1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* See the file NOTICE for conditions of use and distribution. */
8 /* The main code for delivering a message. */
12 #include "transports/smtp.h"
17 /* Data block for keeping track of subprocesses for parallel remote
20 typedef struct pardata {
21 address_item *addrlist; /* chain of addresses */
22 address_item *addr; /* next address data expected for */
23 pid_t pid; /* subprocess pid */
24 int fd; /* pipe fd for getting result from subprocess */
25 int transport_count; /* returned transport count value */
26 BOOL done; /* no more data needed */
27 uschar *msg; /* error message */
28 uschar *return_path; /* return_path for these addresses */
31 /* Values for the process_recipients variable */
33 enum { RECIP_ACCEPT, RECIP_IGNORE, RECIP_DEFER,
34 RECIP_FAIL, RECIP_FAIL_FILTER, RECIP_FAIL_TIMEOUT,
37 /* Mutually recursive functions for marking addresses done. */
39 static void child_done(address_item *, uschar *);
40 static void address_done(address_item *, uschar *);
42 /* Table for turning base-62 numbers into binary */
44 static uschar tab62[] =
45 {0,1,2,3,4,5,6,7,8,9,0,0,0,0,0,0, /* 0-9 */
46 0,10,11,12,13,14,15,16,17,18,19,20, /* A-K */
47 21,22,23,24,25,26,27,28,29,30,31,32, /* L-W */
48 33,34,35, 0, 0, 0, 0, 0, /* X-Z */
49 0,36,37,38,39,40,41,42,43,44,45,46, /* a-k */
50 47,48,49,50,51,52,53,54,55,56,57,58, /* l-w */
54 /*************************************************
55 * Local static variables *
56 *************************************************/
58 /* addr_duplicate is global because it needs to be seen from the Envelope-To
61 static address_item *addr_defer = NULL;
62 static address_item *addr_failed = NULL;
63 static address_item *addr_fallback = NULL;
64 static address_item *addr_local = NULL;
65 static address_item *addr_new = NULL;
66 static address_item *addr_remote = NULL;
67 static address_item *addr_route = NULL;
68 static address_item *addr_succeed = NULL;
69 static address_item *addr_dsntmp = NULL;
70 static address_item *addr_senddsn = NULL;
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 void * next = buffer;
112 void * end = buffer + 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 - 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));
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;
203 /* These may be unset for multiple addresses */
205 deliver_domain = addr->domain;
206 self_hostname = addr->self_hostname;
208 #ifdef EXPERIMENTAL_BRIGHTMAIL
209 bmi_deliver = 1; /* deliver by default */
210 bmi_alt_location = NULL;
211 bmi_base64_verdict = NULL;
212 bmi_base64_tracker_verdict = NULL;
215 /* If there's only one address we can set everything. */
219 address_item *addr_orig;
221 deliver_localpart = addr->local_part;
222 deliver_localpart_prefix = addr->prefix;
223 deliver_localpart_suffix = addr->suffix;
225 for (addr_orig = addr; addr_orig->parent; addr_orig = addr_orig->parent) ;
226 deliver_domain_orig = addr_orig->domain;
228 /* Re-instate any prefix and suffix in the original local part. In all
229 normal cases, the address will have a router associated with it, and we can
230 choose the caseful or caseless version accordingly. However, when a system
231 filter sets up a pipe, file, or autoreply delivery, no router is involved.
232 In this case, though, there won't be any prefix or suffix to worry about. */
234 deliver_localpart_orig = !addr_orig->router
235 ? addr_orig->local_part
236 : addr_orig->router->caseful_local_part
237 ? addr_orig->cc_local_part
238 : addr_orig->lc_local_part;
240 /* If there's a parent, make its domain and local part available, and if
241 delivering to a pipe or file, or sending an autoreply, get the local
242 part from the parent. For pipes and files, put the pipe or file string
243 into address_pipe and address_file. */
247 deliver_domain_parent = addr->parent->domain;
248 deliver_localpart_parent = !addr->parent->router
249 ? addr->parent->local_part
250 : addr->parent->router->caseful_local_part
251 ? addr->parent->cc_local_part
252 : addr->parent->lc_local_part;
254 /* File deliveries have their own flag because they need to be picked out
255 as special more often. */
257 if (testflag(addr, af_pfr))
259 if (testflag(addr, af_file)) address_file = addr->local_part;
260 else if (deliver_localpart[0] == '|') address_pipe = addr->local_part;
261 deliver_localpart = addr->parent->local_part;
262 deliver_localpart_prefix = addr->parent->prefix;
263 deliver_localpart_suffix = addr->parent->suffix;
267 #ifdef EXPERIMENTAL_BRIGHTMAIL
268 /* Set expansion variables related to Brightmail AntiSpam */
269 bmi_base64_verdict = bmi_get_base64_verdict(deliver_localpart_orig, deliver_domain_orig);
270 bmi_base64_tracker_verdict = bmi_get_base64_tracker_verdict(bmi_base64_verdict);
271 /* get message delivery status (0 - don't deliver | 1 - deliver) */
272 bmi_deliver = bmi_get_delivery_status(bmi_base64_verdict);
273 /* if message is to be delivered, get eventual alternate location */
274 if (bmi_deliver == 1)
275 bmi_alt_location = bmi_get_alt_location(bmi_base64_verdict);
280 /* For multiple addresses, don't set local part, and leave the domain and
281 self_hostname set only if it is the same for all of them. It is possible to
282 have multiple pipe and file addresses, but only when all addresses have routed
283 to the same pipe or file. */
288 if (testflag(addr, af_pfr))
290 if (testflag(addr, af_file)) address_file = addr->local_part;
291 else if (addr->local_part[0] == '|') address_pipe = addr->local_part;
293 for (addr2 = addr->next; addr2; addr2 = addr2->next)
295 if (deliver_domain && Ustrcmp(deliver_domain, addr2->domain) != 0)
296 deliver_domain = NULL;
298 && ( !addr2->self_hostname
299 || Ustrcmp(self_hostname, addr2->self_hostname) != 0
301 self_hostname = NULL;
302 if (!deliver_domain && !self_hostname) break;
310 /*************************************************
311 * Open a msglog file *
312 *************************************************/
314 /* This function is used both for normal message logs, and for files in the
315 msglog directory that are used to catch output from pipes. Try to create the
316 directory if it does not exist. From release 4.21, normal message logs should
317 be created when the message is received.
319 Called from deliver_message(), can be operating as root.
322 filename the file name
323 mode the mode required
324 error used for saying what failed
326 Returns: a file descriptor, or -1 (with errno set)
330 open_msglog_file(uschar *filename, int mode, uschar **error)
334 for (i = 2; i > 0; i--)
343 O_WRONLY|O_APPEND|O_CREAT, mode);
346 /* Set the close-on-exec flag and change the owner to the exim uid/gid (this
347 function is called as root). Double check the mode, because the group setting
348 doesn't always get set automatically. */
351 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
353 if (fchown(fd, exim_uid, exim_gid) < 0)
358 if (fchmod(fd, mode) < 0)
368 (void)directory_make(spool_directory,
369 spool_sname(US"msglog", message_subdir),
370 MSGLOG_DIRECTORY_MODE, TRUE);
380 /*************************************************
381 * Write to msglog if required *
382 *************************************************/
384 /* Write to the message log, if configured. This function may also be called
388 format a string format
394 deliver_msglog(const char *format, ...)
397 if (!message_logs) return;
398 va_start(ap, format);
399 vfprintf(message_log, format, ap);
407 /*************************************************
408 * Replicate status for batch *
409 *************************************************/
411 /* When a transport handles a batch of addresses, it may treat them
412 individually, or it may just put the status in the first one, and return FALSE,
413 requesting that the status be copied to all the others externally. This is the
414 replication function. As well as the status, it copies the transport pointer,
415 which may have changed if appendfile passed the addresses on to a different
418 Argument: pointer to the first address in a chain
423 replicate_status(address_item *addr)
426 for (addr2 = addr->next; addr2; addr2 = addr2->next)
428 addr2->transport = addr->transport;
429 addr2->transport_return = addr->transport_return;
430 addr2->basic_errno = addr->basic_errno;
431 addr2->more_errno = addr->more_errno;
432 addr2->delivery_usec = addr->delivery_usec;
433 addr2->special_action = addr->special_action;
434 addr2->message = addr->message;
435 addr2->user_message = addr->user_message;
441 /*************************************************
442 * Compare lists of hosts *
443 *************************************************/
445 /* This function is given two pointers to chains of host items, and it yields
446 TRUE if the lists refer to the same hosts in the same order, except that
448 (1) Multiple hosts with the same non-negative MX values are permitted to appear
449 in different orders. Round-robinning nameservers can cause this to happen.
451 (2) Multiple hosts with the same negative MX values less than MX_NONE are also
452 permitted to appear in different orders. This is caused by randomizing
455 This enables Exim to use a single SMTP transaction for sending to two entirely
456 different domains that happen to end up pointing at the same hosts.
459 one points to the first host list
460 two points to the second host list
462 Returns: TRUE if the lists refer to the same host set
466 same_hosts(host_item *one, host_item *two)
470 if (Ustrcmp(one->name, two->name) != 0)
473 host_item *end_one = one;
474 host_item *end_two = two;
476 /* Batch up only if there was no MX and the list was not randomized */
478 if (mx == MX_NONE) return FALSE;
480 /* Find the ends of the shortest sequence of identical MX values */
482 while ( end_one->next && end_one->next->mx == mx
483 && end_two->next && end_two->next->mx == mx)
485 end_one = end_one->next;
486 end_two = end_two->next;
489 /* If there aren't any duplicates, there's no match. */
491 if (end_one == one) return FALSE;
493 /* For each host in the 'one' sequence, check that it appears in the 'two'
494 sequence, returning FALSE if not. */
499 for (hi = two; hi != end_two->next; hi = hi->next)
500 if (Ustrcmp(one->name, hi->name) == 0) break;
501 if (hi == end_two->next) return FALSE;
502 if (one == end_one) break;
506 /* All the hosts in the 'one' sequence were found in the 'two' sequence.
507 Ensure both are pointing at the last host, and carry on as for equality. */
512 /* if the names matched but ports do not, mismatch */
513 else if (one->port != two->port)
522 /* True if both are NULL */
529 /*************************************************
530 * Compare header lines *
531 *************************************************/
533 /* This function is given two pointers to chains of header items, and it yields
534 TRUE if they are the same header texts in the same order.
537 one points to the first header list
538 two points to the second header list
540 Returns: TRUE if the lists refer to the same header set
544 same_headers(header_line *one, header_line *two)
546 for (;; one = one->next, two = two->next)
548 if (one == two) return TRUE; /* Includes the case where both NULL */
549 if (!one || !two) return FALSE;
550 if (Ustrcmp(one->text, two->text) != 0) return FALSE;
556 /*************************************************
557 * Compare string settings *
558 *************************************************/
560 /* This function is given two pointers to strings, and it returns
561 TRUE if they are the same pointer, or if the two strings are the same.
564 one points to the first string
565 two points to the second string
567 Returns: TRUE or FALSE
571 same_strings(uschar *one, uschar *two)
573 if (one == two) return TRUE; /* Includes the case where both NULL */
574 if (!one || !two) return FALSE;
575 return (Ustrcmp(one, two) == 0);
580 /*************************************************
581 * Compare uid/gid for addresses *
582 *************************************************/
584 /* This function is given a transport and two addresses. It yields TRUE if the
585 uid/gid/initgroups settings for the two addresses are going to be the same when
590 addr1 the first address
591 addr2 the second address
593 Returns: TRUE or FALSE
597 same_ugid(transport_instance *tp, address_item *addr1, address_item *addr2)
599 if ( !tp->uid_set && !tp->expand_uid
600 && !tp->deliver_as_creator
601 && ( testflag(addr1, af_uid_set) != testflag(addr2, af_gid_set)
602 || ( testflag(addr1, af_uid_set)
603 && ( addr1->uid != addr2->uid
604 || testflag(addr1, af_initgroups) != testflag(addr2, af_initgroups)
608 if ( !tp->gid_set && !tp->expand_gid
609 && ( testflag(addr1, af_gid_set) != testflag(addr2, af_gid_set)
610 || ( testflag(addr1, af_gid_set)
611 && addr1->gid != addr2->gid
621 /*************************************************
622 * Record that an address is complete *
623 *************************************************/
625 /* This function records that an address is complete. This is straightforward
626 for most addresses, where the unique address is just the full address with the
627 domain lower cased. For homonyms (addresses that are the same as one of their
628 ancestors) their are complications. Their unique addresses have \x\ prepended
629 (where x = 0, 1, 2...), so that de-duplication works correctly for siblings and
632 Exim used to record the unique addresses of homonyms as "complete". This,
633 however, fails when the pattern of redirection varies over time (e.g. if taking
634 unseen copies at only some times of day) because the prepended numbers may vary
635 from one delivery run to the next. This problem is solved by never recording
636 prepended unique addresses as complete. Instead, when a homonymic address has
637 actually been delivered via a transport, we record its basic unique address
638 followed by the name of the transport. This is checked in subsequent delivery
639 runs whenever an address is routed to a transport.
641 If the completed address is a top-level one (has no parent, which means it
642 cannot be homonymic) we also add the original address to the non-recipients
643 tree, so that it gets recorded in the spool file and therefore appears as
644 "done" in any spool listings. The original address may differ from the unique
645 address in the case of the domain.
647 Finally, this function scans the list of duplicates, marks as done any that
648 match this address, and calls child_done() for their ancestors.
651 addr address item that has been completed
652 now current time as a string
658 address_done(address_item *addr, uschar *now)
662 update_spool = TRUE; /* Ensure spool gets updated */
664 /* Top-level address */
668 tree_add_nonrecipient(addr->unique);
669 tree_add_nonrecipient(addr->address);
672 /* Homonymous child address */
674 else if (testflag(addr, af_homonym))
677 tree_add_nonrecipient(
678 string_sprintf("%s/%s", addr->unique + 3, addr->transport->name));
681 /* Non-homonymous child address */
683 else tree_add_nonrecipient(addr->unique);
685 /* Check the list of duplicate addresses and ensure they are now marked
688 for (dup = addr_duplicate; dup; dup = dup->next)
689 if (Ustrcmp(addr->unique, dup->unique) == 0)
691 tree_add_nonrecipient(dup->unique);
692 child_done(dup, now);
699 /*************************************************
700 * Decrease counts in parents and mark done *
701 *************************************************/
703 /* This function is called when an address is complete. If there is a parent
704 address, its count of children is decremented. If there are still other
705 children outstanding, the function exits. Otherwise, if the count has become
706 zero, address_done() is called to mark the parent and its duplicates complete.
707 Then loop for any earlier ancestors.
710 addr points to the completed address item
711 now the current time as a string, for writing to the message log
717 child_done(address_item *addr, uschar *now)
723 if (--addr->child_count > 0) return; /* Incomplete parent */
724 address_done(addr, now);
726 /* Log the completion of all descendents only when there is no ancestor with
727 the same original address. */
729 for (aa = addr->parent; aa; aa = aa->parent)
730 if (Ustrcmp(aa->address, addr->address) == 0) break;
733 deliver_msglog("%s %s: children all complete\n", now, addr->address);
734 DEBUG(D_deliver) debug_printf("%s: children all complete\n", addr->address);
740 /*************************************************
741 * Delivery logging support functions *
742 *************************************************/
744 /* The LOGGING() checks in d_log_interface() are complicated for backwards
745 compatibility. When outgoing interface logging was originally added, it was
746 conditional on just incoming_interface (which is off by default). The
747 outgoing_interface option is on by default to preserve this behaviour, but
748 you can enable incoming_interface and disable outgoing_interface to get I=
749 fields on incoming lines only.
753 addr The address to be logged
755 Returns: New value for s
759 d_log_interface(gstring * g)
761 if (LOGGING(incoming_interface) && LOGGING(outgoing_interface)
762 && sending_ip_address)
764 g = string_append(g, 2, US" I=[", sending_ip_address);
765 g = LOGGING(outgoing_port)
766 ? string_append(g, 2, US"]:", string_sprintf("%d", sending_port))
767 : string_catn(g, US"]", 1);
775 d_hostlog(gstring * g, address_item * addr)
777 host_item * h = addr->host_used;
779 g = string_append(g, 2, US" H=", h->name);
781 if (LOGGING(dnssec) && h->dnssec == DS_YES)
782 g = string_catn(g, US" DS", 3);
784 g = string_append(g, 3, US" [", h->address, US"]");
786 if (LOGGING(outgoing_port))
787 g = string_append(g, 2, US":", string_sprintf("%d", h->port));
790 if (LOGGING(proxy) && proxy_local_address)
792 g = string_append(g, 3, US" PRX=[", proxy_local_address, US"]");
793 if (LOGGING(outgoing_port))
794 g = string_append(g, 2, US":", string_sprintf("%d", proxy_local_port));
798 g = d_log_interface(g);
800 if (testflag(addr, af_tcp_fastopen))
801 g = string_catn(g, US" TFO", 4);
812 d_tlslog(gstring * s, address_item * addr)
814 if (LOGGING(tls_cipher) && addr->cipher)
815 s = string_append(s, 2, US" X=", addr->cipher);
816 if (LOGGING(tls_certificate_verified) && addr->cipher)
817 s = string_append(s, 2, US" CV=",
818 testflag(addr, af_cert_verified)
821 testflag(addr, af_dane_verified)
827 if (LOGGING(tls_peerdn) && addr->peerdn)
828 s = string_append(s, 3, US" DN=\"", string_printing(addr->peerdn), US"\"");
836 #ifndef DISABLE_EVENT
838 event_raise(uschar * action, const uschar * event, uschar * ev_data)
844 debug_printf("Event(%s): event_action=|%s| delivery_IP=%s\n",
846 action, deliver_host_address);
849 event_data = ev_data;
851 if (!(s = expand_string(action)) && *expand_string_message)
852 log_write(0, LOG_MAIN|LOG_PANIC,
853 "failed to expand event_action %s in %s: %s\n",
854 event, transport_name ? transport_name : US"main", expand_string_message);
856 event_name = event_data = NULL;
858 /* If the expansion returns anything but an empty string, flag for
859 the caller to modify his normal processing
864 debug_printf("Event(%s): event_action returned \"%s\"\n", event, s);
872 msg_event_raise(const uschar * event, const address_item * addr)
874 const uschar * save_domain = deliver_domain;
875 uschar * save_local = deliver_localpart;
876 const uschar * save_host = deliver_host;
877 const uschar * save_address = deliver_host_address;
878 const int save_port = deliver_host_port;
880 if (!addr->transport)
883 router_name = addr->router ? addr->router->name : NULL;
884 transport_name = addr->transport->name;
885 deliver_domain = addr->domain;
886 deliver_localpart = addr->local_part;
887 deliver_host = addr->host_used ? addr->host_used->name : NULL;
889 (void) event_raise(addr->transport->event_action, event,
891 || Ustrcmp(addr->transport->driver_name, "smtp") == 0
892 || Ustrcmp(addr->transport->driver_name, "lmtp") == 0
893 || Ustrcmp(addr->transport->driver_name, "autoreply") == 0
894 ? addr->message : NULL);
896 deliver_host_port = save_port;
897 deliver_host_address = save_address;
898 deliver_host = save_host;
899 deliver_localpart = save_local;
900 deliver_domain = save_domain;
901 router_name = transport_name = NULL;
903 #endif /*DISABLE_EVENT*/
907 /******************************************************************************/
910 /*************************************************
911 * Generate local prt for logging *
912 *************************************************/
914 /* This function is a subroutine for use in string_log_address() below.
917 addr the address being logged
918 yield the current dynamic buffer pointer
920 Returns: the new value of the buffer pointer
924 string_get_localpart(address_item * addr, gstring * yield)
929 if (testflag(addr, af_include_affixes) && s)
932 if (testflag(addr, af_utf8_downcvt))
933 s = string_localpart_utf8_to_alabel(s, NULL);
935 yield = string_cat(yield, s);
938 s = addr->local_part;
940 if (testflag(addr, af_utf8_downcvt))
941 s = string_localpart_utf8_to_alabel(s, NULL);
943 yield = string_cat(yield, s);
946 if (testflag(addr, af_include_affixes) && s)
949 if (testflag(addr, af_utf8_downcvt))
950 s = string_localpart_utf8_to_alabel(s, NULL);
952 yield = string_cat(yield, s);
959 /*************************************************
960 * Generate log address list *
961 *************************************************/
963 /* This function generates a list consisting of an address and its parents, for
964 use in logging lines. For saved onetime aliased addresses, the onetime parent
965 field is used. If the address was delivered by a transport with rcpt_include_
966 affixes set, the af_include_affixes bit will be set in the address. In that
967 case, we include the affixes here too.
970 g points to growing-string struct
971 addr bottom (ultimate) address
972 all_parents if TRUE, include all parents
973 success TRUE for successful delivery
975 Returns: a growable string in dynamic store
979 string_log_address(gstring * g,
980 address_item *addr, BOOL all_parents, BOOL success)
982 BOOL add_topaddr = TRUE;
983 address_item *topaddr;
985 /* Find the ultimate parent */
987 for (topaddr = addr; topaddr->parent; topaddr = topaddr->parent) ;
989 /* We start with just the local part for pipe, file, and reply deliveries, and
990 for successful local deliveries from routers that have the log_as_local flag
991 set. File deliveries from filters can be specified as non-absolute paths in
992 cases where the transport is going to complete the path. If there is an error
993 before this happens (expansion failure) the local part will not be updated, and
994 so won't necessarily look like a path. Add extra text for this case. */
996 if ( testflag(addr, af_pfr)
998 && addr->router && addr->router->log_as_local
999 && addr->transport && addr->transport->info->local
1002 if (testflag(addr, af_file) && addr->local_part[0] != '/')
1003 g = string_catn(g, CUS"save ", 5);
1004 g = string_get_localpart(addr, g);
1007 /* Other deliveries start with the full address. It we have split it into local
1008 part and domain, use those fields. Some early failures can happen before the
1009 splitting is done; in those cases use the original field. */
1013 uschar * cmp = g->s + g->ptr;
1015 if (addr->local_part)
1018 g = string_get_localpart(addr, g);
1019 g = string_catn(g, US"@", 1);
1022 if (testflag(addr, af_utf8_downcvt))
1023 s = string_localpart_utf8_to_alabel(s, NULL);
1025 g = string_cat(g, s);
1028 g = string_cat(g, addr->address);
1030 /* If the address we are going to print is the same as the top address,
1031 and all parents are not being included, don't add on the top address. First
1032 of all, do a caseless comparison; if this succeeds, do a caseful comparison
1033 on the local parts. */
1035 string_from_gstring(g); /* ensure nul-terminated */
1036 if ( strcmpic(cmp, topaddr->address) == 0
1037 && Ustrncmp(cmp, topaddr->address, Ustrchr(cmp, '@') - cmp) == 0
1038 && !addr->onetime_parent
1039 && (!all_parents || !addr->parent || addr->parent == topaddr)
1041 add_topaddr = FALSE;
1044 /* If all parents are requested, or this is a local pipe/file/reply, and
1045 there is at least one intermediate parent, show it in brackets, and continue
1046 with all of them if all are wanted. */
1048 if ( (all_parents || testflag(addr, af_pfr))
1050 && addr->parent != topaddr)
1053 address_item *addr2;
1054 for (addr2 = addr->parent; addr2 != topaddr; addr2 = addr2->parent)
1056 g = string_catn(g, s, 2);
1057 g = string_cat (g, addr2->address);
1058 if (!all_parents) break;
1061 g = string_catn(g, US")", 1);
1064 /* Add the top address if it is required */
1067 g = string_append(g, 3,
1069 addr->onetime_parent ? addr->onetime_parent : topaddr->address,
1078 timesince(struct timeval * diff, struct timeval * then)
1080 gettimeofday(diff, NULL);
1081 diff->tv_sec -= then->tv_sec;
1082 if ((diff->tv_usec -= then->tv_usec) < 0)
1085 diff->tv_usec += 1000*1000;
1092 string_timediff(struct timeval * diff)
1094 static uschar buf[sizeof("0.000s")];
1096 if (diff->tv_sec >= 5 || !LOGGING(millisec))
1097 return readconf_printtime((int)diff->tv_sec);
1099 sprintf(CS buf, "%u.%03us", (uint)diff->tv_sec, (uint)diff->tv_usec/1000);
1105 string_timesince(struct timeval * then)
1107 struct timeval diff;
1109 timesince(&diff, then);
1110 return string_timediff(&diff);
1113 /******************************************************************************/
1117 /* If msg is NULL this is a delivery log and logchar is used. Otherwise
1118 this is a nonstandard call; no two-character delivery flag is written
1119 but sender-host and sender are prefixed and "msg" is inserted in the log line.
1122 flags passed to log_write()
1125 delivery_log(int flags, address_item * addr, int logchar, uschar * msg)
1127 gstring * g; /* Used for a temporary, expanding buffer, for building log lines */
1128 void * reset_point; /* released afterwards. */
1130 /* Log the delivery on the main log. We use an extensible string to build up
1131 the log line, and reset the store afterwards. Remote deliveries should always
1132 have a pointer to the host item that succeeded; local deliveries can have a
1133 pointer to a single host item in their host list, for use by the transport. */
1135 #ifndef DISABLE_EVENT
1136 /* presume no successful remote delivery */
1137 lookup_dnssec_authenticated = NULL;
1140 g = reset_point = string_get(256);
1143 g = string_append(g, 2, host_and_ident(TRUE), US" ");
1146 g->s[0] = logchar; g->ptr = 1;
1147 g = string_catn(g, US"> ", 2);
1149 g = string_log_address(g, addr, LOGGING(all_parents), TRUE);
1151 if (LOGGING(sender_on_delivery) || msg)
1152 g = string_append(g, 3, US" F=<",
1154 testflag(addr, af_utf8_downcvt)
1155 ? string_address_utf8_to_alabel(sender_address, NULL)
1162 g = string_append(g, 2, US" Q=", queue_name);
1164 #ifdef EXPERIMENTAL_SRS
1165 if(addr->prop.srs_sender)
1166 g = string_append(g, 3, US" SRS=<", addr->prop.srs_sender, US">");
1169 /* You might think that the return path must always be set for a successful
1170 delivery; indeed, I did for some time, until this statement crashed. The case
1171 when it is not set is for a delivery to /dev/null which is optimised by not
1172 being run at all. */
1174 if (used_return_path && LOGGING(return_path_on_delivery))
1175 g = string_append(g, 3, US" P=<", used_return_path, US">");
1178 g = string_append(g, 2, US" ", msg);
1180 /* For a delivery from a system filter, there may not be a router */
1182 g = string_append(g, 2, US" R=", addr->router->name);
1184 g = string_append(g, 2, US" T=", addr->transport->name);
1186 if (LOGGING(delivery_size))
1187 g = string_append(g, 2, US" S=",
1188 string_sprintf("%d", transport_count));
1190 /* Local delivery */
1192 if (addr->transport->info->local)
1194 if (addr->host_list)
1195 g = string_append(g, 2, US" H=", addr->host_list->name);
1196 g = d_log_interface(g);
1197 if (addr->shadow_message)
1198 g = string_cat(g, addr->shadow_message);
1201 /* Remote delivery */
1205 if (addr->host_used)
1207 g = d_hostlog(g, addr);
1208 if (continue_sequence > 1)
1209 g = string_catn(g, US"*", 1);
1211 #ifndef DISABLE_EVENT
1212 deliver_host_address = addr->host_used->address;
1213 deliver_host_port = addr->host_used->port;
1214 deliver_host = addr->host_used->name;
1216 /* DNS lookup status */
1217 lookup_dnssec_authenticated = addr->host_used->dnssec==DS_YES ? US"yes"
1218 : addr->host_used->dnssec==DS_NO ? US"no"
1224 g = d_tlslog(g, addr);
1227 if (addr->authenticator)
1229 g = string_append(g, 2, US" A=", addr->authenticator);
1232 g = string_append(g, 2, US":", addr->auth_id);
1233 if (LOGGING(smtp_mailauth) && addr->auth_sndr)
1234 g = string_append(g, 2, US":", addr->auth_sndr);
1238 if (LOGGING(pipelining) && testflag(addr, af_pipelining))
1239 g = string_catn(g, US" L", 2);
1241 #ifndef DISABLE_PRDR
1242 if (testflag(addr, af_prdr_used))
1243 g = string_catn(g, US" PRDR", 5);
1246 if (testflag(addr, af_chunking_used))
1247 g = string_catn(g, US" K", 2);
1250 /* confirmation message (SMTP (host_used) and LMTP (driver_name)) */
1252 if ( LOGGING(smtp_confirmation)
1254 && (addr->host_used || Ustrcmp(addr->transport->driver_name, "lmtp") == 0)
1258 unsigned lim = big_buffer_size < 1024 ? big_buffer_size : 1024;
1259 uschar *p = big_buffer;
1260 uschar *ss = addr->message;
1262 for (i = 0; i < lim && ss[i] != 0; i++) /* limit logged amount */
1264 if (ss[i] == '\"' || ss[i] == '\\') *p++ = '\\'; /* quote \ and " */
1269 g = string_append(g, 2, US" C=", big_buffer);
1272 /* Time on queue and actual time taken to deliver */
1274 if (LOGGING(queue_time))
1275 g = string_append(g, 2, US" QT=",
1276 string_timesince(&received_time));
1278 if (LOGGING(deliver_time))
1280 struct timeval diff = {.tv_sec = addr->more_errno, .tv_usec = addr->delivery_usec};
1281 g = string_append(g, 2, US" DT=", string_timediff(&diff));
1284 /* string_cat() always leaves room for the terminator. Release the
1285 store we used to build the line after writing it. */
1287 log_write(0, flags, "%s", string_from_gstring(g));
1289 #ifndef DISABLE_EVENT
1290 if (!msg) msg_event_raise(US"msg:delivery", addr);
1293 store_reset(reset_point);
1300 deferral_log(address_item * addr, uschar * now,
1301 int logflags, uschar * driver_name, uschar * driver_kind)
1306 /* Build up the line that is used for both the message log and the main
1309 g = reset_point = string_get(256);
1311 /* Create the address string for logging. Must not do this earlier, because
1312 an OK result may be changed to FAIL when a pipe returns text. */
1314 g = string_log_address(g, addr, LOGGING(all_parents), FALSE);
1317 g = string_append(g, 2, US" Q=", queue_name);
1319 /* Either driver_name contains something and driver_kind contains
1320 " router" or " transport" (note the leading space), or driver_name is
1321 a null string and driver_kind contains "routing" without the leading
1322 space, if all routing has been deferred. When a domain has been held,
1323 so nothing has been done at all, both variables contain null strings. */
1327 if (driver_kind[1] == 't' && addr->router)
1328 g = string_append(g, 2, US" R=", addr->router->name);
1329 g = string_cat(g, string_sprintf(" %c=%s", toupper(driver_kind[1]), driver_name));
1331 else if (driver_kind)
1332 g = string_append(g, 2, US" ", driver_kind);
1334 /*XXX need an s+s+p sprintf */
1335 g = string_cat(g, string_sprintf(" defer (%d)", addr->basic_errno));
1337 if (addr->basic_errno > 0)
1338 g = string_append(g, 2, US": ",
1339 US strerror(addr->basic_errno));
1341 if (addr->host_used)
1343 g = string_append(g, 5,
1344 US" H=", addr->host_used->name,
1345 US" [", addr->host_used->address, US"]");
1346 if (LOGGING(outgoing_port))
1348 int port = addr->host_used->port;
1349 g = string_append(g, 2,
1350 US":", port == PORT_NONE ? US"25" : string_sprintf("%d", port));
1355 g = string_append(g, 2, US": ", addr->message);
1357 (void) string_from_gstring(g);
1359 /* Log the deferment in the message log, but don't clutter it
1360 up with retry-time defers after the first delivery attempt. */
1362 if (f.deliver_firsttime || addr->basic_errno > ERRNO_RETRY_BASE)
1363 deliver_msglog("%s %s\n", now, g->s);
1365 /* Write the main log and reset the store.
