src/src/routers/redirect.c

   1 /*************************************************
   2 *     Exim - an Internet mail transport agent    *
   3 *************************************************/
   4
   5 /* Copyright (c) University of Cambridge 1995 - 2018 */
   6 /* See the file NOTICE for conditions of use and distribution. */
   7
   8
   9 #include "../exim.h"
  10 #include "rf_functions.h"
  11 #include "redirect.h"
  12
  13
  14
  15 /* Options specific to the redirect router. */
  16
  17 optionlist redirect_router_options[] = {
  18   { "allow_defer",        opt_bit | (RDON_DEFER << 16),
  19       (void *)offsetof(redirect_router_options_block, bit_options) },
  20   { "allow_fail",         opt_bit | (RDON_FAIL << 16),
  21       (void *)offsetof(redirect_router_options_block, bit_options) },
  22   { "allow_filter",       opt_bit | (RDON_FILTER << 16),
  23       (void *)offsetof(redirect_router_options_block, bit_options) },
  24   { "allow_freeze",       opt_bit | (RDON_FREEZE << 16),
  25       (void *)offsetof(redirect_router_options_block, bit_options) },
  26   { "check_ancestor",     opt_bool,
  27       (void *)offsetof(redirect_router_options_block, check_ancestor) },
  28   { "check_group",        opt_bool,
  29       (void *)offsetof(redirect_router_options_block, check_group) },
  30   { "check_owner",        opt_bool,
  31       (void *)offsetof(redirect_router_options_block, check_owner) },
  32   { "data",               opt_stringptr,
  33       (void *)offsetof(redirect_router_options_block, data) },
  34   { "directory_transport",opt_stringptr,
  35       (void *)offsetof(redirect_router_options_block, directory_transport_name) },
  36   { "file",               opt_stringptr,
  37       (void *)offsetof(redirect_router_options_block, file) },
  38   { "file_transport",     opt_stringptr,
  39       (void *)offsetof(redirect_router_options_block, file_transport_name) },
  40   { "filter_prepend_home",opt_bit | (RDON_PREPEND_HOME << 16),
  41       (void *)offsetof(redirect_router_options_block, bit_options) },
  42   { "forbid_blackhole",   opt_bit | (RDON_BLACKHOLE << 16),
  43       (void *)offsetof(redirect_router_options_block, bit_options) },
  44   { "forbid_exim_filter", opt_bit | (RDON_EXIM_FILTER << 16),
  45       (void *)offsetof(redirect_router_options_block, bit_options) },
  46   { "forbid_file",        opt_bool,
  47       (void *)offsetof(redirect_router_options_block, forbid_file) },
  48   { "forbid_filter_dlfunc", opt_bit | (RDON_DLFUNC << 16),
  49       (void *)offsetof(redirect_router_options_block, bit_options) },
  50   { "forbid_filter_existstest",  opt_bit | (RDON_EXISTS << 16),
  51       (void *)offsetof(redirect_router_options_block, bit_options) },
  52   { "forbid_filter_logwrite",opt_bit | (RDON_LOG << 16),
  53       (void *)offsetof(redirect_router_options_block, bit_options) },
  54   { "forbid_filter_lookup", opt_bit | (RDON_LOOKUP << 16),
  55       (void *)offsetof(redirect_router_options_block, bit_options) },
  56   { "forbid_filter_perl", opt_bit | (RDON_PERL << 16),
  57       (void *)offsetof(redirect_router_options_block, bit_options) },
  58   { "forbid_filter_readfile", opt_bit | (RDON_READFILE << 16),
  59       (void *)offsetof(redirect_router_options_block, bit_options) },
  60   { "forbid_filter_readsocket", opt_bit | (RDON_READSOCK << 16),
  61       (void *)offsetof(redirect_router_options_block, bit_options) },
  62   { "forbid_filter_reply",opt_bool,
  63       (void *)offsetof(redirect_router_options_block, forbid_filter_reply) },
  64   { "forbid_filter_run",  opt_bit | (RDON_RUN << 16),
  65       (void *)offsetof(redirect_router_options_block, bit_options) },
  66   { "forbid_include",     opt_bit | (RDON_INCLUDE << 16),
  67       (void *)offsetof(redirect_router_options_block, bit_options) },
  68   { "forbid_pipe",        opt_bool,
  69       (void *)offsetof(redirect_router_options_block, forbid_pipe) },
  70   { "forbid_sieve_filter",opt_bit | (RDON_SIEVE_FILTER << 16),
  71       (void *)offsetof(redirect_router_options_block, bit_options) },
  72   { "forbid_smtp_code",     opt_bool,
  73       (void *)offsetof(redirect_router_options_block, forbid_smtp_code) },
  74   { "hide_child_in_errmsg", opt_bool,
  75       (void *)offsetof(redirect_router_options_block,  hide_child_in_errmsg) },
  76   { "ignore_eacces",      opt_bit | (RDON_EACCES << 16),
  77       (void *)offsetof(redirect_router_options_block, bit_options) },
  78   { "ignore_enotdir",     opt_bit | (RDON_ENOTDIR << 16),
  79       (void *)offsetof(redirect_router_options_block, bit_options) },
  80   { "include_directory",  opt_stringptr,
  81       (void *)offsetof(redirect_router_options_block,  include_directory) },
  82   { "modemask",           opt_octint,
  83       (void *)offsetof(redirect_router_options_block, modemask) },
  84   { "one_time",           opt_bool,
  85       (void *)offsetof(redirect_router_options_block, one_time) },
  86   { "owners",             opt_uidlist,
  87       (void *)offsetof(redirect_router_options_block, owners) },
