1 /* $Cambridge: exim/src/src/routers/redirect.c,v 1.14 2005/09/12 15:09:55 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_dlfunc", opt_bit | (RDON_DLFUNC << 16),
49 (void *)offsetof(redirect_router_options_block, bit_options) },
50 { "forbid_filter_existstest", opt_bit | (RDON_EXISTS << 16),
51 (void *)offsetof(redirect_router_options_block, bit_options) },
52 { "forbid_filter_logwrite",opt_bit | (RDON_LOG << 16),
53 (void *)offsetof(redirect_router_options_block, bit_options) },
54 { "forbid_filter_lookup", opt_bit | (RDON_LOOKUP << 16),
55 (void *)offsetof(redirect_router_options_block, bit_options) },
56 { "forbid_filter_perl", opt_bit | (RDON_PERL << 16),
57 (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_subaddress", opt_stringptr,
101 (void *)offsetof(redirect_router_options_block, sieve_subaddress) },
102 { "sieve_useraddress", opt_stringptr,
103 (void *)offsetof(redirect_router_options_block, sieve_useraddress) },
104 { "sieve_vacation_directory", opt_stringptr,
105 (void *)offsetof(redirect_router_options_block, sieve_vacation_directory) },
106 { "skip_syntax_errors", opt_bool,
107 (void *)offsetof(redirect_router_options_block, skip_syntax_errors) },
108 #ifdef EXPERIMENTAL_SRS
109 { "srs", opt_stringptr,
110 (void *)offsetof(redirect_router_options_block, srs) },
111 { "srs_alias", opt_stringptr,
112 (void *)offsetof(redirect_router_options_block, srs_alias) },
113 { "srs_condition", opt_stringptr,
114 (void *)offsetof(redirect_router_options_block, srs_condition) },
115 { "srs_dbinsert", opt_stringptr,
116 (void *)offsetof(redirect_router_options_block, srs_dbinsert) },
117 { "srs_dbselect", opt_stringptr,
118 (void *)offsetof(redirect_router_options_block, srs_dbselect) },
120 { "syntax_errors_text", opt_stringptr,
121 (void *)offsetof(redirect_router_options_block, syntax_errors_text) },
122 { "syntax_errors_to", opt_stringptr,
123 (void *)offsetof(redirect_router_options_block, syntax_errors_to) }
126 /* Size of the options list. An extern variable has to be used so that its
127 address can appear in the tables drtables.c. */
129 int redirect_router_options_count =
130 sizeof(redirect_router_options)/sizeof(optionlist);
132 /* Default private options block for the redirect router. */
134 redirect_router_options_block redirect_router_option_defaults = {
135 NULL, /* directory_transport */
136 NULL, /* file_transport */
137 NULL, /* pipe_transport */
138 NULL, /* reply_transport */
140 NULL, /* directory_transport_name */
143 NULL, /* file_transport_name */
144 NULL, /* include_directory */
145 NULL, /* pipe_transport_name */
146 NULL, /* reply_transport_name */
147 NULL, /* sieve_subaddress */
148 NULL, /* sieve_useraddress */
149 NULL, /* sieve_vacation_directory */
150 NULL, /* syntax_errors_text */
151 NULL, /* syntax_errors_to */
152 NULL, /* qualify_domain */
154 NULL, /* owngroups */
155 #ifdef EXPERIMENTAL_SRS
157 NULL, /* srs_alias */
158 NULL, /* srs_condition */
159 NULL, /* srs_dbinsert */
160 NULL, /* srs_dbselect */
163 RDO_REWRITE, /* bit_options */
164 FALSE, /* check_ancestor */
165 TRUE_UNSET, /* check_owner */
166 TRUE_UNSET, /* check_group */
167 FALSE, /* forbid_file */
168 FALSE, /* forbid_filter_reply */
169 FALSE, /* forbid_pipe */
170 FALSE, /* hide_child_in_errmsg */
171 FALSE, /* one_time */
172 FALSE, /* qualify_preserve_domain */
173 FALSE /* skip_syntax_errors */
178 /*************************************************
179 * Initialization entry point *
180 *************************************************/
182 /* Called for each instance, after its options have been read, to enable
183 consistency checks to be done, or anything else that needs to be set up. */
185 void redirect_router_init(router_instance *rblock)
187 redirect_router_options_block *ob =
188 (redirect_router_options_block *)(rblock->options_block);
190 /* Either file or data must be set, but not both */
192 if ((ob->file == NULL) == (ob->data == NULL))
193 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s router:\n "
194 "%sone of \"file\" or \"data\" must be specified",
195 rblock->name, (ob->file == NULL)? "" : "only ");
197 /* Onetime aliases can only be real addresses. Headers can't be manipulated.
