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  *      Ordered by component
  71  */
  72 const section_type_value_t section_type_value[RLM_COMPONENT_COUNT] = {
  73         { "authenticate", "Auth-Type",       PW_AUTH_TYPE },
  74         { "authorize",    "Autz-Type",       PW_AUTZ_TYPE },
  75         { "preacct",      "Pre-Acct-Type",   PW_PRE_ACCT_TYPE },
  76         { "accounting",   "Acct-Type",       PW_ACCT_TYPE },
  77         { "session",      "Session-Type",    PW_SESSION_TYPE },
  78         { "pre-proxy",    "Pre-Proxy-Type",  PW_PRE_PROXY_TYPE },
  79         { "post-proxy",   "Post-Proxy-Type", PW_POST_PROXY_TYPE },
  80         { "post-auth",    "Post-Auth-Type",  PW_POST_AUTH_TYPE }
  81 #ifdef WITH_COA
  82         ,
  83         { "recv-coa",     "Recv-CoA-Type",   PW_RECV_COA_TYPE },
  84         { "send-coa",     "Send-CoA-Type",   PW_SEND_COA_TYPE }
  85 #endif
  86 };
  87
  88
  89 #ifndef WITH_LIBLTDL
  90 #ifdef HAVE_DLFCN_H
  91 #include <dlfcn.h>
  92
  93 #ifndef RTLD_NOW
  94 #define RTLD_NOW (0)
  95 #endif
  96 #ifndef RTLD_LOCAL
  97 #define RTLD_LOCAL (0)
  98 #endif
  99
 100 #define fr_dlopenext lt_dlopenext
 101 #ifndef LT_SHREXT
 102 #ifdef __APPLE__
 103 #define LT_SHREXT ".dylib"
 104 #define LD_LIBRARY_PATH "DYLD_FALLBACK_LIBRARY_PATH"
 105 #elif defined (WIN32)
 106 #define LT_SHREXT ".dll"
 107 #else
 108 #define LT_SHREXT ".so"
 109 #define LD_LIBRARY_PATH "LD_LIBRARY_PATH"
 110 #endif
 111 #endif
 112
 113 int lt_dlinit(void)
 114 {
 115         char *p;
 116         const char *val;
 117         char buffer[1024];
 118
 119         /*
 120          *      This doesn't really do anything...
 121          */
 122         p = getenv(LD_LIBRARY_PATH);
 123         if (p) {
 124                 snprintf(buffer, sizeof(buffer), "%s:%s", p, radlib_dir);
 125                 val = buffer;
 126         } else {
 127                 val = radlib_dir;
 128         }
 129
 130         return setenv(LD_LIBRARY_PATH, val, 1);
 131 }
 132
 133 lt_dlhandle lt_dlopenext(const char *name)
 134 {
 135         int flags = RTLD_NOW;
 136         void *handle;
 137         char buffer[2048];
 138
 139 #ifdef RTLD_GLOBAL
 140         if (strcmp(name, "rlm_perl") == 0) {
 141                 flags |= RTLD_GLOBAL;
 142         } else
 143 #endif
 144                 flags |= RTLD_LOCAL;
 145
 146         /*
 147          *      Prefer loading our libraries by absolute path.
 148          */
 149         snprintf(buffer, sizeof(buffer), "%s/%s%s", radlib_dir, name, LT_SHREXT);
 150         handle = dlopen(buffer, flags);
 151         if (handle) return handle;
 152
 153         strlcpy(buffer, name, sizeof(buffer));
 154
 155         /*
 156          *      FIXME: Make this configurable...
 157          */
 158         strlcat(buffer, LT_SHREXT, sizeof(buffer));
 159
 160         return dlopen(buffer, flags);
 161 }
 162
 163 void *lt_dlsym(lt_dlhandle handle, UNUSED const char *symbol)
 164 {
 165         return dlsym(handle, symbol);
 166 }
 167
 168 int lt_dlclose(lt_dlhandle handle)
 169 {
 170         if (!handle) return 0;
 171
 172         return dlclose(handle);
 173 }
 174
 175 const char *lt_dlerror(void)
 176 {
 177         return dlerror();
 178 }
 179
 180
 181 #else  /* without dlopen */
 182 typedef struct lt_dlmodule_t {
 183   const char    *name;
 184   void          *ref;
 185 } lt_dlmodule_t;
 186
 187 typedef struct eap_type_t EAP_TYPE;
 188 typedef struct rlm_sql_module_t rlm_sql_module_t;
 189
 190 /*
 191  *      FIXME: Write hackery to auto-generate this data.
 192  *      We only need to do this on systems that don't have dlopen.
 193  */
 194 extern module_t rlm_pap;
 195 extern module_t rlm_chap;
 196 extern module_t rlm_eap;
 197 extern module_t rlm_sql;
 198 /* and so on ... */
 199
 200 extern EAP_TYPE rlm_eap_md5;
 201 extern rlm_sql_module_t rlm_sql_mysql;
 202 /* and so on ... */
 203
 204 static const lt_dlmodule_t lt_dlmodules[] = {
 205         { "rlm_pap", &rlm_pap },
 206         { "rlm_chap", &rlm_chap },
 207         { "rlm_eap", &rlm_eap },
 208         /* and so on ... */
 209
 210         { "rlm_eap_md5", &rlm_eap_md5 },
 211         /* and so on ... */
 212
 213         { "rlm_sql_mysql", &rlm_sql_mysql },
 214         /* and so on ... */
 215
 216         { NULL, NULL }
 217 };
 218
 219 #define fr_dlopenext lt_dlopenext
 220 lt_dlhandle lt_dlopenext(const char *name)
 221 {
 222         int i;
 223
 224         for (i = 0; lt_dlmodules[i].name != NULL; i++) {
 225                 if (strcmp(name, lt_dlmodules[i].name) == 0) {
 226                         return lt_dlmodules[i].ref;
 227                 }
 228         }
 229
 230         return NULL;
 231 }
 232
 233 void *lt_dlsym(lt_dlhandle handle, UNUSED const char *symbol)
 234 {
 235         return handle;
 236 }
 237
 238 int lt_dlclose(lt_dlhandle handle)
 239 {
 240         return 0;
 241 }
 242
 243 const char *lt_dlerror(void)
 244 {
 245         return "Unspecified error";
 246 }
 247
 248 #endif  /* HAVE_DLFCN_H */
 249 #else   /* WIT_LIBLTDL */
 250
 251 /*
 252  *      Solve the issues of libraries linking to other libraries
 253  *      by using a newer libltdl API.
