src/main/modules.c

   1 /*
   2  * modules.c    Radius module support.
   3  *
   4  * Version:     $Id$
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  *
  20  * Copyright 2003,2006  The FreeRADIUS server project
  21  * Copyright 2000  Alan DeKok <aland@ox.org>
  22  * Copyright 2000  Alan Curry <pacman@world.std.com>
  23  */
  24
  25 #include <freeradius-devel/ident.h>
  26 RCSID("$Id$")
  27
  28 #include <freeradius-devel/radiusd.h>
  29 #include <freeradius-devel/modpriv.h>
  30 #include <freeradius-devel/modcall.h>
  31 #include <freeradius-devel/rad_assert.h>
  32
  33 extern int check_config;
  34
  35 typedef struct indexed_modcallable {
  36         int             comp;
  37         int             idx;
  38         modcallable     *modulelist;
  39 } indexed_modcallable;
  40
  41 typedef struct virtual_server_t {
  42         const char      *name;
  43         time_t          created;
  44         int             can_free;
  45         CONF_SECTION    *cs;
  46         rbtree_t        *components;
  47         modcallable     *mc[RLM_COMPONENT_COUNT];
  48         CONF_SECTION    *subcs[RLM_COMPONENT_COUNT];
  49         struct virtual_server_t *next;
  50 } virtual_server_t;
  51
  52 /*
  53  *      Keep a hash of virtual servers, so that we can reload them.
  54  */
  55 #define VIRTUAL_SERVER_HASH_SIZE (256)
  56 static virtual_server_t *virtual_servers[VIRTUAL_SERVER_HASH_SIZE];
  57
  58 static rbtree_t *module_tree = NULL;
  59
  60 static rbtree_t *instance_tree = NULL;
  61
  62 struct fr_module_hup_t {
  63         module_instance_t       *mi;
  64         time_t                  when;
  65         void                    *insthandle;
  66         fr_module_hup_t         *next;
  67 };
  68
  69
  70 typedef struct section_type_value_t {
  71         const char      *section;
  72         const char      *typename;
  73         int             attr;
  74 } section_type_value_t;
  75
  76 /*
  77  *      Ordered by component
  78  */
  79 static const section_type_value_t section_type_value[RLM_COMPONENT_COUNT] = {
  80         { "authenticate", "Auth-Type",       PW_AUTH_TYPE },
  81         { "authorize",    "Autz-Type",       PW_AUTZ_TYPE },
  82         { "preacct",      "Pre-Acct-Type",   PW_PRE_ACCT_TYPE },
  83         { "accounting",   "Acct-Type",       PW_ACCT_TYPE },
  84         { "session",      "Session-Type",    PW_SESSION_TYPE },
  85         { "pre-proxy",    "Pre-Proxy-Type",  PW_PRE_PROXY_TYPE },
  86         { "post-proxy",   "Post-Proxy-Type", PW_POST_PROXY_TYPE },
  87         { "post-auth",    "Post-Auth-Type",  PW_POST_AUTH_TYPE }
  88 #ifdef WITH_COA
  89         ,
  90         { "recv-coa",     "Recv-CoA-Type",   PW_RECV_COA_TYPE },
  91         { "send-coa",     "Send-CoA-Type",   PW_SEND_COA_TYPE }
  92 #endif
  93 };
  94
  95
  96 #ifdef WITHOUT_LIBLTDL
  97 #ifdef WITH_DLOPEN
  98 #include <dlfcn.h>
  99
 100 #ifndef RTLD_NOW
 101 #define RTLD_NOW (0)
 102 #endif
 103 #ifndef RTLD_LOCAL
 104 #define RTLD_LOCAL (0)
 105 #endif
 106
 107 #define fr_dlopenext lt_dlopenext
 108 #ifndef LT_SHREXT
 109 #ifdef __APPLE__
 110 #define LT_SHREXT ".so"
 111 #elif defined (WIN32)
 112 #define LT_SHREXT ".dll"
 113 #else
 114 #define LT_SHREXT ".dylib"
 115 #endif
 116 #endif
 117
 118 lt_dlhandle lt_dlopenext(const char *name)
 119 {
 120         char buffer[256];
 121
 122         strlcpy(buffer, name, sizeof(buffer));
 123
 124         /*
 125          *      FIXME: Make this configurable...
 126          */
 127         strlcat(buffer, LT_SHREXT, sizeof(buffer));
 128
 129         return dlopen(buffer, RTLD_NOW | RTLD_LOCAL);
 130 }
 131
 132 void *lt_dlsym(lt_dlhandle handle, UNUSED const char *symbol)
 133 {
 134         return dlsym(handle, symbol);
 135 }
 136
 137 int lt_dlclose(lt_dlhandle handle)
 138 {
 139         if (!handle) return 0;
 140
 141         return dlclose(handle);
 142 }
 143
 144 const char *lt_dlerror(void)
 145 {
 146         return dlerror();
 147 }
 148
 149
 150 #else  /* without dlopen */
 151 typedef struct lt_dlmodule_t {
 152   const char    *name;
 153   void          *ref;
 154 } lt_dlmodule_t;
 155
 156 typedef struct eap_type_t EAP_TYPE;
 157 typedef struct rlm_sql_module_t rlm_sql_module_t;
 158
 159 /*
 160  *      FIXME: Write hackery to auto-generate this data.
 161  *      We only need to do this on systems that don't have dlopen.
 162  */
 163 extern module_t rlm_pap;
 164 extern module_t rlm_chap;
 165 extern module_t rlm_eap;
 166 extern module_t rlm_sql;
 167 /* and so on ... */
 168
 169 extern EAP_TYPE rlm_eap_md5;
 170 extern rlm_sql_module_t rlm_sql_mysql;
 171 /* and so on ... */
 172
 173 static const lt_dlmodule_t lt_dlmodules[] = {
 174         { "rlm_pap", &rlm_pap },
 175         { "rlm_chap", &rlm_chap },
 176         { "rlm_eap", &rlm_eap },
 177         /* and so on ... */
 178
 179         { "rlm_eap_md5", &rlm_eap_md5 },
 180         /* and so on ... */
 181
 182         { "rlm_sql_mysql", &rlm_sql_mysql },
 183         /* and so on ... */
 184
 185         { NULL, NULL }
 186 };
 187
 188 #define fr_dlopenext lt_dlopenext
 189 lt_dlhandle lt_dlopenext(const char *name)
 190 {
 191         int i;
 192
 193         for (i = 0; lt_dlmodules[i].name != NULL; i++) {
 194                 if (strcmp(name, lt_dlmodules[i].name) == 0) {
 195                         return lt_dlmodules[i].ref;
 196                 }
 197         }
 198
 199         return NULL;
 200 }
 201
 202 void *lt_dlsym(lt_dlhandle handle, UNUSED const char *symbol)
 203 {
 204         return handle;
 205 }
 206
 207 int lt_dlclose(lt_dlhandle handle)
 208 {
 209         return 0;
 210 }
 211
 212 const char *lt_dlerror(void)
 213 {
 214         return "Unspecified error";
 215 }
 216
 217 #endif  /* WITH_DLOPEN */
 218 #else   /* WITHOUT_LIBLTDL */
 219
 220 /*
 221  *      Solve the issues of libraries linking to other libraries
 222  *      by using a newer libltdl API.
