1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) The Exim Maintainers 2020 - 2023 */
6 /* Copyright (c) University of Cambridge 1995 - 2018 */
7 /* See the file NOTICE for conditions of use and distribution. */
8 /* SPDX-License-Identifier: GPL-2.0-or-later */
10 /* The main code for delivering a message. */
14 #include "transports/smtp.h"
19 /* Data block for keeping track of subprocesses for parallel remote
22 typedef struct pardata {
23 address_item *addrlist; /* chain of addresses */
24 address_item *addr; /* next address data expected for */
25 pid_t pid; /* subprocess pid */
26 int fd; /* pipe fd for getting result from subprocess */
27 int transport_count; /* returned transport count value */
28 BOOL done; /* no more data needed */
29 uschar *msg; /* error message */
30 uschar *return_path; /* return_path for these addresses */
33 /* Values for the process_recipients variable */
35 enum { RECIP_ACCEPT, RECIP_IGNORE, RECIP_DEFER,
36 RECIP_FAIL, RECIP_FAIL_FILTER, RECIP_FAIL_TIMEOUT,
39 /* Mutually recursive functions for marking addresses done. */
41 static void child_done(address_item *, const uschar *);
42 static void address_done(address_item *, const uschar *);
44 /* Table for turning base-62 numbers into binary */
46 static uschar tab62[] =
47 {0,1,2,3,4,5,6,7,8,9,0,0,0,0,0,0, /* 0-9 */
48 0,10,11,12,13,14,15,16,17,18,19,20, /* A-K */
49 21,22,23,24,25,26,27,28,29,30,31,32, /* L-W */
50 33,34,35, 0, 0, 0, 0, 0, /* X-Z */
51 0,36,37,38,39,40,41,42,43,44,45,46, /* a-k */
52 47,48,49,50,51,52,53,54,55,56,57,58, /* l-w */
56 /*************************************************
57 * Local static variables *
58 *************************************************/
60 /* addr_duplicate is global because it needs to be seen from the Envelope-To
63 static address_item *addr_defer = NULL;
64 static address_item *addr_failed = NULL;
65 static address_item *addr_fallback = NULL;
66 static address_item *addr_local = NULL;
67 static address_item *addr_new = NULL;
68 static address_item *addr_remote = NULL;
69 static address_item *addr_route = NULL;
70 static address_item *addr_succeed = 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 struct pollfd *parpoll;
78 static int return_count;
79 static uschar *frozen_info = US"";
80 static uschar *used_return_path = NULL;
84 /*************************************************
85 * read as much as requested *
86 *************************************************/
88 /* The syscall read(2) doesn't always returns as much as we want. For
89 several reasons it might get less. (Not talking about signals, as syscalls
90 are restartable). When reading from a network or pipe connection the sender
91 might send in smaller chunks, with delays between these chunks. The read(2)
92 may return such a chunk.
94 The more the writer writes and the smaller the pipe between write and read is,
95 the more we get the chance of reading leass than requested. (See bug 2130)
97 This function read(2)s until we got all the data we *requested*.
99 Note: This function may block. Use it only if you're sure about the
100 amount of data you will get.
103 fd the file descriptor to read from
104 buffer pointer to a buffer of size len
105 len the requested(!) amount of bytes
107 Returns: the amount of bytes read
110 readn(int fd, void * buffer, size_t len)
112 uschar * next = buffer;
113 uschar * end = next + len;
117 ssize_t got = read(fd, next, end - next);
119 /* I'm not sure if there are signals that can interrupt us,
120 for now I assume the worst */
121 if (got == -1 && errno == EINTR) continue;
122 if (got <= 0) return next - US buffer;
130 /*************************************************
131 * Make a new address item *
132 *************************************************/
134 /* This function gets the store and initializes with default values. The
135 transport_return value defaults to DEFER, so that any unexpected failure to
136 deliver does not wipe out the message. The default unique string is set to a
137 copy of the address, so that its domain can be lowercased.
140 address the RFC822 address string
141 copy force a copy of the address
143 Returns: a pointer to an initialized address_item
147 deliver_make_addr(uschar *address, BOOL copy)
149 address_item * addr = store_get(sizeof(address_item), GET_UNTAINTED);
150 *addr = address_defaults;
151 if (copy) address = string_copy(address);
152 addr->address = address;
153 addr->unique = string_copy(address);
160 /*************************************************
161 * Set expansion values for an address *
162 *************************************************/
164 /* Certain expansion variables are valid only when handling an address or
165 address list. This function sets them up or clears the values, according to its
169 addr the address in question, or NULL to clear values
174 deliver_set_expansions(address_item *addr)
178 const uschar ***p = address_expansions;
179 while (*p) **p++ = NULL;
183 /* Exactly what gets set depends on whether there is one or more addresses, and
184 what they contain. These first ones are always set, taking their values from
185 the first address. */
187 if (!addr->host_list)
189 deliver_host = deliver_host_address = US"";
190 deliver_host_port = 0;
194 deliver_host = addr->host_list->name;
195 deliver_host_address = addr->host_list->address;
196 deliver_host_port = addr->host_list->port;
199 deliver_recipients = addr;
200 deliver_address_data = addr->prop.address_data;
201 deliver_domain_data = addr->prop.domain_data;
202 deliver_localpart_data = addr->prop.localpart_data;
203 router_var = addr->prop.variables;
205 /* These may be unset for multiple addresses */
207 deliver_domain = addr->domain;
208 self_hostname = addr->self_hostname;
210 #ifdef EXPERIMENTAL_BRIGHTMAIL
211 bmi_deliver = 1; /* deliver by default */
212 bmi_alt_location = NULL;
213 bmi_base64_verdict = NULL;
214 bmi_base64_tracker_verdict = NULL;
217 /* If there's only one address we can set everything. */
221 address_item *addr_orig;
223 deliver_localpart = addr->local_part;
224 deliver_localpart_prefix = addr->prefix;
225 deliver_localpart_prefix_v = addr->prefix_v;
226 deliver_localpart_suffix = addr->suffix;
227 deliver_localpart_suffix_v = addr->suffix_v;
229 for (addr_orig = addr; addr_orig->parent; addr_orig = addr_orig->parent) ;
230 deliver_domain_orig = addr_orig->domain;
232 /* Re-instate any prefix and suffix in the original local part. In all
233 normal cases, the address will have a router associated with it, and we can
234 choose the caseful or caseless version accordingly. However, when a system
235 filter sets up a pipe, file, or autoreply delivery, no router is involved.
236 In this case, though, there won't be any prefix or suffix to worry about. */
238 deliver_localpart_orig = !addr_orig->router
239 ? addr_orig->local_part
240 : addr_orig->router->caseful_local_part
241 ? addr_orig->cc_local_part
242 : addr_orig->lc_local_part;
244 /* If there's a parent, make its domain and local part available, and if
245 delivering to a pipe or file, or sending an autoreply, get the local
246 part from the parent. For pipes and files, put the pipe or file string
247 into address_pipe and address_file. */
251 deliver_domain_parent = addr->parent->domain;
252 deliver_localpart_parent = !addr->parent->router
253 ? addr->parent->local_part
254 : addr->parent->router->caseful_local_part
255 ? addr->parent->cc_local_part
256 : addr->parent->lc_local_part;
258 /* File deliveries have their own flag because they need to be picked out
259 as special more often. */
261 if (testflag(addr, af_pfr))
263 if (testflag(addr, af_file)) address_file = addr->local_part;
264 else if (deliver_localpart[0] == '|') address_pipe = addr->local_part;
265 deliver_localpart = addr->parent->local_part;
266 deliver_localpart_prefix = addr->parent->prefix;
267 deliver_localpart_prefix_v = addr->parent->prefix_v;
268 deliver_localpart_suffix = addr->parent->suffix;
269 deliver_localpart_suffix_v = addr->parent->suffix_v;
273 #ifdef EXPERIMENTAL_BRIGHTMAIL
274 /* Set expansion variables related to Brightmail AntiSpam */
275 bmi_base64_verdict = bmi_get_base64_verdict(deliver_localpart_orig, deliver_domain_orig);
276 bmi_base64_tracker_verdict = bmi_get_base64_tracker_verdict(bmi_base64_verdict);
277 /* get message delivery status (0 - don't deliver | 1 - deliver) */
278 bmi_deliver = bmi_get_delivery_status(bmi_base64_verdict);
279 /* if message is to be delivered, get eventual alternate location */
280 if (bmi_deliver == 1)
281 bmi_alt_location = bmi_get_alt_location(bmi_base64_verdict);
286 /* For multiple addresses, don't set local part, and leave the domain and
287 self_hostname set only if it is the same for all of them. It is possible to
288 have multiple pipe and file addresses, but only when all addresses have routed
289 to the same pipe or file. */
293 if (testflag(addr, af_pfr))
295 if (testflag(addr, af_file)) address_file = addr->local_part;
296 else if (addr->local_part[0] == '|') address_pipe = addr->local_part;
298 for (address_item * addr2 = addr->next; addr2; addr2 = addr2->next)
300 if (deliver_domain && Ustrcmp(deliver_domain, addr2->domain) != 0)
301 deliver_domain = NULL;
303 && ( !addr2->self_hostname
304 || Ustrcmp(self_hostname, addr2->self_hostname) != 0
306 self_hostname = NULL;
307 if (!deliver_domain && !self_hostname) break;
315 /*************************************************
316 * Open a msglog file *
317 *************************************************/
319 /* This function is used both for normal message logs, and for files in the
320 msglog directory that are used to catch output from pipes. Try to create the
321 directory if it does not exist. From release 4.21, normal message logs should
322 be created when the message is received.
324 Called from deliver_message(), can be operating as root.
327 filename the file name
328 mode the mode required
329 error used for saying what failed
331 Returns: a file descriptor, or -1 (with errno set)
335 open_msglog_file(uschar *filename, int mode, uschar **error)
337 if (Ustrstr(filename, US"/../"))
338 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
339 "Attempt to open msglog file path with upward-traversal: '%s'\n", filename);
341 for (int i = 2; i > 0; i--)
343 int fd = Uopen(filename,
344 EXIM_CLOEXEC | EXIM_NOFOLLOW | O_WRONLY|O_APPEND|O_CREAT, mode);
347 /* Set the close-on-exec flag and change the owner to the exim uid/gid (this
348 function is called as root). Double check the mode, because the group setting
349 doesn't always get set automatically. */
352 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
354 if (exim_fchown(fd, exim_uid, exim_gid, filename) < 0)
359 if (fchmod(fd, mode) < 0)
369 (void)directory_make(spool_directory,
370 spool_sname(US"msglog", message_subdir),
371 MSGLOG_DIRECTORY_MODE, TRUE);
374 *error = US"create or open";
381 /*************************************************
382 * Write to msglog if required *
383 *************************************************/
385 /* Write to the message log, if configured. This function may also be called
389 format a string format
395 deliver_msglog(const char *format, ...)
398 if (!message_logs) return;
399 va_start(ap, format);
400 vfprintf(message_log, format, ap);
408 /*************************************************
409 * Replicate status for batch *
410 *************************************************/
412 /* When a transport handles a batch of addresses, it may treat them
413 individually, or it may just put the status in the first one, and return FALSE,
414 requesting that the status be copied to all the others externally. This is the
415 replication function. As well as the status, it copies the transport pointer,
416 which may have changed if appendfile passed the addresses on to a different
419 Argument: pointer to the first address in a chain
424 replicate_status(address_item *addr)
426 for (address_item * 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_time = addr->delivery_time;
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.
458 We do not try to batch up different A-record host names that refer to the
462 one points to the first host list
463 two points to the second host list
465 Returns: TRUE if the lists refer to the same host set
469 same_hosts(host_item *one, host_item *two)
473 if (Ustrcmp(one->name, two->name) != 0)
476 host_item *end_one = one;
477 host_item *end_two = two;
479 /* Batch up only if there was no MX and the list was not randomized */
481 if (mx == MX_NONE) return FALSE;
483 /* Find the ends of the shortest sequence of identical MX values */
485 while ( end_one->next && end_one->next->mx == mx
486 && end_two->next && end_two->next->mx == mx)
488 end_one = end_one->next;
489 end_two = end_two->next;
492 /* If there aren't any duplicates, there's no match. */
494 if (end_one == one) return FALSE;
496 /* For each host in the 'one' sequence, check that it appears in the 'two'
497 sequence, returning FALSE if not. */
502 for (hi = two; hi != end_two->next; hi = hi->next)
503 if (Ustrcmp(one->name, hi->name) == 0) break;
504 if (hi == end_two->next) return FALSE;
505 if (one == end_one) break;
509 /* All the hosts in the 'one' sequence were found in the 'two' sequence.
510 Ensure both are pointing at the last host, and carry on as for equality. */
515 /* if the names matched but ports do not, mismatch */
516 else if (one->port != two->port)
520 /* DNSSEC equality */
521 if (one->dnssec != two->dnssec) return FALSE;
529 /* True if both are NULL */
536 /*************************************************
537 * Compare header lines *
538 *************************************************/
540 /* This function is given two pointers to chains of header items, and it yields
541 TRUE if they are the same header texts in the same order.
544 one points to the first header list
545 two points to the second header list
547 Returns: TRUE if the lists refer to the same header set
551 same_headers(header_line *one, header_line *two)
553 for (;; one = one->next, two = two->next)
555 if (one == two) return TRUE; /* Includes the case where both NULL */
556 if (!one || !two) return FALSE;
557 if (Ustrcmp(one->text, two->text) != 0) return FALSE;
563 /*************************************************
564 * Compare string settings *
565 *************************************************/
567 /* This function is given two pointers to strings, and it returns
568 TRUE if they are the same pointer, or if the two strings are the same.
571 one points to the first string
572 two points to the second string
574 Returns: TRUE or FALSE
578 same_strings(uschar *one, uschar *two)
580 if (one == two) return TRUE; /* Includes the case where both NULL */
581 if (!one || !two) return FALSE;
582 return (Ustrcmp(one, two) == 0);
587 /*************************************************
588 * Compare uid/gid for addresses *
589 *************************************************/
591 /* This function is given a transport and two addresses. It yields TRUE if the
592 uid/gid/initgroups settings for the two addresses are going to be the same when
597 addr1 the first address
598 addr2 the second address
600 Returns: TRUE or FALSE
604 same_ugid(transport_instance *tp, address_item *addr1, address_item *addr2)
606 if ( !tp->uid_set && !tp->expand_uid
607 && !tp->deliver_as_creator
608 && ( testflag(addr1, af_uid_set) != testflag(addr2, af_gid_set)
609 || ( testflag(addr1, af_uid_set)
610 && ( addr1->uid != addr2->uid
611 || testflag(addr1, af_initgroups) != testflag(addr2, af_initgroups)
615 if ( !tp->gid_set && !tp->expand_gid
616 && ( testflag(addr1, af_gid_set) != testflag(addr2, af_gid_set)
617 || ( testflag(addr1, af_gid_set)
618 && addr1->gid != addr2->gid
628 /*************************************************
629 * Record that an address is complete *
630 *************************************************/
632 /* This function records that an address is complete. This is straightforward
633 for most addresses, where the unique address is just the full address with the
634 domain lower cased. For homonyms (addresses that are the same as one of their
635 ancestors) their are complications. Their unique addresses have \x\ prepended
636 (where x = 0, 1, 2...), so that de-duplication works correctly for siblings and
639 Exim used to record the unique addresses of homonyms as "complete". This,
640 however, fails when the pattern of redirection varies over time (e.g. if taking
641 unseen copies at only some times of day) because the prepended numbers may vary
642 from one delivery run to the next. This problem is solved by never recording
643 prepended unique addresses as complete. Instead, when a homonymic address has
644 actually been delivered via a transport, we record its basic unique address
645 followed by the name of the transport. This is checked in subsequent delivery
646 runs whenever an address is routed to a transport.
648 If the completed address is a top-level one (has no parent, which means it
649 cannot be homonymic) we also add the original address to the non-recipients
650 tree, so that it gets recorded in the spool file and therefore appears as
651 "done" in any spool listings. The original address may differ from the unique
652 address in the case of the domain.
654 Finally, this function scans the list of duplicates, marks as done any that
655 match this address, and calls child_done() for their ancestors.
658 addr address item that has been completed
659 now current time as a string
665 address_done(address_item * addr, const uschar * now)
667 update_spool = TRUE; /* Ensure spool gets updated */
669 /* Top-level address */
673 tree_add_nonrecipient(addr->unique);
674 tree_add_nonrecipient(addr->address);
677 /* Homonymous child address */
679 else if (testflag(addr, af_homonym))
682 tree_add_nonrecipient(
683 string_sprintf("%s/%s", addr->unique + 3, addr->transport->name));
686 /* Non-homonymous child address */
688 else tree_add_nonrecipient(addr->unique);
690 /* Check the list of duplicate addresses and ensure they are now marked
693 for (address_item * dup = addr_duplicate; dup; dup = dup->next)
694 if (Ustrcmp(addr->unique, dup->unique) == 0)
696 tree_add_nonrecipient(dup->unique);
697 child_done(dup, now);
704 /*************************************************
705 * Decrease counts in parents and mark done *
706 *************************************************/
708 /* This function is called when an address is complete. If there is a parent
709 address, its count of children is decremented. If there are still other
710 children outstanding, the function exits. Otherwise, if the count has become
711 zero, address_done() is called to mark the parent and its duplicates complete.
712 Then loop for any earlier ancestors.
715 addr points to the completed address item
716 now the current time as a string, for writing to the message log
722 child_done(address_item * addr, const uschar * now)
729 if (--addr->child_count > 0) return; /* Incomplete parent */
730 address_done(addr, now);
732 /* Log the completion of all descendents only when there is no ancestor with
733 the same original address. */
735 for (aa = addr->parent; aa; aa = aa->parent)
736 if (Ustrcmp(aa->address, addr->address) == 0) break;
739 deliver_msglog("%s %s: children all complete\n", now, addr->address);
740 DEBUG(D_deliver) debug_printf("%s: children all complete\n", addr->address);
746 /*************************************************
747 * Delivery logging support functions *
748 *************************************************/
750 /* The LOGGING() checks in d_log_interface() are complicated for backwards
751 compatibility. When outgoing interface logging was originally added, it was
752 conditional on just incoming_interface (which is off by default). The
753 outgoing_interface option is on by default to preserve this behaviour, but
754 you can enable incoming_interface and disable outgoing_interface to get I=
755 fields on incoming lines only.
759 addr The address to be logged
761 Returns: New value for s
765 d_log_interface(gstring * g)
767 if (LOGGING(incoming_interface) && LOGGING(outgoing_interface)
768 && sending_ip_address)
770 g = string_fmt_append(g, " I=[%s]", sending_ip_address);
771 if (LOGGING(outgoing_port))
772 g = string_fmt_append(g, ":%d", sending_port);
780 d_hostlog(gstring * g, address_item * addr)
782 host_item * h = addr->host_used;
784 g = string_append(g, 2, US" H=", h->name);
786 if (LOGGING(dnssec) && h->dnssec == DS_YES)
787 g = string_catn(g, US" DS", 3);
789 g = string_append(g, 3, US" [", h->address, US"]");
791 if (LOGGING(outgoing_port))
792 g = string_fmt_append(g, ":%d", h->port);
794 if (continue_sequence > 1) /*XXX this is wrong for a dropped proxyconn. Would have to pass back from transport */
795 g = string_catn(g, US"*", 1);
798 if (LOGGING(proxy) && proxy_local_address)
800 g = string_append(g, 3, US" PRX=[", proxy_local_address, US"]");
801 if (LOGGING(outgoing_port))
802 g = string_fmt_append(g, ":%d", proxy_local_port);
806 g = d_log_interface(g);
808 if (testflag(addr, af_tcp_fastopen))
809 g = string_catn(g, US" TFO*", testflag(addr, af_tcp_fastopen_data) ? 5 : 4);
820 d_tlslog(gstring * g, address_item * addr)
822 if (LOGGING(tls_cipher) && addr->cipher)
824 g = string_append(g, 2, US" X=", addr->cipher);
825 #ifndef DISABLE_TLS_RESUME
826 if (LOGGING(tls_resumption) && testflag(addr, af_tls_resume))
827 g = string_catn(g, US"*", 1);
830 if (LOGGING(tls_certificate_verified) && addr->cipher)
831 g = string_append(g, 2, US" CV=",
832 testflag(addr, af_cert_verified)
835 testflag(addr, af_dane_verified)
841 if (LOGGING(tls_peerdn) && addr->peerdn)
842 g = string_append(g, 3, US" DN=\"", string_printing(addr->peerdn), US"\"");
850 #ifndef DISABLE_EVENT
851 /* Distribute a named event to any listeners.
853 Args: action config option specifying listener
854 event name of the event
855 ev_data associated data for the event
856 errnop pointer to errno for modification, or null
858 Return: string expansion from listener, or NULL
862 event_raise(uschar * action, const uschar * event, uschar * ev_data, int * errnop)
868 debug_printf("Event(%s): event_action=|%s| delivery_IP=%s\n",
870 action, deliver_host_address);
873 event_data = ev_data;
875 if (!(s = expand_string(action)) && *expand_string_message)
876 log_write(0, LOG_MAIN|LOG_PANIC,
877 "failed to expand event_action %s in %s: %s\n",
878 event, transport_name ? transport_name : US"main", expand_string_message);
880 event_name = event_data = NULL;
882 /* If the expansion returns anything but an empty string, flag for
883 the caller to modify his normal processing
888 debug_printf("Event(%s): event_action returned \"%s\"\n", event, s);
890 *errnop = ERRNO_EVENT;
898 msg_event_raise(const uschar * event, const address_item * addr)
900 const uschar * save_domain = deliver_domain;
901 uschar * save_local = deliver_localpart;
902 const uschar * save_host = deliver_host;
903 const uschar * save_address = deliver_host_address;
904 const int save_port = deliver_host_port;
906 router_name = addr->router ? addr->router->name : NULL;
907 deliver_domain = addr->domain;
908 deliver_localpart = addr->local_part;
909 deliver_host = addr->host_used ? addr->host_used->name : NULL;
911 if (!addr->transport)
913 if (Ustrcmp(event, "msg:fail:delivery") == 0)
915 /* An address failed with no transport involved. This happens when
916 a filter was used which triggered a fail command (in such a case
917 a transport isn't needed). Convert it to an internal fail event. */
919 (void) event_raise(event_action, US"msg:fail:internal", addr->message, NULL);
924 transport_name = addr->transport->name;
926 (void) event_raise(addr->transport->event_action, event,
928 || Ustrcmp(addr->transport->driver_name, "smtp") == 0
929 || Ustrcmp(addr->transport->driver_name, "lmtp") == 0
930 || Ustrcmp(addr->transport->driver_name, "autoreply") == 0
931 ? addr->message : NULL,
935 deliver_host_port = save_port;
936 deliver_host_address = save_address;
937 deliver_host = save_host;
938 deliver_localpart = save_local;
939 deliver_domain = save_domain;
940 router_name = transport_name = NULL;
942 #endif /*DISABLE_EVENT*/
946 /******************************************************************************/
949 /*************************************************
950 * Generate local part for logging *
951 *************************************************/
954 string_get_lpart_sub(const address_item * addr, uschar * s)
957 if (testflag(addr, af_utf8_downcvt))
959 uschar * t = string_localpart_utf8_to_alabel(s, NULL);
960 return t ? t : s; /* t is NULL on a failed conversion */
966 /* This function is a subroutine for use in string_log_address() below.
969 addr the address being logged
970 yield the current dynamic buffer pointer
972 Returns: the new value of the buffer pointer
976 string_get_localpart(address_item * addr, gstring * yield)
980 if (testflag(addr, af_include_affixes) && (s = addr->prefix))
981 yield = string_cat(yield, string_get_lpart_sub(addr, s));
983 yield = string_cat(yield, string_get_lpart_sub(addr, addr->local_part));
985 if (testflag(addr, af_include_affixes) && (s = addr->suffix))
986 yield = string_cat(yield, string_get_lpart_sub(addr, s));
992 /*************************************************
993 * Generate log address list *
994 *************************************************/
996 /* This function generates a list consisting of an address and its parents, for
997 use in logging lines. For saved onetime aliased addresses, the onetime parent
998 field is used. If the address was delivered by a transport with rcpt_include_
999 affixes set, the af_include_affixes bit will be set in the address. In that
1000 case, we include the affixes here too.
1003 g points to growing-string struct
1004 addr bottom (ultimate) address
1005 all_parents if TRUE, include all parents
1006 success TRUE for successful delivery
1008 Returns: a growable string in dynamic store
1012 string_log_address(gstring * g,
1013 address_item *addr, BOOL all_parents, BOOL success)
1015 BOOL add_topaddr = TRUE;
1016 address_item *topaddr;
1018 /* Find the ultimate parent */
1020 for (topaddr = addr; topaddr->parent; topaddr = topaddr->parent) ;
1022 /* We start with just the local part for pipe, file, and reply deliveries, and
1023 for successful local deliveries from routers that have the log_as_local flag
1024 set. File deliveries from filters can be specified as non-absolute paths in
1025 cases where the transport is going to complete the path. If there is an error
1026 before this happens (expansion failure) the local part will not be updated, and
1027 so won't necessarily look like a path. Add extra text for this case. */
1029 if ( testflag(addr, af_pfr)
1031 && addr->router && addr->router->log_as_local
1032 && addr->transport && addr->transport->info->local
1035 if (testflag(addr, af_file) && addr->local_part[0] != '/')
1036 g = string_catn(g, CUS"save ", 5);
1037 g = string_get_localpart(addr, g);
1040 /* Other deliveries start with the full address. It we have split it into local
1041 part and domain, use those fields. Some early failures can happen before the
1042 splitting is done; in those cases use the original field. */
1047 int off = gstring_length(g); /* start of the "full address" */
1049 if (addr->local_part)
1052 g = string_get_localpart(addr, g);
1053 g = string_catn(g, US"@", 1);
1056 if (testflag(addr, af_utf8_downcvt))
1057 s = string_localpart_utf8_to_alabel(s, NULL);
1059 g = string_cat(g, s);
1062 g = string_cat(g, addr->address);
1064 /* If the address we are going to print is the same as the top address,
1065 and all parents are not being included, don't add on the top address. First
1066 of all, do a caseless comparison; if this succeeds, do a caseful comparison
1067 on the local parts. */
1069 cmp = g->s + off; /* only now, as rebuffer likely done */
1070 string_from_gstring(g); /* ensure nul-terminated */
1071 if ( strcmpic(cmp, topaddr->address) == 0
1072 && Ustrncmp(cmp, topaddr->address, Ustrchr(cmp, '@') - cmp) == 0
1073 && !addr->onetime_parent
1074 && (!all_parents || !addr->parent || addr->parent == topaddr)
1076 add_topaddr = FALSE;
1079 /* If all parents are requested, or this is a local pipe/file/reply, and
1080 there is at least one intermediate parent, show it in brackets, and continue
1081 with all of them if all are wanted. */
1083 if ( (all_parents || testflag(addr, af_pfr))
1085 && addr->parent != topaddr)
1088 for (address_item * addr2 = addr->parent; addr2 != topaddr; addr2 = addr2->parent)
1090 g = string_catn(g, s, 2);
1091 g = string_cat (g, addr2->address);
1092 if (!all_parents) break;
1095 g = string_catn(g, US")", 1);
1098 /* Add the top address if it is required */
1101 g = string_append(g, 3,
1103 addr->onetime_parent ? addr->onetime_parent : topaddr->address,
1111 /******************************************************************************/
1115 /* If msg is NULL this is a delivery log and logchar is used. Otherwise
1116 this is a nonstandard call; no two-character delivery flag is written
1117 but sender-host and sender are prefixed and "msg" is inserted in the log line.
1120 flags passed to log_write()
1123 delivery_log(int flags, address_item * addr, int logchar, uschar * msg)
1125 gstring * g; /* Used for a temporary, expanding buffer, for building log lines */
1128 /* Log the delivery on the main log. We use an extensible string to build up
1129 the log line, and reset the store afterwards. Remote deliveries should always
1130 have a pointer to the host item that succeeded; local deliveries can have a
1131 pointer to a single host item in their host list, for use by the transport. */
1133 #ifndef DISABLE_EVENT
1134 /* presume no successful remote delivery */
1135 lookup_dnssec_authenticated = NULL;
1138 reset_point = store_mark();
1139 g = string_get_tainted(256, GET_TAINTED); /* addrs will be tainted, so avoid copy */
1142 g = string_append(g, 2, host_and_ident(TRUE), US" ");
1145 g->s[0] = logchar; g->ptr = 1;
1146 g = string_catn(g, US"> ", 2);
1148 g = string_log_address(g, addr, LOGGING(all_parents), TRUE);
1150 if (LOGGING(sender_on_delivery) || msg)
1151 g = string_append(g, 3, US" F=<",
1153 testflag(addr, af_utf8_downcvt)
1154 ? string_address_utf8_to_alabel(sender_address, NULL)
1161 g = string_append(g, 2, US" Q=", queue_name);
1163 /* You might think that the return path must always be set for a successful
1164 delivery; indeed, I did for some time, until this statement crashed. The case
1165 when it is not set is for a delivery to /dev/null which is optimised by not
1166 being run at all. */
1168 if (used_return_path && LOGGING(return_path_on_delivery))
1169 g = string_append(g, 3, US" P=<", used_return_path, US">");
1172 g = string_append(g, 2, US" ", msg);
1174 /* For a delivery from a system filter, there may not be a router */
1176 g = string_append(g, 2, US" R=", addr->router->name);
1178 g = string_append(g, 2, US" T=", addr->transport->name);
1180 if (LOGGING(delivery_size))
1181 g = string_fmt_append(g, " S=%d", transport_count);
1183 /* Local delivery */
1185 if (addr->transport->info->local)
1187 if (addr->host_list)
1188 g = string_append(g, 2, US" H=", addr->host_list->name);
1189 g = d_log_interface(g);
1190 if (addr->shadow_message)
1191 g = string_cat(g, addr->shadow_message);
1194 /* Remote delivery */
1198 if (addr->host_used)
1200 g = d_hostlog(g, addr);
1202 #ifndef DISABLE_EVENT
1203 deliver_host_address = addr->host_used->address;
1204 deliver_host_port = addr->host_used->port;
1205 deliver_host = addr->host_used->name;
1207 /* DNS lookup status */
1208 lookup_dnssec_authenticated = addr->host_used->dnssec==DS_YES ? US"yes"
1209 : addr->host_used->dnssec==DS_NO ? US"no"
1215 g = d_tlslog(g, addr);
1218 if (addr->authenticator)
1220 g = string_append(g, 2, US" A=", addr->authenticator);
1223 g = string_append(g, 2, US":", addr->auth_id);
1224 if (LOGGING(smtp_mailauth) && addr->auth_sndr)
1225 g = string_append(g, 2, US":", addr->auth_sndr);
1229 if (LOGGING(pipelining))
1231 if (testflag(addr, af_pipelining))
1232 g = string_catn(g, US" L", 2);
1233 #ifndef DISABLE_PIPE_CONNECT
1234 if (testflag(addr, af_early_pipe))
1235 g = string_catn(g, US"*", 1);
1239 #ifndef DISABLE_PRDR
1240 if (testflag(addr, af_prdr_used))
1241 g = string_catn(g, US" PRDR", 5);
1244 if (testflag(addr, af_chunking_used))
1245 g = string_catn(g, US" K", 2);
1248 /* confirmation message (SMTP (host_used) and LMTP (driver_name)) */
1250 if ( LOGGING(smtp_confirmation)
1252 && (addr->host_used || Ustrcmp(addr->transport->driver_name, "lmtp") == 0)
1255 unsigned lim = big_buffer_size < 1024 ? big_buffer_size : 1024;
1256 uschar *p = big_buffer;
1257 uschar *ss = addr->message;
1259 for (int i = 0; i < lim && ss[i] != 0; i++) /* limit logged amount */
1261 if (ss[i] == '\"' || ss[i] == '\\') *p++ = '\\'; /* quote \ and " */
1266 g = string_append(g, 2, US" C=", big_buffer);
1269 /* Time on queue and actual time taken to deliver */
1271 if (LOGGING(queue_time))
1272 g = string_append(g, 2, US" QT=", string_timesince(
1273 LOGGING(queue_time_exclusive) ? &received_time_complete : &received_time));
1275 if (LOGGING(deliver_time))
1276 g = string_append(g, 2, US" DT=", string_timediff(&addr->delivery_time));
1278 /* string_cat() always leaves room for the terminator. Release the
1279 store we used to build the line after writing it. */
1281 log_write(0, flags, "%s", string_from_gstring(g));
1283 #ifndef DISABLE_EVENT
1284 if (!msg) msg_event_raise(US"msg:delivery", addr);
1287 store_reset(reset_point);
1294 deferral_log(address_item * addr, uschar * now,
1295 int logflags, uschar * driver_name, uschar * driver_kind)
1297 rmark reset_point = store_mark();
1298 gstring * g = string_get(256);
1300 /* Build up the line that is used for both the message log and the main
1303 /* Create the address string for logging. Must not do this earlier, because
1304 an OK result may be changed to FAIL when a pipe returns text. */
1306 g = string_log_address(g, addr, LOGGING(all_parents), FALSE);
1309 g = string_append(g, 2, US" Q=", queue_name);
1311 /* Either driver_name contains something and driver_kind contains
1312 " router" or " transport" (note the leading space), or driver_name is
1313 a null string and driver_kind contains "routing" without the leading
1314 space, if all routing has been deferred. When a domain has been held,
1315 so nothing has been done at all, both variables contain null strings. */
1319 if (driver_kind[1] == 't' && addr->router)
1320 g = string_append(g, 2, US" R=", addr->router->name);
1321 g = string_fmt_append(g, " %c=%s", toupper(driver_kind[1]), driver_name);
1323 else if (driver_kind)
1324 g = string_append(g, 2, US" ", driver_kind);
1326 g = string_fmt_append(g, " defer (%d)", addr->basic_errno);
1328 if (addr->basic_errno > 0)
1329 g = string_append(g, 2, US": ", US strerror(addr->basic_errno));
1331 if (addr->host_used)
1332 g = d_hostlog(g, addr);
1334 if (LOGGING(deliver_time))
1335 g = string_append(g, 2, US" DT=", string_timediff(&addr->delivery_time));
1338 g = string_append(g, 2, US": ", addr->message);
1341 const uschar * s = string_from_gstring(g);
1343 /* Log the deferment in the message log, but don't clutter it
1344 up with retry-time defers after the first delivery attempt. */
1346 if (f.deliver_firsttime || addr->basic_errno > ERRNO_RETRY_BASE)
1347 deliver_msglog("%s %s\n", now, s);
1349 /* Write the main log and reset the store.