 254  */
 255 #ifndef HAVE_LT_DLADVISE_INIT
 256 #define fr_dlopenext lt_dlopenext
 257 #else
 258 static lt_dlhandle fr_dlopenext(const char *filename)
 259 {
 260         lt_dlhandle handle = 0;
 261         lt_dladvise advise;
 262
 263         if (!lt_dladvise_init (&advise) &&
 264             !lt_dladvise_ext (&advise) &&
 265             !lt_dladvise_global (&advise)) {
 266                 handle = lt_dlopenadvise (filename, advise);
 267         }
 268
 269         lt_dladvise_destroy (&advise);
 270
 271         return handle;
 272 }
 273 #endif  /* HAVE_LT_DLADVISE_INIT */
 274 #endif /* WITH_LIBLTDL */
 275
 276 static int virtual_server_idx(const char *name)
 277 {
 278         uint32_t hash;
 279
 280         if (!name) return 0;
 281
 282         hash = fr_hash_string(name);
 283
 284         return hash & (VIRTUAL_SERVER_HASH_SIZE - 1);
 285 }
 286
 287 static virtual_server_t *virtual_server_find(const char *name)
 288 {
 289         rlm_rcode_t rcode;
 290         virtual_server_t *server;
 291
 292         rcode = virtual_server_idx(name);
 293         for (server = virtual_servers[rcode];
 294              server != NULL;
 295              server = server->next) {
 296                 if (!name && !server->name) break;
 297
 298                 if ((name && server->name) &&
 299                     (strcmp(name, server->name) == 0)) break;
 300         }
 301
 302         return server;
 303 }
 304
 305 static void virtual_server_free(virtual_server_t *server)
 306 {
 307         if (!server) return;
 308
 309         if (server->components) rbtree_free(server->components);
 310         server->components = NULL;
 311
 312         free(server);
 313 }
 314
 315 void virtual_servers_free(time_t when)
 316 {
 317         int i;
 318         virtual_server_t **last;
 319
 320         for (i = 0; i < VIRTUAL_SERVER_HASH_SIZE; i++) {
 321                 virtual_server_t *server, *next;
 322
 323                 last = &virtual_servers[i];
 324                 for (server = virtual_servers[i];
 325                      server != NULL;
 326                      server = next) {
 327                         next = server->next;
 328
 329                         /*
 330                          *      If we delete it, fix the links so that
 331                          *      we don't orphan anything.  Also,
 332                          *      delete it if it's old, AND a newer one
 333                          *      was defined.
 334                          *
 335                          *      Otherwise, the last pointer gets set to
 336                          *      the one we didn't delete.
 337                          */
 338                         if ((when == 0) ||
 339                             ((server->created < when) && server->can_free)) {
 340                                 *last = server->next;
 341                                 virtual_server_free(server);
 342                         } else {
 343                                 last = &(server->next);
 344                         }
 345                 }
 346         }
 347 }
 348
 349 static void indexed_modcallable_free(void *data)
 350 {
 351         indexed_modcallable *c = data;
 352
 353         modcallable_free(&c->modulelist);
 354         free(c);
 355 }
 356
 357 static int indexed_modcallable_cmp(const void *one, const void *two)
 358 {
 359         const indexed_modcallable *a = one;
 360         const indexed_modcallable *b = two;
 361
 362         if (a->comp < b->comp) return -1;
 363         if (a->comp >  b->comp) return +1;
 364
 365         return a->idx - b->idx;
 366 }
 367
 368
 369 /*
 370  *      Compare two module entries
 371  */
 372 static int module_instance_cmp(const void *one, const void *two)
 373 {
 374         const module_instance_t *a = one;
 375         const module_instance_t *b = two;
 376
 377         return strcmp(a->name, b->name);
 378 }
 379
 380
 381 static void module_instance_free_old(UNUSED CONF_SECTION *cs, module_instance_t *node,
 382                                      time_t when)
 383 {
 384         fr_module_hup_t *mh, **last;
 385
 386         /*
 387          *      Walk the list, freeing up old instances.
 388          */
 389         last = &(node->mh);
 390         while (*last) {
 391                 mh = *last;
 392
 393                 /*
 394                  *      Free only every 60 seconds.
 395                  */
 396                 if ((when - mh->when) < 60) {
 397                         last = &(mh->next);
 398                         continue;
 399                 }
 400
 401                 cf_section_parse_free(cs, mh->insthandle);
 402
 403                 if (node->entry->module->detach) {
 404                         if ((node->entry->module->detach)(mh->insthandle) < 0) {
 405                                 DEBUGW("Failed detaching module %s cleanly.  Doing forcible shutdown", node->name);
 406
 407                         }
 408                 } else {
 409                         free(mh->insthandle);
 410                 }
 411
 412                 *last = mh->next;
 413                 free(mh);
 414         }
 415 }
 416
 417
 418 /*
 419  *      Free a module instance.
 420  */
 421 static void module_instance_free(void *data)
 422 {
 423         module_instance_t *this = data;
 424
 425         module_instance_free_old(this->cs, this, time(NULL) + 100);
 426
 427         cf_section_parse_free(this->cs, this->insthandle);
 428
 429         if (this->entry->module->detach) {
 430                 (this->entry->module->detach)(this->insthandle);
 431         }
 432
 433 #ifdef HAVE_PTHREAD_H
 434         if (this->mutex) {
 435                 /*
 436                  *      FIXME
 437                  *      The mutex MIGHT be locked...
 438                  *      we'll check for that later, I guess.
 439                  */
 440                 pthread_mutex_destroy(this->mutex);
 441                 free(this->mutex);
 442         }
 443 #endif
 444         memset(this, 0, sizeof(*this));
 445         free(this);
 446 }
 447
 448
 449 /*
 450  *      Compare two module entries
 451  */
 452 static int module_entry_cmp(const void *one, const void *two)
 453 {
 454         const module_entry_t *a = one;
 455         const module_entry_t *b = two;
 456
 457         return strcmp(a->name, b->name);
 458 }
 459
 460 /*
 461  *      Free a module entry.
 462  */
 463 static void module_entry_free(void *data)
 464 {
 465         module_entry_t *this = data;
 466
 467         lt_dlclose(this->handle);       /* ignore any errors */
 468         memset(this, 0, sizeof(*this));
 469         free(this);
 470 }
 471
 472
 473 /*
 474  *      Remove the module lists.
 475  */
 476 int detach_modules(void)
 477 {
 478         rbtree_free(instance_tree);
 479         rbtree_free(module_tree);
 480
 481         lt_dlexit();
 482
 483         return 0;
 484 }
 485
 486
 487 /*
 488  *      Find a module on disk or in memory, and link to it.
 489  */
 490 static module_entry_t *linkto_module(const char *module_name,
 491                                      CONF_SECTION *cs)
 492 {
 493         module_entry_t myentry;
 494         module_entry_t *node;
 495         lt_dlhandle handle = NULL;
 496         char module_struct[256];
 497         char *p;
 498         const module_t *module;
 499
 500         strlcpy(myentry.name, module_name, sizeof(myentry.name));
 501         node = rbtree_finddata(module_tree, &myentry);
 502         if (node) return node;
 503         if (strlen(module_name) >= sizeof(module_struct)) {
 504                 cf_log_err(cf_sectiontoitem(cs),
 505                            "Failed to link to module '%s': Name is too long\n",
 506                            module_name);
 507                 return NULL;
 508         }
 509
 510         /*
 511          *      Link to the module's rlm_FOO{} module structure.
 512          *
 513          *      The module_name variable has the version number
 514          *      embedded in it, and we don't want that here.