1366 For errors of the type "retry time not reached" (also remotes skipped
1367 on queue run), logging is controlled by L_retry_defer. Note that this kind
1368 of error number is negative, and all the retry ones are less than any
1372 log_write(addr->basic_errno <= ERRNO_RETRY_BASE ? L_retry_defer : 0, logflags,
1375 store_reset(reset_point);
1382 failure_log(address_item * addr, uschar * driver_kind, uschar * now)
1385 gstring * g = reset_point = string_get(256);
1387 #ifndef DISABLE_EVENT
1388 /* Message failures for which we will send a DSN get their event raised
1389 later so avoid doing it here. */
1391 if ( !addr->prop.ignore_error
1392 && !(addr->dsn_flags & (rf_dsnflags & ~rf_notify_failure))
1394 msg_event_raise(US"msg:fail:delivery", addr);
1397 /* Build up the log line for the message and main logs */
1399 /* Create the address string for logging. Must not do this earlier, because
1400 an OK result may be changed to FAIL when a pipe returns text. */
1402 g = string_log_address(g, addr, LOGGING(all_parents), FALSE);
1404 if (LOGGING(sender_on_delivery))
1405 g = string_append(g, 3, US" F=<", sender_address, US">");
1408 g = string_append(g, 2, US" Q=", queue_name);
1410 /* Return path may not be set if no delivery actually happened */
1412 if (used_return_path && LOGGING(return_path_on_delivery))
1413 g = string_append(g, 3, US" P=<", used_return_path, US">");
1416 g = string_append(g, 2, US" R=", addr->router->name);
1417 if (addr->transport)
1418 g = string_append(g, 2, US" T=", addr->transport->name);
1420 if (addr->host_used)
1421 g = d_hostlog(g, addr);
1424 g = d_tlslog(g, addr);
1427 if (addr->basic_errno > 0)
1428 g = string_append(g, 2, US": ", US strerror(addr->basic_errno));
1431 g = string_append(g, 2, US": ", addr->message);
1433 (void) string_from_gstring(g);
1435 /* Do the logging. For the message log, "routing failed" for those cases,
1436 just to make it clearer. */
1439 deliver_msglog("%s %s failed for %s\n", now, driver_kind, g->s);
1441 deliver_msglog("%s %s\n", now, g->s);
1443 log_write(0, LOG_MAIN, "** %s", g->s);
1445 store_reset(reset_point);
1451 /*************************************************
1452 * Actions at the end of handling an address *
1453 *************************************************/
1455 /* This is a function for processing a single address when all that can be done
1456 with it has been done.
1459 addr points to the address block
1460 result the result of the delivery attempt
1461 logflags flags for log_write() (LOG_MAIN and/or LOG_PANIC)
1462 driver_type indicates which type of driver (transport, or router) was last
1463 to process the address
1464 logchar '=' or '-' for use when logging deliveries with => or ->
1470 post_process_one(address_item *addr, int result, int logflags, int driver_type,
1473 uschar *now = tod_stamp(tod_log);
1474 uschar *driver_kind = NULL;
1475 uschar *driver_name = NULL;
1477 DEBUG(D_deliver) debug_printf("post-process %s (%d)\n", addr->address, result);
1479 /* Set up driver kind and name for logging. Disable logging if the router or
1480 transport has disabled it. */
1482 if (driver_type == EXIM_DTYPE_TRANSPORT)
1484 if (addr->transport)
1486 driver_name = addr->transport->name;
1487 driver_kind = US" transport";
1488 f.disable_logging = addr->transport->disable_logging;
1490 else driver_kind = US"transporting";
1492 else if (driver_type == EXIM_DTYPE_ROUTER)
1496 driver_name = addr->router->name;
1497 driver_kind = US" router";
1498 f.disable_logging = addr->router->disable_logging;
1500 else driver_kind = US"routing";
1503 /* If there's an error message set, ensure that it contains only printing
1504 characters - it should, but occasionally things slip in and this at least
1505 stops the log format from getting wrecked. We also scan the message for an LDAP
1506 expansion item that has a password setting, and flatten the password. This is a
1507 fudge, but I don't know a cleaner way of doing this. (If the item is badly
1508 malformed, it won't ever have gone near LDAP.) */
1512 const uschar * s = string_printing(addr->message);
1514 /* deconst cast ok as string_printing known to have alloc'n'copied */
1515 addr->message = expand_hide_passwords(US s);
1518 /* If we used a transport that has one of the "return_output" options set, and
1519 if it did in fact generate some output, then for return_output we treat the
1520 message as failed if it was not already set that way, so that the output gets
1521 returned to the sender, provided there is a sender to send it to. For
1522 return_fail_output, do this only if the delivery failed. Otherwise we just
1523 unlink the file, and remove the name so that if the delivery failed, we don't
1524 try to send back an empty or unwanted file. The log_output options operate only
1525 on a non-empty file.
1527 In any case, we close the message file, because we cannot afford to leave a
1528 file-descriptor for one address while processing (maybe very many) others. */
1530 if (addr->return_file >= 0 && addr->return_filename)
1532 BOOL return_output = FALSE;
1533 struct stat statbuf;
1534 (void)EXIMfsync(addr->return_file);
1536 /* If there is no output, do nothing. */
1538 if (fstat(addr->return_file, &statbuf) == 0 && statbuf.st_size > 0)
1540 transport_instance *tb = addr->transport;
1542 /* Handle logging options */
1545 || result == FAIL && tb->log_fail_output
1546 || result == DEFER && tb->log_defer_output
1550 FILE *f = Ufopen(addr->return_filename, "rb");
1552 log_write(0, LOG_MAIN|LOG_PANIC, "failed to open %s to log output "
1553 "from %s transport: %s", addr->return_filename, tb->name,
1556 if ((s = US Ufgets(big_buffer, big_buffer_size, f)))
1558 uschar *p = big_buffer + Ustrlen(big_buffer);
1560 while (p > big_buffer && isspace(p[-1])) p--;
1562 sp = string_printing(big_buffer);
1563 log_write(0, LOG_MAIN, "<%s>: %s transport output: %s",
1564 addr->address, tb->name, sp);
1569 /* Handle returning options, but only if there is an address to return
1572 if (sender_address[0] != 0 || addr->prop.errors_address)
1573 if (tb->return_output)
1575 addr->transport_return = result = FAIL;
1576 if (addr->basic_errno == 0 && !addr->message)
1577 addr->message = US"return message generated";
1578 return_output = TRUE;
1581 if (tb->return_fail_output && result == FAIL) return_output = TRUE;
1584 /* Get rid of the file unless it might be returned, but close it in
1589 Uunlink(addr->return_filename);
1590 addr->return_filename = NULL;
1591 addr->return_file = -1;
1594 (void)close(addr->return_file);
1597 /* The success case happens only after delivery by a transport. */
1601 addr->next = addr_succeed;
1602 addr_succeed = addr;
1604 /* Call address_done() to ensure that we don't deliver to this address again,
1605 and write appropriate things to the message log. If it is a child address, we
1606 call child_done() to scan the ancestors and mark them complete if this is the
1607 last child to complete. */
1609 address_done(addr, now);
1610 DEBUG(D_deliver) debug_printf("%s delivered\n", addr->address);
1613 deliver_msglog("%s %s: %s%s succeeded\n", now, addr->address,
1614 driver_name, driver_kind);
1617 deliver_msglog("%s %s <%s>: %s%s succeeded\n", now, addr->address,
1618 addr->parent->address, driver_name, driver_kind);
1619 child_done(addr, now);
1622 /* Certificates for logging (via events) */
1624 tls_out.ourcert = addr->ourcert;
1625 addr->ourcert = NULL;
1626 tls_out.peercert = addr->peercert;
1627 addr->peercert = NULL;
1629 tls_out.cipher = addr->cipher;
1630 tls_out.peerdn = addr->peerdn;
1631 tls_out.ocsp = addr->ocsp;
1632 # ifdef SUPPORT_DANE
1633 tls_out.dane_verified = testflag(addr, af_dane_verified);
1637 delivery_log(LOG_MAIN, addr, logchar, NULL);
1640 tls_free_cert(&tls_out.ourcert);
1641 tls_free_cert(&tls_out.peercert);
1642 tls_out.cipher = NULL;
1643 tls_out.peerdn = NULL;
1644 tls_out.ocsp = OCSP_NOT_REQ;
1645 # ifdef SUPPORT_DANE
1646 tls_out.dane_verified = FALSE;
1652 /* Soft failure, or local delivery process failed; freezing may be
1655 else if (result == DEFER || result == PANIC)
1657 if (result == PANIC) logflags |= LOG_PANIC;
1659 /* This puts them on the chain in reverse order. Do not change this, because
1660 the code for handling retries assumes that the one with the retry
1661 information is last. */
1663 addr->next = addr_defer;
1666 /* The only currently implemented special action is to freeze the
1667 message. Logging of this is done later, just before the -H file is
1670 if (addr->special_action == SPECIAL_FREEZE)
1672 f.deliver_freeze = TRUE;
1673 deliver_frozen_at = time(NULL);
1674 update_spool = TRUE;
1677 /* If doing a 2-stage queue run, we skip writing to either the message
1678 log or the main log for SMTP defers. */
1680 if (!f.queue_2stage || addr->basic_errno != 0)
1681 deferral_log(addr, now, logflags, driver_name, driver_kind);
1685 /* Hard failure. If there is an address to which an error message can be sent,
1686 put this address on the failed list. If not, put it on the deferred list and
1687 freeze the mail message for human attention. The latter action can also be
1688 explicitly requested by a router or transport. */
1692 /* If this is a delivery error, or a message for which no replies are
1693 wanted, and the message's age is greater than ignore_bounce_errors_after,
1694 force the af_ignore_error flag. This will cause the address to be discarded
1695 later (with a log entry). */
1697 if (!*sender_address && message_age >= ignore_bounce_errors_after)
1698 addr->prop.ignore_error = TRUE;
1700 /* Freeze the message if requested, or if this is a bounce message (or other
1701 message with null sender) and this address does not have its own errors
1702 address. However, don't freeze if errors are being ignored. The actual code
1703 to ignore occurs later, instead of sending a message. Logging of freezing
1704 occurs later, just before writing the -H file. */
1706 if ( !addr->prop.ignore_error
1707 && ( addr->special_action == SPECIAL_FREEZE
1708 || (sender_address[0] == 0 && !addr->prop.errors_address)
1711 frozen_info = addr->special_action == SPECIAL_FREEZE
1713 : f.sender_local && !f.local_error_message
1714 ? US" (message created with -f <>)"
1715 : US" (delivery error message)";
1716 f.deliver_freeze = TRUE;
1717 deliver_frozen_at = time(NULL);
1718 update_spool = TRUE;
1720 /* The address is put on the defer rather than the failed queue, because
1721 the message is being retained. */
1723 addr->next = addr_defer;
1727 /* Don't put the address on the nonrecipients tree yet; wait until an
1728 error message has been successfully sent. */
1732 addr->next = addr_failed;
1736 failure_log(addr, driver_name ? NULL : driver_kind, now);
1739 /* Ensure logging is turned on again in all cases */
1741 f.disable_logging = FALSE;
1747 /*************************************************
1748 * Address-independent error *
1749 *************************************************/
1751 /* This function is called when there's an error that is not dependent on a
1752 particular address, such as an expansion string failure. It puts the error into
1753 all the addresses in a batch, logs the incident on the main and panic logs, and
1754 clears the expansions. It is mostly called from local_deliver(), but can be
1755 called for a remote delivery via findugid().
1758 logit TRUE if (MAIN+PANIC) logging required
1759 addr the first of the chain of addresses
1761 format format string for error message, or NULL if already set in addr
1762 ... arguments for the format
1768 common_error(BOOL logit, address_item *addr, int code, uschar *format, ...)
1770 address_item *addr2;
1771 addr->basic_errno = code;
1777 va_start(ap, format);
1778 if (!string_vformat(buffer, sizeof(buffer), CS format, ap))
1779 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1780 "common_error expansion was longer than " SIZE_T_FMT, sizeof(buffer));
1782 addr->message = string_copy(buffer);
1785 for (addr2 = addr->next; addr2; addr2 = addr2->next)
1787 addr2->basic_errno = code;
1788 addr2->message = addr->message;
1791 if (logit) log_write(0, LOG_MAIN|LOG_PANIC, "%s", addr->message);
1792 deliver_set_expansions(NULL);
1798 /*************************************************
1799 * Check a "never users" list *
1800 *************************************************/
1802 /* This function is called to check whether a uid is on one of the two "never
1806 uid the uid to be checked
1807 nusers the list to be scanned; the first item in the list is the count
1809 Returns: TRUE if the uid is on the list
1813 check_never_users(uid_t uid, uid_t *nusers)
1816 if (!nusers) return FALSE;
1817 for (i = 1; i <= (int)(nusers[0]); i++) if (nusers[i] == uid) return TRUE;
1823 /*************************************************
1824 * Find uid and gid for a transport *
1825 *************************************************/
1827 /* This function is called for both local and remote deliveries, to find the
1828 uid/gid under which to run the delivery. The values are taken preferentially
1829 from the transport (either explicit or deliver_as_creator), then from the
1830 address (i.e. the router), and if nothing is set, the exim uid/gid are used. If
1831 the resulting uid is on the "never_users" or the "fixed_never_users" list, a
1832 panic error is logged, and the function fails (which normally leads to delivery
1836 addr the address (possibly a chain)
1838 uidp pointer to uid field
1839 gidp pointer to gid field
1840 igfp pointer to the use_initgroups field
1842 Returns: FALSE if failed - error has been set in address(es)
1846 findugid(address_item *addr, transport_instance *tp, uid_t *uidp, gid_t *gidp,
1850 BOOL gid_set = FALSE;
1852 /* Default initgroups flag comes from the transport */
1854 *igfp = tp->initgroups;
1856 /* First see if there's a gid on the transport, either fixed or expandable.
1857 The expanding function always logs failure itself. */
1864 else if (tp->expand_gid)
1866 if (!route_find_expanded_group(tp->expand_gid, tp->name, US"transport", gidp,
1869 common_error(FALSE, addr, ERRNO_GIDFAIL, NULL);
1875 /* If the transport did not set a group, see if the router did. */
1877 if (!gid_set && testflag(addr, af_gid_set))
1883 /* Pick up a uid from the transport if one is set. */
1885 if (tp->uid_set) *uidp = tp->uid;
1887 /* Otherwise, try for an expandable uid field. If it ends up as a numeric id,
1888 it does not provide a passwd value from which a gid can be taken. */
1890 else if (tp->expand_uid)
1893 if (!route_find_expanded_user(tp->expand_uid, tp->name, US"transport", &pw,
1894 uidp, &(addr->message)))
1896 common_error(FALSE, addr, ERRNO_UIDFAIL, NULL);
1906 /* If the transport doesn't set the uid, test the deliver_as_creator flag. */
1908 else if (tp->deliver_as_creator)
1910 *uidp = originator_uid;
1913 *gidp = originator_gid;
1918 /* Otherwise see if the address specifies the uid and if so, take it and its
1921 else if (testflag(addr, af_uid_set))
1924 *igfp = testflag(addr, af_initgroups);
1927 /* Nothing has specified the uid - default to the Exim user, and group if the
1940 /* If no gid is set, it is a disaster. We default to the Exim gid only if
1941 defaulting to the Exim uid. In other words, if the configuration has specified
1942 a uid, it must also provide a gid. */
1946 common_error(TRUE, addr, ERRNO_GIDFAIL, US"User set without group for "
1947 "%s transport", tp->name);
1951 /* Check that the uid is not on the lists of banned uids that may not be used
1952 for delivery processes. */
1954 nuname = check_never_users(*uidp, never_users)
1956 : check_never_users(*uidp, fixed_never_users)
1957 ? US"fixed_never_users"
1961 common_error(TRUE, addr, ERRNO_UIDFAIL, US"User %ld set for %s transport "
1962 "is on the %s list", (long int)(*uidp), tp->name, nuname);
1974 /*************************************************
1975 * Check the size of a message for a transport *
1976 *************************************************/
1978 /* Checks that the message isn't too big for the selected transport.
1979 This is called only when it is known that the limit is set.
1983 addr the (first) address being delivered
1986 DEFER expansion failed or did not yield an integer
1987 FAIL message too big
1991 check_message_size(transport_instance *tp, address_item *addr)
1996 deliver_set_expansions(addr);
1997 size_limit = expand_string_integer(tp->message_size_limit, TRUE);
1998 deliver_set_expansions(NULL);
2000 if (expand_string_message)
2003 addr->message = size_limit == -1
2004 ? string_sprintf("failed to expand message_size_limit "
2005 "in %s transport: %s", tp->name, expand_string_message)
2006 : string_sprintf("invalid message_size_limit "
2007 "in %s transport: %s", tp->name, expand_string_message);
2009 else if (size_limit > 0 && message_size > size_limit)
2013 string_sprintf("message is too big (transport limit = %d)",
2022 /*************************************************
2023 * Transport-time check for a previous delivery *
2024 *************************************************/
2026 /* Check that this base address hasn't previously been delivered to its routed
2027 transport. If it has been delivered, mark it done. The check is necessary at
2028 delivery time in order to handle homonymic addresses correctly in cases where
2029 the pattern of redirection changes between delivery attempts (so the unique
2030 fields change). Non-homonymic previous delivery is detected earlier, at routing
2031 time (which saves unnecessary routing).
2034 addr the address item
2035 testing TRUE if testing wanted only, without side effects
2037 Returns: TRUE if previously delivered by the transport
2041 previously_transported(address_item *addr, BOOL testing)
2043 (void)string_format(big_buffer, big_buffer_size, "%s/%s",
2044 addr->unique + (testflag(addr, af_homonym)? 3:0), addr->transport->name);
2046 if (tree_search(tree_nonrecipients, big_buffer) != 0)
2048 DEBUG(D_deliver|D_route|D_transport)
2049 debug_printf("%s was previously delivered (%s transport): discarded\n",
2050 addr->address, addr->transport->name);
2051 if (!testing) child_done(addr, tod_stamp(tod_log));
2060 /******************************************************
2061 * Check for a given header in a header string *
2062 ******************************************************/
2064 /* This function is used when generating quota warnings. The configuration may
2065 specify any header lines it likes in quota_warn_message. If certain of them are
2066 missing, defaults are inserted, so we need to be able to test for the presence
2070 hdr the required header name
2071 hstring the header string
2073 Returns: TRUE the header is in the string
2074 FALSE the header is not in the string
2078 contains_header(uschar *hdr, uschar *hstring)
2080 int len = Ustrlen(hdr);
2081 uschar *p = hstring;
2084 if (strncmpic(p, hdr, len) == 0)
2087 while (*p == ' ' || *p == '\t') p++;
2088 if (*p == ':') return TRUE;
2090 while (*p != 0 && *p != '\n') p++;
2091 if (*p == '\n') p++;
2099 /*************************************************
2100 * Perform a local delivery *
2101 *************************************************/
2103 /* Each local delivery is performed in a separate process which sets its
2104 uid and gid as specified. This is a safer way than simply changing and
2105 restoring using seteuid(); there is a body of opinion that seteuid() cannot be
2106 used safely. From release 4, Exim no longer makes any use of it. Besides, not
2107 all systems have seteuid().
2109 If the uid/gid are specified in the transport_instance, they are used; the
2110 transport initialization must ensure that either both or neither are set.
2111 Otherwise, the values associated with the address are used. If neither are set,
2112 it is a configuration error.
2114 The transport or the address may specify a home directory (transport over-
2115 rides), and if they do, this is set as $home. If neither have set a working
2116 directory, this value is used for that as well. Otherwise $home is left unset
2117 and the cwd is set to "/" - a directory that should be accessible to all users.
2119 Using a separate process makes it more complicated to get error information
2120 back. We use a pipe to pass the return code and also an error code and error
2121 text string back to the parent process.
2124 addr points to an address block for this delivery; for "normal" local
2125 deliveries this is the only address to be delivered, but for
2126 pseudo-remote deliveries (e.g. by batch SMTP to a file or pipe)
2127 a number of addresses can be handled simultaneously, and in this
2128 case addr will point to a chain of addresses with the same
2131 shadowing TRUE if running a shadow transport; this causes output from pipes
2138 deliver_local(address_item *addr, BOOL shadowing)
2140 BOOL use_initgroups;
2143 int status, len, rc;
2146 uschar *working_directory;
2147 address_item *addr2;
2148 transport_instance *tp = addr->transport;
2150 /* Set up the return path from the errors or sender address. If the transport
2151 has its own return path setting, expand it and replace the existing value. */
2153 if(addr->prop.errors_address)
2154 return_path = addr->prop.errors_address;
2155 #ifdef EXPERIMENTAL_SRS
2156 else if (addr->prop.srs_sender)
2157 return_path = addr->prop.srs_sender;
2160 return_path = sender_address;
2162 if (tp->return_path)
2164 uschar *new_return_path = expand_string(tp->return_path);
2165 if (!new_return_path)
2167 if (!f.expand_string_forcedfail)
2169 common_error(TRUE, addr, ERRNO_EXPANDFAIL,
2170 US"Failed to expand return path \"%s\" in %s transport: %s",
2171 tp->return_path, tp->name, expand_string_message);
2175 else return_path = new_return_path;
2178 /* For local deliveries, one at a time, the value used for logging can just be
2179 set directly, once and for all. */
2181 used_return_path = return_path;
2183 /* Sort out the uid, gid, and initgroups flag. If an error occurs, the message
2184 gets put into the address(es), and the expansions are unset, so we can just
2187 if (!findugid(addr, tp, &uid, &gid, &use_initgroups)) return;
2189 /* See if either the transport or the address specifies a home directory. A
2190 home directory set in the address may already be expanded; a flag is set to
2191 indicate that. In other cases we must expand it. */
2193 if ( (deliver_home = tp->home_dir) /* Set in transport, or */
2194 || ( (deliver_home = addr->home_dir) /* Set in address and */
2195 && !testflag(addr, af_home_expanded) /* not expanded */
2198 uschar *rawhome = deliver_home;
2199 deliver_home = NULL; /* in case it contains $home */
2200 if (!(deliver_home = expand_string(rawhome)))
2202 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"home directory \"%s\" failed "
2203 "to expand for %s transport: %s", rawhome, tp->name,
2204 expand_string_message);
2207 if (*deliver_home != '/')
2209 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"home directory path \"%s\" "
2210 "is not absolute for %s transport", deliver_home, tp->name);
2215 /* See if either the transport or the address specifies a current directory,
2216 and if so, expand it. If nothing is set, use the home directory, unless it is
2217 also unset in which case use "/", which is assumed to be a directory to which
2218 all users have access. It is necessary to be in a visible directory for some
2219 operating systems when running pipes, as some commands (e.g. "rm" under Solaris
2220 2.5) require this. */
2222 working_directory = tp->current_dir ? tp->current_dir : addr->current_dir;
2223 if (working_directory)
2225 uschar *raw = working_directory;
2226 if (!(working_directory = expand_string(raw)))
2228 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"current directory \"%s\" "
2229 "failed to expand for %s transport: %s", raw, tp->name,
2230 expand_string_message);
2233 if (*working_directory != '/')
2235 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"current directory path "
2236 "\"%s\" is not absolute for %s transport", working_directory, tp->name);
2240 else working_directory = deliver_home ? deliver_home : US"/";
2242 /* If one of the return_output flags is set on the transport, create and open a
2243 file in the message log directory for the transport to write its output onto.
2244 This is mainly used by pipe transports. The file needs to be unique to the
2245 address. This feature is not available for shadow transports. */
2248 && ( tp->return_output || tp->return_fail_output
2249 || tp->log_output || tp->log_fail_output || tp->log_defer_output
2254 addr->return_filename =
2255 spool_fname(US"msglog", message_subdir, message_id,
2256 string_sprintf("-%d-%d", getpid(), return_count++));
2258 if ((addr->return_file = open_msglog_file(addr->return_filename, 0400, &error)) < 0)
2260 common_error(TRUE, addr, errno, US"Unable to %s file for %s transport "
2261 "to return message: %s", error, tp->name, strerror(errno));
2266 /* Create the pipe for inter-process communication. */
2270 common_error(TRUE, addr, ERRNO_PIPEFAIL, US"Creation of pipe failed: %s",
2275 /* Now fork the process to do the real work in the subprocess, but first
2276 ensure that all cached resources are freed so that the subprocess starts with
2277 a clean slate and doesn't interfere with the parent process. */
2281 if ((pid = fork()) == 0)
2283 BOOL replicate = TRUE;
2285 /* Prevent core dumps, as we don't want them in users' home directories.
2286 HP-UX doesn't have RLIMIT_CORE; I don't know how to do this in that
2287 system. Some experimental/developing systems (e.g. GNU/Hurd) may define
2288 RLIMIT_CORE but not support it in setrlimit(). For such systems, do not
2289 complain if the error is "not supported".
2291 There are two scenarios where changing the max limit has an effect. In one,
2292 the user is using a .forward and invoking a command of their choice via pipe;
2293 for these, we do need the max limit to be 0 unless the admin chooses to
2294 permit an increased limit. In the other, the command is invoked directly by
2295 the transport and is under administrator control, thus being able to raise
2296 the limit aids in debugging. So there's no general always-right answer.
2298 Thus we inhibit core-dumps completely but let individual transports, while
2299 still root, re-raise the limits back up to aid debugging. We make the
2300 default be no core-dumps -- few enough people can use core dumps in
2301 diagnosis that it's reasonable to make them something that has to be explicitly requested.
2308 if (setrlimit(RLIMIT_CORE, &rl) < 0)
2310 # ifdef SETRLIMIT_NOT_SUPPORTED
2311 if (errno != ENOSYS && errno != ENOTSUP)
2313 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_CORE) failed: %s",
2318 /* Reset the random number generator, so different processes don't all
2319 have the same sequence. */
2323 /* If the transport has a setup entry, call this first, while still
2324 privileged. (Appendfile uses this to expand quota, for example, while
2325 able to read private files.) */
2327 if (addr->transport->setup)
2328 switch((addr->transport->setup)(addr->transport, addr, NULL, uid, gid,
2332 addr->transport_return = DEFER;
2336 addr->transport_return = PANIC;
2340 /* Ignore SIGINT and SIGTERM during delivery. Also ignore SIGUSR1, as
2341 when the process becomes unprivileged, it won't be able to write to the
2342 process log. SIGHUP is ignored throughout exim, except when it is being
2345 signal(SIGINT, SIG_IGN);
2346 signal(SIGTERM, SIG_IGN);
2347 signal(SIGUSR1, SIG_IGN);
2349 /* Close the unwanted half of the pipe, and set close-on-exec for the other
2350 half - for transports that exec things (e.g. pipe). Then set the required
2353 (void)close(pfd[pipe_read]);
2354 (void)fcntl(pfd[pipe_write], F_SETFD, fcntl(pfd[pipe_write], F_GETFD) |
2356 exim_setugid(uid, gid, use_initgroups,
2357 string_sprintf("local delivery to %s <%s> transport=%s", addr->local_part,
2358 addr->address, addr->transport->name));
2362 address_item *batched;
2363 debug_printf(" home=%s current=%s\n", deliver_home, working_directory);
2364 for (batched = addr->next; batched; batched = batched->next)
2365 debug_printf("additional batched address: %s\n", batched->address);
2368 /* Set an appropriate working directory. */
2370 if (Uchdir(working_directory) < 0)
2372 addr->transport_return = DEFER;
2373 addr->basic_errno = errno;
2374 addr->message = string_sprintf("failed to chdir to %s", working_directory);
2377 /* If successful, call the transport */
2382 set_process_info("delivering %s to %s using %s", message_id,
2383 addr->local_part, addr->transport->name);
2385 /* Setting this global in the subprocess means we need never clear it */
2386 transport_name = addr->transport->name;
2388 /* If a transport filter has been specified, set up its argument list.
