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 #define VMPS_SPACE "vmps"
  34
  35 typedef struct indexed_modcallable {
  36         const           char *space;
  37         int             comp;
  38         int             idx;
  39         modcallable     *modulelist;
  40 } indexed_modcallable;
  41
  42 /*
  43  *      For each component, keep an ordered list of ones to call.
  44  */
  45 static rbtree_t *components;
  46
  47 static rbtree_t *module_tree = NULL;
  48
  49 typedef struct section_type_value_t {
  50         const char      *section;
  51         const char      *typename;
  52         int             attr;
  53 } section_type_value_t;
  54
  55
  56 /*
  57  *      Ordered by component
  58  */
  59 static const section_type_value_t section_type_value[RLM_COMPONENT_COUNT] = {
  60         { "authenticate", "Auth-Type",       PW_AUTH_TYPE },
  61         { "authorize",    "Autz-Type",       PW_AUTZ_TYPE },
  62         { "preacct",      "Pre-Acct-Type",   PW_PRE_ACCT_TYPE },
  63         { "accounting",   "Acct-Type",       PW_ACCT_TYPE },
  64         { "session",      "Session-Type",    PW_SESSION_TYPE },
  65         { "pre-proxy",    "Pre-Proxy-Type",  PW_PRE_PROXY_TYPE },
  66         { "post-proxy",   "Post-Proxy-Type", PW_POST_PROXY_TYPE },
  67         { "post-auth",    "Post-Auth-Type",  PW_POST_AUTH_TYPE },
  68 };
  69
  70 static void indexed_modcallable_free(void *data)
  71 {
  72         indexed_modcallable *c = data;
  73
  74         modcallable_free(&c->modulelist);
  75         free(c);
  76 }
  77
  78 static int indexed_modcallable_cmp(const void *one, const void *two)
  79 {
  80         int rcode;
  81         const indexed_modcallable *a = one;
  82         const indexed_modcallable *b = two;
  83
  84         rcode = strcmp(a->space, b->space);
  85         if (rcode != 0) return rcode;
  86
  87         if (a->comp < b->comp) return -1;
  88         if (a->comp >  b->comp) return +1;
  89
  90         return a->idx - b->idx;
  91 }
  92
  93
  94 /*
  95  *      Free a module instance.
  96  */
  97 static void module_instance_free(void *data)
  98 {
  99         module_instance_t *this = data;
 100
 101         if (this->entry->module->detach)
 102                 (this->entry->module->detach)(this->insthandle);
 103 #ifdef HAVE_PTHREAD_H
 104         if (this->mutex) {
 105                 /*
 106                  *      FIXME
 107                  *      The mutex MIGHT be locked...
 108                  *      we'll check for that later, I guess.
 109                  */
 110                 pthread_mutex_destroy(this->mutex);
 111                 free(this->mutex);
 112         }
 113 #endif
 114         free(this);
 115 }
 116
 117
 118 /*
 119  *      Compare two module entries
 120  */
 121 static int module_entry_cmp(const void *one, const void *two)
 122 {
 123         const module_entry_t *a = one;
 124         const module_entry_t *b = two;
 125
 126         return strcmp(a->name, b->name);
 127 }
 128
 129 /*
 130  *      Free a module entry.
 131  */
 132 static void module_entry_free(void *data)
 133 {
 134         module_entry_t *this = data;
 135
 136         lt_dlclose(this->handle);       /* ignore any errors */
 137         free(this);
 138 }
 139
 140
 141 /*
 142  *      Remove the module lists.
 143  */
 144 int detach_modules(void)
 145 {
 146         rbtree_free(components);
 147         rbtree_free(module_tree);
 148
 149         return 0;
 150 }
 151
 152
 153 /*
 154  *      Find a module on disk or in memory, and link to it.
 155  */
 156 static module_entry_t *linkto_module(const char *module_name,
 157                                      const char *cffilename, int cflineno)
 158 {
 159         module_entry_t myentry;
 160         module_entry_t *node;
 161         lt_dlhandle handle;
 162         char module_struct[256];
 163         char *p;
 164         const void *module;
 165
 166         strlcpy(myentry.name, module_name, sizeof(myentry.name));
 167         node = rbtree_finddata(module_tree, &myentry);
 168         if (node) return node;
 169
 170         /*
 171          *      Keep the handle around so we can dlclose() it.
