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 (1)
  34
  35 typedef struct indexed_modcallable {
  36         int             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         const indexed_modcallable *a = one;
  81         const indexed_modcallable *b = two;
  82
  83         if (a->space < b->space) return -1;
  84         if (a->space > b->space) return +1;
  85
  86         if (a->comp < b->comp) return -1;
  87         if (a->comp >  b->comp) return +1;
  88
  89         return a->idx - b->idx;
  90 }
  91
  92
  93 /*
  94  *      Free a module instance.
  95  */
  96 static void module_instance_free(void *data)
  97 {
  98         module_instance_t *this = data;
  99
 100         if (this->entry->module->detach)
 101                 (this->entry->module->detach)(this->insthandle);
 102 #ifdef HAVE_PTHREAD_H
 103         if (this->mutex) {
 104                 /*
 105                  *      FIXME
 106                  *      The mutex MIGHT be locked...
 107                  *      we'll check for that later, I guess.
 108                  */
 109                 pthread_mutex_destroy(this->mutex);
 110                 free(this->mutex);
 111         }
 112 #endif
 113         free(this);
 114 }
 115
 116
 117 /*
 118  *      Compare two module entries
 119  */
 120 static int module_entry_cmp(const void *one, const void *two)
 121 {
 122         const module_entry_t *a = one;
 123         const module_entry_t *b = two;
 124
 125         return strcmp(a->name, b->name);
 126 }
 127
 128 /*
 129  *      Free a module entry.
 130  */
 131 static void module_entry_free(void *data)
 132 {
 133         module_entry_t *this = data;
 134
 135         lt_dlclose(this->handle);       /* ignore any errors */
 136         free(this);
 137 }
 138
 139
 140 /*
 141  *      Remove the module lists.
 142  */
 143 int detach_modules(void)
 144 {
 145         rbtree_free(components);
 146         rbtree_free(module_tree);
 147
 148         return 0;
 149 }
 150
 151
 152 /*
 153  *      Find a module on disk or in memory, and link to it.
 154  */
 155 static module_entry_t *linkto_module(const char *module_name,
 156                                      const char *cffilename, int cflineno)
 157 {
 158         module_entry_t myentry;
 159         module_entry_t *node;
 160         lt_dlhandle handle;
 161         char module_struct[256];
 162         char *p;
 163         const void *module;
 164
 165         strlcpy(myentry.name, module_name, sizeof(myentry.name));
 166         node = rbtree_finddata(module_tree, &myentry);
 167         if (node) return node;
 168
 169         /*
 170          *      Keep the handle around so we can dlclose() it.
 171          */
 172         handle = lt_dlopenext(module_name);
 173         if (handle == NULL) {
 174                 radlog(L_ERR|L_CONS, "%s[%d] Failed to link to module '%s':"
 175                        " %s\n", cffilename, cflineno, module_name, lt_dlerror());
 176                 return NULL;
 177         }
 178
 179         /*
 180          *      Link to the module's rlm_FOO{} module structure.
 181          *
 182          *      The module_name variable has the version number
 183          *      embedded in it, and we don't want that here.
 184          */
 185         strcpy(module_struct, module_name);
 186         p = strrchr(module_struct, '-');
 187         if (p) *p = '\0';
 188
 189         DEBUG3("    (Loaded %s, checking if it's valid)", module_name);
 190
 191         /*
 192          *      libltld MAY core here, if the handle it gives us contains
 193          *      garbage data.
 194          */
 195         module = lt_dlsym(handle, module_struct);
 196         if (!module) {
 197                 radlog(L_ERR|L_CONS, "%s[%d] Failed linking to "
 198                                 "%s structure in %s: %s\n",
 199                                 cffilename, cflineno,
 200                                 module_name, cffilename, lt_dlerror());
 201                 lt_dlclose(handle);
 202                 return NULL;
 203         }
 204         /*
 205          *      Before doing anything else, check if it's sane.
