &addr_failed;
7605 for (addr = addr_failed; addr; addr = *paddr)
7606 if (Ustrcmp(bounce_recipient, addr->prop.errors_address
7607 ? addr->prop.errors_address : sender_address) == 0)
7608 { /* The same - dechain */
7609 *paddr = addr->next;
7612 pmsgchain = &(addr->next);
7615 paddr = &addr->next; /* Not the same; skip */
7617 /* Include X-Failed-Recipients: for automatic interpretation, but do
7618 not let any one header line get too long. We do this by starting a
7619 new header every 50 recipients. Omit any addresses for which the
7620 "hide_child" flag is set. */
7622 for (addr = msgchain; addr; addr = addr->next)
7624 if (testflag(addr, af_hide_child)) continue;
7632 ? "X-Failed-Recipients: "
7634 testflag(addr, af_pfr) && addr->parent
7635 ? string_printing(addr->parent->address)
7636 : string_printing(addr->address));
7638 if (rcount > 0) fprintf(fp, "\n");
7640 /* Output the standard headers */
7642 if (errors_reply_to)
7643 fprintf(fp, "Reply-To: %s\n", errors_reply_to);
7644 fprintf(fp, "Auto-Submitted: auto-replied\n");
7645 moan_write_from(fp);
7646 fprintf(fp, "To: %s\n", bounce_recipient);
7647 moan_write_references(fp, NULL);
7649 /* generate boundary string and output MIME-Headers */
7650 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
7652 fprintf(fp, "Content-Type: multipart/report;"
7653 " report-type=delivery-status; boundary=%s\n"
7654 "MIME-Version: 1.0\n",
7657 /* Open a template file if one is provided. Log failure to open, but
7658 carry on - default texts will be used. */
7660 if (bounce_message_file)
7661 emf = expand_open(bounce_message_file,
7662 US"bounce_message_file", US"error");
7664 /* Quietly copy to configured additional addresses if required. */
7666 if ((bcc = moan_check_errorcopy(bounce_recipient)))
7667 fprintf(fp, "Bcc: %s\n", bcc);
7669 /* The texts for the message can be read from a template file; if there
7670 isn't one, or if it is too short, built-in texts are used. The first
7671 emf text is a Subject: and any other headers. */
7673 if ((emf_text = next_emf(emf, US"header")))
7674 fprintf(fp, "%s\n", emf_text);
7676 fprintf(fp, "Subject: Mail delivery failed%s\n\n",
7677 to_sender? ": returning message to sender" : "");
7679 /* output human readable part as text/plain section */
7680 fprintf(fp, "--%s\n"
7681 "Content-type: text/plain; charset=us-ascii\n\n",
7684 if ((emf_text = next_emf(emf, US"intro")))
7685 fprintf(fp, "%s", CS emf_text);
7689 /* This message has been reworded several times. It seems to be confusing to
7690 somebody, however it is worded. I have retreated to the original, simple
7692 "This message was created automatically by mail delivery software.\n");
7694 if (bounce_message_text)
7695 fprintf(fp, "%s", CS bounce_message_text);
7698 "\nA message that you sent could not be delivered to one or more of its\n"
7699 "recipients. This is a permanent error. The following address(es) failed:\n");
7702 "\nA message sent by\n\n <%s>\n\n"
7703 "could not be delivered to one or more of its recipients. The following\n"
7704 "address(es) failed:\n", sender_address);
7708 /* Process the addresses, leaving them on the msgchain if they have a
7709 file name for a return message. (There has already been a check in
7710 post_process_one() for the existence of data in the message file.) A TRUE
7711 return from print_address_information() means that the address is not
7715 for (addr = msgchain; addr; addr = *paddr)
7717 if (print_address_information(addr, fp, US" ", US"\n ", US""))
7718 print_address_error(addr, fp, US"");
7720 /* End the final line for the address */
7724 /* Leave on msgchain if there's a return file. */
7726 if (addr->return_file >= 0)
7728 paddr = &(addr->next);
7732 /* Else save so that we can tick off the recipient when the
7737 *paddr = addr->next;
7738 addr->next = handled_addr;
7739 handled_addr = addr;
7745 /* Get the next text, whether we need it or not, so as to be
7746 positioned for the one after. */
7748 emf_text = next_emf(emf, US"generated text");
7750 /* If there were any file messages passed by the local transports,
7751 include them in the message. Then put the address on the handled chain.