 223  */
 224 #ifndef HAVE_LT_DLADVISE_INIT
 225 #define fr_dlopenext lt_dlopenext
 226 #else
 227 static lt_dlhandle fr_dlopenext(const char *filename)
 228 {
 229         lt_dlhandle handle = 0;
 230         lt_dladvise advise;
 231
 232         if (!lt_dladvise_init (&advise) &&
 233             !lt_dladvise_ext (&advise) &&
 234             !lt_dladvise_global (&advise)) {
 235                 handle = lt_dlopenadvise (filename, advise);
 236         }
 237
 238         lt_dladvise_destroy (&advise);
 239
 240         return handle;
 241 }
 242 #endif  /* HAVE_LT_DLADVISE_INIT */
 243 #endif /* WITHOUT_LIBLTDL */
 244
 245 static int virtual_server_idx(const char *name)
 246 {
 247         uint32_t hash;
 248
 249         if (!name) return 0;
 250
 251         hash = fr_hash_string(name);
 252
 253         return hash & (VIRTUAL_SERVER_HASH_SIZE - 1);
 254 }
 255
 256 static void virtual_server_free(virtual_server_t *server)
 257 {
 258         if (!server) return;
 259
 260         if (server->components) rbtree_free(server->components);
 261         server->components = NULL;
 262
 263         free(server);
 264 }
 265
 266 void virtual_servers_free(time_t when)
 267 {
 268         int i;
 269         virtual_server_t **last;
 270
 271         for (i = 0; i < VIRTUAL_SERVER_HASH_SIZE; i++) {
 272                 virtual_server_t *server, *next;
 273
 274                 last = &virtual_servers[i];
 275                 for (server = virtual_servers[i];
 276                      server != NULL;
 277                      server = next) {
 278                         next = server->next;
 279
 280                         /*
 281                          *      If we delete it, fix the links so that
 282                          *      we don't orphan anything.  Also,
 283                          *      delete it if it's old, AND a newer one
 284                          *      was defined.
 285                          *
 286                          *      Otherwise, the last pointer gets set to
 287                          *      the one we didn't delete.
 288                          */
 289                         if ((when == 0) ||
 290                             ((server->created < when) && server->can_free)) {
 291                                 *last = server->next;
 292                                 virtual_server_free(server);
 293                         } else {
 294                                 last = &(server->next);
 295                         }
 296                 }
 297         }
 298 }
 299
 300 static void indexed_modcallable_free(void *data)
 301 {
 302         indexed_modcallable *c = data;
 303
 304         modcallable_free(&c->modulelist);
 305         free(c);
 306 }
 307
 308 static int indexed_modcallable_cmp(const void *one, const void *two)
 309 {
 310         const indexed_modcallable *a = one;
 311         const indexed_modcallable *b = two;
 312
 313         if (a->comp < b->comp) return -1;
 314         if (a->comp >  b->comp) return +1;
 315
 316         return a->idx - b->idx;
 317 }
 318
 319
 320 /*
 321  *      Compare two module entries
 322  */
 323 static int module_instance_cmp(const void *one, const void *two)
 324 {
 325         const module_instance_t *a = one;
 326         const module_instance_t *b = two;
 327
 328         return strcmp(a->name, b->name);
 329 }
 330
 331
 332 static void module_instance_free_old(CONF_SECTION *cs, module_instance_t *node,
 333                                      time_t when)
 334 {
 335         fr_module_hup_t *mh, **last;
 336
 337         /*
 338          *      Walk the list, freeing up old instances.
 339          */
 340         last = &(node->mh);
 341         while (*last) {
 342                 mh = *last;
 343
 344                 /*
 345                  *      Free only every 60 seconds.
 346                  */
 347                 if ((when - mh->when) < 60) {
 348                         last = &(mh->next);
 349                         continue;
 350                 }
 351
 352                 cf_section_parse_free(cs, mh->insthandle);
 353
 354                 if (node->entry->module->detach) {
 355                         (node->entry->module->detach)(mh->insthandle);
 356                 } else {
 357                         free(mh->insthandle);
 358                 }
 359
 360                 *last = mh->next;
 361                 free(mh);
 362         }
 363 }
 364
 365
 366 /*
 367  *      Free a module instance.
 368  */
 369 static void module_instance_free(void *data)
 370 {
 371         module_instance_t *this = data;
 372
 373         module_instance_free_old(this->cs, this, time(NULL) + 100);
 374
 375         if (this->entry->module->detach) {
 376                 (this->entry->module->detach)(this->insthandle);
 377         }
 378
 379 #ifdef HAVE_PTHREAD_H
 380         if (this->mutex) {
 381                 /*
 382                  *      FIXME
 383                  *      The mutex MIGHT be locked...
 384                  *      we'll check for that later, I guess.
 385                  */
 386                 pthread_mutex_destroy(this->mutex);
 387                 free(this->mutex);
 388         }
 389 #endif
 390         memset(this, 0, sizeof(*this));
 391         free(this);
 392 }
 393
 394
 395 /*
 396  *      Compare two module entries
 397  */
 398 static int module_entry_cmp(const void *one, const void *two)
 399 {
 400         const module_entry_t *a = one;
 401         const module_entry_t *b = two;
 402
 403         return strcmp(a->name, b->name);
 404 }
 405
 406 /*
 407  *      Free a module entry.
 408  */
 409 static void module_entry_free(void *data)
 410 {
 411         module_entry_t *this = data;
 412
 413         lt_dlclose(this->handle);       /* ignore any errors */
 414         memset(this, 0, sizeof(*this));
 415         free(this);
 416 }
 417
 418
 419 /*
 420  *      Remove the module lists.
 421  */
 422 int detach_modules(void)
 423 {
 424         rbtree_free(instance_tree);
 425         rbtree_free(module_tree);
 426
 427         lt_dlexit();
 428
 429         return 0;
 430 }
 431
 432
 433 /*
 434  *      Find a module on disk or in memory, and link to it.
