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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  * Copyright 2003  The FreeRADIUS server project
  21  * Copyright 2000  Alan DeKok <aland@ox.org>
  22  * Copyright 2000  Alan Curry <pacman@world.std.com>
  23  */
  24
  25 static const char rcsid[] = "$Id$";
  26
  27 #include "autoconf.h"
  28 #include "libradius.h"
  29
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <string.h>
  33
  34 #include "radiusd.h"
  35 #include "modpriv.h"
  36 #include "modules.h"
  37 #include "modcall.h"
  38 #include "conffile.h"
  39 #include "ltdl.h"
  40 #include "rad_assert.h"
  41
  42 /*
  43  *      Internal list of all of the modules we have loaded.
  44  */
  45 static module_list_t *module_list = NULL;
  46
  47 /*
  48  *      Internal list of each module instance.
  49  */
  50 static module_instance_t *module_instance_list = NULL;
  51
  52 typedef struct indexed_modcallable {
  53         struct indexed_modcallable *next;
  54         int idx;
  55         modcallable *modulelist;
  56 } indexed_modcallable;
  57
  58 /*
  59  *      For each component, keep an ordered list of ones to call.
  60  */
  61 static indexed_modcallable *components[RLM_COMPONENT_COUNT];
  62
  63 /*
  64  *      The component names.
  65  *
  66  *      Hmm... we probably should be getting these from the configuration
  67  *      file, too.
  68  */
  69 const char *component_names[RLM_COMPONENT_COUNT] =
  70 {
  71         "authenticate",
  72         "authorize",
  73         "preacct",
  74         "accounting",
  75         "session",
  76         "pre-proxy",
  77         "post-proxy",
  78         "post-auth"
  79 };
  80
  81 /*
  82  *      Delete ASAP.
  83  */
  84 static const char *old_subcomponent_names[RLM_COMPONENT_COUNT] =
  85 {
  86         "authtype",
  87         "autztype",
  88         "preacctype",
  89         "acctype",
  90         "sesstype",
  91         "pre-proxytype",
  92         "post-proxytype",
  93         "post-authtype"
  94 };
  95
  96 static const char *subcomponent_names[RLM_COMPONENT_COUNT] =
  97 {
  98         "Auth-Type",
  99         "Autz-Type",
 100         "Pre-Acct-Type",
 101         "Acct-Type",
 102         "Session-Type",
 103         "Pre-Proxy-Type",
 104         "Post-Proxy-Type",
 105         "Post-Auth-Type"
 106 };
 107
 108 static void indexed_modcallable_free(indexed_modcallable **cf)
 109 {
 110         indexed_modcallable     *c, *next;
 111
 112         c = *cf;
 113         while (c) {
 114                 next = c->next;
 115                 modcallable_free(&c->modulelist);
 116                 free(c);
 117                 c = next;
 118         }
 119         *cf = NULL;
 120 }
 121
 122 static void instance_list_free(module_instance_t **i)
 123 {
 124         module_instance_t       *c, *next;
 125
 126         c = *i;
 127         while (c) {
 128                 next = c->next;
 129                 if(c->entry->module->detach)
 130                         (c->entry->module->detach)(c->insthandle);
 131 #ifdef HAVE_PTHREAD_H
 132                 if (c->mutex) {
 133                         /*
 134                          *      FIXME
 135                          *      The mutex MIGHT be locked...
 136                          *      we'll check for that later, I guess.
 137                          */
 138                         pthread_mutex_destroy(c->mutex);
 139                         free(c->mutex);
 140                 }
 141 #endif
 142                 free(c);
 143                 c = next;
 144         }
 145         *i = NULL;
 146 }
 147
 148 /*
 149  *      Remove all of the modules.
 150  */
 151 int detach_modules(void)
 152 {
 153         module_list_t *ml, *next;
 154         int i;
 155
 156         /*
 157          *      Delete the internal component pointers.
 158          */
 159         for (i = 0; i < RLM_COMPONENT_COUNT; i++) {
 160                 indexed_modcallable_free(&components[i]);
 161         }
 162
 163         instance_list_free(&module_instance_list);
 164
 165         ml = module_list;
 166         while (ml) {
 167                 next = ml->next;
 168                 if (ml->module->destroy)
 169                         (ml->module->destroy)();
 170                 lt_dlclose(ml->handle); /* ignore any errors */
 171                 free(ml);
 172                 ml = next;
 173         }
 174
 175         module_list = NULL;
 176
 177         return 0;
 178 }
 179
 180 /*
 181  *      Find a module on disk or in memory, and link to it.