 172          */
 173         handle = lt_dlopenext(module_name);
 174         if (handle == NULL) {
 175                 radlog(L_ERR|L_CONS, "%s[%d] Failed to link to module '%s':"
 176                        " %s\n", cffilename, cflineno, module_name, lt_dlerror());
 177                 return NULL;
 178         }
 179
 180         /*
 181          *      Link to the module's rlm_FOO{} module structure.
 182          *
 183          *      The module_name variable has the version number
 184          *      embedded in it, and we don't want that here.
 185          */
 186         strcpy(module_struct, module_name);
 187         p = strrchr(module_struct, '-');
 188         if (p) *p = '\0';
 189
 190         DEBUG3("    (Loaded %s, checking if it's valid)", module_name);
 191
 192         /*
 193          *      libltld MAY core here, if the handle it gives us contains
 194          *      garbage data.
 195          */
 196         module = lt_dlsym(handle, module_struct);
 197         if (!module) {
 198                 radlog(L_ERR|L_CONS, "%s[%d] Failed linking to "
 199                                 "%s structure in %s: %s\n",
 200                                 cffilename, cflineno,
 201                                 module_name, cffilename, lt_dlerror());
 202                 lt_dlclose(handle);
 203                 return NULL;
 204         }
 205         /*
 206          *      Before doing anything else, check if it's sane.
 207          */
 208         if ((*(const uint32_t *) module) != RLM_MODULE_MAGIC_NUMBER) {
 209                 lt_dlclose(handle);
 210                 radlog(L_ERR|L_CONS, "%s[%d] Invalid version in module '%s'",
 211                        cffilename, cflineno, module_name);
 212                 return NULL;
 213
 214         }
 215
 216         /* make room for the module type */
 217         node = rad_malloc(sizeof(*node));
 218         memset(node, 0, sizeof(*node));
 219         strlcpy(node->name, module_name, sizeof(node->name));
 220         node->module = module;
 221         node->handle = handle;
 222
 223         DEBUG(" Module: Linked to module %s", module_name);
 224
 225         /*
 226          *      Add the module as "rlm_foo-version" to the configuration
 227          *      section.
 228          */
 229         if (!rbtree_insert(module_tree, node)) {
 230                 radlog(L_ERR, "Failed to cache module %s", module_name);
 231                 lt_dlclose(handle);
 232                 free(node);
 233                 return NULL;
 234         }
 235
 236         return node;
 237 }
 238
 239 /*
 240  *      Find a module instance.
 241  */
 242 module_instance_t *find_module_instance(CONF_SECTION *modules,
 243                                         const char *instname)
 244 {
 245         CONF_SECTION *cs;
 246         const char *name1, *name2;
 247         module_instance_t *node;
 248         char module_name[256];
 249
 250         if (!modules) return NULL;
 251
 252         /*
 253          *      Module instances are declared in the modules{} block
 254          *      and referenced later by their name, which is the
 255          *      name2 from the config section, or name1 if there was
 256          *      no name2.
 257          */
 258         cs = cf_section_sub_find_name2(modules, NULL, instname);
 259         if (cs == NULL) {
 260                 radlog(L_ERR|L_CONS, "ERROR: Cannot find a configuration entry for module \"%s\".\n", instname);
 261                 return NULL;
 262         }
 263
 264         /*
 265          *      If there's already a module instance, return it.
 266          */
 267         node = cf_data_find(cs, "instance");
 268         if (node) return node;
 269
 270         name1 = cf_section_name1(cs);
 271         name2 = cf_section_name2(cs);
 272
 273         /*
 274          *      Found the configuration entry.
 275          */
 276         node = rad_malloc(sizeof(*node));
 277         memset(node, 0, sizeof(*node));
 278
 279         node->insthandle = NULL;
 280
 281         /*
 282          *      Names in the "modules" section aren't prefixed
 283          *      with "rlm_", so we add it here.
 284          */
 285         snprintf(module_name, sizeof(module_name), "rlm_%s", name1);
 286
 287         node->entry = linkto_module(module_name,
 288                                     mainconfig.radiusd_conf,
 289                                     cf_section_lineno(cs));
 290         if (!node->entry) {
 291                 free(node);
 292                 /* linkto_module logs any errors */
 293                 return NULL;
 294         }
 295
 296         DEBUG2(" Module: Instantiating %s", instname);
 297
 298         /*
 299          *      Call the module's instantiation routine.