 435  */
 436 static module_entry_t *linkto_module(const char *module_name,
 437                                      CONF_SECTION *cs)
 438 {
 439         module_entry_t myentry;
 440         module_entry_t *node;
 441         lt_dlhandle handle = NULL;
 442         char module_struct[256];
 443         char *p;
 444         const module_t *module;
 445
 446         strlcpy(myentry.name, module_name, sizeof(myentry.name));
 447         node = rbtree_finddata(module_tree, &myentry);
 448         if (node) return node;
 449
 450         /*
 451          *      Link to the module's rlm_FOO{} module structure.
 452          *
 453          *      The module_name variable has the version number
 454          *      embedded in it, and we don't want that here.
 455          */
 456         strcpy(module_struct, module_name);
 457         p = strrchr(module_struct, '-');
 458         if (p) *p = '\0';
 459
 460 #if defined(WITHOUT_LIBLTDL) && defined (WITH_DLOPEN) && defined(RTLD_SELF)
 461         module = lt_dlsym(RTLD_SELF, module_struct);
 462         if (module) goto open_self;
 463 #endif
 464
 465         /*
 466          *      Keep the handle around so we can dlclose() it.
 467          */
 468         handle = fr_dlopenext(module_name);
 469         if (handle == NULL) {
 470                 cf_log_err(cf_sectiontoitem(cs),
 471                            "Failed to link to module '%s': %s\n",
 472                            module_name, lt_dlerror());
 473                 return NULL;
 474         }
 475
 476         DEBUG3("    (Loaded %s, checking if it's valid)", module_name);
 477
 478         /*
 479          *      libltld MAY core here, if the handle it gives us contains
 480          *      garbage data.
 481          */
 482         module = lt_dlsym(handle, module_struct);
 483         if (!module) {
 484                 cf_log_err(cf_sectiontoitem(cs),
 485                            "Failed linking to %s structure: %s\n",
 486                            module_name, lt_dlerror());
 487                 lt_dlclose(handle);
 488                 return NULL;
 489         }
 490
 491 #if defined(WITHOUT_LIBLTDL) && defined (WITH_DLOPEN) && defined(RTLD_SELF)
 492  open_self:
 493 #endif
 494         /*
 495          *      Before doing anything else, check if it's sane.
 496          */
 497         if (module->magic != RLM_MODULE_MAGIC_NUMBER) {
 498                 lt_dlclose(handle);
 499                 cf_log_err(cf_sectiontoitem(cs),
 500                            "Invalid version in module '%s'",
 501                            module_name);
 502                 return NULL;
 503
 504         }
 505
 506         /* make room for the module type */
 507         node = rad_malloc(sizeof(*node));
 508         memset(node, 0, sizeof(*node));
 509         strlcpy(node->name, module_name, sizeof(node->name));
 510         node->module = module;
 511         node->handle = handle;
 512
 513         cf_log_module(cs, "Linked to module %s", module_name);
 514
 515         /*
 516          *      Add the module as "rlm_foo-version" to the configuration
 517          *      section.
 518          */
 519         if (!rbtree_insert(module_tree, node)) {
 520                 radlog(L_ERR, "Failed to cache module %s", module_name);
 521                 lt_dlclose(handle);
 522                 free(node);
 523                 return NULL;
 524         }
 525
 526         return node;
 527 }
 528
 529 /*
 530  *      Find a module instance.
 531  */
 532 module_instance_t *find_module_instance(CONF_SECTION *modules,
 533                                         const char *instname, int do_link)
 534 {
 535         int check_config_safe = FALSE;
 536         CONF_SECTION *cs;
 537         const char *name1;
 538         module_instance_t *node, myNode;
 539         char module_name[256];
 540
 541         if (!modules) return NULL;
 542
 543         /*
 544          *      Module instances are declared in the modules{} block
 545          *      and referenced later by their name, which is the
 546          *      name2 from the config section, or name1 if there was
 547          *      no name2.
 548          */
 549         cs = cf_section_sub_find_name2(modules, NULL, instname);
 550         if (cs == NULL) {
 551                 radlog(L_ERR, "ERROR: Cannot find a configuration entry for module \"%s\".\n", instname);
 552                 return NULL;
 553         }
 554
 555         /*
 556          *      If there's already a module instance, return it.
 557          */
 558         strlcpy(myNode.name, instname, sizeof(myNode.name));
 559         node = rbtree_finddata(instance_tree, &myNode);
 560         if (node) return node;
 561
 562         if (!do_link) return NULL;
 563
 564         name1 = cf_section_name1(cs);
 565
 566         /*
 567          *      Found the configuration entry.
 568          */
 569         node = rad_malloc(sizeof(*node));
 570         memset(node, 0, sizeof(*node));
 571
 572         node->insthandle = NULL;
 573         node->cs = cs;
 574
 575         /*
 576          *      Names in the "modules" section aren't prefixed
 577          *      with "rlm_", so we add it here.
 578          */
 579         snprintf(module_name, sizeof(module_name), "rlm_%s", name1);
 580
 581         node->entry = linkto_module(module_name, cs);
 582         if (!node->entry) {
 583                 free(node);
 584                 /* linkto_module logs any errors */
 585                 return NULL;
 586         }
 587
 588         if (check_config && (node->entry->module->instantiate) &&
 589             (node->entry->module->type & RLM_TYPE_CHECK_CONFIG_SAFE) == 0) {
 590                 const char *value = NULL;
 591                 CONF_PAIR *cp;
 592
 593                 cp = cf_pair_find(cs, "force_check_config");
 594                 if (cp) value = cf_pair_value(cp);
 595
 596                 if (value && (strcmp(value, "yes") == 0)) goto print_inst;
 597
 598                 cf_log_module(cs, "Skipping instantiation of %s", instname);
 599         } else {
 600         print_inst:
 601                 check_config_safe = TRUE;
 602                 cf_log_module(cs, "Instantiating module \"%s\" from file %s",
 603                               instname, cf_section_filename(cs));
 604         }
 605
 606         /*
 607          *      Call the module's instantiation routine.
 608          */
 609         if ((node->entry->module->instantiate) &&
 610             (!check_config || check_config_safe) &&
 611             ((node->entry->module->instantiate)(cs, &node->insthandle) < 0)) {
 612                 cf_log_err(cf_sectiontoitem(cs),
 613                            "Instantiation failed for module \"%s\"",
 614                            instname);
 615                 free(node);
 616                 return NULL;
 617         }
 618
 619         /*
 620          *      We're done.  Fill in the rest of the data structure,
 621          *      and link it to the module instance list.
