1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) The Exim Maintainers 2020 - 2022 */
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 *, uschar *);
42 static void address_done(address_item *, 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;
71 static address_item *addr_senddsn = NULL;
73 static FILE *message_log = NULL;
74 static BOOL update_spool;
75 static BOOL remove_journal;
76 static int parcount = 0;
77 static pardata *parlist = NULL;
78 static struct pollfd *parpoll;
79 static int return_count;
80 static uschar *frozen_info = US"";
81 static uschar *used_return_path = NULL;
85 /*************************************************
86 * read as much as requested *
87 *************************************************/
89 /* The syscall read(2) doesn't always returns as much as we want. For
90 several reasons it might get less. (Not talking about signals, as syscalls
91 are restartable). When reading from a network or pipe connection the sender
92 might send in smaller chunks, with delays between these chunks. The read(2)
93 may return such a chunk.
95 The more the writer writes and the smaller the pipe between write and read is,
96 the more we get the chance of reading leass than requested. (See bug 2130)
98 This function read(2)s until we got all the data we *requested*.
100 Note: This function may block. Use it only if you're sure about the
101 amount of data you will get.
104 fd the file descriptor to read from
105 buffer pointer to a buffer of size len
106 len the requested(!) amount of bytes
108 Returns: the amount of bytes read
111 readn(int fd, void * buffer, size_t len)
113 uschar * next = buffer;
114 uschar * end = next + len;
118 ssize_t got = read(fd, next, end - next);
120 /* I'm not sure if there are signals that can interrupt us,
121 for now I assume the worst */
122 if (got == -1 && errno == EINTR) continue;
123 if (got <= 0) return next - US buffer;
131 /*************************************************
132 * Make a new address item *
133 *************************************************/
135 /* This function gets the store and initializes with default values. The
136 transport_return value defaults to DEFER, so that any unexpected failure to
137 deliver does not wipe out the message. The default unique string is set to a
138 copy of the address, so that its domain can be lowercased.
141 address the RFC822 address string
142 copy force a copy of the address
144 Returns: a pointer to an initialized address_item
148 deliver_make_addr(uschar *address, BOOL copy)
150 address_item * addr = store_get(sizeof(address_item), GET_UNTAINTED);
151 *addr = address_defaults;
152 if (copy) address = string_copy(address);
153 addr->address = address;
154 addr->unique = string_copy(address);
161 /*************************************************
162 * Set expansion values for an address *
163 *************************************************/
165 /* Certain expansion variables are valid only when handling an address or
166 address list. This function sets them up or clears the values, according to its
170 addr the address in question, or NULL to clear values
175 deliver_set_expansions(address_item *addr)
179 const uschar ***p = address_expansions;
180 while (*p) **p++ = NULL;
184 /* Exactly what gets set depends on whether there is one or more addresses, and
185 what they contain. These first ones are always set, taking their values from
186 the first address. */
188 if (!addr->host_list)
190 deliver_host = deliver_host_address = US"";
191 deliver_host_port = 0;
195 deliver_host = addr->host_list->name;
196 deliver_host_address = addr->host_list->address;
197 deliver_host_port = addr->host_list->port;
200 deliver_recipients = addr;
201 deliver_address_data = addr->prop.address_data;
202 deliver_domain_data = addr->prop.domain_data;
203 deliver_localpart_data = addr->prop.localpart_data;
204 router_var = addr->prop.variables;
206 /* These may be unset for multiple addresses */
208 deliver_domain = addr->domain;
209 self_hostname = addr->self_hostname;
211 #ifdef EXPERIMENTAL_BRIGHTMAIL
212 bmi_deliver = 1; /* deliver by default */
213 bmi_alt_location = NULL;
214 bmi_base64_verdict = NULL;
215 bmi_base64_tracker_verdict = NULL;
218 /* If there's only one address we can set everything. */
222 address_item *addr_orig;
224 deliver_localpart = addr->local_part;
225 deliver_localpart_prefix = addr->prefix;
226 deliver_localpart_prefix_v = addr->prefix_v;
227 deliver_localpart_suffix = addr->suffix;
228 deliver_localpart_suffix_v = addr->suffix_v;
230 for (addr_orig = addr; addr_orig->parent; addr_orig = addr_orig->parent) ;
231 deliver_domain_orig = addr_orig->domain;
233 /* Re-instate any prefix and suffix in the original local part. In all
234 normal cases, the address will have a router associated with it, and we can
235 choose the caseful or caseless version accordingly. However, when a system
236 filter sets up a pipe, file, or autoreply delivery, no router is involved.
237 In this case, though, there won't be any prefix or suffix to worry about. */
239 deliver_localpart_orig = !addr_orig->router
240 ? addr_orig->local_part
241 : addr_orig->router->caseful_local_part
242 ? addr_orig->cc_local_part
243 : addr_orig->lc_local_part;
245 /* If there's a parent, make its domain and local part available, and if
246 delivering to a pipe or file, or sending an autoreply, get the local
247 part from the parent. For pipes and files, put the pipe or file string
248 into address_pipe and address_file. */
252 deliver_domain_parent = addr->parent->domain;
253 deliver_localpart_parent = !addr->parent->router
254 ? addr->parent->local_part
255 : addr->parent->router->caseful_local_part
256 ? addr->parent->cc_local_part
257 : addr->parent->lc_local_part;
259 /* File deliveries have their own flag because they need to be picked out
260 as special more often. */
262 if (testflag(addr, af_pfr))
264 if (testflag(addr, af_file)) address_file = addr->local_part;
265 else if (deliver_localpart[0] == '|') address_pipe = addr->local_part;
266 deliver_localpart = addr->parent->local_part;
267 deliver_localpart_prefix = addr->parent->prefix;
268 deliver_localpart_prefix_v = addr->parent->prefix_v;
269 deliver_localpart_suffix = addr->parent->suffix;
270 deliver_localpart_suffix_v = addr->parent->suffix_v;
274 #ifdef EXPERIMENTAL_BRIGHTMAIL
275 /* Set expansion variables related to Brightmail AntiSpam */
276 bmi_base64_verdict = bmi_get_base64_verdict(deliver_localpart_orig, deliver_domain_orig);
277 bmi_base64_tracker_verdict = bmi_get_base64_tracker_verdict(bmi_base64_verdict);
278 /* get message delivery status (0 - don't deliver | 1 - deliver) */
279 bmi_deliver = bmi_get_delivery_status(bmi_base64_verdict);
280 /* if message is to be delivered, get eventual alternate location */
281 if (bmi_deliver == 1)
282 bmi_alt_location = bmi_get_alt_location(bmi_base64_verdict);
287 /* For multiple addresses, don't set local part, and leave the domain and
288 self_hostname set only if it is the same for all of them. It is possible to
289 have multiple pipe and file addresses, but only when all addresses have routed
290 to the same pipe or file. */
294 if (testflag(addr, af_pfr))
296 if (testflag(addr, af_file)) address_file = addr->local_part;
297 else if (addr->local_part[0] == '|') address_pipe = addr->local_part;
299 for (address_item * addr2 = addr->next; addr2; addr2 = addr2->next)
301 if (deliver_domain && Ustrcmp(deliver_domain, addr2->domain) != 0)
302 deliver_domain = NULL;
304 && ( !addr2->self_hostname
305 || Ustrcmp(self_hostname, addr2->self_hostname) != 0
307 self_hostname = NULL;
308 if (!deliver_domain && !self_hostname) break;
316 /*************************************************
317 * Open a msglog file *
318 *************************************************/
320 /* This function is used both for normal message logs, and for files in the
321 msglog directory that are used to catch output from pipes. Try to create the
322 directory if it does not exist. From release 4.21, normal message logs should
323 be created when the message is received.
325 Called from deliver_message(), can be operating as root.
328 filename the file name
329 mode the mode required
330 error used for saying what failed
332 Returns: a file descriptor, or -1 (with errno set)
336 open_msglog_file(uschar *filename, int mode, uschar **error)
338 if (Ustrstr(filename, US"/../"))
339 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
340 "Attempt to open msglog file path with upward-traversal: '%s'\n", filename);
342 for (int i = 2; i > 0; i--)
344 int fd = Uopen(filename,
345 EXIM_CLOEXEC | EXIM_NOFOLLOW | O_WRONLY|O_APPEND|O_CREAT, mode);
348 /* Set the close-on-exec flag and change the owner to the exim uid/gid (this
349 function is called as root). Double check the mode, because the group setting
350 doesn't always get set automatically. */
353 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
355 if (exim_fchown(fd, exim_uid, exim_gid, filename) < 0)
360 if (fchmod(fd, mode) < 0)
370 (void)directory_make(spool_directory,
371 spool_sname(US"msglog", message_subdir),
372 MSGLOG_DIRECTORY_MODE, TRUE);
375 *error = US"create or open";
382 /*************************************************
383 * Write to msglog if required *
384 *************************************************/
386 /* Write to the message log, if configured. This function may also be called
390 format a string format
396 deliver_msglog(const char *format, ...)
399 if (!message_logs) return;
400 va_start(ap, format);
401 vfprintf(message_log, format, ap);
409 /*************************************************
410 * Replicate status for batch *
411 *************************************************/
413 /* When a transport handles a batch of addresses, it may treat them
414 individually, or it may just put the status in the first one, and return FALSE,
415 requesting that the status be copied to all the others externally. This is the
416 replication function. As well as the status, it copies the transport pointer,
417 which may have changed if appendfile passed the addresses on to a different
420 Argument: pointer to the first address in a chain
425 replicate_status(address_item *addr)
427 for (address_item * addr2 = addr->next; addr2; addr2 = addr2->next)
429 addr2->transport = addr->transport;
430 addr2->transport_return = addr->transport_return;
431 addr2->basic_errno = addr->basic_errno;
432 addr2->more_errno = addr->more_errno;
433 addr2->delivery_time = addr->delivery_time;
434 addr2->special_action = addr->special_action;
435 addr2->message = addr->message;
436 addr2->user_message = addr->user_message;
442 /*************************************************
443 * Compare lists of hosts *
444 *************************************************/
446 /* This function is given two pointers to chains of host items, and it yields
447 TRUE if the lists refer to the same hosts in the same order, except that
449 (1) Multiple hosts with the same non-negative MX values are permitted to appear
450 in different orders. Round-robinning nameservers can cause this to happen.
452 (2) Multiple hosts with the same negative MX values less than MX_NONE are also
453 permitted to appear in different orders. This is caused by randomizing
456 This enables Exim to use a single SMTP transaction for sending to two entirely
457 different domains that happen to end up pointing at the same hosts.
459 We do not try to batch up different A-record host names that refer to the
463 one points to the first host list
464 two points to the second host list
466 Returns: TRUE if the lists refer to the same host set
470 same_hosts(host_item *one, host_item *two)
474 if (Ustrcmp(one->name, two->name) != 0)
477 host_item *end_one = one;
478 host_item *end_two = two;
480 /* Batch up only if there was no MX and the list was not randomized */
482 if (mx == MX_NONE) return FALSE;
484 /* Find the ends of the shortest sequence of identical MX values */
486 while ( end_one->next && end_one->next->mx == mx
487 && end_two->next && end_two->next->mx == mx)
489 end_one = end_one->next;
490 end_two = end_two->next;
493 /* If there aren't any duplicates, there's no match. */
495 if (end_one == one) return FALSE;
497 /* For each host in the 'one' sequence, check that it appears in the 'two'
498 sequence, returning FALSE if not. */
503 for (hi = two; hi != end_two->next; hi = hi->next)
504 if (Ustrcmp(one->name, hi->name) == 0) break;
505 if (hi == end_two->next) return FALSE;
506 if (one == end_one) break;
510 /* All the hosts in the 'one' sequence were found in the 'two' sequence.
511 Ensure both are pointing at the last host, and carry on as for equality. */
516 /* if the names matched but ports do not, mismatch */
517 else if (one->port != two->port)
521 /* DNSSEC equality */
522 if (one->dnssec != two->dnssec) return FALSE;
530 /* True if both are NULL */
537 /*************************************************
538 * Compare header lines *
539 *************************************************/
541 /* This function is given two pointers to chains of header items, and it yields
542 TRUE if they are the same header texts in the same order.
545 one points to the first header list
546 two points to the second header list
548 Returns: TRUE if the lists refer to the same header set
552 same_headers(header_line *one, header_line *two)
554 for (;; one = one->next, two = two->next)
556 if (one == two) return TRUE; /* Includes the case where both NULL */
557 if (!one || !two) return FALSE;
558 if (Ustrcmp(one->text, two->text) != 0) return FALSE;
564 /*************************************************
565 * Compare string settings *
566 *************************************************/
568 /* This function is given two pointers to strings, and it returns
569 TRUE if they are the same pointer, or if the two strings are the same.
572 one points to the first string
573 two points to the second string
575 Returns: TRUE or FALSE
579 same_strings(uschar *one, uschar *two)
581 if (one == two) return TRUE; /* Includes the case where both NULL */
582 if (!one || !two) return FALSE;
583 return (Ustrcmp(one, two) == 0);
588 /*************************************************
589 * Compare uid/gid for addresses *
590 *************************************************/
592 /* This function is given a transport and two addresses. It yields TRUE if the
593 uid/gid/initgroups settings for the two addresses are going to be the same when
598 addr1 the first address
599 addr2 the second address
601 Returns: TRUE or FALSE
605 same_ugid(transport_instance *tp, address_item *addr1, address_item *addr2)
607 if ( !tp->uid_set && !tp->expand_uid
608 && !tp->deliver_as_creator
609 && ( testflag(addr1, af_uid_set) != testflag(addr2, af_gid_set)
610 || ( testflag(addr1, af_uid_set)
611 && ( addr1->uid != addr2->uid
612 || testflag(addr1, af_initgroups) != testflag(addr2, af_initgroups)
616 if ( !tp->gid_set && !tp->expand_gid
617 && ( testflag(addr1, af_gid_set) != testflag(addr2, af_gid_set)
618 || ( testflag(addr1, af_gid_set)
619 && addr1->gid != addr2->gid
629 /*************************************************
630 * Record that an address is complete *
631 *************************************************/
633 /* This function records that an address is complete. This is straightforward
634 for most addresses, where the unique address is just the full address with the
635 domain lower cased. For homonyms (addresses that are the same as one of their
636 ancestors) their are complications. Their unique addresses have \x\ prepended
637 (where x = 0, 1, 2...), so that de-duplication works correctly for siblings and
640 Exim used to record the unique addresses of homonyms as "complete". This,
641 however, fails when the pattern of redirection varies over time (e.g. if taking
642 unseen copies at only some times of day) because the prepended numbers may vary
643 from one delivery run to the next. This problem is solved by never recording
644 prepended unique addresses as complete. Instead, when a homonymic address has
645 actually been delivered via a transport, we record its basic unique address
646 followed by the name of the transport. This is checked in subsequent delivery
647 runs whenever an address is routed to a transport.
649 If the completed address is a top-level one (has no parent, which means it
650 cannot be homonymic) we also add the original address to the non-recipients
651 tree, so that it gets recorded in the spool file and therefore appears as
652 "done" in any spool listings. The original address may differ from the unique
653 address in the case of the domain.
655 Finally, this function scans the list of duplicates, marks as done any that
656 match this address, and calls child_done() for their ancestors.
659 addr address item that has been completed
660 now current time as a string
666 address_done(address_item *addr, uschar *now)
668 update_spool = TRUE; /* Ensure spool gets updated */
670 /* Top-level address */
674 tree_add_nonrecipient(addr->unique);
675 tree_add_nonrecipient(addr->address);
678 /* Homonymous child address */
680 else if (testflag(addr, af_homonym))
683 tree_add_nonrecipient(
684 string_sprintf("%s/%s", addr->unique + 3, addr->transport->name));
687 /* Non-homonymous child address */
689 else tree_add_nonrecipient(addr->unique);
691 /* Check the list of duplicate addresses and ensure they are now marked
694 for (address_item * dup = addr_duplicate; dup; dup = dup->next)
695 if (Ustrcmp(addr->unique, dup->unique) == 0)
697 tree_add_nonrecipient(dup->unique);
698 child_done(dup, now);
705 /*************************************************
706 * Decrease counts in parents and mark done *
707 *************************************************/
709 /* This function is called when an address is complete. If there is a parent
710 address, its count of children is decremented. If there are still other
711 children outstanding, the function exits. Otherwise, if the count has become
712 zero, address_done() is called to mark the parent and its duplicates complete.
713 Then loop for any earlier ancestors.
716 addr points to the completed address item
717 now the current time as a string, for writing to the message log
723 child_done(address_item *addr, uschar *now)
730 if (--addr->child_count > 0) return; /* Incomplete parent */
731 address_done(addr, now);
733 /* Log the completion of all descendents only when there is no ancestor with
734 the same original address. */
736 for (aa = addr->parent; aa; aa = aa->parent)
737 if (Ustrcmp(aa->address, addr->address) == 0) break;
740 deliver_msglog("%s %s: children all complete\n", now, addr->address);
741 DEBUG(D_deliver) debug_printf("%s: children all complete\n", addr->address);
747 /*************************************************
748 * Delivery logging support functions *
749 *************************************************/
751 /* The LOGGING() checks in d_log_interface() are complicated for backwards
752 compatibility. When outgoing interface logging was originally added, it was
753 conditional on just incoming_interface (which is off by default). The
754 outgoing_interface option is on by default to preserve this behaviour, but
755 you can enable incoming_interface and disable outgoing_interface to get I=
756 fields on incoming lines only.
760 addr The address to be logged
762 Returns: New value for s
766 d_log_interface(gstring * g)
768 if (LOGGING(incoming_interface) && LOGGING(outgoing_interface)
769 && sending_ip_address)
771 g = string_fmt_append(g, " I=[%s]", sending_ip_address);
772 if (LOGGING(outgoing_port))
773 g = string_fmt_append(g, ":%d", sending_port);
781 d_hostlog(gstring * g, address_item * addr)
783 host_item * h = addr->host_used;
785 g = string_append(g, 2, US" H=", h->name);
787 if (LOGGING(dnssec) && h->dnssec == DS_YES)
788 g = string_catn(g, US" DS", 3);
790 g = string_append(g, 3, US" [", h->address, US"]");
792 if (LOGGING(outgoing_port))
793 g = string_fmt_append(g, ":%d", h->port);
795 if (continue_sequence > 1) /*XXX this is wrong for a dropped proxyconn. Would have to pass back from transport */
796 g = string_catn(g, US"*", 1);
799 if (LOGGING(proxy) && proxy_local_address)
801 g = string_append(g, 3, US" PRX=[", proxy_local_address, US"]");
802 if (LOGGING(outgoing_port))
803 g = string_fmt_append(g, ":%d", proxy_local_port);
807 g = d_log_interface(g);
809 if (testflag(addr, af_tcp_fastopen))
810 g = string_catn(g, US" TFO*", testflag(addr, af_tcp_fastopen_data) ? 5 : 4);
821 d_tlslog(gstring * g, address_item * addr)
823 if (LOGGING(tls_cipher) && addr->cipher)
825 g = string_append(g, 2, US" X=", addr->cipher);
826 #ifndef DISABLE_TLS_RESUME
827 if (LOGGING(tls_resumption) && testflag(addr, af_tls_resume))
828 g = string_catn(g, US"*", 1);
831 if (LOGGING(tls_certificate_verified) && addr->cipher)
832 g = string_append(g, 2, US" CV=",
833 testflag(addr, af_cert_verified)
836 testflag(addr, af_dane_verified)
842 if (LOGGING(tls_peerdn) && addr->peerdn)
843 g = string_append(g, 3, US" DN=\"", string_printing(addr->peerdn), US"\"");
851 #ifndef DISABLE_EVENT
852 /* Distribute a named event to any listeners.
854 Args: action config option specifying listener
855 event name of the event
856 ev_data associated data for the event
857 errnop pointer to errno for modification, or null
859 Return: string expansion from listener, or NULL
863 event_raise(uschar * action, const uschar * event, uschar * ev_data, int * errnop)
869 debug_printf("Event(%s): event_action=|%s| delivery_IP=%s\n",
871 action, deliver_host_address);
874 event_data = ev_data;
876 if (!(s = expand_string(action)) && *expand_string_message)
877 log_write(0, LOG_MAIN|LOG_PANIC,
878 "failed to expand event_action %s in %s: %s\n",
879 event, transport_name ? transport_name : US"main", expand_string_message);
881 event_name = event_data = NULL;
883 /* If the expansion returns anything but an empty string, flag for
884 the caller to modify his normal processing
889 debug_printf("Event(%s): event_action returned \"%s\"\n", event, s);
891 *errnop = ERRNO_EVENT;
899 msg_event_raise(const uschar * event, const address_item * addr)
901 const uschar * save_domain = deliver_domain;
902 uschar * save_local = deliver_localpart;
903 const uschar * save_host = deliver_host;
904 const uschar * save_address = deliver_host_address;
905 const int save_port = deliver_host_port;
907 router_name = addr->router ? addr->router->name : NULL;
908 deliver_domain = addr->domain;
909 deliver_localpart = addr->local_part;
910 deliver_host = addr->host_used ? addr->host_used->name : NULL;
912 if (!addr->transport)
914 if (Ustrcmp(event, "msg:fail:delivery") == 0)
916 /* An address failed with no transport involved. This happens when
917 a filter was used which triggered a fail command (in such a case
918 a transport isn't needed). Convert it to an internal fail event. */
920 (void) event_raise(event_action, US"msg:fail:internal", addr->message, NULL);
925 transport_name = addr->transport->name;
927 (void) event_raise(addr->transport->event_action, event,
929 || Ustrcmp(addr->transport->driver_name, "smtp") == 0
930 || Ustrcmp(addr->transport->driver_name, "lmtp") == 0
931 || Ustrcmp(addr->transport->driver_name, "autoreply") == 0
932 ? addr->message : NULL,
936 deliver_host_port = save_port;
937 deliver_host_address = save_address;
938 deliver_host = save_host;
939 deliver_localpart = save_local;
940 deliver_domain = save_domain;
941 router_name = transport_name = NULL;
943 #endif /*DISABLE_EVENT*/
947 /******************************************************************************/
950 /*************************************************
951 * Generate local part for logging *
952 *************************************************/
955 string_get_lpart_sub(const address_item * addr, uschar * s)
958 if (testflag(addr, af_utf8_downcvt))
960 uschar * t = string_localpart_utf8_to_alabel(s, NULL);
961 return t ? t : s; /* t is NULL on a failed conversion */
967 /* This function is a subroutine for use in string_log_address() below.
970 addr the address being logged
971 yield the current dynamic buffer pointer
973 Returns: the new value of the buffer pointer
977 string_get_localpart(address_item * addr, gstring * yield)
981 if (testflag(addr, af_include_affixes) && (s = addr->prefix))
982 yield = string_cat(yield, string_get_lpart_sub(addr, s));
984 yield = string_cat(yield, string_get_lpart_sub(addr, addr->local_part));
986 if (testflag(addr, af_include_affixes) && (s = addr->suffix))
987 yield = string_cat(yield, string_get_lpart_sub(addr, s));
993 /*************************************************
994 * Generate log address list *
995 *************************************************/
997 /* This function generates a list consisting of an address and its parents, for
998 use in logging lines. For saved onetime aliased addresses, the onetime parent
999 field is used. If the address was delivered by a transport with rcpt_include_
1000 affixes set, the af_include_affixes bit will be set in the address. In that
1001 case, we include the affixes here too.
1004 g points to growing-string struct
1005 addr bottom (ultimate) address
1006 all_parents if TRUE, include all parents
1007 success TRUE for successful delivery
1009 Returns: a growable string in dynamic store
1013 string_log_address(gstring * g,
1014 address_item *addr, BOOL all_parents, BOOL success)
1016 BOOL add_topaddr = TRUE;
1017 address_item *topaddr;
1019 /* Find the ultimate parent */
1021 for (topaddr = addr; topaddr->parent; topaddr = topaddr->parent) ;
1023 /* We start with just the local part for pipe, file, and reply deliveries, and
1024 for successful local deliveries from routers that have the log_as_local flag
1025 set. File deliveries from filters can be specified as non-absolute paths in
1026 cases where the transport is going to complete the path. If there is an error
1027 before this happens (expansion failure) the local part will not be updated, and
1028 so won't necessarily look like a path. Add extra text for this case. */
1030 if ( testflag(addr, af_pfr)
1032 && addr->router && addr->router->log_as_local
1033 && addr->transport && addr->transport->info->local
1036 if (testflag(addr, af_file) && addr->local_part[0] != '/')
1037 g = string_catn(g, CUS"save ", 5);
1038 g = string_get_localpart(addr, g);
1041 /* Other deliveries start with the full address. It we have split it into local
1042 part and domain, use those fields. Some early failures can happen before the
1043 splitting is done; in those cases use the original field. */
1048 int off = g->ptr; /* start of the "full address" */
1050 if (addr->local_part)
1053 g = string_get_localpart(addr, g);
1054 g = string_catn(g, US"@", 1);
1057 if (testflag(addr, af_utf8_downcvt))
1058 s = string_localpart_utf8_to_alabel(s, NULL);
1060 g = string_cat(g, s);
1063 g = string_cat(g, addr->address);
1065 /* If the address we are going to print is the same as the top address,
1066 and all parents are not being included, don't add on the top address. First
1067 of all, do a caseless comparison; if this succeeds, do a caseful comparison
1068 on the local parts. */
1070 cmp = g->s + off; /* only now, as rebuffer likely done */
1071 string_from_gstring(g); /* ensure nul-terminated */
1072 if ( strcmpic(cmp, topaddr->address) == 0
1073 && Ustrncmp(cmp, topaddr->address, Ustrchr(cmp, '@') - cmp) == 0
1074 && !addr->onetime_parent
1075 && (!all_parents || !addr->parent || addr->parent == topaddr)
1077 add_topaddr = FALSE;
1080 /* If all parents are requested, or this is a local pipe/file/reply, and
1081 there is at least one intermediate parent, show it in brackets, and continue
1082 with all of them if all are wanted. */
1084 if ( (all_parents || testflag(addr, af_pfr))
1086 && addr->parent != topaddr)
1089 for (address_item * addr2 = addr->parent; addr2 != topaddr; addr2 = addr2->parent)
1091 g = string_catn(g, s, 2);
1092 g = string_cat (g, addr2->address);
1093 if (!all_parents) break;
1096 g = string_catn(g, US")", 1);
1099 /* Add the top address if it is required */
1102 g = string_append(g, 3,
1104 addr->onetime_parent ? addr->onetime_parent : topaddr->address,
1112 /******************************************************************************/
1116 /* If msg is NULL this is a delivery log and logchar is used. Otherwise
1117 this is a nonstandard call; no two-character delivery flag is written
1118 but sender-host and sender are prefixed and "msg" is inserted in the log line.
1121 flags passed to log_write()
1124 delivery_log(int flags, address_item * addr, int logchar, uschar * msg)
1126 gstring * g; /* Used for a temporary, expanding buffer, for building log lines */
1129 /* Log the delivery on the main log. We use an extensible string to build up
1130 the log line, and reset the store afterwards. Remote deliveries should always
1131 have a pointer to the host item that succeeded; local deliveries can have a
1132 pointer to a single host item in their host list, for use by the transport. */
1134 #ifndef DISABLE_EVENT
1135 /* presume no successful remote delivery */
1136 lookup_dnssec_authenticated = NULL;
1139 reset_point = store_mark();
1140 g = string_get_tainted(256, GET_TAINTED); /* addrs will be tainted, so avoid copy */
1143 g = string_append(g, 2, host_and_ident(TRUE), US" ");
1146 g->s[0] = logchar; g->ptr = 1;
1147 g = string_catn(g, US"> ", 2);
1149 g = string_log_address(g, addr, LOGGING(all_parents), TRUE);
1151 if (LOGGING(sender_on_delivery) || msg)
1152 g = string_append(g, 3, US" F=<",
1154 testflag(addr, af_utf8_downcvt)
1155 ? string_address_utf8_to_alabel(sender_address, NULL)
1162 g = string_append(g, 2, US" Q=", queue_name);
1164 /* You might think that the return path must always be set for a successful
1165 delivery; indeed, I did for some time, until this statement crashed. The case
1166 when it is not set is for a delivery to /dev/null which is optimised by not
1167 being run at all. */
1169 if (used_return_path && LOGGING(return_path_on_delivery))
1170 g = string_append(g, 3, US" P=<", used_return_path, US">");
1173 g = string_append(g, 2, US" ", msg);
1175 /* For a delivery from a system filter, there may not be a router */
1177 g = string_append(g, 2, US" R=", addr->router->name);
1179 g = string_append(g, 2, US" T=", addr->transport->name);
1181 if (LOGGING(delivery_size))
1182 g = string_fmt_append(g, " S=%d", transport_count);
1184 /* Local delivery */
1186 if (addr->transport->info->local)
1188 if (addr->host_list)
1189 g = string_append(g, 2, US" H=", addr->host_list->name);
1190 g = d_log_interface(g);
1191 if (addr->shadow_message)
1192 g = string_cat(g, addr->shadow_message);
1195 /* Remote delivery */
1199 if (addr->host_used)
1201 g = d_hostlog(g, addr);
1203 #ifndef DISABLE_EVENT
1204 deliver_host_address = addr->host_used->address;
1205 deliver_host_port = addr->host_used->port;
1206 deliver_host = addr->host_used->name;
1208 /* DNS lookup status */
1209 lookup_dnssec_authenticated = addr->host_used->dnssec==DS_YES ? US"yes"
1210 : addr->host_used->dnssec==DS_NO ? US"no"
1216 g = d_tlslog(g, addr);
1219 if (addr->authenticator)
1221 g = string_append(g, 2, US" A=", addr->authenticator);
1224 g = string_append(g, 2, US":", addr->auth_id);
1225 if (LOGGING(smtp_mailauth) && addr->auth_sndr)
1226 g = string_append(g, 2, US":", addr->auth_sndr);
1230 if (LOGGING(pipelining))
1232 if (testflag(addr, af_pipelining))
1233 g = string_catn(g, US" L", 2);
1234 #ifndef DISABLE_PIPE_CONNECT
1235 if (testflag(addr, af_early_pipe))
1236 g = string_catn(g, US"*", 1);
1240 #ifndef DISABLE_PRDR
1241 if (testflag(addr, af_prdr_used))
1242 g = string_catn(g, US" PRDR", 5);
1245 if (testflag(addr, af_chunking_used))
1246 g = string_catn(g, US" K", 2);
1249 /* confirmation message (SMTP (host_used) and LMTP (driver_name)) */
1251 if ( LOGGING(smtp_confirmation)
1253 && (addr->host_used || Ustrcmp(addr->transport->driver_name, "lmtp") == 0)
1256 unsigned lim = big_buffer_size < 1024 ? big_buffer_size : 1024;
1257 uschar *p = big_buffer;
1258 uschar *ss = addr->message;
1260 for (int i = 0; i < lim && ss[i] != 0; i++) /* limit logged amount */
1262 if (ss[i] == '\"' || ss[i] == '\\') *p++ = '\\'; /* quote \ and " */
1267 g = string_append(g, 2, US" C=", big_buffer);
1270 /* Time on queue and actual time taken to deliver */
1272 if (LOGGING(queue_time))
1273 g = string_append(g, 2, US" QT=", string_timesince(
1274 LOGGING(queue_time_exclusive) ? &received_time_complete : &received_time));
1276 if (LOGGING(deliver_time))
1277 g = string_append(g, 2, US" DT=", string_timediff(&addr->delivery_time));
1279 /* string_cat() always leaves room for the terminator. Release the
1280 store we used to build the line after writing it. */
1282 log_write(0, flags, "%s", string_from_gstring(g));
1284 #ifndef DISABLE_EVENT
1285 if (!msg) msg_event_raise(US"msg:delivery", addr);
1288 store_reset(reset_point);
1295 deferral_log(address_item * addr, uschar * now,
1296 int logflags, uschar * driver_name, uschar * driver_kind)
1298 rmark reset_point = store_mark();
1299 gstring * g = string_get(256);
1301 /* Build up the line that is used for both the message log and the main
1304 /* Create the address string for logging. Must not do this earlier, because
1305 an OK result may be changed to FAIL when a pipe returns text. */
1307 g = string_log_address(g, addr, LOGGING(all_parents), FALSE);
1310 g = string_append(g, 2, US" Q=", queue_name);
1312 /* Either driver_name contains something and driver_kind contains
1313 " router" or " transport" (note the leading space), or driver_name is
1314 a null string and driver_kind contains "routing" without the leading
1315 space, if all routing has been deferred. When a domain has been held,
1316 so nothing has been done at all, both variables contain null strings. */
1320 if (driver_kind[1] == 't' && addr->router)
1321 g = string_append(g, 2, US" R=", addr->router->name);
1322 g = string_fmt_append(g, " %c=%s", toupper(driver_kind[1]), driver_name);
1324 else if (driver_kind)
1325 g = string_append(g, 2, US" ", driver_kind);
1327 g = string_fmt_append(g, " defer (%d)", addr->basic_errno);
1329 if (addr->basic_errno > 0)
1330 g = string_append(g, 2, US": ", US strerror(addr->basic_errno));
1332 if (addr->host_used)
1333 g = d_hostlog(g, addr);
1335 if (LOGGING(deliver_time))
1336 g = string_append(g, 2, US" DT=", string_timediff(&addr->delivery_time));
1339 g = string_append(g, 2, US": ", addr->message);
1341 (void) 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, g->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,
1359 store_reset(reset_point);
1366 failure_log(address_item * addr, uschar * driver_kind, uschar * now)
1368 rmark reset_point = store_mark();
1369 gstring * g = string_get(256);
1371 #ifndef DISABLE_EVENT
1372 /* Message failures for which we will send a DSN get their event raised
1373 later so avoid doing it here. */
1375 if ( !addr->prop.ignore_error
1376 && !(addr->dsn_flags & (rf_dsnflags & ~rf_notify_failure))
1378 msg_event_raise(US"msg:fail:delivery", addr);
1381 /* Build up the log line for the message and main logs */
1383 /* Create the address string for logging. Must not do this earlier, because
1384 an OK result may be changed to FAIL when a pipe returns text. */
1386 g = string_log_address(g, addr, LOGGING(all_parents), FALSE);
1388 if (LOGGING(sender_on_delivery))
1389 g = string_append(g, 3, US" F=<", sender_address, US">");
1392 g = string_append(g, 2, US" Q=", queue_name);
1394 /* Return path may not be set if no delivery actually happened */
1396 if (used_return_path && LOGGING(return_path_on_delivery))
1397 g = string_append(g, 3, US" P=<", used_return_path, US">");
1400 g = string_append(g, 2, US" R=", addr->router->name);
1401 if (addr->transport)
1402 g = string_append(g, 2, US" T=", addr->transport->name);
1404 if (addr->host_used)
1405 g = d_hostlog(g, addr);
1408 g = d_tlslog(g, addr);
1411 if (addr->basic_errno > 0)
1412 g = string_append(g, 2, US": ", US strerror(addr->basic_errno));
1415 g = string_append(g, 2, US": ", addr->message);
1417 if (LOGGING(deliver_time))
1418 g = string_append(g, 2, US" DT=", string_timediff(&addr->delivery_time));
1420 (void) string_from_gstring(g);
1422 /* Do the logging. For the message log, "routing failed" for those cases,
1423 just to make it clearer. */
1426 deliver_msglog("%s %s failed for %s\n", now, driver_kind, g->s);
1428 deliver_msglog("%s %s\n", now, g->s);
1430 log_write(0, LOG_MAIN, "** %s", g->s);
1432 store_reset(reset_point);
1438 /*************************************************
1439 * Actions at the end of handling an address *
1440 *************************************************/
1442 /* This is a function for processing a single address when all that can be done
1443 with it has been done.
