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d6a96edc | 1 | /* $Cambridge: exim/src/src/routers/redirect.c,v 1.18 2006/11/20 11:43:40 ph10 Exp $ */ |
0756eb3c PH |
2 | |
3 | /************************************************* | |
4 | * Exim - an Internet mail transport agent * | |
5 | *************************************************/ | |
6 | ||
d7d7b7b9 | 7 | /* Copyright (c) University of Cambridge 1995 - 2006 */ |
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) }, | |
4608d683 PH |
42 | { "filter_prepend_home",opt_bit | (RDON_PREPEND_HOME << 16), |
43 | (void *)offsetof(redirect_router_options_block, bit_options) }, | |
0756eb3c PH |
44 | { "forbid_blackhole", opt_bit | (RDON_BLACKHOLE << 16), |
45 | (void *)offsetof(redirect_router_options_block, bit_options) }, | |
23c7ff99 PH |
46 | { "forbid_exim_filter", opt_bit | (RDON_EXIM_FILTER << 16), |
47 | (void *)offsetof(redirect_router_options_block, bit_options) }, | |
0756eb3c PH |
48 | { "forbid_file", opt_bool, |
49 | (void *)offsetof(redirect_router_options_block, forbid_file) }, | |
1a46a8c5 PH |
50 | { "forbid_filter_dlfunc", opt_bit | (RDON_DLFUNC << 16), |
51 | (void *)offsetof(redirect_router_options_block, bit_options) }, | |
0756eb3c PH |
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) }, | |
0756eb3c PH |
58 | { "forbid_filter_perl", opt_bit | (RDON_PERL << 16), |
59 | (void *)offsetof(redirect_router_options_block, bit_options) }, | |
0756eb3c PH |
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) }, | |
23c7ff99 PH |
72 | { "forbid_sieve_filter",opt_bit | (RDON_SIEVE_FILTER << 16), |
73 | (void *)offsetof(redirect_router_options_block, bit_options) }, | |
a5bd321b PH |
74 | { "forbid_smtp_code", opt_bool, |
75 | (void *)offsetof(redirect_router_options_block, forbid_smtp_code) }, | |
0756eb3c PH |
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) }, | |
e4a89c47 PH |
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) }, | |
0756eb3c PH |
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) }, | |
8523533c TK |
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) }, | |
384152a6 TK |
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) }, | |
8523533c | 123 | #endif |
0756eb3c PH |
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) } | |
128 | }; | |
129 | ||
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. */ | |
132 | ||
133 | int redirect_router_options_count = | |
134 | sizeof(redirect_router_options)/sizeof(optionlist); | |
135 | ||
136 | /* Default private options block for the redirect router. */ | |
137 | ||
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 */ | |
143 | NULL, /* data */ | |
144 | NULL, /* directory_transport_name */ | |
145 | NULL, /* file */ | |
146 | NULL, /* file_dir */ | |
147 | NULL, /* file_transport_name */ | |
148 | NULL, /* include_directory */ | |
149 | NULL, /* pipe_transport_name */ | |
150 | NULL, /* reply_transport_name */ | |
e4a89c47 PH |
151 | NULL, /* sieve_subaddress */ |
152 | NULL, /* sieve_useraddress */ | |
0756eb3c PH |
153 | NULL, /* sieve_vacation_directory */ |
154 | NULL, /* syntax_errors_text */ | |
155 | NULL, /* syntax_errors_to */ | |
156 | NULL, /* qualify_domain */ | |
157 | NULL, /* owners */ | |
158 | NULL, /* owngroups */ | |
8523533c TK |
159 | #ifdef EXPERIMENTAL_SRS |
160 | NULL, /* srs */ | |
8523533c | 161 | NULL, /* srs_alias */ |
384152a6 TK |
162 | NULL, /* srs_condition */ |
163 | NULL, /* srs_dbinsert */ | |
164 | NULL, /* srs_dbselect */ | |
8523533c | 165 | #endif |
0756eb3c | 166 | 022, /* modemask */ |
4608d683 | 167 | RDO_REWRITE | RDO_PREPEND_HOME, /* bit_options */ |
0756eb3c PH |
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 */ | |
a5bd321b | 174 | FALSE, /* forbid_smtp_code */ |
0756eb3c PH |
175 | FALSE, /* hide_child_in_errmsg */ |
176 | FALSE, /* one_time */ | |