 622          */
 623         strlcpy(node->name, instname, sizeof(node->name));
 624
 625 #ifdef HAVE_PTHREAD_H
 626         /*
 627          *      If we're threaded, check if the module is thread-safe.
 628          *
 629          *      If it isn't, we create a mutex.
 630          */
 631         if ((node->entry->module->type & RLM_TYPE_THREAD_UNSAFE) != 0) {
 632                 node->mutex = (pthread_mutex_t *) rad_malloc(sizeof(pthread_mutex_t));
 633                 /*
 634                  *      Initialize the mutex.
 635                  */
 636                 pthread_mutex_init(node->mutex, NULL);
 637         } else {
 638                 /*
 639                  *      The module is thread-safe.  Don't give it a mutex.
 640                  */
 641                 node->mutex = NULL;
 642         }
 643
 644 #endif
 645         rbtree_insert(instance_tree, node);
 646
 647         return node;
 648 }
 649
 650 static indexed_modcallable *lookup_by_index(rbtree_t *components,
 651                                             int comp, int idx)
 652 {
 653         indexed_modcallable myc;
 654
 655         myc.comp = comp;
 656         myc.idx = idx;
 657
 658         return rbtree_finddata(components, &myc);
 659 }
 660
 661 /*
 662  *      Create a new sublist.
 663  */
 664 static indexed_modcallable *new_sublist(rbtree_t *components, int comp, int idx)
 665 {
 666         indexed_modcallable *c;
 667
 668         c = lookup_by_index(components, comp, idx);
 669
 670         /* It is an error to try to create a sublist that already
 671          * exists. It would almost certainly be caused by accidental
 672          * duplication in the config file.
 673          *
 674          * index 0 is the exception, because it is used when we want
 675          * to collect _all_ listed modules under a single index by
 676          * default, which is currently the case in all components
 677          * except authenticate. */
 678         if (c) {
 679                 if (idx == 0) {
 680                         return c;
 681                 }
 682                 return NULL;
 683         }
 684
 685         c = rad_malloc(sizeof(*c));
 686         c->modulelist = NULL;
 687         c->comp = comp;
 688         c->idx = idx;
 689
 690         if (!rbtree_insert(components, c)) {
 691                 free(c);
 692                 return NULL;
 693         }
 694
 695         return c;
 696 }
 697
 698 int indexed_modcall(int comp, int idx, REQUEST *request)
 699 {
 700         int rcode;
 701         modcallable *list = NULL;
 702         virtual_server_t *server;
 703
 704         /*
 705          *      Hack to find the correct virtual server.
 706          */
 707         rcode = virtual_server_idx(request->server);
 708         for (server = virtual_servers[rcode];
 709              server != NULL;
 710              server = server->next) {
 711                 if (!request->server && !server->name) break;
 712
 713                 if ((request->server && server->name) &&
 714                     (strcmp(request->server, server->name) == 0)) break;
 715         }
 716
 717         if (!server) {
 718                 RDEBUG("No such virtual server \"%s\"", request->server);
 719                 return RLM_MODULE_FAIL;
 720         }
 721
 722         if (idx == 0) {
 723                 list = server->mc[comp];
 724                 if (!list) RDEBUG2("  WARNING: Empty %s section.  Using default return values.", section_type_value[comp].section);
 725
 726         } else {
 727                 indexed_modcallable *this;
 728
 729                 this = lookup_by_index(server->components, comp, idx);
 730                 if (this) {
 731                         list = this->modulelist;
 732                 } else {
 733                         RDEBUG2("  WARNING: Unknown value specified for %s.  Cannot perform requested action.",
 734                                 section_type_value[comp].typename);
 735                 }
 736         }
 737
 738         if (server->subcs[comp]) {
 739                 if (idx == 0) {
 740                         RDEBUG("# Executing section %s from file %s",
 741                                section_type_value[comp].section,
 742                                cf_section_filename(server->subcs[comp]));
 743                 } else {
 744                         RDEBUG("# Executing group from file %s",
 745                                cf_section_filename(server->subcs[comp]));
 746                 }
 747         }
 748         request->component = section_type_value[comp].section;
 749
 750         rcode = modcall(comp, list, request);
 751
 752         request->module = "";
 753         request->component = "<core>";
 754         return rcode;
 755 }
 756
 757 /*
 758  *      Load a sub-module list, as found inside an Auth-Type foo {}
 759  *      block
 760  */
 761 static int load_subcomponent_section(modcallable *parent, CONF_SECTION *cs,
 762                                      rbtree_t *components, int attr, int comp)
 763 {
 764         indexed_modcallable *subcomp;
 765         modcallable *ml;
 766         DICT_VALUE *dval;
 767         const char *name2 = cf_section_name2(cs);
 768
 769         rad_assert(comp >= RLM_COMPONENT_AUTH);
 770         rad_assert(comp < RLM_COMPONENT_COUNT);
 771
 772         /*
 773          *      Sanity check.
 774          */
 775         if (!name2) {
 776                 cf_log_err(cf_sectiontoitem(cs),
 777                            "No name specified for %s block",
 778                            section_type_value[comp].typename);
 779                 return 1;
 780         }
 781
 782         /*
 783          *      Compile the group.
 784          */
 785         ml = compile_modgroup(parent, comp, cs);
 786         if (!ml) {
 787                 return 0;
 788         }
 789
 790         /*
 791          *      We must assign a numeric index to this subcomponent.
 792          *      It is generated and placed in the dictionary
 793          *      automatically.  If it isn't found, it's a serious
 794          *      error.
 795          */
 796         dval = dict_valbyname(attr, 0, name2);
 797         if (!dval) {
 798                 cf_log_err(cf_sectiontoitem(cs),
 799                            "%s %s Not previously configured",
 800                            section_type_value[comp].typename, name2);
 801                 modcallable_free(&ml);
 802                 return 0;
 803         }
 804
 805         subcomp = new_sublist(components, comp, dval->value);
 806         if (!subcomp) {
 807                 modcallable_free(&ml);
 808                 return 1;
 809         }
 810
 811         subcomp->modulelist = ml;
 812         return 1;               /* OK */
 813 }
 814
 815 static int define_type(const DICT_ATTR *dattr, const char *name)
 816 {
 817         uint32_t value;
 818         DICT_VALUE *dval;
 819
 820         /*
 821          *      If the value already exists, don't
 822          *      create it again.
 823          */
 824         dval = dict_valbyname(dattr->attr, dattr->vendor, name);
 825         if (dval) return 1;
 826
 827         /*
 828          *      Create a new unique value with a
 829          *      meaningless number.  You can't look at
 830          *      it from outside of this code, so it
 831          *      doesn't matter.  The only requirement
 832          *      is that it's unique.