1446 addr points to the address block
1447 result the result of the delivery attempt
1448 logflags flags for log_write() (LOG_MAIN and/or LOG_PANIC)
1449 driver_type indicates which type of driver (transport, or router) was last
1450 to process the address
1451 logchar '=' or '-' for use when logging deliveries with => or ->
1457 post_process_one(address_item *addr, int result, int logflags, int driver_type,
1460 uschar *now = tod_stamp(tod_log);
1461 uschar *driver_kind = NULL;
1462 uschar *driver_name = NULL;
1464 DEBUG(D_deliver) debug_printf("post-process %s (%d)\n", addr->address, result);
1466 /* Set up driver kind and name for logging. Disable logging if the router or
1467 transport has disabled it. */
1469 if (driver_type == EXIM_DTYPE_TRANSPORT)
1471 if (addr->transport)
1473 driver_name = addr->transport->name;
1474 driver_kind = US" transport";
1475 f.disable_logging = addr->transport->disable_logging;
1477 else driver_kind = US"transporting";
1479 else if (driver_type == EXIM_DTYPE_ROUTER)
1483 driver_name = addr->router->name;
1484 driver_kind = US" router";
1485 f.disable_logging = addr->router->disable_logging;
1487 else driver_kind = US"routing";
1490 /* If there's an error message set, ensure that it contains only printing
1491 characters - it should, but occasionally things slip in and this at least
1492 stops the log format from getting wrecked. We also scan the message for an LDAP
1493 expansion item that has a password setting, and flatten the password. This is a
1494 fudge, but I don't know a cleaner way of doing this. (If the item is badly
1495 malformed, it won't ever have gone near LDAP.) */
1499 const uschar * s = string_printing(addr->message);
1501 /* deconst cast ok as string_printing known to have alloc'n'copied */
1502 addr->message = expand_hide_passwords(US s);
1505 /* If we used a transport that has one of the "return_output" options set, and
1506 if it did in fact generate some output, then for return_output we treat the
1507 message as failed if it was not already set that way, so that the output gets
1508 returned to the sender, provided there is a sender to send it to. For
1509 return_fail_output, do this only if the delivery failed. Otherwise we just
1510 unlink the file, and remove the name so that if the delivery failed, we don't
1511 try to send back an empty or unwanted file. The log_output options operate only
1512 on a non-empty file.
1514 In any case, we close the message file, because we cannot afford to leave a
1515 file-descriptor for one address while processing (maybe very many) others. */
1517 if (addr->return_file >= 0 && addr->return_filename)
1519 BOOL return_output = FALSE;
1520 struct stat statbuf;
1521 (void)EXIMfsync(addr->return_file);
1523 /* If there is no output, do nothing. */
1525 if (fstat(addr->return_file, &statbuf) == 0 && statbuf.st_size > 0)
1527 transport_instance *tb = addr->transport;
1529 /* Handle logging options */
1532 || result == FAIL && tb->log_fail_output
1533 || result == DEFER && tb->log_defer_output
1537 FILE *f = Ufopen(addr->return_filename, "rb");
1539 log_write(0, LOG_MAIN|LOG_PANIC, "failed to open %s to log output "
1540 "from %s transport: %s", addr->return_filename, tb->name,
1543 if ((s = US Ufgets(big_buffer, big_buffer_size, f)))
1545 uschar *p = big_buffer + Ustrlen(big_buffer);
1547 while (p > big_buffer && isspace(p[-1])) p--;
1549 sp = string_printing(big_buffer);
1550 log_write(0, LOG_MAIN, "<%s>: %s transport output: %s",
1551 addr->address, tb->name, sp);
1556 /* Handle returning options, but only if there is an address to return
1559 if (sender_address[0] != 0 || addr->prop.errors_address)
1560 if (tb->return_output)
1562 addr->transport_return = result = FAIL;
1563 if (addr->basic_errno == 0 && !addr->message)
1564 addr->message = US"return message generated";
1565 return_output = TRUE;
1568 if (tb->return_fail_output && result == FAIL) return_output = TRUE;
1571 /* Get rid of the file unless it might be returned, but close it in
1576 Uunlink(addr->return_filename);
1577 addr->return_filename = NULL;
1578 addr->return_file = -1;
1581 (void)close(addr->return_file);
1584 /* Check if the transport notifed continue-conn status explicitly, and
1585 update our knowlege. */
1587 if (testflag(addr, af_new_conn)) continue_sequence = 1;
1588 else if (testflag(addr, af_cont_conn)) continue_sequence++;
1590 /* The success case happens only after delivery by a transport. */
1594 addr->next = addr_succeed;
1595 addr_succeed = addr;
1597 /* Call address_done() to ensure that we don't deliver to this address again,
1598 and write appropriate things to the message log. If it is a child address, we
1599 call child_done() to scan the ancestors and mark them complete if this is the
1600 last child to complete. */
1602 address_done(addr, now);
1603 DEBUG(D_deliver) debug_printf("%s delivered\n", addr->address);
1606 deliver_msglog("%s %s: %s%s succeeded\n", now, addr->address,
1607 driver_name, driver_kind);
1610 deliver_msglog("%s %s <%s>: %s%s succeeded\n", now, addr->address,
1611 addr->parent->address, driver_name, driver_kind);
1612 child_done(addr, now);
1615 /* Certificates for logging (via events) */
1617 tls_out.ourcert = addr->ourcert;
1618 addr->ourcert = NULL;
1619 tls_out.peercert = addr->peercert;
1620 addr->peercert = NULL;
1622 tls_out.ver = addr->tlsver;
1623 tls_out.cipher = addr->cipher;
1624 tls_out.peerdn = addr->peerdn;
1625 tls_out.ocsp = addr->ocsp;
1626 # ifdef SUPPORT_DANE
1627 tls_out.dane_verified = testflag(addr, af_dane_verified);
1631 delivery_log(LOG_MAIN, addr, logchar, NULL);
1634 tls_free_cert(&tls_out.ourcert);
1635 tls_free_cert(&tls_out.peercert);
1637 tls_out.cipher = NULL;
1638 tls_out.peerdn = NULL;
1639 tls_out.ocsp = OCSP_NOT_REQ;
1640 # ifdef SUPPORT_DANE
1641 tls_out.dane_verified = FALSE;
1647 /* Soft failure, or local delivery process failed; freezing may be
1650 else if (result == DEFER || result == PANIC)
1652 if (result == PANIC) logflags |= LOG_PANIC;
1654 /* This puts them on the chain in reverse order. Do not change this, because
1655 the code for handling retries assumes that the one with the retry
1656 information is last. */
1658 addr->next = addr_defer;
1661 /* The only currently implemented special action is to freeze the
1662 message. Logging of this is done later, just before the -H file is
1665 if (addr->special_action == SPECIAL_FREEZE)
1667 f.deliver_freeze = TRUE;
1668 deliver_frozen_at = time(NULL);
1669 update_spool = TRUE;
1672 /* If doing a 2-stage queue run, we skip writing to either the message
1673 log or the main log for SMTP defers. */
1675 if (!f.queue_2stage || addr->basic_errno != 0)
1676 deferral_log(addr, now, logflags, driver_name, driver_kind);
1680 /* Hard failure. If there is an address to which an error message can be sent,
1681 put this address on the failed list. If not, put it on the deferred list and
1682 freeze the mail message for human attention. The latter action can also be
1683 explicitly requested by a router or transport. */
1687 /* If this is a delivery error, or a message for which no replies are
1688 wanted, and the message's age is greater than ignore_bounce_errors_after,
1689 force the af_ignore_error flag. This will cause the address to be discarded
1690 later (with a log entry). */
1692 if (!*sender_address && message_age >= ignore_bounce_errors_after)
1693 addr->prop.ignore_error = TRUE;
1695 /* Freeze the message if requested, or if this is a bounce message (or other
1696 message with null sender) and this address does not have its own errors
1697 address. However, don't freeze if errors are being ignored. The actual code
1698 to ignore occurs later, instead of sending a message. Logging of freezing
1699 occurs later, just before writing the -H file. */
1701 if ( !addr->prop.ignore_error
1702 && ( addr->special_action == SPECIAL_FREEZE
1703 || (sender_address[0] == 0 && !addr->prop.errors_address)
1706 frozen_info = addr->special_action == SPECIAL_FREEZE
1708 : f.sender_local && !f.local_error_message
1709 ? US" (message created with -f <>)"
1710 : US" (delivery error message)";
1711 f.deliver_freeze = TRUE;
1712 deliver_frozen_at = time(NULL);
1713 update_spool = TRUE;
1715 /* The address is put on the defer rather than the failed queue, because
1716 the message is being retained. */
1718 addr->next = addr_defer;
1722 /* Don't put the address on the nonrecipients tree yet; wait until an
1723 error message has been successfully sent. */
1727 addr->next = addr_failed;
1731 failure_log(addr, driver_name ? NULL : driver_kind, now);
1734 /* Ensure logging is turned on again in all cases */
1736 f.disable_logging = FALSE;
1742 /*************************************************
1743 * Address-independent error *
1744 *************************************************/
1746 /* This function is called when there's an error that is not dependent on a
1747 particular address, such as an expansion string failure. It puts the error into
1748 all the addresses in a batch, logs the incident on the main and panic logs, and
1749 clears the expansions. It is mostly called from local_deliver(), but can be
1750 called for a remote delivery via findugid().
1753 logit TRUE if (MAIN+PANIC) logging required
1754 addr the first of the chain of addresses
1756 format format string for error message, or NULL if already set in addr
1757 ... arguments for the format
1763 common_error(BOOL logit, address_item *addr, int code, uschar *format, ...)
1765 addr->basic_errno = code;
1772 va_start(ap, format);
1773 g = string_vformat(NULL, SVFMT_EXTEND|SVFMT_REBUFFER, CS format, ap);
1775 addr->message = string_from_gstring(g);
1778 for (address_item * addr2 = addr->next; addr2; addr2 = addr2->next)
1780 addr2->basic_errno = code;
1781 addr2->message = addr->message;
1784 if (logit) log_write(0, LOG_MAIN|LOG_PANIC, "%s", addr->message);
1785 deliver_set_expansions(NULL);
1791 /*************************************************
1792 * Check a "never users" list *
1793 *************************************************/
1795 /* This function is called to check whether a uid is on one of the two "never
1799 uid the uid to be checked
1800 nusers the list to be scanned; the first item in the list is the count
1802 Returns: TRUE if the uid is on the list
1806 check_never_users(uid_t uid, uid_t *nusers)
1808 if (!nusers) return FALSE;
1809 for (int i = 1; i <= (int)(nusers[0]); i++) if (nusers[i] == uid) return TRUE;
1815 /*************************************************
1816 * Find uid and gid for a transport *
1817 *************************************************/
1819 /* This function is called for both local and remote deliveries, to find the
1820 uid/gid under which to run the delivery. The values are taken preferentially
1821 from the transport (either explicit or deliver_as_creator), then from the
1822 address (i.e. the router), and if nothing is set, the exim uid/gid are used. If
1823 the resulting uid is on the "never_users" or the "fixed_never_users" list, a
1824 panic error is logged, and the function fails (which normally leads to delivery
1828 addr the address (possibly a chain)
1830 uidp pointer to uid field
1831 gidp pointer to gid field
1832 igfp pointer to the use_initgroups field
1834 Returns: FALSE if failed - error has been set in address(es)
1838 findugid(address_item *addr, transport_instance *tp, uid_t *uidp, gid_t *gidp,
1842 BOOL gid_set = FALSE;
1844 /* Default initgroups flag comes from the transport */
1846 *igfp = tp->initgroups;
1848 /* First see if there's a gid on the transport, either fixed or expandable.
1849 The expanding function always logs failure itself. */
1856 else if (tp->expand_gid)
1858 if (!route_find_expanded_group(tp->expand_gid, tp->name, US"transport", gidp,
1861 common_error(FALSE, addr, ERRNO_GIDFAIL, NULL);
1867 /* If the transport did not set a group, see if the router did. */
1869 if (!gid_set && testflag(addr, af_gid_set))
1875 /* Pick up a uid from the transport if one is set. */
1877 if (tp->uid_set) *uidp = tp->uid;
1879 /* Otherwise, try for an expandable uid field. If it ends up as a numeric id,
1880 it does not provide a passwd value from which a gid can be taken. */
1882 else if (tp->expand_uid)
1885 if (!route_find_expanded_user(tp->expand_uid, tp->name, US"transport", &pw,
1886 uidp, &(addr->message)))
1888 common_error(FALSE, addr, ERRNO_UIDFAIL, NULL);
1898 /* If the transport doesn't set the uid, test the deliver_as_creator flag. */
1900 else if (tp->deliver_as_creator)
1902 *uidp = originator_uid;
1905 *gidp = originator_gid;
1910 /* Otherwise see if the address specifies the uid and if so, take it and its
1913 else if (testflag(addr, af_uid_set))
1916 *igfp = testflag(addr, af_initgroups);
1919 /* Nothing has specified the uid - default to the Exim user, and group if the
1932 /* If no gid is set, it is a disaster. We default to the Exim gid only if
1933 defaulting to the Exim uid. In other words, if the configuration has specified
1934 a uid, it must also provide a gid. */
1938 common_error(TRUE, addr, ERRNO_GIDFAIL, US"User set without group for "
1939 "%s transport", tp->name);
1943 /* Check that the uid is not on the lists of banned uids that may not be used
1944 for delivery processes. */
1946 nuname = check_never_users(*uidp, never_users)
1948 : check_never_users(*uidp, fixed_never_users)
1949 ? US"fixed_never_users"
1953 common_error(TRUE, addr, ERRNO_UIDFAIL, US"User %ld set for %s transport "
1954 "is on the %s list", (long int)(*uidp), tp->name, nuname);
1966 /*************************************************
1967 * Check the size of a message for a transport *
1968 *************************************************/
1970 /* Checks that the message isn't too big for the selected transport.
1971 This is called only when it is known that the limit is set.
1975 addr the (first) address being delivered
1978 DEFER expansion failed or did not yield an integer
1979 FAIL message too big
1983 check_message_size(transport_instance *tp, address_item *addr)
1988 deliver_set_expansions(addr);
1989 size_limit = expand_string_integer(tp->message_size_limit, TRUE);
1990 deliver_set_expansions(NULL);
1992 if (expand_string_message)
1995 addr->message = size_limit == -1
1996 ? string_sprintf("failed to expand message_size_limit "
1997 "in %s transport: %s", tp->name, expand_string_message)
1998 : string_sprintf("invalid message_size_limit "
1999 "in %s transport: %s", tp->name, expand_string_message);
2001 else if (size_limit > 0 && message_size > size_limit)
2005 string_sprintf("message is too big (transport limit = %d)",
2014 /*************************************************
2015 * Transport-time check for a previous delivery *
2016 *************************************************/
2018 /* Check that this base address hasn't previously been delivered to its routed
2019 transport. If it has been delivered, mark it done. The check is necessary at
2020 delivery time in order to handle homonymic addresses correctly in cases where
2021 the pattern of redirection changes between delivery attempts (so the unique
2022 fields change). Non-homonymic previous delivery is detected earlier, at routing
2023 time (which saves unnecessary routing).
2026 addr the address item
2027 testing TRUE if testing wanted only, without side effects
2029 Returns: TRUE if previously delivered by the transport
2033 previously_transported(address_item *addr, BOOL testing)
2035 uschar * s = string_sprintf("%s/%s",
2036 addr->unique + (testflag(addr, af_homonym)? 3:0), addr->transport->name);
2038 if (tree_search(tree_nonrecipients, s) != 0)
2040 DEBUG(D_deliver|D_route|D_transport)
2041 debug_printf("%s was previously delivered (%s transport): discarded\n",
2042 addr->address, addr->transport->name);
2043 if (!testing) child_done(addr, tod_stamp(tod_log));
2052 /******************************************************
2053 * Check for a given header in a header string *
2054 ******************************************************/
2056 /* This function is used when generating quota warnings. The configuration may
2057 specify any header lines it likes in quota_warn_message. If certain of them are
2058 missing, defaults are inserted, so we need to be able to test for the presence
2062 hdr the required header name
2063 hstring the header string
2065 Returns: TRUE the header is in the string
2066 FALSE the header is not in the string
2070 contains_header(uschar *hdr, uschar *hstring)
2072 int len = Ustrlen(hdr);
2073 uschar *p = hstring;
2076 if (strncmpic(p, hdr, len) == 0)
2079 while (*p == ' ' || *p == '\t') p++;
2080 if (*p == ':') return TRUE;
2082 while (*p != 0 && *p != '\n') p++;
2083 if (*p == '\n') p++;
2091 /*************************************************
2092 * Perform a local delivery *
2093 *************************************************/
2095 /* Each local delivery is performed in a separate process which sets its
2096 uid and gid as specified. This is a safer way than simply changing and
2097 restoring using seteuid(); there is a body of opinion that seteuid()
2098 cannot be used safely. From release 4, Exim no longer makes any use of
2099 it for delivery. Besides, not all systems have seteuid().
2101 If the uid/gid are specified in the transport_instance, they are used; the
2102 transport initialization must ensure that either both or neither are set.
2103 Otherwise, the values associated with the address are used. If neither are set,
2104 it is a configuration error.
2106 The transport or the address may specify a home directory (transport over-
2107 rides), and if they do, this is set as $home. If neither have set a working
2108 directory, this value is used for that as well. Otherwise $home is left unset
2109 and the cwd is set to "/" - a directory that should be accessible to all users.
2111 Using a separate process makes it more complicated to get error information
2112 back. We use a pipe to pass the return code and also an error code and error
2113 text string back to the parent process.
2116 addr points to an address block for this delivery; for "normal" local
2117 deliveries this is the only address to be delivered, but for
2118 pseudo-remote deliveries (e.g. by batch SMTP to a file or pipe)
2119 a number of addresses can be handled simultaneously, and in this
2120 case addr will point to a chain of addresses with the same
2123 shadowing TRUE if running a shadow transport; this causes output from pipes
2130 deliver_local(address_item *addr, BOOL shadowing)
2132 BOOL use_initgroups;
2135 int status, len, rc;
2138 uschar *working_directory;
2139 address_item *addr2;
2140 transport_instance *tp = addr->transport;
2142 /* Set up the return path from the errors or sender address. If the transport
2143 has its own return path setting, expand it and replace the existing value. */
2145 if(addr->prop.errors_address)
2146 return_path = addr->prop.errors_address;
2148 return_path = sender_address;
2150 if (tp->return_path)
2152 uschar * new_return_path = expand_string(tp->return_path);
2153 if (new_return_path)
2154 return_path = new_return_path;
2155 else if (!f.expand_string_forcedfail)
2157 common_error(TRUE, addr, ERRNO_EXPANDFAIL,
2158 US"Failed to expand return path \"%s\" in %s transport: %s",
2159 tp->return_path, tp->name, expand_string_message);
2164 /* For local deliveries, one at a time, the value used for logging can just be
2165 set directly, once and for all. */
2167 used_return_path = return_path;
2169 /* Sort out the uid, gid, and initgroups flag. If an error occurs, the message
2170 gets put into the address(es), and the expansions are unset, so we can just
2173 if (!findugid(addr, tp, &uid, &gid, &use_initgroups)) return;
2175 /* See if either the transport or the address specifies a home directory. A
2176 home directory set in the address may already be expanded; a flag is set to
2177 indicate that. In other cases we must expand it. */
2179 if ( (deliver_home = tp->home_dir) /* Set in transport, or */
2180 || ( (deliver_home = addr->home_dir) /* Set in address and */
2181 && !testflag(addr, af_home_expanded) /* not expanded */
2184 uschar *rawhome = deliver_home;
2185 deliver_home = NULL; /* in case it contains $home */
2186 if (!(deliver_home = expand_string(rawhome)))
2188 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"home directory \"%s\" failed "
2189 "to expand for %s transport: %s", rawhome, tp->name,
2190 expand_string_message);
2193 if (*deliver_home != '/')
2195 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"home directory path \"%s\" "
2196 "is not absolute for %s transport", deliver_home, tp->name);
2201 /* See if either the transport or the address specifies a current directory,
2202 and if so, expand it. If nothing is set, use the home directory, unless it is
2203 also unset in which case use "/", which is assumed to be a directory to which
2204 all users have access. It is necessary to be in a visible directory for some
2205 operating systems when running pipes, as some commands (e.g. "rm" under Solaris
2206 2.5) require this. */
2208 working_directory = tp->current_dir ? tp->current_dir : addr->current_dir;
2209 if (working_directory)
2211 uschar *raw = working_directory;
2212 if (!(working_directory = expand_string(raw)))
2214 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"current directory \"%s\" "
2215 "failed to expand for %s transport: %s", raw, tp->name,
2216 expand_string_message);
2219 if (*working_directory != '/')
2221 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"current directory path "
2222 "\"%s\" is not absolute for %s transport", working_directory, tp->name);
2226 else working_directory = deliver_home ? deliver_home : US"/";
2228 /* If one of the return_output flags is set on the transport, create and open a
2229 file in the message log directory for the transport to write its output onto.
2230 This is mainly used by pipe transports. The file needs to be unique to the
2231 address. This feature is not available for shadow transports. */
2234 && ( tp->return_output || tp->return_fail_output
2235 || tp->log_output || tp->log_fail_output || tp->log_defer_output
2240 addr->return_filename =
2241 spool_fname(US"msglog", message_subdir, message_id,
2242 string_sprintf("-%d-%d", getpid(), return_count++));
2244 if ((addr->return_file = open_msglog_file(addr->return_filename, 0400, &error)) < 0)
2246 common_error(TRUE, addr, errno, US"Unable to %s file for %s transport "
2247 "to return message: %s", error, tp->name, strerror(errno));
2252 /* Create the pipe for inter-process communication. */
2256 common_error(TRUE, addr, ERRNO_PIPEFAIL, US"Creation of pipe failed: %s",
2261 /* Now fork the process to do the real work in the subprocess, but first
2262 ensure that all cached resources are freed so that the subprocess starts with
2263 a clean slate and doesn't interfere with the parent process. */
2267 if ((pid = exim_fork(US"delivery-local")) == 0)
2269 BOOL replicate = TRUE;
2271 /* Prevent core dumps, as we don't want them in users' home directories.
2272 HP-UX doesn't have RLIMIT_CORE; I don't know how to do this in that
2273 system. Some experimental/developing systems (e.g. GNU/Hurd) may define
2274 RLIMIT_CORE but not support it in setrlimit(). For such systems, do not
2275 complain if the error is "not supported".
2277 There are two scenarios where changing the max limit has an effect. In one,
2278 the user is using a .forward and invoking a command of their choice via pipe;
2279 for these, we do need the max limit to be 0 unless the admin chooses to
2280 permit an increased limit. In the other, the command is invoked directly by
2281 the transport and is under administrator control, thus being able to raise
2282 the limit aids in debugging. So there's no general always-right answer.
2284 Thus we inhibit core-dumps completely but let individual transports, while
2285 still root, re-raise the limits back up to aid debugging. We make the
2286 default be no core-dumps -- few enough people can use core dumps in
2287 diagnosis that it's reasonable to make them something that has to be explicitly requested.
2294 if (setrlimit(RLIMIT_CORE, &rl) < 0)
2296 # ifdef SETRLIMIT_NOT_SUPPORTED
2297 if (errno != ENOSYS && errno != ENOTSUP)
2299 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_CORE) failed: %s",
2304 /* Reset the random number generator, so different processes don't all
2305 have the same sequence. */
2309 /* If the transport has a setup entry, call this first, while still
2310 privileged. (Appendfile uses this to expand quota, for example, while
2311 able to read private files.) */
2313 if (addr->transport->setup)
2314 switch((addr->transport->setup)(addr->transport, addr, NULL, uid, gid,
2318 addr->transport_return = DEFER;
2322 addr->transport_return = PANIC;
2326 /* Ignore SIGINT and SIGTERM during delivery. Also ignore SIGUSR1, as
2327 when the process becomes unprivileged, it won't be able to write to the
2328 process log. SIGHUP is ignored throughout exim, except when it is being
2331 signal(SIGINT, SIG_IGN);
2332 signal(SIGTERM, SIG_IGN);
2333 signal(SIGUSR1, SIG_IGN);
2335 /* Close the unwanted half of the pipe, and set close-on-exec for the other
2336 half - for transports that exec things (e.g. pipe). Then set the required
2339 (void)close(pfd[pipe_read]);
2340 (void)fcntl(pfd[pipe_write], F_SETFD, fcntl(pfd[pipe_write], F_GETFD) |
2342 exim_setugid(uid, gid, use_initgroups,
2343 string_sprintf("local delivery to %s <%s> transport=%s", addr->local_part,
2344 addr->address, addr->transport->name));
2348 debug_printf(" home=%s current=%s\n", deliver_home, working_directory);
2349 for (address_item * batched = addr->next; batched; batched = batched->next)
2350 debug_printf("additional batched address: %s\n", batched->address);
2353 /* Set an appropriate working directory. */
2355 if (Uchdir(working_directory) < 0)
2357 addr->transport_return = DEFER;
2358 addr->basic_errno = errno;
2359 addr->message = string_sprintf("failed to chdir to %s", working_directory);
2362 /* If successful, call the transport */
2367 set_process_info("delivering %s to %s using %s", message_id,
2368 addr->local_part, tp->name);
2370 /* Setting these globals in the subprocess means we need never clear them */
2371 transport_name = addr->transport->name;
2372 driver_srcfile = tp->srcfile;
2373 driver_srcline = tp->srcline;
2375 /* If a transport filter has been specified, set up its argument list.