177 | FALSE, /* qualify_preserve_domain */ | |
178 | FALSE /* skip_syntax_errors */ | |
179 | }; | |
180 | ||
181 | ||
182 | ||
183 | /************************************************* | |
184 | * Initialization entry point * | |
185 | *************************************************/ | |
186 | ||
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. */ | |
189 | ||
190 | void redirect_router_init(router_instance *rblock) | |
191 | { | |
192 | redirect_router_options_block *ob = | |
193 | (redirect_router_options_block *)(rblock->options_block); | |
194 | ||
195 | /* Either file or data must be set, but not both */ | |
196 | ||
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 "); | |
201 | ||
7f45268c PH |
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. */ | |
0756eb3c PH |
206 | |
207 | if (ob->one_time) | |
208 | { | |
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); | |
7f45268c PH |
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); | |
0756eb3c PH |
217 | } |
218 | ||
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. */ | |
223 | ||
224 | if (ob->check_owner == TRUE_UNSET) | |
225 | ob->check_owner = rblock->check_local_user || | |
226 | (ob->owners != NULL && ob->owners[0] != 0); | |
227 | ||
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); | |
231 | ||
232 | /* If explicit qualify domain set, the preserve option is locked out */ | |
233 | ||
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", | |
237 | rblock->name); | |
238 | ||
239 | /* If allow_filter is set, either user or check_local_user must be set. */ | |
240 | ||
241 | if (!rblock->check_local_user && | |
242 | !rblock->uid_set && | |
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\"", | |
247 | rblock->name); | |
248 | } | |
249 | ||
250 | ||
251 | ||
252 | /************************************************* | |
253 | * Get errors address and header mods * | |
254 | *************************************************/ | |
255 | ||
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. | |
262 | ||
263 | Arguments: | |
264 | rblock the router control block | |
265 | addr the address being routed | |
fd6de02e | 266 | verify v_none/v_recipient/v_sender/v_expn |
0756eb3c PH |
267 | addr_prop point to the propagated block, which is where the |
268 | new values are to be placed | |
269 | ||
270 | Returns: the result of rf_get_errors_address() or rf_get_munge_headers(), | |
271 | which is either OK or DEFER | |
272 | */ | |
273 | ||
274 | static int | |
275 | sort_errors_and_headers(router_instance *rblock, address_item *addr, | |
fd6de02e | 276 | int verify, address_item_propagated *addr_prop) |
0756eb3c PH |
277 | { |
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)); | |
284 | } | |
285 | ||
286 | ||
287 | ||
288 | /************************************************* | |
289 | * Process a set of generated new addresses * | |
290 | *************************************************/ | |
291 | ||
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. | |
296 | ||
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 | |
304 | delivered. | |
305 | ||
306 | Arguments: | |
307 | rblock router block | |
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 | |
315 | ||
316 | Returns: nothing | |
317 | */ | |
318 | ||
319 | static void | |
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) | |
323 | { | |
324 | redirect_router_options_block *ob = | |
325 | (redirect_router_options_block *)(rblock->options_block); | |
326 | ||
327 | while (generated != NULL) | |
328 | { | |
329 | address_item *parent; | |
330 | address_item *next = generated; | |
331 | uschar *errors_address = next->p.errors_address; | |
332 | ||
333 | generated = next->next; | |
334 | next->parent = addr; | |
335 | orflag(next, addr, af_ignore_error); | |
