RFC3461 support - MIME DSN messages. Bug 118
[exim.git] / src / src / spool_in.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2012 */
6 /* See the file NOTICE for conditions of use and distribution. */
7
8 /* Functions for reading spool files. When compiling for a utility (eximon),
9 not all are needed, and some functionality can be cut out. */
10
11
12 #include "exim.h"
13
14
15
16 #ifndef COMPILE_UTILITY
17 /*************************************************
18 * Open and lock data file *
19 *************************************************/
20
21 /* The data file is the one that is used for locking, because the header file
22 can get replaced during delivery because of header rewriting. The file has
23 to opened with write access so that we can get an exclusive lock, but in
24 fact it won't be written to. Just in case there's a major disaster (e.g.
25 overwriting some other file descriptor with the value of this one), open it
26 with append.
27
28 Argument: the id of the message
29 Returns: TRUE if file successfully opened and locked
30
31 Side effect: deliver_datafile is set to the fd of the open file.
32 */
33
34 BOOL
35 spool_open_datafile(uschar *id)
36 {
37 int i;
38 struct stat statbuf;
39 flock_t lock_data;
40 uschar spoolname[256];
41
42 /* If split_spool_directory is set, first look for the file in the appropriate
43 sub-directory of the input directory. If it is not found there, try the input
44 directory itself, to pick up leftovers from before the splitting. If split_
45 spool_directory is not set, first look in the main input directory. If it is
46 not found there, try the split sub-directory, in case it is left over from a
47 splitting state. */
48
49 for (i = 0; i < 2; i++)
50 {
51 int save_errno;
52 message_subdir[0] = (split_spool_directory == (i == 0))? id[5] : 0;
53 sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir, id);
54 deliver_datafile = Uopen(spoolname, O_RDWR | O_APPEND, 0);
55 if (deliver_datafile >= 0) break;
56 save_errno = errno;
57 if (errno == ENOENT)
58 {
59 if (i == 0) continue;
60 if (!queue_running)
61 log_write(0, LOG_MAIN, "Spool file %s-D not found", id);
62 }
63 else log_write(0, LOG_MAIN, "Spool error for %s: %s", spoolname,
64 strerror(errno));
65 errno = save_errno;
66 return FALSE;
67 }
68
69 /* File is open and message_subdir is set. Set the close-on-exec flag, and lock
70 the file. We lock only the first line of the file (containing the message ID)
71 because this apparently is needed for running Exim under Cygwin. If the entire
72 file is locked in one process, a sub-process cannot access it, even when passed
73 an open file descriptor (at least, I think that's the Cygwin story). On real
74 Unix systems it doesn't make any difference as long as Exim is consistent in
75 what it locks. */
76
77 (void)fcntl(deliver_datafile, F_SETFD, fcntl(deliver_datafile, F_GETFD) |
78 FD_CLOEXEC);
79
80 lock_data.l_type = F_WRLCK;
81 lock_data.l_whence = SEEK_SET;
82 lock_data.l_start = 0;
83 lock_data.l_len = SPOOL_DATA_START_OFFSET;
84
85 if (fcntl(deliver_datafile, F_SETLK, &lock_data) < 0)
86 {
87 log_write(L_skip_delivery,
88 LOG_MAIN,
89 "Spool file is locked (another process is handling this message)");
90 (void)close(deliver_datafile);
91 deliver_datafile = -1;
92 errno = 0;
93 return FALSE;
94 }
95
96 /* Get the size of the data; don't include the leading filename line
97 in the count, but add one for the newline before the data. */
98
99 if (fstat(deliver_datafile, &statbuf) == 0)
100 {
101 message_body_size = statbuf.st_size - SPOOL_DATA_START_OFFSET;
102 message_size = message_body_size + 1;
103 }
104
105 return TRUE;
106 }
107 #endif /* COMPILE_UTILITY */
108
109
110
111 /*************************************************
112 * Read non-recipients tree from spool file *
113 *************************************************/
114
115 /* The tree of non-recipients is written to the spool file in a form that
116 makes it easy to read back into a tree. The format is as follows:
117
118 . Each node is preceded by two letter(Y/N) indicating whether it has left
119 or right children. There's one space after the two flags, before the name.