 300          */
 301         if ((node->entry->module->instantiate) &&
 302             ((node->entry->module->instantiate)(cs, &node->insthandle) < 0)) {
 303                 radlog(L_ERR|L_CONS,
 304                                 "%s[%d]: %s: Module instantiation failed.\n",
 305                        mainconfig.radiusd_conf, cf_section_lineno(cs),
 306                        instname);
 307                 free(node);
 308                 return NULL;
 309         }
 310
 311         /*
 312          *      We're done.  Fill in the rest of the data structure,
 313          *      and link it to the module instance list.
 314          */
 315         strlcpy(node->name, instname, sizeof(node->name));
 316
 317 #ifdef HAVE_PTHREAD_H
 318         /*
 319          *      If we're threaded, check if the module is thread-safe.
 320          *
 321          *      If it isn't, we create a mutex.
 322          */
 323         if ((node->entry->module->type & RLM_TYPE_THREAD_UNSAFE) != 0) {
 324                 node->mutex = (pthread_mutex_t *) rad_malloc(sizeof(pthread_mutex_t));
 325                 /*
 326                  *      Initialize the mutex.
 327                  */
 328                 pthread_mutex_init(node->mutex, NULL);
 329         } else {
 330                 /*
 331                  *      The module is thread-safe.  Don't give it a mutex.
 332                  */
 333                 node->mutex = NULL;
 334         }
 335
 336 #endif
 337         cf_data_add(cs, "instance", node, module_instance_free);
 338
 339         return node;
 340 }
 341
 342 static indexed_modcallable *lookup_by_index(const char *space, int comp,
 343                                             int idx)
 344 {
 345         indexed_modcallable myc;
 346
 347         myc.comp = comp;
 348         myc.idx = idx;
 349         myc.space = space;
 350
 351         return rbtree_finddata(components, &myc);
 352 }
 353
 354 /*
 355  *      Create a new sublist.
 356  */
 357 static indexed_modcallable *new_sublist(const char *space, int comp, int idx)
 358 {
 359         indexed_modcallable *c;
 360
 361         c = lookup_by_index(space, comp, idx);
 362
 363         /* It is an error to try to create a sublist that already
 364          * exists. It would almost certainly be caused by accidental
 365          * duplication in the config file.
 366          *
 367          * index 0 is the exception, because it is used when we want
 368          * to collect _all_ listed modules under a single index by
 369          * default, which is currently the case in all components
 370          * except authenticate. */
 371         if (c) {
 372                 if (idx == 0) {
 373                         return c;
 374                 }
 375                 return NULL;
 376         }
 377
 378         c = rad_malloc(sizeof(*c));
 379         c->modulelist = NULL;
 380         c->space = space;
 381         c->comp = comp;
 382         c->idx = idx;
 383
 384         if (!rbtree_insert(components, c)) {
 385                 free(c);
 386                 return NULL;
 387         }
 388
 389         return c;
 390 }
 391
 392 static int indexed_modcall(const char *space, int comp, int idx,
 393                            REQUEST *request)
 394 {
 395         int rcode;
 396         indexed_modcallable *this;
 397
 398         this = lookup_by_index(space, comp, idx);
 399         if (!this) {
 400                 if (idx != 0) DEBUG2("  ERROR: Unknown value specified for %s.  Cannot perform requested action.",
 401                                      section_type_value[comp].typename);
 402                 request->component = section_type_value[comp].typename;
 403                 rcode = modcall(comp, NULL, request); /* does default action */
 404         } else {
 405                 if (!space) space = section_type_value[comp].section;
 406                 DEBUG2("  Processing the %s section of %s",
 407                        space, mainconfig.radiusd_conf);
 408                 request->component = section_type_value[comp].typename;
 409                 rcode = modcall(comp, this->modulelist, request);
 410         }
 411         request->module = "<server-core>";
 412         request->component = "<server-core>";
 413         return rcode;
 414 }
 415
 416 /*
 417  *      Load a sub-module list, as found inside an Auth-Type foo {}
 418  *      block
 419  */
 420 static int load_subcomponent_section(modcallable *parent, CONF_SECTION *cs,
 421                                      const char *space,
 422                                      int comp, const char *filename)
 423 {
 424         indexed_modcallable *subcomp;
 425         modcallable *ml;
 426         DICT_VALUE *dval;
 427         const char *name2 = cf_section_name2(cs);
 428
 429         rad_assert(comp >= RLM_COMPONENT_AUTH);
 430         rad_assert(comp <= RLM_COMPONENT_COUNT);
 431
 432         /*
 433          *      Sanity check.