336 | next->start_router = rblock->redirect_router; | |
337 | addr->child_count++; | |
338 | ||
339 | next->next = *addr_new; | |
340 | *addr_new = next; | |
341 | ||
342 | /* Don't do the "one_time" thing for the first pass of a 2-stage queue run. */ | |
343 | ||
344 | if (ob->one_time && !queue_2stage) | |
345 | { | |
346 | for (parent = addr; parent->parent != NULL; parent = parent->parent); | |
347 | next->onetime_parent = parent->address; | |
348 | } | |
349 | ||
350 | if (ob->hide_child_in_errmsg) setflag(next, af_hide_child); | |
351 | ||
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. */ | |
355 | ||
356 | if (ob->check_ancestor) | |
357 | { | |
358 | for (parent = addr; parent != NULL; parent = parent->parent) | |
359 | { | |
360 | if (((parent->router != NULL && parent->router->caseful_local_part)? | |
361 | Ustrcmp(next->address, parent->address) | |
362 | : | |
363 | strcmpic(next->address, parent->address) | |
364 | ) == 0) | |
365 | { | |
366 | DEBUG(D_route) debug_printf("generated parent replaced by child\n"); | |
367 | next->address = string_copy(addr->address); | |
368 | break; | |
369 | } | |
370 | } | |
371 | } | |
372 | ||
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. */ | |
376 | ||
377 | next->p = *addr_prop; | |
378 | if (errors_address != NULL) next->p.errors_address = errors_address; | |
379 | ||
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. */ | |
383 | ||
384 | if (testflag(next, af_pfr)) | |
385 | { | |
386 | next->router = rblock; | |
387 | rf_set_ugid(next, ugidptr); /* Will contain pw values if not overridden */ | |
388 | ||
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. */ | |
392 | ||
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)) | |
399 | { | |
400 | next->home_dir = deliver_home; | |
401 | setflag(next, af_home_expanded); | |
402 | } | |
403 | ||
404 | next->current_dir = rblock->current_directory; | |
405 | ||
406 | /* Permission options */ | |
407 | ||
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); | |
411 | ||
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. */ | |
414 | ||
415 | if (next->address[0] == '|') | |
416 | { | |
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; | |
421 | address_pipe = NULL; | |
422 | } | |
423 | else if (next->address[0] == '>') | |
424 | { | |
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; | |
428 | } | |
429 | else /* must be file or directory */ | |
430 | { | |
431 | int len = Ustrlen(next->address); | |
432 | address_file = next->address; | |
433 | if (next->address[len-1] == '/') | |
434 | { | |
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; | |
439 | } | |
440 | else | |
441 | { | |
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; | |
445 | } | |
446 | address_file = NULL; | |
447 | } | |
448 | } | |
449 | ||
450 | DEBUG(D_route) | |
451 | { | |
452 | debug_printf("%s router generated %s\n %serrors_to=%s transport=%s\n", | |
453 | rblock->name, | |
454 | next->address, | |
455 | testflag(next, af_pfr)? "pipe, file, or autoreply\n " : "", | |
456 | next->p.errors_address, | |
457 | (next->transport == NULL)? US"NULL" : next->transport->name); | |
458 | ||
459 | if (testflag(next, af_uid_set)) | |
460 | debug_printf(" uid=%ld ", (long int)(next->uid)); | |
461 | else | |
462 | debug_printf(" uid=unset "); | |
463 | ||
464 | if (testflag(next, af_gid_set)) | |
465 | debug_printf("gid=%ld ", (long int)(next->gid)); | |
466 | else | |
467 | debug_printf("gid=unset "); | |
468 | ||
469 | debug_printf("home=%s\n", next->home_dir); | |
470 | } | |
471 | } | |
472 | } | |
473 | ||
474 | ||
475 | /************************************************* | |
476 | * Main entry point * | |
477 | *************************************************/ | |
478 | ||
479 | /* See local README for interface description. This router returns: | |
480 | ||