120
121 . The left subtree (if any) then follows, then the right subtree (if any).
122
123 This function is entered with the next input line in the buffer. Note we must
124 save the right flag before recursing with the same buffer.
125
126 Once the tree is read, we re-construct the balance fields by scanning the tree.
127 I forgot to write them out originally, and the compatible fix is to do it this
128 way. This initial local recursing function does the necessary.
129
130 Arguments:
131 node tree node
132
133 Returns: maximum depth below the node, including the node itself
134 */
135
136 static int
137 count_below(tree_node *node)
138 {
139 int nleft, nright;
140 if (node == NULL) return 0;
141 nleft = count_below(node->left);
142 nright = count_below(node->right);
143 node->balance = (nleft > nright)? 1 : ((nright > nleft)? 2 : 0);
144 return 1 + ((nleft > nright)? nleft : nright);
145 }
146
147 /* This is the real function...
148
149 Arguments:
150 connect pointer to the root of the tree
151 f FILE to read data from
152 buffer contains next input line; further lines read into it
153 buffer_size size of the buffer
154
155 Returns: FALSE on format error
156 */
157
158 static BOOL
159 read_nonrecipients_tree(tree_node **connect, FILE *f, uschar *buffer,
160 int buffer_size)
161 {
162 tree_node *node;
163 int n = Ustrlen(buffer);
164 BOOL right = buffer[1] == 'Y';
165
166 if (n < 5) return FALSE; /* malformed line */
167 buffer[n-1] = 0; /* Remove \n */
168 node = store_get(sizeof(tree_node) + n - 3);
169 *connect = node;
170 Ustrcpy(node->name, buffer + 3);
171 node->data.ptr = NULL;
172
173 if (buffer[0] == 'Y')
174 {
175 if (Ufgets(buffer, buffer_size, f) == NULL ||
176 !read_nonrecipients_tree(&node->left, f, buffer, buffer_size))
177 return FALSE;
178 }
179 else node->left = NULL;
180
181 if (right)
182 {
183 if (Ufgets(buffer, buffer_size, f) == NULL ||
184 !read_nonrecipients_tree(&node->right, f, buffer, buffer_size))
185 return FALSE;
186 }
187 else node->right = NULL;
188
189 (void) count_below(*connect);
190 return TRUE;
191 }
192
193
194
195
196 /*************************************************
197 * Read spool header file *
198 *************************************************/
199
200 /* This function reads a spool header file and places the data into the
201 appropriate global variables. The header portion is always read, but header
202 structures are built only if read_headers is set true. It isn't, for example,
203 while generating -bp output.
204
205 It may be possible for blocks of nulls (binary zeroes) to get written on the
206 end of a file if there is a system crash during writing. It was observed on an
207 earlier version of Exim that omitted to fsync() the files - this is thought to
208 have been the cause of that incident, but in any case, this code must be robust
209 against such an event, and if such a file is encountered, it must be treated as
210 malformed.
211
212 Arguments:
213 name name of the header file, including the -H
214 read_headers TRUE if in-store header structures are to be built
215 subdir_set TRUE is message_subdir is already set
216
217 Returns: spool_read_OK success
218 spool_read_notopen open failed
219 spool_read_enverror error in the envelope portion
220 spool_read_hdrdrror error in the header portion
221 */
222
223 int