 434          */
 435         if (!name2) {
 436                 radlog(L_ERR|L_CONS,
 437                        "%s[%d]: No name specified for %s block",
 438                        filename, cf_section_lineno(cs),
 439                        section_type_value[comp].typename);
 440                 return 1;
 441         }
 442
 443         /*
 444          *      Compile the group.
 445          */
 446         ml = compile_modgroup(parent, comp, cs, filename);
 447         if (!ml) {
 448                 return 0;
 449         }
 450
 451         /*
 452          *      We must assign a numeric index to this subcomponent.
 453          *      It is generated and placed in the dictionary by
 454          *      setup_modules(), when it loads the sections.  If it
 455          *      isn't found, it's a serious error.
 456          */
 457         dval = dict_valbyname(section_type_value[comp].attr, name2);
 458         if (!dval) {
 459                 radlog(L_ERR|L_CONS,
 460                        "%s[%d] %s %s Not previously configured",
 461                        filename, cf_section_lineno(cs),
 462                        section_type_value[comp].typename, name2);
 463                 modcallable_free(&ml);
 464                 return 0;
 465         }
 466
 467         subcomp = new_sublist(space, comp, dval->value);
 468         if (!subcomp) {
 469                 radlog(L_ERR|L_CONS,
 470                        "%s[%d] %s %s already configured - skipping",
 471                        filename, cf_section_lineno(cs),
 472                        section_type_value[comp].typename, name2);
 473                 modcallable_free(&ml);
 474                 return 1;
 475         }
 476
 477         subcomp->modulelist = ml;
 478         return 1;               /* OK */
 479 }
 480
 481 static int load_component_section(modcallable *parent, CONF_SECTION *cs,
 482                                   const char *space, int comp,
 483                                   const char *filename)
 484 {
 485         modcallable *this;
 486         CONF_ITEM *modref;
 487         int idx;
 488         indexed_modcallable *subcomp;
 489         const char *modname;
 490         const char *visiblename;
 491
 492         /*
 493          *      Loop over the entries in the named section.
 494          */
 495         for (modref = cf_item_find_next(cs, NULL);
 496              modref != NULL;
 497              modref = cf_item_find_next(cs, modref)) {
 498                 CONF_PAIR *cp = NULL;
 499                 CONF_SECTION *scs = NULL;
 500
 501                 /*
 502                  *      Look for Auth-Type foo {}, which are special
 503                  *      cases of named sections, and allowable ONLY
 504                  *      at the top-level.
 505                  *
 506                  *      i.e. They're not allowed in a "group" or "redundant"
 507                  *      subsection.
 508                  */
 509                 if (cf_item_is_section(modref)) {
 510                         const char *sec_name;
 511                         scs = cf_itemtosection(modref);
 512
 513                         sec_name = cf_section_name1(scs);
 514
 515                         if (strcmp(sec_name,
 516                                    section_type_value[comp].typename) == 0) {
 517                                 if (!load_subcomponent_section(parent, scs,
 518                                                                space, comp,
 519                                                                filename)) {
 520                                         return -1; /* FIXME: memleak? */
 521                                 }
 522                                 continue;
 523                         }
 524
 525                         cp = NULL;
 526                 } else if (cf_item_is_pair(modref)) {
 527                         cp = cf_itemtopair(modref);
 528                 } else {
 529                         continue; /* ignore it */
 530                 }
 531
 532                 /*
 533                  *      Try to compile one entry.