  88   { "owngroups",          opt_gidlist,
  89       (void *)offsetof(redirect_router_options_block, owngroups) },
  90   { "pipe_transport",     opt_stringptr,
  91       (void *)offsetof(redirect_router_options_block, pipe_transport_name) },
  92   { "qualify_domain",     opt_stringptr,
  93       (void *)offsetof(redirect_router_options_block, qualify_domain) },
  94   { "qualify_preserve_domain", opt_bool,
  95       (void *)offsetof(redirect_router_options_block, qualify_preserve_domain) },
  96   { "repeat_use",         opt_bool | opt_public,
  97       (void *)offsetof(router_instance, repeat_use) },
  98   { "reply_transport",    opt_stringptr,
  99       (void *)offsetof(redirect_router_options_block, reply_transport_name) },
 100   { "rewrite",            opt_bit | (RDON_REWRITE << 16),
 101       (void *)offsetof(redirect_router_options_block, bit_options) },
 102   { "sieve_enotify_mailto_owner", opt_stringptr,
 103       (void *)offsetof(redirect_router_options_block, sieve_enotify_mailto_owner) },
 104   { "sieve_subaddress", opt_stringptr,
 105       (void *)offsetof(redirect_router_options_block, sieve_subaddress) },
 106   { "sieve_useraddress", opt_stringptr,
 107       (void *)offsetof(redirect_router_options_block, sieve_useraddress) },
 108   { "sieve_vacation_directory", opt_stringptr,
 109       (void *)offsetof(redirect_router_options_block, sieve_vacation_directory) },
 110   { "skip_syntax_errors", opt_bool,
 111       (void *)offsetof(redirect_router_options_block, skip_syntax_errors) },
 112 #ifdef EXPERIMENTAL_SRS
 113   { "srs",                opt_stringptr,
 114       (void *)offsetof(redirect_router_options_block, srs) },
 115   { "srs_alias",          opt_stringptr,
 116       (void *)offsetof(redirect_router_options_block, srs_alias) },
 117   { "srs_condition",      opt_stringptr,
 118       (void *)offsetof(redirect_router_options_block, srs_condition) },
 119   { "srs_dbinsert",       opt_stringptr,
 120       (void *)offsetof(redirect_router_options_block, srs_dbinsert) },
 121   { "srs_dbselect",       opt_stringptr,
 122       (void *)offsetof(redirect_router_options_block, srs_dbselect) },
 123 #endif
 124   { "syntax_errors_text", opt_stringptr,
 125       (void *)offsetof(redirect_router_options_block, syntax_errors_text) },
 126   { "syntax_errors_to",   opt_stringptr,
 127       (void *)offsetof(redirect_router_options_block, syntax_errors_to) }
 128 };
 129
 130 /* Size of the options list. An extern variable has to be used so that its
 131 address can appear in the tables drtables.c. */
 132
 133 int redirect_router_options_count =
 134   sizeof(redirect_router_options)/sizeof(optionlist);
 135
 136
 137 #ifdef MACRO_PREDEF
 138
 139 /* Dummy entries */
 140 redirect_router_options_block redirect_router_option_defaults = {0};
 141 void redirect_router_init(router_instance *rblock) {}
 142 int redirect_router_entry(router_instance *rblock, address_item *addr,
 143   struct passwd *pw, int verify, address_item **addr_local,
 144   address_item **addr_remote, address_item **addr_new,
 145   address_item **addr_succeed) {return 0;}
 146
 147 #else   /*!MACRO_PREDEF*/
 148
 149
 150
 151 /* Default private options block for the redirect router. */
 152
 153 redirect_router_options_block redirect_router_option_defaults = {
 154   NULL,        /* directory_transport */
 155   NULL,        /* file_transport */
 156   NULL,        /* pipe_transport */
 157   NULL,        /* reply_transport */
 158   NULL,        /* data */
 159   NULL,        /* directory_transport_name */
 160   NULL,        /* file */
 161   NULL,        /* file_dir */
 162   NULL,        /* file_transport_name */
 163   NULL,        /* include_directory */
 164   NULL,        /* pipe_transport_name */
 165   NULL,        /* reply_transport_name */
 166   NULL,        /* sieve_subaddress */
 167   NULL,        /* sieve_useraddress */
 168   NULL,        /* sieve_vacation_directory */
 169   NULL,        /* sieve_enotify_mailto_owner */
 170   NULL,        /* syntax_errors_text */
 171   NULL,        /* syntax_errors_to */
 172   NULL,        /* qualify_domain */
 173   NULL,        /* owners */
 174   NULL,        /* owngroups */
 175 #ifdef EXPERIMENTAL_SRS
 176   NULL,        /* srs */
 177   NULL,        /* srs_alias */
 178   NULL,        /* srs_condition */
 179   NULL,        /* srs_dbinsert */
 180   NULL,        /* srs_dbselect */
 181 #endif
 182   022,         /* modemask */
 183   RDO_REWRITE | RDO_PREPEND_HOME, /* bit_options */
 184   FALSE,       /* check_ancestor */
 185   TRUE_UNSET,  /* check_owner */
 186   TRUE_UNSET,  /* check_group */
 187   FALSE,       /* forbid_file */
 188   FALSE,       /* forbid_filter_reply */
 189   FALSE,       /* forbid_pipe */
 190   FALSE,       /* forbid_smtp_code */
 191   FALSE,       /* hide_child_in_errmsg */
 192   FALSE,       /* one_time */
 193   FALSE,       /* qualify_preserve_domain */
 194   FALSE        /* skip_syntax_errors */
 195 };
 196
 197
 198
 199 /*************************************************
