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 typedef struct indexed_modcallable {
  34         int comp;
  35         int idx;
  36         modcallable *modulelist;
  37 } indexed_modcallable;
  38
  39 /*
  40  *      For each component, keep an ordered list of ones to call.
  41  */
  42 static rbtree_t *components;
  43
  44 static rbtree_t *module_tree = NULL;
  45
  46 typedef struct section_type_value_t {
  47         const char      *section;
  48         const char      *typename;
  49         int             attr;
  50 } section_type_value_t;
  51
  52
  53 /*
  54  *      Ordered by component
  55  */
  56 static const section_type_value_t section_type_value[RLM_COMPONENT_COUNT] = {
  57         { "authenticate", "Auth-Type",       PW_AUTH_TYPE },
  58         { "authorize",    "Autz-Type",       PW_AUTZ_TYPE },
  59         { "preacct",      "Pre-Acct-Type",   PW_PRE_ACCT_TYPE },
  60         { "accounting",   "Acct-Type",       PW_ACCT_TYPE },
  61         { "session",      "Session-Type",    PW_SESSION_TYPE },
  62         { "pre-proxy",    "Pre-Proxy-Type",  PW_PRE_PROXY_TYPE },
  63         { "post-proxy",   "Post-Proxy-Type", PW_POST_PROXY_TYPE },
  64         { "post-auth",    "Post-Auth-Type",  PW_POST_AUTH_TYPE },
  65 };
  66
  67 /*
  68  *      Delete ASAP.
  69  */
  70 static const section_type_value_t old_section_type_value[] = {
  71         { "authenticate", "authtype", PW_AUTH_TYPE },
  72         { "authorize",    "autztype", PW_AUTZ_TYPE },
  73         { "preacct",      "Pre-Acct-Type",   PW_PRE_ACCT_TYPE },/* unused */
  74         { "accounting",   "acctype", PW_ACCT_TYPE },
  75         { "session",      "sesstype", PW_SESSION_TYPE },
  76         { "pre-proxy",    "Pre-Proxy-Type",  PW_PRE_PROXY_TYPE }, /* unused */
  77         { "post-proxy",   "Post-Proxy-Type", PW_POST_PROXY_TYPE }, /* unused */
  78         { "post-auth",    "post-authtype", PW_POST_AUTH_TYPE }
  79 };
  80
  81
  82 static void indexed_modcallable_free(void *data)
  83 {
  84         indexed_modcallable *c = data;
  85
  86         modcallable_free(&c->modulelist);
  87         free(c);
  88 }
  89
  90 static int indexed_modcallable_cmp(const void *one, const void *two)
  91 {
  92         const indexed_modcallable *a = one;
  93         const indexed_modcallable *b = two;
  94
  95         if (a->comp < b->comp) return -1;
  96         if (a->comp >  b->comp) return +1;
  97
  98         return a->idx - b->idx;
  99 }
 100
 101
 102 /*
 103  *      Free a module instance.
 104  */
 105 static void module_instance_free(void *data)
 106 {
 107         module_instance_t *this = data;
 108
 109         if (this->entry->module->detach)
 110                 (this->entry->module->detach)(this->insthandle);
 111 #ifdef HAVE_PTHREAD_H
 112         if (this->mutex) {
 113                 /*
 114                  *      FIXME
 115                  *      The mutex MIGHT be locked...
 116                  *      we'll check for that later, I guess.
 117                  */
 118                 pthread_mutex_destroy(this->mutex);
 119                 free(this->mutex);
 120         }
 121 #endif
 122         free(this);
 123 }
 124
 125
 126 /*
 127  *      Compare two module entries
 128  */
 129 static int module_entry_cmp(const void *one, const void *two)
 130 {
 131         const module_entry_t *a = one;
 132         const module_entry_t *b = two;
 133
 134         return strcmp(a->name, b->name);
 135 }
 136
 137 /*
 138  *      Free a module entry.
 139  */
 140 static void module_entry_free(void *data)
 141 {
 142         module_entry_t *this = data;
 143
 144         lt_dlclose(this->handle);       /* ignore any errors */
 145         free(this);
 146 }
 147
 148
 149 /*
 150  *      Remove the module lists.
