Commit | Line | Data |
---|---|---|
059ec3d9 PH |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
f9ba5e22 | 5 | /* Copyright (c) University of Cambridge 1995 - 2018 */ |
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 | ||
059ec3d9 PH |
14 | /* Generic options for transports, all of which live inside transport_instance |
15 | data blocks and which therefore have the opt_public flag set. Note that there | |
16 | are other options living inside this structure which can be set only from | |
17 | certain transports. */ | |
18 | ||
19 | optionlist optionlist_transports[] = { | |
f2ed27cf | 20 | /* name type value */ |
059ec3d9 PH |
21 | { "*expand_group", opt_stringptr|opt_hidden|opt_public, |
22 | (void *)offsetof(transport_instance, expand_gid) }, | |
23 | { "*expand_user", opt_stringptr|opt_hidden|opt_public, | |
24 | (void *)offsetof(transport_instance, expand_uid) }, | |
25 | { "*headers_rewrite_flags", opt_int|opt_public|opt_hidden, | |
26 | (void *)offsetof(transport_instance, rewrite_existflags) }, | |
27 | { "*headers_rewrite_rules", opt_void|opt_public|opt_hidden, | |
28 | (void *)offsetof(transport_instance, rewrite_rules) }, | |
29 | { "*set_group", opt_bool|opt_hidden|opt_public, | |
30 | (void *)offsetof(transport_instance, gid_set) }, | |
31 | { "*set_user", opt_bool|opt_hidden|opt_public, | |
32 | (void *)offsetof(transport_instance, uid_set) }, | |
33 | { "body_only", opt_bool|opt_public, | |
34 | (void *)offsetof(transport_instance, body_only) }, | |
35 | { "current_directory", opt_stringptr|opt_public, | |
36 | (void *)offsetof(transport_instance, current_dir) }, | |
37 | { "debug_print", opt_stringptr | opt_public, | |
38 | (void *)offsetof(transport_instance, debug_string) }, | |
39 | { "delivery_date_add", opt_bool|opt_public, | |
40 | (void *)(offsetof(transport_instance, delivery_date_add)) }, | |
41 | { "disable_logging", opt_bool|opt_public, | |
42 | (void *)(offsetof(transport_instance, disable_logging)) }, | |
43 | { "driver", opt_stringptr|opt_public, | |
44 | (void *)offsetof(transport_instance, driver_name) }, | |
45 | { "envelope_to_add", opt_bool|opt_public, | |
46 | (void *)(offsetof(transport_instance, envelope_to_add)) }, | |
0cbf2b82 | 47 | #ifndef DISABLE_EVENT |
774ef2d7 JH |
48 | { "event_action", opt_stringptr | opt_public, |
49 | (void *)offsetof(transport_instance, event_action) }, | |
50 | #endif | |
059ec3d9 PH |
51 | { "group", opt_expand_gid|opt_public, |
52 | (void *)offsetof(transport_instance, gid) }, | |
846726c5 | 53 | { "headers_add", opt_stringptr|opt_public|opt_rep_str, |
059ec3d9 PH |
54 | (void *)offsetof(transport_instance, add_headers) }, |
55 | { "headers_only", opt_bool|opt_public, | |
56 | (void *)offsetof(transport_instance, headers_only) }, | |
846726c5 | 57 | { "headers_remove", opt_stringptr|opt_public|opt_rep_str, |
059ec3d9 PH |
58 | (void *)offsetof(transport_instance, remove_headers) }, |
59 | { "headers_rewrite", opt_rewrite|opt_public, | |
60 | (void *)offsetof(transport_instance, headers_rewrite) }, | |
61 | { "home_directory", opt_stringptr|opt_public, | |
62 | (void *)offsetof(transport_instance, home_dir) }, | |
63 | { "initgroups", opt_bool|opt_public, | |
64 | (void *)offsetof(transport_instance, initgroups) }, | |
fa41615d JH |
65 | { "max_parallel", opt_stringptr|opt_public, |
66 | (void *)offsetof(transport_instance, max_parallel) }, | |
059ec3d9 PH |
67 | { "message_size_limit", opt_stringptr|opt_public, |
68 | (void *)offsetof(transport_instance, message_size_limit) }, | |
69 | { "rcpt_include_affixes", opt_bool|opt_public, | |
70 | (void *)offsetof(transport_instance, rcpt_include_affixes) }, | |
71 | { "retry_use_local_part", opt_bool|opt_public, | |
72 | (void *)offsetof(transport_instance, retry_use_local_part) }, | |
73 | { "return_path", opt_stringptr|opt_public, | |
74 | (void *)(offsetof(transport_instance, return_path)) }, | |
75 | { "return_path_add", opt_bool|opt_public, | |
76 | (void *)(offsetof(transport_instance, return_path_add)) }, | |
77 | { "shadow_condition", opt_stringptr|opt_public, | |
78 | (void *)offsetof(transport_instance, shadow_condition) }, | |
79 | { "shadow_transport", opt_stringptr|opt_public, | |
80 | (void *)offsetof(transport_instance, shadow) }, | |
81 | { "transport_filter", opt_stringptr|opt_public, | |
82 | (void *)offsetof(transport_instance, filter_command) }, | |
83 | { "transport_filter_timeout", opt_time|opt_public, | |
84 | (void *)offsetof(transport_instance, filter_timeout) }, | |
85 | { "user", opt_expand_uid|opt_public, | |
86 | (void *)offsetof(transport_instance, uid) } | |
87 | }; | |
88 | ||
c0b9d3e8 | 89 | int optionlist_transports_size = nelem(optionlist_transports); |
059ec3d9 | 90 | |
d185889f JH |
91 | #ifdef MACRO_PREDEF |
92 | ||
5f69a529 | 93 | # include "macro_predef.h" |
059ec3d9 | 94 | |
c0b9d3e8 | 95 | void |
d185889f | 96 | options_transports(void) |
c0b9d3e8 | 97 | { |
d185889f | 98 | uschar buf[64]; |
c0b9d3e8 | 99 | |
d185889f | 100 | options_from_list(optionlist_transports, nelem(optionlist_transports), US"TRANSPORTS", NULL); |
c0b9d3e8 | 101 | |
d7978c0f | 102 | for (transport_info * ti = transports_available; ti->driver_name[0]; ti++) |
4945f557 | 103 | { |
cab0c277 | 104 | spf(buf, sizeof(buf), US"_DRIVER_TRANSPORT_%T", ti->driver_name); |
d185889f JH |
105 | builtin_macro_create(buf); |
106 | options_from_list(ti->options, (unsigned)*ti->options_count, US"TRANSPORT", ti->driver_name); | |
4945f557 | 107 | } |
383832ef | 108 | } |
c0b9d3e8 | 109 | |
d185889f JH |
110 | #else /*!MACRO_PREDEF*/ |
111 | ||
112 | /* Structure for keeping list of addresses that have been added to | |
113 | Envelope-To:, in order to avoid duplication. */ | |
114 | ||
115 | struct aci { | |
116 | struct aci *next; | |
117 | address_item *ptr; | |
118 | }; | |
119 | ||
120 | ||
121 | /* Static data for write_chunk() */ | |
122 | ||
123 | static uschar *chunk_ptr; /* chunk pointer */ | |
124 | static uschar *nl_check; /* string to look for at line start */ | |
125 | static int nl_check_length; /* length of same */ | |
126 | static uschar *nl_escape; /* string to insert */ | |
127 | static int nl_escape_length; /* length of same */ | |
128 | static int nl_partial_match; /* length matched at chunk end */ | |
129 | ||
130 | ||
059ec3d9 PH |
131 | /************************************************* |
132 | * Initialize transport list * | |
133 | *************************************************/ | |
134 | ||
135 | /* Read the transports section of the configuration file, and set up a chain of | |
136 | transport instances according to its contents. Each transport has generic | |
137 | options and may also have its own private options. This function is only ever | |
138 | called when transports == NULL. We use generic code in readconf to do most of | |
139 | the work. */ | |
140 | ||
141 | void | |
142 | transport_init(void) | |
143 | { | |
059ec3d9 PH |
144 | readconf_driver_init(US"transport", |
145 | (driver_instance **)(&transports), /* chain anchor */ | |
146 | (driver_info *)transports_available, /* available drivers */ | |
147 | sizeof(transport_info), /* size of info block */ | |
148 | &transport_defaults, /* default values for generic options */ | |
149 | sizeof(transport_instance), /* size of instance block */ | |
150 | optionlist_transports, /* generic options */ | |
151 | optionlist_transports_size); | |
152 | ||
153 | /* Now scan the configured transports and check inconsistencies. A shadow | |
154 | transport is permitted only for local transports. */ | |
155 | ||
d7978c0f | 156 | for (transport_instance * t = transports; t; t = t->next) |
059ec3d9 | 157 | { |
7b4c8c1f JH |
158 | if (!t->info->local && t->shadow) |
159 | log_write(0, LOG_PANIC_DIE|LOG_CONFIG, | |
160 | "shadow transport not allowed on non-local transport %s", t->name); | |
059ec3d9 PH |
161 | |
162 | if (t->body_only && t->headers_only) | |
163 | log_write(0, LOG_PANIC_DIE|LOG_CONFIG, | |
164 | "%s transport: body_only and headers_only are mutually exclusive", | |
165 | t->name); | |
166 | } | |
167 | } | |
168 | ||
169 | ||
170 | ||
171 | /************************************************* | |
172 | * Write block of data * | |
173 | *************************************************/ | |
174 | ||
175 | /* Subroutine called by write_chunk() and at the end of the message actually | |
176 | to write a data block. Also called directly by some transports to write | |
177 | additional data to the file descriptor (e.g. prefix, suffix). | |
178 | ||
179 | If a transport wants data transfers to be timed, it sets a non-zero value in | |
180 | transport_write_timeout. A non-zero transport_write_timeout causes a timer to | |
181 | be set for each block of data written from here. If time runs out, then write() | |
182 | fails and provokes an error return. The caller can then inspect sigalrm_seen to | |
183 | check for a timeout. | |
184 | ||
185 | On some systems, if a quota is exceeded during the write, the yield is the | |
186 | number of bytes written rather than an immediate error code. This also happens | |
187 | on some systems in other cases, for example a pipe that goes away because the | |
188 | other end's process terminates (Linux). On other systems, (e.g. Solaris 2) you | |
189 | get the error codes the first time. | |
190 | ||
191 | The write() function is also interruptible; the Solaris 2.6 man page says: | |
192 | ||
193 | If write() is interrupted by a signal before it writes any | |
194 | data, it will return -1 with errno set to EINTR. | |
195 | ||
196 | If write() is interrupted by a signal after it successfully | |
197 | writes some data, it will return the number of bytes written. | |
198 | ||
199 | To handle these cases, we want to restart the write() to output the remainder | |
200 | of the data after a non-negative return from write(), except after a timeout. | |
201 | In the error cases (EDQUOT, EPIPE) no bytes get written the second time, and a | |
202 | proper error then occurs. In principle, after an interruption, the second | |
203 | write() could suffer the same fate, but we do not want to continue for | |
204 | evermore, so stick a maximum repetition count on the loop to act as a | |
205 | longstop. | |
206 | ||
207 | Arguments: | |
42055a33 | 208 | tctx transport context: file descriptor or string to write to |
059ec3d9 PH |
209 | block block of bytes to write |
210 | len number of bytes to write | |
925ac8e4 | 211 | more further data expected soon |
059ec3d9 PH |
212 | |
213 | Returns: TRUE on success, FALSE on failure (with errno preserved); | |
214 | transport_count is incremented by the number of bytes written | |
215 | */ | |
216 | ||
42055a33 JH |
217 | static BOOL |
218 | transport_write_block_fd(transport_ctx * tctx, uschar *block, int len, BOOL more) | |
059ec3d9 | 219 | { |
d7978c0f | 220 | int rc, save_errno; |
958541e9 | 221 | int local_timeout = transport_write_timeout; |
42055a33 | 222 | int fd = tctx->u.fd; |
958541e9 PH |
223 | |
224 | /* This loop is for handling incomplete writes and other retries. In most | |
225 | normal cases, it is only ever executed once. */ | |
059ec3d9 | 226 | |
d7978c0f | 227 | for (int i = 0; i < 100; i++) |
059ec3d9 PH |
228 | { |
229 | DEBUG(D_transport) | |
42055a33 JH |
230 | debug_printf("writing data block fd=%d size=%d timeout=%d%s\n", |
231 | fd, len, local_timeout, more ? " (more expected)" : ""); | |
059ec3d9 | 232 | |
958541e9 PH |
233 | /* This code makes use of alarm() in order to implement the timeout. This |
234 | isn't a very tidy way of doing things. Using non-blocking I/O with select() | |
235 | provides a neater approach. However, I don't know how to do this when TLS is | |
236 | in use. */ | |
059ec3d9 | 237 | |
958541e9 PH |
238 | if (transport_write_timeout <= 0) /* No timeout wanted */ |
239 | { | |
42055a33 | 240 | rc = |
01603eec | 241 | #ifndef DISABLE_TLS |
74f1a423 | 242 | tls_out.active.sock == fd ? tls_write(tls_out.active.tls_ctx, block, len, more) : |
42055a33 JH |
243 | #endif |
244 | #ifdef MSG_MORE | |
b3b37076 JH |
245 | more && !(tctx->options & topt_not_socket) |