 200 *          Initialization entry point            *
 201 *************************************************/
 202
 203 /* Called for each instance, after its options have been read, to enable
 204 consistency checks to be done, or anything else that needs to be set up. */
 205
 206 void redirect_router_init(router_instance *rblock)
 207 {
 208 redirect_router_options_block *ob =
 209   (redirect_router_options_block *)(rblock->options_block);
 210
 211 /* Either file or data must be set, but not both */
 212
 213 if ((ob->file == NULL) == (ob->data == NULL))
 214   log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s router:\n  "
 215     "%sone of \"file\" or \"data\" must be specified",
 216     rblock->name, (ob->file == NULL)? "" : "only ");
 217
 218 /* Onetime aliases can only be real addresses. Headers can't be manipulated.
 219 The combination of one_time and unseen is not allowed. We can't check the
 220 expansion of "unseen" here, but we assume that if it is set to anything other
 221 than false, there is likely to be a problem. */
 222
 223 if (ob->one_time)
 224   {
 225   ob->forbid_pipe = ob->forbid_file = ob->forbid_filter_reply = TRUE;
 226   if (rblock->extra_headers || rblock->remove_headers)
 227     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s router:\n  "
 228       "\"headers_add\" and \"headers_remove\" are not permitted with "
 229       "\"one_time\"", rblock->name);
 230   if (rblock->unseen || rblock->expand_unseen)
 231     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s router:\n  "
 232       "\"unseen\" may not be used with \"one_time\"", rblock->name);
 233   }
 234
 235 /* The defaults for check_owner and check_group depend on other settings. The
 236 defaults are: Check the owner if check_local_user or owners is set; check the
 237 group if check_local_user is set without a restriction on the group write bit,
 238 or if owngroups is set. */
 239
 240 if (ob->check_owner == TRUE_UNSET)
 241   ob->check_owner = rblock->check_local_user ||
 242                     (ob->owners && ob->owners[0] != 0);
 243
 244 if (ob->check_group == TRUE_UNSET)
 245   ob->check_group = (rblock->check_local_user && (ob->modemask & 020) == 0) ||
 246                     (ob->owngroups != NULL && ob->owngroups[0] != 0);
 247
 248 /* If explicit qualify domain set, the preserve option is locked out */
 249
 250 if (ob->qualify_domain && ob->qualify_preserve_domain)
 251   log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s router:\n  "
 252     "only one of \"qualify_domain\" or \"qualify_preserve_domain\" must be set",
 253     rblock->name);
 254
 255 /* If allow_filter is set, either user or check_local_user must be set. */
 256
 257 if (!rblock->check_local_user &&
 258     !rblock->uid_set &&
 259     rblock->expand_uid == NULL &&
 260     (ob->bit_options & RDO_FILTER) != 0)
 261   log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s router:\n  "
 262     "\"user\" or \"check_local_user\" must be set with \"allow_filter\"",
 263     rblock->name);
 264 }
 265
 266
 267
 268 /*************************************************
 269 *       Get errors address and header mods       *
 270 *************************************************/
 271
 272 /* This function is called when new addresses are generated, in order to
 273 sort out errors address and header modifications. We put the errors address
 274 into the parent address (even though it is never used from there because that
 275 address is never transported) so that it can be retrieved if any of the
 276 children gets routed by an "unseen" router. The clone of the child that is
 277 passed on must have the original errors_address value.
 278
 279 Arguments:
 280   rblock               the router control block
 281   addr                 the address being routed
 282   verify               v_none/v_recipient/v_sender/v_expn
 283   addr_prop            point to the propagated block, which is where the
 284                          new values are to be placed
 285
 286 Returns:    the result of rf_get_errors_address() or rf_get_munge_headers(),
 287             which is either OK or DEFER
 288 */
 289
 290 static int
 291 sort_errors_and_headers(router_instance *rblock, address_item *addr,
 292   int verify, address_item_propagated *addr_prop)
 293 {
 294 int frc = rf_get_errors_address(addr, rblock, verify,
 295   &addr_prop->errors_address);
 296 if (frc != OK) return frc;
 297 addr->prop.errors_address = addr_prop->errors_address;
 298 return rf_get_munge_headers(addr, rblock, &addr_prop->extra_headers,
 299   &addr_prop->remove_headers);
 300 }
 301
 302
 303
 304 /*************************************************
 305 *    Process a set of generated new addresses    *
 306 *************************************************/
 307
 308 /* This function sets up a set of newly generated child addresses and puts them
 309 on the new address chain. Copy in the uid, gid and permission flags for use by
 310 pipes and files, set the parent, and "or" its af_ignore_error flag. Also record
 311 the setting for any starting router.
