src/src/drtables.c

   1 /*************************************************
   2 *     Exim - an Internet mail transport agent    *
   3 *************************************************/
   4
   5 /* Copyright (c) University of Cambridge 1995 - 2016 */
   6 /* See the file NOTICE for conditions of use and distribution. */
   7
   8
   9 #include "exim.h"
  10
  11 #include <string.h>
  12
  13 /* This module contains tables that define the lookup methods and drivers
  14 that are actually included in the binary. Its contents are controlled by
  15 various macros in config.h that ultimately come from Local/Makefile. They are
  16 all described in src/EDITME. */
  17
  18
  19 lookup_info **lookup_list;
  20 int lookup_list_count = 0;
  21
  22 static int lookup_list_init_done = 0;
  23
  24 /* Table of information about all possible authentication mechamisms. All
  25 entries are always present if any mechanism is declared, but the functions are
  26 set to NULL for those that are not compiled into the binary. */
  27
  28 #ifdef AUTH_CRAM_MD5
  29 #include "auths/cram_md5.h"
  30 #endif
  31
  32 #ifdef AUTH_CYRUS_SASL
  33 #include "auths/cyrus_sasl.h"
  34 #endif
  35
  36 #ifdef AUTH_DOVECOT
  37 #include "auths/dovecot.h"
  38 #endif
  39
  40 #ifdef AUTH_GSASL
  41 #include "auths/gsasl_exim.h"
  42 #endif
  43
  44 #ifdef AUTH_HEIMDAL_GSSAPI
  45 #include "auths/heimdal_gssapi.h"
  46 #endif
  47
  48 #ifdef AUTH_PLAINTEXT
  49 #include "auths/plaintext.h"
  50 #endif
  51
  52 #ifdef AUTH_SPA
  53 #include "auths/spa.h"
  54 #endif
  55
  56 #ifdef AUTH_TLS
  57 #include "auths/tls.h"
  58 #endif
  59
  60 auth_info auths_available[] = {
  61
  62 /* Checking by an expansion condition on plain text */
  63
  64 #ifdef AUTH_CRAM_MD5
  65   {
  66   US"cram_md5",                              /* lookup name */
  67   auth_cram_md5_options,
  68   &auth_cram_md5_options_count,
  69   &auth_cram_md5_option_defaults,
  70   sizeof(auth_cram_md5_options_block),
  71   auth_cram_md5_init,                        /* init function */
  72   auth_cram_md5_server,                      /* server function */
  73   auth_cram_md5_client,                      /* client function */
  74   NULL                                       /* diagnostic function */
  75   },
  76 #endif
  77
  78 #ifdef AUTH_CYRUS_SASL
  79   {
  80   US"cyrus_sasl",           /* lookup name */
  81   auth_cyrus_sasl_options,
  82   &auth_cyrus_sasl_options_count,
  83   &auth_cyrus_sasl_option_defaults,
  84   sizeof(auth_cyrus_sasl_options_block),
  85   auth_cyrus_sasl_init,                      /* init function */
  86   auth_cyrus_sasl_server,                    /* server function */
  87   NULL,                                      /* client function */
  88   auth_cyrus_sasl_version_report             /* diagnostic function */
  89   },
  90 #endif
  91
  92 #ifdef AUTH_DOVECOT
  93   {
  94   US"dovecot",                                /* lookup name */
  95   auth_dovecot_options,
  96   &auth_dovecot_options_count,
  97   &auth_dovecot_option_defaults,
  98   sizeof(auth_dovecot_options_block),
  99   auth_dovecot_init,                          /* init function */
 100   auth_dovecot_server,                        /* server function */
 101   NULL,                                       /* client function */
 102   NULL                                        /* diagnostic function */
 103   },
 104 #endif
 105
 106 #ifdef AUTH_GSASL
 107   {
 108   US"gsasl",                                  /* lookup name */
 109   auth_gsasl_options,
 110   &auth_gsasl_options_count,
 111   &auth_gsasl_option_defaults,
 112   sizeof(auth_gsasl_options_block),
 113   auth_gsasl_init,                            /* init function */
 114   auth_gsasl_server,                          /* server function */