246 | ? send(fd, block, len, MSG_MORE) : | |
42055a33 JH |
247 | #endif |
248 | write(fd, block, len); | |
958541e9 PH |
249 | save_errno = errno; |
250 | } | |
059ec3d9 | 251 | |
958541e9 | 252 | /* Timeout wanted. */ |
059ec3d9 | 253 | |
958541e9 | 254 | else |
059ec3d9 | 255 | { |
c2a1bba0 | 256 | ALARM(local_timeout); |
42055a33 JH |
257 | |
258 | rc = | |
01603eec | 259 | #ifndef DISABLE_TLS |
74f1a423 | 260 | tls_out.active.sock == fd ? tls_write(tls_out.active.tls_ctx, block, len, more) : |
42055a33 JH |
261 | #endif |
262 | #ifdef MSG_MORE | |
e01d111e JH |
263 | more && !(tctx->options & topt_not_socket) |
264 | ? send(fd, block, len, MSG_MORE) : | |
59932f7d | 265 | #endif |
42055a33 JH |
266 | write(fd, block, len); |
267 | ||
958541e9 | 268 | save_errno = errno; |
c2a1bba0 | 269 | local_timeout = ALARM_CLR(0); |
059ec3d9 PH |
270 | if (sigalrm_seen) |
271 | { | |
272 | errno = ETIMEDOUT; | |
273 | return FALSE; | |
274 | } | |
275 | } | |
276 | ||
277 | /* Hopefully, the most common case is success, so test that first. */ | |
278 | ||
279 | if (rc == len) { transport_count += len; return TRUE; } | |
280 | ||
958541e9 PH |
281 | /* A non-negative return code is an incomplete write. Try again for the rest |
282 | of the block. If we have exactly hit the timeout, give up. */ | |
059ec3d9 PH |
283 | |
284 | if (rc >= 0) | |
285 | { | |
286 | len -= rc; | |
287 | block += rc; | |
288 | transport_count += rc; | |
289 | DEBUG(D_transport) debug_printf("write incomplete (%d)\n", rc); | |
958541e9 | 290 | goto CHECK_TIMEOUT; /* A few lines below */ |
059ec3d9 PH |
291 | } |
292 | ||
293 | /* A negative return code with an EINTR error is another form of | |
294 | incomplete write, zero bytes having been written */ | |
295 | ||
296 | if (save_errno == EINTR) | |
297 | { | |
298 | DEBUG(D_transport) | |
299 | debug_printf("write interrupted before anything written\n"); | |
958541e9 | 300 | goto CHECK_TIMEOUT; /* A few lines below */ |
059ec3d9 PH |
301 | } |
302 | ||
303 | /* A response of EAGAIN from write() is likely only in the case of writing | |
304 | to a FIFO that is not swallowing the data as fast as Exim is writing it. */ | |
305 | ||
306 | if (save_errno == EAGAIN) | |
307 | { | |
308 | DEBUG(D_transport) | |
309 | debug_printf("write temporarily locked out, waiting 1 sec\n"); | |
310 | sleep(1); | |
958541e9 PH |
311 | |
312 | /* Before continuing to try another write, check that we haven't run out of | |
313 | time. */ | |
314 | ||
315 | CHECK_TIMEOUT: | |
316 | if (transport_write_timeout > 0 && local_timeout <= 0) | |
317 | { | |
318 | errno = ETIMEDOUT; | |
319 | return FALSE; | |
320 | } | |
059ec3d9 PH |
321 | continue; |
322 | } | |
323 | ||
324 | /* Otherwise there's been an error */ | |
325 | ||
326 | DEBUG(D_transport) debug_printf("writing error %d: %s\n", save_errno, | |
327 | strerror(save_errno)); | |
328 | errno = save_errno; | |
329 | return FALSE; | |
330 | } | |
331 | ||
332 | /* We've tried and tried and tried but still failed */ | |
333 | ||
334 | errno = ERRNO_WRITEINCOMPLETE; | |
335 | return FALSE; | |
336 | } | |
337 | ||
338 | ||
42055a33 JH |
339 | BOOL |
340 | transport_write_block(transport_ctx * tctx, uschar *block, int len, BOOL more) | |
341 | { | |
342 | if (!(tctx->options & topt_output_string)) | |
343 | return transport_write_block_fd(tctx, block, len, more); | |
344 | ||
345 | /* Write to expanding-string. NOTE: not NUL-terminated */ | |
346 | ||
347 | if (!tctx->u.msg) | |
acec9514 | 348 | tctx->u.msg = string_get(1024); |
42055a33 | 349 | |
acec9514 | 350 | tctx->u.msg = string_catn(tctx->u.msg, block, len); |
42055a33 JH |
351 | return TRUE; |
352 | } | |
353 | ||
354 | ||
059ec3d9 PH |
355 | |
356 | ||
357 | /************************************************* | |
358 | * Write formatted string * | |
359 | *************************************************/ | |
360 | ||
361 | /* This is called by various transports. It is a convenience function. | |
362 | ||
363 | Arguments: | |
364 | fd file descriptor | |
365 | format string format | |
366 | ... arguments for format | |
367 | ||
368 | Returns: the yield of transport_write_block() | |
369 | */ | |
370 | ||
371 | BOOL | |
1ba28e2b | 372 | transport_write_string(int fd, const char *format, ...) |
059ec3d9 | 373 | { |
cab0c277 | 374 | transport_ctx tctx = {{0}}; |
d12746bc | 375 | gstring gs = { .size = big_buffer_size, .ptr = 0, .s = big_buffer }; |
059ec3d9 | 376 | va_list ap; |
d12746bc | 377 | |
059ec3d9 | 378 | va_start(ap, format); |
d12746bc | 379 | if (!string_vformat(&gs, FALSE, format, ap)) |
059ec3d9 PH |
380 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "overlong formatted string in transport"); |
381 | va_end(ap); | |
42055a33 | 382 | tctx.u.fd = fd; |
d12746bc | 383 | return transport_write_block(&tctx, gs.s, gs.ptr, FALSE); |
059ec3d9 PH |
384 | } |
385 | ||
386 | ||
387 | ||
388 | ||
42055a33 JH |
389 | void |
390 | transport_write_reset(int options) | |
391 | { | |
392 | if (!(options & topt_continuation)) chunk_ptr = deliver_out_buffer; | |
393 | nl_partial_match = -1; | |
394 | nl_check_length = nl_escape_length = 0; | |
395 | } | |
396 | ||
397 | ||
398 | ||
059ec3d9 PH |
399 | /************************************************* |
400 | * Write character chunk * | |
401 | *************************************************/ | |
402 | ||
403 | /* Subroutine used by transport_write_message() to scan character chunks for | |
404 | newlines and act appropriately. The object is to minimise the number of writes. | |
405 | The output byte stream is buffered up in deliver_out_buffer, which is written | |
406 | only when it gets full, thus minimizing write operations and TCP packets. | |
407 | ||
408 | Static data is used to handle the case when the last character of the previous | |
409 | chunk was NL, or matched part of the data that has to be escaped. | |
410 | ||
411 | Arguments: | |
42055a33 JH |
412 | tctx transport context - processing to be done during output, |
413 | and file descriptor to write to | |
059ec3d9 PH |
414 | chunk pointer to data to write |
415 | len length of data to write | |
059ec3d9 PH |
416 | |
417 | In addition, the static nl_xxx variables must be set as required. | |
418 | ||
419 | Returns: TRUE on success, FALSE on failure (with errno preserved) | |
420 | */ | |
421 | ||
42055a33 JH |
422 | BOOL |
423 | write_chunk(transport_ctx * tctx, uschar *chunk, int len) | |
059ec3d9 PH |
424 | { |
425 | uschar *start = chunk; | |
426 | uschar *end = chunk + len; | |
059ec3d9 PH |
427 | int mlen = DELIVER_OUT_BUFFER_SIZE - nl_escape_length - 2; |
428 | ||
429 | /* The assumption is made that the check string will never stretch over move | |
430 | than one chunk since the only time there are partial matches is when copying | |
431 | the body in large buffers. There is always enough room in the buffer for an | |
432 | escape string, since the loop below ensures this for each character it | |
433 | processes, and it won't have stuck in the escape string if it left a partial | |
434 | match. */ | |
435 | ||
436 | if (nl_partial_match >= 0) | |
437 | { | |
438 | if (nl_check_length > 0 && len >= nl_check_length && | |
439 | Ustrncmp(start, nl_check + nl_partial_match, | |
440 | nl_check_length - nl_partial_match) == 0) | |
441 | { | |
442 | Ustrncpy(chunk_ptr, nl_escape, nl_escape_length); | |
443 | chunk_ptr += nl_escape_length; | |
444 | start += nl_check_length - nl_partial_match; | |
445 | } | |
446 | ||
447 | /* The partial match was a false one. Insert the characters carried over | |
448 | from the previous chunk. */ | |
449 | ||
450 | else if (nl_partial_match > 0) | |
451 | { | |
452 | Ustrncpy(chunk_ptr, nl_check, nl_partial_match); | |
453 | chunk_ptr += nl_partial_match; | |
454 | } | |
455 | ||
456 | nl_partial_match = -1; | |
457 | } | |
458 | ||
459 | /* Now process the characters in the chunk. Whenever we hit a newline we check | |
460 | for possible escaping. The code for the non-NL route should be as fast as | |
461 | possible. */ | |
462 | ||
d7978c0f | 463 | for (uschar * ptr = start; ptr < end; ptr++) |
059ec3d9 | 464 | { |
6d5c916c | 465 | int ch, len; |
059ec3d9 PH |
466 | |
467 | /* Flush the buffer if it has reached the threshold - we want to leave enough | |
468 | room for the next uschar, plus a possible extra CR for an LF, plus the escape | |
469 | string. */ | |
470 | ||
6d5c916c | 471 | if ((len = chunk_ptr - deliver_out_buffer) > mlen) |
059ec3d9 | 472 | { |
58fc5fb2 JH |
473 | DEBUG(D_transport) debug_printf("flushing headers buffer\n"); |
474 | ||
6d5c916c JH |
475 | /* If CHUNKING, prefix with BDAT (size) NON-LAST. Also, reap responses |
476 | from previous SMTP commands. */ | |
477 | ||
d315eda1 | 478 | if (tctx->options & topt_use_bdat && tctx->chunk_cb) |
58fc5fb2 | 479 | { |
d2aa036b | 480 | if ( tctx->chunk_cb(tctx, (unsigned)len, 0) != OK |
42055a33 | 481 | || !transport_write_block(tctx, deliver_out_buffer, len, FALSE) |
d2aa036b | 482 | || tctx->chunk_cb(tctx, 0, tc_reap_prev) != OK |
58fc5fb2 JH |
483 | ) |
484 | return FALSE; | |
485 | } | |
486 | else | |
42055a33 | 487 | if (!transport_write_block(tctx, deliver_out_buffer, len, FALSE)) |
6d5c916c | 488 | return FALSE; |
059ec3d9 PH |
489 | chunk_ptr = deliver_out_buffer; |
490 | } | |
491 | ||
328c5688 JH |
492 | /* Remove CR before NL if required */ |
493 | ||
494 | if ( *ptr == '\r' && ptr[1] == '\n' | |
d315eda1 | 495 | && !(tctx->options & topt_use_crlf) |
8768d548 | 496 | && f.spool_file_wireformat |
328c5688 JH |
497 | ) |
498 | ptr++; | |
499 | ||
059ec3d9 PH |
500 | if ((ch = *ptr) == '\n') |
501 | { | |
502 | int left = end - ptr - 1; /* count of chars left after NL */ | |
503 | ||
504 | /* Insert CR before NL if required */ | |
505 | ||
8768d548 | 506 | if (tctx->options & topt_use_crlf && !f.spool_file_wireformat) |
328c5688 | 507 | *chunk_ptr++ = '\r'; |
059ec3d9 | 508 | *chunk_ptr++ = '\n'; |
332f5cf3 | 509 | transport_newlines++; |
059ec3d9 PH |
510 | |
511 | /* The check_string test (formerly "from hack") replaces the specific | |
512 | string at the start of a line with an escape string (e.g. "From " becomes | |
513 | ">From " or "." becomes "..". It is a case-sensitive test. The length | |
514 | check above ensures there is always enough room to insert this string. */ | |
515 | ||
516 | if (nl_check_length > 0) | |
517 | { | |
518 | if (left >= nl_check_length && | |
519 | Ustrncmp(ptr+1, nl_check, nl_check_length) == 0) | |
520 | { | |
521 | Ustrncpy(chunk_ptr, nl_escape, nl_escape_length); | |
522 | chunk_ptr += nl_escape_length; | |
523 | ptr += nl_check_length; | |
524 | } | |
525 | ||
526 | /* Handle the case when there isn't enough left to match the whole | |
527 | check string, but there may be a partial match. We remember how many | |
528 | characters matched, and finish processing this chunk. */ | |
529 | ||
530 | else if (left <= 0) nl_partial_match = 0; | |
531 | ||
532 | else if (Ustrncmp(ptr+1, nl_check, left) == 0) | |
533 | { | |
534 | nl_partial_match = left; | |
535 | ptr = end; | |
536 | } | |
537 | } | |
538 | } | |
539 | ||
540 | /* Not a NL character */ | |
541 | ||
542 | else *chunk_ptr++ = ch; | |
543 | } | |
544 | ||
545 | return TRUE; | |
546 | } | |
547 | ||
548 | ||
549 | ||
550 | ||
551 | /************************************************* | |
552 | * Generate address for RCPT TO * | |
553 | *************************************************/ | |
554 | ||
555 | /* This function puts together an address for RCPT to, using the caseful | |
556 | version of the local part and the caseful version of the domain. If there is no | |
557 | prefix or suffix, or if affixes are to be retained, we can just use the | |
558 | original address. Otherwise, if there is a prefix but no suffix we can use a | |
559 | pointer into the original address. If there is a suffix, however, we have to | |
560 | build a new string. | |
561 | ||
562 | Arguments: | |
563 | addr the address item | |
564 | include_affixes TRUE if affixes are to be included | |
565 | ||
566 | Returns: a string | |
567 | */ | |
568 | ||
569 | uschar * | |