 515          */
 516         strlcpy(module_struct, module_name, sizeof(module_struct));
 517         p = strrchr(module_struct, '-');
 518         if (p) *p = '\0';
 519
 520 #if !defined(WITH_LIBLTDL) && defined(HAVE_DLFCN_H) && defined(RTLD_SELF)
 521         module = lt_dlsym(RTLD_SELF, module_struct);
 522         if (module) goto open_self;
 523 #endif
 524
 525         /*
 526          *      Keep the handle around so we can dlclose() it.
 527          */
 528         handle = fr_dlopenext(module_name);
 529         if (handle == NULL) {
 530                 cf_log_err(cf_sectiontoitem(cs),
 531                            "Failed to link to module '%s': %s\n",
 532                            module_name, lt_dlerror());
 533                 return NULL;
 534         }
 535
 536         DEBUG3("    (Loaded %s, checking if it's valid)", module_name);
 537
 538         /*
 539          *      libltld MAY core here, if the handle it gives us contains
 540          *      garbage data.
 541          */
 542         module = lt_dlsym(handle, module_struct);
 543         if (!module) {
 544                 cf_log_err(cf_sectiontoitem(cs),
 545                            "Failed linking to %s structure: %s\n",
 546                            module_name, lt_dlerror());
 547                 lt_dlclose(handle);
 548                 return NULL;
 549         }
 550
 551 #if !defined(WIT_LIBLTDL) && defined (HAVE_DLFCN_H) && defined(RTLD_SELF)
 552  open_self:
 553 #endif
 554         /*
 555          *      Before doing anything else, check if it's sane.
 556          */
 557         if (module->magic != RLM_MODULE_MAGIC_NUMBER) {
 558                 lt_dlclose(handle);
 559                 cf_log_err(cf_sectiontoitem(cs),
 560                            "Invalid version in module '%s'",
 561                            module_name);
 562                 return NULL;
 563
 564         }
 565
 566         /* make room for the module type */
 567         node = rad_malloc(sizeof(*node));
 568         memset(node, 0, sizeof(*node));
 569         strlcpy(node->name, module_name, sizeof(node->name));
 570         node->module = module;
 571         node->handle = handle;
 572
 573         cf_log_module(cs, "Linked to module %s", module_name);
 574
 575         /*
 576          *      Add the module as "rlm_foo-version" to the configuration
 577          *      section.
 578          */
 579         if (!rbtree_insert(module_tree, node)) {
 580                 radlog(L_ERR, "Failed to cache module %s", module_name);
 581                 lt_dlclose(handle);
 582                 free(node);
 583                 return NULL;
 584         }
 585
 586         return node;
 587 }
 588
 589 /*
 590  *      Find a module instance.
 591  */
 592 module_instance_t *find_module_instance(CONF_SECTION *modules,
 593                                         const char *askedname, int do_link)
 594 {
 595         int check_config_safe = FALSE;
 596         CONF_SECTION *cs;
 597         const char *name1, *instname;
 598         module_instance_t *node, myNode;
 599         char module_name[256];
 600
 601         if (!modules) return NULL;
 602
 603         /*
 604          *      Look for the real name.  Ignore the first character,
 605          *      which tells the server "it's OK for this module to not
 606          *      exist."
 607          */
 608         instname = askedname;
 609         if (instname[0] == '-') instname++;
 610
 611         /*
 612          *      Module instances are declared in the modules{} block
 613          *      and referenced later by their name, which is the
 614          *      name2 from the config section, or name1 if there was
 615          *      no name2.
 616          */
 617         cs = cf_section_sub_find_name2(modules, NULL, instname);
 618         if (cs == NULL) {
 619                 radlog(L_ERR, "ERROR: Cannot find a configuration entry for module \"%s\".\n", instname);
 620                 return NULL;
 621         }
 622
 623         /*
 624          *      If there's already a module instance, return it.
 625          */
 626         strlcpy(myNode.name, instname, sizeof(myNode.name));
 627         node = rbtree_finddata(instance_tree, &myNode);
 628         if (node) return node;
 629
 630         if (!do_link) return NULL;
 631
 632         name1 = cf_section_name1(cs);
 633
 634         /*
 635          *      Found the configuration entry.
 636          */
 637         node = rad_malloc(sizeof(*node));
 638         memset(node, 0, sizeof(*node));
 639
 640         node->insthandle = NULL;
 641         node->cs = cs;
 642
 643         /*
 644          *      Names in the "modules" section aren't prefixed
 645          *      with "rlm_", so we add it here.
 646          */
 647         snprintf(module_name, sizeof(module_name), "rlm_%s", name1);
 648
 649         node->entry = linkto_module(module_name, cs);
 650         if (!node->entry) {
 651                 free(node);
 652                 /* linkto_module logs any errors */
 653                 return NULL;
 654         }
 655
 656         if (check_config && (node->entry->module->instantiate) &&
 657             (node->entry->module->type & RLM_TYPE_CHECK_CONFIG_SAFE) == 0) {
 658                 const char *value = NULL;
 659                 CONF_PAIR *cp;
 660
 661                 cp = cf_pair_find(cs, "force_check_config");
 662                 if (cp) value = cf_pair_value(cp);
 663
 664                 if (value && (strcmp(value, "yes") == 0)) goto print_inst;
 665
 666                 cf_log_module(cs, "Skipping instantiation of %s", instname);
 667         } else {
 668         print_inst:
 669                 check_config_safe = TRUE;
 670                 cf_log_module(cs, "Instantiating module \"%s\" from file %s",
 671                               instname, cf_section_filename(cs));
 672         }
 673
 674         /*
 675          *      Call the module's instantiation routine.
 676          */
 677         if ((node->entry->module->instantiate) &&
 678             (!check_config || check_config_safe) &&
 679             ((node->entry->module->instantiate)(cs, &node->insthandle) < 0)) {
 680                 cf_log_err(cf_sectiontoitem(cs),
 681                            "Instantiation failed for module \"%s\"",
 682                            instname);
 683                 free(node);
 684                 return NULL;
 685         }
 686
 687         /*
 688          *      We're done.  Fill in the rest of the data structure,
 689          *      and link it to the module instance list.
 690          */
 691         strlcpy(node->name, instname, sizeof(node->name));
 692
 693 #ifdef HAVE_PTHREAD_H
 694         /*
 695          *      If we're threaded, check if the module is thread-safe.
 696          *
 697          *      If it isn't, we create a mutex.
 698          */
 699         if ((node->entry->module->type & RLM_TYPE_THREAD_UNSAFE) != 0) {
 700                 node->mutex = (pthread_mutex_t *) rad_malloc(sizeof(pthread_mutex_t));
 701                 /*
 702                  *      Initialize the mutex.
 703                  */
 704                 pthread_mutex_init(node->mutex, NULL);
 705         } else {
 706                 /*
 707                  *      The module is thread-safe.  Don't give it a mutex.