 115   NULL,                                       /* client function */
 116   auth_gsasl_version_report                   /* diagnostic function */
 117   },
 118 #endif
 119
 120 #ifdef AUTH_HEIMDAL_GSSAPI
 121   {
 122   US"heimdal_gssapi",                         /* lookup name */
 123   auth_heimdal_gssapi_options,
 124   &auth_heimdal_gssapi_options_count,
 125   &auth_heimdal_gssapi_option_defaults,
 126   sizeof(auth_heimdal_gssapi_options_block),
 127   auth_heimdal_gssapi_init,                   /* init function */
 128   auth_heimdal_gssapi_server,                 /* server function */
 129   NULL,                                       /* client function */
 130   auth_heimdal_gssapi_version_report          /* diagnostic function */
 131   },
 132 #endif
 133
 134 #ifdef AUTH_PLAINTEXT
 135   {
 136   US"plaintext",                             /* lookup name */
 137   auth_plaintext_options,
 138   &auth_plaintext_options_count,
 139   &auth_plaintext_option_defaults,
 140   sizeof(auth_plaintext_options_block),
 141   auth_plaintext_init,                       /* init function */
 142   auth_plaintext_server,                     /* server function */
 143   auth_plaintext_client,                     /* client function */
 144   NULL                                       /* diagnostic function */
 145   },
 146 #endif
 147
 148 #ifdef AUTH_SPA
 149   {
 150   US"spa",                                   /* lookup name */
 151   auth_spa_options,
 152   &auth_spa_options_count,
 153   &auth_spa_option_defaults,
 154   sizeof(auth_spa_options_block),
 155   auth_spa_init,                             /* init function */
 156   auth_spa_server,                           /* server function */
 157   auth_spa_client,                           /* client function */
 158   NULL                                       /* diagnostic function */
 159   },
 160 #endif
 161
 162 #ifdef AUTH_TLS
 163   {
 164   US"tls",                                   /* lookup name */
 165   auth_tls_options,
 166   &auth_tls_options_count,
 167   &auth_tls_option_defaults,
 168   sizeof(auth_tls_options_block),
 169   auth_tls_init,                             /* init function */
 170   auth_tls_server,                           /* server function */
 171   NULL,                                      /* client function */
 172   NULL                                       /* diagnostic function */
 173   },
 174 #endif
 175
 176 { US"", NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL  }
 177 };
 178
 179
 180 /* Tables of information about which routers and transports are included in the
 181 exim binary. */
 182
 183 /* Pull in the necessary header files */
 184
 185 #include "routers/rf_functions.h"
 186
 187 #ifdef ROUTER_ACCEPT
 188 #include "routers/accept.h"
 189 #endif
 190
 191 #ifdef ROUTER_DNSLOOKUP
 192 #include "routers/dnslookup.h"
 193 #endif
 194
 195 #ifdef ROUTER_MANUALROUTE
 196 #include "routers/manualroute.h"
 197 #endif
 198
 199 #ifdef ROUTER_IPLITERAL
 200 #include "routers/ipliteral.h"
 201 #endif
 202
 203 #ifdef ROUTER_IPLOOKUP
 204 #include "routers/iplookup.h"
 205 #endif
 206
 207 #ifdef ROUTER_QUERYPROGRAM
 208 #include "routers/queryprogram.h"
 209 #endif
 210
 211 #ifdef ROUTER_REDIRECT
 212 #include "routers/redirect.h"
 213 #endif
 214
 215 #ifdef TRANSPORT_APPENDFILE
 216 #include "transports/appendfile.h"
 217 #endif
 218
 219 #ifdef TRANSPORT_AUTOREPLY
 220 #include "transports/autoreply.h"
 221 #endif
 222
 223 #ifdef TRANSPORT_LMTP
 224 #include "transports/lmtp.h"
 225 #endif
 226
 227 #ifdef TRANSPORT_PIPE
 228 #include "transports/pipe.h"
 229 #endif
 230
 231 #ifdef TRANSPORT_SMTP
 232 #include "transports/smtp.h"
 233 #endif
 234
 235
 236 /* Now set up the structures, terminated by an entry with a null name. */
 237
 238 router_info routers_available[] = {