 206          */
 207         if ((*(const uint32_t *) module) != RLM_MODULE_MAGIC_NUMBER) {
 208                 lt_dlclose(handle);
 209                 radlog(L_ERR|L_CONS, "%s[%d] Invalid version in module '%s'",
 210                        cffilename, cflineno, module_name);
 211                 return NULL;
 212
 213         }
 214
 215         /* make room for the module type */
 216         node = rad_malloc(sizeof(*node));
 217         memset(node, 0, sizeof(*node));
 218         strlcpy(node->name, module_name, sizeof(node->name));
 219         node->module = module;
 220         node->handle = handle;
 221
 222         DEBUG(" Module: Linked to module %s", module_name);
 223
 224         /*
 225          *      Add the module as "rlm_foo-version" to the configuration
 226          *      section.
 227          */
 228         if (!rbtree_insert(module_tree, node)) {
 229                 radlog(L_ERR, "Failed to cache module %s", module_name);
 230                 lt_dlclose(handle);
 231                 free(node);
 232                 return NULL;
 233         }
 234
 235         return node;
 236 }
 237
 238 /*
 239  *      Find a module instance.
 240  */
 241 module_instance_t *find_module_instance(CONF_SECTION *modules,
 242                                         const char *instname)
 243 {
 244         CONF_SECTION *cs;
 245         const char *name1, *name2;
 246         module_instance_t *node;
 247         char module_name[256];
 248
 249         if (!modules) return NULL;
 250
 251         /*
 252          *      Module instances are declared in the modules{} block
 253          *      and referenced later by their name, which is the
 254          *      name2 from the config section, or name1 if there was
 255          *      no name2.
 256          */
 257         cs = cf_section_sub_find_name2(modules, NULL, instname);
 258         if (cs == NULL) {
 259                 radlog(L_ERR|L_CONS, "ERROR: Cannot find a configuration entry for module \"%s\".\n", instname);
 260                 return NULL;
 261         }
 262
 263         /*
 264          *      If there's already a module instance, return it.
 265          */
 266         node = cf_data_find(cs, "instance");
 267         if (node) return node;
 268
 269         name1 = cf_section_name1(cs);
 270         name2 = cf_section_name2(cs);
 271
 272         /*
 273          *      Found the configuration entry.
 274          */
 275         node = rad_malloc(sizeof(*node));
 276         memset(node, 0, sizeof(*node));
 277
 278         node->insthandle = NULL;
 279
 280         /*
 281          *      Names in the "modules" section aren't prefixed
 282          *      with "rlm_", so we add it here.
 283          */
 284         snprintf(module_name, sizeof(module_name), "rlm_%s", name1);
 285
 286         node->entry = linkto_module(module_name,
 287                                     mainconfig.radiusd_conf,
 288                                     cf_section_lineno(cs));
 289         if (!node->entry) {
 290                 free(node);
 291                 /* linkto_module logs any errors */
 292                 return NULL;
 293         }
 294
 295         DEBUG2(" Module: Instantiating %s", instname);
 296
 297         /*
 298          *      Call the module's instantiation routine.
 299          */
 300         if ((node->entry->module->instantiate) &&
 301             ((node->entry->module->instantiate)(cs, &node->insthandle) < 0)) {
 302                 radlog(L_ERR|L_CONS,
 303                                 "%s[%d]: %s: Module instantiation failed.\n",
 304                        mainconfig.radiusd_conf, cf_section_lineno(cs),
 305                        instname);
 306                 free(node);
 307                 return NULL;
 308         }
 309
 310         /*
 311          *      We're done.  Fill in the rest of the data structure,
 312          *      and link it to the module instance list.
 313          */
 314         strlcpy(node->name, instname, sizeof(node->name));
 315
 316 #ifdef HAVE_PTHREAD_H
 317         /*
 318          *      If we're threaded, check if the module is thread-safe.
 319          *
 320          *      If it isn't, we create a mutex.
 321          */
 322         if ((node->entry->module->type & RLM_TYPE_THREAD_UNSAFE) != 0) {
 323                 node->mutex = (pthread_mutex_t *) rad_malloc(sizeof(pthread_mutex_t));
 324                 /*
 325                  *      Initialize the mutex.
 326                  */
 327                 pthread_mutex_init(node->mutex, NULL);
 328         } else {
 329                 /*
 330                  *      The module is thread-safe.  Don't give it a mutex.