198 The combination of one_time and unseen is not allowed. We can't check the
199 expansion of "unseen" here, but we assume that if it is set to anything other
200 than false, there is likely to be a problem. */
204 ob->forbid_pipe = ob->forbid_file = ob->forbid_filter_reply = TRUE;
205 if (rblock->extra_headers != NULL || rblock->remove_headers != NULL)
206 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s router:\n "
207 "\"headers_add\" and \"headers_remove\" are not permitted with "
208 "\"one_time\"", rblock->name);
209 if (rblock->unseen || rblock->expand_unseen != NULL)
210 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s router:\n "
211 "\"unseen\" may not be used with \"one_time\"", rblock->name);
214 /* The defaults for check_owner and check_group depend on other settings. The
215 defaults are: Check the owner if check_local_user or owners is set; check the
216 group if check_local_user is set without a restriction on the group write bit,
217 or if owngroups is set. */
219 if (ob->check_owner == TRUE_UNSET)
220 ob->check_owner = rblock->check_local_user ||
221 (ob->owners != NULL && ob->owners[0] != 0);
223 if (ob->check_group == TRUE_UNSET)
224 ob->check_group = (rblock->check_local_user && (ob->modemask & 020) == 0) ||
225 (ob->owngroups != NULL && ob->owngroups[0] != 0);
227 /* If explicit qualify domain set, the preserve option is locked out */
229 if (ob->qualify_domain != NULL && ob->qualify_preserve_domain)
230 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s router:\n "
231 "only one of \"qualify_domain\" or \"qualify_preserve_domain\" must be set",
234 /* If allow_filter is set, either user or check_local_user must be set. */
236 if (!rblock->check_local_user &&
238 rblock->expand_uid == NULL &&
239 (ob->bit_options & RDO_FILTER) != 0)
240 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s router:\n "
241 "\"user\" or \"check_local_user\" must be set with \"allow_filter\"",
247 /*************************************************
248 * Get errors address and header mods *
249 *************************************************/
251 /* This function is called when new addresses are generated, in order to
252 sort out errors address and header modifications. We put the errors address
253 into the parent address (even though it is never used from there because that
254 address is never transported) so that it can be retrieved if any of the
255 children gets routed by an "unseen" router. The clone of the child that is
256 passed on must have the original errors_address value.
259 rblock the router control block
260 addr the address being routed
261 verify v_none/v_recipient/v_sender/v_expn
262 addr_prop point to the propagated block, which is where the
263 new values are to be placed
265 Returns: the result of rf_get_errors_address() or rf_get_munge_headers(),
266 which is either OK or DEFER
270 sort_errors_and_headers(router_instance *rblock, address_item *addr,
271 int verify, address_item_propagated *addr_prop)
273 int frc = rf_get_errors_address(addr, rblock, verify,
274 &(addr_prop->errors_address));
275 if (frc != OK) return frc;
276 addr->p.errors_address = addr_prop->errors_address;
277 return rf_get_munge_headers(addr, rblock, &(addr_prop->extra_headers),
278 &(addr_prop->remove_headers));
283 /*************************************************
284 * Process a set of generated new addresses *
285 *************************************************/
287 /* This function sets up a set of newly generated child addresses and puts them
288 on the new address chain. Copy in the uid, gid and permission flags for use by
289 pipes and files, set the parent, and "or" its af_ignore_error flag. Also record
290 the setting for any starting router.
