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         if (a->space && !b->space) return -1;
  85         if (!a->space && b->space) return +1;
  86         if (a->space && b->space) {
  87                 rcode = strcmp(a->space, b->space);
  88                 if (rcode != 0) return rcode;
  89         }
  90
  91         if (a->comp < b->comp) return -1;
  92         if (a->comp >  b->comp) return +1;
  93
  94         return a->idx - b->idx;
  95 }
  96
  97
  98 /*
  99  *      Free a module instance.
 100  */
 101 static void module_instance_free(void *data)
 102 {
 103         module_instance_t *this = data;
 104
 105         if (this->entry->module->detach)
 106                 (this->entry->module->detach)(this->insthandle);
 107 #ifdef HAVE_PTHREAD_H
 108         if (this->mutex) {
 109                 /*
 110                  *      FIXME
 111                  *      The mutex MIGHT be locked...
 112                  *      we'll check for that later, I guess.
 113                  */
 114                 pthread_mutex_destroy(this->mutex);
 115                 free(this->mutex);
 116         }
 117 #endif
 118         free(this);
 119 }
 120
 121
 122 /*
 123  *      Compare two module entries
 124  */
 125 static int module_entry_cmp(const void *one, const void *two)
 126 {
 127         const module_entry_t *a = one;
 128         const module_entry_t *b = two;
 129
 130         return strcmp(a->name, b->name);
 131 }
 132
 133 /*
 134  *      Free a module entry.
 135  */
 136 static void module_entry_free(void *data)
 137 {
 138         module_entry_t *this = data;
 139
 140         lt_dlclose(this->handle);       /* ignore any errors */
 141         free(this);
 142 }
 143
 144
 145 /*
 146  *      Remove the module lists.
 147  */
 148 int detach_modules(void)
 149 {
 150         rbtree_free(components);
 151         rbtree_free(module_tree);
 152
 153         return 0;
 154 }
 155
 156
 157 /*
 158  *      Find a module on disk or in memory, and link to it.
 159  */
 160 static module_entry_t *linkto_module(const char *module_name,
 161                                      const char *cffilename, int cflineno)
 162 {
 163         module_entry_t myentry;
 164         module_entry_t *node;
 165         lt_dlhandle handle;
 166         char module_struct[256];
 167         char *p;
 168         const void *module;
 169
 170         strlcpy(myentry.name, module_name, sizeof(myentry.name));
 171         node = rbtree_finddata(module_tree, &myentry);
 172         if (node) return node;
 173
 174         /*
 175          *      Keep the handle around so we can dlclose() it.
 176          */
 177         handle = lt_dlopenext(module_name);
 178         if (handle == NULL) {
 179                 radlog(L_ERR|L_CONS, "%s[%d] Failed to link to module '%s':"
 180                        " %s\n", cffilename, cflineno, module_name, lt_dlerror());
 181                 return NULL;
 182         }
 183
 184         /*
 185          *      Link to the module's rlm_FOO{} module structure.
 186          *
 187          *      The module_name variable has the version number
 188          *      embedded in it, and we don't want that here.
 189          */
 190         strcpy(module_struct, module_name);
 191         p = strrchr(module_struct, '-');
 192         if (p) *p = '\0';
 193
 194         DEBUG3("    (Loaded %s, checking if it's valid)", module_name);
 195
 196         /*
 197          *      libltld MAY core here, if the handle it gives us contains
 198          *      garbage data.
 199          */
 200         module = lt_dlsym(handle, module_struct);
 201         if (!module) {
 202                 radlog(L_ERR|L_CONS, "%s[%d] Failed linking to "
 203                                 "%s structure in %s: %s\n",
 204                                 cffilename, cflineno,
 205                                 module_name, cffilename, lt_dlerror());
 206                 lt_dlclose(handle);
 207                 return NULL;
 208         }
 209         /*
 210          *      Before doing anything else, check if it's sane.