7752 In the case of a batch of addresses that were all sent to the same
7753 transport, the return_file field in all of them will contain the same
7754 fd, and the return_filename field in the *last* one will be set (to the
7755 name of the file). */
7759 address_item *nextaddr;
7762 fprintf(fp, "%s", CS emf_text);
7765 "The following text was generated during the delivery "
7766 "attempt%s:\n", (filecount > 1)? "s" : "");
7768 for (addr = msgchain; addr; addr = nextaddr)
7771 address_item *topaddr = addr;
7773 /* List all the addresses that relate to this file */
7776 while(addr) /* Insurance */
7778 print_address_information(addr, fp, US"------ ", US"\n ",
7780 if (addr->return_filename) break;
7785 /* Now copy the file */
7787 if (!(fm = Ufopen(addr->return_filename, "rb")))
7788 fprintf(fp, " +++ Exim error... failed to open text file: %s\n",
7792 while ((ch = fgetc(fm)) != EOF) fputc(ch, fp);
7795 Uunlink(addr->return_filename);
7797 /* Can now add to handled chain, first fishing off the next
7798 address on the msgchain. */
7800 nextaddr = addr->next;
7801 addr->next = handled_addr;
7802 handled_addr = topaddr;
7807 /* output machine readable part */
7809 if (message_smtputf8)
7810 fprintf(fp, "--%s\n"
7811 "Content-type: message/global-delivery-status\n\n"
7812 "Reporting-MTA: dns; %s\n",
7813 bound, smtp_active_hostname);
7816 fprintf(fp, "--%s\n"
7817 "Content-type: message/delivery-status\n\n"
7818 "Reporting-MTA: dns; %s\n",
7819 bound, smtp_active_hostname);
7823 /* must be decoded from xtext: see RFC 3461:6.3a */
7825 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
7826 fprintf(fp, "Original-Envelope-ID: %s\n", dsn_envid);
7828 fprintf(fp, "X-Original-Envelope-ID: error decoding xtext formatted ENVID\n");
7832 for (addr = handled_addr; addr; addr = addr->next)
7836 print_dsn_addr_action(fp, addr, US"failed", US"5.0.0");
7838 if ((hu = addr->host_used) && hu->name)
7840 fprintf(fp, "Remote-MTA: dns; %s\n", hu->name);
7841 #ifdef EXPERIMENTAL_DSN_INFO
7846 uschar * p = hu->port == 25
7847 ? US"" : string_sprintf(":%d", hu->port);
7848 fprintf(fp, "Remote-MTA: X-ip; [%s]%s\n", hu->address, p);
7850 if ((s = addr->smtp_greeting) && *s)
7851 fprintf(fp, "X-Remote-MTA-smtp-greeting: X-str; %.900s\n", s);
7852 if ((s = addr->helo_response) && *s)
7853 fprintf(fp, "X-Remote-MTA-helo-response: X-str; %.900s\n", s);
7854 if ((s = addr->message) && *s)
7855 fprintf(fp, "X-Exim-Diagnostic: X-str; %.900s\n", s);
7858 print_dsn_diagnostic_code(addr, fp);
7863 /* Now copy the message, trying to give an intelligible comment if
7864 it is too long for it all to be copied. The limit isn't strictly
7865 applied because of the buffering. There is, however, an option
7866 to suppress copying altogether. */
7868 emf_text = next_emf(emf, US"copy");
7871 we ignore the intro text from template and add
7872 the text for bounce_return_size_limit at the end.