292 If the generated address is the same as one of its ancestors, and the
293 check_ancestor flag is set, do not use this generated address, but replace it
294 with a copy of the input address. This is to cope with cases where A is aliased
295 to B and B has a .forward file pointing to A, though it is usually set on the
296 forwardfile rather than the aliasfile. We can't just pass on the old
297 address by returning FAIL, because it must act as a general parent for
298 generated addresses, and only get marked "done" when all its children are
303 addr_new new address chain
304 addr original address
305 generated list of generated addresses
306 addr_prop the propagated block, containing the errors_address,
307 header modification stuff, and address_data
308 ugidptr points to uid/gid data for files, pipes, autoreplies
309 pw password entry, set if ob->check_local_user is TRUE
315 add_generated(router_instance *rblock, address_item **addr_new,
316 address_item *addr, address_item *generated,
317 address_item_propagated *addr_prop, ugid_block *ugidptr, struct passwd *pw)
319 redirect_router_options_block *ob =
320 (redirect_router_options_block *)(rblock->options_block);
322 while (generated != NULL)
324 address_item *parent;
325 address_item *next = generated;
326 uschar *errors_address = next->p.errors_address;
328 generated = next->next;
330 orflag(next, addr, af_ignore_error);
331 next->start_router = rblock->redirect_router;
334 next->next = *addr_new;
337 /* Don't do the "one_time" thing for the first pass of a 2-stage queue run. */
339 if (ob->one_time && !queue_2stage)
341 for (parent = addr; parent->parent != NULL; parent = parent->parent);
342 next->onetime_parent = parent->address;
345 if (ob->hide_child_in_errmsg) setflag(next, af_hide_child);
347 /* If check_ancestor is set, we want to know if any ancestor of this address
348 is the address we are about to generate. The check must be done caselessly
349 unless the ancestor was routed by a case-sensitive router. */
351 if (ob->check_ancestor)
353 for (parent = addr; parent != NULL; parent = parent->parent)
355 if (((parent->router != NULL && parent->router->caseful_local_part)?
356 Ustrcmp(next->address, parent->address)
358 strcmpic(next->address, parent->address)
361 DEBUG(D_route) debug_printf("generated parent replaced by child\n");
362 next->address = string_copy(addr->address);
368 /* A user filter may, under some circumstances, set up an errors address.
369 If so, we must take care to re-instate it when we copy in the propagated
370 data so that it overrides any errors_to setting on the router. */
372 next->p = *addr_prop;
373 if (errors_address != NULL) next->p.errors_address = errors_address;
375 /* For pipes, files, and autoreplies, record this router as handling them,
376 because they don't go through the routing process again. Then set up uid,
377 gid, home and current directories for transporting. */
379 if (testflag(next, af_pfr))
381 next->router = rblock;
382 rf_set_ugid(next, ugidptr); /* Will contain pw values if not overridden */
384 /* When getting the home directory out of the password information, wrap it
385 in \N...\N to avoid expansion later. In Cygwin, home directories can
386 contain $ characters. */
388 if (rblock->home_directory != NULL)
389 next->home_dir = rblock->home_directory;
390 else if (rblock->check_local_user)
391 next->home_dir = string_sprintf("\\N%s\\N", pw->pw_dir);
392 else if (rblock->router_home_directory != NULL &&
393 testflag(addr, af_home_expanded))
395 next->home_dir = deliver_home;
396 setflag(next, af_home_expanded);
399 next->current_dir = rblock->current_directory;
401 /* Permission options */
403 if (!ob->forbid_pipe) setflag(next, af_allow_pipe);
404 if (!ob->forbid_file) setflag(next, af_allow_file);
405 if (!ob->forbid_filter_reply) setflag(next, af_allow_reply);
407 /* If the transport setting fails, the error gets picked up at the outer
408 level from the setting of basic_errno in the address. */
410 if (next->address[0] == '|')
412 address_pipe = next->address;
413 if (rf_get_transport(ob->pipe_transport_name, &(ob->pipe_transport),
414 next, rblock->name, US"pipe_transport"))
415 next->transport = ob->pipe_transport;
418 else if (next->address[0] == '>')
420 if (rf_get_transport(ob->reply_transport_name, &(ob->reply_transport),
421 next, rblock->name, US"reply_transport"))
422 next->transport = ob->reply_transport;
424 else /* must be file or directory */