570 | transport_rcpt_address(address_item *addr, BOOL include_affixes) | |
571 | { | |
572 | uschar *at; | |
573 | int plen, slen; | |
574 | ||
575 | if (include_affixes) | |
576 | { | |
577 | setflag(addr, af_include_affixes); /* Affects logged => line */ | |
578 | return addr->address; | |
579 | } | |
580 | ||
581 | if (addr->suffix == NULL) | |
582 | { | |
583 | if (addr->prefix == NULL) return addr->address; | |
584 | return addr->address + Ustrlen(addr->prefix); | |
585 | } | |
586 | ||
587 | at = Ustrrchr(addr->address, '@'); | |
588 | plen = (addr->prefix == NULL)? 0 : Ustrlen(addr->prefix); | |
589 | slen = Ustrlen(addr->suffix); | |
590 | ||
bb07bcd3 | 591 | return string_sprintf("%.*s@%s", (int)(at - addr->address - plen - slen), |
059ec3d9 PH |
592 | addr->address + plen, at + 1); |
593 | } | |
594 | ||
595 | ||
596 | /************************************************* | |
597 | * Output Envelope-To: address & scan duplicates * | |
598 | *************************************************/ | |
599 | ||
600 | /* This function is called from internal_transport_write_message() below, when | |
601 | generating an Envelope-To: header line. It checks for duplicates of the given | |
602 | address and its ancestors. When one is found, this function calls itself | |
603 | recursively, to output the envelope address of the duplicate. | |
604 | ||
605 | We want to avoid duplication in the list, which can arise for example when | |
606 | A->B,C and then both B and C alias to D. This can also happen when there are | |
607 | unseen drivers in use. So a list of addresses that have been output is kept in | |
608 | the plist variable. | |
609 | ||
610 | It is also possible to have loops in the address ancestry/duplication graph, | |
611 | for example if there are two top level addresses A and B and we have A->B,C and | |
612 | B->A. To break the loop, we use a list of processed addresses in the dlist | |
613 | variable. | |
614 | ||
615 | After handling duplication, this function outputs the progenitor of the given | |
616 | address. | |
617 | ||
618 | Arguments: | |
619 | p the address we are interested in | |
620 | pplist address of anchor of the list of addresses not to output | |
621 | pdlist address of anchor of the list of processed addresses | |
622 | first TRUE if this is the first address; set it FALSE afterwards | |
6d5c916c | 623 | tctx transport context - processing to be done during output |
42055a33 | 624 | and the file descriptor to write to |
059ec3d9 PH |
625 | |
626 | Returns: FALSE if writing failed | |
627 | */ | |
628 | ||
629 | static BOOL | |
630 | write_env_to(address_item *p, struct aci **pplist, struct aci **pdlist, | |
42055a33 | 631 | BOOL *first, transport_ctx * tctx) |
059ec3d9 PH |
632 | { |
633 | address_item *pp; | |
634 | struct aci *ppp; | |
635 | ||
636 | /* Do nothing if we have already handled this address. If not, remember it | |
637 | so that we don't handle it again. */ | |
638 | ||
ff5aac2b | 639 | for (ppp = *pdlist; ppp; ppp = ppp->next) if (p == ppp->ptr) return TRUE; |
059ec3d9 PH |
640 | |
641 | ppp = store_get(sizeof(struct aci)); | |
642 | ppp->next = *pdlist; | |
643 | *pdlist = ppp; | |
644 | ppp->ptr = p; | |
645 | ||
646 | /* Now scan up the ancestry, checking for duplicates at each generation. */ | |
647 | ||
648 | for (pp = p;; pp = pp->parent) | |
649 | { | |
650 | address_item *dup; | |
ff5aac2b JH |
651 | for (dup = addr_duplicate; dup; dup = dup->next) |
652 | if (dup->dupof == pp) /* a dup of our address */ | |
42055a33 | 653 | if (!write_env_to(dup, pplist, pdlist, first, tctx)) |
ff5aac2b JH |
654 | return FALSE; |
655 | if (!pp->parent) break; | |
059ec3d9 PH |
656 | } |
657 | ||
658 | /* Check to see if we have already output the progenitor. */ | |
659 | ||
ff5aac2b JH |
660 | for (ppp = *pplist; ppp; ppp = ppp->next) if (pp == ppp->ptr) break; |
661 | if (ppp) return TRUE; | |
059ec3d9 PH |
662 | |
663 | /* Remember what we have output, and output it. */ | |
664 | ||
665 | ppp = store_get(sizeof(struct aci)); | |
666 | ppp->next = *pplist; | |
667 | *pplist = ppp; | |
668 | ppp->ptr = pp; | |
669 | ||
42055a33 | 670 | if (!*first && !write_chunk(tctx, US",\n ", 3)) return FALSE; |
059ec3d9 | 671 | *first = FALSE; |
42055a33 | 672 | return write_chunk(tctx, pp->address, Ustrlen(pp->address)); |
059ec3d9 PH |
673 | } |
674 | ||
675 | ||
676 | ||
677 | ||
4c04137d | 678 | /* Add/remove/rewrite headers, and send them plus the empty-line separator. |
511a6c14 JH |
679 | |
680 | Globals: | |
681 | header_list | |
682 | ||
683 | Arguments: | |
684 | addr (chain of) addresses (for extra headers), or NULL; | |
685 | only the first address is used | |
44bc8f0c | 686 | tctx transport context |
59932f7d | 687 | sendfn function for output (transport or verify) |
511a6c14 JH |
688 | |
689 | Returns: TRUE on success; FALSE on failure. | |
690 | */ | |
691 | BOOL | |
42055a33 JH |
692 | transport_headers_send(transport_ctx * tctx, |
693 | BOOL (*sendfn)(transport_ctx * tctx, uschar * s, int len)) | |
511a6c14 | 694 | { |
6b46ecc6 | 695 | const uschar *list; |
6d5c916c JH |
696 | transport_instance * tblock = tctx ? tctx->tblock : NULL; |
697 | address_item * addr = tctx ? tctx->addr : NULL; | |
511a6c14 JH |
698 | |
699 | /* Then the message's headers. Don't write any that are flagged as "old"; | |
700 | that means they were rewritten, or are a record of envelope rewriting, or | |
701 | were removed (e.g. Bcc). If remove_headers is not null, skip any headers that | |
76146973 JH |
702 | match any entries therein. It is a colon-sep list; expand the items |
703 | separately and squash any empty ones. | |
d43cbe25 | 704 | Then check addr->prop.remove_headers too, provided that addr is not NULL. */ |
511a6c14 | 705 | |
d7978c0f | 706 | for (header_line * h = header_list; h; h = h->next) if (h->type != htype_old) |
511a6c14 | 707 | { |
511a6c14 JH |
708 | BOOL include_header = TRUE; |
709 | ||
fb6833e0 | 710 | list = tblock ? tblock->remove_headers : NULL; |
d7978c0f | 711 | for (int i = 0; i < 2; i++) /* For remove_headers && addr->prop.remove_headers */ |
511a6c14 JH |
712 | { |
713 | if (list) | |
714 | { | |
715 | int sep = ':'; /* This is specified as a colon-separated list */ | |
716 | uschar *s, *ss; | |
8bc732e8 | 717 | while ((s = string_nextinlist(&list, &sep, NULL, 0))) |
511a6c14 | 718 | { |
76146973 JH |
719 | int len; |
720 | ||
721 | if (i == 0) | |
8768d548 | 722 | if (!(s = expand_string(s)) && !f.expand_string_forcedfail) |
76146973 JH |
723 | { |
724 | errno = ERRNO_CHHEADER_FAIL; | |
725 | return FALSE; | |
726 | } | |
d4ff61d1 | 727 | len = s ? Ustrlen(s) : 0; |
511a6c14 JH |
728 | if (strncmpic(h->text, s, len) != 0) continue; |
729 | ss = h->text + len; | |
730 | while (*ss == ' ' || *ss == '\t') ss++; | |
731 | if (*ss == ':') break; | |
732 | } | |
6b46ecc6 | 733 | if (s) { include_header = FALSE; break; } |
511a6c14 | 734 | } |
6b46ecc6 | 735 | if (addr) list = addr->prop.remove_headers; |
511a6c14 JH |
736 | } |
737 | ||
738 | /* If this header is to be output, try to rewrite it if there are rewriting | |
739 | rules. */ | |
740 | ||
741 | if (include_header) | |
742 | { | |
fb6833e0 | 743 | if (tblock && tblock->rewrite_rules) |
511a6c14 JH |
744 | { |
745 | void *reset_point = store_get(0); | |
746 | header_line *hh; | |
747 | ||
6b46ecc6 JH |
748 | if ((hh = rewrite_header(h, NULL, NULL, tblock->rewrite_rules, |
749 | tblock->rewrite_existflags, FALSE))) | |
511a6c14 | 750 | { |
42055a33 | 751 | if (!sendfn(tctx, hh->text, hh->slen)) return FALSE; |
511a6c14 JH |
752 | store_reset(reset_point); |
753 | continue; /* With the next header line */ | |
754 | } | |
755 | } | |
756 | ||
757 | /* Either no rewriting rules, or it didn't get rewritten */ | |
758 | ||
42055a33 | 759 | if (!sendfn(tctx, h->text, h->slen)) return FALSE; |
511a6c14 JH |
760 | } |
761 | ||
762 | /* Header removed */ | |
763 | ||
764 | else | |
511a6c14 | 765 | DEBUG(D_transport) debug_printf("removed header line:\n%s---\n", h->text); |
511a6c14 JH |
766 | } |
767 | ||
768 | /* Add on any address-specific headers. If there are multiple addresses, | |
769 | they will all have the same headers in order to be batched. The headers | |
770 | are chained in reverse order of adding (so several addresses from the | |
771 | same alias might share some of them) but we want to output them in the | |
772 | opposite order. This is a bit tedious, but there shouldn't be very many | |
773 | of them. We just walk the list twice, reversing the pointers each time, | |
774 | but on the second time, write out the items. | |
775 | ||
776 | Headers added to an address by a router are guaranteed to end with a newline. | |
777 | */ | |
778 | ||
779 | if (addr) | |
780 | { | |
d43cbe25 | 781 | header_line *hprev = addr->prop.extra_headers; |
d7978c0f JH |
782 | header_line *hnext, * h; |
783 | for (int i = 0; i < 2; i++) | |
ff5aac2b | 784 | for (h = hprev, hprev = NULL; h; h = hnext) |
511a6c14 JH |
785 | { |
786 | hnext = h->next; | |
787 | h->next = hprev; | |
788 | hprev = h; | |
789 | if (i == 1) | |
790 | { | |
42055a33 | 791 | if (!sendfn(tctx, h->text, h->slen)) return FALSE; |
511a6c14 JH |
792 | DEBUG(D_transport) |
793 | debug_printf("added header line(s):\n%s---\n", h->text); | |
794 | } | |
795 | } | |
511a6c14 JH |
796 | } |
797 | ||
76146973 JH |
798 | /* If a string containing additional headers exists it is a newline-sep |
799 | list. Expand each item and write out the result. This is done last so that | |
800 | if it (deliberately or accidentally) isn't in header format, it won't mess | |
801 | up any other headers. An empty string or a forced expansion failure are | |
802 | noops. An added header string from a transport may not end with a newline; | |
803 | add one if it does not. */ | |
511a6c14 | 804 | |
fb6833e0 | 805 | if (tblock && (list = CUS tblock->add_headers)) |
511a6c14 | 806 | { |
76146973 JH |
807 | int sep = '\n'; |
808 | uschar * s; | |
809 | ||
6b46ecc6 | 810 | while ((s = string_nextinlist(&list, &sep, NULL, 0))) |
ff5aac2b | 811 | if ((s = expand_string(s))) |
76146973 JH |
812 | { |
813 | int len = Ustrlen(s); | |
814 | if (len > 0) | |
511a6c14 | 815 | { |
42055a33 JH |
816 | if (!sendfn(tctx, s, len)) return FALSE; |
817 | if (s[len-1] != '\n' && !sendfn(tctx, US"\n", 1)) | |
76146973 JH |
818 | return FALSE; |
819 | DEBUG(D_transport) | |
820 | { | |
821 | debug_printf("added header line:\n%s", s); | |
822 | if (s[len-1] != '\n') debug_printf("\n"); | |
823 | debug_printf("---\n"); | |
824 | } | |
511a6c14 JH |
825 | } |
826 | } | |
8768d548 | 827 | else if (!f.expand_string_forcedfail) |
ff5aac2b | 828 | { errno = ERRNO_CHHEADER_FAIL; return FALSE; } |
511a6c14 JH |
829 | } |
830 | ||
831 | /* Separate headers from body with a blank line */ | |
832 | ||
42055a33 | 833 | return sendfn(tctx, US"\n", 1); |
511a6c14 JH |
834 | } |
835 | ||
836 | ||
059ec3d9 PH |
837 | /************************************************* |
838 | * Write the message * | |
839 | *************************************************/ | |
840 | ||
841 | /* This function writes the message to the given file descriptor. The headers | |
842 | are in the in-store data structure, and the rest of the message is in the open | |
843 | file descriptor deliver_datafile. Make sure we start it at the beginning. | |
844 | ||
845 | . If add_return_path is TRUE, a "return-path:" header is added to the message, | |
846 | containing the envelope sender's address. | |
847 | ||
848 | . If add_envelope_to is TRUE, a "envelope-to:" header is added to the message, | |
849 | giving the top-level envelope address that caused this delivery to happen. | |
850 | ||
851 | . If add_delivery_date is TRUE, a "delivery-date:" header is added to the | |
852 | message. It gives the time and date that delivery took place. | |
853 | ||
854 | . If check_string is not null, the start of each line is checked for that | |
855 | string. If it is found, it is replaced by escape_string. This used to be | |
856 | the "from hack" for files, and "smtp_dots" for escaping SMTP dots. | |