 312
 313 If the generated address is the same as one of its ancestors, and the
 314 check_ancestor flag is set, do not use this generated address, but replace it
 315 with a copy of the input address. This is to cope with cases where A is aliased
 316 to B and B has a .forward file pointing to A, though it is usually set on the
 317 forwardfile rather than the aliasfile. We can't just pass on the old
 318 address by returning FAIL, because it must act as a general parent for
 319 generated addresses, and only get marked "done" when all its children are
 320 delivered.
 321
 322 Arguments:
 323   rblock                  router block
 324   addr_new                new address chain
 325   addr                    original address
 326   generated               list of generated addresses
 327   addr_prop               the propagated block, containing the errors_address,
 328                             header modification stuff, and address_data
 329   ugidptr                 points to uid/gid data for files, pipes, autoreplies
 330   pw                      password entry, set if ob->check_local_user is TRUE
 331
 332 Returns:         nothing
 333 */
 334
 335 static void
 336 add_generated(router_instance *rblock, address_item **addr_new,
 337   address_item *addr, address_item *generated,
 338   address_item_propagated *addr_prop, ugid_block *ugidptr, struct passwd *pw)
 339 {
 340 redirect_router_options_block *ob =
 341   (redirect_router_options_block *)(rblock->options_block);
 342
 343 while (generated)
 344   {
 345   address_item *parent;
 346   address_item *next = generated;
 347   uschar *errors_address = next->prop.errors_address;
 348
 349   generated = next->next;
 350   next->parent = addr;
 351   next->start_router = rblock->redirect_router;
 352   if (addr->child_count == USHRT_MAX)
 353     log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s router generated more than %d "
 354       "child addresses for <%s>", rblock->name, USHRT_MAX, addr->address);
 355   addr->child_count++;
 356
 357   next->next = *addr_new;
 358   *addr_new = next;
 359
 360   /* Don't do the "one_time" thing for the first pass of a 2-stage queue run. */
 361
 362   if (ob->one_time && !f.queue_2stage)
 363     {
 364     for (parent = addr; parent->parent; parent = parent->parent) ;
 365     next->onetime_parent = parent->address;
 366     }
 367
 368   if (ob->hide_child_in_errmsg) setflag(next, af_hide_child);
 369
 370   /* If check_ancestor is set, we want to know if any ancestor of this address
 371   is the address we are about to generate. The check must be done caselessly
 372   unless the ancestor was routed by a case-sensitive router. */
 373
 374   if (ob->check_ancestor)
 375     for (parent = addr; parent; parent = parent->parent)
 376       if ((parent->router && parent->router->caseful_local_part
 377            ? Ustrcmp(next->address, parent->address)
 378            : strcmpic(next->address, parent->address)
 379           ) == 0)
 380         {
 381         DEBUG(D_route) debug_printf("generated parent replaced by child\n");
 382         next->address = string_copy(addr->address);
 383         break;
 384         }
 385
 386   /* A user filter may, under some circumstances, set up an errors address.