1350 For errors of the type "retry time not reached" (also remotes skipped
1351 on queue run), logging is controlled by L_retry_defer. Note that this kind
1352 of error number is negative, and all the retry ones are less than any
1356 log_write(addr->basic_errno <= ERRNO_RETRY_BASE ? L_retry_defer : 0, logflags,
1360 store_reset(reset_point);
1367 failure_log(address_item * addr, uschar * driver_kind, uschar * now)
1369 rmark reset_point = store_mark();
1370 gstring * g = string_get(256);
1372 #ifndef DISABLE_EVENT
1373 /* Message failures for which we will send a DSN get their event raised
1374 later so avoid doing it here. */
1376 if ( !addr->prop.ignore_error
1377 && !(addr->dsn_flags & (rf_dsnflags & ~rf_notify_failure))
1379 msg_event_raise(US"msg:fail:delivery", addr);
1382 /* Build up the log line for the message and main logs */
1384 /* Create the address string for logging. Must not do this earlier, because
1385 an OK result may be changed to FAIL when a pipe returns text. */
1387 g = string_log_address(g, addr, LOGGING(all_parents), FALSE);
1389 if (LOGGING(sender_on_delivery))
1390 g = string_append(g, 3, US" F=<", sender_address, US">");
1393 g = string_append(g, 2, US" Q=", queue_name);
1395 /* Return path may not be set if no delivery actually happened */
1397 if (used_return_path && LOGGING(return_path_on_delivery))
1398 g = string_append(g, 3, US" P=<", used_return_path, US">");
1401 g = string_append(g, 2, US" R=", addr->router->name);
1402 if (addr->transport)
1403 g = string_append(g, 2, US" T=", addr->transport->name);
1405 if (addr->host_used)
1406 g = d_hostlog(g, addr);
1409 g = d_tlslog(g, addr);
1412 if (addr->basic_errno > 0)
1413 g = string_append(g, 2, US": ", US strerror(addr->basic_errno));
1416 g = string_append(g, 2, US": ", addr->message);
1418 if (LOGGING(deliver_time))
1419 g = string_append(g, 2, US" DT=", string_timediff(&addr->delivery_time));
1421 /* Do the logging. For the message log, "routing failed" for those cases,
1422 just to make it clearer. */
1425 const uschar * s = string_from_gstring(g);
1428 deliver_msglog("%s %s failed for %s\n", now, driver_kind, s);
1430 deliver_msglog("%s %s\n", now, s);
1432 log_write(0, LOG_MAIN, "** %s", s);
1435 store_reset(reset_point);
1441 /*************************************************
1442 * Actions at the end of handling an address *
1443 *************************************************/
1445 /* This is a function for processing a single address when all that can be done
1446 with it has been done.
1449 addr points to the address block
1450 result the result of the delivery attempt
1451 logflags flags for log_write() (LOG_MAIN and/or LOG_PANIC)
1452 driver_type indicates which type of driver (transport, or router) was last
1453 to process the address
1454 logchar '=' or '-' for use when logging deliveries with => or ->
1460 post_process_one(address_item * addr, int result, int logflags, int driver_type,
1463 uschar * now = tod_stamp(tod_log);
1464 uschar * driver_kind = NULL;
1465 uschar * driver_name = NULL;
1467 DEBUG(D_deliver) debug_printf("post-process %s (%d)\n", addr->address, result);
1469 /* Set up driver kind and name for logging. Disable logging if the router or
1470 transport has disabled it. */
1472 if (driver_type == EXIM_DTYPE_TRANSPORT)
1474 if (addr->transport)
1476 driver_name = addr->transport->name;
1477 driver_kind = US" transport";
1478 f.disable_logging = addr->transport->disable_logging;
1480 else driver_kind = US"transporting";
1482 else if (driver_type == EXIM_DTYPE_ROUTER)
1486 driver_name = addr->router->name;
1487 driver_kind = US" router";
1488 f.disable_logging = addr->router->disable_logging;
1490 else driver_kind = US"routing";
1493 /* If there's an error message set, ensure that it contains only printing
1494 characters - it should, but occasionally things slip in and this at least
1495 stops the log format from getting wrecked. We also scan the message for an LDAP
1496 expansion item that has a password setting, and flatten the password. This is a
1497 fudge, but I don't know a cleaner way of doing this. (If the item is badly
1498 malformed, it won't ever have gone near LDAP.) */
1502 const uschar * s = string_printing(addr->message);
1504 /* deconst cast ok as string_printing known to have alloc'n'copied */
1505 addr->message = expand_hide_passwords(US s);
1508 /* If we used a transport that has one of the "return_output" options set, and
1509 if it did in fact generate some output, then for return_output we treat the
1510 message as failed if it was not already set that way, so that the output gets
1511 returned to the sender, provided there is a sender to send it to. For
1512 return_fail_output, do this only if the delivery failed. Otherwise we just
1513 unlink the file, and remove the name so that if the delivery failed, we don't
1514 try to send back an empty or unwanted file. The log_output options operate only
1515 on a non-empty file.
1517 In any case, we close the message file, because we cannot afford to leave a
1518 file-descriptor for one address while processing (maybe very many) others. */
1520 if (addr->return_file >= 0 && addr->return_filename)
1522 BOOL return_output = FALSE;
1523 struct stat statbuf;
1524 (void)EXIMfsync(addr->return_file);
1526 /* If there is no output, do nothing. */
1528 if (fstat(addr->return_file, &statbuf) == 0 && statbuf.st_size > 0)
1530 transport_instance *tb = addr->transport;
1532 /* Handle logging options */
1535 || result == FAIL && tb->log_fail_output
1536 || result == DEFER && tb->log_defer_output
1540 FILE *f = Ufopen(addr->return_filename, "rb");
1542 log_write(0, LOG_MAIN|LOG_PANIC, "failed to open %s to log output "
1543 "from %s transport: %s", addr->return_filename, tb->name,
1546 if ((s = US Ufgets(big_buffer, big_buffer_size, f)))
1548 uschar *p = big_buffer + Ustrlen(big_buffer);
1550 while (p > big_buffer && isspace(p[-1])) p--;
1552 sp = string_printing(big_buffer);
1553 log_write(0, LOG_MAIN, "<%s>: %s transport output: %s",
1554 addr->address, tb->name, sp);
1559 /* Handle returning options, but only if there is an address to return
1562 if (sender_address[0] != 0 || addr->prop.errors_address)
1563 if (tb->return_output)
1565 addr->transport_return = result = FAIL;
1566 if (addr->basic_errno == 0 && !addr->message)
1567 addr->message = US"return message generated";
1568 return_output = TRUE;
1571 if (tb->return_fail_output && result == FAIL) return_output = TRUE;
1574 /* Get rid of the file unless it might be returned, but close it in
1579 Uunlink(addr->return_filename);
1580 addr->return_filename = NULL;
1581 addr->return_file = -1;
1584 (void)close(addr->return_file);
1587 /* Check if the transport notifed continue-conn status explicitly, and
1588 update our knowlege. */
1590 if (testflag(addr, af_new_conn)) continue_sequence = 1;
1591 else if (testflag(addr, af_cont_conn)) continue_sequence++;
1593 /* The success case happens only after delivery by a transport. */
1597 addr->next = addr_succeed;
1598 addr_succeed = addr;
1600 /* Call address_done() to ensure that we don't deliver to this address again,
1601 and write appropriate things to the message log. If it is a child address, we
1602 call child_done() to scan the ancestors and mark them complete if this is the
1603 last child to complete. */
1605 address_done(addr, now);
1606 DEBUG(D_deliver) debug_printf("%s delivered\n", addr->address);
1609 deliver_msglog("%s %s: %s%s succeeded\n", now, addr->address,
1610 driver_name, driver_kind);
1613 deliver_msglog("%s %s <%s>: %s%s succeeded\n", now, addr->address,
1614 addr->parent->address, driver_name, driver_kind);
1615 child_done(addr, now);
1618 /* Certificates for logging (via events) */
1620 tls_out.ourcert = addr->ourcert;
1621 addr->ourcert = NULL;
1622 tls_out.peercert = addr->peercert;
1623 addr->peercert = NULL;
1625 tls_out.ver = addr->tlsver;
1626 tls_out.cipher = addr->cipher;
1627 tls_out.peerdn = addr->peerdn;
1628 tls_out.ocsp = addr->ocsp;
1629 # ifdef SUPPORT_DANE
1630 tls_out.dane_verified = testflag(addr, af_dane_verified);
1634 delivery_log(LOG_MAIN, addr, logchar, NULL);
1637 tls_free_cert(&tls_out.ourcert);
1638 tls_free_cert(&tls_out.peercert);
1640 tls_out.cipher = NULL;
1641 tls_out.peerdn = NULL;
1642 tls_out.ocsp = OCSP_NOT_REQ;
1643 # ifdef SUPPORT_DANE
1644 tls_out.dane_verified = FALSE;
1650 /* Soft failure, or local delivery process failed; freezing may be
1653 else if (result == DEFER || result == PANIC)
1655 if (result == PANIC) logflags |= LOG_PANIC;
1657 /* This puts them on the chain in reverse order. Do not change this, because
1658 the code for handling retries assumes that the one with the retry
1659 information is last. */
1661 addr->next = addr_defer;
1664 /* The only currently implemented special action is to freeze the
1665 message. Logging of this is done later, just before the -H file is
1668 if (addr->special_action == SPECIAL_FREEZE)
1670 f.deliver_freeze = TRUE;
1671 deliver_frozen_at = time(NULL);
1672 update_spool = TRUE;
1675 /* If doing a 2-stage queue run, we skip writing to either the message
1676 log or the main log for SMTP defers. */
1678 if (!f.queue_2stage || addr->basic_errno != 0)
1679 deferral_log(addr, now, logflags, driver_name, driver_kind);
1683 /* Hard failure. If there is an address to which an error message can be sent,
1684 put this address on the failed list. If not, put it on the deferred list and
1685 freeze the mail message for human attention. The latter action can also be
1686 explicitly requested by a router or transport. */
1690 /* If this is a delivery error, or a message for which no replies are
1691 wanted, and the message's age is greater than ignore_bounce_errors_after,
1692 force the af_ignore_error flag. This will cause the address to be discarded
1693 later (with a log entry). */
1695 if (!*sender_address && message_age >= ignore_bounce_errors_after)
1696 addr->prop.ignore_error = TRUE;
1698 /* Freeze the message if requested, or if this is a bounce message (or other
1699 message with null sender) and this address does not have its own errors
1700 address. However, don't freeze if errors are being ignored. The actual code
1701 to ignore occurs later, instead of sending a message. Logging of freezing
1702 occurs later, just before writing the -H file. */
1704 if ( !addr->prop.ignore_error
1705 && ( addr->special_action == SPECIAL_FREEZE
1706 || (sender_address[0] == 0 && !addr->prop.errors_address)
1709 frozen_info = addr->special_action == SPECIAL_FREEZE
1711 : f.sender_local && !f.local_error_message
1712 ? US" (message created with -f <>)"
1713 : US" (delivery error message)";
1714 f.deliver_freeze = TRUE;
1715 deliver_frozen_at = time(NULL);
1716 update_spool = TRUE;
1718 /* The address is put on the defer rather than the failed queue, because
1719 the message is being retained. */
1721 addr->next = addr_defer;
1725 /* Don't put the address on the nonrecipients tree yet; wait until an
1726 error message has been successfully sent. */
1730 addr->next = addr_failed;
1734 failure_log(addr, driver_name ? NULL : driver_kind, now);
1737 /* Ensure logging is turned on again in all cases */
1739 f.disable_logging = FALSE;
1745 /*************************************************
1746 * Address-independent error *
1747 *************************************************/
1749 /* This function is called when there's an error that is not dependent on a
1750 particular address, such as an expansion string failure. It puts the error into
1751 all the addresses in a batch, logs the incident on the main and panic logs, and
1752 clears the expansions. It is mostly called from local_deliver(), but can be
1753 called for a remote delivery via findugid().
1756 logit TRUE if (MAIN+PANIC) logging required
1757 addr the first of the chain of addresses
1759 format format string for error message, or NULL if already set in addr
1760 ... arguments for the format
1766 common_error(BOOL logit, address_item *addr, int code, uschar *format, ...)
1768 addr->basic_errno = code;
1775 va_start(ap, format);
1776 g = string_vformat(NULL, SVFMT_EXTEND|SVFMT_REBUFFER, CS format, ap);
1778 addr->message = string_from_gstring(g);
1781 for (address_item * addr2 = addr->next; addr2; addr2 = addr2->next)
1783 addr2->basic_errno = code;
1784 addr2->message = addr->message;
1787 if (logit) log_write(0, LOG_MAIN|LOG_PANIC, "%s", addr->message);
1788 deliver_set_expansions(NULL);
1794 /*************************************************
1795 * Check a "never users" list *
1796 *************************************************/
1798 /* This function is called to check whether a uid is on one of the two "never
1802 uid the uid to be checked
1803 nusers the list to be scanned; the first item in the list is the count
1805 Returns: TRUE if the uid is on the list
1809 check_never_users(uid_t uid, uid_t *nusers)
1811 if (!nusers) return FALSE;
1812 for (int i = 1; i <= (int)(nusers[0]); i++) if (nusers[i] == uid) return TRUE;
1818 /*************************************************
1819 * Find uid and gid for a transport *
1820 *************************************************/
1822 /* This function is called for both local and remote deliveries, to find the
1823 uid/gid under which to run the delivery. The values are taken preferentially
1824 from the transport (either explicit or deliver_as_creator), then from the
1825 address (i.e. the router), and if nothing is set, the exim uid/gid are used. If
1826 the resulting uid is on the "never_users" or the "fixed_never_users" list, a
1827 panic error is logged, and the function fails (which normally leads to delivery
1831 addr the address (possibly a chain)
1833 uidp pointer to uid field
1834 gidp pointer to gid field
1835 igfp pointer to the use_initgroups field
1837 Returns: FALSE if failed - error has been set in address(es)
1841 findugid(address_item *addr, transport_instance *tp, uid_t *uidp, gid_t *gidp,
1845 BOOL gid_set = FALSE;
1847 /* Default initgroups flag comes from the transport */
1849 *igfp = tp->initgroups;
1851 /* First see if there's a gid on the transport, either fixed or expandable.
1852 The expanding function always logs failure itself. */
1859 else if (tp->expand_gid)
1861 if (!route_find_expanded_group(tp->expand_gid, tp->name, US"transport", gidp,
1864 common_error(FALSE, addr, ERRNO_GIDFAIL, NULL);
1870 /* If the transport did not set a group, see if the router did. */
1872 if (!gid_set && testflag(addr, af_gid_set))
1878 /* Pick up a uid from the transport if one is set. */
1880 if (tp->uid_set) *uidp = tp->uid;
1882 /* Otherwise, try for an expandable uid field. If it ends up as a numeric id,
1883 it does not provide a passwd value from which a gid can be taken. */
1885 else if (tp->expand_uid)
1888 if (!route_find_expanded_user(tp->expand_uid, tp->name, US"transport", &pw,
1889 uidp, &(addr->message)))
1891 common_error(FALSE, addr, ERRNO_UIDFAIL, NULL);
1901 /* If the transport doesn't set the uid, test the deliver_as_creator flag. */
1903 else if (tp->deliver_as_creator)
1905 *uidp = originator_uid;
1908 *gidp = originator_gid;
1913 /* Otherwise see if the address specifies the uid and if so, take it and its
1916 else if (testflag(addr, af_uid_set))
1919 *igfp = testflag(addr, af_initgroups);
1922 /* Nothing has specified the uid - default to the Exim user, and group if the
1935 /* If no gid is set, it is a disaster. We default to the Exim gid only if
1936 defaulting to the Exim uid. In other words, if the configuration has specified
1937 a uid, it must also provide a gid. */
1941 common_error(TRUE, addr, ERRNO_GIDFAIL, US"User set without group for "
1942 "%s transport", tp->name);
1946 /* Check that the uid is not on the lists of banned uids that may not be used
1947 for delivery processes. */
1949 nuname = check_never_users(*uidp, never_users)
1951 : check_never_users(*uidp, fixed_never_users)
1952 ? US"fixed_never_users"
1956 common_error(TRUE, addr, ERRNO_UIDFAIL, US"User %ld set for %s transport "
1957 "is on the %s list", (long int)(*uidp), tp->name, nuname);
1969 /*************************************************
1970 * Check the size of a message for a transport *
1971 *************************************************/
1973 /* Checks that the message isn't too big for the selected transport.
1974 This is called only when it is known that the limit is set.
1978 addr the (first) address being delivered
1981 DEFER expansion failed or did not yield an integer
1982 FAIL message too big
1986 check_message_size(transport_instance *tp, address_item *addr)
1991 deliver_set_expansions(addr);
1992 size_limit = expand_string_integer(tp->message_size_limit, TRUE);
1993 deliver_set_expansions(NULL);
1995 if (expand_string_message)
1998 addr->message = size_limit == -1
1999 ? string_sprintf("failed to expand message_size_limit "
2000 "in %s transport: %s", tp->name, expand_string_message)
2001 : string_sprintf("invalid message_size_limit "
2002 "in %s transport: %s", tp->name, expand_string_message);
2004 else if (size_limit > 0 && message_size > size_limit)
2008 string_sprintf("message is too big (transport limit = %d)",
2017 /*************************************************
2018 * Transport-time check for a previous delivery *
2019 *************************************************/
2021 /* Check that this base address hasn't previously been delivered to its routed
2022 transport. If it has been delivered, mark it done. The check is necessary at
2023 delivery time in order to handle homonymic addresses correctly in cases where
2024 the pattern of redirection changes between delivery attempts (so the unique
2025 fields change). Non-homonymic previous delivery is detected earlier, at routing
2026 time (which saves unnecessary routing).
2029 addr the address item
2030 testing TRUE if testing wanted only, without side effects
2032 Returns: TRUE if previously delivered by the transport
2036 previously_transported(address_item *addr, BOOL testing)
2038 uschar * s = string_sprintf("%s/%s",
2039 addr->unique + (testflag(addr, af_homonym)? 3:0), addr->transport->name);
2041 if (tree_search(tree_nonrecipients, s) != 0)
2043 DEBUG(D_deliver|D_route|D_transport)
2044 debug_printf("%s was previously delivered (%s transport): discarded\n",
2045 addr->address, addr->transport->name);
2046 if (!testing) child_done(addr, tod_stamp(tod_log));
2055 /******************************************************
2056 * Check for a given header in a header string *
2057 ******************************************************/
2059 /* This function is used when generating quota warnings. The configuration may
2060 specify any header lines it likes in quota_warn_message. If certain of them are
2061 missing, defaults are inserted, so we need to be able to test for the presence
2065 hdr the required header name
2066 hstring the header string
2068 Returns: TRUE the header is in the string
2069 FALSE the header is not in the string
2073 contains_header(uschar *hdr, uschar *hstring)
2075 int len = Ustrlen(hdr);
2076 uschar *p = hstring;
2079 if (strncmpic(p, hdr, len) == 0)
2082 while (*p == ' ' || *p == '\t') p++;
2083 if (*p == ':') return TRUE;
2085 while (*p != 0 && *p != '\n') p++;
2086 if (*p == '\n') p++;
2094 /*************************************************
2095 * Perform a local delivery *
2096 *************************************************/
2098 /* Each local delivery is performed in a separate process which sets its
2099 uid and gid as specified. This is a safer way than simply changing and
2100 restoring using seteuid(); there is a body of opinion that seteuid()
2101 cannot be used safely. From release 4, Exim no longer makes any use of
2102 it for delivery. Besides, not all systems have seteuid().
2104 If the uid/gid are specified in the transport_instance, they are used; the
2105 transport initialization must ensure that either both or neither are set.
2106 Otherwise, the values associated with the address are used. If neither are set,
2107 it is a configuration error.
2109 The transport or the address may specify a home directory (transport over-
2110 rides), and if they do, this is set as $home. If neither have set a working
2111 directory, this value is used for that as well. Otherwise $home is left unset
2112 and the cwd is set to "/" - a directory that should be accessible to all users.
2114 Using a separate process makes it more complicated to get error information
2115 back. We use a pipe to pass the return code and also an error code and error
2116 text string back to the parent process.
2119 addr points to an address block for this delivery; for "normal" local
2120 deliveries this is the only address to be delivered, but for
2121 pseudo-remote deliveries (e.g. by batch SMTP to a file or pipe)
2122 a number of addresses can be handled simultaneously, and in this
2123 case addr will point to a chain of addresses with the same
2126 shadowing TRUE if running a shadow transport; this causes output from pipes
2133 deliver_local(address_item *addr, BOOL shadowing)
2135 BOOL use_initgroups;
2138 int status, len, rc;
2141 uschar *working_directory;
2142 address_item *addr2;
2143 transport_instance *tp = addr->transport;
2145 /* Set up the return path from the errors or sender address. If the transport
2146 has its own return path setting, expand it and replace the existing value. */
2148 if(addr->prop.errors_address)
2149 return_path = addr->prop.errors_address;
2151 return_path = sender_address;
2153 if (tp->return_path)
2155 uschar * new_return_path = expand_string(tp->return_path);
2156 if (new_return_path)
2157 return_path = new_return_path;
2158 else if (!f.expand_string_forcedfail)
2160 common_error(TRUE, addr, ERRNO_EXPANDFAIL,
2161 US"Failed to expand return path \"%s\" in %s transport: %s",
2162 tp->return_path, tp->name, expand_string_message);
2167 /* For local deliveries, one at a time, the value used for logging can just be
2168 set directly, once and for all. */
2170 used_return_path = return_path;
2172 /* Sort out the uid, gid, and initgroups flag. If an error occurs, the message
2173 gets put into the address(es), and the expansions are unset, so we can just
2176 if (!findugid(addr, tp, &uid, &gid, &use_initgroups)) return;
2178 /* See if either the transport or the address specifies a home directory. A
2179 home directory set in the address may already be expanded; a flag is set to
2180 indicate that. In other cases we must expand it. */
2182 if ( (deliver_home = tp->home_dir) /* Set in transport, or */
2183 || ( (deliver_home = addr->home_dir) /* Set in address and */
2184 && !testflag(addr, af_home_expanded) /* not expanded */
2187 uschar *rawhome = deliver_home;
2188 deliver_home = NULL; /* in case it contains $home */
2189 if (!(deliver_home = expand_string(rawhome)))
2191 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"home directory \"%s\" failed "
2192 "to expand for %s transport: %s", rawhome, tp->name,
2193 expand_string_message);
2196 if (*deliver_home != '/')
2198 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"home directory path \"%s\" "
2199 "is not absolute for %s transport", deliver_home, tp->name);
2204 /* See if either the transport or the address specifies a current directory,
2205 and if so, expand it. If nothing is set, use the home directory, unless it is
2206 also unset in which case use "/", which is assumed to be a directory to which
2207 all users have access. It is necessary to be in a visible directory for some
2208 operating systems when running pipes, as some commands (e.g. "rm" under Solaris
2209 2.5) require this. */
2211 working_directory = tp->current_dir ? tp->current_dir : addr->current_dir;
2212 if (working_directory)
2214 uschar *raw = working_directory;
2215 if (!(working_directory = expand_string(raw)))
2217 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"current directory \"%s\" "
2218 "failed to expand for %s transport: %s", raw, tp->name,
2219 expand_string_message);
2222 if (*working_directory != '/')
2224 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"current directory path "
2225 "\"%s\" is not absolute for %s transport", working_directory, tp->name);
2229 else working_directory = deliver_home ? deliver_home : US"/";
2231 /* If one of the return_output flags is set on the transport, create and open a
2232 file in the message log directory for the transport to write its output onto.
2233 This is mainly used by pipe transports. The file needs to be unique to the
2234 address. This feature is not available for shadow transports. */
2237 && ( tp->return_output || tp->return_fail_output
2238 || tp->log_output || tp->log_fail_output || tp->log_defer_output
2243 addr->return_filename =
2244 spool_fname(US"msglog", message_subdir, message_id,
2245 string_sprintf("-%d-%d", getpid(), return_count++));
2247 if ((addr->return_file = open_msglog_file(addr->return_filename, 0400, &error)) < 0)
2249 common_error(TRUE, addr, errno, US"Unable to %s file for %s transport "
2250 "to return message: %s", error, tp->name, strerror(errno));
2255 /* Create the pipe for inter-process communication. */
2259 common_error(TRUE, addr, ERRNO_PIPEFAIL, US"Creation of pipe failed: %s",
2264 /* Now fork the process to do the real work in the subprocess, but first
2265 ensure that all cached resources are freed so that the subprocess starts with
2266 a clean slate and doesn't interfere with the parent process. */
2270 if ((pid = exim_fork(US"delivery-local")) == 0)
2272 BOOL replicate = TRUE;
2274 /* Prevent core dumps, as we don't want them in users' home directories.
2275 HP-UX doesn't have RLIMIT_CORE; I don't know how to do this in that
2276 system. Some experimental/developing systems (e.g. GNU/Hurd) may define
2277 RLIMIT_CORE but not support it in setrlimit(). For such systems, do not
2278 complain if the error is "not supported".
2280 There are two scenarios where changing the max limit has an effect. In one,
2281 the user is using a .forward and invoking a command of their choice via pipe;
2282 for these, we do need the max limit to be 0 unless the admin chooses to
2283 permit an increased limit. In the other, the command is invoked directly by
2284 the transport and is under administrator control, thus being able to raise
2285 the limit aids in debugging. So there's no general always-right answer.
2287 Thus we inhibit core-dumps completely but let individual transports, while
2288 still root, re-raise the limits back up to aid debugging. We make the
2289 default be no core-dumps -- few enough people can use core dumps in
2290 diagnosis that it's reasonable to make them something that has to be explicitly requested.
2297 if (setrlimit(RLIMIT_CORE, &rl) < 0)
2299 # ifdef SETRLIMIT_NOT_SUPPORTED
2300 if (errno != ENOSYS && errno != ENOTSUP)
2302 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_CORE) failed: %s",
2307 /* Reset the random number generator, so different processes don't all
2308 have the same sequence. */
2312 /* If the transport has a setup entry, call this first, while still
2313 privileged. (Appendfile uses this to expand quota, for example, while
2314 able to read private files.) */
2316 if (addr->transport->setup)
2317 switch((addr->transport->setup)(addr->transport, addr, NULL, uid, gid,
2321 addr->transport_return = DEFER;
2325 addr->transport_return = PANIC;
2329 /* Ignore SIGINT and SIGTERM during delivery. Also ignore SIGUSR1, as
2330 when the process becomes unprivileged, it won't be able to write to the
2331 process log. SIGHUP is ignored throughout exim, except when it is being
2334 signal(SIGINT, SIG_IGN);
2335 signal(SIGTERM, SIG_IGN);
2336 signal(SIGUSR1, SIG_IGN);
2338 /* Close the unwanted half of the pipe, and set close-on-exec for the other
2339 half - for transports that exec things (e.g. pipe). Then set the required
2342 (void)close(pfd[pipe_read]);
2343 (void)fcntl(pfd[pipe_write], F_SETFD, fcntl(pfd[pipe_write], F_GETFD) |
2345 exim_setugid(uid, gid, use_initgroups,
2346 string_sprintf("local delivery to %s <%s> transport=%s", addr->local_part,
2347 addr->address, addr->transport->name));
2351 debug_printf(" home=%s current=%s\n", deliver_home, working_directory);
2352 for (address_item * batched = addr->next; batched; batched = batched->next)
2353 debug_printf("additional batched address: %s\n", batched->address);
2356 /* Set an appropriate working directory. */
2358 if (Uchdir(working_directory) < 0)
2360 addr->transport_return = DEFER;
2361 addr->basic_errno = errno;
2362 addr->message = string_sprintf("failed to chdir to %s", working_directory);
2365 /* If successful, call the transport */
2370 set_process_info("delivering %s to %s using %s", message_id,
2371 addr->local_part, tp->name);
2373 /* Setting these globals in the subprocess means we need never clear them */
2374 transport_name = addr->transport->name;
2375 driver_srcfile = tp->srcfile;
2376 driver_srcline = tp->srcline;
2378 /* If a transport filter has been specified, set up its argument list.