224 spool_read_header(uschar *name, BOOL read_headers, BOOL subdir_set)
225 {
226 FILE *f = NULL;
227 int n;
228 int rcount = 0;
229 long int uid, gid;
230 BOOL inheader = FALSE;
231 uschar *p;
232
233 /* Reset all the global variables to their default values. However, there is
234 one exception. DO NOT change the default value of dont_deliver, because it may
235 be forced by an external setting. */
236
237 acl_var_c = acl_var_m = NULL;
238 authenticated_id = NULL;
239 authenticated_sender = NULL;
240 allow_unqualified_recipient = FALSE;
241 allow_unqualified_sender = FALSE;
242 body_linecount = 0;
243 body_zerocount = 0;
244 deliver_firsttime = FALSE;
245 deliver_freeze = FALSE;
246 deliver_frozen_at = 0;
247 deliver_manual_thaw = FALSE;
248 /* dont_deliver must NOT be reset */
249 header_list = header_last = NULL;
250 host_lookup_deferred = FALSE;
251 host_lookup_failed = FALSE;
252 interface_address = NULL;
253 interface_port = 0;
254 local_error_message = FALSE;
255 local_scan_data = NULL;
256 max_received_linelength = 0;
257 message_linecount = 0;
258 received_protocol = NULL;
259 received_count = 0;
260 recipients_list = NULL;
261 sender_address = NULL;
262 sender_fullhost = NULL;
263 sender_helo_name = NULL;
264 sender_host_address = NULL;
265 sender_host_name = NULL;
266 sender_host_port = 0;
267 sender_host_authenticated = NULL;
268 sender_ident = NULL;
269 sender_local = FALSE;
270 sender_set_untrusted = FALSE;
271 smtp_active_hostname = primary_hostname;
272 tree_nonrecipients = NULL;
273
274 #ifdef EXPERIMENTAL_BRIGHTMAIL
275 bmi_run = 0;
276 bmi_verdicts = NULL;
277 #endif
278
279 #ifndef DISABLE_DKIM
280 dkim_signers = NULL;
281 dkim_disable_verify = FALSE;
282 dkim_collect_input = FALSE;
283 #endif
284
285 #ifdef SUPPORT_TLS
286 tls_in.certificate_verified = FALSE;
287 tls_in.cipher = NULL;
288 tls_in.ourcert = NULL;
289 tls_in.peercert = NULL;
290 tls_in.peerdn = NULL;
291 tls_in.sni = NULL;
292 tls_in.ocsp = OCSP_NOT_REQ;
293 #endif
294
295 #ifdef WITH_CONTENT_SCAN
296 spam_score_int = NULL;
297 #endif
298
299 #ifdef EXPERIMENTAL_DSN
300 dsn_ret = 0;
301 dsn_envid = NULL;
302 #endif
303
304 /* Generate the full name and open the file. If message_subdir is already
305 set, just look in the given directory. Otherwise, look in both the split
306 and unsplit directories, as for the data file above. */
307
308 for (n = 0; n < 2; n++)
309 {
310 if (!subdir_set)
311 message_subdir[0] = (split_spool_directory == (n == 0))? name[5] : 0;
312 sprintf(CS big_buffer, "%s/input/%s/%s", spool_directory, message_subdir,
313 name);
314 f = Ufopen(big_buffer, "rb");
315 if (f != NULL) break;
316 if (n != 0 || subdir_set || errno != ENOENT) return spool_read_notopen;
317 }
318
319 errno = 0;
320
321 #ifndef COMPILE_UTILITY
322 DEBUG(D_deliver) debug_printf("reading spool file %s\n", name);
323 #endif /* COMPILE_UTILITY */
324
325 /* The first line of a spool file contains the message id followed by -H (i.e.
326 the file name), in order to make the file self-identifying. */
327
328 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
329 if (Ustrlen(big_buffer) != MESSAGE_ID_LENGTH + 3 ||
330 Ustrncmp(big_buffer, name, MESSAGE_ID_LENGTH + 2) != 0)
331 goto SPOOL_FORMAT_ERROR;
332
333 /* The next three lines in the header file are in a fixed format. The first
334 contains the login, uid, and gid of the user who caused the file to be written.