 211          */
 212         if ((*(const uint32_t *) module) != RLM_MODULE_MAGIC_NUMBER) {
 213                 lt_dlclose(handle);
 214                 radlog(L_ERR|L_CONS, "%s[%d] Invalid version in module '%s'",
 215                        cffilename, cflineno, module_name);
 216                 return NULL;
 217
 218         }
 219
 220         /* make room for the module type */
 221         node = rad_malloc(sizeof(*node));
 222         memset(node, 0, sizeof(*node));
 223         strlcpy(node->name, module_name, sizeof(node->name));
 224         node->module = module;
 225         node->handle = handle;
 226
 227         DEBUG(" Module: Linked to module %s", module_name);
 228
 229         /*
 230          *      Add the module as "rlm_foo-version" to the configuration
 231          *      section.
 232          */
 233         if (!rbtree_insert(module_tree, node)) {
 234                 radlog(L_ERR, "Failed to cache module %s", module_name);
 235                 lt_dlclose(handle);
 236                 free(node);
 237                 return NULL;
 238         }
 239
 240         return node;
 241 }
 242
 243 /*
 244  *      Find a module instance.
 245  */
 246 module_instance_t *find_module_instance(CONF_SECTION *modules,
 247                                         const char *instname)
 248 {
 249         CONF_SECTION *cs;
 250         const char *name1, *name2;
 251         module_instance_t *node;
 252         char module_name[256];
 253
 254         if (!modules) return NULL;
 255
 256         /*
 257          *      Module instances are declared in the modules{} block
 258          *      and referenced later by their name, which is the
 259          *      name2 from the config section, or name1 if there was
 260          *      no name2.
 261          */
 262         cs = cf_section_sub_find_name2(modules, NULL, instname);
 263         if (cs == NULL) {
 264                 radlog(L_ERR|L_CONS, "ERROR: Cannot find a configuration entry for module \"%s\".\n", instname);
 265                 return NULL;
 266         }
 267
 268         /*
 269          *      If there's already a module instance, return it.
 270          */
 271         node = cf_data_find(cs, "instance");
 272         if (node) return node;
 273
 274         name1 = cf_section_name1(cs);
 275         name2 = cf_section_name2(cs);
 276
 277         /*
 278          *      Found the configuration entry.
 279          */
 280         node = rad_malloc(sizeof(*node));
 281         memset(node, 0, sizeof(*node));
 282
 283         node->insthandle = NULL;
 284
 285         /*
 286          *      Names in the "modules" section aren't prefixed
 287          *      with "rlm_", so we add it here.
 288          */
 289         snprintf(module_name, sizeof(module_name), "rlm_%s", name1);
 290
 291         node->entry = linkto_module(module_name,
 292                                     mainconfig.radiusd_conf,
 293                                     cf_section_lineno(cs));
 294         if (!node->entry) {
 295                 free(node);
 296                 /* linkto_module logs any errors */
 297                 return NULL;
 298         }
 299
 300         DEBUG2(" Module: Instantiating %s", instname);
 301
 302         /*
 303          *      Call the module's instantiation routine.
 304          */
 305         if ((node->entry->module->instantiate) &&
 306             ((node->entry->module->instantiate)(cs, &node->insthandle) < 0)) {
 307                 radlog(L_ERR|L_CONS,
 308                                 "%s[%d]: %s: Module instantiation failed.\n",
 309                        mainconfig.radiusd_conf, cf_section_lineno(cs),
 310                        instname);
 311                 free(node);
 312                 return NULL;
 313         }
 314
 315         /*
 316          *      We're done.  Fill in the rest of the data structure,
 317          *      and link it to the module instance list.
 318          */
 319         strlcpy(node->name, instname, sizeof(node->name));
 320
 321 #ifdef HAVE_PTHREAD_H
 322         /*
 323          *      If we're threaded, check if the module is thread-safe.
 324          *
 325          *      If it isn't, we create a mutex.