2379 Any errors will get put into the address, and FALSE yielded. */
2381 if (tp->filter_command)
2383 ok = transport_set_up_command(&transport_filter_argv,
2385 TRUE, PANIC, addr, FALSE, US"transport filter", NULL);
2386 transport_filter_timeout = tp->filter_timeout;
2388 else transport_filter_argv = NULL;
2392 debug_print_string(tp->debug_string);
2393 replicate = !(tp->info->code)(addr->transport, addr);
2397 /* Pass the results back down the pipe. If necessary, first replicate the
2398 status in the top address to the others in the batch. The label is the
2399 subject of a goto when a call to the transport's setup function fails. We
2400 pass the pointer to the transport back in case it got changed as a result of
2401 file_format in appendfile. */
2405 if (replicate) replicate_status(addr);
2406 for (addr2 = addr; addr2; addr2 = addr2->next)
2409 int local_part_length = Ustrlen(addr2->local_part);
2413 if( (i = addr2->transport_return, (ret = write(pfd[pipe_write], &i, sizeof(int))) != sizeof(int))
2414 || (ret = write(pfd[pipe_write], &transport_count, sizeof(transport_count))) != sizeof(transport_count)
2415 || (ret = write(pfd[pipe_write], &addr2->flags, sizeof(addr2->flags))) != sizeof(addr2->flags)
2416 || (ret = write(pfd[pipe_write], &addr2->basic_errno, sizeof(int))) != sizeof(int)
2417 || (ret = write(pfd[pipe_write], &addr2->more_errno, sizeof(int))) != sizeof(int)
2418 || (ret = write(pfd[pipe_write], &addr2->delivery_time, sizeof(struct timeval))) != sizeof(struct timeval)
2419 || (i = addr2->special_action, (ret = write(pfd[pipe_write], &i, sizeof(int))) != sizeof(int))
2420 || (ret = write(pfd[pipe_write], &addr2->transport,
2421 sizeof(transport_instance *))) != sizeof(transport_instance *)
2423 /* For a file delivery, pass back the local part, in case the original
2424 was only part of the final delivery path. This gives more complete
2427 || (testflag(addr2, af_file)
2428 && ( (ret = write(pfd[pipe_write], &local_part_length, sizeof(int))) != sizeof(int)
2429 || (ret = write(pfd[pipe_write], addr2->local_part, local_part_length)) != local_part_length
2433 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s",
2434 ret == -1 ? strerror(errno) : "short write");
2436 /* Now any messages */
2438 for (i = 0, s = addr2->message; i < 2; i++, s = addr2->user_message)
2440 int message_length = s ? Ustrlen(s) + 1 : 0;
2441 if( (ret = write(pfd[pipe_write], &message_length, sizeof(int))) != sizeof(int)
2442 || message_length > 0 && (ret = write(pfd[pipe_write], s, message_length)) != message_length
2444 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s",
2445 ret == -1 ? strerror(errno) : "short write");
2449 /* OK, this process is now done. Free any cached resources that it opened,
2450 and close the pipe we were writing down before exiting. */
2452 (void)close(pfd[pipe_write]);
2457 /* Back in the main process: panic if the fork did not succeed. This seems
2458 better than returning an error - if forking is failing it is probably best
2459 not to try other deliveries for this message. */
2462 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Fork failed for local delivery to %s",
2465 /* Read the pipe to get the delivery status codes and error messages. Our copy
2466 of the writing end must be closed first, as otherwise read() won't return zero
2467 on an empty pipe. We check that a status exists for each address before
2468 overwriting the address structure. If data is missing, the default DEFER status
2469 will remain. Afterwards, close the reading end. */
2471 (void)close(pfd[pipe_write]);
2473 for (addr2 = addr; addr2; addr2 = addr2->next)
2475 if ((len = read(pfd[pipe_read], &status, sizeof(int))) > 0)
2480 addr2->transport_return = status;
2481 len = read(pfd[pipe_read], &transport_count,
2482 sizeof(transport_count));
2483 len = read(pfd[pipe_read], &addr2->flags, sizeof(addr2->flags));
2484 len = read(pfd[pipe_read], &addr2->basic_errno, sizeof(int));
2485 len = read(pfd[pipe_read], &addr2->more_errno, sizeof(int));
2486 len = read(pfd[pipe_read], &addr2->delivery_time, sizeof(struct timeval));
2487 len = read(pfd[pipe_read], &i, sizeof(int)); addr2->special_action = i;
2488 len = read(pfd[pipe_read], &addr2->transport,
2489 sizeof(transport_instance *));
2491 if (testflag(addr2, af_file))
2494 if ( read(pfd[pipe_read], &llen, sizeof(int)) != sizeof(int)
2495 || llen > 64*4 /* limit from rfc 5821, times I18N factor */
2498 log_write(0, LOG_MAIN|LOG_PANIC, "bad local_part length read"
2499 " from delivery subprocess");
2502 /* sanity-checked llen so disable the Coverity error */
2503 /* coverity[tainted_data] */
2504 if (read(pfd[pipe_read], big_buffer, llen) != llen)
2506 log_write(0, LOG_MAIN|LOG_PANIC, "bad local_part read"
2507 " from delivery subprocess");
2510 big_buffer[llen] = 0;
2511 addr2->local_part = string_copy(big_buffer);
2514 for (i = 0, sptr = &addr2->message; i < 2; i++, sptr = &addr2->user_message)
2517 len = read(pfd[pipe_read], &message_length, sizeof(int));
2518 if (message_length > 0)
2520 len = read(pfd[pipe_read], big_buffer, message_length);
2521 big_buffer[big_buffer_size-1] = '\0'; /* guard byte */
2522 if (len > 0) *sptr = string_copy(big_buffer);
2529 log_write(0, LOG_MAIN|LOG_PANIC, "failed to read delivery status for %s "
2530 "from delivery subprocess", addr2->unique);
2535 (void)close(pfd[pipe_read]);
2537 /* Unless shadowing, write all successful addresses immediately to the journal
2538 file, to ensure they are recorded asap. For homonymic addresses, use the base
2539 address plus the transport name. Failure to write the journal is panic-worthy,
2540 but don't stop, as it may prove possible subsequently to update the spool file
2541 in order to record the delivery. */
2545 for (addr2 = addr; addr2; addr2 = addr2->next)
2546 if (addr2->transport_return == OK)
2548 if (testflag(addr2, af_homonym))
2549 sprintf(CS big_buffer, "%.500s/%s\n", addr2->unique + 3, tp->name);
2551 sprintf(CS big_buffer, "%.500s\n", addr2->unique);
2553 /* In the test harness, wait just a bit to let the subprocess finish off
2554 any debug output etc first. */
2556 testharness_pause_ms(300);
2558 DEBUG(D_deliver) debug_printf("journalling %s", big_buffer);
2559 len = Ustrlen(big_buffer);
2560 if (write(journal_fd, big_buffer, len) != len)
2561 log_write(0, LOG_MAIN|LOG_PANIC, "failed to update journal for %s: %s",
2562 big_buffer, strerror(errno));
2565 /* Ensure the journal file is pushed out to disk. */
2567 if (EXIMfsync(journal_fd) < 0)
2568 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s",
2572 /* Wait for the process to finish. If it terminates with a non-zero code,
2573 freeze the message (except for SIGTERM, SIGKILL and SIGQUIT), but leave the
2574 status values of all the addresses as they are. Take care to handle the case
2575 when the subprocess doesn't seem to exist. This has been seen on one system
2576 when Exim was called from an MUA that set SIGCHLD to SIG_IGN. When that
2577 happens, wait() doesn't recognize the termination of child processes. Exim now
2578 resets SIGCHLD to SIG_DFL, but this code should still be robust. */
2580 while ((rc = wait(&status)) != pid)
2581 if (rc < 0 && errno == ECHILD) /* Process has vanished */
2583 log_write(0, LOG_MAIN, "%s transport process vanished unexpectedly",
2584 addr->transport->driver_name);
2589 if ((status & 0xffff) != 0)
2591 int msb = (status >> 8) & 255;
2592 int lsb = status & 255;
2593 int code = (msb == 0)? (lsb & 0x7f) : msb;
2594 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
2595 addr->special_action = SPECIAL_FREEZE;
2596 log_write(0, LOG_MAIN|LOG_PANIC, "%s transport process returned non-zero "
2597 "status 0x%04x: %s %d",
2598 addr->transport->driver_name,
2600 msb == 0 ? "terminated by signal" : "exit code",
2604 /* If SPECIAL_WARN is set in the top address, send a warning message. */
2606 if (addr->special_action == SPECIAL_WARN && addr->transport->warn_message)
2609 uschar *warn_message;
2612 DEBUG(D_deliver) debug_printf("Warning message requested by transport\n");
2614 if (!(warn_message = expand_string(addr->transport->warn_message)))
2615 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand \"%s\" (warning "
2616 "message for %s transport): %s", addr->transport->warn_message,
2617 addr->transport->name, expand_string_message);
2619 else if ((pid = child_open_exim(&fd, US"tpt-warning-message")) > 0)
2621 FILE *f = fdopen(fd, "wb");
2622 if (errors_reply_to && !contains_header(US"Reply-To", warn_message))
2623 fprintf(f, "Reply-To: %s\n", errors_reply_to);
2624 fprintf(f, "Auto-Submitted: auto-replied\n");
2625 if (!contains_header(US"From", warn_message))
2627 fprintf(f, "%s", CS warn_message);
2629 /* Close and wait for child process to complete, without a timeout. */
2632 (void)child_close(pid, 0);
2635 addr->special_action = SPECIAL_NONE;
2642 /* Check transport for the given concurrency limit. Return TRUE if over
2643 the limit (or an expansion failure), else FALSE and if there was a limit,
2644 the key for the hints database used for the concurrency count. */
2647 tpt_parallel_check(transport_instance * tp, address_item * addr, uschar ** key)
2649 unsigned max_parallel;
2651 if (!tp->max_parallel) return FALSE;
2653 max_parallel = (unsigned) expand_string_integer(tp->max_parallel, TRUE);
2654 if (expand_string_message)
2656 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand max_parallel option "
2657 "in %s transport (%s): %s", tp->name, addr->address,
2658 expand_string_message);
2662 if (max_parallel > 0)
2664 uschar * serialize_key = string_sprintf("tpt-serialize-%s", tp->name);
2665 if (!enq_start(serialize_key, max_parallel))
2667 address_item * next;
2669 debug_printf("skipping tpt %s because concurrency limit %u reached\n",
2670 tp->name, max_parallel);
2674 addr->message = US"concurrency limit reached for transport";
2675 addr->basic_errno = ERRNO_TRETRY;
2676 post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_TRANSPORT, 0);
2677 } while ((addr = next));
2680 *key = serialize_key;
2687 /*************************************************
2688 * Do local deliveries *
2689 *************************************************/
2691 /* This function processes the list of addresses in addr_local. True local
2692 deliveries are always done one address at a time. However, local deliveries can
2693 be batched up in some cases. Typically this is when writing batched SMTP output
2694 files for use by some external transport mechanism, or when running local
2695 deliveries over LMTP.
2702 do_local_deliveries(void)
2705 open_db *dbm_file = NULL;
2706 time_t now = time(NULL);
2708 /* Loop until we have exhausted the supply of local deliveries */
2712 struct timeval delivery_start;
2713 struct timeval deliver_time;
2714 address_item *addr2, *addr3, *nextaddr;
2715 int logflags = LOG_MAIN;
2716 int logchar = f.dont_deliver? '*' : '=';
2717 transport_instance *tp;
2718 uschar * serialize_key = NULL;
2720 /* Pick the first undelivered address off the chain */
2722 address_item *addr = addr_local;
2723 addr_local = addr->next;
2726 DEBUG(D_deliver|D_transport)
2727 debug_printf("--------> %s <--------\n", addr->address);
2729 /* An internal disaster if there is no transport. Should not occur! */
2731 if (!(tp = addr->transport))
2733 logflags |= LOG_PANIC;
2734 f.disable_logging = FALSE; /* Jic */
2735 addr->message = addr->router
2736 ? string_sprintf("No transport set by %s router", addr->router->name)
2737 : US"No transport set by system filter";
2738 post_process_one(addr, DEFER, logflags, EXIM_DTYPE_TRANSPORT, 0);
2742 /* Check that this base address hasn't previously been delivered to this
2743 transport. The check is necessary at this point to handle homonymic addresses
2744 correctly in cases where the pattern of redirection changes between delivery
2745 attempts. Non-homonymic previous delivery is detected earlier, at routing
2748 if (previously_transported(addr, FALSE)) continue;
2750 /* There are weird cases where logging is disabled */
2752 f.disable_logging = tp->disable_logging;
2754 /* Check for batched addresses and possible amalgamation. Skip all the work
2755 if either batch_max <= 1 or there aren't any other addresses for local
2758 if (tp->batch_max > 1 && addr_local)
2760 int batch_count = 1;
2761 BOOL uses_dom = readconf_depends((driver_instance *)tp, US"domain");
2762 BOOL uses_lp = ( testflag(addr, af_pfr)
2763 && (testflag(addr, af_file) || addr->local_part[0] == '|')
2765 || readconf_depends((driver_instance *)tp, US"local_part");
2766 uschar *batch_id = NULL;
2767 address_item **anchor = &addr_local;
2768 address_item *last = addr;
2771 /* Expand the batch_id string for comparison with other addresses.
2772 Expansion failure suppresses batching. */
2776 deliver_set_expansions(addr);
2777 batch_id = expand_string(tp->batch_id);
2778 deliver_set_expansions(NULL);
2781 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2782 "in %s transport (%s): %s", tp->name, addr->address,
2783 expand_string_message);
2784 batch_count = tp->batch_max;
2788 /* Until we reach the batch_max limit, pick off addresses which have the
2789 same characteristics. These are:
2792 not previously delivered (see comment about 50 lines above)
2793 same local part if the transport's configuration contains $local_part
2794 or if this is a file or pipe delivery from a redirection
2795 same domain if the transport's configuration contains $domain
2797 same additional headers
2798 same headers to be removed
2799 same uid/gid for running the transport
2800 same first host if a host list is set
2803 while ((next = *anchor) && batch_count < tp->batch_max)
2806 tp == next->transport
2807 && !previously_transported(next, TRUE)
2808 && testflag(addr, af_pfr) == testflag(next, af_pfr)
2809 && testflag(addr, af_file) == testflag(next, af_file)
2810 && (!uses_lp || Ustrcmp(next->local_part, addr->local_part) == 0)
2811 && (!uses_dom || Ustrcmp(next->domain, addr->domain) == 0)
2812 && same_strings(next->prop.errors_address, addr->prop.errors_address)
2813 && same_headers(next->prop.extra_headers, addr->prop.extra_headers)
2814 && same_strings(next->prop.remove_headers, addr->prop.remove_headers)
2815 && same_ugid(tp, addr, next)
2816 && ( !addr->host_list && !next->host_list
2819 && Ustrcmp(addr->host_list->name, next->host_list->name) == 0
2822 /* If the transport has a batch_id setting, batch_id will be non-NULL
2823 from the expansion outside the loop. Expand for this address and compare.
2824 Expansion failure makes this address ineligible for batching. */
2829 address_item *save_nextnext = next->next;
2830 next->next = NULL; /* Expansion for a single address */
2831 deliver_set_expansions(next);
2832 next->next = save_nextnext;
2833 bid = expand_string(tp->batch_id);
2834 deliver_set_expansions(NULL);
2837 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2838 "in %s transport (%s): %s", tp->name, next->address,
2839 expand_string_message);
2842 else ok = (Ustrcmp(batch_id, bid) == 0);
2845 /* Take address into batch if OK. */
2849 *anchor = next->next; /* Include the address */
2855 else anchor = &next->next; /* Skip the address */
2859 /* We now have one or more addresses that can be delivered in a batch. Check
2860 whether the transport is prepared to accept a message of this size. If not,
2861 fail them all forthwith. If the expansion fails, or does not yield an
2862 integer, defer delivery. */
2864 if (tp->message_size_limit)
2866 int rc = check_message_size(tp, addr);
2869 replicate_status(addr);
2873 post_process_one(addr, rc, logflags, EXIM_DTYPE_TRANSPORT, 0);
2876 continue; /* With next batch of addresses */
2880 /* If we are not running the queue, or if forcing, all deliveries will be
2881 attempted. Otherwise, we must respect the retry times for each address. Even
2882 when not doing this, we need to set up the retry key string, and determine
2883 whether a retry record exists, because after a successful delivery, a delete
2884 retry item must be set up. Keep the retry database open only for the duration
2885 of these checks, rather than for all local deliveries, because some local
2886 deliveries (e.g. to pipes) can take a substantial time. */
2888 if (!(dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE, TRUE)))
2889 DEBUG(D_deliver|D_retry|D_hints_lookup)
2890 debug_printf("no retry data available\n");
2896 BOOL ok = TRUE; /* to deliver this address */
2899 /* Set up the retry key to include the domain or not, and change its
2900 leading character from "R" to "T". Must make a copy before doing this,
2901 because the old key may be pointed to from a "delete" retry item after
2904 retry_key = string_copy(
2905 tp->retry_use_local_part ? addr2->address_retry_key :
2906 addr2->domain_retry_key);
2909 /* Inspect the retry data. If there is no hints file, delivery happens. */
2913 dbdata_retry *retry_record = dbfn_read(dbm_file, retry_key);
2915 /* If there is no retry record, delivery happens. If there is,
2916 remember it exists so it can be deleted after a successful delivery. */
2920 setflag(addr2, af_lt_retry_exists);
2922 /* A retry record exists for this address. If queue running and not
2923 forcing, inspect its contents. If the record is too old, or if its
2924 retry time has come, or if it has passed its cutoff time, delivery
2929 debug_printf("retry record exists: age=%s ",
2930 readconf_printtime(now - retry_record->time_stamp));
2931 debug_printf("(max %s)\n", readconf_printtime(retry_data_expire));
2932 debug_printf(" time to retry = %s expired = %d\n",
2933 readconf_printtime(retry_record->next_try - now),
2934 retry_record->expired);
2937 if (f.queue_running && !f.deliver_force)
2939 ok = (now - retry_record->time_stamp > retry_data_expire)
2940 || (now >= retry_record->next_try)
2941 || retry_record->expired;
2943 /* If we haven't reached the retry time, there is one more check
2944 to do, which is for the ultimate address timeout. */
2947 ok = retry_ultimate_address_timeout(retry_key, addr2->domain,
2951 else DEBUG(D_retry) debug_printf("no retry record exists\n");
2954 /* This address is to be delivered. Leave it on the chain. */
2959 addr2 = addr2->next;
2962 /* This address is to be deferred. Take it out of the chain, and
2963 post-process it as complete. Must take it out of the chain first,
2964 because post processing puts it on another chain. */
2968 address_item *this = addr2;
2969 this->message = US"Retry time not yet reached";
2970 this->basic_errno = ERRNO_LRETRY;
2971 addr2 = addr3 ? (addr3->next = addr2->next)
2972 : (addr = addr2->next);
2973 post_process_one(this, DEFER, logflags, EXIM_DTYPE_TRANSPORT, 0);
2977 if (dbm_file) dbfn_close(dbm_file);
2979 /* If there are no addresses left on the chain, they all deferred. Loop
2980 for the next set of addresses. */
2982 if (!addr) continue;
2984 /* If the transport is limited for parallellism, enforce that here.
2985 We use a hints DB entry, incremented here and decremented after
2986 the transport (and any shadow transport) completes. */
2988 if (tpt_parallel_check(tp, addr, &serialize_key))
2990 if (expand_string_message)
2992 logflags |= LOG_PANIC;
2996 post_process_one(addr, DEFER, logflags, EXIM_DTYPE_TRANSPORT, 0);
2997 } while ((addr = addr2));
2999 continue; /* Loop for the next set of addresses. */
3003 /* So, finally, we do have some addresses that can be passed to the
3004 transport. Before doing so, set up variables that are relevant to a
3007 deliver_set_expansions(addr);
3009 gettimeofday(&delivery_start, NULL);
3010 deliver_local(addr, FALSE);
3011 timesince(&deliver_time, &delivery_start);
3013 /* If a shadow transport (which must perforce be another local transport), is
3014 defined, and its condition is met, we must pass the message to the shadow
3015 too, but only those addresses that succeeded. We do this by making a new
3016 chain of addresses - also to keep the original chain uncontaminated. We must
3017 use a chain rather than doing it one by one, because the shadow transport may
3020 NOTE: if the condition fails because of a lookup defer, there is nothing we
3024 && ( !tp->shadow_condition
3025 || expand_check_condition(tp->shadow_condition, tp->name, US"transport")
3028 transport_instance *stp;
3029 address_item *shadow_addr = NULL;
3030 address_item **last = &shadow_addr;
3032 for (stp = transports; stp; stp = stp->next)
3033 if (Ustrcmp(stp->name, tp->shadow) == 0) break;
3036 log_write(0, LOG_MAIN|LOG_PANIC, "shadow transport \"%s\" not found ",
3039 /* Pick off the addresses that have succeeded, and make clones. Put into
3040 the shadow_message field a pointer to the shadow_message field of the real
3043 else for (addr2 = addr; addr2; addr2 = addr2->next)
3044 if (addr2->transport_return == OK)
3046 addr3 = store_get(sizeof(address_item), GET_UNTAINTED);
3049 addr3->shadow_message = US &addr2->shadow_message;
3050 addr3->transport = stp;
3051 addr3->transport_return = DEFER;
3052 addr3->return_filename = NULL;
3053 addr3->return_file = -1;
3055 last = &addr3->next;
3058 /* If we found any addresses to shadow, run the delivery, and stick any
3059 message back into the shadow_message field in the original. */
3063 int save_count = transport_count;
3065 DEBUG(D_deliver|D_transport)
3066 debug_printf(">>>>>>>>>>>>>>>> Shadow delivery >>>>>>>>>>>>>>>>\n");
3067 deliver_local(shadow_addr, TRUE);
3069 for(; shadow_addr; shadow_addr = shadow_addr->next)
3071 int sresult = shadow_addr->transport_return;
3072 *(uschar **)shadow_addr->shadow_message =
3074 ? string_sprintf(" ST=%s", stp->name)
3075 : string_sprintf(" ST=%s (%s%s%s)", stp->name,
3076 shadow_addr->basic_errno <= 0
3078 : US strerror(shadow_addr->basic_errno),
3079 shadow_addr->basic_errno <= 0 || !shadow_addr->message
3082 shadow_addr->message
3083 ? shadow_addr->message
3084 : shadow_addr->basic_errno <= 0
3088 DEBUG(D_deliver|D_transport)
3089 debug_printf("%s shadow transport returned %s for %s\n",
3090 stp->name, rc_to_string(sresult), shadow_addr->address);
3093 DEBUG(D_deliver|D_transport)
3094 debug_printf(">>>>>>>>>>>>>>>> End shadow delivery >>>>>>>>>>>>>>>>\n");
3096 transport_count = save_count; /* Restore original transport count */
3100 /* Cancel the expansions that were set up for the delivery. */
3102 deliver_set_expansions(NULL);
3104 /* If the transport was parallelism-limited, decrement the hints DB record. */
3106 if (serialize_key) enq_end(serialize_key);
3108 /* Now we can process the results of the real transport. We must take each
3109 address off the chain first, because post_process_one() puts it on another
3112 for (addr2 = addr; addr2; addr2 = nextaddr)
3114 int result = addr2->transport_return;
3115 nextaddr = addr2->next;
3117 DEBUG(D_deliver|D_transport)
3118 debug_printf("%s transport returned %s for %s\n",
3119 tp->name, rc_to_string(result), addr2->address);
3121 /* If there is a retry_record, or if delivery is deferred, build a retry
3122 item for setting a new retry time or deleting the old retry record from
3123 the database. These items are handled all together after all addresses
3124 have been handled (so the database is open just for a short time for
3127 if (result == DEFER || testflag(addr2, af_lt_retry_exists))
3129 int flags = result == DEFER ? 0 : rf_delete;
3130 uschar *retry_key = string_copy(tp->retry_use_local_part
3131 ? addr2->address_retry_key : addr2->domain_retry_key);
3133 retry_add_item(addr2, retry_key, flags);
3136 /* Done with this address */
3138 addr2->delivery_time = deliver_time;
3139 post_process_one(addr2, result, logflags, EXIM_DTYPE_TRANSPORT, logchar);
3141 /* If a pipe delivery generated text to be sent back, the result may be
3142 changed to FAIL, and we must copy this for subsequent addresses in the
3145 if (addr2->transport_return != result)
3147 for (addr3 = nextaddr; addr3; addr3 = addr3->next)
3149 addr3->transport_return = addr2->transport_return;
3150 addr3->basic_errno = addr2->basic_errno;
3151 addr3->message = addr2->message;
3153 result = addr2->transport_return;
3156 /* Whether or not the result was changed to FAIL, we need to copy the
3157 return_file value from the first address into all the addresses of the
3158 batch, so they are all listed in the error message. */
3160 addr2->return_file = addr->return_file;
3162 /* Change log character for recording successful deliveries. */
3164 if (result == OK) logchar = '-';
3166 } /* Loop back for next batch of addresses */
3172 /*************************************************
3173 * Sort remote deliveries *
3174 *************************************************/
3176 /* This function is called if remote_sort_domains is set. It arranges that the
3177 chain of addresses for remote deliveries is ordered according to the strings
3178 specified. Try to make this shuffling reasonably efficient by handling
3179 sequences of addresses rather than just single ones.
3186 sort_remote_deliveries(void)
3189 address_item **aptr = &addr_remote;
3190 const uschar *listptr = remote_sort_domains;
3194 /*XXX The list is used before expansion. Not sure how that ties up with the docs */
3196 && (pattern = string_nextinlist(&listptr, &sep, patbuf, sizeof(patbuf)))
3199 address_item *moved = NULL;
3200 address_item **bptr = &moved;
3204 address_item **next;
3205 deliver_domain = (*aptr)->domain; /* set $domain */
3206 if (match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1,
3207 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK)
3209 aptr = &(*aptr)->next;
3213 next = &(*aptr)->next;
3215 && (deliver_domain = (*next)->domain, /* Set $domain */
3216 match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1,
3217 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL)) != OK
3219 next = &(*next)->next;
3221 /* If the batch of non-matchers is at the end, add on any that were
3222 extracted further up the chain, and end this iteration. Otherwise,
3223 extract them from the chain and hang on the moved chain. */
3235 aptr = &(*aptr)->next;
3238 /* If the loop ended because the final address matched, *aptr will
3239 be NULL. Add on to the end any extracted non-matching addresses. If
3240 *aptr is not NULL, the loop ended via "break" when *next is null, that
3241 is, there was a string of non-matching addresses at the end. In this
3242 case the extracted addresses have already been added on the end. */
3244 if (!*aptr) *aptr = moved;
3249 debug_printf("remote addresses after sorting:\n");
3250 for (address_item * addr = addr_remote; addr; addr = addr->next)
3251 debug_printf(" %s\n", addr->address);
3257 /*************************************************
3258 * Read from pipe for remote delivery subprocess *
3259 *************************************************/
3261 /* This function is called when the subprocess is complete, but can also be
3262 called before it is complete, in order to empty a pipe that is full (to prevent
3263 deadlock). It must therefore keep track of its progress in the parlist data
3266 We read the pipe to get the delivery status codes and a possible error message
3267 for each address, optionally preceded by unusability data for the hosts and
3268 also by optional retry data.
3270 Read in large chunks into the big buffer and then scan through, interpreting
3271 the data therein. In most cases, only a single read will be necessary. No
3272 individual item will ever be anywhere near 2500 bytes in length, so by ensuring
3273 that we read the next chunk when there is less than 2500 bytes left in the
3274 non-final chunk, we can assume each item is complete in the buffer before
3275 handling it. Each item is written using a single write(), which is atomic for
3276 small items (less than PIPE_BUF, which seems to be at least 512 in any Unix and
3277 often bigger) so even if we are reading while the subprocess is still going, we
3278 should never have only a partial item in the buffer.
3280 hs12: This assumption is not true anymore, since we get quite large items (certificate
3281 information and such).
3284 poffset the offset of the parlist item
3285 eop TRUE if the process has completed
3287 Returns: TRUE if the terminating 'Z' item has been read,
3288 or there has been a disaster (i.e. no more data needed);
3293 par_read_pipe(int poffset, BOOL eop)
3296 pardata *p = parlist + poffset;
3297 address_item *addrlist = p->addrlist;
3298 address_item *addr = p->addr;
3302 uschar *msg = p->msg;
3303 BOOL done = p->done;
3305 /* Loop through all items, reading from the pipe when necessary. The pipe
3306 used to be non-blocking. But I do not see a reason for using non-blocking I/O
3307 here, as the preceding poll() tells us, if data is available for reading.
3309 A read() on a "selected" handle should never block, but(!) it may return
3310 less data then we expected. (The buffer size we pass to read() shouldn't be
3311 understood as a "request", but as a "limit".)
3313 Each separate item is written to the pipe in a timely manner. But, especially for
3314 larger items, the read(2) may already return partial data from the write(2).
3316 The write is atomic mostly (depending on the amount written), but atomic does
3317 not imply "all or noting", it just is "not intermixed" with other writes on the
3318 same channel (pipe).
3322 DEBUG(D_deliver) debug_printf("reading pipe for subprocess %d (%s)\n",
3323 (int)p->pid, eop? "ended" : "not ended yet");
3327 retry_item *r, **rp;
3328 uschar pipeheader[PIPE_HEADER_SIZE+1];
3329 uschar *id = &pipeheader[0];
3330 uschar *subid = &pipeheader[1];
3331 uschar *ptr = big_buffer;
3332 size_t required = PIPE_HEADER_SIZE; /* first the pipehaeder, later the data */
3335 DEBUG(D_deliver) debug_printf(
3336 "expect %lu bytes (pipeheader) from tpt process %d\n", (u_long)required, pid);
3338 /* We require(!) all the PIPE_HEADER_SIZE bytes here, as we know,
3339 they're written in a timely manner, so waiting for the write shouldn't hurt a lot.
3340 If we get less, we can assume the subprocess do be done and do not expect any further
3341 information from it. */
3343 if ((got = readn(fd, pipeheader, required)) != required)
3345 msg = string_sprintf("got " SSIZE_T_FMT " of %d bytes (pipeheader) "
3346 "from transport process %d for transport %s",
3347 got, PIPE_HEADER_SIZE, pid, addr->transport->driver_name);
3352 pipeheader[PIPE_HEADER_SIZE] = '\0';
3354 debug_printf("got %ld bytes (pipeheader) from transport process %d\n",
3358 /* If we can't decode the pipeheader, the subprocess seems to have a
3359 problem, we do not expect any furher information from it. */
3361 required = Ustrtol(pipeheader+2, &endc, 10);
3364 msg = string_sprintf("failed to read pipe "
3365 "from transport process %d for transport %s: error decoding size from header",
3366 pid, addr->transport->driver_name);
3373 debug_printf("expect %lu bytes (pipedata) from transport process %d\n",
3374 (u_long)required, pid);
3376 /* Same as above, the transport process will write the bytes announced
3377 in a timely manner, so we can just wait for the bytes, getting less than expected
3378 is considered a problem of the subprocess, we do not expect anything else from it. */
3379 if ((got = readn(fd, big_buffer, required)) != required)
3381 msg = string_sprintf("got only " SSIZE_T_FMT " of " SIZE_T_FMT
3382 " bytes (pipedata) from transport process %d for transport %s",
3383 got, required, pid, addr->transport->driver_name);
3388 /* Handle each possible type of item, assuming the complete item is
3389 available in store. */
3393 /* Host items exist only if any hosts were marked unusable. Match
3394 up by checking the IP address. */
3397 for (h = addrlist->host_list; h; h = h->next)
3399 if (!h->address || Ustrcmp(h->address, ptr+2) != 0) continue;
3407 /* Retry items are sent in a preceding R item for each address. This is
3408 kept separate to keep each message short enough to guarantee it won't
3409 be split in the pipe. Hopefully, in the majority of cases, there won't in
3410 fact be any retry items at all.
3412 The complete set of retry items might include an item to delete a
3413 routing retry if there was a previous routing delay. However, routing
3414 retries are also used when a remote transport identifies an address error.
