Commit | Line | Data |
---|---|---|
059ec3d9 PH |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
3386088d | 5 | /* Copyright (c) University of Cambridge 1995 - 2015 */ |
059ec3d9 PH |
6 | /* See the file NOTICE for conditions of use and distribution. */ |
7 | ||
8 | /* General functions concerned with transportation, and generic options for all | |
9 | transports. */ | |
10 | ||
11 | ||
12 | #include "exim.h" | |
13 | ||
a8530a10 TK |
14 | #ifdef HAVE_LINUX_SENDFILE |
15 | #include <sys/sendfile.h> | |
16 | #endif | |
059ec3d9 PH |
17 | |
18 | /* Structure for keeping list of addresses that have been added to | |
19 | Envelope-To:, in order to avoid duplication. */ | |
20 | ||
21 | struct aci { | |
22 | struct aci *next; | |
23 | address_item *ptr; | |
24 | }; | |
25 | ||
26 | ||
27 | /* Static data for write_chunk() */ | |
28 | ||
29 | static uschar *chunk_ptr; /* chunk pointer */ | |
30 | static uschar *nl_check; /* string to look for at line start */ | |
31 | static int nl_check_length; /* length of same */ | |
32 | static uschar *nl_escape; /* string to insert */ | |
33 | static int nl_escape_length; /* length of same */ | |
34 | static int nl_partial_match; /* length matched at chunk end */ | |
35 | ||
36 | ||
37 | /* Generic options for transports, all of which live inside transport_instance | |
38 | data blocks and which therefore have the opt_public flag set. Note that there | |
39 | are other options living inside this structure which can be set only from | |
40 | certain transports. */ | |
41 | ||
42 | optionlist optionlist_transports[] = { | |
43 | { "*expand_group", opt_stringptr|opt_hidden|opt_public, | |
44 | (void *)offsetof(transport_instance, expand_gid) }, | |
45 | { "*expand_user", opt_stringptr|opt_hidden|opt_public, | |
46 | (void *)offsetof(transport_instance, expand_uid) }, | |
47 | { "*headers_rewrite_flags", opt_int|opt_public|opt_hidden, | |
48 | (void *)offsetof(transport_instance, rewrite_existflags) }, | |
49 | { "*headers_rewrite_rules", opt_void|opt_public|opt_hidden, | |
50 | (void *)offsetof(transport_instance, rewrite_rules) }, | |
51 | { "*set_group", opt_bool|opt_hidden|opt_public, | |
52 | (void *)offsetof(transport_instance, gid_set) }, | |
53 | { "*set_user", opt_bool|opt_hidden|opt_public, | |
54 | (void *)offsetof(transport_instance, uid_set) }, | |
55 | { "body_only", opt_bool|opt_public, | |
56 | (void *)offsetof(transport_instance, body_only) }, | |
57 | { "current_directory", opt_stringptr|opt_public, | |
58 | (void *)offsetof(transport_instance, current_dir) }, | |
59 | { "debug_print", opt_stringptr | opt_public, | |
60 | (void *)offsetof(transport_instance, debug_string) }, | |
61 | { "delivery_date_add", opt_bool|opt_public, | |
62 | (void *)(offsetof(transport_instance, delivery_date_add)) }, | |
63 | { "disable_logging", opt_bool|opt_public, | |
64 | (void *)(offsetof(transport_instance, disable_logging)) }, | |
65 | { "driver", opt_stringptr|opt_public, | |
66 | (void *)offsetof(transport_instance, driver_name) }, | |
67 | { "envelope_to_add", opt_bool|opt_public, | |
68 | (void *)(offsetof(transport_instance, envelope_to_add)) }, | |
0cbf2b82 | 69 | #ifndef DISABLE_EVENT |
774ef2d7 JH |
70 | { "event_action", opt_stringptr | opt_public, |
71 | (void *)offsetof(transport_instance, event_action) }, | |
72 | #endif | |
059ec3d9 PH |
73 | { "group", opt_expand_gid|opt_public, |
74 | (void *)offsetof(transport_instance, gid) }, | |
846726c5 | 75 | { "headers_add", opt_stringptr|opt_public|opt_rep_str, |
059ec3d9 PH |
76 | (void *)offsetof(transport_instance, add_headers) }, |
77 | { "headers_only", opt_bool|opt_public, | |
78 | (void *)offsetof(transport_instance, headers_only) }, | |
846726c5 | 79 | { "headers_remove", opt_stringptr|opt_public|opt_rep_str, |
059ec3d9 PH |
80 | (void *)offsetof(transport_instance, remove_headers) }, |
81 | { "headers_rewrite", opt_rewrite|opt_public, | |
82 | (void *)offsetof(transport_instance, headers_rewrite) }, | |
83 | { "home_directory", opt_stringptr|opt_public, | |
84 | (void *)offsetof(transport_instance, home_dir) }, | |
85 | { "initgroups", opt_bool|opt_public, | |
86 | (void *)offsetof(transport_instance, initgroups) }, | |
fa41615d JH |
87 | { "max_parallel", opt_stringptr|opt_public, |
88 | (void *)offsetof(transport_instance, max_parallel) }, | |
059ec3d9 PH |
89 | { "message_size_limit", opt_stringptr|opt_public, |
90 | (void *)offsetof(transport_instance, message_size_limit) }, | |
91 | { "rcpt_include_affixes", opt_bool|opt_public, | |
92 | (void *)offsetof(transport_instance, rcpt_include_affixes) }, | |
93 | { "retry_use_local_part", opt_bool|opt_public, | |
94 | (void *)offsetof(transport_instance, retry_use_local_part) }, | |
95 | { "return_path", opt_stringptr|opt_public, | |
96 | (void *)(offsetof(transport_instance, return_path)) }, | |
97 | { "return_path_add", opt_bool|opt_public, | |
98 | (void *)(offsetof(transport_instance, return_path_add)) }, | |
99 | { "shadow_condition", opt_stringptr|opt_public, | |
100 | (void *)offsetof(transport_instance, shadow_condition) }, | |
101 | { "shadow_transport", opt_stringptr|opt_public, | |
102 | (void *)offsetof(transport_instance, shadow) }, | |
103 | { "transport_filter", opt_stringptr|opt_public, | |
104 | (void *)offsetof(transport_instance, filter_command) }, | |
105 | { "transport_filter_timeout", opt_time|opt_public, | |
106 | (void *)offsetof(transport_instance, filter_timeout) }, | |
107 | { "user", opt_expand_uid|opt_public, | |
108 | (void *)offsetof(transport_instance, uid) } | |
109 | }; | |
110 | ||
111 | int optionlist_transports_size = | |
112 | sizeof(optionlist_transports)/sizeof(optionlist); | |
113 | ||
114 | ||
115 | /************************************************* | |
116 | * Initialize transport list * | |
117 | *************************************************/ | |
118 | ||
119 | /* Read the transports section of the configuration file, and set up a chain of | |
120 | transport instances according to its contents. Each transport has generic | |
121 | options and may also have its own private options. This function is only ever | |
122 | called when transports == NULL. We use generic code in readconf to do most of | |
123 | the work. */ | |
124 | ||
125 | void | |
126 | transport_init(void) | |
127 | { | |
128 | transport_instance *t; | |
129 | ||
130 | readconf_driver_init(US"transport", | |
131 | (driver_instance **)(&transports), /* chain anchor */ | |
132 | (driver_info *)transports_available, /* available drivers */ | |
133 | sizeof(transport_info), /* size of info block */ | |
134 | &transport_defaults, /* default values for generic options */ | |
135 | sizeof(transport_instance), /* size of instance block */ | |
136 | optionlist_transports, /* generic options */ | |
137 | optionlist_transports_size); | |
138 | ||
139 | /* Now scan the configured transports and check inconsistencies. A shadow | |
140 | transport is permitted only for local transports. */ | |
141 | ||
142 | for (t = transports; t != NULL; t = t->next) | |
143 | { | |
144 | if (!t->info->local) | |
145 | { | |
146 | if (t->shadow != NULL) | |
147 | log_write(0, LOG_PANIC_DIE|LOG_CONFIG, | |
148 | "shadow transport not allowed on non-local transport %s", t->name); | |
149 | } | |
150 | ||
151 | if (t->body_only && t->headers_only) | |
152 | log_write(0, LOG_PANIC_DIE|LOG_CONFIG, | |
153 | "%s transport: body_only and headers_only are mutually exclusive", | |
154 | t->name); | |
155 | } | |
156 | } | |
157 | ||
158 | ||
159 | ||
160 | /************************************************* | |
161 | * Write block of data * | |
162 | *************************************************/ | |
163 | ||
164 | /* Subroutine called by write_chunk() and at the end of the message actually | |
165 | to write a data block. Also called directly by some transports to write | |
166 | additional data to the file descriptor (e.g. prefix, suffix). | |
167 | ||
168 | If a transport wants data transfers to be timed, it sets a non-zero value in | |
169 | transport_write_timeout. A non-zero transport_write_timeout causes a timer to | |
170 | be set for each block of data written from here. If time runs out, then write() | |
171 | fails and provokes an error return. The caller can then inspect sigalrm_seen to | |
172 | check for a timeout. | |
173 | ||
174 | On some systems, if a quota is exceeded during the write, the yield is the | |
175 | number of bytes written rather than an immediate error code. This also happens | |
176 | on some systems in other cases, for example a pipe that goes away because the | |
177 | other end's process terminates (Linux). On other systems, (e.g. Solaris 2) you | |
178 | get the error codes the first time. | |
179 | ||
180 | The write() function is also interruptible; the Solaris 2.6 man page says: | |
181 | ||
182 | If write() is interrupted by a signal before it writes any | |
183 | data, it will return -1 with errno set to EINTR. | |
184 | ||
185 | If write() is interrupted by a signal after it successfully | |
186 | writes some data, it will return the number of bytes written. | |
187 | ||
188 | To handle these cases, we want to restart the write() to output the remainder | |
189 | of the data after a non-negative return from write(), except after a timeout. | |
190 | In the error cases (EDQUOT, EPIPE) no bytes get written the second time, and a | |
191 | proper error then occurs. In principle, after an interruption, the second | |
192 | write() could suffer the same fate, but we do not want to continue for | |
193 | evermore, so stick a maximum repetition count on the loop to act as a | |
194 | longstop. | |
195 | ||
196 | Arguments: | |
197 | fd file descriptor to write to | |
198 | block block of bytes to write | |
199 | len number of bytes to write | |
200 | ||
201 | Returns: TRUE on success, FALSE on failure (with errno preserved); | |
202 | transport_count is incremented by the number of bytes written | |
203 | */ | |
204 | ||
205 | BOOL | |
206 | transport_write_block(int fd, uschar *block, int len) | |
207 | { | |
208 | int i, rc, save_errno; | |
958541e9 PH |
209 | int local_timeout = transport_write_timeout; |
210 | ||
211 | /* This loop is for handling incomplete writes and other retries. In most | |
212 | normal cases, it is only ever executed once. */ | |
059ec3d9 PH |
213 | |
214 | for (i = 0; i < 100; i++) | |
215 | { | |
216 | DEBUG(D_transport) | |
217 | debug_printf("writing data block fd=%d size=%d timeout=%d\n", | |
958541e9 | 218 | fd, len, local_timeout); |
059ec3d9 | 219 | |
958541e9 PH |
220 | /* This code makes use of alarm() in order to implement the timeout. This |
221 | isn't a very tidy way of doing things. Using non-blocking I/O with select() | |
222 | provides a neater approach. However, I don't know how to do this when TLS is | |
223 | in use. */ | |
059ec3d9 | 224 | |
958541e9 PH |
225 | if (transport_write_timeout <= 0) /* No timeout wanted */ |
226 | { | |
227 | #ifdef SUPPORT_TLS | |
817d9f57 | 228 | if (tls_out.active == fd) rc = tls_write(FALSE, block, len); else |
958541e9 PH |
229 | #endif |
230 | rc = write(fd, block, len); | |
231 | save_errno = errno; | |
232 | } | |
059ec3d9 | 233 | |
958541e9 | 234 | /* Timeout wanted. */ |
059ec3d9 | 235 | |
958541e9 | 236 | else |
059ec3d9 | 237 | { |
958541e9 PH |
238 | alarm(local_timeout); |
239 | #ifdef SUPPORT_TLS | |
817d9f57 | 240 | if (tls_out.active == fd) rc = tls_write(FALSE, block, len); else |
958541e9 PH |
241 | #endif |
242 | rc = write(fd, block, len); | |
243 | save_errno = errno; | |
244 | local_timeout = alarm(0); | |
059ec3d9 PH |
245 | if (sigalrm_seen) |