857 | ||
858 | . If use_crlf is true, newlines are turned into CRLF (SMTP output). | |
859 | ||
860 | The yield is TRUE if all went well, and FALSE if not. Exit *immediately* after | |
861 | any writing or reading error, leaving the code in errno intact. Error exits | |
862 | can include timeouts for certain transports, which are requested by setting | |
863 | transport_write_timeout non-zero. | |
864 | ||
865 | Arguments: | |
6b46ecc6 | 866 | tctx |
42055a33 JH |
867 | (fd, msg) Either and fd, to write the message to, |
868 | or a string: if null write message to allocated space | |
869 | otherwire take content as headers. | |
6b46ecc6 JH |
870 | addr (chain of) addresses (for extra headers), or NULL; |
871 | only the first address is used | |
872 | tblock optional transport instance block (NULL signifies NULL/0): | |
873 | add_headers a string containing one or more headers to add; it is | |
874 | expanded, and must be in correct RFC 822 format as | |
875 | it is transmitted verbatim; NULL => no additions, | |
876 | and so does empty string or forced expansion fail | |
877 | remove_headers a colon-separated list of headers to remove, or NULL | |
878 | rewrite_rules chain of header rewriting rules | |
879 | rewrite_existflags flags for the rewriting rules | |
880 | options bit-wise options: | |
881 | add_return_path if TRUE, add a "return-path" header | |
882 | add_envelope_to if TRUE, add a "envelope-to" header | |
883 | add_delivery_date if TRUE, add a "delivery-date" header | |
884 | use_crlf if TRUE, turn NL into CR LF | |
885 | end_dot if TRUE, send a terminating "." line at the end | |
886 | no_headers if TRUE, omit the headers | |
887 | no_body if TRUE, omit the body | |
2d14f397 JH |
888 | check_string a string to check for at the start of lines, or NULL |
889 | escape_string a string to insert in front of any check string | |
890 | size_limit if > 0, this is a limit to the size of message written; | |
6b46ecc6 JH |
891 | it is used when returning messages to their senders, |
892 | and is approximate rather than exact, owing to chunk | |
893 | buffering | |
059ec3d9 PH |
894 | |
895 | Returns: TRUE on success; FALSE (with errno) on failure. | |
896 | In addition, the global variable transport_count | |
897 | is incremented by the number of bytes written. | |
898 | */ | |
899 | ||
d315eda1 | 900 | static BOOL |
42055a33 | 901 | internal_transport_write_message(transport_ctx * tctx, int size_limit) |
059ec3d9 | 902 | { |
328c5688 | 903 | int len, size = 0; |
059ec3d9 PH |
904 | |
905 | /* Initialize pointer in output buffer. */ | |
906 | ||
42055a33 | 907 | transport_write_reset(tctx->options); |
059ec3d9 PH |
908 | |
909 | /* Set up the data for start-of-line data checking and escaping */ | |
910 | ||
6b46ecc6 | 911 | if (tctx->check_string && tctx->escape_string) |
059ec3d9 | 912 | { |
6b46ecc6 | 913 | nl_check = tctx->check_string; |
059ec3d9 | 914 | nl_check_length = Ustrlen(nl_check); |
6b46ecc6 | 915 | nl_escape = tctx->escape_string; |
059ec3d9 PH |
916 | nl_escape_length = Ustrlen(nl_escape); |
917 | } | |
059ec3d9 | 918 | |
328c5688 JH |
919 | /* Whether the escaping mechanism is applied to headers or not is controlled by |
920 | an option (set for SMTP, not otherwise). Negate the length if not wanted till | |
921 | after the headers. */ | |
922 | ||
923 | if (!(tctx->options & topt_escape_headers)) | |
924 | nl_check_length = -nl_check_length; | |
925 | ||
059ec3d9 | 926 | /* Write the headers if required, including any that have to be added. If there |
328c5688 JH |
927 | are header rewriting rules, apply them. The datasource is not the -D spoolfile |
928 | so temporarily hide the global that adjusts for its format. */ | |
059ec3d9 | 929 | |
6b46ecc6 | 930 | if (!(tctx->options & topt_no_headers)) |
059ec3d9 | 931 | { |
8768d548 JH |
932 | BOOL save_wireformat = f.spool_file_wireformat; |
933 | f.spool_file_wireformat = FALSE; | |
42055a33 | 934 | |
059ec3d9 PH |
935 | /* Add return-path: if requested. */ |
936 | ||
6b46ecc6 | 937 | if (tctx->options & topt_add_return_path) |
059ec3d9 PH |
938 | { |
939 | uschar buffer[ADDRESS_MAXLENGTH + 20]; | |
ff5aac2b | 940 | int n = sprintf(CS buffer, "Return-path: <%.*s>\n", ADDRESS_MAXLENGTH, |
059ec3d9 | 941 | return_path); |
328c5688 | 942 | if (!write_chunk(tctx, buffer, n)) goto bad; |
059ec3d9 PH |
943 | } |
944 | ||
945 | /* Add envelope-to: if requested */ | |
946 | ||
6b46ecc6 | 947 | if (tctx->options & topt_add_envelope_to) |
059ec3d9 PH |
948 | { |
949 | BOOL first = TRUE; | |
059ec3d9 PH |
950 | struct aci *plist = NULL; |
951 | struct aci *dlist = NULL; | |
952 | void *reset_point = store_get(0); | |
953 | ||
328c5688 | 954 | if (!write_chunk(tctx, US"Envelope-to: ", 13)) goto bad; |
059ec3d9 PH |
955 | |
956 | /* Pick up from all the addresses. The plist and dlist variables are | |
957 | anchors for lists of addresses already handled; they have to be defined at | |
4c04137d | 958 | this level because write_env_to() calls itself recursively. */ |
059ec3d9 | 959 | |
d7978c0f JH |
960 | for (address_item * p = tctx->addr; p; p = p->next) |
961 | if (!write_env_to(p, &plist, &dlist, &first, tctx)) | |
962 | goto bad; | |
059ec3d9 PH |
963 | |
964 | /* Add a final newline and reset the store used for tracking duplicates */ | |
965 | ||
328c5688 | 966 | if (!write_chunk(tctx, US"\n", 1)) goto bad; |
059ec3d9 PH |
967 | store_reset(reset_point); |
968 | } | |
969 | ||
970 | /* Add delivery-date: if requested. */ | |
971 | ||
6b46ecc6 | 972 | if (tctx->options & topt_add_delivery_date) |
059ec3d9 | 973 | { |
a5ffa9b4 JH |
974 | uschar * s = tod_stamp(tod_full); |
975 | ||
976 | if ( !write_chunk(tctx, US"Delivery-date: ", 15) | |
977 | || !write_chunk(tctx, s, Ustrlen(s)) | |
978 | || !write_chunk(tctx, US"\n", 1)) goto bad; | |
059ec3d9 PH |
979 | } |
980 | ||
981 | /* Then the message's headers. Don't write any that are flagged as "old"; | |
982 | that means they were rewritten, or are a record of envelope rewriting, or | |
983 | were removed (e.g. Bcc). If remove_headers is not null, skip any headers that | |
d43cbe25 | 984 | match any entries therein. Then check addr->prop.remove_headers too, provided that |
059ec3d9 | 985 | addr is not NULL. */ |
6b46ecc6 | 986 | |
42055a33 | 987 | if (!transport_headers_send(tctx, &write_chunk)) |
328c5688 JH |
988 | { |
989 | bad: | |
8768d548 | 990 | f.spool_file_wireformat = save_wireformat; |
511a6c14 | 991 | return FALSE; |
328c5688 JH |
992 | } |
993 | ||
8768d548 | 994 | f.spool_file_wireformat = save_wireformat; |
059ec3d9 PH |
995 | } |
996 | ||
58fc5fb2 JH |
997 | /* When doing RFC3030 CHUNKING output, work out how much data would be in a |
998 | last-BDAT, consisting of the current write_chunk() output buffer fill | |
59932f7d JH |
999 | (optimally, all of the headers - but it does not matter if we already had to |
1000 | flush that buffer with non-last BDAT prependix) plus the amount of body data | |
58fc5fb2 | 1001 | (as expanded for CRLF lines). Then create and write BDAT(s), and ensure |
e027f545 JH |
1002 | that further use of write_chunk() will not prepend BDATs. |
1003 | The first BDAT written will also first flush any outstanding MAIL and RCPT | |
1004 | commands which were buffered thans to PIPELINING. | |
1005 | Commands go out (using a send()) from a different buffer to data (using a | |
1006 | write()). They might not end up in the same TCP segment, which is | |
1007 | suboptimal. */ | |
59932f7d | 1008 | |
65de12cc | 1009 | if (tctx->options & topt_use_bdat) |
59932f7d | 1010 | { |
e027f545 | 1011 | off_t fsize; |
328c5688 | 1012 | int hsize; |
e027f545 JH |
1013 | |
1014 | if ((hsize = chunk_ptr - deliver_out_buffer) < 0) | |
1015 | hsize = 0; | |
65de12cc | 1016 | if (!(tctx->options & topt_no_body)) |
59932f7d JH |
1017 | { |
1018 | if ((fsize = lseek(deliver_datafile, 0, SEEK_END)) < 0) return FALSE; | |
1019 | fsize -= SPOOL_DATA_START_OFFSET; | |
1020 | if (size_limit > 0 && fsize > size_limit) | |
1021 | fsize = size_limit; | |
e027f545 | 1022 | size = hsize + fsize; |
8768d548 | 1023 | if (tctx->options & topt_use_crlf && !f.spool_file_wireformat) |
59932f7d | 1024 | size += body_linecount; /* account for CRLF-expansion */ |
42055a33 JH |
1025 | |
1026 | /* With topt_use_bdat we never do dot-stuffing; no need to | |
1027 | account for any expansion due to that. */ | |
59932f7d JH |
1028 | } |
1029 | ||
e027f545 JH |
1030 | /* If the message is large, emit first a non-LAST chunk with just the |
1031 | headers, and reap the command responses. This lets us error out early | |
1032 | on RCPT rejects rather than sending megabytes of data. Include headers | |
1033 | on the assumption they are cheap enough and some clever implementations | |
1034 | might errorcheck them too, on-the-fly, and reject that chunk. */ | |
1035 | ||
1036 | if (size > DELIVER_OUT_BUFFER_SIZE && hsize > 0) | |
1037 | { | |
58fc5fb2 | 1038 | DEBUG(D_transport) |
4c04137d | 1039 | debug_printf("sending small initial BDAT; hsize=%d\n", hsize); |
d2aa036b | 1040 | if ( tctx->chunk_cb(tctx, hsize, 0) != OK |
42055a33 | 1041 | || !transport_write_block(tctx, deliver_out_buffer, hsize, FALSE) |
d2aa036b | 1042 | || tctx->chunk_cb(tctx, 0, tc_reap_prev) != OK |
e027f545 JH |
1043 | ) |
1044 | return FALSE; | |
1045 | chunk_ptr = deliver_out_buffer; | |
1046 | size -= hsize; | |
1047 | } | |
1048 | ||
d2aa036b JH |
1049 | /* Emit a LAST datachunk command, and unmark the context for further |
1050 | BDAT commands. */ | |
59932f7d | 1051 | |
d2aa036b | 1052 | if (tctx->chunk_cb(tctx, size, tc_chunk_last) != OK) |
511a6c14 | 1053 | return FALSE; |
6d5c916c | 1054 | tctx->options &= ~topt_use_bdat; |
059ec3d9 PH |
1055 | } |
1056 | ||
1057 | /* If the body is required, ensure that the data for check strings (formerly | |
1058 | the "from hack") is enabled by negating the length if necessary. (It will be | |
1059 | negative in cases where it isn't to apply to the headers). Then ensure the body | |
1060 | is positioned at the start of its file (following the message id), then write | |
1061 | it, applying the size limit if required. */ | |
1062 | ||
328c5688 JH |
1063 | /* If we have a wireformat -D file (CRNL lines, non-dotstuffed, no ending dot) |
1064 | and we want to send a body without dotstuffing or ending-dot, in-clear, | |
1065 | then we can just dump it using sendfile. | |
1066 | This should get used for CHUNKING output and also for writing the -K file for | |
1067 | dkim signing, when we had CHUNKING input. */ | |
1068 | ||
7d758a6a | 1069 | #ifdef OS_SENDFILE |
8768d548 | 1070 | if ( f.spool_file_wireformat |
328c5688 JH |
1071 | && !(tctx->options & (topt_no_body | topt_end_dot)) |
1072 | && !nl_check_length | |
74f1a423 | 1073 | && tls_out.active.sock != tctx->u.fd |
328c5688 JH |
1074 | ) |
1075 | { | |
1076 | ssize_t copied = 0; | |
1077 | off_t offset = SPOOL_DATA_START_OFFSET; | |
1078 | ||
1079 | /* Write out any header data in the buffer */ | |
1080 | ||
1081 | if ((len = chunk_ptr - deliver_out_buffer) > 0) | |
1082 | { | |
1083 | if (!transport_write_block(tctx, deliver_out_buffer, len, TRUE)) | |
1084 | return FALSE; | |
1085 | size -= len; | |
1086 | } | |
1087 | ||
1088 | DEBUG(D_transport) debug_printf("using sendfile for body\n"); | |
1089 | ||
1090 | while(size > 0) | |
1091 | { | |
7d758a6a | 1092 | if ((copied = os_sendfile(tctx->u.fd, deliver_datafile, &offset, size)) <= 0) break; |
328c5688 JH |
1093 | size -= copied; |
1094 | } | |
1095 | return copied >= 0; | |
1096 | } | |
1097 | #else | |
1098 | DEBUG(D_transport) debug_printf("cannot use sendfile for body: no support\n"); | |
1099 | #endif | |
1100 | ||
1101 | DEBUG(D_transport) | |
1102 | if (!(tctx->options & topt_no_body)) | |
1103 | debug_printf("cannot use sendfile for body: %s\n", | |
8768d548 | 1104 | !f.spool_file_wireformat ? "spoolfile not wireformat" |
328c5688 JH |
1105 | : tctx->options & topt_end_dot ? "terminating dot wanted" |
1106 | : nl_check_length ? "dot- or From-stuffing wanted" | |
1107 | : "TLS output wanted"); | |
1108 | ||
6b46ecc6 | 1109 | if (!(tctx->options & topt_no_body)) |