3415 In that case, there may also be an "add" item for the same key. Arrange
3416 that a "delete" item is dropped in favour of an "add" item. */
3419 if (!addr) goto ADDR_MISMATCH;
3421 DEBUG(D_deliver|D_retry)
3422 debug_printf("reading retry information for %s from subprocess\n",
3425 /* Cut out any "delete" items on the list. */
3427 for (rp = &addr->retries; (r = *rp); rp = &r->next)
3428 if (Ustrcmp(r->key, ptr+1) == 0) /* Found item with same key */
3430 if (!(r->flags & rf_delete)) break; /* It was not "delete" */
3431 *rp = r->next; /* Excise a delete item */
3432 DEBUG(D_deliver|D_retry)
3433 debug_printf(" existing delete item dropped\n");
3436 /* We want to add a delete item only if there is no non-delete item;
3437 however we still have to step ptr through the data. */
3439 if (!r || !(*ptr & rf_delete))
3441 r = store_get(sizeof(retry_item), GET_UNTAINTED);
3442 r->next = addr->retries;
3445 r->key = string_copy(ptr);
3447 memcpy(&r->basic_errno, ptr, sizeof(r->basic_errno));
3448 ptr += sizeof(r->basic_errno);
3449 memcpy(&r->more_errno, ptr, sizeof(r->more_errno));
3450 ptr += sizeof(r->more_errno);
3451 r->message = *ptr ? string_copy(ptr) : NULL;
3452 DEBUG(D_deliver|D_retry) debug_printf(" added %s item\n",
3453 r->flags & rf_delete ? "delete" : "retry");
3458 DEBUG(D_deliver|D_retry)
3459 debug_printf(" delete item not added: non-delete item exists\n");
3462 ptr += sizeof(r->basic_errno) + sizeof(r->more_errno);
3468 /* Put the amount of data written into the parlist block */
3471 memcpy(&(p->transport_count), ptr, sizeof(transport_count));
3472 ptr += sizeof(transport_count);
3475 /* Address items are in the order of items on the address chain. We
3476 remember the current address value in case this function is called
3477 several times to empty the pipe in stages. Information about delivery
3478 over TLS is sent in a preceding X item for each address. We don't put
3479 it in with the other info, in order to keep each message short enough to
3480 guarantee it won't be split in the pipe. */
3483 case 'X': /* TLS details */
3484 if (!addr) goto ADDR_MISMATCH; /* Below, in 'A' handler */
3488 addr->tlsver = addr->cipher = addr->peerdn = NULL;
3492 addr->cipher = string_copy(ptr);
3493 addr->tlsver = string_copyn(ptr, Ustrchr(ptr, ':') - ptr);
3497 addr->peerdn = string_copy(ptr);
3502 (void) tls_import_cert(ptr, &addr->peercert);
3504 addr->peercert = NULL;
3509 (void) tls_import_cert(ptr, &addr->ourcert);
3511 addr->ourcert = NULL;
3514 # ifndef DISABLE_OCSP
3516 addr->ocsp = *ptr ? *ptr - '0' : OCSP_NOT_REQ;
3522 #endif /*DISABLE_TLS*/
3524 case 'C': /* client authenticator information */
3527 case '1': addr->authenticator = *ptr ? string_copy(ptr) : NULL; break;
3528 case '2': addr->auth_id = *ptr ? string_copy(ptr) : NULL; break;
3529 case '3': addr->auth_sndr = *ptr ? string_copy(ptr) : NULL; break;
3534 #ifndef DISABLE_PRDR
3536 setflag(addr, af_prdr_used);
3543 #ifndef DISABLE_PIPE_CONNECT
3544 case 2: setflag(addr, af_early_pipe); /*FALLTHROUGH*/
3546 case 1: setflag(addr, af_pipelining); break;
3551 setflag(addr, af_chunking_used);
3555 setflag(addr, af_tcp_fastopen_conn);
3556 if (*subid > '0') setflag(addr, af_tcp_fastopen);
3557 if (*subid > '1') setflag(addr, af_tcp_fastopen_data);
3561 if (!addr) goto ADDR_MISMATCH;
3562 memcpy(&(addr->dsn_aware), ptr, sizeof(addr->dsn_aware));
3563 ptr += sizeof(addr->dsn_aware);
3564 DEBUG(D_deliver) debug_printf("DSN read: addr->dsn_aware = %d\n", addr->dsn_aware);
3567 case 'A': /* Per-address info */
3571 msg = string_sprintf("address count mismatch for data read from pipe "
3572 "for transport process %d for transport %s", pid,
3573 addrlist->transport->driver_name);
3580 case 3: /* explicit notification of continued-connection (non)use;
3581 overrides caller's knowlege. */
3582 if (*ptr & BIT(1)) setflag(addr, af_new_conn);
3583 else if (*ptr & BIT(2)) setflag(addr, af_cont_conn);
3586 #ifdef SUPPORT_SOCKS
3587 case '2': /* proxy information; must arrive before A0 and applies to that addr XXX oops*/
3588 proxy_session = TRUE; /*XXX should this be cleared somewhere? */
3593 proxy_local_address = string_copy(ptr);
3595 memcpy(&proxy_local_port, ptr, sizeof(proxy_local_port));
3596 ptr += sizeof(proxy_local_port);
3601 #ifdef EXPERIMENTAL_DSN_INFO
3602 case '1': /* must arrive before A0, and applies to that addr */
3603 /* Two strings: smtp_greeting and helo_response */
3604 addr->smtp_greeting = string_copy(ptr);
3606 addr->helo_response = string_copy(ptr);
3611 case '0': /* results of trying to send to this address */
3612 DEBUG(D_deliver) debug_printf("A0 %s tret %d\n", addr->address, *ptr);
3613 addr->transport_return = *ptr++;
3614 addr->special_action = *ptr++;
3615 memcpy(&addr->basic_errno, ptr, sizeof(addr->basic_errno));
3616 ptr += sizeof(addr->basic_errno);
3617 memcpy(&addr->more_errno, ptr, sizeof(addr->more_errno));
3618 ptr += sizeof(addr->more_errno);
3619 memcpy(&addr->delivery_time, ptr, sizeof(addr->delivery_time));
3620 ptr += sizeof(addr->delivery_time);
3621 memcpy(&addr->flags, ptr, sizeof(addr->flags));
3622 ptr += sizeof(addr->flags);
3623 addr->message = *ptr ? string_copy(ptr) : NULL;
3625 addr->user_message = *ptr ? string_copy(ptr) : NULL;
3628 /* Always two strings for host information, followed by the port number and DNSSEC mark */
3632 h = store_get(sizeof(host_item), GET_UNTAINTED);
3633 h->name = string_copy(ptr);
3635 h->address = string_copy(ptr);
3637 memcpy(&h->port, ptr, sizeof(h->port));
3638 ptr += sizeof(h->port);
3639 h->dnssec = *ptr == '2' ? DS_YES
3640 : *ptr == '1' ? DS_NO
3643 addr->host_used = h;
3647 /* Finished with this address */
3654 /* Local interface address/port */
3656 if (*ptr) sending_ip_address = string_copy(ptr);
3658 if (*ptr) sending_port = atoi(CS ptr);
3662 /* Z marks the logical end of the data. It is followed by '0' if
3663 continue_transport was NULL at the end of transporting, otherwise '1'.
3664 We need to know when it becomes NULL during a delivery down a passed SMTP
3665 channel so that we don't try to pass anything more down it. Of course, for
3666 most normal messages it will remain NULL all the time. */
3671 continue_transport = NULL;
3672 continue_hostname = NULL;
3675 DEBUG(D_deliver) debug_printf("Z0%c item read\n", *ptr);
3678 /* Anything else is a disaster. */
3681 msg = string_sprintf("malformed data (%d) read from pipe for transport "
3682 "process %d for transport %s", ptr[-1], pid,
3683 addr->transport->driver_name);
3689 /* The done flag is inspected externally, to determine whether or not to
3690 call the function again when the process finishes. */
3694 /* If the process hadn't finished, and we haven't seen the end of the data
3695 or if we suffered a disaster, update the rest of the state, and return FALSE to
3696 indicate "not finished". */
3705 /* Close our end of the pipe, to prevent deadlock if the far end is still
3706 pushing stuff into it. */
3711 /* If we have finished without error, but haven't had data for every address,
3712 something is wrong. */
3715 msg = string_sprintf("insufficient address data read from pipe "
3716 "for transport process %d for transport %s", pid,
3717 addr->transport->driver_name);
3719 /* If an error message is set, something has gone wrong in getting back
3720 the delivery data. Put the message into each address and freeze it. */
3723 for (addr = addrlist; addr; addr = addr->next)
3725 addr->transport_return = DEFER;
3726 addr->special_action = SPECIAL_FREEZE;
3727 addr->message = msg;
3728 log_write(0, LOG_MAIN|LOG_PANIC, "Delivery status for %s: %s\n", addr->address, addr->message);
3731 /* Return TRUE to indicate we have got all we need from this process, even
3732 if it hasn't actually finished yet. */
3739 /*************************************************
3740 * Post-process a set of remote addresses *
3741 *************************************************/
3743 /* Do what has to be done immediately after a remote delivery for each set of
3744 addresses, then re-write the spool if necessary. Note that post_process_one
3745 puts the address on an appropriate queue; hence we must fish off the next
3746 one first. This function is also called if there is a problem with setting
3747 up a subprocess to do a remote delivery in parallel. In this case, the final
3748 argument contains a message, and the action must be forced to DEFER.
3751 addr pointer to chain of address items
3752 logflags flags for logging
3753 msg NULL for normal cases; -> error message for unexpected problems
3754 fallback TRUE if processing fallback hosts
3760 remote_post_process(address_item * addr, int logflags, uschar * msg,
3763 /* If any host addresses were found to be unusable, add them to the unusable
3764 tree so that subsequent deliveries don't try them. */
3766 for (host_item * h = addr->host_list; h; h = h->next)
3768 if (h->status >= hstatus_unusable) tree_add_unusable(h);
3770 /* Now handle each address on the chain. The transport has placed '=' or '-'
3771 into the special_action field for each successful delivery. */
3775 address_item * next = addr->next;
3777 /* If msg == NULL (normal processing) and the result is DEFER and we are
3778 processing the main hosts and there are fallback hosts available, put the
3779 address on the list for fallback delivery. */
3781 if ( addr->transport_return == DEFER
3782 && addr->fallback_hosts
3787 addr->host_list = addr->fallback_hosts;
3788 addr->next = addr_fallback;
3789 addr_fallback = addr;
3790 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", addr->address);
3793 /* If msg is set (=> unexpected problem), set it in the address before
3794 doing the ordinary post processing. */
3800 addr->message = msg;
3801 addr->transport_return = DEFER;
3803 (void)post_process_one(addr, addr->transport_return, logflags,
3804 EXIM_DTYPE_TRANSPORT, addr->special_action);
3812 /* If we have just delivered down a passed SMTP channel, and that was
3813 the last address, the channel will have been closed down. Now that
3814 we have logged that delivery, set continue_sequence to 1 so that
3815 any subsequent deliveries don't get "*" incorrectly logged. */
3817 if (!continue_transport) continue_sequence = 1;
3822 /*************************************************
3823 * Wait for one remote delivery subprocess *
3824 *************************************************/
3826 /* This function is called while doing remote deliveries when either the
3827 maximum number of processes exist and we need one to complete so that another
3828 can be created, or when waiting for the last ones to complete. It must wait for
3829 the completion of one subprocess, empty the control block slot, and return a
3830 pointer to the address chain.
3833 Returns: pointer to the chain of addresses handled by the process;
3834 NULL if no subprocess found - this is an unexpected error
3837 static address_item *
3840 int poffset, status;
3841 address_item * addr, * addrlist;
3844 set_process_info("delivering %s: waiting for a remote delivery subprocess "
3845 "to finish", message_id);
3847 /* Loop until either a subprocess completes, or there are no subprocesses in
3848 existence - in which case give an error return. We cannot proceed just by
3849 waiting for a completion, because a subprocess may have filled up its pipe, and
3850 be waiting for it to be emptied. Therefore, if no processes have finished, we
3851 wait for one of the pipes to acquire some data by calling poll(), with a
3852 timeout just in case.
3854 The simple approach is just to iterate after reading data from a ready pipe.
3855 This leads to non-ideal behaviour when the subprocess has written its final Z
3856 item, closed the pipe, and is in the process of exiting (the common case). A
3857 call to waitpid() yields nothing completed, but poll() shows the pipe ready -
3858 reading it yields EOF, so you end up with busy-waiting until the subprocess has
3861 To avoid this, if all the data that is needed has been read from a subprocess
3862 after poll(), an explicit wait() for it is done. We know that all it is doing
3863 is writing to the pipe and then exiting, so the wait should not be long.
3865 The non-blocking waitpid() is to some extent just insurance; if we could
3866 reliably detect end-of-file on the pipe, we could always know when to do a
3867 blocking wait() for a completed process. However, because some systems use
3868 NDELAY, which doesn't distinguish between EOF and pipe empty, it is easier to
3869 use code that functions without the need to recognize EOF.
3871 There's a double loop here just in case we end up with a process that is not in
3872 the list of remote delivery processes. Something has obviously gone wrong if
3873 this is the case. (For example, a process that is incorrectly left over from
3874 routing or local deliveries might be found.) The damage can be minimized by
3875 looping back and looking for another process. If there aren't any, the error
3876 return will happen. */
3878 for (;;) /* Normally we do not repeat this loop */
3880 while ((pid = waitpid(-1, &status, WNOHANG)) <= 0)
3884 /* A return value of -1 can mean several things. If errno != ECHILD, it
3885 either means invalid options (which we discount), or that this process was
3886 interrupted by a signal. Just loop to try the waitpid() again.
3888 If errno == ECHILD, waitpid() is telling us that there are no subprocesses
3889 in existence. This should never happen, and is an unexpected error.
3890 However, there is a nasty complication when running under Linux. If "strace
3891 -f" is being used under Linux to trace this process and its children,
3892 subprocesses are "stolen" from their parents and become the children of the
3893 tracing process. A general wait such as the one we've just obeyed returns
3894 as if there are no children while subprocesses are running. Once a
3895 subprocess completes, it is restored to the parent, and waitpid(-1) finds
3896 it. Thanks to Joachim Wieland for finding all this out and suggesting a
3899 This does not happen using "truss" on Solaris, nor (I think) with other
3900 tracing facilities on other OS. It seems to be specific to Linux.
3902 What we do to get round this is to use kill() to see if any of our
3903 subprocesses are still in existence. If kill() gives an OK return, we know
3904 it must be for one of our processes - it can't be for a re-use of the pid,
3905 because if our process had finished, waitpid() would have found it. If any
3906 of our subprocesses are in existence, we proceed to use poll() as if
3907 waitpid() had returned zero. I think this is safe. */
3911 if (errno != ECHILD) continue; /* Repeats the waitpid() */
3914 debug_printf("waitpid() returned -1/ECHILD: checking explicitly "
3915 "for process existence\n");
3917 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3919 if ((pid = parlist[poffset].pid) != 0 && kill(pid, 0) == 0)
3921 DEBUG(D_deliver) debug_printf("process %d still exists: assume "
3922 "stolen by strace\n", (int)pid);
3923 break; /* With poffset set */
3927 if (poffset >= remote_max_parallel)
3929 DEBUG(D_deliver) debug_printf("*** no delivery children found\n");
3930 return NULL; /* This is the error return */
3934 /* A pid value greater than 0 breaks the "while" loop. A negative value has
3935 been handled above. A return value of zero means that there is at least one
3936 subprocess, but there are no completed subprocesses. See if any pipes are
3937 ready with any data for reading. */
3939 DEBUG(D_deliver) debug_printf("polling subprocess pipes\n");
3941 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3942 if (parlist[poffset].pid != 0)
3944 parpoll[poffset].fd = parlist[poffset].fd;
3945 parpoll[poffset].events = POLLIN;
3948 parpoll[poffset].fd = -1;
3950 /* Stick in a 60-second timeout, just in case. */
3952 readycount = poll(parpoll, remote_max_parallel, 60 * 1000);
3954 /* Scan through the pipes and read any that are ready; use the count
3955 returned by poll() to stop when there are no more. Select() can return
3956 with no processes (e.g. if interrupted). This shouldn't matter.
3958 If par_read_pipe() returns TRUE, it means that either the terminating Z was
3959 read, or there was a disaster. In either case, we are finished with this
3960 process. Do an explicit wait() for the process and break the main loop if
3963 It turns out that we have to deal with the case of an interrupted system
3964 call, which can happen on some operating systems if the signal handling is
3965 set up to do that by default. */
3968 readycount > 0 && poffset < remote_max_parallel;
3971 if ( (pid = parlist[poffset].pid) != 0
3972 && parpoll[poffset].revents
3976 if (par_read_pipe(poffset, FALSE)) /* Finished with this pipe */
3977 for (;;) /* Loop for signals */
3979 pid_t endedpid = waitpid(pid, &status, 0);
3980 if (endedpid == pid) goto PROCESS_DONE;
3981 if (endedpid != (pid_t)(-1) || errno != EINTR)
3982 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Unexpected error return "
3983 "%d (errno = %d) from waitpid() for process %d",
3984 (int)endedpid, errno, (int)pid);
3989 /* Now go back and look for a completed subprocess again. */
3992 /* A completed process was detected by the non-blocking waitpid(). Find the
3993 data block that corresponds to this subprocess. */
3995 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3996 if (pid == parlist[poffset].pid) break;
3998 /* Found the data block; this is a known remote delivery process. We don't
3999 need to repeat the outer loop. This should be what normally happens. */
4001 if (poffset < remote_max_parallel) break;
4003 /* This situation is an error, but it's probably better to carry on looking
4004 for another process than to give up (as we used to do). */
4006 log_write(0, LOG_MAIN|LOG_PANIC, "Process %d finished: not found in remote "
4007 "transport process list", pid);
4008 } /* End of the "for" loop */
4010 /* Come here when all the data was completely read after a poll(), and
4011 the process in pid has been wait()ed for. */
4018 debug_printf("remote delivery process %d ended\n", (int)pid);
4020 debug_printf("remote delivery process %d ended: status=%04x\n", (int)pid,
4024 set_process_info("delivering %s", message_id);
4026 /* Get the chain of processed addresses */
4028 addrlist = parlist[poffset].addrlist;
4030 /* If the process did not finish cleanly, record an error and freeze (except
4031 for SIGTERM, SIGKILL and SIGQUIT), and also ensure the journal is not removed,
4032 in case the delivery did actually happen. */
4034 if ((status & 0xffff) != 0)
4037 int msb = (status >> 8) & 255;
4038 int lsb = status & 255;
4039 int code = (msb == 0)? (lsb & 0x7f) : msb;
4041 msg = string_sprintf("%s transport process returned non-zero status 0x%04x: "
4043 addrlist->transport->driver_name,
4045 msb == 0 ? "terminated by signal" : "exit code",
4048 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
4049 addrlist->special_action = SPECIAL_FREEZE;
4051 for (addr = addrlist; addr; addr = addr->next)
4053 addr->transport_return = DEFER;
4054 addr->message = msg;
4057 remove_journal = FALSE;
4060 /* Else complete reading the pipe to get the result of the delivery, if all
4061 the data has not yet been obtained. */
4063 else if (!parlist[poffset].done)
4064 (void) par_read_pipe(poffset, TRUE);
4066 /* Put the data count and return path into globals, mark the data slot unused,
4067 decrement the count of subprocesses, and return the address chain. */
4069 transport_count = parlist[poffset].transport_count;
4070 used_return_path = parlist[poffset].return_path;
4071 parlist[poffset].pid = 0;
4078 /*************************************************
4079 * Wait for subprocesses and post-process *
4080 *************************************************/
4082 /* This function waits for subprocesses until the number that are still running
4083 is below a given threshold. For each complete subprocess, the addresses are
4084 post-processed. If we can't find a running process, there is some shambles.
4085 Better not bomb out, as that might lead to multiple copies of the message. Just
4086 log and proceed as if all done.
4089 max maximum number of subprocesses to leave running
4090 fallback TRUE if processing fallback hosts
4096 par_reduce(int max, BOOL fallback)
4098 while (parcount > max)
4100 address_item * doneaddr = par_wait();
4103 log_write(0, LOG_MAIN|LOG_PANIC,
4104 "remote delivery process count got out of step");
4109 transport_instance * tp = doneaddr->transport;
4110 if (tp->max_parallel)
4111 enq_end(string_sprintf("tpt-serialize-%s", tp->name));
4113 remote_post_process(doneaddr, LOG_MAIN, NULL, fallback);
4119 rmt_dlv_checked_write(int fd, char id, char subid, void * buf, ssize_t size)
4121 uschar pipe_header[PIPE_HEADER_SIZE+1];
4122 size_t total_len = PIPE_HEADER_SIZE + size;
4124 struct iovec iov[2] = {
4125 { pipe_header, PIPE_HEADER_SIZE }, /* indication about the data to expect */
4126 { buf, size } /* *the* data */
4131 /* we assume that size can't get larger then BIG_BUFFER_SIZE which currently is set to 16k */
4132 /* complain to log if someone tries with buffer sizes we can't handle*/
4134 if (size > BIG_BUFFER_SIZE-1)
4136 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4137 "Failed writing transport result to pipe: can't handle buffers > %d bytes. truncating!\n",
4139 size = BIG_BUFFER_SIZE;
4142 /* Should we check that we do not write more than PIPE_BUF? What would
4145 /* convert size to human readable string prepended by id and subid */
4146 if (PIPE_HEADER_SIZE != snprintf(CS pipe_header, PIPE_HEADER_SIZE+1, "%c%c%05ld",
4147 id, subid, (long)size))
4148 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "header snprintf failed\n");
4150 DEBUG(D_deliver) debug_printf("header write id:%c,subid:%c,size:%ld,final:%s\n",
4151 id, subid, (long)size, pipe_header);
4153 if ((ret = writev(fd, iov, 2)) != total_len)
4154 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4155 "Failed writing transport result to pipe (%ld of %ld bytes): %s",
4156 (long)ret, (long)total_len, ret == -1 ? strerror(errno) : "short write");
4159 /*************************************************
4160 * Do remote deliveries *
4161 *************************************************/
4163 /* This function is called to process the addresses in addr_remote. We must
4164 pick off the queue all addresses that have the same transport, remote
4165 destination, and errors address, and hand them to the transport in one go,
4166 subject to some configured limitations. If this is a run to continue delivering
4167 to an existing delivery channel, skip all but those addresses that can go to
4168 that channel. The skipped addresses just get deferred.
4170 If mua_wrapper is set, all addresses must be able to be sent in a single
4171 transaction. If not, this function yields FALSE.
4173 In Exim 4, remote deliveries are always done in separate processes, even
4174 if remote_max_parallel = 1 or if there's only one delivery to do. The reason
4175 is so that the base process can retain privilege. This makes the
4176 implementation of fallback transports feasible (though not initially done.)
4178 We create up to the configured number of subprocesses, each of which passes
4179 back the delivery state via a pipe. (However, when sending down an existing
4180 connection, remote_max_parallel is forced to 1.)
4183 fallback TRUE if processing fallback hosts
4185 Returns: TRUE normally
4186 FALSE if mua_wrapper is set and the addresses cannot all be sent
4191 do_remote_deliveries(BOOL fallback)
4196 parcount = 0; /* Number of executing subprocesses */
4198 /* When sending down an existing channel, only do one delivery at a time.
4199 We use a local variable (parmax) to hold the maximum number of processes;
4200 this gets reduced from remote_max_parallel if we can't create enough pipes. */
4202 if (continue_transport) remote_max_parallel = 1;
4203 parmax = remote_max_parallel;
4205 /* If the data for keeping a list of processes hasn't yet been
4210 parlist = store_get(remote_max_parallel * sizeof(pardata), GET_UNTAINTED);
4211 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4212 parlist[poffset].pid = 0;
4213 parpoll = store_get(remote_max_parallel * sizeof(struct pollfd), GET_UNTAINTED);
4216 /* Now loop for each remote delivery */
4218 for (int delivery_count = 0; addr_remote; delivery_count++)
4224 int address_count = 1;
4225 int address_count_max;
4227 BOOL use_initgroups;
4228 BOOL pipe_done = FALSE;
4229 transport_instance *tp;
4230 address_item **anchor = &addr_remote;
4231 address_item *addr = addr_remote;
4232 address_item *last = addr;
4235 uschar * serialize_key = NULL;
4237 /* Pull the first address right off the list. */
4239 addr_remote = addr->next;
4242 DEBUG(D_deliver|D_transport)
4243 debug_printf("--------> %s <--------\n", addr->address);
4245 /* If no transport has been set, there has been a big screw-up somewhere. */
4247 if (!(tp = addr->transport))
4249 f.disable_logging = FALSE; /* Jic */
4250 panicmsg = US"No transport set by router";
4251 goto panic_continue;
4254 /* Check that this base address hasn't previously been delivered to this
4255 transport. The check is necessary at this point to handle homonymic addresses
4256 correctly in cases where the pattern of redirection changes between delivery
4257 attempts. Non-homonymic previous delivery is detected earlier, at routing
4260 if (previously_transported(addr, FALSE)) continue;
4262 /* Force failure if the message is too big. */
4264 if (tp->message_size_limit)
4266 int rc = check_message_size(tp, addr);
4269 addr->transport_return = rc;
4270 remote_post_process(addr, LOG_MAIN, NULL, fallback);
4275 /*XXX need to defeat this when DANE is used - but we don't know that yet.
4276 So look out for the place it gets used.
4279 /* Get the flag which specifies whether the transport can handle different
4280 domains that nevertheless resolve to the same set of hosts. If it needs
4281 expanding, get variables set: $address_data, $domain_data, $localpart_data,
4282 $host, $host_address, $host_port. */
4283 if (tp->expand_multi_domain)
4284 deliver_set_expansions(addr);
4286 if (exp_bool(addr, US"transport", tp->name, D_transport,
4287 US"multi_domain", tp->multi_domain, tp->expand_multi_domain,
4288 &multi_domain) != OK)
4290 deliver_set_expansions(NULL);
4291 panicmsg = addr->message;
4292 goto panic_continue;
4295 /* Get the maximum it can handle in one envelope, with zero meaning
4296 unlimited, which is forced for the MUA wrapper case and if the
4297 value could vary depending on the messages.
4298 For those, we only split (below) by (tpt,dest,erraddr,hdrs) and rely on the
4299 transport splitting further by max_rcp. So we potentially lose some
4302 address_count_max = mua_wrapper || Ustrchr(tp->max_addresses, '$')
4303 ? UNLIMITED_ADDRS : expand_max_rcpt(tp->max_addresses);
4306 /************************************************************************/
4307 /***** This is slightly experimental code, but should be safe. *****/
4309 /* The address_count_max value is the maximum number of addresses that the
4310 transport can send in one envelope. However, the transport must be capable of
4311 dealing with any number of addresses. If the number it gets exceeds its
4312 envelope limitation, it must send multiple copies of the message. This can be
4313 done over a single connection for SMTP, so uses less resources than making
4314 multiple connections. On the other hand, if remote_max_parallel is greater
4315 than one, it is perhaps a good idea to use parallel processing to move the
4316 message faster, even if that results in multiple simultaneous connections to
4319 How can we come to some compromise between these two ideals? What we do is to
4320 limit the number of addresses passed to a single instance of a transport to
4321 the greater of (a) its address limit (rcpt_max for SMTP) and (b) the total
4322 number of addresses routed to remote transports divided by
4323 remote_max_parallel. For example, if the message has 100 remote recipients,
4324 remote max parallel is 2, and rcpt_max is 10, we'd never send more than 50 at
4325 once. But if rcpt_max is 100, we could send up to 100.
4327 Of course, not all the remotely addresses in a message are going to go to the
4328 same set of hosts (except in smarthost configurations), so this is just a
4329 heuristic way of dividing up the work.
4331 Furthermore (1), because this may not be wanted in some cases, and also to
4332 cope with really pathological cases, there is also a limit to the number of
4333 messages that are sent over one connection. This is the same limit that is
4334 used when sending several different messages over the same connection.
4335 Continue_sequence is set when in this situation, to the number sent so
4336 far, including this message.
4338 Furthermore (2), when somebody explicitly sets the maximum value to 1, it
4339 is probably because they are using VERP, in which case they want to pass only
4340 one address at a time to the transport, in order to be able to use
4341 $local_part and $domain in constructing a new return path. We could test for
4342 the use of these variables, but as it is so likely they will be used when the
4343 maximum is 1, we don't bother. Just leave the value alone. */
4345 if ( address_count_max != 1
4346 && address_count_max < remote_delivery_count/remote_max_parallel
4349 int new_max = remote_delivery_count/remote_max_parallel;
4350 int message_max = tp->connection_max_messages;
4351 if (connection_max_messages >= 0) message_max = connection_max_messages;
4352 message_max -= continue_sequence - 1;
4353 if (message_max > 0 && new_max > address_count_max * message_max)
4354 new_max = address_count_max * message_max;
4355 address_count_max = new_max;
4358 /************************************************************************/
4361 /*XXX don't know yet if DANE will be used. So tpt will have to
4362 check at the point if gets next addr from list, and skip/defer any
4366 /* Pick off all addresses which have the same transport, errors address,
4367 destination, and extra headers. In some cases they point to the same host
4368 list, but we also need to check for identical host lists generated from
4369 entirely different domains. The host list pointers can be NULL in the case
4370 where the hosts are defined in the transport. There is also a configured
4371 maximum limit of addresses that can be handled at once (see comments above
4372 for how it is computed).
4373 If the transport does not handle multiple domains, enforce that also,
4374 and if it might need a per-address check for this, re-evaluate it.
4377 while ((next = *anchor) && address_count < address_count_max)
4380 if ( (multi_domain || Ustrcmp(next->domain, addr->domain) == 0)
4381 && tp == next->transport
4382 && same_hosts(next->host_list, addr->host_list)
4383 && same_strings(next->prop.errors_address, addr->prop.errors_address)
4384 && same_headers(next->prop.extra_headers, addr->prop.extra_headers)
4385 && same_ugid(tp, next, addr)
4386 && ( next->prop.remove_headers == addr->prop.remove_headers
4387 || ( next->prop.remove_headers
4388 && addr->prop.remove_headers
4389 && Ustrcmp(next->prop.remove_headers, addr->prop.remove_headers) == 0
4393 (void)(!tp->expand_multi_domain || ((void)deliver_set_expansions(next), 1)),
4395 US"transport", next->transport->name, D_transport,
4396 US"multi_domain", next->transport->multi_domain,
4397 next->transport->expand_multi_domain, &md) == OK
4402 *anchor = next->next;
4404 next->first = addr; /* remember top one (for retry processing) */
4409 else anchor = &(next->next);
4410 deliver_set_expansions(NULL);
4413 /* If we are acting as an MUA wrapper, all addresses must go in a single
4414 transaction. If not, put them back on the chain and yield FALSE. */
4416 if (mua_wrapper && addr_remote)
4418 last->next = addr_remote;
4423 /* If the transport is limited for parallellism, enforce that here.
4424 The hints DB entry is decremented in par_reduce(), when we reap the
4425 transport process. */
4427 if (tpt_parallel_check(tp, addr, &serialize_key))
4428 if ((panicmsg = expand_string_message))
4429 goto panic_continue;
4431 continue; /* Loop for the next set of addresses. */
4433 /* Set up the expansion variables for this set of addresses */
4435 deliver_set_expansions(addr);
4437 /* Ensure any transport-set auth info is fresh */
4438 addr->authenticator = addr->auth_id = addr->auth_sndr = NULL;
4440 /* Compute the return path, expanding a new one if required. The old one
4441 must be set first, as it might be referred to in the expansion. */
4443 if(addr->prop.errors_address)
4444 return_path = addr->prop.errors_address;
4446 return_path = sender_address;
4448 if (tp->return_path)
4450 uschar *new_return_path = expand_string(tp->return_path);
4451 if (new_return_path)
4452 return_path = new_return_path;
4453 else if (!f.expand_string_forcedfail)
4455 panicmsg = string_sprintf("Failed to expand return path \"%s\": %s",
4456 tp->return_path, expand_string_message);
4461 /* Find the uid, gid, and use_initgroups setting for this transport. Failure
4462 logs and sets up error messages, so we just post-process and continue with
4463 the next address. */
4465 if (!findugid(addr, tp, &uid, &gid, &use_initgroups))
4471 /* If this transport has a setup function, call it now so that it gets
4472 run in this process and not in any subprocess. That way, the results of
4473 any setup that are retained by the transport can be reusable. One of the
4474 things the setup does is to set the fallback host lists in the addresses.