2389 Any errors will get put into the address, and FALSE yielded. */
2391 if (addr->transport->filter_command)
2393 ok = transport_set_up_command(&transport_filter_argv,
2394 addr->transport->filter_command,
2395 TRUE, PANIC, addr, US"transport filter", NULL);
2396 transport_filter_timeout = addr->transport->filter_timeout;
2398 else transport_filter_argv = NULL;
2402 debug_print_string(addr->transport->debug_string);
2403 replicate = !(addr->transport->info->code)(addr->transport, addr);
2407 /* Pass the results back down the pipe. If necessary, first replicate the
2408 status in the top address to the others in the batch. The label is the
2409 subject of a goto when a call to the transport's setup function fails. We
2410 pass the pointer to the transport back in case it got changed as a result of
2411 file_format in appendfile. */
2415 if (replicate) replicate_status(addr);
2416 for (addr2 = addr; addr2; addr2 = addr2->next)
2419 int local_part_length = Ustrlen(addr2->local_part);
2423 if( (ret = write(pfd[pipe_write], &addr2->transport_return, sizeof(int))) != sizeof(int)
2424 || (ret = write(pfd[pipe_write], &transport_count, sizeof(transport_count))) != sizeof(transport_count)
2425 || (ret = write(pfd[pipe_write], &addr2->flags, sizeof(addr2->flags))) != sizeof(addr2->flags)
2426 || (ret = write(pfd[pipe_write], &addr2->basic_errno, sizeof(int))) != sizeof(int)
2427 || (ret = write(pfd[pipe_write], &addr2->more_errno, sizeof(int))) != sizeof(int)
2428 || (ret = write(pfd[pipe_write], &addr2->delivery_usec, sizeof(int))) != sizeof(int)
2429 || (ret = write(pfd[pipe_write], &addr2->special_action, sizeof(int))) != sizeof(int)
2430 || (ret = write(pfd[pipe_write], &addr2->transport,
2431 sizeof(transport_instance *))) != sizeof(transport_instance *)
2433 /* For a file delivery, pass back the local part, in case the original
2434 was only part of the final delivery path. This gives more complete
2437 || (testflag(addr2, af_file)
2438 && ( (ret = write(pfd[pipe_write], &local_part_length, sizeof(int))) != sizeof(int)
2439 || (ret = write(pfd[pipe_write], addr2->local_part, local_part_length)) != local_part_length
2443 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s",
2444 ret == -1 ? strerror(errno) : "short write");
2446 /* Now any messages */
2448 for (i = 0, s = addr2->message; i < 2; i++, s = addr2->user_message)
2450 int message_length = s ? Ustrlen(s) + 1 : 0;
2451 if( (ret = write(pfd[pipe_write], &message_length, sizeof(int))) != sizeof(int)
2452 || message_length > 0 && (ret = write(pfd[pipe_write], s, message_length)) != message_length
2454 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s",
2455 ret == -1 ? strerror(errno) : "short write");
2459 /* OK, this process is now done. Free any cached resources that it opened,
2460 and close the pipe we were writing down before exiting. */
2462 (void)close(pfd[pipe_write]);
2467 /* Back in the main process: panic if the fork did not succeed. This seems
2468 better than returning an error - if forking is failing it is probably best
2469 not to try other deliveries for this message. */
2472 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Fork failed for local delivery to %s",
2475 /* Read the pipe to get the delivery status codes and error messages. Our copy
2476 of the writing end must be closed first, as otherwise read() won't return zero
2477 on an empty pipe. We check that a status exists for each address before
2478 overwriting the address structure. If data is missing, the default DEFER status
2479 will remain. Afterwards, close the reading end. */
2481 (void)close(pfd[pipe_write]);
2483 for (addr2 = addr; addr2; addr2 = addr2->next)
2485 if ((len = read(pfd[pipe_read], &status, sizeof(int))) > 0)
2490 addr2->transport_return = status;
2491 len = read(pfd[pipe_read], &transport_count,
2492 sizeof(transport_count));
2493 len = read(pfd[pipe_read], &addr2->flags, sizeof(addr2->flags));
2494 len = read(pfd[pipe_read], &addr2->basic_errno, sizeof(int));
2495 len = read(pfd[pipe_read], &addr2->more_errno, sizeof(int));
2496 len = read(pfd[pipe_read], &addr2->delivery_usec, sizeof(int));
2497 len = read(pfd[pipe_read], &addr2->special_action, sizeof(int));
2498 len = read(pfd[pipe_read], &addr2->transport,
2499 sizeof(transport_instance *));
2501 if (testflag(addr2, af_file))
2504 if ( read(pfd[pipe_read], &llen, sizeof(int)) != sizeof(int)
2505 || llen > 64*4 /* limit from rfc 5821, times I18N factor */
2508 log_write(0, LOG_MAIN|LOG_PANIC, "bad local_part length read"
2509 " from delivery subprocess");
2512 /* sanity-checked llen so disable the Coverity error */
2513 /* coverity[tainted_data] */
2514 if (read(pfd[pipe_read], big_buffer, llen) != llen)
2516 log_write(0, LOG_MAIN|LOG_PANIC, "bad local_part read"
2517 " from delivery subprocess");
2520 big_buffer[llen] = 0;
2521 addr2->local_part = string_copy(big_buffer);
2524 for (i = 0, sptr = &addr2->message; i < 2; i++, sptr = &addr2->user_message)
2527 len = read(pfd[pipe_read], &message_length, sizeof(int));
2528 if (message_length > 0)
2530 len = read(pfd[pipe_read], big_buffer, message_length);
2531 big_buffer[big_buffer_size-1] = '\0'; /* guard byte */
2532 if (len > 0) *sptr = string_copy(big_buffer);
2539 log_write(0, LOG_MAIN|LOG_PANIC, "failed to read delivery status for %s "
2540 "from delivery subprocess", addr2->unique);
2545 (void)close(pfd[pipe_read]);
2547 /* Unless shadowing, write all successful addresses immediately to the journal
2548 file, to ensure they are recorded asap. For homonymic addresses, use the base
2549 address plus the transport name. Failure to write the journal is panic-worthy,
2550 but don't stop, as it may prove possible subsequently to update the spool file
2551 in order to record the delivery. */
2555 for (addr2 = addr; addr2; addr2 = addr2->next)
2556 if (addr2->transport_return == OK)
2558 if (testflag(addr2, af_homonym))
2559 sprintf(CS big_buffer, "%.500s/%s\n", addr2->unique + 3, tp->name);
2561 sprintf(CS big_buffer, "%.500s\n", addr2->unique);
2563 /* In the test harness, wait just a bit to let the subprocess finish off
2564 any debug output etc first. */
2566 if (f.running_in_test_harness) millisleep(300);
2568 DEBUG(D_deliver) debug_printf("journalling %s", big_buffer);
2569 len = Ustrlen(big_buffer);
2570 if (write(journal_fd, big_buffer, len) != len)
2571 log_write(0, LOG_MAIN|LOG_PANIC, "failed to update journal for %s: %s",
2572 big_buffer, strerror(errno));
2575 /* Ensure the journal file is pushed out to disk. */
2577 if (EXIMfsync(journal_fd) < 0)
2578 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s",
2582 /* Wait for the process to finish. If it terminates with a non-zero code,
2583 freeze the message (except for SIGTERM, SIGKILL and SIGQUIT), but leave the
2584 status values of all the addresses as they are. Take care to handle the case
2585 when the subprocess doesn't seem to exist. This has been seen on one system
2586 when Exim was called from an MUA that set SIGCHLD to SIG_IGN. When that
2587 happens, wait() doesn't recognize the termination of child processes. Exim now
2588 resets SIGCHLD to SIG_DFL, but this code should still be robust. */
2590 while ((rc = wait(&status)) != pid)
2591 if (rc < 0 && errno == ECHILD) /* Process has vanished */
2593 log_write(0, LOG_MAIN, "%s transport process vanished unexpectedly",
2594 addr->transport->driver_name);
2599 if ((status & 0xffff) != 0)
2601 int msb = (status >> 8) & 255;
2602 int lsb = status & 255;
2603 int code = (msb == 0)? (lsb & 0x7f) : msb;
2604 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
2605 addr->special_action = SPECIAL_FREEZE;
2606 log_write(0, LOG_MAIN|LOG_PANIC, "%s transport process returned non-zero "
2607 "status 0x%04x: %s %d",
2608 addr->transport->driver_name,
2610 msb == 0 ? "terminated by signal" : "exit code",
2614 /* If SPECIAL_WARN is set in the top address, send a warning message. */
2616 if (addr->special_action == SPECIAL_WARN && addr->transport->warn_message)
2619 uschar *warn_message;
2622 DEBUG(D_deliver) debug_printf("Warning message requested by transport\n");
2624 if (!(warn_message = expand_string(addr->transport->warn_message)))
2625 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand \"%s\" (warning "
2626 "message for %s transport): %s", addr->transport->warn_message,
2627 addr->transport->name, expand_string_message);
2629 else if ((pid = child_open_exim(&fd)) > 0)
2631 FILE *f = fdopen(fd, "wb");
2632 if (errors_reply_to && !contains_header(US"Reply-To", warn_message))
2633 fprintf(f, "Reply-To: %s\n", errors_reply_to);
2634 fprintf(f, "Auto-Submitted: auto-replied\n");
2635 if (!contains_header(US"From", warn_message))
2637 fprintf(f, "%s", CS warn_message);
2639 /* Close and wait for child process to complete, without a timeout. */
2642 (void)child_close(pid, 0);
2645 addr->special_action = SPECIAL_NONE;
2652 /* Check transport for the given concurrency limit. Return TRUE if over
2653 the limit (or an expansion failure), else FALSE and if there was a limit,
2654 the key for the hints database used for the concurrency count. */
2657 tpt_parallel_check(transport_instance * tp, address_item * addr, uschar ** key)
2659 unsigned max_parallel;
2661 if (!tp->max_parallel) return FALSE;
2663 max_parallel = (unsigned) expand_string_integer(tp->max_parallel, TRUE);
2664 if (expand_string_message)
2666 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand max_parallel option "
2667 "in %s transport (%s): %s", tp->name, addr->address,
2668 expand_string_message);
2672 if (max_parallel > 0)
2674 uschar * serialize_key = string_sprintf("tpt-serialize-%s", tp->name);
2675 if (!enq_start(serialize_key, max_parallel))
2677 address_item * next;
2679 debug_printf("skipping tpt %s because concurrency limit %u reached\n",
2680 tp->name, max_parallel);
2684 addr->message = US"concurrency limit reached for transport";
2685 addr->basic_errno = ERRNO_TRETRY;
2686 post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_TRANSPORT, 0);
2687 } while ((addr = next));
2690 *key = serialize_key;
2697 /*************************************************
2698 * Do local deliveries *
2699 *************************************************/
2701 /* This function processes the list of addresses in addr_local. True local
2702 deliveries are always done one address at a time. However, local deliveries can
2703 be batched up in some cases. Typically this is when writing batched SMTP output
2704 files for use by some external transport mechanism, or when running local
2705 deliveries over LMTP.
2712 do_local_deliveries(void)
2715 open_db *dbm_file = NULL;
2716 time_t now = time(NULL);
2718 /* Loop until we have exhausted the supply of local deliveries */
2722 struct timeval delivery_start;
2723 struct timeval deliver_time;
2724 address_item *addr2, *addr3, *nextaddr;
2725 int logflags = LOG_MAIN;
2726 int logchar = f.dont_deliver? '*' : '=';
2727 transport_instance *tp;
2728 uschar * serialize_key = NULL;
2730 /* Pick the first undelivered address off the chain */
2732 address_item *addr = addr_local;
2733 addr_local = addr->next;
2736 DEBUG(D_deliver|D_transport)
2737 debug_printf("--------> %s <--------\n", addr->address);
2739 /* An internal disaster if there is no transport. Should not occur! */
2741 if (!(tp = addr->transport))
2743 logflags |= LOG_PANIC;
2744 f.disable_logging = FALSE; /* Jic */
2745 addr->message = addr->router
2746 ? string_sprintf("No transport set by %s router", addr->router->name)
2747 : string_sprintf("No transport set by system filter");
2748 post_process_one(addr, DEFER, logflags, EXIM_DTYPE_TRANSPORT, 0);
2752 /* Check that this base address hasn't previously been delivered to this
2753 transport. The check is necessary at this point to handle homonymic addresses
2754 correctly in cases where the pattern of redirection changes between delivery
2755 attempts. Non-homonymic previous delivery is detected earlier, at routing
2758 if (previously_transported(addr, FALSE)) continue;
2760 /* There are weird cases where logging is disabled */
2762 f.disable_logging = tp->disable_logging;
2764 /* Check for batched addresses and possible amalgamation. Skip all the work
2765 if either batch_max <= 1 or there aren't any other addresses for local
2768 if (tp->batch_max > 1 && addr_local)
2770 int batch_count = 1;
2771 BOOL uses_dom = readconf_depends((driver_instance *)tp, US"domain");
2772 BOOL uses_lp = ( testflag(addr, af_pfr)
2773 && (testflag(addr, af_file) || addr->local_part[0] == '|')
2775 || readconf_depends((driver_instance *)tp, US"local_part");
2776 uschar *batch_id = NULL;
2777 address_item **anchor = &addr_local;
2778 address_item *last = addr;
2781 /* Expand the batch_id string for comparison with other addresses.
2782 Expansion failure suppresses batching. */
2786 deliver_set_expansions(addr);
2787 batch_id = expand_string(tp->batch_id);
2788 deliver_set_expansions(NULL);
2791 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2792 "in %s transport (%s): %s", tp->name, addr->address,
2793 expand_string_message);
2794 batch_count = tp->batch_max;
2798 /* Until we reach the batch_max limit, pick off addresses which have the
2799 same characteristics. These are:
2802 not previously delivered (see comment about 50 lines above)
2803 same local part if the transport's configuration contains $local_part
2804 or if this is a file or pipe delivery from a redirection
2805 same domain if the transport's configuration contains $domain
2807 same additional headers
2808 same headers to be removed
2809 same uid/gid for running the transport
2810 same first host if a host list is set
2813 while ((next = *anchor) && batch_count < tp->batch_max)
2816 tp == next->transport
2817 && !previously_transported(next, TRUE)
2818 && testflag(addr, af_pfr) == testflag(next, af_pfr)
2819 && testflag(addr, af_file) == testflag(next, af_file)
2820 && (!uses_lp || Ustrcmp(next->local_part, addr->local_part) == 0)
2821 && (!uses_dom || Ustrcmp(next->domain, addr->domain) == 0)
2822 && same_strings(next->prop.errors_address, addr->prop.errors_address)
2823 && same_headers(next->prop.extra_headers, addr->prop.extra_headers)
2824 && same_strings(next->prop.remove_headers, addr->prop.remove_headers)
2825 && same_ugid(tp, addr, next)
2826 && ( !addr->host_list && !next->host_list
2829 && Ustrcmp(addr->host_list->name, next->host_list->name) == 0
2832 /* If the transport has a batch_id setting, batch_id will be non-NULL
2833 from the expansion outside the loop. Expand for this address and compare.
2834 Expansion failure makes this address ineligible for batching. */
2839 address_item *save_nextnext = next->next;
2840 next->next = NULL; /* Expansion for a single address */
2841 deliver_set_expansions(next);
2842 next->next = save_nextnext;
2843 bid = expand_string(tp->batch_id);
2844 deliver_set_expansions(NULL);
2847 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2848 "in %s transport (%s): %s", tp->name, next->address,
2849 expand_string_message);
2852 else ok = (Ustrcmp(batch_id, bid) == 0);
2855 /* Take address into batch if OK. */
2859 *anchor = next->next; /* Include the address */
2865 else anchor = &next->next; /* Skip the address */
2869 /* We now have one or more addresses that can be delivered in a batch. Check
2870 whether the transport is prepared to accept a message of this size. If not,
2871 fail them all forthwith. If the expansion fails, or does not yield an
2872 integer, defer delivery. */
2874 if (tp->message_size_limit)
2876 int rc = check_message_size(tp, addr);
2879 replicate_status(addr);
2883 post_process_one(addr, rc, logflags, EXIM_DTYPE_TRANSPORT, 0);
2886 continue; /* With next batch of addresses */
2890 /* If we are not running the queue, or if forcing, all deliveries will be
2891 attempted. Otherwise, we must respect the retry times for each address. Even
2892 when not doing this, we need to set up the retry key string, and determine
2893 whether a retry record exists, because after a successful delivery, a delete
2894 retry item must be set up. Keep the retry database open only for the duration
2895 of these checks, rather than for all local deliveries, because some local
2896 deliveries (e.g. to pipes) can take a substantial time. */
2898 if (!(dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE)))
2900 DEBUG(D_deliver|D_retry|D_hints_lookup)
2901 debug_printf("no retry data available\n");
2908 BOOL ok = TRUE; /* to deliver this address */
2911 /* Set up the retry key to include the domain or not, and change its
2912 leading character from "R" to "T". Must make a copy before doing this,
2913 because the old key may be pointed to from a "delete" retry item after
2916 retry_key = string_copy(
2917 tp->retry_use_local_part ? addr2->address_retry_key :
2918 addr2->domain_retry_key);
2921 /* Inspect the retry data. If there is no hints file, delivery happens. */
2925 dbdata_retry *retry_record = dbfn_read(dbm_file, retry_key);
2927 /* If there is no retry record, delivery happens. If there is,
2928 remember it exists so it can be deleted after a successful delivery. */
2932 setflag(addr2, af_lt_retry_exists);
2934 /* A retry record exists for this address. If queue running and not
2935 forcing, inspect its contents. If the record is too old, or if its
2936 retry time has come, or if it has passed its cutoff time, delivery
2941 debug_printf("retry record exists: age=%s ",
2942 readconf_printtime(now - retry_record->time_stamp));
2943 debug_printf("(max %s)\n", readconf_printtime(retry_data_expire));
2944 debug_printf(" time to retry = %s expired = %d\n",
2945 readconf_printtime(retry_record->next_try - now),
2946 retry_record->expired);
2949 if (f.queue_running && !f.deliver_force)
2951 ok = (now - retry_record->time_stamp > retry_data_expire)
2952 || (now >= retry_record->next_try)
2953 || retry_record->expired;
2955 /* If we haven't reached the retry time, there is one more check
2956 to do, which is for the ultimate address timeout. */
2959 ok = retry_ultimate_address_timeout(retry_key, addr2->domain,
2963 else DEBUG(D_retry) debug_printf("no retry record exists\n");
2966 /* This address is to be delivered. Leave it on the chain. */
2971 addr2 = addr2->next;
2974 /* This address is to be deferred. Take it out of the chain, and
2975 post-process it as complete. Must take it out of the chain first,
2976 because post processing puts it on another chain. */
2980 address_item *this = addr2;
2981 this->message = US"Retry time not yet reached";
2982 this->basic_errno = ERRNO_LRETRY;
2983 addr2 = addr3 ? (addr3->next = addr2->next)
2984 : (addr = addr2->next);
2985 post_process_one(this, DEFER, logflags, EXIM_DTYPE_TRANSPORT, 0);
2989 if (dbm_file) dbfn_close(dbm_file);
2991 /* If there are no addresses left on the chain, they all deferred. Loop
2992 for the next set of addresses. */
2994 if (!addr) continue;
2996 /* If the transport is limited for parallellism, enforce that here.
2997 We use a hints DB entry, incremented here and decremented after
2998 the transport (and any shadow transport) completes. */
3000 if (tpt_parallel_check(tp, addr, &serialize_key))
3002 if (expand_string_message)
3004 logflags |= LOG_PANIC;
3008 post_process_one(addr, DEFER, logflags, EXIM_DTYPE_TRANSPORT, 0);
3009 } while ((addr = addr2));
3011 continue; /* Loop for the next set of addresses. */
3015 /* So, finally, we do have some addresses that can be passed to the
3016 transport. Before doing so, set up variables that are relevant to a
3019 deliver_set_expansions(addr);
3021 gettimeofday(&delivery_start, NULL);
3022 deliver_local(addr, FALSE);
3023 timesince(&deliver_time, &delivery_start);
3025 /* If a shadow transport (which must perforce be another local transport), is
3026 defined, and its condition is met, we must pass the message to the shadow
3027 too, but only those addresses that succeeded. We do this by making a new
3028 chain of addresses - also to keep the original chain uncontaminated. We must
3029 use a chain rather than doing it one by one, because the shadow transport may
3032 NOTE: if the condition fails because of a lookup defer, there is nothing we
3036 && ( !tp->shadow_condition
3037 || expand_check_condition(tp->shadow_condition, tp->name, US"transport")
3040 transport_instance *stp;
3041 address_item *shadow_addr = NULL;
3042 address_item **last = &shadow_addr;
3044 for (stp = transports; stp; stp = stp->next)
3045 if (Ustrcmp(stp->name, tp->shadow) == 0) break;
3048 log_write(0, LOG_MAIN|LOG_PANIC, "shadow transport \"%s\" not found ",
3051 /* Pick off the addresses that have succeeded, and make clones. Put into
3052 the shadow_message field a pointer to the shadow_message field of the real
3055 else for (addr2 = addr; addr2; addr2 = addr2->next)
3056 if (addr2->transport_return == OK)
3058 addr3 = store_get(sizeof(address_item));
3061 addr3->shadow_message = US &addr2->shadow_message;
3062 addr3->transport = stp;
3063 addr3->transport_return = DEFER;
3064 addr3->return_filename = NULL;
3065 addr3->return_file = -1;
3067 last = &addr3->next;
3070 /* If we found any addresses to shadow, run the delivery, and stick any
3071 message back into the shadow_message field in the original. */
3075 int save_count = transport_count;
3077 DEBUG(D_deliver|D_transport)
3078 debug_printf(">>>>>>>>>>>>>>>> Shadow delivery >>>>>>>>>>>>>>>>\n");
3079 deliver_local(shadow_addr, TRUE);
3081 for(; shadow_addr; shadow_addr = shadow_addr->next)
3083 int sresult = shadow_addr->transport_return;
3084 *(uschar **)shadow_addr->shadow_message =
3086 ? string_sprintf(" ST=%s", stp->name)
3087 : string_sprintf(" ST=%s (%s%s%s)", stp->name,
3088 shadow_addr->basic_errno <= 0
3090 : US strerror(shadow_addr->basic_errno),
3091 shadow_addr->basic_errno <= 0 || !shadow_addr->message
3094 shadow_addr->message
3095 ? shadow_addr->message
3096 : shadow_addr->basic_errno <= 0
3100 DEBUG(D_deliver|D_transport)
3101 debug_printf("%s shadow transport returned %s for %s\n",
3103 sresult == OK ? "OK" :
3104 sresult == DEFER ? "DEFER" :
3105 sresult == FAIL ? "FAIL" :
3106 sresult == PANIC ? "PANIC" : "?",
3107 shadow_addr->address);
3110 DEBUG(D_deliver|D_transport)
3111 debug_printf(">>>>>>>>>>>>>>>> End shadow delivery >>>>>>>>>>>>>>>>\n");
3113 transport_count = save_count; /* Restore original transport count */
3117 /* Cancel the expansions that were set up for the delivery. */
3119 deliver_set_expansions(NULL);
3121 /* If the transport was parallelism-limited, decrement the hints DB record. */
3123 if (serialize_key) enq_end(serialize_key);
3125 /* Now we can process the results of the real transport. We must take each
3126 address off the chain first, because post_process_one() puts it on another
3129 for (addr2 = addr; addr2; addr2 = nextaddr)
3131 int result = addr2->transport_return;
3132 nextaddr = addr2->next;
3134 DEBUG(D_deliver|D_transport)
3135 debug_printf("%s transport returned %s for %s\n",
3137 result == OK ? "OK" :
3138 result == DEFER ? "DEFER" :
3139 result == FAIL ? "FAIL" :
3140 result == PANIC ? "PANIC" : "?",
3143 /* If there is a retry_record, or if delivery is deferred, build a retry
3144 item for setting a new retry time or deleting the old retry record from
3145 the database. These items are handled all together after all addresses
3146 have been handled (so the database is open just for a short time for
3149 if (result == DEFER || testflag(addr2, af_lt_retry_exists))
3151 int flags = result == DEFER ? 0 : rf_delete;
3152 uschar *retry_key = string_copy(tp->retry_use_local_part
3153 ? addr2->address_retry_key : addr2->domain_retry_key);
3155 retry_add_item(addr2, retry_key, flags);
3158 /* Done with this address */
3162 addr2->more_errno = deliver_time.tv_sec;
3163 addr2->delivery_usec = deliver_time.tv_usec;
3165 post_process_one(addr2, result, logflags, EXIM_DTYPE_TRANSPORT, logchar);
3167 /* If a pipe delivery generated text to be sent back, the result may be
3168 changed to FAIL, and we must copy this for subsequent addresses in the
3171 if (addr2->transport_return != result)
3173 for (addr3 = nextaddr; addr3; addr3 = addr3->next)
3175 addr3->transport_return = addr2->transport_return;
3176 addr3->basic_errno = addr2->basic_errno;
3177 addr3->message = addr2->message;
3179 result = addr2->transport_return;
3182 /* Whether or not the result was changed to FAIL, we need to copy the
3183 return_file value from the first address into all the addresses of the
3184 batch, so they are all listed in the error message. */
3186 addr2->return_file = addr->return_file;
3188 /* Change log character for recording successful deliveries. */
3190 if (result == OK) logchar = '-';
3192 } /* Loop back for next batch of addresses */
3198 /*************************************************
3199 * Sort remote deliveries *
3200 *************************************************/
3202 /* This function is called if remote_sort_domains is set. It arranges that the
3203 chain of addresses for remote deliveries is ordered according to the strings
3204 specified. Try to make this shuffling reasonably efficient by handling
3205 sequences of addresses rather than just single ones.
3212 sort_remote_deliveries(void)
3215 address_item **aptr = &addr_remote;
3216 const uschar *listptr = remote_sort_domains;
3221 && (pattern = string_nextinlist(&listptr, &sep, patbuf, sizeof(patbuf)))
3224 address_item *moved = NULL;
3225 address_item **bptr = &moved;
3229 address_item **next;
3230 deliver_domain = (*aptr)->domain; /* set $domain */
3231 if (match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1,
3232 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK)
3234 aptr = &(*aptr)->next;
3238 next = &(*aptr)->next;
3240 && (deliver_domain = (*next)->domain, /* Set $domain */
3241 match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1,
3242 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL)) != OK
3244 next = &(*next)->next;
3246 /* If the batch of non-matchers is at the end, add on any that were
3247 extracted further up the chain, and end this iteration. Otherwise,
3248 extract them from the chain and hang on the moved chain. */
3260 aptr = &(*aptr)->next;
3263 /* If the loop ended because the final address matched, *aptr will
3264 be NULL. Add on to the end any extracted non-matching addresses. If
3265 *aptr is not NULL, the loop ended via "break" when *next is null, that
3266 is, there was a string of non-matching addresses at the end. In this
3267 case the extracted addresses have already been added on the end. */
3269 if (!*aptr) *aptr = moved;
3275 debug_printf("remote addresses after sorting:\n");
3276 for (addr = addr_remote; addr; addr = addr->next)
3277 debug_printf(" %s\n", addr->address);
3283 /*************************************************
3284 * Read from pipe for remote delivery subprocess *
3285 *************************************************/
3287 /* This function is called when the subprocess is complete, but can also be
3288 called before it is complete, in order to empty a pipe that is full (to prevent
3289 deadlock). It must therefore keep track of its progress in the parlist data
3292 We read the pipe to get the delivery status codes and a possible error message
3293 for each address, optionally preceded by unusability data for the hosts and
3294 also by optional retry data.
3296 Read in large chunks into the big buffer and then scan through, interpreting
3297 the data therein. In most cases, only a single read will be necessary. No
3298 individual item will ever be anywhere near 2500 bytes in length, so by ensuring
3299 that we read the next chunk when there is less than 2500 bytes left in the
3300 non-final chunk, we can assume each item is complete in the buffer before
3301 handling it. Each item is written using a single write(), which is atomic for
3302 small items (less than PIPE_BUF, which seems to be at least 512 in any Unix and
3303 often bigger) so even if we are reading while the subprocess is still going, we
3304 should never have only a partial item in the buffer.
3306 hs12: This assumption is not true anymore, since we got quit large items (certificate
3307 information and such)
3310 poffset the offset of the parlist item
3311 eop TRUE if the process has completed
3313 Returns: TRUE if the terminating 'Z' item has been read,
3314 or there has been a disaster (i.e. no more data needed);
3319 par_read_pipe(int poffset, BOOL eop)
3322 pardata *p = parlist + poffset;
3323 address_item *addrlist = p->addrlist;
3324 address_item *addr = p->addr;
3328 uschar *msg = p->msg;
3329 BOOL done = p->done;
3331 /* Loop through all items, reading from the pipe when necessary. The pipe
3332 used to be non-blocking. But I do not see a reason for using non-blocking I/O
3333 here, as the preceding select() tells us, if data is available for reading.
3335 A read() on a "selected" handle should never block, but(!) it may return
3336 less data then we expected. (The buffer size we pass to read() shouldn't be
3337 understood as a "request", but as a "limit".)
3339 Each separate item is written to the pipe in a timely manner. But, especially for
3340 larger items, the read(2) may already return partial data from the write(2).
3342 The write is atomic mostly (depending on the amount written), but atomic does
3343 not imply "all or noting", it just is "not intermixed" with other writes on the
3344 same channel (pipe).
3348 DEBUG(D_deliver) debug_printf("reading pipe for subprocess %d (%s)\n",
3349 (int)p->pid, eop? "ended" : "not ended yet");
3353 retry_item *r, **rp;
3354 uschar pipeheader[PIPE_HEADER_SIZE+1];
3355 uschar *id = &pipeheader[0];
3356 uschar *subid = &pipeheader[1];
3357 uschar *ptr = big_buffer;
3358 size_t required = PIPE_HEADER_SIZE; /* first the pipehaeder, later the data */
3361 DEBUG(D_deliver) debug_printf(
3362 "expect %lu bytes (pipeheader) from tpt process %d\n", (u_long)required, pid);
3364 /* We require(!) all the PIPE_HEADER_SIZE bytes here, as we know,
3365 they're written in a timely manner, so waiting for the write shouldn't hurt a lot.
3366 If we get less, we can assume the subprocess do be done and do not expect any further
3367 information from it. */
3369 if ((got = readn(fd, pipeheader, required)) != required)
3371 msg = string_sprintf("got " SSIZE_T_FMT " of %d bytes (pipeheader) "
3372 "from transport process %d for transport %s",
3373 got, PIPE_HEADER_SIZE, pid, addr->transport->driver_name);
3378 pipeheader[PIPE_HEADER_SIZE] = '\0';
3380 debug_printf("got %ld bytes (pipeheader) from transport process %d\n",
3384 /* If we can't decode the pipeheader, the subprocess seems to have a
3385 problem, we do not expect any furher information from it. */
3387 required = Ustrtol(pipeheader+2, &endc, 10);
3390 msg = string_sprintf("failed to read pipe "
3391 "from transport process %d for transport %s: error decoding size from header",
3392 pid, addr->transport->driver_name);
3399 debug_printf("expect %lu bytes (pipedata) from transport process %d\n",
3400 (u_long)required, pid);
3402 /* Same as above, the transport process will write the bytes announced
3403 in a timely manner, so we can just wait for the bytes, getting less than expected
3404 is considered a problem of the subprocess, we do not expect anything else from it. */
3405 if ((got = readn(fd, big_buffer, required)) != required)
3407 msg = string_sprintf("got only " SSIZE_T_FMT " of " SIZE_T_FMT
3408 " bytes (pipedata) from transport process %d for transport %s",
3409 got, required, pid, addr->transport->driver_name);
3414 /* Handle each possible type of item, assuming the complete item is
3415 available in store. */
3419 /* Host items exist only if any hosts were marked unusable. Match
3420 up by checking the IP address. */
3423 for (h = addrlist->host_list; h; h = h->next)
3425 if (!h->address || Ustrcmp(h->address, ptr+2) != 0) continue;
3433 /* Retry items are sent in a preceding R item for each address. This is
3434 kept separate to keep each message short enough to guarantee it won't
3435 be split in the pipe. Hopefully, in the majority of cases, there won't in
3436 fact be any retry items at all.
3438 The complete set of retry items might include an item to delete a
3439 routing retry if there was a previous routing delay. However, routing
3440 retries are also used when a remote transport identifies an address error.
