1 /* $Cambridge: exim/src/src/routers/redirect.c,v 1.5 2005/02/17 11:58:27 ph10 Exp $ */
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
7 /* Copyright (c) University of Cambridge 1995 - 2005 */
8 /* See the file NOTICE for conditions of use and distribution. */
12 #include "rf_functions.h"
17 /* Options specific to the redirect router. */
19 optionlist redirect_router_options[] = {
20 { "allow_defer", opt_bit | (RDON_DEFER << 16),
21 (void *)offsetof(redirect_router_options_block, bit_options) },
22 { "allow_fail", opt_bit | (RDON_FAIL << 16),
23 (void *)offsetof(redirect_router_options_block, bit_options) },
24 { "allow_filter", opt_bit | (RDON_FILTER << 16),
25 (void *)offsetof(redirect_router_options_block, bit_options) },
26 { "allow_freeze", opt_bit | (RDON_FREEZE << 16),
27 (void *)offsetof(redirect_router_options_block, bit_options) },
28 { "check_ancestor", opt_bool,
29 (void *)offsetof(redirect_router_options_block, check_ancestor) },
30 { "check_group", opt_bool,
31 (void *)offsetof(redirect_router_options_block, check_group) },
32 { "check_owner", opt_bool,
33 (void *)offsetof(redirect_router_options_block, check_owner) },
34 { "data", opt_stringptr,
35 (void *)offsetof(redirect_router_options_block, data) },
36 { "directory_transport",opt_stringptr,
37 (void *)offsetof(redirect_router_options_block, directory_transport_name) },
38 { "file", opt_stringptr,
39 (void *)offsetof(redirect_router_options_block, file) },
40 { "file_transport", opt_stringptr,
41 (void *)offsetof(redirect_router_options_block, file_transport_name) },
42 { "forbid_blackhole", opt_bit | (RDON_BLACKHOLE << 16),
43 (void *)offsetof(redirect_router_options_block, bit_options) },
44 { "forbid_exim_filter", opt_bit | (RDON_EXIM_FILTER << 16),
45 (void *)offsetof(redirect_router_options_block, bit_options) },
46 { "forbid_file", opt_bool,
47 (void *)offsetof(redirect_router_options_block, forbid_file) },
48 { "forbid_filter_existstest", opt_bit | (RDON_EXISTS << 16),
49 (void *)offsetof(redirect_router_options_block, bit_options) },
50 { "forbid_filter_logwrite",opt_bit | (RDON_LOG << 16),
51 (void *)offsetof(redirect_router_options_block, bit_options) },
52 { "forbid_filter_lookup", opt_bit | (RDON_LOOKUP << 16),
53 (void *)offsetof(redirect_router_options_block, bit_options) },
55 { "forbid_filter_perl", opt_bit | (RDON_PERL << 16),
56 (void *)offsetof(redirect_router_options_block, bit_options) },
58 { "forbid_filter_readfile", opt_bit | (RDON_READFILE << 16),
59 (void *)offsetof(redirect_router_options_block, bit_options) },
60 { "forbid_filter_readsocket", opt_bit | (RDON_READSOCK << 16),
61 (void *)offsetof(redirect_router_options_block, bit_options) },
62 { "forbid_filter_reply",opt_bool,
63 (void *)offsetof(redirect_router_options_block, forbid_filter_reply) },
64 { "forbid_filter_run", opt_bit | (RDON_RUN << 16),
65 (void *)offsetof(redirect_router_options_block, bit_options) },
66 { "forbid_include", opt_bit | (RDON_INCLUDE << 16),
67 (void *)offsetof(redirect_router_options_block, bit_options) },
68 { "forbid_pipe", opt_bool,
69 (void *)offsetof(redirect_router_options_block, forbid_pipe) },
70 { "forbid_sieve_filter",opt_bit | (RDON_SIEVE_FILTER << 16),
71 (void *)offsetof(redirect_router_options_block, bit_options) },
72 { "hide_child_in_errmsg", opt_bool,
73 (void *)offsetof(redirect_router_options_block, hide_child_in_errmsg) },
74 { "ignore_eacces", opt_bit | (RDON_EACCES << 16),
75 (void *)offsetof(redirect_router_options_block, bit_options) },
76 { "ignore_enotdir", opt_bit | (RDON_ENOTDIR << 16),
77 (void *)offsetof(redirect_router_options_block, bit_options) },
78 { "include_directory", opt_stringptr,
