Commit | Line | Data |
---|---|---|
8e669ac1 | 1 | /* $Cambridge: exim/src/src/routers/redirect.c,v 1.5 2005/02/17 11:58:27 ph10 Exp $ */ |
0756eb3c PH |
2 | |
3 | /************************************************* | |
4 | * Exim - an Internet mail transport agent * | |
5 | *************************************************/ | |
6 | ||
c988f1f4 | 7 | /* Copyright (c) University of Cambridge 1995 - 2005 */ |
0756eb3c PH |
8 | /* See the file NOTICE for conditions of use and distribution. */ |
9 | ||
10 | ||
11 | #include "../exim.h" | |
12 | #include "rf_functions.h" | |
13 | #include "redirect.h" | |
14 | ||
15 | ||
16 | ||
17 | /* Options specific to the redirect router. */ | |
18 | ||
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) }, | |
23c7ff99 PH |
44 | { "forbid_exim_filter", opt_bit | (RDON_EXIM_FILTER << 16), |
45 | (void *)offsetof(redirect_router_options_block, bit_options) }, | |
0756eb3c PH |
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) }, | |
54 | #ifdef EXIM_PERL | |
55 | { "forbid_filter_perl", opt_bit | (RDON_PERL << 16), | |
56 | (void *)offsetof(redirect_router_options_block, bit_options) }, | |
57 | #endif | |
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) }, | |
23c7ff99 PH |
70 | { "forbid_sieve_filter",opt_bit | (RDON_SIEVE_FILTER << 16), |
71 | (void *)offsetof(redirect_router_options_block, bit_options) }, | |
0756eb3c PH |
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) }, | |
8523533c TK |
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) }, | |
113 | #endif | |
0756eb3c PH |
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) } | |
118 | }; | |
119 | ||
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. */ | |
122 | ||
123 | int redirect_router_options_count = | |
124 | sizeof(redirect_router_options)/sizeof(optionlist); | |
125 | ||
126 | /* Default private options block for the redirect router. */ | |
127 | ||
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 */ | |
133 | NULL, /* data */ | |
134 | NULL, /* directory_transport_name */ | |
135 | NULL, /* file */ | |
136 | NULL, /* file_dir */ | |
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 */ | |
145 | NULL, /* owners */ | |
146 | NULL, /* owngroups */ | |
8523533c TK |
147 | #ifdef EXPERIMENTAL_SRS |
148 | NULL, /* srs */ | |
149 | NULL, /* srs_condition */ | |
150 | NULL, /* srs_db */ | |
151 | NULL, /* srs_alias */ | |
152 | #endif | |
0756eb3c PH |
153 | 022, /* modemask */ |
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 */ | |
165 | }; | |
166 | ||
167 | ||
168 | ||
169 | /************************************************* | |
170 | * Initialization entry point * | |
171 | *************************************************/ | |
172 | ||
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. */ | |
175 | ||
176 | void redirect_router_init(router_instance *rblock) | |
177 | { | |
178 | redirect_router_options_block *ob = | |
179 | (redirect_router_options_block *)(rblock->options_block); | |
180 | ||
181 | /* Either file or data must be set, but not both */ | |
182 | ||
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 "); | |
187 | ||
188 | /* Onetime aliases can only be real addresses. Headers can't be manipulated. */ | |
189 | ||
190 | if (ob->one_time) | |
191 | { | |
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); | |
197 | } | |
198 | ||
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. */ | |
203 | ||
204 | if (ob->check_owner == TRUE_UNSET) | |
205 | ob->check_owner = rblock->check_local_user || | |
206 | (ob->owners != NULL && ob->owners[0] != 0); | |
207 | ||
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); | |
211 | ||
212 | /* If explicit qualify domain set, the preserve option is locked out */ | |
213 | ||
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", | |
217 | rblock->name); | |
218 | ||