3441 In that case, there may also be an "add" item for the same key. Arrange
3442 that a "delete" item is dropped in favour of an "add" item. */
3445 if (!addr) goto ADDR_MISMATCH;
3447 DEBUG(D_deliver|D_retry)
3448 debug_printf("reading retry information for %s from subprocess\n",
3451 /* Cut out any "delete" items on the list. */
3453 for (rp = &addr->retries; (r = *rp); rp = &r->next)
3454 if (Ustrcmp(r->key, ptr+1) == 0) /* Found item with same key */
3456 if (!(r->flags & rf_delete)) break; /* It was not "delete" */
3457 *rp = r->next; /* Excise a delete item */
3458 DEBUG(D_deliver|D_retry)
3459 debug_printf(" existing delete item dropped\n");
3462 /* We want to add a delete item only if there is no non-delete item;
3463 however we still have to step ptr through the data. */
3465 if (!r || !(*ptr & rf_delete))
3467 r = store_get(sizeof(retry_item));
3468 r->next = addr->retries;
3471 r->key = string_copy(ptr);
3473 memcpy(&r->basic_errno, ptr, sizeof(r->basic_errno));
3474 ptr += sizeof(r->basic_errno);
3475 memcpy(&r->more_errno, ptr, sizeof(r->more_errno));
3476 ptr += sizeof(r->more_errno);
3477 r->message = *ptr ? string_copy(ptr) : NULL;
3478 DEBUG(D_deliver|D_retry) debug_printf(" added %s item\n",
3479 r->flags & rf_delete ? "delete" : "retry");
3484 DEBUG(D_deliver|D_retry)
3485 debug_printf(" delete item not added: non-delete item exists\n");
3488 ptr += sizeof(r->basic_errno) + sizeof(r->more_errno);
3494 /* Put the amount of data written into the parlist block */
3497 memcpy(&(p->transport_count), ptr, sizeof(transport_count));
3498 ptr += sizeof(transport_count);
3501 /* Address items are in the order of items on the address chain. We
3502 remember the current address value in case this function is called
3503 several times to empty the pipe in stages. Information about delivery
3504 over TLS is sent in a preceding X item for each address. We don't put
3505 it in with the other info, in order to keep each message short enough to
3506 guarantee it won't be split in the pipe. */
3510 if (!addr) goto ADDR_MISMATCH; /* Below, in 'A' handler */
3514 addr->cipher = NULL;
3515 addr->peerdn = NULL;
3518 addr->cipher = string_copy(ptr);
3521 addr->peerdn = string_copy(ptr);
3526 (void) tls_import_cert(ptr, &addr->peercert);
3528 addr->peercert = NULL;
3533 (void) tls_import_cert(ptr, &addr->ourcert);
3535 addr->ourcert = NULL;
3538 # ifndef DISABLE_OCSP
3540 addr->ocsp = *ptr ? *ptr - '0' : OCSP_NOT_REQ;
3546 #endif /*SUPPORT_TLS*/
3548 case 'C': /* client authenticator information */
3551 case '1': addr->authenticator = *ptr ? string_copy(ptr) : NULL; break;
3552 case '2': addr->auth_id = *ptr ? string_copy(ptr) : NULL; break;
3553 case '3': addr->auth_sndr = *ptr ? string_copy(ptr) : NULL; break;
3558 #ifndef DISABLE_PRDR
3560 setflag(addr, af_prdr_used);
3567 case 1: setflag(addr, af_pipelining); break;
3572 setflag(addr, af_chunking_used);
3576 setflag(addr, af_tcp_fastopen_conn);
3577 if (*subid > '0') setflag(addr, af_tcp_fastopen);
3581 if (!addr) goto ADDR_MISMATCH;
3582 memcpy(&(addr->dsn_aware), ptr, sizeof(addr->dsn_aware));
3583 ptr += sizeof(addr->dsn_aware);
3584 DEBUG(D_deliver) debug_printf("DSN read: addr->dsn_aware = %d\n", addr->dsn_aware);
3591 msg = string_sprintf("address count mismatch for data read from pipe "
3592 "for transport process %d for transport %s", pid,
3593 addrlist->transport->driver_name);
3600 #ifdef SUPPORT_SOCKS
3601 case '2': /* proxy information; must arrive before A0 and applies to that addr XXX oops*/
3602 proxy_session = TRUE; /*XXX should this be cleared somewhere? */
3607 proxy_local_address = string_copy(ptr);
3609 memcpy(&proxy_local_port, ptr, sizeof(proxy_local_port));
3610 ptr += sizeof(proxy_local_port);
3615 #ifdef EXPERIMENTAL_DSN_INFO
3616 case '1': /* must arrive before A0, and applies to that addr */
3617 /* Two strings: smtp_greeting and helo_response */
3618 addr->smtp_greeting = string_copy(ptr);
3620 addr->helo_response = string_copy(ptr);
3626 DEBUG(D_deliver) debug_printf("A0 %s tret %d\n", addr->address, *ptr);
3627 addr->transport_return = *ptr++;
3628 addr->special_action = *ptr++;
3629 memcpy(&addr->basic_errno, ptr, sizeof(addr->basic_errno));
3630 ptr += sizeof(addr->basic_errno);
3631 memcpy(&addr->more_errno, ptr, sizeof(addr->more_errno));
3632 ptr += sizeof(addr->more_errno);
3633 memcpy(&addr->delivery_usec, ptr, sizeof(addr->delivery_usec));
3634 ptr += sizeof(addr->delivery_usec);
3635 memcpy(&addr->flags, ptr, sizeof(addr->flags));
3636 ptr += sizeof(addr->flags);
3637 addr->message = *ptr ? string_copy(ptr) : NULL;
3639 addr->user_message = *ptr ? string_copy(ptr) : NULL;
3642 /* Always two strings for host information, followed by the port number and DNSSEC mark */
3646 h = store_get(sizeof(host_item));
3647 h->name = string_copy(ptr);
3649 h->address = string_copy(ptr);
3651 memcpy(&h->port, ptr, sizeof(h->port));
3652 ptr += sizeof(h->port);
3653 h->dnssec = *ptr == '2' ? DS_YES
3654 : *ptr == '1' ? DS_NO
3657 addr->host_used = h;
3661 /* Finished with this address */
3668 /* Local interface address/port */
3670 if (*ptr) sending_ip_address = string_copy(ptr);
3672 if (*ptr) sending_port = atoi(CS ptr);
3676 /* Z marks the logical end of the data. It is followed by '0' if
3677 continue_transport was NULL at the end of transporting, otherwise '1'.
3678 We need to know when it becomes NULL during a delivery down a passed SMTP
3679 channel so that we don't try to pass anything more down it. Of course, for
3680 most normal messages it will remain NULL all the time. */
3685 continue_transport = NULL;
3686 continue_hostname = NULL;
3689 DEBUG(D_deliver) debug_printf("Z0%c item read\n", *ptr);
3692 /* Anything else is a disaster. */
3695 msg = string_sprintf("malformed data (%d) read from pipe for transport "
3696 "process %d for transport %s", ptr[-1], pid,
3697 addr->transport->driver_name);
3703 /* The done flag is inspected externally, to determine whether or not to
3704 call the function again when the process finishes. */
3708 /* If the process hadn't finished, and we haven't seen the end of the data
3709 or if we suffered a disaster, update the rest of the state, and return FALSE to
3710 indicate "not finished". */
3719 /* Close our end of the pipe, to prevent deadlock if the far end is still
3720 pushing stuff into it. */
3725 /* If we have finished without error, but haven't had data for every address,
3726 something is wrong. */
3729 msg = string_sprintf("insufficient address data read from pipe "
3730 "for transport process %d for transport %s", pid,
3731 addr->transport->driver_name);
3733 /* If an error message is set, something has gone wrong in getting back
3734 the delivery data. Put the message into each address and freeze it. */
3737 for (addr = addrlist; addr; addr = addr->next)
3739 addr->transport_return = DEFER;
3740 addr->special_action = SPECIAL_FREEZE;
3741 addr->message = msg;
3742 log_write(0, LOG_MAIN|LOG_PANIC, "Delivery status for %s: %s\n", addr->address, addr->message);
3745 /* Return TRUE to indicate we have got all we need from this process, even
3746 if it hasn't actually finished yet. */
3753 /*************************************************
3754 * Post-process a set of remote addresses *
3755 *************************************************/
3757 /* Do what has to be done immediately after a remote delivery for each set of
3758 addresses, then re-write the spool if necessary. Note that post_process_one
3759 puts the address on an appropriate queue; hence we must fish off the next
3760 one first. This function is also called if there is a problem with setting
3761 up a subprocess to do a remote delivery in parallel. In this case, the final
3762 argument contains a message, and the action must be forced to DEFER.
3765 addr pointer to chain of address items
3766 logflags flags for logging
3767 msg NULL for normal cases; -> error message for unexpected problems
3768 fallback TRUE if processing fallback hosts
3774 remote_post_process(address_item *addr, int logflags, uschar *msg,
3779 /* If any host addresses were found to be unusable, add them to the unusable
3780 tree so that subsequent deliveries don't try them. */
3782 for (h = addr->host_list; h; h = h->next)
3784 if (h->status >= hstatus_unusable) tree_add_unusable(h);
3786 /* Now handle each address on the chain. The transport has placed '=' or '-'
3787 into the special_action field for each successful delivery. */
3791 address_item *next = addr->next;
3793 /* If msg == NULL (normal processing) and the result is DEFER and we are
3794 processing the main hosts and there are fallback hosts available, put the
3795 address on the list for fallback delivery. */
3797 if ( addr->transport_return == DEFER
3798 && addr->fallback_hosts
3803 addr->host_list = addr->fallback_hosts;
3804 addr->next = addr_fallback;
3805 addr_fallback = addr;
3806 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", addr->address);
3809 /* If msg is set (=> unexpected problem), set it in the address before
3810 doing the ordinary post processing. */
3816 addr->message = msg;
3817 addr->transport_return = DEFER;
3819 (void)post_process_one(addr, addr->transport_return, logflags,
3820 EXIM_DTYPE_TRANSPORT, addr->special_action);
3828 /* If we have just delivered down a passed SMTP channel, and that was
3829 the last address, the channel will have been closed down. Now that
3830 we have logged that delivery, set continue_sequence to 1 so that
3831 any subsequent deliveries don't get "*" incorrectly logged. */
3833 if (!continue_transport) continue_sequence = 1;
3838 /*************************************************
3839 * Wait for one remote delivery subprocess *
3840 *************************************************/
3842 /* This function is called while doing remote deliveries when either the
3843 maximum number of processes exist and we need one to complete so that another
3844 can be created, or when waiting for the last ones to complete. It must wait for
3845 the completion of one subprocess, empty the control block slot, and return a
3846 pointer to the address chain.
3849 Returns: pointer to the chain of addresses handled by the process;
3850 NULL if no subprocess found - this is an unexpected error
3853 static address_item *
3856 int poffset, status;
3857 address_item *addr, *addrlist;
3860 set_process_info("delivering %s: waiting for a remote delivery subprocess "
3861 "to finish", message_id);
3863 /* Loop until either a subprocess completes, or there are no subprocesses in
3864 existence - in which case give an error return. We cannot proceed just by
3865 waiting for a completion, because a subprocess may have filled up its pipe, and
3866 be waiting for it to be emptied. Therefore, if no processes have finished, we
3867 wait for one of the pipes to acquire some data by calling select(), with a
3868 timeout just in case.
3870 The simple approach is just to iterate after reading data from a ready pipe.
3871 This leads to non-ideal behaviour when the subprocess has written its final Z
3872 item, closed the pipe, and is in the process of exiting (the common case). A
3873 call to waitpid() yields nothing completed, but select() shows the pipe ready -
3874 reading it yields EOF, so you end up with busy-waiting until the subprocess has
3877 To avoid this, if all the data that is needed has been read from a subprocess
3878 after select(), an explicit wait() for it is done. We know that all it is doing
3879 is writing to the pipe and then exiting, so the wait should not be long.
3881 The non-blocking waitpid() is to some extent just insurance; if we could
3882 reliably detect end-of-file on the pipe, we could always know when to do a
3883 blocking wait() for a completed process. However, because some systems use
3884 NDELAY, which doesn't distinguish between EOF and pipe empty, it is easier to
3885 use code that functions without the need to recognize EOF.
3887 There's a double loop here just in case we end up with a process that is not in
3888 the list of remote delivery processes. Something has obviously gone wrong if
3889 this is the case. (For example, a process that is incorrectly left over from
3890 routing or local deliveries might be found.) The damage can be minimized by
3891 looping back and looking for another process. If there aren't any, the error
3892 return will happen. */
3894 for (;;) /* Normally we do not repeat this loop */
3896 while ((pid = waitpid(-1, &status, WNOHANG)) <= 0)
3899 fd_set select_pipes;
3900 int maxpipe, readycount;
3902 /* A return value of -1 can mean several things. If errno != ECHILD, it
3903 either means invalid options (which we discount), or that this process was
3904 interrupted by a signal. Just loop to try the waitpid() again.
3906 If errno == ECHILD, waitpid() is telling us that there are no subprocesses
3907 in existence. This should never happen, and is an unexpected error.
3908 However, there is a nasty complication when running under Linux. If "strace
3909 -f" is being used under Linux to trace this process and its children,
3910 subprocesses are "stolen" from their parents and become the children of the
3911 tracing process. A general wait such as the one we've just obeyed returns
3912 as if there are no children while subprocesses are running. Once a
3913 subprocess completes, it is restored to the parent, and waitpid(-1) finds
3914 it. Thanks to Joachim Wieland for finding all this out and suggesting a
3917 This does not happen using "truss" on Solaris, nor (I think) with other
3918 tracing facilities on other OS. It seems to be specific to Linux.
3920 What we do to get round this is to use kill() to see if any of our
3921 subprocesses are still in existence. If kill() gives an OK return, we know
3922 it must be for one of our processes - it can't be for a re-use of the pid,
3923 because if our process had finished, waitpid() would have found it. If any
3924 of our subprocesses are in existence, we proceed to use select() as if
3925 waitpid() had returned zero. I think this is safe. */
3929 if (errno != ECHILD) continue; /* Repeats the waitpid() */
3932 debug_printf("waitpid() returned -1/ECHILD: checking explicitly "
3933 "for process existence\n");
3935 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3937 if ((pid = parlist[poffset].pid) != 0 && kill(pid, 0) == 0)
3939 DEBUG(D_deliver) debug_printf("process %d still exists: assume "
3940 "stolen by strace\n", (int)pid);
3941 break; /* With poffset set */
3945 if (poffset >= remote_max_parallel)
3947 DEBUG(D_deliver) debug_printf("*** no delivery children found\n");
3948 return NULL; /* This is the error return */
3952 /* A pid value greater than 0 breaks the "while" loop. A negative value has
3953 been handled above. A return value of zero means that there is at least one
3954 subprocess, but there are no completed subprocesses. See if any pipes are
3955 ready with any data for reading. */
3957 DEBUG(D_deliver) debug_printf("selecting on subprocess pipes\n");
3960 FD_ZERO(&select_pipes);
3961 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3962 if (parlist[poffset].pid != 0)
3964 int fd = parlist[poffset].fd;
3965 FD_SET(fd, &select_pipes);
3966 if (fd > maxpipe) maxpipe = fd;
3969 /* Stick in a 60-second timeout, just in case. */
3974 readycount = select(maxpipe + 1, (SELECT_ARG2_TYPE *)&select_pipes,
3977 /* Scan through the pipes and read any that are ready; use the count
3978 returned by select() to stop when there are no more. Select() can return
3979 with no processes (e.g. if interrupted). This shouldn't matter.
3981 If par_read_pipe() returns TRUE, it means that either the terminating Z was
3982 read, or there was a disaster. In either case, we are finished with this
3983 process. Do an explicit wait() for the process and break the main loop if
3986 It turns out that we have to deal with the case of an interrupted system
3987 call, which can happen on some operating systems if the signal handling is
3988 set up to do that by default. */
3991 readycount > 0 && poffset < remote_max_parallel;
3994 if ( (pid = parlist[poffset].pid) != 0
3995 && FD_ISSET(parlist[poffset].fd, &select_pipes)
3999 if (par_read_pipe(poffset, FALSE)) /* Finished with this pipe */
4000 for (;;) /* Loop for signals */
4002 pid_t endedpid = waitpid(pid, &status, 0);
4003 if (endedpid == pid) goto PROCESS_DONE;
4004 if (endedpid != (pid_t)(-1) || errno != EINTR)
4005 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Unexpected error return "
4006 "%d (errno = %d) from waitpid() for process %d",
4007 (int)endedpid, errno, (int)pid);
4012 /* Now go back and look for a completed subprocess again. */
4015 /* A completed process was detected by the non-blocking waitpid(). Find the
4016 data block that corresponds to this subprocess. */
4018 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4019 if (pid == parlist[poffset].pid) break;
4021 /* Found the data block; this is a known remote delivery process. We don't
4022 need to repeat the outer loop. This should be what normally happens. */
4024 if (poffset < remote_max_parallel) break;
4026 /* This situation is an error, but it's probably better to carry on looking
4027 for another process than to give up (as we used to do). */
4029 log_write(0, LOG_MAIN|LOG_PANIC, "Process %d finished: not found in remote "
4030 "transport process list", pid);
4031 } /* End of the "for" loop */
4033 /* Come here when all the data was completely read after a select(), and
4034 the process in pid has been wait()ed for. */
4041 debug_printf("remote delivery process %d ended\n", (int)pid);
4043 debug_printf("remote delivery process %d ended: status=%04x\n", (int)pid,
4047 set_process_info("delivering %s", message_id);
4049 /* Get the chain of processed addresses */
4051 addrlist = parlist[poffset].addrlist;
4053 /* If the process did not finish cleanly, record an error and freeze (except
4054 for SIGTERM, SIGKILL and SIGQUIT), and also ensure the journal is not removed,
4055 in case the delivery did actually happen. */
4057 if ((status & 0xffff) != 0)
4060 int msb = (status >> 8) & 255;
4061 int lsb = status & 255;
4062 int code = (msb == 0)? (lsb & 0x7f) : msb;
4064 msg = string_sprintf("%s transport process returned non-zero status 0x%04x: "
4066 addrlist->transport->driver_name,
4068 (msb == 0)? "terminated by signal" : "exit code",
4071 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
4072 addrlist->special_action = SPECIAL_FREEZE;
4074 for (addr = addrlist; addr; addr = addr->next)
4076 addr->transport_return = DEFER;
4077 addr->message = msg;
4080 remove_journal = FALSE;
4083 /* Else complete reading the pipe to get the result of the delivery, if all
4084 the data has not yet been obtained. */
4086 else if (!parlist[poffset].done) (void)par_read_pipe(poffset, TRUE);
4088 /* Put the data count and return path into globals, mark the data slot unused,
4089 decrement the count of subprocesses, and return the address chain. */
4091 transport_count = parlist[poffset].transport_count;
4092 used_return_path = parlist[poffset].return_path;
4093 parlist[poffset].pid = 0;
4100 /*************************************************
4101 * Wait for subprocesses and post-process *
4102 *************************************************/
4104 /* This function waits for subprocesses until the number that are still running
4105 is below a given threshold. For each complete subprocess, the addresses are
4106 post-processed. If we can't find a running process, there is some shambles.
4107 Better not bomb out, as that might lead to multiple copies of the message. Just
4108 log and proceed as if all done.
4111 max maximum number of subprocesses to leave running
4112 fallback TRUE if processing fallback hosts
4118 par_reduce(int max, BOOL fallback)
4120 while (parcount > max)
4122 address_item *doneaddr = par_wait();
4125 log_write(0, LOG_MAIN|LOG_PANIC,
4126 "remote delivery process count got out of step");
4131 transport_instance * tp = doneaddr->transport;
4132 if (tp->max_parallel)
4133 enq_end(string_sprintf("tpt-serialize-%s", tp->name));
4135 remote_post_process(doneaddr, LOG_MAIN, NULL, fallback);
4141 rmt_dlv_checked_write(int fd, char id, char subid, void * buf, ssize_t size)
4143 uschar pipe_header[PIPE_HEADER_SIZE+1];
4144 size_t total_len = PIPE_HEADER_SIZE + size;
4146 struct iovec iov[2] = {
4147 { pipe_header, PIPE_HEADER_SIZE }, /* indication about the data to expect */
4148 { buf, size } /* *the* data */
4153 /* we assume that size can't get larger then BIG_BUFFER_SIZE which currently is set to 16k */
4154 /* complain to log if someone tries with buffer sizes we can't handle*/
4156 if (size > BIG_BUFFER_SIZE-1)
4158 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4159 "Failed writing transport result to pipe: can't handle buffers > %d bytes. truncating!\n",
4161 size = BIG_BUFFER_SIZE;
4164 /* Should we check that we do not write more than PIPE_BUF? What would
4167 /* convert size to human readable string prepended by id and subid */
4168 if (PIPE_HEADER_SIZE != snprintf(CS pipe_header, PIPE_HEADER_SIZE+1, "%c%c%05ld",
4169 id, subid, (long)size))
4170 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "header snprintf failed\n");
4172 DEBUG(D_deliver) debug_printf("header write id:%c,subid:%c,size:%ld,final:%s\n",
4173 id, subid, (long)size, pipe_header);
4175 if ((ret = writev(fd, iov, 2)) != total_len)
4176 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4177 "Failed writing transport result to pipe (%ld of %ld bytes): %s",
4178 (long)ret, (long)total_len, ret == -1 ? strerror(errno) : "short write");
4181 /*************************************************
4182 * Do remote deliveries *
4183 *************************************************/
4185 /* This function is called to process the addresses in addr_remote. We must
4186 pick off the queue all addresses that have the same transport, remote
4187 destination, and errors address, and hand them to the transport in one go,
4188 subject to some configured limitations. If this is a run to continue delivering
4189 to an existing delivery channel, skip all but those addresses that can go to
4190 that channel. The skipped addresses just get deferred.
4192 If mua_wrapper is set, all addresses must be able to be sent in a single
4193 transaction. If not, this function yields FALSE.
4195 In Exim 4, remote deliveries are always done in separate processes, even
4196 if remote_max_parallel = 1 or if there's only one delivery to do. The reason
4197 is so that the base process can retain privilege. This makes the
4198 implementation of fallback transports feasible (though not initially done.)
4200 We create up to the configured number of subprocesses, each of which passes
4201 back the delivery state via a pipe. (However, when sending down an existing
4202 connection, remote_max_parallel is forced to 1.)
4205 fallback TRUE if processing fallback hosts
4207 Returns: TRUE normally
4208 FALSE if mua_wrapper is set and the addresses cannot all be sent
4213 do_remote_deliveries(BOOL fallback)
4219 parcount = 0; /* Number of executing subprocesses */
4221 /* When sending down an existing channel, only do one delivery at a time.
4222 We use a local variable (parmax) to hold the maximum number of processes;
4223 this gets reduced from remote_max_parallel if we can't create enough pipes. */
4225 if (continue_transport) remote_max_parallel = 1;
4226 parmax = remote_max_parallel;
4228 /* If the data for keeping a list of processes hasn't yet been
4233 parlist = store_get(remote_max_parallel * sizeof(pardata));
4234 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4235 parlist[poffset].pid = 0;
4238 /* Now loop for each remote delivery */
4240 for (delivery_count = 0; addr_remote; delivery_count++)
4246 int address_count = 1;
4247 int address_count_max;
4249 BOOL use_initgroups;
4250 BOOL pipe_done = FALSE;
4251 transport_instance *tp;
4252 address_item **anchor = &addr_remote;
4253 address_item *addr = addr_remote;
4254 address_item *last = addr;
4257 uschar * serialize_key = NULL;
4259 /* Pull the first address right off the list. */
4261 addr_remote = addr->next;
4264 DEBUG(D_deliver|D_transport)
4265 debug_printf("--------> %s <--------\n", addr->address);
4267 /* If no transport has been set, there has been a big screw-up somewhere. */
4269 if (!(tp = addr->transport))
4271 f.disable_logging = FALSE; /* Jic */
4272 panicmsg = US"No transport set by router";
4273 goto panic_continue;
4276 /* Check that this base address hasn't previously been delivered to this
4277 transport. The check is necessary at this point to handle homonymic addresses
4278 correctly in cases where the pattern of redirection changes between delivery
4279 attempts. Non-homonymic previous delivery is detected earlier, at routing
4282 if (previously_transported(addr, FALSE)) continue;
4284 /* Force failure if the message is too big. */
4286 if (tp->message_size_limit)
4288 int rc = check_message_size(tp, addr);
4291 addr->transport_return = rc;
4292 remote_post_process(addr, LOG_MAIN, NULL, fallback);
4297 /* Get the flag which specifies whether the transport can handle different
4298 domains that nevertheless resolve to the same set of hosts. If it needs
4299 expanding, get variables set: $address_data, $domain_data, $localpart_data,
4300 $host, $host_address, $host_port. */
4301 if (tp->expand_multi_domain)
4302 deliver_set_expansions(addr);
4304 if (exp_bool(addr, US"transport", tp->name, D_transport,
4305 US"multi_domain", tp->multi_domain, tp->expand_multi_domain,
4306 &multi_domain) != OK)
4308 deliver_set_expansions(NULL);
4309 panicmsg = addr->message;
4310 goto panic_continue;
4313 /* Get the maximum it can handle in one envelope, with zero meaning
4314 unlimited, which is forced for the MUA wrapper case. */
4316 address_count_max = tp->max_addresses;
4317 if (address_count_max == 0 || mua_wrapper) address_count_max = 999999;
4320 /************************************************************************/
4321 /***** This is slightly experimental code, but should be safe. *****/
4323 /* The address_count_max value is the maximum number of addresses that the
4324 transport can send in one envelope. However, the transport must be capable of
4325 dealing with any number of addresses. If the number it gets exceeds its
4326 envelope limitation, it must send multiple copies of the message. This can be
4327 done over a single connection for SMTP, so uses less resources than making
4328 multiple connections. On the other hand, if remote_max_parallel is greater
4329 than one, it is perhaps a good idea to use parallel processing to move the
4330 message faster, even if that results in multiple simultaneous connections to
4333 How can we come to some compromise between these two ideals? What we do is to
4334 limit the number of addresses passed to a single instance of a transport to
4335 the greater of (a) its address limit (rcpt_max for SMTP) and (b) the total
4336 number of addresses routed to remote transports divided by
4337 remote_max_parallel. For example, if the message has 100 remote recipients,
4338 remote max parallel is 2, and rcpt_max is 10, we'd never send more than 50 at
4339 once. But if rcpt_max is 100, we could send up to 100.
4341 Of course, not all the remotely addresses in a message are going to go to the
4342 same set of hosts (except in smarthost configurations), so this is just a
4343 heuristic way of dividing up the work.
4345 Furthermore (1), because this may not be wanted in some cases, and also to
4346 cope with really pathological cases, there is also a limit to the number of
4347 messages that are sent over one connection. This is the same limit that is
4348 used when sending several different messages over the same connection.
4349 Continue_sequence is set when in this situation, to the number sent so
4350 far, including this message.
4352 Furthermore (2), when somebody explicitly sets the maximum value to 1, it
4353 is probably because they are using VERP, in which case they want to pass only
4354 one address at a time to the transport, in order to be able to use
4355 $local_part and $domain in constructing a new return path. We could test for
4356 the use of these variables, but as it is so likely they will be used when the
4357 maximum is 1, we don't bother. Just leave the value alone. */
4359 if ( address_count_max != 1
4360 && address_count_max < remote_delivery_count/remote_max_parallel
4363 int new_max = remote_delivery_count/remote_max_parallel;
4364 int message_max = tp->connection_max_messages;
4365 if (connection_max_messages >= 0) message_max = connection_max_messages;
4366 message_max -= continue_sequence - 1;
4367 if (message_max > 0 && new_max > address_count_max * message_max)
4368 new_max = address_count_max * message_max;
4369 address_count_max = new_max;
4372 /************************************************************************/
4375 /* Pick off all addresses which have the same transport, errors address,
4376 destination, and extra headers. In some cases they point to the same host
4377 list, but we also need to check for identical host lists generated from
4378 entirely different domains. The host list pointers can be NULL in the case
4379 where the hosts are defined in the transport. There is also a configured
4380 maximum limit of addresses that can be handled at once (see comments above
4381 for how it is computed).
4382 If the transport does not handle multiple domains, enforce that also,
4383 and if it might need a per-address check for this, re-evaluate it.
4386 while ((next = *anchor) && address_count < address_count_max)
4389 if ( (multi_domain || Ustrcmp(next->domain, addr->domain) == 0)
4390 && tp == next->transport
4391 && same_hosts(next->host_list, addr->host_list)
4392 && same_strings(next->prop.errors_address, addr->prop.errors_address)
4393 && same_headers(next->prop.extra_headers, addr->prop.extra_headers)
4394 && same_ugid(tp, next, addr)
4395 && ( next->prop.remove_headers == addr->prop.remove_headers
4396 || ( next->prop.remove_headers
4397 && addr->prop.remove_headers
4398 && Ustrcmp(next->prop.remove_headers, addr->prop.remove_headers) == 0
4402 (void)(!tp->expand_multi_domain || ((void)deliver_set_expansions(next), 1)),
4404 US"transport", next->transport->name, D_transport,
4405 US"multi_domain", next->transport->multi_domain,
4406 next->transport->expand_multi_domain, &md) == OK
4411 *anchor = next->next;
4413 next->first = addr; /* remember top one (for retry processing) */
4418 else anchor = &(next->next);
4419 deliver_set_expansions(NULL);
4422 /* If we are acting as an MUA wrapper, all addresses must go in a single
4423 transaction. If not, put them back on the chain and yield FALSE. */
4425 if (mua_wrapper && addr_remote)
4427 last->next = addr_remote;
4432 /* If the transport is limited for parallellism, enforce that here.
4433 The hints DB entry is decremented in par_reduce(), when we reap the
4434 transport process. */
4436 if (tpt_parallel_check(tp, addr, &serialize_key))
4437 if ((panicmsg = expand_string_message))
4438 goto panic_continue;
4440 continue; /* Loop for the next set of addresses. */
4442 /* Set up the expansion variables for this set of addresses */
4444 deliver_set_expansions(addr);
4446 /* Ensure any transport-set auth info is fresh */
4447 addr->authenticator = addr->auth_id = addr->auth_sndr = NULL;
4449 /* Compute the return path, expanding a new one if required. The old one
4450 must be set first, as it might be referred to in the expansion. */
4452 if(addr->prop.errors_address)
4453 return_path = addr->prop.errors_address;
4454 #ifdef EXPERIMENTAL_SRS
4455 else if(addr->prop.srs_sender)
4456 return_path = addr->prop.srs_sender;
4459 return_path = sender_address;
4461 if (tp->return_path)
4463 uschar *new_return_path = expand_string(tp->return_path);
4464 if (new_return_path)
4465 return_path = new_return_path;
4466 else if (!f.expand_string_forcedfail)
4468 panicmsg = string_sprintf("Failed to expand return path \"%s\": %s",
4469 tp->return_path, expand_string_message);
4474 /* Find the uid, gid, and use_initgroups setting for this transport. Failure
4475 logs and sets up error messages, so we just post-process and continue with
4476 the next address. */
4478 if (!findugid(addr, tp, &uid, &gid, &use_initgroups))
4484 /* If this transport has a setup function, call it now so that it gets
4485 run in this process and not in any subprocess. That way, the results of
4486 any setup that are retained by the transport can be reusable. One of the
4487 things the setup does is to set the fallback host lists in the addresses.