059ec3d9 | 1110 | { |
05bf16f6 | 1111 | unsigned long size = size_limit > 0 ? size_limit : ULONG_MAX; |
e027f545 | 1112 | |
059ec3d9 PH |
1113 | nl_check_length = abs(nl_check_length); |
1114 | nl_partial_match = 0; | |
d4ff61d1 JH |
1115 | if (lseek(deliver_datafile, SPOOL_DATA_START_OFFSET, SEEK_SET) < 0) |
1116 | return FALSE; | |
05bf16f6 | 1117 | while ( (len = MIN(DELIVER_IN_BUFFER_SIZE, size)) > 0 |
59932f7d | 1118 | && (len = read(deliver_datafile, deliver_in_buffer, len)) > 0) |
059ec3d9 | 1119 | { |
42055a33 | 1120 | if (!write_chunk(tctx, deliver_in_buffer, len)) |
59932f7d | 1121 | return FALSE; |
e027f545 | 1122 | size -= len; |
059ec3d9 PH |
1123 | } |
1124 | ||
059ec3d9 PH |
1125 | /* A read error on the body will have left len == -1 and errno set. */ |
1126 | ||
1127 | if (len != 0) return FALSE; | |
c0940526 | 1128 | } |
059ec3d9 | 1129 | |
f64e8b5f | 1130 | /* Finished with the check string, and spool-format consideration */ |
059ec3d9 | 1131 | |
c0940526 | 1132 | nl_check_length = nl_escape_length = 0; |
8768d548 | 1133 | f.spool_file_wireformat = FALSE; |
c0940526 PP |
1134 | |
1135 | /* If requested, add a terminating "." line (SMTP output). */ | |
1136 | ||
42055a33 | 1137 | if (tctx->options & topt_end_dot && !write_chunk(tctx, US".\n", 2)) |
c0940526 | 1138 | return FALSE; |
059ec3d9 PH |
1139 | |
1140 | /* Write out any remaining data in the buffer before returning. */ | |
1141 | ||
1142 | return (len = chunk_ptr - deliver_out_buffer) <= 0 || | |
42055a33 | 1143 | transport_write_block(tctx, deliver_out_buffer, len, FALSE); |
f7572e5a | 1144 | } |
80a47a2c | 1145 | |
f7572e5a TK |
1146 | |
1147 | ||
328c5688 | 1148 | |
059ec3d9 PH |
1149 | /************************************************* |
1150 | * External interface to write the message * | |
1151 | *************************************************/ | |
1152 | ||
1153 | /* If there is no filtering required, call the internal function above to do | |
1154 | the real work, passing over all the arguments from this function. Otherwise, | |
1155 | set up a filtering process, fork another process to call the internal function | |
1156 | to write to the filter, and in this process just suck from the filter and write | |
42055a33 JH |
1157 | down the fd in the transport context. At the end, tidy up the pipes and the |
1158 | processes. | |
059ec3d9 PH |
1159 | |
1160 | Arguments: as for internal_transport_write_message() above | |
1161 | ||
1162 | Returns: TRUE on success; FALSE (with errno) for any failure | |
1163 | transport_count is incremented by the number of bytes written | |
1164 | */ | |
1165 | ||
1166 | BOOL | |
42055a33 | 1167 | transport_write_message(transport_ctx * tctx, int size_limit) |
059ec3d9 | 1168 | { |
059ec3d9 | 1169 | BOOL last_filter_was_NL = TRUE; |
8768d548 | 1170 | BOOL save_spool_file_wireformat = f.spool_file_wireformat; |
059ec3d9 | 1171 | int rc, len, yield, fd_read, fd_write, save_errno; |
806c3df9 | 1172 | int pfd[2] = {-1, -1}; |
059ec3d9 | 1173 | pid_t filter_pid, write_pid; |
6b46ecc6 | 1174 | |
8768d548 | 1175 | f.transport_filter_timed_out = FALSE; |
2e2a30b4 | 1176 | |
059ec3d9 PH |
1177 | /* If there is no filter command set up, call the internal function that does |
1178 | the actual work, passing it the incoming fd, and return its result. */ | |
1179 | ||
6ff55e50 JH |
1180 | if ( !transport_filter_argv |
1181 | || !*transport_filter_argv | |
1182 | || !**transport_filter_argv | |
1183 | ) | |
42055a33 | 1184 | return internal_transport_write_message(tctx, size_limit); |
059ec3d9 PH |
1185 | |
1186 | /* Otherwise the message must be written to a filter process and read back | |
1187 | before being written to the incoming fd. First set up the special processing to | |
1188 | be done during the copying. */ | |
1189 | ||
059ec3d9 PH |
1190 | nl_partial_match = -1; |
1191 | ||
6b46ecc6 | 1192 | if (tctx->check_string && tctx->escape_string) |
059ec3d9 | 1193 | { |
6b46ecc6 | 1194 | nl_check = tctx->check_string; |
059ec3d9 | 1195 | nl_check_length = Ustrlen(nl_check); |
6b46ecc6 | 1196 | nl_escape = tctx->escape_string; |
059ec3d9 PH |
1197 | nl_escape_length = Ustrlen(nl_escape); |
1198 | } | |
1199 | else nl_check_length = nl_escape_length = 0; | |
1200 | ||
1201 | /* Start up a subprocess to run the command. Ensure that our main fd will | |
1202 | be closed when the subprocess execs, but remove the flag afterwards. | |
1203 | (Otherwise, if this is a TCP/IP socket, it can't get passed on to another | |
1204 | process to deliver another message.) We get back stdin/stdout file descriptors. | |
1205 | If the process creation failed, give an error return. */ | |
1206 | ||
1207 | fd_read = -1; | |
1208 | fd_write = -1; | |
1209 | save_errno = 0; | |
1210 | yield = FALSE; | |
1211 | write_pid = (pid_t)(-1); | |
1212 | ||
92b0827a | 1213 | { |
42055a33 JH |
1214 | int bits = fcntl(tctx->u.fd, F_GETFD); |
1215 | (void)fcntl(tctx->u.fd, F_SETFD, bits | FD_CLOEXEC); | |
92b0827a JH |
1216 | filter_pid = child_open(USS transport_filter_argv, NULL, 077, |
1217 | &fd_write, &fd_read, FALSE); | |
42055a33 | 1218 | (void)fcntl(tctx->u.fd, F_SETFD, bits & ~FD_CLOEXEC); |
92b0827a | 1219 | } |
059ec3d9 PH |
1220 | if (filter_pid < 0) goto TIDY_UP; /* errno set */ |
1221 | ||
1222 | DEBUG(D_transport) | |
fb6833e0 | 1223 | debug_printf("process %d running as transport filter: fd_write=%d fd_read=%d\n", |
059ec3d9 PH |
1224 | (int)filter_pid, fd_write, fd_read); |
1225 | ||
1226 | /* Fork subprocess to write the message to the filter, and return the result | |
1227 | via a(nother) pipe. While writing to the filter, we do not do the CRLF, | |
1228 | smtp dots, or check string processing. */ | |
1229 | ||
1230 | if (pipe(pfd) != 0) goto TIDY_UP; /* errno set */ | |
1231 | if ((write_pid = fork()) == 0) | |
1232 | { | |
1233 | BOOL rc; | |
f1e894f3 PH |
1234 | (void)close(fd_read); |
1235 | (void)close(pfd[pipe_read]); | |
059ec3d9 | 1236 | nl_check_length = nl_escape_length = 0; |
6b46ecc6 | 1237 | |
42055a33 | 1238 | tctx->u.fd = fd_write; |
fb6833e0 | 1239 | tctx->check_string = tctx->escape_string = NULL; |
65de12cc | 1240 | tctx->options &= ~(topt_use_crlf | topt_end_dot | topt_use_bdat); |
6b46ecc6 | 1241 | |
42055a33 | 1242 | rc = internal_transport_write_message(tctx, size_limit); |
6b46ecc6 | 1243 | |
059ec3d9 | 1244 | save_errno = errno; |
1ac6b2e7 JH |
1245 | if ( write(pfd[pipe_write], (void *)&rc, sizeof(BOOL)) |
1246 | != sizeof(BOOL) | |
1247 | || write(pfd[pipe_write], (void *)&save_errno, sizeof(int)) | |
1248 | != sizeof(int) | |
6b46ecc6 | 1249 | || write(pfd[pipe_write], (void *)&tctx->addr->more_errno, sizeof(int)) |
1ac6b2e7 | 1250 | != sizeof(int) |
32dfdf8b JH |
1251 | || write(pfd[pipe_write], (void *)&tctx->addr->delivery_usec, sizeof(int)) |
1252 | != sizeof(int) | |
1ac6b2e7 JH |
1253 | ) |
1254 | rc = FALSE; /* compiler quietening */ | |
059ec3d9 PH |
1255 | _exit(0); |
1256 | } | |
1257 | save_errno = errno; | |
1258 | ||
1259 | /* Parent process: close our copy of the writing subprocess' pipes. */ | |
1260 | ||
f1e894f3 PH |
1261 | (void)close(pfd[pipe_write]); |
1262 | (void)close(fd_write); | |
059ec3d9 PH |
1263 | fd_write = -1; |
1264 | ||
1265 | /* Writing process creation failed */ | |
1266 | ||
1267 | if (write_pid < 0) | |
1268 | { | |
1269 | errno = save_errno; /* restore */ | |
1270 | goto TIDY_UP; | |
1271 | } | |
1272 | ||
1273 | /* When testing, let the subprocess get going */ | |
1274 | ||
8768d548 | 1275 | if (f.running_in_test_harness) millisleep(250); |
059ec3d9 PH |
1276 | |
1277 | DEBUG(D_transport) | |
1278 | debug_printf("process %d writing to transport filter\n", (int)write_pid); | |
1279 | ||
1280 | /* Copy the message from the filter to the output fd. A read error leaves len | |
1281 | == -1 and errno set. We need to apply a timeout to the read, to cope with | |
1282 | the case when the filter gets stuck, but it can be quite a long one. The | |
1283 | default is 5m, but this is now configurable. */ | |
1284 | ||
1285 | DEBUG(D_transport) debug_printf("copying from the filter\n"); | |
1286 | ||
1287 | /* Copy the output of the filter, remembering if the last character was NL. If | |
1288 | no data is returned, that counts as "ended with NL" (default setting of the | |
328c5688 JH |
1289 | variable is TRUE). The output should always be unix-format as we converted |
1290 | any wireformat source on writing input to the filter. */ | |
059ec3d9 | 1291 | |
8768d548 | 1292 | f.spool_file_wireformat = FALSE; |
059ec3d9 PH |
1293 | chunk_ptr = deliver_out_buffer; |
1294 | ||
1295 | for (;;) | |
1296 | { | |
1297 | sigalrm_seen = FALSE; | |
c2a1bba0 | 1298 | ALARM(transport_filter_timeout); |
059ec3d9 | 1299 | len = read(fd_read, deliver_in_buffer, DELIVER_IN_BUFFER_SIZE); |
c2a1bba0 | 1300 | ALARM_CLR(0); |
059ec3d9 PH |
1301 | if (sigalrm_seen) |
1302 | { | |
1303 | errno = ETIMEDOUT; | |
8768d548 | 1304 | f.transport_filter_timed_out = TRUE; |
059ec3d9 PH |
1305 | goto TIDY_UP; |
1306 | } | |
1307 | ||
1308 | /* If the read was successful, write the block down the original fd, | |
1309 | remembering whether it ends in \n or not. */ | |
1310 | ||
1311 | if (len > 0) | |
1312 | { | |
42055a33 | 1313 | if (!write_chunk(tctx, deliver_in_buffer, len)) goto TIDY_UP; |
059ec3d9 PH |
1314 | last_filter_was_NL = (deliver_in_buffer[len-1] == '\n'); |
1315 | } | |
1316 | ||
1317 | /* Otherwise, break the loop. If we have hit EOF, set yield = TRUE. */ | |
1318 | ||
1319 | else | |
1320 | { | |
1321 | if (len == 0) yield = TRUE; | |
1322 | break; | |
1323 | } | |
1324 | } | |
1325 | ||
1326 | /* Tidying up code. If yield = FALSE there has been an error and errno is set | |
1327 | to something. Ensure the pipes are all closed and the processes are removed. If | |
1328 | there has been an error, kill the processes before waiting for them, just to be | |
1329 | sure. Also apply a paranoia timeout. */ | |
1330 | ||
1331 | TIDY_UP: | |
8768d548 | 1332 | f.spool_file_wireformat = save_spool_file_wireformat; |
059ec3d9 PH |
1333 | save_errno = errno; |
1334 | ||
f1e894f3 PH |
1335 | (void)close(fd_read); |
1336 | if (fd_write > 0) (void)close(fd_write); | |
059ec3d9 PH |
1337 | |
1338 | if (!yield) | |
1339 | { | |
1340 | if (filter_pid > 0) kill(filter_pid, SIGKILL); | |
1341 | if (write_pid > 0) kill(write_pid, SIGKILL); | |
1342 | } | |
1343 | ||
1344 | /* Wait for the filter process to complete. */ | |
1345 | ||
1346 | DEBUG(D_transport) debug_printf("waiting for filter process\n"); | |
1347 | if (filter_pid > 0 && (rc = child_close(filter_pid, 30)) != 0 && yield) | |
1348 | { | |
1349 | yield = FALSE; | |
1350 | save_errno = ERRNO_FILTER_FAIL; | |
6b46ecc6 | 1351 | tctx->addr->more_errno = rc; |
059ec3d9 PH |
1352 | DEBUG(D_transport) debug_printf("filter process returned %d\n", rc); |
1353 | } | |
1354 | ||
1355 | /* Wait for the writing process to complete. If it ends successfully, | |
8e669ac1 | 1356 | read the results from its pipe, provided we haven't already had a filter |
35af9f61 | 1357 | process failure. */ |
059ec3d9 PH |
1358 | |
1359 | DEBUG(D_transport) debug_printf("waiting for writing process\n"); | |
1360 | if (write_pid > 0) | |
1361 | { | |
35af9f61 PH |
1362 | rc = child_close(write_pid, 30); |
1363 | if (yield) | |
8e669ac1 | 1364 | if (rc == 0) |
35af9f61 PH |
1365 | { |
1366 | BOOL ok; | |
4dc2379a JH |
1367 | if (read(pfd[pipe_read], (void *)&ok, sizeof(BOOL)) != sizeof(BOOL)) |
1368 | { | |
1369 | DEBUG(D_transport) | |
1370 | debug_printf("pipe read from writing process: %s\n", strerror(errno)); | |
1371 | save_errno = ERRNO_FILTER_FAIL; | |
1372 | yield = FALSE; | |
1373 | } | |
1374 | else if (!ok) | |
35af9f61 | 1375 | { |
4dc2379a | 1376 | int dummy = read(pfd[pipe_read], (void *)&save_errno, sizeof(int)); |
32dfdf8b JH |
1377 | dummy = read(pfd[pipe_read], (void *)&tctx->addr->more_errno, sizeof(int)); |
1378 | dummy = read(pfd[pipe_read], (void *)&tctx->addr->delivery_usec, sizeof(int)); | |
cab0c277 | 1379 | dummy = dummy; /* compiler quietening */ |
35af9f61 PH |
1380 | yield = FALSE; |
1381 | } | |