 534                  */
 535                 this = compile_modsingle(parent, comp, modref, filename,
 536                                          &modname);
 537                 if (!this) {
 538                         radlog(L_ERR|L_CONS,
 539                                "%s[%d] Failed to parse %s section.\n",
 540                                filename, cf_section_lineno(cs),
 541                                cf_section_name1(cs));
 542                         return -1;
 543                 }
 544
 545                 if (comp == RLM_COMPONENT_AUTH) {
 546                         DICT_VALUE *dval;
 547                         const char *modrefname = NULL;
 548                         int lineno = 0;
 549
 550                         if (cp) {
 551                                 modrefname = cf_pair_attr(cp);
 552                                 lineno = cf_pair_lineno(cp);
 553                         } else {
 554                                 modrefname = cf_section_name2(scs);
 555                                 lineno = cf_section_lineno(scs);
 556                                 if (!modrefname) {
 557                                         radlog(L_ERR|L_CONS,
 558                                                "%s[%d] Failed to parse %s sub-section.\n",
 559                                                filename, lineno,
 560                                                cf_section_name1(scs));
 561                                         return -1;
 562                                 }
 563                         }
 564
 565                         dval = dict_valbyname(PW_AUTH_TYPE, modrefname);
 566                         if (!dval) {
 567                                 /*
 568                                  *      It's a section, but nothing we
 569                                  *      recognize.  Die!
 570                                  */
 571                                 radlog(L_ERR|L_CONS, "%s[%d] Unknown Auth-Type \"%s\" in %s sub-section.",
 572                                        filename, lineno,
 573                                        modrefname, section_type_value[comp].section);
 574                                 return -1;
 575                         }
 576                         idx = dval->value;
 577                 } else {
 578                         /* See the comment in new_sublist() for explanation
 579                          * of the special index 0 */
 580                         idx = 0;
 581                 }
 582
 583                 subcomp = new_sublist(space, comp, idx);
 584                 if (subcomp == NULL) {
 585                         radlog(L_INFO|L_CONS,
 586                                         "%s %s %s already configured - skipping",
 587                                         filename, section_type_value[comp].typename,
 588                                         modname);
 589                         modcallable_free(&this);
 590                         continue;
 591                 }
 592
 593                 /* If subcomp->modulelist is NULL, add_to_modcallable will
 594                  * create it */
 595                 visiblename = cf_section_name2(cs);
 596                 if (visiblename == NULL)
 597                         visiblename = cf_section_name1(cs);
 598                 add_to_modcallable(&subcomp->modulelist, this,
 599                                    comp, visiblename);
 600         }
 601
 602         return 0;
 603 }
 604
 605
 606 /*
 607  *      Parse the module config sections, and load
 608  *      and call each module's init() function.
 609  *
 610  *      Libtool makes your life a LOT easier, especially with libltdl.
 611  *      see: http://www.gnu.org/software/libtool/
 612  */
 613 int setup_modules(int reload)
 614 {
 615         int             comp;
 616         CONF_SECTION    *cs, *modules;
 617         int             do_component[RLM_COMPONENT_COUNT];
 618         rad_listen_t    *listener;
 619
 620         /*
 621          *      If necessary, initialize libltdl.
 622          */
 623         if (!reload) {
 624                 /*
 625                  *      Set the default list of preloaded symbols.
 626                  *      This is used to initialize libltdl's list of
 627                  *      preloaded modules.
 628                  *
 629                  *      i.e. Static modules.
 630                  */
 631                 LTDL_SET_PRELOADED_SYMBOLS();
 632
 633                 if (lt_dlinit() != 0) {
 634                         radlog(L_ERR|L_CONS, "Failed to initialize libraries: %s\n",
 635                                         lt_dlerror());
 636                         return -1;
 637                 }
 638
 639                 /*
 640                  *      Set the search path to ONLY our library directory.
 641                  *      This prevents the modules from being found from
 642                  *      any location on the disk.
 643                  */
 644                 lt_dlsetsearchpath(radlib_dir);
 645
 646                 DEBUG2("radiusd: Library search path is %s",
 647                        lt_dlgetsearchpath());
 648
 649                 /*
 650                  *      Set up the internal module struct.
 651                  */
 652                 module_tree = rbtree_create(module_entry_cmp,
 653                                             module_entry_free, 0);
 654                 if (!module_tree) {
 655                         radlog(L_ERR|L_CONS, "Failed to initialize modules\n");
 656                         return -1;
 657                 }
 658         } else {
 659                 rbtree_free(components);
 660         }
 661
 662         components = rbtree_create(indexed_modcallable_cmp,
 663                                    indexed_modcallable_free, 0);
 664         if (!components) {
 665                 radlog(L_ERR|L_CONS, "Failed to initialize components\n");
 666                 return -1;
 667         }
 668
 669         /*
 670          *      Figure out which sections to load.