335 There are known cases where a negative gid is used, so we allow for both
336 negative uids and gids. The second contains the mail address of the message's
337 sender, enclosed in <>. The third contains the time the message was received,
338 and the number of warning messages for delivery delays that have been sent. */
339
340 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
341
342 p = big_buffer + Ustrlen(big_buffer);
343 while (p > big_buffer && isspace(p[-1])) p--;
344 *p = 0;
345 if (!isdigit(p[-1])) goto SPOOL_FORMAT_ERROR;
346 while (p > big_buffer && (isdigit(p[-1]) || '-' == p[-1])) p--;
347 gid = Uatoi(p);
348 if (p <= big_buffer || *(--p) != ' ') goto SPOOL_FORMAT_ERROR;
349 *p = 0;
350 if (!isdigit(p[-1])) goto SPOOL_FORMAT_ERROR;
351 while (p > big_buffer && (isdigit(p[-1]) || '-' == p[-1])) p--;
352 uid = Uatoi(p);
353 if (p <= big_buffer || *(--p) != ' ') goto SPOOL_FORMAT_ERROR;
354 *p = 0;
355
356 originator_login = string_copy(big_buffer);
357 originator_uid = (uid_t)uid;
358 originator_gid = (gid_t)gid;
359
360 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
361 n = Ustrlen(big_buffer);
362 if (n < 3 || big_buffer[0] != '<' || big_buffer[n-2] != '>')
363 goto SPOOL_FORMAT_ERROR;
364
365 sender_address = store_get(n-2);
366 Ustrncpy(sender_address, big_buffer+1, n-3);
367 sender_address[n-3] = 0;
368
369 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
370 if (sscanf(CS big_buffer, "%d %d", &received_time, &warning_count) != 2)
371 goto SPOOL_FORMAT_ERROR;
372
373 message_age = time(NULL) - received_time;
374
375 #ifndef COMPILE_UTILITY
376 DEBUG(D_deliver) debug_printf("user=%s uid=%ld gid=%ld sender=%s\n",
377 originator_login, (long int)originator_uid, (long int)originator_gid,
378 sender_address);
379 #endif /* COMPILE_UTILITY */
380
381 /* Now there may be a number of optional lines, each starting with "-". If you
382 add a new setting here, make sure you set the default above.
383
384 Because there are now quite a number of different possibilities, we use a
385 switch on the first character to avoid too many failing tests. Thanks to Nico
386 Erfurth for the patch that implemented this. I have made it even more efficient
387 by not re-scanning the first two characters.
388
389 To allow new versions of Exim that add additional flags to interwork with older
390 versions that do not understand them, just ignore any lines starting with "-"
391 that we don't recognize. Otherwise it wouldn't be possible to back off a new
392 version that left new-style flags written on the spool. */
393
394 p = big_buffer + 2;
395 for (;;)
396 {
397 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
398 if (big_buffer[0] != '-') break;
399 big_buffer[Ustrlen(big_buffer) - 1] = 0;
400
401 switch(big_buffer[1])
402 {
403 case 'a':
404
405 /* Nowadays we use "-aclc" and "-aclm" for the different types of ACL
406 variable, because Exim allows any number of them, with arbitrary names.
407 The line in the spool file is "-acl[cm] <name> <length>". The name excludes
408 the c or m. */
409
410 if (Ustrncmp(p, "clc ", 4) == 0 ||
411 Ustrncmp(p, "clm ", 4) == 0)
412 {
413 uschar *name, *endptr;
414 int count;
415 tree_node *node;
416 endptr = Ustrchr(big_buffer + 6, ' ');
417 if (endptr == NULL) goto SPOOL_FORMAT_ERROR;
418 name = string_sprintf("%c%.*s", big_buffer[4], endptr - big_buffer - 6,
419 big_buffer + 6);
420 if (sscanf(CS endptr, " %d", &count) != 1) goto SPOOL_FORMAT_ERROR;
421 node = acl_var_create(name);
422 node->data.ptr = store_get(count + 1);
423 if (fread(node->data.ptr, 1, count+1, f) < count) goto SPOOL_READ_ERROR;
424 ((uschar*)node->data.ptr)[count] = 0;
425 }
426
427 else if (Ustrcmp(p, "llow_unqualified_recipient") == 0)
428 allow_unqualified_recipient = TRUE;
429 else if (Ustrcmp(p, "llow_unqualified_sender") == 0)
430 allow_unqualified_sender = TRUE;
431
432 else if (Ustrncmp(p, "uth_id", 6) == 0)
433 authenticated_id = string_copy(big_buffer + 9);
434 else if (Ustrncmp(p, "uth_sender", 10) == 0)
435 authenticated_sender = string_copy(big_buffer + 13);
436 else if (Ustrncmp(p, "ctive_hostname", 14) == 0)
437 smtp_active_hostname = string_copy(big_buffer + 17);
438
439 /* For long-term backward compatibility, we recognize "-acl", which was
440 used before the number of ACL variables changed from 10 to 20. This was
441 before the subsequent change to an arbitrary number of named variables.