 833          */
 834         do {
 835                 value = fr_rand() & 0x00ffffff;
 836         } while (dict_valbyattr(dattr->attr, dattr->vendor, value));
 837
 838         if (dict_addvalue(name, dattr->name, value) < 0) {
 839                 radlog(L_ERR, "%s", fr_strerror());
 840                 return 0;
 841         }
 842
 843         return 1;
 844 }
 845
 846 static int load_component_section(CONF_SECTION *cs,
 847                                   rbtree_t *components, int comp)
 848 {
 849         modcallable *this;
 850         CONF_ITEM *modref;
 851         int idx;
 852         indexed_modcallable *subcomp;
 853         const char *modname;
 854         const char *visiblename;
 855         const DICT_ATTR *dattr;
 856
 857         /*
 858          *      Find the attribute used to store VALUEs for this section.
 859          */
 860         dattr = dict_attrbyvalue(section_type_value[comp].attr, 0);
 861         if (!dattr) {
 862                 cf_log_err(cf_sectiontoitem(cs),
 863                            "No such attribute %s",
 864                            section_type_value[comp].typename);
 865                 return -1;
 866         }
 867
 868         /*
 869          *      Loop over the entries in the named section, loading
 870          *      the sections this time.
 871          */
 872         for (modref = cf_item_find_next(cs, NULL);
 873              modref != NULL;
 874              modref = cf_item_find_next(cs, modref)) {
 875                 const char *name1;
 876                 CONF_PAIR *cp = NULL;
 877                 CONF_SECTION *scs = NULL;
 878
 879                 if (cf_item_is_section(modref)) {
 880                         scs = cf_itemtosection(modref);
 881
 882                         name1 = cf_section_name1(scs);
 883
 884                         if (strcmp(name1,
 885                                    section_type_value[comp].typename) == 0) {
 886                                 if (!load_subcomponent_section(NULL, scs,
 887                                                                components,
 888                                                                dattr->attr,
 889                                                                comp)) {
 890                                         return -1; /* FIXME: memleak? */
 891                                 }
 892                                 continue;
 893                         }
 894
 895                         cp = NULL;
 896
 897                 } else if (cf_item_is_pair(modref)) {
 898                         cp = cf_itemtopair(modref);
 899
 900                 } else {
 901                         continue; /* ignore it */
 902                 }
 903
 904                 /*
 905                  *      Try to compile one entry.
 906                  */
 907                 this = compile_modsingle(NULL, comp, modref, &modname);
 908                 if (!this) {
 909                         cf_log_err(cf_sectiontoitem(cs),
 910                                    "Errors parsing %s section.\n",
 911                                    cf_section_name1(cs));
 912                         return -1;
 913                 }
 914
 915                 /*
 916                  *      Look for Auth-Type foo {}, which are special
 917                  *      cases of named sections, and allowable ONLY
 918                  *      at the top-level.
 919                  *
 920                  *      i.e. They're not allowed in a "group" or "redundant"
 921                  *      subsection.
 922                  */
 923                 if (comp == RLM_COMPONENT_AUTH) {
 924                         DICT_VALUE *dval;
 925                         const char *modrefname = NULL;
 926                         if (cp) {
 927                                 modrefname = cf_pair_attr(cp);
 928                         } else {
 929                                 modrefname = cf_section_name2(scs);
 930                                 if (!modrefname) {
 931                                         modcallable_free(&this);
 932                                         cf_log_err(cf_sectiontoitem(cs),
 933                                                    "Errors parsing %s sub-section.\n",
 934                                                    cf_section_name1(scs));
 935                                         return -1;
 936                                 }
 937                         }
 938
 939                         dval = dict_valbyname(PW_AUTH_TYPE, 0, modrefname);
 940                         if (!dval) {
 941                                 /*
 942                                  *      It's a section, but nothing we
 943                                  *      recognize.  Die!
 944                                  */
 945                                 modcallable_free(&this);
 946                                 cf_log_err(cf_sectiontoitem(cs),
 947                                            "Unknown Auth-Type \"%s\" in %s sub-section.",
 948                                            modrefname, section_type_value[comp].section);
 949                                 return -1;
 950                         }
 951                         idx = dval->value;
 952                 } else {
 953                         /* See the comment in new_sublist() for explanation
 954                          * of the special index 0 */
 955                         idx = 0;
 956                 }
 957
 958                 subcomp = new_sublist(components, comp, idx);
 959                 if (subcomp == NULL) {
 960                         modcallable_free(&this);
 961                         continue;
 962                 }
 963
 964                 /* If subcomp->modulelist is NULL, add_to_modcallable will
 965                  * create it */
 966                 visiblename = cf_section_name2(cs);
 967                 if (visiblename == NULL)
 968                         visiblename = cf_section_name1(cs);
 969                 add_to_modcallable(&subcomp->modulelist, this,
 970                                    comp, visiblename);
 971         }
 972
 973         return 0;
 974 }
 975
 976 static int load_byserver(CONF_SECTION *cs)
 977 {
 978         int comp, flag;
 979         const char *name = cf_section_name2(cs);
 980         rbtree_t *components;
 981         virtual_server_t *server = NULL;
 982         indexed_modcallable *c;
 983
 984         if (name) {
 985                 cf_log_info(cs, "server %s { # from file %s",
 986                             name, cf_section_filename(cs));
 987         } else {
 988                 cf_log_info(cs, "server { # from file %s",
 989                             cf_section_filename(cs));
 990         }
 991
 992         cf_log_info(cs, " modules {");
 993
 994         components = rbtree_create(indexed_modcallable_cmp,
 995                                    indexed_modcallable_free, 0);
 996         if (!components) {
 997                 radlog(L_ERR, "Failed to initialize components\n");
 998                 goto error;
 999         }
1000
1001         server = rad_malloc(sizeof(*server));
1002         memset(server, 0, sizeof(*server));
1003
1004         server->name = name;
1005         server->created = time(NULL);
1006         server->cs = cs;
1007         server->components = components;
1008
1009         /*
1010          *      Define types first.
1011          */
1012         for (comp = 0; comp < RLM_COMPONENT_COUNT; ++comp) {
1013                 CONF_SECTION *subcs;
1014                 CONF_ITEM *modref;
1015                 DICT_ATTR *dattr;
1016
1017                 subcs = cf_section_sub_find(cs,
1018                                             section_type_value[comp].section);
1019                 if (!subcs) continue;
1020
1021                 if (cf_item_find_next(subcs, NULL) == NULL) continue;
1022
1023                 /*
1024                  *      Find the attribute used to store VALUEs for this section.