246 | { | |
247 | errno = ETIMEDOUT; | |
248 | return FALSE; | |
249 | } | |
250 | } | |
251 | ||
252 | /* Hopefully, the most common case is success, so test that first. */ | |
253 | ||
254 | if (rc == len) { transport_count += len; return TRUE; } | |
255 | ||
958541e9 PH |
256 | /* A non-negative return code is an incomplete write. Try again for the rest |
257 | of the block. If we have exactly hit the timeout, give up. */ | |
059ec3d9 PH |
258 | |
259 | if (rc >= 0) | |
260 | { | |
261 | len -= rc; | |
262 | block += rc; | |
263 | transport_count += rc; | |
264 | DEBUG(D_transport) debug_printf("write incomplete (%d)\n", rc); | |
958541e9 | 265 | goto CHECK_TIMEOUT; /* A few lines below */ |
059ec3d9 PH |
266 | } |
267 | ||
268 | /* A negative return code with an EINTR error is another form of | |
269 | incomplete write, zero bytes having been written */ | |
270 | ||
271 | if (save_errno == EINTR) | |
272 | { | |
273 | DEBUG(D_transport) | |
274 | debug_printf("write interrupted before anything written\n"); | |
958541e9 | 275 | goto CHECK_TIMEOUT; /* A few lines below */ |
059ec3d9 PH |
276 | } |
277 | ||
278 | /* A response of EAGAIN from write() is likely only in the case of writing | |
279 | to a FIFO that is not swallowing the data as fast as Exim is writing it. */ | |
280 | ||
281 | if (save_errno == EAGAIN) | |
282 | { | |
283 | DEBUG(D_transport) | |
284 | debug_printf("write temporarily locked out, waiting 1 sec\n"); | |
285 | sleep(1); | |
958541e9 PH |
286 | |
287 | /* Before continuing to try another write, check that we haven't run out of | |
288 | time. */ | |
289 | ||
290 | CHECK_TIMEOUT: | |
291 | if (transport_write_timeout > 0 && local_timeout <= 0) | |
292 | { | |
293 | errno = ETIMEDOUT; | |
294 | return FALSE; | |
295 | } | |
059ec3d9 PH |
296 | continue; |
297 | } | |
298 | ||
299 | /* Otherwise there's been an error */ | |
300 | ||
301 | DEBUG(D_transport) debug_printf("writing error %d: %s\n", save_errno, | |
302 | strerror(save_errno)); | |
303 | errno = save_errno; | |
304 | return FALSE; | |
305 | } | |
306 | ||
307 | /* We've tried and tried and tried but still failed */ | |
308 | ||
309 | errno = ERRNO_WRITEINCOMPLETE; | |
310 | return FALSE; | |
311 | } | |
312 | ||
313 | ||
314 | ||
315 | ||
316 | /************************************************* | |
317 | * Write formatted string * | |
318 | *************************************************/ | |
319 | ||
320 | /* This is called by various transports. It is a convenience function. | |
321 | ||
322 | Arguments: | |
323 | fd file descriptor | |
324 | format string format | |
325 | ... arguments for format | |
326 | ||
327 | Returns: the yield of transport_write_block() | |
328 | */ | |
329 | ||
330 | BOOL | |
1ba28e2b | 331 | transport_write_string(int fd, const char *format, ...) |
059ec3d9 PH |
332 | { |
333 | va_list ap; | |
334 | va_start(ap, format); | |
335 | if (!string_vformat(big_buffer, big_buffer_size, format, ap)) | |
336 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "overlong formatted string in transport"); | |
337 | va_end(ap); | |
338 | return transport_write_block(fd, big_buffer, Ustrlen(big_buffer)); | |
339 | } | |
340 | ||
341 | ||
342 | ||
343 | ||
344 | /************************************************* | |
345 | * Write character chunk * | |
346 | *************************************************/ | |
347 | ||
348 | /* Subroutine used by transport_write_message() to scan character chunks for | |
349 | newlines and act appropriately. The object is to minimise the number of writes. | |
350 | The output byte stream is buffered up in deliver_out_buffer, which is written | |
351 | only when it gets full, thus minimizing write operations and TCP packets. | |
352 | ||
353 | Static data is used to handle the case when the last character of the previous | |
354 | chunk was NL, or matched part of the data that has to be escaped. | |
355 | ||
356 | Arguments: | |
357 | fd file descript to write to | |
358 | chunk pointer to data to write | |
359 | len length of data to write | |
360 | usr_crlf TRUE if CR LF is wanted at the end of each line | |
361 | ||
362 | In addition, the static nl_xxx variables must be set as required. | |
363 | ||
364 | Returns: TRUE on success, FALSE on failure (with errno preserved) | |
365 | */ | |
366 | ||
367 | static BOOL | |
368 | write_chunk(int fd, uschar *chunk, int len, BOOL use_crlf) | |
369 | { | |
370 | uschar *start = chunk; | |
371 | uschar *end = chunk + len; | |
372 | register uschar *ptr; | |
373 | int mlen = DELIVER_OUT_BUFFER_SIZE - nl_escape_length - 2; | |
374 | ||
375 | /* The assumption is made that the check string will never stretch over move | |
376 | than one chunk since the only time there are partial matches is when copying | |
377 | the body in large buffers. There is always enough room in the buffer for an | |
378 | escape string, since the loop below ensures this for each character it | |
379 | processes, and it won't have stuck in the escape string if it left a partial | |
380 | match. */ | |
381 | ||
382 | if (nl_partial_match >= 0) | |
383 | { | |
384 | if (nl_check_length > 0 && len >= nl_check_length && | |
385 | Ustrncmp(start, nl_check + nl_partial_match, | |
386 | nl_check_length - nl_partial_match) == 0) | |
387 | { | |
388 | Ustrncpy(chunk_ptr, nl_escape, nl_escape_length); | |
389 | chunk_ptr += nl_escape_length; | |
390 | start += nl_check_length - nl_partial_match; | |
391 | } | |
392 | ||
393 | /* The partial match was a false one. Insert the characters carried over | |
394 | from the previous chunk. */ | |
395 | ||
396 | else if (nl_partial_match > 0) | |
397 | { | |
398 | Ustrncpy(chunk_ptr, nl_check, nl_partial_match); | |
399 | chunk_ptr += nl_partial_match; | |
400 | } | |
401 | ||
402 | nl_partial_match = -1; | |
403 | } | |
404 | ||
405 | /* Now process the characters in the chunk. Whenever we hit a newline we check | |
406 | for possible escaping. The code for the non-NL route should be as fast as | |
407 | possible. */ | |
408 | ||
409 | for (ptr = start; ptr < end; ptr++) | |
410 | { | |
411 | register int ch; | |
412 | ||
413 | /* Flush the buffer if it has reached the threshold - we want to leave enough | |
414 | room for the next uschar, plus a possible extra CR for an LF, plus the escape | |
415 | string. */ | |
416 | ||
417 | if (chunk_ptr - deliver_out_buffer > mlen) | |
418 | { | |
419 | if (!transport_write_block(fd, deliver_out_buffer, | |
420 | chunk_ptr - deliver_out_buffer)) | |
421 | return FALSE; | |
422 | chunk_ptr = deliver_out_buffer; | |
423 | } | |
424 | ||
425 | if ((ch = *ptr) == '\n') | |
426 | { | |
427 | int left = end - ptr - 1; /* count of chars left after NL */ | |
428 | ||
429 | /* Insert CR before NL if required */ | |
430 | ||
431 | if (use_crlf) *chunk_ptr++ = '\r'; | |
432 | *chunk_ptr++ = '\n'; | |
332f5cf3 | 433 | transport_newlines++; |
059ec3d9 PH |
434 | |
435 | /* The check_string test (formerly "from hack") replaces the specific | |
436 | string at the start of a line with an escape string (e.g. "From " becomes | |
437 | ">From " or "." becomes "..". It is a case-sensitive test. The length | |
438 | check above ensures there is always enough room to insert this string. */ | |
439 | ||
440 | if (nl_check_length > 0) | |
441 | { | |
442 | if (left >= nl_check_length && | |
443 | Ustrncmp(ptr+1, nl_check, nl_check_length) == 0) | |
444 | { | |
445 | Ustrncpy(chunk_ptr, nl_escape, nl_escape_length); | |
446 | chunk_ptr += nl_escape_length; | |
447 | ptr += nl_check_length; | |
448 | } | |
449 | ||
450 | /* Handle the case when there isn't enough left to match the whole | |
451 | check string, but there may be a partial match. We remember how many | |
452 | characters matched, and finish processing this chunk. */ | |
453 | ||
454 | else if (left <= 0) nl_partial_match = 0; | |
455 | ||
456 | else if (Ustrncmp(ptr+1, nl_check, left) == 0) | |
457 | { | |
458 | nl_partial_match = left; | |
459 | ptr = end; | |
460 | } | |
461 | } | |
462 | } | |
463 | ||
464 | /* Not a NL character */ | |
465 | ||
466 | else *chunk_ptr++ = ch; | |
467 | } | |
468 | ||
469 | return TRUE; | |
470 | } | |
471 | ||
472 | ||
473 | ||
474 | ||
475 | /************************************************* | |
476 | * Generate address for RCPT TO * | |
477 | *************************************************/ | |
478 | ||
479 | /* This function puts together an address for RCPT to, using the caseful | |
480 | version of the local part and the caseful version of the domain. If there is no | |
481 | prefix or suffix, or if affixes are to be retained, we can just use the | |
482 | original address. Otherwise, if there is a prefix but no suffix we can use a | |
483 | pointer into the original address. If there is a suffix, however, we have to | |
484 | build a new string. | |
485 | ||
486 | Arguments: | |
487 | addr the address item | |
488 | include_affixes TRUE if affixes are to be included | |
489 | ||
490 | Returns: a string | |
491 | */ | |
492 | ||
493 | uschar * | |
494 | transport_rcpt_address(address_item *addr, BOOL include_affixes) | |
495 | { | |
496 | uschar *at; | |
497 | int plen, slen; | |
498 | ||
499 | if (include_affixes) | |
500 | { | |
501 | setflag(addr, af_include_affixes); /* Affects logged => line */ | |
502 | return addr->address; | |
503 | } | |
504 | ||
505 | if (addr->suffix == NULL) | |
506 | { | |
507 | if (addr->prefix == NULL) return addr->address; | |
508 | return addr->address + Ustrlen(addr->prefix); | |
509 | } | |
510 | ||
511 | at = Ustrrchr(addr->address, '@'); | |
512 | plen = (addr->prefix == NULL)? 0 : Ustrlen(addr->prefix); | |
513 | slen = Ustrlen(addr->suffix); | |
514 | ||
515 | return string_sprintf("%.*s@%s", (at - addr->address - plen - slen), | |
516 | addr->address + plen, at + 1); | |
517 | } | |
518 | ||
519 | ||
520 | /************************************************* | |
521 | * Output Envelope-To: address & scan duplicates * | |
522 | *************************************************/ | |
523 | ||
524 | /* This function is called from internal_transport_write_message() below, when | |
525 | generating an Envelope-To: header line. It checks for duplicates of the given | |
526 | address and its ancestors. When one is found, this function calls itself | |
527 | recursively, to output the envelope address of the duplicate. | |
528 | ||
529 | We want to avoid duplication in the list, which can arise for example when | |
530 | A->B,C and then both B and C alias to D. This can also happen when there are | |
531 | unseen drivers in use. So a list of addresses that have been output is kept in | |
532 | the plist variable. | |
533 | ||
534 | It is also possible to have loops in the address ancestry/duplication graph, | |
535 | for example if there are two top level addresses A and B and we have A->B,C and | |
536 | B->A. To break the loop, we use a list of processed addresses in the dlist | |
537 | variable. | |
538 | ||
539 | After handling duplication, this function outputs the progenitor of the given | |
540 | address. | |
541 | ||
542 | Arguments: | |
543 | p the address we are interested in | |
544 | pplist address of anchor of the list of addresses not to output | |
545 | pdlist address of anchor of the list of processed addresses | |
546 | first TRUE if this is the first address; set it FALSE afterwards | |
547 | fd the file descriptor to write to | |
548 | use_crlf to be passed on to write_chunk() | |
549 | ||
550 | Returns: FALSE if writing failed | |
551 | */ | |
552 | ||
553 | static BOOL | |
554 | write_env_to(address_item *p, struct aci **pplist, struct aci **pdlist, | |
