1 /* $Cambridge: exim/src/src/routers/redirect.c,v 1.18 2006/11/20 11:43:40 ph10 Exp $ */
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
7 /* Copyright (c) University of Cambridge 1995 - 2006 */
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 { "filter_prepend_home",opt_bit | (RDON_PREPEND_HOME << 16),
43 (void *)offsetof(redirect_router_options_block, bit_options) },
44 { "forbid_blackhole", opt_bit | (RDON_BLACKHOLE << 16),
45 (void *)offsetof(redirect_router_options_block, bit_options) },
46 { "forbid_exim_filter", opt_bit | (RDON_EXIM_FILTER << 16),
47 (void *)offsetof(redirect_router_options_block, bit_options) },
48 { "forbid_file", opt_bool,
49 (void *)offsetof(redirect_router_options_block, forbid_file) },
50 { "forbid_filter_dlfunc", opt_bit | (RDON_DLFUNC << 16),
51 (void *)offsetof(redirect_router_options_block, bit_options) },
52 { "forbid_filter_existstest", opt_bit | (RDON_EXISTS << 16),
53 (void *)offsetof(redirect_router_options_block, bit_options) },
54 { "forbid_filter_logwrite",opt_bit | (RDON_LOG << 16),
55 (void *)offsetof(redirect_router_options_block, bit_options) },
56 { "forbid_filter_lookup", opt_bit | (RDON_LOOKUP << 16),
57 (void *)offsetof(redirect_router_options_block, bit_options) },
58 { "forbid_filter_perl", opt_bit | (RDON_PERL << 16),
59 (void *)offsetof(redirect_router_options_block, bit_options) },
60 { "forbid_filter_readfile", opt_bit | (RDON_READFILE << 16),
61 (void *)offsetof(redirect_router_options_block, bit_options) },
62 { "forbid_filter_readsocket", opt_bit | (RDON_READSOCK << 16),
63 (void *)offsetof(redirect_router_options_block, bit_options) },
64 { "forbid_filter_reply",opt_bool,
65 (void *)offsetof(redirect_router_options_block, forbid_filter_reply) },
66 { "forbid_filter_run", opt_bit | (RDON_RUN << 16),
67 (void *)offsetof(redirect_router_options_block, bit_options) },
68 { "forbid_include", opt_bit | (RDON_INCLUDE << 16),
69 (void *)offsetof(redirect_router_options_block, bit_options) },
70 { "forbid_pipe", opt_bool,
71 (void *)offsetof(redirect_router_options_block, forbid_pipe) },
72 { "forbid_sieve_filter",opt_bit | (RDON_SIEVE_FILTER << 16),
73 (void *)offsetof(redirect_router_options_block, bit_options) },
74 { "forbid_smtp_code", opt_bool,
75 (void *)offsetof(redirect_router_options_block, forbid_smtp_code) },
76 { "hide_child_in_errmsg", opt_bool,
77 (void *)offsetof(redirect_router_options_block, hide_child_in_errmsg) },
78 { "ignore_eacces", opt_bit | (RDON_EACCES << 16),
79 (void *)offsetof(redirect_router_options_block, bit_options) },
80 { "ignore_enotdir", opt_bit | (RDON_ENOTDIR << 16),
81 (void *)offsetof(redirect_router_options_block, bit_options) },
82 { "include_directory", opt_stringptr,
83 (void *)offsetof(redirect_router_options_block, include_directory) },
84 { "modemask", opt_octint,
85 (void *)offsetof(redirect_router_options_block, modemask) },
86 { "one_time", opt_bool,
87 (void *)offsetof(redirect_router_options_block, one_time) },
88 { "owners", opt_uidlist,
89 (void *)offsetof(redirect_router_options_block, owners) },
90 { "owngroups", opt_gidlist,
91 (void *)offsetof(redirect_router_options_block, owngroups) },
92 { "pipe_transport", opt_stringptr,
93 (void *)offsetof(redirect_router_options_block, pipe_transport_name) },
94 { "qualify_domain", opt_stringptr,
95 (void *)offsetof(redirect_router_options_block, qualify_domain) },
96 { "qualify_preserve_domain", opt_bool,
97 (void *)offsetof(redirect_router_options_block, qualify_preserve_domain) },
98 { "repeat_use", opt_bool | opt_public,
99 (void *)offsetof(router_instance, repeat_use) },
100 { "reply_transport", opt_stringptr,
101 (void *)offsetof(redirect_router_options_block, reply_transport_name) },