 151  */
 152 int detach_modules(void)
 153 {
 154         rbtree_free(components);
 155         rbtree_free(module_tree);
 156
 157         return 0;
 158 }
 159
 160
 161 /*
 162  *      Find a module on disk or in memory, and link to it.
 163  */
 164 static module_entry_t *linkto_module(const char *module_name,
 165                                      const char *cffilename, int cflineno)
 166 {
 167         module_entry_t myentry;
 168         module_entry_t *node;
 169         lt_dlhandle handle;
 170         char module_struct[256];
 171         char *p;
 172         const void *module;
 173
 174         strlcpy(myentry.name, module_name, sizeof(myentry.name));
 175         node = rbtree_finddata(module_tree, &myentry);
 176         if (node) return node;
 177
 178         /*
 179          *      Keep the handle around so we can dlclose() it.
 180          */
 181         handle = lt_dlopenext(module_name);
 182         if (handle == NULL) {
 183                 radlog(L_ERR|L_CONS, "%s[%d] Failed to link to module '%s':"
 184                        " %s\n", cffilename, cflineno, module_name, lt_dlerror());
 185                 return NULL;
 186         }
 187
 188         /*
 189          *      Link to the module's rlm_FOO{} module structure.
 190          *
 191          *      The module_name variable has the version number
 192          *      embedded in it, and we don't want that here.
 193          */
 194         strcpy(module_struct, module_name);
 195         p = strrchr(module_struct, '-');
 196         if (p) *p = '\0';
 197
 198         DEBUG3("    (Loaded %s, checking if it's valid)", module_name);
 199
 200         /*
 201          *      libltld MAY core here, if the handle it gives us contains
 202          *      garbage data.
 203          */
 204         module = lt_dlsym(handle, module_struct);
 205         if (!module) {
 206                 radlog(L_ERR|L_CONS, "%s[%d] Failed linking to "
 207                                 "%s structure in %s: %s\n",
 208                                 cffilename, cflineno,
 209                                 module_name, cffilename, lt_dlerror());
 210                 lt_dlclose(handle);
 211                 return NULL;
 212         }
 213         /*
 214          *      Before doing anything else, check if it's sane.
 215          */
 216         if ((*(const uint32_t *) module) != RLM_MODULE_MAGIC_NUMBER) {
 217                 lt_dlclose(handle);
 218                 radlog(L_ERR|L_CONS, "%s[%d] Invalid version in module '%s'",
 219                        cffilename, cflineno, module_name);
 220                 return NULL;
 221
 222         }
 223
 224         /* make room for the module type */
 225         node = rad_malloc(sizeof(*node));
 226         memset(node, 0, sizeof(*node));
 227         strlcpy(node->name, module_name, sizeof(node->name));
 228         node->module = module;
 229         node->handle = handle;
 230
 231         DEBUG(" Module: Linked to module %s", module_name);
 232
 233         /*
 234          *      Add the module as "rlm_foo-version" to the configuration
 235          *      section.
 236          */
 237         if (!rbtree_insert(module_tree, node)) {
 238                 radlog(L_ERR, "Failed to cache module %s", module_name);
 239                 lt_dlclose(handle);
 240                 free(node);
 241                 return NULL;
 242         }
 243
 244         return node;
 245 }
 246
 247 /*
 248  *      Find a module instance.
 249  */
 250 module_instance_t *find_module_instance(CONF_SECTION *modules,
 251                                         const char *instname)
 252 {
 253         CONF_SECTION *cs;
 254         const char *name1, *name2;
 255         module_instance_t *node;
 256         char module_name[256];
 257
 258         if (!modules) return NULL;
 259
 260         /*
 261          *      Module instances are declared in the modules{} block
 262          *      and referenced later by their name, which is the
 263          *      name2 from the config section, or name1 if there was
 264          *      no name2.
 265          */
 266         cs = cf_section_sub_find_name2(modules, NULL, instname);
 267         if (cs == NULL) {
 268                 radlog(L_ERR|L_CONS, "ERROR: Cannot find a configuration entry for module \"%s\".\n", instname);
 269                 return NULL;
 270         }
 271
 272         /*
 273          *      If there's already a module instance, return it.
 274          */
 275         node = cf_data_find(cs, "instance");
 276         if (node) return node;
 277
 278         name1 = cf_section_name1(cs);
 279         name2 = cf_section_name2(cs);
 280
 281         /*
 282          *      Found the configuration entry.