7874 bounce_return_message is ignored
7875 in case RET= is defined we honor these values
7876 otherwise bounce_return_body is honored.
7878 bounce_return_size_limit is always honored.
7881 fprintf(fp, "--%s\n", bound);
7883 dsnlimitmsg = US"X-Exim-DSN-Information: Due to administrative limits only headers are returned";
7884 dsnnotifyhdr = NULL;
7885 topt = topt_add_return_path;
7887 /* RET=HDRS? top priority */
7888 if (dsn_ret == dsn_ret_hdrs)
7889 topt |= topt_no_body;
7892 struct stat statbuf;
7894 /* no full body return at all? */
7895 if (!bounce_return_body)
7897 topt |= topt_no_body;
7898 /* add header if we overrule RET=FULL */
7899 if (dsn_ret == dsn_ret_full)
7900 dsnnotifyhdr = dsnlimitmsg;
7902 /* line length limited... return headers only if oversize */
7903 /* size limited ... return headers only if limit reached */
7904 else if ( max_received_linelength > bounce_return_linesize_limit
7905 || ( bounce_return_size_limit > 0
7906 && fstat(deliver_datafile, &statbuf) == 0
7907 && statbuf.st_size > max
7910 topt |= topt_no_body;
7911 dsnnotifyhdr = dsnlimitmsg;
7916 if (message_smtputf8)
7917 fputs(topt & topt_no_body ? "Content-type: message/global-headers\n\n"
7918 : "Content-type: message/global\n\n",
7922 fputs(topt & topt_no_body ? "Content-type: text/rfc822-headers\n\n"
7923 : "Content-type: message/rfc822\n\n",
7927 transport_filter_argv = NULL; /* Just in case */
7928 return_path = sender_address; /* In case not previously set */
7929 { /* Dummy transport for headers add */
7930 transport_ctx tctx = {{0}};
7931 transport_instance tb = {0};
7933 tctx.u.fd = fileno(fp);
7935 tctx.options = topt;
7936 tb.add_headers = dsnnotifyhdr;
7938 /*XXX no checking for failure! buggy! */
7939 transport_write_message(&tctx, 0);
7943 /* we never add the final text. close the file */
7947 fprintf(fp, "\n--%s--\n", bound);
7949 /* Close the file, which should send an EOF to the child process
7950 that is receiving the message. Wait for it to finish. */
7953 rc = child_close(pid, 0); /* Waits for child to close, no timeout */
7955 /* If the process failed, there was some disaster in setting up the
7956 error message. Unless the message is very old, ensure that addr_defer
7957 is non-null, which will have the effect of leaving the message on the
7958 spool. The failed addresses will get tried again next time. However, we
7959 don't really want this to happen too often, so freeze the message unless
7960 there are some genuine deferred addresses to try. To do this we have
7961 to call spool_write_header() here, because with no genuine deferred
7962 addresses the normal code below doesn't get run. */
7967 if (now - received_time.tv_sec < retry_maximum_timeout && !addr_defer)
7969 addr_defer = (address_item *)(+1);
7970 f.deliver_freeze = TRUE;
7971 deliver_frozen_at = time(NULL);
7972 /* Panic-dies on error */
7973 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7976 deliver_msglog("Process failed (%d) when writing error message "
7977 "to %s%s", rc, bounce_recipient, s);
7978 log_write(0, LOG_MAIN, "Process failed (%d) when writing error message "
7979 "to %s%s", rc, bounce_recipient, s);
7982 /* The message succeeded. Ensure that the recipients that failed are
7983 now marked finished with on the spool and their parents updated. */
7987 for (addr = handled_addr; addr; addr = addr->next)
7989 address_done(addr, logtod);
7990 child_done(addr, logtod);
7992 /* Panic-dies on error */
7993 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7999 f.disable_logging = FALSE; /* In case left set */
8001 /* Come here from the mua_wrapper case if routing goes wrong */
8005 /* If there are now no deferred addresses, we are done. Preserve the
8006 message log if so configured, and we are using them. Otherwise, sling it.