 331                  */
 332                 node->mutex = NULL;
 333         }
 334
 335 #endif
 336         cf_data_add(cs, "instance", node, module_instance_free);
 337
 338         return node;
 339 }
 340
 341 static indexed_modcallable *lookup_by_index(int space, int comp, int idx)
 342 {
 343         indexed_modcallable myc;
 344
 345         myc.comp = comp;
 346         myc.idx = idx;
 347         myc.space = space;
 348
 349         return rbtree_finddata(components, &myc);
 350 }
 351
 352 /*
 353  *      Create a new sublist.
 354  */
 355 static indexed_modcallable *new_sublist(int space, int comp, int idx)
 356 {
 357         indexed_modcallable *c;
 358
 359         c = lookup_by_index(space, comp, idx);
 360
 361         /* It is an error to try to create a sublist that already
 362          * exists. It would almost certainly be caused by accidental
 363          * duplication in the config file.
 364          *
 365          * index 0 is the exception, because it is used when we want
 366          * to collect _all_ listed modules under a single index by
 367          * default, which is currently the case in all components
 368          * except authenticate. */
 369         if (c) {
 370                 if (idx == 0) {
 371                         return c;
 372                 }
 373                 return NULL;
 374         }
 375
 376         c = rad_malloc(sizeof(*c));
 377         c->modulelist = NULL;
 378         c->space = space;
 379         c->comp = comp;
 380         c->idx = idx;
 381
 382         if (!rbtree_insert(components, c)) {
 383                 free(c);
 384                 return NULL;
 385         }
 386
 387         return c;
 388 }
 389
 390 static int indexed_modcall(int space, int comp, int idx, REQUEST *request)
 391 {
 392         int rcode;
 393         indexed_modcallable *this;
 394
 395         this = lookup_by_index(space, comp, idx);
 396         if (!this) {
 397                 if (idx != 0) DEBUG2("  ERROR: Unknown value specified for %s.  Cannot perform requested action.",
 398                                      section_type_value[comp].typename);
 399                 request->component = section_type_value[comp].typename;
 400                 rcode = modcall(comp, NULL, request); /* does default action */
 401         } else {
 402                 DEBUG2("  Processing the %s section of %s",
 403                        (space == 0) ? section_type_value[comp].section : "vmps",
 404                        mainconfig.radiusd_conf);
 405                 request->component = section_type_value[comp].typename;
 406                 rcode = modcall(comp, this->modulelist, request);
 407         }
 408         request->module = "<server-core>";
 409         request->component = "<server-core>";
 410         return rcode;
 411 }
 412
 413 /*
 414  *      Load a sub-module list, as found inside an Auth-Type foo {}
 415  *      block
 416  */
 417 static int load_subcomponent_section(modcallable *parent,
 418                                      CONF_SECTION *cs, int space, int comp,
 419                                      const char *filename)
 420 {
 421         indexed_modcallable *subcomp;
 422         modcallable *ml;
 423         DICT_VALUE *dval;
 424         const char *name2 = cf_section_name2(cs);
 425
 426         rad_assert(comp >= RLM_COMPONENT_AUTH);
 427         rad_assert(comp <= RLM_COMPONENT_COUNT);
 428
 429         /*
 430          *      Sanity check.
 431          */
 432         if (!name2) {
 433                 radlog(L_ERR|L_CONS,
 434                        "%s[%d]: No name specified for %s block",
 435                        filename, cf_section_lineno(cs),
 436                        section_type_value[comp].typename);
 437                 return 1;
 438         }
 439
 440         /*
 441          *      Compile the group.
 442          */
 443         ml = compile_modgroup(parent, comp, cs, filename);
 444         if (!ml) {
 445                 return 0;
 446         }
 447
 448         /*
 449          *      We must assign a numeric index to this subcomponent.
 450          *      It is generated and placed in the dictionary by
 451          *      setup_modules(), when it loads the sections.  If it
 452          *      isn't found, it's a serious error.