79 (void *)offsetof(redirect_router_options_block, include_directory) },
80 { "modemask", opt_octint,
81 (void *)offsetof(redirect_router_options_block, modemask) },
82 { "one_time", opt_bool,
83 (void *)offsetof(redirect_router_options_block, one_time) },
84 { "owners", opt_uidlist,
85 (void *)offsetof(redirect_router_options_block, owners) },
86 { "owngroups", opt_gidlist,
87 (void *)offsetof(redirect_router_options_block, owngroups) },
88 { "pipe_transport", opt_stringptr,
89 (void *)offsetof(redirect_router_options_block, pipe_transport_name) },
90 { "qualify_domain", opt_stringptr,
91 (void *)offsetof(redirect_router_options_block, qualify_domain) },
92 { "qualify_preserve_domain", opt_bool,
93 (void *)offsetof(redirect_router_options_block, qualify_preserve_domain) },
94 { "repeat_use", opt_bool | opt_public,
95 (void *)offsetof(router_instance, repeat_use) },
96 { "reply_transport", opt_stringptr,
97 (void *)offsetof(redirect_router_options_block, reply_transport_name) },
98 { "rewrite", opt_bit | (RDON_REWRITE << 16),
99 (void *)offsetof(redirect_router_options_block, bit_options) },
100 { "sieve_vacation_directory", opt_stringptr,
101 (void *)offsetof(redirect_router_options_block, sieve_vacation_directory) },
102 { "skip_syntax_errors", opt_bool,
103 (void *)offsetof(redirect_router_options_block, skip_syntax_errors) },
104 #ifdef EXPERIMENTAL_SRS
105 { "srs", opt_stringptr,
106 (void *)offsetof(redirect_router_options_block, srs) },
107 { "srs_alias", opt_stringptr,
108 (void *)offsetof(redirect_router_options_block, srs_alias) },
109 { "srs_condition", opt_stringptr,
110 (void *)offsetof(redirect_router_options_block, srs_condition) },
111 { "srs_db", opt_stringptr,
112 (void *)offsetof(redirect_router_options_block, srs_db) },
114 { "syntax_errors_text", opt_stringptr,
115 (void *)offsetof(redirect_router_options_block, syntax_errors_text) },
116 { "syntax_errors_to", opt_stringptr,
117 (void *)offsetof(redirect_router_options_block, syntax_errors_to) }
120 /* Size of the options list. An extern variable has to be used so that its
121 address can appear in the tables drtables.c. */
123 int redirect_router_options_count =
124 sizeof(redirect_router_options)/sizeof(optionlist);
126 /* Default private options block for the redirect router. */
128 redirect_router_options_block redirect_router_option_defaults = {
129 NULL, /* directory_transport */
130 NULL, /* file_transport */
131 NULL, /* pipe_transport */
132 NULL, /* reply_transport */
134 NULL, /* directory_transport_name */
137 NULL, /* file_transport_name */
138 NULL, /* include_directory */
139 NULL, /* pipe_transport_name */
140 NULL, /* reply_transport_name */
141 NULL, /* sieve_vacation_directory */
142 NULL, /* syntax_errors_text */
143 NULL, /* syntax_errors_to */
144 NULL, /* qualify_domain */
146 NULL, /* owngroups */
147 #ifdef EXPERIMENTAL_SRS
149 NULL, /* srs_condition */
151 NULL, /* srs_alias */
154 RDO_REWRITE, /* bit_options */
155 FALSE, /* check_ancestor */
156 TRUE_UNSET, /* check_owner */
157 TRUE_UNSET, /* check_group */
158 FALSE, /* forbid_file */
159 FALSE, /* forbid_filter_reply */
160 FALSE, /* forbid_pipe */
161 FALSE, /* hide_child_in_errmsg */
162 FALSE, /* one_time */
163 FALSE, /* qualify_preserve_domain */
164 FALSE /* skip_syntax_errors */
169 /*************************************************
170 * Initialization entry point *
171 *************************************************/
173 /* Called for each instance, after its options have been read, to enable
174 consistency checks to be done, or anything else that needs to be set up. */
176 void redirect_router_init(router_instance *rblock)
178 redirect_router_options_block *ob =
179 (redirect_router_options_block *)(rblock->options_block);