1025                  */
1026                 dattr = dict_attrbyvalue(section_type_value[comp].attr, 0);
1027                 if (!dattr) {
1028                         cf_log_err(cf_sectiontoitem(subcs),
1029                                    "No such attribute %s",
1030                                    section_type_value[comp].typename);
1031                 error:
1032                         if (debug_flag == 0) {
1033                                 radlog(L_ERR, "Failed to load virtual server %s",
1034                                        (name != NULL) ? name : "<default>");
1035                         }
1036                         virtual_server_free(server);
1037                         return -1;
1038                 }
1039
1040                 /*
1041                  *      Define dynamic types, so that others can reference
1042                  *      them.
1043                  */
1044                 for (modref = cf_item_find_next(subcs, NULL);
1045                      modref != NULL;
1046                      modref = cf_item_find_next(subcs, modref)) {
1047                         const char *name1;
1048                         CONF_SECTION *subsubcs;
1049
1050                         /*
1051                          *      Create types for simple references
1052                          *      only when parsing the authenticate
1053                          *      section.
1054                          */
1055                         if ((section_type_value[comp].attr == PW_AUTH_TYPE) &&
1056                             cf_item_is_pair(modref)) {
1057                                 CONF_PAIR *cp = cf_itemtopair(modref);
1058                                 if (!define_type(dattr, cf_pair_attr(cp))) {
1059                                         goto error;
1060                                 }
1061
1062                                 continue;
1063                         }
1064
1065                         if (!cf_item_is_section(modref)) continue;
1066
1067                         subsubcs = cf_itemtosection(modref);
1068                         name1 = cf_section_name1(subsubcs);
1069
1070                         if (strcmp(name1, section_type_value[comp].typename) == 0) {
1071                                 if (!define_type(dattr,
1072                                                  cf_section_name2(subsubcs))) {
1073                                         goto error;
1074                                 }
1075                         }
1076                 }
1077         } /* loop over components */
1078
1079         /*
1080          *      Loop over all of the known components, finding their
1081          *      configuration section, and loading it.
1082          */
1083         flag = 0;
1084         for (comp = 0; comp < RLM_COMPONENT_COUNT; ++comp) {
1085                 CONF_SECTION *subcs;
1086
1087                 subcs = cf_section_sub_find(cs,
1088                                             section_type_value[comp].section);
1089                 if (!subcs) continue;
1090
1091                 if (cf_item_find_next(subcs, NULL) == NULL) continue;
1092
1093                 cf_log_module(cs, "Checking %s {...} for more modules to load",
1094                        section_type_value[comp].section);
1095
1096                 /*
1097                  *      Skip pre/post-proxy sections if we're not
1098                  *      proxying.
1099                  */
1100                 if (
1101 #ifdef WITH_PROXY
1102                     !mainconfig.proxy_requests &&
1103 #endif
1104                     ((comp == RLM_COMPONENT_PRE_PROXY) ||
1105                      (comp == RLM_COMPONENT_POST_PROXY))) {
1106                         continue;
1107                 }
1108
1109                 if (load_component_section(subcs, components, comp) < 0) {
1110                         goto error;
1111                 }
1112
1113                 /*
1114                  *      Cache a default, if it exists.  Some people
1115                  *      put empty sections for some reason...
1116                  */
1117                 c = lookup_by_index(components, comp, 0);
1118                 if (c) server->mc[comp] = c->modulelist;
1119
1120                 server->subcs[comp] = subcs;
1121
1122                 flag = 1;
1123         } /* loop over components */
1124
1125         /*
1126          *      We haven't loaded any of the normal sections.  Maybe we're
1127          *      supposed to load the vmps section.
1128          *
1129          *      This is a bit of a hack...
1130          */
1131         if (!flag) {
1132                 CONF_SECTION *subcs;
1133
1134                 subcs = cf_section_sub_find(cs, "vmps");
1135                 if (subcs) {
1136                         cf_log_module(cs, "Checking vmps {...} for more modules to load");
1137                         if (load_component_section(subcs, components,
1138                                                    RLM_COMPONENT_POST_AUTH) < 0) {
1139                                 goto error;
1140                         }
1141                         c = lookup_by_index(components,
1142                                             RLM_COMPONENT_POST_AUTH, 0);
1143                         if (c) server->mc[RLM_COMPONENT_POST_AUTH] = c->modulelist;
1144                         flag = 1;
1145                 }
1146
1147 #ifdef WITH_DHCP
1148                 if (!flag) {
1149                         const DICT_ATTR *dattr;
1150
1151                         dattr = dict_attrbyname("DHCP-Message-Type");
1152
1153                         /*
1154                          *      Handle each DHCP Message type separately.
1155                          */
1156                         if (dattr) for (subcs = cf_subsection_find_next(cs, NULL, "dhcp");
1157                                         subcs != NULL;
1158                                         subcs = cf_subsection_find_next(cs, subcs,
1159                                                                         "dhcp")) {
1160                                 const char *name2 = cf_section_name2(subcs);
1161
1162                                 DEBUG2(" Module: Checking dhcp %s {...} for more modules to load", name2);
1163                                 if (!load_subcomponent_section(NULL, subcs,
1164                                                                components,
1165                                                                dattr->attr,
1166                                                                RLM_COMPONENT_POST_AUTH)) {
1167                                         goto error; /* FIXME: memleak? */
1168                                 }
1169                                 c = lookup_by_index(components,
1170                                                     RLM_COMPONENT_POST_AUTH, 0);
1171                                 if (c) server->mc[RLM_COMPONENT_POST_AUTH] = c->modulelist;
1172                                 flag = 1;
1173                         }
1174                 }
1175 #endif
1176         }
1177
1178         cf_log_info(cs, " } # modules");
1179         cf_log_info(cs, "} # server");
1180
1181         if (!flag && name) {
1182                 DEBUG("WARNING: Server %s is empty, and will do nothing!",
1183                       name);
1184         }
1185
1186         if (debug_flag == 0) {
1187                 radlog(L_INFO, "Loaded virtual server %s",
1188                        (name != NULL) ? name : "<default>");
1189         }
1190
1191         /*
1192          *      Now that it is OK, insert it into the list.
1193          *
1194          *      This is thread-safe...
1195          */
1196         comp = virtual_server_idx(name);
1197         server->next = virtual_servers[comp];
1198         virtual_servers[comp] = server;
1199
1200         /*
1201          *      Mark OLDER ones of the same name as being unused.