 453          */
 454         dval = dict_valbyname(section_type_value[comp].attr, name2);
 455         if (!dval) {
 456                 radlog(L_ERR|L_CONS,
 457                        "%s[%d] %s %s Not previously configured",
 458                        filename, cf_section_lineno(cs),
 459                        section_type_value[comp].typename, name2);
 460                 modcallable_free(&ml);
 461                 return 0;
 462         }
 463
 464         subcomp = new_sublist(space, comp, dval->value);
 465         if (!subcomp) {
 466                 radlog(L_ERR|L_CONS,
 467                        "%s[%d] %s %s already configured - skipping",
 468                        filename, cf_section_lineno(cs),
 469                        section_type_value[comp].typename, name2);
 470                 modcallable_free(&ml);
 471                 return 1;
 472         }
 473
 474         subcomp->modulelist = ml;
 475         return 1;               /* OK */
 476 }
 477
 478 static int load_component_section(modcallable *parent,
 479                                   CONF_SECTION *cs, int space, int comp,
 480                                   const char *filename)
 481 {
 482         modcallable *this;
 483         CONF_ITEM *modref;
 484         int idx;
 485         indexed_modcallable *subcomp;
 486         const char *modname;
 487         const char *visiblename;
 488
 489         /*
 490          *      Loop over the entries in the named section.
 491          */
 492         for (modref = cf_item_find_next(cs, NULL);
 493              modref != NULL;
 494              modref = cf_item_find_next(cs, modref)) {
 495                 CONF_PAIR *cp = NULL;
 496                 CONF_SECTION *scs = NULL;
 497
 498                 /*
 499                  *      Look for Auth-Type foo {}, which are special
 500                  *      cases of named sections, and allowable ONLY
 501                  *      at the top-level.
 502                  *
 503                  *      i.e. They're not allowed in a "group" or "redundant"
 504                  *      subsection.
 505                  */
 506                 if (cf_item_is_section(modref)) {
 507                         const char *sec_name;
 508                         scs = cf_itemtosection(modref);
 509
 510                         sec_name = cf_section_name1(scs);
 511
 512                         if (strcmp(sec_name,
 513                                    section_type_value[comp].typename) == 0) {
 514                                 if (!load_subcomponent_section(parent, scs,
 515                                                                space, comp,
 516                                                                filename)) {
 517                                         return -1; /* FIXME: memleak? */
 518                                 }
 519                                 continue;
 520                         }
 521
 522                         cp = NULL;
 523                 } else if (cf_item_is_pair(modref)) {
 524                         cp = cf_itemtopair(modref);
 525                 } else {
 526                         continue; /* ignore it */
 527                 }
 528
 529                 /*
 530                  *      Try to compile one entry.
 531                  */
 532                 this = compile_modsingle(parent, comp, modref, filename,
 533                                          &modname);
 534                 if (!this) {
 535                         radlog(L_ERR|L_CONS,
 536                                "%s[%d] Failed to parse %s section.\n",
 537                                filename, cf_section_lineno(cs),
 538                                cf_section_name1(cs));
 539                         return -1;
 540                 }
 541
 542                 if (comp == RLM_COMPONENT_AUTH) {
 543                         DICT_VALUE *dval;
 544                         const char *modrefname = NULL;
 545                         int lineno = 0;
 546
 547                         if (cp) {
 548                                 modrefname = cf_pair_attr(cp);
 549                                 lineno = cf_pair_lineno(cp);
 550                         } else {
 551                                 modrefname = cf_section_name2(scs);
 552                                 lineno = cf_section_lineno(scs);
 553                                 if (!modrefname) {
 554                                         radlog(L_ERR|L_CONS,
 555                                                "%s[%d] Failed to parse %s sub-section.\n",
 556                                                filename, lineno,
 557                                                cf_section_name1(scs));
 558                                         return -1;
 559                                 }
 560                         }
 561
 562                         dval = dict_valbyname(PW_AUTH_TYPE, modrefname);
 563                         if (!dval) {
 564                                 /*
 565                                  *      It's a section, but nothing we
 566                                  *      recognize.  Die!