481 | DECLINE | |
482 | . empty address list, or filter did nothing significant | |
483 | ||
484 | DEFER | |
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 | |
492 | ||
493 | DISCARD | |
494 | . address was :blackhole:d or "seen finish"ed | |
495 | ||
496 | FAIL | |
497 | . :fail: | |
498 | ||
499 | OK | |
500 | . new addresses added to addr_new | |
501 | */ | |
502 | ||
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 */ | |
fd6de02e | 507 | int verify, /* v_none/v_recipient/v_sender/v_expn */ |
0756eb3c PH |
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 */ | |
512 | { | |
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; | |
520 | ugid_block ugid; | |
521 | redirect_block redirect; | |
522 | int filtertype = FILTER_UNSET; | |
523 | int yield = OK; | |
524 | int options = ob->bit_options; | |
525 | int frc = 0; | |
526 | int xrc = 0; | |
527 | ||
528 | addr_local = addr_local; /* Keep picky compilers happy */ | |
529 | addr_remote = addr_remote; | |
530 | ||
531 | /* Initialize the data to be propagated to the children */ | |
532 | ||
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; | |
539 | ||
384152a6 TK |
540 | #ifdef EXPERIMENTAL_SRS |
541 | addr_prop.srs_sender = NULL; | |
542 | #endif | |
543 | ||
0756eb3c PH |
544 | /* When verifying and testing addresses, the "logwrite" command in filters |
545 | must be bypassed. */ | |
546 | ||
fd6de02e | 547 | if (verify == v_none && !address_test_mode) options |= RDO_REALLOG; |
0756eb3c PH |
548 | |
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. */ | |
554 | ||
555 | if (!rf_get_ugid(rblock, addr, &ugid)) return DEFER; | |
556 | ||
557 | if (!ugid.uid_set && pw != NULL) | |
558 | { | |
559 | ugid.uid = pw->pw_uid; | |
560 | ugid.uid_set = TRUE; | |
561 | } | |
562 | ||
563 | if (!ugid.gid_set && pw != NULL) | |
564 | { | |
565 | ugid.gid = pw->pw_gid; | |
566 | ugid.gid_set = TRUE; | |
567 | } | |
568 | ||
8523533c | 569 | #ifdef EXPERIMENTAL_SRS |
384152a6 TK |
570 | /* Perform SRS on recipient/return-path as required */ |
571 | ||
8523533c TK |
572 | if(ob->srs != NULL) |
573 | { | |
574 | BOOL usesrs = TRUE; | |
8e669ac1 | 575 | |
8523533c TK |
576 | if(ob->srs_condition != NULL) |
577 | usesrs = expand_check_condition(ob->srs_condition, "srs_condition expansion failed", NULL); | |
8e669ac1 | 578 | |
8523533c | 579 | if(usesrs) |
384152a6 | 580 | { |
5614ee86 | 581 | int srs_action = 0, n_srs; |
384152a6 TK |
582 | uschar *res; |
583 | uschar *usedomain; | |
584 | ||
585 | /* What are we doing? */ | |
586 | if(Ustrcmp(ob->srs, "forward") == 0) | |
587 | srs_action = 1; | |
588 | else if(Ustrcmp(ob->srs, "reverseandforward") == 0) | |
8523533c | 589 | { |
384152a6 | 590 | srs_action = 3; |
8e669ac1 | 591 | |
384152a6 TK |
592 | if((ob->srs_dbinsert == NULL) ^ (ob->srs_dbselect == NULL)) |
593 | return DEFER; | |
594 | } | |
595 | else if(Ustrcmp(ob->srs, "reverse") == 0) | |
596 | srs_action = 2; | |
597 | ||
598 | /* Reverse SRS */ | |
599 | if(srs_action & 2) | |
600 | { | |
8523533c | 601 | srs_orig_recipient = addr->address; |
384152a6 | 602 | |
8523533c | 603 | eximsrs_init(); |
384152a6 TK |
604 | if(ob->srs_dbselect) |
605 | eximsrs_db_set(TRUE, ob->srs_dbselect); | |
130e9641 | 606 | /* Comment this out for now... |
384152a6 TK |
607 | // else |
608 | // eximsrs_db_set(TRUE, NULL); | |
130e9641 | 609 | */ |
384152a6 TK |
610 | |
611 | if((n_srs = eximsrs_reverse(&res, addr->address)) == OK) | |
612 | { | |
613 | srs_recipient = res; | |
614 | DEBUG(D_any) | |
615 | debug_printf("SRS (reverse): Recipient '%s' rewritten to '%s'\n", srs_orig_recipient, srs_recipient); | |
616 | } | |
617 | ||
618 | eximsrs_done(); | |
619 | ||
620 | if(n_srs != OK) | |
8523533c | 621 | return n_srs; |
384152a6 TK |
622 | } |
623 | ||
624 | /* Forward SRS */ | |