 671          */
 672         memset(do_component, 0, sizeof(do_component));
 673         for (listener = mainconfig.listen;
 674              listener != NULL;
 675              listener = listener->next) {
 676                 switch (listener->type) {
 677                 case RAD_LISTEN_AUTH:
 678                         do_component[RLM_COMPONENT_AUTZ] = 1;
 679                         do_component[RLM_COMPONENT_AUTH] = 1;
 680                         do_component[RLM_COMPONENT_POST_AUTH] = 1;
 681                         do_component[RLM_COMPONENT_SESS] = 1;
 682                         break;
 683
 684                 case RAD_LISTEN_DETAIL: /* just like acct */
 685                 case RAD_LISTEN_ACCT:
 686                         do_component[RLM_COMPONENT_PREACCT] = 1;
 687                         do_component[RLM_COMPONENT_ACCT] = 1;
 688                         break;
 689
 690                 case RAD_LISTEN_PROXY:
 691                         do_component[RLM_COMPONENT_PRE_PROXY] = 1;
 692                         do_component[RLM_COMPONENT_POST_PROXY] = 1;
 693                         break;
 694
 695                 case RAD_LISTEN_VQP:
 696                         do_component[RLM_COMPONENT_POST_AUTH] = 1;
 697                         break;
 698                         /*
 699                          *      Ignore this.
 700                          */
 701                 case RAD_LISTEN_SNMP:
 702                         break;
 703
 704                 default:
 705                         rad_assert(0 == 1);
 706                         break;
 707                 }
 708         }
 709
 710         for (comp = RLM_COMPONENT_AUTH; comp < RLM_COMPONENT_COUNT; comp++) {
 711                 /*
 712                  *      Have the debugging messages all in one place.
 713                  */
 714                 if (!do_component[comp]) {
 715                         DEBUG2("modules: Not loading %s{} section",
 716                                section_type_value[comp].section);
 717                 }
 718         }
 719
 720         /*
 721          *      Create any DICT_VALUE's for the types.  See
 722          *      'doc/configurable_failover' for examples of 'authtype'
 723          *      used to create new Auth-Type values.  In order to
 724          *      let the user create new names, we've got to look for
 725          *      those names, and create DICT_VALUE's for them.
 726          */
 727         for (comp = RLM_COMPONENT_AUTH; comp < RLM_COMPONENT_COUNT; comp++) {
 728                 int             value;
 729                 const char      *name2;
 730                 DICT_ATTR       *dattr;
 731                 DICT_VALUE      *dval;
 732                 CONF_SECTION    *sub, *next;
 733                 CONF_PAIR       *cp;
 734
 735                 /*
 736                  *      Not needed, don't load it.
 737                  */
 738                 if (!do_component[comp]) {
 739                         continue;
 740                 }
 741                 cs = cf_section_find(section_type_value[comp].section);
 742
 743                 if (!cs) continue;
 744
 745                 sub = NULL;
 746                 do {
 747                         /*
 748                          *      See if there's a sub-section by that
 749                          *      name.
 750                          */
 751                         next = cf_subsection_find_next(cs, sub,
 752                                                        section_type_value[comp].typename);
 753                         sub = next;
 754
 755                         /*
 756                          *      If so, look for it to define a new
 757                          *      value.
 758                          */
 759                         name2 = cf_section_name2(sub);
 760                         if (!name2) continue;
 761
 762
 763                         /*
 764                          *      If the value already exists, don't
 765                          *      create it again.
 766                          */
 767                         dval = dict_valbyname(section_type_value[comp].attr,
 768                                               name2);
 769                         if (dval) continue;
 770
 771                         /*
 772                          *      Find the attribute for the value.
 773                          */
 774                         dattr = dict_attrbyvalue(section_type_value[comp].attr);
 775                         if (!dattr) {
 776                                 radlog(L_ERR, "%s[%d]: No such attribute %s",
 777                                        mainconfig.radiusd_conf,
 778                                        cf_section_lineno(sub),
 779                                        section_type_value[comp].typename);
 780                                 continue;
 781                         }
 782
 783                         /*
 784                          *      Create a new unique value with a
 785                          *      meaningless number.  You can't look at
 786                          *      it from outside of this code, so it
 787                          *      doesn't matter.  The only requirement
 788                          *      is that it's unique.