 182  */
 183 static module_list_t *linkto_module(const char *module_name,
 184                 const char *cffilename, int cflineno)
 185 {
 186         module_list_t *node;
 187         lt_dlhandle handle;
 188         char module_struct[256];
 189         char *p;
 190
 191         /*
 192          *      Look through the global module library list for the
 193          *      named module.
 194          */
 195         for (node = module_list; node != NULL; node = node->next) {
 196                 /*
 197                  *      Found the named module.  Return it.
 198                  */
 199                 if (strcmp(node->name, module_name) == 0)
 200                         return node;
 201
 202         }
 203
 204         /*
 205          *      Keep the handle around so we can dlclose() it.
 206          */
 207         handle = lt_dlopenext(module_name);
 208         if (handle == NULL) {
 209                 radlog(L_ERR|L_CONS, "%s[%d] Failed to link to module '%s':"
 210                                 " %s\n", cffilename, cflineno, module_name, lt_dlerror());
 211                 return NULL;
 212         }
 213
 214         /* make room for the module type */
 215         node = (module_list_t *) rad_malloc(sizeof(module_list_t));
 216
 217         /* fill in the module structure */
 218         node->next = NULL;
 219         node->handle = handle;
 220         strNcpy(node->name, module_name, sizeof(node->name));
 221
 222         /*
 223          *      Link to the module's rlm_FOO{} module structure.
 224          */
 225         /* module_name has the version embedded; strip it. */
 226         strcpy(module_struct, module_name);
 227         p = strrchr(module_struct, '-');
 228         if (p)
 229                 *p = '\0';
 230         node->module = (module_t *) lt_dlsym(node->handle, module_struct);
 231         if (!node->module) {
 232                 radlog(L_ERR|L_CONS, "%s[%d] Failed linking to "
 233                                 "%s structure in %s: %s\n",
 234                                 cffilename, cflineno,
 235                                 module_name, cffilename, lt_dlerror());
 236                 lt_dlclose(node->handle);       /* ignore any errors */
 237                 free(node);
 238                 return NULL;
 239         }
 240
 241         /* call the modules initialization */
 242         if (node->module->init && (node->module->init)() < 0) {
 243                 radlog(L_ERR|L_CONS, "%s[%d] Module initialization failed.\n",
 244                                 cffilename, cflineno);
 245                 lt_dlclose(node->handle);       /* ignore any errors */
 246                 free(node);
 247                 return NULL;
 248         }
 249
 250         DEBUG("Module: Loaded %s ", node->module->name);
 251
 252         node->next = module_list;
 253         module_list = node;
 254
 255         return node;
 256 }
 257
 258 /*
 259  *      Find a module instance.
 260  */
 261 module_instance_t *find_module_instance(const char *instname)
 262 {
 263         CONF_SECTION *cs, *inst_cs;
 264         const char *name1, *name2;
 265         module_instance_t *node, **last;
 266         char module_name[256];
 267
 268         /*
 269          *      Look through the global module instance list for the
 270          *      named module.
 271          */
 272         last = &module_instance_list;
 273         for (node = module_instance_list; node != NULL; node = node->next) {
 274                 /*
 275                  *      Found the named instance.  Return it.
 276                  */
 277                 if (strcmp(node->name, instname) == 0)
 278                         return node;
 279
 280                 /*
 281                  *      Keep a pointer to the last entry to update...
 282                  */
 283                 last = &node->next;
 284         }
 285
 286         /*
 287          *      Instance doesn't exist yet. Try to find the
 288          *      corresponding configuration section and create it.
 289          */
 290
 291         /*
 292          *      Look for the 'modules' configuration section.
 293          */
 294         cs = cf_section_find("modules");
 295         if (cs == NULL) {
 296                 radlog(L_ERR|L_CONS, "ERROR: Cannot find a 'modules' section in the configuration file.\n");
 297                 return NULL;
 298         }
 299
 300         /*
 301          *      Module instances are declared in the modules{} block
 302          *      and referenced later by their name, which is the
 303          *      name2 from the config section, or name1 if there was
 304          *      no name2.