625 | /* No point in actually performing SRS if we are just verifying a recipient */ | |
fd6de02e PH |
626 | if((srs_action & 1) && verify == v_none && |
627 | (sender_address ? sender_address[0] != 0 : FALSE)) | |
384152a6 TK |
628 | { |
629 | ||
630 | srs_orig_sender = sender_address; | |
631 | eximsrs_init(); | |
632 | if(ob->srs_dbinsert) | |
633 | eximsrs_db_set(FALSE, ob->srs_dbinsert); | |
130e9641 | 634 | /* Comment this out for now... |
384152a6 TK |
635 | // else |
636 | // eximsrs_db_set(FALSE, NULL); | |
130e9641 | 637 | */ |
384152a6 TK |
638 | |
639 | if(ob->srs_alias != NULL ? (usedomain = expand_string(ob->srs_alias)) == NULL : 1) | |
640 | usedomain = deliver_domain; | |
641 | ||
642 | if((n_srs = eximsrs_forward(&res, sender_address, usedomain)) == OK) | |
643 | { | |
644 | addr_prop.srs_sender = res; | |
645 | DEBUG(D_any) | |
646 | debug_printf("SRS (forward): Sender '%s' rewritten to '%s'\n", srs_orig_sender, res); | |
647 | } | |
648 | ||
8523533c | 649 | eximsrs_done(); |
384152a6 TK |
650 | |
651 | if(n_srs != OK) | |
652 | return n_srs; | |
8523533c | 653 | } |
384152a6 | 654 | } |
8523533c TK |
655 | } |
656 | #endif | |
657 | ||
0756eb3c PH |
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. */ | |
664 | ||
665 | if (ob->qualify_preserve_domain) | |
666 | qualify_domain_recipient = addr->domain; | |
667 | else if (ob->qualify_domain != NULL) | |
668 | { | |
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; | |
672 | } | |
673 | ||
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; | |
679 | redirect.pw = pw; | |
680 | ||
681 | if (ob->file != NULL) | |
682 | { | |
683 | redirect.string = ob->file; | |
684 | redirect.isfile = TRUE; | |
685 | } | |
686 | else | |
687 | { | |
688 | redirect.string = ob->data; | |
689 | redirect.isfile = FALSE; | |
690 | } | |
691 | ||
692 | frc = rda_interpret(&redirect, options, ob->include_directory, | |
e4a89c47 PH |
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, | |
696 | addr->address)); | |
0756eb3c PH |
697 | |
698 | qualify_domain_recipient = save_qualify_domain_recipient; | |
699 | ||
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. */ | |
702 | ||
703 | switch (frc) | |
704 | { | |
705 | case FF_NONEXIST: | |
706 | addr->message = addr->user_message = NULL; | |
707 | return DECLINE; | |
708 | ||
709 | case FF_BLACKHOLE: | |
710 | DEBUG(D_route) debug_printf("address :blackhole:d\n"); | |
711 | generated = NULL; | |
712 | discarded = US":blackhole:"; | |
713 | frc = FF_DELIVERED; | |
714 | break; | |
715 | ||
716 | /* FF_DEFER and FF_FAIL can arise only as a result of explicit commands | |
a5bd321b PH |
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. */ | |
0756eb3c PH |
720 | |
721 | case FF_DEFER: | |
a5bd321b PH |
722 | yield = DEFER; |
723 | goto SORT_MESSAGE; | |
0756eb3c PH |
724 | |
725 | case FF_FAIL: | |
726 | if ((xrc = sort_errors_and_headers(rblock, addr, verify, &addr_prop)) != OK) | |
727 | return xrc; | |
728 | add_generated(rblock, addr_new, addr, generated, &addr_prop, &ugid, pw); | |
a5bd321b PH |
729 | yield = FAIL; |
730 | ||
731 | SORT_MESSAGE: | |
447d236c | 732 | if (addr->message == NULL) |
a5bd321b | 733 | addr->message = (yield == FAIL)? US"forced rejection" : US"forced defer"; |
447d236c PH |
734 | else |
735 | { | |
a5bd321b PH |
736 | int ovector[3]; |
737 | if (ob->forbid_smtp_code && | |
738 | pcre_exec(regex_smtp_code, NULL, CS addr->message, | |
d6a96edc PH |
739 | Ustrlen(addr->message), 0, PCRE_EOPT, |
740 | ovector, sizeof(ovector)/sizeof(int)) >= 0) | |
a5bd321b PH |
741 | { |
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]; | |
745 | } | |
447d236c PH |
746 | addr->user_message = addr->message; |
747 | setflag(addr, af_pass_message); | |
748 | } | |
a5bd321b | 749 | return yield; |
0756eb3c PH |
750 | |
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. */ | |