102 { "rewrite", opt_bit | (RDON_REWRITE << 16),
103 (void *)offsetof(redirect_router_options_block, bit_options) },
104 { "sieve_subaddress", opt_stringptr,
105 (void *)offsetof(redirect_router_options_block, sieve_subaddress) },
106 { "sieve_useraddress", opt_stringptr,
107 (void *)offsetof(redirect_router_options_block, sieve_useraddress) },
108 { "sieve_vacation_directory", opt_stringptr,
109 (void *)offsetof(redirect_router_options_block, sieve_vacation_directory) },
110 { "skip_syntax_errors", opt_bool,
111 (void *)offsetof(redirect_router_options_block, skip_syntax_errors) },
112 #ifdef EXPERIMENTAL_SRS
113 { "srs", opt_stringptr,
114 (void *)offsetof(redirect_router_options_block, srs) },
115 { "srs_alias", opt_stringptr,
116 (void *)offsetof(redirect_router_options_block, srs_alias) },
117 { "srs_condition", opt_stringptr,
118 (void *)offsetof(redirect_router_options_block, srs_condition) },
119 { "srs_dbinsert", opt_stringptr,
120 (void *)offsetof(redirect_router_options_block, srs_dbinsert) },
121 { "srs_dbselect", opt_stringptr,
122 (void *)offsetof(redirect_router_options_block, srs_dbselect) },
124 { "syntax_errors_text", opt_stringptr,
125 (void *)offsetof(redirect_router_options_block, syntax_errors_text) },
126 { "syntax_errors_to", opt_stringptr,
127 (void *)offsetof(redirect_router_options_block, syntax_errors_to) }
130 /* Size of the options list. An extern variable has to be used so that its
131 address can appear in the tables drtables.c. */
133 int redirect_router_options_count =
134 sizeof(redirect_router_options)/sizeof(optionlist);
136 /* Default private options block for the redirect router. */
138 redirect_router_options_block redirect_router_option_defaults = {
139 NULL, /* directory_transport */
140 NULL, /* file_transport */
141 NULL, /* pipe_transport */
142 NULL, /* reply_transport */
144 NULL, /* directory_transport_name */
147 NULL, /* file_transport_name */
148 NULL, /* include_directory */
149 NULL, /* pipe_transport_name */
150 NULL, /* reply_transport_name */
151 NULL, /* sieve_subaddress */
152 NULL, /* sieve_useraddress */
153 NULL, /* sieve_vacation_directory */
154 NULL, /* syntax_errors_text */
155 NULL, /* syntax_errors_to */
156 NULL, /* qualify_domain */
158 NULL, /* owngroups */
159 #ifdef EXPERIMENTAL_SRS
161 NULL, /* srs_alias */
162 NULL, /* srs_condition */
163 NULL, /* srs_dbinsert */
164 NULL, /* srs_dbselect */
167 RDO_REWRITE | RDO_PREPEND_HOME, /* bit_options */
168 FALSE, /* check_ancestor */
169 TRUE_UNSET, /* check_owner */
170 TRUE_UNSET, /* check_group */
171 FALSE, /* forbid_file */
172 FALSE, /* forbid_filter_reply */
173 FALSE, /* forbid_pipe */
174 FALSE, /* forbid_smtp_code */
175 FALSE, /* hide_child_in_errmsg */
176 FALSE, /* one_time */
177 FALSE, /* qualify_preserve_domain */
178 FALSE /* skip_syntax_errors */
183 /*************************************************
184 * Initialization entry point *
185 *************************************************/
187 /* Called for each instance, after its options have been read, to enable
188 consistency checks to be done, or anything else that needs to be set up. */
190 void redirect_router_init(router_instance *rblock)
192 redirect_router_options_block *ob =
193 (redirect_router_options_block *)(rblock->options_block);
195 /* Either file or data must be set, but not both */
197 if ((ob->file == NULL) == (ob->data == NULL))
198 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s router:\n "
199 "%sone of \"file\" or \"data\" must be specified",
200 rblock->name, (ob->file == NULL)? "" : "only ");
202 /* Onetime aliases can only be real addresses. Headers can't be manipulated.