426 int len = Ustrlen(next->address);
427 address_file = next->address;
428 if (next->address[len-1] == '/')
430 if (rf_get_transport(ob->directory_transport_name,
431 &(ob->directory_transport), next, rblock->name,
432 US"directory_transport"))
433 next->transport = ob->directory_transport;
437 if (rf_get_transport(ob->file_transport_name, &(ob->file_transport),
438 next, rblock->name, US"file_transport"))
439 next->transport = ob->file_transport;
447 debug_printf("%s router generated %s\n %serrors_to=%s transport=%s\n",
450 testflag(next, af_pfr)? "pipe, file, or autoreply\n " : "",
451 next->p.errors_address,
452 (next->transport == NULL)? US"NULL" : next->transport->name);
454 if (testflag(next, af_uid_set))
455 debug_printf(" uid=%ld ", (long int)(next->uid));
457 debug_printf(" uid=unset ");
459 if (testflag(next, af_gid_set))
460 debug_printf("gid=%ld ", (long int)(next->gid));
462 debug_printf("gid=unset ");
464 debug_printf("home=%s\n", next->home_dir);
470 /*************************************************
472 *************************************************/
474 /* See local README for interface description. This router returns:
477 . empty address list, or filter did nothing significant
480 . verifying the errors address caused a deferment or a big disaster such
481 as an expansion failure (rf_get_errors_address)
482 . expanding a headers_{add,remove} string caused a deferment or another
483 expansion error (rf_get_munge_headers)
484 . :defer: or "freeze" in a filter
485 . error in address list or filter
486 . skipped syntax errors, but failed to send the message
489 . address was :blackhole:d or "seen finish"ed
495 . new addresses added to addr_new
498 int redirect_router_entry(
499 router_instance *rblock, /* data for this instantiation */
500 address_item *addr, /* address we are working on */
501 struct passwd *pw, /* passwd entry after check_local_user */
502 int verify, /* v_none/v_recipient/v_sender/v_expn */
503 address_item **addr_local, /* add it to this if it's local */
504 address_item **addr_remote, /* add it to this if it's remote */
505 address_item **addr_new, /* put new addresses on here */
506 address_item **addr_succeed) /* put old address here on success */
508 redirect_router_options_block *ob =
509 (redirect_router_options_block *)(rblock->options_block);
510 address_item *generated = NULL;
511 uschar *save_qualify_domain_recipient = qualify_domain_recipient;
512 uschar *discarded = US"discarded";
513 address_item_propagated addr_prop;
514 error_block *eblock = NULL;
516 redirect_block redirect;
517 int filtertype = FILTER_UNSET;
519 int options = ob->bit_options;
523 addr_local = addr_local; /* Keep picky compilers happy */
524 addr_remote = addr_remote;
526 /* Initialize the data to be propagated to the children */
528 addr_prop.address_data = deliver_address_data;
529 addr_prop.domain_data = deliver_domain_data;
530 addr_prop.localpart_data = deliver_localpart_data;
531 addr_prop.errors_address = NULL;
532 addr_prop.extra_headers = NULL;
533 addr_prop.remove_headers = NULL;
535 #ifdef EXPERIMENTAL_SRS
536 addr_prop.srs_sender = NULL;
539 /* When verifying and testing addresses, the "logwrite" command in filters
542 if (verify == v_none && !address_test_mode) options |= RDO_REALLOG;
544 /* Sort out the fixed or dynamic uid/gid. This uid is used (a) for reading the
545 file (and interpreting a filter) and (b) for running the transports for
546 generated file and pipe addresses. It is not (necessarily) the same as the uids
547 that may own the file. Exim panics if an expanded string is not a number and
548 can't be found in the password file. Other errors set the freezing bit. */
550 if (!rf_get_ugid(rblock, addr, &ugid)) return DEFER;
552 if (!ugid.uid_set && pw != NULL)
554 ugid.uid = pw->pw_uid;
558 if (!ugid.gid_set && pw != NULL)
560 ugid.gid = pw->pw_gid;
564 #ifdef EXPERIMENTAL_SRS
565 /* Perform SRS on recipient/return-path as required */
571 if(ob->srs_condition != NULL)
572 usesrs = expand_check_condition(ob->srs_condition, "srs_condition expansion failed", NULL);
576 int srs_action = 0, n_srs;
580 /* What are we doing? */
581 if(Ustrcmp(ob->srs, "forward") == 0)
583 else if(Ustrcmp(ob->srs, "reverseandforward") == 0)
587 if((ob->srs_dbinsert == NULL) ^ (ob->srs_dbselect == NULL))
590 else if(Ustrcmp(ob->srs, "reverse") == 0)
596 srs_orig_recipient = addr->address;
600 eximsrs_db_set(TRUE, ob->srs_dbselect);
601 /* Comment this out for now...