4488 That is why it is called at this point, before the continue delivery
4489 processing, because that might use the fallback hosts. */
4492 (void)((tp->setup)(addr->transport, addr, NULL, uid, gid, NULL));
4494 /* If we have a connection still open from a verify stage (lazy-close)
4495 treat it as if it is a continued connection (apart from the counter used
4496 for the log line mark). */
4498 if (cutthrough.cctx.sock >= 0 && cutthrough.callout_hold_only)
4501 debug_printf("lazy-callout-close: have conn still open from verification\n");
4502 continue_transport = cutthrough.transport;
4503 continue_hostname = string_copy(cutthrough.host.name);
4504 continue_host_address = string_copy(cutthrough.host.address);
4505 continue_sequence = 1;
4506 sending_ip_address = cutthrough.snd_ip;
4507 sending_port = cutthrough.snd_port;
4508 smtp_peer_options = cutthrough.peer_options;
4511 /* If this is a run to continue delivery down an already-established
4512 channel, check that this set of addresses matches the transport and
4513 the channel. If it does not, defer the addresses. If a host list exists,
4514 we must check that the continue host is on the list. Otherwise, the
4515 host is set in the transport. */
4517 f.continue_more = FALSE; /* In case got set for the last lot */
4518 if (continue_transport)
4520 BOOL ok = Ustrcmp(continue_transport, tp->name) == 0;
4522 /* If the transport is about to override the host list do not check
4523 it here but take the cost of running the transport process to discover
4524 if the continued_hostname connection is suitable. This is a layering
4525 violation which is unfortunate as it requires we haul in the smtp
4530 smtp_transport_options_block * ob;
4532 if ( !( Ustrcmp(tp->info->driver_name, "smtp") == 0
4533 && (ob = (smtp_transport_options_block *)tp->options_block)
4534 && ob->hosts_override && ob->hosts
4541 for (h = addr->host_list; h; h = h->next)
4542 if (Ustrcmp(h->name, continue_hostname) == 0)
4543 /*XXX should also check port here */
4544 { ok = TRUE; break; }
4548 /* Addresses not suitable; defer or queue for fallback hosts (which
4549 might be the continue host) and skip to next address. */
4553 DEBUG(D_deliver) debug_printf("not suitable for continue_transport (%s)\n",
4554 Ustrcmp(continue_transport, tp->name) != 0
4555 ? string_sprintf("tpt %s vs %s", continue_transport, tp->name)
4556 : string_sprintf("no host matching %s", continue_hostname));
4557 if (serialize_key) enq_end(serialize_key);
4559 if (addr->fallback_hosts && !fallback)
4561 for (next = addr; ; next = next->next)
4563 next->host_list = next->fallback_hosts;
4564 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", next->address);
4565 if (!next->next) break;
4567 next->next = addr_fallback;
4568 addr_fallback = addr;
4573 for (next = addr; ; next = next->next)
4575 DEBUG(D_deliver) debug_printf(" %s to def list\n", next->address);
4576 if (!next->next) break;
4578 next->next = addr_defer;
4585 /* Set a flag indicating whether there are further addresses that list
4586 the continued host. This tells the transport to leave the channel open,
4587 but not to pass it to another delivery process. We'd like to do that
4588 for non-continue_transport cases too but the knowlege of which host is
4589 connected to is too hard to manage. Perhaps we need a finer-grain
4590 interface to the transport. */
4592 for (next = addr_remote; next && !f.continue_more; next = next->next)
4595 for (h = next->host_list; h; h = h->next)
4596 if (Ustrcmp(h->name, continue_hostname) == 0)
4597 { f.continue_more = TRUE; break; }
4601 /* The transports set up the process info themselves as they may connect
4602 to more than one remote machine. They also have to set up the filter
4603 arguments, if required, so that the host name and address are available
4606 transport_filter_argv = NULL;
4608 /* Create the pipe for inter-process communication. If pipe creation
4609 fails, it is probably because the value of remote_max_parallel is so
4610 large that too many file descriptors for pipes have been created. Arrange
4611 to wait for a process to finish, and then try again. If we still can't
4612 create a pipe when all processes have finished, break the retry loop. */
4616 if (pipe(pfd) == 0) pipe_done = TRUE;
4617 else if (parcount > 0) parmax = parcount;
4620 /* We need to make the reading end of the pipe non-blocking. There are
4621 two different options for this. Exim is cunningly (I hope!) coded so
4622 that it can use either of them, though it prefers O_NONBLOCK, which
4623 distinguishes between EOF and no-more-data. */
4625 /* The data appears in a timely manner and we already did a select on
4626 all pipes, so I do not see a reason to use non-blocking IO here
4629 (void)fcntl(pfd[pipe_read], F_SETFL, O_NONBLOCK);
4631 (void)fcntl(pfd[pipe_read], F_SETFL, O_NDELAY);
4635 /* If the maximum number of subprocesses already exist, wait for a process
4636 to finish. If we ran out of file descriptors, parmax will have been reduced
4637 from its initial value of remote_max_parallel. */
4639 par_reduce(parmax - 1, fallback);
4642 /* If we failed to create a pipe and there were no processes to wait
4643 for, we have to give up on this one. Do this outside the above loop
4644 so that we can continue the main loop. */
4648 panicmsg = string_sprintf("unable to create pipe: %s", strerror(errno));
4652 /* Find a free slot in the pardata list. Must do this after the possible
4653 waiting for processes to finish, because a terminating process will free
4656 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4657 if (parlist[poffset].pid == 0)
4660 /* If there isn't one, there has been a horrible disaster. */
4662 if (poffset >= remote_max_parallel)
4664 (void)close(pfd[pipe_write]);
4665 (void)close(pfd[pipe_read]);
4666 panicmsg = US"Unexpectedly no free subprocess slot";
4670 /* Now fork a subprocess to do the remote delivery, but before doing so,
4671 ensure that any cached resources are released so as not to interfere with
4672 what happens in the subprocess. */
4677 if ((pid = fork()) == 0)
4679 int fd = pfd[pipe_write];
4681 DEBUG(D_deliver) debug_selector |= D_pid; // hs12
4683 /* Setting this global in the subprocess means we need never clear it */
4684 transport_name = tp->name;
4686 /* There are weird circumstances in which logging is disabled */
4687 f.disable_logging = tp->disable_logging;
4689 /* Show pids on debug output if parallelism possible */
4691 if (parmax > 1 && (parcount > 0 || addr_remote))
4693 DEBUG(D_any|D_v) debug_selector |= D_pid;
4694 DEBUG(D_deliver) debug_printf("Remote delivery process started\n");
4697 /* Reset the random number generator, so different processes don't all
4698 have the same sequence. In the test harness we want different, but
4699 predictable settings for each delivery process, so do something explicit
4700 here rather they rely on the fixed reset in the random number function. */
4702 random_seed = f.running_in_test_harness ? 42 + 2*delivery_count : 0;
4704 /* Set close-on-exec on the pipe so that it doesn't get passed on to
4705 a new process that may be forked to do another delivery down the same
4708 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
4710 /* Close open file descriptors for the pipes of other processes
4711 that are running in parallel. */
4713 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4714 if (parlist[poffset].pid != 0) (void)close(parlist[poffset].fd);
4716 /* This process has inherited a copy of the file descriptor
4717 for the data file, but its file pointer is shared with all the
4718 other processes running in parallel. Therefore, we have to re-open
4719 the file in order to get a new file descriptor with its own
4720 file pointer. We don't need to lock it, as the lock is held by
4721 the parent process. There doesn't seem to be any way of doing
4722 a dup-with-new-file-pointer. */
4724 (void)close(deliver_datafile);
4726 uschar * fname = spool_fname(US"input", message_subdir, message_id, US"-D");
4728 if ((deliver_datafile = Uopen(fname,
4732 O_RDWR | O_APPEND, 0)) < 0)
4733 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to reopen %s for remote "
4734 "parallel delivery: %s", fname, strerror(errno));
4737 /* Set the close-on-exec flag */
4739 (void)fcntl(deliver_datafile, F_SETFD, fcntl(deliver_datafile, F_GETFD) |
4743 /* Set the uid/gid of this process; bombs out on failure. */
4745 exim_setugid(uid, gid, use_initgroups,
4746 string_sprintf("remote delivery to %s with transport=%s",
4747 addr->address, tp->name));
4749 /* Close the unwanted half of this process' pipe, set the process state,
4750 and run the transport. Afterwards, transport_count will contain the number
4751 of bytes written. */
4753 (void)close(pfd[pipe_read]);
4754 set_process_info("delivering %s using %s", message_id, tp->name);
4755 debug_print_string(tp->debug_string);
4756 if (!(tp->info->code)(addr->transport, addr)) replicate_status(addr);
4758 set_process_info("delivering %s (just run %s for %s%s in subprocess)",
4759 message_id, tp->name, addr->address, addr->next ? ", ..." : "");
4761 /* Ensure any cached resources that we used are now released */
4765 /* Pass the result back down the pipe. This is a lot more information
4766 than is needed for a local delivery. We have to send back the error
4767 status for each address, the usability status for each host that is
4768 flagged as unusable, and all the retry items. When TLS is in use, we
4769 send also the cipher and peerdn information. Each type of information
4770 is flagged by an identifying byte, and is then in a fixed format (with
4771 strings terminated by zeros), and there is a final terminator at the
4772 end. The host information and retry information is all attached to
4773 the first address, so that gets sent at the start. */
4775 /* Host unusability information: for most success cases this will
4778 for (h = addr->host_list; h; h = h->next)
4780 if (!h->address || h->status < hstatus_unusable) continue;
4781 sprintf(CS big_buffer, "%c%c%s", h->status, h->why, h->address);
4782 rmt_dlv_checked_write(fd, 'H', '0', big_buffer, Ustrlen(big_buffer+2) + 3);
4785 /* The number of bytes written. This is the same for each address. Even
4786 if we sent several copies of the message down the same connection, the
4787 size of each one is the same, and it's that value we have got because
4788 transport_count gets reset before calling transport_write_message(). */
4790 memcpy(big_buffer, &transport_count, sizeof(transport_count));
4791 rmt_dlv_checked_write(fd, 'S', '0', big_buffer, sizeof(transport_count));
4793 /* Information about what happened to each address. Four item types are
4794 used: an optional 'X' item first, for TLS information, then an optional "C"
4795 item for any client-auth info followed by 'R' items for any retry settings,
4796 and finally an 'A' item for the remaining data. */
4798 for(; addr; addr = addr->next)
4803 /* The certificate verification status goes into the flags */
4804 if (tls_out.certificate_verified) setflag(addr, af_cert_verified);
4806 if (tls_out.dane_verified) setflag(addr, af_dane_verified);
4809 /* Use an X item only if there's something to send */
4813 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", addr->cipher) + 1;
4817 ptr += sprintf(CS ptr, "%.512s", addr->peerdn) + 1;
4819 rmt_dlv_checked_write(fd, 'X', '1', big_buffer, ptr - big_buffer);
4821 else if (continue_proxy_cipher)
4823 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", continue_proxy_cipher) + 1;
4825 rmt_dlv_checked_write(fd, 'X', '1', big_buffer, ptr - big_buffer);
4831 if (!tls_export_cert(ptr, big_buffer_size-2, addr->peercert))
4835 rmt_dlv_checked_write(fd, 'X', '2', big_buffer, ptr - big_buffer);
4840 if (!tls_export_cert(ptr, big_buffer_size-2, addr->ourcert))
4844 rmt_dlv_checked_write(fd, 'X', '3', big_buffer, ptr - big_buffer);
4846 # ifndef DISABLE_OCSP
4847 if (addr->ocsp > OCSP_NOT_REQ)
4849 ptr = big_buffer + sprintf(CS big_buffer, "%c", addr->ocsp + '0') + 1;
4850 rmt_dlv_checked_write(fd, 'X', '4', big_buffer, ptr - big_buffer);
4853 #endif /*SUPPORT_TLS*/
4855 if (client_authenticator)
4857 ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticator) + 1;
4858 rmt_dlv_checked_write(fd, 'C', '1', big_buffer, ptr - big_buffer);
4860 if (client_authenticated_id)
4862 ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticated_id) + 1;
4863 rmt_dlv_checked_write(fd, 'C', '2', big_buffer, ptr - big_buffer);
4865 if (client_authenticated_sender)
4867 ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticated_sender) + 1;
4868 rmt_dlv_checked_write(fd, 'C', '3', big_buffer, ptr - big_buffer);
4871 #ifndef DISABLE_PRDR
4872 if (testflag(addr, af_prdr_used))
4873 rmt_dlv_checked_write(fd, 'P', '0', NULL, 0);
4876 if (testflag(addr, af_pipelining))
4877 rmt_dlv_checked_write(fd, 'L', '1', NULL, 0);
4879 if (testflag(addr, af_chunking_used))
4880 rmt_dlv_checked_write(fd, 'K', '0', NULL, 0);
4882 if (testflag(addr, af_tcp_fastopen_conn))
4883 rmt_dlv_checked_write(fd, 'T',
4884 testflag(addr, af_tcp_fastopen) ? '1' : '0', NULL, 0);
4886 memcpy(big_buffer, &addr->dsn_aware, sizeof(addr->dsn_aware));
4887 rmt_dlv_checked_write(fd, 'D', '0', big_buffer, sizeof(addr->dsn_aware));
4889 /* Retry information: for most success cases this will be null. */
4891 for (r = addr->retries; r; r = r->next)
4893 sprintf(CS big_buffer, "%c%.500s", r->flags, r->key);
4894 ptr = big_buffer + Ustrlen(big_buffer+2) + 3;
4895 memcpy(ptr, &r->basic_errno, sizeof(r->basic_errno));
4896 ptr += sizeof(r->basic_errno);
4897 memcpy(ptr, &r->more_errno, sizeof(r->more_errno));
4898 ptr += sizeof(r->more_errno);
4899 if (!r->message) *ptr++ = 0; else
4901 sprintf(CS ptr, "%.512s", r->message);
4904 rmt_dlv_checked_write(fd, 'R', '0', big_buffer, ptr - big_buffer);
4907 #ifdef SUPPORT_SOCKS
4908 if (LOGGING(proxy) && proxy_session)
4911 if (proxy_local_address)
4913 DEBUG(D_deliver) debug_printf("proxy_local_address '%s'\n", proxy_local_address);
4914 ptr = big_buffer + sprintf(CS ptr, "%.128s", proxy_local_address) + 1;
4915 DEBUG(D_deliver) debug_printf("proxy_local_port %d\n", proxy_local_port);
4916 memcpy(ptr, &proxy_local_port, sizeof(proxy_local_port));
4917 ptr += sizeof(proxy_local_port);
4921 rmt_dlv_checked_write(fd, 'A', '2', big_buffer, ptr - big_buffer);
4925 #ifdef EXPERIMENTAL_DSN_INFO
4926 /*um, are they really per-addr? Other per-conn stuff is not (auth, tls). But host_used is! */
4927 if (addr->smtp_greeting)
4929 DEBUG(D_deliver) debug_printf("smtp_greeting '%s'\n", addr->smtp_greeting);
4930 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", addr->smtp_greeting) + 1;
4931 if (addr->helo_response)
4933 DEBUG(D_deliver) debug_printf("helo_response '%s'\n", addr->helo_response);
4934 ptr += sprintf(CS ptr, "%.128s", addr->helo_response) + 1;
4938 rmt_dlv_checked_write(fd, 'A', '1', big_buffer, ptr - big_buffer);
4942 /* The rest of the information goes in an 'A0' item. */
4944 sprintf(CS big_buffer, "%c%c", addr->transport_return, addr->special_action);
4945 ptr = big_buffer + 2;
4946 memcpy(ptr, &addr->basic_errno, sizeof(addr->basic_errno));
4947 ptr += sizeof(addr->basic_errno);
4948 memcpy(ptr, &addr->more_errno, sizeof(addr->more_errno));
4949 ptr += sizeof(addr->more_errno);
4950 memcpy(ptr, &addr->delivery_usec, sizeof(addr->delivery_usec));
4951 ptr += sizeof(addr->delivery_usec);
4952 memcpy(ptr, &addr->flags, sizeof(addr->flags));
4953 ptr += sizeof(addr->flags);
4955 if (!addr->message) *ptr++ = 0; else
4956 ptr += sprintf(CS ptr, "%.1024s", addr->message) + 1;
4958 if (!addr->user_message) *ptr++ = 0; else
4959 ptr += sprintf(CS ptr, "%.1024s", addr->user_message) + 1;
4961 if (!addr->host_used) *ptr++ = 0; else
4963 ptr += sprintf(CS ptr, "%.256s", addr->host_used->name) + 1;
4964 ptr += sprintf(CS ptr, "%.64s", addr->host_used->address) + 1;
4965 memcpy(ptr, &addr->host_used->port, sizeof(addr->host_used->port));
4966 ptr += sizeof(addr->host_used->port);
4968 /* DNS lookup status */
4969 *ptr++ = addr->host_used->dnssec==DS_YES ? '2'
4970 : addr->host_used->dnssec==DS_NO ? '1' : '0';
4973 rmt_dlv_checked_write(fd, 'A', '0', big_buffer, ptr - big_buffer);
4976 /* Local interface address/port */
4977 #ifdef EXPERIMENTAL_DSN_INFO
4978 if (sending_ip_address)
4980 if (LOGGING(incoming_interface) && sending_ip_address)
4984 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", sending_ip_address) + 1;
4985 ptr += sprintf(CS ptr, "%d", sending_port) + 1;
4986 rmt_dlv_checked_write(fd, 'I', '0', big_buffer, ptr - big_buffer);
4989 /* Add termination flag, close the pipe, and that's it. The character
4990 after 'Z' indicates whether continue_transport is now NULL or not.
4991 A change from non-NULL to NULL indicates a problem with a continuing
4994 big_buffer[0] = continue_transport ? '1' : '0';
4995 rmt_dlv_checked_write(fd, 'Z', '0', big_buffer, 1);
5000 /* Back in the mainline: close the unwanted half of the pipe. */
5002 (void)close(pfd[pipe_write]);
5004 /* If we have a connection still open from a verify stage (lazy-close)
5005 release its TLS library context (if any) as responsibility was passed to
5006 the delivery child process. */
5008 if (cutthrough.cctx.sock >= 0 && cutthrough.callout_hold_only)
5011 if (cutthrough.is_tls)
5012 tls_close(cutthrough.cctx.tls_ctx, TLS_NO_SHUTDOWN);
5014 (void) close(cutthrough.cctx.sock);
5015 release_cutthrough_connection(US"passed to transport proc");
5018 /* Fork failed; defer with error message */
5022 (void)close(pfd[pipe_read]);
5023 panicmsg = string_sprintf("fork failed for remote delivery to %s: %s",
5024 addr->domain, strerror(errno));
5028 /* Fork succeeded; increment the count, and remember relevant data for
5029 when the process finishes. */
5032 parlist[poffset].addrlist = parlist[poffset].addr = addr;
5033 parlist[poffset].pid = pid;
5034 parlist[poffset].fd = pfd[pipe_read];
5035 parlist[poffset].done = FALSE;
5036 parlist[poffset].msg = NULL;
5037 parlist[poffset].return_path = return_path;
5039 /* If the process we've just started is sending a message down an existing
5040 channel, wait for it now. This ensures that only one such process runs at
5041 once, whatever the value of remote_max parallel. Otherwise, we might try to
5042 send two or more messages simultaneously down the same channel. This could
5043 happen if there are different domains that include the same host in otherwise
5044 different host lists.
5046 Also, if the transport closes down the channel, this information gets back
5047 (continue_transport gets set to NULL) before we consider any other addresses
5050 if (continue_transport) par_reduce(0, fallback);
5052 /* Otherwise, if we are running in the test harness, wait a bit, to let the
5053 newly created process get going before we create another process. This should
5054 ensure repeatability in the tests. We only need to wait a tad. */
5056 else if (f.running_in_test_harness) millisleep(500);
5061 if (serialize_key) enq_end(serialize_key);
5063 remote_post_process(addr, LOG_MAIN|LOG_PANIC, panicmsg, fallback);
5067 /* Reached the end of the list of addresses. Wait for all the subprocesses that
5068 are still running and post-process their addresses. */
5070 par_reduce(0, fallback);
5077 /*************************************************
5078 * Split an address into local part and domain *
5079 *************************************************/
5081 /* This function initializes an address for routing by splitting it up into a
5082 local part and a domain. The local part is set up twice - once in its original
5083 casing, and once in lower case, and it is dequoted. We also do the "percent
5084 hack" for configured domains. This may lead to a DEFER result if a lookup
5085 defers. When a percent-hacking takes place, we insert a copy of the original
5086 address as a new parent of this address, as if we have had a redirection.
5089 addr points to an addr_item block containing the address
5092 DEFER - could not determine if domain is %-hackable
5096 deliver_split_address(address_item * addr)
5098 uschar * address = addr->address;
5103 if (!(domain = Ustrrchr(address, '@')))
5104 return DEFER; /* should always have a domain, but just in case... */
5106 len = domain - address;
5107 addr->domain = string_copylc(domain+1); /* Domains are always caseless */
5109 /* The implication in the RFCs (though I can't say I've seen it spelled out
5110 explicitly) is that quoting should be removed from local parts at the point
5111 where they are locally interpreted. [The new draft "821" is more explicit on
5112 this, Jan 1999.] We know the syntax is valid, so this can be done by simply
5113 removing quoting backslashes and any unquoted doublequotes. */
5115 t = addr->cc_local_part = store_get(len+1);
5119 if (c == '\"') continue;
5129 /* We do the percent hack only for those domains that are listed in
5130 percent_hack_domains. A loop is required, to copy with multiple %-hacks. */
5132 if (percent_hack_domains)
5135 uschar *new_address = NULL;
5136 uschar *local_part = addr->cc_local_part;
5138 deliver_domain = addr->domain; /* set $domain */
5140 while ( (rc = match_isinlist(deliver_domain, (const uschar **)&percent_hack_domains, 0,
5141 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
5143 && (t = Ustrrchr(local_part, '%')) != NULL
5146 new_address = string_copy(local_part);
5147 new_address[t - local_part] = '@';
5148 deliver_domain = string_copylc(t+1);
5149 local_part = string_copyn(local_part, t - local_part);
5152 if (rc == DEFER) return DEFER; /* lookup deferred */
5154 /* If hackery happened, set up new parent and alter the current address. */
5158 address_item *new_parent = store_get(sizeof(address_item));
5159 *new_parent = *addr;
5160 addr->parent = new_parent;
5161 new_parent->child_count = 1;
5162 addr->address = new_address;
5163 addr->unique = string_copy(new_address);
5164 addr->domain = deliver_domain;
5165 addr->cc_local_part = local_part;
5166 DEBUG(D_deliver) debug_printf("%%-hack changed address to: %s\n",
5171 /* Create the lowercased version of the final local part, and make that the
5172 default one to be used. */
5174 addr->local_part = addr->lc_local_part = string_copylc(addr->cc_local_part);
5181 /*************************************************
5182 * Get next error message text *
5183 *************************************************/
5185 /* If f is not NULL, read the next "paragraph", from a customized error message
5186 text file, terminated by a line containing ****, and expand it.
5189 f NULL or a file to read from
5190 which string indicating which string (for errors)
5192 Returns: NULL or an expanded string
5196 next_emf(FILE *f, uschar *which)
5202 if (!f) return NULL;
5204 if (!Ufgets(buffer, sizeof(buffer), f) || Ustrcmp(buffer, "****\n") == 0)
5207 para = string_get(256);
5210 para = string_cat(para, buffer);
5211 if (!Ufgets(buffer, sizeof(buffer), f) || Ustrcmp(buffer, "****\n") == 0)
5214 if ((yield = expand_string(string_from_gstring(para))))
5217 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand string from "
5218 "bounce_message_file or warn_message_file (%s): %s", which,
5219 expand_string_message);
5226 /*************************************************
5227 * Close down a passed transport channel *
5228 *************************************************/
5230 /* This function is called when a passed transport channel cannot be used.
5231 It attempts to close it down tidily. The yield is always DELIVER_NOT_ATTEMPTED
5232 so that the function call can be the argument of a "return" statement.
5235 Returns: DELIVER_NOT_ATTEMPTED
5239 continue_closedown(void)
5241 if (continue_transport)
5243 transport_instance *t;
5244 for (t = transports; t; t = t->next)
5245 if (Ustrcmp(t->name, continue_transport) == 0)
5247 if (t->info->closedown) (t->info->closedown)(t);
5251 return DELIVER_NOT_ATTEMPTED;
5257 /*************************************************
5258 * Print address information *
5259 *************************************************/
5261 /* This function is called to output an address, or information about an
5262 address, for bounce or defer messages. If the hide_child flag is set, all we
5263 output is the original ancestor address.
5266 addr points to the address
5267 f the FILE to print to
5268 si an initial string
5269 sc a continuation string for before "generated"
5272 Returns: TRUE if the address is not hidden
5276 print_address_information(address_item *addr, FILE *f, uschar *si, uschar *sc,
5280 uschar *printed = US"";
5281 address_item *ancestor = addr;
5282 while (ancestor->parent) ancestor = ancestor->parent;
5284 fprintf(f, "%s", CS si);
5286 if (addr->parent && testflag(addr, af_hide_child))
5288 printed = US"an undisclosed address";
5291 else if (!testflag(addr, af_pfr) || !addr->parent)
5292 printed = addr->address;
5296 uschar *s = addr->address;
5299 if (addr->address[0] == '>') { ss = US"mail"; s++; }
5300 else if (addr->address[0] == '|') ss = US"pipe";
5303 fprintf(f, "%s to %s%sgenerated by ", ss, s, sc);
5304 printed = addr->parent->address;
5307 fprintf(f, "%s", CS string_printing(printed));
5309 if (ancestor != addr)
5311 uschar *original = ancestor->onetime_parent;
5312 if (!original) original= ancestor->address;
5313 if (strcmpic(original, printed) != 0)
5314 fprintf(f, "%s(%sgenerated from %s)", sc,
5315 ancestor != addr->parent ? "ultimately " : "",
5316 string_printing(original));
5319 if (addr->host_used)
5320 fprintf(f, "\n host %s [%s]",
5321 addr->host_used->name, addr->host_used->address);
5323 fprintf(f, "%s", CS se);
5331 /*************************************************
5332 * Print error for an address *
5333 *************************************************/
5335 /* This function is called to print the error information out of an address for
5336 a bounce or a warning message. It tries to format the message reasonably by
5337 introducing newlines. All lines are indented by 4; the initial printing
5338 position must be set before calling.
5340 This function used always to print the error. Nowadays we want to restrict it
5341 to cases such as LMTP/SMTP errors from a remote host, and errors from :fail:
5342 and filter "fail". We no longer pass other information willy-nilly in bounce
5343 and warning messages. Text in user_message is always output; text in message
5344 only if the af_pass_message flag is set.
5348 f the FILE to print on
5355 print_address_error(address_item *addr, FILE *f, uschar *t)
5357 int count = Ustrlen(t);
5358 uschar *s = testflag(addr, af_pass_message)? addr->message : NULL;
5360 if (!s && !(s = addr->user_message))
5363 fprintf(f, "\n %s", t);
5366 if (*s == '\\' && s[1] == 'n')
5376 if (*s++ == ':' && isspace(*s) && count > 45)
5378 fprintf(f, "\n "); /* sic (because space follows) */
5385 /***********************************************************
5386 * Print Diagnostic-Code for an address *
5387 ************************************************************/
5389 /* This function is called to print the error information out of an address for
5390 a bounce or a warning message. It tries to format the message reasonably as
5391 required by RFC 3461 by adding a space after each newline
5393 it uses the same logic as print_address_error() above. if af_pass_message is true
5394 and addr->message is set it uses the remote host answer. if not addr->user_message
5395 is used instead if available.
5399 f the FILE to print on
5405 print_dsn_diagnostic_code(const address_item *addr, FILE *f)
5407 uschar *s = testflag(addr, af_pass_message) ? addr->message : NULL;
5409 /* af_pass_message and addr->message set ? print remote host answer */
5413 debug_printf("DSN Diagnostic-Code: addr->message = %s\n", addr->message);
5415 /* search first ": ". we assume to find the remote-MTA answer there */
5416 if (!(s = Ustrstr(addr->message, ": ")))
5417 return; /* not found, bail out */
5418 s += 2; /* skip ": " */
5419 fprintf(f, "Diagnostic-Code: smtp; ");
5421 /* no message available. do nothing */
5425 if (*s == '\\' && s[1] == 'n')
5427 fputs("\n ", f); /* as defined in RFC 3461 */
5437 /*************************************************
5438 * Check list of addresses for duplication *
5439 *************************************************/
5441 /* This function was introduced when the test for duplicate addresses that are
5442 not pipes, files, or autoreplies was moved from the middle of routing to when
5443 routing was complete. That was to fix obscure cases when the routing history
5444 affects the subsequent routing of identical addresses. This function is called
5445 after routing, to check that the final routed addresses are not duplicates.
5447 If we detect a duplicate, we remember what it is a duplicate of. Note that
5448 pipe, file, and autoreply de-duplication is handled during routing, so we must
5449 leave such "addresses" alone here, as otherwise they will incorrectly be
5452 Argument: address of list anchor
5457 do_duplicate_check(address_item **anchor)
5460 while ((addr = *anchor))
5463 if (testflag(addr, af_pfr))
5465 anchor = &(addr->next);
5467 else if ((tnode = tree_search(tree_duplicates, addr->unique)))
5469 DEBUG(D_deliver|D_route)
5470 debug_printf("%s is a duplicate address: discarded\n", addr->unique);
5471 *anchor = addr->next;
5472 addr->dupof = tnode->data.ptr;
5473 addr->next = addr_duplicate;
5474 addr_duplicate = addr;
5478 tree_add_duplicate(addr->unique, addr);
5479 anchor = &(addr->next);
5487 /*************************************************
5488 * Deliver one message *
5489 *************************************************/
5491 /* This is the function which is called when a message is to be delivered. It
5492 is passed the id of the message. It is possible that the message no longer
5493 exists, if some other process has delivered it, and it is also possible that
5494 the message is being worked on by another process, in which case the data file
5497 If no delivery is attempted for any of the above reasons, the function returns
5498 DELIVER_NOT_ATTEMPTED.
5500 If the give_up flag is set true, do not attempt any deliveries, but instead
5501 fail all outstanding addresses and return the message to the sender (or
5504 A delivery operation has a process all to itself; we never deliver more than
5505 one message in the same process. Therefore we needn't worry too much about
5508 Liable to be called as root.
5511 id the id of the message to be delivered
5512 forced TRUE if delivery was forced by an administrator; this overrides
5513 retry delays and causes a delivery to be tried regardless
5514 give_up TRUE if an administrator has requested that delivery attempts
5517 Returns: When the global variable mua_wrapper is FALSE:
5518 DELIVER_ATTEMPTED_NORMAL if a delivery attempt was made
5519 DELIVER_NOT_ATTEMPTED otherwise (see comment above)
5520 When the global variable mua_wrapper is TRUE:
5521 DELIVER_MUA_SUCCEEDED if delivery succeeded
5522 DELIVER_MUA_FAILED if delivery failed
5523 DELIVER_NOT_ATTEMPTED if not attempted (should not occur)
5527 deliver_message(uschar *id, BOOL forced, BOOL give_up)
5530 int final_yield = DELIVER_ATTEMPTED_NORMAL;
5531 time_t now = time(NULL);
5532 address_item *addr_last = NULL;
5533 uschar *filter_message = NULL;
5534 int process_recipients = RECIP_ACCEPT;
5537 extern int acl_where;
5539 uschar *info = queue_run_pid == (pid_t)0
5540 ? string_sprintf("delivering %s", id)
5541 : string_sprintf("delivering %s (queue run pid %d)", id, queue_run_pid);
5543 /* If the D_process_info bit is on, set_process_info() will output debugging
5544 information. If not, we want to show this initial information if D_deliver or
5545 D_queue_run is set or in verbose mode. */
5547 set_process_info("%s", info);
5549 if ( !(debug_selector & D_process_info)
5550 && (debug_selector & (D_deliver|D_queue_run|D_v))
5552 debug_printf("%s\n", info);
5554 /* Ensure that we catch any subprocesses that are created. Although Exim
5555 sets SIG_DFL as its initial default, some routes through the code end up
5556 here with it set to SIG_IGN - cases where a non-synchronous delivery process
5557 has been forked, but no re-exec has been done. We use sigaction rather than
5558 plain signal() on those OS where SA_NOCLDWAIT exists, because we want to be
5559 sure it is turned off. (There was a problem on AIX with this.) */
5563 struct sigaction act;
5564 act.sa_handler = SIG_DFL;
5565 sigemptyset(&(act.sa_mask));
5567 sigaction(SIGCHLD, &act, NULL);
5570 signal(SIGCHLD, SIG_DFL);
5573 /* Make the forcing flag available for routers and transports, set up the
5574 global message id field, and initialize the count for returned files and the
5575 message size. This use of strcpy() is OK because the length id is checked when
5576 it is obtained from a command line (the -M or -q options), and otherwise it is
5577 known to be a valid message id. */
5579 Ustrcpy(message_id, id);
5580 f.deliver_force = forced;
5584 /* Initialize some flags */
5586 update_spool = FALSE;
5587 remove_journal = TRUE;
5589 /* Set a known context for any ACLs we call via expansions */
5590 acl_where = ACL_WHERE_DELIVERY;
5592 /* Reset the random number generator, so that if several delivery processes are
5593 started from a queue runner that has already used random numbers (for sorting),
5594 they don't all get the same sequence. */
5598 /* Open and lock the message's data file. Exim locks on this one because the
5599 header file may get replaced as it is re-written during the delivery process.