 326          */
 327         if ((node->entry->module->type & RLM_TYPE_THREAD_UNSAFE) != 0) {
 328                 node->mutex = (pthread_mutex_t *) rad_malloc(sizeof(pthread_mutex_t));
 329                 /*
 330                  *      Initialize the mutex.
 331                  */
 332                 pthread_mutex_init(node->mutex, NULL);
 333         } else {
 334                 /*
 335                  *      The module is thread-safe.  Don't give it a mutex.
 336                  */
 337                 node->mutex = NULL;
 338         }
 339
 340 #endif
 341         cf_data_add(cs, "instance", node, module_instance_free);
 342
 343         return node;
 344 }
 345
 346 static indexed_modcallable *lookup_by_index(const char *space, int comp,
 347                                             int idx)
 348 {
 349         indexed_modcallable myc;
 350
 351         myc.comp = comp;
 352         myc.idx = idx;
 353         myc.space = space;
 354
 355         return rbtree_finddata(components, &myc);
 356 }
 357
 358 /*
 359  *      Create a new sublist.
 360  */
 361 static indexed_modcallable *new_sublist(const char *space, int comp, int idx)
 362 {
 363         indexed_modcallable *c;
 364
 365         c = lookup_by_index(space, comp, idx);
 366
 367         /* It is an error to try to create a sublist that already
 368          * exists. It would almost certainly be caused by accidental
 369          * duplication in the config file.
 370          *
 371          * index 0 is the exception, because it is used when we want
 372          * to collect _all_ listed modules under a single index by
 373          * default, which is currently the case in all components
 374          * except authenticate. */
 375         if (c) {
 376                 if (idx == 0) {
 377                         return c;
 378                 }
 379                 return NULL;
 380         }
 381
 382         c = rad_malloc(sizeof(*c));
 383         c->modulelist = NULL;
 384         c->space = space;
 385         c->comp = comp;
 386         c->idx = idx;
 387
 388         if (!rbtree_insert(components, c)) {
 389                 free(c);
 390                 return NULL;
 391         }
 392
 393         return c;
 394 }
 395
 396 static int indexed_modcall(const char *space, int comp, int idx,
 397                            REQUEST *request)
 398 {
 399         int rcode;
 400         indexed_modcallable *this;
 401         modcallable *list = NULL;
 402
 403         this = lookup_by_index(space, comp, idx);
 404         if (!this) {
 405                 if (idx != 0) DEBUG2("  ERROR: Unknown value specified for %s.  Cannot perform requested action.",
 406                                      section_type_value[comp].typename);
 407         } else {
 408                 list = this->modulelist;
 409         }
 410
 411         request->component = section_type_value[comp].section;
 412
 413         rcode = modcall(comp, list, 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, CONF_SECTION *cs,
 425                                      const char *space,
 426                                      int comp, 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(space, comp, dval->value);
 472         if (!subcomp) {
 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                         modcallable_free(&this);
 586                         continue;
 587                 }
 588
 589                 /* If subcomp->modulelist is NULL, add_to_modcallable will
 590                  * create it */
 591                 visiblename = cf_section_name2(cs);
 592                 if (visiblename == NULL)
 593                         visiblename = cf_section_name1(cs);
 594                 add_to_modcallable(&subcomp->modulelist, this,
 595                                    comp, visiblename);
 596         }
 597
 598         return 0;
 599 }
 600
 601 static int load_byspace(CONF_SECTION *cs, const char *space,
 602                         int *do_component)
 603 {
 604         int comp;
 605
 606         DEBUG2(" modules {");
 607
 608         /*
 609          *      Loop over all of the known components, finding their
 610          *      configuration section, and loading it.