8007 Then delete the message itself. */
8015 fname = spool_fname(US"msglog", message_subdir, id, US"");
8016 if (preserve_message_logs)
8019 uschar * moname = spool_fname(US"msglog.OLD", US"", id, US"");
8021 if ((rc = Urename(fname, moname)) < 0)
8023 (void)directory_make(spool_directory,
8024 spool_sname(US"msglog.OLD", US""),
8025 MSGLOG_DIRECTORY_MODE, TRUE);
8026 rc = Urename(fname, moname);
8029 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to move %s to the "
8030 "msglog.OLD directory", fname);
8033 if (Uunlink(fname) < 0)
8034 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
8035 fname, strerror(errno));
8038 /* Remove the two message files. */
8040 fname = spool_fname(US"input", message_subdir, id, US"-D");
8041 if (Uunlink(fname) < 0)
8042 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
8043 fname, strerror(errno));
8044 fname = spool_fname(US"input", message_subdir, id, US"-H");
8045 if (Uunlink(fname) < 0)
8046 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
8047 fname, strerror(errno));
8049 /* Log the end of this message, with queue time if requested. */
8051 if (LOGGING(queue_time_overall))
8052 log_write(0, LOG_MAIN, "Completed QT=%s", string_timesince(&received_time));
8054 log_write(0, LOG_MAIN, "Completed");
8056 /* Unset deliver_freeze so that we won't try to move the spool files further down */
8057 f.deliver_freeze = FALSE;
8059 #ifndef DISABLE_EVENT
8060 (void) event_raise(event_action, US"msg:complete", NULL);
8064 /* If there are deferred addresses, we are keeping this message because it is
8065 not yet completed. Lose any temporary files that were catching output from
8066 pipes for any of the deferred addresses, handle one-time aliases, and see if
8067 the message has been on the queue for so long that it is time to send a warning
8068 message to the sender, unless it is a mailer-daemon. If all deferred addresses
8069 have the same domain, we can set deliver_domain for the expansion of
8070 delay_warning_ condition - if any of them are pipes, files, or autoreplies, use
8071 the parent's domain.
8073 If all the deferred addresses have an error number that indicates "retry time
8074 not reached", skip sending the warning message, because it won't contain the
8075 reason for the delay. It will get sent at the next real delivery attempt.
8076 Exception: for retries caused by a remote peer we use the error message
8077 store in the retry DB as the reason.
8078 However, if at least one address has tried, we'd better include all of them in
8081 If we can't make a process to send the message, don't worry.
8083 For mailing list expansions we want to send the warning message to the
8084 mailing list manager. We can't do a perfect job here, as some addresses may
8085 have different errors addresses, but if we take the errors address from
8086 each deferred address it will probably be right in most cases.
8088 If addr_defer == +1, it means there was a problem sending an error message
8089 for failed addresses, and there were no "real" deferred addresses. The value
8090 was set just to keep the message on the spool, so there is nothing to do here.