5600 Any failures cause messages to be written to the log, except for missing files
5601 while queue running - another process probably completed delivery. As part of
5602 opening the data file, message_subdir gets set. */
5604 if ((deliver_datafile = spool_open_datafile(id)) < 0)
5605 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5607 /* The value of message_size at this point has been set to the data length,
5608 plus one for the blank line that notionally precedes the data. */
5610 /* Now read the contents of the header file, which will set up the headers in
5611 store, and also the list of recipients and the tree of non-recipients and
5612 assorted flags. It updates message_size. If there is a reading or format error,
5613 give up; if the message has been around for sufficiently long, remove it. */
5616 uschar * spoolname = string_sprintf("%s-H", id);
5617 if ((rc = spool_read_header(spoolname, TRUE, TRUE)) != spool_read_OK)
5619 if (errno == ERRNO_SPOOLFORMAT)
5621 struct stat statbuf;
5622 if (Ustat(spool_fname(US"input", message_subdir, spoolname, US""),
5624 log_write(0, LOG_MAIN, "Format error in spool file %s: "
5625 "size=" OFF_T_FMT, spoolname, statbuf.st_size);
5627 log_write(0, LOG_MAIN, "Format error in spool file %s", spoolname);
5630 log_write(0, LOG_MAIN, "Error reading spool file %s: %s", spoolname,
5633 /* If we managed to read the envelope data, received_time contains the
5634 time the message was received. Otherwise, we can calculate it from the
5637 if (rc != spool_read_hdrerror)
5639 received_time.tv_sec = received_time.tv_usec = 0;
5640 /*XXX subsec precision?*/
5641 for (i = 0; i < 6; i++)
5642 received_time.tv_sec = received_time.tv_sec * BASE_62 + tab62[id[i] - '0'];
5645 /* If we've had this malformed message too long, sling it. */
5647 if (now - received_time.tv_sec > keep_malformed)
5649 Uunlink(spool_fname(US"msglog", message_subdir, id, US""));
5650 Uunlink(spool_fname(US"input", message_subdir, id, US"-D"));
5651 Uunlink(spool_fname(US"input", message_subdir, id, US"-H"));
5652 Uunlink(spool_fname(US"input", message_subdir, id, US"-J"));
5653 log_write(0, LOG_MAIN, "Message removed because older than %s",
5654 readconf_printtime(keep_malformed));
5657 (void)close(deliver_datafile);
5658 deliver_datafile = -1;
5659 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5663 /* The spool header file has been read. Look to see if there is an existing
5664 journal file for this message. If there is, it means that a previous delivery
5665 attempt crashed (program or host) before it could update the spool header file.
5666 Read the list of delivered addresses from the journal and add them to the
5667 nonrecipients tree. Then update the spool file. We can leave the journal in
5668 existence, as it will get further successful deliveries added to it in this
5669 run, and it will be deleted if this function gets to its end successfully.
5670 Otherwise it might be needed again. */
5673 uschar * fname = spool_fname(US"input", message_subdir, id, US"-J");
5676 if ( (journal_fd = Uopen(fname, O_RDWR|O_APPEND
5684 && lseek(journal_fd, 0, SEEK_SET) == 0
5685 && (jread = fdopen(journal_fd, "rb"))
5688 while (Ufgets(big_buffer, big_buffer_size, jread))
5690 int n = Ustrlen(big_buffer);
5691 big_buffer[n-1] = 0;
5692 tree_add_nonrecipient(big_buffer);
5693 DEBUG(D_deliver) debug_printf("Previously delivered address %s taken from "
5694 "journal file\n", big_buffer);
5697 if ((journal_fd = dup(fileno(jread))) < 0)
5698 journal_fd = fileno(jread);
5700 (void) fclose(jread); /* Try to not leak the FILE resource */
5702 /* Panic-dies on error */
5703 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
5705 else if (errno != ENOENT)
5707 log_write(0, LOG_MAIN|LOG_PANIC, "attempt to open journal for reading gave: "
5708 "%s", strerror(errno));
5709 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5712 /* A null recipients list indicates some kind of disaster. */
5714 if (!recipients_list)
5716 (void)close(deliver_datafile);
5717 deliver_datafile = -1;
5718 log_write(0, LOG_MAIN, "Spool error: no recipients for %s", fname);
5719 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5724 /* Handle a message that is frozen. There are a number of different things that
5725 can happen, but in the default situation, unless forced, no delivery is
5728 if (f.deliver_freeze)
5730 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
5731 /* Moving to another directory removes the message from Exim's view. Other
5732 tools must be used to deal with it. Logging of this action happens in
5733 spool_move_message() and its subfunctions. */
5735 if ( move_frozen_messages
5736 && spool_move_message(id, message_subdir, US"", US"F")
5738 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5741 /* For all frozen messages (bounces or not), timeout_frozen_after sets the
5742 maximum time to keep messages that are frozen. Thaw if we reach it, with a
5743 flag causing all recipients to be failed. The time is the age of the
5744 message, not the time since freezing. */
5746 if (timeout_frozen_after > 0 && message_age >= timeout_frozen_after)
5748 log_write(0, LOG_MAIN, "cancelled by timeout_frozen_after");
5749 process_recipients = RECIP_FAIL_TIMEOUT;
5752 /* For bounce messages (and others with no sender), thaw if the error message
5753 ignore timer is exceeded. The message will be discarded if this delivery
5756 else if (!*sender_address && message_age >= ignore_bounce_errors_after)
5757 log_write(0, LOG_MAIN, "Unfrozen by errmsg timer");
5759 /* If this is a bounce message, or there's no auto thaw, or we haven't
5760 reached the auto thaw time yet, and this delivery is not forced by an admin
5761 user, do not attempt delivery of this message. Note that forced is set for
5762 continuing messages down the same channel, in order to skip load checking and
5763 ignore hold domains, but we don't want unfreezing in that case. */
5767 if ( ( sender_address[0] == 0
5769 || now <= deliver_frozen_at + auto_thaw
5771 && ( !forced || !f.deliver_force_thaw
5772 || !f.admin_user || continue_hostname
5775 (void)close(deliver_datafile);
5776 deliver_datafile = -1;
5777 log_write(L_skip_delivery, LOG_MAIN, "Message is frozen");
5778 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5781 /* If delivery was forced (by an admin user), assume a manual thaw.
5782 Otherwise it's an auto thaw. */
5786 f.deliver_manual_thaw = TRUE;
5787 log_write(0, LOG_MAIN, "Unfrozen by forced delivery");
5789 else log_write(0, LOG_MAIN, "Unfrozen by auto-thaw");
5792 /* We get here if any of the rules for unfreezing have triggered. */
5794 f.deliver_freeze = FALSE;
5795 update_spool = TRUE;
5799 /* Open the message log file if we are using them. This records details of
5800 deliveries, deferments, and failures for the benefit of the mail administrator.
5801 The log is not used by exim itself to track the progress of a message; that is
5802 done by rewriting the header spool file. */
5806 uschar * fname = spool_fname(US"msglog", message_subdir, id, US"");
5810 if ((fd = open_msglog_file(fname, SPOOL_MODE, &error)) < 0)
5812 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't %s message log %s: %s", error,
5813 fname, strerror(errno));
5814 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5817 /* Make a C stream out of it. */
5819 if (!(message_log = fdopen(fd, "a")))
5821 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't fdopen message log %s: %s",
5822 fname, strerror(errno));
5823 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5828 /* If asked to give up on a message, log who did it, and set the action for all
5833 struct passwd *pw = getpwuid(real_uid);
5834 log_write(0, LOG_MAIN, "cancelled by %s",
5835 pw ? US pw->pw_name : string_sprintf("uid %ld", (long int)real_uid));
5836 process_recipients = RECIP_FAIL;
5839 /* Otherwise, if there are too many Received: headers, fail all recipients. */
5841 else if (received_count > received_headers_max)
5842 process_recipients = RECIP_FAIL_LOOP;
5844 /* Otherwise, if a system-wide, address-independent message filter is
5845 specified, run it now, except in the case when we are failing all recipients as
5846 a result of timeout_frozen_after. If the system filter yields "delivered", then
5847 ignore the true recipients of the message. Failure of the filter file is
5848 logged, and the delivery attempt fails. */
5850 else if (system_filter && process_recipients != RECIP_FAIL_TIMEOUT)
5855 redirect_block redirect;
5857 if (system_filter_uid_set)
5859 ugid.uid = system_filter_uid;
5860 ugid.gid = system_filter_gid;
5861 ugid.uid_set = ugid.gid_set = TRUE;
5865 ugid.uid_set = ugid.gid_set = FALSE;
5868 return_path = sender_address;
5869 f.enable_dollar_recipients = TRUE; /* Permit $recipients in system filter */
5870 f.system_filtering = TRUE;
5872 /* Any error in the filter file causes a delivery to be abandoned. */
5874 redirect.string = system_filter;
5875 redirect.isfile = TRUE;
5876 redirect.check_owner = redirect.check_group = FALSE;
5877 redirect.owners = NULL;
5878 redirect.owngroups = NULL;
5880 redirect.modemask = 0;
5882 DEBUG(D_deliver|D_filter) debug_printf("running system filter\n");
5885 &redirect, /* Where the data is */
5886 RDO_DEFER | /* Turn on all the enabling options */
5887 RDO_FAIL | /* Leave off all the disabling options */
5892 NULL, /* No :include: restriction (not used in filter) */
5893 NULL, /* No sieve vacation directory (not sieve!) */
5894 NULL, /* No sieve enotify mailto owner (not sieve!) */
5895 NULL, /* No sieve user address (not sieve!) */
5896 NULL, /* No sieve subaddress (not sieve!) */
5897 &ugid, /* uid/gid data */
5898 &addr_new, /* Where to hang generated addresses */
5899 &filter_message, /* Where to put error message */
5900 NULL, /* Don't skip syntax errors */
5901 &filtertype, /* Will always be set to FILTER_EXIM for this call */
5902 US"system filter"); /* For error messages */
5904 DEBUG(D_deliver|D_filter) debug_printf("system filter returned %d\n", rc);
5906 if (rc == FF_ERROR || rc == FF_NONEXIST)
5908 (void)close(deliver_datafile);
5909 deliver_datafile = -1;
5910 log_write(0, LOG_MAIN|LOG_PANIC, "Error in system filter: %s",
5911 string_printing(filter_message));
5912 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5915 /* Reset things. If the filter message is an empty string, which can happen
5916 for a filter "fail" or "freeze" command with no text, reset it to NULL. */
5918 f.system_filtering = FALSE;
5919 f.enable_dollar_recipients = FALSE;
5920 if (filter_message && filter_message[0] == 0) filter_message = NULL;
5922 /* Save the values of the system filter variables so that user filters
5925 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5927 /* The filter can request that delivery of the original addresses be
5932 process_recipients = RECIP_DEFER;
5933 deliver_msglog("Delivery deferred by system filter\n");
5934 log_write(0, LOG_MAIN, "Delivery deferred by system filter");
5937 /* The filter can request that a message be frozen, but this does not
5938 take place if the message has been manually thawed. In that case, we must
5939 unset "delivered", which is forced by the "freeze" command to make -bF
5942 else if (rc == FF_FREEZE && !f.deliver_manual_thaw)
5944 f.deliver_freeze = TRUE;
5945 deliver_frozen_at = time(NULL);
5946 process_recipients = RECIP_DEFER;
5947 frozen_info = string_sprintf(" by the system filter%s%s",
5948 filter_message ? US": " : US"",
5949 filter_message ? filter_message : US"");
5952 /* The filter can request that a message be failed. The error message may be
5953 quite long - it is sent back to the sender in the bounce - but we don't want
5954 to fill up the log with repetitions of it. If it starts with << then the text
5955 between << and >> is written to the log, with the rest left for the bounce
5958 else if (rc == FF_FAIL)
5960 uschar *colon = US"";
5961 uschar *logmsg = US"";
5964 process_recipients = RECIP_FAIL_FILTER;
5970 if ( filter_message[0] == '<'
5971 && filter_message[1] == '<'
5972 && (logend = Ustrstr(filter_message, ">>"))
5975 logmsg = filter_message + 2;
5976 loglen = logend - logmsg;
5977 filter_message = logend + 2;
5978 if (filter_message[0] == 0) filter_message = NULL;
5982 logmsg = filter_message;
5983 loglen = Ustrlen(filter_message);
5987 log_write(0, LOG_MAIN, "cancelled by system filter%s%.*s", colon, loglen,
5991 /* Delivery can be restricted only to those recipients (if any) that the
5992 filter specified. */
5994 else if (rc == FF_DELIVERED)
5996 process_recipients = RECIP_IGNORE;
5998 log_write(0, LOG_MAIN, "original recipients ignored (system filter)");
6000 log_write(0, LOG_MAIN, "=> discarded (system filter)");
6003 /* If any new addresses were created by the filter, fake up a "parent"
6004 for them. This is necessary for pipes, etc., which are expected to have
6005 parents, and it also gives some sensible logging for others. Allow
6006 pipes, files, and autoreplies, and run them as the filter uid if set,
6007 otherwise as the current uid. */
6011 int uid = (system_filter_uid_set)? system_filter_uid : geteuid();
6012 int gid = (system_filter_gid_set)? system_filter_gid : getegid();
6014 /* The text "system-filter" is tested in transport_set_up_command() and in
6015 set_up_shell_command() in the pipe transport, to enable them to permit
6016 $recipients, so don't change it here without also changing it there. */
6018 address_item *p = addr_new;
6019 address_item *parent = deliver_make_addr(US"system-filter", FALSE);
6021 parent->domain = string_copylc(qualify_domain_recipient);
6022 parent->local_part = US"system-filter";
6024 /* As part of this loop, we arrange for addr_last to end up pointing
6025 at the final address. This is used if we go on to add addresses for the
6026 original recipients. */
6030 if (parent->child_count == USHRT_MAX)
6031 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "system filter generated more "
6032 "than %d delivery addresses", USHRT_MAX);
6033 parent->child_count++;
6036 if (testflag(p, af_pfr))
6042 setflag(p, af_uid_set);
6043 setflag(p, af_gid_set);
6044 setflag(p, af_allow_file);
6045 setflag(p, af_allow_pipe);
6046 setflag(p, af_allow_reply);
6048 /* Find the name of the system filter's appropriate pfr transport */
6050 if (p->address[0] == '|')
6053 tpname = system_filter_pipe_transport;
6054 address_pipe = p->address;
6056 else if (p->address[0] == '>')
6059 tpname = system_filter_reply_transport;
6063 if (p->address[Ustrlen(p->address)-1] == '/')
6065 type = US"directory";
6066 tpname = system_filter_directory_transport;
6071 tpname = system_filter_file_transport;
6073 address_file = p->address;
6076 /* Now find the actual transport, first expanding the name. We have
6077 set address_file or address_pipe above. */
6081 uschar *tmp = expand_string(tpname);
6082 address_file = address_pipe = NULL;
6084 p->message = string_sprintf("failed to expand \"%s\" as a "
6085 "system filter transport name", tpname);
6089 p->message = string_sprintf("system_filter_%s_transport is unset",
6094 transport_instance *tp;
6095 for (tp = transports; tp; tp = tp->next)
6096 if (Ustrcmp(tp->name, tpname) == 0)
6102 p->message = string_sprintf("failed to find \"%s\" transport "
6103 "for system filter delivery", tpname);
6106 /* If we couldn't set up a transport, defer the delivery, putting the
6107 error on the panic log as well as the main log. */
6111 address_item *badp = p;
6113 if (!addr_last) addr_new = p; else addr_last->next = p;
6114 badp->local_part = badp->address; /* Needed for log line */
6115 post_process_one(badp, DEFER, LOG_MAIN|LOG_PANIC, EXIM_DTYPE_ROUTER, 0);
6118 } /* End of pfr handling */
6120 /* Either a non-pfr delivery, or we found a transport */
6122 DEBUG(D_deliver|D_filter)
6123 debug_printf("system filter added %s\n", p->address);
6127 } /* Loop through all addr_new addresses */
6132 /* Scan the recipients list, and for every one that is not in the non-
6133 recipients tree, add an addr item to the chain of new addresses. If the pno
6134 value is non-negative, we must set the onetime parent from it. This which
6135 points to the relevant entry in the recipients list.
6137 This processing can be altered by the setting of the process_recipients
6138 variable, which is changed if recipients are to be ignored, failed, or
6139 deferred. This can happen as a result of system filter activity, or if the -Mg
6140 option is used to fail all of them.
6142 Duplicate addresses are handled later by a different tree structure; we can't
6143 just extend the non-recipients tree, because that will be re-written to the
6144 spool if the message is deferred, and in any case there are casing
6145 complications for local addresses. */
6147 if (process_recipients != RECIP_IGNORE)
6148 for (i = 0; i < recipients_count; i++)
6149 if (!tree_search(tree_nonrecipients, recipients_list[i].address))
6151 recipient_item *r = recipients_list + i;
6152 address_item *new = deliver_make_addr(r->address, FALSE);
6153 new->prop.errors_address = r->errors_to;
6155 if ((new->prop.utf8_msg = message_smtputf8))
6157 new->prop.utf8_downcvt = message_utf8_downconvert == 1;
6158 new->prop.utf8_downcvt_maybe = message_utf8_downconvert == -1;
6159 DEBUG(D_deliver) debug_printf("utf8, downconvert %s\n",
6160 new->prop.utf8_downcvt ? "yes"
6161 : new->prop.utf8_downcvt_maybe ? "ifneeded"
6167 new->onetime_parent = recipients_list[r->pno].address;
6169 /* If DSN support is enabled, set the dsn flags and the original receipt
6170 to be passed on to other DSN enabled MTAs */
6171 new->dsn_flags = r->dsn_flags & rf_dsnflags;
6172 new->dsn_orcpt = r->orcpt;
6173 DEBUG(D_deliver) debug_printf("DSN: set orcpt: %s flags: %d\n",
6174 new->dsn_orcpt ? new->dsn_orcpt : US"", new->dsn_flags);
6176 switch (process_recipients)
6178 /* RECIP_DEFER is set when a system filter freezes a message. */
6181 new->next = addr_defer;
6186 /* RECIP_FAIL_FILTER is set when a system filter has obeyed a "fail"
6189 case RECIP_FAIL_FILTER:
6191 filter_message ? filter_message : US"delivery cancelled";
6192 setflag(new, af_pass_message);
6193 goto RECIP_QUEUE_FAILED; /* below */
6196 /* RECIP_FAIL_TIMEOUT is set when a message is frozen, but is older
6197 than the value in timeout_frozen_after. Treat non-bounce messages
6198 similarly to -Mg; for bounce messages we just want to discard, so
6199 don't put the address on the failed list. The timeout has already
6202 case RECIP_FAIL_TIMEOUT:
6203 new->message = US"delivery cancelled; message timed out";
6204 goto RECIP_QUEUE_FAILED; /* below */
6207 /* RECIP_FAIL is set when -Mg has been used. */
6210 new->message = US"delivery cancelled by administrator";
6213 /* Common code for the failure cases above. If this is not a bounce
6214 message, put the address on the failed list so that it is used to
6215 create a bounce. Otherwise do nothing - this just discards the address.
6216 The incident has already been logged. */
6219 if (sender_address[0])
6221 new->next = addr_failed;
6227 /* RECIP_FAIL_LOOP is set when there are too many Received: headers
6228 in the message. Process each address as a routing failure; if this
6229 is a bounce message, it will get frozen. */
6231 case RECIP_FAIL_LOOP:
6232 new->message = US"Too many \"Received\" headers - suspected mail loop";
6233 post_process_one(new, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6237 /* Value should be RECIP_ACCEPT; take this as the safe default. */
6240 if (!addr_new) addr_new = new; else addr_last->next = new;
6245 #ifndef DISABLE_EVENT
6246 if (process_recipients != RECIP_ACCEPT)
6248 uschar * save_local = deliver_localpart;
6249 const uschar * save_domain = deliver_domain;
6250 uschar * addr = new->address, * errmsg = NULL;
6251 int start, end, dom;
6253 if (!parse_extract_address(addr, &errmsg, &start, &end, &dom, TRUE))
6254 log_write(0, LOG_MAIN|LOG_PANIC,
6255 "failed to parse address '%.100s': %s\n", addr, errmsg);
6259 string_copyn(addr+start, dom ? (dom-1) - start : end - start);
6260 deliver_domain = dom ? CUS string_copyn(addr+dom, end - dom) : CUS"";
6262 event_raise(event_action, US"msg:fail:internal", new->message);
6264 deliver_localpart = save_local;
6265 deliver_domain = save_domain;
6274 debug_printf("Delivery address list:\n");
6275 for (p = addr_new; p; p = p->next)
6276 debug_printf(" %s %s\n", p->address,
6277 p->onetime_parent ? p->onetime_parent : US"");
6280 /* Set up the buffers used for copying over the file when delivering. */
6282 deliver_in_buffer = store_malloc(DELIVER_IN_BUFFER_SIZE);
6283 deliver_out_buffer = store_malloc(DELIVER_OUT_BUFFER_SIZE);
6287 /* Until there are no more new addresses, handle each one as follows:
6289 . If this is a generated address (indicated by the presence of a parent
6290 pointer) then check to see whether it is a pipe, file, or autoreply, and
6291 if so, handle it directly here. The router that produced the address will
6292 have set the allow flags into the address, and also set the uid/gid required.
6293 Having the routers generate new addresses and then checking them here at
6294 the outer level is tidier than making each router do the checking, and
6295 means that routers don't need access to the failed address queue.
6297 . Break up the address into local part and domain, and make lowercased
6298 versions of these strings. We also make unquoted versions of the local part.
6300 . Handle the percent hack for those domains for which it is valid.
6302 . For child addresses, determine if any of the parents have the same address.
6303 If so, generate a different string for previous delivery checking. Without
6304 this code, if the address spqr generates spqr via a forward or alias file,
6305 delivery of the generated spqr stops further attempts at the top level spqr,
6306 which is not what is wanted - it may have generated other addresses.
6308 . Check on the retry database to see if routing was previously deferred, but
6309 only if in a queue run. Addresses that are to be routed are put on the
6310 addr_route chain. Addresses that are to be deferred are put on the
6311 addr_defer chain. We do all the checking first, so as not to keep the
6312 retry database open any longer than necessary.
6314 . Now we run the addresses through the routers. A router may put the address
6315 on either the addr_local or the addr_remote chain for local or remote
6316 delivery, respectively, or put it on the addr_failed chain if it is
6317 undeliveable, or it may generate child addresses and put them on the
6318 addr_new chain, or it may defer an address. All the chain anchors are
6319 passed as arguments so that the routers can be called for verification
6322 . If new addresses have been generated by the routers, da capo.
6325 f.header_rewritten = FALSE; /* No headers rewritten yet */
6326 while (addr_new) /* Loop until all addresses dealt with */
6328 address_item *addr, *parent;
6330 /* Failure to open the retry database is treated the same as if it does
6331 not exist. In both cases, dbm_file is NULL. */
6333 if (!(dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE)))
6334 DEBUG(D_deliver|D_retry|D_route|D_hints_lookup)
6335 debug_printf("no retry data available\n");
6337 /* Scan the current batch of new addresses, to handle pipes, files and
6338 autoreplies, and determine which others are ready for routing. */
6345 dbdata_retry *domain_retry_record;
6346 dbdata_retry *address_retry_record;
6349 addr_new = addr->next;
6351 DEBUG(D_deliver|D_retry|D_route)
6353 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
6354 debug_printf("Considering: %s\n", addr->address);
6357 /* Handle generated address that is a pipe or a file or an autoreply. */
6359 if (testflag(addr, af_pfr))
6361 /* If an autoreply in a filter could not generate a syntactically valid
6362 address, give up forthwith. Set af_ignore_error so that we don't try to
6363 generate a bounce. */
6365 if (testflag(addr, af_bad_reply))
6367 addr->basic_errno = ERRNO_BADADDRESS2;
6368 addr->local_part = addr->address;
6370 US"filter autoreply generated syntactically invalid recipient";
6371 addr->prop.ignore_error = TRUE;
6372 (void) post_process_one(addr, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6373 continue; /* with the next new address */
6376 /* If two different users specify delivery to the same pipe or file or
6377 autoreply, there should be two different deliveries, so build a unique
6378 string that incorporates the original address, and use this for
6379 duplicate testing and recording delivery, and also for retrying. */
6382 string_sprintf("%s:%s", addr->address, addr->parent->unique +
6383 (testflag(addr->parent, af_homonym)? 3:0));
6385 addr->address_retry_key = addr->domain_retry_key =
6386 string_sprintf("T:%s", addr->unique);
6388 /* If a filter file specifies two deliveries to the same pipe or file,
6389 we want to de-duplicate, but this is probably not wanted for two mail
6390 commands to the same address, where probably both should be delivered.
6391 So, we have to invent a different unique string in that case. Just
6392 keep piling '>' characters on the front. */
6394 if (addr->address[0] == '>')
6396 while (tree_search(tree_duplicates, addr->unique))
6397 addr->unique = string_sprintf(">%s", addr->unique);
6400 else if ((tnode = tree_search(tree_duplicates, addr->unique)))
6402 DEBUG(D_deliver|D_route)
6403 debug_printf("%s is a duplicate address: discarded\n", addr->address);
6404 addr->dupof = tnode->data.ptr;
6405 addr->next = addr_duplicate;
6406 addr_duplicate = addr;
6410 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
6412 /* Check for previous delivery */
6414 if (tree_search(tree_nonrecipients, addr->unique))
6416 DEBUG(D_deliver|D_route)
6417 debug_printf("%s was previously delivered: discarded\n", addr->address);
6418 child_done(addr, tod_stamp(tod_log));
6422 /* Save for checking future duplicates */
6424 tree_add_duplicate(addr->unique, addr);
6426 /* Set local part and domain */
6428 addr->local_part = addr->address;
6429 addr->domain = addr->parent->domain;
6431 /* Ensure that the delivery is permitted. */
6433 if (testflag(addr, af_file))
6435 if (!testflag(addr, af_allow_file))
6437 addr->basic_errno = ERRNO_FORBIDFILE;
6438 addr->message = US"delivery to file forbidden";
6439 (void)post_process_one(addr, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6440 continue; /* with the next new address */
6443 else if (addr->address[0] == '|')
6445 if (!testflag(addr, af_allow_pipe))
6447 addr->basic_errno = ERRNO_FORBIDPIPE;
6448 addr->message = US"delivery to pipe forbidden";
6449 (void)post_process_one(addr, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6450 continue; /* with the next new address */
6453 else if (!testflag(addr, af_allow_reply))
6455 addr->basic_errno = ERRNO_FORBIDREPLY;
6456 addr->message = US"autoreply forbidden";
6457 (void)post_process_one(addr, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6458 continue; /* with the next new address */
6461 /* If the errno field is already set to BADTRANSPORT, it indicates
6462 failure to expand a transport string, or find the associated transport,
6463 or an unset transport when one is required. Leave this test till now so
6464 that the forbid errors are given in preference. */
6466 if (addr->basic_errno == ERRNO_BADTRANSPORT)
6468 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6472 /* Treat /dev/null as a special case and abandon the delivery. This
6473 avoids having to specify a uid on the transport just for this case.
6474 Arrange for the transport name to be logged as "**bypassed**". */
6476 if (Ustrcmp(addr->address, "/dev/null") == 0)
6478 uschar *save = addr->transport->name;
6479 addr->transport->name = US"**bypassed**";
6480 (void)post_process_one(addr, OK, LOG_MAIN, EXIM_DTYPE_TRANSPORT, '=');
6481 addr->transport->name = save;
6482 continue; /* with the next new address */
6485 /* Pipe, file, or autoreply delivery is to go ahead as a normal local
6488 DEBUG(D_deliver|D_route)
6489 debug_printf("queued for %s transport\n", addr->transport->name);
6490 addr->next = addr_local;
6492 continue; /* with the next new address */
6495 /* Handle normal addresses. First, split up into local part and domain,
6496 handling the %-hack if necessary. There is the possibility of a defer from
6497 a lookup in percent_hack_domains. */
6499 if ((rc = deliver_split_address(addr)) == DEFER)
6501 addr->message = US"cannot check percent_hack_domains";
6502 addr->basic_errno = ERRNO_LISTDEFER;
6503 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_NONE, 0);
6507 /* Check to see if the domain is held. If so, proceed only if the
6508 delivery was forced by hand. */
6510 deliver_domain = addr->domain; /* set $domain */
6511 if ( !forced && hold_domains
6512 && (rc = match_isinlist(addr->domain, (const uschar **)&hold_domains, 0,
6513 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE,
6519 addr->message = US"hold_domains lookup deferred";
6520 addr->basic_errno = ERRNO_LISTDEFER;
6524 addr->message = US"domain is held";
6525 addr->basic_errno = ERRNO_HELD;
6527 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_NONE, 0);
6531 /* Now we can check for duplicates and previously delivered addresses. In
6532 order to do this, we have to generate a "unique" value for each address,
6533 because there may be identical actual addresses in a line of descendents.
6534 The "unique" field is initialized to the same value as the "address" field,
6535 but gets changed here to cope with identically-named descendents. */
6537 for (parent = addr->parent; parent; parent = parent->parent)
6538 if (strcmpic(addr->address, parent->address) == 0) break;
6540 /* If there's an ancestor with the same name, set the homonym flag. This
6541 influences how deliveries are recorded. Then add a prefix on the front of
6542 the unique address. We use \n\ where n starts at 0 and increases each time.
6543 It is unlikely to pass 9, but if it does, it may look odd but will still
6544 work. This means that siblings or cousins with the same names are treated
6545 as duplicates, which is what we want. */
6549 setflag(addr, af_homonym);
6550 if (parent->unique[0] != '\\')
6551 addr->unique = string_sprintf("\\0\\%s", addr->address);
6553 addr->unique = string_sprintf("\\%c\\%s", parent->unique[1] + 1,
6557 /* Ensure that the domain in the unique field is lower cased, because
6558 domains are always handled caselessly. */
6560 p = Ustrrchr(addr->unique, '@');
6561 while (*p != 0) { *p = tolower(*p); p++; }
6563 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
6565 if (tree_search(tree_nonrecipients, addr->unique))
6567 DEBUG(D_deliver|D_route)
6568 debug_printf("%s was previously delivered: discarded\n", addr->unique);
6569 child_done(addr, tod_stamp(tod_log));
6573 /* Get the routing retry status, saving the two retry keys (with and
6574 without the local part) for subsequent use. If there is no retry record for
6575 the standard address routing retry key, we look for the same key with the
6576 sender attached, because this form is used by the smtp transport after a
6577 4xx response to RCPT when address_retry_include_sender is true. */
6579 addr->domain_retry_key = string_sprintf("R:%s", addr->domain);
6580 addr->address_retry_key = string_sprintf("R:%s@%s", addr->local_part,
6585 domain_retry_record = dbfn_read(dbm_file, addr->domain_retry_key);
6586 if ( domain_retry_record
6587 && now - domain_retry_record->time_stamp > retry_data_expire
6589 domain_retry_record = NULL; /* Ignore if too old */
6591 address_retry_record = dbfn_read(dbm_file, addr->address_retry_key);
6592 if ( address_retry_record
6593 && now - address_retry_record->time_stamp > retry_data_expire
6595 address_retry_record = NULL; /* Ignore if too old */
6597 if (!address_retry_record)
6599 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
6601 address_retry_record = dbfn_read(dbm_file, altkey);
6602 if ( address_retry_record
6603 && now - address_retry_record->time_stamp > retry_data_expire)
6604 address_retry_record = NULL; /* Ignore if too old */
6608 domain_retry_record = address_retry_record = NULL;
6610 DEBUG(D_deliver|D_retry)
6612 if (!domain_retry_record)
6613 debug_printf("no domain retry record\n");
6614 if (!address_retry_record)
6615 debug_printf("no address retry record\n");
6618 /* If we are sending a message down an existing SMTP connection, we must
6619 assume that the message which created the connection managed to route
6620 an address to that connection. We do not want to run the risk of taking
6621 a long time over routing here, because if we do, the server at the other
6622 end of the connection may time it out. This is especially true for messages
6623 with lots of addresses. For this kind of delivery, queue_running is not
6624 set, so we would normally route all addresses. We take a pragmatic approach
6625 and defer routing any addresses that have any kind of domain retry record.