 239 #ifdef ROUTER_ACCEPT
 240   {
 241   US"accept",
 242   accept_router_options,
 243   &accept_router_options_count,
 244   &accept_router_option_defaults,
 245   sizeof(accept_router_options_block),
 246   accept_router_init,
 247   accept_router_entry,
 248   NULL,     /* no tidyup entry */
 249   ri_yestransport
 250   },
 251 #endif
 252 #ifdef ROUTER_DNSLOOKUP
 253   {
 254   US"dnslookup",
 255   dnslookup_router_options,
 256   &dnslookup_router_options_count,
 257   &dnslookup_router_option_defaults,
 258   sizeof(dnslookup_router_options_block),
 259   dnslookup_router_init,
 260   dnslookup_router_entry,
 261   NULL,     /* no tidyup entry */
 262   ri_yestransport
 263   },
 264 #endif
 265 #ifdef ROUTER_IPLITERAL
 266   {
 267   US"ipliteral",
 268   ipliteral_router_options,
 269   &ipliteral_router_options_count,
 270   &ipliteral_router_option_defaults,
 271   sizeof(ipliteral_router_options_block),
 272   ipliteral_router_init,
 273   ipliteral_router_entry,
 274   NULL,     /* no tidyup entry */
 275   ri_yestransport
 276   },
 277 #endif
 278 #ifdef ROUTER_IPLOOKUP
 279   {
 280   US"iplookup",
 281   iplookup_router_options,
 282   &iplookup_router_options_count,
 283   &iplookup_router_option_defaults,
 284   sizeof(iplookup_router_options_block),
 285   iplookup_router_init,
 286   iplookup_router_entry,
 287   NULL,     /* no tidyup entry */
 288   ri_notransport
 289   },
 290 #endif
 291 #ifdef ROUTER_MANUALROUTE
 292   {
 293   US"manualroute",
 294   manualroute_router_options,
 295   &manualroute_router_options_count,
 296   &manualroute_router_option_defaults,
 297   sizeof(manualroute_router_options_block),
 298   manualroute_router_init,
 299   manualroute_router_entry,
 300   NULL,     /* no tidyup entry */
 301   0
 302   },
 303 #endif
 304 #ifdef ROUTER_QUERYPROGRAM
 305   {
 306   US"queryprogram",
 307   queryprogram_router_options,
 308   &queryprogram_router_options_count,
 309   &queryprogram_router_option_defaults,
 310   sizeof(queryprogram_router_options_block),
 311   queryprogram_router_init,
 312   queryprogram_router_entry,
 313   NULL,     /* no tidyup entry */
 314   0
 315   },
 316 #endif
 317 #ifdef ROUTER_REDIRECT
 318   {
 319   US"redirect",
 320   redirect_router_options,
 321   &redirect_router_options_count,
 322   &redirect_router_option_defaults,
 323   sizeof(redirect_router_options_block),
 324   redirect_router_init,
 325   redirect_router_entry,
 326   NULL,     /* no tidyup entry */
 327   ri_notransport
 328   },
 329 #endif
 330 { US"", NULL, NULL, NULL, 0, NULL, NULL, NULL, 0 }
 331 };
 332
 333
 334
 335 transport_info transports_available[] = {
 336 #ifdef TRANSPORT_APPENDFILE
 337   {
 338   US"appendfile",                              /* driver name */
 339   appendfile_transport_options,                /* local options table */
 340   &appendfile_transport_options_count,         /* number of entries */
 341   &appendfile_transport_option_defaults,       /* private options defaults */
 342   sizeof(appendfile_transport_options_block),  /* size of private block */
 343   appendfile_transport_init,                   /* init entry point */
 344   appendfile_transport_entry,                  /* main entry point */
 345   NULL,                                        /* no tidyup entry */
 346   NULL,                                        /* no closedown entry */
 347   TRUE,                                        /* local flag */
 348   },
 349 #endif
 350 #ifdef TRANSPORT_AUTOREPLY
 351   {
 352   US"autoreply",                               /* driver name */
 353   autoreply_transport_options,                 /* local options table */
 354   &autoreply_transport_options_count,          /* number of entries */
 355   &autoreply_transport_option_defaults,        /* private options defaults */