181 /* Either file or data must be set, but not both */
183 if ((ob->file == NULL) == (ob->data == NULL))
184 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s router:\n "
185 "%sone of \"file\" or \"data\" must be specified",
186 rblock->name, (ob->file == NULL)? "" : "only ");
188 /* Onetime aliases can only be real addresses. Headers can't be manipulated. */
192 ob->forbid_pipe = ob->forbid_file = ob->forbid_filter_reply = TRUE;
193 if (rblock->extra_headers != NULL || rblock->remove_headers != NULL)
194 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s router:\n "
195 "\"headers_add\" and \"headers_remove\" are not permitted with "
196 "\"one_time\"", rblock->name);
199 /* The defaults for check_owner and check_group depend on other settings. The
200 defaults are: Check the owner if check_local_user or owners is set; check the
201 group if check_local_user is set without a restriction on the group write bit,
202 or if owngroups is set. */
204 if (ob->check_owner == TRUE_UNSET)
205 ob->check_owner = rblock->check_local_user ||
206 (ob->owners != NULL && ob->owners[0] != 0);
208 if (ob->check_group == TRUE_UNSET)
209 ob->check_group = (rblock->check_local_user && (ob->modemask & 020) == 0) ||
210 (ob->owngroups != NULL && ob->owngroups[0] != 0);
212 /* If explicit qualify domain set, the preserve option is locked out */
214 if (ob->qualify_domain != NULL && ob->qualify_preserve_domain)
215 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s router:\n "
216 "only one of \"qualify_domain\" or \"qualify_preserve_domain\" must be set",
219 /* If allow_filter is set, either user or check_local_user must be set. */
221 if (!rblock->check_local_user &&
223 rblock->expand_uid == NULL &&
224 (ob->bit_options & RDO_FILTER) != 0)
225 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s router:\n "
226 "\"user\" or \"check_local_user\" must be set with \"allow_filter\"",
232 /*************************************************
233 * Get errors address and header mods *
234 *************************************************/
236 /* This function is called when new addresses are generated, in order to
237 sort out errors address and header modifications. We put the errors address
238 into the parent address (even though it is never used from there because that
239 address is never transported) so that it can be retrieved if any of the
240 children gets routed by an "unseen" router. The clone of the child that is
241 passed on must have the original errors_address value.
244 rblock the router control block
245 addr the address being routed
246 verify true if verifying
247 addr_prop point to the propagated block, which is where the
248 new values are to be placed
250 Returns: the result of rf_get_errors_address() or rf_get_munge_headers(),
251 which is either OK or DEFER
255 sort_errors_and_headers(router_instance *rblock, address_item *addr,
256 BOOL verify, address_item_propagated *addr_prop)
258 int frc = rf_get_errors_address(addr, rblock, verify,
259 &(addr_prop->errors_address));
260 if (frc != OK) return frc;
261 addr->p.errors_address = addr_prop->errors_address;
262 return rf_get_munge_headers(addr, rblock, &(addr_prop->extra_headers),
263 &(addr_prop->remove_headers));
268 /*************************************************
269 * Process a set of generated new addresses *
270 *************************************************/
272 /* This function sets up a set of newly generated child addresses and puts them
273 on the new address chain. Copy in the uid, gid and permission flags for use by
274 pipes and files, set the parent, and "or" its af_ignore_error flag. Also record
275 the setting for any starting router.