442 This code is retained so that upgrades from very old versions can still
443 handle old-format spool files. The value given after "-acl" is a number
444 that is 0-9 for connection variables, and 10-19 for message variables. */
445
446 else if (Ustrncmp(p, "cl ", 3) == 0)
447 {
448 int index, count;
449 uschar name[20]; /* Need plenty of space for %d format */
450 tree_node *node;
451 if (sscanf(CS big_buffer + 5, "%d %d", &index, &count) != 2)
452 goto SPOOL_FORMAT_ERROR;
453 if (index < 10)
454 (void) string_format(name, sizeof(name), "%c%d", 'c', index);
455 else if (index < 20) /* ignore out-of-range index */
456 (void) string_format(name, sizeof(name), "%c%d", 'm', index - 10);
457 node = acl_var_create(name);
458 node->data.ptr = store_get(count + 1);
459 if (fread(node->data.ptr, 1, count+1, f) < count) goto SPOOL_READ_ERROR;
460 ((uschar*)node->data.ptr)[count] = 0;
461 }
462 break;
463
464 case 'b':
465 if (Ustrncmp(p, "ody_linecount", 13) == 0)
466 body_linecount = Uatoi(big_buffer + 15);
467 else if (Ustrncmp(p, "ody_zerocount", 13) == 0)
468 body_zerocount = Uatoi(big_buffer + 15);
469 #ifdef EXPERIMENTAL_BRIGHTMAIL
470 else if (Ustrncmp(p, "mi_verdicts ", 12) == 0)
471 bmi_verdicts = string_copy(big_buffer + 14);
472 #endif
473 break;
474
475 case 'd':
476 if (Ustrcmp(p, "eliver_firsttime") == 0)
477 deliver_firsttime = TRUE;
478 #ifdef EXPERIMENTAL_DSN
479 /* Check if the dsn flags have been set in the header file */
480 else if (Ustrncmp(p, "sn_ret", 6) == 0)
481 {
482 dsn_ret= atoi(big_buffer + 8);
483 }
484 else if (Ustrncmp(p, "sn_envid", 8) == 0)
485 {
486 dsn_envid = string_copy(big_buffer + 11);
487 }
488 #endif
489 break;
490
491 case 'f':
492 if (Ustrncmp(p, "rozen", 5) == 0)
493 {
494 deliver_freeze = TRUE;
495 deliver_frozen_at = Uatoi(big_buffer + 7);
496 }
497 break;
498
499 case 'h':
500 if (Ustrcmp(p, "ost_lookup_deferred") == 0)
501 host_lookup_deferred = TRUE;
502 else if (Ustrcmp(p, "ost_lookup_failed") == 0)
503 host_lookup_failed = TRUE;
504 else if (Ustrncmp(p, "ost_auth", 8) == 0)
505 sender_host_authenticated = string_copy(big_buffer + 11);
506 else if (Ustrncmp(p, "ost_name", 8) == 0)
507 sender_host_name = string_copy(big_buffer + 11);
508 else if (Ustrncmp(p, "elo_name", 8) == 0)
509 sender_helo_name = string_copy(big_buffer + 11);
510
511 /* We now record the port number after the address, separated by a
512 dot. For compatibility during upgrading, do nothing if there
513 isn't a value (it gets left at zero). */
514
515 else if (Ustrncmp(p, "ost_address", 11) == 0)
516 {
517 sender_host_port = host_address_extract_port(big_buffer + 14);
518 sender_host_address = string_copy(big_buffer + 14);
519 }
520 break;
521
522 case 'i':
523 if (Ustrncmp(p, "nterface_address", 16) == 0)
524 {
525 interface_port = host_address_extract_port(big_buffer + 19);
526 interface_address = string_copy(big_buffer + 19);
527 }
528 else if (Ustrncmp(p, "dent", 4) == 0)
529 sender_ident = string_copy(big_buffer + 7);
530 break;
531
532 case 'l':
533 if (Ustrcmp(p, "ocal") == 0) sender_local = TRUE;
534 else if (Ustrcmp(big_buffer, "-localerror") == 0)
535 local_error_message = TRUE;
536 else if (Ustrncmp(p, "ocal_scan ", 10) == 0)
537 local_scan_data = string_copy(big_buffer + 12);
538 break;
539
540 case 'm':
541 if (Ustrcmp(p, "anual_thaw") == 0) deliver_manual_thaw = TRUE;
542 else if (Ustrncmp(p, "ax_received_linelength", 22) == 0)