555 | BOOL *first, int fd, BOOL use_crlf) | |
556 | { | |
557 | address_item *pp; | |
558 | struct aci *ppp; | |
559 | ||
560 | /* Do nothing if we have already handled this address. If not, remember it | |
561 | so that we don't handle it again. */ | |
562 | ||
563 | for (ppp = *pdlist; ppp != NULL; ppp = ppp->next) | |
564 | { if (p == ppp->ptr) return TRUE; } | |
565 | ||
566 | ppp = store_get(sizeof(struct aci)); | |
567 | ppp->next = *pdlist; | |
568 | *pdlist = ppp; | |
569 | ppp->ptr = p; | |
570 | ||
571 | /* Now scan up the ancestry, checking for duplicates at each generation. */ | |
572 | ||
573 | for (pp = p;; pp = pp->parent) | |
574 | { | |
575 | address_item *dup; | |
576 | for (dup = addr_duplicate; dup != NULL; dup = dup->next) | |
577 | { | |
578 | if (dup->dupof != pp) continue; /* Not a dup of our address */ | |
579 | if (!write_env_to(dup, pplist, pdlist, first, fd, use_crlf)) return FALSE; | |
580 | } | |
581 | if (pp->parent == NULL) break; | |
582 | } | |
583 | ||
584 | /* Check to see if we have already output the progenitor. */ | |
585 | ||
586 | for (ppp = *pplist; ppp != NULL; ppp = ppp->next) | |
587 | { if (pp == ppp->ptr) break; } | |
588 | if (ppp != NULL) return TRUE; | |
589 | ||
590 | /* Remember what we have output, and output it. */ | |
591 | ||
592 | ppp = store_get(sizeof(struct aci)); | |
593 | ppp->next = *pplist; | |
594 | *pplist = ppp; | |
595 | ppp->ptr = pp; | |
596 | ||
597 | if (!(*first) && !write_chunk(fd, US",\n ", 3, use_crlf)) return FALSE; | |
598 | *first = FALSE; | |
599 | return write_chunk(fd, pp->address, Ustrlen(pp->address), use_crlf); | |
600 | } | |
601 | ||
602 | ||
603 | ||
604 | ||
511a6c14 JH |
605 | /* Add/remove/rewwrite headers, and send them plus the empty-line sparator. |
606 | ||
607 | Globals: | |
608 | header_list | |
609 | ||
610 | Arguments: | |
611 | addr (chain of) addresses (for extra headers), or NULL; | |
612 | only the first address is used | |
613 | fd file descriptor to write the message to | |
614 | sendfn function for output | |
615 | use_crlf turn NL into CR LF | |
616 | rewrite_rules chain of header rewriting rules | |
617 | rewrite_existflags flags for the rewriting rules | |
618 | ||
619 | Returns: TRUE on success; FALSE on failure. | |
620 | */ | |
621 | BOOL | |
622 | transport_headers_send(address_item *addr, int fd, uschar *add_headers, uschar *remove_headers, | |
623 | BOOL (*sendfn)(int fd, uschar * s, int len, BOOL use_crlf), | |
624 | BOOL use_crlf, rewrite_rule *rewrite_rules, int rewrite_existflags) | |
625 | { | |
626 | header_line *h; | |
627 | ||
628 | /* Then the message's headers. Don't write any that are flagged as "old"; | |
629 | that means they were rewritten, or are a record of envelope rewriting, or | |
630 | were removed (e.g. Bcc). If remove_headers is not null, skip any headers that | |
76146973 JH |
631 | match any entries therein. It is a colon-sep list; expand the items |
632 | separately and squash any empty ones. | |
d43cbe25 | 633 | Then check addr->prop.remove_headers too, provided that addr is not NULL. */ |
511a6c14 JH |
634 | |
635 | for (h = header_list; h != NULL; h = h->next) if (h->type != htype_old) | |
636 | { | |
637 | int i; | |
55414b25 | 638 | const uschar *list = remove_headers; |
511a6c14 JH |
639 | |
640 | BOOL include_header = TRUE; | |
641 | ||
d43cbe25 | 642 | for (i = 0; i < 2; i++) /* For remove_headers && addr->prop.remove_headers */ |
511a6c14 JH |
643 | { |
644 | if (list) | |
645 | { | |
646 | int sep = ':'; /* This is specified as a colon-separated list */ | |
647 | uschar *s, *ss; | |
8bc732e8 | 648 | while ((s = string_nextinlist(&list, &sep, NULL, 0))) |
511a6c14 | 649 | { |
76146973 JH |
650 | int len; |
651 | ||
652 | if (i == 0) | |
653 | if (!(s = expand_string(s)) && !expand_string_forcedfail) | |
654 | { | |
655 | errno = ERRNO_CHHEADER_FAIL; | |
656 | return FALSE; | |
657 | } | |
658 | len = Ustrlen(s); | |
511a6c14 JH |
659 | if (strncmpic(h->text, s, len) != 0) continue; |
660 | ss = h->text + len; | |
661 | while (*ss == ' ' || *ss == '\t') ss++; | |
662 | if (*ss == ':') break; | |
663 | } | |
664 | if (s != NULL) { include_header = FALSE; break; } | |
665 | } | |
d43cbe25 | 666 | if (addr != NULL) list = addr->prop.remove_headers; |
511a6c14 JH |
667 | } |
668 | ||
669 | /* If this header is to be output, try to rewrite it if there are rewriting | |
670 | rules. */ | |
671 | ||
672 | if (include_header) | |
673 | { | |
674 | if (rewrite_rules) | |
675 | { | |
676 | void *reset_point = store_get(0); | |
677 | header_line *hh; | |
678 | ||
679 | if ((hh = rewrite_header(h, NULL, NULL, rewrite_rules, rewrite_existflags, FALSE))) | |
680 | { | |
681 | if (!sendfn(fd, hh->text, hh->slen, use_crlf)) return FALSE; | |
682 | store_reset(reset_point); | |
683 | continue; /* With the next header line */ | |
684 | } | |
685 | } | |
686 | ||
687 | /* Either no rewriting rules, or it didn't get rewritten */ | |
688 | ||
689 | if (!sendfn(fd, h->text, h->slen, use_crlf)) return FALSE; | |
690 | } | |
691 | ||
692 | /* Header removed */ | |
693 | ||
694 | else | |
695 | { | |
696 | DEBUG(D_transport) debug_printf("removed header line:\n%s---\n", h->text); | |
697 | } | |
698 | } | |
699 | ||
700 | /* Add on any address-specific headers. If there are multiple addresses, | |
701 | they will all have the same headers in order to be batched. The headers | |
702 | are chained in reverse order of adding (so several addresses from the | |
703 | same alias might share some of them) but we want to output them in the | |
704 | opposite order. This is a bit tedious, but there shouldn't be very many | |
705 | of them. We just walk the list twice, reversing the pointers each time, | |
706 | but on the second time, write out the items. | |
707 | ||
708 | Headers added to an address by a router are guaranteed to end with a newline. | |
709 | */ | |
710 | ||
711 | if (addr) | |
712 | { | |
713 | int i; | |
d43cbe25 | 714 | header_line *hprev = addr->prop.extra_headers; |
511a6c14 JH |
715 | header_line *hnext; |
716 | for (i = 0; i < 2; i++) | |
717 | { | |
718 | for (h = hprev, hprev = NULL; h != NULL; h = hnext) | |
719 | { | |
720 | hnext = h->next; | |
721 | h->next = hprev; | |
722 | hprev = h; | |
723 | if (i == 1) | |
724 | { | |
725 | if (!sendfn(fd, h->text, h->slen, use_crlf)) return FALSE; | |
726 | DEBUG(D_transport) | |
727 | debug_printf("added header line(s):\n%s---\n", h->text); | |
728 | } | |
729 | } | |
730 | } | |
731 | } | |
732 | ||
76146973 JH |
733 | /* If a string containing additional headers exists it is a newline-sep |
734 | list. Expand each item and write out the result. This is done last so that | |
735 | if it (deliberately or accidentally) isn't in header format, it won't mess | |
736 | up any other headers. An empty string or a forced expansion failure are | |
737 | noops. An added header string from a transport may not end with a newline; | |
738 | add one if it does not. */ | |
511a6c14 JH |
739 | |
740 | if (add_headers) | |
741 | { | |
76146973 JH |
742 | int sep = '\n'; |
743 | uschar * s; | |
744 | ||
55414b25 | 745 | while ((s = string_nextinlist(CUSS &add_headers, &sep, NULL, 0))) |
76146973 | 746 | if (!(s = expand_string(s))) |
511a6c14 | 747 | { |
76146973 JH |
748 | if (!expand_string_forcedfail) |
749 | { errno = ERRNO_CHHEADER_FAIL; return FALSE; } | |
750 | } | |
751 | else | |
752 | { | |
753 | int len = Ustrlen(s); | |
754 | if (len > 0) | |
511a6c14 | 755 | { |
76146973 JH |
756 | if (!sendfn(fd, s, len, use_crlf)) return FALSE; |
757 | if (s[len-1] != '\n' && !sendfn(fd, US"\n", 1, use_crlf)) | |
758 | return FALSE; | |
759 | DEBUG(D_transport) | |
760 | { | |
761 | debug_printf("added header line:\n%s", s); | |
762 | if (s[len-1] != '\n') debug_printf("\n"); | |
763 | debug_printf("---\n"); | |
764 | } | |
511a6c14 JH |
765 | } |
766 | } | |
511a6c14 JH |
767 | } |
768 | ||
769 | /* Separate headers from body with a blank line */ | |
770 | ||
771 | return sendfn(fd, US"\n", 1, use_crlf); | |
772 | } | |
773 | ||
774 | ||
059ec3d9 PH |
775 | /************************************************* |
776 | * Write the message * | |
777 | *************************************************/ | |
778 | ||
779 | /* This function writes the message to the given file descriptor. The headers | |
780 | are in the in-store data structure, and the rest of the message is in the open | |
781 | file descriptor deliver_datafile. Make sure we start it at the beginning. | |
782 | ||
783 | . If add_return_path is TRUE, a "return-path:" header is added to the message, | |
784 | containing the envelope sender's address. | |
785 | ||
786 | . If add_envelope_to is TRUE, a "envelope-to:" header is added to the message, | |
787 | giving the top-level envelope address that caused this delivery to happen. | |
788 | ||
789 | . If add_delivery_date is TRUE, a "delivery-date:" header is added to the | |
790 | message. It gives the time and date that delivery took place. | |
791 | ||
792 | . If check_string is not null, the start of each line is checked for that | |
793 | string. If it is found, it is replaced by escape_string. This used to be | |
794 | the "from hack" for files, and "smtp_dots" for escaping SMTP dots. | |
795 | ||
796 | . If use_crlf is true, newlines are turned into CRLF (SMTP output). | |
797 | ||
798 | The yield is TRUE if all went well, and FALSE if not. Exit *immediately* after | |
799 | any writing or reading error, leaving the code in errno intact. Error exits | |
800 | can include timeouts for certain transports, which are requested by setting | |
801 | transport_write_timeout non-zero. | |
802 | ||
803 | Arguments: | |
804 | addr (chain of) addresses (for extra headers), or NULL; | |
805 | only the first address is used | |
806 | fd file descriptor to write the message to | |
807 | options bit-wise options: | |
808 | add_return_path if TRUE, add a "return-path" header | |
809 | add_envelope_to if TRUE, add a "envelope-to" header | |
810 | add_delivery_date if TRUE, add a "delivery-date" header | |
811 | use_crlf if TRUE, turn NL into CR LF | |
812 | end_dot if TRUE, send a terminating "." line at the end | |
813 | no_headers if TRUE, omit the headers | |
814 | no_body if TRUE, omit the body | |
815 | size_limit if > 0, this is a limit to the size of message written; | |
816 | it is used when returning messages to their senders, | |
817 | and is approximate rather than exact, owing to chunk | |
818 | buffering | |
819 | add_headers a string containing one or more headers to add; it is | |
820 | expanded, and must be in correct RFC 822 format as | |
821 | it is transmitted verbatim; NULL => no additions, | |
822 | and so does empty string or forced expansion fail | |
823 | remove_headers a colon-separated list of headers to remove, or NULL | |
824 | check_string a string to check for at the start of lines, or NULL | |
825 | escape_string a string to insert in front of any check string | |
826 | rewrite_rules chain of header rewriting rules | |
827 | rewrite_existflags flags for the rewriting rules | |
828 | ||
829 | Returns: TRUE on success; FALSE (with errno) on failure. | |
830 | In addition, the global variable transport_count | |
831 | is incremented by the number of bytes written. | |
832 | */ | |
833 | ||
834 | static BOOL | |
835 | internal_transport_write_message(address_item *addr, int fd, int options, | |
836 | int size_limit, uschar *add_headers, uschar *remove_headers, uschar *check_string, | |
837 | uschar *escape_string, rewrite_rule *rewrite_rules, int rewrite_existflags) | |
838 | { | |
839 | int written = 0; | |
840 | int len; | |