 387   If so, we must take care to re-instate it when we copy in the propagated
 388   data so that it overrides any errors_to setting on the router. */
 389
 390     {
 391     BOOL ignore_error = next->prop.ignore_error;
 392     next->prop = *addr_prop;
 393     next->prop.ignore_error = ignore_error || addr->prop.ignore_error;
 394     }
 395   if (errors_address) next->prop.errors_address = errors_address;
 396
 397   /* For pipes, files, and autoreplies, record this router as handling them,
 398   because they don't go through the routing process again. Then set up uid,
 399   gid, home and current directories for transporting. */
 400
 401   if (testflag(next, af_pfr))
 402     {
 403     next->router = rblock;
 404     rf_set_ugid(next, ugidptr);   /* Will contain pw values if not overridden */
 405
 406     /* When getting the home directory out of the password information, wrap it
 407     in \N...\N to avoid expansion later. In Cygwin, home directories can
 408     contain $ characters. */
 409
 410     if (rblock->home_directory != NULL)
 411       next->home_dir = rblock->home_directory;
 412     else if (rblock->check_local_user)
 413       next->home_dir = string_sprintf("\\N%s\\N", pw->pw_dir);
 414     else if (rblock->router_home_directory != NULL &&
 415              testflag(addr, af_home_expanded))
 416       {
 417       next->home_dir = deliver_home;
 418       setflag(next, af_home_expanded);
 419       }
 420
 421     next->current_dir = rblock->current_directory;
 422
 423     /* Permission options */
 424
 425     if (!ob->forbid_pipe) setflag(next, af_allow_pipe);
 426     if (!ob->forbid_file) setflag(next, af_allow_file);
 427     if (!ob->forbid_filter_reply) setflag(next, af_allow_reply);
 428
 429     /* If the transport setting fails, the error gets picked up at the outer
 430     level from the setting of basic_errno in the address. */
 431
 432     if (next->address[0] == '|')
 433       {
 434       address_pipe = next->address;
 435       if (rf_get_transport(ob->pipe_transport_name, &(ob->pipe_transport),
 436           next, rblock->name, US"pipe_transport"))
 437         next->transport = ob->pipe_transport;
 438       address_pipe = NULL;
 439       }
 440     else if (next->address[0] == '>')
 441       {
 442       if (rf_get_transport(ob->reply_transport_name, &(ob->reply_transport),
 443           next, rblock->name, US"reply_transport"))
 444         next->transport = ob->reply_transport;
 445       }
 446     else  /* must be file or directory */
 447       {
 448       int len = Ustrlen(next->address);
 449       address_file = next->address;
 450       if (next->address[len-1] == '/')
 451         {
 452         if (rf_get_transport(ob->directory_transport_name,
 453             &(ob->directory_transport), next, rblock->name,
 454             US"directory_transport"))
 455           next->transport = ob->directory_transport;
 456         }
 457       else
 458         {
 459         if (rf_get_transport(ob->file_transport_name, &(ob->file_transport),
 460             next, rblock->name, US"file_transport"))
 461           next->transport = ob->file_transport;
 462         }
 463       address_file = NULL;
 464       }
 465     }
 466
 467 #ifdef SUPPORT_I18N
 468     if (!next->prop.utf8_msg)
 469       next->prop.utf8_msg = string_is_utf8(next->address)
 470         || (sender_address && string_is_utf8(sender_address));
 471 #endif
 472
 473   DEBUG(D_route)
 474     {
 475     debug_printf("%s router generated %s\n  %serrors_to=%s transport=%s\n",
 476       rblock->name,
 477       next->address,
 478       testflag(next, af_pfr)? "pipe, file, or autoreply\n  " : "",
 479       next->prop.errors_address,
 480       (next->transport == NULL)? US"NULL" : next->transport->name);
 481
 482     if (testflag(next, af_uid_set))
 483       debug_printf("  uid=%ld ", (long int)(next->uid));
 484     else
 485       debug_printf("  uid=unset ");
 486
 487     if (testflag(next, af_gid_set))
 488       debug_printf("gid=%ld ", (long int)(next->gid));
 489     else
 490       debug_printf("gid=unset ");
 491
 492 #ifdef SUPPORT_I18N
 493     if (next->prop.utf8_msg) debug_printf("utf8 ");
 494 #endif
 495
 496     debug_printf("home=%s\n", next->home_dir);
 497     }
 498   }
 499 }
 500
 501
 502 /*************************************************
 503 *              Main entry point                  *
 504 *************************************************/
 505
 506 /* See local README for interface description. This router returns:
 507
 508 DECLINE
 509   . empty address list, or filter did nothing significant
 510
 511 DEFER
 512   . verifying the errors address caused a deferment or a big disaster such
 513       as an expansion failure (rf_get_errors_address)
 514   . expanding a headers_{add,remove} string caused a deferment or another
 515       expansion error (rf_get_munge_headers)
 516   . :defer: or "freeze" in a filter
 517   . error in address list or filter
 518   . skipped syntax errors, but failed to send the message
 519
 520 DISCARD
 521   . address was :blackhole:d or "seen finish"ed