 567                                  */
 568                                 radlog(L_ERR|L_CONS, "%s[%d] Unknown Auth-Type \"%s\" in %s sub-section.",
 569                                        filename, lineno,
 570                                        modrefname, section_type_value[comp].section);
 571                                 return -1;
 572                         }
 573                         idx = dval->value;
 574                 } else {
 575                         /* See the comment in new_sublist() for explanation
 576                          * of the special index 0 */
 577                         idx = 0;
 578                 }
 579
 580                 subcomp = new_sublist(space, comp, idx);
 581                 if (subcomp == NULL) {
 582                         radlog(L_INFO|L_CONS,
 583                                         "%s %s %s already configured - skipping",
 584                                         filename, section_type_value[comp].typename,
 585                                         modname);
 586                         modcallable_free(&this);
 587                         continue;
 588                 }
 589
 590                 /* If subcomp->modulelist is NULL, add_to_modcallable will
 591                  * create it */
 592                 visiblename = cf_section_name2(cs);
 593                 if (visiblename == NULL)
 594                         visiblename = cf_section_name1(cs);
 595                 add_to_modcallable(&subcomp->modulelist, this,
 596                                    comp, visiblename);
 597         }
 598
 599         return 0;
 600 }
 601
 602
 603 /*
 604  *      Parse the module config sections, and load
 605  *      and call each module's init() function.
 606  *
 607  *      Libtool makes your life a LOT easier, especially with libltdl.
 608  *      see: http://www.gnu.org/software/libtool/
 609  */
 610 int setup_modules(int reload)
 611 {
 612         int             comp;
 613         CONF_SECTION    *cs, *modules;
 614         int             do_component[RLM_COMPONENT_COUNT];
 615         rad_listen_t    *listener;
 616
 617         /*
 618          *      If necessary, initialize libltdl.
 619          */
 620         if (!reload) {
 621                 /*
 622                  *      Set the default list of preloaded symbols.
 623                  *      This is used to initialize libltdl's list of
 624                  *      preloaded modules.
 625                  *
 626                  *      i.e. Static modules.
 627                  */
 628                 LTDL_SET_PRELOADED_SYMBOLS();
 629
 630                 if (lt_dlinit() != 0) {
 631                         radlog(L_ERR|L_CONS, "Failed to initialize libraries: %s\n",
 632                                         lt_dlerror());
 633                         return -1;
 634                 }
 635
 636                 /*
 637                  *      Set the search path to ONLY our library directory.
 638                  *      This prevents the modules from being found from
 639                  *      any location on the disk.
 640                  */
 641                 lt_dlsetsearchpath(radlib_dir);
 642
 643                 DEBUG2("radiusd: Library search path is %s",
 644                        lt_dlgetsearchpath());
 645
 646                 /*
 647                  *      Set up the internal module struct.
 648                  */
 649                 module_tree = rbtree_create(module_entry_cmp,
 650                                             module_entry_free, 0);
 651                 if (!module_tree) {
 652                         radlog(L_ERR|L_CONS, "Failed to initialize modules\n");
 653                         return -1;
 654                 }
 655         } else {
 656                 rbtree_free(components);
 657         }
 658
 659         components = rbtree_create(indexed_modcallable_cmp,
 660                                    indexed_modcallable_free, 0);
 661         if (!components) {
 662                 radlog(L_ERR|L_CONS, "Failed to initialize components\n");
 663                 return -1;
 664         }
 665
 666         /*
 667          *      Figure out which sections to load.
 668          */
 669         memset(do_component, 0, sizeof(do_component));
 670         for (listener = mainconfig.listen;
 671              listener != NULL;
 672              listener = listener->next) {
 673                 switch (listener->type) {
 674                 case RAD_LISTEN_AUTH:
 675                         do_component[RLM_COMPONENT_AUTZ] = 1;
 676                         do_component[RLM_COMPONENT_AUTH] = 1;
 677                         do_component[RLM_COMPONENT_POST_AUTH] = 1;
 678                         do_component[RLM_COMPONENT_SESS] = 1;
 679                         break;
 680
 681                 case RAD_LISTEN_DETAIL: /* just like acct */
 682                 case RAD_LISTEN_ACCT:
 683                         do_component[RLM_COMPONENT_PREACCT] = 1;
 684                         do_component[RLM_COMPONENT_ACCT] = 1;
 685                         break;
 686
 687                 case RAD_LISTEN_PROXY:
 688                         do_component[RLM_COMPONENT_PRE_PROXY] = 1;
 689                         do_component[RLM_COMPONENT_POST_PROXY] = 1;
 690                         break;
 691
 692                 case RAD_LISTEN_VQP:
 693                         do_component[RLM_COMPONENT_POST_AUTH] = 1;
 694                         break;
 695                         /*
 696                          *      Ignore this.