059ec3d9 PH |
841 | BOOL use_crlf = (options & topt_use_crlf) != 0; |
842 | ||
843 | /* Initialize pointer in output buffer. */ | |
844 | ||
845 | chunk_ptr = deliver_out_buffer; | |
846 | ||
847 | /* Set up the data for start-of-line data checking and escaping */ | |
848 | ||
849 | nl_partial_match = -1; | |
850 | if (check_string != NULL && escape_string != NULL) | |
851 | { | |
852 | nl_check = check_string; | |
853 | nl_check_length = Ustrlen(nl_check); | |
854 | nl_escape = escape_string; | |
855 | nl_escape_length = Ustrlen(nl_escape); | |
856 | } | |
857 | else nl_check_length = nl_escape_length = 0; | |
858 | ||
859 | /* Whether the escaping mechanism is applied to headers or not is controlled by | |
860 | an option (set for SMTP, not otherwise). Negate the length if not wanted till | |
861 | after the headers. */ | |
862 | ||
863 | if ((options & topt_escape_headers) == 0) nl_check_length = -nl_check_length; | |
864 | ||
865 | /* Write the headers if required, including any that have to be added. If there | |
866 | are header rewriting rules, apply them. */ | |
867 | ||
868 | if ((options & topt_no_headers) == 0) | |
869 | { | |
870 | /* Add return-path: if requested. */ | |
871 | ||
872 | if ((options & topt_add_return_path) != 0) | |
873 | { | |
874 | uschar buffer[ADDRESS_MAXLENGTH + 20]; | |
875 | sprintf(CS buffer, "Return-path: <%.*s>\n", ADDRESS_MAXLENGTH, | |
876 | return_path); | |
877 | if (!write_chunk(fd, buffer, Ustrlen(buffer), use_crlf)) return FALSE; | |
878 | } | |
879 | ||
880 | /* Add envelope-to: if requested */ | |
881 | ||
882 | if ((options & topt_add_envelope_to) != 0) | |
883 | { | |
884 | BOOL first = TRUE; | |
885 | address_item *p; | |
886 | struct aci *plist = NULL; | |
887 | struct aci *dlist = NULL; | |
888 | void *reset_point = store_get(0); | |
889 | ||
890 | if (!write_chunk(fd, US"Envelope-to: ", 13, use_crlf)) return FALSE; | |
891 | ||
892 | /* Pick up from all the addresses. The plist and dlist variables are | |
893 | anchors for lists of addresses already handled; they have to be defined at | |
894 | this level becuase write_env_to() calls itself recursively. */ | |
895 | ||
896 | for (p = addr; p != NULL; p = p->next) | |
897 | { | |
898 | if (!write_env_to(p, &plist, &dlist, &first, fd, use_crlf)) return FALSE; | |
899 | } | |
900 | ||
901 | /* Add a final newline and reset the store used for tracking duplicates */ | |
902 | ||
903 | if (!write_chunk(fd, US"\n", 1, use_crlf)) return FALSE; | |
904 | store_reset(reset_point); | |
905 | } | |
906 | ||
907 | /* Add delivery-date: if requested. */ | |
908 | ||
909 | if ((options & topt_add_delivery_date) != 0) | |
910 | { | |
911 | uschar buffer[100]; | |
912 | sprintf(CS buffer, "Delivery-date: %s\n", tod_stamp(tod_full)); | |
913 | if (!write_chunk(fd, buffer, Ustrlen(buffer), use_crlf)) return FALSE; | |
914 | } | |
915 | ||
916 | /* Then the message's headers. Don't write any that are flagged as "old"; | |
917 | that means they were rewritten, or are a record of envelope rewriting, or | |
918 | were removed (e.g. Bcc). If remove_headers is not null, skip any headers that | |
d43cbe25 | 919 | match any entries therein. Then check addr->prop.remove_headers too, provided that |
059ec3d9 | 920 | addr is not NULL. */ |
511a6c14 JH |
921 | if (!transport_headers_send(addr, fd, add_headers, remove_headers, &write_chunk, |
922 | use_crlf, rewrite_rules, rewrite_existflags)) | |
923 | return FALSE; | |
059ec3d9 PH |
924 | } |
925 | ||
926 | /* If the body is required, ensure that the data for check strings (formerly | |
927 | the "from hack") is enabled by negating the length if necessary. (It will be | |
928 | negative in cases where it isn't to apply to the headers). Then ensure the body | |
929 | is positioned at the start of its file (following the message id), then write | |
930 | it, applying the size limit if required. */ | |
931 | ||
932 | if ((options & topt_no_body) == 0) | |
933 | { | |
934 | nl_check_length = abs(nl_check_length); | |
935 | nl_partial_match = 0; | |
936 | lseek(deliver_datafile, SPOOL_DATA_START_OFFSET, SEEK_SET); | |
937 | while ((len = read(deliver_datafile, deliver_in_buffer, | |
938 | DELIVER_IN_BUFFER_SIZE)) > 0) | |
939 | { | |
940 | if (!write_chunk(fd, deliver_in_buffer, len, use_crlf)) return FALSE; | |
941 | if (size_limit > 0) | |
942 | { | |
943 | written += len; | |
944 | if (written > size_limit) | |
945 | { | |
946 | len = 0; /* Pretend EOF */ | |
947 | break; | |
948 | } | |
949 | } | |
950 | } | |
951 | ||
059ec3d9 PH |
952 | /* A read error on the body will have left len == -1 and errno set. */ |
953 | ||
954 | if (len != 0) return FALSE; | |
c0940526 | 955 | } |
059ec3d9 | 956 | |
c0940526 | 957 | /* Finished with the check string */ |
059ec3d9 | 958 | |
c0940526 PP |
959 | nl_check_length = nl_escape_length = 0; |
960 | ||
961 | /* If requested, add a terminating "." line (SMTP output). */ | |
962 | ||
963 | if ((options & topt_end_dot) != 0 && !write_chunk(fd, US".\n", 2, use_crlf)) | |
964 | return FALSE; | |
059ec3d9 PH |
965 | |
966 | /* Write out any remaining data in the buffer before returning. */ | |
967 | ||
968 | return (len = chunk_ptr - deliver_out_buffer) <= 0 || | |
969 | transport_write_block(fd, deliver_out_buffer, len); | |
970 | } | |
971 | ||
972 | ||
80a47a2c | 973 | #ifndef DISABLE_DKIM |
fb2274d4 | 974 | |
4cd12fe9 TK |
975 | /*************************************************************************************************** |
976 | * External interface to write the message, while signing it with DKIM and/or Domainkeys * | |
977 | ***************************************************************************************************/ | |
fb2274d4 | 978 | |
077ba943 JH |
979 | /* This function is a wrapper around transport_write_message(). |
980 | It is only called from the smtp transport if DKIM or Domainkeys support | |
981 | is compiled in. The function sets up a replacement fd into a -K file, | |
982 | then calls the normal function. This way, the exact bits that exim would | |
983 | have put "on the wire" will end up in the file (except for TLS | |
984 | encapsulation, which is the very very last thing). When we are done | |
985 | signing the file, send the signed message down the original fd (or TLS fd). | |
986 | ||
987 | Arguments: | |
988 | as for internal_transport_write_message() above, with additional arguments: | |
989 | uschar *dkim_private_key DKIM: The private key to use (filename or | |
990 | plain data) | |
991 | uschar *dkim_domain DKIM: The domain to use | |
992 | uschar *dkim_selector DKIM: The selector to use. | |
993 | uschar *dkim_canon DKIM: The canonalization scheme to use, | |
994 | "simple" or "relaxed" | |
995 | uschar *dkim_strict DKIM: What to do if signing fails: | |
996 | 1/true => throw error | |
997 | 0/false => send anyway | |
998 | uschar *dkim_sign_headers DKIM: List of headers that should be included | |
999 | in signature generation | |
f7572e5a TK |
1000 | |
1001 | Returns: TRUE on success; FALSE (with errno) for any failure | |
1002 | */ | |
1003 | ||
1004 | BOOL | |
1005 | dkim_transport_write_message(address_item *addr, int fd, int options, | |
1006 | int size_limit, uschar *add_headers, uschar *remove_headers, | |
1007 | uschar *check_string, uschar *escape_string, rewrite_rule *rewrite_rules, | |
1008 | int rewrite_existflags, uschar *dkim_private_key, uschar *dkim_domain, | |
80a47a2c | 1009 | uschar *dkim_selector, uschar *dkim_canon, uschar *dkim_strict, uschar *dkim_sign_headers |
4cd12fe9 | 1010 | ) |
f7572e5a | 1011 | { |
077ba943 JH |
1012 | int dkim_fd; |
1013 | int save_errno = 0; | |
1014 | BOOL rc; | |
1015 | uschar dkim_spool_name[256]; | |
1016 | char sbuf[2048]; | |
1017 | int sread = 0; | |
1018 | int wwritten = 0; | |
1019 | uschar *dkim_signature = NULL; | |
077ba943 JH |
1020 | |
1021 | /* If we can't sign, just call the original function. */ | |
1022 | ||
1023 | if (!(dkim_private_key && dkim_domain && dkim_selector)) | |
1024 | return transport_write_message(addr, fd, options, | |
1025 | size_limit, add_headers, remove_headers, | |
1026 | check_string, escape_string, rewrite_rules, | |
1027 | rewrite_existflags); | |
1028 | ||
1029 | (void)string_format(dkim_spool_name, 256, "%s/input/%s/%s-%d-K", | |
1030 | spool_directory, message_subdir, message_id, (int)getpid()); | |
1031 | ||
1032 | if ((dkim_fd = Uopen(dkim_spool_name, O_RDWR|O_CREAT|O_TRUNC, SPOOL_MODE)) < 0) | |
1033 | { | |
1034 | /* Can't create spool file. Ugh. */ | |
1035 | rc = FALSE; | |
1036 | save_errno = errno; | |
1037 | goto CLEANUP; | |
4cd12fe9 TK |
1038 | } |
1039 | ||
077ba943 | 1040 | /* Call original function to write the -K file */ |
f7572e5a | 1041 | |
077ba943 JH |
1042 | rc = transport_write_message(addr, dkim_fd, options, |
1043 | size_limit, add_headers, remove_headers, | |
1044 | check_string, escape_string, rewrite_rules, | |
1045 | rewrite_existflags); | |
f7572e5a | 1046 | |
077ba943 JH |
1047 | /* Save error state. We must clean up before returning. */ |
1048 | if (!rc) | |
1049 | { | |
1050 | save_errno = errno; | |
1051 | goto CLEANUP; | |
1052 | } | |
f7572e5a | 1053 | |
077ba943 JH |
1054 | if (dkim_private_key && dkim_domain && dkim_selector) |
1055 | { | |
1056 | /* Rewind file and feed it to the goats^W DKIM lib */ | |
1057 | lseek(dkim_fd, 0, SEEK_SET); | |
1058 | dkim_signature = dkim_exim_sign(dkim_fd, | |
1059 | dkim_private_key, | |
1060 | dkim_domain, | |
1061 | dkim_selector, | |
1062 | dkim_canon, | |
1063 | dkim_sign_headers); | |
1064 | if (!dkim_signature) | |
1065 | { | |
1066 | if (dkim_strict) | |
1067 | { | |
1068 | uschar *dkim_strict_result = expand_string(dkim_strict); | |
1069 | if (dkim_strict_result) | |
1070 | if ( (strcmpic(dkim_strict,US"1") == 0) || | |
94431adb | 1071 | (strcmpic(dkim_strict,US"true") == 0) ) |
077ba943 JH |
1072 | { |
1073 | /* Set errno to something halfway meaningful */ | |
1074 | save_errno = EACCES; | |
1075 | log_write(0, LOG_MAIN, "DKIM: message could not be signed," | |
1076 | " and dkim_strict is set. Deferring message delivery."); | |
1077 | rc = FALSE; | |
1078 | goto CLEANUP; | |
1079 | } | |
f7572e5a TK |
1080 | } |
1081 | } | |
077ba943 JH |
1082 | else |
1083 | { | |
1084 | int siglen = Ustrlen(dkim_signature); | |
1085 | while(siglen > 0) | |
1086 | { | |
1087 | #ifdef SUPPORT_TLS | |
1088 | wwritten = tls_out.active == fd | |
1089 | ? tls_write(FALSE, dkim_signature, siglen) | |
1090 | : write(fd, dkim_signature, siglen); | |
1091 | #else | |
1092 | wwritten = write(fd, dkim_signature, siglen); | |
1093 | #endif | |
1094 | if (wwritten == -1) | |
1095 | { | |
1096 | /* error, bail out */ | |
1097 | save_errno = errno; | |
1098 | rc = FALSE; | |
1099 | goto CLEANUP; | |
1100 | } | |
1101 | siglen -= wwritten; | |
1102 | dkim_signature += wwritten; | |
f7572e5a TK |
1103 | } |
1104 | } | |
4cd12fe9 | 1105 | } |
f7572e5a | 1106 | |
f7572e5a | 1107 | #ifdef HAVE_LINUX_SENDFILE |
077ba943 JH |
1108 | /* We can use sendfile() to shove the file contents |
1109 | to the socket. However only if we don't use TLS, | |
1110 | as then there's another layer of indirection | |
1111 | before the data finally hits the socket. */ | |
1112 | if (tls_out.active != fd) | |
1113 | { | |
e8bc7fca | 1114 | off_t size = lseek(dkim_fd, 0, SEEK_END); /* Fetch file size */ |
077ba943 JH |
1115 | ssize_t copied = 0; |
1116 | off_t offset = 0; | |
e8bc7fca JH |
1117 | |
1118 | /* Rewind file */ | |
1119 | lseek(dkim_fd, 0, SEEK_SET); | |
1120 | ||
077ba943 JH |
1121 | while(copied >= 0 && offset < size) |
1122 | copied = sendfile(fd, dkim_fd, &offset, size - offset); | |