 708                  */
 709                 node->mutex = NULL;
 710         }
 711
 712 #endif
 713         rbtree_insert(instance_tree, node);
 714
 715         return node;
 716 }
 717
 718 static indexed_modcallable *lookup_by_index(rbtree_t *components,
 719                                             int comp, int idx)
 720 {
 721         indexed_modcallable myc;
 722
 723         myc.comp = comp;
 724         myc.idx = idx;
 725
 726         return rbtree_finddata(components, &myc);
 727 }
 728
 729 /*
 730  *      Create a new sublist.
 731  */
 732 static indexed_modcallable *new_sublist(rbtree_t *components, int comp, int idx)
 733 {
 734         indexed_modcallable *c;
 735
 736         c = lookup_by_index(components, comp, idx);
 737
 738         /* It is an error to try to create a sublist that already
 739          * exists. It would almost certainly be caused by accidental
 740          * duplication in the config file.
 741          *
 742          * index 0 is the exception, because it is used when we want
 743          * to collect _all_ listed modules under a single index by
 744          * default, which is currently the case in all components
 745          * except authenticate. */
 746         if (c) {
 747                 if (idx == 0) {
 748                         return c;
 749                 }
 750                 return NULL;
 751         }
 752
 753         c = rad_malloc(sizeof(*c));
 754         c->modulelist = NULL;
 755         c->comp = comp;
 756         c->idx = idx;
 757
 758         if (!rbtree_insert(components, c)) {
 759                 free(c);
 760                 return NULL;
 761         }
 762
 763         return c;
 764 }
 765
 766 rlm_rcode_t indexed_modcall(int comp, int idx, REQUEST *request)
 767 {
 768         rlm_rcode_t rcode;
 769         modcallable *list = NULL;
 770         virtual_server_t *server;
 771
 772         /*
 773          *      Hack to find the correct virtual server.
 774          */
 775         server = virtual_server_find(request->server);
 776         if (!server) {
 777                 RDEBUG("No such virtual server \"%s\"", request->server);
 778                 return RLM_MODULE_FAIL;
 779         }
 780
 781         if (idx == 0) {
 782                 list = server->mc[comp];
 783                 if (!list) RDEBUG2W("Empty %s section.  Using default return values.", section_type_value[comp].section);
 784
 785         } else {
 786                 indexed_modcallable *this;
 787
 788                 this = lookup_by_index(server->components, comp, idx);
 789                 if (this) {
 790                         list = this->modulelist;
 791                 } else {
 792                         RDEBUG2W("Unknown value specified for %s.  Cannot perform requested action.",
 793                                 section_type_value[comp].typename);
 794                 }
 795         }
 796
 797         if (server->subcs[comp]) {
 798                 if (idx == 0) {
 799                         RDEBUG("# Executing section %s from file %s",
 800                                section_type_value[comp].section,
 801                                cf_section_filename(server->subcs[comp]));
 802                 } else {
 803                         RDEBUG("# Executing group from file %s",
 804                                cf_section_filename(server->subcs[comp]));
 805                 }
 806         }
 807         request->component = section_type_value[comp].section;
 808
 809         rcode = modcall(comp, list, request);
 810
 811         request->module = "";
 812         request->component = "<core>";
 813         return rcode;
 814 }
 815
 816 /*
 817  *      Load a sub-module list, as found inside an Auth-Type foo {}
 818  *      block
 819  */
 820 static int load_subcomponent_section(modcallable *parent, CONF_SECTION *cs,
 821                                      rbtree_t *components,
 822                                      const DICT_ATTR *dattr, int comp)
 823 {
 824         indexed_modcallable *subcomp;
 825         modcallable *ml;
 826         DICT_VALUE *dval;
 827         const char *name2 = cf_section_name2(cs);
 828
 829         rad_assert(comp >= RLM_COMPONENT_AUTH);
 830         rad_assert(comp < RLM_COMPONENT_COUNT);
 831
 832         /*
 833          *      Sanity check.
 834          */
 835         if (!name2) {
 836                 cf_log_err(cf_sectiontoitem(cs),
 837                            "No name specified for %s block",
 838                            section_type_value[comp].typename);
 839                 return 1;
 840         }
 841
 842         /*
 843          *      Compile the group.
 844          */
 845         ml = compile_modgroup(parent, comp, cs);
 846         if (!ml) {
 847                 return 0;
 848         }
 849
 850         /*
 851          *      We must assign a numeric index to this subcomponent.
 852          *      It is generated and placed in the dictionary
 853          *      automatically.  If it isn't found, it's a serious
 854          *      error.
 855          */
 856         dval = dict_valbyname(dattr->attr, dattr->vendor, name2);
 857         if (!dval) {
 858                 cf_log_err(cf_sectiontoitem(cs),
 859                            "%s %s Not previously configured",
 860                            section_type_value[comp].typename, name2);
 861                 modcallable_free(&ml);
 862                 return 0;
 863         }
 864
 865         subcomp = new_sublist(components, comp, dval->value);
 866         if (!subcomp) {
 867                 modcallable_free(&ml);
 868                 return 1;
 869         }
 870
 871         subcomp->modulelist = ml;
 872         return 1;               /* OK */
 873 }
 874
 875 static int define_type(const DICT_ATTR *dattr, const char *name)
 876 {
 877         uint32_t value;
 878         DICT_VALUE *dval;
 879
 880         /*
 881          *      If the value already exists, don't
 882          *      create it again.
 883          */
 884         dval = dict_valbyname(dattr->attr, dattr->vendor, name);
 885         if (dval) return 1;
 886
 887         /*
 888          *      Create a new unique value with a
 889          *      meaningless number.  You can't look at
 890          *      it from outside of this code, so it
 891          *      doesn't matter.  The only requirement
 892          *      is that it's unique.
 893          */
 894         do {
 895                 value = fr_rand() & 0x00ffffff;
 896         } while (dict_valbyattr(dattr->attr, dattr->vendor, value));
 897
 898         DEBUG2("  Module: Creating %s = %s", dattr->name, name);
 899         if (dict_addvalue(name, dattr->name, value) < 0) {
 900                 radlog(L_ERR, "%s", fr_strerror());
 901                 return 0;
 902         }
 903
 904         return 1;
 905 }
 906
 907 static int load_component_section(CONF_SECTION *cs,
 908                                   rbtree_t *components, int comp)
 909 {
 910         modcallable *this;
 911         CONF_ITEM *modref;
 912         int idx;
 913         indexed_modcallable *subcomp;
 914         const char *modname;
 915         const char *visiblename;
 916         const DICT_ATTR *dattr;
 917
 918         /*
 919          *      Find the attribute used to store VALUEs for this section.
 920          */
 921         dattr = dict_attrbyvalue(section_type_value[comp].attr, 0);
 922         if (!dattr) {
 923                 cf_log_err(cf_sectiontoitem(cs),
 924                            "No such attribute %s",
 925                            section_type_value[comp].typename);
 926                 return -1;
 927         }
 928
 929         /*
 930          *      Loop over the entries in the named section, loading
 931          *      the sections this time.