1382 | } | |
1383 | else | |
059ec3d9 | 1384 | { |
059ec3d9 | 1385 | yield = FALSE; |
35af9f61 | 1386 | save_errno = ERRNO_FILTER_FAIL; |
6b46ecc6 | 1387 | tctx->addr->more_errno = rc; |
35af9f61 | 1388 | DEBUG(D_transport) debug_printf("writing process returned %d\n", rc); |
059ec3d9 | 1389 | } |
059ec3d9 | 1390 | } |
f1e894f3 | 1391 | (void)close(pfd[pipe_read]); |
059ec3d9 PH |
1392 | |
1393 | /* If there have been no problems we can now add the terminating "." if this is | |
1394 | SMTP output, turning off escaping beforehand. If the last character from the | |
1395 | filter was not NL, insert a NL to make the SMTP protocol work. */ | |
1396 | ||
1397 | if (yield) | |
1398 | { | |
1399 | nl_check_length = nl_escape_length = 0; | |
8768d548 | 1400 | f.spool_file_wireformat = FALSE; |
6b46ecc6 | 1401 | if ( tctx->options & topt_end_dot |
ff5aac2b | 1402 | && ( last_filter_was_NL |
42055a33 JH |
1403 | ? !write_chunk(tctx, US".\n", 2) |
1404 | : !write_chunk(tctx, US"\n.\n", 3) | |
ff5aac2b | 1405 | ) ) |
059ec3d9 | 1406 | yield = FALSE; |
059ec3d9 PH |
1407 | |
1408 | /* Write out any remaining data in the buffer. */ | |
1409 | ||
1410 | else | |
ff5aac2b | 1411 | yield = (len = chunk_ptr - deliver_out_buffer) <= 0 |
42055a33 | 1412 | || transport_write_block(tctx, deliver_out_buffer, len, FALSE); |
059ec3d9 | 1413 | } |
ff5aac2b JH |
1414 | else |
1415 | errno = save_errno; /* From some earlier error */ | |
059ec3d9 PH |
1416 | |
1417 | DEBUG(D_transport) | |
1418 | { | |
1419 | debug_printf("end of filtering transport writing: yield=%d\n", yield); | |
1420 | if (!yield) | |
6b46ecc6 | 1421 | debug_printf("errno=%d more_errno=%d\n", errno, tctx->addr->more_errno); |
059ec3d9 PH |
1422 | } |
1423 | ||
1424 | return yield; | |
1425 | } | |
1426 | ||
1427 | ||
1428 | ||
1429 | ||
1430 | ||
1431 | /************************************************* | |
1432 | * Update waiting database * | |
1433 | *************************************************/ | |
1434 | ||
1435 | /* This is called when an address is deferred by remote transports that are | |
1436 | capable of sending more than one message over one connection. A database is | |
1437 | maintained for each transport, keeping track of which messages are waiting for | |
1438 | which hosts. The transport can then consult this when eventually a successful | |
1439 | delivery happens, and if it finds that another message is waiting for the same | |
1440 | host, it can fire up a new process to deal with it using the same connection. | |
1441 | ||
1442 | The database records are keyed by host name. They can get full if there are | |
1443 | lots of messages waiting, and so there is a continuation mechanism for them. | |
1444 | ||
1445 | Each record contains a list of message ids, packed end to end without any | |
1446 | zeros. Each one is MESSAGE_ID_LENGTH bytes long. The count field says how many | |
1447 | in this record, and the sequence field says if there are any other records for | |
1448 | this host. If the sequence field is 0, there are none. If it is 1, then another | |
1449 | record with the name <hostname>:0 exists; if it is 2, then two other records | |
1450 | with sequence numbers 0 and 1 exist, and so on. | |
1451 | ||
1452 | Currently, an exhaustive search of all continuation records has to be done to | |
1453 | determine whether to add a message id to a given record. This shouldn't be | |
1454 | too bad except in extreme cases. I can't figure out a *simple* way of doing | |
1455 | better. | |
1456 | ||
1457 | Old records should eventually get swept up by the exim_tidydb utility. | |
1458 | ||
1459 | Arguments: | |
f6c332bd | 1460 | hostlist list of hosts that this message could be sent to |
059ec3d9 PH |
1461 | tpname name of the transport |
1462 | ||
1463 | Returns: nothing | |
1464 | */ | |
1465 | ||
1466 | void | |
1467 | transport_update_waiting(host_item *hostlist, uschar *tpname) | |
1468 | { | |
55414b25 | 1469 | const uschar *prevname = US""; |
059ec3d9 PH |
1470 | open_db dbblock; |
1471 | open_db *dbm_file; | |
1472 | ||
7a0743eb PH |
1473 | DEBUG(D_transport) debug_printf("updating wait-%s database\n", tpname); |
1474 | ||
059ec3d9 PH |
1475 | /* Open the database for this transport */ |
1476 | ||
36d295f1 | 1477 | if (!(dbm_file = dbfn_open(string_sprintf("wait-%.200s", tpname), |
b10c87b3 | 1478 | O_RDWR, &dbblock, TRUE, TRUE))) |
36d295f1 | 1479 | return; |
059ec3d9 PH |
1480 | |
1481 | /* Scan the list of hosts for which this message is waiting, and ensure | |
f6c332bd | 1482 | that the message id is in each host record. */ |
059ec3d9 | 1483 | |
d7978c0f | 1484 | for (host_item * host = hostlist; host; host = host->next) |
059ec3d9 PH |
1485 | { |
1486 | BOOL already = FALSE; | |
1487 | dbdata_wait *host_record; | |
d7978c0f | 1488 | int host_length; |
36d295f1 | 1489 | uschar buffer[256]; |
059ec3d9 | 1490 | |
059ec3d9 PH |
1491 | /* Skip if this is the same host as we just processed; otherwise remember |
1492 | the name for next time. */ | |
1493 | ||
1494 | if (Ustrcmp(prevname, host->name) == 0) continue; | |
1495 | prevname = host->name; | |
1496 | ||
1497 | /* Look up the host record; if there isn't one, make an empty one. */ | |
1498 | ||
36d295f1 | 1499 | if (!(host_record = dbfn_read(dbm_file, host->name))) |
059ec3d9 PH |
1500 | { |
1501 | host_record = store_get(sizeof(dbdata_wait) + MESSAGE_ID_LENGTH); | |
1502 | host_record->count = host_record->sequence = 0; | |
1503 | } | |
1504 | ||
1505 | /* Compute the current length */ | |
1506 | ||
1507 | host_length = host_record->count * MESSAGE_ID_LENGTH; | |
1508 | ||
1509 | /* Search the record to see if the current message is already in it. */ | |
1510 | ||
d7978c0f | 1511 | for (uschar * s = host_record->text; s < host_record->text + host_length; |
059ec3d9 | 1512 | s += MESSAGE_ID_LENGTH) |
059ec3d9 PH |
1513 | if (Ustrncmp(s, message_id, MESSAGE_ID_LENGTH) == 0) |
1514 | { already = TRUE; break; } | |
059ec3d9 PH |
1515 | |
1516 | /* If we haven't found this message in the main record, search any | |
1517 | continuation records that exist. */ | |
1518 | ||
d7978c0f | 1519 | for (int i = host_record->sequence - 1; i >= 0 && !already; i--) |
059ec3d9 PH |
1520 | { |
1521 | dbdata_wait *cont; | |
1522 | sprintf(CS buffer, "%.200s:%d", host->name, i); | |
36d295f1 | 1523 | if ((cont = dbfn_read(dbm_file, buffer))) |
059ec3d9 PH |
1524 | { |
1525 | int clen = cont->count * MESSAGE_ID_LENGTH; | |
d7978c0f | 1526 | for (uschar * s = cont->text; s < cont->text + clen; s += MESSAGE_ID_LENGTH) |
059ec3d9 PH |
1527 | if (Ustrncmp(s, message_id, MESSAGE_ID_LENGTH) == 0) |
1528 | { already = TRUE; break; } | |
059ec3d9 PH |
1529 | } |
1530 | } | |
1531 | ||
1532 | /* If this message is already in a record, no need to update. */ | |
1533 | ||
7a0743eb PH |
1534 | if (already) |
1535 | { | |
1536 | DEBUG(D_transport) debug_printf("already listed for %s\n", host->name); | |
1537 | continue; | |
1538 | } | |
059ec3d9 PH |
1539 | |
1540 | ||
1541 | /* If this record is full, write it out with a new name constructed | |
1542 | from the sequence number, increase the sequence number, and empty | |
1543 | the record. */ | |
1544 | ||
1545 | if (host_record->count >= WAIT_NAME_MAX) | |
1546 | { | |
1547 | sprintf(CS buffer, "%.200s:%d", host->name, host_record->sequence); | |
1548 | dbfn_write(dbm_file, buffer, host_record, sizeof(dbdata_wait) + host_length); | |
1549 | host_record->sequence++; | |
1550 | host_record->count = 0; | |
1551 | host_length = 0; | |
1552 | } | |
1553 | ||
1554 | /* If this record is not full, increase the size of the record to | |
1555 | allow for one new message id. */ | |
1556 | ||
1557 | else | |
1558 | { | |
1559 | dbdata_wait *newr = | |
1560 | store_get(sizeof(dbdata_wait) + host_length + MESSAGE_ID_LENGTH); | |
1561 | memcpy(newr, host_record, sizeof(dbdata_wait) + host_length); | |
1562 | host_record = newr; | |
1563 | } | |
1564 | ||
1565 | /* Now add the new name on the end */ | |
1566 | ||
1567 | memcpy(host_record->text + host_length, message_id, MESSAGE_ID_LENGTH); | |
1568 | host_record->count++; | |
1569 | host_length += MESSAGE_ID_LENGTH; | |
1570 | ||
1571 | /* Update the database */ | |
1572 | ||
1573 | dbfn_write(dbm_file, host->name, host_record, sizeof(dbdata_wait) + host_length); | |
7a0743eb | 1574 | DEBUG(D_transport) debug_printf("added to list for %s\n", host->name); |
059ec3d9 PH |
1575 | } |
1576 | ||
1577 | /* All now done */ | |
1578 | ||
1579 | dbfn_close(dbm_file); | |
1580 | } | |
1581 | ||
1582 | ||
1583 | ||
1584 | ||
1585 | /************************************************* | |
1586 | * Test for waiting messages * | |
1587 | *************************************************/ | |
1588 | ||
1589 | /* This function is called by a remote transport which uses the previous | |
1590 | function to remember which messages are waiting for which remote hosts. It's | |
1591 | called after a successful delivery and its job is to check whether there is | |
1592 | another message waiting for the same host. However, it doesn't do this if the | |
1593 | current continue sequence is greater than the maximum supplied as an argument, | |
1594 | or greater than the global connection_max_messages, which, if set, overrides. | |
1595 | ||
1596 | Arguments: | |
1597 | transport_name name of the transport | |
1598 | hostname name of the host | |
1599 | local_message_max maximum number of messages down one connection | |
1600 | as set by the caller transport | |
1601 | new_message_id set to the message id of a waiting message | |
1602 | more set TRUE if there are yet more messages waiting | |
a39bd74d JB |
1603 | oicf_func function to call to validate if it is ok to send |
1604 | to this message_id from the current instance. | |
1605 | oicf_data opaque data for oicf_func | |
059ec3d9 PH |
1606 | |
1607 | Returns: TRUE if new_message_id set; FALSE otherwise | |
1608 | */ | |
1609 | ||
a39bd74d JB |
1610 | typedef struct msgq_s |
1611 | { | |
1612 | uschar message_id [MESSAGE_ID_LENGTH + 1]; | |
1613 | BOOL bKeep; | |
1614 | } msgq_t; | |
1615 | ||
059ec3d9 | 1616 | BOOL |
55414b25 | 1617 | transport_check_waiting(const uschar *transport_name, const uschar *hostname, |
a39bd74d | 1618 | int local_message_max, uschar *new_message_id, BOOL *more, oicf oicf_func, void *oicf_data) |
059ec3d9 PH |
1619 | { |
1620 | dbdata_wait *host_record; | |
0539a19d | 1621 | int host_length; |
059ec3d9 PH |
1622 | open_db dbblock; |
1623 | open_db *dbm_file; | |
059ec3d9 | 1624 | |
a39bd74d | 1625 | int i; |
a39bd74d | 1626 | struct stat statbuf; |
a39bd74d | 1627 | |
059ec3d9 PH |
1628 | *more = FALSE; |
1629 | ||
1630 | DEBUG(D_transport) | |
1631 | { | |
1632 | debug_printf("transport_check_waiting entered\n"); | |
1633 | debug_printf(" sequence=%d local_max=%d global_max=%d\n", | |
1634 | continue_sequence, local_message_max, connection_max_messages); | |
1635 | } | |
1636 | ||
1637 | /* Do nothing if we have hit the maximum number that can be send down one | |
1638 | connection. */ | |
1639 | ||
1640 | if (connection_max_messages >= 0) local_message_max = connection_max_messages; | |
1641 | if (local_message_max > 0 && continue_sequence >= local_message_max) | |
1642 | { | |
1643 | DEBUG(D_transport) | |
1644 | debug_printf("max messages for one connection reached: returning\n"); | |
1645 | return FALSE; | |
1646 | } | |
1647 | ||
1648 | /* Open the waiting information database. */ | |
1649 | ||
36d295f1 | 1650 | if (!(dbm_file = dbfn_open(string_sprintf("wait-%.200s", transport_name), |
b10c87b3 | 1651 | O_RDWR, &dbblock, TRUE, TRUE))) |
36d295f1 | 1652 | return FALSE; |
059ec3d9 PH |
1653 | |
1654 | /* See if there is a record for this host; if not, there's nothing to do. */ | |
1655 | ||
789f8a4f | 1656 | if (!(host_record = dbfn_read(dbm_file, hostname))) |
059ec3d9 PH |
1657 | { |
1658 | dbfn_close(dbm_file); | |
1659 | DEBUG(D_transport) debug_printf("no messages waiting for %s\n", hostname); | |
1660 | return FALSE; | |
1661 | } | |
1662 | ||
1663 | /* If the data in the record looks corrupt, just log something and | |