 305          */
 306         name1 = name2 = NULL;
 307         for(inst_cs=cf_subsection_find_next(cs, NULL, NULL);
 308                         inst_cs != NULL;
 309                         inst_cs=cf_subsection_find_next(cs, inst_cs, NULL)) {
 310                 name1 = cf_section_name1(inst_cs);
 311                 name2 = cf_section_name2(inst_cs);
 312                 if ( (name2 && !strcmp(name2, instname)) ||
 313                      (!name2 && !strcmp(name1, instname)) )
 314                         break;
 315         }
 316         if (inst_cs == NULL) {
 317                 radlog(L_ERR|L_CONS, "ERROR: Cannot find a configuration entry for module \"%s\".\n", instname);
 318                 return NULL;
 319         }
 320
 321         /*
 322          *      Found the configuration entry.
 323          */
 324         node = rad_malloc(sizeof(*node));
 325         node->next = NULL;
 326         node->insthandle = NULL;
 327
 328         /*
 329          *      Link to the module by name: rlm_FOO-major.minor
 330          */
 331         if (strncmp(name1, "rlm_", 4)) {
 332 #if 0
 333                 snprintf(module_name, sizeof(module_name), "rlm_%s-%d.%d",
 334                          name1, RADIUSD_MAJOR_VERSION, RADIUSD_MINOR_VERSION);
 335 #else
 336                 snprintf(module_name, sizeof(module_name), "rlm_%s",
 337                          name1);
 338 #endif
 339         } else {
 340                 strNcpy(module_name, name1, sizeof(module_name));
 341
 342         }
 343
 344         /*
 345          *  FIXME: "radiusd.conf" is wrong here; must find cf filename
 346          */
 347         node->entry = linkto_module(module_name, "radiusd.conf",
 348                                     cf_section_lineno(inst_cs));
 349         if (!node->entry) {
 350                 free(node);
 351                 /* linkto_module logs any errors */
 352                 return NULL;
 353         }
 354
 355         /*
 356          *      Call the module's instantiation routine.
 357          */
 358         if ((node->entry->module->instantiate) &&
 359             ((node->entry->module->instantiate)(inst_cs,
 360                         &node->insthandle) < 0)) {
 361                 radlog(L_ERR|L_CONS,
 362                                 "radiusd.conf[%d]: %s: Module instantiation failed.\n",
 363                                 cf_section_lineno(inst_cs), instname);
 364                 free(node);
 365                 return NULL;
 366         }
 367
 368         /*
 369          *      We're done.  Fill in the rest of the data structure,
 370          *      and link it to the module instance list.
 371          */
 372         strNcpy(node->name, instname, sizeof(node->name));
 373
 374 #ifdef HAVE_PTHREAD_H
 375         /*
 376          *      If we're threaded, check if the module is thread-safe.
 377          *
 378          *      If it isn't, we create a mutex.
 379          */
 380         if ((node->entry->module->type & RLM_TYPE_THREAD_UNSAFE) != 0) {
 381                 node->mutex = (pthread_mutex_t *) rad_malloc(sizeof(pthread_mutex_t));
 382                 /*
 383                  *      Initialize the mutex.
 384                  */
 385                 pthread_mutex_init(node->mutex, NULL);
 386         } else {
 387                 /*
 388                  *      The module is thread-safe.  Don't give it a mutex.
 389                  */
 390                 node->mutex = NULL;
 391         }
 392
 393 #endif
 394         *last = node;
 395
 396         DEBUG("Module: Instantiated %s (%s) ", name1, node->name);
 397
 398         return node;
 399 }
 400
 401 static indexed_modcallable *lookup_by_index(indexed_modcallable *head, int idx)
 402 {
 403         indexed_modcallable *p;
 404
 405         for (p = head; p != NULL; p = p->next) {
 406                 if( p->idx == idx)
 407                         return p;
 408         }
 409         return NULL;
 410 }
 411
 412 static indexed_modcallable *new_sublist(int comp, int idx)
 413 {
 414         indexed_modcallable **head = &components[comp];
 415         indexed_modcallable *node = *head;
 416         indexed_modcallable **last = head;
 417
 418         while (node) {
 419                 /* It is an error to try to create a sublist that already
 420                  * exists. It would almost certainly be caused by accidental
 421                  * duplication in the config file.