 283          */
 284         node = rad_malloc(sizeof(*node));
 285         memset(node, 0, sizeof(*node));
 286
 287         node->insthandle = NULL;
 288
 289         /*
 290          *      Names in the "modules" section aren't prefixed
 291          *      with "rlm_", so we add it here.
 292          */
 293         snprintf(module_name, sizeof(module_name), "rlm_%s", name1);
 294
 295         node->entry = linkto_module(module_name,
 296                                     mainconfig.radiusd_conf,
 297                                     cf_section_lineno(cs));
 298         if (!node->entry) {
 299                 free(node);
 300                 /* linkto_module logs any errors */
 301                 return NULL;
 302         }
 303
 304         DEBUG2(" Module: Instantiating %s", instname);
 305
 306         /*
 307          *      Call the module's instantiation routine.
 308          */
 309         if ((node->entry->module->instantiate) &&
 310             ((node->entry->module->instantiate)(cs, &node->insthandle) < 0)) {
 311                 radlog(L_ERR|L_CONS,
 312                                 "%s[%d]: %s: Module instantiation failed.\n",
 313                        mainconfig.radiusd_conf, cf_section_lineno(cs),
 314                        instname);
 315                 free(node);
 316                 return NULL;
 317         }
 318
 319         /*
 320          *      We're done.  Fill in the rest of the data structure,
 321          *      and link it to the module instance list.
 322          */
 323         strlcpy(node->name, instname, sizeof(node->name));
 324
 325 #ifdef HAVE_PTHREAD_H
 326         /*
 327          *      If we're threaded, check if the module is thread-safe.
 328          *
 329          *      If it isn't, we create a mutex.
 330          */
 331         if ((node->entry->module->type & RLM_TYPE_THREAD_UNSAFE) != 0) {
 332                 node->mutex = (pthread_mutex_t *) rad_malloc(sizeof(pthread_mutex_t));
 333                 /*
 334                  *      Initialize the mutex.
 335                  */
 336                 pthread_mutex_init(node->mutex, NULL);
 337         } else {
 338                 /*
 339                  *      The module is thread-safe.  Don't give it a mutex.
 340                  */
 341                 node->mutex = NULL;
 342         }
 343
 344 #endif
 345         cf_data_add(cs, "instance", node, module_instance_free);
 346
 347         return node;
 348 }
 349
 350 static indexed_modcallable *lookup_by_index(int comp, int idx)
 351 {
 352         indexed_modcallable myc;
 353
 354         myc.comp = comp;
 355         myc.idx = idx;
 356
 357         return rbtree_finddata(components, &myc);
 358 }
 359
 360 /*
 361  *      Create a new sublist.
 362  */
 363 static indexed_modcallable *new_sublist(int comp, int idx)
 364 {
 365         indexed_modcallable *c;
 366
 367         c = lookup_by_index(comp, idx);
 368
 369         /* It is an error to try to create a sublist that already
 370          * exists. It would almost certainly be caused by accidental
 371          * duplication in the config file.
 372          *
 373          * index 0 is the exception, because it is used when we want
 374          * to collect _all_ listed modules under a single index by
 375          * default, which is currently the case in all components
 376          * except authenticate. */
 377         if (c) {
 378                 if (idx == 0) {
 379                         return c;
 380                 }
 381                 return NULL;
 382         }
 383
 384         c = rad_malloc(sizeof(*c));
 385         c->modulelist = NULL;
 386         c->comp = comp;
 387         c->idx = idx;
 388
 389         if (!rbtree_insert(components, c)) {
 390                 free(c);
 391                 return NULL;
 392         }
 393
 394         return c;
 395 }
 396
 397 static int indexed_modcall(int comp, int idx, REQUEST *request)
 398 {
 399         int rcode;
 400         indexed_modcallable *this;
 401
 402         this = lookup_by_index(comp, idx);
 403         if (!this) {
 404                 if (idx != 0) DEBUG2("  ERROR: Unknown value specified for %s.  Cannot perform requested action.",
 405                                      section_type_value[comp].typename);
 406                 request->component = section_type_value[comp].typename;
 407                 rcode = modcall(comp, NULL, request); /* does default action */
 408         } else {
 409                 DEBUG2("  Processing the %s section of %s",
 410                        section_type_value[comp].section,
 411                        mainconfig.radiusd_conf);
 412                 request->component = section_type_value[comp].typename;
 413                 rcode = modcall(comp, this->modulelist, request);
 414         }
 415         request->module = "<server-core>";
 416         request->component = "<server-core>";
 417         return rcode;
 418 }
 419
 420 /*
 421  *      Load a sub-module list, as found inside an Auth-Type foo {}
 422  *      block
 423  */
 424 static int load_subcomponent_section(modcallable *parent,
 425                                      CONF_SECTION *cs, int comp,
 426                                      const char *filename)
 427 {
 428         indexed_modcallable *subcomp;
 429         modcallable *ml;
 430         DICT_VALUE *dval;
 431         const char *name2 = cf_section_name2(cs);
 432
 433         rad_assert(comp >= RLM_COMPONENT_AUTH);
 434         rad_assert(comp <= RLM_COMPONENT_COUNT);
 435
 436         /*
 437          *      Sanity check.