 611          */
 612         for (comp = 0; comp < RLM_COMPONENT_COUNT; ++comp) {
 613                 CONF_SECTION *subcs;
 614
 615                 if (!do_component[comp]) continue;
 616
 617                 subcs = cf_section_sub_find(cs,
 618                                             section_type_value[comp].section);
 619                 if (!subcs) continue;
 620
 621                 if (cf_item_find_next(subcs, NULL) == NULL) continue;
 622
 623                 DEBUG2(" Module: Checking %s {...} for more modules to load",
 624                        section_type_value[comp].section);
 625
 626                 if (load_component_section(NULL, subcs, space, comp,
 627                                            mainconfig.radiusd_conf) < 0) {
 628                         DEBUG2(" }");
 629                         return -1;
 630                 }
 631         } /* loop over components */
 632
 633         DEBUG2(" }");
 634
 635         return 0;
 636 }
 637
 638 /*
 639  *      Parse the module config sections, and load
 640  *      and call each module's init() function.
 641  *
 642  *      Libtool makes your life a LOT easier, especially with libltdl.
 643  *      see: http://www.gnu.org/software/libtool/
 644  */
 645 int setup_modules(int reload)
 646 {
 647         int             comp;
 648         CONF_SECTION    *cs, *modules;
 649         int             do_component[RLM_COMPONENT_COUNT];
 650         rad_listen_t    *listener;
 651
 652         /*
 653          *      If necessary, initialize libltdl.
 654          */
 655         if (!reload) {
 656                 /*
 657                  *      Set the default list of preloaded symbols.
 658                  *      This is used to initialize libltdl's list of
 659                  *      preloaded modules.
 660                  *
 661                  *      i.e. Static modules.
 662                  */
 663                 LTDL_SET_PRELOADED_SYMBOLS();
 664
 665                 if (lt_dlinit() != 0) {
 666                         radlog(L_ERR|L_CONS, "Failed to initialize libraries: %s\n",
 667                                         lt_dlerror());
 668                         return -1;
 669                 }
 670
 671                 /*
 672                  *      Set the search path to ONLY our library directory.
 673                  *      This prevents the modules from being found from
 674                  *      any location on the disk.
 675                  */
 676                 lt_dlsetsearchpath(radlib_dir);
 677
 678                 DEBUG2("radiusd: Library search path is %s",
 679                        lt_dlgetsearchpath());
 680
 681                 /*
 682                  *      Set up the internal module struct.
 683                  */
 684                 module_tree = rbtree_create(module_entry_cmp,
 685                                             module_entry_free, 0);
 686                 if (!module_tree) {
 687                         radlog(L_ERR|L_CONS, "Failed to initialize modules\n");
 688                         return -1;
 689                 }
 690         } else {
 691                 rbtree_free(components);
 692         }
 693
 694         components = rbtree_create(indexed_modcallable_cmp,
 695                                    indexed_modcallable_free, 0);
 696         if (!components) {
 697                 radlog(L_ERR|L_CONS, "Failed to initialize components\n");
 698                 return -1;
 699         }
 700
 701         /*
 702          *      Figure out which sections to load.
 703          */
 704         memset(do_component, 0, sizeof(do_component));
 705         for (listener = mainconfig.listen;
 706              listener != NULL;
 707              listener = listener->next) {
 708                 switch (listener->type) {
 709                 case RAD_LISTEN_AUTH:
 710                         do_component[RLM_COMPONENT_AUTZ] = 1;
 711                         do_component[RLM_COMPONENT_AUTH] = 1;
 712                         do_component[RLM_COMPONENT_POST_AUTH] = 1;
 713                         do_component[RLM_COMPONENT_SESS] = 1;
 714                         break;
 715
 716                 case RAD_LISTEN_DETAIL: /* just like acct */
 717                 case RAD_LISTEN_ACCT:
 718                         do_component[RLM_COMPONENT_PREACCT] = 1;
 719                         do_component[RLM_COMPONENT_ACCT] = 1;
 720                         break;
 721
 722                 case RAD_LISTEN_PROXY:
 723                         do_component[RLM_COMPONENT_PRE_PROXY] = 1;
 724                         do_component[RLM_COMPONENT_POST_PROXY] = 1;
 725                         break;
 726
 727                 case RAD_LISTEN_VQP:
 728                         do_component[RLM_COMPONENT_POST_AUTH] = 1;
 729                         break;
 730                         /*
 731                          *      Ignore this.