603 // eximsrs_db_set(TRUE, NULL);
606 if((n_srs = eximsrs_reverse(&res, addr->address)) == OK)
610 debug_printf("SRS (reverse): Recipient '%s' rewritten to '%s'\n", srs_orig_recipient, srs_recipient);
620 /* No point in actually performing SRS if we are just verifying a recipient */
621 if((srs_action & 1) && verify == v_none &&
622 (sender_address ? sender_address[0] != 0 : FALSE))
625 srs_orig_sender = sender_address;
628 eximsrs_db_set(FALSE, ob->srs_dbinsert);
629 /* Comment this out for now...
631 // eximsrs_db_set(FALSE, NULL);
634 if(ob->srs_alias != NULL ? (usedomain = expand_string(ob->srs_alias)) == NULL : 1)
635 usedomain = deliver_domain;
637 if((n_srs = eximsrs_forward(&res, sender_address, usedomain)) == OK)
639 addr_prop.srs_sender = res;
641 debug_printf("SRS (forward): Sender '%s' rewritten to '%s'\n", srs_orig_sender, res);
653 /* Call the function that interprets redirection data, either inline or from a
654 file. This is a separate function so that the system filter can use it. It will
655 run the function in a subprocess if necessary. If qualify_preserve_domain is
656 set, temporarily reset qualify_domain_recipient to the current domain so that
657 any unqualified addresses get qualified with the same domain as the incoming
658 address. Otherwise, if a local qualify_domain is provided, set that up. */
660 if (ob->qualify_preserve_domain)
661 qualify_domain_recipient = addr->domain;
662 else if (ob->qualify_domain != NULL)
664 uschar *new_qdr = rf_expand_data(addr, ob->qualify_domain, &xrc);
665 if (new_qdr == NULL) return xrc;
666 qualify_domain_recipient = new_qdr;
669 redirect.owners = ob->owners;
670 redirect.owngroups = ob->owngroups;
671 redirect.modemask = ob->modemask;
672 redirect.check_owner = ob->check_owner;
673 redirect.check_group = ob->check_group;
676 if (ob->file != NULL)
678 redirect.string = ob->file;
679 redirect.isfile = TRUE;
683 redirect.string = ob->data;
684 redirect.isfile = FALSE;
687 frc = rda_interpret(&redirect, options, ob->include_directory,
688 ob->sieve_vacation_directory, ob->sieve_useraddress, ob->sieve_subaddress,
689 &ugid, &generated, &(addr->message), ob->skip_syntax_errors? &eblock : NULL,
690 &filtertype, string_sprintf("%s router (recipient is %s)", rblock->name,
693 qualify_domain_recipient = save_qualify_domain_recipient;
695 /* Handle exceptional returns from filtering or processing an address list.
696 For FAIL and FREEZE we honour any previously set up deliveries by a filter. */
701 addr->message = addr->user_message = NULL;
705 DEBUG(D_route) debug_printf("address :blackhole:d\n");
707 discarded = US":blackhole:";
711 /* FF_DEFER and FF_FAIL can arise only as a result of explicit commands
712 (:fail: in an alias file or "fail" in a filter). If a configured message was
713 supplied, allow it to be included in an SMTP response after verifying. */
716 if (addr->message == NULL) addr->message = US"forced defer";
717 else addr->user_message = addr->message;
721 if ((xrc = sort_errors_and_headers(rblock, addr, verify, &addr_prop)) != OK)
723 add_generated(rblock, addr_new, addr, generated, &addr_prop, &ugid, pw);
724 if (addr->message == NULL)
725 addr->message = US"forced rejection";
728 addr->user_message = addr->message;
729 setflag(addr, af_pass_message);
733 /* As in the case of a system filter, a freeze does not happen after a manual
734 thaw. In case deliveries were set up by the filter, we set the child count
735 high so that their completion does not mark the original address done. */
738 if (!deliver_manual_thaw)
740 if ((xrc = sort_errors_and_headers(rblock, addr, verify, &addr_prop))
742 add_generated(rblock, addr_new, addr, generated, &addr_prop, &ugid, pw);
743 if (addr->message == NULL) addr->message = US"frozen by filter";
744 addr->special_action = SPECIAL_FREEZE;
745 addr->child_count = 9999;
748 frc = FF_NOTDELIVERED;
751 /* Handle syntax errors and :include: failures and lookup defers */
756 /* If filtertype is still FILTER_UNSET, it means that the redirection data
757 was never inspected, so the error was an expansion failure or failure to open
758 the file, or whatever. In these cases, the existing error message is probably
761 if (filtertype == FILTER_UNSET) return DEFER;
763 /* If it was a filter and skip_syntax_errors is set, we want to set up
764 the error message so that it can be logged and mailed to somebody. */
766 if (filtertype != FILTER_FORWARD && ob->skip_syntax_errors)
768 eblock = store_get(sizeof(error_block));
770 eblock->text1 = addr->message;
771 eblock->text2 = NULL;
772 addr->message = addr->user_message = NULL;
775 /* Otherwise set up the error for the address and defer. */
779 addr->basic_errno = ERRNO_BADREDIRECT;
780 addr->message = string_sprintf("error in %s %s: %s",
781 (filtertype != FILTER_FORWARD)? "filter" : "redirect",
782 (ob->data == NULL)? "file" : "data",
789 /* Yield is either FF_DELIVERED (significant action) or FF_NOTDELIVERED (no
790 significant action). Before dealing with these, however, we must handle the
791 effect of skip_syntax_errors.