754 | ||
755 | case FF_FREEZE: | |
756 | if (!deliver_manual_thaw) | |
757 | { | |
758 | if ((xrc = sort_errors_and_headers(rblock, addr, verify, &addr_prop)) | |
759 | != OK) return xrc; | |
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; | |
764 | return DEFER; | |
765 | } | |
766 | frc = FF_NOTDELIVERED; | |
767 | break; | |
768 | ||
769 | /* Handle syntax errors and :include: failures and lookup defers */ | |
770 | ||
771 | case FF_ERROR: | |
772 | case FF_INCLUDEFAIL: | |
773 | ||
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 | |
777 | sufficient. */ | |
778 | ||
779 | if (filtertype == FILTER_UNSET) return DEFER; | |
780 | ||
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. */ | |
783 | ||
784 | if (filtertype != FILTER_FORWARD && ob->skip_syntax_errors) | |
785 | { | |
786 | eblock = store_get(sizeof(error_block)); | |
787 | eblock->next = NULL; | |
788 | eblock->text1 = addr->message; | |
789 | eblock->text2 = NULL; | |
790 | addr->message = addr->user_message = NULL; | |
791 | } | |
792 | ||
793 | /* Otherwise set up the error for the address and defer. */ | |
794 | ||
795 | else | |
796 | { | |
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", | |
801 | addr->message); | |
802 | return DEFER; | |
803 | } | |
804 | } | |
805 | ||
806 | ||
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. | |
810 | ||
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. | |
816 | ||
817 | For a filter file, the error message has been fudged into an eblock. After | |
818 | dealing with it, the router declines. */ | |
819 | ||
820 | if (eblock != NULL) | |
821 | { | |
822 | if (!moan_skipped_syntax_errors( | |
fd6de02e PH |
823 | rblock->name, /* For message content */ |
824 | eblock, /* Ditto */ | |
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 */ | |
0756eb3c PH |
829 | return DEFER; |
830 | ||
831 | if (filtertype != FILTER_FORWARD || generated == NULL) | |
832 | { | |
833 | addr->message = US"syntax error in redirection data"; | |
834 | return DECLINE; | |
835 | } | |
836 | } | |
837 | ||
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. */ | |
843 | ||
844 | if (generated != NULL) | |
845 | { | |
846 | if ((xrc = sort_errors_and_headers(rblock, addr, verify, &addr_prop)) != OK) | |
847 | return xrc; | |
848 | add_generated(rblock, addr_new, addr, generated, &addr_prop, &ugid, pw); | |
849 | } | |
850 | ||
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. */ | |
854 | ||
855 | if (frc == FF_DELIVERED) | |
856 | { | |
fd6de02e | 857 | if (generated == NULL && verify == v_none && !address_test_mode) |
0756eb3c PH |
858 | { |
859 | log_write(0, LOG_MAIN, "=> %s <%s> R=%s", discarded, addr->address, | |
860 | rblock->name); | |
861 | yield = DISCARD; | |
862 | } | |
863 | } | |
864 | ||
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. */ | |
873 | ||
874 | else | |
875 | { | |
876 | address_item *next; | |
877 | ||
878 | if (generated == NULL) return DECLINE; | |
879 | ||
880 | next = deliver_make_addr(addr->address, FALSE); | |
881 | next->parent = addr; | |
882 | addr->child_count++; | |
883 | next->next = *addr_new; | |
884 | *addr_new = next; | |
885 | ||
886 | /* Copy relevant flags (af_propagate is a name for the set), and set the | |
887 | data that propagates. */ | |
888 | ||
889 | copyflag(next, addr, af_propagate); | |
890 | next->p = addr_prop; | |
891 | ||
892 | DEBUG(D_route) debug_printf("%s router autogenerated %s\n%s%s%s", | |
893 | rblock->name, | |
894 | next->address, | |
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" : ""); | |
898 | } | |
899 | ||
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. */ | |
903 | ||
904 | addr->next = *addr_succeed; | |
905 | *addr_succeed = addr; | |
906 | ||
907 | return yield; | |
908 | } | |
909 | ||
910 | /* End of routers/redirect.c */ |