8093 else if (addr_defer != (address_item *)(+1))
8095 uschar *recipients = US"";
8096 BOOL want_warning_msg = FALSE;
8098 deliver_domain = testflag(addr_defer, af_pfr)
8099 ? addr_defer->parent->domain : addr_defer->domain;
8101 for (address_item * addr = addr_defer; addr; addr = addr->next)
8103 address_item *otaddr;
8105 if (addr->basic_errno > ERRNO_WARN_BASE) want_warning_msg = TRUE;
8109 const uschar *d = testflag(addr, af_pfr)
8110 ? addr->parent->domain : addr->domain;
8112 /* The domain may be unset for an address that has never been routed
8113 because the system filter froze the message. */
8115 if (!d || Ustrcmp(d, deliver_domain) != 0)
8116 deliver_domain = NULL;
8119 if (addr->return_filename) Uunlink(addr->return_filename);
8121 /* Handle the case of one-time aliases. If any address in the ancestry
8122 of this one is flagged, ensure it is in the recipients list, suitably
8123 flagged, and that its parent is marked delivered. */
8125 for (otaddr = addr; otaddr; otaddr = otaddr->parent)
8126 if (otaddr->onetime_parent) break;
8131 int t = recipients_count;
8133 for (i = 0; i < recipients_count; i++)
8135 uschar *r = recipients_list[i].address;
8136 if (Ustrcmp(otaddr->onetime_parent, r) == 0) t = i;
8137 if (Ustrcmp(otaddr->address, r) == 0) break;
8140 /* Didn't find the address already in the list, and did find the
8141 ultimate parent's address in the list, and they really are different
8142 (i.e. not from an identity-redirect). After adding the recipient,
8143 update the errors address in the recipients list. */
8145 if ( i >= recipients_count && t < recipients_count
8146 && Ustrcmp(otaddr->address, otaddr->parent->address) != 0)
8148 DEBUG(D_deliver) debug_printf("one_time: adding %s in place of %s\n",
8149 otaddr->address, otaddr->parent->address);
8150 receive_add_recipient(otaddr->address, t);
8151 recipients_list[recipients_count-1].errors_to = otaddr->prop.errors_address;
8152 tree_add_nonrecipient(otaddr->parent->address);
8153 update_spool = TRUE;
8157 /* Except for error messages, ensure that either the errors address for
8158 this deferred address or, if there is none, the sender address, is on the
8159 list of recipients for a warning message. */
8161 if (sender_address[0])
8163 uschar * s = addr->prop.errors_address;
8164 if (!s) s = sender_address;
8165 if (Ustrstr(recipients, s) == NULL)
8166 recipients = string_sprintf("%s%s%s", recipients,
8167 recipients[0] ? "," : "", s);
8171 /* Send a warning message if the conditions are right. If the condition check
8172 fails because of a lookup defer, there is nothing we can do. The warning
8173 is not sent. Another attempt will be made at the next delivery attempt (if
8176 if ( !f.queue_2stage
8178 && ( !(addr_defer->dsn_flags & rf_dsnflags)
8179 || addr_defer->dsn_flags & rf_notify_delay
8181 && delay_warning[1] > 0
8182 && sender_address[0] != 0
8183 && ( !delay_warning_condition
8184 || expand_check_condition(delay_warning_condition,
8185 US"delay_warning", US"option")
8191 int queue_time = time(NULL) - received_time.tv_sec;
8193 queue_time = test_harness_fudged_queue_time(queue_time);
8195 /* See how many warnings we should have sent by now */
8197 for (count = 0; count < delay_warning[1]; count++)
8198 if (queue_time < delay_warning[count+2]) break;
8200 show_time = delay_warning[count+1];
8202 if (count >= delay_warning[1])
8205 int last_gap = show_time;
8206 if (count > 1) last_gap -= delay_warning[count];
8207 extra = (queue_time - delay_warning[count+1])/last_gap;
8208 show_time += last_gap * extra;
8214 debug_printf("time on queue = %s id %s addr %s\n",
8215 readconf_printtime(queue_time), message_id, addr_defer->address);
8216 debug_printf("warning counts: required %d done %d\n", count,
8220 /* We have computed the number of warnings there should have been by now.