1123 | if (copied < 0) | |
f7572e5a | 1124 | { |
077ba943 JH |
1125 | save_errno = errno; |
1126 | rc = FALSE; | |
f7572e5a | 1127 | } |
077ba943 | 1128 | } |
e8bc7fca JH |
1129 | else |
1130 | ||
f7572e5a TK |
1131 | #endif |
1132 | ||
077ba943 | 1133 | { |
e8bc7fca JH |
1134 | /* Rewind file */ |
1135 | lseek(dkim_fd, 0, SEEK_SET); | |
077ba943 | 1136 | |
e8bc7fca JH |
1137 | /* Send file down the original fd */ |
1138 | while((sread = read(dkim_fd, sbuf, 2048)) > 0) | |
f7572e5a | 1139 | { |
e8bc7fca JH |
1140 | char *p = sbuf; |
1141 | /* write the chunk */ | |
1142 | ||
1143 | while (sread) | |
1144 | { | |
077ba943 | 1145 | #ifdef SUPPORT_TLS |
e8bc7fca JH |
1146 | wwritten = tls_out.active == fd |
1147 | ? tls_write(FALSE, US p, sread) | |
1148 | : write(fd, p, sread); | |
077ba943 | 1149 | #else |
e8bc7fca | 1150 | wwritten = write(fd, p, sread); |
077ba943 | 1151 | #endif |
e8bc7fca JH |
1152 | if (wwritten == -1) |
1153 | { | |
1154 | /* error, bail out */ | |
1155 | save_errno = errno; | |
1156 | rc = FALSE; | |
1157 | goto CLEANUP; | |
1158 | } | |
1159 | p += wwritten; | |
1160 | sread -= wwritten; | |
f7572e5a | 1161 | } |
f7572e5a TK |
1162 | } |
1163 | ||
e8bc7fca JH |
1164 | if (sread == -1) |
1165 | { | |
1166 | save_errno = errno; | |
1167 | rc = FALSE; | |
1168 | } | |
077ba943 | 1169 | } |
f7572e5a | 1170 | |
077ba943 JH |
1171 | CLEANUP: |
1172 | /* unlink -K file */ | |
1173 | (void)close(dkim_fd); | |
1174 | Uunlink(dkim_spool_name); | |
1175 | errno = save_errno; | |
1176 | return rc; | |
f7572e5a | 1177 | } |
80a47a2c | 1178 | |
f7572e5a TK |
1179 | #endif |
1180 | ||
1181 | ||
1182 | ||
059ec3d9 PH |
1183 | /************************************************* |
1184 | * External interface to write the message * | |
1185 | *************************************************/ | |
1186 | ||
1187 | /* If there is no filtering required, call the internal function above to do | |
1188 | the real work, passing over all the arguments from this function. Otherwise, | |
1189 | set up a filtering process, fork another process to call the internal function | |
1190 | to write to the filter, and in this process just suck from the filter and write | |
1191 | down the given fd. At the end, tidy up the pipes and the processes. | |
1192 | ||
1193 | Arguments: as for internal_transport_write_message() above | |
1194 | ||
1195 | Returns: TRUE on success; FALSE (with errno) for any failure | |
1196 | transport_count is incremented by the number of bytes written | |
1197 | */ | |
1198 | ||
1199 | BOOL | |
1200 | transport_write_message(address_item *addr, int fd, int options, | |
1201 | int size_limit, uschar *add_headers, uschar *remove_headers, | |
1202 | uschar *check_string, uschar *escape_string, rewrite_rule *rewrite_rules, | |
1203 | int rewrite_existflags) | |
1204 | { | |
1205 | BOOL use_crlf; | |
1206 | BOOL last_filter_was_NL = TRUE; | |
1207 | int rc, len, yield, fd_read, fd_write, save_errno; | |
1208 | int pfd[2]; | |
1209 | pid_t filter_pid, write_pid; | |
1210 | ||
2e2a30b4 PH |
1211 | transport_filter_timed_out = FALSE; |
1212 | ||
059ec3d9 PH |
1213 | /* If there is no filter command set up, call the internal function that does |
1214 | the actual work, passing it the incoming fd, and return its result. */ | |
1215 | ||
6ff55e50 JH |
1216 | if ( !transport_filter_argv |
1217 | || !*transport_filter_argv | |
1218 | || !**transport_filter_argv | |
1219 | ) | |
059ec3d9 PH |
1220 | return internal_transport_write_message(addr, fd, options, size_limit, |
1221 | add_headers, remove_headers, check_string, escape_string, | |
1222 | rewrite_rules, rewrite_existflags); | |
1223 | ||
1224 | /* Otherwise the message must be written to a filter process and read back | |
1225 | before being written to the incoming fd. First set up the special processing to | |
1226 | be done during the copying. */ | |
1227 | ||
1228 | use_crlf = (options & topt_use_crlf) != 0; | |
1229 | nl_partial_match = -1; | |
1230 | ||
1231 | if (check_string != NULL && escape_string != NULL) | |
1232 | { | |
1233 | nl_check = check_string; | |
1234 | nl_check_length = Ustrlen(nl_check); | |
1235 | nl_escape = escape_string; | |
1236 | nl_escape_length = Ustrlen(nl_escape); | |
1237 | } | |
1238 | else nl_check_length = nl_escape_length = 0; | |
1239 | ||
1240 | /* Start up a subprocess to run the command. Ensure that our main fd will | |
1241 | be closed when the subprocess execs, but remove the flag afterwards. | |
1242 | (Otherwise, if this is a TCP/IP socket, it can't get passed on to another | |
1243 | process to deliver another message.) We get back stdin/stdout file descriptors. | |
1244 | If the process creation failed, give an error return. */ | |
1245 | ||
1246 | fd_read = -1; | |
1247 | fd_write = -1; | |
1248 | save_errno = 0; | |
1249 | yield = FALSE; | |
1250 | write_pid = (pid_t)(-1); | |
1251 | ||
ff790e47 | 1252 | (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC); |
55414b25 JH |
1253 | filter_pid = child_open(USS transport_filter_argv, NULL, 077, |
1254 | &fd_write, &fd_read, FALSE); | |
ff790e47 | 1255 | (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) & ~FD_CLOEXEC); |
059ec3d9 PH |
1256 | if (filter_pid < 0) goto TIDY_UP; /* errno set */ |
1257 | ||
1258 | DEBUG(D_transport) | |
1259 | debug_printf("process %d running as transport filter: write=%d read=%d\n", | |
1260 | (int)filter_pid, fd_write, fd_read); | |
1261 | ||
1262 | /* Fork subprocess to write the message to the filter, and return the result | |
1263 | via a(nother) pipe. While writing to the filter, we do not do the CRLF, | |
1264 | smtp dots, or check string processing. */ | |
1265 | ||
1266 | if (pipe(pfd) != 0) goto TIDY_UP; /* errno set */ | |
1267 | if ((write_pid = fork()) == 0) | |
1268 | { | |
1269 | BOOL rc; | |
f1e894f3 PH |
1270 | (void)close(fd_read); |
1271 | (void)close(pfd[pipe_read]); | |
059ec3d9 PH |
1272 | nl_check_length = nl_escape_length = 0; |
1273 | rc = internal_transport_write_message(addr, fd_write, | |
1274 | (options & ~(topt_use_crlf | topt_end_dot)), | |
1275 | size_limit, add_headers, remove_headers, NULL, NULL, | |
1276 | rewrite_rules, rewrite_existflags); | |
1277 | save_errno = errno; | |
1ac6b2e7 JH |
1278 | if ( write(pfd[pipe_write], (void *)&rc, sizeof(BOOL)) |
1279 | != sizeof(BOOL) | |
1280 | || write(pfd[pipe_write], (void *)&save_errno, sizeof(int)) | |
1281 | != sizeof(int) | |
1282 | || write(pfd[pipe_write], (void *)&(addr->more_errno), sizeof(int)) | |
1283 | != sizeof(int) | |
1284 | ) | |
1285 | rc = FALSE; /* compiler quietening */ | |
059ec3d9 PH |
1286 | _exit(0); |
1287 | } | |
1288 | save_errno = errno; | |
1289 | ||
1290 | /* Parent process: close our copy of the writing subprocess' pipes. */ | |
1291 | ||
f1e894f3 PH |
1292 | (void)close(pfd[pipe_write]); |
1293 | (void)close(fd_write); | |
059ec3d9 PH |
1294 | fd_write = -1; |
1295 | ||
1296 | /* Writing process creation failed */ | |
1297 | ||
1298 | if (write_pid < 0) | |
1299 | { | |
1300 | errno = save_errno; /* restore */ | |
1301 | goto TIDY_UP; | |
1302 | } | |
1303 | ||
1304 | /* When testing, let the subprocess get going */ | |
1305 | ||
1306 | if (running_in_test_harness) millisleep(250); | |
1307 | ||
1308 | DEBUG(D_transport) | |
1309 | debug_printf("process %d writing to transport filter\n", (int)write_pid); | |
1310 | ||
1311 | /* Copy the message from the filter to the output fd. A read error leaves len | |
1312 | == -1 and errno set. We need to apply a timeout to the read, to cope with | |
1313 | the case when the filter gets stuck, but it can be quite a long one. The | |
1314 | default is 5m, but this is now configurable. */ | |
1315 | ||
1316 | DEBUG(D_transport) debug_printf("copying from the filter\n"); | |
1317 | ||
1318 | /* Copy the output of the filter, remembering if the last character was NL. If | |
1319 | no data is returned, that counts as "ended with NL" (default setting of the | |
1320 | variable is TRUE). */ | |
1321 | ||
1322 | chunk_ptr = deliver_out_buffer; | |
1323 | ||
1324 | for (;;) | |
1325 | { | |
1326 | sigalrm_seen = FALSE; | |
1327 | alarm(transport_filter_timeout); | |
1328 | len = read(fd_read, deliver_in_buffer, DELIVER_IN_BUFFER_SIZE); | |
1329 | alarm(0); | |
1330 | if (sigalrm_seen) | |
1331 | { | |
1332 | errno = ETIMEDOUT; | |
2e2a30b4 | 1333 | transport_filter_timed_out = TRUE; |
059ec3d9 PH |
1334 | goto TIDY_UP; |
1335 | } | |
1336 | ||
1337 | /* If the read was successful, write the block down the original fd, | |
1338 | remembering whether it ends in \n or not. */ | |
1339 | ||
1340 | if (len > 0) | |
1341 | { | |
1342 | if (!write_chunk(fd, deliver_in_buffer, len, use_crlf)) goto TIDY_UP; | |
1343 | last_filter_was_NL = (deliver_in_buffer[len-1] == '\n'); | |
1344 | } | |
1345 | ||
1346 | /* Otherwise, break the loop. If we have hit EOF, set yield = TRUE. */ | |
1347 | ||
1348 | else | |
1349 | { | |
1350 | if (len == 0) yield = TRUE; | |
1351 | break; | |
1352 | } | |
1353 | } | |
1354 | ||
1355 | /* Tidying up code. If yield = FALSE there has been an error and errno is set | |
1356 | to something. Ensure the pipes are all closed and the processes are removed. If | |
1357 | there has been an error, kill the processes before waiting for them, just to be | |
1358 | sure. Also apply a paranoia timeout. */ | |
1359 | ||
1360 | TIDY_UP: | |
1361 | save_errno = errno; | |
1362 | ||
f1e894f3 PH |
1363 | (void)close(fd_read); |
1364 | if (fd_write > 0) (void)close(fd_write); | |
059ec3d9 PH |
1365 | |
1366 | if (!yield) | |
1367 | { | |
1368 | if (filter_pid > 0) kill(filter_pid, SIGKILL); | |
1369 | if (write_pid > 0) kill(write_pid, SIGKILL); | |
1370 | } | |
1371 | ||
1372 | /* Wait for the filter process to complete. */ | |
1373 | ||
1374 | DEBUG(D_transport) debug_printf("waiting for filter process\n"); | |
1375 | if (filter_pid > 0 && (rc = child_close(filter_pid, 30)) != 0 && yield) | |
1376 | { | |
1377 | yield = FALSE; | |
1378 | save_errno = ERRNO_FILTER_FAIL; | |
1379 | addr->more_errno = rc; | |
1380 | DEBUG(D_transport) debug_printf("filter process returned %d\n", rc); | |
1381 | } | |
1382 | ||
1383 | /* Wait for the writing process to complete. If it ends successfully, | |
8e669ac1 | 1384 | read the results from its pipe, provided we haven't already had a filter |
35af9f61 | 1385 | process failure. */ |
059ec3d9 PH |
1386 | |
1387 | DEBUG(D_transport) debug_printf("waiting for writing process\n"); | |
1388 | if (write_pid > 0) | |
1389 | { | |
35af9f61 PH |
1390 | rc = child_close(write_pid, 30); |
1391 | if (yield) | |
059ec3d9 | 1392 | { |
8e669ac1 | 1393 | if (rc == 0) |
35af9f61 PH |
1394 | { |
1395 | BOOL ok; | |
1ac6b2e7 | 1396 | int dummy = read(pfd[pipe_read], (void *)&ok, sizeof(BOOL)); |
35af9f61 PH |
1397 | if (!ok) |
1398 | { | |
1ac6b2e7 JH |
1399 | dummy = read(pfd[pipe_read], (void *)&save_errno, sizeof(int)); |
1400 | dummy = read(pfd[pipe_read], (void *)&(addr->more_errno), sizeof(int)); | |
35af9f61 PH |
1401 | yield = FALSE; |
1402 | } | |
1403 | } | |
1404 | else | |
059ec3d9 | 1405 | { |
059ec3d9 | 1406 | yield = FALSE; |
35af9f61 PH |
1407 | save_errno = ERRNO_FILTER_FAIL; |
1408 | addr->more_errno = rc; | |
1409 | DEBUG(D_transport) debug_printf("writing process returned %d\n", rc); | |
059ec3d9 | 1410 | } |
8e669ac1 | 1411 | } |
059ec3d9 | 1412 | } |
f1e894f3 | 1413 | (void)close(pfd[pipe_read]); |
059ec3d9 PH |
1414 | |
1415 | /* If there have been no problems we can now add the terminating "." if this is | |
1416 | SMTP output, turning off escaping beforehand. If the last character from the | |
1417 | filter was not NL, insert a NL to make the SMTP protocol work. */ | |