 438          */
 439         if (!name2) {
 440                 radlog(L_ERR|L_CONS,
 441                        "%s[%d]: No name specified for %s block",
 442                        filename, cf_section_lineno(cs),
 443                        section_type_value[comp].typename);
 444                 return 1;
 445         }
 446
 447         /*
 448          *      Compile the group.
 449          */
 450         ml = compile_modgroup(parent, comp, cs, filename);
 451         if (!ml) {
 452                 return 0;
 453         }
 454
 455         /*
 456          *      We must assign a numeric index to this subcomponent.
 457          *      It is generated and placed in the dictionary by
 458          *      setup_modules(), when it loads the sections.  If it
 459          *      isn't found, it's a serious error.
 460          */
 461         dval = dict_valbyname(section_type_value[comp].attr, name2);
 462         if (!dval) {
 463                 radlog(L_ERR|L_CONS,
 464                        "%s[%d] %s %s Not previously configured",
 465                        filename, cf_section_lineno(cs),
 466                        section_type_value[comp].typename, name2);
 467                 modcallable_free(&ml);
 468                 return 0;
 469         }
 470
 471         subcomp = new_sublist(comp, dval->value);
 472         if (!subcomp) {
 473                 radlog(L_ERR|L_CONS,
 474                        "%s[%d] %s %s already configured - skipping",
 475                        filename, cf_section_lineno(cs),
 476                        section_type_value[comp].typename, name2);
 477                 modcallable_free(&ml);
 478                 return 1;
 479         }
 480
 481         subcomp->modulelist = ml;
 482         return 1;               /* OK */
 483 }
 484
 485 static int load_component_section(modcallable *parent,
 486                                   CONF_SECTION *cs, int comp,
 487                                   const char *filename)
 488 {
 489         modcallable *this;
 490         CONF_ITEM *modref;
 491         int idx;
 492         indexed_modcallable *subcomp;
 493         const char *modname;
 494         const char *visiblename;
 495
 496         /*
 497          *      Loop over the entries in the named section.
 498          */
 499         for (modref = cf_item_find_next(cs, NULL);
 500              modref != NULL;
 501              modref = cf_item_find_next(cs, modref)) {
 502                 CONF_PAIR *cp = NULL;
 503                 CONF_SECTION *scs = NULL;
 504
 505                 /*
 506                  *      Look for Auth-Type foo {}, which are special
 507                  *      cases of named sections, and allowable ONLY
 508                  *      at the top-level.
 509                  *
 510                  *      i.e. They're not allowed in a "group" or "redundant"
 511                  *      subsection.
 512                  */
 513                 if (cf_item_is_section(modref)) {
 514                         const char *sec_name;
 515                         scs = cf_itemtosection(modref);
 516
 517                         sec_name = cf_section_name1(scs);
 518
 519                         if (strcmp(sec_name,
 520                                    section_type_value[comp].typename) == 0) {
 521                                 if (!load_subcomponent_section(parent, scs,
 522                                                                comp,
 523                                                                filename)) {
 524                                         return -1; /* FIXME: memleak? */
 525                                 }
 526                                 continue;
 527                         }
 528
 529                         /*
 530                          *      Allow old names, too.