8221 If there haven't been enough, send one, and up the count to what it should
8224 if (warning_count < count)
8228 pid_t pid = child_open_exim(&fd, US"delay-warning-message");
8234 FILE * f = fdopen(fd, "wb");
8236 transport_ctx tctx = {{0}};
8238 if (warn_message_file)
8239 wmf = expand_open(warn_message_file,
8240 US"warn_message_file", US"warning");
8242 warnmsg_recipients = recipients;
8243 warnmsg_delay = queue_time < 120*60
8244 ? string_sprintf("%d minutes", show_time/60)
8245 : string_sprintf("%d hours", show_time/3600);
8247 if (errors_reply_to)
8248 fprintf(f, "Reply-To: %s\n", errors_reply_to);
8249 fprintf(f, "Auto-Submitted: auto-replied\n");
8251 fprintf(f, "To: %s\n", recipients);
8252 moan_write_references(f, NULL);
8254 /* generated boundary string and output MIME-Headers */
8255 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
8257 fprintf(f, "Content-Type: multipart/report;"
8258 " report-type=delivery-status; boundary=%s\n"
8259 "MIME-Version: 1.0\n",
8262 if ((wmf_text = next_emf(wmf, US"header")))
8263 fprintf(f, "%s\n", wmf_text);
8265 fprintf(f, "Subject: Warning: message %s delayed %s\n\n",
8266 message_id, warnmsg_delay);
8268 /* output human readable part as text/plain section */
8270 "Content-type: text/plain; charset=us-ascii\n\n",
8273 if ((wmf_text = next_emf(wmf, US"intro")))
8274 fprintf(f, "%s", CS wmf_text);
8278 "This message was created automatically by mail delivery software.\n");
8280 if (Ustrcmp(recipients, sender_address) == 0)
8282 "A message that you sent has not yet been delivered to one or more of its\n"
8283 "recipients after more than ");
8287 "A message sent by\n\n <%s>\n\n"
8288 "has not yet been delivered to one or more of its recipients after more than \n",
8291 fprintf(f, "%s on the queue on %s.\n\n"
8292 "The message identifier is: %s\n",
8293 warnmsg_delay, primary_hostname, message_id);
8295 for (h = header_list; h; h = h->next)
8296 if (strncmpic(h->text, US"Subject:", 8) == 0)
8297 fprintf(f, "The subject of the message is: %s", h->text + 9);
8298 else if (strncmpic(h->text, US"Date:", 5) == 0)
8299 fprintf(f, "The date of the message is: %s", h->text + 6);
8302 fprintf(f, "The address%s to which the message has not yet been "
8304 !addr_defer->next ? "" : "es",
8305 !addr_defer->next ? "is": "are");
8308 /* List the addresses, with error information if allowed */
8311 for (address_item * addr = addr_defer; addr; addr = addr->next)
8313 if (print_address_information(addr, f, US" ", US"\n ", US""))
8314 print_address_error(addr, f, US"Delay reason: ");
8323 if ((wmf_text = next_emf(wmf, US"final")))
8324 fprintf(f, "%s", CS wmf_text);
8330 "No action is required on your part. Delivery attempts will continue for\n"
8331 "some time, and this warning may be repeated at intervals if the message\n"
8332 "remains undelivered. Eventually the mail delivery software will give up,\n"
8333 "and when that happens, the message will be returned to you.\n");
8336 /* output machine readable part */
8337 fprintf(f, "\n--%s\n"
8338 "Content-type: message/delivery-status\n\n"
8339 "Reporting-MTA: dns; %s\n",
8341 smtp_active_hostname);
8346 /* must be decoded from xtext: see RFC 3461:6.3a */
8348 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
8349 fprintf(f,"Original-Envelope-ID: %s\n", dsn_envid);
8351 fprintf(f,"X-Original-Envelope-ID: error decoding xtext formatted ENVID\n");
8355 for (address_item * addr = addr_defer; addr; addr = addr->next)
8359 print_dsn_addr_action(f, addr, US"delayed", US"4.0.0");
8361 if ((hu = addr->host_used) && hu->name)
8363 fprintf(f, "Remote-MTA: dns; %s\n", hu->name);
8364 print_dsn_diagnostic_code(addr, f);
8370 "Content-type: text/rfc822-headers\n\n",
8374 /* header only as required by RFC. only failure DSN needs to honor RET=FULL */
8375 tctx.u.fd = fileno(f);
8376 tctx.options = topt_add_return_path | topt_no_body;
8377 transport_filter_argv = NULL; /* Just in case */
8378 return_path = sender_address; /* In case not previously set */
8380 /* Write the original email out */
8381 /*XXX no checking for failure! buggy! */
8382 transport_write_message(&tctx, 0);
8385 fprintf(f,"\n--%s--\n", bound);
8389 /* Close and wait for child process to complete, without a timeout.