 356   sizeof(autoreply_transport_options_block),   /* size of private block */
 357   autoreply_transport_init,                    /* init entry point */
 358   autoreply_transport_entry,                   /* main entry point */
 359   NULL,                                        /* no tidyup entry */
 360   NULL,                                        /* no closedown entry */
 361   TRUE                                         /* local flag */
 362   },
 363 #endif
 364 #ifdef TRANSPORT_LMTP
 365   {
 366   US"lmtp",                                    /* driver name */
 367   lmtp_transport_options,                      /* local options table */
 368   &lmtp_transport_options_count,               /* number of entries */
 369   &lmtp_transport_option_defaults,             /* private options defaults */
 370   sizeof(lmtp_transport_options_block),        /* size of private block */
 371   lmtp_transport_init,                         /* init entry point */
 372   lmtp_transport_entry,                        /* main entry point */
 373   NULL,                                        /* no tidyup entry */
 374   NULL,                                        /* no closedown entry */
 375   TRUE                                         /* local flag */
 376   },
 377 #endif
 378 #ifdef TRANSPORT_PIPE
 379   {
 380   US"pipe",                                    /* driver name */
 381   pipe_transport_options,                      /* local options table */
 382   &pipe_transport_options_count,               /* number of entries */
 383   &pipe_transport_option_defaults,             /* private options defaults */
 384   sizeof(pipe_transport_options_block),        /* size of private block */
 385   pipe_transport_init,                         /* init entry point */
 386   pipe_transport_entry,                        /* main entry point */
 387   NULL,                                        /* no tidyup entry */
 388   NULL,                                        /* no closedown entry */
 389   TRUE                                         /* local flag */
 390   },
 391 #endif
 392 #ifdef TRANSPORT_SMTP
 393   {
 394   US"smtp",                                    /* driver name */
 395   smtp_transport_options,                      /* local options table */
 396   &smtp_transport_options_count,               /* number of entries */
 397   &smtp_transport_option_defaults,             /* private options defaults */
 398   sizeof(smtp_transport_options_block),        /* size of private block */
 399   smtp_transport_init,                         /* init entry point */
 400   smtp_transport_entry,                        /* main entry point */
 401   NULL,                                        /* no tidyup entry */
 402   smtp_transport_closedown,                    /* close down passed channel */
 403   FALSE                                        /* local flag */
 404   },
 405 #endif
 406 { US"", NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, FALSE }
 407 };
 408
 409 struct lookupmodulestr
 410 {
 411   void *dl;
 412   struct lookup_module_info *info;
 413   struct lookupmodulestr *next;
 414 };
 415
 416 static struct lookupmodulestr *lookupmodules = NULL;
 417
 418 static void
 419 addlookupmodule(void *dl, struct lookup_module_info *info)
 420 {
 421 struct lookupmodulestr *p = store_malloc(sizeof(struct lookupmodulestr));
 422
 423 p->dl = dl;
 424 p->info = info;
 425 p->next = lookupmodules;
 426 lookupmodules = p;
 427 lookup_list_count += info->lookupcount;
 428 }
 429
 430 /* only valid after lookup_list and lookup_list_count are assigned */
 431 static void
 432 add_lookup_to_list(lookup_info *info)
 433 {
 434 /* need to add the lookup to lookup_list, sorted */
 435 int pos = 0;
 436
 437 /* strategy is to go through the list until we find
 438 either an empty spot or a name that is higher.