2376 Any errors will get put into the address, and FALSE yielded. */
2378 if (tp->filter_command)
2380 ok = transport_set_up_command(&transport_filter_argv,
2382 TRUE, PANIC, addr, FALSE, US"transport filter", NULL);
2383 transport_filter_timeout = tp->filter_timeout;
2385 else transport_filter_argv = NULL;
2389 debug_print_string(tp->debug_string);
2390 replicate = !(tp->info->code)(addr->transport, addr);
2394 /* Pass the results back down the pipe. If necessary, first replicate the
2395 status in the top address to the others in the batch. The label is the
2396 subject of a goto when a call to the transport's setup function fails. We
2397 pass the pointer to the transport back in case it got changed as a result of
2398 file_format in appendfile. */
2402 if (replicate) replicate_status(addr);
2403 for (addr2 = addr; addr2; addr2 = addr2->next)
2406 int local_part_length = Ustrlen(addr2->local_part);
2410 if( (i = addr2->transport_return, (ret = write(pfd[pipe_write], &i, sizeof(int))) != sizeof(int))
2411 || (ret = write(pfd[pipe_write], &transport_count, sizeof(transport_count))) != sizeof(transport_count)
2412 || (ret = write(pfd[pipe_write], &addr2->flags, sizeof(addr2->flags))) != sizeof(addr2->flags)
2413 || (ret = write(pfd[pipe_write], &addr2->basic_errno, sizeof(int))) != sizeof(int)
2414 || (ret = write(pfd[pipe_write], &addr2->more_errno, sizeof(int))) != sizeof(int)
2415 || (ret = write(pfd[pipe_write], &addr2->delivery_time, sizeof(struct timeval))) != sizeof(struct timeval)
2416 || (i = addr2->special_action, (ret = write(pfd[pipe_write], &i, sizeof(int))) != sizeof(int))
2417 || (ret = write(pfd[pipe_write], &addr2->transport,
2418 sizeof(transport_instance *))) != sizeof(transport_instance *)
2420 /* For a file delivery, pass back the local part, in case the original
2421 was only part of the final delivery path. This gives more complete
2424 || (testflag(addr2, af_file)
2425 && ( (ret = write(pfd[pipe_write], &local_part_length, sizeof(int))) != sizeof(int)
2426 || (ret = write(pfd[pipe_write], addr2->local_part, local_part_length)) != local_part_length
2430 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s",
2431 ret == -1 ? strerror(errno) : "short write");
2433 /* Now any messages */
2435 for (i = 0, s = addr2->message; i < 2; i++, s = addr2->user_message)
2437 int message_length = s ? Ustrlen(s) + 1 : 0;
2438 if( (ret = write(pfd[pipe_write], &message_length, sizeof(int))) != sizeof(int)
2439 || message_length > 0 && (ret = write(pfd[pipe_write], s, message_length)) != message_length
2441 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s",
2442 ret == -1 ? strerror(errno) : "short write");
2446 /* OK, this process is now done. Free any cached resources that it opened,
2447 and close the pipe we were writing down before exiting. */
2449 (void)close(pfd[pipe_write]);
2454 /* Back in the main process: panic if the fork did not succeed. This seems
2455 better than returning an error - if forking is failing it is probably best
2456 not to try other deliveries for this message. */
2459 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Fork failed for local delivery to %s",
2462 /* Read the pipe to get the delivery status codes and error messages. Our copy
2463 of the writing end must be closed first, as otherwise read() won't return zero
2464 on an empty pipe. We check that a status exists for each address before
2465 overwriting the address structure. If data is missing, the default DEFER status
2466 will remain. Afterwards, close the reading end. */
2468 (void)close(pfd[pipe_write]);
2470 for (addr2 = addr; addr2; addr2 = addr2->next)
2472 if ((len = read(pfd[pipe_read], &status, sizeof(int))) > 0)
2477 addr2->transport_return = status;
2478 len = read(pfd[pipe_read], &transport_count,
2479 sizeof(transport_count));
2480 len = read(pfd[pipe_read], &addr2->flags, sizeof(addr2->flags));
2481 len = read(pfd[pipe_read], &addr2->basic_errno, sizeof(int));
2482 len = read(pfd[pipe_read], &addr2->more_errno, sizeof(int));
2483 len = read(pfd[pipe_read], &addr2->delivery_time, sizeof(struct timeval));
2484 len = read(pfd[pipe_read], &i, sizeof(int)); addr2->special_action = i;
2485 len = read(pfd[pipe_read], &addr2->transport,
2486 sizeof(transport_instance *));
2488 if (testflag(addr2, af_file))
2491 if ( read(pfd[pipe_read], &llen, sizeof(int)) != sizeof(int)
2492 || llen > 64*4 /* limit from rfc 5821, times I18N factor */
2495 log_write(0, LOG_MAIN|LOG_PANIC, "bad local_part length read"
2496 " from delivery subprocess");
2499 /* sanity-checked llen so disable the Coverity error */
2500 /* coverity[tainted_data] */
2501 if (read(pfd[pipe_read], big_buffer, llen) != llen)
2503 log_write(0, LOG_MAIN|LOG_PANIC, "bad local_part read"
2504 " from delivery subprocess");
2507 big_buffer[llen] = 0;
2508 addr2->local_part = string_copy(big_buffer);
2511 for (i = 0, sptr = &addr2->message; i < 2; i++, sptr = &addr2->user_message)
2514 len = read(pfd[pipe_read], &message_length, sizeof(int));
2515 if (message_length > 0)
2517 len = read(pfd[pipe_read], big_buffer, message_length);
2518 big_buffer[big_buffer_size-1] = '\0'; /* guard byte */
2519 if (len > 0) *sptr = string_copy(big_buffer);
2526 log_write(0, LOG_MAIN|LOG_PANIC, "failed to read delivery status for %s "
2527 "from delivery subprocess", addr2->unique);
2532 (void)close(pfd[pipe_read]);
2534 /* Unless shadowing, write all successful addresses immediately to the journal
2535 file, to ensure they are recorded asap. For homonymic addresses, use the base
2536 address plus the transport name. Failure to write the journal is panic-worthy,
2537 but don't stop, as it may prove possible subsequently to update the spool file
2538 in order to record the delivery. */
2542 for (addr2 = addr; addr2; addr2 = addr2->next)
2543 if (addr2->transport_return == OK)
2545 if (testflag(addr2, af_homonym))
2546 sprintf(CS big_buffer, "%.500s/%s\n", addr2->unique + 3, tp->name);
2548 sprintf(CS big_buffer, "%.500s\n", addr2->unique);
2550 /* In the test harness, wait just a bit to let the subprocess finish off
2551 any debug output etc first. */
2553 testharness_pause_ms(300);
2555 DEBUG(D_deliver) debug_printf("journalling %s", big_buffer);
2556 len = Ustrlen(big_buffer);
2557 if (write(journal_fd, big_buffer, len) != len)
2558 log_write(0, LOG_MAIN|LOG_PANIC, "failed to update journal for %s: %s",
2559 big_buffer, strerror(errno));
2562 /* Ensure the journal file is pushed out to disk. */
2564 if (EXIMfsync(journal_fd) < 0)
2565 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s",
2569 /* Wait for the process to finish. If it terminates with a non-zero code,
2570 freeze the message (except for SIGTERM, SIGKILL and SIGQUIT), but leave the
2571 status values of all the addresses as they are. Take care to handle the case
2572 when the subprocess doesn't seem to exist. This has been seen on one system
2573 when Exim was called from an MUA that set SIGCHLD to SIG_IGN. When that
2574 happens, wait() doesn't recognize the termination of child processes. Exim now
2575 resets SIGCHLD to SIG_DFL, but this code should still be robust. */
2577 while ((rc = wait(&status)) != pid)
2578 if (rc < 0 && errno == ECHILD) /* Process has vanished */
2580 log_write(0, LOG_MAIN, "%s transport process vanished unexpectedly",
2581 addr->transport->driver_name);
2586 if ((status & 0xffff) != 0)
2588 int msb = (status >> 8) & 255;
2589 int lsb = status & 255;
2590 int code = (msb == 0)? (lsb & 0x7f) : msb;
2591 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
2592 addr->special_action = SPECIAL_FREEZE;
2593 log_write(0, LOG_MAIN|LOG_PANIC, "%s transport process returned non-zero "
2594 "status 0x%04x: %s %d",
2595 addr->transport->driver_name,
2597 msb == 0 ? "terminated by signal" : "exit code",
2601 /* If SPECIAL_WARN is set in the top address, send a warning message. */
2603 if (addr->special_action == SPECIAL_WARN && addr->transport->warn_message)
2606 uschar *warn_message;
2609 DEBUG(D_deliver) debug_printf("Warning message requested by transport\n");
2611 if (!(warn_message = expand_string(addr->transport->warn_message)))
2612 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand \"%s\" (warning "
2613 "message for %s transport): %s", addr->transport->warn_message,
2614 addr->transport->name, expand_string_message);
2616 else if ((pid = child_open_exim(&fd, US"tpt-warning-message")) > 0)
2618 FILE *f = fdopen(fd, "wb");
2619 if (errors_reply_to && !contains_header(US"Reply-To", warn_message))
2620 fprintf(f, "Reply-To: %s\n", errors_reply_to);
2621 fprintf(f, "Auto-Submitted: auto-replied\n");
2622 if (!contains_header(US"From", warn_message))
2624 fprintf(f, "%s", CS warn_message);
2626 /* Close and wait for child process to complete, without a timeout. */
2629 (void)child_close(pid, 0);
2632 addr->special_action = SPECIAL_NONE;
2639 /* Check transport for the given concurrency limit. Return TRUE if over
2640 the limit (or an expansion failure), else FALSE and if there was a limit,
2641 the key for the hints database used for the concurrency count. */
2644 tpt_parallel_check(transport_instance * tp, address_item * addr, uschar ** key)
2646 unsigned max_parallel;
2648 if (!tp->max_parallel) return FALSE;
2650 max_parallel = (unsigned) expand_string_integer(tp->max_parallel, TRUE);
2651 if (expand_string_message)
2653 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand max_parallel option "
2654 "in %s transport (%s): %s", tp->name, addr->address,
2655 expand_string_message);
2659 if (max_parallel > 0)
2661 uschar * serialize_key = string_sprintf("tpt-serialize-%s", tp->name);
2662 if (!enq_start(serialize_key, max_parallel))
2664 address_item * next;
2666 debug_printf("skipping tpt %s because concurrency limit %u reached\n",
2667 tp->name, max_parallel);
2671 addr->message = US"concurrency limit reached for transport";
2672 addr->basic_errno = ERRNO_TRETRY;
2673 post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_TRANSPORT, 0);
2674 } while ((addr = next));
2677 *key = serialize_key;
2684 /*************************************************
2685 * Do local deliveries *
2686 *************************************************/
2688 /* This function processes the list of addresses in addr_local. True local
2689 deliveries are always done one address at a time. However, local deliveries can
2690 be batched up in some cases. Typically this is when writing batched SMTP output
2691 files for use by some external transport mechanism, or when running local
2692 deliveries over LMTP.
2699 do_local_deliveries(void)
2702 open_db *dbm_file = NULL;
2703 time_t now = time(NULL);
2705 /* Loop until we have exhausted the supply of local deliveries */
2709 struct timeval delivery_start;
2710 struct timeval deliver_time;
2711 address_item *addr2, *addr3, *nextaddr;
2712 int logflags = LOG_MAIN;
2713 int logchar = f.dont_deliver? '*' : '=';
2714 transport_instance *tp;
2715 uschar * serialize_key = NULL;
2717 /* Pick the first undelivered address off the chain */
2719 address_item *addr = addr_local;
2720 addr_local = addr->next;
2723 DEBUG(D_deliver|D_transport)
2724 debug_printf("--------> %s <--------\n", addr->address);
2726 /* An internal disaster if there is no transport. Should not occur! */
2728 if (!(tp = addr->transport))
2730 logflags |= LOG_PANIC;
2731 f.disable_logging = FALSE; /* Jic */
2732 addr->message = addr->router
2733 ? string_sprintf("No transport set by %s router", addr->router->name)
2734 : US"No transport set by system filter";
2735 post_process_one(addr, DEFER, logflags, EXIM_DTYPE_TRANSPORT, 0);
2739 /* Check that this base address hasn't previously been delivered to this
2740 transport. The check is necessary at this point to handle homonymic addresses
2741 correctly in cases where the pattern of redirection changes between delivery
2742 attempts. Non-homonymic previous delivery is detected earlier, at routing
2745 if (previously_transported(addr, FALSE)) continue;
2747 /* There are weird cases where logging is disabled */
2749 f.disable_logging = tp->disable_logging;
2751 /* Check for batched addresses and possible amalgamation. Skip all the work
2752 if either batch_max <= 1 or there aren't any other addresses for local
2755 if (tp->batch_max > 1 && addr_local)
2757 int batch_count = 1;
2758 BOOL uses_dom = readconf_depends((driver_instance *)tp, US"domain");
2759 BOOL uses_lp = ( testflag(addr, af_pfr)
2760 && (testflag(addr, af_file) || addr->local_part[0] == '|')
2762 || readconf_depends((driver_instance *)tp, US"local_part");
2763 uschar *batch_id = NULL;
2764 address_item **anchor = &addr_local;
2765 address_item *last = addr;
2768 /* Expand the batch_id string for comparison with other addresses.
2769 Expansion failure suppresses batching. */
2773 deliver_set_expansions(addr);
2774 batch_id = expand_string(tp->batch_id);
2775 deliver_set_expansions(NULL);
2778 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2779 "in %s transport (%s): %s", tp->name, addr->address,
2780 expand_string_message);
2781 batch_count = tp->batch_max;
2785 /* Until we reach the batch_max limit, pick off addresses which have the
2786 same characteristics. These are:
2789 not previously delivered (see comment about 50 lines above)
2790 same local part if the transport's configuration contains $local_part
2791 or if this is a file or pipe delivery from a redirection
2792 same domain if the transport's configuration contains $domain
2794 same additional headers
2795 same headers to be removed
2796 same uid/gid for running the transport
2797 same first host if a host list is set
2800 while ((next = *anchor) && batch_count < tp->batch_max)
2803 tp == next->transport
2804 && !previously_transported(next, TRUE)
2805 && testflag(addr, af_pfr) == testflag(next, af_pfr)
2806 && testflag(addr, af_file) == testflag(next, af_file)
2807 && (!uses_lp || Ustrcmp(next->local_part, addr->local_part) == 0)
2808 && (!uses_dom || Ustrcmp(next->domain, addr->domain) == 0)
2809 && same_strings(next->prop.errors_address, addr->prop.errors_address)
2810 && same_headers(next->prop.extra_headers, addr->prop.extra_headers)
2811 && same_strings(next->prop.remove_headers, addr->prop.remove_headers)
2812 && same_ugid(tp, addr, next)
2813 && ( !addr->host_list && !next->host_list
2816 && Ustrcmp(addr->host_list->name, next->host_list->name) == 0
2819 /* If the transport has a batch_id setting, batch_id will be non-NULL
2820 from the expansion outside the loop. Expand for this address and compare.
2821 Expansion failure makes this address ineligible for batching. */
2826 address_item *save_nextnext = next->next;
2827 next->next = NULL; /* Expansion for a single address */
2828 deliver_set_expansions(next);
2829 next->next = save_nextnext;
2830 bid = expand_string(tp->batch_id);
2831 deliver_set_expansions(NULL);
2834 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2835 "in %s transport (%s): %s", tp->name, next->address,
2836 expand_string_message);
2839 else ok = (Ustrcmp(batch_id, bid) == 0);
2842 /* Take address into batch if OK. */
2846 *anchor = next->next; /* Include the address */
2852 else anchor = &next->next; /* Skip the address */
2856 /* We now have one or more addresses that can be delivered in a batch. Check
2857 whether the transport is prepared to accept a message of this size. If not,
2858 fail them all forthwith. If the expansion fails, or does not yield an
2859 integer, defer delivery. */
2861 if (tp->message_size_limit)
2863 int rc = check_message_size(tp, addr);
2866 replicate_status(addr);
2870 post_process_one(addr, rc, logflags, EXIM_DTYPE_TRANSPORT, 0);
2873 continue; /* With next batch of addresses */
2877 /* If we are not running the queue, or if forcing, all deliveries will be
2878 attempted. Otherwise, we must respect the retry times for each address. Even
2879 when not doing this, we need to set up the retry key string, and determine
2880 whether a retry record exists, because after a successful delivery, a delete
2881 retry item must be set up. Keep the retry database open only for the duration
2882 of these checks, rather than for all local deliveries, because some local
2883 deliveries (e.g. to pipes) can take a substantial time. */
2885 if (!(dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE, TRUE)))
2886 DEBUG(D_deliver|D_retry|D_hints_lookup)
2887 debug_printf("no retry data available\n");
2893 BOOL ok = TRUE; /* to deliver this address */
2896 /* Set up the retry key to include the domain or not, and change its
2897 leading character from "R" to "T". Must make a copy before doing this,
2898 because the old key may be pointed to from a "delete" retry item after
2901 retry_key = string_copy(
2902 tp->retry_use_local_part ? addr2->address_retry_key :
2903 addr2->domain_retry_key);
2906 /* Inspect the retry data. If there is no hints file, delivery happens. */
2910 dbdata_retry *retry_record = dbfn_read(dbm_file, retry_key);
2912 /* If there is no retry record, delivery happens. If there is,
2913 remember it exists so it can be deleted after a successful delivery. */
2917 setflag(addr2, af_lt_retry_exists);
2919 /* A retry record exists for this address. If queue running and not
2920 forcing, inspect its contents. If the record is too old, or if its
2921 retry time has come, or if it has passed its cutoff time, delivery
2926 debug_printf("retry record exists: age=%s ",
2927 readconf_printtime(now - retry_record->time_stamp));
2928 debug_printf("(max %s)\n", readconf_printtime(retry_data_expire));
2929 debug_printf(" time to retry = %s expired = %d\n",
2930 readconf_printtime(retry_record->next_try - now),
2931 retry_record->expired);
2934 if (f.queue_running && !f.deliver_force)
2936 ok = (now - retry_record->time_stamp > retry_data_expire)
2937 || (now >= retry_record->next_try)
2938 || retry_record->expired;
2940 /* If we haven't reached the retry time, there is one more check
2941 to do, which is for the ultimate address timeout. */
2944 ok = retry_ultimate_address_timeout(retry_key, addr2->domain,
2948 else DEBUG(D_retry) debug_printf("no retry record exists\n");
2951 /* This address is to be delivered. Leave it on the chain. */
2956 addr2 = addr2->next;
2959 /* This address is to be deferred. Take it out of the chain, and
2960 post-process it as complete. Must take it out of the chain first,
2961 because post processing puts it on another chain. */
2965 address_item *this = addr2;
2966 this->message = US"Retry time not yet reached";
2967 this->basic_errno = ERRNO_LRETRY;
2968 addr2 = addr3 ? (addr3->next = addr2->next)
2969 : (addr = addr2->next);
2970 post_process_one(this, DEFER, logflags, EXIM_DTYPE_TRANSPORT, 0);
2974 if (dbm_file) dbfn_close(dbm_file);
2976 /* If there are no addresses left on the chain, they all deferred. Loop
2977 for the next set of addresses. */
2979 if (!addr) continue;
2981 /* If the transport is limited for parallellism, enforce that here.
2982 We use a hints DB entry, incremented here and decremented after
2983 the transport (and any shadow transport) completes. */
2985 if (tpt_parallel_check(tp, addr, &serialize_key))
2987 if (expand_string_message)
2989 logflags |= LOG_PANIC;
2993 post_process_one(addr, DEFER, logflags, EXIM_DTYPE_TRANSPORT, 0);
2994 } while ((addr = addr2));
2996 continue; /* Loop for the next set of addresses. */
3000 /* So, finally, we do have some addresses that can be passed to the
3001 transport. Before doing so, set up variables that are relevant to a
3004 deliver_set_expansions(addr);
3006 gettimeofday(&delivery_start, NULL);
3007 deliver_local(addr, FALSE);
3008 timesince(&deliver_time, &delivery_start);
3010 /* If a shadow transport (which must perforce be another local transport), is
3011 defined, and its condition is met, we must pass the message to the shadow
3012 too, but only those addresses that succeeded. We do this by making a new
3013 chain of addresses - also to keep the original chain uncontaminated. We must
3014 use a chain rather than doing it one by one, because the shadow transport may
3017 NOTE: if the condition fails because of a lookup defer, there is nothing we
3021 && ( !tp->shadow_condition
3022 || expand_check_condition(tp->shadow_condition, tp->name, US"transport")
3025 transport_instance *stp;
3026 address_item *shadow_addr = NULL;
3027 address_item **last = &shadow_addr;
3029 for (stp = transports; stp; stp = stp->next)
3030 if (Ustrcmp(stp->name, tp->shadow) == 0) break;
3033 log_write(0, LOG_MAIN|LOG_PANIC, "shadow transport \"%s\" not found ",
3036 /* Pick off the addresses that have succeeded, and make clones. Put into
3037 the shadow_message field a pointer to the shadow_message field of the real
3040 else for (addr2 = addr; addr2; addr2 = addr2->next)
3041 if (addr2->transport_return == OK)
3043 addr3 = store_get(sizeof(address_item), GET_UNTAINTED);
3046 addr3->shadow_message = US &addr2->shadow_message;
3047 addr3->transport = stp;
3048 addr3->transport_return = DEFER;
3049 addr3->return_filename = NULL;
3050 addr3->return_file = -1;
3052 last = &addr3->next;
3055 /* If we found any addresses to shadow, run the delivery, and stick any
3056 message back into the shadow_message field in the original. */
3060 int save_count = transport_count;
3062 DEBUG(D_deliver|D_transport)
3063 debug_printf(">>>>>>>>>>>>>>>> Shadow delivery >>>>>>>>>>>>>>>>\n");
3064 deliver_local(shadow_addr, TRUE);
3066 for(; shadow_addr; shadow_addr = shadow_addr->next)
3068 int sresult = shadow_addr->transport_return;
3069 *(uschar **)shadow_addr->shadow_message =
3071 ? string_sprintf(" ST=%s", stp->name)
3072 : string_sprintf(" ST=%s (%s%s%s)", stp->name,
3073 shadow_addr->basic_errno <= 0
3075 : US strerror(shadow_addr->basic_errno),
3076 shadow_addr->basic_errno <= 0 || !shadow_addr->message
3079 shadow_addr->message
3080 ? shadow_addr->message
3081 : shadow_addr->basic_errno <= 0
3085 DEBUG(D_deliver|D_transport)
3086 debug_printf("%s shadow transport returned %s for %s\n",
3087 stp->name, rc_to_string(sresult), shadow_addr->address);
3090 DEBUG(D_deliver|D_transport)
3091 debug_printf(">>>>>>>>>>>>>>>> End shadow delivery >>>>>>>>>>>>>>>>\n");
3093 transport_count = save_count; /* Restore original transport count */
3097 /* Cancel the expansions that were set up for the delivery. */
3099 deliver_set_expansions(NULL);
3101 /* If the transport was parallelism-limited, decrement the hints DB record. */
3103 if (serialize_key) enq_end(serialize_key);
3105 /* Now we can process the results of the real transport. We must take each
3106 address off the chain first, because post_process_one() puts it on another
3109 for (addr2 = addr; addr2; addr2 = nextaddr)
3111 int result = addr2->transport_return;
3112 nextaddr = addr2->next;
3114 DEBUG(D_deliver|D_transport)
3115 debug_printf("%s transport returned %s for %s\n",
3116 tp->name, rc_to_string(result), addr2->address);
3118 /* If there is a retry_record, or if delivery is deferred, build a retry
3119 item for setting a new retry time or deleting the old retry record from
3120 the database. These items are handled all together after all addresses
3121 have been handled (so the database is open just for a short time for
3124 if (result == DEFER || testflag(addr2, af_lt_retry_exists))
3126 int flags = result == DEFER ? 0 : rf_delete;
3127 uschar *retry_key = string_copy(tp->retry_use_local_part
3128 ? addr2->address_retry_key : addr2->domain_retry_key);
3130 retry_add_item(addr2, retry_key, flags);
3133 /* Done with this address */
3135 addr2->delivery_time = deliver_time;
3136 post_process_one(addr2, result, logflags, EXIM_DTYPE_TRANSPORT, logchar);
3138 /* If a pipe delivery generated text to be sent back, the result may be
3139 changed to FAIL, and we must copy this for subsequent addresses in the
3142 if (addr2->transport_return != result)
3144 for (addr3 = nextaddr; addr3; addr3 = addr3->next)
3146 addr3->transport_return = addr2->transport_return;
3147 addr3->basic_errno = addr2->basic_errno;
3148 addr3->message = addr2->message;
3150 result = addr2->transport_return;
3153 /* Whether or not the result was changed to FAIL, we need to copy the
3154 return_file value from the first address into all the addresses of the
3155 batch, so they are all listed in the error message. */
3157 addr2->return_file = addr->return_file;
3159 /* Change log character for recording successful deliveries. */
3161 if (result == OK) logchar = '-';
3163 } /* Loop back for next batch of addresses */
3169 /*************************************************
3170 * Sort remote deliveries *
3171 *************************************************/
3173 /* This function is called if remote_sort_domains is set. It arranges that the
3174 chain of addresses for remote deliveries is ordered according to the strings
3175 specified. Try to make this shuffling reasonably efficient by handling
3176 sequences of addresses rather than just single ones.
3183 sort_remote_deliveries(void)
3186 address_item **aptr = &addr_remote;
3187 const uschar *listptr = remote_sort_domains;
3191 /*XXX The list is used before expansion. Not sure how that ties up with the docs */
3193 && (pattern = string_nextinlist(&listptr, &sep, patbuf, sizeof(patbuf)))
3196 address_item *moved = NULL;
3197 address_item **bptr = &moved;
3201 address_item **next;
3202 deliver_domain = (*aptr)->domain; /* set $domain */
3203 if (match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1,
3204 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK)
3206 aptr = &(*aptr)->next;
3210 next = &(*aptr)->next;
3212 && (deliver_domain = (*next)->domain, /* Set $domain */
3213 match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1,
3214 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL)) != OK
3216 next = &(*next)->next;
3218 /* If the batch of non-matchers is at the end, add on any that were
3219 extracted further up the chain, and end this iteration. Otherwise,
3220 extract them from the chain and hang on the moved chain. */
3232 aptr = &(*aptr)->next;
3235 /* If the loop ended because the final address matched, *aptr will
3236 be NULL. Add on to the end any extracted non-matching addresses. If
3237 *aptr is not NULL, the loop ended via "break" when *next is null, that
3238 is, there was a string of non-matching addresses at the end. In this
3239 case the extracted addresses have already been added on the end. */
3241 if (!*aptr) *aptr = moved;
3246 debug_printf("remote addresses after sorting:\n");
3247 for (address_item * addr = addr_remote; addr; addr = addr->next)
3248 debug_printf(" %s\n", addr->address);
3254 /*************************************************
3255 * Read from pipe for remote delivery subprocess *
3256 *************************************************/
3258 /* This function is called when the subprocess is complete, but can also be
3259 called before it is complete, in order to empty a pipe that is full (to prevent
3260 deadlock). It must therefore keep track of its progress in the parlist data
3263 We read the pipe to get the delivery status codes and a possible error message
3264 for each address, optionally preceded by unusability data for the hosts and
3265 also by optional retry data.
3267 Read in large chunks into the big buffer and then scan through, interpreting
3268 the data therein. In most cases, only a single read will be necessary. No
3269 individual item will ever be anywhere near 2500 bytes in length, so by ensuring
3270 that we read the next chunk when there is less than 2500 bytes left in the
3271 non-final chunk, we can assume each item is complete in the buffer before
3272 handling it. Each item is written using a single write(), which is atomic for
3273 small items (less than PIPE_BUF, which seems to be at least 512 in any Unix and
3274 often bigger) so even if we are reading while the subprocess is still going, we
3275 should never have only a partial item in the buffer.
3277 hs12: This assumption is not true anymore, since we get quite large items (certificate
3278 information and such).
3281 poffset the offset of the parlist item
3282 eop TRUE if the process has completed
3284 Returns: TRUE if the terminating 'Z' item has been read,
3285 or there has been a disaster (i.e. no more data needed);
3290 par_read_pipe(int poffset, BOOL eop)
3293 pardata *p = parlist + poffset;
3294 address_item *addrlist = p->addrlist;
3295 address_item *addr = p->addr;
3299 uschar *msg = p->msg;
3300 BOOL done = p->done;
3302 /* Loop through all items, reading from the pipe when necessary. The pipe
3303 used to be non-blocking. But I do not see a reason for using non-blocking I/O
3304 here, as the preceding poll() tells us, if data is available for reading.
3306 A read() on a "selected" handle should never block, but(!) it may return
3307 less data then we expected. (The buffer size we pass to read() shouldn't be
3308 understood as a "request", but as a "limit".)
3310 Each separate item is written to the pipe in a timely manner. But, especially for
3311 larger items, the read(2) may already return partial data from the write(2).
3313 The write is atomic mostly (depending on the amount written), but atomic does
3314 not imply "all or noting", it just is "not intermixed" with other writes on the
3315 same channel (pipe).
3319 DEBUG(D_deliver) debug_printf("reading pipe for subprocess %d (%s)\n",
3320 (int)p->pid, eop? "ended" : "not ended yet");
3324 retry_item *r, **rp;
3325 uschar pipeheader[PIPE_HEADER_SIZE+1];
3326 uschar *id = &pipeheader[0];
3327 uschar *subid = &pipeheader[1];
3328 uschar *ptr = big_buffer;
3329 size_t required = PIPE_HEADER_SIZE; /* first the pipehaeder, later the data */
3332 DEBUG(D_deliver) debug_printf(
3333 "expect %lu bytes (pipeheader) from tpt process %d\n", (u_long)required, pid);
3335 /* We require(!) all the PIPE_HEADER_SIZE bytes here, as we know,
3336 they're written in a timely manner, so waiting for the write shouldn't hurt a lot.
3337 If we get less, we can assume the subprocess do be done and do not expect any further
3338 information from it. */
3340 if ((got = readn(fd, pipeheader, required)) != required)
3342 msg = string_sprintf("got " SSIZE_T_FMT " of %d bytes (pipeheader) "
3343 "from transport process %d for transport %s",
3344 got, PIPE_HEADER_SIZE, pid, addr->transport->driver_name);
3349 pipeheader[PIPE_HEADER_SIZE] = '\0';
3351 debug_printf("got %ld bytes (pipeheader) from transport process %d\n",
3355 /* If we can't decode the pipeheader, the subprocess seems to have a
3356 problem, we do not expect any furher information from it. */
3358 required = Ustrtol(pipeheader+2, &endc, 10);
3361 msg = string_sprintf("failed to read pipe "
3362 "from transport process %d for transport %s: error decoding size from header",
3363 pid, addr->transport->driver_name);
3370 debug_printf("expect %lu bytes (pipedata) from transport process %d\n",
3371 (u_long)required, pid);
3373 /* Same as above, the transport process will write the bytes announced
3374 in a timely manner, so we can just wait for the bytes, getting less than expected
3375 is considered a problem of the subprocess, we do not expect anything else from it. */
3376 if ((got = readn(fd, big_buffer, required)) != required)
3378 msg = string_sprintf("got only " SSIZE_T_FMT " of " SIZE_T_FMT
3379 " bytes (pipedata) from transport process %d for transport %s",
3380 got, required, pid, addr->transport->driver_name);
3385 /* Handle each possible type of item, assuming the complete item is
3386 available in store. */
3390 /* Host items exist only if any hosts were marked unusable. Match
3391 up by checking the IP address. */
3394 for (h = addrlist->host_list; h; h = h->next)
3396 if (!h->address || Ustrcmp(h->address, ptr+2) != 0) continue;
3404 /* Retry items are sent in a preceding R item for each address. This is
3405 kept separate to keep each message short enough to guarantee it won't
3406 be split in the pipe. Hopefully, in the majority of cases, there won't in
3407 fact be any retry items at all.
3409 The complete set of retry items might include an item to delete a
3410 routing retry if there was a previous routing delay. However, routing
3411 retries are also used when a remote transport identifies an address error.