1664 | don't try to use it. */ | |
1665 | ||
1666 | if (host_record->count > WAIT_NAME_MAX) | |
1667 | { | |
1668 | dbfn_close(dbm_file); | |
1669 | log_write(0, LOG_MAIN|LOG_PANIC, "smtp-wait database entry for %s has bad " | |
1670 | "count=%d (max=%d)", hostname, host_record->count, WAIT_NAME_MAX); | |
1671 | return FALSE; | |
1672 | } | |
1673 | ||
1674 | /* Scan the message ids in the record from the end towards the beginning, | |
1675 | until one is found for which a spool file actually exists. If the record gets | |
1676 | emptied, delete it and continue with any continuation records that may exist. | |
1677 | */ | |
1678 | ||
a39bd74d JB |
1679 | /* For Bug 1141, I refactored this major portion of the routine, it is risky |
1680 | but the 1 off will remain without it. This code now allows me to SKIP over | |
1681 | a message I do not want to send out on this run. */ | |
059ec3d9 | 1682 | |
a39bd74d JB |
1683 | host_length = host_record->count * MESSAGE_ID_LENGTH; |
1684 | ||
1685 | while (1) | |
059ec3d9 | 1686 | { |
789f8a4f JH |
1687 | msgq_t *msgq; |
1688 | int msgq_count = 0; | |
1689 | int msgq_actual = 0; | |
1690 | BOOL bFound = FALSE; | |
1691 | BOOL bContinuation = FALSE; | |
1692 | ||
a39bd74d | 1693 | /* create an array to read entire message queue into memory for processing */ |
059ec3d9 | 1694 | |
40c90bca | 1695 | msgq = store_malloc(sizeof(msgq_t) * host_record->count); |
a39bd74d JB |
1696 | msgq_count = host_record->count; |
1697 | msgq_actual = msgq_count; | |
059ec3d9 | 1698 | |
a39bd74d | 1699 | for (i = 0; i < host_record->count; ++i) |
059ec3d9 | 1700 | { |
a39bd74d JB |
1701 | msgq[i].bKeep = TRUE; |
1702 | ||
1703 | Ustrncpy(msgq[i].message_id, host_record->text + (i * MESSAGE_ID_LENGTH), | |
059ec3d9 | 1704 | MESSAGE_ID_LENGTH); |
a39bd74d JB |
1705 | msgq[i].message_id[MESSAGE_ID_LENGTH] = 0; |
1706 | } | |
1707 | ||
1708 | /* first thing remove current message id if it exists */ | |
059ec3d9 | 1709 | |
a39bd74d JB |
1710 | for (i = 0; i < msgq_count; ++i) |
1711 | if (Ustrcmp(msgq[i].message_id, message_id) == 0) | |
1712 | { | |
1713 | msgq[i].bKeep = FALSE; | |
1714 | break; | |
1715 | } | |
1716 | ||
1717 | /* now find the next acceptable message_id */ | |
1718 | ||
a39bd74d JB |
1719 | for (i = msgq_count - 1; i >= 0; --i) if (msgq[i].bKeep) |
1720 | { | |
41313d92 JH |
1721 | uschar subdir[2]; |
1722 | ||
1723 | subdir[0] = split_spool_directory ? msgq[i].message_id[5] : 0; | |
1724 | subdir[1] = 0; | |
059ec3d9 | 1725 | |
41313d92 JH |
1726 | if (Ustat(spool_fname(US"input", subdir, msgq[i].message_id, US"-D"), |
1727 | &statbuf) != 0) | |
a39bd74d JB |
1728 | msgq[i].bKeep = FALSE; |
1729 | else if (!oicf_func || oicf_func(msgq[i].message_id, oicf_data)) | |
059ec3d9 | 1730 | { |
a39bd74d JB |
1731 | Ustrcpy(new_message_id, msgq[i].message_id); |
1732 | msgq[i].bKeep = FALSE; | |
1733 | bFound = TRUE; | |
059ec3d9 PH |
1734 | break; |
1735 | } | |
1736 | } | |
1737 | ||
a39bd74d JB |
1738 | /* re-count */ |
1739 | for (msgq_actual = 0, i = 0; i < msgq_count; ++i) | |
1740 | if (msgq[i].bKeep) | |
1741 | msgq_actual++; | |
1742 | ||
1743 | /* reassemble the host record, based on removed message ids, from in | |
789f8a4f | 1744 | memory queue */ |
a39bd74d JB |
1745 | |
1746 | if (msgq_actual <= 0) | |
1747 | { | |
1748 | host_length = 0; | |
1749 | host_record->count = 0; | |
1750 | } | |
1751 | else | |
1752 | { | |
1753 | host_length = msgq_actual * MESSAGE_ID_LENGTH; | |
1754 | host_record->count = msgq_actual; | |
1755 | ||
1756 | if (msgq_actual < msgq_count) | |
1757 | { | |
1758 | int new_count; | |
1759 | for (new_count = 0, i = 0; i < msgq_count; ++i) | |
1760 | if (msgq[i].bKeep) | |
1761 | Ustrncpy(&host_record->text[new_count++ * MESSAGE_ID_LENGTH], | |
1762 | msgq[i].message_id, MESSAGE_ID_LENGTH); | |
1763 | ||
1764 | host_record->text[new_count * MESSAGE_ID_LENGTH] = 0; | |
1765 | } | |
1766 | } | |
1767 | ||
36d295f1 | 1768 | /* Check for a continuation record. */ |
a39bd74d | 1769 | |
059ec3d9 PH |
1770 | while (host_length <= 0) |
1771 | { | |
a39bd74d | 1772 | dbdata_wait * newr = NULL; |
36d295f1 | 1773 | uschar buffer[256]; |
059ec3d9 PH |
1774 | |
1775 | /* Search for a continuation */ | |
1776 | ||
d7978c0f | 1777 | for (int i = host_record->sequence - 1; i >= 0 && !newr; i--) |
059ec3d9 PH |
1778 | { |
1779 | sprintf(CS buffer, "%.200s:%d", hostname, i); | |
1780 | newr = dbfn_read(dbm_file, buffer); | |
1781 | } | |
1782 | ||
1783 | /* If no continuation, delete the current and break the loop */ | |
1784 | ||
a39bd74d | 1785 | if (!newr) |
059ec3d9 PH |
1786 | { |
1787 | dbfn_delete(dbm_file, hostname); | |
1788 | break; | |
1789 | } | |
1790 | ||
1791 | /* Else replace the current with the continuation */ | |
1792 | ||
1793 | dbfn_delete(dbm_file, buffer); | |
1794 | host_record = newr; | |
1795 | host_length = host_record->count * MESSAGE_ID_LENGTH; | |
059ec3d9 | 1796 | |
a39bd74d JB |
1797 | bContinuation = TRUE; |
1798 | } | |
059ec3d9 | 1799 | |
789f8a4f JH |
1800 | if (bFound) /* Usual exit from main loop */ |
1801 | { | |
40c90bca | 1802 | store_free (msgq); |
a39bd74d | 1803 | break; |
789f8a4f | 1804 | } |
059ec3d9 PH |
1805 | |
1806 | /* If host_length <= 0 we have emptied a record and not found a good message, | |
1807 | and there are no continuation records. Otherwise there is a continuation | |
1808 | record to process. */ | |
1809 | ||
1810 | if (host_length <= 0) | |
1811 | { | |
1812 | dbfn_close(dbm_file); | |
1813 | DEBUG(D_transport) debug_printf("waiting messages already delivered\n"); | |
1814 | return FALSE; | |
1815 | } | |
a39bd74d JB |
1816 | |
1817 | /* we were not able to find an acceptable message, nor was there a | |
1818 | * continuation record. So bug out, outer logic will clean this up. | |
1819 | */ | |
1820 | ||
1821 | if (!bContinuation) | |
1822 | { | |
789f8a4f | 1823 | Ustrcpy(new_message_id, message_id); |
a39bd74d JB |
1824 | dbfn_close(dbm_file); |
1825 | return FALSE; | |
1826 | } | |
a39bd74d | 1827 | |
40c90bca | 1828 | store_free(msgq); |
789f8a4f | 1829 | } /* we need to process a continuation record */ |
059ec3d9 PH |
1830 | |
1831 | /* Control gets here when an existing message has been encountered; its | |
1832 | id is in new_message_id, and host_length is the revised length of the | |
1833 | host record. If it is zero, the record has been removed. Update the | |
1834 | record if required, close the database, and return TRUE. */ | |
1835 | ||
1836 | if (host_length > 0) | |
1837 | { | |
1838 | host_record->count = host_length/MESSAGE_ID_LENGTH; | |
a39bd74d | 1839 | |
059ec3d9 PH |
1840 | dbfn_write(dbm_file, hostname, host_record, (int)sizeof(dbdata_wait) + host_length); |
1841 | *more = TRUE; | |
1842 | } | |
1843 | ||
1844 | dbfn_close(dbm_file); | |
1845 | return TRUE; | |
1846 | } | |
1847 | ||
059ec3d9 PH |
1848 | /************************************************* |
1849 | * Deliver waiting message down same socket * | |
1850 | *************************************************/ | |
1851 | ||
57cc2785 JH |
1852 | /* Just the regain-root-privilege exec portion */ |
1853 | void | |
1854 | transport_do_pass_socket(const uschar *transport_name, const uschar *hostname, | |
1855 | const uschar *hostaddress, uschar *id, int socket_fd) | |
1856 | { | |
57cc2785 JH |
1857 | int i = 20; |
1858 | const uschar **argv; | |
1859 | ||
1860 | /* Set up the calling arguments; use the standard function for the basics, | |
1861 | but we have a number of extras that may be added. */ | |
1862 | ||
1863 | argv = CUSS child_exec_exim(CEE_RETURN_ARGV, TRUE, &i, FALSE, 0); | |
1864 | ||
8768d548 | 1865 | if (f.smtp_authenticated) argv[i++] = US"-MCA"; |
14de8063 JH |
1866 | if (smtp_peer_options & OPTION_CHUNKING) argv[i++] = US"-MCK"; |
1867 | if (smtp_peer_options & OPTION_DSN) argv[i++] = US"-MCD"; | |
1868 | if (smtp_peer_options & OPTION_PIPE) argv[i++] = US"-MCP"; | |
1869 | if (smtp_peer_options & OPTION_SIZE) argv[i++] = US"-MCS"; | |
01603eec | 1870 | #ifndef DISABLE_TLS |
14de8063 | 1871 | if (smtp_peer_options & OPTION_TLS) |
74f1a423 | 1872 | if (tls_out.active.sock >= 0 || continue_proxy_cipher) |
57cc2785 JH |
1873 | { |
1874 | argv[i++] = US"-MCt"; | |
1875 | argv[i++] = sending_ip_address; | |
1876 | argv[i++] = string_sprintf("%d", sending_port); | |
74f1a423 | 1877 | argv[i++] = tls_out.active.sock >= 0 ? tls_out.cipher : continue_proxy_cipher; |
57cc2785 JH |
1878 | } |
1879 | else | |
1880 | argv[i++] = US"-MCT"; | |
1881 | #endif | |
1882 | ||
1883 | if (queue_run_pid != (pid_t)0) | |
1884 | { | |
1885 | argv[i++] = US"-MCQ"; | |
1886 | argv[i++] = string_sprintf("%d", queue_run_pid); | |
1887 | argv[i++] = string_sprintf("%d", queue_run_pipe); | |
1888 | } | |
1889 | ||
1890 | argv[i++] = US"-MC"; | |
1891 | argv[i++] = US transport_name; | |
1892 | argv[i++] = US hostname; | |
1893 | argv[i++] = US hostaddress; | |
1894 | argv[i++] = string_sprintf("%d", continue_sequence + 1); | |
1895 | argv[i++] = id; | |
1896 | argv[i++] = NULL; | |
1897 | ||
1898 | /* Arrange for the channel to be on stdin. */ | |
1899 | ||
1900 | if (socket_fd != 0) | |
1901 | { | |
1902 | (void)dup2(socket_fd, 0); | |
1903 | (void)close(socket_fd); | |
1904 | } | |
1905 | ||
1906 | DEBUG(D_exec) debug_print_argv(argv); | |
1907 | exim_nullstd(); /* Ensure std{out,err} exist */ | |
1908 | execv(CS argv[0], (char *const *)argv); | |
1909 | ||
1910 | DEBUG(D_any) debug_printf("execv failed: %s\n", strerror(errno)); | |
1911 | _exit(errno); /* Note: must be _exit(), NOT exit() */ | |
1912 | } | |
1913 | ||
1914 | ||
1915 | ||
059ec3d9 PH |
1916 | /* Fork a new exim process to deliver the message, and do a re-exec, both to |
1917 | get a clean delivery process, and to regain root privilege in cases where it | |
1918 | has been given away. | |
1919 | ||
1920 | Arguments: | |
1921 | transport_name to pass to the new process | |
1922 | hostname ditto | |
1923 | hostaddress ditto | |
1924 | id the new message to process | |
1925 | socket_fd the connected socket | |
1926 | ||
1927 | Returns: FALSE if fork fails; TRUE otherwise | |
1928 | */ | |
1929 | ||
1930 | BOOL | |
55414b25 JH |
1931 | transport_pass_socket(const uschar *transport_name, const uschar *hostname, |
1932 | const uschar *hostaddress, uschar *id, int socket_fd) | |
059ec3d9 PH |
1933 | { |
1934 | pid_t pid; | |
1935 | int status; | |
1936 | ||
1937 | DEBUG(D_transport) debug_printf("transport_pass_socket entered\n"); | |
1938 | ||
1939 | if ((pid = fork()) == 0) | |
1940 | { | |
059ec3d9 PH |
1941 | /* Disconnect entirely from the parent process. If we are running in the |
1942 | test harness, wait for a bit to allow the previous process time to finish, | |
1943 | write the log, etc., so that the output is always in the same order for | |
1944 | automatic comparison. */ | |
1945 | ||
b7d3afcf JH |
1946 | if ((pid = fork()) != 0) |
1947 | { | |
1948 | DEBUG(D_transport) debug_printf("transport_pass_socket succeeded (final-pid %d)\n", pid); | |
1949 | _exit(EXIT_SUCCESS); | |
1950 | } | |
8768d548 | 1951 | if (f.running_in_test_harness) sleep(1); |
059ec3d9 | 1952 | |
57cc2785 JH |
1953 | transport_do_pass_socket(transport_name, hostname, hostaddress, |
1954 | id, socket_fd); | |
059ec3d9 PH |
1955 | } |
1956 | ||
1957 | /* If the process creation succeeded, wait for the first-level child, which | |
1958 | immediately exits, leaving the second level process entirely disconnected from | |
1959 | this one. */ | |
1960 | ||
1961 | if (pid > 0) | |
1962 | { | |
1963 | int rc; | |
1964 | while ((rc = wait(&status)) != pid && (rc >= 0 || errno != ECHILD)); | |
b7d3afcf | 1965 | DEBUG(D_transport) debug_printf("transport_pass_socket succeeded (inter-pid %d)\n", pid); |
059ec3d9 PH |
1966 | return TRUE; |
1967 | } | |
1968 | else | |
1969 | { | |
1970 | DEBUG(D_transport) debug_printf("transport_pass_socket failed to fork: %s\n", | |
1971 | strerror(errno)); | |
1972 | return FALSE; | |
1973 | } | |
1974 | } | |
1975 | ||
1976 | ||
1977 | ||
1978 | /************************************************* | |
1979 | * Set up direct (non-shell) command * | |