793 If skip_syntax_errors was set and there were syntax errors in an address list,
794 error messages will be present in eblock. Log them and send a message if so
795 configured. We cannot do this earlier, because the error message must not be
796 sent as the local user. If there were no valid addresses, generated will be
797 NULL. In this case, the router declines.
799 For a filter file, the error message has been fudged into an eblock. After
800 dealing with it, the router declines. */
804 if (!moan_skipped_syntax_errors(
805 rblock->name, /* For message content */
807 (verify != v_none || address_test_mode)?
808 NULL : ob->syntax_errors_to, /* Who to mail */
809 generated != NULL, /* True if not all failed */
810 ob->syntax_errors_text)) /* Custom message */
813 if (filtertype != FILTER_FORWARD || generated == NULL)
815 addr->message = US"syntax error in redirection data";
820 /* Sort out the errors address and any header modifications, and handle the
821 generated addresses, if any. If there are no generated addresses, we must avoid
822 calling sort_errors_and_headers() in case this router declines - that function
823 may modify the errors_address field in the current address, and we don't want
824 to do that for a decline. */
826 if (generated != NULL)
828 if ((xrc = sort_errors_and_headers(rblock, addr, verify, &addr_prop)) != OK)
830 add_generated(rblock, addr_new, addr, generated, &addr_prop, &ugid, pw);
833 /* FF_DELIVERED with no generated addresses is what we get when an address list
834 contains :blackhole: or a filter contains "seen finish" without having
835 generated anything. Log what happened to this address, and return DISCARD. */
837 if (frc == FF_DELIVERED)
839 if (generated == NULL && verify == v_none && !address_test_mode)
841 log_write(0, LOG_MAIN, "=> %s <%s> R=%s", discarded, addr->address,
847 /* For an address list, FF_NOTDELIVERED always means that no addresses were
848 generated. For a filter, addresses may or may not have been generated. If none
849 were, it's the same as an empty address list, and the router declines. However,
850 if addresses were generated, we can't just decline because successful delivery
851 of the base address gets it marked "done", so deferred generated addresses
852 never get tried again. We have to generate a new version of the base address,
853 as if there were a "deliver" command in the filter file, with the original
854 address as parent. */
860 if (generated == NULL) return DECLINE;
862 next = deliver_make_addr(addr->address, FALSE);
865 next->next = *addr_new;
868 /* Copy relevant flags (af_propagate is a name for the set), and set the
869 data that propagates. */
871 copyflag(next, addr, af_propagate);
874 DEBUG(D_route) debug_printf("%s router autogenerated %s\n%s%s%s",
877 (addr_prop.errors_address != NULL)? " errors to " : "",
878 (addr_prop.errors_address != NULL)? addr_prop.errors_address : US"",
879 (addr_prop.errors_address != NULL)? "\n" : "");
882 /* Control gets here only when the address has been completely handled. Put the
883 original address onto the succeed queue so that any retry items that get
884 attached to it get processed. */
886 addr->next = *addr_succeed;
887 *addr_succeed = addr;
892 /* End of routers/redirect.c */