 789                          */
 790                         do {
 791                                 value = lrad_rand() & 0x00ffffff;
 792                         } while (dict_valbyattr(dattr->attr, value));
 793
 794                         if (dict_addvalue(name2, dattr->name, value) < 0) {
 795                                 radlog(L_ERR, "%s", librad_errstr);
 796                                 return -1;
 797                         }
 798                 } while (sub != NULL);
 799
 800                 /*
 801                  *      Loop over the non-sub-sections, too.
 802                  */
 803                 cp = NULL;
 804                 do {
 805                         /*
 806                          *      See if there's a conf-pair by that
 807                          *      name.
 808                          */
 809                         cp = cf_pair_find_next(cs, cp, NULL);
 810                         if (!cp) break;
 811
 812
 813                         /*
 814                          *      If the value already exists, don't
 815                          *      create it again.
 816                          */
 817                         name2 = cf_pair_attr(cp);
 818                         dval = dict_valbyname(section_type_value[comp].attr,
 819                                               name2);
 820                         if (dval) continue;
 821
 822                         /*
 823                          *      Find the attribute for the value.
 824                          */
 825                         dattr = dict_attrbyvalue(section_type_value[comp].attr);
 826                         if (!dattr) {
 827                                 radlog(L_ERR, "%s[%d]: No such attribute %s",
 828                                        mainconfig.radiusd_conf,
 829                                        cf_section_lineno(sub),
 830                                        section_type_value[comp].typename);
 831                                 continue;
 832                         }
 833
 834                         /*
 835                          *      Finally, create the new attribute.
 836                          */
 837                         do {
 838                                 value = lrad_rand() & 0x00ffffff;
 839                         } while (dict_valbyattr(dattr->attr, value));
 840                         if (dict_addvalue(name2, dattr->name, value) < 0) {
 841                                 radlog(L_ERR, "%s", librad_errstr);
 842                                 return -1;
 843                         }
 844                 } while (cp != NULL);
 845         } /* over the sections which can have redundent sub-sections */
 846
 847         /*
 848          *      Remember where the modules were stored.
 849          */
 850         modules = cf_section_find("modules");
 851         if (!modules) {
 852                 radlog(L_ERR, "Cannot find a \"modules\" section in the configuration file!");
 853                 return -1;
 854         }
 855
 856         /*
 857          *  Look for the 'instantiate' section, which tells us
 858          *  the instantiation order of the modules, and also allows
 859          *  us to load modules with no authorize/authenticate/etc.
 860          *  sections.
 861          */
 862         cs = cf_section_find("instantiate");
 863         if (cs != NULL) {
 864                 CONF_ITEM *ci;
 865                 CONF_PAIR *cp;
 866                 module_instance_t *module;
 867                 const char *name;
 868
 869                 DEBUG2(" instantiate {");
 870
 871                 /*
 872                  *  Loop over the items in the 'instantiate' section.
 873                  */
 874                 for (ci=cf_item_find_next(cs, NULL);
 875                      ci != NULL;
 876                      ci=cf_item_find_next(cs, ci)) {
 877
 878                         /*
 879                          *      Skip sections.  They'll be handled
 880                          *      later, if they're referenced at all...
 881                          */
 882                         if (cf_item_is_section(ci)) {
 883                                 continue;
 884                         }
 885
 886                         cp = cf_itemtopair(ci);
 887                         name = cf_pair_attr(cp);
 888                         module = find_module_instance(modules, name);
 889                         if (!module) {
 890                                 return -1;
 891                         }
 892                 } /* loop over items in the subsection */
 893
 894                 DEBUG2(" }");
 895         } /* if there's an 'instantiate' section. */
 896
 897         DEBUG2(" modules {");
 898
 899         /*
 900          *      Loop over all of the known components, finding their
 901          *      configuration section, and loading it.
 902          */
 903         for (comp = 0; comp < RLM_COMPONENT_COUNT; ++comp) {
 904                 if (!do_component[comp]) continue;
 905
 906                 cs = cf_section_find(section_type_value[comp].section);
 907                 if (!cs) continue;
 908
 909                 if (cf_item_find_next(cs, NULL) == NULL) continue;
 910
 911                 DEBUG2(" Module: Checking %s {...} for more modules to load",
 912                        section_type_value[comp].section);
 913
 914                 if (load_component_section(NULL, cs, NULL, comp,
 915                                            mainconfig.radiusd_conf) < 0) {
 916                         return -1;
 917                 }
 918         } /* loop over components */
 919
 920         /*
 921          *      Load the VMPS section, if necessary.