 522
 523 FAIL
 524   . :fail:
 525
 526 OK
 527   . new addresses added to addr_new
 528 */
 529
 530 int redirect_router_entry(
 531   router_instance *rblock,        /* data for this instantiation */
 532   address_item *addr,             /* address we are working on */
 533   struct passwd *pw,              /* passwd entry after check_local_user */
 534   int verify,                     /* v_none/v_recipient/v_sender/v_expn */
 535   address_item **addr_local,      /* add it to this if it's local */
 536   address_item **addr_remote,     /* add it to this if it's remote */
 537   address_item **addr_new,        /* put new addresses on here */
 538   address_item **addr_succeed)    /* put old address here on success */
 539 {
 540 redirect_router_options_block *ob =
 541   (redirect_router_options_block *)(rblock->options_block);
 542 address_item *generated = NULL;
 543 const uschar *save_qualify_domain_recipient = qualify_domain_recipient;
 544 uschar *discarded = US"discarded";
 545 address_item_propagated addr_prop;
 546 error_block *eblock = NULL;
 547 ugid_block ugid;
 548 redirect_block redirect;
 549 int filtertype = FILTER_UNSET;
 550 int yield = OK;
 551 int options = ob->bit_options;
 552 int frc = 0;
 553 int xrc = 0;
 554
 555 addr_local = addr_local;     /* Keep picky compilers happy */
 556 addr_remote = addr_remote;
 557
 558 /* Initialize the data to be propagated to the children */
 559
 560 addr_prop.address_data = deliver_address_data;
 561 addr_prop.domain_data = deliver_domain_data;
 562 addr_prop.localpart_data = deliver_localpart_data;
 563 addr_prop.errors_address = NULL;
 564 addr_prop.extra_headers = NULL;
 565 addr_prop.remove_headers = NULL;
 566 addr_prop.variables = NULL;
 567 tree_dup((tree_node **)&addr_prop.variables, addr->prop.variables);
 568
 569 #ifdef EXPERIMENTAL_SRS
 570 addr_prop.srs_sender = NULL;
 571 #endif
 572 #ifdef SUPPORT_I18N
 573 addr_prop.utf8_msg = addr->prop.utf8_msg;
 574 addr_prop.utf8_downcvt = addr->prop.utf8_downcvt;
 575 addr_prop.utf8_downcvt_maybe = addr->prop.utf8_downcvt_maybe;
 576 #endif
 577
 578
 579 /* When verifying and testing addresses, the "logwrite" command in filters
 580 must be bypassed. */
 581
 582 if (verify == v_none && !f.address_test_mode) options |= RDO_REALLOG;
 583
 584 /* Sort out the fixed or dynamic uid/gid. This uid is used (a) for reading the
 585 file (and interpreting a filter) and (b) for running the transports for
 586 generated file and pipe addresses. It is not (necessarily) the same as the uids
 587 that may own the file. Exim panics if an expanded string is not a number and
 588 can't be found in the password file. Other errors set the freezing bit. */
 589
 590 if (!rf_get_ugid(rblock, addr, &ugid)) return DEFER;
 591
 592 if (!ugid.uid_set && pw != NULL)
 593   {
 594   ugid.uid = pw->pw_uid;
 595   ugid.uid_set = TRUE;
 596   }
 597
 598 if (!ugid.gid_set && pw != NULL)
 599   {
 600   ugid.gid = pw->pw_gid;
 601   ugid.gid_set = TRUE;
 602   }
 603
 604 #ifdef EXPERIMENTAL_SRS
 605   /* Perform SRS on recipient/return-path as required  */
 606
 607   if(ob->srs != NULL)
 608   {
 609     BOOL usesrs = TRUE;
 610
 611     if(ob->srs_condition != NULL)
 612       usesrs = expand_check_condition(ob->srs_condition, "srs_condition expansion failed", NULL);
 613
 614     if(usesrs)
 615     {
 616       int srs_action = 0, n_srs;
 617       uschar *res;
 618       uschar *usedomain;
 619
 620       /* What are we doing? */
 621       if(Ustrcmp(ob->srs, "forward") == 0)
 622         srs_action = 1;
 623       else if(Ustrcmp(ob->srs, "reverseandforward") == 0)
 624       {
 625         srs_action = 3;
 626
 627         if((ob->srs_dbinsert == NULL) ^ (ob->srs_dbselect == NULL))
 628           return DEFER;
 629       }
 630       else if(Ustrcmp(ob->srs, "reverse") == 0)
 631         srs_action = 2;
 632
 633       /* Reverse SRS */
 634       if(srs_action & 2)
 635       {
 636         srs_orig_recipient = addr->address;
 637
 638         eximsrs_init();
 639         if(ob->srs_dbselect)
 640           eximsrs_db_set(TRUE, ob->srs_dbselect);
 641 /* Comment this out for now...
 642 //        else
 643 //          eximsrs_db_set(TRUE, NULL);
 644 */
 645
 646         if((n_srs = eximsrs_reverse(&res, addr->address)) == OK)
 647         {
 648           srs_recipient = res;
 649           DEBUG(D_any)
 650             debug_printf("SRS (reverse): Recipient '%s' rewritten to '%s'\n", srs_orig_recipient, srs_recipient);
 651         }
 652
 653         eximsrs_done();
 654
 655         if(n_srs != OK)
 656           return n_srs;
 657       }
 658
 659       /* Forward SRS */
 660       /* No point in actually performing SRS if we are just verifying a recipient */
 661       if((srs_action & 1) && verify == v_none &&
 662          (sender_address ? sender_address[0] != 0 : FALSE))
 663       {
 664
 665         srs_orig_sender = sender_address;
 666         eximsrs_init();
 667         if(ob->srs_dbinsert)
 668           eximsrs_db_set(FALSE, ob->srs_dbinsert);
 669 /* Comment this out for now...