219 | /* If allow_filter is set, either user or check_local_user must be set. */ | |
220 | ||
221 | if (!rblock->check_local_user && | |
222 | !rblock->uid_set && | |
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\"", | |
227 | rblock->name); | |
228 | } | |
229 | ||
230 | ||
231 | ||
232 | /************************************************* | |
233 | * Get errors address and header mods * | |
234 | *************************************************/ | |
235 | ||
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. | |
242 | ||
243 | Arguments: | |
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 | |
249 | ||
250 | Returns: the result of rf_get_errors_address() or rf_get_munge_headers(), | |
251 | which is either OK or DEFER | |
252 | */ | |
253 | ||
254 | static int | |
255 | sort_errors_and_headers(router_instance *rblock, address_item *addr, | |
256 | BOOL verify, address_item_propagated *addr_prop) | |
257 | { | |
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)); | |
264 | } | |
265 | ||
266 | ||
267 | ||
268 | /************************************************* | |
269 | * Process a set of generated new addresses * | |
270 | *************************************************/ | |
271 | ||
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. | |
276 | ||
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 | |
284 | delivered. | |
285 | ||
286 | Arguments: | |
287 | rblock router block | |
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 | |
295 | ||
296 | Returns: nothing | |
297 | */ | |
298 | ||
299 | static void | |
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) | |
303 | { | |
304 | redirect_router_options_block *ob = | |
305 | (redirect_router_options_block *)(rblock->options_block); | |
306 | ||
307 | while (generated != NULL) | |
308 | { | |
309 | address_item *parent; | |
310 | address_item *next = generated; | |
311 | uschar *errors_address = next->p.errors_address; | |
312 | ||
313 | generated = next->next; | |
314 | next->parent = addr; | |
315 | orflag(next, addr, af_ignore_error); | |
316 | next->start_router = rblock->redirect_router; | |
317 | addr->child_count++; | |
318 | ||
319 | next->next = *addr_new; | |
320 | *addr_new = next; | |
321 | ||
322 | /* Don't do the "one_time" thing for the first pass of a 2-stage queue run. */ | |
323 | ||
324 | if (ob->one_time && !queue_2stage) | |
325 | { | |
326 | for (parent = addr; parent->parent != NULL; parent = parent->parent); | |
327 | next->onetime_parent = parent->address; | |
328 | } | |
329 | ||
330 | if (ob->hide_child_in_errmsg) setflag(next, af_hide_child); | |
331 | ||
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. */ | |
335 | ||
336 | if (ob->check_ancestor) | |
337 | { | |
338 | for (parent = addr; parent != NULL; parent = parent->parent) | |
339 | { | |
340 | if (((parent->router != NULL && parent->router->caseful_local_part)? | |
341 | Ustrcmp(next->address, parent->address) | |
342 | : | |
343 | strcmpic(next->address, parent->address) | |
344 | ) == 0) | |
345 | { | |
346 | DEBUG(D_route) debug_printf("generated parent replaced by child\n"); | |
347 | next->address = string_copy(addr->address); | |
348 | break; | |
349 | } | |
350 | } | |
351 | } | |
352 | ||
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. */ | |
356 | ||
357 | next->p = *addr_prop; | |
358 | if (errors_address != NULL) next->p.errors_address = errors_address; | |
359 | ||
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. */ | |
363 | ||
364 | if (testflag(next, af_pfr)) | |
365 | { | |
366 | next->router = rblock; | |
367 | rf_set_ugid(next, ugidptr); /* Will contain pw values if not overridden */ | |
368 | ||
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. */ | |
372 | ||
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)) | |
379 | { | |
380 | next->home_dir = deliver_home; | |
381 | setflag(next, af_home_expanded); | |