203 The combination of one_time and unseen is not allowed. We can't check the
204 expansion of "unseen" here, but we assume that if it is set to anything other
205 than false, there is likely to be a problem. */
209 ob->forbid_pipe = ob->forbid_file = ob->forbid_filter_reply = TRUE;
210 if (rblock->extra_headers != NULL || rblock->remove_headers != NULL)
211 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s router:\n "
212 "\"headers_add\" and \"headers_remove\" are not permitted with "
213 "\"one_time\"", rblock->name);
214 if (rblock->unseen || rblock->expand_unseen != NULL)
215 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s router:\n "
216 "\"unseen\" may not be used with \"one_time\"", rblock->name);
219 /* The defaults for check_owner and check_group depend on other settings. The
220 defaults are: Check the owner if check_local_user or owners is set; check the
221 group if check_local_user is set without a restriction on the group write bit,
222 or if owngroups is set. */
224 if (ob->check_owner == TRUE_UNSET)
225 ob->check_owner = rblock->check_local_user ||
226 (ob->owners != NULL && ob->owners[0] != 0);
228 if (ob->check_group == TRUE_UNSET)
229 ob->check_group = (rblock->check_local_user && (ob->modemask & 020) == 0) ||
230 (ob->owngroups != NULL && ob->owngroups[0] != 0);
232 /* If explicit qualify domain set, the preserve option is locked out */
234 if (ob->qualify_domain != NULL && ob->qualify_preserve_domain)
235 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s router:\n "
236 "only one of \"qualify_domain\" or \"qualify_preserve_domain\" must be set",
239 /* If allow_filter is set, either user or check_local_user must be set. */
241 if (!rblock->check_local_user &&
243 rblock->expand_uid == NULL &&
244 (ob->bit_options & RDO_FILTER) != 0)
245 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s router:\n "
246 "\"user\" or \"check_local_user\" must be set with \"allow_filter\"",
252 /*************************************************
253 * Get errors address and header mods *
254 *************************************************/
256 /* This function is called when new addresses are generated, in order to
257 sort out errors address and header modifications. We put the errors address
258 into the parent address (even though it is never used from there because that
259 address is never transported) so that it can be retrieved if any of the
260 children gets routed by an "unseen" router. The clone of the child that is
261 passed on must have the original errors_address value.
264 rblock the router control block
265 addr the address being routed
266 verify v_none/v_recipient/v_sender/v_expn
267 addr_prop point to the propagated block, which is where the
268 new values are to be placed
270 Returns: the result of rf_get_errors_address() or rf_get_munge_headers(),
271 which is either OK or DEFER
275 sort_errors_and_headers(router_instance *rblock, address_item *addr,
276 int verify, address_item_propagated *addr_prop)
278 int frc = rf_get_errors_address(addr, rblock, verify,
279 &(addr_prop->errors_address));
280 if (frc != OK) return frc;
281 addr->p.errors_address = addr_prop->errors_address;
282 return rf_get_munge_headers(addr, rblock, &(addr_prop->extra_headers),
283 &(addr_prop->remove_headers));
288 /*************************************************
289 * Process a set of generated new addresses *
290 *************************************************/
292 /* This function sets up a set of newly generated child addresses and puts them
293 on the new address chain. Copy in the uid, gid and permission flags for use by
294 pipes and files, set the parent, and "or" its af_ignore_error flag. Also record
295 the setting for any starting router.