4475 That is why it is called at this point, before the continue delivery
4476 processing, because that might use the fallback hosts. */
4479 (void)((tp->setup)(addr->transport, addr, NULL, uid, gid, NULL));
4481 /* If we have a connection still open from a verify stage (lazy-close)
4482 treat it as if it is a continued connection (apart from the counter used
4483 for the log line mark). */
4485 if (cutthrough.cctx.sock >= 0 && cutthrough.callout_hold_only)
4488 debug_printf("lazy-callout-close: have conn still open from verification\n");
4489 continue_transport = cutthrough.transport;
4490 continue_hostname = string_copy(cutthrough.host.name);
4491 continue_host_address = string_copy(cutthrough.host.address);
4492 continue_sequence = 1;
4493 sending_ip_address = cutthrough.snd_ip;
4494 sending_port = cutthrough.snd_port;
4495 smtp_peer_options = cutthrough.peer_options;
4498 /* If this is a run to continue delivery down an already-established
4499 channel, check that this set of addresses matches the transport and
4500 the channel. If it does not, defer the addresses. If a host list exists,
4501 we must check that the continue host is on the list. Otherwise, the
4502 host is set in the transport. */
4504 f.continue_more = FALSE; /* In case got set for the last lot */
4505 if (continue_transport)
4507 BOOL ok = Ustrcmp(continue_transport, tp->name) == 0;
4508 /*XXX do we need to check for a DANEd conn vs. a change of domain? */
4510 /* If the transport is about to override the host list do not check
4511 it here but take the cost of running the transport process to discover
4512 if the continued_hostname connection is suitable. This is a layering
4513 violation which is unfortunate as it requires we haul in the smtp
4518 smtp_transport_options_block * ob;
4520 if ( !( Ustrcmp(tp->info->driver_name, "smtp") == 0
4521 && (ob = (smtp_transport_options_block *)tp->options_block)
4522 && ob->hosts_override && ob->hosts
4528 for (host_item * h = addr->host_list; h; h = h->next)
4529 if (Ustrcmp(h->name, continue_hostname) == 0)
4530 /*XXX should also check port here */
4531 { ok = TRUE; break; }
4535 /* Addresses not suitable; defer or queue for fallback hosts (which
4536 might be the continue host) and skip to next address. */
4540 DEBUG(D_deliver) debug_printf("not suitable for continue_transport (%s)\n",
4541 Ustrcmp(continue_transport, tp->name) != 0
4542 ? string_sprintf("tpt %s vs %s", continue_transport, tp->name)
4543 : string_sprintf("no host matching %s", continue_hostname));
4544 if (serialize_key) enq_end(serialize_key);
4546 if (addr->fallback_hosts && !fallback)
4548 for (next = addr; ; next = next->next)
4550 next->host_list = next->fallback_hosts;
4551 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", next->address);
4552 if (!next->next) break;
4554 next->next = addr_fallback;
4555 addr_fallback = addr;
4560 for (next = addr; ; next = next->next)
4562 DEBUG(D_deliver) debug_printf(" %s to def list\n", next->address);
4563 if (!next->next) break;
4565 next->next = addr_defer;
4572 /* Set a flag indicating whether there are further addresses that list
4573 the continued host. This tells the transport to leave the channel open,
4574 but not to pass it to another delivery process. We'd like to do that
4575 for non-continue_transport cases too but the knowlege of which host is
4576 connected to is too hard to manage. Perhaps we need a finer-grain
4577 interface to the transport. */
4579 for (next = addr_remote; next && !f.continue_more; next = next->next)
4580 for (host_item * h = next->host_list; h; h = h->next)
4581 if (Ustrcmp(h->name, continue_hostname) == 0)
4582 { f.continue_more = TRUE; break; }
4585 /* The transports set up the process info themselves as they may connect
4586 to more than one remote machine. They also have to set up the filter
4587 arguments, if required, so that the host name and address are available
4590 transport_filter_argv = NULL;
4592 /* Create the pipe for inter-process communication. If pipe creation
4593 fails, it is probably because the value of remote_max_parallel is so
4594 large that too many file descriptors for pipes have been created. Arrange
4595 to wait for a process to finish, and then try again. If we still can't
4596 create a pipe when all processes have finished, break the retry loop. */
4600 if (pipe(pfd) == 0) pipe_done = TRUE;
4601 else if (parcount > 0) parmax = parcount;
4604 /* We need to make the reading end of the pipe non-blocking. There are
4605 two different options for this. Exim is cunningly (I hope!) coded so
4606 that it can use either of them, though it prefers O_NONBLOCK, which
4607 distinguishes between EOF and no-more-data. */
4609 /* The data appears in a timely manner and we already did a poll on
4610 all pipes, so I do not see a reason to use non-blocking IO here
4613 (void)fcntl(pfd[pipe_read], F_SETFL, O_NONBLOCK);
4615 (void)fcntl(pfd[pipe_read], F_SETFL, O_NDELAY);
4619 /* If the maximum number of subprocesses already exist, wait for a process
4620 to finish. If we ran out of file descriptors, parmax will have been reduced
4621 from its initial value of remote_max_parallel. */
4623 par_reduce(parmax - 1, fallback);
4626 /* If we failed to create a pipe and there were no processes to wait
4627 for, we have to give up on this one. Do this outside the above loop
4628 so that we can continue the main loop. */
4632 panicmsg = string_sprintf("unable to create pipe: %s", strerror(errno));
4636 /* Find a free slot in the pardata list. Must do this after the possible
4637 waiting for processes to finish, because a terminating process will free
4640 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4641 if (parlist[poffset].pid == 0)
4644 /* If there isn't one, there has been a horrible disaster. */
4646 if (poffset >= remote_max_parallel)
4648 (void)close(pfd[pipe_write]);
4649 (void)close(pfd[pipe_read]);
4650 panicmsg = US"Unexpectedly no free subprocess slot";
4654 /* Now fork a subprocess to do the remote delivery, but before doing so,
4655 ensure that any cached resources are released so as not to interfere with
4656 what happens in the subprocess. */
4660 if ((pid = exim_fork(US"transport")) == 0)
4662 int fd = pfd[pipe_write];
4665 /* Setting these globals in the subprocess means we need never clear them */
4666 transport_name = addr->transport->name;
4667 driver_srcfile = tp->srcfile;
4668 driver_srcline = tp->srcline;
4670 /* There are weird circumstances in which logging is disabled */
4671 f.disable_logging = tp->disable_logging;
4673 /* Show pids on debug output if parallelism possible */
4675 if (parmax > 1 && (parcount > 0 || addr_remote))
4676 DEBUG(D_any|D_v) debug_selector |= D_pid;
4678 /* Reset the random number generator, so different processes don't all
4679 have the same sequence. In the test harness we want different, but
4680 predictable settings for each delivery process, so do something explicit
4681 here rather they rely on the fixed reset in the random number function. */
4683 random_seed = f.running_in_test_harness ? 42 + 2*delivery_count : 0;
4685 /* Set close-on-exec on the pipe so that it doesn't get passed on to
4686 a new process that may be forked to do another delivery down the same
4689 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
4691 /* Close open file descriptors for the pipes of other processes
4692 that are running in parallel. */
4694 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4695 if (parlist[poffset].pid != 0) (void)close(parlist[poffset].fd);
4697 /* This process has inherited a copy of the file descriptor
4698 for the data file, but its file pointer is shared with all the
4699 other processes running in parallel. Therefore, we have to re-open
4700 the file in order to get a new file descriptor with its own
4701 file pointer. We don't need to lock it, as the lock is held by
4702 the parent process. There doesn't seem to be any way of doing
4703 a dup-with-new-file-pointer. */
4705 (void)close(deliver_datafile);
4707 uschar * fname = spool_fname(US"input", message_subdir, message_id, US"-D");
4709 if ( (deliver_datafile = Uopen(fname, EXIM_CLOEXEC | O_RDWR | O_APPEND, 0))
4711 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to reopen %s for remote "
4712 "parallel delivery: %s", fname, strerror(errno));
4715 #ifndef O_CLOEXEC /* Set the close-on-exec flag */
4716 (void)fcntl(deliver_datafile, F_SETFD, fcntl(deliver_datafile, F_GETFD) |
4720 /* Set the uid/gid of this process; bombs out on failure. */
4722 exim_setugid(uid, gid, use_initgroups,
4723 string_sprintf("remote delivery to %s with transport=%s",
4724 addr->address, tp->name));
4726 /* Close the unwanted half of this process' pipe, set the process state,
4727 and run the transport. Afterwards, transport_count will contain the number
4728 of bytes written. */
4730 (void)close(pfd[pipe_read]);
4731 set_process_info("delivering %s using %s", message_id, tp->name);
4732 debug_print_string(tp->debug_string);
4733 if (!(tp->info->code)(addr->transport, addr)) replicate_status(addr);
4735 set_process_info("delivering %s (just run %s for %s%s in subprocess)",
4736 message_id, tp->name, addr->address, addr->next ? ", ..." : "");
4738 /* Ensure any cached resources that we used are now released */
4742 /* Pass the result back down the pipe. This is a lot more information
4743 than is needed for a local delivery. We have to send back the error
4744 status for each address, the usability status for each host that is
4745 flagged as unusable, and all the retry items. When TLS is in use, we
4746 send also the cipher and peerdn information. Each type of information
4747 is flagged by an identifying byte, and is then in a fixed format (with
4748 strings terminated by zeros), and there is a final terminator at the
4749 end. The host information and retry information is all attached to
4750 the first address, so that gets sent at the start. */
4752 /* Host unusability information: for most success cases this will
4755 for (h = addr->host_list; h; h = h->next)
4757 if (!h->address || h->status < hstatus_unusable) continue;
4758 sprintf(CS big_buffer, "%c%c%s", h->status, h->why, h->address);
4759 rmt_dlv_checked_write(fd, 'H', '0', big_buffer, Ustrlen(big_buffer+2) + 3);
4762 /* The number of bytes written. This is the same for each address. Even
4763 if we sent several copies of the message down the same connection, the
4764 size of each one is the same, and it's that value we have got because
4765 transport_count gets reset before calling transport_write_message(). */
4767 memcpy(big_buffer, &transport_count, sizeof(transport_count));
4768 rmt_dlv_checked_write(fd, 'S', '0', big_buffer, sizeof(transport_count));
4770 /* Information about what happened to each address. Four item types are
4771 used: an optional 'X' item first, for TLS information, then an optional "C"
4772 item for any client-auth info followed by 'R' items for any retry settings,
4773 and finally an 'A' item for the remaining data. */
4775 for(; addr; addr = addr->next)
4779 /* The certificate verification status goes into the flags */
4780 if (tls_out.certificate_verified) setflag(addr, af_cert_verified);
4782 if (tls_out.dane_verified) setflag(addr, af_dane_verified);
4784 # ifndef DISABLE_TLS_RESUME
4785 if (tls_out.resumption & RESUME_USED) setflag(addr, af_tls_resume);
4788 /* Use an X item only if there's something to send */
4792 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", addr->cipher) + 1;
4796 ptr += sprintf(CS ptr, "%.512s", addr->peerdn) + 1;
4798 rmt_dlv_checked_write(fd, 'X', '1', big_buffer, ptr - big_buffer);
4800 else if (continue_proxy_cipher)
4802 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", continue_proxy_cipher) + 1;
4804 rmt_dlv_checked_write(fd, 'X', '1', big_buffer, ptr - big_buffer);
4810 if (tls_export_cert(ptr, big_buffer_size-2, addr->peercert))
4814 rmt_dlv_checked_write(fd, 'X', '2', big_buffer, ptr - big_buffer);
4819 if (tls_export_cert(ptr, big_buffer_size-2, addr->ourcert))
4823 rmt_dlv_checked_write(fd, 'X', '3', big_buffer, ptr - big_buffer);
4825 # ifndef DISABLE_OCSP
4826 if (addr->ocsp > OCSP_NOT_REQ)
4828 ptr = big_buffer + sprintf(CS big_buffer, "%c", addr->ocsp + '0') + 1;
4829 rmt_dlv_checked_write(fd, 'X', '4', big_buffer, ptr - big_buffer);
4832 #endif /*DISABLE_TLS*/
4834 if (client_authenticator)
4836 ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticator) + 1;
4837 rmt_dlv_checked_write(fd, 'C', '1', big_buffer, ptr - big_buffer);
4839 if (client_authenticated_id)
4841 ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticated_id) + 1;
4842 rmt_dlv_checked_write(fd, 'C', '2', big_buffer, ptr - big_buffer);
4844 if (client_authenticated_sender)
4846 ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticated_sender) + 1;
4847 rmt_dlv_checked_write(fd, 'C', '3', big_buffer, ptr - big_buffer);
4850 #ifndef DISABLE_PRDR
4851 if (testflag(addr, af_prdr_used))
4852 rmt_dlv_checked_write(fd, 'P', '0', NULL, 0);
4855 if (testflag(addr, af_pipelining))
4856 #ifndef DISABLE_PIPE_CONNECT
4857 if (testflag(addr, af_early_pipe))
4858 rmt_dlv_checked_write(fd, 'L', '2', NULL, 0);
4861 rmt_dlv_checked_write(fd, 'L', '1', NULL, 0);
4863 if (testflag(addr, af_chunking_used))
4864 rmt_dlv_checked_write(fd, 'K', '0', NULL, 0);
4866 if (testflag(addr, af_tcp_fastopen_conn))
4867 rmt_dlv_checked_write(fd, 'T',
4868 testflag(addr, af_tcp_fastopen) ? testflag(addr, af_tcp_fastopen_data)
4872 memcpy(big_buffer, &addr->dsn_aware, sizeof(addr->dsn_aware));
4873 rmt_dlv_checked_write(fd, 'D', '0', big_buffer, sizeof(addr->dsn_aware));
4875 /* Retry information: for most success cases this will be null. */
4877 for (retry_item * r = addr->retries; r; r = r->next)
4879 sprintf(CS big_buffer, "%c%.500s", r->flags, r->key);
4880 ptr = big_buffer + Ustrlen(big_buffer+2) + 3;
4881 memcpy(ptr, &r->basic_errno, sizeof(r->basic_errno));
4882 ptr += sizeof(r->basic_errno);
4883 memcpy(ptr, &r->more_errno, sizeof(r->more_errno));
4884 ptr += sizeof(r->more_errno);
4885 if (!r->message) *ptr++ = 0; else
4887 sprintf(CS ptr, "%.512s", r->message);
4890 rmt_dlv_checked_write(fd, 'R', '0', big_buffer, ptr - big_buffer);
4893 if (testflag(addr, af_new_conn) || testflag(addr, af_cont_conn))
4895 DEBUG(D_deliver) debug_printf("%scontinued-connection\n",
4896 testflag(addr, af_new_conn) ? "non-" : "");
4897 big_buffer[0] = testflag(addr, af_new_conn) ? BIT(1) : BIT(2);
4898 rmt_dlv_checked_write(fd, 'A', '3', big_buffer, 1);
4901 #ifdef SUPPORT_SOCKS
4902 if (LOGGING(proxy) && proxy_session)
4905 if (proxy_local_address)
4907 DEBUG(D_deliver) debug_printf("proxy_local_address '%s'\n", proxy_local_address);
4908 ptr = big_buffer + sprintf(CS ptr, "%.128s", proxy_local_address) + 1;
4909 DEBUG(D_deliver) debug_printf("proxy_local_port %d\n", proxy_local_port);
4910 memcpy(ptr, &proxy_local_port, sizeof(proxy_local_port));
4911 ptr += sizeof(proxy_local_port);
4915 rmt_dlv_checked_write(fd, 'A', '2', big_buffer, ptr - big_buffer);
4919 #ifdef EXPERIMENTAL_DSN_INFO
4920 /*um, are they really per-addr? Other per-conn stuff is not (auth, tls). But host_used is! */
4921 if (addr->smtp_greeting)
4923 DEBUG(D_deliver) debug_printf("smtp_greeting '%s'\n", addr->smtp_greeting);
4924 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", addr->smtp_greeting) + 1;
4925 if (addr->helo_response)
4927 DEBUG(D_deliver) debug_printf("helo_response '%s'\n", addr->helo_response);
4928 ptr += sprintf(CS ptr, "%.128s", addr->helo_response) + 1;
4932 rmt_dlv_checked_write(fd, 'A', '1', big_buffer, ptr - big_buffer);
4936 /* The rest of the information goes in an 'A0' item. */
4938 sprintf(CS big_buffer, "%c%c", addr->transport_return, addr->special_action);
4939 ptr = big_buffer + 2;
4940 memcpy(ptr, &addr->basic_errno, sizeof(addr->basic_errno));
4941 ptr += sizeof(addr->basic_errno);
4942 memcpy(ptr, &addr->more_errno, sizeof(addr->more_errno));
4943 ptr += sizeof(addr->more_errno);
4944 memcpy(ptr, &addr->delivery_time, sizeof(addr->delivery_time));
4945 ptr += sizeof(addr->delivery_time);
4946 memcpy(ptr, &addr->flags, sizeof(addr->flags));
4947 ptr += sizeof(addr->flags);
4949 if (!addr->message) *ptr++ = 0; else
4950 ptr += sprintf(CS ptr, "%.1024s", addr->message) + 1;
4952 if (!addr->user_message) *ptr++ = 0; else
4953 ptr += sprintf(CS ptr, "%.1024s", addr->user_message) + 1;
4955 if (!addr->host_used) *ptr++ = 0; else
4957 ptr += sprintf(CS ptr, "%.256s", addr->host_used->name) + 1;
4958 ptr += sprintf(CS ptr, "%.64s", addr->host_used->address) + 1;
4959 memcpy(ptr, &addr->host_used->port, sizeof(addr->host_used->port));
4960 ptr += sizeof(addr->host_used->port);
4962 /* DNS lookup status */
4963 *ptr++ = addr->host_used->dnssec==DS_YES ? '2'
4964 : addr->host_used->dnssec==DS_NO ? '1' : '0';
4967 rmt_dlv_checked_write(fd, 'A', '0', big_buffer, ptr - big_buffer);
4970 /* Local interface address/port */
4971 #ifdef EXPERIMENTAL_DSN_INFO
4972 if (sending_ip_address)
4974 if (LOGGING(incoming_interface) && sending_ip_address)
4978 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", sending_ip_address) + 1;
4979 ptr += sprintf(CS ptr, "%d", sending_port) + 1;
4980 rmt_dlv_checked_write(fd, 'I', '0', big_buffer, ptr - big_buffer);
4983 /* Add termination flag, close the pipe, and that's it. The character
4984 after 'Z' indicates whether continue_transport is now NULL or not.
4985 A change from non-NULL to NULL indicates a problem with a continuing
4988 big_buffer[0] = continue_transport ? '1' : '0';
4989 rmt_dlv_checked_write(fd, 'Z', '0', big_buffer, 1);
4994 /* Back in the mainline: close the unwanted half of the pipe. */
4996 (void)close(pfd[pipe_write]);
4998 /* If we have a connection still open from a verify stage (lazy-close)
4999 release its TLS library context (if any) as responsibility was passed to
5000 the delivery child process. */
5002 if (cutthrough.cctx.sock >= 0 && cutthrough.callout_hold_only)
5005 if (cutthrough.is_tls)
5006 tls_close(cutthrough.cctx.tls_ctx, TLS_NO_SHUTDOWN);
5008 (void) close(cutthrough.cctx.sock);
5009 release_cutthrough_connection(US"passed to transport proc");
5012 /* Fork failed; defer with error message */
5016 (void)close(pfd[pipe_read]);
5017 panicmsg = string_sprintf("fork failed for remote delivery to %s: %s",
5018 addr->domain, strerror(errno));
5022 /* Fork succeeded; increment the count, and remember relevant data for
5023 when the process finishes. */
5026 parlist[poffset].addrlist = parlist[poffset].addr = addr;
5027 parlist[poffset].pid = pid;
5028 parlist[poffset].fd = pfd[pipe_read];
5029 parlist[poffset].done = FALSE;
5030 parlist[poffset].msg = NULL;
5031 parlist[poffset].return_path = return_path;
5033 /* If the process we've just started is sending a message down an existing
5034 channel, wait for it now. This ensures that only one such process runs at
5035 once, whatever the value of remote_max parallel. Otherwise, we might try to
5036 send two or more messages simultaneously down the same channel. This could
5037 happen if there are different domains that include the same host in otherwise
5038 different host lists.
5040 Also, if the transport closes down the channel, this information gets back
5041 (continue_transport gets set to NULL) before we consider any other addresses
5044 if (continue_transport) par_reduce(0, fallback);
5046 /* Otherwise, if we are running in the test harness, wait a bit, to let the
5047 newly created process get going before we create another process. This should
5048 ensure repeatability in the tests. Wait long enough for most cases to complete
5051 else testharness_pause_ms(600);
5056 if (serialize_key) enq_end(serialize_key);
5058 remote_post_process(addr, LOG_MAIN|LOG_PANIC, panicmsg, fallback);
5062 /* Reached the end of the list of addresses. Wait for all the subprocesses that
5063 are still running and post-process their addresses. */
5065 par_reduce(0, fallback);
5072 /*************************************************
5073 * Split an address into local part and domain *
5074 *************************************************/
5076 /* This function initializes an address for routing by splitting it up into a
5077 local part and a domain. The local part is set up twice - once in its original
5078 casing, and once in lower case, and it is dequoted. We also do the "percent
5079 hack" for configured domains. This may lead to a DEFER result if a lookup
5080 defers. When a percent-hacking takes place, we insert a copy of the original
5081 address as a new parent of this address, as if we have had a redirection.
5084 addr points to an addr_item block containing the address
5087 DEFER - could not determine if domain is %-hackable
5091 deliver_split_address(address_item * addr)
5093 uschar * address = addr->address;
5098 if (!(domain = Ustrrchr(address, '@')))
5099 return DEFER; /* should always have a domain, but just in case... */
5101 len = domain - address;
5102 addr->domain = string_copylc(domain+1); /* Domains are always caseless */
5104 /* The implication in the RFCs (though I can't say I've seen it spelled out
5105 explicitly) is that quoting should be removed from local parts at the point
5106 where they are locally interpreted. [The new draft "821" is more explicit on
5107 this, Jan 1999.] We know the syntax is valid, so this can be done by simply
5108 removing quoting backslashes and any unquoted doublequotes. */
5110 t = addr->cc_local_part = store_get(len+1, address);
5114 if (c == '\"') continue;
5124 /* We do the percent hack only for those domains that are listed in
5125 percent_hack_domains. A loop is required, to copy with multiple %-hacks. */
5127 if (percent_hack_domains)
5130 uschar *new_address = NULL;
5131 uschar *local_part = addr->cc_local_part;
5133 deliver_domain = addr->domain; /* set $domain */
5135 while ( (rc = match_isinlist(deliver_domain, (const uschar **)&percent_hack_domains, 0,
5136 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
5138 && (t = Ustrrchr(local_part, '%')) != NULL
5141 new_address = string_copy(local_part);
5142 new_address[t - local_part] = '@';
5143 deliver_domain = string_copylc(t+1);
5144 local_part = string_copyn(local_part, t - local_part);
5147 if (rc == DEFER) return DEFER; /* lookup deferred */
5149 /* If hackery happened, set up new parent and alter the current address. */
5153 address_item * new_parent = store_get(sizeof(address_item), GET_UNTAINTED);
5154 *new_parent = *addr;
5155 addr->parent = new_parent;
5156 new_parent->child_count = 1;
5157 addr->address = new_address;
5158 addr->unique = string_copy(new_address);
5159 addr->domain = deliver_domain;
5160 addr->cc_local_part = local_part;
5161 DEBUG(D_deliver) debug_printf("%%-hack changed address to: %s\n",
5166 /* Create the lowercased version of the final local part, and make that the
5167 default one to be used. */
5169 addr->local_part = addr->lc_local_part = string_copylc(addr->cc_local_part);
5176 /*************************************************
5177 * Get next error message text *
5178 *************************************************/
5180 /* If f is not NULL, read the next "paragraph", from a customized error message
5181 text file, terminated by a line containing ****, and expand it.
5184 f NULL or a file to read from
5185 which string indicating which string (for errors)
5187 Returns: NULL or an expanded string
5191 next_emf(FILE *f, uschar *which)
5197 if (!f) return NULL;
5199 if (!Ufgets(buffer, sizeof(buffer), f) || Ustrcmp(buffer, "****\n") == 0)
5202 para = string_get(256);
5205 para = string_cat(para, buffer);
5206 if (!Ufgets(buffer, sizeof(buffer), f) || Ustrcmp(buffer, "****\n") == 0)
5209 if ((yield = expand_string(string_from_gstring(para))))
5212 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand string from "
5213 "bounce_message_file or warn_message_file (%s): %s", which,
5214 expand_string_message);
5221 /*************************************************
5222 * Close down a passed transport channel *
5223 *************************************************/
5225 /* This function is called when a passed transport channel cannot be used.
5226 It attempts to close it down tidily. The yield is always DELIVER_NOT_ATTEMPTED
5227 so that the function call can be the argument of a "return" statement.
5230 Returns: DELIVER_NOT_ATTEMPTED
5234 continue_closedown(void)
5236 if (continue_transport)
5237 for (transport_instance * t = transports; t; t = t->next)
5238 if (Ustrcmp(t->name, continue_transport) == 0)
5240 if (t->info->closedown) (t->info->closedown)(t);
5243 return DELIVER_NOT_ATTEMPTED;
5249 /*************************************************
5250 * Print address information *
5251 *************************************************/
5253 /* This function is called to output an address, or information about an
5254 address, for bounce or defer messages. If the hide_child flag is set, all we
5255 output is the original ancestor address.
5258 addr points to the address
5259 f the FILE to print to
5260 si an initial string
5261 sc a continuation string for before "generated"
5264 Returns: TRUE if the address is not hidden
5268 print_address_information(address_item *addr, FILE *f, uschar *si, uschar *sc,
5272 uschar *printed = US"";
5273 address_item *ancestor = addr;
5274 while (ancestor->parent) ancestor = ancestor->parent;
5276 fprintf(f, "%s", CS si);
5278 if (addr->parent && testflag(addr, af_hide_child))
5280 printed = US"an undisclosed address";
5283 else if (!testflag(addr, af_pfr) || !addr->parent)
5284 printed = addr->address;
5288 uschar *s = addr->address;
5291 if (addr->address[0] == '>') { ss = US"mail"; s++; }
5292 else if (addr->address[0] == '|') ss = US"pipe";
5295 fprintf(f, "%s to %s%sgenerated by ", ss, s, sc);
5296 printed = addr->parent->address;
5299 fprintf(f, "%s", CS string_printing(printed));
5301 if (ancestor != addr)
5303 uschar *original = ancestor->onetime_parent;
5304 if (!original) original= ancestor->address;
5305 if (strcmpic(original, printed) != 0)
5306 fprintf(f, "%s(%sgenerated from %s)", sc,
5307 ancestor != addr->parent ? "ultimately " : "",
5308 string_printing(original));
5311 if (addr->host_used)
5312 fprintf(f, "\n host %s [%s]",
5313 addr->host_used->name, addr->host_used->address);
5315 fprintf(f, "%s", CS se);
5323 /*************************************************
5324 * Print error for an address *
5325 *************************************************/
5327 /* This function is called to print the error information out of an address for
5328 a bounce or a warning message. It tries to format the message reasonably by
5329 introducing newlines. All lines are indented by 4; the initial printing
5330 position must be set before calling.
5332 This function used always to print the error. Nowadays we want to restrict it
5333 to cases such as LMTP/SMTP errors from a remote host, and errors from :fail:
5334 and filter "fail". We no longer pass other information willy-nilly in bounce
5335 and warning messages. Text in user_message is always output; text in message
5336 only if the af_pass_message flag is set.
5340 f the FILE to print on
5347 print_address_error(address_item * addr, FILE * f, const uschar * t)
5349 int count = Ustrlen(t);
5350 uschar * s = testflag(addr, af_pass_message) ? addr->message : NULL;
5352 if (!s && !(s = addr->user_message))
5355 fprintf(f, "\n %s", t);
5358 if (*s == '\\' && s[1] == 'n')
5368 if (*s++ == ':' && isspace(*s) && count > 45)
5370 fprintf(f, "\n "); /* sic (because space follows) */
5373 else if (count > 254) /* arbitrary limit */
5375 fprintf(f, "[truncated]");
5376 do s++; while (*s && !(*s == '\\' && s[1] == '\n'));
5382 /***********************************************************
5383 * Print Diagnostic-Code for an address *
5384 ************************************************************/
5386 /* This function is called to print the error information out of an address for
5387 a bounce or a warning message. It tries to format the message reasonably as
5388 required by RFC 3461 by adding a space after each newline
5390 it uses the same logic as print_address_error() above. if af_pass_message is true
5391 and addr->message is set it uses the remote host answer. if not addr->user_message
5392 is used instead if available.
5396 f the FILE to print on
5402 print_dsn_diagnostic_code(const address_item *addr, FILE *f)
5404 uschar * s = testflag(addr, af_pass_message) ? addr->message : NULL;
5407 /* af_pass_message and addr->message set ? print remote host answer */
5412 debug_printf("DSN Diagnostic-Code: addr->message = %s\n", addr->message);
5414 /* search first ": ". we assume to find the remote-MTA answer there */
5415 if (!(s = Ustrstr(addr->message, ": ")))
5416 return; /* not found, bail out */
5418 s += 2; /* skip ": " */
5419 cnt = fprintf(f, "Diagnostic-Code: smtp; ");
5423 if (cnt > 950) /* RFC line length limit: 998 */
5425 DEBUG(D_deliver) debug_printf("print_dsn_diagnostic_code() truncated line\n");
5426 fputs("[truncated]", f);
5430 if (*s == '\\' && s[1] == 'n')
5432 fputs("\n ", f); /* as defined in RFC 3461 */
5447 /*************************************************
5448 * Check list of addresses for duplication *
5449 *************************************************/
5451 /* This function was introduced when the test for duplicate addresses that are
5452 not pipes, files, or autoreplies was moved from the middle of routing to when
5453 routing was complete. That was to fix obscure cases when the routing history
5454 affects the subsequent routing of identical addresses. This function is called
5455 after routing, to check that the final routed addresses are not duplicates.
5457 If we detect a duplicate, we remember what it is a duplicate of. Note that
5458 pipe, file, and autoreply de-duplication is handled during routing, so we must
5459 leave such "addresses" alone here, as otherwise they will incorrectly be
5462 Argument: address of list anchor
5467 do_duplicate_check(address_item **anchor)
5470 while ((addr = *anchor))
5473 if (testflag(addr, af_pfr))
5475 anchor = &(addr->next);
5477 else if ((tnode = tree_search(tree_duplicates, addr->unique)))
5479 DEBUG(D_deliver|D_route)
5480 debug_printf("%s is a duplicate address: discarded\n", addr->unique);
5481 *anchor = addr->next;
5482 addr->dupof = tnode->data.ptr;
5483 addr->next = addr_duplicate;
5484 addr_duplicate = addr;
5488 tree_add_duplicate(addr->unique, addr);
5489 anchor = &(addr->next);
5497 /************************************************/
5500 print_dsn_addr_action(FILE * f, address_item * addr,
5501 uschar * action, uschar * status)
5505 if (addr->dsn_orcpt)
5506 fprintf(f,"Original-Recipient: %s\n", addr->dsn_orcpt);
5508 for (pa = addr; pa->parent; ) pa = pa->parent;
5509 fprintf(f, "Action: %s\n"
5510 "Final-Recipient: rfc822;%s\n"
5512 action, pa->address, status);
5517 /* When running in the test harness, there's an option that allows us to
5518 fudge this time so as to get repeatability of the tests. Take the first
5519 time off the list. In queue runs, the list pointer gets updated in the
5523 test_harness_fudged_queue_time(int actual_time)
5526 if ( f.running_in_test_harness && *fudged_queue_times
5527 && (qt = readconf_readtime(fudged_queue_times, '/', FALSE)) >= 0)
5529 DEBUG(D_deliver) debug_printf("fudged queue_times = %s\n",
5530 fudged_queue_times);
5536 /************************************************/
5539 expand_open(const uschar * filename,
5540 const uschar * varname, const uschar * reason)
5542 const uschar * s = expand_cstring(filename);
5546 log_write(0, LOG_MAIN|LOG_PANIC,
5547 "Failed to expand %s: '%s'\n", varname, filename);
5548 else if (*s != '/' || is_tainted(s))
5549 log_write(0, LOG_MAIN|LOG_PANIC,
5550 "%s is not %s after expansion: '%s'\n",
5551 varname, *s == '/' ? "untainted" : "absolute", s);
5552 else if (!(fp = Ufopen(s, "rb")))
5553 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for %s "
5554 "message texts: %s", s, reason, strerror(errno));
5559 /* Output the given header and string, converting either
5560 the sequence "\n" or a real newline into newline plus space.
5561 If that still takes us past column 78, look for the last space
5562 and split there too.