 732                          */
 733                 case RAD_LISTEN_SNMP:
 734                         break;
 735
 736                 default:
 737                         rad_assert(0 == 1);
 738                         break;
 739                 }
 740         }
 741
 742         for (comp = RLM_COMPONENT_AUTH; comp < RLM_COMPONENT_COUNT; comp++) {
 743                 /*
 744                  *      Have the debugging messages all in one place.
 745                  */
 746                 if (!do_component[comp]) {
 747                         DEBUG2("modules: Not loading %s{} section",
 748                                section_type_value[comp].section);
 749                 }
 750         }
 751
 752         /*
 753          *      Create any DICT_VALUE's for the types.  See
 754          *      'doc/configurable_failover' for examples of 'authtype'
 755          *      used to create new Auth-Type values.  In order to
 756          *      let the user create new names, we've got to look for
 757          *      those names, and create DICT_VALUE's for them.
 758          */
 759         for (comp = RLM_COMPONENT_AUTH; comp < RLM_COMPONENT_COUNT; comp++) {
 760                 int             value;
 761                 const char      *name2;
 762                 DICT_ATTR       *dattr;
 763                 DICT_VALUE      *dval;
 764                 CONF_SECTION    *sub, *next;
 765                 CONF_PAIR       *cp;
 766
 767                 /*
 768                  *      Not needed, don't load it.
 769                  */
 770                 if (!do_component[comp]) {
 771                         continue;
 772                 }
 773                 cs = cf_section_find(section_type_value[comp].section);
 774
 775                 if (!cs) continue;
 776
 777                 sub = NULL;
 778                 do {
 779                         /*
 780                          *      See if there's a sub-section by that
 781                          *      name.
 782                          */
 783                         next = cf_subsection_find_next(cs, sub,
 784                                                        section_type_value[comp].typename);
 785                         sub = next;
 786
 787                         /*
 788                          *      If so, look for it to define a new
 789                          *      value.
 790                          */
 791                         name2 = cf_section_name2(sub);
 792                         if (!name2) continue;
 793
 794
 795                         /*
 796                          *      If the value already exists, don't
 797                          *      create it again.
 798                          */
 799                         dval = dict_valbyname(section_type_value[comp].attr,
 800                                               name2);
 801                         if (dval) continue;
 802
 803                         /*
 804                          *      Find the attribute for the value.
 805                          */
 806                         dattr = dict_attrbyvalue(section_type_value[comp].attr);
 807                         if (!dattr) {
 808                                 radlog(L_ERR, "%s[%d]: No such attribute %s",
 809                                        mainconfig.radiusd_conf,
 810                                        cf_section_lineno(sub),
 811                                        section_type_value[comp].typename);
 812                                 continue;
 813                         }
 814
 815                         /*
 816                          *      Create a new unique value with a
 817                          *      meaningless number.  You can't look at
 818                          *      it from outside of this code, so it
 819                          *      doesn't matter.  The only requirement
 820                          *      is that it's unique.
 821                          */
 822                         do {
 823                                 value = lrad_rand() & 0x00ffffff;
 824                         } while (dict_valbyattr(dattr->attr, value));
 825
 826                         if (dict_addvalue(name2, dattr->name, value) < 0) {
 827                                 radlog(L_ERR, "%s", librad_errstr);
 828                                 return -1;
 829                         }
 830                 } while (sub != NULL);
 831
 832                 /*
 833                  *      Loop over the non-sub-sections, too.
 834                  */
 835                 cp = NULL;
 836                 do {
 837                         /*
 838                          *      See if there's a conf-pair by that
 839                          *      name.
 840                          */
 841                         cp = cf_pair_find_next(cs, cp, NULL);
 842                         if (!cp) break;
 843
 844
 845                         /*
 846                          *      If the value already exists, don't
 847                          *      create it again.