 697                          */
 698                 case RAD_LISTEN_SNMP:
 699                         break;
 700
 701                 default:
 702                         rad_assert(0 == 1);
 703                         break;
 704                 }
 705         }
 706
 707         for (comp = RLM_COMPONENT_AUTH; comp < RLM_COMPONENT_COUNT; comp++) {
 708                 /*
 709                  *      Have the debugging messages all in one place.
 710                  */
 711                 if (!do_component[comp]) {
 712                         DEBUG2("modules: Not loading %s{} section",
 713                                section_type_value[comp].section);
 714                 }
 715         }
 716
 717         /*
 718          *      Create any DICT_VALUE's for the types.  See
 719          *      'doc/configurable_failover' for examples of 'authtype'
 720          *      used to create new Auth-Type values.  In order to
 721          *      let the user create new names, we've got to look for
 722          *      those names, and create DICT_VALUE's for them.
 723          */
 724         for (comp = RLM_COMPONENT_AUTH; comp < RLM_COMPONENT_COUNT; comp++) {
 725                 int             value;
 726                 const char      *name2;
 727                 DICT_ATTR       *dattr;
 728                 DICT_VALUE      *dval;
 729                 CONF_SECTION    *sub, *next;
 730                 CONF_PAIR       *cp;
 731
 732                 /*
 733                  *      Not needed, don't load it.
 734                  */
 735                 if (!do_component[comp]) {
 736                         continue;
 737                 }
 738                 cs = cf_section_find(section_type_value[comp].section);
 739
 740                 if (!cs) continue;
 741
 742                 sub = NULL;
 743                 do {
 744                         /*
 745                          *      See if there's a sub-section by that
 746                          *      name.
 747                          */
 748                         next = cf_subsection_find_next(cs, sub,
 749                                                        section_type_value[comp].typename);
 750                         sub = next;
 751
 752                         /*
 753                          *      If so, look for it to define a new
 754                          *      value.
 755                          */
 756                         name2 = cf_section_name2(sub);
 757                         if (!name2) continue;
 758
 759
 760                         /*
 761                          *      If the value already exists, don't
 762                          *      create it again.
 763                          */
 764                         dval = dict_valbyname(section_type_value[comp].attr,
 765                                               name2);
 766                         if (dval) continue;
 767
 768                         /*
 769                          *      Find the attribute for the value.
 770                          */
 771                         dattr = dict_attrbyvalue(section_type_value[comp].attr);
 772                         if (!dattr) {
 773                                 radlog(L_ERR, "%s[%d]: No such attribute %s",
 774                                        mainconfig.radiusd_conf,
 775                                        cf_section_lineno(sub),
 776                                        section_type_value[comp].typename);
 777                                 continue;
 778                         }
 779
 780                         /*
 781                          *      Create a new unique value with a
 782                          *      meaningless number.  You can't look at
 783                          *      it from outside of this code, so it
 784                          *      doesn't matter.  The only requirement
 785                          *      is that it's unique.
 786                          */
 787                         do {
 788                                 value = lrad_rand() & 0x00ffffff;
 789                         } while (dict_valbyattr(dattr->attr, value));
 790
 791                         if (dict_addvalue(name2, dattr->name, value) < 0) {
 792                                 radlog(L_ERR, "%s", librad_errstr);
 793                                 return -1;
 794                         }
 795                 } while (sub != NULL);
 796
 797                 /*
 798                  *      Loop over the non-sub-sections, too.
 799                  */
 800                 cp = NULL;
 801                 do {
 802                         /*
 803                          *      See if there's a conf-pair by that
 804                          *      name.