5563 Append a newline if string did not have one.
5564 Limit to about 1024 chars total. */
5567 dsn_put_wrapped(FILE * fp, const uschar * header, const uschar * s)
5569 gstring * g = string_cat(NULL, header);
5571 g = string_cat(g, s);
5572 gstring_release_unused(g);
5573 fprintf(fp, "%s\n", wrap_header(string_from_gstring(g), 79, 1023, US" ", 1));
5579 /*************************************************
5580 * Send a bounce message *
5581 *************************************************/
5583 /* Find the error address for the first address, then send a message that
5584 includes all failed addresses that have the same error address. Note the
5585 bounce_recipient is a global so that it can be accessed by $bounce_recipient
5586 while creating a customized error message. */
5589 send_bounce_message(time_t now, const uschar * logtod)
5594 if (!(bounce_recipient = addr_failed->prop.errors_address))
5595 bounce_recipient = sender_address;
5597 /* Make a subprocess to send a message, using its stdin */
5599 if ((pid = child_open_exim(&fd, US"bounce-message")) < 0)
5600 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to "
5601 "create child process to send failure message: %s", getpid(),
5602 getppid(), strerror(errno));
5604 /* Creation of child succeeded */
5608 int ch, rc, filecount = 0, rcount = 0;
5609 uschar * bcc, * emf_text;
5610 FILE * fp = fdopen(fd, "wb"), * emf = NULL;
5611 BOOL to_sender = strcmpic(sender_address, bounce_recipient) == 0;
5612 int max = (bounce_return_size_limit/DELIVER_IN_BUFFER_SIZE + 1) *
5613 DELIVER_IN_BUFFER_SIZE;
5614 uschar * bound, * dsnlimitmsg, * dsnnotifyhdr;
5616 address_item ** paddr;
5617 address_item * msgchain = NULL, ** pmsgchain = &msgchain;
5618 address_item * handled_addr = NULL;
5621 debug_printf("sending error message to: %s\n", bounce_recipient);
5623 /* Scan the addresses for all that have the same errors address, removing
5624 them from the addr_failed chain, and putting them on msgchain. */
5626 paddr = &addr_failed;
5627 for (address_item * addr = addr_failed; addr; addr = *paddr)
5628 if (Ustrcmp(bounce_recipient, addr->prop.errors_address
5629 ? addr->prop.errors_address : sender_address) == 0)
5630 { /* The same - dechain */
5631 *paddr = addr->next;
5634 pmsgchain = &addr->next;
5637 paddr = &addr->next; /* Not the same; skip */
5639 /* Include X-Failed-Recipients: for automatic interpretation, but do
5640 not let any one header line get too long. We do this by starting a
5641 new header every 50 recipients. Omit any addresses for which the
5642 "hide_child" flag is set. */
5644 for (address_item * addr = msgchain; addr; addr = addr->next)
5646 if (testflag(addr, af_hide_child)) continue;
5654 ? "X-Failed-Recipients: "
5656 testflag(addr, af_pfr) && addr->parent
5657 ? string_printing(addr->parent->address)
5658 : string_printing(addr->address));
5660 if (rcount > 0) fprintf(fp, "\n");
5662 /* Output the standard headers */
5664 if (errors_reply_to)
5665 fprintf(fp, "Reply-To: %s\n", errors_reply_to);
5666 fprintf(fp, "Auto-Submitted: auto-replied\n");
5667 moan_write_from(fp);
5668 fprintf(fp, "To: %s\n", bounce_recipient);
5669 moan_write_references(fp, NULL);
5671 /* generate boundary string and output MIME-Headers */
5672 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
5674 fprintf(fp, "Content-Type: multipart/report;"
5675 " report-type=delivery-status; boundary=%s\n"
5676 "MIME-Version: 1.0\n",
5679 /* Open a template file if one is provided. Log failure to open, but
5680 carry on - default texts will be used. */
5682 if (bounce_message_file)
5683 emf = expand_open(bounce_message_file,
5684 US"bounce_message_file", US"error");
5686 /* Quietly copy to configured additional addresses if required. */
5688 if ((bcc = moan_check_errorcopy(bounce_recipient)))
5689 fprintf(fp, "Bcc: %s\n", bcc);
5691 /* The texts for the message can be read from a template file; if there
5692 isn't one, or if it is too short, built-in texts are used. The first
5693 emf text is a Subject: and any other headers. */
5695 if ((emf_text = next_emf(emf, US"header")))
5696 fprintf(fp, "%s\n", emf_text);
5698 fprintf(fp, "Subject: Mail delivery failed%s\n\n",
5699 to_sender? ": returning message to sender" : "");
5701 /* output human readable part as text/plain section */
5702 fprintf(fp, "--%s\n"
5703 "Content-type: text/plain; charset=us-ascii\n\n",
5706 if ((emf_text = next_emf(emf, US"intro")))
5707 fprintf(fp, "%s", CS emf_text);
5711 /* This message has been reworded several times. It seems to be confusing to
5712 somebody, however it is worded. I have retreated to the original, simple
5714 "This message was created automatically by mail delivery software.\n");
5716 if (bounce_message_text)
5717 fprintf(fp, "%s", CS bounce_message_text);
5720 "\nA message that you sent could not be delivered to one or more of its\n"
5721 "recipients. This is a permanent error. The following address(es) failed:\n");
5724 "\nA message sent by\n\n <%s>\n\n"
5725 "could not be delivered to one or more of its recipients. The following\n"
5726 "address(es) failed:\n", sender_address);
5730 /* Process the addresses, leaving them on the msgchain if they have a
5731 file name for a return message. (There has already been a check in
5732 post_process_one() for the existence of data in the message file.) A TRUE
5733 return from print_address_information() means that the address is not
5737 for (address_item * addr = msgchain; addr; addr = *paddr)
5739 if (print_address_information(addr, fp, US" ", US"\n ", US""))
5740 print_address_error(addr, fp, US"");
5742 /* End the final line for the address */
5746 /* Leave on msgchain if there's a return file. */
5748 if (addr->return_file >= 0)
5750 paddr = &(addr->next);
5754 /* Else save so that we can tick off the recipient when the
5759 *paddr = addr->next;
5760 addr->next = handled_addr;
5761 handled_addr = addr;
5767 /* Get the next text, whether we need it or not, so as to be
5768 positioned for the one after. */
5770 emf_text = next_emf(emf, US"generated text");
5772 /* If there were any file messages passed by the local transports,
5773 include them in the message. Then put the address on the handled chain.
5774 In the case of a batch of addresses that were all sent to the same
5775 transport, the return_file field in all of them will contain the same
5776 fd, and the return_filename field in the *last* one will be set (to the
5777 name of the file). */
5781 address_item * nextaddr;
5784 fprintf(fp, "%s", CS emf_text);
5787 "The following text was generated during the delivery "
5788 "attempt%s:\n", (filecount > 1)? "s" : "");
5790 for (address_item * addr = msgchain; addr; addr = nextaddr)
5793 address_item *topaddr = addr;
5795 /* List all the addresses that relate to this file */
5798 while(addr) /* Insurance */
5800 print_address_information(addr, fp, US"------ ", US"\n ",
5802 if (addr->return_filename) break;
5807 /* Now copy the file */
5809 if (!(fm = Ufopen(addr->return_filename, "rb")))
5810 fprintf(fp, " +++ Exim error... failed to open text file: %s\n",
5814 while ((ch = fgetc(fm)) != EOF) fputc(ch, fp);
5817 Uunlink(addr->return_filename);
5819 /* Can now add to handled chain, first fishing off the next
5820 address on the msgchain. */
5822 nextaddr = addr->next;
5823 addr->next = handled_addr;
5824 handled_addr = topaddr;
5829 /* output machine readable part */
5831 if (message_smtputf8)
5832 fprintf(fp, "--%s\n"
5833 "Content-type: message/global-delivery-status\n\n"
5834 "Reporting-MTA: dns; %s\n",
5835 bound, smtp_active_hostname);
5838 fprintf(fp, "--%s\n"
5839 "Content-type: message/delivery-status\n\n"
5840 "Reporting-MTA: dns; %s\n",
5841 bound, smtp_active_hostname);
5845 /* must be decoded from xtext: see RFC 3461:6.3a */
5846 uschar * xdec_envid;
5847 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
5848 fprintf(fp, "Original-Envelope-ID: %s\n", dsn_envid);
5850 fprintf(fp, "X-Original-Envelope-ID: error decoding xtext formatted ENVID\n");
5854 for (address_item * addr = handled_addr; addr; addr = addr->next)
5858 print_dsn_addr_action(fp, addr, US"failed", US"5.0.0");
5860 if ((hu = addr->host_used) && hu->name)
5862 fprintf(fp, "Remote-MTA: dns; %s\n", hu->name);
5863 #ifdef EXPERIMENTAL_DSN_INFO
5868 uschar * p = hu->port == 25
5869 ? US"" : string_sprintf(":%d", hu->port);
5870 fprintf(fp, "Remote-MTA: X-ip; [%s]%s\n", hu->address, p);
5872 if ((s = addr->smtp_greeting) && *s)
5873 dsn_put_wrapped(fp, US"X-Remote-MTA-smtp-greeting: X-str; ", s);
5874 if ((s = addr->helo_response) && *s)
5875 dsn_put_wrapped(fp, US"X-Remote-MTA-helo-response: X-str; ", s);
5876 if ((s = addr->message) && *s)
5877 dsn_put_wrapped(fp, US"X-Exim-Diagnostic: X-str; ", s);
5880 print_dsn_diagnostic_code(addr, fp);
5885 /* Now copy the message, trying to give an intelligible comment if
5886 it is too long for it all to be copied. The limit isn't strictly
5887 applied because of the buffering. There is, however, an option
5888 to suppress copying altogether. */
5890 emf_text = next_emf(emf, US"copy");
5893 we ignore the intro text from template and add
5894 the text for bounce_return_size_limit at the end.
5896 bounce_return_message is ignored
5897 in case RET= is defined we honor these values
5898 otherwise bounce_return_body is honored.
5900 bounce_return_size_limit is always honored.
5903 fprintf(fp, "--%s\n", bound);
5905 dsnlimitmsg = US"X-Exim-DSN-Information: Due to administrative limits only headers are returned";
5906 dsnnotifyhdr = NULL;
5907 topt = topt_add_return_path;
5909 /* RET=HDRS? top priority */
5910 if (dsn_ret == dsn_ret_hdrs)
5911 topt |= topt_no_body;
5914 struct stat statbuf;
5916 /* no full body return at all? */
5917 if (!bounce_return_body)
5919 topt |= topt_no_body;
5920 /* add header if we overrule RET=FULL */
5921 if (dsn_ret == dsn_ret_full)
5922 dsnnotifyhdr = dsnlimitmsg;
5924 /* line length limited... return headers only if oversize */
5925 /* size limited ... return headers only if limit reached */
5926 else if ( max_received_linelength > bounce_return_linesize_limit
5927 || ( bounce_return_size_limit > 0
5928 && fstat(deliver_datafile, &statbuf) == 0
5929 && statbuf.st_size > max
5932 topt |= topt_no_body;
5933 dsnnotifyhdr = dsnlimitmsg;
5938 if (message_smtputf8)
5939 fputs(topt & topt_no_body ? "Content-type: message/global-headers\n\n"
5940 : "Content-type: message/global\n\n",
5944 fputs(topt & topt_no_body ? "Content-type: text/rfc822-headers\n\n"
5945 : "Content-type: message/rfc822\n\n",
5949 transport_filter_argv = NULL; /* Just in case */
5950 return_path = sender_address; /* In case not previously set */
5951 { /* Dummy transport for headers add */
5952 transport_ctx tctx = {{0}};
5953 transport_instance tb = {0};
5955 tctx.u.fd = fileno(fp);
5957 tctx.options = topt;
5958 tb.add_headers = dsnnotifyhdr;
5960 /*XXX no checking for failure! buggy! */
5961 transport_write_message(&tctx, 0);
5965 /* we never add the final text. close the file */
5969 fprintf(fp, "\n--%s--\n", bound);
5971 /* Close the file, which should send an EOF to the child process
5972 that is receiving the message. Wait for it to finish. */
5975 rc = child_close(pid, 0); /* Waits for child to close, no timeout */
5977 /* If the process failed, there was some disaster in setting up the
5978 error message. Unless the message is very old, ensure that addr_defer
5979 is non-null, which will have the effect of leaving the message on the
5980 spool. The failed addresses will get tried again next time. However, we
5981 don't really want this to happen too often, so freeze the message unless
5982 there are some genuine deferred addresses to try. To do this we have
5983 to call spool_write_header() here, because with no genuine deferred
5984 addresses the normal code below doesn't get run. */
5989 if (now - received_time.tv_sec < retry_maximum_timeout && !addr_defer)
5991 addr_defer = (address_item *)(+1);
5992 f.deliver_freeze = TRUE;
5993 deliver_frozen_at = time(NULL);
5994 /* Panic-dies on error */
5995 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
5998 deliver_msglog("Process failed (%d) when writing error message "
5999 "to %s%s", rc, bounce_recipient, s);
6000 log_write(0, LOG_MAIN, "Process failed (%d) when writing error message "
6001 "to %s%s", rc, bounce_recipient, s);
6004 /* The message succeeded. Ensure that the recipients that failed are
6005 now marked finished with on the spool and their parents updated. */
6009 for (address_item * addr = handled_addr; addr; addr = addr->next)
6011 address_done(addr, logtod);
6012 child_done(addr, logtod);
6014 /* Panic-dies on error */
6015 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
6020 /*************************************************
6021 * Send a warning message *
6022 *************************************************/
6023 /* Return: boolean success */
6026 send_warning_message(const uschar * recipients, int queue_time, int show_time)
6029 pid_t pid = child_open_exim(&fd, US"delay-warning-message");
6030 FILE * wmf = NULL, * f = fdopen(fd, "wb");
6031 uschar * wmf_text, * bound;
6032 transport_ctx tctx = {{0}};
6035 if (pid <= 0) return FALSE;
6037 if (warn_message_file)
6038 wmf = expand_open(warn_message_file,
6039 US"warn_message_file", US"warning");
6041 warnmsg_recipients = recipients;
6042 warnmsg_delay = queue_time < 120*60
6043 ? string_sprintf("%d minutes", show_time/60)
6044 : string_sprintf("%d hours", show_time/3600);
6046 if (errors_reply_to)
6047 fprintf(f, "Reply-To: %s\n", errors_reply_to);
6048 fprintf(f, "Auto-Submitted: auto-replied\n");
6050 fprintf(f, "To: %s\n", recipients);
6051 moan_write_references(f, NULL);
6053 /* generated boundary string and output MIME-Headers */
6054 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
6056 fprintf(f, "Content-Type: multipart/report;"
6057 " report-type=delivery-status; boundary=%s\n"
6058 "MIME-Version: 1.0\n",
6061 if ((wmf_text = next_emf(wmf, US"header")))
6062 fprintf(f, "%s\n", wmf_text);
6064 fprintf(f, "Subject: Warning: message %s delayed %s\n\n",
6065 message_id, warnmsg_delay);
6067 /* output human readable part as text/plain section */
6069 "Content-type: text/plain; charset=us-ascii\n\n",
6072 if ((wmf_text = next_emf(wmf, US"intro")))
6073 fprintf(f, "%s", CS wmf_text);
6077 "This message was created automatically by mail delivery software.\n");
6079 if (Ustrcmp(recipients, sender_address) == 0)
6081 "A message that you sent has not yet been delivered to one or more of its\n"
6082 "recipients after more than ");
6086 "A message sent by\n\n <%s>\n\n"
6087 "has not yet been delivered to one or more of its recipients after more than \n",
6090 fprintf(f, "%s on the queue on %s.\n\n"
6091 "The message identifier is: %s\n",
6092 warnmsg_delay, primary_hostname, message_id);
6094 for (header_line * h = header_list; h; h = h->next)
6095 if (strncmpic(h->text, US"Subject:", 8) == 0)
6096 fprintf(f, "The subject of the message is: %s", h->text + 9);
6097 else if (strncmpic(h->text, US"Date:", 5) == 0)
6098 fprintf(f, "The date of the message is: %s", h->text + 6);
6101 fprintf(f, "The address%s to which the message has not yet been "
6103 !addr_defer->next ? "" : "es",
6104 !addr_defer->next ? "is": "are");
6107 /* List the addresses, with error information if allowed */
6110 for (address_item * addr = addr_defer; addr; addr = addr->next)
6112 if (print_address_information(addr, f, US" ", US"\n ", US""))
6113 print_address_error(addr, f, US"Delay reason: ");
6122 if ((wmf_text = next_emf(wmf, US"final")))
6123 fprintf(f, "%s", CS wmf_text);
6129 "No action is required on your part. Delivery attempts will continue for\n"
6130 "some time, and this warning may be repeated at intervals if the message\n"
6131 "remains undelivered. Eventually the mail delivery software will give up,\n"
6132 "and when that happens, the message will be returned to you.\n");
6135 /* output machine readable part */
6136 fprintf(f, "\n--%s\n"
6137 "Content-type: message/delivery-status\n\n"
6138 "Reporting-MTA: dns; %s\n",
6140 smtp_active_hostname);
6145 /* must be decoded from xtext: see RFC 3461:6.3a */
6147 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
6148 fprintf(f,"Original-Envelope-ID: %s\n", dsn_envid);
6150 fprintf(f,"X-Original-Envelope-ID: error decoding xtext formatted ENVID\n");
6154 for (address_item * addr = addr_defer; addr; addr = addr->next)
6158 print_dsn_addr_action(f, addr, US"delayed", US"4.0.0");
6160 if ((hu = addr->host_used) && hu->name)
6162 fprintf(f, "Remote-MTA: dns; %s\n", hu->name);
6163 print_dsn_diagnostic_code(addr, f);
6169 "Content-type: text/rfc822-headers\n\n",
6173 /* header only as required by RFC. only failure DSN needs to honor RET=FULL */
6174 tctx.u.fd = fileno(f);
6175 tctx.options = topt_add_return_path | topt_no_body;
6176 transport_filter_argv = NULL; /* Just in case */
6177 return_path = sender_address; /* In case not previously set */
6179 /* Write the original email out */
6180 /*XXX no checking for failure! buggy! */
6181 /*XXX overlong headers in the original become overlong body lines here*/
6182 transport_write_message(&tctx, 0);
6185 fprintf(f,"\n--%s--\n", bound);
6189 /* Close and wait for child process to complete, without a timeout.
6190 If there's an error, don't update the count. */
6193 return child_close(pid, 0) == 0;
6196 /*************************************************
6197 * Send a success-DSN *
6198 *************************************************/
6201 maybe_send_dsn(void)
6203 address_item * addr_senddsn = NULL;
6205 for (address_item * a = addr_succeed; a; a = a->next)
6207 /* af_ignore_error not honored here. it's not an error */
6208 DEBUG(D_deliver) debug_printf("DSN: processing router : %s\n"
6209 "DSN: processing successful delivery address: %s\n"
6210 "DSN: Sender_address: %s\n"
6211 "DSN: orcpt: %s flags: 0x%x\n"
6212 "DSN: envid: %s ret: %d\n"
6213 "DSN: Final recipient: %s\n"
6214 "DSN: Remote SMTP server supports DSN: %d\n",
6215 a->router ? a->router->name : US"(unknown)",
6218 a->dsn_orcpt ? a->dsn_orcpt : US"NULL",
6220 dsn_envid ? dsn_envid : US"NULL", dsn_ret,
6225 /* send report if next hop not DSN aware or a router flagged "last DSN hop"
6226 and a report was requested */
6228 if ( (a->dsn_aware != dsn_support_yes || a->dsn_flags & rf_dsnlasthop)
6229 && a->dsn_flags & rf_notify_success
6232 /* copy and relink address_item and send report with all of them at once later */
6233 address_item * addr_next = addr_senddsn;
6234 addr_senddsn = store_get(sizeof(address_item), GET_UNTAINTED);
6236 addr_senddsn->next = addr_next;
6239 DEBUG(D_deliver) debug_printf("DSN: not sending DSN success message\n");
6243 { /* create exim process to send message */
6245 pid_t pid = child_open_exim(&fd, US"DSN");
6247 DEBUG(D_deliver) debug_printf("DSN: child_open_exim returns: %d\n", pid);
6249 if (pid < 0) /* Creation of child failed */
6251 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to "
6252 "create child process to send success-dsn message: %s", getpid(),
6253 getppid(), strerror(errno));
6255 DEBUG(D_deliver) debug_printf("DSN: child_open_exim failed\n");
6257 else /* Creation of child succeeded */
6259 FILE * f = fdopen(fd, "wb");
6260 /* header only as required by RFC. only failure DSN needs to honor RET=FULL */
6262 transport_ctx tctx = {{0}};
6265 debug_printf("sending success-dsn to: %s\n", sender_address);
6267 /* build unique id for MIME boundary */
6268 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
6269 DEBUG(D_deliver) debug_printf("DSN: MIME boundary: %s\n", bound);
6271 if (errors_reply_to)
6272 fprintf(f, "Reply-To: %s\n", errors_reply_to);
6275 fprintf(f, "Auto-Submitted: auto-generated\n"
6277 "Subject: Delivery Status Notification\n",
6279 moan_write_references(f, NULL);
6280 fprintf(f, "Content-Type: multipart/report;"
6281 " report-type=delivery-status; boundary=%s\n"
6282 "MIME-Version: 1.0\n\n"
6285 "Content-type: text/plain; charset=us-ascii\n\n"
6287 "This message was created automatically by mail delivery software.\n"
6288 " ----- The following addresses had successful delivery notifications -----\n",
6291 for (address_item * a = addr_senddsn; a; a = a->next)
6292 fprintf(f, "<%s> (relayed %s)\n\n",
6294 a->dsn_flags & rf_dsnlasthop ? "via non DSN router"
6295 : a->dsn_aware == dsn_support_no ? "to non-DSN-aware mailer"
6296 : "via non \"Remote SMTP\" router"
6300 "Content-type: message/delivery-status\n\n"
6301 "Reporting-MTA: dns; %s\n",
6302 bound, smtp_active_hostname);
6305 { /* must be decoded from xtext: see RFC 3461:6.3a */
6306 uschar * xdec_envid;
6307 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
6308 fprintf(f, "Original-Envelope-ID: %s\n", dsn_envid);
6310 fprintf(f, "X-Original-Envelope-ID: error decoding xtext formatted ENVID\n");
6314 for (address_item * a = addr_senddsn; a; a = a->next)
6318 print_dsn_addr_action(f, a, US"delivered", US"2.0.0");
6320 if ((hu = a->host_used) && hu->name)
6321 fprintf(f, "Remote-MTA: dns; %s\nDiagnostic-Code: smtp; 250 Ok\n\n",
6324 fprintf(f, "Diagnostic-Code: X-Exim; relayed via non %s router\n\n",
6325 a->dsn_flags & rf_dsnlasthop ? "DSN" : "SMTP");
6328 fprintf(f, "--%s\nContent-type: text/rfc822-headers\n\n", bound);
6331 transport_filter_argv = NULL; /* Just in case */
6332 return_path = sender_address; /* In case not previously set */
6334 /* Write the original email out */
6337 tctx.options = topt_add_return_path | topt_no_body;
6338 /*XXX hmm, FALSE(fail) retval ignored.
6339 Could error for any number of reasons, and they are not handled. */
6340 transport_write_message(&tctx, 0);
6343 fprintf(f,"\n--%s--\n", bound);
6347 (void) child_close(pid, 0); /* Waits for child to close, no timeout */
6352 /*************************************************
6353 * Deliver one message *
6354 *************************************************/
6356 /* This is the function which is called when a message is to be delivered. It
6357 is passed the id of the message. It is possible that the message no longer
6358 exists, if some other process has delivered it, and it is also possible that
6359 the message is being worked on by another process, in which case the data file
6362 If no delivery is attempted for any of the above reasons, the function returns
6363 DELIVER_NOT_ATTEMPTED.
6365 If the give_up flag is set true, do not attempt any deliveries, but instead
6366 fail all outstanding addresses and return the message to the sender (or
6369 A delivery operation has a process all to itself; we never deliver more than
6370 one message in the same process. Therefore we needn't worry too much about
6373 Liable to be called as root.
6376 id the id of the message to be delivered
6377 forced TRUE if delivery was forced by an administrator; this overrides
6378 retry delays and causes a delivery to be tried regardless
6379 give_up TRUE if an administrator has requested that delivery attempts
6382 Returns: When the global variable mua_wrapper is FALSE:
6383 DELIVER_ATTEMPTED_NORMAL if a delivery attempt was made
6384 DELIVER_NOT_ATTEMPTED otherwise (see comment above)
6385 When the global variable mua_wrapper is TRUE:
6386 DELIVER_MUA_SUCCEEDED if delivery succeeded
6387 DELIVER_MUA_FAILED if delivery failed
6388 DELIVER_NOT_ATTEMPTED if not attempted (should not occur)
6392 deliver_message(uschar *id, BOOL forced, BOOL give_up)
6395 int final_yield = DELIVER_ATTEMPTED_NORMAL;
6396 time_t now = time(NULL);
6397 address_item *addr_last = NULL;
6398 uschar *filter_message = NULL;
6399 int process_recipients = RECIP_ACCEPT;
6402 extern int acl_where;
6405 #ifdef MEASURE_TIMING
6406 report_time_since(×tamp_startup, US"delivery start"); /* testcase 0022, 2100 */
6409 info = queue_run_pid == (pid_t)0
6410 ? string_sprintf("delivering %s", id)
6411 : string_sprintf("delivering %s (queue run pid %d)", id, queue_run_pid);
6413 /* If the D_process_info bit is on, set_process_info() will output debugging
6414 information. If not, we want to show this initial information if D_deliver or
6415 D_queue_run is set or in verbose mode. */
6417 set_process_info("%s", info);
6419 if ( !(debug_selector & D_process_info)
6420 && (debug_selector & (D_deliver|D_queue_run|D_v))
6422 debug_printf("%s\n", info);
6424 /* Ensure that we catch any subprocesses that are created. Although Exim
6425 sets SIG_DFL as its initial default, some routes through the code end up
6426 here with it set to SIG_IGN - cases where a non-synchronous delivery process
6427 has been forked, but no re-exec has been done. We use sigaction rather than
6428 plain signal() on those OS where SA_NOCLDWAIT exists, because we want to be
6429 sure it is turned off. (There was a problem on AIX with this.) */
6433 struct sigaction act;
6434 act.sa_handler = SIG_DFL;
6435 sigemptyset(&(act.sa_mask));
6437 sigaction(SIGCHLD, &act, NULL);
6440 signal(SIGCHLD, SIG_DFL);
6443 /* Make the forcing flag available for routers and transports, set up the
6444 global message id field, and initialize the count for returned files and the
6445 message size. This use of strcpy() is OK because the length id is checked when
6446 it is obtained from a command line (the -M or -q options), and otherwise it is
6447 known to be a valid message id. */
6449 if (id != message_id)
6450 Ustrcpy(message_id, id);
6451 f.deliver_force = forced;
6455 /* Initialize some flags */
6457 update_spool = FALSE;
6458 remove_journal = TRUE;
6460 /* Set a known context for any ACLs we call via expansions */
6461 acl_where = ACL_WHERE_DELIVERY;
6463 /* Reset the random number generator, so that if several delivery processes are
6464 started from a queue runner that has already used random numbers (for sorting),
6465 they don't all get the same sequence. */
6469 /* Open and lock the message's data file. Exim locks on this one because the
6470 header file may get replaced as it is re-written during the delivery process.
6471 Any failures cause messages to be written to the log, except for missing files
6472 while queue running - another process probably completed delivery. As part of
6473 opening the data file, message_subdir gets set. */
6475 if ((deliver_datafile = spool_open_datafile(id)) < 0)
6476 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
6478 /* The value of message_size at this point has been set to the data length,
6479 plus one for the blank line that notionally precedes the data. */
6481 /* Now read the contents of the header file, which will set up the headers in
6482 store, and also the list of recipients and the tree of non-recipients and
6483 assorted flags. It updates message_size. If there is a reading or format error,
6484 give up; if the message has been around for sufficiently long, remove it. */
6487 uschar * spoolname = string_sprintf("%s-H", id);
6488 if ((rc = spool_read_header(spoolname, TRUE, TRUE)) != spool_read_OK)
6490 if (errno == ERRNO_SPOOLFORMAT)
6492 struct stat statbuf;
6493 if (Ustat(spool_fname(US"input", message_subdir, spoolname, US""),
6495 log_write(0, LOG_MAIN, "Format error in spool file %s: "
6496 "size=" OFF_T_FMT, spoolname, statbuf.st_size);
6498 log_write(0, LOG_MAIN, "Format error in spool file %s", spoolname);
6501 log_write(0, LOG_MAIN, "Error reading spool file %s: %s", spoolname,
6504 /* If we managed to read the envelope data, received_time contains the
6505 time the message was received. Otherwise, we can calculate it from the
6508 if (rc != spool_read_hdrerror)
6510 received_time.tv_sec = received_time.tv_usec = 0;
6511 /*XXX subsec precision?*/
6512 for (i = 0; i < 6; i++)
6513 received_time.tv_sec = received_time.tv_sec * BASE_62 + tab62[id[i] - '0'];
6516 /* If we've had this malformed message too long, sling it. */
6518 if (now - received_time.tv_sec > keep_malformed)
6520 Uunlink(spool_fname(US"msglog", message_subdir, id, US""));
6521 Uunlink(spool_fname(US"input", message_subdir, id, US"-D"));
6522 Uunlink(spool_fname(US"input", message_subdir, id, US"-H"));
6523 Uunlink(spool_fname(US"input", message_subdir, id, US"-J"));
6524 log_write(0, LOG_MAIN, "Message removed because older than %s",
6525 readconf_printtime(keep_malformed));
6528 (void)close(deliver_datafile);
6529 deliver_datafile = -1;
6530 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
6534 /* The spool header file has been read. Look to see if there is an existing
6535 journal file for this message. If there is, it means that a previous delivery
6536 attempt crashed (program or host) before it could update the spool header file.
6537 Read the list of delivered addresses from the journal and add them to the
6538 nonrecipients tree. Then update the spool file. We can leave the journal in
6539 existence, as it will get further successful deliveries added to it in this
6540 run, and it will be deleted if this function gets to its end successfully.
6541 Otherwise it might be needed again. */
6544 uschar * fname = spool_fname(US"input", message_subdir, id, US"-J");
6547 if ( (journal_fd = Uopen(fname,
6548 O_RDWR|O_APPEND | EXIM_CLOEXEC | EXIM_NOFOLLOW, SPOOL_MODE)) >= 0
6549 && lseek(journal_fd, 0, SEEK_SET) == 0
6550 && (jread = fdopen(journal_fd, "rb"))
6553 while (Ufgets(big_buffer, big_buffer_size, jread))
6555 int n = Ustrlen(big_buffer);
6556 big_buffer[n-1] = 0;
6557 tree_add_nonrecipient(big_buffer);
6558 DEBUG(D_deliver) debug_printf("Previously delivered address %s taken from "
6559 "journal file\n", big_buffer);
6562 if ((journal_fd = dup(fileno(jread))) < 0)
6563 journal_fd = fileno(jread);
6565 (void) fclose(jread); /* Try to not leak the FILE resource */
6567 /* Panic-dies on error */
6568 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
6570 else if (errno != ENOENT)
6572 log_write(0, LOG_MAIN|LOG_PANIC, "attempt to open journal for reading gave: "
6573 "%s", strerror(errno));
6574 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
6577 /* A null recipients list indicates some kind of disaster. */
6579 if (!recipients_list)
6581 (void)close(deliver_datafile);
6582 deliver_datafile = -1;
6583 log_write(0, LOG_MAIN, "Spool error: no recipients for %s", fname);
6584 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
6589 /* Handle a message that is frozen. There are a number of different things that
6590 can happen, but in the default situation, unless forced, no delivery is
6593 if (f.deliver_freeze)
6595 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
6596 /* Moving to another directory removes the message from Exim's view. Other
6597 tools must be used to deal with it. Logging of this action happens in
6598 spool_move_message() and its subfunctions. */
6600 if ( move_frozen_messages
6601 && spool_move_message(id, message_subdir, US"", US"F")
6603 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
6606 /* For all frozen messages (bounces or not), timeout_frozen_after sets the
6607 maximum time to keep messages that are frozen. Thaw if we reach it, with a
6608 flag causing all recipients to be failed. The time is the age of the
6609 message, not the time since freezing. */
6611 if (timeout_frozen_after > 0 && message_age >= timeout_frozen_after)
6613 log_write(0, LOG_MAIN, "cancelled by timeout_frozen_after");
6614 process_recipients = RECIP_FAIL_TIMEOUT;
6617 /* For bounce messages (and others with no sender), thaw if the error message
6618 ignore timer is exceeded. The message will be discarded if this delivery
6621 else if (!*sender_address && message_age >= ignore_bounce_errors_after)
6622 log_write(0, LOG_MAIN, "Unfrozen by errmsg timer");
6624 /* If this is a bounce message, or there's no auto thaw, or we haven't
6625 reached the auto thaw time yet, and this delivery is not forced by an admin
6626 user, do not attempt delivery of this message. Note that forced is set for
6627 continuing messages down the same channel, in order to skip load checking and
6628 ignore hold domains, but we don't want unfreezing in that case. */
6632 if ( ( sender_address[0] == 0
6634 || now <= deliver_frozen_at + auto_thaw
6636 && ( !forced || !f.deliver_force_thaw
6637 || !f.admin_user || continue_hostname
6640 (void)close(deliver_datafile);
6641 deliver_datafile = -1;
6642 log_write(L_skip_delivery, LOG_MAIN, "Message is frozen");
6643 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
6646 /* If delivery was forced (by an admin user), assume a manual thaw.