 848                          */
 849                         name2 = cf_pair_attr(cp);
 850                         dval = dict_valbyname(section_type_value[comp].attr,
 851                                               name2);
 852                         if (dval) continue;
 853
 854                         /*
 855                          *      Find the attribute for the value.
 856                          */
 857                         dattr = dict_attrbyvalue(section_type_value[comp].attr);
 858                         if (!dattr) {
 859                                 radlog(L_ERR, "%s[%d]: No such attribute %s",
 860                                        mainconfig.radiusd_conf,
 861                                        cf_section_lineno(sub),
 862                                        section_type_value[comp].typename);
 863                                 continue;
 864                         }
 865
 866                         /*
 867                          *      Finally, create the new attribute.
 868                          */
 869                         do {
 870                                 value = lrad_rand() & 0x00ffffff;
 871                         } while (dict_valbyattr(dattr->attr, value));
 872                         if (dict_addvalue(name2, dattr->name, value) < 0) {
 873                                 radlog(L_ERR, "%s", librad_errstr);
 874                                 return -1;
 875                         }
 876                 } while (cp != NULL);
 877         } /* over the sections which can have redundent sub-sections */
 878
 879         /*
 880          *      Remember where the modules were stored.
 881          */
 882         modules = cf_section_find("modules");
 883         if (!modules) {
 884                 radlog(L_ERR, "Cannot find a \"modules\" section in the configuration file!");
 885                 return -1;
 886         }
 887
 888         /*
 889          *  Look for the 'instantiate' section, which tells us
 890          *  the instantiation order of the modules, and also allows
 891          *  us to load modules with no authorize/authenticate/etc.
 892          *  sections.
 893          */
 894         cs = cf_section_find("instantiate");
 895         if (cs != NULL) {
 896                 CONF_ITEM *ci;
 897                 CONF_PAIR *cp;
 898                 module_instance_t *module;
 899                 const char *name;
 900
 901                 DEBUG2(" instantiate {");
 902
 903                 /*
 904                  *  Loop over the items in the 'instantiate' section.
 905                  */
 906                 for (ci=cf_item_find_next(cs, NULL);
 907                      ci != NULL;
 908                      ci=cf_item_find_next(cs, ci)) {
 909
 910                         /*
 911                          *      Skip sections.  They'll be handled
 912                          *      later, if they're referenced at all...
 913                          */
 914                         if (cf_item_is_section(ci)) {
 915                                 continue;
 916                         }
 917
 918                         cp = cf_itemtopair(ci);
 919                         name = cf_pair_attr(cp);
 920                         module = find_module_instance(modules, name);
 921                         if (!module) {
 922                                 return -1;
 923                         }
 924                 } /* loop over items in the subsection */
 925
 926                 DEBUG2(" }");
 927         } /* if there's an 'instantiate' section. */
 928
 929         if (load_byspace(mainconfig.config, NULL, do_component) < 0) {
 930                 return -1;
 931         }
 932
 933         /*
 934          *      Load by identities, and by vmps.