382 | } | |
383 | ||
384 | next->current_dir = rblock->current_directory; | |
385 | ||
386 | /* Permission options */ | |
387 | ||
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); | |
391 | ||
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. */ | |
394 | ||
395 | if (next->address[0] == '|') | |
396 | { | |
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; | |
401 | address_pipe = NULL; | |
402 | } | |
403 | else if (next->address[0] == '>') | |
404 | { | |
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; | |
408 | } | |
409 | else /* must be file or directory */ | |
410 | { | |
411 | int len = Ustrlen(next->address); | |
412 | address_file = next->address; | |
413 | if (next->address[len-1] == '/') | |
414 | { | |
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; | |
419 | } | |
420 | else | |
421 | { | |
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; | |
425 | } | |
426 | address_file = NULL; | |
427 | } | |
428 | } | |
429 | ||
430 | DEBUG(D_route) | |
431 | { | |
432 | debug_printf("%s router generated %s\n %serrors_to=%s transport=%s\n", | |
433 | rblock->name, | |
434 | next->address, | |
435 | testflag(next, af_pfr)? "pipe, file, or autoreply\n " : "", | |
436 | next->p.errors_address, | |
437 | (next->transport == NULL)? US"NULL" : next->transport->name); | |
438 | ||
439 | if (testflag(next, af_uid_set)) | |
440 | debug_printf(" uid=%ld ", (long int)(next->uid)); | |
441 | else | |
442 | debug_printf(" uid=unset "); | |
443 | ||
444 | if (testflag(next, af_gid_set)) | |
445 | debug_printf("gid=%ld ", (long int)(next->gid)); | |
446 | else | |
447 | debug_printf("gid=unset "); | |
448 | ||
449 | debug_printf("home=%s\n", next->home_dir); | |
450 | } | |
451 | } | |
452 | } | |
453 | ||
454 | ||
455 | /************************************************* | |
456 | * Main entry point * | |
457 | *************************************************/ | |
458 | ||
459 | /* See local README for interface description. This router returns: | |
460 | ||
461 | DECLINE | |
462 | . empty address list, or filter did nothing significant | |
463 | ||
464 | DEFER | |
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 | |
472 | ||
473 | DISCARD | |
474 | . address was :blackhole:d or "seen finish"ed | |
475 | ||
476 | FAIL | |
477 | . :fail: | |
478 | ||
479 | OK | |
480 | . new addresses added to addr_new | |
481 | */ | |
482 | ||
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 */ | |
492 | { | |
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; | |
500 | ugid_block ugid; | |
501 | redirect_block redirect; | |
502 | int filtertype = FILTER_UNSET; | |
503 | int yield = OK; | |
504 | int options = ob->bit_options; | |
505 | int frc = 0; | |
506 | int xrc = 0; | |
507 | ||
508 | addr_local = addr_local; /* Keep picky compilers happy */ | |
509 | addr_remote = addr_remote; | |
510 | ||
511 | /* Initialize the data to be propagated to the children */ | |
512 | ||
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; | |
519 | ||
520 | /* When verifying and testing addresses, the "logwrite" command in filters | |
521 | must be bypassed. */ | |
522 | ||
523 | if (!verify && !address_test_mode) options |= RDO_REALLOG; | |
524 | ||
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. */ | |
530 | ||
531 | if (!rf_get_ugid(rblock, addr, &ugid)) return DEFER; | |
532 | ||
533 | if (!ugid.uid_set && pw != NULL) | |
534 | { | |
535 | ugid.uid = pw->pw_uid; | |
536 | ugid.uid_set = TRUE; | |
537 | } | |
538 | ||
539 | if (!ugid.gid_set && pw != NULL) | |
540 | { | |
541 | ugid.gid = pw->pw_gid; | |
542 | ugid.gid_set = TRUE; | |
543 | } | |
544 | ||
8523533c TK |
545 | #ifdef EXPERIMENTAL_SRS |
546 | /* For reverse SRS, fill the srs_recipient expandsion variable, | |
547 | on failure, return decline/fail as relevant */ | |
548 | if(ob->srs != NULL) | |
549 | { | |