6647 Otherwise it's an auto thaw. */
6651 f.deliver_manual_thaw = TRUE;
6652 log_write(0, LOG_MAIN, "Unfrozen by forced delivery");
6654 else log_write(0, LOG_MAIN, "Unfrozen by auto-thaw");
6657 /* We get here if any of the rules for unfreezing have triggered. */
6659 f.deliver_freeze = FALSE;
6660 update_spool = TRUE;
6664 /* Open the message log file if we are using them. This records details of
6665 deliveries, deferments, and failures for the benefit of the mail administrator.
6666 The log is not used by exim itself to track the progress of a message; that is
6667 done by rewriting the header spool file. */
6671 uschar * fname = spool_fname(US"msglog", message_subdir, id, US"");
6675 if ((fd = open_msglog_file(fname, SPOOL_MODE, &error)) < 0)
6677 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't %s message log %s: %s", error,
6678 fname, strerror(errno));
6679 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
6682 /* Make a stdio stream out of it. */
6684 if (!(message_log = fdopen(fd, "a")))
6686 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't fdopen message log %s: %s",
6687 fname, strerror(errno));
6688 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
6693 /* If asked to give up on a message, log who did it, and set the action for all
6698 struct passwd *pw = getpwuid(real_uid);
6699 log_write(0, LOG_MAIN, "cancelled by %s",
6700 pw ? US pw->pw_name : string_sprintf("uid %ld", (long int)real_uid));
6701 process_recipients = RECIP_FAIL;
6704 /* Otherwise, if there are too many Received: headers, fail all recipients. */
6706 else if (received_count > received_headers_max)
6707 process_recipients = RECIP_FAIL_LOOP;
6709 /* Otherwise, if a system-wide, address-independent message filter is
6710 specified, run it now, except in the case when we are failing all recipients as
6711 a result of timeout_frozen_after. If the system filter yields "delivered", then
6712 ignore the true recipients of the message. Failure of the filter file is
6713 logged, and the delivery attempt fails. */
6715 else if (system_filter && process_recipients != RECIP_FAIL_TIMEOUT)
6720 redirect_block redirect;
6722 if (system_filter_uid_set)
6724 ugid.uid = system_filter_uid;
6725 ugid.gid = system_filter_gid;
6726 ugid.uid_set = ugid.gid_set = TRUE;
6729 ugid.uid_set = ugid.gid_set = FALSE;
6731 return_path = sender_address;
6732 f.enable_dollar_recipients = TRUE; /* Permit $recipients in system filter */
6733 f.system_filtering = TRUE;
6735 /* Any error in the filter file causes a delivery to be abandoned. */
6737 redirect.string = system_filter;
6738 redirect.isfile = TRUE;
6739 redirect.check_owner = redirect.check_group = FALSE;
6740 redirect.owners = NULL;
6741 redirect.owngroups = NULL;
6743 redirect.modemask = 0;
6745 DEBUG(D_deliver|D_filter) debug_printf("running system filter\n");
6748 &redirect, /* Where the data is */
6749 RDO_DEFER | /* Turn on all the enabling options */
6750 RDO_FAIL | /* Leave off all the disabling options */
6755 NULL, /* No :include: restriction (not used in filter) */
6756 NULL, /* No sieve vacation directory (not sieve!) */
6757 NULL, /* No sieve enotify mailto owner (not sieve!) */
6758 NULL, /* No sieve user address (not sieve!) */
6759 NULL, /* No sieve subaddress (not sieve!) */
6760 &ugid, /* uid/gid data */
6761 &addr_new, /* Where to hang generated addresses */
6762 &filter_message, /* Where to put error message */
6763 NULL, /* Don't skip syntax errors */
6764 &filtertype, /* Will always be set to FILTER_EXIM for this call */
6765 US"system filter"); /* For error messages */
6767 DEBUG(D_deliver|D_filter) debug_printf("system filter returned %d\n", rc);
6769 if (rc == FF_ERROR || rc == FF_NONEXIST)
6771 (void)close(deliver_datafile);
6772 deliver_datafile = -1;
6773 log_write(0, LOG_MAIN|LOG_PANIC, "Error in system filter: %s",
6774 string_printing(filter_message));
6775 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
6778 /* Reset things. If the filter message is an empty string, which can happen
6779 for a filter "fail" or "freeze" command with no text, reset it to NULL. */
6781 f.system_filtering = FALSE;
6782 f.enable_dollar_recipients = FALSE;
6783 if (filter_message && filter_message[0] == 0) filter_message = NULL;
6785 /* Save the values of the system filter variables so that user filters
6788 memcpy(filter_sn, filter_n, sizeof(filter_sn));
6790 /* The filter can request that delivery of the original addresses be
6795 process_recipients = RECIP_DEFER;
6796 deliver_msglog("Delivery deferred by system filter\n");
6797 log_write(0, LOG_MAIN, "Delivery deferred by system filter");
6800 /* The filter can request that a message be frozen, but this does not
6801 take place if the message has been manually thawed. In that case, we must
6802 unset "delivered", which is forced by the "freeze" command to make -bF
6805 else if (rc == FF_FREEZE && !f.deliver_manual_thaw)
6807 f.deliver_freeze = TRUE;
6808 deliver_frozen_at = time(NULL);
6809 process_recipients = RECIP_DEFER;
6810 frozen_info = string_sprintf(" by the system filter%s%s",
6811 filter_message ? US": " : US"",
6812 filter_message ? filter_message : US"");
6815 /* The filter can request that a message be failed. The error message may be
6816 quite long - it is sent back to the sender in the bounce - but we don't want
6817 to fill up the log with repetitions of it. If it starts with << then the text
6818 between << and >> is written to the log, with the rest left for the bounce
6821 else if (rc == FF_FAIL)
6823 uschar *colon = US"";
6824 uschar *logmsg = US"";
6827 process_recipients = RECIP_FAIL_FILTER;
6833 if ( filter_message[0] == '<'
6834 && filter_message[1] == '<'
6835 && (logend = Ustrstr(filter_message, ">>"))
6838 logmsg = filter_message + 2;
6839 loglen = logend - logmsg;
6840 filter_message = logend + 2;
6841 if (filter_message[0] == 0) filter_message = NULL;
6845 logmsg = filter_message;
6846 loglen = Ustrlen(filter_message);
6850 log_write(0, LOG_MAIN, "cancelled by system filter%s%.*s", colon, loglen,
6854 /* Delivery can be restricted only to those recipients (if any) that the
6855 filter specified. */
6857 else if (rc == FF_DELIVERED)
6859 process_recipients = RECIP_IGNORE;
6861 log_write(0, LOG_MAIN, "original recipients ignored (system filter)");
6863 log_write(0, LOG_MAIN, "=> discarded (system filter)");
6866 /* If any new addresses were created by the filter, fake up a "parent"
6867 for them. This is necessary for pipes, etc., which are expected to have
6868 parents, and it also gives some sensible logging for others. Allow
6869 pipes, files, and autoreplies, and run them as the filter uid if set,
6870 otherwise as the current uid. */
6874 int uid = system_filter_uid_set ? system_filter_uid : geteuid();
6875 int gid = system_filter_gid_set ? system_filter_gid : getegid();
6877 /* The text "system-filter" is tested in transport_set_up_command() and in
6878 set_up_shell_command() in the pipe transport, to enable them to permit
6879 $recipients, so don't change it here without also changing it there. */
6881 address_item *p = addr_new;
6882 address_item *parent = deliver_make_addr(US"system-filter", FALSE);
6884 parent->domain = string_copylc(qualify_domain_recipient);
6885 parent->local_part = US"system-filter";
6887 /* As part of this loop, we arrange for addr_last to end up pointing
6888 at the final address. This is used if we go on to add addresses for the
6889 original recipients. */
6893 if (parent->child_count == USHRT_MAX)
6894 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "system filter generated more "
6895 "than %d delivery addresses", USHRT_MAX);
6896 parent->child_count++;
6899 if (testflag(p, af_pfr))
6905 setflag(p, af_uid_set);
6906 setflag(p, af_gid_set);
6907 setflag(p, af_allow_file);
6908 setflag(p, af_allow_pipe);
6909 setflag(p, af_allow_reply);
6911 /* Find the name of the system filter's appropriate pfr transport */
6913 if (p->address[0] == '|')
6916 tpname = system_filter_pipe_transport;
6917 address_pipe = p->address;
6919 else if (p->address[0] == '>')
6922 tpname = system_filter_reply_transport;
6926 if (p->address[Ustrlen(p->address)-1] == '/')
6928 type = US"directory";
6929 tpname = system_filter_directory_transport;
6934 tpname = system_filter_file_transport;
6936 address_file = p->address;
6939 /* Now find the actual transport, first expanding the name. We have
6940 set address_file or address_pipe above. */
6944 uschar *tmp = expand_string(tpname);
6945 address_file = address_pipe = NULL;
6947 p->message = string_sprintf("failed to expand \"%s\" as a "
6948 "system filter transport name", tpname);
6949 if (is_tainted(tmp))
6950 p->message = string_sprintf("attempt to used tainted value '%s' for"
6951 "transport '%s' as a system filter", tmp, tpname);
6955 p->message = string_sprintf("system_filter_%s_transport is unset",
6960 transport_instance *tp;
6961 for (tp = transports; tp; tp = tp->next)
6962 if (Ustrcmp(tp->name, tpname) == 0)
6968 p->message = string_sprintf("failed to find \"%s\" transport "
6969 "for system filter delivery", tpname);
6972 /* If we couldn't set up a transport, defer the delivery, putting the
6973 error on the panic log as well as the main log. */
6977 address_item *badp = p;
6979 if (!addr_last) addr_new = p; else addr_last->next = p;
6980 badp->local_part = badp->address; /* Needed for log line */
6981 post_process_one(badp, DEFER, LOG_MAIN|LOG_PANIC, EXIM_DTYPE_ROUTER, 0);
6984 } /* End of pfr handling */
6986 /* Either a non-pfr delivery, or we found a transport */
6988 DEBUG(D_deliver|D_filter)
6989 debug_printf("system filter added %s\n", p->address);
6993 } /* Loop through all addr_new addresses */
6998 /* Scan the recipients list, and for every one that is not in the non-
6999 recipients tree, add an addr item to the chain of new addresses. If the pno
7000 value is non-negative, we must set the onetime parent from it. This which
7001 points to the relevant entry in the recipients list.
7003 This processing can be altered by the setting of the process_recipients
7004 variable, which is changed if recipients are to be ignored, failed, or
7005 deferred. This can happen as a result of system filter activity, or if the -Mg
7006 option is used to fail all of them.
7008 Duplicate addresses are handled later by a different tree structure; we can't
7009 just extend the non-recipients tree, because that will be re-written to the
7010 spool if the message is deferred, and in any case there are casing
7011 complications for local addresses. */
7013 if (process_recipients != RECIP_IGNORE)
7014 for (i = 0; i < recipients_count; i++)
7015 if (!tree_search(tree_nonrecipients, recipients_list[i].address))
7017 recipient_item *r = recipients_list + i;
7018 address_item *new = deliver_make_addr(r->address, FALSE);
7019 new->prop.errors_address = r->errors_to;
7021 if ((new->prop.utf8_msg = message_smtputf8))
7023 new->prop.utf8_downcvt = message_utf8_downconvert == 1;
7024 new->prop.utf8_downcvt_maybe = message_utf8_downconvert == -1;
7025 DEBUG(D_deliver) debug_printf("utf8, downconvert %s\n",
7026 new->prop.utf8_downcvt ? "yes"
7027 : new->prop.utf8_downcvt_maybe ? "ifneeded"
7033 new->onetime_parent = recipients_list[r->pno].address;
7035 /* If DSN support is enabled, set the dsn flags and the original receipt
7036 to be passed on to other DSN enabled MTAs */
7038 new->dsn_flags = r->dsn_flags & rf_dsnflags;
7039 new->dsn_orcpt = r->orcpt;
7040 DEBUG(D_deliver) debug_printf("DSN: set orcpt: %s flags: 0x%x\n",
7041 new->dsn_orcpt ? new->dsn_orcpt : US"", new->dsn_flags);
7043 switch (process_recipients)
7045 /* RECIP_DEFER is set when a system filter freezes a message. */
7048 new->next = addr_defer;
7053 /* RECIP_FAIL_FILTER is set when a system filter has obeyed a "fail"
7056 case RECIP_FAIL_FILTER:
7058 filter_message ? filter_message : US"delivery cancelled";
7059 setflag(new, af_pass_message);
7060 goto RECIP_QUEUE_FAILED; /* below */
7063 /* RECIP_FAIL_TIMEOUT is set when a message is frozen, but is older
7064 than the value in timeout_frozen_after. Treat non-bounce messages
7065 similarly to -Mg; for bounce messages we just want to discard, so
7066 don't put the address on the failed list. The timeout has already
7069 case RECIP_FAIL_TIMEOUT:
7070 new->message = US"delivery cancelled; message timed out";
7071 goto RECIP_QUEUE_FAILED; /* below */
7074 /* RECIP_FAIL is set when -Mg has been used. */
7077 new->message = US"delivery cancelled by administrator";
7080 /* Common code for the failure cases above. If this is not a bounce
7081 message, put the address on the failed list so that it is used to
7082 create a bounce. Otherwise do nothing - this just discards the address.
7083 The incident has already been logged. */
7086 if (sender_address[0])
7088 new->next = addr_failed;
7094 /* RECIP_FAIL_LOOP is set when there are too many Received: headers
7095 in the message. Process each address as a routing failure; if this
7096 is a bounce message, it will get frozen. */
7098 case RECIP_FAIL_LOOP:
7099 new->message = US"Too many \"Received\" headers - suspected mail loop";
7100 post_process_one(new, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
7104 /* Value should be RECIP_ACCEPT; take this as the safe default. */
7107 if (!addr_new) addr_new = new; else addr_last->next = new;
7112 #ifndef DISABLE_EVENT
7113 if (process_recipients != RECIP_ACCEPT && event_action)
7115 uschar * save_local = deliver_localpart;
7116 const uschar * save_domain = deliver_domain;
7117 uschar * addr = new->address, * errmsg = NULL;
7118 int start, end, dom;
7120 if (!parse_extract_address(addr, &errmsg, &start, &end, &dom, TRUE))
7121 log_write(0, LOG_MAIN|LOG_PANIC,
7122 "failed to parse address '%.100s': %s\n", addr, errmsg);
7126 string_copyn(addr+start, dom ? (dom-1) - start : end - start);
7127 deliver_domain = dom ? CUS string_copyn(addr+dom, end - dom) : CUS"";
7129 (void) event_raise(event_action, US"msg:fail:internal", new->message, NULL);
7131 deliver_localpart = save_local;
7132 deliver_domain = save_domain;
7140 debug_printf("Delivery address list:\n");
7141 for (address_item * p = addr_new; p; p = p->next)
7142 debug_printf(" %s %s\n", p->address,
7143 p->onetime_parent ? p->onetime_parent : US"");
7146 /* Set up the buffers used for copying over the file when delivering. */
7148 deliver_in_buffer = store_malloc(DELIVER_IN_BUFFER_SIZE);
7149 deliver_out_buffer = store_malloc(DELIVER_OUT_BUFFER_SIZE);
7153 /* Until there are no more new addresses, handle each one as follows:
7155 . If this is a generated address (indicated by the presence of a parent
7156 pointer) then check to see whether it is a pipe, file, or autoreply, and
7157 if so, handle it directly here. The router that produced the address will
7158 have set the allow flags into the address, and also set the uid/gid required.
7159 Having the routers generate new addresses and then checking them here at
7160 the outer level is tidier than making each router do the checking, and
7161 means that routers don't need access to the failed address queue.
7163 . Break up the address into local part and domain, and make lowercased
7164 versions of these strings. We also make unquoted versions of the local part.
7166 . Handle the percent hack for those domains for which it is valid.
7168 . For child addresses, determine if any of the parents have the same address.
7169 If so, generate a different string for previous delivery checking. Without
7170 this code, if the address spqr generates spqr via a forward or alias file,
7171 delivery of the generated spqr stops further attempts at the top level spqr,
7172 which is not what is wanted - it may have generated other addresses.
7174 . Check on the retry database to see if routing was previously deferred, but
7175 only if in a queue run. Addresses that are to be routed are put on the
7176 addr_route chain. Addresses that are to be deferred are put on the
7177 addr_defer chain. We do all the checking first, so as not to keep the
7178 retry database open any longer than necessary.
7180 . Now we run the addresses through the routers. A router may put the address
7181 on either the addr_local or the addr_remote chain for local or remote
7182 delivery, respectively, or put it on the addr_failed chain if it is
7183 undeliveable, or it may generate child addresses and put them on the
7184 addr_new chain, or it may defer an address. All the chain anchors are
7185 passed as arguments so that the routers can be called for verification
7188 . If new addresses have been generated by the routers, da capo.
7191 f.header_rewritten = FALSE; /* No headers rewritten yet */
7192 while (addr_new) /* Loop until all addresses dealt with */
7194 address_item * addr, * parent;
7196 /* Failure to open the retry database is treated the same as if it does
7197 not exist. In both cases, dbm_file is NULL. */
7199 if (!(dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE, TRUE)))
7200 DEBUG(D_deliver|D_retry|D_route|D_hints_lookup)
7201 debug_printf("no retry data available\n");
7203 /* Scan the current batch of new addresses, to handle pipes, files and
7204 autoreplies, and determine which others are ready for routing. */
7210 dbdata_retry * domain_retry_record, * address_retry_record;
7213 addr_new = addr->next;
7215 DEBUG(D_deliver|D_retry|D_route)
7217 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
7218 debug_printf("Considering: %s\n", addr->address);
7221 /* Handle generated address that is a pipe or a file or an autoreply. */
7223 if (testflag(addr, af_pfr))
7225 /* If an autoreply in a filter could not generate a syntactically valid
7226 address, give up forthwith. Set af_ignore_error so that we don't try to
7227 generate a bounce. */
7229 if (testflag(addr, af_bad_reply))
7231 addr->basic_errno = ERRNO_BADADDRESS2;
7232 addr->local_part = addr->address;
7234 US"filter autoreply generated syntactically invalid recipient";
7235 addr->prop.ignore_error = TRUE;
7236 (void) post_process_one(addr, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
7237 continue; /* with the next new address */
7240 /* If two different users specify delivery to the same pipe or file or
7241 autoreply, there should be two different deliveries, so build a unique
7242 string that incorporates the original address, and use this for
7243 duplicate testing and recording delivery, and also for retrying. */
7246 string_sprintf("%s:%s", addr->address, addr->parent->unique +
7247 (testflag(addr->parent, af_homonym)? 3:0));
7249 addr->address_retry_key = addr->domain_retry_key =
7250 string_sprintf("T:%s", addr->unique);
7252 /* If a filter file specifies two deliveries to the same pipe or file,
7253 we want to de-duplicate, but this is probably not wanted for two mail
7254 commands to the same address, where probably both should be delivered.
7255 So, we have to invent a different unique string in that case. Just
7256 keep piling '>' characters on the front. */
7258 if (addr->address[0] == '>')
7259 while (tree_search(tree_duplicates, addr->unique))
7260 addr->unique = string_sprintf(">%s", addr->unique);
7262 else if ((tnode = tree_search(tree_duplicates, addr->unique)))
7264 DEBUG(D_deliver|D_route)
7265 debug_printf("%s is a duplicate address: discarded\n", addr->address);
7266 addr->dupof = tnode->data.ptr;
7267 addr->next = addr_duplicate;
7268 addr_duplicate = addr;
7272 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
7274 /* Check for previous delivery */
7276 if (tree_search(tree_nonrecipients, addr->unique))
7278 DEBUG(D_deliver|D_route)
7279 debug_printf("%s was previously delivered: discarded\n", addr->address);
7280 child_done(addr, tod_stamp(tod_log));
7284 /* Save for checking future duplicates */
7286 tree_add_duplicate(addr->unique, addr);
7288 /* Set local part and domain */
7290 addr->local_part = addr->address;
7291 addr->domain = addr->parent->domain;
7293 /* Ensure that the delivery is permitted. */
7295 if (testflag(addr, af_file))
7297 if (!testflag(addr, af_allow_file))
7299 addr->basic_errno = ERRNO_FORBIDFILE;
7300 addr->message = US"delivery to file forbidden";
7301 (void)post_process_one(addr, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
7302 continue; /* with the next new address */
7305 else if (addr->address[0] == '|')
7307 if (!testflag(addr, af_allow_pipe))
7309 addr->basic_errno = ERRNO_FORBIDPIPE;
7310 addr->message = US"delivery to pipe forbidden";
7311 (void)post_process_one(addr, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
7312 continue; /* with the next new address */
7315 else if (!testflag(addr, af_allow_reply))
7317 addr->basic_errno = ERRNO_FORBIDREPLY;
7318 addr->message = US"autoreply forbidden";
7319 (void)post_process_one(addr, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
7320 continue; /* with the next new address */
7323 /* If the errno field is already set to BADTRANSPORT, it indicates
7324 failure to expand a transport string, or find the associated transport,
7325 or an unset transport when one is required. Leave this test till now so
7326 that the forbid errors are given in preference. */
7328 if (addr->basic_errno == ERRNO_BADTRANSPORT)
7330 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
7334 /* Treat /dev/null as a special case and abandon the delivery. This
7335 avoids having to specify a uid on the transport just for this case.
7336 Arrange for the transport name to be logged as "**bypassed**".
7337 Copy the transport for this fairly unusual case rather than having
7338 to make all transports mutable. */
7340 if (Ustrcmp(addr->address, "/dev/null") == 0)
7342 transport_instance * save_t = addr->transport;
7343 transport_instance * t = store_get(sizeof(*t), save_t);
7345 t->name = US"**bypassed**";
7346 addr->transport = t;
7347 (void)post_process_one(addr, OK, LOG_MAIN, EXIM_DTYPE_TRANSPORT, '=');
7348 addr->transport= save_t;
7349 continue; /* with the next new address */
7352 /* Pipe, file, or autoreply delivery is to go ahead as a normal local
7355 DEBUG(D_deliver|D_route)
7356 debug_printf("queued for %s transport\n", addr->transport->name);
7357 addr->next = addr_local;
7359 continue; /* with the next new address */
7362 /* Handle normal addresses. First, split up into local part and domain,
7363 handling the %-hack if necessary. There is the possibility of a defer from
7364 a lookup in percent_hack_domains. */
7366 if ((rc = deliver_split_address(addr)) == DEFER)
7368 addr->message = US"cannot check percent_hack_domains";
7369 addr->basic_errno = ERRNO_LISTDEFER;
7370 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_NONE, 0);
7374 /* Check to see if the domain is held. If so, proceed only if the
7375 delivery was forced by hand. */
7377 deliver_domain = addr->domain; /* set $domain */
7378 if ( !forced && hold_domains
7379 && (rc = match_isinlist(addr->domain, (const uschar **)&hold_domains, 0,
7380 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE,
7386 addr->message = US"hold_domains lookup deferred";
7387 addr->basic_errno = ERRNO_LISTDEFER;
7391 addr->message = US"domain is held";
7392 addr->basic_errno = ERRNO_HELD;
7394 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_NONE, 0);
7398 /* Now we can check for duplicates and previously delivered addresses. In
7399 order to do this, we have to generate a "unique" value for each address,
7400 because there may be identical actual addresses in a line of descendents.
7401 The "unique" field is initialized to the same value as the "address" field,
7402 but gets changed here to cope with identically-named descendents. */
7404 for (parent = addr->parent; parent; parent = parent->parent)
7405 if (strcmpic(addr->address, parent->address) == 0) break;
7407 /* If there's an ancestor with the same name, set the homonym flag. This
7408 influences how deliveries are recorded. Then add a prefix on the front of
7409 the unique address. We use \n\ where n starts at 0 and increases each time.
7410 It is unlikely to pass 9, but if it does, it may look odd but will still
7411 work. This means that siblings or cousins with the same names are treated
7412 as duplicates, which is what we want. */
7416 setflag(addr, af_homonym);
7417 if (parent->unique[0] != '\\')
7418 addr->unique = string_sprintf("\\0\\%s", addr->address);
7420 addr->unique = string_sprintf("\\%c\\%s", parent->unique[1] + 1,
7424 /* Ensure that the domain in the unique field is lower cased, because
7425 domains are always handled caselessly. */
7427 for (uschar * p = Ustrrchr(addr->unique, '@'); *p; p++) *p = tolower(*p);
7429 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
7431 if (tree_search(tree_nonrecipients, addr->unique))
7433 DEBUG(D_deliver|D_route)
7434 debug_printf("%s was previously delivered: discarded\n", addr->unique);
7435 child_done(addr, tod_stamp(tod_log));
7439 /* Get the routing retry status, saving the two retry keys (with and
7440 without the local part) for subsequent use. If there is no retry record for
7441 the standard address routing retry key, we look for the same key with the
7442 sender attached, because this form is used by the smtp transport after a
7443 4xx response to RCPT when address_retry_include_sender is true. */
7445 addr->domain_retry_key = string_sprintf("R:%s", addr->domain);
7446 addr->address_retry_key = string_sprintf("R:%s@%s", addr->local_part,
7451 domain_retry_record = dbfn_read(dbm_file, addr->domain_retry_key);
7452 if ( domain_retry_record
7453 && now - domain_retry_record->time_stamp > retry_data_expire
7456 DEBUG(D_deliver|D_retry)
7457 debug_printf("domain retry record present but expired\n");
7458 domain_retry_record = NULL; /* Ignore if too old */
7461 address_retry_record = dbfn_read(dbm_file, addr->address_retry_key);
7462 if ( address_retry_record
7463 && now - address_retry_record->time_stamp > retry_data_expire
7466 DEBUG(D_deliver|D_retry)
7467 debug_printf("address retry record present but expired\n");
7468 address_retry_record = NULL; /* Ignore if too old */
7471 if (!address_retry_record)
7473 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
7475 address_retry_record = dbfn_read(dbm_file, altkey);
7476 if ( address_retry_record
7477 && now - address_retry_record->time_stamp > retry_data_expire)
7479 DEBUG(D_deliver|D_retry)
7480 debug_printf("address<sender> retry record present but expired\n");
7481 address_retry_record = NULL; /* Ignore if too old */
7486 domain_retry_record = address_retry_record = NULL;
7488 DEBUG(D_deliver|D_retry)
7490 if (!domain_retry_record)
7491 debug_printf("no domain retry record\n");
7493 debug_printf("have domain retry record; next_try = now%+d\n",
7494 f.running_in_test_harness ? 0 :
7495 (int)(domain_retry_record->next_try - now));
7497 if (!address_retry_record)
7498 debug_printf("no address retry record\n");
7500 debug_printf("have address retry record; next_try = now%+d\n",
7501 f.running_in_test_harness ? 0 :
7502 (int)(address_retry_record->next_try - now));
7505 /* If we are sending a message down an existing SMTP connection, we must
7506 assume that the message which created the connection managed to route
7507 an address to that connection. We do not want to run the risk of taking
7508 a long time over routing here, because if we do, the server at the other
7509 end of the connection may time it out. This is especially true for messages
7510 with lots of addresses. For this kind of delivery, queue_running is not
7511 set, so we would normally route all addresses. We take a pragmatic approach
7512 and defer routing any addresses that have any kind of domain retry record.
7513 That is, we don't even look at their retry times. It doesn't matter if this
7514 doesn't work occasionally. This is all just an optimization, after all.
7516 The reason for not doing the same for address retries is that they normally
7517 arise from 4xx responses, not DNS timeouts. */
7519 if (continue_hostname && domain_retry_record)
7521 addr->message = US"reusing SMTP connection skips previous routing defer";
7522 addr->basic_errno = ERRNO_RRETRY;
7523 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
7525 addr->message = domain_retry_record->text;
7526 setflag(addr, af_pass_message);
7529 /* If we are in a queue run, defer routing unless there is no retry data or
7530 we've passed the next retry time, or this message is forced. In other
7531 words, ignore retry data when not in a queue run.
7533 However, if the domain retry time has expired, always allow the routing
7534 attempt. If it fails again, the address will be failed. This ensures that
7535 each address is routed at least once, even after long-term routing
7538 If there is an address retry, check that too; just wait for the next
7539 retry time. This helps with the case when the temporary error on the
7540 address was really message-specific rather than address specific, since
7541 it allows other messages through.
7543 We also wait for the next retry time if this is a message sent down an
7544 existing SMTP connection (even though that will be forced). Otherwise there
7545 will be far too many attempts for an address that gets a 4xx error. In
7546 fact, after such an error, we should not get here because, the host should
7547 not be remembered as one this message needs. However, there was a bug that
7548 used to cause this to happen, so it is best to be on the safe side.
7550 Even if we haven't reached the retry time in the hints, there is one more
7551 check to do, which is for the ultimate address timeout. We only do this
7552 check if there is an address retry record and there is not a domain retry
7553 record; this implies that previous attempts to handle the address had the
7554 retry_use_local_parts option turned on. We use this as an approximation
7555 for the destination being like a local delivery, for example delivery over
7556 LMTP to an IMAP message store. In this situation users are liable to bump
7557 into their quota and thereby have intermittently successful deliveries,
7558 which keep the retry record fresh, which can lead to us perpetually
7559 deferring messages. */
7561 else if ( ( f.queue_running && !f.deliver_force
7562 || continue_hostname
7564 && ( ( domain_retry_record
7565 && now < domain_retry_record->next_try
7566 && !domain_retry_record->expired
7568 || ( address_retry_record
7569 && now < address_retry_record->next_try
7571 && ( domain_retry_record
7572 || !address_retry_record
7573 || !retry_ultimate_address_timeout(addr->address_retry_key,
7574 addr->domain, address_retry_record, now)
7577 addr->message = US"retry time not reached";
7578 addr->basic_errno = ERRNO_RRETRY;
7579 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
7581 /* For remote-retry errors (here and just above) that we've not yet
7582 hit the retry time, use the error recorded in the retry database
7583 as info in the warning message. This lets us send a message even
7584 when we're not failing on a fresh attempt. We assume that this
7585 info is not sensitive. */
7587 addr->message = domain_retry_record
7588 ? domain_retry_record->text : address_retry_record->text;
7589 setflag(addr, af_pass_message);
7592 /* The domain is OK for routing. Remember if retry data exists so it
7593 can be cleaned up after a successful delivery. */
7597 if (domain_retry_record || address_retry_record)
7598 setflag(addr, af_dr_retry_exists);
7599 addr->next = addr_route;
7601 DEBUG(D_deliver|D_route)
7602 debug_printf("%s: queued for routing\n", addr->address);
7606 /* The database is closed while routing is actually happening. Requests to
7607 update it are put on a chain and all processed together at the end. */
7609 if (dbm_file) dbfn_close(dbm_file);
7611 /* If queue_domains is set, we don't even want to try routing addresses in
7612 those domains. During queue runs, queue_domains is forced to be unset.