1202          */
1203         server = server->next;
1204         while (server) {
1205                 if ((!name && !server->name) ||
1206                     (name && server->name &&
1207                      (strcmp(server->name, name) == 0))) {
1208                         server->can_free = TRUE;
1209                         break;
1210                 }
1211                 server = server->next;
1212         }
1213
1214         return 0;
1215 }
1216
1217
1218 /*
1219  *      Load all of the virtual servers.
1220  */
1221 int virtual_servers_load(CONF_SECTION *config)
1222 {
1223         int null_server = FALSE;
1224         CONF_SECTION *cs;
1225         static int first_time = TRUE;
1226
1227         DEBUG2("%s: #### Loading Virtual Servers ####", mainconfig.name);
1228
1229         /*
1230          *      Load all of the virtual servers.
1231          */
1232         for (cs = cf_subsection_find_next(config, NULL, "server");
1233              cs != NULL;
1234              cs = cf_subsection_find_next(config, cs, "server")) {
1235                 if (!cf_section_name2(cs)) null_server = TRUE;
1236
1237                 if (load_byserver(cs) < 0) {
1238                         /*
1239                          *      Once we successfully staryed once,
1240                          *      continue loading the OTHER servers,
1241                          *      even if one fails.
1242                          */
1243                         if (!first_time) continue;
1244                         return -1;
1245                 }
1246         }
1247
1248         /*
1249          *      No empty server defined.  Try to load an old-style
1250          *      one for backwards compatibility.
1251          */
1252         if (!null_server) {
1253                 if (load_byserver(config) < 0) {
1254                         return -1;
1255                 }
1256         }
1257
1258         /*
1259          *      If we succeed the first time around, remember that.
1260          */
1261         first_time = FALSE;
1262
1263         return 0;
1264 }
1265
1266 int module_hup_module(CONF_SECTION *cs, module_instance_t *node, time_t when)
1267 {
1268         void *insthandle = NULL;
1269         fr_module_hup_t *mh;
1270
1271         if (!node ||
1272             !node->entry->module->instantiate ||
1273             ((node->entry->module->type & RLM_TYPE_HUP_SAFE) == 0)) {
1274                 return 1;
1275         }
1276
1277         cf_log_module(cs, "Trying to reload module \"%s\"", node->name);
1278
1279         if ((node->entry->module->instantiate)(cs, &insthandle) < 0) {
1280                 cf_log_err(cf_sectiontoitem(cs),
1281                            "HUP failed for module \"%s\".  Using old configuration.",
1282                            node->name);
1283                 return 0;
1284         }
1285
1286         radlog(L_INFO, " Module: Reloaded module \"%s\"", node->name);
1287
1288         module_instance_free_old(cs, node, when);
1289
1290         /*
1291          *      Save the old instance handle for later deletion.
1292          */
1293         mh = rad_malloc(sizeof(*mh));
1294         mh->mi = node;
1295         mh->when = when;
1296         mh->insthandle = node->insthandle;
1297         mh->next = node->mh;
1298         node->mh = mh;
1299
1300         node->insthandle = insthandle;
1301
1302         /*
1303          *      FIXME: Set a timeout to come back in 60s, so that
1304          *      we can pro-actively clean up the old instances.
1305          */
1306
1307         return 1;
1308 }
1309
1310
1311 int module_hup(CONF_SECTION *modules)
1312 {
1313         time_t when;
1314         CONF_ITEM *ci;
1315         CONF_SECTION *cs;
1316         module_instance_t *node;
1317
1318         if (!modules) return 0;
1319
1320         when = time(NULL);
1321
1322         /*
1323          *      Loop over the modules
1324          */
1325         for (ci=cf_item_find_next(modules, NULL);
1326              ci != NULL;
1327              ci=cf_item_find_next(modules, ci)) {
1328                 const char *instname;
1329                 module_instance_t myNode;
1330
1331                 /*
1332                  *      If it's not a section, ignore it.
1333                  */
1334                 if (!cf_item_is_section(ci)) continue;
1335
1336                 cs = cf_itemtosection(ci);
1337                 instname = cf_section_name2(cs);
1338                 if (!instname) instname = cf_section_name1(cs);
1339
1340                 strlcpy(myNode.name, instname, sizeof(myNode.name));
1341                 node = rbtree_finddata(instance_tree, &myNode);
1342
1343                 module_hup_module(cs, node, when);
1344         }
1345
1346         return 1;
1347 }
1348
1349
1350 /*
1351  *      Parse the module config sections, and load
1352  *      and call each module's init() function.
1353  *
1354  *      Libtool makes your life a LOT easier, especially with libltdl.
1355  *      see: http://www.gnu.org/software/libtool/
1356  */
1357 int setup_modules(int reload, CONF_SECTION *config)
1358 {
1359         CONF_SECTION    *cs, *modules;
1360         rad_listen_t    *listener;
1361
1362         if (reload) return 0;
1363
1364         /*
1365          *      If necessary, initialize libltdl.
1366          */
1367         if (!reload) {
1368                 /*
1369                  *      This line works around a completely
1370                  *
1371                  *              RIDICULOUS INSANE IDIOTIC
1372                  *
1373                  *      bug in libltdl on certain systems.  The "set
1374                  *      preloaded symbols" macro below ends up
1375                  *      referencing this name, but it isn't defined
1376                  *      anywhere in the libltdl source.  As a result,
1377                  *      any program STUPID enough to rely on libltdl
1378                  *      fails to link, because the symbol isn't
1379                  *      defined anywhere.
1380                  *
1381                  *      It's like libtool and libltdl are some kind
1382                  *      of sick joke.
1383                  */
1384 #ifdef IE_LIBTOOL_DIE
1385 #define lt__PROGRAM__LTX_preloaded_symbols lt_libltdl_LTX_preloaded_symbols
1386 #endif
1387
1388                 /*
1389                  *      Set the default list of preloaded symbols.
1390                  *      This is used to initialize libltdl's list of
1391                  *      preloaded modules.
1392                  *
1393                  *      i.e. Static modules.
1394                  */
1395                 LTDL_SET_PRELOADED_SYMBOLS();
1396
1397                 if (lt_dlinit() != 0) {
1398                         radlog(L_ERR, "Failed to initialize libraries: %s\n",
1399                                         lt_dlerror());
1400                         return -1;
1401                 }
1402
1403                 /*
1404                  *      Set the search path to ONLY our library directory.
1405                  *      This prevents the modules from being found from
1406                  *      any location on the disk.
1407                  */
1408                 lt_dlsetsearchpath(radlib_dir);
1409
1410                 /*
1411                  *      Set up the internal module struct.
