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       sscanf(big_buffer+7, TIME_T_FMT, &deliver_frozen_at);
 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 */