543 max_received_linelength = Uatoi(big_buffer + 24);
544 break;
545
546 case 'N':
547 if (*p == 0) dont_deliver = TRUE; /* -N */
548 break;
549
550 case 'r':
551 if (Ustrncmp(p, "eceived_protocol", 16) == 0)
552 received_protocol = string_copy(big_buffer + 19);
553 break;
554
555 case 's':
556 if (Ustrncmp(p, "ender_set_untrusted", 19) == 0)
557 sender_set_untrusted = TRUE;
558 #ifdef WITH_CONTENT_SCAN
559 else if (Ustrncmp(p, "pam_score_int ", 14) == 0)
560 spam_score_int = string_copy(big_buffer + 16);
561 #endif
562 break;
563
564 #ifdef SUPPORT_TLS
565 case 't':
566 if (Ustrncmp(p, "ls_certificate_verified", 23) == 0)
567 tls_in.certificate_verified = TRUE;
568 else if (Ustrncmp(p, "ls_cipher", 9) == 0)
569 tls_in.cipher = string_copy(big_buffer + 12);
570 #ifndef COMPILE_UTILITY
571 else if (Ustrncmp(p, "ls_ourcert", 10) == 0)
572 (void) tls_import_cert(big_buffer + 13, &tls_in.ourcert);
573 else if (Ustrncmp(p, "ls_peercert", 11) == 0)
574 (void) tls_import_cert(big_buffer + 14, &tls_in.peercert);
575 #endif
576 else if (Ustrncmp(p, "ls_peerdn", 9) == 0)
577 tls_in.peerdn = string_unprinting(string_copy(big_buffer + 12));
578 else if (Ustrncmp(p, "ls_sni", 6) == 0)
579 tls_in.sni = string_unprinting(string_copy(big_buffer + 9));
580 else if (Ustrncmp(p, "ls_ocsp", 7) == 0)
581 tls_in.ocsp = big_buffer[10] - '0';
582 break;
583 #endif
584
585 default: /* Present because some compilers complain if all */
586 break; /* possibilities are not covered. */
587 }
588 }
589
590 /* Build sender_fullhost if required */
591
592 #ifndef COMPILE_UTILITY
593 host_build_sender_fullhost();
594 #endif /* COMPILE_UTILITY */
595
596 #ifndef COMPILE_UTILITY
597 DEBUG(D_deliver)
598 debug_printf("sender_local=%d ident=%s\n", sender_local,
599 (sender_ident == NULL)? US"unset" : sender_ident);
600 #endif /* COMPILE_UTILITY */
601
602 /* We now have the tree of addresses NOT to deliver to, or a line
603 containing "XX", indicating no tree. */
604
605 if (Ustrncmp(big_buffer, "XX\n", 3) != 0 &&
606 !read_nonrecipients_tree(&tree_nonrecipients, f, big_buffer, big_buffer_size))
607 goto SPOOL_FORMAT_ERROR;
608
609 #ifndef COMPILE_UTILITY
610 DEBUG(D_deliver)
611 {
612 debug_printf("Non-recipients:\n");
613 debug_print_tree(tree_nonrecipients);
614 }
615 #endif /* COMPILE_UTILITY */
616
617 /* After reading the tree, the next line has not yet been read into the
618 buffer. It contains the count of recipients which follow on separate lines. */
619
620 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
621 if (sscanf(CS big_buffer, "%d", &rcount) != 1) goto SPOOL_FORMAT_ERROR;
622
623 #ifndef COMPILE_UTILITY
624 DEBUG(D_deliver) debug_printf("recipients_count=%d\n", rcount);
625 #endif /* COMPILE_UTILITY */
626
627 recipients_list_max = rcount;
628 recipients_list = store_get(rcount * sizeof(recipient_item));
629
630 for (recipients_count = 0; recipients_count < rcount; recipients_count++)
631 {
632 int nn;
633 int pno = -1;
634 #ifdef EXPERIMENTAL_DSN
635 int dsn_flags = 0;
636 uschar *orcpt = NULL;
637 #endif
638 uschar *errors_to = NULL;
639 uschar *p;
640
641 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
642 nn = Ustrlen(big_buffer);
643 if (nn < 2) goto SPOOL_FORMAT_ERROR;
644
645 /* Remove the newline; this terminates the address if there is no additional
646 data on the line. */
647
648 p = big_buffer + nn - 1;
649 *p-- = 0;
650
651 /* Look back from the end of the line for digits and special terminators.