1418 | ||
1419 | if (yield) | |
1420 | { | |
1421 | nl_check_length = nl_escape_length = 0; | |
1422 | if ((options & topt_end_dot) != 0 && (last_filter_was_NL? | |
1423 | !write_chunk(fd, US".\n", 2, use_crlf) : | |
1424 | !write_chunk(fd, US"\n.\n", 3, use_crlf))) | |
1425 | { | |
1426 | yield = FALSE; | |
1427 | } | |
1428 | ||
1429 | /* Write out any remaining data in the buffer. */ | |
1430 | ||
1431 | else | |
1432 | { | |
1433 | yield = (len = chunk_ptr - deliver_out_buffer) <= 0 || | |
1434 | transport_write_block(fd, deliver_out_buffer, len); | |
1435 | } | |
1436 | } | |
1437 | else errno = save_errno; /* From some earlier error */ | |
1438 | ||
1439 | DEBUG(D_transport) | |
1440 | { | |
1441 | debug_printf("end of filtering transport writing: yield=%d\n", yield); | |
1442 | if (!yield) | |
1443 | debug_printf("errno=%d more_errno=%d\n", errno, addr->more_errno); | |
1444 | } | |
1445 | ||
1446 | return yield; | |
1447 | } | |
1448 | ||
1449 | ||
1450 | ||
1451 | ||
1452 | ||
1453 | /************************************************* | |
1454 | * Update waiting database * | |
1455 | *************************************************/ | |
1456 | ||
1457 | /* This is called when an address is deferred by remote transports that are | |
1458 | capable of sending more than one message over one connection. A database is | |
1459 | maintained for each transport, keeping track of which messages are waiting for | |
1460 | which hosts. The transport can then consult this when eventually a successful | |
1461 | delivery happens, and if it finds that another message is waiting for the same | |
1462 | host, it can fire up a new process to deal with it using the same connection. | |
1463 | ||
1464 | The database records are keyed by host name. They can get full if there are | |
1465 | lots of messages waiting, and so there is a continuation mechanism for them. | |
1466 | ||
1467 | Each record contains a list of message ids, packed end to end without any | |
1468 | zeros. Each one is MESSAGE_ID_LENGTH bytes long. The count field says how many | |
1469 | in this record, and the sequence field says if there are any other records for | |
1470 | this host. If the sequence field is 0, there are none. If it is 1, then another | |
1471 | record with the name <hostname>:0 exists; if it is 2, then two other records | |
1472 | with sequence numbers 0 and 1 exist, and so on. | |
1473 | ||
1474 | Currently, an exhaustive search of all continuation records has to be done to | |
1475 | determine whether to add a message id to a given record. This shouldn't be | |
1476 | too bad except in extreme cases. I can't figure out a *simple* way of doing | |
1477 | better. | |
1478 | ||
1479 | Old records should eventually get swept up by the exim_tidydb utility. | |
1480 | ||
1481 | Arguments: | |
f6c332bd | 1482 | hostlist list of hosts that this message could be sent to |
059ec3d9 PH |
1483 | tpname name of the transport |
1484 | ||
1485 | Returns: nothing | |
1486 | */ | |
1487 | ||
1488 | void | |
1489 | transport_update_waiting(host_item *hostlist, uschar *tpname) | |
1490 | { | |
1491 | uschar buffer[256]; | |
55414b25 | 1492 | const uschar *prevname = US""; |
059ec3d9 PH |
1493 | host_item *host; |
1494 | open_db dbblock; | |
1495 | open_db *dbm_file; | |
1496 | ||
7a0743eb PH |
1497 | DEBUG(D_transport) debug_printf("updating wait-%s database\n", tpname); |
1498 | ||
059ec3d9 PH |
1499 | /* Open the database for this transport */ |
1500 | ||
1501 | sprintf(CS buffer, "wait-%.200s", tpname); | |
1502 | dbm_file = dbfn_open(buffer, O_RDWR, &dbblock, TRUE); | |
1503 | if (dbm_file == NULL) return; | |
1504 | ||
1505 | /* Scan the list of hosts for which this message is waiting, and ensure | |
f6c332bd | 1506 | that the message id is in each host record. */ |
059ec3d9 PH |
1507 | |
1508 | for (host = hostlist; host!= NULL; host = host->next) | |
1509 | { | |
1510 | BOOL already = FALSE; | |
1511 | dbdata_wait *host_record; | |
1512 | uschar *s; | |
1513 | int i, host_length; | |
1514 | ||
059ec3d9 PH |
1515 | /* Skip if this is the same host as we just processed; otherwise remember |
1516 | the name for next time. */ | |
1517 | ||
1518 | if (Ustrcmp(prevname, host->name) == 0) continue; | |
1519 | prevname = host->name; | |
1520 | ||
1521 | /* Look up the host record; if there isn't one, make an empty one. */ | |
1522 | ||
1523 | host_record = dbfn_read(dbm_file, host->name); | |
1524 | if (host_record == NULL) | |
1525 | { | |
1526 | host_record = store_get(sizeof(dbdata_wait) + MESSAGE_ID_LENGTH); | |
1527 | host_record->count = host_record->sequence = 0; | |
1528 | } | |
1529 | ||
1530 | /* Compute the current length */ | |
1531 | ||
1532 | host_length = host_record->count * MESSAGE_ID_LENGTH; | |
1533 | ||
1534 | /* Search the record to see if the current message is already in it. */ | |
1535 | ||
1536 | for (s = host_record->text; s < host_record->text + host_length; | |
1537 | s += MESSAGE_ID_LENGTH) | |
1538 | { | |
1539 | if (Ustrncmp(s, message_id, MESSAGE_ID_LENGTH) == 0) | |
1540 | { already = TRUE; break; } | |
1541 | } | |
1542 | ||
1543 | /* If we haven't found this message in the main record, search any | |
1544 | continuation records that exist. */ | |
1545 | ||
1546 | for (i = host_record->sequence - 1; i >= 0 && !already; i--) | |
1547 | { | |
1548 | dbdata_wait *cont; | |
1549 | sprintf(CS buffer, "%.200s:%d", host->name, i); | |
1550 | cont = dbfn_read(dbm_file, buffer); | |
1551 | if (cont != NULL) | |
1552 | { | |
1553 | int clen = cont->count * MESSAGE_ID_LENGTH; | |
1554 | for (s = cont->text; s < cont->text + clen; s += MESSAGE_ID_LENGTH) | |
1555 | { | |
1556 | if (Ustrncmp(s, message_id, MESSAGE_ID_LENGTH) == 0) | |
1557 | { already = TRUE; break; } | |
1558 | } | |
1559 | } | |
1560 | } | |
1561 | ||
1562 | /* If this message is already in a record, no need to update. */ | |
1563 | ||
7a0743eb PH |
1564 | if (already) |
1565 | { | |
1566 | DEBUG(D_transport) debug_printf("already listed for %s\n", host->name); | |
1567 | continue; | |
1568 | } | |
059ec3d9 PH |
1569 | |
1570 | ||
1571 | /* If this record is full, write it out with a new name constructed | |
1572 | from the sequence number, increase the sequence number, and empty | |
1573 | the record. */ | |
1574 | ||
1575 | if (host_record->count >= WAIT_NAME_MAX) | |
1576 | { | |
1577 | sprintf(CS buffer, "%.200s:%d", host->name, host_record->sequence); | |
1578 | dbfn_write(dbm_file, buffer, host_record, sizeof(dbdata_wait) + host_length); | |
1579 | host_record->sequence++; | |
1580 | host_record->count = 0; | |
1581 | host_length = 0; | |
1582 | } | |
1583 | ||
1584 | /* If this record is not full, increase the size of the record to | |
1585 | allow for one new message id. */ | |
1586 | ||
1587 | else | |
1588 | { | |
1589 | dbdata_wait *newr = | |
1590 | store_get(sizeof(dbdata_wait) + host_length + MESSAGE_ID_LENGTH); | |
1591 | memcpy(newr, host_record, sizeof(dbdata_wait) + host_length); | |
1592 | host_record = newr; | |
1593 | } | |
1594 | ||
1595 | /* Now add the new name on the end */ | |
1596 | ||
1597 | memcpy(host_record->text + host_length, message_id, MESSAGE_ID_LENGTH); | |
1598 | host_record->count++; | |
1599 | host_length += MESSAGE_ID_LENGTH; | |
1600 | ||
1601 | /* Update the database */ | |
1602 | ||
1603 | dbfn_write(dbm_file, host->name, host_record, sizeof(dbdata_wait) + host_length); | |
7a0743eb | 1604 | DEBUG(D_transport) debug_printf("added to list for %s\n", host->name); |
059ec3d9 PH |
1605 | } |
1606 | ||
1607 | /* All now done */ | |
1608 | ||
1609 | dbfn_close(dbm_file); | |
1610 | } | |
1611 | ||
1612 | ||
1613 | ||
1614 | ||
1615 | /************************************************* | |
1616 | * Test for waiting messages * | |
1617 | *************************************************/ | |
1618 | ||
1619 | /* This function is called by a remote transport which uses the previous | |
1620 | function to remember which messages are waiting for which remote hosts. It's | |
1621 | called after a successful delivery and its job is to check whether there is | |
1622 | another message waiting for the same host. However, it doesn't do this if the | |
1623 | current continue sequence is greater than the maximum supplied as an argument, | |
1624 | or greater than the global connection_max_messages, which, if set, overrides. | |
1625 | ||
1626 | Arguments: | |
1627 | transport_name name of the transport | |
1628 | hostname name of the host | |
1629 | local_message_max maximum number of messages down one connection | |
1630 | as set by the caller transport | |
1631 | new_message_id set to the message id of a waiting message | |
1632 | more set TRUE if there are yet more messages waiting | |
a39bd74d JB |
1633 | oicf_func function to call to validate if it is ok to send |
1634 | to this message_id from the current instance. | |
1635 | oicf_data opaque data for oicf_func | |
059ec3d9 PH |
1636 | |
1637 | Returns: TRUE if new_message_id set; FALSE otherwise | |
1638 | */ | |
1639 | ||
a39bd74d JB |
1640 | typedef struct msgq_s |
1641 | { | |
1642 | uschar message_id [MESSAGE_ID_LENGTH + 1]; | |
1643 | BOOL bKeep; | |
1644 | } msgq_t; | |
1645 | ||
059ec3d9 | 1646 | BOOL |
55414b25 | 1647 | transport_check_waiting(const uschar *transport_name, const uschar *hostname, |
a39bd74d | 1648 | int local_message_max, uschar *new_message_id, BOOL *more, oicf oicf_func, void *oicf_data) |
059ec3d9 PH |
1649 | { |
1650 | dbdata_wait *host_record; | |
0539a19d | 1651 | int host_length; |
059ec3d9 PH |
1652 | open_db dbblock; |
1653 | open_db *dbm_file; | |
1654 | uschar buffer[256]; | |
1655 | ||
a39bd74d JB |
1656 | msgq_t *msgq = NULL; |
1657 | int msgq_count = 0; | |
1658 | int msgq_actual = 0; | |
1659 | int i; | |
1660 | BOOL bFound = FALSE; | |
1661 | uschar spool_dir [PATH_MAX]; | |
1662 | uschar spool_file [PATH_MAX]; | |
1663 | struct stat statbuf; | |
1664 | BOOL bContinuation = FALSE; | |
1665 | ||
059ec3d9 PH |
1666 | *more = FALSE; |
1667 | ||
1668 | DEBUG(D_transport) | |
1669 | { | |
1670 | debug_printf("transport_check_waiting entered\n"); | |
1671 | debug_printf(" sequence=%d local_max=%d global_max=%d\n", | |
1672 | continue_sequence, local_message_max, connection_max_messages); | |
1673 | } | |
1674 | ||
1675 | /* Do nothing if we have hit the maximum number that can be send down one | |
1676 | connection. */ | |
1677 | ||
1678 | if (connection_max_messages >= 0) local_message_max = connection_max_messages; | |
1679 | if (local_message_max > 0 && continue_sequence >= local_message_max) | |
1680 | { | |
1681 | DEBUG(D_transport) | |
1682 | debug_printf("max messages for one connection reached: returning\n"); | |
1683 | return FALSE; | |
1684 | } | |
1685 | ||
1686 | /* Open the waiting information database. */ | |
1687 | ||
1688 | sprintf(CS buffer, "wait-%.200s", transport_name); | |
1689 | dbm_file = dbfn_open(buffer, O_RDWR, &dbblock, TRUE); | |
1690 | if (dbm_file == NULL) return FALSE; | |
1691 | ||
1692 | /* See if there is a record for this host; if not, there's nothing to do. */ | |
1693 | ||
1694 | host_record = dbfn_read(dbm_file, hostname); | |
1695 | if (host_record == NULL) | |
1696 | { | |
1697 | dbfn_close(dbm_file); | |
1698 | DEBUG(D_transport) debug_printf("no messages waiting for %s\n", hostname); | |
1699 | return FALSE; | |
1700 | } | |
1701 | ||
1702 | /* If the data in the record looks corrupt, just log something and | |
1703 | don't try to use it. */ | |
1704 | ||
1705 | if (host_record->count > WAIT_NAME_MAX) | |
1706 | { | |
1707 | dbfn_close(dbm_file); | |