 422                  *
 423                  * index 0 is the exception, because it is used when we want
 424                  * to collect _all_ listed modules under a single index by
 425                  * default, which is currently the case in all components
 426                  * except authenticate. */
 427                 if (node->idx == idx) {
 428                         if (idx == 0)
 429                                 return node;
 430                         else
 431                                 return NULL;
 432                 }
 433                 last = &node->next;
 434                 node = node->next;
 435         }
 436
 437         node = rad_malloc(sizeof *node);
 438         node->next = NULL;
 439         node->modulelist = NULL;
 440         node->idx = idx;
 441         *last = node;
 442         return node;
 443 }
 444
 445 static int indexed_modcall(int comp, int idx, REQUEST *request)
 446 {
 447         indexed_modcallable *this;
 448
 449         this = lookup_by_index(components[comp], idx);
 450         if (!this) {
 451                 if (idx != 0) DEBUG2("  ERROR: Unknown value specified for %s.  Cannot perform requested action.",
 452                                      subcomponent_names[comp]);
 453                 /* Return a default value appropriate for the component */
 454                 switch(comp) {
 455                         case RLM_COMPONENT_AUTZ:    return RLM_MODULE_NOTFOUND;
 456                         case RLM_COMPONENT_AUTH:    return RLM_MODULE_REJECT;
 457                         case RLM_COMPONENT_PREACCT: return RLM_MODULE_NOOP;
 458                         case RLM_COMPONENT_ACCT:    return RLM_MODULE_NOOP;
 459                         case RLM_COMPONENT_SESS:    return RLM_MODULE_FAIL;
 460                         case RLM_COMPONENT_PRE_PROXY:  return RLM_MODULE_NOOP;
 461                         case RLM_COMPONENT_POST_PROXY: return RLM_MODULE_NOOP;
 462                         case RLM_COMPONENT_POST_AUTH:  return RLM_MODULE_NOOP;
 463                         default:                    return RLM_MODULE_FAIL;
 464                 }
 465         }
 466
 467         DEBUG2("  Processing the %s section of radiusd.conf",
 468                component_names[comp]);
 469         return modcall(comp, this->modulelist, request);
 470 }
 471
 472 /* Load a flat module list, as found inside an authtype{} block */
 473 static int load_subcomponent_section(CONF_SECTION *cs, int comp,
 474                                       const char *filename)
 475 {
 476         int idx;
 477         indexed_modcallable *subcomp;
 478         modcallable *ml;
 479         DICT_VALUE *dval;
 480
 481         static int meaningless_counter = 1;
 482
 483         ml = compile_modgroup(comp, cs, filename);
 484         if (!ml) {
 485                 return 0;
 486         }
 487
 488         /* We must assign a numeric index to this subcomponent. For
 489          * auth, it is generated and placed in the dictionary by
 490          * new_sectiontype_value(). The others are just numbers that are pulled
 491          * out of thin air, and the names are neither put into the dictionary
 492          * nor checked for uniqueness, but all that could be fixed in a few
 493          * minutes, if anyone finds a real use for indexed config of
 494          * components other than auth. */
 495         dval = NULL;
 496         if (comp==RLM_COMPONENT_AUTH) {
 497                 dval = dict_valbyname(PW_AUTH_TYPE, cf_section_name2(cs));
 498         } else if (comp == RLM_COMPONENT_AUTZ) {
 499                 dval = dict_valbyname(PW_AUTZ_TYPE, cf_section_name2(cs));
 500         } else if (comp == RLM_COMPONENT_ACCT) {
 501                 dval = dict_valbyname(PW_ACCT_TYPE, cf_section_name2(cs));
 502         } else if (comp == RLM_COMPONENT_SESS) {
 503                 dval = dict_valbyname(PW_SESSION_TYPE, cf_section_name2(cs));
 504         } else if (comp == RLM_COMPONENT_PRE_PROXY) {
 505                 dval = dict_valbyname(PW_PRE_PROXY_TYPE, cf_section_name2(cs));
 506         } else if (comp == RLM_COMPONENT_POST_PROXY) {
 507                 dval = dict_valbyname(PW_POST_PROXY_TYPE, cf_section_name2(cs));
 508         } else if (comp == RLM_COMPONENT_POST_AUTH) {
 509                 dval = dict_valbyname(PW_POST_AUTH_TYPE, cf_section_name2(cs));
 510         }
 511