297 If the generated address is the same as one of its ancestors, and the
298 check_ancestor flag is set, do not use this generated address, but replace it
299 with a copy of the input address. This is to cope with cases where A is aliased
300 to B and B has a .forward file pointing to A, though it is usually set on the
301 forwardfile rather than the aliasfile. We can't just pass on the old
302 address by returning FAIL, because it must act as a general parent for
303 generated addresses, and only get marked "done" when all its children are
308 addr_new new address chain
309 addr original address
310 generated list of generated addresses
311 addr_prop the propagated block, containing the errors_address,
312 header modification stuff, and address_data
313 ugidptr points to uid/gid data for files, pipes, autoreplies
314 pw password entry, set if ob->check_local_user is TRUE
320 add_generated(router_instance *rblock, address_item **addr_new,
321 address_item *addr, address_item *generated,
322 address_item_propagated *addr_prop, ugid_block *ugidptr, struct passwd *pw)
324 redirect_router_options_block *ob =
325 (redirect_router_options_block *)(rblock->options_block);
327 while (generated != NULL)
329 address_item *parent;
330 address_item *next = generated;
331 uschar *errors_address = next->p.errors_address;
333 generated = next->next;
335 orflag(next, addr, af_ignore_error);
336 next->start_router = rblock->redirect_router;
339 next->next = *addr_new;
342 /* Don't do the "one_time" thing for the first pass of a 2-stage queue run. */
344 if (ob->one_time && !queue_2stage)
346 for (parent = addr; parent->parent != NULL; parent = parent->parent);
347 next->onetime_parent = parent->address;
350 if (ob->hide_child_in_errmsg) setflag(next, af_hide_child);
352 /* If check_ancestor is set, we want to know if any ancestor of this address
353 is the address we are about to generate. The check must be done caselessly
354 unless the ancestor was routed by a case-sensitive router. */
356 if (ob->check_ancestor)
358 for (parent = addr; parent != NULL; parent = parent->parent)
360 if (((parent->router != NULL && parent->router->caseful_local_part)?
361 Ustrcmp(next->address, parent->address)
363 strcmpic(next->address, parent->address)
366 DEBUG(D_route) debug_printf("generated parent replaced by child\n");
367 next->address = string_copy(addr->address);
373 /* A user filter may, under some circumstances, set up an errors address.
374 If so, we must take care to re-instate it when we copy in the propagated
375 data so that it overrides any errors_to setting on the router. */
377 next->p = *addr_prop;
378 if (errors_address != NULL) next->p.errors_address = errors_address;
380 /* For pipes, files, and autoreplies, record this router as handling them,
381 because they don't go through the routing process again. Then set up uid,
382 gid, home and current directories for transporting. */
384 if (testflag(next, af_pfr))
386 next->router = rblock;
387 rf_set_ugid(next, ugidptr); /* Will contain pw values if not overridden */
389 /* When getting the home directory out of the password information, wrap it
390 in \N...\N to avoid expansion later. In Cygwin, home directories can
391 contain $ characters. */
393 if (rblock->home_directory != NULL)
394 next->home_dir = rblock->home_directory;
395 else if (rblock->check_local_user)
396 next->home_dir = string_sprintf("\\N%s\\N", pw->pw_dir);
397 else if (rblock->router_home_directory != NULL &&
398 testflag(addr, af_home_expanded))
400 next->home_dir = deliver_home;
401 setflag(next, af_home_expanded);
404 next->current_dir = rblock->current_directory;
406 /* Permission options */
408 if (!ob->forbid_pipe) setflag(next, af_allow_pipe);
409 if (!ob->forbid_file) setflag(next, af_allow_file);
410 if (!ob->forbid_filter_reply) setflag(next, af_allow_reply);
412 /* If the transport setting fails, the error gets picked up at the outer
413 level from the setting of basic_errno in the address. */
415 if (next->address[0] == '|')
417 address_pipe = next->address;
418 if (rf_get_transport(ob->pipe_transport_name, &(ob->pipe_transport),
419 next, rblock->name, US"pipe_transport"))
420 next->transport = ob->pipe_transport;
423 else if (next->address[0] == '>')
425 if (rf_get_transport(ob->reply_transport_name, &(ob->reply_transport),
426 next, rblock->name, US"reply_transport"))
427 next->transport = ob->reply_transport;
429 else /* must be file or directory */
431 int len = Ustrlen(next->address);
432 address_file = next->address;
433 if (next->address[len-1] == '/')
435 if (rf_get_transport(ob->directory_transport_name,
436 &(ob->directory_transport), next, rblock->name,
437 US"directory_transport"))