 932          */
 933         for (modref = cf_item_find_next(cs, NULL);
 934              modref != NULL;
 935              modref = cf_item_find_next(cs, modref)) {
 936                 const char *name1;
 937                 CONF_PAIR *cp = NULL;
 938                 CONF_SECTION *scs = NULL;
 939
 940                 if (cf_item_is_section(modref)) {
 941                         scs = cf_itemtosection(modref);
 942
 943                         name1 = cf_section_name1(scs);
 944
 945                         if (strcmp(name1,
 946                                    section_type_value[comp].typename) == 0) {
 947                                 if (!load_subcomponent_section(NULL, scs,
 948                                                                components,
 949                                                                dattr,
 950                                                                comp)) {
 951                                         return -1; /* FIXME: memleak? */
 952                                 }
 953                                 continue;
 954                         }
 955
 956                         cp = NULL;
 957
 958                 } else if (cf_item_is_pair(modref)) {
 959                         cp = cf_itemtopair(modref);
 960
 961                 } else {
 962                         continue; /* ignore it */
 963                 }
 964
 965                 /*
 966                  *      Try to compile one entry.
 967                  */
 968                 this = compile_modsingle(NULL, comp, modref, &modname);
 969
 970                 /*
 971                  *      It's OK for the module to not exist.
 972                  */
 973                 if (!this && modname && (modname[0] == '-')) {
 974                         DEBUGW("Not loading module \"%s\" as it is not enabled", modname + 1);
 975                         continue;
 976                 }
 977
 978                 if (!this) {
 979                         cf_log_err(cf_sectiontoitem(cs),
 980                                    "Errors parsing %s section.\n",
 981                                    cf_section_name1(cs));
 982                         return -1;
 983                 }
 984
 985                 /*
 986                  *      Look for Auth-Type foo {}, which are special
 987                  *      cases of named sections, and allowable ONLY
 988                  *      at the top-level.
 989                  *
 990                  *      i.e. They're not allowed in a "group" or "redundant"
 991                  *      subsection.
 992                  */
 993                 if (comp == RLM_COMPONENT_AUTH) {
 994                         DICT_VALUE *dval;
 995                         const char *modrefname = NULL;
 996                         if (cp) {
 997                                 modrefname = cf_pair_attr(cp);
 998                         } else {
 999                                 modrefname = cf_section_name2(scs);
1000                                 if (!modrefname) {
1001                                         modcallable_free(&this);
1002                                         cf_log_err(cf_sectiontoitem(cs),
1003                                                    "Errors parsing %s sub-section.\n",
1004                                                    cf_section_name1(scs));
1005                                         return -1;
1006                                 }
1007                         }
1008
1009                         dval = dict_valbyname(PW_AUTH_TYPE, 0, modrefname);
1010                         if (!dval) {
1011                                 /*
1012                                  *      It's a section, but nothing we
1013                                  *      recognize.  Die!
1014                                  */
1015                                 modcallable_free(&this);
1016                                 cf_log_err(cf_sectiontoitem(cs),
1017                                            "Unknown Auth-Type \"%s\" in %s sub-section.",
1018                                            modrefname, section_type_value[comp].section);
1019                                 return -1;
1020                         }
1021                         idx = dval->value;
1022                 } else {
1023                         /* See the comment in new_sublist() for explanation
1024                          * of the special index 0 */
1025                         idx = 0;
1026                 }
1027
1028                 subcomp = new_sublist(components, comp, idx);
1029                 if (subcomp == NULL) {
1030                         modcallable_free(&this);
1031                         continue;
1032                 }
1033
1034                 /* If subcomp->modulelist is NULL, add_to_modcallable will
1035                  * create it */
1036                 visiblename = cf_section_name2(cs);
1037                 if (visiblename == NULL)
1038                         visiblename = cf_section_name1(cs);
1039                 add_to_modcallable(&subcomp->modulelist, this,
1040                                    comp, visiblename);
1041         }
1042
1043         return 0;
1044 }
1045
1046 static int load_byserver(CONF_SECTION *cs)
1047 {
1048         int comp, flag;
1049         const char *name = cf_section_name2(cs);
1050         rbtree_t *components;
1051         virtual_server_t *server = NULL;
1052         indexed_modcallable *c;
1053
1054         if (name) {
1055                 cf_log_info(cs, "server %s { # from file %s",
1056                             name, cf_section_filename(cs));
1057         } else {
1058                 cf_log_info(cs, "server { # from file %s",
1059                             cf_section_filename(cs));
1060         }
1061
1062         cf_log_info(cs, " modules {");
1063
1064         components = rbtree_create(indexed_modcallable_cmp,
1065                                    indexed_modcallable_free, 0);
1066         if (!components) {
1067                 radlog(L_ERR, "Failed to initialize components\n");
1068                 goto error;
1069         }
1070
1071         server = rad_malloc(sizeof(*server));
1072         memset(server, 0, sizeof(*server));
1073
1074         server->name = name;
1075         server->created = time(NULL);
1076         server->cs = cs;
1077         server->components = components;
1078
1079         /*
1080          *      Define types first.
1081          */
1082         for (comp = 0; comp < RLM_COMPONENT_COUNT; ++comp) {
1083                 CONF_SECTION *subcs;
1084                 CONF_ITEM *modref;
1085                 const DICT_ATTR *dattr;
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                 /*
1094                  *      Find the attribute used to store VALUEs for this section.
1095                  */
1096                 dattr = dict_attrbyvalue(section_type_value[comp].attr, 0);
1097                 if (!dattr) {
1098                         cf_log_err(cf_sectiontoitem(subcs),
1099                                    "No such attribute %s",
1100                                    section_type_value[comp].typename);
1101                 error:
1102                         if (debug_flag == 0) {
1103                                 radlog(L_ERR, "Failed to load virtual server %s",
1104                                        (name != NULL) ? name : "<default>");
1105                         }
1106                         virtual_server_free(server);
1107                         return -1;
1108                 }
1109
1110                 /*
1111                  *      Define dynamic types, so that others can reference
1112                  *      them.
1113                  */
1114                 for (modref = cf_item_find_next(subcs, NULL);
1115                      modref != NULL;
1116                      modref = cf_item_find_next(subcs, modref)) {
1117                         const char *name1;
1118                         CONF_SECTION *subsubcs;
1119
1120                         /*
1121                          *      Create types for simple references
1122                          *      only when parsing the authenticate
1123                          *      section.
1124                          */
1125                         if ((section_type_value[comp].attr == PW_AUTH_TYPE) &&
1126                             cf_item_is_pair(modref)) {
1127                                 CONF_PAIR *cp = cf_itemtopair(modref);
1128                                 if (!define_type(dattr, cf_pair_attr(cp))) {
1129                                         goto error;
1130                                 }
1131
1132                                 continue;
1133                         }
1134
1135                         if (!cf_item_is_section(modref)) continue;
1136
1137                         subsubcs = cf_itemtosection(modref);
1138                         name1 = cf_section_name1(subsubcs);
1139
1140                         if (strcmp(name1, section_type_value[comp].typename) == 0) {
1141                                 if (!define_type(dattr,
1142                                                  cf_section_name2(subsubcs))) {
1143                                         goto error;
1144                                 }
1145                         }
1146                 }
1147         } /* loop over components */
1148
1149         /*
1150          *      Loop over all of the known components, finding their
1151          *      configuration section, and loading it.