 512         if (dval) {
 513                 idx = dval->value;
 514         } else {
 515                 idx = meaningless_counter++;
 516         }
 517
 518         subcomp = new_sublist(comp, idx);
 519         if (!subcomp) {
 520                 radlog(L_ERR|L_CONS,
 521                                 "%s[%d] %s %s already configured - skipping",
 522                                 filename, cf_section_lineno(cs),
 523                                 subcomponent_names[comp], cf_section_name2(cs));
 524                 modcallable_free(&ml);
 525                 return 1;
 526         }
 527
 528         subcomp->modulelist = ml;
 529
 530         return 1;
 531 }
 532
 533 static int load_component_section(CONF_SECTION *cs, int comp,
 534                                   const char *filename)
 535 {
 536         modcallable *this;
 537         CONF_ITEM *modref;
 538         int idx;
 539         indexed_modcallable *subcomp;
 540         const char *modname;
 541         char *visiblename;
 542
 543         for (modref=cf_item_find_next(cs, NULL);
 544                         modref != NULL;
 545                         modref=cf_item_find_next(cs, modref)) {
 546                 CONF_PAIR *cp = NULL;
 547                 CONF_SECTION *scs = NULL;
 548
 549                 if (cf_item_is_section(modref)) {
 550                         const char *sec_name;
 551                         scs = cf_itemtosection(modref);
 552
 553                         sec_name = cf_section_name1(scs);
 554
 555                         if (strcmp(sec_name,
 556                                    subcomponent_names[comp]) == 0) {
 557                                 if (!load_subcomponent_section(scs, comp,
 558                                                                filename)) {
 559                                         return -1; /* FIXME: memleak? */
 560                                 }
 561                                 continue;
 562                         }
 563
 564                         /*
 565                          *      Allow old names, too.
 566                          */
 567                         if (strcmp(sec_name,
 568                                    old_subcomponent_names[comp]) == 0) {
 569                                 if (!load_subcomponent_section(scs, comp,
 570                                                                filename)) {
 571                                         return -1; /* FIXME: memleak? */
 572                                 }
 573                                 continue;
 574                         }
 575                         cp = NULL;
 576                 } else {
 577                         cp = cf_itemtopair(modref);
 578                 }
 579
 580                 this = compile_modsingle(comp, modref, filename, &modname);
 581                 if (!this) {
 582                         radlog(L_ERR|L_CONS,
 583                                "%s[%d] Failed to parse %s section.\n",
 584                                filename, cf_section_lineno(cs),
 585                                cf_section_name1(cs));
 586                         return -1;
 587                 }
 588
 589                 if (comp == RLM_COMPONENT_AUTH) {
 590                         DICT_VALUE *dval;
 591                         const char *modrefname = NULL;
 592
 593                         if (cp) {
 594                                 modrefname = cf_pair_attr(cp);
 595                         } else {
 596                                 modrefname = cf_section_name2(scs);
 597                                 if (!modrefname) {
 598                                         radlog(L_ERR|L_CONS,
 599                                                "%s[%d] Failed to parse %s sub-section.\n",
 600                                                filename, cf_section_lineno(scs),
 601                                                cf_section_name1(scs));
 602                                         return -1;
 603                                 }
 604                         }
 605
 606                         dval = dict_valbyname(PW_AUTH_TYPE, modrefname);
 607                         if (!dval) {
 608                                 /*
 609                                  *      It's a section, but nothing we
 610                                  *      recognize.  Die!