438 next->transport = ob->directory_transport;
442 if (rf_get_transport(ob->file_transport_name, &(ob->file_transport),
443 next, rblock->name, US"file_transport"))
444 next->transport = ob->file_transport;
452 debug_printf("%s router generated %s\n %serrors_to=%s transport=%s\n",
455 testflag(next, af_pfr)? "pipe, file, or autoreply\n " : "",
456 next->p.errors_address,
457 (next->transport == NULL)? US"NULL" : next->transport->name);
459 if (testflag(next, af_uid_set))
460 debug_printf(" uid=%ld ", (long int)(next->uid));
462 debug_printf(" uid=unset ");
464 if (testflag(next, af_gid_set))
465 debug_printf("gid=%ld ", (long int)(next->gid));
467 debug_printf("gid=unset ");
469 debug_printf("home=%s\n", next->home_dir);
475 /*************************************************
477 *************************************************/
479 /* See local README for interface description. This router returns:
482 . empty address list, or filter did nothing significant
485 . verifying the errors address caused a deferment or a big disaster such
486 as an expansion failure (rf_get_errors_address)
487 . expanding a headers_{add,remove} string caused a deferment or another
488 expansion error (rf_get_munge_headers)
489 . :defer: or "freeze" in a filter
490 . error in address list or filter
491 . skipped syntax errors, but failed to send the message
494 . address was :blackhole:d or "seen finish"ed
500 . new addresses added to addr_new
503 int redirect_router_entry(
504 router_instance *rblock, /* data for this instantiation */
505 address_item *addr, /* address we are working on */
506 struct passwd *pw, /* passwd entry after check_local_user */
507 int verify, /* v_none/v_recipient/v_sender/v_expn */
508 address_item **addr_local, /* add it to this if it's local */
509 address_item **addr_remote, /* add it to this if it's remote */
510 address_item **addr_new, /* put new addresses on here */
511 address_item **addr_succeed) /* put old address here on success */
513 redirect_router_options_block *ob =
514 (redirect_router_options_block *)(rblock->options_block);
515 address_item *generated = NULL;
516 uschar *save_qualify_domain_recipient = qualify_domain_recipient;
517 uschar *discarded = US"discarded";
518 address_item_propagated addr_prop;
519 error_block *eblock = NULL;
521 redirect_block redirect;
522 int filtertype = FILTER_UNSET;
524 int options = ob->bit_options;
528 addr_local = addr_local; /* Keep picky compilers happy */
529 addr_remote = addr_remote;
531 /* Initialize the data to be propagated to the children */
533 addr_prop.address_data = deliver_address_data;
534 addr_prop.domain_data = deliver_domain_data;
535 addr_prop.localpart_data = deliver_localpart_data;
536 addr_prop.errors_address = NULL;
537 addr_prop.extra_headers = NULL;
538 addr_prop.remove_headers = NULL;
540 #ifdef EXPERIMENTAL_SRS
541 addr_prop.srs_sender = NULL;
544 /* When verifying and testing addresses, the "logwrite" command in filters
547 if (verify == v_none && !address_test_mode) options |= RDO_REALLOG;
549 /* Sort out the fixed or dynamic uid/gid. This uid is used (a) for reading the
550 file (and interpreting a filter) and (b) for running the transports for
551 generated file and pipe addresses. It is not (necessarily) the same as the uids
552 that may own the file. Exim panics if an expanded string is not a number and
553 can't be found in the password file. Other errors set the freezing bit. */
555 if (!rf_get_ugid(rblock, addr, &ugid)) return DEFER;
557 if (!ugid.uid_set && pw != NULL)
559 ugid.uid = pw->pw_uid;
563 if (!ugid.gid_set && pw != NULL)
565 ugid.gid = pw->pw_gid;
569 #ifdef EXPERIMENTAL_SRS
570 /* Perform SRS on recipient/return-path as required */
576 if(ob->srs_condition != NULL)
577 usesrs = expand_check_condition(ob->srs_condition, "srs_condition expansion failed", NULL);
581 int srs_action = 0, n_srs;
585 /* What are we doing? */
586 if(Ustrcmp(ob->srs, "forward") == 0)
588 else if(Ustrcmp(ob->srs, "reverseandforward") == 0)
592 if((ob->srs_dbinsert == NULL) ^ (ob->srs_dbselect == NULL))
595 else if(Ustrcmp(ob->srs, "reverse") == 0)
601 srs_orig_recipient = addr->address;
605 eximsrs_db_set(TRUE, ob->srs_dbselect);
606 /* Comment this out for now...
608 // eximsrs_db_set(TRUE, NULL);
611 if((n_srs = eximsrs_reverse(&res, addr->address)) == OK)
615 debug_printf("SRS (reverse): Recipient '%s' rewritten to '%s'\n", srs_orig_recipient, srs_recipient);
625 /* No point in actually performing SRS if we are just verifying a recipient */
626 if((srs_action & 1) && verify == v_none &&
627 (sender_address ? sender_address[0] != 0 : FALSE))
630 srs_orig_sender = sender_address;
633 eximsrs_db_set(FALSE, ob->srs_dbinsert);
634 /* Comment this out for now...