277 If the generated address is the same as one of its ancestors, and the
278 check_ancestor flag is set, do not use this generated address, but replace it
279 with a copy of the input address. This is to cope with cases where A is aliased
280 to B and B has a .forward file pointing to A, though it is usually set on the
281 forwardfile rather than the aliasfile. We can't just pass on the old
282 address by returning FAIL, because it must act as a general parent for
283 generated addresses, and only get marked "done" when all its children are
288 addr_new new address chain
289 addr original address
290 generated list of generated addresses
291 addr_prop the propagated block, containing the errors_address,
292 header modification stuff, and address_data
293 ugidptr points to uid/gid data for files, pipes, autoreplies
294 pw password entry, set if ob->check_local_user is TRUE
300 add_generated(router_instance *rblock, address_item **addr_new,
301 address_item *addr, address_item *generated,
302 address_item_propagated *addr_prop, ugid_block *ugidptr, struct passwd *pw)
304 redirect_router_options_block *ob =
305 (redirect_router_options_block *)(rblock->options_block);
307 while (generated != NULL)
309 address_item *parent;
310 address_item *next = generated;
311 uschar *errors_address = next->p.errors_address;
313 generated = next->next;
315 orflag(next, addr, af_ignore_error);
316 next->start_router = rblock->redirect_router;
319 next->next = *addr_new;
322 /* Don't do the "one_time" thing for the first pass of a 2-stage queue run. */
324 if (ob->one_time && !queue_2stage)
326 for (parent = addr; parent->parent != NULL; parent = parent->parent);
327 next->onetime_parent = parent->address;
330 if (ob->hide_child_in_errmsg) setflag(next, af_hide_child);
332 /* If check_ancestor is set, we want to know if any ancestor of this address
333 is the address we are about to generate. The check must be done caselessly
334 unless the ancestor was routed by a case-sensitive router. */
336 if (ob->check_ancestor)
338 for (parent = addr; parent != NULL; parent = parent->parent)
340 if (((parent->router != NULL && parent->router->caseful_local_part)?
341 Ustrcmp(next->address, parent->address)
343 strcmpic(next->address, parent->address)
346 DEBUG(D_route) debug_printf("generated parent replaced by child\n");
347 next->address = string_copy(addr->address);
353 /* A user filter may, under some circumstances, set up an errors address.
354 If so, we must take care to re-instate it when we copy in the propagated
355 data so that it overrides any errors_to setting on the router. */
357 next->p = *addr_prop;
358 if (errors_address != NULL) next->p.errors_address = errors_address;
360 /* For pipes, files, and autoreplies, record this router as handling them,
361 because they don't go through the routing process again. Then set up uid,
362 gid, home and current directories for transporting. */
364 if (testflag(next, af_pfr))
366 next->router = rblock;
367 rf_set_ugid(next, ugidptr); /* Will contain pw values if not overridden */
369 /* When getting the home directory out of the password information, wrap it
370 in \N...\N to avoid expansion later. In Cygwin, home directories can
371 contain $ characters. */
373 if (rblock->home_directory != NULL)
374 next->home_dir = rblock->home_directory;
375 else if (rblock->check_local_user)
376 next->home_dir = string_sprintf("\\N%s\\N", pw->pw_dir);
377 else if (rblock->router_home_directory != NULL &&
378 testflag(addr, af_home_expanded))
380 next->home_dir = deliver_home;
381 setflag(next, af_home_expanded);
384 next->current_dir = rblock->current_directory;
386 /* Permission options */
388 if (!ob->forbid_pipe) setflag(next, af_allow_pipe);
389 if (!ob->forbid_file) setflag(next, af_allow_file);
390 if (!ob->forbid_filter_reply) setflag(next, af_allow_reply);
392 /* If the transport setting fails, the error gets picked up at the outer
393 level from the setting of basic_errno in the address. */
395 if (next->address[0] == '|')
397 address_pipe = next->address;
398 if (rf_get_transport(ob->pipe_transport_name, &(ob->pipe_transport),
399 next, rblock->name, US"pipe_transport"))
400 next->transport = ob->pipe_transport;
403 else if (next->address[0] == '>')
405 if (rf_get_transport(ob->reply_transport_name, &(ob->reply_transport),