1152          */
1153         flag = 0;
1154         for (comp = 0; comp < RLM_COMPONENT_COUNT; ++comp) {
1155                 CONF_SECTION *subcs;
1156
1157                 subcs = cf_section_sub_find(cs,
1158                                             section_type_value[comp].section);
1159                 if (!subcs) continue;
1160
1161                 if (cf_item_find_next(subcs, NULL) == NULL) continue;
1162
1163                 cf_log_module(cs, "Checking %s {...} for more modules to load",
1164                        section_type_value[comp].section);
1165
1166                 /*
1167                  *      Skip pre/post-proxy sections if we're not
1168                  *      proxying.
1169                  */
1170                 if (
1171 #ifdef WITH_PROXY
1172                     !mainconfig.proxy_requests &&
1173 #endif
1174                     ((comp == RLM_COMPONENT_PRE_PROXY) ||
1175                      (comp == RLM_COMPONENT_POST_PROXY))) {
1176                         continue;
1177                 }
1178
1179 #ifndef WITH_ACCOUNTING
1180                 if (comp == RLM_COMPONENT_ACCT) continue;
1181 #endif
1182
1183 #ifndef WITH_SESSION_MGMT
1184                 if (comp == RLM_COMPONENT_SESS) continue;
1185 #endif
1186
1187                 if (load_component_section(subcs, components, comp) < 0) {
1188                         goto error;
1189                 }
1190
1191                 /*
1192                  *      Cache a default, if it exists.  Some people
1193                  *      put empty sections for some reason...
1194                  */
1195                 c = lookup_by_index(components, comp, 0);
1196                 if (c) server->mc[comp] = c->modulelist;
1197
1198                 server->subcs[comp] = subcs;
1199
1200                 flag = 1;
1201         } /* loop over components */
1202
1203         /*
1204          *      We haven't loaded any of the normal sections.  Maybe we're
1205          *      supposed to load the vmps section.
1206          *
1207          *      This is a bit of a hack...
1208          */
1209         if (!flag) {
1210                 CONF_SECTION *subcs;
1211
1212                 subcs = cf_section_sub_find(cs, "vmps");
1213                 if (subcs) {
1214                         cf_log_module(cs, "Checking vmps {...} for more modules to load");
1215                         if (load_component_section(subcs, components,
1216                                                    RLM_COMPONENT_POST_AUTH) < 0) {
1217                                 goto error;
1218                         }
1219                         c = lookup_by_index(components,
1220                                             RLM_COMPONENT_POST_AUTH, 0);
1221                         if (c) server->mc[RLM_COMPONENT_POST_AUTH] = c->modulelist;
1222                         flag = 1;
1223                 }
1224
1225 #ifdef WITH_DHCP
1226                 if (!flag) {
1227                         const DICT_ATTR *dattr;
1228
1229                         dattr = dict_attrbyname("DHCP-Message-Type");
1230
1231                         /*
1232                          *      Handle each DHCP Message type separately.
1233                          */
1234                         if (dattr) for (subcs = cf_subsection_find_next(cs, NULL, "dhcp");
1235                                         subcs != NULL;
1236                                         subcs = cf_subsection_find_next(cs, subcs,
1237                                                                         "dhcp")) {
1238                                 const char *name2 = cf_section_name2(subcs);
1239
1240                                 DEBUG2(" Module: Checking dhcp %s {...} for more modules to load", name2);
1241                                 if (!load_subcomponent_section(NULL, subcs,
1242                                                                components,
1243                                                                dattr,
1244                                                                RLM_COMPONENT_POST_AUTH)) {
1245                                         goto error; /* FIXME: memleak? */
1246                                 }
1247                                 c = lookup_by_index(components,
1248                                                     RLM_COMPONENT_POST_AUTH, 0);
1249                                 if (c) server->mc[RLM_COMPONENT_POST_AUTH] = c->modulelist;
1250                                 flag = 1;
1251                         }
1252                 }
1253 #endif
1254         }
1255
1256         cf_log_info(cs, " } # modules");
1257         cf_log_info(cs, "} # server");
1258
1259         if (!flag && name) {
1260                 DEBUGW("Server %s is empty, and will do nothing!",
1261                       name);
1262         }
1263
1264         if (debug_flag == 0) {
1265                 radlog(L_INFO, "Loaded virtual server %s",
1266                        (name != NULL) ? name : "<default>");
1267         }
1268
1269         /*
1270          *      Now that it is OK, insert it into the list.
1271          *
1272          *      This is thread-safe...
1273          */
1274         comp = virtual_server_idx(name);
1275         server->next = virtual_servers[comp];
1276         virtual_servers[comp] = server;
1277
1278         /*
1279          *      Mark OLDER ones of the same name as being unused.
1280          */
1281         server = server->next;
1282         while (server) {
1283                 if ((!name && !server->name) ||
1284                     (name && server->name &&
1285                      (strcmp(server->name, name) == 0))) {
1286                         server->can_free = TRUE;
1287                         break;
1288                 }
1289                 server = server->next;
1290         }
1291
1292         return 0;
1293 }
1294
1295
1296 /*
1297  *      Load all of the virtual servers.
1298  */
1299 int virtual_servers_load(CONF_SECTION *config)
1300 {
1301         CONF_SECTION *cs;
1302         static int first_time = TRUE;
1303
1304         DEBUG2("%s: #### Loading Virtual Servers ####", mainconfig.name);
1305
1306         /*
1307          *      If we have "server { ...}", then there SHOULD NOT be
1308          *      bare "authorize", etc. sections.  if there is no such
1309          *      server, then try to load the old-style sections first.
1310          *
1311          *      In either case, load the "default" virtual server first.
1312          *      this matches better iwth users expectations.
1313          */
1314         cs = cf_section_find_name2(cf_subsection_find_next(config, NULL,
1315                                                            "server"),
1316                                    "server", NULL);
1317         if (cs) {
1318                 if (load_byserver(cs) < 0) {
1319                         return -1;
1320                 }
1321         } else {
1322                 if (load_byserver(config) < 0) {
1323                         return -1;
1324                 }
1325         }
1326
1327         /*
1328          *      Load all of the virtual servers.
1329          */
1330         for (cs = cf_subsection_find_next(config, NULL, "server");
1331              cs != NULL;
1332              cs = cf_subsection_find_next(config, cs, "server")) {
1333                 const char *name2;
1334                 virtual_server_t *server;
1335
1336                 name2 = cf_section_name2(cs);
1337                 if (!name2) continue; /* handled above */
1338
1339                 server = virtual_server_find(name2);
1340                 if (server &&
1341                     (cf_top_section(server->cs) == config)) {
1342                         radlog(L_ERR, "Duplicate virtual server \"%s\" in file %s:%d and file %s:%d",
1343                                server->name,
1344                                cf_section_filename(server->cs),
1345                                cf_section_lineno(server->cs),
1346                                cf_section_filename(cs),
1347                                cf_section_lineno(cs));
1348                         return -1;
1349                 }
1350
1351                 if (load_byserver(cs) < 0) {
1352                         /*
1353                          *      Once we successfully started once,
1354                          *      continue loading the OTHER servers,
1355                          *      even if one fails.