1708 | log_write(0, LOG_MAIN|LOG_PANIC, "smtp-wait database entry for %s has bad " | |
1709 | "count=%d (max=%d)", hostname, host_record->count, WAIT_NAME_MAX); | |
1710 | return FALSE; | |
1711 | } | |
1712 | ||
1713 | /* Scan the message ids in the record from the end towards the beginning, | |
1714 | until one is found for which a spool file actually exists. If the record gets | |
1715 | emptied, delete it and continue with any continuation records that may exist. | |
1716 | */ | |
1717 | ||
a39bd74d JB |
1718 | /* For Bug 1141, I refactored this major portion of the routine, it is risky |
1719 | but the 1 off will remain without it. This code now allows me to SKIP over | |
1720 | a message I do not want to send out on this run. */ | |
059ec3d9 | 1721 | |
a39bd74d | 1722 | sprintf(CS spool_dir, "%s/input/", spool_directory); |
059ec3d9 | 1723 | |
a39bd74d JB |
1724 | host_length = host_record->count * MESSAGE_ID_LENGTH; |
1725 | ||
1726 | while (1) | |
059ec3d9 | 1727 | { |
a39bd74d | 1728 | /* create an array to read entire message queue into memory for processing */ |
059ec3d9 | 1729 | |
a39bd74d JB |
1730 | msgq = (msgq_t*) malloc(sizeof(msgq_t) * host_record->count); |
1731 | msgq_count = host_record->count; | |
1732 | msgq_actual = msgq_count; | |
059ec3d9 | 1733 | |
a39bd74d | 1734 | for (i = 0; i < host_record->count; ++i) |
059ec3d9 | 1735 | { |
a39bd74d JB |
1736 | msgq[i].bKeep = TRUE; |
1737 | ||
1738 | Ustrncpy(msgq[i].message_id, host_record->text + (i * MESSAGE_ID_LENGTH), | |
059ec3d9 | 1739 | MESSAGE_ID_LENGTH); |
a39bd74d JB |
1740 | msgq[i].message_id[MESSAGE_ID_LENGTH] = 0; |
1741 | } | |
1742 | ||
1743 | /* first thing remove current message id if it exists */ | |
059ec3d9 | 1744 | |
a39bd74d JB |
1745 | for (i = 0; i < msgq_count; ++i) |
1746 | if (Ustrcmp(msgq[i].message_id, message_id) == 0) | |
1747 | { | |
1748 | msgq[i].bKeep = FALSE; | |
1749 | break; | |
1750 | } | |
1751 | ||
1752 | /* now find the next acceptable message_id */ | |
1753 | ||
1754 | bFound = FALSE; | |
1755 | ||
1756 | for (i = msgq_count - 1; i >= 0; --i) if (msgq[i].bKeep) | |
1757 | { | |
059ec3d9 | 1758 | if (split_spool_directory) |
a39bd74d | 1759 | sprintf(CS spool_file, "%s%c/%s-D", |
6b51df83 | 1760 | spool_dir, msgq[i].message_id[5], msgq[i].message_id); |
059ec3d9 | 1761 | else |
a39bd74d | 1762 | sprintf(CS spool_file, "%s%s-D", spool_dir, msgq[i].message_id); |
059ec3d9 | 1763 | |
a39bd74d JB |
1764 | if (Ustat(spool_file, &statbuf) != 0) |
1765 | msgq[i].bKeep = FALSE; | |
1766 | else if (!oicf_func || oicf_func(msgq[i].message_id, oicf_data)) | |
059ec3d9 | 1767 | { |
a39bd74d JB |
1768 | Ustrcpy(new_message_id, msgq[i].message_id); |
1769 | msgq[i].bKeep = FALSE; | |
1770 | bFound = TRUE; | |
059ec3d9 PH |
1771 | break; |
1772 | } | |
1773 | } | |
1774 | ||
a39bd74d JB |
1775 | /* re-count */ |
1776 | for (msgq_actual = 0, i = 0; i < msgq_count; ++i) | |
1777 | if (msgq[i].bKeep) | |
1778 | msgq_actual++; | |
1779 | ||
1780 | /* reassemble the host record, based on removed message ids, from in | |
1781 | * memory queue. | |
1782 | */ | |
1783 | ||
1784 | if (msgq_actual <= 0) | |
1785 | { | |
1786 | host_length = 0; | |
1787 | host_record->count = 0; | |
1788 | } | |
1789 | else | |
1790 | { | |
1791 | host_length = msgq_actual * MESSAGE_ID_LENGTH; | |
1792 | host_record->count = msgq_actual; | |
1793 | ||
1794 | if (msgq_actual < msgq_count) | |
1795 | { | |
1796 | int new_count; | |
1797 | for (new_count = 0, i = 0; i < msgq_count; ++i) | |
1798 | if (msgq[i].bKeep) | |
1799 | Ustrncpy(&host_record->text[new_count++ * MESSAGE_ID_LENGTH], | |
1800 | msgq[i].message_id, MESSAGE_ID_LENGTH); | |
1801 | ||
1802 | host_record->text[new_count * MESSAGE_ID_LENGTH] = 0; | |
1803 | } | |
1804 | } | |
1805 | ||
1806 | /* Jeremy: check for a continuation record, this code I do not know how to | |
1807 | test but the code should work */ | |
1808 | ||
1809 | bContinuation = FALSE; | |
059ec3d9 PH |
1810 | |
1811 | while (host_length <= 0) | |
1812 | { | |
1813 | int i; | |
a39bd74d | 1814 | dbdata_wait * newr = NULL; |
059ec3d9 PH |
1815 | |
1816 | /* Search for a continuation */ | |
1817 | ||
a39bd74d | 1818 | for (i = host_record->sequence - 1; i >= 0 && !newr; i--) |
059ec3d9 PH |
1819 | { |
1820 | sprintf(CS buffer, "%.200s:%d", hostname, i); | |
1821 | newr = dbfn_read(dbm_file, buffer); | |
1822 | } | |
1823 | ||
1824 | /* If no continuation, delete the current and break the loop */ | |
1825 | ||
a39bd74d | 1826 | if (!newr) |
059ec3d9 PH |
1827 | { |
1828 | dbfn_delete(dbm_file, hostname); | |
1829 | break; | |
1830 | } | |
1831 | ||
1832 | /* Else replace the current with the continuation */ | |
1833 | ||
1834 | dbfn_delete(dbm_file, buffer); | |
1835 | host_record = newr; | |
1836 | host_length = host_record->count * MESSAGE_ID_LENGTH; | |
059ec3d9 | 1837 | |
a39bd74d JB |
1838 | bContinuation = TRUE; |
1839 | } | |
059ec3d9 | 1840 | |
a39bd74d JB |
1841 | if (bFound) |
1842 | break; | |
059ec3d9 PH |
1843 | |
1844 | /* If host_length <= 0 we have emptied a record and not found a good message, | |
1845 | and there are no continuation records. Otherwise there is a continuation | |
1846 | record to process. */ | |
1847 | ||
1848 | if (host_length <= 0) | |
1849 | { | |
1850 | dbfn_close(dbm_file); | |
1851 | DEBUG(D_transport) debug_printf("waiting messages already delivered\n"); | |
1852 | return FALSE; | |
1853 | } | |
a39bd74d JB |
1854 | |
1855 | /* we were not able to find an acceptable message, nor was there a | |
1856 | * continuation record. So bug out, outer logic will clean this up. | |
1857 | */ | |
1858 | ||
1859 | if (!bContinuation) | |
1860 | { | |
94431adb | 1861 | Ustrcpy (new_message_id, message_id); |
a39bd74d JB |
1862 | dbfn_close(dbm_file); |
1863 | return FALSE; | |
1864 | } | |
1865 | } /* we need to process a continuation record */ | |
1866 | ||
1867 | /* clean up in memory queue */ | |
1868 | if (msgq) | |
1869 | { | |
1870 | free (msgq); | |
1871 | msgq = NULL; | |
1872 | msgq_count = 0; | |
1873 | msgq_actual = 0; | |
059ec3d9 PH |
1874 | } |
1875 | ||
1876 | /* Control gets here when an existing message has been encountered; its | |
1877 | id is in new_message_id, and host_length is the revised length of the | |
1878 | host record. If it is zero, the record has been removed. Update the | |
1879 | record if required, close the database, and return TRUE. */ | |
1880 | ||
1881 | if (host_length > 0) | |
1882 | { | |
a39bd74d JB |
1883 | uschar msg [MESSAGE_ID_LENGTH + 1]; |
1884 | int i; | |
1885 | ||
059ec3d9 | 1886 | host_record->count = host_length/MESSAGE_ID_LENGTH; |
a39bd74d JB |
1887 | |
1888 | /* rebuild the host_record->text */ | |
1889 | ||
1890 | for (i = 0; i < host_record->count; ++i) | |
1891 | { | |
1892 | Ustrncpy(msg, host_record->text + (i*MESSAGE_ID_LENGTH), MESSAGE_ID_LENGTH); | |
1893 | msg[MESSAGE_ID_LENGTH] = 0; | |
1894 | } | |
1895 | ||
059ec3d9 PH |
1896 | dbfn_write(dbm_file, hostname, host_record, (int)sizeof(dbdata_wait) + host_length); |
1897 | *more = TRUE; | |
1898 | } | |
1899 | ||
1900 | dbfn_close(dbm_file); | |
1901 | return TRUE; | |
1902 | } | |
1903 | ||
059ec3d9 PH |
1904 | /************************************************* |
1905 | * Deliver waiting message down same socket * | |
1906 | *************************************************/ | |
1907 | ||
1908 | /* Fork a new exim process to deliver the message, and do a re-exec, both to | |
1909 | get a clean delivery process, and to regain root privilege in cases where it | |
1910 | has been given away. | |
1911 | ||
1912 | Arguments: | |
1913 | transport_name to pass to the new process | |
1914 | hostname ditto | |
1915 | hostaddress ditto | |
1916 | id the new message to process | |
1917 | socket_fd the connected socket | |
1918 | ||
1919 | Returns: FALSE if fork fails; TRUE otherwise | |
1920 | */ | |
1921 | ||
1922 | BOOL | |
55414b25 JH |
1923 | transport_pass_socket(const uschar *transport_name, const uschar *hostname, |
1924 | const uschar *hostaddress, uschar *id, int socket_fd) | |
059ec3d9 PH |
1925 | { |
1926 | pid_t pid; | |
1927 | int status; | |
1928 | ||
1929 | DEBUG(D_transport) debug_printf("transport_pass_socket entered\n"); | |
1930 | ||
1931 | if ((pid = fork()) == 0) | |
1932 | { | |
1933 | int i = 16; | |
55414b25 | 1934 | const uschar **argv; |
059ec3d9 PH |
1935 | |
1936 | /* Disconnect entirely from the parent process. If we are running in the | |
1937 | test harness, wait for a bit to allow the previous process time to finish, | |
1938 | write the log, etc., so that the output is always in the same order for | |
1939 | automatic comparison. */ | |
1940 | ||
1941 | if ((pid = fork()) != 0) _exit(EXIT_SUCCESS); | |
ed0e9820 | 1942 | if (running_in_test_harness) sleep(1); |
059ec3d9 PH |
1943 | |
1944 | /* Set up the calling arguments; use the standard function for the basics, | |
1945 | but we have a number of extras that may be added. */ | |
1946 | ||
55414b25 | 1947 | argv = CUSS child_exec_exim(CEE_RETURN_ARGV, TRUE, &i, FALSE, 0); |
059ec3d9 | 1948 | |
6c1c3d1d WB |
1949 | /* Call with the dsn flag */ |
1950 | if (smtp_use_dsn) argv[i++] = US"-MCD"; | |
6c1c3d1d | 1951 | |
059ec3d9 PH |
1952 | if (smtp_authenticated) argv[i++] = US"-MCA"; |
1953 | ||
1954 | #ifdef SUPPORT_TLS | |
1955 | if (tls_offered) argv[i++] = US"-MCT"; | |
1956 | #endif | |
1957 | ||
1958 | if (smtp_use_size) argv[i++] = US"-MCS"; | |
1959 | if (smtp_use_pipelining) argv[i++] = US"-MCP"; | |
1960 | ||
1961 | if (queue_run_pid != (pid_t)0) | |
1962 | { | |
1963 | argv[i++] = US"-MCQ"; | |
1964 | argv[i++] = string_sprintf("%d", queue_run_pid); | |
1965 | argv[i++] = string_sprintf("%d", queue_run_pipe); | |
1966 | } | |
1967 | ||
1968 | argv[i++] = US"-MC"; | |
55414b25 JH |
1969 | argv[i++] = US transport_name; |
1970 | argv[i++] = US hostname; | |
1971 | argv[i++] = US hostaddress; | |
059ec3d9 PH |
1972 | argv[i++] = string_sprintf("%d", continue_sequence + 1); |
1973 | argv[i++] = id; | |
1974 | argv[i++] = NULL; | |
1975 | ||
1976 | /* Arrange for the channel to be on stdin. */ | |
1977 | ||
1978 | if (socket_fd != 0) | |
1979 | { | |
f1e894f3 PH |
1980 | (void)dup2(socket_fd, 0); |
1981 | (void)close(socket_fd); | |
059ec3d9 PH |
1982 | } |
1983 | ||
1984 | DEBUG(D_exec) debug_print_argv(argv); | |
1985 | exim_nullstd(); /* Ensure std{out,err} exist */ | |
1986 | execv(CS argv[0], (char *const *)argv); | |
1987 | ||
1988 | DEBUG(D_any) debug_printf("execv failed: %s\n", strerror(errno)); | |
1989 | _exit(errno); /* Note: must be _exit(), NOT exit() */ | |
1990 | } | |
1991 | ||
1992 | /* If the process creation succeeded, wait for the first-level child, which | |
1993 | immediately exits, leaving the second level process entirely disconnected from | |
1994 | this one. */ | |
1995 | ||
1996 | if (pid > 0) | |
1997 | { | |
1998 | int rc; | |
1999 | while ((rc = wait(&status)) != pid && (rc >= 0 || errno != ECHILD)); | |
2000 | DEBUG(D_transport) debug_printf("transport_pass_socket succeeded\n"); | |
2001 | return TRUE; | |
2002 | } | |
2003 | else | |
2004 | { | |
2005 | DEBUG(D_transport) debug_printf("transport_pass_socket failed to fork: %s\n", | |
2006 | strerror(errno)); | |
2007 | return FALSE; | |
2008 | } | |
2009 | } | |
2010 | ||
2011 | ||
2012 | ||
2013 | /************************************************* | |
2014 | * Set up direct (non-shell) command * | |
2015 | *************************************************/ | |
2016 | ||
2017 | /* This function is called when a command line is to be parsed and executed | |
2018 | directly, without the use of /bin/sh. It is called by the pipe transport, | |