6626 That is, we don't even look at their retry times. It doesn't matter if this
6627 doesn't work occasionally. This is all just an optimization, after all.
6629 The reason for not doing the same for address retries is that they normally
6630 arise from 4xx responses, not DNS timeouts. */
6632 if (continue_hostname && domain_retry_record)
6634 addr->message = US"reusing SMTP connection skips previous routing defer";
6635 addr->basic_errno = ERRNO_RRETRY;
6636 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6639 /* If we are in a queue run, defer routing unless there is no retry data or
6640 we've passed the next retry time, or this message is forced. In other
6641 words, ignore retry data when not in a queue run.
6643 However, if the domain retry time has expired, always allow the routing
6644 attempt. If it fails again, the address will be failed. This ensures that
6645 each address is routed at least once, even after long-term routing
6648 If there is an address retry, check that too; just wait for the next
6649 retry time. This helps with the case when the temporary error on the
6650 address was really message-specific rather than address specific, since
6651 it allows other messages through.
6653 We also wait for the next retry time if this is a message sent down an
6654 existing SMTP connection (even though that will be forced). Otherwise there
6655 will be far too many attempts for an address that gets a 4xx error. In
6656 fact, after such an error, we should not get here because, the host should
6657 not be remembered as one this message needs. However, there was a bug that
6658 used to cause this to happen, so it is best to be on the safe side.
6660 Even if we haven't reached the retry time in the hints, there is one more
6661 check to do, which is for the ultimate address timeout. We only do this
6662 check if there is an address retry record and there is not a domain retry
6663 record; this implies that previous attempts to handle the address had the
6664 retry_use_local_parts option turned on. We use this as an approximation
6665 for the destination being like a local delivery, for example delivery over
6666 LMTP to an IMAP message store. In this situation users are liable to bump
6667 into their quota and thereby have intermittently successful deliveries,
6668 which keep the retry record fresh, which can lead to us perpetually
6669 deferring messages. */
6671 else if ( ( f.queue_running && !f.deliver_force
6672 || continue_hostname
6674 && ( ( domain_retry_record
6675 && now < domain_retry_record->next_try
6676 && !domain_retry_record->expired
6678 || ( address_retry_record
6679 && now < address_retry_record->next_try
6681 && ( domain_retry_record
6682 || !address_retry_record
6683 || !retry_ultimate_address_timeout(addr->address_retry_key,
6684 addr->domain, address_retry_record, now)
6687 addr->message = US"retry time not reached";
6688 addr->basic_errno = ERRNO_RRETRY;
6689 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6692 /* The domain is OK for routing. Remember if retry data exists so it
6693 can be cleaned up after a successful delivery. */
6697 if (domain_retry_record || address_retry_record)
6698 setflag(addr, af_dr_retry_exists);
6699 addr->next = addr_route;
6701 DEBUG(D_deliver|D_route)
6702 debug_printf("%s: queued for routing\n", addr->address);
6706 /* The database is closed while routing is actually happening. Requests to
6707 update it are put on a chain and all processed together at the end. */
6709 if (dbm_file) dbfn_close(dbm_file);
6711 /* If queue_domains is set, we don't even want to try routing addresses in
6712 those domains. During queue runs, queue_domains is forced to be unset.
6713 Optimize by skipping this pass through the addresses if nothing is set. */
6715 if (!f.deliver_force && queue_domains)
6717 address_item *okaddr = NULL;
6720 address_item *addr = addr_route;
6721 addr_route = addr->next;
6723 deliver_domain = addr->domain; /* set $domain */
6724 if ((rc = match_isinlist(addr->domain, (const uschar **)&queue_domains, 0,
6725 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
6729 addr->basic_errno = ERRNO_LISTDEFER;
6730 addr->message = US"queue_domains lookup deferred";
6731 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6735 addr->next = okaddr;
6740 addr->basic_errno = ERRNO_QUEUE_DOMAIN;
6741 addr->message = US"domain is in queue_domains";
6742 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6746 addr_route = okaddr;
6749 /* Now route those addresses that are not deferred. */
6754 address_item *addr = addr_route;
6755 const uschar *old_domain = addr->domain;
6756 uschar *old_unique = addr->unique;
6757 addr_route = addr->next;
6760 /* Just in case some router parameter refers to it. */
6762 if (!(return_path = addr->prop.errors_address))
6763 return_path = sender_address;
6765 /* If a router defers an address, add a retry item. Whether or not to
6766 use the local part in the key is a property of the router. */
6768 if ((rc = route_address(addr, &addr_local, &addr_remote, &addr_new,
6769 &addr_succeed, v_none)) == DEFER)
6770 retry_add_item(addr,
6771 addr->router->retry_use_local_part
6772 ? string_sprintf("R:%s@%s", addr->local_part, addr->domain)
6773 : string_sprintf("R:%s", addr->domain),
6776 /* Otherwise, if there is an existing retry record in the database, add
6777 retry items to delete both forms. We must also allow for the possibility
6778 of a routing retry that includes the sender address. Since the domain might
6779 have been rewritten (expanded to fully qualified) as a result of routing,
6780 ensure that the rewritten form is also deleted. */
6782 else if (testflag(addr, af_dr_retry_exists))
6784 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
6786 retry_add_item(addr, altkey, rf_delete);
6787 retry_add_item(addr, addr->address_retry_key, rf_delete);
6788 retry_add_item(addr, addr->domain_retry_key, rf_delete);
6789 if (Ustrcmp(addr->domain, old_domain) != 0)
6790 retry_add_item(addr, string_sprintf("R:%s", old_domain), rf_delete);
6793 /* DISCARD is given for :blackhole: and "seen finish". The event has been
6794 logged, but we need to ensure the address (and maybe parents) is marked
6799 address_done(addr, tod_stamp(tod_log));
6800 continue; /* route next address */
6803 /* The address is finished with (failed or deferred). */
6807 (void)post_process_one(addr, rc, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6808 continue; /* route next address */
6811 /* The address has been routed. If the router changed the domain, it will
6812 also have changed the unique address. We have to test whether this address
6813 has already been delivered, because it's the unique address that finally
6816 if ( addr->unique != old_unique
6817 && tree_search(tree_nonrecipients, addr->unique) != 0
6820 DEBUG(D_deliver|D_route) debug_printf("%s was previously delivered: "
6821 "discarded\n", addr->address);
6822 if (addr_remote == addr) addr_remote = addr->next;
6823 else if (addr_local == addr) addr_local = addr->next;
6826 /* If the router has same_domain_copy_routing set, we are permitted to copy
6827 the routing for any other addresses with the same domain. This is an
6828 optimisation to save repeated DNS lookups for "standard" remote domain
6829 routing. The option is settable only on routers that generate host lists.
6830 We play it very safe, and do the optimization only if the address is routed
6831 to a remote transport, there are no header changes, and the domain was not
6832 modified by the router. */
6834 if ( addr_remote == addr
6835 && addr->router->same_domain_copy_routing
6836 && !addr->prop.extra_headers
6837 && !addr->prop.remove_headers
6838 && old_domain == addr->domain
6841 address_item **chain = &addr_route;
6844 address_item *addr2 = *chain;
6845 if (Ustrcmp(addr2->domain, addr->domain) != 0)
6847 chain = &(addr2->next);
6851 /* Found a suitable address; take it off the routing list and add it to
6852 the remote delivery list. */
6854 *chain = addr2->next;
6855 addr2->next = addr_remote;
6856 addr_remote = addr2;
6858 /* Copy the routing data */
6860 addr2->domain = addr->domain;
6861 addr2->router = addr->router;
6862 addr2->transport = addr->transport;
6863 addr2->host_list = addr->host_list;
6864 addr2->fallback_hosts = addr->fallback_hosts;
6865 addr2->prop.errors_address = addr->prop.errors_address;
6866 copyflag(addr2, addr, af_hide_child);
6867 copyflag(addr2, addr, af_local_host_removed);
6869 DEBUG(D_deliver|D_route)
6870 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"
6872 "Routing for %s copied from %s\n",
6873 addr2->address, addr2->address, addr->address);
6876 } /* Continue with routing the next address. */
6877 } /* Loop to process any child addresses that the routers created, and
6878 any rerouted addresses that got put back on the new chain. */
6881 /* Debugging: show the results of the routing */
6883 DEBUG(D_deliver|D_retry|D_route)
6886 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
6887 debug_printf("After routing:\n Local deliveries:\n");
6888 for (p = addr_local; p; p = p->next)
6889 debug_printf(" %s\n", p->address);
6891 debug_printf(" Remote deliveries:\n");
6892 for (p = addr_remote; p; p = p->next)
6893 debug_printf(" %s\n", p->address);
6895 debug_printf(" Failed addresses:\n");
6896 for (p = addr_failed; p; p = p->next)
6897 debug_printf(" %s\n", p->address);
6899 debug_printf(" Deferred addresses:\n");
6900 for (p = addr_defer; p; p = p->next)
6901 debug_printf(" %s\n", p->address);
6904 /* Free any resources that were cached during routing. */
6909 /* These two variables are set only during routing, after check_local_user.
6910 Ensure they are not set in transports. */
6912 local_user_gid = (gid_t)(-1);
6913 local_user_uid = (uid_t)(-1);
6915 /* Check for any duplicate addresses. This check is delayed until after
6916 routing, because the flexibility of the routing configuration means that
6917 identical addresses with different parentage may end up being redirected to
6918 different addresses. Checking for duplicates too early (as we previously used
6919 to) makes this kind of thing not work. */
6921 do_duplicate_check(&addr_local);
6922 do_duplicate_check(&addr_remote);
6924 /* When acting as an MUA wrapper, we proceed only if all addresses route to a
6925 remote transport. The check that they all end up in one transaction happens in
6926 the do_remote_deliveries() function. */
6929 && (addr_local || addr_failed || addr_defer)
6933 uschar *which, *colon, *msg;
6940 else if (addr_defer)
6943 which = US"deferred";
6951 while (addr->parent) addr = addr->parent;
6956 msg = addr->message;
6958 else colon = msg = US"";
6960 /* We don't need to log here for a forced failure as it will already
6961 have been logged. Defer will also have been logged, but as a defer, so we do
6962 need to do the failure logging. */
6964 if (addr != addr_failed)
6965 log_write(0, LOG_MAIN, "** %s routing yielded a %s delivery",
6966 addr->address, which);
6968 /* Always write an error to the caller */
6970 fprintf(stderr, "routing %s yielded a %s delivery%s%s\n", addr->address,
6973 final_yield = DELIVER_MUA_FAILED;
6974 addr_failed = addr_defer = NULL; /* So that we remove the message */
6975 goto DELIVERY_TIDYUP;
6979 /* If this is a run to continue deliveries to an external channel that is
6980 already set up, defer any local deliveries. */
6982 if (continue_transport)
6986 address_item *addr = addr_defer;
6987 while (addr->next) addr = addr->next;
6988 addr->next = addr_local;
6991 addr_defer = addr_local;
6996 /* Because address rewriting can happen in the routers, we should not really do
6997 ANY deliveries until all addresses have been routed, so that all recipients of
6998 the message get the same headers. However, this is in practice not always
6999 possible, since sometimes remote addresses give DNS timeouts for days on end.
7000 The pragmatic approach is to deliver what we can now, saving any rewritten
7001 headers so that at least the next lot of recipients benefit from the rewriting
7002 that has already been done.
7004 If any headers have been rewritten during routing, update the spool file to
7005 remember them for all subsequent deliveries. This can be delayed till later if
7006 there is only address to be delivered - if it succeeds the spool write need not
7009 if ( f.header_rewritten
7010 && ( addr_local && (addr_local->next || addr_remote)
7011 || addr_remote && addr_remote->next
7014 /* Panic-dies on error */
7015 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7016 f.header_rewritten = FALSE;
7020 /* If there are any deliveries to be and we do not already have the journal
7021 file, create it. This is used to record successful deliveries as soon as
7022 possible after each delivery is known to be complete. A file opened with
7023 O_APPEND is used so that several processes can run simultaneously.
7025 The journal is just insurance against crashes. When the spool file is
7026 ultimately updated at the end of processing, the journal is deleted. If a
7027 journal is found to exist at the start of delivery, the addresses listed
7028 therein are added to the non-recipients. */
7030 if (addr_local || addr_remote)
7034 uschar * fname = spool_fname(US"input", message_subdir, id, US"-J");
7036 if ((journal_fd = Uopen(fname,
7040 O_WRONLY|O_APPEND|O_CREAT|O_EXCL, SPOOL_MODE)) < 0)
7042 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't open journal file %s: %s",
7043 fname, strerror(errno));
7044 return DELIVER_NOT_ATTEMPTED;
7047 /* Set the close-on-exec flag, make the file owned by Exim, and ensure
7048 that the mode is correct - the group setting doesn't always seem to get
7049 set automatically. */
7051 if( fchown(journal_fd, exim_uid, exim_gid)
7052 || fchmod(journal_fd, SPOOL_MODE)
7054 || fcntl(journal_fd, F_SETFD, fcntl(journal_fd, F_GETFD) | FD_CLOEXEC)
7058 int ret = Uunlink(fname);
7059 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't set perms on journal file %s: %s",
7060 fname, strerror(errno));
7061 if(ret && errno != ENOENT)
7062 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7063 fname, strerror(errno));
7064 return DELIVER_NOT_ATTEMPTED;
7068 else if (journal_fd >= 0)
7076 /* Now we can get down to the business of actually doing deliveries. Local
7077 deliveries are done first, then remote ones. If ever the problems of how to
7078 handle fallback transports are figured out, this section can be put into a loop
7079 for handling fallbacks, though the uid switching will have to be revised. */
7081 /* Precompile a regex that is used to recognize a parameter in response
7082 to an LHLO command, if is isn't already compiled. This may be used on both
7083 local and remote LMTP deliveries. */
7085 if (!regex_IGNOREQUOTA)
7087 regex_must_compile(US"\\n250[\\s\\-]IGNOREQUOTA(\\s|\\n|$)", FALSE, TRUE);
7089 /* Handle local deliveries */
7093 DEBUG(D_deliver|D_transport)
7094 debug_printf(">>>>>>>>>>>>>>>> Local deliveries >>>>>>>>>>>>>>>>\n");
7095 do_local_deliveries();
7096 f.disable_logging = FALSE;
7099 /* If queue_run_local is set, we do not want to attempt any remote deliveries,
7100 so just queue them all. */
7102 if (f.queue_run_local)
7105 address_item *addr = addr_remote;
7106 addr_remote = addr->next;
7108 addr->basic_errno = ERRNO_LOCAL_ONLY;
7109 addr->message = US"remote deliveries suppressed";
7110 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_TRANSPORT, 0);
7113 /* Handle remote deliveries */
7117 DEBUG(D_deliver|D_transport)
7118 debug_printf(">>>>>>>>>>>>>>>> Remote deliveries >>>>>>>>>>>>>>>>\n");
7120 /* Precompile some regex that are used to recognize parameters in response
7121 to an EHLO command, if they aren't already compiled. */
7125 /* Now sort the addresses if required, and do the deliveries. The yield of
7126 do_remote_deliveries is FALSE when mua_wrapper is set and all addresses
7127 cannot be delivered in one transaction. */
7129 if (remote_sort_domains) sort_remote_deliveries();
7130 if (!do_remote_deliveries(FALSE))
7132 log_write(0, LOG_MAIN, "** mua_wrapper is set but recipients cannot all "
7133 "be delivered in one transaction");
7134 fprintf(stderr, "delivery to smarthost failed (configuration problem)\n");
7136 final_yield = DELIVER_MUA_FAILED;
7137 addr_failed = addr_defer = NULL; /* So that we remove the message */
7138 goto DELIVERY_TIDYUP;
7141 /* See if any of the addresses that failed got put on the queue for delivery
7142 to their fallback hosts. We do it this way because often the same fallback
7143 host is used for many domains, so all can be sent in a single transaction
7144 (if appropriately configured). */
7146 if (addr_fallback && !mua_wrapper)
7148 DEBUG(D_deliver) debug_printf("Delivering to fallback hosts\n");
7149 addr_remote = addr_fallback;
7150 addr_fallback = NULL;
7151 if (remote_sort_domains) sort_remote_deliveries();
7152 do_remote_deliveries(TRUE);
7154 f.disable_logging = FALSE;
7158 /* All deliveries are now complete. Ignore SIGTERM during this tidying up
7159 phase, to minimize cases of half-done things. */
7162 debug_printf(">>>>>>>>>>>>>>>> deliveries are done >>>>>>>>>>>>>>>>\n");
7163 cancel_cutthrough_connection(TRUE, US"deliveries are done");
7165 /* Root privilege is no longer needed */
7167 exim_setugid(exim_uid, exim_gid, FALSE, US"post-delivery tidying");
7169 set_process_info("tidying up after delivering %s", message_id);
7170 signal(SIGTERM, SIG_IGN);
7172 /* When we are acting as an MUA wrapper, the smtp transport will either have
7173 succeeded for all addresses, or failed them all in normal cases. However, there
7174 are some setup situations (e.g. when a named port does not exist) that cause an
7175 immediate exit with deferral of all addresses. Convert those into failures. We
7176 do not ever want to retry, nor do we want to send a bounce message. */
7182 address_item *addr, *nextaddr;
7183 for (addr = addr_defer; addr; addr = nextaddr)
7185 log_write(0, LOG_MAIN, "** %s mua_wrapper forced failure for deferred "
7186 "delivery", addr->address);
7187 nextaddr = addr->next;
7188 addr->next = addr_failed;
7194 /* Now all should either have succeeded or failed. */
7197 final_yield = DELIVER_MUA_SUCCEEDED;
7201 uschar *s = addr_failed->user_message;
7203 if (!s) s = addr_failed->message;
7205 fprintf(stderr, "Delivery failed: ");
7206 if (addr_failed->basic_errno > 0)
7208 fprintf(stderr, "%s", strerror(addr_failed->basic_errno));
7209 if (s) fprintf(stderr, ": ");
7211 if ((host = addr_failed->host_used))
7212 fprintf(stderr, "H=%s [%s]: ", host->name, host->address);
7214 fprintf(stderr, "%s", CS s);
7215 else if (addr_failed->basic_errno <= 0)
7216 fprintf(stderr, "unknown error");
7217 fprintf(stderr, "\n");
7219 final_yield = DELIVER_MUA_FAILED;
7224 /* In a normal configuration, we now update the retry database. This is done in
7225 one fell swoop at the end in order not to keep opening and closing (and
7226 locking) the database. The code for handling retries is hived off into a
7227 separate module for convenience. We pass it the addresses of the various
7228 chains, because deferred addresses can get moved onto the failed chain if the
7229 retry cutoff time has expired for all alternative destinations. Bypass the
7230 updating of the database if the -N flag is set, which is a debugging thing that
7231 prevents actual delivery. */
7233 else if (!f.dont_deliver)
7234 retry_update(&addr_defer, &addr_failed, &addr_succeed);
7236 /* Send DSN for successful messages if requested */
7237 addr_senddsn = NULL;
7239 for (addr_dsntmp = addr_succeed; addr_dsntmp; addr_dsntmp = addr_dsntmp->next)
7241 /* af_ignore_error not honored here. it's not an error */
7242 DEBUG(D_deliver) debug_printf("DSN: processing router : %s\n"
7243 "DSN: processing successful delivery address: %s\n"
7244 "DSN: Sender_address: %s\n"
7245 "DSN: orcpt: %s flags: %d\n"
7246 "DSN: envid: %s ret: %d\n"
7247 "DSN: Final recipient: %s\n"
7248 "DSN: Remote SMTP server supports DSN: %d\n",
7249 addr_dsntmp->router ? addr_dsntmp->router->name : US"(unknown)",
7250 addr_dsntmp->address,
7252 addr_dsntmp->dsn_orcpt ? addr_dsntmp->dsn_orcpt : US"NULL",
7253 addr_dsntmp->dsn_flags,
7254 dsn_envid ? dsn_envid : US"NULL", dsn_ret,
7255 addr_dsntmp->address,
7256 addr_dsntmp->dsn_aware
7259 /* send report if next hop not DSN aware or a router flagged "last DSN hop"
7260 and a report was requested */
7261 if ( ( addr_dsntmp->dsn_aware != dsn_support_yes
7262 || addr_dsntmp->dsn_flags & rf_dsnlasthop
7264 && addr_dsntmp->dsn_flags & rf_notify_success
7267 /* copy and relink address_item and send report with all of them at once later */
7268 address_item * addr_next = addr_senddsn;
7269 addr_senddsn = store_get(sizeof(address_item));
7270 *addr_senddsn = *addr_dsntmp;
7271 addr_senddsn->next = addr_next;
7274 DEBUG(D_deliver) debug_printf("DSN: not sending DSN success message\n");
7282 /* create exim process to send message */
7283 pid = child_open_exim(&fd);
7285 DEBUG(D_deliver) debug_printf("DSN: child_open_exim returns: %d\n", pid);
7287 if (pid < 0) /* Creation of child failed */
7289 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to "
7290 "create child process to send failure message: %s", getpid(),
7291 getppid(), strerror(errno));
7293 DEBUG(D_deliver) debug_printf("DSN: child_open_exim failed\n");
7295 else /* Creation of child succeeded */
7297 FILE *f = fdopen(fd, "wb");
7298 /* header only as required by RFC. only failure DSN needs to honor RET=FULL */
7300 transport_ctx tctx = {{0}};
7303 debug_printf("sending error message to: %s\n", sender_address);
7305 /* build unique id for MIME boundary */
7306 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
7307 DEBUG(D_deliver) debug_printf("DSN: MIME boundary: %s\n", bound);
7309 if (errors_reply_to)
7310 fprintf(f, "Reply-To: %s\n", errors_reply_to);
7312 fprintf(f, "Auto-Submitted: auto-generated\n"
7313 "From: Mail Delivery System <Mailer-Daemon@%s>\n"
7315 "Subject: Delivery Status Notification\n"
7316 "Content-Type: multipart/report; report-type=delivery-status; boundary=%s\n"
7317 "MIME-Version: 1.0\n\n"
7320 "Content-type: text/plain; charset=us-ascii\n\n"
7322 "This message was created automatically by mail delivery software.\n"
7323 " ----- The following addresses had successful delivery notifications -----\n",
7324 qualify_domain_sender, sender_address, bound, bound);
7326 for (addr_dsntmp = addr_senddsn; addr_dsntmp;
7327 addr_dsntmp = addr_dsntmp->next)
7328 fprintf(f, "<%s> (relayed %s)\n\n",
7329 addr_dsntmp->address,
7330 addr_dsntmp->dsn_flags & rf_dsnlasthop ? "via non DSN router"
7331 : addr_dsntmp->dsn_aware == dsn_support_no ? "to non-DSN-aware mailer"
7332 : "via non \"Remote SMTP\" router"
7336 "Content-type: message/delivery-status\n\n"
7337 "Reporting-MTA: dns; %s\n",
7338 bound, smtp_active_hostname);
7341 { /* must be decoded from xtext: see RFC 3461:6.3a */
7343 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
7344 fprintf(f, "Original-Envelope-ID: %s\n", dsn_envid);
7346 fprintf(f, "X-Original-Envelope-ID: error decoding xtext formatted ENVID\n");
7350 for (addr_dsntmp = addr_senddsn;
7352 addr_dsntmp = addr_dsntmp->next)
7354 if (addr_dsntmp->dsn_orcpt)
7355 fprintf(f,"Original-Recipient: %s\n", addr_dsntmp->dsn_orcpt);
7357 fprintf(f, "Action: delivered\n"
7358 "Final-Recipient: rfc822;%s\n"
7360 addr_dsntmp->address);
7362 if (addr_dsntmp->host_used && addr_dsntmp->host_used->name)
7363 fprintf(f, "Remote-MTA: dns; %s\nDiagnostic-Code: smtp; 250 Ok\n\n",
7364 addr_dsntmp->host_used->name);
7366 fprintf(f, "Diagnostic-Code: X-Exim; relayed via non %s router\n\n",
7367 addr_dsntmp->dsn_flags & rf_dsnlasthop ? "DSN" : "SMTP");
7370 fprintf(f, "--%s\nContent-type: text/rfc822-headers\n\n", bound);
7373 transport_filter_argv = NULL; /* Just in case */
7374 return_path = sender_address; /* In case not previously set */
7376 /* Write the original email out */
7378 tctx.u.fd = fileno(f);
7379 tctx.options = topt_add_return_path | topt_no_body;
7380 transport_write_message(&tctx, 0);
7383 fprintf(f,"\n--%s--\n", bound);
7387 rc = child_close(pid, 0); /* Waits for child to close, no timeout */
7391 /* If any addresses failed, we must send a message to somebody, unless
7392 af_ignore_error is set, in which case no action is taken. It is possible for
7393 several messages to get sent if there are addresses with different
7400 uschar *logtod = tod_stamp(tod_log);
7402 address_item *handled_addr = NULL;
7403 address_item **paddr;
7404 address_item *msgchain = NULL;
7405 address_item **pmsgchain = &msgchain;
7407 /* There are weird cases when logging is disabled in the transport. However,
7408 there may not be a transport (address failed by a router). */
7410 f.disable_logging = FALSE;
7411 if (addr_failed->transport)
7412 f.disable_logging = addr_failed->transport->disable_logging;
7415 debug_printf("processing failed address %s\n", addr_failed->address);
7417 /* There are only two ways an address in a bounce message can get here:
7419 (1) When delivery was initially deferred, but has now timed out (in the call
7420 to retry_update() above). We can detect this by testing for
7421 af_retry_timedout. If the address does not have its own errors address,
7422 we arrange to ignore the error.
7424 (2) If delivery failures for bounce messages are being ignored. We can detect
7425 this by testing for af_ignore_error. This will also be set if a bounce
7426 message has been autothawed and the ignore_bounce_errors_after time has
7427 passed. It might also be set if a router was explicitly configured to
7428 ignore errors (errors_to = "").
7430 If neither of these cases obtains, something has gone wrong. Log the
7431 incident, but then ignore the error. */
7433 if (sender_address[0] == 0 && !addr_failed->prop.errors_address)
7435 if ( !testflag(addr_failed, af_retry_timedout)
7436 && !addr_failed->prop.ignore_error)
7437 log_write(0, LOG_MAIN|LOG_PANIC, "internal error: bounce message "
7438 "failure is neither frozen nor ignored (it's been ignored)");
7440 addr_failed->prop.ignore_error = TRUE;
7443 /* If the first address on the list has af_ignore_error set, just remove
7444 it from the list, throw away any saved message file, log it, and
7445 mark the recipient done. */
7447 if ( addr_failed->prop.ignore_error
7448 || addr_failed->dsn_flags & (rf_dsnflags & ~rf_notify_failure)
7452 addr_failed = addr->next;
7453 if (addr->return_filename) Uunlink(addr->return_filename);
7455 #ifndef DISABLE_EVENT
7456 msg_event_raise(US"msg:fail:delivery", addr);
7458 log_write(0, LOG_MAIN, "%s%s%s%s: error ignored",
7460 !addr->parent ? US"" : US" <",
7461 !addr->parent ? US"" : addr->parent->address,
7462 !addr->parent ? US"" : US">");
7464 address_done(addr, logtod);
7465 child_done(addr, logtod);
7466 /* Panic-dies on error */
7467 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7470 /* Otherwise, handle the sending of a message. Find the error address for
7471 the first address, then send a message that includes all failed addresses
7472 that have the same error address. Note the bounce_recipient is a global so
7473 that it can be accessed by $bounce_recipient while creating a customized
7478 if (!(bounce_recipient = addr_failed->prop.errors_address))
7479 bounce_recipient = sender_address;
7481 /* Make a subprocess to send a message */
7483 if ((pid = child_open_exim(&fd)) < 0)
7484 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to "
7485 "create child process to send failure message: %s", getpid(),
7486 getppid(), strerror(errno));
7488 /* Creation of child succeeded */
7495 uschar *bcc, *emf_text;
7496 FILE * fp = fdopen(fd, "wb");
7498 BOOL to_sender = strcmpic(sender_address, bounce_recipient) == 0;
7499 int max = (bounce_return_size_limit/DELIVER_IN_BUFFER_SIZE + 1) *
7500 DELIVER_IN_BUFFER_SIZE;
7502 uschar *dsnlimitmsg;
7503 uschar *dsnnotifyhdr;
7507 debug_printf("sending error message to: %s\n", bounce_recipient);
7509 /* Scan the addresses for all that have the same errors address, removing
7510 them from the addr_failed chain, and putting them on msgchain. */
7512 paddr = &addr_failed;
7513 for (addr = addr_failed; addr; addr = *paddr)
7514 if (Ustrcmp(bounce_recipient, addr->prop.errors_address
7515 ? addr->prop.errors_address : sender_address) == 0)
7516 { /* The same - dechain */
7517 *paddr = addr->next;
7520 pmsgchain = &(addr->next);
7523 paddr = &addr->next; /* Not the same; skip */
7525 /* Include X-Failed-Recipients: for automatic interpretation, but do
7526 not let any one header line get too long. We do this by starting a
7527 new header every 50 recipients. Omit any addresses for which the
7528 "hide_child" flag is set. */
7530 for (addr = msgchain; addr; addr = addr->next)
7532 if (testflag(addr, af_hide_child)) continue;
7540 ? "X-Failed-Recipients: "
7542 testflag(addr, af_pfr) && addr->parent
7543 ? string_printing(addr->parent->address)
7544 : string_printing(addr->address));
7546 if (rcount > 0) fprintf(fp, "\n");
7548 /* Output the standard headers */
7550 if (errors_reply_to)
7551 fprintf(fp, "Reply-To: %s\n", errors_reply_to);
7552 fprintf(fp, "Auto-Submitted: auto-replied\n");
7553 moan_write_from(fp);
7554 fprintf(fp, "To: %s\n", bounce_recipient);
7556 /* generate boundary string and output MIME-Headers */
7557 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
7559 fprintf(fp, "Content-Type: multipart/report;"
7560 " report-type=delivery-status; boundary=%s\n"
7561 "MIME-Version: 1.0\n",
7564 /* Open a template file if one is provided. Log failure to open, but
7565 carry on - default texts will be used. */
7567 if (bounce_message_file)
7568 if (!(emf = Ufopen(bounce_message_file, "rb")))
7569 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for error "
7570 "message texts: %s", bounce_message_file, strerror(errno));
7572 /* Quietly copy to configured additional addresses if required. */
7574 if ((bcc = moan_check_errorcopy(bounce_recipient)))
7575 fprintf(fp, "Bcc: %s\n", bcc);
7577 /* The texts for the message can be read from a template file; if there
7578 isn't one, or if it is too short, built-in texts are used. The first
7579 emf text is a Subject: and any other headers. */
7581 if ((emf_text = next_emf(emf, US"header")))
7582 fprintf(fp, "%s\n", emf_text);
7584 fprintf(fp, "Subject: Mail delivery failed%s\n\n",
7585 to_sender? ": returning message to sender" : "");
7587 /* output human readable part as text/plain section */
7588 fprintf(fp, "--%s\n"
7589 "Content-type: text/plain; charset=us-ascii\n\n",
7592 if ((emf_text = next_emf(emf, US"intro")))
7593 fprintf(fp, "%s", CS emf_text);
7597 /* This message has been reworded several times. It seems to be confusing to
7598 somebody, however it is worded. I have retreated to the original, simple
7600 "This message was created automatically by mail delivery software.\n");
7602 if (bounce_message_text)
7603 fprintf(fp, "%s", CS bounce_message_text);
7606 "\nA message that you sent could not be delivered to one or more of its\n"
7607 "recipients. This is a permanent error. The following address(es) failed:\n");
7610 "\nA message sent by\n\n <%s>\n\n"
7611 "could not be delivered to one or more of its recipients. The following\n"
7612 "address(es) failed:\n", sender_address);
7616 /* Process the addresses, leaving them on the msgchain if they have a
7617 file name for a return message. (There has already been a check in
7618 post_process_one() for the existence of data in the message file.) A TRUE
7619 return from print_address_information() means that the address is not
7623 for (addr = msgchain; addr; addr = *paddr)
7625 if (print_address_information(addr, fp, US" ", US"\n ", US""))
7626 print_address_error(addr, fp, US"");
7628 /* End the final line for the address */
7632 /* Leave on msgchain if there's a return file. */
7634 if (addr->return_file >= 0)
7636 paddr = &(addr->next);
7640 /* Else save so that we can tick off the recipient when the
7645 *paddr = addr->next;
7646 addr->next = handled_addr;
7647 handled_addr = addr;
7653 /* Get the next text, whether we need it or not, so as to be
7654 positioned for the one after. */
7656 emf_text = next_emf(emf, US"generated text");
7658 /* If there were any file messages passed by the local transports,
7659 include them in the message. Then put the address on the handled chain.