 670 //        else
 671 //          eximsrs_db_set(FALSE, NULL);
 672 */
 673
 674         if (!(usedomain = ob->srs_alias ? expand_string(ob->srs_alias) : NULL))
 675           usedomain = string_copy(deliver_domain);
 676
 677         if((n_srs = eximsrs_forward(&res, sender_address, usedomain)) == OK)
 678         {
 679           addr_prop.srs_sender = res;
 680           DEBUG(D_any)
 681             debug_printf("SRS (forward): Sender '%s' rewritten to '%s'\n", srs_orig_sender, res);
 682         }
 683
 684         eximsrs_done();
 685
 686         if(n_srs != OK)
 687           return n_srs;
 688       }
 689     }
 690   }
 691 #endif
 692
 693 /* Call the function that interprets redirection data, either inline or from a
 694 file. This is a separate function so that the system filter can use it. It will
 695 run the function in a subprocess if necessary. If qualify_preserve_domain is
 696 set, temporarily reset qualify_domain_recipient to the current domain so that
 697 any unqualified addresses get qualified with the same domain as the incoming
 698 address. Otherwise, if a local qualify_domain is provided, set that up. */
 699
 700 if (ob->qualify_preserve_domain)
 701   qualify_domain_recipient = addr->domain;
 702 else if (ob->qualify_domain)
 703   {
 704   uschar *new_qdr = rf_expand_data(addr, ob->qualify_domain, &xrc);
 705   if (!new_qdr) return xrc;
 706   qualify_domain_recipient = new_qdr;
 707   }
 708
 709 redirect.owners = ob->owners;
 710 redirect.owngroups = ob->owngroups;
 711 redirect.modemask = ob->modemask;
 712 redirect.check_owner = ob->check_owner;
 713 redirect.check_group = ob->check_group;
 714 redirect.pw = pw;
 715
 716 redirect.string = (redirect.isfile = (ob->file != NULL))
 717   ? ob->file : ob->data;
 718
 719 frc = rda_interpret(&redirect, options, ob->include_directory,
 720   ob->sieve_vacation_directory, ob->sieve_enotify_mailto_owner,
 721   ob->sieve_useraddress, ob->sieve_subaddress, &ugid, &generated,
 722   &(addr->message), ob->skip_syntax_errors? &eblock : NULL, &filtertype,
 723   string_sprintf("%s router (recipient is %s)", rblock->name, addr->address));
 724
 725 qualify_domain_recipient = save_qualify_domain_recipient;
 726
 727 /* Handle exceptional returns from filtering or processing an address list.
 728 For FAIL and FREEZE we honour any previously set up deliveries by a filter. */
 729
 730 switch (frc)
 731   {
 732   case FF_NONEXIST:
 733     addr->message = addr->user_message = NULL;
 734     return DECLINE;
 735
 736   case FF_BLACKHOLE:
 737     DEBUG(D_route) debug_printf("address :blackhole:d\n");
 738     generated = NULL;
 739     discarded = US":blackhole:";
 740     frc = FF_DELIVERED;
 741     break;
 742
 743     /* FF_DEFER and FF_FAIL can arise only as a result of explicit commands
 744     (:defer: or :fail: in an alias file or "fail" in a filter). If a configured
 745     message was supplied, allow it to be included in an SMTP response after
 746     verifying. Remove any SMTP code if it is not allowed. */
 747
 748   case FF_DEFER:
 749     yield = DEFER;
 750     goto SORT_MESSAGE;
 751
 752   case FF_FAIL:
 753     if ((xrc = sort_errors_and_headers(rblock, addr, verify, &addr_prop)) != OK)
 754       return xrc;
 755     add_generated(rblock, addr_new, addr, generated, &addr_prop, &ugid, pw);
 756     yield = FAIL;
 757
 758     SORT_MESSAGE:
 759     if (!addr->message)
 760       addr->message = yield == FAIL ? US"forced rejection" : US"forced defer";
 761     else
 762       {
 763       int ovector[3];
 764       if (ob->forbid_smtp_code &&
 765           pcre_exec(regex_smtp_code, NULL, CS addr->message,
 766             Ustrlen(addr->message), 0, PCRE_EOPT,
 767             ovector, sizeof(ovector)/sizeof(int)) >= 0)
 768         {
 769         DEBUG(D_route) debug_printf("SMTP code at start of error message "
 770           "is ignored because forbid_smtp_code is set\n");
 771         addr->message += ovector[1];
 772         }
 773       addr->user_message = addr->message;
 774       setflag(addr, af_pass_message);
 775       }
 776     return yield;
 777
 778     /* As in the case of a system filter, a freeze does not happen after a manual
 779     thaw. In case deliveries were set up by the filter, we set the child count
 780     high so that their completion does not mark the original address done. */
 781
 782   case FF_FREEZE:
 783     if (!f.deliver_manual_thaw)
 784       {
 785       if ((xrc = sort_errors_and_headers(rblock, addr, verify, &addr_prop))
 786         != OK) return xrc;
 787       add_generated(rblock, addr_new, addr, generated, &addr_prop, &ugid, pw);
 788       if (addr->message == NULL) addr->message = US"frozen by filter";
 789       addr->special_action = SPECIAL_FREEZE;
 790       addr->child_count = 9999;
 791       return DEFER;
 792       }
 793     frc = FF_NOTDELIVERED;
 794     break;
 795
 796     /* Handle syntax errors and :include: failures and lookup defers */
 797
 798   case FF_ERROR:
 799   case FF_INCLUDEFAIL:
 800
 801     /* If filtertype is still FILTER_UNSET, it means that the redirection data
 802     was never inspected, so the error was an expansion failure or failure to open
 803     the file, or whatever. In these cases, the existing error message is probably
 804     sufficient. */
 805
 806     if (filtertype == FILTER_UNSET) return DEFER;
 807
 808     /* If it was a filter and skip_syntax_errors is set, we want to set up
 809     the error message so that it can be logged and mailed to somebody. */
 810
 811     if (filtertype != FILTER_FORWARD && ob->skip_syntax_errors)
 812       {
 813       eblock = store_get(sizeof(error_block), FALSE);
 814       eblock->next = NULL;
 815       eblock->text1 = addr->message;
 816       eblock->text2 = NULL;
 817       addr->message = addr->user_message = NULL;
 818       }
 819
 820     /* Otherwise set up the error for the address and defer. */
 821
 822     else
 823       {
 824       addr->basic_errno = ERRNO_BADREDIRECT;
 825       addr->message = string_sprintf("error in %s %s: %s",
 826         filtertype == FILTER_FORWARD ? "redirect" : "filter",
 827         ob->data ? "data" : "file",
 828         addr->message);
 829       return DEFER;
 830       }
 831   }
 832
 833
 834 /* Yield is either FF_DELIVERED (significant action) or FF_NOTDELIVERED (no
 835 significant action). Before dealing with these, however, we must handle the
 836 effect of skip_syntax_errors.