3412 In that case, there may also be an "add" item for the same key. Arrange
3413 that a "delete" item is dropped in favour of an "add" item. */
3416 if (!addr) goto ADDR_MISMATCH;
3418 DEBUG(D_deliver|D_retry)
3419 debug_printf("reading retry information for %s from subprocess\n",
3422 /* Cut out any "delete" items on the list. */
3424 for (rp = &addr->retries; (r = *rp); rp = &r->next)
3425 if (Ustrcmp(r->key, ptr+1) == 0) /* Found item with same key */
3427 if (!(r->flags & rf_delete)) break; /* It was not "delete" */
3428 *rp = r->next; /* Excise a delete item */
3429 DEBUG(D_deliver|D_retry)
3430 debug_printf(" existing delete item dropped\n");
3433 /* We want to add a delete item only if there is no non-delete item;
3434 however we still have to step ptr through the data. */
3436 if (!r || !(*ptr & rf_delete))
3438 r = store_get(sizeof(retry_item), GET_UNTAINTED);
3439 r->next = addr->retries;
3442 r->key = string_copy(ptr);
3444 memcpy(&r->basic_errno, ptr, sizeof(r->basic_errno));
3445 ptr += sizeof(r->basic_errno);
3446 memcpy(&r->more_errno, ptr, sizeof(r->more_errno));
3447 ptr += sizeof(r->more_errno);
3448 r->message = *ptr ? string_copy(ptr) : NULL;
3449 DEBUG(D_deliver|D_retry) debug_printf(" added %s item\n",
3450 r->flags & rf_delete ? "delete" : "retry");
3455 DEBUG(D_deliver|D_retry)
3456 debug_printf(" delete item not added: non-delete item exists\n");
3459 ptr += sizeof(r->basic_errno) + sizeof(r->more_errno);
3465 /* Put the amount of data written into the parlist block */
3468 memcpy(&(p->transport_count), ptr, sizeof(transport_count));
3469 ptr += sizeof(transport_count);
3472 /* Address items are in the order of items on the address chain. We
3473 remember the current address value in case this function is called
3474 several times to empty the pipe in stages. Information about delivery
3475 over TLS is sent in a preceding X item for each address. We don't put
3476 it in with the other info, in order to keep each message short enough to
3477 guarantee it won't be split in the pipe. */
3481 if (!addr) goto ADDR_MISMATCH; /* Below, in 'A' handler */
3485 addr->tlsver = addr->cipher = addr->peerdn = NULL;
3489 addr->cipher = string_copy(ptr);
3490 addr->tlsver = string_copyn(ptr, Ustrchr(ptr, ':') - ptr);
3494 addr->peerdn = string_copy(ptr);
3499 (void) tls_import_cert(ptr, &addr->peercert);
3501 addr->peercert = NULL;
3506 (void) tls_import_cert(ptr, &addr->ourcert);
3508 addr->ourcert = NULL;
3511 # ifndef DISABLE_OCSP
3513 addr->ocsp = *ptr ? *ptr - '0' : OCSP_NOT_REQ;
3519 #endif /*DISABLE_TLS*/
3521 case 'C': /* client authenticator information */
3524 case '1': addr->authenticator = *ptr ? string_copy(ptr) : NULL; break;
3525 case '2': addr->auth_id = *ptr ? string_copy(ptr) : NULL; break;
3526 case '3': addr->auth_sndr = *ptr ? string_copy(ptr) : NULL; break;
3531 #ifndef DISABLE_PRDR
3533 setflag(addr, af_prdr_used);
3540 #ifndef DISABLE_PIPE_CONNECT
3541 case 2: setflag(addr, af_early_pipe); /*FALLTHROUGH*/
3543 case 1: setflag(addr, af_pipelining); break;
3548 setflag(addr, af_chunking_used);
3552 setflag(addr, af_tcp_fastopen_conn);
3553 if (*subid > '0') setflag(addr, af_tcp_fastopen);
3554 if (*subid > '1') setflag(addr, af_tcp_fastopen_data);
3558 if (!addr) goto ADDR_MISMATCH;
3559 memcpy(&(addr->dsn_aware), ptr, sizeof(addr->dsn_aware));
3560 ptr += sizeof(addr->dsn_aware);
3561 DEBUG(D_deliver) debug_printf("DSN read: addr->dsn_aware = %d\n", addr->dsn_aware);
3568 msg = string_sprintf("address count mismatch for data read from pipe "
3569 "for transport process %d for transport %s", pid,
3570 addrlist->transport->driver_name);
3577 case 3: /* explicit notification of continued-connection (non)use;
3578 overrides caller's knowlege. */
3579 if (*ptr & BIT(1)) setflag(addr, af_new_conn);
3580 else if (*ptr & BIT(2)) setflag(addr, af_cont_conn);
3583 #ifdef SUPPORT_SOCKS
3584 case '2': /* proxy information; must arrive before A0 and applies to that addr XXX oops*/
3585 proxy_session = TRUE; /*XXX should this be cleared somewhere? */
3590 proxy_local_address = string_copy(ptr);
3592 memcpy(&proxy_local_port, ptr, sizeof(proxy_local_port));
3593 ptr += sizeof(proxy_local_port);
3598 #ifdef EXPERIMENTAL_DSN_INFO
3599 case '1': /* must arrive before A0, and applies to that addr */
3600 /* Two strings: smtp_greeting and helo_response */
3601 addr->smtp_greeting = string_copy(ptr);
3603 addr->helo_response = string_copy(ptr);
3609 DEBUG(D_deliver) debug_printf("A0 %s tret %d\n", addr->address, *ptr);
3610 addr->transport_return = *ptr++;
3611 addr->special_action = *ptr++;
3612 memcpy(&addr->basic_errno, ptr, sizeof(addr->basic_errno));
3613 ptr += sizeof(addr->basic_errno);
3614 memcpy(&addr->more_errno, ptr, sizeof(addr->more_errno));
3615 ptr += sizeof(addr->more_errno);
3616 memcpy(&addr->delivery_time, ptr, sizeof(addr->delivery_time));
3617 ptr += sizeof(addr->delivery_time);
3618 memcpy(&addr->flags, ptr, sizeof(addr->flags));
3619 ptr += sizeof(addr->flags);
3620 addr->message = *ptr ? string_copy(ptr) : NULL;
3622 addr->user_message = *ptr ? string_copy(ptr) : NULL;
3625 /* Always two strings for host information, followed by the port number and DNSSEC mark */
3629 h = store_get(sizeof(host_item), GET_UNTAINTED);
3630 h->name = string_copy(ptr);
3632 h->address = string_copy(ptr);
3634 memcpy(&h->port, ptr, sizeof(h->port));
3635 ptr += sizeof(h->port);
3636 h->dnssec = *ptr == '2' ? DS_YES
3637 : *ptr == '1' ? DS_NO
3640 addr->host_used = h;
3644 /* Finished with this address */
3651 /* Local interface address/port */
3653 if (*ptr) sending_ip_address = string_copy(ptr);
3655 if (*ptr) sending_port = atoi(CS ptr);
3659 /* Z marks the logical end of the data. It is followed by '0' if
3660 continue_transport was NULL at the end of transporting, otherwise '1'.
3661 We need to know when it becomes NULL during a delivery down a passed SMTP
3662 channel so that we don't try to pass anything more down it. Of course, for
3663 most normal messages it will remain NULL all the time. */
3668 continue_transport = NULL;
3669 continue_hostname = NULL;
3672 DEBUG(D_deliver) debug_printf("Z0%c item read\n", *ptr);
3675 /* Anything else is a disaster. */
3678 msg = string_sprintf("malformed data (%d) read from pipe for transport "
3679 "process %d for transport %s", ptr[-1], pid,
3680 addr->transport->driver_name);
3686 /* The done flag is inspected externally, to determine whether or not to
3687 call the function again when the process finishes. */
3691 /* If the process hadn't finished, and we haven't seen the end of the data
3692 or if we suffered a disaster, update the rest of the state, and return FALSE to
3693 indicate "not finished". */
3702 /* Close our end of the pipe, to prevent deadlock if the far end is still
3703 pushing stuff into it. */
3708 /* If we have finished without error, but haven't had data for every address,
3709 something is wrong. */
3712 msg = string_sprintf("insufficient address data read from pipe "
3713 "for transport process %d for transport %s", pid,
3714 addr->transport->driver_name);
3716 /* If an error message is set, something has gone wrong in getting back
3717 the delivery data. Put the message into each address and freeze it. */
3720 for (addr = addrlist; addr; addr = addr->next)
3722 addr->transport_return = DEFER;
3723 addr->special_action = SPECIAL_FREEZE;
3724 addr->message = msg;
3725 log_write(0, LOG_MAIN|LOG_PANIC, "Delivery status for %s: %s\n", addr->address, addr->message);
3728 /* Return TRUE to indicate we have got all we need from this process, even
3729 if it hasn't actually finished yet. */
3736 /*************************************************
3737 * Post-process a set of remote addresses *
3738 *************************************************/
3740 /* Do what has to be done immediately after a remote delivery for each set of
3741 addresses, then re-write the spool if necessary. Note that post_process_one
3742 puts the address on an appropriate queue; hence we must fish off the next
3743 one first. This function is also called if there is a problem with setting
3744 up a subprocess to do a remote delivery in parallel. In this case, the final
3745 argument contains a message, and the action must be forced to DEFER.
3748 addr pointer to chain of address items
3749 logflags flags for logging
3750 msg NULL for normal cases; -> error message for unexpected problems
3751 fallback TRUE if processing fallback hosts
3757 remote_post_process(address_item *addr, int logflags, uschar *msg,
3760 /* If any host addresses were found to be unusable, add them to the unusable
3761 tree so that subsequent deliveries don't try them. */
3763 for (host_item * h = addr->host_list; h; h = h->next)
3765 if (h->status >= hstatus_unusable) tree_add_unusable(h);
3767 /* Now handle each address on the chain. The transport has placed '=' or '-'
3768 into the special_action field for each successful delivery. */
3772 address_item *next = addr->next;
3774 /* If msg == NULL (normal processing) and the result is DEFER and we are
3775 processing the main hosts and there are fallback hosts available, put the
3776 address on the list for fallback delivery. */
3778 if ( addr->transport_return == DEFER
3779 && addr->fallback_hosts
3784 addr->host_list = addr->fallback_hosts;
3785 addr->next = addr_fallback;
3786 addr_fallback = addr;
3787 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", addr->address);
3790 /* If msg is set (=> unexpected problem), set it in the address before
3791 doing the ordinary post processing. */
3797 addr->message = msg;
3798 addr->transport_return = DEFER;
3800 (void)post_process_one(addr, addr->transport_return, logflags,
3801 EXIM_DTYPE_TRANSPORT, addr->special_action);
3809 /* If we have just delivered down a passed SMTP channel, and that was
3810 the last address, the channel will have been closed down. Now that
3811 we have logged that delivery, set continue_sequence to 1 so that
3812 any subsequent deliveries don't get "*" incorrectly logged. */
3814 if (!continue_transport) continue_sequence = 1;
3819 /*************************************************
3820 * Wait for one remote delivery subprocess *
3821 *************************************************/
3823 /* This function is called while doing remote deliveries when either the
3824 maximum number of processes exist and we need one to complete so that another
3825 can be created, or when waiting for the last ones to complete. It must wait for
3826 the completion of one subprocess, empty the control block slot, and return a
3827 pointer to the address chain.
3830 Returns: pointer to the chain of addresses handled by the process;
3831 NULL if no subprocess found - this is an unexpected error
3834 static address_item *
3837 int poffset, status;
3838 address_item * addr, * addrlist;
3841 set_process_info("delivering %s: waiting for a remote delivery subprocess "
3842 "to finish", message_id);
3844 /* Loop until either a subprocess completes, or there are no subprocesses in
3845 existence - in which case give an error return. We cannot proceed just by
3846 waiting for a completion, because a subprocess may have filled up its pipe, and
3847 be waiting for it to be emptied. Therefore, if no processes have finished, we
3848 wait for one of the pipes to acquire some data by calling poll(), with a
3849 timeout just in case.
3851 The simple approach is just to iterate after reading data from a ready pipe.
3852 This leads to non-ideal behaviour when the subprocess has written its final Z
3853 item, closed the pipe, and is in the process of exiting (the common case). A
3854 call to waitpid() yields nothing completed, but poll() shows the pipe ready -
3855 reading it yields EOF, so you end up with busy-waiting until the subprocess has
3858 To avoid this, if all the data that is needed has been read from a subprocess
3859 after poll(), an explicit wait() for it is done. We know that all it is doing
3860 is writing to the pipe and then exiting, so the wait should not be long.
3862 The non-blocking waitpid() is to some extent just insurance; if we could
3863 reliably detect end-of-file on the pipe, we could always know when to do a
3864 blocking wait() for a completed process. However, because some systems use
3865 NDELAY, which doesn't distinguish between EOF and pipe empty, it is easier to
3866 use code that functions without the need to recognize EOF.
3868 There's a double loop here just in case we end up with a process that is not in
3869 the list of remote delivery processes. Something has obviously gone wrong if
3870 this is the case. (For example, a process that is incorrectly left over from
3871 routing or local deliveries might be found.) The damage can be minimized by
3872 looping back and looking for another process. If there aren't any, the error
3873 return will happen. */
3875 for (;;) /* Normally we do not repeat this loop */
3877 while ((pid = waitpid(-1, &status, WNOHANG)) <= 0)
3881 /* A return value of -1 can mean several things. If errno != ECHILD, it
3882 either means invalid options (which we discount), or that this process was
3883 interrupted by a signal. Just loop to try the waitpid() again.
3885 If errno == ECHILD, waitpid() is telling us that there are no subprocesses
3886 in existence. This should never happen, and is an unexpected error.
3887 However, there is a nasty complication when running under Linux. If "strace
3888 -f" is being used under Linux to trace this process and its children,
3889 subprocesses are "stolen" from their parents and become the children of the
3890 tracing process. A general wait such as the one we've just obeyed returns
3891 as if there are no children while subprocesses are running. Once a
3892 subprocess completes, it is restored to the parent, and waitpid(-1) finds
3893 it. Thanks to Joachim Wieland for finding all this out and suggesting a
3896 This does not happen using "truss" on Solaris, nor (I think) with other
3897 tracing facilities on other OS. It seems to be specific to Linux.
3899 What we do to get round this is to use kill() to see if any of our
3900 subprocesses are still in existence. If kill() gives an OK return, we know
3901 it must be for one of our processes - it can't be for a re-use of the pid,
3902 because if our process had finished, waitpid() would have found it. If any
3903 of our subprocesses are in existence, we proceed to use poll() as if
3904 waitpid() had returned zero. I think this is safe. */
3908 if (errno != ECHILD) continue; /* Repeats the waitpid() */
3911 debug_printf("waitpid() returned -1/ECHILD: checking explicitly "
3912 "for process existence\n");
3914 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3916 if ((pid = parlist[poffset].pid) != 0 && kill(pid, 0) == 0)
3918 DEBUG(D_deliver) debug_printf("process %d still exists: assume "
3919 "stolen by strace\n", (int)pid);
3920 break; /* With poffset set */
3924 if (poffset >= remote_max_parallel)
3926 DEBUG(D_deliver) debug_printf("*** no delivery children found\n");
3927 return NULL; /* This is the error return */
3931 /* A pid value greater than 0 breaks the "while" loop. A negative value has
3932 been handled above. A return value of zero means that there is at least one
3933 subprocess, but there are no completed subprocesses. See if any pipes are
3934 ready with any data for reading. */
3936 DEBUG(D_deliver) debug_printf("polling subprocess pipes\n");
3938 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3939 if (parlist[poffset].pid != 0)
3941 parpoll[poffset].fd = parlist[poffset].fd;
3942 parpoll[poffset].events = POLLIN;
3945 parpoll[poffset].fd = -1;
3947 /* Stick in a 60-second timeout, just in case. */
3949 readycount = poll(parpoll, remote_max_parallel, 60 * 1000);
3951 /* Scan through the pipes and read any that are ready; use the count
3952 returned by poll() to stop when there are no more. Select() can return
3953 with no processes (e.g. if interrupted). This shouldn't matter.
3955 If par_read_pipe() returns TRUE, it means that either the terminating Z was
3956 read, or there was a disaster. In either case, we are finished with this
3957 process. Do an explicit wait() for the process and break the main loop if
3960 It turns out that we have to deal with the case of an interrupted system
3961 call, which can happen on some operating systems if the signal handling is
3962 set up to do that by default. */
3965 readycount > 0 && poffset < remote_max_parallel;
3968 if ( (pid = parlist[poffset].pid) != 0
3969 && parpoll[poffset].revents
3973 if (par_read_pipe(poffset, FALSE)) /* Finished with this pipe */
3974 for (;;) /* Loop for signals */
3976 pid_t endedpid = waitpid(pid, &status, 0);
3977 if (endedpid == pid) goto PROCESS_DONE;
3978 if (endedpid != (pid_t)(-1) || errno != EINTR)
3979 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Unexpected error return "
3980 "%d (errno = %d) from waitpid() for process %d",
3981 (int)endedpid, errno, (int)pid);
3986 /* Now go back and look for a completed subprocess again. */
3989 /* A completed process was detected by the non-blocking waitpid(). Find the
3990 data block that corresponds to this subprocess. */
3992 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3993 if (pid == parlist[poffset].pid) break;
3995 /* Found the data block; this is a known remote delivery process. We don't
3996 need to repeat the outer loop. This should be what normally happens. */
3998 if (poffset < remote_max_parallel) break;
4000 /* This situation is an error, but it's probably better to carry on looking
4001 for another process than to give up (as we used to do). */
4003 log_write(0, LOG_MAIN|LOG_PANIC, "Process %d finished: not found in remote "
4004 "transport process list", pid);
4005 } /* End of the "for" loop */
4007 /* Come here when all the data was completely read after a poll(), and
4008 the process in pid has been wait()ed for. */
4015 debug_printf("remote delivery process %d ended\n", (int)pid);
4017 debug_printf("remote delivery process %d ended: status=%04x\n", (int)pid,
4021 set_process_info("delivering %s", message_id);
4023 /* Get the chain of processed addresses */
4025 addrlist = parlist[poffset].addrlist;
4027 /* If the process did not finish cleanly, record an error and freeze (except
4028 for SIGTERM, SIGKILL and SIGQUIT), and also ensure the journal is not removed,
4029 in case the delivery did actually happen. */
4031 if ((status & 0xffff) != 0)
4034 int msb = (status >> 8) & 255;
4035 int lsb = status & 255;
4036 int code = (msb == 0)? (lsb & 0x7f) : msb;
4038 msg = string_sprintf("%s transport process returned non-zero status 0x%04x: "
4040 addrlist->transport->driver_name,
4042 msb == 0 ? "terminated by signal" : "exit code",
4045 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
4046 addrlist->special_action = SPECIAL_FREEZE;
4048 for (addr = addrlist; addr; addr = addr->next)
4050 addr->transport_return = DEFER;
4051 addr->message = msg;
4054 remove_journal = FALSE;
4057 /* Else complete reading the pipe to get the result of the delivery, if all
4058 the data has not yet been obtained. */
4060 else if (!parlist[poffset].done)
4061 (void) par_read_pipe(poffset, TRUE);
4063 /* Put the data count and return path into globals, mark the data slot unused,
4064 decrement the count of subprocesses, and return the address chain. */
4066 transport_count = parlist[poffset].transport_count;
4067 used_return_path = parlist[poffset].return_path;
4068 parlist[poffset].pid = 0;
4075 /*************************************************
4076 * Wait for subprocesses and post-process *
4077 *************************************************/
4079 /* This function waits for subprocesses until the number that are still running
4080 is below a given threshold. For each complete subprocess, the addresses are
4081 post-processed. If we can't find a running process, there is some shambles.
4082 Better not bomb out, as that might lead to multiple copies of the message. Just
4083 log and proceed as if all done.
4086 max maximum number of subprocesses to leave running
4087 fallback TRUE if processing fallback hosts
4093 par_reduce(int max, BOOL fallback)
4095 while (parcount > max)
4097 address_item *doneaddr = par_wait();
4100 log_write(0, LOG_MAIN|LOG_PANIC,
4101 "remote delivery process count got out of step");
4106 transport_instance * tp = doneaddr->transport;
4107 if (tp->max_parallel)
4108 enq_end(string_sprintf("tpt-serialize-%s", tp->name));
4110 remote_post_process(doneaddr, LOG_MAIN, NULL, fallback);
4116 rmt_dlv_checked_write(int fd, char id, char subid, void * buf, ssize_t size)
4118 uschar pipe_header[PIPE_HEADER_SIZE+1];
4119 size_t total_len = PIPE_HEADER_SIZE + size;
4121 struct iovec iov[2] = {
4122 { pipe_header, PIPE_HEADER_SIZE }, /* indication about the data to expect */
4123 { buf, size } /* *the* data */
4128 /* we assume that size can't get larger then BIG_BUFFER_SIZE which currently is set to 16k */
4129 /* complain to log if someone tries with buffer sizes we can't handle*/
4131 if (size > BIG_BUFFER_SIZE-1)
4133 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4134 "Failed writing transport result to pipe: can't handle buffers > %d bytes. truncating!\n",
4136 size = BIG_BUFFER_SIZE;
4139 /* Should we check that we do not write more than PIPE_BUF? What would
4142 /* convert size to human readable string prepended by id and subid */
4143 if (PIPE_HEADER_SIZE != snprintf(CS pipe_header, PIPE_HEADER_SIZE+1, "%c%c%05ld",
4144 id, subid, (long)size))
4145 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "header snprintf failed\n");
4147 DEBUG(D_deliver) debug_printf("header write id:%c,subid:%c,size:%ld,final:%s\n",
4148 id, subid, (long)size, pipe_header);
4150 if ((ret = writev(fd, iov, 2)) != total_len)
4151 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4152 "Failed writing transport result to pipe (%ld of %ld bytes): %s",
4153 (long)ret, (long)total_len, ret == -1 ? strerror(errno) : "short write");
4156 /*************************************************
4157 * Do remote deliveries *
4158 *************************************************/
4160 /* This function is called to process the addresses in addr_remote. We must
4161 pick off the queue all addresses that have the same transport, remote
4162 destination, and errors address, and hand them to the transport in one go,
4163 subject to some configured limitations. If this is a run to continue delivering
4164 to an existing delivery channel, skip all but those addresses that can go to
4165 that channel. The skipped addresses just get deferred.
4167 If mua_wrapper is set, all addresses must be able to be sent in a single
4168 transaction. If not, this function yields FALSE.
4170 In Exim 4, remote deliveries are always done in separate processes, even
4171 if remote_max_parallel = 1 or if there's only one delivery to do. The reason
4172 is so that the base process can retain privilege. This makes the
4173 implementation of fallback transports feasible (though not initially done.)
4175 We create up to the configured number of subprocesses, each of which passes
4176 back the delivery state via a pipe. (However, when sending down an existing
4177 connection, remote_max_parallel is forced to 1.)
4180 fallback TRUE if processing fallback hosts
4182 Returns: TRUE normally
4183 FALSE if mua_wrapper is set and the addresses cannot all be sent
4188 do_remote_deliveries(BOOL fallback)
4193 parcount = 0; /* Number of executing subprocesses */
4195 /* When sending down an existing channel, only do one delivery at a time.
4196 We use a local variable (parmax) to hold the maximum number of processes;
4197 this gets reduced from remote_max_parallel if we can't create enough pipes. */
4199 if (continue_transport) remote_max_parallel = 1;
4200 parmax = remote_max_parallel;
4202 /* If the data for keeping a list of processes hasn't yet been
4207 parlist = store_get(remote_max_parallel * sizeof(pardata), GET_UNTAINTED);
4208 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4209 parlist[poffset].pid = 0;
4210 parpoll = store_get(remote_max_parallel * sizeof(struct pollfd), GET_UNTAINTED);
4213 /* Now loop for each remote delivery */
4215 for (int delivery_count = 0; addr_remote; delivery_count++)
4221 int address_count = 1;
4222 int address_count_max;
4224 BOOL use_initgroups;
4225 BOOL pipe_done = FALSE;
4226 transport_instance *tp;
4227 address_item **anchor = &addr_remote;
4228 address_item *addr = addr_remote;
4229 address_item *last = addr;
4232 uschar * serialize_key = NULL;
4234 /* Pull the first address right off the list. */
4236 addr_remote = addr->next;
4239 DEBUG(D_deliver|D_transport)
4240 debug_printf("--------> %s <--------\n", addr->address);
4242 /* If no transport has been set, there has been a big screw-up somewhere. */
4244 if (!(tp = addr->transport))
4246 f.disable_logging = FALSE; /* Jic */
4247 panicmsg = US"No transport set by router";
4248 goto panic_continue;
4251 /* Check that this base address hasn't previously been delivered to this
4252 transport. The check is necessary at this point to handle homonymic addresses
4253 correctly in cases where the pattern of redirection changes between delivery
4254 attempts. Non-homonymic previous delivery is detected earlier, at routing
4257 if (previously_transported(addr, FALSE)) continue;
4259 /* Force failure if the message is too big. */
4261 if (tp->message_size_limit)
4263 int rc = check_message_size(tp, addr);
4266 addr->transport_return = rc;
4267 remote_post_process(addr, LOG_MAIN, NULL, fallback);
4272 /*XXX need to defeat this when DANE is used - but we don't know that yet.
4273 So look out for the place it gets used.
4276 /* Get the flag which specifies whether the transport can handle different
4277 domains that nevertheless resolve to the same set of hosts. If it needs
4278 expanding, get variables set: $address_data, $domain_data, $localpart_data,
4279 $host, $host_address, $host_port. */
4280 if (tp->expand_multi_domain)
4281 deliver_set_expansions(addr);
4283 if (exp_bool(addr, US"transport", tp->name, D_transport,
4284 US"multi_domain", tp->multi_domain, tp->expand_multi_domain,
4285 &multi_domain) != OK)
4287 deliver_set_expansions(NULL);
4288 panicmsg = addr->message;
4289 goto panic_continue;
4292 /* Get the maximum it can handle in one envelope, with zero meaning
4293 unlimited, which is forced for the MUA wrapper case. */
4295 address_count_max = tp->max_addresses;
4296 if (address_count_max == 0 || mua_wrapper) address_count_max = 999999;
4299 /************************************************************************/
4300 /***** This is slightly experimental code, but should be safe. *****/
4302 /* The address_count_max value is the maximum number of addresses that the
4303 transport can send in one envelope. However, the transport must be capable of
4304 dealing with any number of addresses. If the number it gets exceeds its
4305 envelope limitation, it must send multiple copies of the message. This can be
4306 done over a single connection for SMTP, so uses less resources than making
4307 multiple connections. On the other hand, if remote_max_parallel is greater
4308 than one, it is perhaps a good idea to use parallel processing to move the
4309 message faster, even if that results in multiple simultaneous connections to
4312 How can we come to some compromise between these two ideals? What we do is to
4313 limit the number of addresses passed to a single instance of a transport to
4314 the greater of (a) its address limit (rcpt_max for SMTP) and (b) the total
4315 number of addresses routed to remote transports divided by
4316 remote_max_parallel. For example, if the message has 100 remote recipients,
4317 remote max parallel is 2, and rcpt_max is 10, we'd never send more than 50 at
4318 once. But if rcpt_max is 100, we could send up to 100.
4320 Of course, not all the remotely addresses in a message are going to go to the
4321 same set of hosts (except in smarthost configurations), so this is just a
4322 heuristic way of dividing up the work.
4324 Furthermore (1), because this may not be wanted in some cases, and also to
4325 cope with really pathological cases, there is also a limit to the number of
4326 messages that are sent over one connection. This is the same limit that is
4327 used when sending several different messages over the same connection.
4328 Continue_sequence is set when in this situation, to the number sent so
4329 far, including this message.
4331 Furthermore (2), when somebody explicitly sets the maximum value to 1, it
4332 is probably because they are using VERP, in which case they want to pass only
4333 one address at a time to the transport, in order to be able to use
4334 $local_part and $domain in constructing a new return path. We could test for
4335 the use of these variables, but as it is so likely they will be used when the
4336 maximum is 1, we don't bother. Just leave the value alone. */
4338 if ( address_count_max != 1
4339 && address_count_max < remote_delivery_count/remote_max_parallel
4342 int new_max = remote_delivery_count/remote_max_parallel;
4343 int message_max = tp->connection_max_messages;
4344 if (connection_max_messages >= 0) message_max = connection_max_messages;
4345 message_max -= continue_sequence - 1;
4346 if (message_max > 0 && new_max > address_count_max * message_max)
4347 new_max = address_count_max * message_max;
4348 address_count_max = new_max;
4351 /************************************************************************/
4354 /*XXX don't know yet if DANE will be used. So tpt will have to
4355 check at the point if gets next addr from list, and skip/defer any
4359 /* Pick off all addresses which have the same transport, errors address,
4360 destination, and extra headers. In some cases they point to the same host
4361 list, but we also need to check for identical host lists generated from
4362 entirely different domains. The host list pointers can be NULL in the case
4363 where the hosts are defined in the transport. There is also a configured
4364 maximum limit of addresses that can be handled at once (see comments above
4365 for how it is computed).
4366 If the transport does not handle multiple domains, enforce that also,
4367 and if it might need a per-address check for this, re-evaluate it.
4370 while ((next = *anchor) && address_count < address_count_max)
4373 if ( (multi_domain || Ustrcmp(next->domain, addr->domain) == 0)
4374 && tp == next->transport
4375 && same_hosts(next->host_list, addr->host_list)
4376 && same_strings(next->prop.errors_address, addr->prop.errors_address)
4377 && same_headers(next->prop.extra_headers, addr->prop.extra_headers)
4378 && same_ugid(tp, next, addr)
4379 && ( next->prop.remove_headers == addr->prop.remove_headers
4380 || ( next->prop.remove_headers
4381 && addr->prop.remove_headers
4382 && Ustrcmp(next->prop.remove_headers, addr->prop.remove_headers) == 0
4386 (void)(!tp->expand_multi_domain || ((void)deliver_set_expansions(next), 1)),
4388 US"transport", next->transport->name, D_transport,
4389 US"multi_domain", next->transport->multi_domain,
4390 next->transport->expand_multi_domain, &md) == OK
4395 *anchor = next->next;
4397 next->first = addr; /* remember top one (for retry processing) */
4402 else anchor = &(next->next);
4403 deliver_set_expansions(NULL);
4406 /* If we are acting as an MUA wrapper, all addresses must go in a single
4407 transaction. If not, put them back on the chain and yield FALSE. */
4409 if (mua_wrapper && addr_remote)
4411 last->next = addr_remote;
4416 /* If the transport is limited for parallellism, enforce that here.
4417 The hints DB entry is decremented in par_reduce(), when we reap the
4418 transport process. */
4420 if (tpt_parallel_check(tp, addr, &serialize_key))
4421 if ((panicmsg = expand_string_message))
4422 goto panic_continue;
4424 continue; /* Loop for the next set of addresses. */
4426 /* Set up the expansion variables for this set of addresses */
4428 deliver_set_expansions(addr);
4430 /* Ensure any transport-set auth info is fresh */
4431 addr->authenticator = addr->auth_id = addr->auth_sndr = NULL;
4433 /* Compute the return path, expanding a new one if required. The old one
4434 must be set first, as it might be referred to in the expansion. */
4436 if(addr->prop.errors_address)
4437 return_path = addr->prop.errors_address;
4439 return_path = sender_address;
4441 if (tp->return_path)
4443 uschar *new_return_path = expand_string(tp->return_path);
4444 if (new_return_path)
4445 return_path = new_return_path;
4446 else if (!f.expand_string_forcedfail)
4448 panicmsg = string_sprintf("Failed to expand return path \"%s\": %s",
4449 tp->return_path, expand_string_message);
4454 /* Find the uid, gid, and use_initgroups setting for this transport. Failure
4455 logs and sets up error messages, so we just post-process and continue with
4456 the next address. */
4458 if (!findugid(addr, tp, &uid, &gid, &use_initgroups))
4464 /* If this transport has a setup function, call it now so that it gets
4465 run in this process and not in any subprocess. That way, the results of
4466 any setup that are retained by the transport can be reusable. One of the
4467 things the setup does is to set the fallback host lists in the addresses.