 439 this can't fail because we have enough space. */
 440
 441 while (lookup_list[pos] && (Ustrcmp(lookup_list[pos]->name, info->name) <= 0))
 442   pos++;
 443
 444 if (lookup_list[pos])
 445   {
 446   /* need to insert it, so move all the other items up
 447   (last slot is still empty, of course) */
 448
 449   memmove(&lookup_list[pos+1],
 450           &lookup_list[pos],
 451           sizeof(lookup_info *) * (lookup_list_count-pos-1));
 452   }
 453 lookup_list[pos] = info;
 454 }
 455
 456
 457 /* These need to be at file level for old versions of gcc (2.95.2 reported),
 458  * which give parse errors on an extern in function scope.  Each entry needs
 459  * to also be invoked in init_lookup_list() below  */
 460
 461 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
 462 extern lookup_module_info cdb_lookup_module_info;
 463 #endif
 464 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
 465 extern lookup_module_info dbmdb_lookup_module_info;
 466 #endif
 467 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
 468 extern lookup_module_info dnsdb_lookup_module_info;
 469 #endif
 470 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
 471 extern lookup_module_info dsearch_lookup_module_info;
 472 #endif
 473 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
 474 extern lookup_module_info ibase_lookup_module_info;
 475 #endif
 476 #if defined(LOOKUP_LDAP)
 477 extern lookup_module_info ldap_lookup_module_info;
 478 #endif
 479 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
 480 extern lookup_module_info lsearch_lookup_module_info;
 481 #endif
 482 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
 483 extern lookup_module_info mysql_lookup_module_info;
 484 #endif
 485 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
 486 extern lookup_module_info nis_lookup_module_info;
 487 #endif
 488 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
 489 extern lookup_module_info nisplus_lookup_module_info;
 490 #endif
 491 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
 492 extern lookup_module_info oracle_lookup_module_info;
 493 #endif
 494 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
 495 extern lookup_module_info passwd_lookup_module_info;
 496 #endif
 497 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
 498 extern lookup_module_info pgsql_lookup_module_info;
 499 #endif
 500 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
 501 extern lookup_module_info redis_lookup_module_info;
 502 #endif
 503 #if defined(EXPERIMENTAL_SPF)
 504 extern lookup_module_info spf_lookup_module_info;
 505 #endif
 506 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
 507 extern lookup_module_info sqlite_lookup_module_info;
 508 #endif
 509 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
 510 extern lookup_module_info testdb_lookup_module_info;
 511 #endif
 512 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
 513 extern lookup_module_info whoson_lookup_module_info;
 514 #endif
 515
 516
 517 void
 518 init_lookup_list(void)
 519 {
 520 #ifdef LOOKUP_MODULE_DIR
 521   DIR *dd;
 522   struct dirent *ent;
 523   int countmodules = 0;
 524   int moduleerrors = 0;
 525 #endif
 526   struct lookupmodulestr *p;
 527
 528   if (lookup_list_init_done)
 529     return;
 530   lookup_list_init_done = 1;
 531
 532 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
 533   addlookupmodule(NULL, &cdb_lookup_module_info);
 534 #endif
 535
 536 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
 537   addlookupmodule(NULL, &dbmdb_lookup_module_info);
 538 #endif
 539
 540 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
 541   addlookupmodule(NULL, &dnsdb_lookup_module_info);
 542 #endif
 543
 544 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
 545   addlookupmodule(NULL, &dsearch_lookup_module_info);
 546 #endif
 547
 548 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
 549   addlookupmodule(NULL, &ibase_lookup_module_info);
 550 #endif
 551
 552 #ifdef LOOKUP_LDAP
 553   addlookupmodule(NULL, &ldap_lookup_module_info);
 554 #endif
 555
 556 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
 557   addlookupmodule(NULL, &lsearch_lookup_module_info);
 558 #endif
 559
 560 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
 561   addlookupmodule(NULL, &mysql_lookup_module_info);
 562 #endif
 563
 564 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
 565   addlookupmodule(NULL, &nis_lookup_module_info);
 566 #endif
 567
 568 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
 569   addlookupmodule(NULL, &nisplus_lookup_module_info);
 570 #endif
 571
 572 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
 573   addlookupmodule(NULL, &oracle_lookup_module_info);
 574 #endif
 575
 576 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