636 // eximsrs_db_set(FALSE, NULL);
639 if(ob->srs_alias != NULL ? (usedomain = expand_string(ob->srs_alias)) == NULL : 1)
640 usedomain = deliver_domain;
642 if((n_srs = eximsrs_forward(&res, sender_address, usedomain)) == OK)
644 addr_prop.srs_sender = res;
646 debug_printf("SRS (forward): Sender '%s' rewritten to '%s'\n", srs_orig_sender, res);
658 /* Call the function that interprets redirection data, either inline or from a
659 file. This is a separate function so that the system filter can use it. It will
660 run the function in a subprocess if necessary. If qualify_preserve_domain is
661 set, temporarily reset qualify_domain_recipient to the current domain so that
662 any unqualified addresses get qualified with the same domain as the incoming
663 address. Otherwise, if a local qualify_domain is provided, set that up. */
665 if (ob->qualify_preserve_domain)
666 qualify_domain_recipient = addr->domain;
667 else if (ob->qualify_domain != NULL)
669 uschar *new_qdr = rf_expand_data(addr, ob->qualify_domain, &xrc);
670 if (new_qdr == NULL) return xrc;
671 qualify_domain_recipient = new_qdr;
674 redirect.owners = ob->owners;
675 redirect.owngroups = ob->owngroups;
676 redirect.modemask = ob->modemask;
677 redirect.check_owner = ob->check_owner;
678 redirect.check_group = ob->check_group;
681 if (ob->file != NULL)
683 redirect.string = ob->file;
684 redirect.isfile = TRUE;
688 redirect.string = ob->data;
689 redirect.isfile = FALSE;
692 frc = rda_interpret(&redirect, options, ob->include_directory,
693 ob->sieve_vacation_directory, ob->sieve_useraddress, ob->sieve_subaddress,
694 &ugid, &generated, &(addr->message), ob->skip_syntax_errors? &eblock : NULL,
695 &filtertype, string_sprintf("%s router (recipient is %s)", rblock->name,
698 qualify_domain_recipient = save_qualify_domain_recipient;
700 /* Handle exceptional returns from filtering or processing an address list.
701 For FAIL and FREEZE we honour any previously set up deliveries by a filter. */
706 addr->message = addr->user_message = NULL;
710 DEBUG(D_route) debug_printf("address :blackhole:d\n");
712 discarded = US":blackhole:";
716 /* FF_DEFER and FF_FAIL can arise only as a result of explicit commands
717 (:defer: or :fail: in an alias file or "fail" in a filter). If a configured
718 message was supplied, allow it to be included in an SMTP response after
719 verifying. Remove any SMTP code if it is not allowed. */
726 if ((xrc = sort_errors_and_headers(rblock, addr, verify, &addr_prop)) != OK)
728 add_generated(rblock, addr_new, addr, generated, &addr_prop, &ugid, pw);
732 if (addr->message == NULL)
733 addr->message = (yield == FAIL)? US"forced rejection" : US"forced defer";
737 if (ob->forbid_smtp_code &&
738 pcre_exec(regex_smtp_code, NULL, CS addr->message,
739 Ustrlen(addr->message), 0, PCRE_EOPT,
740 ovector, sizeof(ovector)/sizeof(int)) >= 0)
742 DEBUG(D_route) debug_printf("SMTP code at start of error message "
743 "is ignored because forbid_smtp_code is set\n");
744 addr->message += ovector[1];
746 addr->user_message = addr->message;
747 setflag(addr, af_pass_message);
751 /* As in the case of a system filter, a freeze does not happen after a manual
752 thaw. In case deliveries were set up by the filter, we set the child count
753 high so that their completion does not mark the original address done. */
756 if (!deliver_manual_thaw)
758 if ((xrc = sort_errors_and_headers(rblock, addr, verify, &addr_prop))
760 add_generated(rblock, addr_new, addr, generated, &addr_prop, &ugid, pw);
761 if (addr->message == NULL) addr->message = US"frozen by filter";
762 addr->special_action = SPECIAL_FREEZE;
763 addr->child_count = 9999;
766 frc = FF_NOTDELIVERED;
769 /* Handle syntax errors and :include: failures and lookup defers */
774 /* If filtertype is still FILTER_UNSET, it means that the redirection data
775 was never inspected, so the error was an expansion failure or failure to open
776 the file, or whatever. In these cases, the existing error message is probably
779 if (filtertype == FILTER_UNSET) return DEFER;
781 /* If it was a filter and skip_syntax_errors is set, we want to set up
782 the error message so that it can be logged and mailed to somebody. */
784 if (filtertype != FILTER_FORWARD && ob->skip_syntax_errors)
786 eblock = store_get(sizeof(error_block));
788 eblock->text1 = addr->message;
789 eblock->text2 = NULL;
790 addr->message = addr->user_message = NULL;
793 /* Otherwise set up the error for the address and defer. */
797 addr->basic_errno = ERRNO_BADREDIRECT;
798 addr->message = string_sprintf("error in %s %s: %s",
799 (filtertype != FILTER_FORWARD)? "filter" : "redirect",
800 (ob->data == NULL)? "file" : "data",
807 /* Yield is either FF_DELIVERED (significant action) or FF_NOTDELIVERED (no
808 significant action). Before dealing with these, however, we must handle the
809 effect of skip_syntax_errors.