 611                                  */
 612                                 radlog(L_ERR|L_CONS, "%s[%d] Unknown Auth-Type \"%s\" in %s section.",
 613                                        filename, cf_section_lineno(scs),
 614                                        modrefname, component_names[comp]);
 615                                 return -1;
 616                         }
 617                         idx = dval->value;
 618                 } else {
 619                         /* See the comment in new_sublist() for explanation
 620                          * of the special index 0 */
 621                         idx = 0;
 622                 }
 623
 624                 subcomp = new_sublist(comp, idx);
 625                 if (subcomp == NULL) {
 626                         radlog(L_INFO|L_CONS,
 627                                         "%s %s %s already configured - skipping",
 628                                         filename, subcomponent_names[comp],
 629                                         modname);
 630                         modcallable_free(&this);
 631                         continue;
 632                 }
 633
 634                 /* If subcomp->modulelist is NULL, add_to_modcallable will
 635                  * create it */
 636                 visiblename = cf_section_name2(cs);
 637                 if (visiblename == NULL)
 638                         visiblename = cf_section_name1(cs);
 639                 add_to_modcallable(&subcomp->modulelist, this,
 640                                 comp, visiblename);
 641         }
 642
 643         return 0;
 644 }
 645
 646 typedef struct section_type_value_t {
 647         const char      *section;
 648         const char      *typename;
 649         int             attr;
 650 } section_type_value_t;
 651
 652 static const section_type_value_t section_type_value[] = {
 653         { "authorize",    "Autz-Type",       PW_AUTZ_TYPE },
 654         { "authenticate", "Auth-Type",       PW_AUTH_TYPE },
 655         { "accounting",   "Acct-Type",       PW_ACCT_TYPE },
 656         { "session",      "Session-Type",    PW_SESSION_TYPE },
 657         { "post-auth",    "Post-Auth-Type",  PW_POST_AUTH_TYPE },
 658         { "preacct",      "Pre-Acct-Type",   PW_PRE_ACCT_TYPE },
 659         { "post-proxy",   "Post-Proxy-Type", PW_POST_PROXY_TYPE },
 660         { "pre-proxy",    "Pre-Proxy-Type",  PW_PRE_PROXY_TYPE },
 661         { NULL, NULL, 0 }
 662 };
 663
 664 /*
 665  *      Delete ASAP.
 666  */
 667 static const section_type_value_t old_section_type_value[] = {
 668         { "authorize",    "autztype", PW_AUTZ_TYPE },
 669         { "authenticate", "authtype", PW_AUTH_TYPE },
 670         { "accounting",   "acctype", PW_ACCT_TYPE },
 671         { "session",      "sesstype", PW_SESSION_TYPE },
 672         { "post-auth",    "post-authtype", PW_POST_AUTH_TYPE },
 673         { NULL, NULL, 0 }
 674 };
 675
 676 /*
 677  *      Parse the module config sections, and load
 678  *      and call each module's init() function.
 679  *
 680  *      Libtool makes your life a LOT easier, especially with libltdl.
 681  *      see: http://www.gnu.org/software/libtool/
 682  */
 683 int setup_modules(void)
 684 {
 685         int comp;
 686         CONF_SECTION *cs;
 687
 688         /*
 689          *  FIXME: This should be pulled from somewhere else.
 690          */
 691         const char *filename="radiusd.conf";
 692
 693         /*
 694          *      No current list of modules: Go initialize libltdl.
 695          */
 696         if (!module_list) {
 697                 /*
 698                  *      Set the default list of preloaded symbols.
 699                  *      This is used to initialize libltdl's list of
 700                  *      preloaded modules.
 701                  *
 702                  *      i.e. Static modules.
 703                  */
 704                 LTDL_SET_PRELOADED_SYMBOLS();
 705
 706                 if (lt_dlinit() != 0) {
 707                         radlog(L_ERR|L_CONS, "Failed to initialize libraries: %s\n",
 708                                         lt_dlerror());
 709                         exit(1); /* FIXME */
 710
 711                 }
 712
 713                 /*
 714                  *      Set the search path to ONLY our library directory.
 715                  *      This prevents the modules from being found from
 716                  *      any location on the disk.
 717                  */
 718                 lt_dlsetsearchpath(radlib_dir);
 719
 720                 DEBUG2("Module: Library search path is %s",
 721                                 lt_dlgetsearchpath());
 722
 723                 /*
 724                  *      Initialize the components.
 725                  */
 726                 for (comp = 0; comp < RLM_COMPONENT_COUNT; comp++) {
 727                         components[comp] = NULL;
 728                 }
 729
 730         } else {
 731                 detach_modules();
 732         }
 733
 734         /*
 735          *      Create any DICT_VALUE's for the types.  See
 736          *      'doc/configurable_failover' for examples of 'authtype'
 737          *      used to create new Auth-Type values.  In order to
 738          *      let the user create new names, we've got to look for
 739          *      those names, and create DICT_VALUE's for them.