2019 | the queryprogram router, and also from the main delivery code when setting up a | |
2020 | transport filter process. The code for ETRN also makes use of this; in that | |
2021 | case, no addresses are passed. | |
2022 | ||
2023 | Arguments: | |
2024 | argvptr pointer to anchor for argv vector | |
55414b25 | 2025 | cmd points to the command string (modified IN PLACE) |
059ec3d9 PH |
2026 | expand_arguments true if expansion is to occur |
2027 | expand_failed error value to set if expansion fails; not relevant if | |
2028 | addr == NULL | |
2029 | addr chain of addresses, or NULL | |
2030 | etext text for use in error messages | |
2031 | errptr where to put error message if addr is NULL; | |
2032 | otherwise it is put in the first address | |
2033 | ||
2034 | Returns: TRUE if all went well; otherwise an error will be | |
2035 | set in the first address and FALSE returned | |
2036 | */ | |
2037 | ||
2038 | BOOL | |
55414b25 JH |
2039 | transport_set_up_command(const uschar ***argvptr, uschar *cmd, |
2040 | BOOL expand_arguments, int expand_failed, address_item *addr, | |
2041 | uschar *etext, uschar **errptr) | |
059ec3d9 PH |
2042 | { |
2043 | address_item *ad; | |
55414b25 | 2044 | const uschar **argv; |
059ec3d9 PH |
2045 | uschar *s, *ss; |
2046 | int address_count = 0; | |
2047 | int argcount = 0; | |
2048 | int i, max_args; | |
2049 | ||
2050 | /* Get store in which to build an argument list. Count the number of addresses | |
2051 | supplied, and allow for that many arguments, plus an additional 60, which | |
2052 | should be enough for anybody. Multiple addresses happen only when the local | |
2053 | delivery batch option is set. */ | |
2054 | ||
2055 | for (ad = addr; ad != NULL; ad = ad->next) address_count++; | |
2056 | max_args = address_count + 60; | |
2057 | *argvptr = argv = store_get((max_args+1)*sizeof(uschar *)); | |
2058 | ||
2059 | /* Split the command up into arguments terminated by white space. Lose | |
2060 | trailing space at the start and end. Double-quoted arguments can contain \\ and | |
2061 | \" escapes and so can be handled by the standard function; single-quoted | |
2062 | arguments are verbatim. Copy each argument into a new string. */ | |
2063 | ||
2064 | s = cmd; | |
2065 | while (isspace(*s)) s++; | |
2066 | ||
2067 | while (*s != 0 && argcount < max_args) | |
2068 | { | |
2069 | if (*s == '\'') | |
2070 | { | |
2071 | ss = s + 1; | |
2072 | while (*ss != 0 && *ss != '\'') ss++; | |
2073 | argv[argcount++] = ss = store_get(ss - s++); | |
2074 | while (*s != 0 && *s != '\'') *ss++ = *s++; | |
2075 | if (*s != 0) s++; | |
2076 | *ss++ = 0; | |
2077 | } | |
55414b25 | 2078 | else argv[argcount++] = string_copy(string_dequote(CUSS &s)); |
059ec3d9 PH |
2079 | while (isspace(*s)) s++; |
2080 | } | |
2081 | ||
2082 | argv[argcount] = (uschar *)0; | |
2083 | ||
2084 | /* If *s != 0 we have run out of argument slots. */ | |
2085 | ||
2086 | if (*s != 0) | |
2087 | { | |
2088 | uschar *msg = string_sprintf("Too many arguments in command \"%s\" in " | |
2089 | "%s", cmd, etext); | |
2090 | if (addr != NULL) | |
2091 | { | |
2092 | addr->transport_return = FAIL; | |
2093 | addr->message = msg; | |
2094 | } | |
2095 | else *errptr = msg; | |
2096 | return FALSE; | |
2097 | } | |
2098 | ||
2099 | /* Expand each individual argument if required. Expansion happens for pipes set | |
2100 | up in filter files and with directly-supplied commands. It does not happen if | |
2101 | the pipe comes from a traditional .forward file. A failing expansion is a big | |
2102 | disaster if the command came from Exim's configuration; if it came from a user | |
2103 | it is just a normal failure. The expand_failed value is used as the error value | |
2104 | to cater for these two cases. | |
2105 | ||
2106 | An argument consisting just of the text "$pipe_addresses" is treated specially. | |
2107 | It is not passed to the general expansion function. Instead, it is replaced by | |
2108 | a number of arguments, one for each address. This avoids problems with shell | |
2109 | metacharacters and spaces in addresses. | |
2110 | ||
2111 | If the parent of the top address has an original part of "system-filter", this | |
2112 | pipe was set up by the system filter, and we can permit the expansion of | |
2113 | $recipients. */ | |
2114 | ||
2115 | DEBUG(D_transport) | |
2116 | { | |
2117 | debug_printf("direct command:\n"); | |
2118 | for (i = 0; argv[i] != (uschar *)0; i++) | |
2119 | debug_printf(" argv[%d] = %s\n", i, string_printing(argv[i])); | |
2120 | } | |
2121 | ||
2122 | if (expand_arguments) | |
2123 | { | |
2124 | BOOL allow_dollar_recipients = addr != NULL && | |
2125 | addr->parent != NULL && | |
2126 | Ustrcmp(addr->parent->address, "system-filter") == 0; | |
2127 | ||
2128 | for (i = 0; argv[i] != (uschar *)0; i++) | |
2129 | { | |
2130 | ||
2131 | /* Handle special fudge for passing an address list */ | |
2132 | ||
2133 | if (addr != NULL && | |
2134 | (Ustrcmp(argv[i], "$pipe_addresses") == 0 || | |
2135 | Ustrcmp(argv[i], "${pipe_addresses}") == 0)) | |
2136 | { | |
2137 | int additional; | |
2138 | ||
2139 | if (argcount + address_count - 1 > max_args) | |
2140 | { | |
2141 | addr->transport_return = FAIL; | |
2142 | addr->message = string_sprintf("Too many arguments to command \"%s\" " | |
2143 | "in %s", cmd, etext); | |
2144 | return FALSE; | |
2145 | } | |
2146 | ||
2147 | additional = address_count - 1; | |
2148 | if (additional > 0) | |
2149 | memmove(argv + i + 1 + additional, argv + i + 1, | |
2150 | (argcount - i)*sizeof(uschar *)); | |
2151 | ||
09792322 NK |
2152 | for (ad = addr; ad != NULL; ad = ad->next) { |
2153 | argv[i++] = ad->address; | |
2154 | argcount++; | |
2155 | } | |
2156 | ||
700d22f3 PP |
2157 | /* Subtract one since we replace $pipe_addresses */ |
2158 | argcount--; | |
2159 | i--; | |
09792322 NK |
2160 | } |
2161 | ||
2162 | /* Handle special case of $address_pipe when af_force_command is set */ | |
2163 | ||
2164 | else if (addr != NULL && testflag(addr,af_force_command) && | |
2165 | (Ustrcmp(argv[i], "$address_pipe") == 0 || | |
2166 | Ustrcmp(argv[i], "${address_pipe}") == 0)) | |
2167 | { | |
2168 | int address_pipe_i; | |
2169 | int address_pipe_argcount = 0; | |
2170 | int address_pipe_max_args; | |
2171 | uschar **address_pipe_argv; | |
2172 | ||
2173 | /* We can never have more then the argv we will be loading into */ | |
2174 | address_pipe_max_args = max_args - argcount + 1; | |
2175 | ||
2176 | DEBUG(D_transport) | |
700d22f3 | 2177 | debug_printf("address_pipe_max_args=%d\n", address_pipe_max_args); |
09792322 NK |
2178 | |
2179 | /* We allocate an additional for (uschar *)0 */ | |
2180 | address_pipe_argv = store_get((address_pipe_max_args+1)*sizeof(uschar *)); | |
2181 | ||
2182 | /* +1 because addr->local_part[0] == '|' since af_force_command is set */ | |
2183 | s = expand_string(addr->local_part + 1); | |
2184 | ||
700d22f3 PP |
2185 | if (s == NULL || *s == '\0') |
2186 | { | |
2187 | addr->transport_return = FAIL; | |
2188 | addr->message = string_sprintf("Expansion of \"%s\" " | |
2189 | "from command \"%s\" in %s failed: %s", | |
2190 | (addr->local_part + 1), cmd, etext, expand_string_message); | |
09792322 | 2191 | return FALSE; |
700d22f3 | 2192 | } |
09792322 NK |
2193 | |
2194 | while (isspace(*s)) s++; /* strip leading space */ | |
2195 | ||
2196 | while (*s != 0 && address_pipe_argcount < address_pipe_max_args) | |
2197 | { | |
2198 | if (*s == '\'') | |
2199 | { | |
2200 | ss = s + 1; | |
2201 | while (*ss != 0 && *ss != '\'') ss++; | |
2202 | address_pipe_argv[address_pipe_argcount++] = ss = store_get(ss - s++); | |
2203 | while (*s != 0 && *s != '\'') *ss++ = *s++; | |
2204 | if (*s != 0) s++; | |
2205 | *ss++ = 0; | |
2206 | } | |
55414b25 JH |
2207 | else address_pipe_argv[address_pipe_argcount++] = |
2208 | string_copy(string_dequote(CUSS &s)); | |
09792322 NK |
2209 | while (isspace(*s)) s++; /* strip space after arg */ |
2210 | } | |
2211 | ||
2212 | address_pipe_argv[address_pipe_argcount] = (uschar *)0; | |
2213 | ||
2214 | /* If *s != 0 we have run out of argument slots. */ | |
2215 | if (*s != 0) | |
2216 | { | |
2217 | uschar *msg = string_sprintf("Too many arguments in $address_pipe " | |
2218 | "\"%s\" in %s", addr->local_part + 1, etext); | |
2219 | if (addr != NULL) | |
2220 | { | |
2221 | addr->transport_return = FAIL; | |
2222 | addr->message = msg; | |
2223 | } | |
2224 | else *errptr = msg; | |
2225 | return FALSE; | |
2226 | } | |
2227 | ||
700d22f3 PP |
2228 | /* address_pipe_argcount - 1 |
2229 | * because we are replacing $address_pipe in the argument list | |
2230 | * with the first thing it expands to */ | |
09792322 NK |
2231 | if (argcount + address_pipe_argcount - 1 > max_args) |
2232 | { | |
2233 | addr->transport_return = FAIL; | |
2234 | addr->message = string_sprintf("Too many arguments to command " | |
2235 | "\"%s\" after expanding $address_pipe in %s", cmd, etext); | |
2236 | return FALSE; | |
2237 | } | |
2238 | ||
2239 | /* If we are not just able to replace the slot that contained | |
2240 | * $address_pipe (address_pipe_argcount == 1) | |
700d22f3 | 2241 | * We have to move the existing argv by address_pipe_argcount - 1 |
09792322 NK |
2242 | * Visually if address_pipe_argcount == 2: |
2243 | * [argv 0][argv 1][argv 2($address_pipe)][argv 3][0] | |
700d22f3 | 2244 | * [argv 0][argv 1][ap_arg0][ap_arg1][old argv 3][0] |
09792322 NK |
2245 | */ |
2246 | if (address_pipe_argcount > 1) | |
2247 | memmove( | |
2248 | /* current position + additonal args */ | |
2249 | argv + i + address_pipe_argcount, | |
2250 | /* current position + 1 (for the (uschar *)0 at the end) */ | |
2251 | argv + i + 1, | |
2252 | /* -1 for the (uschar *)0 at the end)*/ | |
2253 | (argcount - i)*sizeof(uschar *) | |
2254 | ); | |
2255 | ||
2256 | /* Now we fill in the slots we just moved argv out of | |
2257 | * [argv 0][argv 1][argv 2=pipeargv[0]][argv 3=pipeargv[1]][old argv 3][0] | |
2258 | */ | |
700d22f3 PP |
2259 | for (address_pipe_i = 0; |
2260 | address_pipe_argv[address_pipe_i] != (uschar *)0; | |
2261 | address_pipe_i++) | |
2262 | { | |
2263 | argv[i++] = address_pipe_argv[address_pipe_i]; | |
2264 | argcount++; | |
09792322 NK |
2265 | } |
2266 | ||
700d22f3 PP |
2267 | /* Subtract one since we replace $address_pipe */ |
2268 | argcount--; | |
2269 | i--; | |
059ec3d9 PH |
2270 | } |
2271 | ||
2272 | /* Handle normal expansion string */ | |
2273 | ||
2274 | else | |
2275 | { | |
55414b25 | 2276 | const uschar *expanded_arg; |
059ec3d9 | 2277 | enable_dollar_recipients = allow_dollar_recipients; |
55414b25 | 2278 | expanded_arg = expand_cstring(argv[i]); |
059ec3d9 PH |
2279 | enable_dollar_recipients = FALSE; |
2280 | ||
2281 | if (expanded_arg == NULL) | |
2282 | { | |
2283 | uschar *msg = string_sprintf("Expansion of \"%s\" " | |
2284 | "from command \"%s\" in %s failed: %s", | |
2285 | argv[i], cmd, etext, expand_string_message); | |
2286 | if (addr != NULL) | |
2287 | { | |
2288 | addr->transport_return = expand_failed; | |
2289 | addr->message = msg; | |
2290 | } | |
2291 | else *errptr = msg; | |
2292 | return FALSE; | |
2293 | } | |
2294 | argv[i] = expanded_arg; | |
2295 | } | |
2296 | } | |
2297 | ||
2298 | DEBUG(D_transport) | |
2299 | { | |
2300 | debug_printf("direct command after expansion:\n"); | |
2301 | for (i = 0; argv[i] != (uschar *)0; i++) | |
2302 | debug_printf(" argv[%d] = %s\n", i, string_printing(argv[i])); | |
2303 | } | |
2304 | } | |
2305 | ||
2306 | return TRUE; | |
2307 | } | |
2308 | ||
511a6c14 JH |
2309 | /* vi: aw ai sw=2 |
2310 | */ | |
059ec3d9 | 2311 | /* End of transport.c */ |