652 Since an address must end with a domain, we can tell that extra data is
653 present by the presence of the terminator, which is always some character
654 that cannot exist in a domain. (If I'd thought of the need for additional
655 data early on, I'd have put it at the start, with the address at the end. As
656 it is, we have to operate backwards. Addresses are permitted to contain
657 spaces, you see.)
658
659 This code has to cope with various versions of this data that have evolved
660 over time. In all cases, the line might just contain an address, with no
661 additional data. Otherwise, the possibilities are as follows:
662
663 Exim 3 type: <address><space><digits>,<digits>,<digits>
664
665 The second set of digits is the parent number for one_time addresses. The
666 other values were remnants of earlier experiments that were abandoned.
667
668 Exim 4 first type: <address><space><digits>
669
670 The digits are the parent number for one_time addresses.
671
672 Exim 4 new type: <address><space><data>#<type bits>
673
674 The type bits indicate what the contents of the data are.
675
676 Bit 01 indicates that, reading from right to left, the data
677 ends with <errors_to address><space><len>,<pno> where pno is
678 the parent number for one_time addresses, and len is the length
679 of the errors_to address (zero meaning none).
680
681 Bit 02 indicates that, again reading from right to left, the data continues
682 with orcpt len(orcpt),dsn_flags
683 */
684
685 while (isdigit(*p)) p--;
686
687 /* Handle Exim 3 spool files */
688
689 if (*p == ',')
690 {
691 int dummy;
692 while (isdigit(*(--p)) || *p == ',');
693 if (*p == ' ')
694 {
695 *p++ = 0;
696 (void)sscanf(CS p, "%d,%d", &dummy, &pno);
697 }
698 }
699
700 /* Handle early Exim 4 spool files */
701
702 else if (*p == ' ')
703 {
704 *p++ = 0;
705 (void)sscanf(CS p, "%d", &pno);
706 }
707
708 /* Handle current format Exim 4 spool files */
709
710 else if (*p == '#')
711 {
712 int flags;
713
714 #ifdef EXPERIMENTAL_DSN
715 #ifndef COMPILE_UTILITY
716 DEBUG(D_deliver) debug_printf("**** SPOOL_IN - Exim 4 standard format spoolfile\n");
717 #endif /* COMPILE_UTILITY */
718 #endif
719
720 (void)sscanf(CS p+1, "%d", &flags);
721
722 if ((flags & 0x01) != 0) /* one_time data exists */
723 {
724 int len;
725 while (isdigit(*(--p)) || *p == ',' || *p == '-');
726 (void)sscanf(CS p+1, "%d,%d", &len, &pno);
727 *p = 0;
728 if (len > 0)
729 {
730 p -= len;
731 errors_to = string_copy(p);
732 }
733 }
734
735 *(--p) = 0; /* Terminate address */
736 #ifdef EXPERIMENTAL_DSN
737 if ((flags & 0x02) != 0) /* one_time data exists */
738 {
739 int len;
740 while (isdigit(*(--p)) || *p == ',' || *p == '-');
741 (void)sscanf(CS p+1, "%d,%d", &len, &dsn_flags);
742 *p = 0;
743 if (len > 0)
744 {
745 p -= len;
746 orcpt = string_copy(p);
747 }
748 }
749
750 *(--p) = 0; /* Terminate address */
751 #endif /* EXPERIMENTAL_DSN */
752 }
753 #ifdef EXPERIMENTAL_DSN
754 #ifndef COMPILE_UTILITY
755 else
756 {
757 DEBUG(D_deliver) debug_printf("**** SPOOL_IN - No additional fields\n");
758 }
759
760 if ((orcpt != NULL) || (dsn_flags != 0))
761 {
762 DEBUG(D_deliver) debug_printf("**** SPOOL_IN - address: |%s| orcpt: |%s| dsn_flags: %d\n",
763 big_buffer, orcpt, dsn_flags);
764 }
765 if (errors_to != NULL)
766 {
767 DEBUG(D_deliver) debug_printf("**** SPOOL_IN - address: |%s| errorsto: |%s|\n",
768 big_buffer, errors_to);
769 }
770 #endif /* COMPILE_UTILITY */