 531                          */
 532                         if (strcmp(sec_name,
 533                                    old_section_type_value[comp].typename) == 0) {
 534                                 if (!load_subcomponent_section(parent, scs,
 535                                                                comp,
 536                                                                filename)) {
 537                                         return -1; /* FIXME: memleak? */
 538                                 }
 539                                 continue;
 540                         }
 541                         cp = NULL;
 542                 } else if (cf_item_is_pair(modref)) {
 543                         cp = cf_itemtopair(modref);
 544                 } else {
 545                         continue; /* ignore it */
 546                 }
 547
 548                 /*
 549                  *      Try to compile one entry.
 550                  */
 551                 this = compile_modsingle(parent, comp, modref, filename,
 552                                          &modname);
 553                 if (!this) {
 554                         radlog(L_ERR|L_CONS,
 555                                "%s[%d] Failed to parse %s section.\n",
 556                                filename, cf_section_lineno(cs),
 557                                cf_section_name1(cs));
 558                         return -1;
 559                 }
 560
 561                 if (comp == RLM_COMPONENT_AUTH) {
 562                         DICT_VALUE *dval;
 563                         const char *modrefname = NULL;
 564                         int lineno = 0;
 565
 566                         if (cp) {
 567                                 modrefname = cf_pair_attr(cp);
 568                                 lineno = cf_pair_lineno(cp);
 569                         } else {
 570                                 modrefname = cf_section_name2(scs);
 571                                 lineno = cf_section_lineno(scs);
 572                                 if (!modrefname) {
 573                                         radlog(L_ERR|L_CONS,
 574                                                "%s[%d] Failed to parse %s sub-section.\n",
 575                                                filename, lineno,
 576                                                cf_section_name1(scs));
 577                                         return -1;
 578                                 }
 579                         }
 580
 581                         dval = dict_valbyname(PW_AUTH_TYPE, modrefname);
 582                         if (!dval) {
 583                                 /*
 584                                  *      It's a section, but nothing we
 585                                  *      recognize.  Die!
 586                                  */
 587                                 radlog(L_ERR|L_CONS, "%s[%d] Unknown Auth-Type \"%s\" in %s sub-section.",
 588                                        filename, lineno,
 589                                        modrefname, section_type_value[comp].section);
 590                                 return -1;
 591                         }
 592                         idx = dval->value;
 593                 } else {
 594                         /* See the comment in new_sublist() for explanation
 595                          * of the special index 0 */
 596                         idx = 0;
 597                 }
 598
 599                 subcomp = new_sublist(comp, idx);
 600                 if (subcomp == NULL) {
 601                         radlog(L_INFO|L_CONS,
 602                                         "%s %s %s already configured - skipping",
 603                                         filename, section_type_value[comp].typename,
 604                                         modname);
 605                         modcallable_free(&this);
 606                         continue;
 607                 }
 608
 609                 /* If subcomp->modulelist is NULL, add_to_modcallable will
 610                  * create it */
 611                 visiblename = cf_section_name2(cs);
 612                 if (visiblename == NULL)
 613                         visiblename = cf_section_name1(cs);
 614                 add_to_modcallable(&subcomp->modulelist, this,
 615                                    comp, visiblename);
 616         }
 617
 618         return 0;
 619 }
 620
 621
 622 /*
 623  *      Parse the module config sections, and load
 624  *      and call each module's init() function.
 625  *
 626  *      Libtool makes your life a LOT easier, especially with libltdl.
 627  *      see: http://www.gnu.org/software/libtool/
 628  */
 629 int setup_modules(int reload)
 630 {
 631         int             comp;
 632         CONF_SECTION    *cs, *modules;
 633         int             do_component[RLM_COMPONENT_COUNT];
 634         rad_listen_t    *listener;
 635
 636         /*
 637          *      If necessary, initialize libltdl.
 638          */
 639         if (!reload) {
 640                 /*
 641                  *      Set the default list of preloaded symbols.
 642                  *      This is used to initialize libltdl's list of
 643                  *      preloaded modules.
 644                  *
 645                  *      i.e. Static modules.
 646                  */
 647                 LTDL_SET_PRELOADED_SYMBOLS();
 648
 649                 if (lt_dlinit() != 0) {
 650                         radlog(L_ERR|L_CONS, "Failed to initialize libraries: %s\n",
 651                                         lt_dlerror());
 652                         return -1;
 653                 }
 654
 655                 /*
 656                  *      Set the search path to ONLY our library directory.
 657                  *      This prevents the modules from being found from
 658                  *      any location on the disk.