4468 That is why it is called at this point, before the continue delivery
4469 processing, because that might use the fallback hosts. */
4472 (void)((tp->setup)(addr->transport, addr, NULL, uid, gid, NULL));
4474 /* If we have a connection still open from a verify stage (lazy-close)
4475 treat it as if it is a continued connection (apart from the counter used
4476 for the log line mark). */
4478 if (cutthrough.cctx.sock >= 0 && cutthrough.callout_hold_only)
4481 debug_printf("lazy-callout-close: have conn still open from verification\n");
4482 continue_transport = cutthrough.transport;
4483 continue_hostname = string_copy(cutthrough.host.name);
4484 continue_host_address = string_copy(cutthrough.host.address);
4485 continue_sequence = 1;
4486 sending_ip_address = cutthrough.snd_ip;
4487 sending_port = cutthrough.snd_port;
4488 smtp_peer_options = cutthrough.peer_options;
4491 /* If this is a run to continue delivery down an already-established
4492 channel, check that this set of addresses matches the transport and
4493 the channel. If it does not, defer the addresses. If a host list exists,
4494 we must check that the continue host is on the list. Otherwise, the
4495 host is set in the transport. */
4497 f.continue_more = FALSE; /* In case got set for the last lot */
4498 if (continue_transport)
4500 BOOL ok = Ustrcmp(continue_transport, tp->name) == 0;
4501 /*XXX do we need to check for a DANEd conn vs. a change of domain? */
4503 /* If the transport is about to override the host list do not check
4504 it here but take the cost of running the transport process to discover
4505 if the continued_hostname connection is suitable. This is a layering
4506 violation which is unfortunate as it requires we haul in the smtp
4511 smtp_transport_options_block * ob;
4513 if ( !( Ustrcmp(tp->info->driver_name, "smtp") == 0
4514 && (ob = (smtp_transport_options_block *)tp->options_block)
4515 && ob->hosts_override && ob->hosts
4521 for (host_item * h = addr->host_list; h; h = h->next)
4522 if (Ustrcmp(h->name, continue_hostname) == 0)
4523 /*XXX should also check port here */
4524 { ok = TRUE; break; }
4528 /* Addresses not suitable; defer or queue for fallback hosts (which
4529 might be the continue host) and skip to next address. */
4533 DEBUG(D_deliver) debug_printf("not suitable for continue_transport (%s)\n",
4534 Ustrcmp(continue_transport, tp->name) != 0
4535 ? string_sprintf("tpt %s vs %s", continue_transport, tp->name)
4536 : string_sprintf("no host matching %s", continue_hostname));
4537 if (serialize_key) enq_end(serialize_key);
4539 if (addr->fallback_hosts && !fallback)
4541 for (next = addr; ; next = next->next)
4543 next->host_list = next->fallback_hosts;
4544 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", next->address);
4545 if (!next->next) break;
4547 next->next = addr_fallback;
4548 addr_fallback = addr;
4553 for (next = addr; ; next = next->next)
4555 DEBUG(D_deliver) debug_printf(" %s to def list\n", next->address);
4556 if (!next->next) break;
4558 next->next = addr_defer;
4565 /* Set a flag indicating whether there are further addresses that list
4566 the continued host. This tells the transport to leave the channel open,
4567 but not to pass it to another delivery process. We'd like to do that
4568 for non-continue_transport cases too but the knowlege of which host is
4569 connected to is too hard to manage. Perhaps we need a finer-grain
4570 interface to the transport. */
4572 for (next = addr_remote; next && !f.continue_more; next = next->next)
4573 for (host_item * h = next->host_list; h; h = h->next)
4574 if (Ustrcmp(h->name, continue_hostname) == 0)
4575 { f.continue_more = TRUE; break; }
4578 /* The transports set up the process info themselves as they may connect
4579 to more than one remote machine. They also have to set up the filter
4580 arguments, if required, so that the host name and address are available
4583 transport_filter_argv = NULL;
4585 /* Create the pipe for inter-process communication. If pipe creation
4586 fails, it is probably because the value of remote_max_parallel is so
4587 large that too many file descriptors for pipes have been created. Arrange
4588 to wait for a process to finish, and then try again. If we still can't
4589 create a pipe when all processes have finished, break the retry loop. */
4593 if (pipe(pfd) == 0) pipe_done = TRUE;
4594 else if (parcount > 0) parmax = parcount;
4597 /* We need to make the reading end of the pipe non-blocking. There are
4598 two different options for this. Exim is cunningly (I hope!) coded so
4599 that it can use either of them, though it prefers O_NONBLOCK, which
4600 distinguishes between EOF and no-more-data. */
4602 /* The data appears in a timely manner and we already did a poll on
4603 all pipes, so I do not see a reason to use non-blocking IO here
4606 (void)fcntl(pfd[pipe_read], F_SETFL, O_NONBLOCK);
4608 (void)fcntl(pfd[pipe_read], F_SETFL, O_NDELAY);
4612 /* If the maximum number of subprocesses already exist, wait for a process
4613 to finish. If we ran out of file descriptors, parmax will have been reduced
4614 from its initial value of remote_max_parallel. */
4616 par_reduce(parmax - 1, fallback);
4619 /* If we failed to create a pipe and there were no processes to wait
4620 for, we have to give up on this one. Do this outside the above loop
4621 so that we can continue the main loop. */
4625 panicmsg = string_sprintf("unable to create pipe: %s", strerror(errno));
4629 /* Find a free slot in the pardata list. Must do this after the possible
4630 waiting for processes to finish, because a terminating process will free
4633 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4634 if (parlist[poffset].pid == 0)
4637 /* If there isn't one, there has been a horrible disaster. */
4639 if (poffset >= remote_max_parallel)
4641 (void)close(pfd[pipe_write]);
4642 (void)close(pfd[pipe_read]);
4643 panicmsg = US"Unexpectedly no free subprocess slot";
4647 /* Now fork a subprocess to do the remote delivery, but before doing so,
4648 ensure that any cached resources are released so as not to interfere with
4649 what happens in the subprocess. */
4653 if ((pid = exim_fork(US"transport")) == 0)
4655 int fd = pfd[pipe_write];
4658 /* Setting these globals in the subprocess means we need never clear them */
4659 transport_name = addr->transport->name;
4660 driver_srcfile = tp->srcfile;
4661 driver_srcline = tp->srcline;
4663 /* There are weird circumstances in which logging is disabled */
4664 f.disable_logging = tp->disable_logging;
4666 /* Show pids on debug output if parallelism possible */
4668 if (parmax > 1 && (parcount > 0 || addr_remote))
4669 DEBUG(D_any|D_v) debug_selector |= D_pid;
4671 /* Reset the random number generator, so different processes don't all
4672 have the same sequence. In the test harness we want different, but
4673 predictable settings for each delivery process, so do something explicit
4674 here rather they rely on the fixed reset in the random number function. */
4676 random_seed = f.running_in_test_harness ? 42 + 2*delivery_count : 0;
4678 /* Set close-on-exec on the pipe so that it doesn't get passed on to
4679 a new process that may be forked to do another delivery down the same
4682 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
4684 /* Close open file descriptors for the pipes of other processes
4685 that are running in parallel. */
4687 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4688 if (parlist[poffset].pid != 0) (void)close(parlist[poffset].fd);
4690 /* This process has inherited a copy of the file descriptor
4691 for the data file, but its file pointer is shared with all the
4692 other processes running in parallel. Therefore, we have to re-open
4693 the file in order to get a new file descriptor with its own
4694 file pointer. We don't need to lock it, as the lock is held by
4695 the parent process. There doesn't seem to be any way of doing
4696 a dup-with-new-file-pointer. */
4698 (void)close(deliver_datafile);
4700 uschar * fname = spool_fname(US"input", message_subdir, message_id, US"-D");
4702 if ( (deliver_datafile = Uopen(fname, EXIM_CLOEXEC | O_RDWR | O_APPEND, 0))
4704 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to reopen %s for remote "
4705 "parallel delivery: %s", fname, strerror(errno));
4708 #ifndef O_CLOEXEC /* Set the close-on-exec flag */
4709 (void)fcntl(deliver_datafile, F_SETFD, fcntl(deliver_datafile, F_GETFD) |
4713 /* Set the uid/gid of this process; bombs out on failure. */
4715 exim_setugid(uid, gid, use_initgroups,
4716 string_sprintf("remote delivery to %s with transport=%s",
4717 addr->address, tp->name));
4719 /* Close the unwanted half of this process' pipe, set the process state,
4720 and run the transport. Afterwards, transport_count will contain the number
4721 of bytes written. */
4723 (void)close(pfd[pipe_read]);
4724 set_process_info("delivering %s using %s", message_id, tp->name);
4725 debug_print_string(tp->debug_string);
4726 if (!(tp->info->code)(addr->transport, addr)) replicate_status(addr);
4728 set_process_info("delivering %s (just run %s for %s%s in subprocess)",
4729 message_id, tp->name, addr->address, addr->next ? ", ..." : "");
4731 /* Ensure any cached resources that we used are now released */
4735 /* Pass the result back down the pipe. This is a lot more information
4736 than is needed for a local delivery. We have to send back the error
4737 status for each address, the usability status for each host that is
4738 flagged as unusable, and all the retry items. When TLS is in use, we
4739 send also the cipher and peerdn information. Each type of information
4740 is flagged by an identifying byte, and is then in a fixed format (with
4741 strings terminated by zeros), and there is a final terminator at the
4742 end. The host information and retry information is all attached to
4743 the first address, so that gets sent at the start. */
4745 /* Host unusability information: for most success cases this will
4748 for (h = addr->host_list; h; h = h->next)
4750 if (!h->address || h->status < hstatus_unusable) continue;
4751 sprintf(CS big_buffer, "%c%c%s", h->status, h->why, h->address);
4752 rmt_dlv_checked_write(fd, 'H', '0', big_buffer, Ustrlen(big_buffer+2) + 3);
4755 /* The number of bytes written. This is the same for each address. Even
4756 if we sent several copies of the message down the same connection, the
4757 size of each one is the same, and it's that value we have got because
4758 transport_count gets reset before calling transport_write_message(). */
4760 memcpy(big_buffer, &transport_count, sizeof(transport_count));
4761 rmt_dlv_checked_write(fd, 'S', '0', big_buffer, sizeof(transport_count));
4763 /* Information about what happened to each address. Four item types are
4764 used: an optional 'X' item first, for TLS information, then an optional "C"
4765 item for any client-auth info followed by 'R' items for any retry settings,
4766 and finally an 'A' item for the remaining data. */
4768 for(; addr; addr = addr->next)
4772 /* The certificate verification status goes into the flags */
4773 if (tls_out.certificate_verified) setflag(addr, af_cert_verified);
4775 if (tls_out.dane_verified) setflag(addr, af_dane_verified);
4777 # ifndef DISABLE_TLS_RESUME
4778 if (tls_out.resumption & RESUME_USED) setflag(addr, af_tls_resume);
4781 /* Use an X item only if there's something to send */
4785 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", addr->cipher) + 1;
4789 ptr += sprintf(CS ptr, "%.512s", addr->peerdn) + 1;
4791 rmt_dlv_checked_write(fd, 'X', '1', big_buffer, ptr - big_buffer);
4793 else if (continue_proxy_cipher)
4795 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", continue_proxy_cipher) + 1;
4797 rmt_dlv_checked_write(fd, 'X', '1', big_buffer, ptr - big_buffer);
4803 if (tls_export_cert(ptr, big_buffer_size-2, addr->peercert))
4807 rmt_dlv_checked_write(fd, 'X', '2', big_buffer, ptr - big_buffer);
4812 if (tls_export_cert(ptr, big_buffer_size-2, addr->ourcert))
4816 rmt_dlv_checked_write(fd, 'X', '3', big_buffer, ptr - big_buffer);
4818 # ifndef DISABLE_OCSP
4819 if (addr->ocsp > OCSP_NOT_REQ)
4821 ptr = big_buffer + sprintf(CS big_buffer, "%c", addr->ocsp + '0') + 1;
4822 rmt_dlv_checked_write(fd, 'X', '4', big_buffer, ptr - big_buffer);
4825 #endif /*DISABLE_TLS*/
4827 if (client_authenticator)
4829 ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticator) + 1;
4830 rmt_dlv_checked_write(fd, 'C', '1', big_buffer, ptr - big_buffer);
4832 if (client_authenticated_id)
4834 ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticated_id) + 1;
4835 rmt_dlv_checked_write(fd, 'C', '2', big_buffer, ptr - big_buffer);
4837 if (client_authenticated_sender)
4839 ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticated_sender) + 1;
4840 rmt_dlv_checked_write(fd, 'C', '3', big_buffer, ptr - big_buffer);
4843 #ifndef DISABLE_PRDR
4844 if (testflag(addr, af_prdr_used))
4845 rmt_dlv_checked_write(fd, 'P', '0', NULL, 0);
4848 if (testflag(addr, af_pipelining))
4849 #ifndef DISABLE_PIPE_CONNECT
4850 if (testflag(addr, af_early_pipe))
4851 rmt_dlv_checked_write(fd, 'L', '2', NULL, 0);
4854 rmt_dlv_checked_write(fd, 'L', '1', NULL, 0);
4856 if (testflag(addr, af_chunking_used))
4857 rmt_dlv_checked_write(fd, 'K', '0', NULL, 0);
4859 if (testflag(addr, af_tcp_fastopen_conn))
4860 rmt_dlv_checked_write(fd, 'T',
4861 testflag(addr, af_tcp_fastopen) ? testflag(addr, af_tcp_fastopen_data)
4865 memcpy(big_buffer, &addr->dsn_aware, sizeof(addr->dsn_aware));
4866 rmt_dlv_checked_write(fd, 'D', '0', big_buffer, sizeof(addr->dsn_aware));
4868 /* Retry information: for most success cases this will be null. */
4870 for (retry_item * r = addr->retries; r; r = r->next)
4872 sprintf(CS big_buffer, "%c%.500s", r->flags, r->key);
4873 ptr = big_buffer + Ustrlen(big_buffer+2) + 3;
4874 memcpy(ptr, &r->basic_errno, sizeof(r->basic_errno));
4875 ptr += sizeof(r->basic_errno);
4876 memcpy(ptr, &r->more_errno, sizeof(r->more_errno));
4877 ptr += sizeof(r->more_errno);
4878 if (!r->message) *ptr++ = 0; else
4880 sprintf(CS ptr, "%.512s", r->message);
4883 rmt_dlv_checked_write(fd, 'R', '0', big_buffer, ptr - big_buffer);
4886 if (testflag(addr, af_new_conn) || testflag(addr, af_cont_conn))
4888 DEBUG(D_deliver) debug_printf("%scontinued-connection\n",
4889 testflag(addr, af_new_conn) ? "non-" : "");
4890 big_buffer[0] = testflag(addr, af_new_conn) ? BIT(1) : BIT(2);
4891 rmt_dlv_checked_write(fd, 'A', '3', big_buffer, 1);
4894 #ifdef SUPPORT_SOCKS
4895 if (LOGGING(proxy) && proxy_session)
4898 if (proxy_local_address)
4900 DEBUG(D_deliver) debug_printf("proxy_local_address '%s'\n", proxy_local_address);
4901 ptr = big_buffer + sprintf(CS ptr, "%.128s", proxy_local_address) + 1;
4902 DEBUG(D_deliver) debug_printf("proxy_local_port %d\n", proxy_local_port);
4903 memcpy(ptr, &proxy_local_port, sizeof(proxy_local_port));
4904 ptr += sizeof(proxy_local_port);
4908 rmt_dlv_checked_write(fd, 'A', '2', big_buffer, ptr - big_buffer);
4912 #ifdef EXPERIMENTAL_DSN_INFO
4913 /*um, are they really per-addr? Other per-conn stuff is not (auth, tls). But host_used is! */
4914 if (addr->smtp_greeting)
4916 DEBUG(D_deliver) debug_printf("smtp_greeting '%s'\n", addr->smtp_greeting);
4917 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", addr->smtp_greeting) + 1;
4918 if (addr->helo_response)
4920 DEBUG(D_deliver) debug_printf("helo_response '%s'\n", addr->helo_response);
4921 ptr += sprintf(CS ptr, "%.128s", addr->helo_response) + 1;
4925 rmt_dlv_checked_write(fd, 'A', '1', big_buffer, ptr - big_buffer);
4929 /* The rest of the information goes in an 'A0' item. */
4931 sprintf(CS big_buffer, "%c%c", addr->transport_return, addr->special_action);
4932 ptr = big_buffer + 2;
4933 memcpy(ptr, &addr->basic_errno, sizeof(addr->basic_errno));
4934 ptr += sizeof(addr->basic_errno);
4935 memcpy(ptr, &addr->more_errno, sizeof(addr->more_errno));
4936 ptr += sizeof(addr->more_errno);
4937 memcpy(ptr, &addr->delivery_time, sizeof(addr->delivery_time));
4938 ptr += sizeof(addr->delivery_time);
4939 memcpy(ptr, &addr->flags, sizeof(addr->flags));
4940 ptr += sizeof(addr->flags);
4942 if (!addr->message) *ptr++ = 0; else
4943 ptr += sprintf(CS ptr, "%.1024s", addr->message) + 1;
4945 if (!addr->user_message) *ptr++ = 0; else
4946 ptr += sprintf(CS ptr, "%.1024s", addr->user_message) + 1;
4948 if (!addr->host_used) *ptr++ = 0; else
4950 ptr += sprintf(CS ptr, "%.256s", addr->host_used->name) + 1;
4951 ptr += sprintf(CS ptr, "%.64s", addr->host_used->address) + 1;
4952 memcpy(ptr, &addr->host_used->port, sizeof(addr->host_used->port));
4953 ptr += sizeof(addr->host_used->port);
4955 /* DNS lookup status */
4956 *ptr++ = addr->host_used->dnssec==DS_YES ? '2'
4957 : addr->host_used->dnssec==DS_NO ? '1' : '0';
4960 rmt_dlv_checked_write(fd, 'A', '0', big_buffer, ptr - big_buffer);
4963 /* Local interface address/port */
4964 #ifdef EXPERIMENTAL_DSN_INFO
4965 if (sending_ip_address)
4967 if (LOGGING(incoming_interface) && sending_ip_address)
4971 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", sending_ip_address) + 1;
4972 ptr += sprintf(CS ptr, "%d", sending_port) + 1;
4973 rmt_dlv_checked_write(fd, 'I', '0', big_buffer, ptr - big_buffer);
4976 /* Add termination flag, close the pipe, and that's it. The character
4977 after 'Z' indicates whether continue_transport is now NULL or not.
4978 A change from non-NULL to NULL indicates a problem with a continuing
4981 big_buffer[0] = continue_transport ? '1' : '0';
4982 rmt_dlv_checked_write(fd, 'Z', '0', big_buffer, 1);
4987 /* Back in the mainline: close the unwanted half of the pipe. */
4989 (void)close(pfd[pipe_write]);
4991 /* If we have a connection still open from a verify stage (lazy-close)
4992 release its TLS library context (if any) as responsibility was passed to
4993 the delivery child process. */
4995 if (cutthrough.cctx.sock >= 0 && cutthrough.callout_hold_only)
4998 if (cutthrough.is_tls)
4999 tls_close(cutthrough.cctx.tls_ctx, TLS_NO_SHUTDOWN);
5001 (void) close(cutthrough.cctx.sock);
5002 release_cutthrough_connection(US"passed to transport proc");
5005 /* Fork failed; defer with error message */
5009 (void)close(pfd[pipe_read]);
5010 panicmsg = string_sprintf("fork failed for remote delivery to %s: %s",
5011 addr->domain, strerror(errno));
5015 /* Fork succeeded; increment the count, and remember relevant data for
5016 when the process finishes. */
5019 parlist[poffset].addrlist = parlist[poffset].addr = addr;
5020 parlist[poffset].pid = pid;
5021 parlist[poffset].fd = pfd[pipe_read];
5022 parlist[poffset].done = FALSE;
5023 parlist[poffset].msg = NULL;
5024 parlist[poffset].return_path = return_path;
5026 /* If the process we've just started is sending a message down an existing
5027 channel, wait for it now. This ensures that only one such process runs at
5028 once, whatever the value of remote_max parallel. Otherwise, we might try to
5029 send two or more messages simultaneously down the same channel. This could
5030 happen if there are different domains that include the same host in otherwise
5031 different host lists.
5033 Also, if the transport closes down the channel, this information gets back
5034 (continue_transport gets set to NULL) before we consider any other addresses
5037 if (continue_transport) par_reduce(0, fallback);
5039 /* Otherwise, if we are running in the test harness, wait a bit, to let the
5040 newly created process get going before we create another process. This should
5041 ensure repeatability in the tests. Wait long enough for most cases to complete
5044 else testharness_pause_ms(600);
5049 if (serialize_key) enq_end(serialize_key);
5051 remote_post_process(addr, LOG_MAIN|LOG_PANIC, panicmsg, fallback);
5055 /* Reached the end of the list of addresses. Wait for all the subprocesses that
5056 are still running and post-process their addresses. */
5058 par_reduce(0, fallback);
5065 /*************************************************
5066 * Split an address into local part and domain *
5067 *************************************************/
5069 /* This function initializes an address for routing by splitting it up into a
5070 local part and a domain. The local part is set up twice - once in its original
5071 casing, and once in lower case, and it is dequoted. We also do the "percent
5072 hack" for configured domains. This may lead to a DEFER result if a lookup
5073 defers. When a percent-hacking takes place, we insert a copy of the original
5074 address as a new parent of this address, as if we have had a redirection.
5077 addr points to an addr_item block containing the address
5080 DEFER - could not determine if domain is %-hackable
5084 deliver_split_address(address_item * addr)
5086 uschar * address = addr->address;
5091 if (!(domain = Ustrrchr(address, '@')))
5092 return DEFER; /* should always have a domain, but just in case... */
5094 len = domain - address;
5095 addr->domain = string_copylc(domain+1); /* Domains are always caseless */
5097 /* The implication in the RFCs (though I can't say I've seen it spelled out
5098 explicitly) is that quoting should be removed from local parts at the point
5099 where they are locally interpreted. [The new draft "821" is more explicit on
5100 this, Jan 1999.] We know the syntax is valid, so this can be done by simply
5101 removing quoting backslashes and any unquoted doublequotes. */
5103 t = addr->cc_local_part = store_get(len+1, address);
5107 if (c == '\"') continue;
5117 /* We do the percent hack only for those domains that are listed in
5118 percent_hack_domains. A loop is required, to copy with multiple %-hacks. */
5120 if (percent_hack_domains)
5123 uschar *new_address = NULL;
5124 uschar *local_part = addr->cc_local_part;
5126 deliver_domain = addr->domain; /* set $domain */
5128 while ( (rc = match_isinlist(deliver_domain, (const uschar **)&percent_hack_domains, 0,
5129 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
5131 && (t = Ustrrchr(local_part, '%')) != NULL
5134 new_address = string_copy(local_part);
5135 new_address[t - local_part] = '@';
5136 deliver_domain = string_copylc(t+1);
5137 local_part = string_copyn(local_part, t - local_part);
5140 if (rc == DEFER) return DEFER; /* lookup deferred */
5142 /* If hackery happened, set up new parent and alter the current address. */
5146 address_item * new_parent = store_get(sizeof(address_item), GET_UNTAINTED);
5147 *new_parent = *addr;
5148 addr->parent = new_parent;
5149 new_parent->child_count = 1;
5150 addr->address = new_address;
5151 addr->unique = string_copy(new_address);
5152 addr->domain = deliver_domain;
5153 addr->cc_local_part = local_part;
5154 DEBUG(D_deliver) debug_printf("%%-hack changed address to: %s\n",
5159 /* Create the lowercased version of the final local part, and make that the
5160 default one to be used. */
5162 addr->local_part = addr->lc_local_part = string_copylc(addr->cc_local_part);
5169 /*************************************************
5170 * Get next error message text *
5171 *************************************************/
5173 /* If f is not NULL, read the next "paragraph", from a customized error message
5174 text file, terminated by a line containing ****, and expand it.
5177 f NULL or a file to read from
5178 which string indicating which string (for errors)
5180 Returns: NULL or an expanded string
5184 next_emf(FILE *f, uschar *which)
5190 if (!f) return NULL;
5192 if (!Ufgets(buffer, sizeof(buffer), f) || Ustrcmp(buffer, "****\n") == 0)
5195 para = string_get(256);
5198 para = string_cat(para, buffer);
5199 if (!Ufgets(buffer, sizeof(buffer), f) || Ustrcmp(buffer, "****\n") == 0)
5202 if ((yield = expand_string(string_from_gstring(para))))
5205 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand string from "
5206 "bounce_message_file or warn_message_file (%s): %s", which,
5207 expand_string_message);
5214 /*************************************************
5215 * Close down a passed transport channel *
5216 *************************************************/
5218 /* This function is called when a passed transport channel cannot be used.
5219 It attempts to close it down tidily. The yield is always DELIVER_NOT_ATTEMPTED
5220 so that the function call can be the argument of a "return" statement.
5223 Returns: DELIVER_NOT_ATTEMPTED
5227 continue_closedown(void)
5229 if (continue_transport)
5230 for (transport_instance * t = transports; t; t = t->next)
5231 if (Ustrcmp(t->name, continue_transport) == 0)
5233 if (t->info->closedown) (t->info->closedown)(t);
5236 return DELIVER_NOT_ATTEMPTED;
5242 /*************************************************
5243 * Print address information *
5244 *************************************************/
5246 /* This function is called to output an address, or information about an
5247 address, for bounce or defer messages. If the hide_child flag is set, all we
5248 output is the original ancestor address.
5251 addr points to the address
5252 f the FILE to print to
5253 si an initial string
5254 sc a continuation string for before "generated"
5257 Returns: TRUE if the address is not hidden
5261 print_address_information(address_item *addr, FILE *f, uschar *si, uschar *sc,
5265 uschar *printed = US"";
5266 address_item *ancestor = addr;
5267 while (ancestor->parent) ancestor = ancestor->parent;
5269 fprintf(f, "%s", CS si);
5271 if (addr->parent && testflag(addr, af_hide_child))
5273 printed = US"an undisclosed address";
5276 else if (!testflag(addr, af_pfr) || !addr->parent)
5277 printed = addr->address;
5281 uschar *s = addr->address;
5284 if (addr->address[0] == '>') { ss = US"mail"; s++; }
5285 else if (addr->address[0] == '|') ss = US"pipe";
5288 fprintf(f, "%s to %s%sgenerated by ", ss, s, sc);
5289 printed = addr->parent->address;
5292 fprintf(f, "%s", CS string_printing(printed));
5294 if (ancestor != addr)
5296 uschar *original = ancestor->onetime_parent;
5297 if (!original) original= ancestor->address;
5298 if (strcmpic(original, printed) != 0)
5299 fprintf(f, "%s(%sgenerated from %s)", sc,
5300 ancestor != addr->parent ? "ultimately " : "",
5301 string_printing(original));
5304 if (addr->host_used)
5305 fprintf(f, "\n host %s [%s]",
5306 addr->host_used->name, addr->host_used->address);
5308 fprintf(f, "%s", CS se);
5316 /*************************************************
5317 * Print error for an address *
5318 *************************************************/
5320 /* This function is called to print the error information out of an address for
5321 a bounce or a warning message. It tries to format the message reasonably by
5322 introducing newlines. All lines are indented by 4; the initial printing
5323 position must be set before calling.
5325 This function used always to print the error. Nowadays we want to restrict it
5326 to cases such as LMTP/SMTP errors from a remote host, and errors from :fail:
5327 and filter "fail". We no longer pass other information willy-nilly in bounce
5328 and warning messages. Text in user_message is always output; text in message
5329 only if the af_pass_message flag is set.
5333 f the FILE to print on
5340 print_address_error(address_item * addr, FILE * f, const uschar * t)
5342 int count = Ustrlen(t);
5343 uschar * s = testflag(addr, af_pass_message) ? addr->message : NULL;
5345 if (!s && !(s = addr->user_message))
5348 fprintf(f, "\n %s", t);
5351 if (*s == '\\' && s[1] == 'n')
5361 if (*s++ == ':' && isspace(*s) && count > 45)
5363 fprintf(f, "\n "); /* sic (because space follows) */
5370 /***********************************************************
5371 * Print Diagnostic-Code for an address *
5372 ************************************************************/
5374 /* This function is called to print the error information out of an address for
5375 a bounce or a warning message. It tries to format the message reasonably as
5376 required by RFC 3461 by adding a space after each newline
5378 it uses the same logic as print_address_error() above. if af_pass_message is true
5379 and addr->message is set it uses the remote host answer. if not addr->user_message
5380 is used instead if available.
5384 f the FILE to print on
5390 print_dsn_diagnostic_code(const address_item *addr, FILE *f)
5392 uschar * s = testflag(addr, af_pass_message) ? addr->message : NULL;
5395 /* af_pass_message and addr->message set ? print remote host answer */
5399 debug_printf("DSN Diagnostic-Code: addr->message = %s\n", addr->message);
5401 /* search first ": ". we assume to find the remote-MTA answer there */
5402 if (!(s = Ustrstr(addr->message, ": ")))
5403 return; /* not found, bail out */
5404 s += 2; /* skip ": " */
5405 cnt = fprintf(f, "Diagnostic-Code: smtp; ");
5407 /* no message available. do nothing */
5412 if (cnt > 950) /* RFC line length limit: 998 */
5414 DEBUG(D_deliver) debug_printf("print_dsn_diagnostic_code() truncated line\n");
5415 fputs("[truncated]", f);
5419 if (*s == '\\' && s[1] == 'n')
5421 fputs("\n ", f); /* as defined in RFC 3461 */
5436 /*************************************************
5437 * Check list of addresses for duplication *
5438 *************************************************/
5440 /* This function was introduced when the test for duplicate addresses that are
5441 not pipes, files, or autoreplies was moved from the middle of routing to when
5442 routing was complete. That was to fix obscure cases when the routing history
5443 affects the subsequent routing of identical addresses. This function is called
5444 after routing, to check that the final routed addresses are not duplicates.