1980 | *************************************************/ | |
1981 | ||
1982 | /* This function is called when a command line is to be parsed and executed | |
1983 | directly, without the use of /bin/sh. It is called by the pipe transport, | |
1984 | the queryprogram router, and also from the main delivery code when setting up a | |
1985 | transport filter process. The code for ETRN also makes use of this; in that | |
1986 | case, no addresses are passed. | |
1987 | ||
1988 | Arguments: | |
1989 | argvptr pointer to anchor for argv vector | |
55414b25 | 1990 | cmd points to the command string (modified IN PLACE) |
059ec3d9 PH |
1991 | expand_arguments true if expansion is to occur |
1992 | expand_failed error value to set if expansion fails; not relevant if | |
1993 | addr == NULL | |
1994 | addr chain of addresses, or NULL | |
1995 | etext text for use in error messages | |
1996 | errptr where to put error message if addr is NULL; | |
1997 | otherwise it is put in the first address | |
1998 | ||
1999 | Returns: TRUE if all went well; otherwise an error will be | |
2000 | set in the first address and FALSE returned | |
2001 | */ | |
2002 | ||
2003 | BOOL | |
55414b25 JH |
2004 | transport_set_up_command(const uschar ***argvptr, uschar *cmd, |
2005 | BOOL expand_arguments, int expand_failed, address_item *addr, | |
2006 | uschar *etext, uschar **errptr) | |
059ec3d9 | 2007 | { |
55414b25 | 2008 | const uschar **argv; |
059ec3d9 PH |
2009 | uschar *s, *ss; |
2010 | int address_count = 0; | |
2011 | int argcount = 0; | |
d7978c0f | 2012 | int max_args; |
059ec3d9 PH |
2013 | |
2014 | /* Get store in which to build an argument list. Count the number of addresses | |
2015 | supplied, and allow for that many arguments, plus an additional 60, which | |
2016 | should be enough for anybody. Multiple addresses happen only when the local | |
2017 | delivery batch option is set. */ | |
2018 | ||
d7978c0f | 2019 | for (address_item * ad = addr; ad; ad = ad->next) address_count++; |
059ec3d9 PH |
2020 | max_args = address_count + 60; |
2021 | *argvptr = argv = store_get((max_args+1)*sizeof(uschar *)); | |
2022 | ||
2023 | /* Split the command up into arguments terminated by white space. Lose | |
2024 | trailing space at the start and end. Double-quoted arguments can contain \\ and | |
2025 | \" escapes and so can be handled by the standard function; single-quoted | |
2026 | arguments are verbatim. Copy each argument into a new string. */ | |
2027 | ||
2028 | s = cmd; | |
2029 | while (isspace(*s)) s++; | |
2030 | ||
2031 | while (*s != 0 && argcount < max_args) | |
2032 | { | |
2033 | if (*s == '\'') | |
2034 | { | |
2035 | ss = s + 1; | |
2036 | while (*ss != 0 && *ss != '\'') ss++; | |
2037 | argv[argcount++] = ss = store_get(ss - s++); | |
2038 | while (*s != 0 && *s != '\'') *ss++ = *s++; | |
2039 | if (*s != 0) s++; | |
2040 | *ss++ = 0; | |
2041 | } | |
55414b25 | 2042 | else argv[argcount++] = string_copy(string_dequote(CUSS &s)); |
059ec3d9 PH |
2043 | while (isspace(*s)) s++; |
2044 | } | |
2045 | ||
5903c6ff | 2046 | argv[argcount] = US 0; |
059ec3d9 PH |
2047 | |
2048 | /* If *s != 0 we have run out of argument slots. */ | |
2049 | ||
2050 | if (*s != 0) | |
2051 | { | |
2052 | uschar *msg = string_sprintf("Too many arguments in command \"%s\" in " | |
2053 | "%s", cmd, etext); | |
2054 | if (addr != NULL) | |
2055 | { | |
2056 | addr->transport_return = FAIL; | |
2057 | addr->message = msg; | |
2058 | } | |
2059 | else *errptr = msg; | |
2060 | return FALSE; | |
2061 | } | |
2062 | ||
2063 | /* Expand each individual argument if required. Expansion happens for pipes set | |
2064 | up in filter files and with directly-supplied commands. It does not happen if | |
2065 | the pipe comes from a traditional .forward file. A failing expansion is a big | |
2066 | disaster if the command came from Exim's configuration; if it came from a user | |
2067 | it is just a normal failure. The expand_failed value is used as the error value | |
2068 | to cater for these two cases. | |
2069 | ||
2070 | An argument consisting just of the text "$pipe_addresses" is treated specially. | |
2071 | It is not passed to the general expansion function. Instead, it is replaced by | |
2072 | a number of arguments, one for each address. This avoids problems with shell | |
2073 | metacharacters and spaces in addresses. | |
2074 | ||
2075 | If the parent of the top address has an original part of "system-filter", this | |
2076 | pipe was set up by the system filter, and we can permit the expansion of | |
2077 | $recipients. */ | |
2078 | ||
2079 | DEBUG(D_transport) | |
2080 | { | |
2081 | debug_printf("direct command:\n"); | |
d7978c0f | 2082 | for (int i = 0; argv[i] != US 0; i++) |
059ec3d9 PH |
2083 | debug_printf(" argv[%d] = %s\n", i, string_printing(argv[i])); |
2084 | } | |
2085 | ||
2086 | if (expand_arguments) | |
2087 | { | |
2088 | BOOL allow_dollar_recipients = addr != NULL && | |
2089 | addr->parent != NULL && | |
2090 | Ustrcmp(addr->parent->address, "system-filter") == 0; | |
2091 | ||
d7978c0f | 2092 | for (int i = 0; argv[i] != US 0; i++) |
059ec3d9 PH |
2093 | { |
2094 | ||
2095 | /* Handle special fudge for passing an address list */ | |
2096 | ||
2097 | if (addr != NULL && | |
2098 | (Ustrcmp(argv[i], "$pipe_addresses") == 0 || | |
2099 | Ustrcmp(argv[i], "${pipe_addresses}") == 0)) | |
2100 | { | |
2101 | int additional; | |
2102 | ||
2103 | if (argcount + address_count - 1 > max_args) | |
2104 | { | |
2105 | addr->transport_return = FAIL; | |
2106 | addr->message = string_sprintf("Too many arguments to command \"%s\" " | |
2107 | "in %s", cmd, etext); | |
2108 | return FALSE; | |
2109 | } | |
2110 | ||
2111 | additional = address_count - 1; | |
2112 | if (additional > 0) | |
2113 | memmove(argv + i + 1 + additional, argv + i + 1, | |
2114 | (argcount - i)*sizeof(uschar *)); | |
2115 | ||
d7978c0f JH |
2116 | for (address_item * ad = addr; ad; ad = ad->next) |
2117 | { | |
2118 | argv[i++] = ad->address; | |
2119 | argcount++; | |
2120 | } | |
09792322 | 2121 | |
700d22f3 PP |
2122 | /* Subtract one since we replace $pipe_addresses */ |
2123 | argcount--; | |
2124 | i--; | |
09792322 NK |
2125 | } |
2126 | ||
2127 | /* Handle special case of $address_pipe when af_force_command is set */ | |
2128 | ||
2129 | else if (addr != NULL && testflag(addr,af_force_command) && | |
2130 | (Ustrcmp(argv[i], "$address_pipe") == 0 || | |
2131 | Ustrcmp(argv[i], "${address_pipe}") == 0)) | |
2132 | { | |
09792322 NK |
2133 | int address_pipe_argcount = 0; |
2134 | int address_pipe_max_args; | |
2135 | uschar **address_pipe_argv; | |
2136 | ||
2137 | /* We can never have more then the argv we will be loading into */ | |
2138 | address_pipe_max_args = max_args - argcount + 1; | |
2139 | ||
2140 | DEBUG(D_transport) | |
700d22f3 | 2141 | debug_printf("address_pipe_max_args=%d\n", address_pipe_max_args); |
09792322 NK |
2142 | |
2143 | /* We allocate an additional for (uschar *)0 */ | |
2144 | address_pipe_argv = store_get((address_pipe_max_args+1)*sizeof(uschar *)); | |
2145 | ||
2146 | /* +1 because addr->local_part[0] == '|' since af_force_command is set */ | |
2147 | s = expand_string(addr->local_part + 1); | |
2148 | ||
700d22f3 PP |
2149 | if (s == NULL || *s == '\0') |
2150 | { | |
2151 | addr->transport_return = FAIL; | |
2152 | addr->message = string_sprintf("Expansion of \"%s\" " | |
2153 | "from command \"%s\" in %s failed: %s", | |
2154 | (addr->local_part + 1), cmd, etext, expand_string_message); | |
09792322 | 2155 | return FALSE; |
700d22f3 | 2156 | } |
09792322 NK |
2157 | |
2158 | while (isspace(*s)) s++; /* strip leading space */ | |
2159 | ||
2160 | while (*s != 0 && address_pipe_argcount < address_pipe_max_args) | |
2161 | { | |
2162 | if (*s == '\'') | |
2163 | { | |
2164 | ss = s + 1; | |
2165 | while (*ss != 0 && *ss != '\'') ss++; | |
2166 | address_pipe_argv[address_pipe_argcount++] = ss = store_get(ss - s++); | |
2167 | while (*s != 0 && *s != '\'') *ss++ = *s++; | |
2168 | if (*s != 0) s++; | |
2169 | *ss++ = 0; | |
2170 | } | |
55414b25 JH |
2171 | else address_pipe_argv[address_pipe_argcount++] = |
2172 | string_copy(string_dequote(CUSS &s)); | |
09792322 NK |
2173 | while (isspace(*s)) s++; /* strip space after arg */ |
2174 | } | |
2175 | ||
5903c6ff | 2176 | address_pipe_argv[address_pipe_argcount] = US 0; |
09792322 NK |
2177 | |
2178 | /* If *s != 0 we have run out of argument slots. */ | |
2179 | if (*s != 0) | |
2180 | { | |
2181 | uschar *msg = string_sprintf("Too many arguments in $address_pipe " | |
2182 | "\"%s\" in %s", addr->local_part + 1, etext); | |
2183 | if (addr != NULL) | |
2184 | { | |
2185 | addr->transport_return = FAIL; | |
2186 | addr->message = msg; | |
2187 | } | |
2188 | else *errptr = msg; | |
2189 | return FALSE; | |
2190 | } | |
2191 | ||
700d22f3 PP |
2192 | /* address_pipe_argcount - 1 |
2193 | * because we are replacing $address_pipe in the argument list | |
2194 | * with the first thing it expands to */ | |
09792322 NK |
2195 | if (argcount + address_pipe_argcount - 1 > max_args) |
2196 | { | |
2197 | addr->transport_return = FAIL; | |
2198 | addr->message = string_sprintf("Too many arguments to command " | |
2199 | "\"%s\" after expanding $address_pipe in %s", cmd, etext); | |
2200 | return FALSE; | |
2201 | } | |
2202 | ||
2203 | /* If we are not just able to replace the slot that contained | |
2204 | * $address_pipe (address_pipe_argcount == 1) | |
700d22f3 | 2205 | * We have to move the existing argv by address_pipe_argcount - 1 |
09792322 NK |
2206 | * Visually if address_pipe_argcount == 2: |
2207 | * [argv 0][argv 1][argv 2($address_pipe)][argv 3][0] | |
700d22f3 | 2208 | * [argv 0][argv 1][ap_arg0][ap_arg1][old argv 3][0] |
09792322 NK |
2209 | */ |
2210 | if (address_pipe_argcount > 1) | |
2211 | memmove( | |
4c04137d | 2212 | /* current position + additional args */ |
09792322 NK |
2213 | argv + i + address_pipe_argcount, |
2214 | /* current position + 1 (for the (uschar *)0 at the end) */ | |
2215 | argv + i + 1, | |
2216 | /* -1 for the (uschar *)0 at the end)*/ | |
2217 | (argcount - i)*sizeof(uschar *) | |
2218 | ); | |
2219 | ||
2220 | /* Now we fill in the slots we just moved argv out of | |
2221 | * [argv 0][argv 1][argv 2=pipeargv[0]][argv 3=pipeargv[1]][old argv 3][0] | |
2222 | */ | |
d7978c0f | 2223 | for (int address_pipe_i = 0; |
5903c6ff | 2224 | address_pipe_argv[address_pipe_i] != US 0; |
700d22f3 PP |
2225 | address_pipe_i++) |
2226 | { | |
2227 | argv[i++] = address_pipe_argv[address_pipe_i]; | |
2228 | argcount++; | |
09792322 NK |
2229 | } |
2230 | ||
700d22f3 PP |
2231 | /* Subtract one since we replace $address_pipe */ |
2232 | argcount--; | |
2233 | i--; | |
059ec3d9 PH |
2234 | } |
2235 | ||
2236 | /* Handle normal expansion string */ | |
2237 | ||
2238 | else | |
2239 | { | |
55414b25 | 2240 | const uschar *expanded_arg; |
8768d548 | 2241 | f.enable_dollar_recipients = allow_dollar_recipients; |
55414b25 | 2242 | expanded_arg = expand_cstring(argv[i]); |
8768d548 | 2243 | f.enable_dollar_recipients = FALSE; |
059ec3d9 PH |
2244 | |
2245 | if (expanded_arg == NULL) | |
2246 | { | |
2247 | uschar *msg = string_sprintf("Expansion of \"%s\" " | |
2248 | "from command \"%s\" in %s failed: %s", | |
2249 | argv[i], cmd, etext, expand_string_message); | |
2250 | if (addr != NULL) | |
2251 | { | |
2252 | addr->transport_return = expand_failed; | |
2253 | addr->message = msg; | |
2254 | } | |
2255 | else *errptr = msg; | |
2256 | return FALSE; | |
2257 | } | |
2258 | argv[i] = expanded_arg; | |
2259 | } | |
2260 | } | |
2261 | ||
2262 | DEBUG(D_transport) | |
2263 | { | |
2264 | debug_printf("direct command after expansion:\n"); | |
d7978c0f | 2265 | for (int i = 0; argv[i] != US 0; i++) |
059ec3d9 PH |
2266 | debug_printf(" argv[%d] = %s\n", i, string_printing(argv[i])); |
2267 | } | |
2268 | } | |
2269 | ||
2270 | return TRUE; | |
2271 | } | |
2272 | ||
d185889f | 2273 | #endif /*!MACRO_PREDEF*/ |
511a6c14 JH |
2274 | /* vi: aw ai sw=2 |
2275 | */ | |
059ec3d9 | 2276 | /* End of transport.c */ |