406 next, rblock->name, US"reply_transport"))
407 next->transport = ob->reply_transport;
409 else /* must be file or directory */
411 int len = Ustrlen(next->address);
412 address_file = next->address;
413 if (next->address[len-1] == '/')
415 if (rf_get_transport(ob->directory_transport_name,
416 &(ob->directory_transport), next, rblock->name,
417 US"directory_transport"))
418 next->transport = ob->directory_transport;
422 if (rf_get_transport(ob->file_transport_name, &(ob->file_transport),
423 next, rblock->name, US"file_transport"))
424 next->transport = ob->file_transport;
432 debug_printf("%s router generated %s\n %serrors_to=%s transport=%s\n",
435 testflag(next, af_pfr)? "pipe, file, or autoreply\n " : "",
436 next->p.errors_address,
437 (next->transport == NULL)? US"NULL" : next->transport->name);
439 if (testflag(next, af_uid_set))
440 debug_printf(" uid=%ld ", (long int)(next->uid));
442 debug_printf(" uid=unset ");
444 if (testflag(next, af_gid_set))
445 debug_printf("gid=%ld ", (long int)(next->gid));
447 debug_printf("gid=unset ");
449 debug_printf("home=%s\n", next->home_dir);
455 /*************************************************
457 *************************************************/
459 /* See local README for interface description. This router returns:
462 . empty address list, or filter did nothing significant
465 . verifying the errors address caused a deferment or a big disaster such
466 as an expansion failure (rf_get_errors_address)
467 . expanding a headers_{add,remove} string caused a deferment or another
468 expansion error (rf_get_munge_headers)
469 . :defer: or "freeze" in a filter
470 . error in address list or filter
471 . skipped syntax errors, but failed to send the message
474 . address was :blackhole:d or "seen finish"ed
480 . new addresses added to addr_new
483 int redirect_router_entry(
484 router_instance *rblock, /* data for this instantiation */
485 address_item *addr, /* address we are working on */
486 struct passwd *pw, /* passwd entry after check_local_user */
487 BOOL verify, /* TRUE when verifying */
488 address_item **addr_local, /* add it to this if it's local */
489 address_item **addr_remote, /* add it to this if it's remote */
490 address_item **addr_new, /* put new addresses on here */
491 address_item **addr_succeed) /* put old address here on success */
493 redirect_router_options_block *ob =
494 (redirect_router_options_block *)(rblock->options_block);
495 address_item *generated = NULL;
496 uschar *save_qualify_domain_recipient = qualify_domain_recipient;
497 uschar *discarded = US"discarded";
498 address_item_propagated addr_prop;
499 error_block *eblock = NULL;
501 redirect_block redirect;
502 int filtertype = FILTER_UNSET;
504 int options = ob->bit_options;
508 addr_local = addr_local; /* Keep picky compilers happy */
509 addr_remote = addr_remote;
511 /* Initialize the data to be propagated to the children */
513 addr_prop.address_data = deliver_address_data;
514 addr_prop.domain_data = deliver_domain_data;
515 addr_prop.localpart_data = deliver_localpart_data;
516 addr_prop.errors_address = NULL;
517 addr_prop.extra_headers = NULL;
518 addr_prop.remove_headers = NULL;
520 /* When verifying and testing addresses, the "logwrite" command in filters
523 if (!verify && !address_test_mode) options |= RDO_REALLOG;
525 /* Sort out the fixed or dynamic uid/gid. This uid is used (a) for reading the
526 file (and interpreting a filter) and (b) for running the transports for
527 generated file and pipe addresses. It is not (necessarily) the same as the uids
528 that may own the file. Exim panics if an expanded string is not a number and
529 can't be found in the password file. Other errors set the freezing bit. */
531 if (!rf_get_ugid(rblock, addr, &ugid)) return DEFER;
533 if (!ugid.uid_set && pw != NULL)
535 ugid.uid = pw->pw_uid;
539 if (!ugid.gid_set && pw != NULL)
541 ugid.gid = pw->pw_gid;
545 #ifdef EXPERIMENTAL_SRS
546 /* For reverse SRS, fill the srs_recipient expandsion variable,
547 on failure, return decline/fail as relevant */
552 if(ob->srs_condition != NULL)
553 usesrs = expand_check_condition(ob->srs_condition, "srs_condition expansion failed", NULL);
556 if(Ustrcmp(ob->srs, "reverse") == 0 || Ustrcmp(ob->srs, "reverseandforward") == 0)
561 srs_orig_recipient = addr->address;