8390 If there's an error, don't update the count. */
8393 if (child_close(pid, 0) == 0)
8395 warning_count = count;
8396 update_spool = TRUE; /* Ensure spool rewritten */
8402 /* Clear deliver_domain */
8404 deliver_domain = NULL;
8406 /* If this was a first delivery attempt, unset the first time flag, and
8407 ensure that the spool gets updated. */
8409 if (f.deliver_firsttime)
8411 f.deliver_firsttime = FALSE;
8412 update_spool = TRUE;
8415 /* If delivery was frozen and freeze_tell is set, generate an appropriate
8416 message, unless the message is a local error message (to avoid loops). Then
8417 log the freezing. If the text in "frozen_info" came from a system filter,
8418 it has been escaped into printing characters so as not to mess up log lines.
8419 For the "tell" message, we turn \n back into newline. Also, insert a newline
8420 near the start instead of the ": " string. */
8422 if (f.deliver_freeze)
8424 if (freeze_tell && freeze_tell[0] != 0 && !f.local_error_message)
8426 uschar *s = string_copy(frozen_info);
8427 uschar *ss = Ustrstr(s, " by the system filter: ");
8438 if (*ss == '\\' && ss[1] == 'n')
8445 moan_tell_someone(freeze_tell, addr_defer, US"Message frozen",
8446 "Message %s has been frozen%s.\nThe sender is <%s>.\n", message_id,
8450 /* Log freezing just before we update the -H file, to minimize the chance
8451 of a race problem. */
8453 deliver_msglog("*** Frozen%s\n", frozen_info);
8454 log_write(0, LOG_MAIN, "Frozen%s", frozen_info);
8457 /* If there have been any updates to the non-recipients list, or other things
8458 that get written to the spool, we must now update the spool header file so
8459 that it has the right information for the next delivery attempt. If there
8460 was more than one address being delivered, the header_change update is done
8461 earlier, in case one succeeds and then something crashes. */
8464 debug_printf("delivery deferred: update_spool=%d header_rewritten=%d\n",
8465 update_spool, f.header_rewritten);
8467 if (update_spool || f.header_rewritten)
8468 /* Panic-dies on error */
8469 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
8472 /* Finished with the message log. If the message is complete, it will have
8473 been unlinked or renamed above. */
8475 if (message_logs) (void)fclose(message_log);
8477 /* Now we can close and remove the journal file. Its only purpose is to record
8478 successfully completed deliveries asap so that this information doesn't get
8479 lost if Exim (or the machine) crashes. Forgetting about a failed delivery is
8480 not serious, as trying it again is not harmful. The journal might not be open
8481 if all addresses were deferred at routing or directing. Nevertheless, we must
8482 remove it if it exists (may have been lying around from a crash during the
8483 previous delivery attempt). We don't remove the journal if a delivery
8484 subprocess failed to pass back delivery information; this is controlled by
8485 the remove_journal flag. When the journal is left, we also don't move the
8486 message off the main spool if frozen and the option is set. It should get moved
8487 at the next attempt, after the journal has been inspected. */
8489 if (journal_fd >= 0) (void)close(journal_fd);
8493 uschar * fname = spool_fname(US"input", message_subdir, id, US"-J");
8495 if (Uunlink(fname) < 0 && errno != ENOENT)
8496 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s", fname,
8499 /* Move the message off the spool if requested */
8501 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