 922          */
 923         for (listener = mainconfig.listen;
 924              listener != NULL;
 925              listener = listener->next) {
 926                 if (listener->type == RAD_LISTEN_VQP) {
 927                         break;
 928                 }
 929         }
 930
 931         if (listener) {
 932                 cs = cf_section_find("vmps");
 933                 if (!cs) {
 934                         radlog(L_ERR, "Listening on vmps socket, but no vmps section");
 935                         return -1;
 936                 }
 937
 938                 if (cf_item_find_next(cs, NULL) == NULL) {
 939                         radlog(L_ERR, "Listening on vmps socket, vmps section is empty");
 940                         return -1;
 941                 }
 942
 943                 DEBUG2(" Module: Checking vmps {...} for more modules to load");
 944
 945                 if (load_component_section(NULL, cs, VMPS_SPACE,
 946                                            RLM_COMPONENT_POST_AUTH,
 947                                            mainconfig.radiusd_conf) < 0) {
 948                         return -1;
 949                 }
 950         }
 951
 952         DEBUG2(" }");
 953
 954         return 0;
 955 }
 956
 957 /*
 958  *      Call all authorization modules until one returns
 959  *      somethings else than RLM_MODULE_OK
 960  */
 961 int module_authorize(int autz_type, REQUEST *request)
 962 {
 963         return indexed_modcall(NULL, RLM_COMPONENT_AUTZ, autz_type, request);
 964 }
 965
 966 /*
 967  *      Authenticate a user/password with various methods.
 968  */
 969 int module_authenticate(int auth_type, REQUEST *request)
 970 {
 971         return indexed_modcall(NULL, RLM_COMPONENT_AUTH, auth_type, request);
 972 }
 973
 974 /*
 975  *      Do pre-accounting for ALL configured sessions
 976  */
 977 int module_preacct(REQUEST *request)
 978 {
 979         return indexed_modcall(NULL, RLM_COMPONENT_PREACCT, 0, request);
 980 }
 981
 982 /*
 983  *      Do accounting for ALL configured sessions
 984  */
 985 int module_accounting(int acct_type, REQUEST *request)
 986 {
 987         return indexed_modcall(NULL, RLM_COMPONENT_ACCT, acct_type, request);
 988 }
 989
 990 /*
 991  *      See if a user is already logged in.
 992  *
 993  *      Returns: 0 == OK, 1 == double logins, 2 == multilink attempt
 994  */
 995 int module_checksimul(int sess_type, REQUEST *request, int maxsimul)
 996 {
 997         int rcode;
 998
 999         if(!request->username)
1000                 return 0;
1001
1002         request->simul_count = 0;
1003         request->simul_max = maxsimul;
1004         request->simul_mpp = 1;
1005
1006         rcode = indexed_modcall(NULL, RLM_COMPONENT_SESS, sess_type, request);
1007
1008         if (rcode != RLM_MODULE_OK) {
1009                 /* FIXME: Good spot for a *rate-limited* warning to the log */
1010                 return 0;
1011         }
1012
1013         return (request->simul_count < maxsimul) ? 0 : request->simul_mpp;
1014 }
1015
1016 /*
1017  *      Do pre-proxying for ALL configured sessions
1018  */
1019 int module_pre_proxy(int type, REQUEST *request)
1020 {
1021         return indexed_modcall(NULL, RLM_COMPONENT_PRE_PROXY, type, request);
1022 }
1023
1024 /*
1025  *      Do post-proxying for ALL configured sessions
1026  */
1027 int module_post_proxy(int type, REQUEST *request)
1028 {
1029         return indexed_modcall(NULL, RLM_COMPONENT_POST_PROXY, type, request);
1030 }
1031
1032 /*
1033  *      Do post-authentication for ALL configured sessions
1034  */
1035 int module_post_auth(int postauth_type, REQUEST *request)
1036 {
1037         return indexed_modcall(NULL, RLM_COMPONENT_POST_AUTH, postauth_type, request);
1038 }
1039
1040 /*
1041  *      Do VMPS
1042  */
1043 int module_vmps(REQUEST *request)
1044 {
1045         return indexed_modcall(VMPS_SPACE, RLM_COMPONENT_POST_AUTH, 0,
1046                                request);
1047 }
1048