564 eximsrs_db_set(TRUE, ob->srs_db);
565 if((n_srs = eximsrs_reverse(&res, addr->address)) != OK)
570 debug_printf("SRS: Recipient '%s' rewritten to '%s'\n", srs_orig_recipient, srs_recipient);
575 /* Call the function that interprets redirection data, either inline or from a
576 file. This is a separate function so that the system filter can use it. It will
577 run the function in a subprocess if necessary. If qualify_preserve_domain is
578 set, temporarily reset qualify_domain_recipient to the current domain so that
579 any unqualified addresses get qualified with the same domain as the incoming
580 address. Otherwise, if a local qualify_domain is provided, set that up. */
582 if (ob->qualify_preserve_domain)
583 qualify_domain_recipient = addr->domain;
584 else if (ob->qualify_domain != NULL)
586 uschar *new_qdr = rf_expand_data(addr, ob->qualify_domain, &xrc);
587 if (new_qdr == NULL) return xrc;
588 qualify_domain_recipient = new_qdr;
591 redirect.owners = ob->owners;
592 redirect.owngroups = ob->owngroups;
593 redirect.modemask = ob->modemask;
594 redirect.check_owner = ob->check_owner;
595 redirect.check_group = ob->check_group;
598 if (ob->file != NULL)
600 redirect.string = ob->file;
601 redirect.isfile = TRUE;
605 redirect.string = ob->data;
606 redirect.isfile = FALSE;
609 frc = rda_interpret(&redirect, options, ob->include_directory,
610 ob->sieve_vacation_directory, &ugid, &generated, &(addr->message),
611 ob->skip_syntax_errors? &eblock : NULL, &filtertype,
612 string_sprintf("%s router (recipient is %s)", rblock->name, addr->address));
614 qualify_domain_recipient = save_qualify_domain_recipient;
616 /* Handle exceptional returns from filtering or processing an address list.
617 For FAIL and FREEZE we honour any previously set up deliveries by a filter. */
622 addr->message = addr->user_message = NULL;
626 DEBUG(D_route) debug_printf("address :blackhole:d\n");
628 discarded = US":blackhole:";
632 /* FF_DEFER and FF_FAIL can arise only as a result of explicit commands
633 (:fail: in an alias file or "fail" in a filter). If a configured message was
634 supplied, allow it to be included in an SMTP response after verifying. */
637 if (addr->message == NULL) addr->message = US"forced defer";
638 else addr->user_message = addr->message;
642 if ((xrc = sort_errors_and_headers(rblock, addr, verify, &addr_prop)) != OK)
644 add_generated(rblock, addr_new, addr, generated, &addr_prop, &ugid, pw);
645 if (addr->message == NULL) addr->message = US"forced rejection";
646 else addr->user_message = addr->message;
649 /* As in the case of a system filter, a freeze does not happen after a manual
650 thaw. In case deliveries were set up by the filter, we set the child count
651 high so that their completion does not mark the original address done. */
654 if (!deliver_manual_thaw)
656 if ((xrc = sort_errors_and_headers(rblock, addr, verify, &addr_prop))
658 add_generated(rblock, addr_new, addr, generated, &addr_prop, &ugid, pw);
659 if (addr->message == NULL) addr->message = US"frozen by filter";
660 addr->special_action = SPECIAL_FREEZE;
661 addr->child_count = 9999;
664 frc = FF_NOTDELIVERED;
667 /* Handle syntax errors and :include: failures and lookup defers */
672 /* If filtertype is still FILTER_UNSET, it means that the redirection data
673 was never inspected, so the error was an expansion failure or failure to open
674 the file, or whatever. In these cases, the existing error message is probably
677 if (filtertype == FILTER_UNSET) return DEFER;
679 /* If it was a filter and skip_syntax_errors is set, we want to set up
680 the error message so that it can be logged and mailed to somebody. */
682 if (filtertype != FILTER_FORWARD && ob->skip_syntax_errors)
684 eblock = store_get(sizeof(error_block));
686 eblock->text1 = addr->message;
687 eblock->text2 = NULL;
688 addr->message = addr->user_message = NULL;
691 /* Otherwise set up the error for the address and defer. */
695 addr->basic_errno = ERRNO_BADREDIRECT;
696 addr->message = string_sprintf("error in %s %s: %s",
697 (filtertype != FILTER_FORWARD)? "filter" : "redirect",
698 (ob->data == NULL)? "file" : "data",
705 /* Yield is either FF_DELIVERED (significant action) or FF_NOTDELIVERED (no
706 significant action). Before dealing with these, however, we must handle the
707 effect of skip_syntax_errors.