 659                  */
 660                 lt_dlsetsearchpath(radlib_dir);
 661
 662                 DEBUG2("radiusd: Library search path is %s",
 663                        lt_dlgetsearchpath());
 664
 665                 /*
 666                  *      Set up the internal module struct.
 667                  */
 668                 module_tree = rbtree_create(module_entry_cmp,
 669                                             module_entry_free, 0);
 670                 if (!module_tree) {
 671                         radlog(L_ERR|L_CONS, "Failed to initialize modules\n");
 672                         return -1;
 673                 }
 674         } else {
 675                 rbtree_free(components);
 676         }
 677
 678         components = rbtree_create(indexed_modcallable_cmp,
 679                                    indexed_modcallable_free, 0);
 680         if (!components) {
 681                 radlog(L_ERR|L_CONS, "Failed to initialize components\n");
 682                 return -1;
 683         }
 684
 685         /*
 686          *      Figure out which sections to load.
 687          */
 688         memset(do_component, 0, sizeof(do_component));
 689         for (listener = mainconfig.listen;
 690              listener != NULL;
 691              listener = listener->next) {
 692                 switch (listener->type) {
 693                 case RAD_LISTEN_AUTH:
 694                         do_component[RLM_COMPONENT_AUTZ] = 1;
 695                         do_component[RLM_COMPONENT_AUTH] = 1;
 696                         do_component[RLM_COMPONENT_POST_AUTH] = 1;
 697                         do_component[RLM_COMPONENT_SESS] = 1;
 698                         break;
 699
 700                 case RAD_LISTEN_DETAIL: /* just like acct */
 701                 case RAD_LISTEN_ACCT:
 702                         do_component[RLM_COMPONENT_PREACCT] = 1;
 703                         do_component[RLM_COMPONENT_ACCT] = 1;
 704                         break;
 705
 706                 case RAD_LISTEN_PROXY:
 707                         do_component[RLM_COMPONENT_PRE_PROXY] = 1;
 708                         do_component[RLM_COMPONENT_POST_PROXY] = 1;
 709                         break;
 710
 711                 case RAD_LISTEN_VQP:
 712                         do_component[RLM_COMPONENT_POST_AUTH] = 1;
 713                         break;
 714                         /*
 715                          *      Ignore this.
 716                          */
 717                 case RAD_LISTEN_SNMP:
 718                         break;
 719
 720                 default:
 721                         rad_assert(0 == 1);
 722                         break;
 723                 }
 724         }
 725
 726         for (comp = RLM_COMPONENT_AUTH; comp < RLM_COMPONENT_COUNT; comp++) {
 727                 /*
 728                  *      Have the debugging messages all in one place.
 729                  */
 730                 if (!do_component[comp]) {
 731                         DEBUG2("modules: Not loading %s{} section",
 732                                section_type_value[comp].section);
 733                 }
 734         }
 735
 736         /*
 737          *      Create any DICT_VALUE's for the types.  See
 738          *      'doc/configurable_failover' for examples of 'authtype'
 739          *      used to create new Auth-Type values.  In order to
 740          *      let the user create new names, we've got to look for
 741          *      those names, and create DICT_VALUE's for them.
 742          */
 743         for (comp = RLM_COMPONENT_AUTH; comp < RLM_COMPONENT_COUNT; comp++) {
 744                 int             value;
 745                 const char      *name2;
 746                 DICT_ATTR       *dattr;
 747                 DICT_VALUE      *dval;
 748                 CONF_SECTION    *sub, *next;
 749                 CONF_PAIR       *cp;
 750
 751                 /*
 752                  *      Not needed, don't load it.
 753                  */
 754                 if (!do_component[comp]) {
 755                         continue;
 756                 }
 757                 cs = cf_section_find(section_type_value[comp].section);
 758
 759                 if (!cs) continue;
 760
 761                 sub = NULL;
 762                 do {
 763                         /*
 764                          *      See if there's a sub-section by that
 765                          *      name.
 766                          */
 767                         next = cf_subsection_find_next(cs, sub,
 768                                                        section_type_value[comp].typename);
 769
 770                         /*
 771                          *      Allow some old names, too.