 935          */
 936         for (listener = mainconfig.listen;
 937              listener != NULL;
 938              listener = listener->next) {
 939                 if (listener->type == RAD_LISTEN_VQP) {
 940                         cs = cf_section_find("vmps");
 941                         if (!cs) {
 942                                 radlog(L_ERR, "Listening on vmps socket, but no vmps section");
 943                                 return -1;
 944                         }
 945
 946                         if (cf_item_find_next(cs, NULL) == NULL) {
 947                                 radlog(L_ERR, "Listening on vmps socket, vmps section is empty");
 948                                 return -1;
 949                         }
 950
 951                         DEBUG2(" Module: Checking vmps {...} for more modules to load");
 952
 953                         if (load_component_section(NULL, cs, VMPS_SPACE,
 954                                                    RLM_COMPONENT_POST_AUTH,
 955                                                    mainconfig.radiusd_conf) < 0) {
 956                                 return -1;
 957                         }
 958
 959                         continue;
 960                 }
 961
 962                 if (!listener->identity) continue;
 963
 964                 /*
 965                  *      Load by identity
 966                  */
 967                 cs = cf_section_sub_find_name2(mainconfig.config,
 968                                                "identity", listener->identity);
 969                 if (!cs) continue;
 970
 971                 DEBUG2("identity %s {", listener->identity);
 972                 if (load_byspace(cs, listener->identity, do_component) < 0) {
 973                         DEBUG2("}");
 974                         return -1;
 975                 }
 976                 DEBUG2("}");
 977         }
 978
 979         return 0;
 980 }
 981
 982 /*
 983  *      Call all authorization modules until one returns
 984  *      somethings else than RLM_MODULE_OK
 985  */
 986 int module_authorize(int autz_type, REQUEST *request)
 987 {
 988         return indexed_modcall(request->listener->identity,
 989                                RLM_COMPONENT_AUTZ, autz_type, request);
 990 }
 991
 992 /*
 993  *      Authenticate a user/password with various methods.
 994  */
 995 int module_authenticate(int auth_type, REQUEST *request)
 996 {
 997         return indexed_modcall(request->listener->identity,
 998                                RLM_COMPONENT_AUTH, auth_type, request);
 999 }
1000
1001 /*
1002  *      Do pre-accounting for ALL configured sessions
1003  */
1004 int module_preacct(REQUEST *request)
1005 {
1006         return indexed_modcall(request->listener->identity,
1007                                RLM_COMPONENT_PREACCT, 0, request);
1008 }
1009
1010 /*
1011  *      Do accounting for ALL configured sessions
1012  */
1013 int module_accounting(int acct_type, REQUEST *request)
1014 {
1015         return indexed_modcall(request->listener->identity,
1016                                RLM_COMPONENT_ACCT, acct_type, request);
1017 }
1018
1019 /*
1020  *      See if a user is already logged in.
1021  *
1022  *      Returns: 0 == OK, 1 == double logins, 2 == multilink attempt
1023  */
1024 int module_checksimul(int sess_type, REQUEST *request, int maxsimul)
1025 {
1026         int rcode;
1027
1028         if(!request->username)
1029                 return 0;
1030
1031         request->simul_count = 0;
1032         request->simul_max = maxsimul;
1033         request->simul_mpp = 1;
1034
1035         rcode = indexed_modcall(request->listener->identity,
1036                                 RLM_COMPONENT_SESS, sess_type, request);
1037
1038         if (rcode != RLM_MODULE_OK) {
1039                 /* FIXME: Good spot for a *rate-limited* warning to the log */
1040                 return 0;
1041         }
1042
1043         return (request->simul_count < maxsimul) ? 0 : request->simul_mpp;
1044 }
1045
1046 /*
1047  *      Do pre-proxying for ALL configured sessions
1048  */
1049 int module_pre_proxy(int type, REQUEST *request)
1050 {
1051         return indexed_modcall(request->listener->identity,
1052                                RLM_COMPONENT_PRE_PROXY, type, request);
1053 }
1054
1055 /*
1056  *      Do post-proxying for ALL configured sessions
1057  */
1058 int module_post_proxy(int type, REQUEST *request)
1059 {
1060         return indexed_modcall(request->listener->identity,
1061                                RLM_COMPONENT_POST_PROXY, type, request);
1062 }
1063
1064 /*
1065  *      Do post-authentication for ALL configured sessions
1066  */
1067 int module_post_auth(int postauth_type, REQUEST *request)
1068 {
1069         return indexed_modcall(request->listener->identity,
1070                                RLM_COMPONENT_POST_AUTH, postauth_type, request);
1071 }
1072
1073 /*
1074  *      Do VMPS
1075  */
1076 int module_vmps(REQUEST *request)
1077 {
1078         return indexed_modcall(VMPS_SPACE, RLM_COMPONENT_POST_AUTH, 0,
1079                                request);
1080 }