 740          */
 741         for (comp = 0; section_type_value[comp].section != NULL; comp++) {
 742                 const char      *name2;
 743                 DICT_ATTR       *dattr;
 744                 DICT_VALUE      *dval;
 745                 CONF_SECTION    *sub, *next;
 746                 CONF_PAIR       *cp;
 747
 748                 /*
 749                  *  Big-time YUCK
 750                  */
 751                 static int my_value = 32767;
 752
 753                 cs = cf_section_find(section_type_value[comp].section);
 754
 755                 if (!cs) continue;
 756
 757                 sub = NULL;
 758                 do {
 759                         /*
 760                          *      See if there's a sub-section by that
 761                          *      name.
 762                          */
 763                         next = cf_subsection_find_next(cs, sub,
 764                                                       section_type_value[comp].typename);
 765
 766                         /*
 767                          *      Allow some old names, too.
 768                          */
 769                         if (!next && (comp <= 4)) {
 770
 771                                 next = cf_subsection_find_next(cs, sub,
 772                                                                old_section_type_value[comp].typename);
 773                         }
 774                         sub = next;
 775
 776                         /*
 777                          *      If so, look for it to define a new
 778                          *      value.
 779                          */
 780                         name2 = cf_section_name2(sub);
 781                         if (!name2) continue;
 782
 783
 784                         /*
 785                          *      If the value already exists, don't
 786                          *      create it again.
 787                          */
 788                         dval = dict_valbyname(section_type_value[comp].attr,
 789                                               name2);
 790                         if (dval) continue;
 791
 792                         /*
 793                          *      Find the attribute for the value.
 794                          */
 795                         dattr = dict_attrbyvalue(section_type_value[comp].attr);
 796                         if (!dattr) continue;
 797
 798                         /*
 799                          *      Finally, create the new attribute.
 800                          */
 801                         if (dict_addvalue(name2, dattr->name, my_value++) < 0) {
 802                                 radlog(L_ERR, "%s", librad_errstr);
 803                                 exit(1);
 804                         }
 805                 } while (sub != NULL);
 806
 807                 /*
 808                  *      Loop over the non-sub-sections, too.
 809                  */
 810                 cp = NULL;
 811                 do {
 812                         /*
 813                          *      See if there's a conf-pair by that
 814                          *      name.
 815                          */
 816                         cp = cf_pair_find_next(cs, cp, NULL);
 817                         if (!cp) break;
 818
 819
 820                         /*
 821                          *      If the value already exists, don't
 822                          *      create it again.
 823                          */
 824                         name2 = cf_pair_attr(cp);
 825                         dval = dict_valbyname(section_type_value[comp].attr,
 826                                               name2);
 827                         if (dval) continue;
 828
 829                         /*
 830                          *      Find the attribute for the value.
 831                          */
 832                         dattr = dict_attrbyvalue(section_type_value[comp].attr);
 833                         if (!dattr) continue;
 834
 835                         /*
 836                          *      Finally, create the new attribute.
 837                          */
 838                         if (dict_addvalue(name2, dattr->name, my_value++) < 0) {
 839                                 radlog(L_ERR, "%s", librad_errstr);
 840                                 exit(1);
 841                         }
 842                 } while (cp != NULL);
 843         } /* over the sections which can have redundent sub-sections */
 844
 845         /*
 846          *  Look for the 'instantiate' section, which tells us
 847          *  the instantiation order of the modules, and also allows
 848          *  us to load modules with no authorize/authenticate/etc.
 849          *  sections.
 850          */
 851         cs = cf_section_find("instantiate");
 852         if (cs != NULL) {
 853                 CONF_ITEM *ci;
 854                 CONF_PAIR *cp;
 855                 module_instance_t *module;
 856                 const char *name;
 857
 858                 /*
 859                  *  Loop over the items in the 'instantiate' section.