 805                          */
 806                         cp = cf_pair_find_next(cs, cp, NULL);
 807                         if (!cp) break;
 808
 809
 810                         /*
 811                          *      If the value already exists, don't
 812                          *      create it again.
 813                          */
 814                         name2 = cf_pair_attr(cp);
 815                         dval = dict_valbyname(section_type_value[comp].attr,
 816                                               name2);
 817                         if (dval) continue;
 818
 819                         /*
 820                          *      Find the attribute for the value.
 821                          */
 822                         dattr = dict_attrbyvalue(section_type_value[comp].attr);
 823                         if (!dattr) {
 824                                 radlog(L_ERR, "%s[%d]: No such attribute %s",
 825                                        mainconfig.radiusd_conf,
 826                                        cf_section_lineno(sub),
 827                                        section_type_value[comp].typename);
 828                                 continue;
 829                         }
 830
 831                         /*
 832                          *      Finally, create the new attribute.
 833                          */
 834                         do {
 835                                 value = lrad_rand() & 0x00ffffff;
 836                         } while (dict_valbyattr(dattr->attr, value));
 837                         if (dict_addvalue(name2, dattr->name, value) < 0) {
 838                                 radlog(L_ERR, "%s", librad_errstr);
 839                                 return -1;
 840                         }
 841                 } while (cp != NULL);
 842         } /* over the sections which can have redundent sub-sections */
 843
 844         /*
 845          *      Remember where the modules were stored.
 846          */
 847         modules = cf_section_find("modules");
 848         if (!modules) {
 849                 radlog(L_ERR, "Cannot find a \"modules\" section in the configuration file!");
 850                 return -1;
 851         }
 852
 853         /*
 854          *  Look for the 'instantiate' section, which tells us
 855          *  the instantiation order of the modules, and also allows
 856          *  us to load modules with no authorize/authenticate/etc.
 857          *  sections.
 858          */
 859         cs = cf_section_find("instantiate");
 860         if (cs != NULL) {
 861                 CONF_ITEM *ci;
 862                 CONF_PAIR *cp;
 863                 module_instance_t *module;
 864                 const char *name;
 865
 866                 DEBUG2(" instantiate {");
 867
 868                 /*
 869                  *  Loop over the items in the 'instantiate' section.
 870                  */
 871                 for (ci=cf_item_find_next(cs, NULL);
 872                      ci != NULL;
 873                      ci=cf_item_find_next(cs, ci)) {
 874
 875                         /*
 876                          *      Skip sections.  They'll be handled
 877                          *      later, if they're referenced at all...
 878                          */
 879                         if (cf_item_is_section(ci)) {
 880                                 continue;
 881                         }
 882
 883                         cp = cf_itemtopair(ci);
 884                         name = cf_pair_attr(cp);
 885                         module = find_module_instance(modules, name);
 886                         if (!module) {
 887                                 return -1;
 888                         }
 889                 } /* loop over items in the subsection */
 890
 891                 DEBUG2(" }");
 892         } /* if there's an 'instantiate' section. */
 893
 894         DEBUG2(" modules {");
 895
 896         /*
 897          *      Loop over all of the known components, finding their
 898          *      configuration section, and loading it.
 899          */
 900         for (comp = 0; comp < RLM_COMPONENT_COUNT; ++comp) {
 901                 cs = cf_section_find(section_type_value[comp].section);
 902                 if (cs == NULL)
 903                         continue;
 904
 905                 if (!do_component[comp]) {
 906                         continue;
 907                 }
 908
 909                 if (cf_item_find_next(cs, NULL) == NULL) {
 910                         continue; /* section is empty */
 911                 }
 912
 913                 DEBUG2(" Module: Checking %s {...} for more modules to load",
 914                        section_type_value[comp].section);
 915
 916                 if (load_component_section(NULL, cs, 0, comp, mainconfig.radiusd_conf) < 0) {
 917                         return -1;
 918                 }
 919         }
 920
 921         /*
 922          *      Load the VMPS section, if necessary.