550 | BOOL usesrs = TRUE; | |
8e669ac1 | 551 | |
8523533c TK |
552 | if(ob->srs_condition != NULL) |
553 | usesrs = expand_check_condition(ob->srs_condition, "srs_condition expansion failed", NULL); | |
8e669ac1 | 554 | |
8523533c TK |
555 | if(usesrs) |
556 | if(Ustrcmp(ob->srs, "reverse") == 0 || Ustrcmp(ob->srs, "reverseandforward") == 0) | |
557 | { | |
558 | uschar *res; | |
559 | int n_srs; | |
8e669ac1 | 560 | |
8523533c TK |
561 | srs_orig_recipient = addr->address; |
562 | eximsrs_init(); | |
563 | if(ob->srs_db) | |
564 | eximsrs_db_set(TRUE, ob->srs_db); | |
565 | if((n_srs = eximsrs_reverse(&res, addr->address)) != OK) | |
566 | return n_srs; | |
567 | srs_recipient = res; | |
568 | eximsrs_done(); | |
569 | DEBUG(D_any) | |
c988f1f4 | 570 | debug_printf("SRS: Recipient '%s' rewritten to '%s'\n", srs_orig_recipient, srs_recipient); |
8523533c TK |
571 | } |
572 | } | |
573 | #endif | |
574 | ||
0756eb3c PH |
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. */ | |
581 | ||
582 | if (ob->qualify_preserve_domain) | |
583 | qualify_domain_recipient = addr->domain; | |
584 | else if (ob->qualify_domain != NULL) | |
585 | { | |
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; | |
589 | } | |
590 | ||
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; | |
596 | redirect.pw = pw; | |
597 | ||
598 | if (ob->file != NULL) | |
599 | { | |
600 | redirect.string = ob->file; | |
601 | redirect.isfile = TRUE; | |
602 | } | |
603 | else | |
604 | { | |
605 | redirect.string = ob->data; | |
606 | redirect.isfile = FALSE; | |
607 | } | |
608 | ||
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)); | |
613 | ||
614 | qualify_domain_recipient = save_qualify_domain_recipient; | |
615 | ||
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. */ | |
618 | ||
619 | switch (frc) | |
620 | { | |
621 | case FF_NONEXIST: | |
622 | addr->message = addr->user_message = NULL; | |
623 | return DECLINE; | |
624 | ||
625 | case FF_BLACKHOLE: | |
626 | DEBUG(D_route) debug_printf("address :blackhole:d\n"); | |
627 | generated = NULL; | |
628 | discarded = US":blackhole:"; | |
629 | frc = FF_DELIVERED; | |
630 | break; | |
631 | ||
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. */ | |
635 | ||
636 | case FF_DEFER: | |
637 | if (addr->message == NULL) addr->message = US"forced defer"; | |
638 | else addr->user_message = addr->message; | |
639 | return DEFER; | |
640 | ||
641 | case FF_FAIL: | |
642 | if ((xrc = sort_errors_and_headers(rblock, addr, verify, &addr_prop)) != OK) | |
643 | return xrc; | |
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; | |
647 | return FAIL; | |
648 | ||
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. */ | |
652 | ||
653 | case FF_FREEZE: | |
654 | if (!deliver_manual_thaw) | |
655 | { | |
656 | if ((xrc = sort_errors_and_headers(rblock, addr, verify, &addr_prop)) | |
657 | != OK) return xrc; | |
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; | |
662 | return DEFER; | |
663 | } | |
664 | frc = FF_NOTDELIVERED; | |
665 | break; | |
666 | ||
667 | /* Handle syntax errors and :include: failures and lookup defers */ | |
668 | ||
669 | case FF_ERROR: | |
670 | case FF_INCLUDEFAIL: | |
671 | ||
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 | |
675 | sufficient. */ | |
676 | ||
677 | if (filtertype == FILTER_UNSET) return DEFER; | |
678 | ||
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. */ | |
681 | ||
682 | if (filtertype != FILTER_FORWARD && ob->skip_syntax_errors) | |
683 | { | |
684 | eblock = store_get(sizeof(error_block)); | |
685 | eblock->next = NULL; | |
686 | eblock->text1 = addr->message; | |
687 | eblock->text2 = NULL; | |
688 | addr->message = addr->user_message = NULL; | |
689 | } | |
690 | ||
691 | /* Otherwise set up the error for the address and defer. */ | |
692 | ||
693 | else | |
694 | { | |
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", | |