771 #endif /* EXPERIMENTAL_DSN */
772
773 recipients_list[recipients_count].address = string_copy(big_buffer);
774 recipients_list[recipients_count].pno = pno;
775 recipients_list[recipients_count].errors_to = errors_to;
776 #ifdef EXPERIMENTAL_DSN
777 recipients_list[recipients_count].orcpt = orcpt;
778 recipients_list[recipients_count].dsn_flags = dsn_flags;
779 #endif
780 }
781
782 /* The remainder of the spool header file contains the headers for the message,
783 separated off from the previous data by a blank line. Each header is preceded
784 by a count of its length and either a certain letter (for various identified
785 headers), space (for a miscellaneous live header) or an asterisk (for a header
786 that has been rewritten). Count the Received: headers. We read the headers
787 always, in order to check on the format of the file, but only create a header
788 list if requested to do so. */
789
790 inheader = TRUE;
791 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
792 if (big_buffer[0] != '\n') goto SPOOL_FORMAT_ERROR;
793
794 while ((n = fgetc(f)) != EOF)
795 {
796 header_line *h;
797 uschar flag[4];
798 int i;
799
800 if (!isdigit(n)) goto SPOOL_FORMAT_ERROR;
801 if(ungetc(n, f) == EOF || fscanf(f, "%d%c ", &n, flag) == EOF)
802 goto SPOOL_READ_ERROR;
803 if (flag[0] != '*') message_size += n; /* Omit non-transmitted headers */
804
805 if (read_headers)
806 {
807 h = store_get(sizeof(header_line));
808 h->next = NULL;
809 h->type = flag[0];
810 h->slen = n;
811 h->text = store_get(n+1);
812
813 if (h->type == htype_received) received_count++;
814
815 if (header_list == NULL) header_list = h;
816 else header_last->next = h;
817 header_last = h;
818
819 for (i = 0; i < n; i++)
820 {
821 int c = fgetc(f);
822 if (c == 0 || c == EOF) goto SPOOL_FORMAT_ERROR;
823 if (c == '\n' && h->type != htype_old) message_linecount++;
824 h->text[i] = c;
825 }
826 h->text[i] = 0;
827 }
828
829 /* Not requiring header data, just skip through the bytes */
830
831 else for (i = 0; i < n; i++)
832 {
833 int c = fgetc(f);
834 if (c == 0 || c == EOF) goto SPOOL_FORMAT_ERROR;
835 }
836 }
837
838 /* We have successfully read the data in the header file. Update the message
839 line count by adding the body linecount to the header linecount. Close the file
840 and give a positive response. */
841
842 #ifndef COMPILE_UTILITY
843 DEBUG(D_deliver) debug_printf("body_linecount=%d message_linecount=%d\n",
844 body_linecount, message_linecount);
845 #endif /* COMPILE_UTILITY */
846
847 message_linecount += body_linecount;
848
849 fclose(f);
850 return spool_read_OK;
851
852
853 /* There was an error reading the spool or there was missing data,
854 or there was a format error. A "read error" with no errno means an
855 unexpected EOF, which we treat as a format error. */
856
857 SPOOL_READ_ERROR:
858 if (errno != 0)
859 {
860 n = errno;
861
862 #ifndef COMPILE_UTILITY
863 DEBUG(D_any) debug_printf("Error while reading spool file %s\n", name);
864 #endif /* COMPILE_UTILITY */
865
866 fclose(f);
867 errno = n;
868 return inheader? spool_read_hdrerror : spool_read_enverror;
869 }
870
871 SPOOL_FORMAT_ERROR:
872
873 #ifndef COMPILE_UTILITY
874 DEBUG(D_any) debug_printf("Format error in spool file %s\n", name);
875 #endif /* COMPILE_UTILITY */
876
877 fclose(f);
878 errno = ERRNO_SPOOLFORMAT;
879 return inheader? spool_read_hdrerror : spool_read_enverror;
880 }
881
882 /* vi: aw ai sw=2
883 */
884 /* End of spool_in.c */