 860                  */
 861                 for (ci=cf_item_find_next(cs, NULL);
 862                      ci != NULL;
 863                      ci=cf_item_find_next(cs, ci)) {
 864
 865                         if (cf_item_is_section(ci)) {
 866                                 radlog(L_ERR|L_CONS,
 867                                        "%s[%d] Subsection for module instantiate is not allowed\n", filename,
 868
 869                                        cf_section_lineno(cf_itemtosection(ci)));
 870                                 exit(1);
 871                         }
 872
 873                         cp = cf_itemtopair(ci);
 874                         name = cf_pair_attr(cp);
 875                         module = find_module_instance(name);
 876                         if (!module) {
 877                                 exit(1);
 878                         }
 879                 } /* loop over items in the subsection */
 880         } /* if there's an 'instantiate' section. */
 881
 882         /*
 883          *      Loop over all of the known components, finding their
 884          *      configuration section, and loading it.
 885          */
 886         for (comp = 0; comp < RLM_COMPONENT_COUNT; ++comp) {
 887                 cs = cf_section_find(component_names[comp]);
 888                 if (cs == NULL)
 889                         continue;
 890
 891                 if (load_component_section(cs, comp, filename) < 0) {
 892                         exit(1);
 893                 }
 894         }
 895
 896         return 0;
 897 }
 898
 899 /*
 900  *      Call all authorization modules until one returns
 901  *      somethings else than RLM_MODULE_OK
 902  */
 903 int module_authorize(int autz_type, REQUEST *request)
 904 {
 905         /*
 906          *      We have a proxied packet, and we've been told
 907          *      to NOT pass proxied packets through 'authorize'
 908          *      a second time.  So stop.
 909          */
 910         if ((request->proxy != NULL &&
 911              mainconfig.post_proxy_authorize == FALSE)) {
 912                 DEBUG2(" authorize: Skipping authorize in post-proxy stage");
 913                 return RLM_MODULE_NOOP;
 914         }
 915
 916         return indexed_modcall(RLM_COMPONENT_AUTZ, autz_type, request);
 917 }
 918
 919 /*
 920  *      Authenticate a user/password with various methods.
 921  */
 922 int module_authenticate(int auth_type, REQUEST *request)
 923 {
 924         return indexed_modcall(RLM_COMPONENT_AUTH, auth_type, request);
 925 }
 926
 927 /*
 928  *      Do pre-accounting for ALL configured sessions
 929  */
 930 int module_preacct(REQUEST *request)
 931 {
 932         return indexed_modcall(RLM_COMPONENT_PREACCT, 0, request);
 933 }
 934
 935 /*
 936  *      Do accounting for ALL configured sessions
 937  */
 938 int module_accounting(int acct_type, REQUEST *request)
 939 {
 940         return indexed_modcall(RLM_COMPONENT_ACCT, acct_type, request);
 941 }
 942
 943 /*
 944  *      See if a user is already logged in.
 945  *
 946  *      Returns: 0 == OK, 1 == double logins, 2 == multilink attempt
 947  */
 948 int module_checksimul(int sess_type, REQUEST *request, int maxsimul)
 949 {
 950         int rcode;
 951
 952         if(!components[RLM_COMPONENT_SESS])
 953                 return 0;
 954
 955         if(!request->username)
 956                 return 0;
 957
 958         request->simul_count = 0;
 959         request->simul_max = maxsimul;
 960         request->simul_mpp = 1;
 961
 962         rcode = indexed_modcall(RLM_COMPONENT_SESS, sess_type, request);
 963
 964         if (rcode != RLM_MODULE_OK) {
 965                 /* FIXME: Good spot for a *rate-limited* warning to the log */
 966                 return 0;
 967         }
 968
 969         return (request->simul_count < maxsimul) ? 0 : request->simul_mpp;
 970 }
 971
 972 /*
 973  *      Do pre-proxying for ALL configured sessions
 974  */
 975 int module_pre_proxy(int type, REQUEST *request)
 976 {
 977         return indexed_modcall(RLM_COMPONENT_PRE_PROXY, type, request);
 978 }
 979
 980 /*
 981  *      Do post-proxying for ALL configured sessions
 982  */
 983 int module_post_proxy(int type, REQUEST *request)
 984 {
 985         return indexed_modcall(RLM_COMPONENT_POST_PROXY, type, request);
 986 }
 987
 988 /*
 989  *      Do post-authentication for ALL configured sessions
 990  */
 991 int module_post_auth(int postauth_type, REQUEST *request)
 992 {
 993         return indexed_modcall(RLM_COMPONENT_POST_AUTH, postauth_type, request);
 994 }
 995