1356                          */
1357                         if (!first_time) continue;
1358                         return -1;
1359                 }
1360         }
1361
1362         /*
1363          *      If we succeed the first time around, remember that.
1364          */
1365         first_time = FALSE;
1366
1367         return 0;
1368 }
1369
1370 int module_hup_module(CONF_SECTION *cs, module_instance_t *node, time_t when)
1371 {
1372         void *insthandle = NULL;
1373         fr_module_hup_t *mh;
1374
1375         if (!node ||
1376             !node->entry->module->instantiate ||
1377             ((node->entry->module->type & RLM_TYPE_HUP_SAFE) == 0)) {
1378                 return 1;
1379         }
1380
1381         cf_log_module(cs, "Trying to reload module \"%s\"", node->name);
1382
1383         if ((node->entry->module->instantiate)(cs, &insthandle) < 0) {
1384                 cf_log_err(cf_sectiontoitem(cs),
1385                            "HUP failed for module \"%s\".  Using old configuration.",
1386                            node->name);
1387                 return 0;
1388         }
1389
1390         radlog(L_INFO, " Module: Reloaded module \"%s\"", node->name);
1391
1392         module_instance_free_old(cs, node, when);
1393
1394         /*
1395          *      Save the old instance handle for later deletion.
1396          */
1397         mh = rad_malloc(sizeof(*mh));
1398         mh->mi = node;
1399         mh->when = when;
1400         mh->insthandle = node->insthandle;
1401         mh->next = node->mh;
1402         node->mh = mh;
1403
1404         node->insthandle = insthandle;
1405
1406         /*
1407          *      FIXME: Set a timeout to come back in 60s, so that
1408          *      we can pro-actively clean up the old instances.
1409          */
1410
1411         return 1;
1412 }
1413
1414
1415 int module_hup(CONF_SECTION *modules)
1416 {
1417         time_t when;
1418         CONF_ITEM *ci;
1419         CONF_SECTION *cs;
1420         module_instance_t *node;
1421
1422         if (!modules) return 0;
1423
1424         when = time(NULL);
1425
1426         /*
1427          *      Loop over the modules
1428          */
1429         for (ci=cf_item_find_next(modules, NULL);
1430              ci != NULL;
1431              ci=cf_item_find_next(modules, ci)) {
1432                 const char *instname;
1433                 module_instance_t myNode;
1434
1435                 /*
1436                  *      If it's not a section, ignore it.
1437                  */
1438                 if (!cf_item_is_section(ci)) continue;
1439
1440                 cs = cf_itemtosection(ci);
1441                 instname = cf_section_name2(cs);
1442                 if (!instname) instname = cf_section_name1(cs);
1443
1444                 strlcpy(myNode.name, instname, sizeof(myNode.name));
1445                 node = rbtree_finddata(instance_tree, &myNode);
1446
1447                 module_hup_module(cs, node, when);
1448         }
1449
1450         return 1;
1451 }
1452
1453
1454 /*
1455  *      Parse the module config sections, and load
1456  *      and call each module's init() function.
1457  *
1458  *      Libtool makes your life a LOT easier, especially with libltdl.
1459  *      see: http://www.gnu.org/software/libtool/
1460  */
1461 int setup_modules(int reload, CONF_SECTION *config)
1462 {
1463         CONF_ITEM       *ci, *next;
1464         CONF_SECTION    *cs, *modules;
1465         rad_listen_t    *listener;
1466
1467         if (reload) return 0;
1468
1469         /*
1470          *      If necessary, initialize libltdl.
1471          */
1472         if (!reload) {
1473                 /*
1474                  *      This line works around a completely
1475                  *
1476                  *              RIDICULOUS INSANE IDIOTIC
1477                  *
1478                  *      bug in libltdl on certain systems.  The "set
1479                  *      preloaded symbols" macro below ends up
1480                  *      referencing this name, but it isn't defined
1481                  *      anywhere in the libltdl source.  As a result,
1482                  *      any program STUPID enough to rely on libltdl
1483                  *      fails to link, because the symbol isn't
1484                  *      defined anywhere.
1485                  *
1486                  *      It's like libtool and libltdl are some kind
1487                  *      of sick joke.
1488                  */
1489 #ifdef IE_LIBTOOL_DIE
1490 #define lt__PROGRAM__LTX_preloaded_symbols lt_libltdl_LTX_preloaded_symbols
1491 #endif
1492
1493                 /*
1494                  *      Set the default list of preloaded symbols.
1495                  *      This is used to initialize libltdl's list of
1496                  *      preloaded modules.
1497                  *
1498                  *      i.e. Static modules.
1499                  */
1500                 LTDL_SET_PRELOADED_SYMBOLS();
1501
1502                 if (lt_dlinit() != 0) {
1503                         radlog(L_ERR, "Failed to initialize libraries: %s\n",
1504                                         lt_dlerror());
1505                         return -1;
1506                 }
1507
1508                 /*
1509                  *      Set the search path to ONLY our library directory.
1510                  *      This prevents the modules from being found from
1511                  *      any location on the disk.
1512                  */
1513                 lt_dlsetsearchpath(radlib_dir);
1514
1515                 /*
1516                  *      Set up the internal module struct.
1517                  */
1518                 module_tree = rbtree_create(module_entry_cmp,
1519                                             module_entry_free, 0);
1520                 if (!module_tree) {
1521                         radlog(L_ERR, "Failed to initialize modules\n");
1522                         return -1;
1523                 }
1524
1525                 instance_tree = rbtree_create(module_instance_cmp,
1526                                               module_instance_free, 0);
1527                 if (!instance_tree) {
1528                         radlog(L_ERR, "Failed to initialize modules\n");
1529                         return -1;
1530                 }
1531         }
1532
1533         memset(virtual_servers, 0, sizeof(virtual_servers));
1534
1535         /*
1536          *      Remember where the modules were stored.
1537          */
1538         modules = cf_section_sub_find(config, "modules");
1539         if (!modules) {
1540                 radlog(L_INFO, "WARNING: Cannot find a \"modules\" section in the configuration file!");
1541         }
1542
1543         DEBUG2("%s: #### Instantiating modules ####", mainconfig.name);
1544
1545         /*
1546          *      Loop over module definitions, looking for duplicates.
1547          *
1548          *      This is O(N^2) in the number of modules, but most
1549          *      systems should have less than 100 modules.