5446 If we detect a duplicate, we remember what it is a duplicate of. Note that
5447 pipe, file, and autoreply de-duplication is handled during routing, so we must
5448 leave such "addresses" alone here, as otherwise they will incorrectly be
5451 Argument: address of list anchor
5456 do_duplicate_check(address_item **anchor)
5459 while ((addr = *anchor))
5462 if (testflag(addr, af_pfr))
5464 anchor = &(addr->next);
5466 else if ((tnode = tree_search(tree_duplicates, addr->unique)))
5468 DEBUG(D_deliver|D_route)
5469 debug_printf("%s is a duplicate address: discarded\n", addr->unique);
5470 *anchor = addr->next;
5471 addr->dupof = tnode->data.ptr;
5472 addr->next = addr_duplicate;
5473 addr_duplicate = addr;
5477 tree_add_duplicate(addr->unique, addr);
5478 anchor = &(addr->next);
5486 /************************************************/
5489 print_dsn_addr_action(FILE * f, address_item * addr,
5490 uschar * action, uschar * status)
5494 if (addr->dsn_orcpt)
5495 fprintf(f,"Original-Recipient: %s\n", addr->dsn_orcpt);
5497 for (pa = addr; pa->parent; ) pa = pa->parent;
5498 fprintf(f, "Action: %s\n"
5499 "Final-Recipient: rfc822;%s\n"
5501 action, pa->address, status);
5506 /* When running in the test harness, there's an option that allows us to
5507 fudge this time so as to get repeatability of the tests. Take the first
5508 time off the list. In queue runs, the list pointer gets updated in the
5512 test_harness_fudged_queue_time(int actual_time)
5515 if ( f.running_in_test_harness && *fudged_queue_times
5516 && (qt = readconf_readtime(fudged_queue_times, '/', FALSE)) >= 0)
5518 DEBUG(D_deliver) debug_printf("fudged queue_times = %s\n",
5519 fudged_queue_times);
5525 /************************************************/
5528 expand_open(const uschar * filename,
5529 const uschar * varname, const uschar * reason)
5531 const uschar * s = expand_cstring(filename);
5535 log_write(0, LOG_MAIN|LOG_PANIC,
5536 "Failed to expand %s: '%s'\n", varname, filename);
5537 else if (*s != '/' || is_tainted(s))
5538 log_write(0, LOG_MAIN|LOG_PANIC,
5539 "%s is not %s after expansion: '%s'\n",
5540 varname, *s == '/' ? "untainted" : "absolute", s);
5541 else if (!(fp = Ufopen(s, "rb")))
5542 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for %s "
5543 "message texts: %s", s, reason, strerror(errno));
5547 /*************************************************
5548 * Deliver one message *
5549 *************************************************/
5551 /* This is the function which is called when a message is to be delivered. It
5552 is passed the id of the message. It is possible that the message no longer
5553 exists, if some other process has delivered it, and it is also possible that
5554 the message is being worked on by another process, in which case the data file
5557 If no delivery is attempted for any of the above reasons, the function returns
5558 DELIVER_NOT_ATTEMPTED.
5560 If the give_up flag is set true, do not attempt any deliveries, but instead
5561 fail all outstanding addresses and return the message to the sender (or
5564 A delivery operation has a process all to itself; we never deliver more than
5565 one message in the same process. Therefore we needn't worry too much about
5568 Liable to be called as root.
5571 id the id of the message to be delivered
5572 forced TRUE if delivery was forced by an administrator; this overrides
5573 retry delays and causes a delivery to be tried regardless
5574 give_up TRUE if an administrator has requested that delivery attempts
5577 Returns: When the global variable mua_wrapper is FALSE:
5578 DELIVER_ATTEMPTED_NORMAL if a delivery attempt was made
5579 DELIVER_NOT_ATTEMPTED otherwise (see comment above)
5580 When the global variable mua_wrapper is TRUE:
5581 DELIVER_MUA_SUCCEEDED if delivery succeeded
5582 DELIVER_MUA_FAILED if delivery failed
5583 DELIVER_NOT_ATTEMPTED if not attempted (should not occur)
5587 deliver_message(uschar *id, BOOL forced, BOOL give_up)
5590 int final_yield = DELIVER_ATTEMPTED_NORMAL;
5591 time_t now = time(NULL);
5592 address_item *addr_last = NULL;
5593 uschar *filter_message = NULL;
5594 int process_recipients = RECIP_ACCEPT;
5597 extern int acl_where;
5600 #ifdef MEASURE_TIMING
5601 report_time_since(×tamp_startup, US"delivery start"); /* testcase 0022, 2100 */
5604 info = queue_run_pid == (pid_t)0
5605 ? string_sprintf("delivering %s", id)
5606 : string_sprintf("delivering %s (queue run pid %d)", id, queue_run_pid);
5608 /* If the D_process_info bit is on, set_process_info() will output debugging
5609 information. If not, we want to show this initial information if D_deliver or
5610 D_queue_run is set or in verbose mode. */
5612 set_process_info("%s", info);
5614 if ( !(debug_selector & D_process_info)
5615 && (debug_selector & (D_deliver|D_queue_run|D_v))
5617 debug_printf("%s\n", info);
5619 /* Ensure that we catch any subprocesses that are created. Although Exim
5620 sets SIG_DFL as its initial default, some routes through the code end up
5621 here with it set to SIG_IGN - cases where a non-synchronous delivery process
5622 has been forked, but no re-exec has been done. We use sigaction rather than
5623 plain signal() on those OS where SA_NOCLDWAIT exists, because we want to be
5624 sure it is turned off. (There was a problem on AIX with this.) */
5628 struct sigaction act;
5629 act.sa_handler = SIG_DFL;
5630 sigemptyset(&(act.sa_mask));
5632 sigaction(SIGCHLD, &act, NULL);
5635 signal(SIGCHLD, SIG_DFL);
5638 /* Make the forcing flag available for routers and transports, set up the
5639 global message id field, and initialize the count for returned files and the
5640 message size. This use of strcpy() is OK because the length id is checked when
5641 it is obtained from a command line (the -M or -q options), and otherwise it is
5642 known to be a valid message id. */
5644 if (id != message_id)
5645 Ustrcpy(message_id, id);
5646 f.deliver_force = forced;
5650 /* Initialize some flags */
5652 update_spool = FALSE;
5653 remove_journal = TRUE;
5655 /* Set a known context for any ACLs we call via expansions */
5656 acl_where = ACL_WHERE_DELIVERY;
5658 /* Reset the random number generator, so that if several delivery processes are
5659 started from a queue runner that has already used random numbers (for sorting),
5660 they don't all get the same sequence. */
5664 /* Open and lock the message's data file. Exim locks on this one because the
5665 header file may get replaced as it is re-written during the delivery process.
5666 Any failures cause messages to be written to the log, except for missing files
5667 while queue running - another process probably completed delivery. As part of
5668 opening the data file, message_subdir gets set. */
5670 if ((deliver_datafile = spool_open_datafile(id)) < 0)
5671 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5673 /* The value of message_size at this point has been set to the data length,
5674 plus one for the blank line that notionally precedes the data. */
5676 /* Now read the contents of the header file, which will set up the headers in
5677 store, and also the list of recipients and the tree of non-recipients and
5678 assorted flags. It updates message_size. If there is a reading or format error,
5679 give up; if the message has been around for sufficiently long, remove it. */
5682 uschar * spoolname = string_sprintf("%s-H", id);
5683 if ((rc = spool_read_header(spoolname, TRUE, TRUE)) != spool_read_OK)
5685 if (errno == ERRNO_SPOOLFORMAT)
5687 struct stat statbuf;
5688 if (Ustat(spool_fname(US"input", message_subdir, spoolname, US""),
5690 log_write(0, LOG_MAIN, "Format error in spool file %s: "
5691 "size=" OFF_T_FMT, spoolname, statbuf.st_size);
5693 log_write(0, LOG_MAIN, "Format error in spool file %s", spoolname);
5696 log_write(0, LOG_MAIN, "Error reading spool file %s: %s", spoolname,
5699 /* If we managed to read the envelope data, received_time contains the
5700 time the message was received. Otherwise, we can calculate it from the
5703 if (rc != spool_read_hdrerror)
5705 received_time.tv_sec = received_time.tv_usec = 0;
5706 /*XXX subsec precision?*/
5707 for (i = 0; i < 6; i++)
5708 received_time.tv_sec = received_time.tv_sec * BASE_62 + tab62[id[i] - '0'];
5711 /* If we've had this malformed message too long, sling it. */
5713 if (now - received_time.tv_sec > keep_malformed)
5715 Uunlink(spool_fname(US"msglog", message_subdir, id, US""));
5716 Uunlink(spool_fname(US"input", message_subdir, id, US"-D"));
5717 Uunlink(spool_fname(US"input", message_subdir, id, US"-H"));
5718 Uunlink(spool_fname(US"input", message_subdir, id, US"-J"));
5719 log_write(0, LOG_MAIN, "Message removed because older than %s",
5720 readconf_printtime(keep_malformed));
5723 (void)close(deliver_datafile);
5724 deliver_datafile = -1;
5725 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5729 /* The spool header file has been read. Look to see if there is an existing
5730 journal file for this message. If there is, it means that a previous delivery
5731 attempt crashed (program or host) before it could update the spool header file.
5732 Read the list of delivered addresses from the journal and add them to the
5733 nonrecipients tree. Then update the spool file. We can leave the journal in
5734 existence, as it will get further successful deliveries added to it in this
5735 run, and it will be deleted if this function gets to its end successfully.
5736 Otherwise it might be needed again. */
5739 uschar * fname = spool_fname(US"input", message_subdir, id, US"-J");
5742 if ( (journal_fd = Uopen(fname,
5743 O_RDWR|O_APPEND | EXIM_CLOEXEC | EXIM_NOFOLLOW, SPOOL_MODE)) >= 0
5744 && lseek(journal_fd, 0, SEEK_SET) == 0
5745 && (jread = fdopen(journal_fd, "rb"))
5748 while (Ufgets(big_buffer, big_buffer_size, jread))
5750 int n = Ustrlen(big_buffer);
5751 big_buffer[n-1] = 0;
5752 tree_add_nonrecipient(big_buffer);
5753 DEBUG(D_deliver) debug_printf("Previously delivered address %s taken from "
5754 "journal file\n", big_buffer);
5757 if ((journal_fd = dup(fileno(jread))) < 0)
5758 journal_fd = fileno(jread);
5760 (void) fclose(jread); /* Try to not leak the FILE resource */
5762 /* Panic-dies on error */
5763 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
5765 else if (errno != ENOENT)
5767 log_write(0, LOG_MAIN|LOG_PANIC, "attempt to open journal for reading gave: "
5768 "%s", strerror(errno));
5769 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5772 /* A null recipients list indicates some kind of disaster. */
5774 if (!recipients_list)
5776 (void)close(deliver_datafile);
5777 deliver_datafile = -1;
5778 log_write(0, LOG_MAIN, "Spool error: no recipients for %s", fname);
5779 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5784 /* Handle a message that is frozen. There are a number of different things that
5785 can happen, but in the default situation, unless forced, no delivery is
5788 if (f.deliver_freeze)
5790 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
5791 /* Moving to another directory removes the message from Exim's view. Other
5792 tools must be used to deal with it. Logging of this action happens in
5793 spool_move_message() and its subfunctions. */
5795 if ( move_frozen_messages
5796 && spool_move_message(id, message_subdir, US"", US"F")
5798 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5801 /* For all frozen messages (bounces or not), timeout_frozen_after sets the
5802 maximum time to keep messages that are frozen. Thaw if we reach it, with a
5803 flag causing all recipients to be failed. The time is the age of the
5804 message, not the time since freezing. */
5806 if (timeout_frozen_after > 0 && message_age >= timeout_frozen_after)
5808 log_write(0, LOG_MAIN, "cancelled by timeout_frozen_after");
5809 process_recipients = RECIP_FAIL_TIMEOUT;
5812 /* For bounce messages (and others with no sender), thaw if the error message
5813 ignore timer is exceeded. The message will be discarded if this delivery
5816 else if (!*sender_address && message_age >= ignore_bounce_errors_after)
5817 log_write(0, LOG_MAIN, "Unfrozen by errmsg timer");
5819 /* If this is a bounce message, or there's no auto thaw, or we haven't
5820 reached the auto thaw time yet, and this delivery is not forced by an admin
5821 user, do not attempt delivery of this message. Note that forced is set for
5822 continuing messages down the same channel, in order to skip load checking and
5823 ignore hold domains, but we don't want unfreezing in that case. */
5827 if ( ( sender_address[0] == 0
5829 || now <= deliver_frozen_at + auto_thaw
5831 && ( !forced || !f.deliver_force_thaw
5832 || !f.admin_user || continue_hostname
5835 (void)close(deliver_datafile);
5836 deliver_datafile = -1;
5837 log_write(L_skip_delivery, LOG_MAIN, "Message is frozen");
5838 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5841 /* If delivery was forced (by an admin user), assume a manual thaw.
5842 Otherwise it's an auto thaw. */
5846 f.deliver_manual_thaw = TRUE;
5847 log_write(0, LOG_MAIN, "Unfrozen by forced delivery");
5849 else log_write(0, LOG_MAIN, "Unfrozen by auto-thaw");
5852 /* We get here if any of the rules for unfreezing have triggered. */
5854 f.deliver_freeze = FALSE;
5855 update_spool = TRUE;
5859 /* Open the message log file if we are using them. This records details of
5860 deliveries, deferments, and failures for the benefit of the mail administrator.
5861 The log is not used by exim itself to track the progress of a message; that is
5862 done by rewriting the header spool file. */
5866 uschar * fname = spool_fname(US"msglog", message_subdir, id, US"");
5870 if ((fd = open_msglog_file(fname, SPOOL_MODE, &error)) < 0)
5872 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't %s message log %s: %s", error,
5873 fname, strerror(errno));
5874 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5877 /* Make a stdio stream out of it. */
5879 if (!(message_log = fdopen(fd, "a")))
5881 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't fdopen message log %s: %s",
5882 fname, strerror(errno));
5883 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5888 /* If asked to give up on a message, log who did it, and set the action for all
5893 struct passwd *pw = getpwuid(real_uid);
5894 log_write(0, LOG_MAIN, "cancelled by %s",
5895 pw ? US pw->pw_name : string_sprintf("uid %ld", (long int)real_uid));
5896 process_recipients = RECIP_FAIL;
5899 /* Otherwise, if there are too many Received: headers, fail all recipients. */
5901 else if (received_count > received_headers_max)
5902 process_recipients = RECIP_FAIL_LOOP;
5904 /* Otherwise, if a system-wide, address-independent message filter is
5905 specified, run it now, except in the case when we are failing all recipients as
5906 a result of timeout_frozen_after. If the system filter yields "delivered", then
5907 ignore the true recipients of the message. Failure of the filter file is
5908 logged, and the delivery attempt fails. */
5910 else if (system_filter && process_recipients != RECIP_FAIL_TIMEOUT)
5915 redirect_block redirect;
5917 if (system_filter_uid_set)
5919 ugid.uid = system_filter_uid;
5920 ugid.gid = system_filter_gid;
5921 ugid.uid_set = ugid.gid_set = TRUE;
5924 ugid.uid_set = ugid.gid_set = FALSE;
5926 return_path = sender_address;
5927 f.enable_dollar_recipients = TRUE; /* Permit $recipients in system filter */
5928 f.system_filtering = TRUE;
5930 /* Any error in the filter file causes a delivery to be abandoned. */
5932 redirect.string = system_filter;
5933 redirect.isfile = TRUE;
5934 redirect.check_owner = redirect.check_group = FALSE;
5935 redirect.owners = NULL;
5936 redirect.owngroups = NULL;
5938 redirect.modemask = 0;
5940 DEBUG(D_deliver|D_filter) debug_printf("running system filter\n");
5943 &redirect, /* Where the data is */
5944 RDO_DEFER | /* Turn on all the enabling options */
5945 RDO_FAIL | /* Leave off all the disabling options */
5950 NULL, /* No :include: restriction (not used in filter) */
5951 NULL, /* No sieve vacation directory (not sieve!) */
5952 NULL, /* No sieve enotify mailto owner (not sieve!) */
5953 NULL, /* No sieve user address (not sieve!) */
5954 NULL, /* No sieve subaddress (not sieve!) */
5955 &ugid, /* uid/gid data */
5956 &addr_new, /* Where to hang generated addresses */
5957 &filter_message, /* Where to put error message */
5958 NULL, /* Don't skip syntax errors */
5959 &filtertype, /* Will always be set to FILTER_EXIM for this call */
5960 US"system filter"); /* For error messages */
5962 DEBUG(D_deliver|D_filter) debug_printf("system filter returned %d\n", rc);
5964 if (rc == FF_ERROR || rc == FF_NONEXIST)
5966 (void)close(deliver_datafile);
5967 deliver_datafile = -1;
5968 log_write(0, LOG_MAIN|LOG_PANIC, "Error in system filter: %s",
5969 string_printing(filter_message));
5970 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5973 /* Reset things. If the filter message is an empty string, which can happen
5974 for a filter "fail" or "freeze" command with no text, reset it to NULL. */
5976 f.system_filtering = FALSE;
5977 f.enable_dollar_recipients = FALSE;
5978 if (filter_message && filter_message[0] == 0) filter_message = NULL;
5980 /* Save the values of the system filter variables so that user filters
5983 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5985 /* The filter can request that delivery of the original addresses be
5990 process_recipients = RECIP_DEFER;
5991 deliver_msglog("Delivery deferred by system filter\n");
5992 log_write(0, LOG_MAIN, "Delivery deferred by system filter");
5995 /* The filter can request that a message be frozen, but this does not
5996 take place if the message has been manually thawed. In that case, we must
5997 unset "delivered", which is forced by the "freeze" command to make -bF
6000 else if (rc == FF_FREEZE && !f.deliver_manual_thaw)
6002 f.deliver_freeze = TRUE;
6003 deliver_frozen_at = time(NULL);
6004 process_recipients = RECIP_DEFER;
6005 frozen_info = string_sprintf(" by the system filter%s%s",
6006 filter_message ? US": " : US"",
6007 filter_message ? filter_message : US"");
6010 /* The filter can request that a message be failed. The error message may be
6011 quite long - it is sent back to the sender in the bounce - but we don't want
6012 to fill up the log with repetitions of it. If it starts with << then the text
6013 between << and >> is written to the log, with the rest left for the bounce
6016 else if (rc == FF_FAIL)
6018 uschar *colon = US"";
6019 uschar *logmsg = US"";
6022 process_recipients = RECIP_FAIL_FILTER;
6028 if ( filter_message[0] == '<'
6029 && filter_message[1] == '<'
6030 && (logend = Ustrstr(filter_message, ">>"))
6033 logmsg = filter_message + 2;
6034 loglen = logend - logmsg;
6035 filter_message = logend + 2;
6036 if (filter_message[0] == 0) filter_message = NULL;
6040 logmsg = filter_message;
6041 loglen = Ustrlen(filter_message);
6045 log_write(0, LOG_MAIN, "cancelled by system filter%s%.*s", colon, loglen,
6049 /* Delivery can be restricted only to those recipients (if any) that the
6050 filter specified. */
6052 else if (rc == FF_DELIVERED)
6054 process_recipients = RECIP_IGNORE;
6056 log_write(0, LOG_MAIN, "original recipients ignored (system filter)");
6058 log_write(0, LOG_MAIN, "=> discarded (system filter)");
6061 /* If any new addresses were created by the filter, fake up a "parent"
6062 for them. This is necessary for pipes, etc., which are expected to have
6063 parents, and it also gives some sensible logging for others. Allow
6064 pipes, files, and autoreplies, and run them as the filter uid if set,
6065 otherwise as the current uid. */
6069 int uid = system_filter_uid_set ? system_filter_uid : geteuid();
6070 int gid = system_filter_gid_set ? system_filter_gid : getegid();
6072 /* The text "system-filter" is tested in transport_set_up_command() and in
6073 set_up_shell_command() in the pipe transport, to enable them to permit
6074 $recipients, so don't change it here without also changing it there. */
6076 address_item *p = addr_new;
6077 address_item *parent = deliver_make_addr(US"system-filter", FALSE);
6079 parent->domain = string_copylc(qualify_domain_recipient);
6080 parent->local_part = US"system-filter";
6082 /* As part of this loop, we arrange for addr_last to end up pointing
6083 at the final address. This is used if we go on to add addresses for the
6084 original recipients. */
6088 if (parent->child_count == USHRT_MAX)
6089 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "system filter generated more "
6090 "than %d delivery addresses", USHRT_MAX);
6091 parent->child_count++;
6094 if (testflag(p, af_pfr))
6100 setflag(p, af_uid_set);
6101 setflag(p, af_gid_set);
6102 setflag(p, af_allow_file);
6103 setflag(p, af_allow_pipe);
6104 setflag(p, af_allow_reply);
6106 /* Find the name of the system filter's appropriate pfr transport */
6108 if (p->address[0] == '|')
6111 tpname = system_filter_pipe_transport;
6112 address_pipe = p->address;
6114 else if (p->address[0] == '>')
6117 tpname = system_filter_reply_transport;
6121 if (p->address[Ustrlen(p->address)-1] == '/')
6123 type = US"directory";
6124 tpname = system_filter_directory_transport;
6129 tpname = system_filter_file_transport;
6131 address_file = p->address;
6134 /* Now find the actual transport, first expanding the name. We have
6135 set address_file or address_pipe above. */
6139 uschar *tmp = expand_string(tpname);
6140 address_file = address_pipe = NULL;
6142 p->message = string_sprintf("failed to expand \"%s\" as a "
6143 "system filter transport name", tpname);
6144 if (is_tainted(tmp))
6145 p->message = string_sprintf("attempt to used tainted value '%s' for"
6146 "transport '%s' as a system filter", tmp, tpname);
6150 p->message = string_sprintf("system_filter_%s_transport is unset",
6155 transport_instance *tp;
6156 for (tp = transports; tp; tp = tp->next)
6157 if (Ustrcmp(tp->name, tpname) == 0)
6163 p->message = string_sprintf("failed to find \"%s\" transport "
6164 "for system filter delivery", tpname);
6167 /* If we couldn't set up a transport, defer the delivery, putting the
6168 error on the panic log as well as the main log. */
6172 address_item *badp = p;
6174 if (!addr_last) addr_new = p; else addr_last->next = p;
6175 badp->local_part = badp->address; /* Needed for log line */
6176 post_process_one(badp, DEFER, LOG_MAIN|LOG_PANIC, EXIM_DTYPE_ROUTER, 0);
6179 } /* End of pfr handling */
6181 /* Either a non-pfr delivery, or we found a transport */
6183 DEBUG(D_deliver|D_filter)
6184 debug_printf("system filter added %s\n", p->address);
6188 } /* Loop through all addr_new addresses */
6193 /* Scan the recipients list, and for every one that is not in the non-
6194 recipients tree, add an addr item to the chain of new addresses. If the pno
6195 value is non-negative, we must set the onetime parent from it. This which
6196 points to the relevant entry in the recipients list.
6198 This processing can be altered by the setting of the process_recipients
6199 variable, which is changed if recipients are to be ignored, failed, or
6200 deferred. This can happen as a result of system filter activity, or if the -Mg
6201 option is used to fail all of them.
6203 Duplicate addresses are handled later by a different tree structure; we can't
6204 just extend the non-recipients tree, because that will be re-written to the
6205 spool if the message is deferred, and in any case there are casing
6206 complications for local addresses. */
6208 if (process_recipients != RECIP_IGNORE)
6209 for (i = 0; i < recipients_count; i++)
6210 if (!tree_search(tree_nonrecipients, recipients_list[i].address))
6212 recipient_item *r = recipients_list + i;
6213 address_item *new = deliver_make_addr(r->address, FALSE);
6214 new->prop.errors_address = r->errors_to;
6216 if ((new->prop.utf8_msg = message_smtputf8))
6218 new->prop.utf8_downcvt = message_utf8_downconvert == 1;
6219 new->prop.utf8_downcvt_maybe = message_utf8_downconvert == -1;
6220 DEBUG(D_deliver) debug_printf("utf8, downconvert %s\n",
6221 new->prop.utf8_downcvt ? "yes"
6222 : new->prop.utf8_downcvt_maybe ? "ifneeded"
6228 new->onetime_parent = recipients_list[r->pno].address;
6230 /* If DSN support is enabled, set the dsn flags and the original receipt
6231 to be passed on to other DSN enabled MTAs */
6233 new->dsn_flags = r->dsn_flags & rf_dsnflags;
6234 new->dsn_orcpt = r->orcpt;
6235 DEBUG(D_deliver) debug_printf("DSN: set orcpt: %s flags: 0x%x\n",
6236 new->dsn_orcpt ? new->dsn_orcpt : US"", new->dsn_flags);
6238 switch (process_recipients)
6240 /* RECIP_DEFER is set when a system filter freezes a message. */
6243 new->next = addr_defer;
6248 /* RECIP_FAIL_FILTER is set when a system filter has obeyed a "fail"
6251 case RECIP_FAIL_FILTER:
6253 filter_message ? filter_message : US"delivery cancelled";
6254 setflag(new, af_pass_message);
6255 goto RECIP_QUEUE_FAILED; /* below */
6258 /* RECIP_FAIL_TIMEOUT is set when a message is frozen, but is older
6259 than the value in timeout_frozen_after. Treat non-bounce messages
6260 similarly to -Mg; for bounce messages we just want to discard, so
6261 don't put the address on the failed list. The timeout has already
6264 case RECIP_FAIL_TIMEOUT:
6265 new->message = US"delivery cancelled; message timed out";
6266 goto RECIP_QUEUE_FAILED; /* below */
6269 /* RECIP_FAIL is set when -Mg has been used. */
6272 new->message = US"delivery cancelled by administrator";
6275 /* Common code for the failure cases above. If this is not a bounce
6276 message, put the address on the failed list so that it is used to
6277 create a bounce. Otherwise do nothing - this just discards the address.
6278 The incident has already been logged. */
6281 if (sender_address[0])
6283 new->next = addr_failed;
6289 /* RECIP_FAIL_LOOP is set when there are too many Received: headers
6290 in the message. Process each address as a routing failure; if this
6291 is a bounce message, it will get frozen. */
6293 case RECIP_FAIL_LOOP:
6294 new->message = US"Too many \"Received\" headers - suspected mail loop";
6295 post_process_one(new, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6299 /* Value should be RECIP_ACCEPT; take this as the safe default. */
6302 if (!addr_new) addr_new = new; else addr_last->next = new;
6307 #ifndef DISABLE_EVENT
6308 if (process_recipients != RECIP_ACCEPT && event_action)
6310 uschar * save_local = deliver_localpart;
6311 const uschar * save_domain = deliver_domain;
6312 uschar * addr = new->address, * errmsg = NULL;
6313 int start, end, dom;
6315 if (!parse_extract_address(addr, &errmsg, &start, &end, &dom, TRUE))
6316 log_write(0, LOG_MAIN|LOG_PANIC,
6317 "failed to parse address '%.100s': %s\n", addr, errmsg);
6321 string_copyn(addr+start, dom ? (dom-1) - start : end - start);
6322 deliver_domain = dom ? CUS string_copyn(addr+dom, end - dom) : CUS"";
6324 (void) event_raise(event_action, US"msg:fail:internal", new->message, NULL);
6326 deliver_localpart = save_local;
6327 deliver_domain = save_domain;
6335 debug_printf("Delivery address list:\n");
6336 for (address_item * p = addr_new; p; p = p->next)
6337 debug_printf(" %s %s\n", p->address,
6338 p->onetime_parent ? p->onetime_parent : US"");
6341 /* Set up the buffers used for copying over the file when delivering. */
6343 deliver_in_buffer = store_malloc(DELIVER_IN_BUFFER_SIZE);
6344 deliver_out_buffer = store_malloc(DELIVER_OUT_BUFFER_SIZE);
6348 /* Until there are no more new addresses, handle each one as follows:
6350 . If this is a generated address (indicated by the presence of a parent
6351 pointer) then check to see whether it is a pipe, file, or autoreply, and
6352 if so, handle it directly here. The router that produced the address will
6353 have set the allow flags into the address, and also set the uid/gid required.
6354 Having the routers generate new addresses and then checking them here at
6355 the outer level is tidier than making each router do the checking, and
6356 means that routers don't need access to the failed address queue.
6358 . Break up the address into local part and domain, and make lowercased
6359 versions of these strings. We also make unquoted versions of the local part.
6361 . Handle the percent hack for those domains for which it is valid.
6363 . For child addresses, determine if any of the parents have the same address.
6364 If so, generate a different string for previous delivery checking. Without
6365 this code, if the address spqr generates spqr via a forward or alias file,
6366 delivery of the generated spqr stops further attempts at the top level spqr,
6367 which is not what is wanted - it may have generated other addresses.
6369 . Check on the retry database to see if routing was previously deferred, but
6370 only if in a queue run. Addresses that are to be routed are put on the
6371 addr_route chain. Addresses that are to be deferred are put on the
6372 addr_defer chain. We do all the checking first, so as not to keep the
6373 retry database open any longer than necessary.
6375 . Now we run the addresses through the routers. A router may put the address
6376 on either the addr_local or the addr_remote chain for local or remote
6377 delivery, respectively, or put it on the addr_failed chain if it is
6378 undeliveable, or it may generate child addresses and put them on the
6379 addr_new chain, or it may defer an address. All the chain anchors are
6380 passed as arguments so that the routers can be called for verification
6383 . If new addresses have been generated by the routers, da capo.
6386 f.header_rewritten = FALSE; /* No headers rewritten yet */
6387 while (addr_new) /* Loop until all addresses dealt with */
6389 address_item *addr, *parent;
6391 /* Failure to open the retry database is treated the same as if it does
6392 not exist. In both cases, dbm_file is NULL. */
6394 if (!(dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE, TRUE)))
6395 DEBUG(D_deliver|D_retry|D_route|D_hints_lookup)
6396 debug_printf("no retry data available\n");
6398 /* Scan the current batch of new addresses, to handle pipes, files and
6399 autoreplies, and determine which others are ready for routing. */
6405 dbdata_retry * domain_retry_record, * address_retry_record;
6408 addr_new = addr->next;
6410 DEBUG(D_deliver|D_retry|D_route)
6412 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
6413 debug_printf("Considering: %s\n", addr->address);
6416 /* Handle generated address that is a pipe or a file or an autoreply. */
6418 if (testflag(addr, af_pfr))
6420 /* If an autoreply in a filter could not generate a syntactically valid
6421 address, give up forthwith. Set af_ignore_error so that we don't try to
6422 generate a bounce. */
6424 if (testflag(addr, af_bad_reply))
6426 addr->basic_errno = ERRNO_BADADDRESS2;
6427 addr->local_part = addr->address;
6429 US"filter autoreply generated syntactically invalid recipient";
6430 addr->prop.ignore_error = TRUE;
6431 (void) post_process_one(addr, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6432 continue; /* with the next new address */
6435 /* If two different users specify delivery to the same pipe or file or
6436 autoreply, there should be two different deliveries, so build a unique
6437 string that incorporates the original address, and use this for
6438 duplicate testing and recording delivery, and also for retrying. */
6441 string_sprintf("%s:%s", addr->address, addr->parent->unique +
6442 (testflag(addr->parent, af_homonym)? 3:0));
6444 addr->address_retry_key = addr->domain_retry_key =
6445 string_sprintf("T:%s", addr->unique);
6447 /* If a filter file specifies two deliveries to the same pipe or file,
6448 we want to de-duplicate, but this is probably not wanted for two mail
6449 commands to the same address, where probably both should be delivered.
6450 So, we have to invent a different unique string in that case. Just
6451 keep piling '>' characters on the front. */
6453 if (addr->address[0] == '>')
6454 while (tree_search(tree_duplicates, addr->unique))
6455 addr->unique = string_sprintf(">%s", addr->unique);
6457 else if ((tnode = tree_search(tree_duplicates, addr->unique)))
6459 DEBUG(D_deliver|D_route)
6460 debug_printf("%s is a duplicate address: discarded\n", addr->address);
6461 addr->dupof = tnode->data.ptr;
6462 addr->next = addr_duplicate;
6463 addr_duplicate = addr;
6467 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
6469 /* Check for previous delivery */
6471 if (tree_search(tree_nonrecipients, addr->unique))
6473 DEBUG(D_deliver|D_route)
6474 debug_printf("%s was previously delivered: discarded\n", addr->address);
6475 child_done(addr, tod_stamp(tod_log));
6479 /* Save for checking future duplicates */
6481 tree_add_duplicate(addr->unique, addr);
6483 /* Set local part and domain */
6485 addr->local_part = addr->address;
6486 addr->domain = addr->parent->domain;
6488 /* Ensure that the delivery is permitted. */
6490 if (testflag(addr, af_file))
6492 if (!testflag(addr, af_allow_file))
6494 addr->basic_errno = ERRNO_FORBIDFILE;
6495 addr->message = US"delivery to file forbidden";
6496 (void)post_process_one(addr, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6497 continue; /* with the next new address */
6500 else if (addr->address[0] == '|')
6502 if (!testflag(addr, af_allow_pipe))
6504 addr->basic_errno = ERRNO_FORBIDPIPE;
6505 addr->message = US"delivery to pipe forbidden";
6506 (void)post_process_one(addr, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6507 continue; /* with the next new address */
6510 else if (!testflag(addr, af_allow_reply))
6512 addr->basic_errno = ERRNO_FORBIDREPLY;
6513 addr->message = US"autoreply forbidden";
6514 (void)post_process_one(addr, FAIL, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6515 continue; /* with the next new address */
6518 /* If the errno field is already set to BADTRANSPORT, it indicates
6519 failure to expand a transport string, or find the associated transport,
6520 or an unset transport when one is required. Leave this test till now so
6521 that the forbid errors are given in preference. */
6523 if (addr->basic_errno == ERRNO_BADTRANSPORT)
6525 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6529 /* Treat /dev/null as a special case and abandon the delivery. This
6530 avoids having to specify a uid on the transport just for this case.