 923          */
 924         for (listener = mainconfig.listen;
 925              listener != NULL;
 926              listener = listener->next) {
 927                 if (listener->type == RAD_LISTEN_VQP) {
 928                         break;
 929                 }
 930         }
 931
 932         if (listener) {
 933                 cs = cf_section_find("vmps");
 934                 if (!cs) {
 935                         radlog(L_ERR, "Listening on vmps socket, but no vmps section");
 936                         return -1;
 937                 }
 938
 939                 if (cf_item_find_next(cs, NULL) == NULL) {
 940                         radlog(L_ERR, "Listening on vmps socket, vmps section is empty");
 941                         return -1;
 942                 }
 943
 944                 DEBUG2(" Module: Checking vmps {...} for more modules to load");
 945
 946                 if (load_component_section(NULL, cs, VMPS_SPACE,
 947                                            RLM_COMPONENT_POST_AUTH,
 948                                            mainconfig.radiusd_conf) < 0) {
 949                         return -1;
 950                 }
 951         }
 952
 953         DEBUG2(" }");
 954
 955         return 0;
 956 }
 957
 958 /*
 959  *      Call all authorization modules until one returns
 960  *      somethings else than RLM_MODULE_OK
 961  */
 962 int module_authorize(int autz_type, REQUEST *request)
 963 {
 964         return indexed_modcall(0, RLM_COMPONENT_AUTZ, autz_type, request);
 965 }
 966
 967 /*
 968  *      Authenticate a user/password with various methods.
 969  */
 970 int module_authenticate(int auth_type, REQUEST *request)
 971 {
 972         return indexed_modcall(0, RLM_COMPONENT_AUTH, auth_type, request);
 973 }
 974
 975 /*
 976  *      Do pre-accounting for ALL configured sessions
 977  */
 978 int module_preacct(REQUEST *request)
 979 {
 980         return indexed_modcall(0, RLM_COMPONENT_PREACCT, 0, request);
 981 }
 982
 983 /*
 984  *      Do accounting for ALL configured sessions
 985  */
 986 int module_accounting(int acct_type, REQUEST *request)
 987 {
 988         return indexed_modcall(0, RLM_COMPONENT_ACCT, acct_type, request);
 989 }
 990
 991 /*
 992  *      See if a user is already logged in.
 993  *
 994  *      Returns: 0 == OK, 1 == double logins, 2 == multilink attempt
 995  */
 996 int module_checksimul(int sess_type, REQUEST *request, int maxsimul)
 997 {
 998         int rcode;
 999
1000         if(!request->username)
1001                 return 0;
1002
1003         request->simul_count = 0;
1004         request->simul_max = maxsimul;
1005         request->simul_mpp = 1;
1006
1007         rcode = indexed_modcall(0, RLM_COMPONENT_SESS, sess_type, request);
1008
1009         if (rcode != RLM_MODULE_OK) {
1010                 /* FIXME: Good spot for a *rate-limited* warning to the log */
1011                 return 0;
1012         }
1013
1014         return (request->simul_count < maxsimul) ? 0 : request->simul_mpp;
1015 }
1016
1017 /*
1018  *      Do pre-proxying for ALL configured sessions
1019  */
1020 int module_pre_proxy(int type, REQUEST *request)
1021 {
1022         return indexed_modcall(0, RLM_COMPONENT_PRE_PROXY, type, request);
1023 }
1024
1025 /*
1026  *      Do post-proxying for ALL configured sessions
1027  */
1028 int module_post_proxy(int type, REQUEST *request)
1029 {
1030         return indexed_modcall(0, RLM_COMPONENT_POST_PROXY, type, request);
1031 }
1032
1033 /*
1034  *      Do post-authentication for ALL configured sessions
1035  */
1036 int module_post_auth(int postauth_type, REQUEST *request)
1037 {
1038         return indexed_modcall(0, RLM_COMPONENT_POST_AUTH, postauth_type, request);
1039 }
1040
1041 /*
1042  *      Do VMPS
1043  */
1044 int module_vmps(REQUEST *request)
1045 {
1046         return indexed_modcall(VMPS_SPACE, RLM_COMPONENT_POST_AUTH, 0,
1047                                request);
1048 }
1049