7613 Optimize by skipping this pass through the addresses if nothing is set. */
7615 if (!f.deliver_force && queue_domains)
7617 address_item *okaddr = NULL;
7620 address_item *addr = addr_route;
7621 addr_route = addr->next;
7623 deliver_domain = addr->domain; /* set $domain */
7624 if ((rc = match_isinlist(addr->domain, CUSS &queue_domains, 0,
7625 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
7629 addr->basic_errno = ERRNO_LISTDEFER;
7630 addr->message = US"queue_domains lookup deferred";
7631 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
7635 addr->next = okaddr;
7640 addr->basic_errno = ERRNO_QUEUE_DOMAIN;
7641 addr->message = US"domain is in queue_domains";
7642 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
7646 addr_route = okaddr;
7649 /* Now route those addresses that are not deferred. */
7654 address_item *addr = addr_route;
7655 const uschar *old_domain = addr->domain;
7656 uschar *old_unique = addr->unique;
7657 addr_route = addr->next;
7660 /* Just in case some router parameter refers to it. */
7662 if (!(return_path = addr->prop.errors_address))
7663 return_path = sender_address;
7665 /* If a router defers an address, add a retry item. Whether or not to
7666 use the local part in the key is a property of the router. */
7668 if ((rc = route_address(addr, &addr_local, &addr_remote, &addr_new,
7669 &addr_succeed, v_none)) == DEFER)
7670 retry_add_item(addr,
7671 addr->router->retry_use_local_part
7672 ? string_sprintf("R:%s@%s", addr->local_part, addr->domain)
7673 : string_sprintf("R:%s", addr->domain),
7676 /* Otherwise, if there is an existing retry record in the database, add
7677 retry items to delete both forms. We must also allow for the possibility
7678 of a routing retry that includes the sender address. Since the domain might
7679 have been rewritten (expanded to fully qualified) as a result of routing,
7680 ensure that the rewritten form is also deleted. */
7682 else if (testflag(addr, af_dr_retry_exists))
7684 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
7686 retry_add_item(addr, altkey, rf_delete);
7687 retry_add_item(addr, addr->address_retry_key, rf_delete);
7688 retry_add_item(addr, addr->domain_retry_key, rf_delete);
7689 if (Ustrcmp(addr->domain, old_domain) != 0)
7690 retry_add_item(addr, string_sprintf("R:%s", old_domain), rf_delete);
7693 /* DISCARD is given for :blackhole: and "seen finish". The event has been
7694 logged, but we need to ensure the address (and maybe parents) is marked
7699 address_done(addr, tod_stamp(tod_log));
7700 continue; /* route next address */
7703 /* The address is finished with (failed or deferred). */
7707 (void)post_process_one(addr, rc, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
7708 continue; /* route next address */
7711 /* The address has been routed. If the router changed the domain, it will
7712 also have changed the unique address. We have to test whether this address
7713 has already been delivered, because it's the unique address that finally
7716 if ( addr->unique != old_unique
7717 && tree_search(tree_nonrecipients, addr->unique) != 0
7720 DEBUG(D_deliver|D_route) debug_printf("%s was previously delivered: "
7721 "discarded\n", addr->address);
7722 if (addr_remote == addr) addr_remote = addr->next;
7723 else if (addr_local == addr) addr_local = addr->next;
7726 /* If the router has same_domain_copy_routing set, we are permitted to copy
7727 the routing for any other addresses with the same domain. This is an
7728 optimisation to save repeated DNS lookups for "standard" remote domain
7729 routing. The option is settable only on routers that generate host lists.
7730 We play it very safe, and do the optimization only if the address is routed
7731 to a remote transport, there are no header changes, and the domain was not
7732 modified by the router. */
7734 if ( addr_remote == addr
7735 && addr->router->same_domain_copy_routing
7736 && !addr->prop.extra_headers
7737 && !addr->prop.remove_headers
7738 && old_domain == addr->domain
7741 address_item **chain = &addr_route;
7744 address_item *addr2 = *chain;
7745 if (Ustrcmp(addr2->domain, addr->domain) != 0)
7747 chain = &(addr2->next);
7751 /* Found a suitable address; take it off the routing list and add it to
7752 the remote delivery list. */
7754 *chain = addr2->next;
7755 addr2->next = addr_remote;
7756 addr_remote = addr2;
7758 /* Copy the routing data */
7760 addr2->domain = addr->domain;
7761 addr2->router = addr->router;
7762 addr2->transport = addr->transport;
7763 addr2->host_list = addr->host_list;
7764 addr2->fallback_hosts = addr->fallback_hosts;
7765 addr2->prop.errors_address = addr->prop.errors_address;
7766 copyflag(addr2, addr, af_hide_child);
7767 copyflag(addr2, addr, af_local_host_removed);
7769 DEBUG(D_deliver|D_route)
7770 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"
7772 "Routing for %s copied from %s\n",
7773 addr2->address, addr2->address, addr->address);
7776 } /* Continue with routing the next address. */
7777 } /* Loop to process any child addresses that the routers created, and
7778 any rerouted addresses that got put back on the new chain. */
7781 /* Debugging: show the results of the routing */
7783 DEBUG(D_deliver|D_retry|D_route)
7785 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
7786 debug_printf("After routing:\n Local deliveries:\n");
7787 for (address_item * p = addr_local; p; p = p->next)
7788 debug_printf(" %s\n", p->address);
7790 debug_printf(" Remote deliveries:\n");
7791 for (address_item * p = addr_remote; p; p = p->next)
7792 debug_printf(" %s\n", p->address);
7794 debug_printf(" Failed addresses:\n");
7795 for (address_item * p = addr_failed; p; p = p->next)
7796 debug_printf(" %s\n", p->address);
7798 debug_printf(" Deferred addresses:\n");
7799 for (address_item * p = addr_defer; p; p = p->next)
7800 debug_printf(" %s\n", p->address);
7803 /* Free any resources that were cached during routing. */
7808 /* These two variables are set only during routing, after check_local_user.
7809 Ensure they are not set in transports. */
7811 local_user_gid = (gid_t)(-1);
7812 local_user_uid = (uid_t)(-1);
7814 /* Check for any duplicate addresses. This check is delayed until after
7815 routing, because the flexibility of the routing configuration means that
7816 identical addresses with different parentage may end up being redirected to
7817 different addresses. Checking for duplicates too early (as we previously used
7818 to) makes this kind of thing not work. */
7820 do_duplicate_check(&addr_local);
7821 do_duplicate_check(&addr_remote);
7823 /* When acting as an MUA wrapper, we proceed only if all addresses route to a
7824 remote transport. The check that they all end up in one transaction happens in
7825 the do_remote_deliveries() function. */
7828 && (addr_local || addr_failed || addr_defer)
7832 uschar *which, *colon, *msg;
7839 else if (addr_defer)
7842 which = US"deferred";
7850 while (addr->parent) addr = addr->parent;
7855 msg = addr->message;
7857 else colon = msg = US"";
7859 /* We don't need to log here for a forced failure as it will already
7860 have been logged. Defer will also have been logged, but as a defer, so we do
7861 need to do the failure logging. */
7863 if (addr != addr_failed)
7864 log_write(0, LOG_MAIN, "** %s routing yielded a %s delivery",
7865 addr->address, which);
7867 /* Always write an error to the caller */
7869 fprintf(stderr, "routing %s yielded a %s delivery%s%s\n", addr->address,
7872 final_yield = DELIVER_MUA_FAILED;
7873 addr_failed = addr_defer = NULL; /* So that we remove the message */
7874 goto DELIVERY_TIDYUP;
7878 /* If this is a run to continue deliveries to an external channel that is
7879 already set up, defer any local deliveries.
7881 jgh 2020/12/20: I don't see why; locals should be quick.
7882 The defer goes back to version 1.62 in 1997. A local being still deliverable
7883 during a continued run might result from something like a defer during the
7884 original delivery, eg. in a DB lookup. Unlikely but possible.
7886 To avoid delaying a local when combined with a callout-hold for a remote
7887 delivery, test continue_sequence rather than continue_transport. */
7889 if (continue_sequence > 1 && addr_local)
7891 DEBUG(D_deliver|D_retry|D_route)
7892 debug_printf("deferring local deliveries due to continued-transport\n");
7895 address_item * addr = addr_defer;
7896 while (addr->next) addr = addr->next;
7897 addr->next = addr_local;
7900 addr_defer = addr_local;
7905 /* Because address rewriting can happen in the routers, we should not really do
7906 ANY deliveries until all addresses have been routed, so that all recipients of
7907 the message get the same headers. However, this is in practice not always
7908 possible, since sometimes remote addresses give DNS timeouts for days on end.
7909 The pragmatic approach is to deliver what we can now, saving any rewritten
7910 headers so that at least the next lot of recipients benefit from the rewriting
7911 that has already been done.
7913 If any headers have been rewritten during routing, update the spool file to
7914 remember them for all subsequent deliveries. This can be delayed till later if
7915 there is only address to be delivered - if it succeeds the spool write need not
7918 if ( f.header_rewritten
7919 && ( addr_local && (addr_local->next || addr_remote)
7920 || addr_remote && addr_remote->next
7923 /* Panic-dies on error */
7924 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7925 f.header_rewritten = FALSE;
7929 /* If there are any deliveries to do and we do not already have the journal
7930 file, create it. This is used to record successful deliveries as soon as
7931 possible after each delivery is known to be complete. A file opened with
7932 O_APPEND is used so that several processes can run simultaneously.
7934 The journal is just insurance against crashes. When the spool file is
7935 ultimately updated at the end of processing, the journal is deleted. If a
7936 journal is found to exist at the start of delivery, the addresses listed
7937 therein are added to the non-recipients. */
7939 if (addr_local || addr_remote)
7943 uschar * fname = spool_fname(US"input", message_subdir, id, US"-J");
7945 if ((journal_fd = Uopen(fname,
7946 EXIM_CLOEXEC | O_WRONLY|O_APPEND|O_CREAT|O_EXCL, SPOOL_MODE)) < 0)
7948 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't open journal file %s: %s",
7949 fname, strerror(errno));
7950 return DELIVER_NOT_ATTEMPTED;
7953 /* Set the close-on-exec flag, make the file owned by Exim, and ensure
7954 that the mode is correct - the group setting doesn't always seem to get
7955 set automatically. */
7957 if( exim_fchown(journal_fd, exim_uid, exim_gid, fname)
7958 || fchmod(journal_fd, SPOOL_MODE)
7960 || fcntl(journal_fd, F_SETFD, fcntl(journal_fd, F_GETFD) | FD_CLOEXEC)
7964 int ret = Uunlink(fname);
7965 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't set perms on journal file %s: %s",
7966 fname, strerror(errno));
7967 if(ret && errno != ENOENT)
7968 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7969 fname, strerror(errno));
7970 return DELIVER_NOT_ATTEMPTED;
7974 else if (journal_fd >= 0)
7982 /* Now we can get down to the business of actually doing deliveries. Local
7983 deliveries are done first, then remote ones. If ever the problems of how to
7984 handle fallback transports are figured out, this section can be put into a loop
7985 for handling fallbacks, though the uid switching will have to be revised. */
7987 /* Precompile a regex that is used to recognize a parameter in response
7988 to an LHLO command, if is isn't already compiled. This may be used on both
7989 local and remote LMTP deliveries. */
7991 if (!regex_IGNOREQUOTA)
7993 regex_must_compile(US"\\n250[\\s\\-]IGNOREQUOTA(\\s|\\n|$)", MCS_NOFLAGS, TRUE);
7995 /* Handle local deliveries */
7999 DEBUG(D_deliver|D_transport)
8000 debug_printf(">>>>>>>>>>>>>>>> Local deliveries >>>>>>>>>>>>>>>>\n");
8001 do_local_deliveries();
8002 f.disable_logging = FALSE;
8005 /* If queue_run_local is set, we do not want to attempt any remote deliveries,
8006 so just queue them all. */
8008 if (f.queue_run_local)
8011 address_item *addr = addr_remote;
8012 addr_remote = addr->next;
8014 addr->basic_errno = ERRNO_LOCAL_ONLY;
8015 addr->message = US"remote deliveries suppressed";
8016 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_TRANSPORT, 0);
8019 /* Handle remote deliveries */
8023 DEBUG(D_deliver|D_transport)
8024 debug_printf(">>>>>>>>>>>>>>>> Remote deliveries >>>>>>>>>>>>>>>>\n");
8026 /* Precompile some regex that are used to recognize parameters in response
8027 to an EHLO command, if they aren't already compiled. */
8029 smtp_deliver_init();
8031 /* Now sort the addresses if required, and do the deliveries. The yield of
8032 do_remote_deliveries is FALSE when mua_wrapper is set and all addresses
8033 cannot be delivered in one transaction. */
8035 if (remote_sort_domains) sort_remote_deliveries();
8036 if (!do_remote_deliveries(FALSE))
8038 log_write(0, LOG_MAIN, "** mua_wrapper is set but recipients cannot all "
8039 "be delivered in one transaction");
8040 fprintf(stderr, "delivery to smarthost failed (configuration problem)\n");
8042 final_yield = DELIVER_MUA_FAILED;
8043 addr_failed = addr_defer = NULL; /* So that we remove the message */
8044 goto DELIVERY_TIDYUP;
8047 /* See if any of the addresses that failed got put on the queue for delivery
8048 to their fallback hosts. We do it this way because often the same fallback
8049 host is used for many domains, so all can be sent in a single transaction
8050 (if appropriately configured). */
8052 if (addr_fallback && !mua_wrapper)
8054 DEBUG(D_deliver) debug_printf("Delivering to fallback hosts\n");
8055 addr_remote = addr_fallback;
8056 addr_fallback = NULL;
8057 if (remote_sort_domains) sort_remote_deliveries();
8058 do_remote_deliveries(TRUE);
8060 f.disable_logging = FALSE;
8064 /* All deliveries are now complete. Ignore SIGTERM during this tidying up
8065 phase, to minimize cases of half-done things. */
8068 debug_printf(">>>>>>>>>>>>>>>> deliveries are done >>>>>>>>>>>>>>>>\n");
8069 cancel_cutthrough_connection(TRUE, US"deliveries are done");
8071 /* Root privilege is no longer needed */
8073 exim_setugid(exim_uid, exim_gid, FALSE, US"post-delivery tidying");
8075 set_process_info("tidying up after delivering %s", message_id);
8076 signal(SIGTERM, SIG_IGN);
8078 /* When we are acting as an MUA wrapper, the smtp transport will either have
8079 succeeded for all addresses, or failed them all in normal cases. However, there
8080 are some setup situations (e.g. when a named port does not exist) that cause an
8081 immediate exit with deferral of all addresses. Convert those into failures. We
8082 do not ever want to retry, nor do we want to send a bounce message. */
8088 address_item * nextaddr;
8089 for (address_item * addr = addr_defer; addr; addr = nextaddr)
8091 log_write(0, LOG_MAIN, "** %s mua_wrapper forced failure for deferred "
8092 "delivery", addr->address);
8093 nextaddr = addr->next;
8094 addr->next = addr_failed;
8100 /* Now all should either have succeeded or failed. */
8103 final_yield = DELIVER_MUA_SUCCEEDED;
8107 uschar *s = addr_failed->user_message;
8109 if (!s) s = addr_failed->message;
8111 fprintf(stderr, "Delivery failed: ");
8112 if (addr_failed->basic_errno > 0)
8114 fprintf(stderr, "%s", strerror(addr_failed->basic_errno));
8115 if (s) fprintf(stderr, ": ");
8117 if ((host = addr_failed->host_used))
8118 fprintf(stderr, "H=%s [%s]: ", host->name, host->address);
8120 fprintf(stderr, "%s", CS s);
8121 else if (addr_failed->basic_errno <= 0)
8122 fprintf(stderr, "unknown error");
8123 fprintf(stderr, "\n");
8125 final_yield = DELIVER_MUA_FAILED;
8130 /* In a normal configuration, we now update the retry database. This is done in
8131 one fell swoop at the end in order not to keep opening and closing (and
8132 locking) the database. The code for handling retries is hived off into a
8133 separate module for convenience. We pass it the addresses of the various
8134 chains, because deferred addresses can get moved onto the failed chain if the
8135 retry cutoff time has expired for all alternative destinations. Bypass the
8136 updating of the database if the -N flag is set, which is a debugging thing that
8137 prevents actual delivery. */
8139 else if (!f.dont_deliver)
8140 retry_update(&addr_defer, &addr_failed, &addr_succeed);
8142 /* Send DSN for successful messages if requested */
8146 /* If any addresses failed, we must send a message to somebody, unless
8147 af_ignore_error is set, in which case no action is taken. It is possible for
8148 several messages to get sent if there are addresses with different
8153 const uschar * logtod = tod_stamp(tod_log);
8154 address_item * addr;
8156 /* There are weird cases when logging is disabled in the transport. However,
8157 there may not be a transport (address failed by a router). */
8159 f.disable_logging = FALSE;
8160 if (addr_failed->transport)
8161 f.disable_logging = addr_failed->transport->disable_logging;
8164 debug_printf("processing failed address %s\n", addr_failed->address);
8166 /* There are only two ways an address in a bounce message can get here:
8168 (1) When delivery was initially deferred, but has now timed out (in the call
8169 to retry_update() above). We can detect this by testing for
8170 af_retry_timedout. If the address does not have its own errors address,
8171 we arrange to ignore the error.
8173 (2) If delivery failures for bounce messages are being ignored. We can detect
8174 this by testing for af_ignore_error. This will also be set if a bounce
8175 message has been autothawed and the ignore_bounce_errors_after time has
8176 passed. It might also be set if a router was explicitly configured to
8177 ignore errors (errors_to = "").
8179 If neither of these cases obtains, something has gone wrong. Log the
8180 incident, but then ignore the error. */
8182 if (sender_address[0] == 0 && !addr_failed->prop.errors_address)
8184 if ( !testflag(addr_failed, af_retry_timedout)
8185 && !addr_failed->prop.ignore_error)
8186 log_write(0, LOG_MAIN|LOG_PANIC, "internal error: bounce message "
8187 "failure is neither frozen nor ignored (it's been ignored)");
8189 addr_failed->prop.ignore_error = TRUE;
8192 /* If the first address on the list has af_ignore_error set, just remove
8193 it from the list, throw away any saved message file, log it, and
8194 mark the recipient done. */
8196 if ( addr_failed->prop.ignore_error
8197 || addr_failed->dsn_flags & rf_dsnflags
8198 && !(addr_failed->dsn_flags & rf_notify_failure)
8202 addr_failed = addr->next;
8203 if (addr->return_filename) Uunlink(addr->return_filename);
8205 #ifndef DISABLE_EVENT
8206 msg_event_raise(US"msg:fail:delivery", addr);
8208 log_write(0, LOG_MAIN, "%s%s%s%s: error ignored%s",
8210 !addr->parent ? US"" : US" <",
8211 !addr->parent ? US"" : addr->parent->address,
8212 !addr->parent ? US"" : US">",
8213 addr->prop.ignore_error
8214 ? US"" : US": RFC 3461 DSN, failure notify not requested");
8216 address_done(addr, logtod);
8217 child_done(addr, logtod);
8218 /* Panic-dies on error */
8219 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
8222 /* Otherwise, handle the sending of a message. Find the error address for
8223 the first address, then send a message that includes all failed addresses
8224 that have the same error address. */
8227 send_bounce_message(now, logtod);
8230 f.disable_logging = FALSE; /* In case left set */
8232 /* Come here from the mua_wrapper case if routing goes wrong */
8236 /* If there are now no deferred addresses, we are done. Preserve the
8237 message log if so configured, and we are using them. Otherwise, sling it.
8238 Then delete the message itself. */
8246 fname = spool_fname(US"msglog", message_subdir, id, US"");
8247 if (preserve_message_logs)
8250 uschar * moname = spool_fname(US"msglog.OLD", US"", id, US"");
8252 if ((rc = Urename(fname, moname)) < 0)
8254 (void)directory_make(spool_directory,
8255 spool_sname(US"msglog.OLD", US""),
8256 MSGLOG_DIRECTORY_MODE, TRUE);
8257 rc = Urename(fname, moname);
8260 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to move %s to the "
8261 "msglog.OLD directory", fname);
8264 if (Uunlink(fname) < 0)
8265 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
8266 fname, strerror(errno));
8269 /* Remove the two message files. */
8271 fname = spool_fname(US"input", message_subdir, id, US"-D");
8272 if (Uunlink(fname) < 0)
8273 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
8274 fname, strerror(errno));
8275 fname = spool_fname(US"input", message_subdir, id, US"-H");
8276 if (Uunlink(fname) < 0)
8277 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
8278 fname, strerror(errno));
8280 /* Log the end of this message, with queue time if requested. */
8282 if (LOGGING(queue_time_overall))
8283 log_write(0, LOG_MAIN, "Completed QT=%s", string_timesince(&received_time));
8285 log_write(0, LOG_MAIN, "Completed");
8287 /* Unset deliver_freeze so that we won't try to move the spool files further down */
8288 f.deliver_freeze = FALSE;
8290 #ifndef DISABLE_EVENT
8291 (void) event_raise(event_action, US"msg:complete", NULL, NULL);
8295 /* If there are deferred addresses, we are keeping this message because it is
8296 not yet completed. Lose any temporary files that were catching output from
8297 pipes for any of the deferred addresses, handle one-time aliases, and see if
8298 the message has been on the queue for so long that it is time to send a warning
8299 message to the sender, unless it is a mailer-daemon. If all deferred addresses
8300 have the same domain, we can set deliver_domain for the expansion of
8301 delay_warning_ condition - if any of them are pipes, files, or autoreplies, use
8302 the parent's domain.
8304 If all the deferred addresses have an error number that indicates "retry time
8305 not reached", skip sending the warning message, because it won't contain the
8306 reason for the delay. It will get sent at the next real delivery attempt.
8307 Exception: for retries caused by a remote peer we use the error message
8308 store in the retry DB as the reason.
8309 However, if at least one address has tried, we'd better include all of them in
8312 If we can't make a process to send the message, don't worry.
8314 For mailing list expansions we want to send the warning message to the
8315 mailing list manager. We can't do a perfect job here, as some addresses may
8316 have different errors addresses, but if we take the errors address from
8317 each deferred address it will probably be right in most cases.
8319 If addr_defer == +1, it means there was a problem sending an error message
8320 for failed addresses, and there were no "real" deferred addresses. The value
8321 was set just to keep the message on the spool, so there is nothing to do here.
8324 else if (addr_defer != (address_item *)(+1))
8326 uschar * recipients = US"";
8327 BOOL want_warning_msg = FALSE;
8329 deliver_domain = testflag(addr_defer, af_pfr)
8330 ? addr_defer->parent->domain : addr_defer->domain;
8332 for (address_item * addr = addr_defer; addr; addr = addr->next)
8334 address_item * otaddr;
8336 if (addr->basic_errno > ERRNO_WARN_BASE) want_warning_msg = TRUE;
8340 const uschar *d = testflag(addr, af_pfr)
8341 ? addr->parent->domain : addr->domain;
8343 /* The domain may be unset for an address that has never been routed
8344 because the system filter froze the message. */
8346 if (!d || Ustrcmp(d, deliver_domain) != 0)
8347 deliver_domain = NULL;
8350 if (addr->return_filename) Uunlink(addr->return_filename);
8352 /* Handle the case of one-time aliases. If any address in the ancestry
8353 of this one is flagged, ensure it is in the recipients list, suitably
8354 flagged, and that its parent is marked delivered. */
8356 for (otaddr = addr; otaddr; otaddr = otaddr->parent)
8357 if (otaddr->onetime_parent) break;
8362 int t = recipients_count;
8364 for (i = 0; i < recipients_count; i++)
8366 uschar *r = recipients_list[i].address;
8367 if (Ustrcmp(otaddr->onetime_parent, r) == 0) t = i;
8368 if (Ustrcmp(otaddr->address, r) == 0) break;
8371 /* Didn't find the address already in the list, and did find the
8372 ultimate parent's address in the list, and they really are different
8373 (i.e. not from an identity-redirect). After adding the recipient,
8374 update the errors address in the recipients list. */
8376 if ( i >= recipients_count && t < recipients_count
8377 && Ustrcmp(otaddr->address, otaddr->parent->address) != 0)
8379 DEBUG(D_deliver) debug_printf("one_time: adding %s in place of %s\n",
8380 otaddr->address, otaddr->parent->address);
8381 receive_add_recipient(otaddr->address, t);
8382 recipients_list[recipients_count-1].errors_to = otaddr->prop.errors_address;
8383 tree_add_nonrecipient(otaddr->parent->address);
8384 update_spool = TRUE;
8388 /* Except for error messages, ensure that either the errors address for
8389 this deferred address or, if there is none, the sender address, is on the
8390 list of recipients for a warning message. */
8392 if (sender_address[0])
8394 uschar * s = addr->prop.errors_address;
8395 if (!s) s = sender_address;
8396 if (Ustrstr(recipients, s) == NULL)
8397 recipients = string_sprintf("%s%s%s", recipients,
8398 recipients[0] ? "," : "", s);
8402 /* Send a warning message if the conditions are right. If the condition check
8403 fails because of a lookup defer, there is nothing we can do. The warning
8404 is not sent. Another attempt will be made at the next delivery attempt (if
8407 if ( !f.queue_2stage
8409 && ( !(addr_defer->dsn_flags & rf_dsnflags)
8410 || addr_defer->dsn_flags & rf_notify_delay
8412 && delay_warning[1] > 0
8413 && sender_address[0] != 0
8414 && ( !delay_warning_condition
8415 || expand_check_condition(delay_warning_condition,
8416 US"delay_warning", US"option")
8422 int queue_time = time(NULL) - received_time.tv_sec;
8424 queue_time = test_harness_fudged_queue_time(queue_time);
8426 /* See how many warnings we should have sent by now */
8428 for (count = 0; count < delay_warning[1]; count++)
8429 if (queue_time < delay_warning[count+2]) break;
8431 show_time = delay_warning[count+1];
8433 if (count >= delay_warning[1])
8436 int last_gap = show_time;
8437 if (count > 1) last_gap -= delay_warning[count];
8438 extra = (queue_time - delay_warning[count+1])/last_gap;
8439 show_time += last_gap * extra;
8445 debug_printf("time on queue = %s id %s addr %s\n",
8446 readconf_printtime(queue_time), message_id, addr_defer->address);
8447 debug_printf("warning counts: required %d done %d\n", count,
8451 /* We have computed the number of warnings there should have been by now.
8452 If there haven't been enough, send one, and up the count to what it should
8455 if (warning_count < count)
8456 if (send_warning_message(recipients, queue_time, show_time))
8458 warning_count = count;
8459 update_spool = TRUE; /* Ensure spool rewritten */
8463 /* Clear deliver_domain */
8465 deliver_domain = NULL;
8467 /* If this was a first delivery attempt, unset the first time flag, and
8468 ensure that the spool gets updated. */
8470 if (f.deliver_firsttime && !f.queue_2stage)
8472 f.deliver_firsttime = FALSE;
8473 update_spool = TRUE;
8476 /* If delivery was frozen and freeze_tell is set, generate an appropriate
8477 message, unless the message is a local error message (to avoid loops). Then
8478 log the freezing. If the text in "frozen_info" came from a system filter,
8479 it has been escaped into printing characters so as not to mess up log lines.
8480 For the "tell" message, we turn \n back into newline. Also, insert a newline
8481 near the start instead of the ": " string. */
8483 if (f.deliver_freeze)
8485 if (freeze_tell && *freeze_tell && !f.local_error_message)
8487 uschar * s = string_copy(frozen_info);
8488 uschar * ss = Ustrstr(s, " by the system filter: ");
8497 if (*ss == '\\' && ss[1] == 'n')
8498 { *ss++ = ' '; *ss++ = '\n'; }
8502 moan_tell_someone(freeze_tell, addr_defer, US"Message frozen",
8503 "Message %s has been frozen%s.\nThe sender is <%s>.\n", message_id,
8507 /* Log freezing just before we update the -H file, to minimize the chance
8508 of a race problem. */
8510 deliver_msglog("*** Frozen%s\n", frozen_info);
8511 log_write(0, LOG_MAIN, "Frozen%s", frozen_info);
8514 /* If there have been any updates to the non-recipients list, or other things
8515 that get written to the spool, we must now update the spool header file so
8516 that it has the right information for the next delivery attempt. If there
8517 was more than one address being delivered, the header_change update is done
8518 earlier, in case one succeeds and then something crashes. */
8521 debug_printf("delivery deferred: update_spool=%d header_rewritten=%d\n",
8522 update_spool, f.header_rewritten);
8524 if (update_spool || f.header_rewritten)
8525 /* Panic-dies on error */
8526 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
8529 /* Finished with the message log. If the message is complete, it will have
8530 been unlinked or renamed above. */
8532 if (message_logs) (void)fclose(message_log);
8534 /* Now we can close and remove the journal file. Its only purpose is to record
8535 successfully completed deliveries asap so that this information doesn't get
8536 lost if Exim (or the machine) crashes. Forgetting about a failed delivery is
8537 not serious, as trying it again is not harmful. The journal might not be open
8538 if all addresses were deferred at routing or directing. Nevertheless, we must
8539 remove it if it exists (may have been lying around from a crash during the
8540 previous delivery attempt). We don't remove the journal if a delivery
8541 subprocess failed to pass back delivery information; this is controlled by
8542 the remove_journal flag. When the journal is left, we also don't move the
8543 message off the main spool if frozen and the option is set. It should get moved
8544 at the next attempt, after the journal has been inspected. */
8546 if (journal_fd >= 0) (void)close(journal_fd);
8550 uschar * fname = spool_fname(US"input", message_subdir, id, US"-J");
8552 if (Uunlink(fname) < 0 && errno != ENOENT)
8553 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s", fname,
8556 /* Move the message off the spool if requested */
8558 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
8559 if (f.deliver_freeze && move_frozen_messages)
8560 (void)spool_move_message(id, message_subdir, US"", US"F");
8564 /* Closing the data file frees the lock; if the file has been unlinked it
8565 will go away. Otherwise the message becomes available for another process
8568 (void)close(deliver_datafile);
8569 deliver_datafile = -1;
8570 DEBUG(D_deliver) debug_printf("end delivery of %s\n", id);
8571 #ifdef MEASURE_TIMING
8572 report_time_since(×tamp_startup, US"delivery end"); /* testcase 0005 */
8575 /* It is unlikely that there will be any cached resources, since they are
8576 released after routing, and in the delivery subprocesses. However, it's
8577 possible for an expansion for something afterwards (for example,
8578 expand_check_condition) to do a lookup. We must therefore be sure everything is
8582 acl_where = ACL_WHERE_UNKNOWN;
8591 #ifdef EXIM_TFO_PROBE
8594 f.tcp_fastopen_ok = TRUE;
8600 /* Called from a commandline, or from the daemon, to do a delivery.
8601 We need to regain privs; do this by exec of the exim binary. */
8604 delivery_re_exec(int exec_type)
8608 if (cutthrough.cctx.sock >= 0 && cutthrough.callout_hold_only)
8610 int channel_fd = cutthrough.cctx.sock;
8612 smtp_peer_options = cutthrough.peer_options;
8613 continue_sequence = 0;
8616 if (cutthrough.is_tls)
8620 smtp_peer_options |= OPTION_TLS;
8621 sending_ip_address = cutthrough.snd_ip;
8622 sending_port = cutthrough.snd_port;
8624 where = US"socketpair";
8625 if (socketpair(AF_UNIX, SOCK_STREAM, 0, pfd) != 0)
8629 testharness_pause_ms(150);
8630 if ((pid = exim_fork(US"tls-proxy-interproc")) < 0)
8633 if (pid == 0) /* child: will fork again to totally disconnect */
8635 smtp_proxy_tls(cutthrough.cctx.tls_ctx, big_buffer, big_buffer_size,
8636 pfd, 5*60, cutthrough.host.name);
8637 /* does not return */
8641 waitpid(pid, NULL, 0);
8642 (void) close(channel_fd); /* release the client socket */
8643 channel_fd = pfd[1];
8647 transport_do_pass_socket(cutthrough.transport, cutthrough.host.name,
8648 cutthrough.host.address, message_id, channel_fd);
8652 cancel_cutthrough_connection(TRUE, US"non-continued delivery");
8653 (void) child_exec_exim(exec_type, FALSE, NULL, FALSE, 2, US"-Mc", message_id);
8655 return; /* compiler quietening; control does not reach here. */
8660 LOG_MAIN | (exec_type == CEE_EXEC_EXIT ? LOG_PANIC : LOG_PANIC_DIE),
8661 "delivery re-exec %s failed: %s", where, strerror(errno));
8663 /* Get here if exec_type == CEE_EXEC_EXIT.
8664 Note: this must be _exit(), not exit(). */
8666 _exit(EX_EXECFAILED);
8672 /* End of deliver.c */