7660 In the case of a batch of addresses that were all sent to the same
7661 transport, the return_file field in all of them will contain the same
7662 fd, and the return_filename field in the *last* one will be set (to the
7663 name of the file). */
7667 address_item *nextaddr;
7670 fprintf(fp, "%s", CS emf_text);
7673 "The following text was generated during the delivery "
7674 "attempt%s:\n", (filecount > 1)? "s" : "");
7676 for (addr = msgchain; addr; addr = nextaddr)
7679 address_item *topaddr = addr;
7681 /* List all the addresses that relate to this file */
7684 while(addr) /* Insurance */
7686 print_address_information(addr, fp, US"------ ", US"\n ",
7688 if (addr->return_filename) break;
7693 /* Now copy the file */
7695 if (!(fm = Ufopen(addr->return_filename, "rb")))
7696 fprintf(fp, " +++ Exim error... failed to open text file: %s\n",
7700 while ((ch = fgetc(fm)) != EOF) fputc(ch, fp);
7703 Uunlink(addr->return_filename);
7705 /* Can now add to handled chain, first fishing off the next
7706 address on the msgchain. */
7708 nextaddr = addr->next;
7709 addr->next = handled_addr;
7710 handled_addr = topaddr;
7715 /* output machine readable part */
7717 if (message_smtputf8)
7718 fprintf(fp, "--%s\n"
7719 "Content-type: message/global-delivery-status\n\n"
7720 "Reporting-MTA: dns; %s\n",
7721 bound, smtp_active_hostname);
7724 fprintf(fp, "--%s\n"
7725 "Content-type: message/delivery-status\n\n"
7726 "Reporting-MTA: dns; %s\n",
7727 bound, smtp_active_hostname);
7731 /* must be decoded from xtext: see RFC 3461:6.3a */
7733 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
7734 fprintf(fp, "Original-Envelope-ID: %s\n", dsn_envid);
7736 fprintf(fp, "X-Original-Envelope-ID: error decoding xtext formatted ENVID\n");
7740 for (addr = handled_addr; addr; addr = addr->next)
7743 fprintf(fp, "Action: failed\n"
7744 "Final-Recipient: rfc822;%s\n"
7747 if ((hu = addr->host_used) && hu->name)
7749 fprintf(fp, "Remote-MTA: dns; %s\n", hu->name);
7750 #ifdef EXPERIMENTAL_DSN_INFO
7755 uschar * p = hu->port == 25
7756 ? US"" : string_sprintf(":%d", hu->port);
7757 fprintf(fp, "Remote-MTA: X-ip; [%s]%s\n", hu->address, p);
7759 if ((s = addr->smtp_greeting) && *s)
7760 fprintf(fp, "X-Remote-MTA-smtp-greeting: X-str; %s\n", s);
7761 if ((s = addr->helo_response) && *s)
7762 fprintf(fp, "X-Remote-MTA-helo-response: X-str; %s\n", s);
7763 if ((s = addr->message) && *s)
7764 fprintf(fp, "X-Exim-Diagnostic: X-str; %s\n", s);
7767 print_dsn_diagnostic_code(addr, fp);
7772 /* Now copy the message, trying to give an intelligible comment if
7773 it is too long for it all to be copied. The limit isn't strictly
7774 applied because of the buffering. There is, however, an option
7775 to suppress copying altogether. */
7777 emf_text = next_emf(emf, US"copy");
7780 we ignore the intro text from template and add
7781 the text for bounce_return_size_limit at the end.
7783 bounce_return_message is ignored
7784 in case RET= is defined we honor these values
7785 otherwise bounce_return_body is honored.
7787 bounce_return_size_limit is always honored.
7790 fprintf(fp, "--%s\n", bound);
7792 dsnlimitmsg = US"X-Exim-DSN-Information: Due to administrative limits only headers are returned";
7793 dsnnotifyhdr = NULL;
7794 topt = topt_add_return_path;
7796 /* RET=HDRS? top priority */
7797 if (dsn_ret == dsn_ret_hdrs)
7798 topt |= topt_no_body;
7801 struct stat statbuf;
7803 /* no full body return at all? */
7804 if (!bounce_return_body)
7806 topt |= topt_no_body;
7807 /* add header if we overrule RET=FULL */
7808 if (dsn_ret == dsn_ret_full)
7809 dsnnotifyhdr = dsnlimitmsg;
7811 /* line length limited... return headers only if oversize */
7812 /* size limited ... return headers only if limit reached */
7813 else if ( max_received_linelength > bounce_return_linesize_limit
7814 || ( bounce_return_size_limit > 0
7815 && fstat(deliver_datafile, &statbuf) == 0
7816 && statbuf.st_size > max
7819 topt |= topt_no_body;
7820 dsnnotifyhdr = dsnlimitmsg;
7825 if (message_smtputf8)
7826 fputs(topt & topt_no_body ? "Content-type: message/global-headers\n\n"
7827 : "Content-type: message/global\n\n",
7831 fputs(topt & topt_no_body ? "Content-type: text/rfc822-headers\n\n"
7832 : "Content-type: message/rfc822\n\n",
7836 transport_filter_argv = NULL; /* Just in case */
7837 return_path = sender_address; /* In case not previously set */
7838 { /* Dummy transport for headers add */
7839 transport_ctx tctx = {{0}};
7840 transport_instance tb = {0};
7842 tctx.u.fd = fileno(fp);
7844 tctx.options = topt;
7845 tb.add_headers = dsnnotifyhdr;
7847 transport_write_message(&tctx, 0);
7851 /* we never add the final text. close the file */
7855 fprintf(fp, "\n--%s--\n", bound);
7857 /* Close the file, which should send an EOF to the child process
7858 that is receiving the message. Wait for it to finish. */
7861 rc = child_close(pid, 0); /* Waits for child to close, no timeout */
7863 /* In the test harness, let the child do it's thing first. */
7865 if (f.running_in_test_harness) millisleep(500);
7867 /* If the process failed, there was some disaster in setting up the
7868 error message. Unless the message is very old, ensure that addr_defer
7869 is non-null, which will have the effect of leaving the message on the
7870 spool. The failed addresses will get tried again next time. However, we
7871 don't really want this to happen too often, so freeze the message unless
7872 there are some genuine deferred addresses to try. To do this we have
7873 to call spool_write_header() here, because with no genuine deferred
7874 addresses the normal code below doesn't get run. */
7879 if (now - received_time.tv_sec < retry_maximum_timeout && !addr_defer)
7881 addr_defer = (address_item *)(+1);
7882 f.deliver_freeze = TRUE;
7883 deliver_frozen_at = time(NULL);
7884 /* Panic-dies on error */
7885 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7888 deliver_msglog("Process failed (%d) when writing error message "
7889 "to %s%s", rc, bounce_recipient, s);
7890 log_write(0, LOG_MAIN, "Process failed (%d) when writing error message "
7891 "to %s%s", rc, bounce_recipient, s);
7894 /* The message succeeded. Ensure that the recipients that failed are
7895 now marked finished with on the spool and their parents updated. */
7899 for (addr = handled_addr; addr; addr = addr->next)
7901 address_done(addr, logtod);
7902 child_done(addr, logtod);
7904 /* Panic-dies on error */
7905 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7911 f.disable_logging = FALSE; /* In case left set */
7913 /* Come here from the mua_wrapper case if routing goes wrong */
7917 /* If there are now no deferred addresses, we are done. Preserve the
7918 message log if so configured, and we are using them. Otherwise, sling it.
7919 Then delete the message itself. */
7927 fname = spool_fname(US"msglog", message_subdir, id, US"");
7928 if (preserve_message_logs)
7931 uschar * moname = spool_fname(US"msglog.OLD", US"", id, US"");
7933 if ((rc = Urename(fname, moname)) < 0)
7935 (void)directory_make(spool_directory,
7936 spool_sname(US"msglog.OLD", US""),
7937 MSGLOG_DIRECTORY_MODE, TRUE);
7938 rc = Urename(fname, moname);
7941 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to move %s to the "
7942 "msglog.OLD directory", fname);
7945 if (Uunlink(fname) < 0)
7946 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7947 fname, strerror(errno));
7950 /* Remove the two message files. */
7952 fname = spool_fname(US"input", message_subdir, id, US"-D");
7953 if (Uunlink(fname) < 0)
7954 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7955 fname, strerror(errno));
7956 fname = spool_fname(US"input", message_subdir, id, US"-H");
7957 if (Uunlink(fname) < 0)
7958 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7959 fname, strerror(errno));
7961 /* Log the end of this message, with queue time if requested. */
7963 if (LOGGING(queue_time_overall))
7964 log_write(0, LOG_MAIN, "Completed QT=%s", string_timesince(&received_time));
7966 log_write(0, LOG_MAIN, "Completed");
7968 /* Unset deliver_freeze so that we won't try to move the spool files further down */
7969 f.deliver_freeze = FALSE;
7971 #ifndef DISABLE_EVENT
7972 (void) event_raise(event_action, US"msg:complete", NULL);
7976 /* If there are deferred addresses, we are keeping this message because it is
7977 not yet completed. Lose any temporary files that were catching output from
7978 pipes for any of the deferred addresses, handle one-time aliases, and see if
7979 the message has been on the queue for so long that it is time to send a warning
7980 message to the sender, unless it is a mailer-daemon. If all deferred addresses
7981 have the same domain, we can set deliver_domain for the expansion of
7982 delay_warning_ condition - if any of them are pipes, files, or autoreplies, use
7983 the parent's domain.
7985 If all the deferred addresses have an error number that indicates "retry time
7986 not reached", skip sending the warning message, because it won't contain the
7987 reason for the delay. It will get sent at the next real delivery attempt.
7988 However, if at least one address has tried, we'd better include all of them in
7991 If we can't make a process to send the message, don't worry.
7993 For mailing list expansions we want to send the warning message to the
7994 mailing list manager. We can't do a perfect job here, as some addresses may
7995 have different errors addresses, but if we take the errors address from
7996 each deferred address it will probably be right in most cases.
7998 If addr_defer == +1, it means there was a problem sending an error message
7999 for failed addresses, and there were no "real" deferred addresses. The value
8000 was set just to keep the message on the spool, so there is nothing to do here.
8003 else if (addr_defer != (address_item *)(+1))
8006 uschar *recipients = US"";
8007 BOOL delivery_attempted = FALSE;
8009 deliver_domain = testflag(addr_defer, af_pfr)
8010 ? addr_defer->parent->domain : addr_defer->domain;
8012 for (addr = addr_defer; addr; addr = addr->next)
8014 address_item *otaddr;
8016 if (addr->basic_errno > ERRNO_RETRY_BASE) delivery_attempted = TRUE;
8020 const uschar *d = testflag(addr, af_pfr)
8021 ? addr->parent->domain : addr->domain;
8023 /* The domain may be unset for an address that has never been routed
8024 because the system filter froze the message. */
8026 if (!d || Ustrcmp(d, deliver_domain) != 0)
8027 deliver_domain = NULL;
8030 if (addr->return_filename) Uunlink(addr->return_filename);
8032 /* Handle the case of one-time aliases. If any address in the ancestry
8033 of this one is flagged, ensure it is in the recipients list, suitably
8034 flagged, and that its parent is marked delivered. */
8036 for (otaddr = addr; otaddr; otaddr = otaddr->parent)
8037 if (otaddr->onetime_parent) break;
8042 int t = recipients_count;
8044 for (i = 0; i < recipients_count; i++)
8046 uschar *r = recipients_list[i].address;
8047 if (Ustrcmp(otaddr->onetime_parent, r) == 0) t = i;
8048 if (Ustrcmp(otaddr->address, r) == 0) break;
8051 /* Didn't find the address already in the list, and did find the
8052 ultimate parent's address in the list, and they really are different
8053 (i.e. not from an identity-redirect). After adding the recipient,
8054 update the errors address in the recipients list. */
8056 if ( i >= recipients_count && t < recipients_count
8057 && Ustrcmp(otaddr->address, otaddr->parent->address) != 0)
8059 DEBUG(D_deliver) debug_printf("one_time: adding %s in place of %s\n",
8060 otaddr->address, otaddr->parent->address);
8061 receive_add_recipient(otaddr->address, t);
8062 recipients_list[recipients_count-1].errors_to = otaddr->prop.errors_address;
8063 tree_add_nonrecipient(otaddr->parent->address);
8064 update_spool = TRUE;
8068 /* Except for error messages, ensure that either the errors address for
8069 this deferred address or, if there is none, the sender address, is on the
8070 list of recipients for a warning message. */
8072 if (sender_address[0])
8074 uschar * s = addr->prop.errors_address;
8075 if (!s) s = sender_address;
8076 if (Ustrstr(recipients, s) == NULL)
8077 recipients = string_sprintf("%s%s%s", recipients,
8078 recipients[0] ? "," : "", s);
8082 /* Send a warning message if the conditions are right. If the condition check
8083 fails because of a lookup defer, there is nothing we can do. The warning
8084 is not sent. Another attempt will be made at the next delivery attempt (if
8087 if ( !f.queue_2stage
8088 && delivery_attempted
8089 && ( !(addr_defer->dsn_flags & rf_dsnflags)
8090 || addr_defer->dsn_flags & rf_notify_delay
8092 && delay_warning[1] > 0
8093 && sender_address[0] != 0
8094 && ( !delay_warning_condition
8095 || expand_check_condition(delay_warning_condition,
8096 US"delay_warning", US"option")
8102 int queue_time = time(NULL) - received_time.tv_sec;
8104 /* When running in the test harness, there's an option that allows us to
8105 fudge this time so as to get repeatability of the tests. Take the first
8106 time off the list. In queue runs, the list pointer gets updated in the
8109 if (f.running_in_test_harness && fudged_queue_times[0] != 0)
8111 int qt = readconf_readtime(fudged_queue_times, '/', FALSE);
8114 DEBUG(D_deliver) debug_printf("fudged queue_times = %s\n",
8115 fudged_queue_times);
8120 /* See how many warnings we should have sent by now */
8122 for (count = 0; count < delay_warning[1]; count++)
8123 if (queue_time < delay_warning[count+2]) break;
8125 show_time = delay_warning[count+1];
8127 if (count >= delay_warning[1])
8130 int last_gap = show_time;
8131 if (count > 1) last_gap -= delay_warning[count];
8132 extra = (queue_time - delay_warning[count+1])/last_gap;
8133 show_time += last_gap * extra;
8139 debug_printf("time on queue = %s\n", readconf_printtime(queue_time));
8140 debug_printf("warning counts: required %d done %d\n", count,
8144 /* We have computed the number of warnings there should have been by now.
8145 If there haven't been enough, send one, and up the count to what it should
8148 if (warning_count < count)
8152 pid_t pid = child_open_exim(&fd);
8158 FILE *f = fdopen(fd, "wb");
8160 transport_ctx tctx = {{0}};
8162 if (warn_message_file)
8163 if (!(wmf = Ufopen(warn_message_file, "rb")))
8164 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for warning "
8165 "message texts: %s", warn_message_file, strerror(errno));
8167 warnmsg_recipients = recipients;
8168 warnmsg_delay = queue_time < 120*60
8169 ? string_sprintf("%d minutes", show_time/60)
8170 : string_sprintf("%d hours", show_time/3600);
8172 if (errors_reply_to)
8173 fprintf(f, "Reply-To: %s\n", errors_reply_to);
8174 fprintf(f, "Auto-Submitted: auto-replied\n");
8176 fprintf(f, "To: %s\n", recipients);
8178 /* generated boundary string and output MIME-Headers */
8179 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
8181 fprintf(f, "Content-Type: multipart/report;"
8182 " report-type=delivery-status; boundary=%s\n"
8183 "MIME-Version: 1.0\n",
8186 if ((wmf_text = next_emf(wmf, US"header")))
8187 fprintf(f, "%s\n", wmf_text);
8189 fprintf(f, "Subject: Warning: message %s delayed %s\n\n",
8190 message_id, warnmsg_delay);
8192 /* output human readable part as text/plain section */
8194 "Content-type: text/plain; charset=us-ascii\n\n",
8197 if ((wmf_text = next_emf(wmf, US"intro")))
8198 fprintf(f, "%s", CS wmf_text);
8202 "This message was created automatically by mail delivery software.\n");
8204 if (Ustrcmp(recipients, sender_address) == 0)
8206 "A message that you sent has not yet been delivered to one or more of its\n"
8207 "recipients after more than ");
8211 "A message sent by\n\n <%s>\n\n"
8212 "has not yet been delivered to one or more of its recipients after more than \n",
8215 fprintf(f, "%s on the queue on %s.\n\n"
8216 "The message identifier is: %s\n",
8217 warnmsg_delay, primary_hostname, message_id);
8219 for (h = header_list; h; h = h->next)
8220 if (strncmpic(h->text, US"Subject:", 8) == 0)
8221 fprintf(f, "The subject of the message is: %s", h->text + 9);
8222 else if (strncmpic(h->text, US"Date:", 5) == 0)
8223 fprintf(f, "The date of the message is: %s", h->text + 6);
8226 fprintf(f, "The address%s to which the message has not yet been "
8228 !addr_defer->next ? "" : "es",
8229 !addr_defer->next ? "is": "are");
8232 /* List the addresses, with error information if allowed */
8234 /* store addr_defer for machine readable part */
8235 address_item *addr_dsndefer = addr_defer;
8239 address_item *addr = addr_defer;
8240 addr_defer = addr->next;
8241 if (print_address_information(addr, f, US" ", US"\n ", US""))
8242 print_address_error(addr, f, US"Delay reason: ");
8251 if ((wmf_text = next_emf(wmf, US"final")))
8252 fprintf(f, "%s", CS wmf_text);
8258 "No action is required on your part. Delivery attempts will continue for\n"
8259 "some time, and this warning may be repeated at intervals if the message\n"
8260 "remains undelivered. Eventually the mail delivery software will give up,\n"
8261 "and when that happens, the message will be returned to you.\n");
8264 /* output machine readable part */
8265 fprintf(f, "\n--%s\n"
8266 "Content-type: message/delivery-status\n\n"
8267 "Reporting-MTA: dns; %s\n",
8269 smtp_active_hostname);
8274 /* must be decoded from xtext: see RFC 3461:6.3a */
8276 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
8277 fprintf(f,"Original-Envelope-ID: %s\n", dsn_envid);
8279 fprintf(f,"X-Original-Envelope-ID: error decoding xtext formatted ENVID\n");
8283 for ( ; addr_dsndefer; addr_dsndefer = addr_dsndefer->next)
8285 if (addr_dsndefer->dsn_orcpt)
8286 fprintf(f, "Original-Recipient: %s\n", addr_dsndefer->dsn_orcpt);
8288 fprintf(f, "Action: delayed\n"
8289 "Final-Recipient: rfc822;%s\n"
8291 addr_dsndefer->address);
8292 if (addr_dsndefer->host_used && addr_dsndefer->host_used->name)
8294 fprintf(f, "Remote-MTA: dns; %s\n",
8295 addr_dsndefer->host_used->name);
8296 print_dsn_diagnostic_code(addr_dsndefer, f);
8302 "Content-type: text/rfc822-headers\n\n",
8306 /* header only as required by RFC. only failure DSN needs to honor RET=FULL */
8307 tctx.u.fd = fileno(f);
8308 tctx.options = topt_add_return_path | topt_no_body;
8309 transport_filter_argv = NULL; /* Just in case */
8310 return_path = sender_address; /* In case not previously set */
8312 /* Write the original email out */
8313 transport_write_message(&tctx, 0);
8316 fprintf(f,"\n--%s--\n", bound);
8320 /* Close and wait for child process to complete, without a timeout.
8321 If there's an error, don't update the count. */
8324 if (child_close(pid, 0) == 0)
8326 warning_count = count;
8327 update_spool = TRUE; /* Ensure spool rewritten */
8333 /* Clear deliver_domain */
8335 deliver_domain = NULL;
8337 /* If this was a first delivery attempt, unset the first time flag, and
8338 ensure that the spool gets updated. */
8340 if (f.deliver_firsttime)
8342 f.deliver_firsttime = FALSE;
8343 update_spool = TRUE;
8346 /* If delivery was frozen and freeze_tell is set, generate an appropriate
8347 message, unless the message is a local error message (to avoid loops). Then
8348 log the freezing. If the text in "frozen_info" came from a system filter,
8349 it has been escaped into printing characters so as not to mess up log lines.
8350 For the "tell" message, we turn \n back into newline. Also, insert a newline
8351 near the start instead of the ": " string. */
8353 if (f.deliver_freeze)
8355 if (freeze_tell && freeze_tell[0] != 0 && !f.local_error_message)
8357 uschar *s = string_copy(frozen_info);
8358 uschar *ss = Ustrstr(s, " by the system filter: ");
8369 if (*ss == '\\' && ss[1] == 'n')
8376 moan_tell_someone(freeze_tell, addr_defer, US"Message frozen",
8377 "Message %s has been frozen%s.\nThe sender is <%s>.\n", message_id,
8381 /* Log freezing just before we update the -H file, to minimize the chance
8382 of a race problem. */
8384 deliver_msglog("*** Frozen%s\n", frozen_info);
8385 log_write(0, LOG_MAIN, "Frozen%s", frozen_info);
8388 /* If there have been any updates to the non-recipients list, or other things
8389 that get written to the spool, we must now update the spool header file so
8390 that it has the right information for the next delivery attempt. If there
8391 was more than one address being delivered, the header_change update is done
8392 earlier, in case one succeeds and then something crashes. */
8395 debug_printf("delivery deferred: update_spool=%d header_rewritten=%d\n",
8396 update_spool, f.header_rewritten);
8398 if (update_spool || f.header_rewritten)
8399 /* Panic-dies on error */
8400 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
8403 /* Finished with the message log. If the message is complete, it will have
8404 been unlinked or renamed above. */
8406 if (message_logs) (void)fclose(message_log);
8408 /* Now we can close and remove the journal file. Its only purpose is to record
8409 successfully completed deliveries asap so that this information doesn't get
8410 lost if Exim (or the machine) crashes. Forgetting about a failed delivery is
8411 not serious, as trying it again is not harmful. The journal might not be open
8412 if all addresses were deferred at routing or directing. Nevertheless, we must
8413 remove it if it exists (may have been lying around from a crash during the
8414 previous delivery attempt). We don't remove the journal if a delivery
8415 subprocess failed to pass back delivery information; this is controlled by
8416 the remove_journal flag. When the journal is left, we also don't move the
8417 message off the main spool if frozen and the option is set. It should get moved
8418 at the next attempt, after the journal has been inspected. */
8420 if (journal_fd >= 0) (void)close(journal_fd);
8424 uschar * fname = spool_fname(US"input", message_subdir, id, US"-J");
8426 if (Uunlink(fname) < 0 && errno != ENOENT)
8427 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s", fname,
8430 /* Move the message off the spool if requested */
8432 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
8433 if (f.deliver_freeze && move_frozen_messages)
8434 (void)spool_move_message(id, message_subdir, US"", US"F");
8438 /* Closing the data file frees the lock; if the file has been unlinked it
8439 will go away. Otherwise the message becomes available for another process
8442 (void)close(deliver_datafile);
8443 deliver_datafile = -1;
8444 DEBUG(D_deliver) debug_printf("end delivery of %s\n", id);
8446 /* It is unlikely that there will be any cached resources, since they are
8447 released after routing, and in the delivery subprocesses. However, it's
8448 possible for an expansion for something afterwards (for example,
8449 expand_check_condition) to do a lookup. We must therefore be sure everything is
8453 acl_where = ACL_WHERE_UNKNOWN;
8462 #ifdef EXIM_TFO_PROBE
8465 f.tcp_fastopen_ok = TRUE;
8469 if (!regex_PIPELINING) regex_PIPELINING =
8470 regex_must_compile(US"\\n250[\\s\\-]PIPELINING(\\s|\\n|$)", FALSE, TRUE);
8472 if (!regex_SIZE) regex_SIZE =
8473 regex_must_compile(US"\\n250[\\s\\-]SIZE(\\s|\\n|$)", FALSE, TRUE);
8475 if (!regex_AUTH) regex_AUTH =
8476 regex_must_compile(US"\\n250[\\s\\-]AUTH\\s+([\\-\\w\\s]+)(?:\\n|$)",
8480 if (!regex_STARTTLS) regex_STARTTLS =
8481 regex_must_compile(US"\\n250[\\s\\-]STARTTLS(\\s|\\n|$)", FALSE, TRUE);
8483 # ifdef EXPERIMENTAL_REQUIRETLS
8484 if (!regex_REQUIRETLS) regex_REQUIRETLS =
8485 regex_must_compile(US"\\n250[\\s\\-]REQUIRETLS(\\s|\\n|$)", FALSE, TRUE);
8489 if (!regex_CHUNKING) regex_CHUNKING =
8490 regex_must_compile(US"\\n250[\\s\\-]CHUNKING(\\s|\\n|$)", FALSE, TRUE);
8492 #ifndef DISABLE_PRDR
8493 if (!regex_PRDR) regex_PRDR =
8494 regex_must_compile(US"\\n250[\\s\\-]PRDR(\\s|\\n|$)", FALSE, TRUE);
8498 if (!regex_UTF8) regex_UTF8 =
8499 regex_must_compile(US"\\n250[\\s\\-]SMTPUTF8(\\s|\\n|$)", FALSE, TRUE);
8502 if (!regex_DSN) regex_DSN =
8503 regex_must_compile(US"\\n250[\\s\\-]DSN(\\s|\\n|$)", FALSE, TRUE);
8505 if (!regex_IGNOREQUOTA) regex_IGNOREQUOTA =
8506 regex_must_compile(US"\\n250[\\s\\-]IGNOREQUOTA(\\s|\\n|$)", FALSE, TRUE);
8511 deliver_get_sender_address (uschar * id)
8514 uschar * new_sender_address,
8515 * save_sender_address;
8516 BOOL save_qr = f.queue_running;
8519 /* make spool_open_datafile non-noisy on fail */
8521 f.queue_running = TRUE;
8523 /* Side effect: message_subdir is set for the (possibly split) spool directory */
8525 deliver_datafile = spool_open_datafile(id);
8526 f.queue_running = save_qr;
8527 if (deliver_datafile < 0)
8530 /* Save and restore the global sender_address. I'm not sure if we should
8531 not save/restore all the other global variables too, because
8532 spool_read_header() may change all of them. But OTOH, when this
8533 deliver_get_sender_address() gets called, the current message is done
8534 already and nobody needs the globals anymore. (HS12, 2015-08-21) */
8536 spoolname = string_sprintf("%s-H", id);
8537 save_sender_address = sender_address;
8539 rc = spool_read_header(spoolname, TRUE, TRUE);
8541 new_sender_address = sender_address;
8542 sender_address = save_sender_address;
8544 if (rc != spool_read_OK)
8547 assert(new_sender_address);
8549 (void)close(deliver_datafile);
8550 deliver_datafile = -1;
8552 return new_sender_address;
8558 delivery_re_exec(int exec_type)
8562 if (cutthrough.cctx.sock >= 0 && cutthrough.callout_hold_only)
8564 int channel_fd = cutthrough.cctx.sock;
8566 smtp_peer_options = cutthrough.peer_options;
8567 continue_sequence = 0;
8570 if (cutthrough.is_tls)
8574 smtp_peer_options |= OPTION_TLS;
8575 sending_ip_address = cutthrough.snd_ip;
8576 sending_port = cutthrough.snd_port;
8578 where = US"socketpair";
8579 if (socketpair(AF_UNIX, SOCK_STREAM, 0, pfd) != 0)
8583 if ((pid = fork()) < 0)
8586 else if (pid == 0) /* child: fork again to totally disconnect */
8588 if (f.running_in_test_harness) millisleep(100); /* let parent debug out */
8589 /* does not return */
8590 smtp_proxy_tls(cutthrough.cctx.tls_ctx, big_buffer, big_buffer_size,
8594 DEBUG(D_transport) debug_printf("proxy-proc inter-pid %d\n", pid);
8596 waitpid(pid, NULL, 0);
8597 (void) close(channel_fd); /* release the client socket */
8598 channel_fd = pfd[1];
8602 transport_do_pass_socket(cutthrough.transport, cutthrough.host.name,
8603 cutthrough.host.address, message_id, channel_fd);
8607 cancel_cutthrough_connection(TRUE, US"non-continued delivery");
8608 (void) child_exec_exim(exec_type, FALSE, NULL, FALSE, 2, US"-Mc", message_id);
8610 return; /* compiler quietening; control does not reach here. */
8615 LOG_MAIN | (exec_type == CEE_EXEC_EXIT ? LOG_PANIC : LOG_PANIC_DIE),
8616 "delivery re-exec %s failed: %s", where, strerror(errno));
8618 /* Get here if exec_type == CEE_EXEC_EXIT.
8619 Note: this must be _exit(), not exit(). */
8621 _exit(EX_EXECFAILED);
8627 /* End of deliver.c */