1550          */
1551         for (ci=cf_item_find_next(modules, NULL);
1552              ci != NULL;
1553              ci=next) {
1554                 const char *name1, *name2;
1555                 CONF_SECTION *subcs, *duplicate;
1556
1557                 next = cf_item_find_next(modules, ci);
1558
1559                 if (!cf_item_is_section(ci)) continue;
1560
1561                 if (!next || !cf_item_is_section(next)) continue;
1562
1563                 subcs = cf_itemtosection(ci);
1564                 name1 = cf_section_name1(subcs);
1565                 name2 = cf_section_name2(subcs);
1566
1567                 duplicate = cf_section_find_name2(cf_itemtosection(next),
1568                                                   name1, name2);
1569                 if (!duplicate) continue;
1570
1571                 if (!name2) name2 = "";
1572
1573                 radlog(L_ERR, "Duplicate module \"%s %s\", in file %s:%d and file %s:%d",
1574                        name1, name2,
1575                        cf_section_filename(subcs),
1576                        cf_section_lineno(subcs),
1577                        cf_section_filename(duplicate),
1578                        cf_section_lineno(duplicate));
1579                 return -1;
1580         }
1581
1582         /*
1583          *  Look for the 'instantiate' section, which tells us
1584          *  the instantiation order of the modules, and also allows
1585          *  us to load modules with no authorize/authenticate/etc.
1586          *  sections.
1587          */
1588         cs = cf_section_sub_find(config, "instantiate");
1589         if (cs != NULL) {
1590                 CONF_PAIR *cp;
1591                 module_instance_t *module;
1592                 const char *name;
1593
1594                 cf_log_info(cs, " instantiate {");
1595
1596                 /*
1597                  *  Loop over the items in the 'instantiate' section.
1598                  */
1599                 for (ci=cf_item_find_next(cs, NULL);
1600                      ci != NULL;
1601                      ci=cf_item_find_next(cs, ci)) {
1602
1603                         /*
1604                          *      Skip sections and "other" stuff.
1605                          *      Sections will be handled later, if
1606                          *      they're referenced at all...
1607                          */
1608                         if (!cf_item_is_pair(ci)) {
1609                                 continue;
1610                         }
1611
1612                         cp = cf_itemtopair(ci);
1613                         name = cf_pair_attr(cp);
1614                         module = find_module_instance(modules, name, 1);
1615                         if (!module && (name[0] != '-')) {
1616                                 return -1;
1617                         }
1618                 } /* loop over items in the subsection */
1619
1620                 cf_log_info(cs, " }");
1621         } /* if there's an 'instantiate' section. */
1622
1623         /*
1624          *      Loop over the listeners, figuring out which sections
1625          *      to load.
1626          */
1627         for (listener = mainconfig.listen;
1628              listener != NULL;
1629              listener = listener->next) {
1630                 char buffer[256];
1631
1632 #ifdef WITH_PROXY
1633                 if (listener->type == RAD_LISTEN_PROXY) continue;
1634 #endif
1635
1636                 cs = cf_section_sub_find_name2(config,
1637                                                "server", listener->server);
1638                 if (!cs && (listener->server != NULL)) {
1639                         listener->print(listener, buffer, sizeof(buffer));
1640
1641                         radlog(L_ERR, "No server has been defined for %s", buffer);
1642                         return -1;
1643                 }
1644         }
1645
1646         if (virtual_servers_load(config) < 0) return -1;
1647
1648         return 0;
1649 }
1650
1651 /*
1652  *      Call all authorization modules until one returns
1653  *      somethings else than RLM_MODULE_OK
1654  */
1655 rlm_rcode_t module_authorize(int autz_type, REQUEST *request)
1656 {
1657         return indexed_modcall(RLM_COMPONENT_AUTZ, autz_type, request);
1658 }
1659
1660 /*
1661  *      Authenticate a user/password with various methods.
1662  */
1663 rlm_rcode_t module_authenticate(int auth_type, REQUEST *request)
1664 {
1665         return indexed_modcall(RLM_COMPONENT_AUTH, auth_type, request);
1666 }
1667
1668 #ifdef WITH_ACCOUNTING
1669 /*
1670  *      Do pre-accounting for ALL configured sessions
1671  */
1672 rlm_rcode_t module_preacct(REQUEST *request)
1673 {
1674         return indexed_modcall(RLM_COMPONENT_PREACCT, 0, request);
1675 }
1676
1677 /*
1678  *      Do accounting for ALL configured sessions
1679  */
1680 rlm_rcode_t module_accounting(int acct_type, REQUEST *request)
1681 {
1682         return indexed_modcall(RLM_COMPONENT_ACCT, acct_type, request);
1683 }
1684 #endif
1685
1686 #ifdef WITH_SESSION_MGMT
1687 /*
1688  *      See if a user is already logged in.
1689  *
1690  *      Returns: 0 == OK, 1 == double logins, 2 == multilink attempt
1691  */
1692 int module_checksimul(int sess_type, REQUEST *request, int maxsimul)
1693 {
1694         rlm_rcode_t rcode;
1695
1696         if(!request->username)
1697                 return 0;
1698
1699         request->simul_count = 0;
1700         request->simul_max = maxsimul;
1701         request->simul_mpp = 1;
1702
1703         rcode = indexed_modcall(RLM_COMPONENT_SESS, sess_type, request);
1704
1705         if (rcode != RLM_MODULE_OK) {
1706                 /* FIXME: Good spot for a *rate-limited* warning to the log */
1707                 return 0;
1708         }
1709
1710         return (request->simul_count < maxsimul) ? 0 : request->simul_mpp;
1711 }
1712 #endif
1713
1714 #ifdef WITH_PROXY
1715 /*
1716  *      Do pre-proxying for ALL configured sessions
1717  */
1718 rlm_rcode_t module_pre_proxy(int type, REQUEST *request)
1719 {
1720         return indexed_modcall(RLM_COMPONENT_PRE_PROXY, type, request);
1721 }
1722
1723 /*
1724  *      Do post-proxying for ALL configured sessions
1725  */
1726 rlm_rcode_t module_post_proxy(int type, REQUEST *request)
1727 {
1728         return indexed_modcall(RLM_COMPONENT_POST_PROXY, type, request);
1729 }
1730 #endif
1731
1732 /*
1733  *      Do post-authentication for ALL configured sessions
1734  */
1735 rlm_rcode_t module_post_auth(int postauth_type, REQUEST *request)
1736 {
1737         return indexed_modcall(RLM_COMPONENT_POST_AUTH, postauth_type, request);
1738 }
1739
1740 #ifdef WITH_COA
1741 rlm_rcode_t module_recv_coa(int recv_coa_type, REQUEST *request)
1742 {
1743         return indexed_modcall(RLM_COMPONENT_RECV_COA, recv_coa_type, request);
1744 }
1745
1746 rlm_rcode_t module_send_coa(int send_coa_type, REQUEST *request)
1747 {
1748         return indexed_modcall(RLM_COMPONENT_SEND_COA, send_coa_type, request);
1749 }
1750 #endif
1751
1752 char *module_failure_msg(REQUEST *request, const char *fmt, ...)
1753 {
1754         va_list ap;
1755         VALUE_PAIR *vp;
1756
1757         va_start(ap, fmt);
1758         vp = paircreate(PW_MODULE_FAILURE_MESSAGE, 0);
1759         if (!vp) {
1760                 va_end(ap);
1761                 return NULL;
1762         }
1763
1764         vsnprintf(vp->vp_strvalue, sizeof(vp->vp_strvalue), fmt, ap);
1765
1766         pairadd(&request->packet->vps, vp);
1767
1768         return vp->vp_strvalue;
1769 }