 577   addlookupmodule(NULL, &passwd_lookup_module_info);
 578 #endif
 579
 580 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
 581   addlookupmodule(NULL, &pgsql_lookup_module_info);
 582 #endif
 583
 584 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
 585   addlookupmodule(NULL, &redis_lookup_module_info);
 586 #endif
 587
 588 #ifdef EXPERIMENTAL_SPF
 589   addlookupmodule(NULL, &spf_lookup_module_info);
 590 #endif
 591
 592 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
 593   addlookupmodule(NULL, &sqlite_lookup_module_info);
 594 #endif
 595
 596 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
 597   addlookupmodule(NULL, &testdb_lookup_module_info);
 598 #endif
 599
 600 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
 601   addlookupmodule(NULL, &whoson_lookup_module_info);
 602 #endif
 603
 604 #ifdef LOOKUP_MODULE_DIR
 605   dd = opendir(LOOKUP_MODULE_DIR);
 606   if (dd == NULL) {
 607     DEBUG(D_lookup) debug_printf("Couldn't open %s: not loading lookup modules\n", LOOKUP_MODULE_DIR);
 608     log_write(0, LOG_MAIN, "Couldn't open %s: not loading lookup modules\n", LOOKUP_MODULE_DIR);
 609   }
 610   else {
 611     const pcre *regex_islookupmod = regex_must_compile(
 612       US"\\." DYNLIB_FN_EXT "$", FALSE, TRUE);
 613
 614     DEBUG(D_lookup) debug_printf("Loading lookup modules from %s\n", LOOKUP_MODULE_DIR);
 615     while ((ent = readdir(dd)) != NULL) {
 616       char *name = ent->d_name;
 617       int len = (int)strlen(name);
 618       if (pcre_exec(regex_islookupmod, NULL, name, len, 0, PCRE_EOPT, NULL, 0) >= 0) {
 619         int pathnamelen = len + (int)strlen(LOOKUP_MODULE_DIR) + 2;
 620         void *dl;
 621         struct lookup_module_info *info;
 622         const char *errormsg;
 623
 624         /* SRH: am I being paranoid here or what? */
 625         if (pathnamelen > big_buffer_size) {
 626           fprintf(stderr, "Loading lookup modules: %s/%s: name too long\n", LOOKUP_MODULE_DIR, name);
 627           log_write(0, LOG_MAIN|LOG_PANIC, "%s/%s: name too long\n", LOOKUP_MODULE_DIR, name);
 628           continue;
 629         }
 630
 631         /* SRH: snprintf here? */
 632         sprintf(CS big_buffer, "%s/%s", LOOKUP_MODULE_DIR, name);
 633
 634         dl = dlopen(CS big_buffer, RTLD_NOW);// TJ was LAZY
 635         if (dl == NULL) {
 636           fprintf(stderr, "Error loading %s: %s\n", name, dlerror());
 637           moduleerrors++;
 638           log_write(0, LOG_MAIN|LOG_PANIC, "Error loading lookup module %s: %s\n", name, dlerror());
 639           continue;
 640         }
 641
 642         /* FreeBSD nsdispatch() can trigger dlerror() errors about
 643          * _nss_cache_cycle_prevention_function; we need to clear the dlerror()
 644          * state before calling dlsym(), so that any error afterwards only
 645          * comes from dlsym().
 646          */
 647         errormsg = dlerror();
 648
 649         info = (struct lookup_module_info*) dlsym(dl, "_lookup_module_info");
 650         if ((errormsg = dlerror()) != NULL) {
 651           fprintf(stderr, "%s does not appear to be a lookup module (%s)\n", name, errormsg);
 652           dlclose(dl);
 653           moduleerrors++;
 654           log_write(0, LOG_MAIN|LOG_PANIC, "%s does not appear to be a lookup module (%s)\n", name, errormsg);
 655           continue;
 656         }
 657         if (info->magic != LOOKUP_MODULE_INFO_MAGIC) {
 658           fprintf(stderr, "Lookup module %s is not compatible with this version of Exim\n", name);
 659           dlclose(dl);
 660           moduleerrors++;
 661           log_write(0, LOG_MAIN|LOG_PANIC, "Lookup module %s is not compatible with this version of Exim\n", name);
 662           continue;
 663         }
 664
 665         addlookupmodule(dl, info);
 666         DEBUG(D_lookup) debug_printf("Loaded \"%s\" (%d lookup types)\n", name, info->lookupcount);
 667         countmodules++;
 668       }
 669     }
 670     store_free((void*)regex_islookupmod);
 671     closedir(dd);
 672   }
 673
 674   DEBUG(D_lookup) debug_printf("Loaded %d lookup modules\n", countmodules);
 675 #endif
 676
 677   DEBUG(D_lookup) debug_printf("Total %d lookups\n", lookup_list_count);
 678
 679   lookup_list = store_malloc(sizeof(lookup_info *) * lookup_list_count);
 680   memset(lookup_list, 0, sizeof(lookup_info *) * lookup_list_count);
 681
 682   /* now add all lookups to the real list */
 683   p = lookupmodules;
 684   while (p) {
 685     int j;
 686     struct lookupmodulestr *pnext;
 687
 688     for (j = 0; j < p->info->lookupcount; j++)
 689       add_lookup_to_list(p->info->lookups[j]);
 690
 691     pnext = p->next;
 692     store_free(p);
 693     p = pnext;
 694   }
 695   /* just to be sure */
 696   lookupmodules = NULL;
 697 }
 698
 699 /* End of drtables.c */