8502 if (f.deliver_freeze && move_frozen_messages)
8503 (void)spool_move_message(id, message_subdir, US"", US"F");
8507 /* Closing the data file frees the lock; if the file has been unlinked it
8508 will go away. Otherwise the message becomes available for another process
8511 (void)close(deliver_datafile);
8512 deliver_datafile = -1;
8513 DEBUG(D_deliver) debug_printf("end delivery of %s\n", id);
8514 #ifdef MEASURE_TIMING
8515 report_time_since(×tamp_startup, US"delivery end"); /* testcase 0005 */
8518 /* It is unlikely that there will be any cached resources, since they are
8519 released after routing, and in the delivery subprocesses. However, it's
8520 possible for an expansion for something afterwards (for example,
8521 expand_check_condition) to do a lookup. We must therefore be sure everything is
8525 acl_where = ACL_WHERE_UNKNOWN;
8534 #ifdef EXIM_TFO_PROBE
8537 f.tcp_fastopen_ok = TRUE;
8543 deliver_get_sender_address (uschar * id)
8546 uschar * new_sender_address,
8547 * save_sender_address;
8548 BOOL save_qr = f.queue_running;
8551 /* make spool_open_datafile non-noisy on fail */
8553 f.queue_running = TRUE;
8555 /* Side effect: message_subdir is set for the (possibly split) spool directory */
8557 deliver_datafile = spool_open_datafile(id);
8558 f.queue_running = save_qr;
8559 if (deliver_datafile < 0)
8562 /* Save and restore the global sender_address. I'm not sure if we should
8563 not save/restore all the other global variables too, because
8564 spool_read_header() may change all of them. But OTOH, when this
8565 deliver_get_sender_address() gets called, the current message is done
8566 already and nobody needs the globals anymore. (HS12, 2015-08-21) */
8568 spoolname = string_sprintf("%s-H", id);
8569 save_sender_address = sender_address;
8571 rc = spool_read_header(spoolname, TRUE, TRUE);
8573 new_sender_address = sender_address;
8574 sender_address = save_sender_address;
8576 if (rc != spool_read_OK)
8579 assert(new_sender_address);
8581 (void)close(deliver_datafile);
8582 deliver_datafile = -1;
8584 return new_sender_address;
8590 delivery_re_exec(int exec_type)
8594 if (cutthrough.cctx.sock >= 0 && cutthrough.callout_hold_only)
8596 int channel_fd = cutthrough.cctx.sock;
8598 smtp_peer_options = cutthrough.peer_options;
8599 continue_sequence = 0;
8602 if (cutthrough.is_tls)
8606 smtp_peer_options |= OPTION_TLS;
8607 sending_ip_address = cutthrough.snd_ip;
8608 sending_port = cutthrough.snd_port;
8610 where = US"socketpair";
8611 if (socketpair(AF_UNIX, SOCK_STREAM, 0, pfd) != 0)
8615 testharness_pause_ms(150);
8616 if ((pid = exim_fork(US"tls-proxy-interproc")) < 0)
8619 if (pid == 0) /* child: will fork again to totally disconnect */
8621 smtp_proxy_tls(cutthrough.cctx.tls_ctx, big_buffer, big_buffer_size,
8623 /* does not return */
8627 waitpid(pid, NULL, 0);
8628 (void) close(channel_fd); /* release the client socket */
8629 channel_fd = pfd[1];
8633 transport_do_pass_socket(cutthrough.transport, cutthrough.host.name,
8634 cutthrough.host.address, message_id, channel_fd);
8638 cancel_cutthrough_connection(TRUE, US"non-continued delivery");
8639 (void) child_exec_exim(exec_type, FALSE, NULL, FALSE, 2, US"-Mc", message_id);
8641 return; /* compiler quietening; control does not reach here. */
8646 LOG_MAIN | (exec_type == CEE_EXEC_EXIT ? LOG_PANIC : LOG_PANIC_DIE),
8647 "delivery re-exec %s failed: %s", where, strerror(errno));
8649 /* Get here if exec_type == CEE_EXEC_EXIT.
8650 Note: this must be _exit(), not exit(). */
8652 _exit(EX_EXECFAILED);
8658 /* End of deliver.c */