6531 Arrange for the transport name to be logged as "**bypassed**".
6532 Copy the transport for this fairly unusual case rather than having
6533 to make all transports mutable. */
6535 if (Ustrcmp(addr->address, "/dev/null") == 0)
6537 transport_instance * save_t = addr->transport;
6538 transport_instance * t = store_get(sizeof(*t), save_t);
6540 t->name = US"**bypassed**";
6541 addr->transport = t;
6542 (void)post_process_one(addr, OK, LOG_MAIN, EXIM_DTYPE_TRANSPORT, '=');
6543 addr->transport= save_t;
6544 continue; /* with the next new address */
6547 /* Pipe, file, or autoreply delivery is to go ahead as a normal local
6550 DEBUG(D_deliver|D_route)
6551 debug_printf("queued for %s transport\n", addr->transport->name);
6552 addr->next = addr_local;
6554 continue; /* with the next new address */
6557 /* Handle normal addresses. First, split up into local part and domain,
6558 handling the %-hack if necessary. There is the possibility of a defer from
6559 a lookup in percent_hack_domains. */
6561 if ((rc = deliver_split_address(addr)) == DEFER)
6563 addr->message = US"cannot check percent_hack_domains";
6564 addr->basic_errno = ERRNO_LISTDEFER;
6565 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_NONE, 0);
6569 /* Check to see if the domain is held. If so, proceed only if the
6570 delivery was forced by hand. */
6572 deliver_domain = addr->domain; /* set $domain */
6573 if ( !forced && hold_domains
6574 && (rc = match_isinlist(addr->domain, (const uschar **)&hold_domains, 0,
6575 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE,
6581 addr->message = US"hold_domains lookup deferred";
6582 addr->basic_errno = ERRNO_LISTDEFER;
6586 addr->message = US"domain is held";
6587 addr->basic_errno = ERRNO_HELD;
6589 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_NONE, 0);
6593 /* Now we can check for duplicates and previously delivered addresses. In
6594 order to do this, we have to generate a "unique" value for each address,
6595 because there may be identical actual addresses in a line of descendents.
6596 The "unique" field is initialized to the same value as the "address" field,
6597 but gets changed here to cope with identically-named descendents. */
6599 for (parent = addr->parent; parent; parent = parent->parent)
6600 if (strcmpic(addr->address, parent->address) == 0) break;
6602 /* If there's an ancestor with the same name, set the homonym flag. This
6603 influences how deliveries are recorded. Then add a prefix on the front of
6604 the unique address. We use \n\ where n starts at 0 and increases each time.
6605 It is unlikely to pass 9, but if it does, it may look odd but will still
6606 work. This means that siblings or cousins with the same names are treated
6607 as duplicates, which is what we want. */
6611 setflag(addr, af_homonym);
6612 if (parent->unique[0] != '\\')
6613 addr->unique = string_sprintf("\\0\\%s", addr->address);
6615 addr->unique = string_sprintf("\\%c\\%s", parent->unique[1] + 1,
6619 /* Ensure that the domain in the unique field is lower cased, because
6620 domains are always handled caselessly. */
6622 for (uschar * p = Ustrrchr(addr->unique, '@'); *p; p++) *p = tolower(*p);
6624 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
6626 if (tree_search(tree_nonrecipients, addr->unique))
6628 DEBUG(D_deliver|D_route)
6629 debug_printf("%s was previously delivered: discarded\n", addr->unique);
6630 child_done(addr, tod_stamp(tod_log));
6634 /* Get the routing retry status, saving the two retry keys (with and
6635 without the local part) for subsequent use. If there is no retry record for
6636 the standard address routing retry key, we look for the same key with the
6637 sender attached, because this form is used by the smtp transport after a
6638 4xx response to RCPT when address_retry_include_sender is true. */
6640 addr->domain_retry_key = string_sprintf("R:%s", addr->domain);
6641 addr->address_retry_key = string_sprintf("R:%s@%s", addr->local_part,
6646 domain_retry_record = dbfn_read(dbm_file, addr->domain_retry_key);
6647 if ( domain_retry_record
6648 && now - domain_retry_record->time_stamp > retry_data_expire
6651 DEBUG(D_deliver|D_retry)
6652 debug_printf("domain retry record present but expired\n");
6653 domain_retry_record = NULL; /* Ignore if too old */
6656 address_retry_record = dbfn_read(dbm_file, addr->address_retry_key);
6657 if ( address_retry_record
6658 && now - address_retry_record->time_stamp > retry_data_expire
6661 DEBUG(D_deliver|D_retry)
6662 debug_printf("address retry record present but expired\n");
6663 address_retry_record = NULL; /* Ignore if too old */
6666 if (!address_retry_record)
6668 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
6670 address_retry_record = dbfn_read(dbm_file, altkey);
6671 if ( address_retry_record
6672 && now - address_retry_record->time_stamp > retry_data_expire)
6674 DEBUG(D_deliver|D_retry)
6675 debug_printf("address<sender> retry record present but expired\n");
6676 address_retry_record = NULL; /* Ignore if too old */
6681 domain_retry_record = address_retry_record = NULL;
6683 DEBUG(D_deliver|D_retry)
6685 if (!domain_retry_record)
6686 debug_printf("no domain retry record\n");
6688 debug_printf("have domain retry record; next_try = now%+d\n",
6689 f.running_in_test_harness ? 0 :
6690 (int)(domain_retry_record->next_try - now));
6692 if (!address_retry_record)
6693 debug_printf("no address retry record\n");
6695 debug_printf("have address retry record; next_try = now%+d\n",
6696 f.running_in_test_harness ? 0 :
6697 (int)(address_retry_record->next_try - now));
6700 /* If we are sending a message down an existing SMTP connection, we must
6701 assume that the message which created the connection managed to route
6702 an address to that connection. We do not want to run the risk of taking
6703 a long time over routing here, because if we do, the server at the other
6704 end of the connection may time it out. This is especially true for messages
6705 with lots of addresses. For this kind of delivery, queue_running is not
6706 set, so we would normally route all addresses. We take a pragmatic approach
6707 and defer routing any addresses that have any kind of domain retry record.
6708 That is, we don't even look at their retry times. It doesn't matter if this
6709 doesn't work occasionally. This is all just an optimization, after all.
6711 The reason for not doing the same for address retries is that they normally
6712 arise from 4xx responses, not DNS timeouts. */
6714 if (continue_hostname && domain_retry_record)
6716 addr->message = US"reusing SMTP connection skips previous routing defer";
6717 addr->basic_errno = ERRNO_RRETRY;
6718 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6720 addr->message = domain_retry_record->text;
6721 setflag(addr, af_pass_message);
6724 /* If we are in a queue run, defer routing unless there is no retry data or
6725 we've passed the next retry time, or this message is forced. In other
6726 words, ignore retry data when not in a queue run.
6728 However, if the domain retry time has expired, always allow the routing
6729 attempt. If it fails again, the address will be failed. This ensures that
6730 each address is routed at least once, even after long-term routing
6733 If there is an address retry, check that too; just wait for the next
6734 retry time. This helps with the case when the temporary error on the
6735 address was really message-specific rather than address specific, since
6736 it allows other messages through.
6738 We also wait for the next retry time if this is a message sent down an
6739 existing SMTP connection (even though that will be forced). Otherwise there
6740 will be far too many attempts for an address that gets a 4xx error. In
6741 fact, after such an error, we should not get here because, the host should
6742 not be remembered as one this message needs. However, there was a bug that
6743 used to cause this to happen, so it is best to be on the safe side.
6745 Even if we haven't reached the retry time in the hints, there is one more
6746 check to do, which is for the ultimate address timeout. We only do this
6747 check if there is an address retry record and there is not a domain retry
6748 record; this implies that previous attempts to handle the address had the
6749 retry_use_local_parts option turned on. We use this as an approximation
6750 for the destination being like a local delivery, for example delivery over
6751 LMTP to an IMAP message store. In this situation users are liable to bump
6752 into their quota and thereby have intermittently successful deliveries,
6753 which keep the retry record fresh, which can lead to us perpetually
6754 deferring messages. */
6756 else if ( ( f.queue_running && !f.deliver_force
6757 || continue_hostname
6759 && ( ( domain_retry_record
6760 && now < domain_retry_record->next_try
6761 && !domain_retry_record->expired
6763 || ( address_retry_record
6764 && now < address_retry_record->next_try
6766 && ( domain_retry_record
6767 || !address_retry_record
6768 || !retry_ultimate_address_timeout(addr->address_retry_key,
6769 addr->domain, address_retry_record, now)
6772 addr->message = US"retry time not reached";
6773 addr->basic_errno = ERRNO_RRETRY;
6774 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6776 /* For remote-retry errors (here and just above) that we've not yet
6777 hit the retry time, use the error recorded in the retry database
6778 as info in the warning message. This lets us send a message even
6779 when we're not failing on a fresh attempt. We assume that this
6780 info is not sensitive. */
6782 addr->message = domain_retry_record
6783 ? domain_retry_record->text : address_retry_record->text;
6784 setflag(addr, af_pass_message);
6787 /* The domain is OK for routing. Remember if retry data exists so it
6788 can be cleaned up after a successful delivery. */
6792 if (domain_retry_record || address_retry_record)
6793 setflag(addr, af_dr_retry_exists);
6794 addr->next = addr_route;
6796 DEBUG(D_deliver|D_route)
6797 debug_printf("%s: queued for routing\n", addr->address);
6801 /* The database is closed while routing is actually happening. Requests to
6802 update it are put on a chain and all processed together at the end. */
6804 if (dbm_file) dbfn_close(dbm_file);
6806 /* If queue_domains is set, we don't even want to try routing addresses in
6807 those domains. During queue runs, queue_domains is forced to be unset.
6808 Optimize by skipping this pass through the addresses if nothing is set. */
6810 if (!f.deliver_force && queue_domains)
6812 address_item *okaddr = NULL;
6815 address_item *addr = addr_route;
6816 addr_route = addr->next;
6818 deliver_domain = addr->domain; /* set $domain */
6819 if ((rc = match_isinlist(addr->domain, CUSS &queue_domains, 0,
6820 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
6824 addr->basic_errno = ERRNO_LISTDEFER;
6825 addr->message = US"queue_domains lookup deferred";
6826 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6830 addr->next = okaddr;
6835 addr->basic_errno = ERRNO_QUEUE_DOMAIN;
6836 addr->message = US"domain is in queue_domains";
6837 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6841 addr_route = okaddr;
6844 /* Now route those addresses that are not deferred. */
6849 address_item *addr = addr_route;
6850 const uschar *old_domain = addr->domain;
6851 uschar *old_unique = addr->unique;
6852 addr_route = addr->next;
6855 /* Just in case some router parameter refers to it. */
6857 if (!(return_path = addr->prop.errors_address))
6858 return_path = sender_address;
6860 /* If a router defers an address, add a retry item. Whether or not to
6861 use the local part in the key is a property of the router. */
6863 if ((rc = route_address(addr, &addr_local, &addr_remote, &addr_new,
6864 &addr_succeed, v_none)) == DEFER)
6865 retry_add_item(addr,
6866 addr->router->retry_use_local_part
6867 ? string_sprintf("R:%s@%s", addr->local_part, addr->domain)
6868 : string_sprintf("R:%s", addr->domain),
6871 /* Otherwise, if there is an existing retry record in the database, add
6872 retry items to delete both forms. We must also allow for the possibility
6873 of a routing retry that includes the sender address. Since the domain might
6874 have been rewritten (expanded to fully qualified) as a result of routing,
6875 ensure that the rewritten form is also deleted. */
6877 else if (testflag(addr, af_dr_retry_exists))
6879 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
6881 retry_add_item(addr, altkey, rf_delete);
6882 retry_add_item(addr, addr->address_retry_key, rf_delete);
6883 retry_add_item(addr, addr->domain_retry_key, rf_delete);
6884 if (Ustrcmp(addr->domain, old_domain) != 0)
6885 retry_add_item(addr, string_sprintf("R:%s", old_domain), rf_delete);
6888 /* DISCARD is given for :blackhole: and "seen finish". The event has been
6889 logged, but we need to ensure the address (and maybe parents) is marked
6894 address_done(addr, tod_stamp(tod_log));
6895 continue; /* route next address */
6898 /* The address is finished with (failed or deferred). */
6902 (void)post_process_one(addr, rc, LOG_MAIN, EXIM_DTYPE_ROUTER, 0);
6903 continue; /* route next address */
6906 /* The address has been routed. If the router changed the domain, it will
6907 also have changed the unique address. We have to test whether this address
6908 has already been delivered, because it's the unique address that finally
6911 if ( addr->unique != old_unique
6912 && tree_search(tree_nonrecipients, addr->unique) != 0
6915 DEBUG(D_deliver|D_route) debug_printf("%s was previously delivered: "
6916 "discarded\n", addr->address);
6917 if (addr_remote == addr) addr_remote = addr->next;
6918 else if (addr_local == addr) addr_local = addr->next;
6921 /* If the router has same_domain_copy_routing set, we are permitted to copy
6922 the routing for any other addresses with the same domain. This is an
6923 optimisation to save repeated DNS lookups for "standard" remote domain
6924 routing. The option is settable only on routers that generate host lists.
6925 We play it very safe, and do the optimization only if the address is routed
6926 to a remote transport, there are no header changes, and the domain was not
6927 modified by the router. */
6929 if ( addr_remote == addr
6930 && addr->router->same_domain_copy_routing
6931 && !addr->prop.extra_headers
6932 && !addr->prop.remove_headers
6933 && old_domain == addr->domain
6936 address_item **chain = &addr_route;
6939 address_item *addr2 = *chain;
6940 if (Ustrcmp(addr2->domain, addr->domain) != 0)
6942 chain = &(addr2->next);
6946 /* Found a suitable address; take it off the routing list and add it to
6947 the remote delivery list. */
6949 *chain = addr2->next;
6950 addr2->next = addr_remote;
6951 addr_remote = addr2;
6953 /* Copy the routing data */
6955 addr2->domain = addr->domain;
6956 addr2->router = addr->router;
6957 addr2->transport = addr->transport;
6958 addr2->host_list = addr->host_list;
6959 addr2->fallback_hosts = addr->fallback_hosts;
6960 addr2->prop.errors_address = addr->prop.errors_address;
6961 copyflag(addr2, addr, af_hide_child);
6962 copyflag(addr2, addr, af_local_host_removed);
6964 DEBUG(D_deliver|D_route)
6965 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"
6967 "Routing for %s copied from %s\n",
6968 addr2->address, addr2->address, addr->address);
6971 } /* Continue with routing the next address. */
6972 } /* Loop to process any child addresses that the routers created, and
6973 any rerouted addresses that got put back on the new chain. */
6976 /* Debugging: show the results of the routing */
6978 DEBUG(D_deliver|D_retry|D_route)
6980 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
6981 debug_printf("After routing:\n Local deliveries:\n");
6982 for (address_item * p = addr_local; p; p = p->next)
6983 debug_printf(" %s\n", p->address);
6985 debug_printf(" Remote deliveries:\n");
6986 for (address_item * p = addr_remote; p; p = p->next)
6987 debug_printf(" %s\n", p->address);
6989 debug_printf(" Failed addresses:\n");
6990 for (address_item * p = addr_failed; p; p = p->next)
6991 debug_printf(" %s\n", p->address);
6993 debug_printf(" Deferred addresses:\n");
6994 for (address_item * p = addr_defer; p; p = p->next)
6995 debug_printf(" %s\n", p->address);
6998 /* Free any resources that were cached during routing. */
7003 /* These two variables are set only during routing, after check_local_user.
7004 Ensure they are not set in transports. */
7006 local_user_gid = (gid_t)(-1);
7007 local_user_uid = (uid_t)(-1);
7009 /* Check for any duplicate addresses. This check is delayed until after
7010 routing, because the flexibility of the routing configuration means that
7011 identical addresses with different parentage may end up being redirected to
7012 different addresses. Checking for duplicates too early (as we previously used
7013 to) makes this kind of thing not work. */
7015 do_duplicate_check(&addr_local);
7016 do_duplicate_check(&addr_remote);
7018 /* When acting as an MUA wrapper, we proceed only if all addresses route to a
7019 remote transport. The check that they all end up in one transaction happens in
7020 the do_remote_deliveries() function. */
7023 && (addr_local || addr_failed || addr_defer)
7027 uschar *which, *colon, *msg;
7034 else if (addr_defer)
7037 which = US"deferred";
7045 while (addr->parent) addr = addr->parent;
7050 msg = addr->message;
7052 else colon = msg = US"";
7054 /* We don't need to log here for a forced failure as it will already
7055 have been logged. Defer will also have been logged, but as a defer, so we do
7056 need to do the failure logging. */
7058 if (addr != addr_failed)
7059 log_write(0, LOG_MAIN, "** %s routing yielded a %s delivery",
7060 addr->address, which);
7062 /* Always write an error to the caller */
7064 fprintf(stderr, "routing %s yielded a %s delivery%s%s\n", addr->address,
7067 final_yield = DELIVER_MUA_FAILED;
7068 addr_failed = addr_defer = NULL; /* So that we remove the message */
7069 goto DELIVERY_TIDYUP;
7073 /* If this is a run to continue deliveries to an external channel that is
7074 already set up, defer any local deliveries.
7076 jgh 2020/12/20: I don't see why; locals should be quick.
7077 The defer goes back to version 1.62 in 1997. A local being still deliverable
7078 during a continued run might result from something like a defer during the
7079 original delivery, eg. in a DB lookup. Unlikely but possible.
7081 To avoid delaying a local when combined with a callout-hold for a remote
7082 delivery, test continue_sequence rather than continue_transport. */
7084 if (continue_sequence > 1 && addr_local)
7086 DEBUG(D_deliver|D_retry|D_route)
7087 debug_printf("deferring local deliveries due to continued-transport\n");
7090 address_item * addr = addr_defer;
7091 while (addr->next) addr = addr->next;
7092 addr->next = addr_local;
7095 addr_defer = addr_local;
7100 /* Because address rewriting can happen in the routers, we should not really do
7101 ANY deliveries until all addresses have been routed, so that all recipients of
7102 the message get the same headers. However, this is in practice not always
7103 possible, since sometimes remote addresses give DNS timeouts for days on end.
7104 The pragmatic approach is to deliver what we can now, saving any rewritten
7105 headers so that at least the next lot of recipients benefit from the rewriting
7106 that has already been done.
7108 If any headers have been rewritten during routing, update the spool file to
7109 remember them for all subsequent deliveries. This can be delayed till later if
7110 there is only address to be delivered - if it succeeds the spool write need not
7113 if ( f.header_rewritten
7114 && ( addr_local && (addr_local->next || addr_remote)
7115 || addr_remote && addr_remote->next
7118 /* Panic-dies on error */
7119 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7120 f.header_rewritten = FALSE;
7124 /* If there are any deliveries to do and we do not already have the journal
7125 file, create it. This is used to record successful deliveries as soon as
7126 possible after each delivery is known to be complete. A file opened with
7127 O_APPEND is used so that several processes can run simultaneously.
7129 The journal is just insurance against crashes. When the spool file is
7130 ultimately updated at the end of processing, the journal is deleted. If a
7131 journal is found to exist at the start of delivery, the addresses listed
7132 therein are added to the non-recipients. */
7134 if (addr_local || addr_remote)
7138 uschar * fname = spool_fname(US"input", message_subdir, id, US"-J");
7140 if ((journal_fd = Uopen(fname,
7141 EXIM_CLOEXEC | O_WRONLY|O_APPEND|O_CREAT|O_EXCL, SPOOL_MODE)) < 0)
7143 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't open journal file %s: %s",
7144 fname, strerror(errno));
7145 return DELIVER_NOT_ATTEMPTED;
7148 /* Set the close-on-exec flag, make the file owned by Exim, and ensure
7149 that the mode is correct - the group setting doesn't always seem to get
7150 set automatically. */
7152 if( exim_fchown(journal_fd, exim_uid, exim_gid, fname)
7153 || fchmod(journal_fd, SPOOL_MODE)
7155 || fcntl(journal_fd, F_SETFD, fcntl(journal_fd, F_GETFD) | FD_CLOEXEC)
7159 int ret = Uunlink(fname);
7160 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't set perms on journal file %s: %s",
7161 fname, strerror(errno));
7162 if(ret && errno != ENOENT)
7163 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7164 fname, strerror(errno));
7165 return DELIVER_NOT_ATTEMPTED;
7169 else if (journal_fd >= 0)
7177 /* Now we can get down to the business of actually doing deliveries. Local
7178 deliveries are done first, then remote ones. If ever the problems of how to
7179 handle fallback transports are figured out, this section can be put into a loop
7180 for handling fallbacks, though the uid switching will have to be revised. */
7182 /* Precompile a regex that is used to recognize a parameter in response
7183 to an LHLO command, if is isn't already compiled. This may be used on both
7184 local and remote LMTP deliveries. */
7186 if (!regex_IGNOREQUOTA)
7188 regex_must_compile(US"\\n250[\\s\\-]IGNOREQUOTA(\\s|\\n|$)", MCS_NOFLAGS, TRUE);
7190 /* Handle local deliveries */
7194 DEBUG(D_deliver|D_transport)
7195 debug_printf(">>>>>>>>>>>>>>>> Local deliveries >>>>>>>>>>>>>>>>\n");
7196 do_local_deliveries();
7197 f.disable_logging = FALSE;
7200 /* If queue_run_local is set, we do not want to attempt any remote deliveries,
7201 so just queue them all. */
7203 if (f.queue_run_local)
7206 address_item *addr = addr_remote;
7207 addr_remote = addr->next;
7209 addr->basic_errno = ERRNO_LOCAL_ONLY;
7210 addr->message = US"remote deliveries suppressed";
7211 (void)post_process_one(addr, DEFER, LOG_MAIN, EXIM_DTYPE_TRANSPORT, 0);
7214 /* Handle remote deliveries */
7218 DEBUG(D_deliver|D_transport)
7219 debug_printf(">>>>>>>>>>>>>>>> Remote deliveries >>>>>>>>>>>>>>>>\n");
7221 /* Precompile some regex that are used to recognize parameters in response
7222 to an EHLO command, if they aren't already compiled. */
7224 smtp_deliver_init();
7226 /* Now sort the addresses if required, and do the deliveries. The yield of
7227 do_remote_deliveries is FALSE when mua_wrapper is set and all addresses
7228 cannot be delivered in one transaction. */
7230 if (remote_sort_domains) sort_remote_deliveries();
7231 if (!do_remote_deliveries(FALSE))
7233 log_write(0, LOG_MAIN, "** mua_wrapper is set but recipients cannot all "
7234 "be delivered in one transaction");
7235 fprintf(stderr, "delivery to smarthost failed (configuration problem)\n");
7237 final_yield = DELIVER_MUA_FAILED;
7238 addr_failed = addr_defer = NULL; /* So that we remove the message */
7239 goto DELIVERY_TIDYUP;
7242 /* See if any of the addresses that failed got put on the queue for delivery
7243 to their fallback hosts. We do it this way because often the same fallback
7244 host is used for many domains, so all can be sent in a single transaction
7245 (if appropriately configured). */
7247 if (addr_fallback && !mua_wrapper)
7249 DEBUG(D_deliver) debug_printf("Delivering to fallback hosts\n");
7250 addr_remote = addr_fallback;
7251 addr_fallback = NULL;
7252 if (remote_sort_domains) sort_remote_deliveries();
7253 do_remote_deliveries(TRUE);
7255 f.disable_logging = FALSE;
7259 /* All deliveries are now complete. Ignore SIGTERM during this tidying up
7260 phase, to minimize cases of half-done things. */
7263 debug_printf(">>>>>>>>>>>>>>>> deliveries are done >>>>>>>>>>>>>>>>\n");
7264 cancel_cutthrough_connection(TRUE, US"deliveries are done");
7266 /* Root privilege is no longer needed */
7268 exim_setugid(exim_uid, exim_gid, FALSE, US"post-delivery tidying");
7270 set_process_info("tidying up after delivering %s", message_id);
7271 signal(SIGTERM, SIG_IGN);
7273 /* When we are acting as an MUA wrapper, the smtp transport will either have
7274 succeeded for all addresses, or failed them all in normal cases. However, there
7275 are some setup situations (e.g. when a named port does not exist) that cause an
7276 immediate exit with deferral of all addresses. Convert those into failures. We
7277 do not ever want to retry, nor do we want to send a bounce message. */
7283 address_item * nextaddr;
7284 for (address_item * addr = addr_defer; addr; addr = nextaddr)
7286 log_write(0, LOG_MAIN, "** %s mua_wrapper forced failure for deferred "
7287 "delivery", addr->address);
7288 nextaddr = addr->next;
7289 addr->next = addr_failed;
7295 /* Now all should either have succeeded or failed. */
7298 final_yield = DELIVER_MUA_SUCCEEDED;
7302 uschar *s = addr_failed->user_message;
7304 if (!s) s = addr_failed->message;
7306 fprintf(stderr, "Delivery failed: ");
7307 if (addr_failed->basic_errno > 0)
7309 fprintf(stderr, "%s", strerror(addr_failed->basic_errno));
7310 if (s) fprintf(stderr, ": ");
7312 if ((host = addr_failed->host_used))
7313 fprintf(stderr, "H=%s [%s]: ", host->name, host->address);
7315 fprintf(stderr, "%s", CS s);
7316 else if (addr_failed->basic_errno <= 0)
7317 fprintf(stderr, "unknown error");
7318 fprintf(stderr, "\n");
7320 final_yield = DELIVER_MUA_FAILED;
7325 /* In a normal configuration, we now update the retry database. This is done in
7326 one fell swoop at the end in order not to keep opening and closing (and
7327 locking) the database. The code for handling retries is hived off into a
7328 separate module for convenience. We pass it the addresses of the various
7329 chains, because deferred addresses can get moved onto the failed chain if the
7330 retry cutoff time has expired for all alternative destinations. Bypass the
7331 updating of the database if the -N flag is set, which is a debugging thing that
7332 prevents actual delivery. */
7334 else if (!f.dont_deliver)
7335 retry_update(&addr_defer, &addr_failed, &addr_succeed);
7337 /* Send DSN for successful messages if requested */
7338 addr_senddsn = NULL;
7340 for (address_item * a = addr_succeed; a; a = a->next)
7342 /* af_ignore_error not honored here. it's not an error */
7343 DEBUG(D_deliver) debug_printf("DSN: processing router : %s\n"
7344 "DSN: processing successful delivery address: %s\n"
7345 "DSN: Sender_address: %s\n"
7346 "DSN: orcpt: %s flags: 0x%x\n"
7347 "DSN: envid: %s ret: %d\n"
7348 "DSN: Final recipient: %s\n"
7349 "DSN: Remote SMTP server supports DSN: %d\n",
7350 a->router ? a->router->name : US"(unknown)",
7353 a->dsn_orcpt ? a->dsn_orcpt : US"NULL",
7355 dsn_envid ? dsn_envid : US"NULL", dsn_ret,
7360 /* send report if next hop not DSN aware or a router flagged "last DSN hop"
7361 and a report was requested */
7363 if ( (a->dsn_aware != dsn_support_yes || a->dsn_flags & rf_dsnlasthop)
7364 && a->dsn_flags & rf_notify_success
7367 /* copy and relink address_item and send report with all of them at once later */
7368 address_item * addr_next = addr_senddsn;
7369 addr_senddsn = store_get(sizeof(address_item), GET_UNTAINTED);
7371 addr_senddsn->next = addr_next;
7374 DEBUG(D_deliver) debug_printf("DSN: not sending DSN success message\n");
7382 /* create exim process to send message */
7383 pid = child_open_exim(&fd, US"DSN");
7385 DEBUG(D_deliver) debug_printf("DSN: child_open_exim returns: %d\n", pid);
7387 if (pid < 0) /* Creation of child failed */
7389 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to "
7390 "create child process to send success-dsn message: %s", getpid(),
7391 getppid(), strerror(errno));
7393 DEBUG(D_deliver) debug_printf("DSN: child_open_exim failed\n");
7395 else /* Creation of child succeeded */
7397 FILE * f = fdopen(fd, "wb");
7398 /* header only as required by RFC. only failure DSN needs to honor RET=FULL */
7400 transport_ctx tctx = {{0}};
7403 debug_printf("sending success-dsn to: %s\n", sender_address);
7405 /* build unique id for MIME boundary */
7406 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
7407 DEBUG(D_deliver) debug_printf("DSN: MIME boundary: %s\n", bound);
7409 if (errors_reply_to)
7410 fprintf(f, "Reply-To: %s\n", errors_reply_to);
7413 fprintf(f, "Auto-Submitted: auto-generated\n"
7415 "Subject: Delivery Status Notification\n",
7417 moan_write_references(f, NULL);
7418 fprintf(f, "Content-Type: multipart/report;"
7419 " report-type=delivery-status; boundary=%s\n"
7420 "MIME-Version: 1.0\n\n"
7423 "Content-type: text/plain; charset=us-ascii\n\n"
7425 "This message was created automatically by mail delivery software.\n"
7426 " ----- The following addresses had successful delivery notifications -----\n",
7429 for (address_item * a = addr_senddsn; a; a = a->next)
7430 fprintf(f, "<%s> (relayed %s)\n\n",
7432 a->dsn_flags & rf_dsnlasthop ? "via non DSN router"
7433 : a->dsn_aware == dsn_support_no ? "to non-DSN-aware mailer"
7434 : "via non \"Remote SMTP\" router"
7438 "Content-type: message/delivery-status\n\n"
7439 "Reporting-MTA: dns; %s\n",
7440 bound, smtp_active_hostname);
7443 { /* must be decoded from xtext: see RFC 3461:6.3a */
7445 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
7446 fprintf(f, "Original-Envelope-ID: %s\n", dsn_envid);
7448 fprintf(f, "X-Original-Envelope-ID: error decoding xtext formatted ENVID\n");
7452 for (address_item * a = addr_senddsn; a; a = a->next)
7456 print_dsn_addr_action(f, a, US"delivered", US"2.0.0");
7458 if ((hu = a->host_used) && hu->name)
7459 fprintf(f, "Remote-MTA: dns; %s\nDiagnostic-Code: smtp; 250 Ok\n\n",
7462 fprintf(f, "Diagnostic-Code: X-Exim; relayed via non %s router\n\n",
7463 a->dsn_flags & rf_dsnlasthop ? "DSN" : "SMTP");
7466 fprintf(f, "--%s\nContent-type: text/rfc822-headers\n\n", bound);
7469 transport_filter_argv = NULL; /* Just in case */
7470 return_path = sender_address; /* In case not previously set */
7472 /* Write the original email out */
7475 tctx.options = topt_add_return_path | topt_no_body;
7476 /*XXX hmm, FALSE(fail) retval ignored.
7477 Could error for any number of reasons, and they are not handled. */
7478 transport_write_message(&tctx, 0);
7481 fprintf(f,"\n--%s--\n", bound);
7485 rc = child_close(pid, 0); /* Waits for child to close, no timeout */
7489 /* If any addresses failed, we must send a message to somebody, unless
7490 af_ignore_error is set, in which case no action is taken. It is possible for
7491 several messages to get sent if there are addresses with different
7498 uschar *logtod = tod_stamp(tod_log);
7500 address_item *handled_addr = NULL;
7501 address_item **paddr;
7502 address_item *msgchain = NULL;
7503 address_item **pmsgchain = &msgchain;
7505 /* There are weird cases when logging is disabled in the transport. However,
7506 there may not be a transport (address failed by a router). */
7508 f.disable_logging = FALSE;
7509 if (addr_failed->transport)
7510 f.disable_logging = addr_failed->transport->disable_logging;
7513 debug_printf("processing failed address %s\n", addr_failed->address);
7515 /* There are only two ways an address in a bounce message can get here:
7517 (1) When delivery was initially deferred, but has now timed out (in the call
7518 to retry_update() above). We can detect this by testing for
7519 af_retry_timedout. If the address does not have its own errors address,
7520 we arrange to ignore the error.
7522 (2) If delivery failures for bounce messages are being ignored. We can detect
7523 this by testing for af_ignore_error. This will also be set if a bounce
7524 message has been autothawed and the ignore_bounce_errors_after time has
7525 passed. It might also be set if a router was explicitly configured to
7526 ignore errors (errors_to = "").