 772                          */
 773                         if (!next && (comp <= 4)) {
 774                                 next = cf_subsection_find_next(cs, sub,
 775                                                                old_section_type_value[comp].typename);
 776                         }
 777                         sub = next;
 778
 779                         /*
 780                          *      If so, look for it to define a new
 781                          *      value.
 782                          */
 783                         name2 = cf_section_name2(sub);
 784                         if (!name2) continue;
 785
 786
 787                         /*
 788                          *      If the value already exists, don't
 789                          *      create it again.
 790                          */
 791                         dval = dict_valbyname(section_type_value[comp].attr,
 792                                               name2);
 793                         if (dval) continue;
 794
 795                         /*
 796                          *      Find the attribute for the value.
 797                          */
 798                         dattr = dict_attrbyvalue(section_type_value[comp].attr);
 799                         if (!dattr) {
 800                                 radlog(L_ERR, "%s[%d]: No such attribute %s",
 801                                        mainconfig.radiusd_conf,
 802                                        cf_section_lineno(sub),
 803                                        section_type_value[comp].typename);
 804                                 continue;
 805                         }
 806
 807                         /*
 808                          *      Create a new unique value with a
 809                          *      meaningless number.  You can't look at
 810                          *      it from outside of this code, so it
 811                          *      doesn't matter.  The only requirement
 812                          *      is that it's unique.
 813                          */
 814                         do {
 815                                 value = lrad_rand() & 0x00ffffff;
 816                         } while (dict_valbyattr(dattr->attr, value));
 817
 818                         if (dict_addvalue(name2, dattr->name, value) < 0) {
 819                                 radlog(L_ERR, "%s", librad_errstr);
 820                                 return -1;
 821                         }
 822                 } while (sub != NULL);
 823
 824                 /*
 825                  *      Loop over the non-sub-sections, too.
 826                  */
 827                 cp = NULL;
 828                 do {
 829                         /*
 830                          *      See if there's a conf-pair by that
 831                          *      name.
 832                          */
 833                         cp = cf_pair_find_next(cs, cp, NULL);
 834                         if (!cp) break;
 835
 836
 837                         /*
 838                          *      If the value already exists, don't
 839                          *      create it again.
 840                          */
 841                         name2 = cf_pair_attr(cp);
 842                         dval = dict_valbyname(section_type_value[comp].attr,
 843                                               name2);
 844                         if (dval) continue;
 845
 846                         /*
 847                          *      Find the attribute for the value.
 848                          */
 849                         dattr = dict_attrbyvalue(section_type_value[comp].attr);
 850                         if (!dattr) {
 851                                 radlog(L_ERR, "%s[%d]: No such attribute %s",
 852                                        mainconfig.radiusd_conf,
 853                                        cf_section_lineno(sub),
 854                                        section_type_value[comp].typename);
 855                                 continue;
 856                         }
 857
 858                         /*
 859                          *      Finally, create the new attribute.
 860                          */
 861                         do {
 862                                 value = lrad_rand() & 0x00ffffff;
 863                         } while (dict_valbyattr(dattr->attr, value));
 864                         if (dict_addvalue(name2, dattr->name, value) < 0) {
 865                                 radlog(L_ERR, "%s", librad_errstr);
 866                                 return -1;
 867                         }
 868                 } while (cp != NULL);
 869         } /* over the sections which can have redundent sub-sections */
 870
 871         /*
 872          *      Remember where the modules were stored.
 873          */
 874         modules = cf_section_find("modules");
 875         if (!modules) {
 876                 radlog(L_ERR, "Cannot find a \"modules\" section in the configuration file!");
 877                 return -1;
 878         }
 879
 880         /*
 881          *  Look for the 'instantiate' section, which tells us
 882          *  the instantiation order of the modules, and also allows
 883          *  us to load modules with no authorize/authenticate/etc.
 884          *  sections.
 885          */
 886         cs = cf_section_find("instantiate");
 887         if (cs != NULL) {
 888                 CONF_ITEM *ci;
 889                 CONF_PAIR *cp;
 890                 module_instance_t *module;
 891                 const char *name;
 892
 893                 DEBUG2(" instantiate {");
 894
 895                 /*
 896                  *  Loop over the items in the 'instantiate' section.
 897                  */
 898                 for (ci=cf_item_find_next(cs, NULL);
 899                      ci != NULL;
 900                      ci=cf_item_find_next(cs, ci)) {
 901
 902                         /*
 903                          *      Skip sections.  They'll be handled
 904                          *      later, if they're referenced at all...