 837
 838 If skip_syntax_errors was set and there were syntax errors in an address list,
 839 error messages will be present in eblock. Log them and send a message if so
 840 configured. We cannot do this earlier, because the error message must not be
 841 sent as the local user. If there were no valid addresses, generated will be
 842 NULL. In this case, the router declines.
 843
 844 For a filter file, the error message has been fudged into an eblock. After
 845 dealing with it, the router declines. */
 846
 847 if (eblock != NULL)
 848   {
 849   if (!moan_skipped_syntax_errors(
 850         rblock->name,                            /* For message content */
 851         eblock,                                  /* Ditto */
 852         (verify != v_none || f.address_test_mode)?
 853           NULL : ob->syntax_errors_to,           /* Who to mail */
 854         generated != NULL,                       /* True if not all failed */
 855         ob->syntax_errors_text))                 /* Custom message */
 856     return DEFER;
 857
 858   if (filtertype != FILTER_FORWARD || generated == NULL)
 859     {
 860     addr->message = US"syntax error in redirection data";
 861     return DECLINE;
 862     }
 863   }
 864
 865 /* Sort out the errors address and any header modifications, and handle the
 866 generated addresses, if any. If there are no generated addresses, we must avoid
 867 calling sort_errors_and_headers() in case this router declines - that function
 868 may modify the errors_address field in the current address, and we don't want
 869 to do that for a decline. */
 870
 871 if (generated != NULL)
 872   {
 873   if ((xrc = sort_errors_and_headers(rblock, addr, verify, &addr_prop)) != OK)
 874     return xrc;
 875   add_generated(rblock, addr_new, addr, generated, &addr_prop, &ugid, pw);
 876   }
 877
 878 /* FF_DELIVERED with no generated addresses is what we get when an address list
 879 contains :blackhole: or a filter contains "seen finish" without having
 880 generated anything. Log what happened to this address, and return DISCARD. */
 881
 882 if (frc == FF_DELIVERED)
 883   {
 884   if (generated == NULL && verify == v_none && !f.address_test_mode)
 885     {
 886     log_write(0, LOG_MAIN, "=> %s <%s> R=%s", discarded, addr->address,
 887       rblock->name);
 888     yield = DISCARD;
 889     }
 890   }
 891
 892 /* For an address list, FF_NOTDELIVERED always means that no addresses were
 893 generated. For a filter, addresses may or may not have been generated. If none
 894 were, it's the same as an empty address list, and the router declines. However,
 895 if addresses were generated, we can't just decline because successful delivery
 896 of the base address gets it marked "done", so deferred generated addresses
 897 never get tried again. We have to generate a new version of the base address,
 898 as if there were a "deliver" command in the filter file, with the original
 899 address as parent. */
 900
 901 else
 902   {
 903   address_item *next;
 904
 905   if (generated == NULL) return DECLINE;
 906
 907   next = deliver_make_addr(addr->address, FALSE);
 908   next->parent = addr;
 909   addr->child_count++;
 910   next->next = *addr_new;
 911   *addr_new = next;
 912
 913   /* Set the data that propagates. */
 914
 915   next->prop = addr_prop;
 916
 917   DEBUG(D_route) debug_printf("%s router autogenerated %s\n%s%s%s",
 918     rblock->name,
 919     next->address,
 920     (addr_prop.errors_address != NULL)? "  errors to " : "",
 921     (addr_prop.errors_address != NULL)? addr_prop.errors_address : US"",
 922     (addr_prop.errors_address != NULL)? "\n" : "");
 923   }
 924
 925 /* Control gets here only when the address has been completely handled. Put the
 926 original address onto the succeed queue so that any retry items that get
 927 attached to it get processed. */
 928
 929 addr->next = *addr_succeed;
 930 *addr_succeed = addr;
 931
 932 return yield;
 933 }
 934
 935 #endif   /*!MACRO_PREDEF*/
 936 /* End of routers/redirect.c */