811 If skip_syntax_errors was set and there were syntax errors in an address list,
812 error messages will be present in eblock. Log them and send a message if so
813 configured. We cannot do this earlier, because the error message must not be
814 sent as the local user. If there were no valid addresses, generated will be
815 NULL. In this case, the router declines.
817 For a filter file, the error message has been fudged into an eblock. After
818 dealing with it, the router declines. */
822 if (!moan_skipped_syntax_errors(
823 rblock->name, /* For message content */
825 (verify != v_none || address_test_mode)?
826 NULL : ob->syntax_errors_to, /* Who to mail */
827 generated != NULL, /* True if not all failed */
828 ob->syntax_errors_text)) /* Custom message */
831 if (filtertype != FILTER_FORWARD || generated == NULL)
833 addr->message = US"syntax error in redirection data";
838 /* Sort out the errors address and any header modifications, and handle the
839 generated addresses, if any. If there are no generated addresses, we must avoid
840 calling sort_errors_and_headers() in case this router declines - that function
841 may modify the errors_address field in the current address, and we don't want
842 to do that for a decline. */
844 if (generated != NULL)
846 if ((xrc = sort_errors_and_headers(rblock, addr, verify, &addr_prop)) != OK)
848 add_generated(rblock, addr_new, addr, generated, &addr_prop, &ugid, pw);
851 /* FF_DELIVERED with no generated addresses is what we get when an address list
852 contains :blackhole: or a filter contains "seen finish" without having
853 generated anything. Log what happened to this address, and return DISCARD. */
855 if (frc == FF_DELIVERED)
857 if (generated == NULL && verify == v_none && !address_test_mode)
859 log_write(0, LOG_MAIN, "=> %s <%s> R=%s", discarded, addr->address,
865 /* For an address list, FF_NOTDELIVERED always means that no addresses were
866 generated. For a filter, addresses may or may not have been generated. If none
867 were, it's the same as an empty address list, and the router declines. However,
868 if addresses were generated, we can't just decline because successful delivery
869 of the base address gets it marked "done", so deferred generated addresses
870 never get tried again. We have to generate a new version of the base address,
871 as if there were a "deliver" command in the filter file, with the original
872 address as parent. */
878 if (generated == NULL) return DECLINE;
880 next = deliver_make_addr(addr->address, FALSE);
883 next->next = *addr_new;
886 /* Copy relevant flags (af_propagate is a name for the set), and set the
887 data that propagates. */
889 copyflag(next, addr, af_propagate);
892 DEBUG(D_route) debug_printf("%s router autogenerated %s\n%s%s%s",
895 (addr_prop.errors_address != NULL)? " errors to " : "",
896 (addr_prop.errors_address != NULL)? addr_prop.errors_address : US"",
897 (addr_prop.errors_address != NULL)? "\n" : "");
900 /* Control gets here only when the address has been completely handled. Put the
901 original address onto the succeed queue so that any retry items that get
902 attached to it get processed. */
904 addr->next = *addr_succeed;
905 *addr_succeed = addr;
910 /* End of routers/redirect.c */