699 | addr->message); | |
700 | return DEFER; | |
701 | } | |
702 | } | |
703 | ||
704 | ||
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. | |
708 | ||
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. | |
714 | ||
715 | For a filter file, the error message has been fudged into an eblock. After | |
716 | dealing with it, the router declines. */ | |
717 | ||
718 | if (eblock != NULL) | |
719 | { | |
720 | if (!moan_skipped_syntax_errors( | |
721 | rblock->name, /* For message content */ | |
722 | eblock, /* Ditto */ | |
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 */ | |
727 | return DEFER; | |
728 | ||
729 | if (filtertype != FILTER_FORWARD || generated == NULL) | |
730 | { | |
731 | addr->message = US"syntax error in redirection data"; | |
732 | return DECLINE; | |
733 | } | |
734 | } | |
735 | ||
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. */ | |
741 | ||
742 | if (generated != NULL) | |
743 | { | |
744 | if ((xrc = sort_errors_and_headers(rblock, addr, verify, &addr_prop)) != OK) | |
745 | return xrc; | |
746 | add_generated(rblock, addr_new, addr, generated, &addr_prop, &ugid, pw); | |
747 | } | |
748 | ||
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. */ | |
752 | ||
753 | if (frc == FF_DELIVERED) | |
754 | { | |
755 | if (generated == NULL && !verify && !address_test_mode) | |
756 | { | |
757 | log_write(0, LOG_MAIN, "=> %s <%s> R=%s", discarded, addr->address, | |
758 | rblock->name); | |
759 | yield = DISCARD; | |
760 | } | |
761 | } | |
762 | ||
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. */ | |
771 | ||
772 | else | |
773 | { | |
774 | address_item *next; | |
775 | ||
776 | if (generated == NULL) return DECLINE; | |
777 | ||
778 | next = deliver_make_addr(addr->address, FALSE); | |
779 | next->parent = addr; | |
780 | addr->child_count++; | |
781 | next->next = *addr_new; | |
782 | *addr_new = next; | |
783 | ||
784 | /* Copy relevant flags (af_propagate is a name for the set), and set the | |
785 | data that propagates. */ | |
786 | ||
787 | copyflag(next, addr, af_propagate); | |
788 | next->p = addr_prop; | |
789 | ||
790 | DEBUG(D_route) debug_printf("%s router autogenerated %s\n%s%s%s", | |
791 | rblock->name, | |
792 | next->address, | |
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" : ""); | |
796 | } | |
797 | ||
8523533c TK |
798 | #ifdef EXPERIMENTAL_SRS |
799 | /* On successful redirection, check for SRS forwarding and adjust sender */ | |
800 | if(ob->srs != NULL) | |
801 | { | |
802 | BOOL usesrs = TRUE; | |
8e669ac1 | 803 | |
8523533c TK |
804 | if(ob->srs_condition != NULL) |
805 | usesrs = expand_check_condition(ob->srs_condition, "srs_condition expansion failed", NULL); | |
8e669ac1 | 806 | |
8523533c TK |
807 | if(usesrs) |
808 | if((Ustrcmp(ob->srs, "forward") == 0 || Ustrcmp(ob->srs, "reverseandforward") == 0) && !verify) | |
809 | { | |
810 | uschar *res; | |
811 | uschar *usedomain; | |
812 | int n_srs; | |
8e669ac1 | 813 | |
8523533c TK |
814 | srs_orig_sender = sender_address; |
815 | eximsrs_init(); | |
816 | if(ob->srs_db) | |
817 | eximsrs_db_set(FALSE, ob->srs_db); | |
818 | ||
819 | if(ob->srs_alias != NULL ? (usedomain = expand_string(ob->srs_alias)) == NULL : 1) | |
820 | usedomain = deliver_domain; | |
8e669ac1 | 821 | |
8523533c TK |
822 | if((n_srs = eximsrs_forward(&res, sender_address, usedomain)) != OK) |
823 | return n_srs; | |
824 | sender_address = res; | |
825 | DEBUG(D_any) | |
826 | debug_printf("SRS: Sender '%s' rewritten to '%s'\n", srs_orig_sender, sender_address); | |
827 | } | |
828 | } | |
829 | #endif | |
830 | ||
0756eb3c PH |
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. */ | |
834 | ||
835 | addr->next = *addr_succeed; | |
836 | *addr_succeed = addr; | |
837 | ||
838 | return yield; | |
839 | } | |
840 | ||
841 | /* End of routers/redirect.c */ |