 905                          */
 906                         if (cf_item_is_section(ci)) {
 907                                 continue;
 908                         }
 909
 910                         cp = cf_itemtopair(ci);
 911                         name = cf_pair_attr(cp);
 912                         module = find_module_instance(modules, name);
 913                         if (!module) {
 914                                 return -1;
 915                         }
 916                 } /* loop over items in the subsection */
 917
 918                 DEBUG2(" }");
 919         } /* if there's an 'instantiate' section. */
 920
 921         DEBUG2(" modules {");
 922
 923         /*
 924          *      Loop over all of the known components, finding their
 925          *      configuration section, and loading it.
 926          */
 927         for (comp = 0; comp < RLM_COMPONENT_COUNT; ++comp) {
 928                 cs = cf_section_find(section_type_value[comp].section);
 929                 if (cs == NULL)
 930                         continue;
 931
 932                 if (!do_component[comp]) {
 933                         continue;
 934                 }
 935
 936                 if (cf_item_find_next(cs, NULL) == NULL) {
 937                         continue; /* section is empty */
 938                 }
 939
 940                 DEBUG2(" Module: Checking %s {...} for more modules to load",
 941                        section_type_value[comp].section);
 942
 943                 if (load_component_section(NULL, cs, comp, mainconfig.radiusd_conf) < 0) {
 944                         return -1;
 945                 }
 946         }
 947
 948         DEBUG2(" }");
 949
 950         return 0;
 951 }
 952
 953 /*
 954  *      Call all authorization modules until one returns
 955  *      somethings else than RLM_MODULE_OK
 956  */
 957 int module_authorize(int autz_type, REQUEST *request)
 958 {
 959         return indexed_modcall(RLM_COMPONENT_AUTZ, autz_type, request);
 960 }
 961
 962 /*
 963  *      Authenticate a user/password with various methods.
 964  */
 965 int module_authenticate(int auth_type, REQUEST *request)
 966 {
 967         return indexed_modcall(RLM_COMPONENT_AUTH, auth_type, request);
 968 }
 969
 970 /*
 971  *      Do pre-accounting for ALL configured sessions
 972  */
 973 int module_preacct(REQUEST *request)
 974 {
 975         return indexed_modcall(RLM_COMPONENT_PREACCT, 0, request);
 976 }
 977
 978 /*
 979  *      Do accounting for ALL configured sessions
 980  */
 981 int module_accounting(int acct_type, REQUEST *request)
 982 {
 983         return indexed_modcall(RLM_COMPONENT_ACCT, acct_type, request);
 984 }
 985
 986 /*
 987  *      See if a user is already logged in.
 988  *
 989  *      Returns: 0 == OK, 1 == double logins, 2 == multilink attempt
 990  */
 991 int module_checksimul(int sess_type, REQUEST *request, int maxsimul)
 992 {
 993         int rcode;
 994
 995         if(!request->username)
 996                 return 0;
 997
 998         request->simul_count = 0;
 999         request->simul_max = maxsimul;
1000         request->simul_mpp = 1;
1001
1002         rcode = indexed_modcall(RLM_COMPONENT_SESS, sess_type, request);
1003
1004         if (rcode != RLM_MODULE_OK) {
1005                 /* FIXME: Good spot for a *rate-limited* warning to the log */
1006                 return 0;
1007         }
1008
1009         return (request->simul_count < maxsimul) ? 0 : request->simul_mpp;
1010 }
1011
1012 /*
1013  *      Do pre-proxying for ALL configured sessions
1014  */
1015 int module_pre_proxy(int type, REQUEST *request)
1016 {
1017         return indexed_modcall(RLM_COMPONENT_PRE_PROXY, type, request);
1018 }
1019
1020 /*
1021  *      Do post-proxying for ALL configured sessions
1022  */
1023 int module_post_proxy(int type, REQUEST *request)
1024 {
1025         return indexed_modcall(RLM_COMPONENT_POST_PROXY, type, request);
1026 }
1027
1028 /*
1029  *      Do post-authentication for ALL configured sessions
1030  */
1031 int module_post_auth(int postauth_type, REQUEST *request)
1032 {
1033         return indexed_modcall(RLM_COMPONENT_POST_AUTH, postauth_type, request);
1034 }
1035