7528 If neither of these cases obtains, something has gone wrong. Log the
7529 incident, but then ignore the error. */
7531 if (sender_address[0] == 0 && !addr_failed->prop.errors_address)
7533 if ( !testflag(addr_failed, af_retry_timedout)
7534 && !addr_failed->prop.ignore_error)
7535 log_write(0, LOG_MAIN|LOG_PANIC, "internal error: bounce message "
7536 "failure is neither frozen nor ignored (it's been ignored)");
7538 addr_failed->prop.ignore_error = TRUE;
7541 /* If the first address on the list has af_ignore_error set, just remove
7542 it from the list, throw away any saved message file, log it, and
7543 mark the recipient done. */
7545 if ( addr_failed->prop.ignore_error
7546 || addr_failed->dsn_flags & rf_dsnflags
7547 && !(addr_failed->dsn_flags & rf_notify_failure)
7551 addr_failed = addr->next;
7552 if (addr->return_filename) Uunlink(addr->return_filename);
7554 #ifndef DISABLE_EVENT
7555 msg_event_raise(US"msg:fail:delivery", addr);
7557 log_write(0, LOG_MAIN, "%s%s%s%s: error ignored%s",
7559 !addr->parent ? US"" : US" <",
7560 !addr->parent ? US"" : addr->parent->address,
7561 !addr->parent ? US"" : US">",
7562 addr->prop.ignore_error
7563 ? US"" : US": RFC 3461 DSN, failure notify not requested");
7565 address_done(addr, logtod);
7566 child_done(addr, logtod);
7567 /* Panic-dies on error */
7568 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7571 /* Otherwise, handle the sending of a message. Find the error address for
7572 the first address, then send a message that includes all failed addresses
7573 that have the same error address. Note the bounce_recipient is a global so
7574 that it can be accessed by $bounce_recipient while creating a customized
7579 if (!(bounce_recipient = addr_failed->prop.errors_address))
7580 bounce_recipient = sender_address;
7582 /* Make a subprocess to send a message */
7584 if ((pid = child_open_exim(&fd, US"bounce-message")) < 0)
7585 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to "
7586 "create child process to send failure message: %s", getpid(),
7587 getppid(), strerror(errno));
7589 /* Creation of child succeeded */
7596 uschar *bcc, *emf_text;
7597 FILE * fp = fdopen(fd, "wb");
7599 BOOL to_sender = strcmpic(sender_address, bounce_recipient) == 0;
7600 int max = (bounce_return_size_limit/DELIVER_IN_BUFFER_SIZE + 1) *
7601 DELIVER_IN_BUFFER_SIZE;
7603 uschar *dsnlimitmsg;
7604 uschar *dsnnotifyhdr;
7608 debug_printf("sending error message to: %s\n", bounce_recipient);
7610 /* Scan the addresses for all that have the same errors address, removing
7611 them from the addr_failed chain, and putting them on msgchain. */
7613 paddr = &addr_failed;
7614 for (addr = addr_failed; addr; addr = *paddr)
7615 if (Ustrcmp(bounce_recipient, addr->prop.errors_address
7616 ? addr->prop.errors_address : sender_address) == 0)
7617 { /* The same - dechain */
7618 *paddr = addr->next;
7621 pmsgchain = &(addr->next);
7624 paddr = &addr->next; /* Not the same; skip */
7626 /* Include X-Failed-Recipients: for automatic interpretation, but do
7627 not let any one header line get too long. We do this by starting a
7628 new header every 50 recipients. Omit any addresses for which the
7629 "hide_child" flag is set. */
7631 for (addr = msgchain; addr; addr = addr->next)
7633 if (testflag(addr, af_hide_child)) continue;
7641 ? "X-Failed-Recipients: "
7643 testflag(addr, af_pfr) && addr->parent
7644 ? string_printing(addr->parent->address)
7645 : string_printing(addr->address));
7647 if (rcount > 0) fprintf(fp, "\n");
7649 /* Output the standard headers */
7651 if (errors_reply_to)
7652 fprintf(fp, "Reply-To: %s\n", errors_reply_to);
7653 fprintf(fp, "Auto-Submitted: auto-replied\n");
7654 moan_write_from(fp);
7655 fprintf(fp, "To: %s\n", bounce_recipient);
7656 moan_write_references(fp, NULL);
7658 /* generate boundary string and output MIME-Headers */
7659 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
7661 fprintf(fp, "Content-Type: multipart/report;"
7662 " report-type=delivery-status; boundary=%s\n"
7663 "MIME-Version: 1.0\n",
7666 /* Open a template file if one is provided. Log failure to open, but
7667 carry on - default texts will be used. */
7669 if (bounce_message_file)
7670 emf = expand_open(bounce_message_file,
7671 US"bounce_message_file", US"error");
7673 /* Quietly copy to configured additional addresses if required. */
7675 if ((bcc = moan_check_errorcopy(bounce_recipient)))
7676 fprintf(fp, "Bcc: %s\n", bcc);
7678 /* The texts for the message can be read from a template file; if there
7679 isn't one, or if it is too short, built-in texts are used. The first
7680 emf text is a Subject: and any other headers. */
7682 if ((emf_text = next_emf(emf, US"header")))
7683 fprintf(fp, "%s\n", emf_text);
7685 fprintf(fp, "Subject: Mail delivery failed%s\n\n",
7686 to_sender? ": returning message to sender" : "");
7688 /* output human readable part as text/plain section */
7689 fprintf(fp, "--%s\n"
7690 "Content-type: text/plain; charset=us-ascii\n\n",
7693 if ((emf_text = next_emf(emf, US"intro")))
7694 fprintf(fp, "%s", CS emf_text);
7698 /* This message has been reworded several times. It seems to be confusing to
7699 somebody, however it is worded. I have retreated to the original, simple
7701 "This message was created automatically by mail delivery software.\n");
7703 if (bounce_message_text)
7704 fprintf(fp, "%s", CS bounce_message_text);
7707 "\nA message that you sent could not be delivered to one or more of its\n"
7708 "recipients. This is a permanent error. The following address(es) failed:\n");
7711 "\nA message sent by\n\n <%s>\n\n"
7712 "could not be delivered to one or more of its recipients. The following\n"
7713 "address(es) failed:\n", sender_address);
7717 /* Process the addresses, leaving them on the msgchain if they have a
7718 file name for a return message. (There has already been a check in
7719 post_process_one() for the existence of data in the message file.) A TRUE
7720 return from print_address_information() means that the address is not
7724 for (addr = msgchain; addr; addr = *paddr)
7726 if (print_address_information(addr, fp, US" ", US"\n ", US""))
7727 print_address_error(addr, fp, US"");
7729 /* End the final line for the address */
7733 /* Leave on msgchain if there's a return file. */
7735 if (addr->return_file >= 0)
7737 paddr = &(addr->next);
7741 /* Else save so that we can tick off the recipient when the
7746 *paddr = addr->next;
7747 addr->next = handled_addr;
7748 handled_addr = addr;
7754 /* Get the next text, whether we need it or not, so as to be
7755 positioned for the one after. */
7757 emf_text = next_emf(emf, US"generated text");
7759 /* If there were any file messages passed by the local transports,
7760 include them in the message. Then put the address on the handled chain.
7761 In the case of a batch of addresses that were all sent to the same
7762 transport, the return_file field in all of them will contain the same
7763 fd, and the return_filename field in the *last* one will be set (to the
7764 name of the file). */
7768 address_item *nextaddr;
7771 fprintf(fp, "%s", CS emf_text);
7774 "The following text was generated during the delivery "
7775 "attempt%s:\n", (filecount > 1)? "s" : "");
7777 for (addr = msgchain; addr; addr = nextaddr)
7780 address_item *topaddr = addr;
7782 /* List all the addresses that relate to this file */
7785 while(addr) /* Insurance */
7787 print_address_information(addr, fp, US"------ ", US"\n ",
7789 if (addr->return_filename) break;
7794 /* Now copy the file */
7796 if (!(fm = Ufopen(addr->return_filename, "rb")))
7797 fprintf(fp, " +++ Exim error... failed to open text file: %s\n",
7801 while ((ch = fgetc(fm)) != EOF) fputc(ch, fp);
7804 Uunlink(addr->return_filename);
7806 /* Can now add to handled chain, first fishing off the next
7807 address on the msgchain. */
7809 nextaddr = addr->next;
7810 addr->next = handled_addr;
7811 handled_addr = topaddr;
7816 /* output machine readable part */
7818 if (message_smtputf8)
7819 fprintf(fp, "--%s\n"
7820 "Content-type: message/global-delivery-status\n\n"
7821 "Reporting-MTA: dns; %s\n",
7822 bound, smtp_active_hostname);
7825 fprintf(fp, "--%s\n"
7826 "Content-type: message/delivery-status\n\n"
7827 "Reporting-MTA: dns; %s\n",
7828 bound, smtp_active_hostname);
7832 /* must be decoded from xtext: see RFC 3461:6.3a */
7834 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
7835 fprintf(fp, "Original-Envelope-ID: %s\n", dsn_envid);
7837 fprintf(fp, "X-Original-Envelope-ID: error decoding xtext formatted ENVID\n");
7841 for (addr = handled_addr; addr; addr = addr->next)
7845 print_dsn_addr_action(fp, addr, US"failed", US"5.0.0");
7847 if ((hu = addr->host_used) && hu->name)
7849 fprintf(fp, "Remote-MTA: dns; %s\n", hu->name);
7850 #ifdef EXPERIMENTAL_DSN_INFO
7855 uschar * p = hu->port == 25
7856 ? US"" : string_sprintf(":%d", hu->port);
7857 fprintf(fp, "Remote-MTA: X-ip; [%s]%s\n", hu->address, p);
7859 if ((s = addr->smtp_greeting) && *s)
7860 fprintf(fp, "X-Remote-MTA-smtp-greeting: X-str; %.900s\n", s);
7861 if ((s = addr->helo_response) && *s)
7862 fprintf(fp, "X-Remote-MTA-helo-response: X-str; %.900s\n", s);
7863 if ((s = addr->message) && *s)
7864 fprintf(fp, "X-Exim-Diagnostic: X-str; %.900s\n", s);
7867 print_dsn_diagnostic_code(addr, fp);
7872 /* Now copy the message, trying to give an intelligible comment if
7873 it is too long for it all to be copied. The limit isn't strictly
7874 applied because of the buffering. There is, however, an option
7875 to suppress copying altogether. */
7877 emf_text = next_emf(emf, US"copy");
7880 we ignore the intro text from template and add
7881 the text for bounce_return_size_limit at the end.
7883 bounce_return_message is ignored
7884 in case RET= is defined we honor these values
7885 otherwise bounce_return_body is honored.
7887 bounce_return_size_limit is always honored.
7890 fprintf(fp, "--%s\n", bound);
7892 dsnlimitmsg = US"X-Exim-DSN-Information: Due to administrative limits only headers are returned";
7893 dsnnotifyhdr = NULL;
7894 topt = topt_add_return_path;
7896 /* RET=HDRS? top priority */
7897 if (dsn_ret == dsn_ret_hdrs)
7898 topt |= topt_no_body;
7901 struct stat statbuf;
7903 /* no full body return at all? */
7904 if (!bounce_return_body)
7906 topt |= topt_no_body;
7907 /* add header if we overrule RET=FULL */
7908 if (dsn_ret == dsn_ret_full)
7909 dsnnotifyhdr = dsnlimitmsg;
7911 /* line length limited... return headers only if oversize */
7912 /* size limited ... return headers only if limit reached */
7913 else if ( max_received_linelength > bounce_return_linesize_limit
7914 || ( bounce_return_size_limit > 0
7915 && fstat(deliver_datafile, &statbuf) == 0
7916 && statbuf.st_size > max
7919 topt |= topt_no_body;
7920 dsnnotifyhdr = dsnlimitmsg;
7925 if (message_smtputf8)
7926 fputs(topt & topt_no_body ? "Content-type: message/global-headers\n\n"
7927 : "Content-type: message/global\n\n",
7931 fputs(topt & topt_no_body ? "Content-type: text/rfc822-headers\n\n"
7932 : "Content-type: message/rfc822\n\n",
7936 transport_filter_argv = NULL; /* Just in case */
7937 return_path = sender_address; /* In case not previously set */
7938 { /* Dummy transport for headers add */
7939 transport_ctx tctx = {{0}};
7940 transport_instance tb = {0};
7942 tctx.u.fd = fileno(fp);
7944 tctx.options = topt;
7945 tb.add_headers = dsnnotifyhdr;
7947 /*XXX no checking for failure! buggy! */
7948 transport_write_message(&tctx, 0);
7952 /* we never add the final text. close the file */
7956 fprintf(fp, "\n--%s--\n", bound);
7958 /* Close the file, which should send an EOF to the child process
7959 that is receiving the message. Wait for it to finish. */
7962 rc = child_close(pid, 0); /* Waits for child to close, no timeout */
7964 /* If the process failed, there was some disaster in setting up the
7965 error message. Unless the message is very old, ensure that addr_defer
7966 is non-null, which will have the effect of leaving the message on the
7967 spool. The failed addresses will get tried again next time. However, we
7968 don't really want this to happen too often, so freeze the message unless
7969 there are some genuine deferred addresses to try. To do this we have
7970 to call spool_write_header() here, because with no genuine deferred
7971 addresses the normal code below doesn't get run. */
7976 if (now - received_time.tv_sec < retry_maximum_timeout && !addr_defer)
7978 addr_defer = (address_item *)(+1);
7979 f.deliver_freeze = TRUE;
7980 deliver_frozen_at = time(NULL);
7981 /* Panic-dies on error */
7982 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7985 deliver_msglog("Process failed (%d) when writing error message "
7986 "to %s%s", rc, bounce_recipient, s);
7987 log_write(0, LOG_MAIN, "Process failed (%d) when writing error message "
7988 "to %s%s", rc, bounce_recipient, s);
7991 /* The message succeeded. Ensure that the recipients that failed are
7992 now marked finished with on the spool and their parents updated. */
7996 for (addr = handled_addr; addr; addr = addr->next)
7998 address_done(addr, logtod);
7999 child_done(addr, logtod);
8001 /* Panic-dies on error */
8002 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
8008 f.disable_logging = FALSE; /* In case left set */
8010 /* Come here from the mua_wrapper case if routing goes wrong */
8014 /* If there are now no deferred addresses, we are done. Preserve the
8015 message log if so configured, and we are using them. Otherwise, sling it.
8016 Then delete the message itself. */
8024 fname = spool_fname(US"msglog", message_subdir, id, US"");
8025 if (preserve_message_logs)
8028 uschar * moname = spool_fname(US"msglog.OLD", US"", id, US"");
8030 if ((rc = Urename(fname, moname)) < 0)
8032 (void)directory_make(spool_directory,
8033 spool_sname(US"msglog.OLD", US""),
8034 MSGLOG_DIRECTORY_MODE, TRUE);
8035 rc = Urename(fname, moname);
8038 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to move %s to the "
8039 "msglog.OLD directory", fname);
8042 if (Uunlink(fname) < 0)
8043 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
8044 fname, strerror(errno));
8047 /* Remove the two message files. */
8049 fname = spool_fname(US"input", message_subdir, id, US"-D");
8050 if (Uunlink(fname) < 0)
8051 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
8052 fname, strerror(errno));
8053 fname = spool_fname(US"input", message_subdir, id, US"-H");
8054 if (Uunlink(fname) < 0)
8055 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
8056 fname, strerror(errno));
8058 /* Log the end of this message, with queue time if requested. */
8060 if (LOGGING(queue_time_overall))
8061 log_write(0, LOG_MAIN, "Completed QT=%s", string_timesince(&received_time));
8063 log_write(0, LOG_MAIN, "Completed");
8065 /* Unset deliver_freeze so that we won't try to move the spool files further down */
8066 f.deliver_freeze = FALSE;
8068 #ifndef DISABLE_EVENT
8069 (void) event_raise(event_action, US"msg:complete", NULL, NULL);
8073 /* If there are deferred addresses, we are keeping this message because it is
8074 not yet completed. Lose any temporary files that were catching output from
8075 pipes for any of the deferred addresses, handle one-time aliases, and see if
8076 the message has been on the queue for so long that it is time to send a warning
8077 message to the sender, unless it is a mailer-daemon. If all deferred addresses
8078 have the same domain, we can set deliver_domain for the expansion of
8079 delay_warning_ condition - if any of them are pipes, files, or autoreplies, use
8080 the parent's domain.
8082 If all the deferred addresses have an error number that indicates "retry time
8083 not reached", skip sending the warning message, because it won't contain the
8084 reason for the delay. It will get sent at the next real delivery attempt.
8085 Exception: for retries caused by a remote peer we use the error message
8086 store in the retry DB as the reason.
8087 However, if at least one address has tried, we'd better include all of them in
8090 If we can't make a process to send the message, don't worry.
8092 For mailing list expansions we want to send the warning message to the
8093 mailing list manager. We can't do a perfect job here, as some addresses may
8094 have different errors addresses, but if we take the errors address from
8095 each deferred address it will probably be right in most cases.
8097 If addr_defer == +1, it means there was a problem sending an error message
8098 for failed addresses, and there were no "real" deferred addresses. The value
8099 was set just to keep the message on the spool, so there is nothing to do here.
8102 else if (addr_defer != (address_item *)(+1))
8104 uschar *recipients = US"";
8105 BOOL want_warning_msg = FALSE;
8107 deliver_domain = testflag(addr_defer, af_pfr)
8108 ? addr_defer->parent->domain : addr_defer->domain;
8110 for (address_item * addr = addr_defer; addr; addr = addr->next)
8112 address_item *otaddr;
8114 if (addr->basic_errno > ERRNO_WARN_BASE) want_warning_msg = TRUE;
8118 const uschar *d = testflag(addr, af_pfr)
8119 ? addr->parent->domain : addr->domain;
8121 /* The domain may be unset for an address that has never been routed
8122 because the system filter froze the message. */
8124 if (!d || Ustrcmp(d, deliver_domain) != 0)
8125 deliver_domain = NULL;
8128 if (addr->return_filename) Uunlink(addr->return_filename);
8130 /* Handle the case of one-time aliases. If any address in the ancestry
8131 of this one is flagged, ensure it is in the recipients list, suitably
8132 flagged, and that its parent is marked delivered. */
8134 for (otaddr = addr; otaddr; otaddr = otaddr->parent)
8135 if (otaddr->onetime_parent) break;
8140 int t = recipients_count;
8142 for (i = 0; i < recipients_count; i++)
8144 uschar *r = recipients_list[i].address;
8145 if (Ustrcmp(otaddr->onetime_parent, r) == 0) t = i;
8146 if (Ustrcmp(otaddr->address, r) == 0) break;
8149 /* Didn't find the address already in the list, and did find the
8150 ultimate parent's address in the list, and they really are different
8151 (i.e. not from an identity-redirect). After adding the recipient,
8152 update the errors address in the recipients list. */
8154 if ( i >= recipients_count && t < recipients_count
8155 && Ustrcmp(otaddr->address, otaddr->parent->address) != 0)
8157 DEBUG(D_deliver) debug_printf("one_time: adding %s in place of %s\n",
8158 otaddr->address, otaddr->parent->address);
8159 receive_add_recipient(otaddr->address, t);
8160 recipients_list[recipients_count-1].errors_to = otaddr->prop.errors_address;
8161 tree_add_nonrecipient(otaddr->parent->address);
8162 update_spool = TRUE;
8166 /* Except for error messages, ensure that either the errors address for
8167 this deferred address or, if there is none, the sender address, is on the
8168 list of recipients for a warning message. */
8170 if (sender_address[0])
8172 uschar * s = addr->prop.errors_address;
8173 if (!s) s = sender_address;
8174 if (Ustrstr(recipients, s) == NULL)
8175 recipients = string_sprintf("%s%s%s", recipients,
8176 recipients[0] ? "," : "", s);
8180 /* Send a warning message if the conditions are right. If the condition check
8181 fails because of a lookup defer, there is nothing we can do. The warning
8182 is not sent. Another attempt will be made at the next delivery attempt (if
8185 if ( !f.queue_2stage
8187 && ( !(addr_defer->dsn_flags & rf_dsnflags)
8188 || addr_defer->dsn_flags & rf_notify_delay
8190 && delay_warning[1] > 0
8191 && sender_address[0] != 0
8192 && ( !delay_warning_condition
8193 || expand_check_condition(delay_warning_condition,
8194 US"delay_warning", US"option")
8200 int queue_time = time(NULL) - received_time.tv_sec;
8202 queue_time = test_harness_fudged_queue_time(queue_time);
8204 /* See how many warnings we should have sent by now */
8206 for (count = 0; count < delay_warning[1]; count++)
8207 if (queue_time < delay_warning[count+2]) break;
8209 show_time = delay_warning[count+1];
8211 if (count >= delay_warning[1])
8214 int last_gap = show_time;
8215 if (count > 1) last_gap -= delay_warning[count];
8216 extra = (queue_time - delay_warning[count+1])/last_gap;
8217 show_time += last_gap * extra;
8223 debug_printf("time on queue = %s id %s addr %s\n",
8224 readconf_printtime(queue_time), message_id, addr_defer->address);
8225 debug_printf("warning counts: required %d done %d\n", count,
8229 /* We have computed the number of warnings there should have been by now.
8230 If there haven't been enough, send one, and up the count to what it should
8233 if (warning_count < count)
8237 pid_t pid = child_open_exim(&fd, US"delay-warning-message");
8243 FILE * f = fdopen(fd, "wb");
8245 transport_ctx tctx = {{0}};
8247 if (warn_message_file)
8248 wmf = expand_open(warn_message_file,
8249 US"warn_message_file", US"warning");
8251 warnmsg_recipients = recipients;
8252 warnmsg_delay = queue_time < 120*60
8253 ? string_sprintf("%d minutes", show_time/60)
8254 : string_sprintf("%d hours", show_time/3600);
8256 if (errors_reply_to)
8257 fprintf(f, "Reply-To: %s\n", errors_reply_to);
8258 fprintf(f, "Auto-Submitted: auto-replied\n");
8260 fprintf(f, "To: %s\n", recipients);
8261 moan_write_references(f, NULL);
8263 /* generated boundary string and output MIME-Headers */
8264 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
8266 fprintf(f, "Content-Type: multipart/report;"
8267 " report-type=delivery-status; boundary=%s\n"
8268 "MIME-Version: 1.0\n",
8271 if ((wmf_text = next_emf(wmf, US"header")))
8272 fprintf(f, "%s\n", wmf_text);
8274 fprintf(f, "Subject: Warning: message %s delayed %s\n\n",
8275 message_id, warnmsg_delay);
8277 /* output human readable part as text/plain section */
8279 "Content-type: text/plain; charset=us-ascii\n\n",
8282 if ((wmf_text = next_emf(wmf, US"intro")))
8283 fprintf(f, "%s", CS wmf_text);
8287 "This message was created automatically by mail delivery software.\n");
8289 if (Ustrcmp(recipients, sender_address) == 0)
8291 "A message that you sent has not yet been delivered to one or more of its\n"
8292 "recipients after more than ");
8296 "A message sent by\n\n <%s>\n\n"
8297 "has not yet been delivered to one or more of its recipients after more than \n",
8300 fprintf(f, "%s on the queue on %s.\n\n"
8301 "The message identifier is: %s\n",
8302 warnmsg_delay, primary_hostname, message_id);
8304 for (h = header_list; h; h = h->next)
8305 if (strncmpic(h->text, US"Subject:", 8) == 0)
8306 fprintf(f, "The subject of the message is: %s", h->text + 9);
8307 else if (strncmpic(h->text, US"Date:", 5) == 0)
8308 fprintf(f, "The date of the message is: %s", h->text + 6);
8311 fprintf(f, "The address%s to which the message has not yet been "
8313 !addr_defer->next ? "" : "es",
8314 !addr_defer->next ? "is": "are");
8317 /* List the addresses, with error information if allowed */
8320 for (address_item * addr = addr_defer; addr; addr = addr->next)
8322 if (print_address_information(addr, f, US" ", US"\n ", US""))
8323 print_address_error(addr, f, US"Delay reason: ");
8332 if ((wmf_text = next_emf(wmf, US"final")))
8333 fprintf(f, "%s", CS wmf_text);
8339 "No action is required on your part. Delivery attempts will continue for\n"
8340 "some time, and this warning may be repeated at intervals if the message\n"
8341 "remains undelivered. Eventually the mail delivery software will give up,\n"
8342 "and when that happens, the message will be returned to you.\n");
8345 /* output machine readable part */
8346 fprintf(f, "\n--%s\n"
8347 "Content-type: message/delivery-status\n\n"
8348 "Reporting-MTA: dns; %s\n",
8350 smtp_active_hostname);
8355 /* must be decoded from xtext: see RFC 3461:6.3a */
8357 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
8358 fprintf(f,"Original-Envelope-ID: %s\n", dsn_envid);
8360 fprintf(f,"X-Original-Envelope-ID: error decoding xtext formatted ENVID\n");
8364 for (address_item * addr = addr_defer; addr; addr = addr->next)
8368 print_dsn_addr_action(f, addr, US"delayed", US"4.0.0");
8370 if ((hu = addr->host_used) && hu->name)
8372 fprintf(f, "Remote-MTA: dns; %s\n", hu->name);
8373 print_dsn_diagnostic_code(addr, f);
8379 "Content-type: text/rfc822-headers\n\n",
8383 /* header only as required by RFC. only failure DSN needs to honor RET=FULL */
8384 tctx.u.fd = fileno(f);
8385 tctx.options = topt_add_return_path | topt_no_body;
8386 transport_filter_argv = NULL; /* Just in case */
8387 return_path = sender_address; /* In case not previously set */
8389 /* Write the original email out */
8390 /*XXX no checking for failure! buggy! */
8391 transport_write_message(&tctx, 0);
8394 fprintf(f,"\n--%s--\n", bound);
8398 /* Close and wait for child process to complete, without a timeout.
8399 If there's an error, don't update the count. */
8402 if (child_close(pid, 0) == 0)
8404 warning_count = count;
8405 update_spool = TRUE; /* Ensure spool rewritten */
8411 /* Clear deliver_domain */
8413 deliver_domain = NULL;
8415 /* If this was a first delivery attempt, unset the first time flag, and
8416 ensure that the spool gets updated. */
8418 if (f.deliver_firsttime && !f.queue_2stage)
8420 f.deliver_firsttime = FALSE;
8421 update_spool = TRUE;
8424 /* If delivery was frozen and freeze_tell is set, generate an appropriate
8425 message, unless the message is a local error message (to avoid loops). Then
8426 log the freezing. If the text in "frozen_info" came from a system filter,
8427 it has been escaped into printing characters so as not to mess up log lines.
8428 For the "tell" message, we turn \n back into newline. Also, insert a newline
8429 near the start instead of the ": " string. */
8431 if (f.deliver_freeze)
8433 if (freeze_tell && freeze_tell[0] != 0 && !f.local_error_message)
8435 uschar *s = string_copy(frozen_info);
8436 uschar *ss = Ustrstr(s, " by the system filter: ");
8447 if (*ss == '\\' && ss[1] == 'n')
8454 moan_tell_someone(freeze_tell, addr_defer, US"Message frozen",
8455 "Message %s has been frozen%s.\nThe sender is <%s>.\n", message_id,
8459 /* Log freezing just before we update the -H file, to minimize the chance
8460 of a race problem. */
8462 deliver_msglog("*** Frozen%s\n", frozen_info);
8463 log_write(0, LOG_MAIN, "Frozen%s", frozen_info);
8466 /* If there have been any updates to the non-recipients list, or other things
8467 that get written to the spool, we must now update the spool header file so
8468 that it has the right information for the next delivery attempt. If there
8469 was more than one address being delivered, the header_change update is done
8470 earlier, in case one succeeds and then something crashes. */
8473 debug_printf("delivery deferred: update_spool=%d header_rewritten=%d\n",
8474 update_spool, f.header_rewritten);
8476 if (update_spool || f.header_rewritten)
8477 /* Panic-dies on error */
8478 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
8481 /* Finished with the message log. If the message is complete, it will have
8482 been unlinked or renamed above. */
8484 if (message_logs) (void)fclose(message_log);
8486 /* Now we can close and remove the journal file. Its only purpose is to record
8487 successfully completed deliveries asap so that this information doesn't get
8488 lost if Exim (or the machine) crashes. Forgetting about a failed delivery is
8489 not serious, as trying it again is not harmful. The journal might not be open
8490 if all addresses were deferred at routing or directing. Nevertheless, we must
8491 remove it if it exists (may have been lying around from a crash during the
8492 previous delivery attempt). We don't remove the journal if a delivery
8493 subprocess failed to pass back delivery information; this is controlled by
8494 the remove_journal flag. When the journal is left, we also don't move the
8495 message off the main spool if frozen and the option is set. It should get moved
8496 at the next attempt, after the journal has been inspected. */
8498 if (journal_fd >= 0) (void)close(journal_fd);
8502 uschar * fname = spool_fname(US"input", message_subdir, id, US"-J");
8504 if (Uunlink(fname) < 0 && errno != ENOENT)
8505 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s", fname,
8508 /* Move the message off the spool if requested */
8510 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
8511 if (f.deliver_freeze && move_frozen_messages)
8512 (void)spool_move_message(id, message_subdir, US"", US"F");
8516 /* Closing the data file frees the lock; if the file has been unlinked it
8517 will go away. Otherwise the message becomes available for another process
8520 (void)close(deliver_datafile);
8521 deliver_datafile = -1;
8522 DEBUG(D_deliver) debug_printf("end delivery of %s\n", id);
8523 #ifdef MEASURE_TIMING
8524 report_time_since(×tamp_startup, US"delivery end"); /* testcase 0005 */
8527 /* It is unlikely that there will be any cached resources, since they are
8528 released after routing, and in the delivery subprocesses. However, it's
8529 possible for an expansion for something afterwards (for example,
8530 expand_check_condition) to do a lookup. We must therefore be sure everything is
8534 acl_where = ACL_WHERE_UNKNOWN;
8543 #ifdef EXIM_TFO_PROBE
8546 f.tcp_fastopen_ok = TRUE;
8552 /* Called from a commandline, or from the daemon, to do a delivery.
8553 We need to regain privs; do this by exec of the exim binary. */
8556 delivery_re_exec(int exec_type)
8560 if (cutthrough.cctx.sock >= 0 && cutthrough.callout_hold_only)
8562 int channel_fd = cutthrough.cctx.sock;
8564 smtp_peer_options = cutthrough.peer_options;
8565 continue_sequence = 0;
8568 if (cutthrough.is_tls)
8572 smtp_peer_options |= OPTION_TLS;
8573 sending_ip_address = cutthrough.snd_ip;
8574 sending_port = cutthrough.snd_port;
8576 where = US"socketpair";
8577 if (socketpair(AF_UNIX, SOCK_STREAM, 0, pfd) != 0)
8581 testharness_pause_ms(150);
8582 if ((pid = exim_fork(US"tls-proxy-interproc")) < 0)
8585 if (pid == 0) /* child: will fork again to totally disconnect */
8587 smtp_proxy_tls(cutthrough.cctx.tls_ctx, big_buffer, big_buffer_size,
8588 pfd, 5*60, cutthrough.host.name);
8589 /* does not return */
8593 waitpid(pid, NULL, 0);
8594 (void) close(channel_fd); /* release the client socket */
8595 channel_fd = pfd[1];
8599 transport_do_pass_socket(cutthrough.transport, cutthrough.host.name,
8600 cutthrough.host.address, message_id, channel_fd);
8604 cancel_cutthrough_connection(TRUE, US"non-continued delivery");
8605 (void) child_exec_exim(exec_type, FALSE, NULL, FALSE, 2, US"-Mc", message_id);
8607 return; /* compiler quietening; control does not reach here. */
8612 LOG_MAIN | (exec_type == CEE_EXEC_EXIT ? LOG_PANIC : LOG_PANIC_DIE),
8613 "delivery re-exec %s failed: %s", where, strerror(errno));
8615 /* Get here if exec_type == CEE_EXEC_EXIT.
8616 Note: this must be _exit(), not exit(). */
8618 _exit(EX_EXECFAILED);
8624 /* End of deliver.c */