1412                  */
1413                 module_tree = rbtree_create(module_entry_cmp,
1414                                             module_entry_free, 0);
1415                 if (!module_tree) {
1416                         radlog(L_ERR, "Failed to initialize modules\n");
1417                         return -1;
1418                 }
1419
1420                 instance_tree = rbtree_create(module_instance_cmp,
1421                                               module_instance_free, 0);
1422                 if (!instance_tree) {
1423                         radlog(L_ERR, "Failed to initialize modules\n");
1424                         return -1;
1425                 }
1426         }
1427
1428         memset(virtual_servers, 0, sizeof(virtual_servers));
1429
1430         /*
1431          *      Remember where the modules were stored.
1432          */
1433         modules = cf_section_sub_find(config, "modules");
1434         if (!modules) {
1435                 radlog(L_ERR, "Cannot find a \"modules\" section in the configuration file!");
1436                 return -1;
1437         }
1438
1439         DEBUG2("%s: #### Instantiating modules ####", mainconfig.name);
1440
1441         /*
1442          *  Look for the 'instantiate' section, which tells us
1443          *  the instantiation order of the modules, and also allows
1444          *  us to load modules with no authorize/authenticate/etc.
1445          *  sections.
1446          */
1447         cs = cf_section_sub_find(config, "instantiate");
1448         if (cs != NULL) {
1449                 CONF_ITEM *ci;
1450                 CONF_PAIR *cp;
1451                 module_instance_t *module;
1452                 const char *name;
1453
1454                 cf_log_info(cs, " instantiate {");
1455
1456                 /*
1457                  *  Loop over the items in the 'instantiate' section.
1458                  */
1459                 for (ci=cf_item_find_next(cs, NULL);
1460                      ci != NULL;
1461                      ci=cf_item_find_next(cs, ci)) {
1462
1463                         /*
1464                          *      Skip sections and "other" stuff.
1465                          *      Sections will be handled later, if
1466                          *      they're referenced at all...
1467                          */
1468                         if (!cf_item_is_pair(ci)) {
1469                                 continue;
1470                         }
1471
1472                         cp = cf_itemtopair(ci);
1473                         name = cf_pair_attr(cp);
1474                         module = find_module_instance(modules, name, 1);
1475                         if (!module) {
1476                                 return -1;
1477                         }
1478                 } /* loop over items in the subsection */
1479
1480                 cf_log_info(cs, " }");
1481         } /* if there's an 'instantiate' section. */
1482
1483         /*
1484          *      Loop over the listeners, figuring out which sections
1485          *      to load.
1486          */
1487         for (listener = mainconfig.listen;
1488              listener != NULL;
1489              listener = listener->next) {
1490                 char buffer[256];
1491
1492 #ifdef WITH_PROXY
1493                 if (listener->type == RAD_LISTEN_PROXY) continue;
1494 #endif
1495
1496                 cs = cf_section_sub_find_name2(config,
1497                                                "server", listener->server);
1498                 if (!cs && (listener->server != NULL)) {
1499                         listener->print(listener, buffer, sizeof(buffer));
1500
1501                         radlog(L_ERR, "No server has been defined for %s", buffer);
1502                         return -1;
1503                 }
1504         }
1505
1506         if (virtual_servers_load(config) < 0) return -1;
1507
1508         return 0;
1509 }
1510
1511 /*
1512  *      Call all authorization modules until one returns
1513  *      somethings else than RLM_MODULE_OK
1514  */
1515 int module_authorize(int autz_type, REQUEST *request)
1516 {
1517         return indexed_modcall(RLM_COMPONENT_AUTZ, autz_type, request);
1518 }
1519
1520 /*
1521  *      Authenticate a user/password with various methods.
1522  */
1523 int module_authenticate(int auth_type, REQUEST *request)
1524 {
1525         return indexed_modcall(RLM_COMPONENT_AUTH, auth_type, request);
1526 }
1527
1528 #ifdef WITH_ACCOUNTING
1529 /*
1530  *      Do pre-accounting for ALL configured sessions
1531  */
1532 int module_preacct(REQUEST *request)
1533 {
1534         return indexed_modcall(RLM_COMPONENT_PREACCT, 0, request);
1535 }
1536
1537 /*
1538  *      Do accounting for ALL configured sessions
1539  */
1540 int module_accounting(int acct_type, REQUEST *request)
1541 {
1542         return indexed_modcall(RLM_COMPONENT_ACCT, acct_type, request);
1543 }
1544 #endif
1545
1546 #ifdef WITH_SESSION_MGMT
1547 /*
1548  *      See if a user is already logged in.
1549  *
1550  *      Returns: 0 == OK, 1 == double logins, 2 == multilink attempt
1551  */
1552 int module_checksimul(int sess_type, REQUEST *request, int maxsimul)
1553 {
1554         int rcode;
1555
1556         if(!request->username)
1557                 return 0;
1558
1559         request->simul_count = 0;
1560         request->simul_max = maxsimul;
1561         request->simul_mpp = 1;
1562
1563         rcode = indexed_modcall(RLM_COMPONENT_SESS, sess_type, request);
1564
1565         if (rcode != RLM_MODULE_OK) {
1566                 /* FIXME: Good spot for a *rate-limited* warning to the log */
1567                 return 0;
1568         }
1569
1570         return (request->simul_count < maxsimul) ? 0 : request->simul_mpp;
1571 }
1572 #endif
1573
1574 #ifdef WITH_PROXY
1575 /*
1576  *      Do pre-proxying for ALL configured sessions
1577  */
1578 int module_pre_proxy(int type, REQUEST *request)
1579 {
1580         return indexed_modcall(RLM_COMPONENT_PRE_PROXY, type, request);
1581 }
1582
1583 /*
1584  *      Do post-proxying for ALL configured sessions
1585  */
1586 int module_post_proxy(int type, REQUEST *request)
1587 {
1588         return indexed_modcall(RLM_COMPONENT_POST_PROXY, type, request);
1589 }
1590 #endif
1591
1592 /*
1593  *      Do post-authentication for ALL configured sessions
1594  */
1595 int module_post_auth(int postauth_type, REQUEST *request)
1596 {
1597         return indexed_modcall(RLM_COMPONENT_POST_AUTH, postauth_type, request);
1598 }
1599
1600 #ifdef WITH_COA
1601 int module_recv_coa(int recv_coa_type, REQUEST *request)
1602 {
1603         return indexed_modcall(RLM_COMPONENT_RECV_COA, recv_coa_type, request);
1604 }
1605
1606 int module_send_coa(int send_coa_type, REQUEST *request)
1607 {
1608         return indexed_modcall(RLM_COMPONENT_SEND_COA, send_coa_type, request);
1609 }
1610 #endif