709 If skip_syntax_errors was set and there were syntax errors in an address list,
710 error messages will be present in eblock. Log them and send a message if so
711 configured. We cannot do this earlier, because the error message must not be
712 sent as the local user. If there were no valid addresses, generated will be
713 NULL. In this case, the router declines.
715 For a filter file, the error message has been fudged into an eblock. After
716 dealing with it, the router declines. */
720 if (!moan_skipped_syntax_errors(
721 rblock->name, /* For message content */
723 (verify || address_test_mode)?
724 NULL : ob->syntax_errors_to, /* Who to mail */
725 generated != NULL, /* True if not all failed */
726 ob->syntax_errors_text)) /* Custom message */
729 if (filtertype != FILTER_FORWARD || generated == NULL)
731 addr->message = US"syntax error in redirection data";
736 /* Sort out the errors address and any header modifications, and handle the
737 generated addresses, if any. If there are no generated addresses, we must avoid
738 calling sort_errors_and_headers() in case this router declines - that function
739 may modify the errors_address field in the current address, and we don't want
740 to do that for a decline. */
742 if (generated != NULL)
744 if ((xrc = sort_errors_and_headers(rblock, addr, verify, &addr_prop)) != OK)
746 add_generated(rblock, addr_new, addr, generated, &addr_prop, &ugid, pw);
749 /* FF_DELIVERED with no generated addresses is what we get when an address list
750 contains :blackhole: or a filter contains "seen finish" without having
751 generated anything. Log what happened to this address, and return DISCARD. */
753 if (frc == FF_DELIVERED)
755 if (generated == NULL && !verify && !address_test_mode)
757 log_write(0, LOG_MAIN, "=> %s <%s> R=%s", discarded, addr->address,
763 /* For an address list, FF_NOTDELIVERED always means that no addresses were
764 generated. For a filter, addresses may or may not have been generated. If none
765 were, it's the same as an empty address list, and the router declines. However,
766 if addresses were generated, we can't just decline because successful delivery
767 of the base address gets it marked "done", so deferred generated addresses
768 never get tried again. We have to generate a new version of the base address,
769 as if there were a "deliver" command in the filter file, with the original
770 address as parent. */
776 if (generated == NULL) return DECLINE;
778 next = deliver_make_addr(addr->address, FALSE);
781 next->next = *addr_new;
784 /* Copy relevant flags (af_propagate is a name for the set), and set the
785 data that propagates. */
787 copyflag(next, addr, af_propagate);
790 DEBUG(D_route) debug_printf("%s router autogenerated %s\n%s%s%s",
793 (addr_prop.errors_address != NULL)? " errors to " : "",
794 (addr_prop.errors_address != NULL)? addr_prop.errors_address : US"",
795 (addr_prop.errors_address != NULL)? "\n" : "");
798 #ifdef EXPERIMENTAL_SRS
799 /* On successful redirection, check for SRS forwarding and adjust sender */
804 if(ob->srs_condition != NULL)
805 usesrs = expand_check_condition(ob->srs_condition, "srs_condition expansion failed", NULL);
808 if((Ustrcmp(ob->srs, "forward") == 0 || Ustrcmp(ob->srs, "reverseandforward") == 0) && !verify)
814 srs_orig_sender = sender_address;
817 eximsrs_db_set(FALSE, ob->srs_db);
819 if(ob->srs_alias != NULL ? (usedomain = expand_string(ob->srs_alias)) == NULL : 1)
820 usedomain = deliver_domain;
822 if((n_srs = eximsrs_forward(&res, sender_address, usedomain)) != OK)
824 sender_address = res;
826 debug_printf("SRS: Sender '%s' rewritten to '%s'\n", srs_orig_sender, sender_address);
831 /* Control gets here only when the address has been completely handled. Put the
832 original address onto the succeed queue so that any retry items that get
833 attached to it get processed. */
835 addr->next = *addr_succeed;
836 *addr_succeed = addr;
841 /* End of routers/redirect.c */