src/modules/rlm_fastusers/rlm_fastusers.c

   1 /*
   2  * rlm_fastusers.c      authorization: Find a user in the hashed "users" file.
   3  *                      accounting:    Do nothing.  Auth module only.
   4  *
   5  * Version:     $Id$
   6  *
   7  *   This program is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU General Public License as published by
   9  *   the Free Software Foundation; either version 2 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This program is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with this program; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  * Copyright 2000  The FreeRADIUS server project
  22  * Copyright 2000  Jeff Carneal <jeff@apex.net>
  23  */
  24
  25 #include        "autoconf.h"
  26 #include        "libradius.h"
  27
  28 #include        <sys/socket.h>
  29 #include        <sys/time.h>
  30 #include        <sys/stat.h>
  31
  32 #include        <stdio.h>
  33 #include        <stdlib.h>
  34 #include        <string.h>
  35 #include        <pwd.h>
  36 #include        <grp.h>
  37 #include        <ctype.h>
  38 #include        <fcntl.h>
  39 #include        <limits.h>
  40
  41 #include        "radiusd.h"
  42 #include        "modules.h"
  43
  44 struct fastuser_instance {
  45         char *compat_mode;
  46         int hash_reload;
  47
  48         /* hash table */
  49         long hashsize;
  50         PAIR_LIST **hashtable;
  51         PAIR_LIST *defaults;
  52         PAIR_LIST *acctusers;
  53         int stats;
  54
  55         char *usersfile;
  56         char *acctusersfile;
  57         time_t next_reload;
  58         time_t lastusersload;
  59         time_t lastacctusersload;
  60 };
  61
  62 /* Function declarations */
  63 static int fallthrough(VALUE_PAIR *vp);
  64 static int fastuser_buildhash(struct fastuser_instance *inst);
  65 static int fastuser_getfile(struct fastuser_instance *inst, const char *filename,
  66                                                                                                                 PAIR_LIST **default_list, PAIR_LIST **pair_list,
  67                                                                                                                 int isacctfile);
  68 static int fastuser_hash(const char *s, long hashtablesize);
  69 static int fastuser_store(PAIR_LIST **hashtable, PAIR_LIST *entry, int idx);
  70 static PAIR_LIST *fastuser_find(REQUEST *request, PAIR_LIST *user,
  71                                                                                                                                 const char *username);
  72 static void fastuser_tablestats(PAIR_LIST **hashtable, long size);
  73 static int fastuser_passcheck(REQUEST *request, PAIR_LIST *user, const char *name);
  74
  75 static CONF_PARSER module_config[] = {
  76         { "usersfile",     PW_TYPE_STRING_PTR,
  77           offsetof(struct fastuser_instance,usersfile), NULL, "${raddbdir}/users_fast" },
  78         { "acctusersfile",     PW_TYPE_STRING_PTR,
  79           offsetof(struct fastuser_instance,acctusersfile), NULL, "${raddbdir}/acct_users" },
  80         { "hashsize",     PW_TYPE_INTEGER,
  81           offsetof(struct fastuser_instance,hashsize), NULL, "100000" },
  82         { "stats",     PW_TYPE_BOOLEAN,
  83           offsetof(struct fastuser_instance,stats), NULL, "no" },
  84         { "compat",        PW_TYPE_STRING_PTR,
  85           offsetof(struct fastuser_instance,compat_mode), NULL, "cistron" },
  86         { "hash_reload",     PW_TYPE_INTEGER,
  87           offsetof(struct fastuser_instance,hash_reload), NULL, "600" },
  88         { NULL, -1, 0, NULL, NULL }
  89 };
  90
  91 /*
  92  * See if a VALUE_PAIR list contains Fall-Through = Yes
  93  */
  94 static int fallthrough(VALUE_PAIR *vp)
  95 {
  96         VALUE_PAIR *tmp;
  97         tmp = pairfind(vp, PW_FALL_THROUGH);
  98         return tmp ? tmp->lvalue : 0;
  99 }
 100
 101 /*
 102  *       returncheck - Check for Auth-Type = Reject and return appropriate
 103  *                     module return code if it is found.
 104  */
 105 static int rad_check_return(VALUE_PAIR *list)
 106 {
 107       VALUE_PAIR      *authtype;
 108
 109       /*
 110        * We check for Auth-Type = Reject here
 111        */
 112
 113       authtype = pairfind(list, PW_AUTHTYPE);
 114       if((authtype) && authtype->lvalue == PW_AUTHTYPE_REJECT)  {
 115               DEBUG2("rad_check_return:  Auth-Type is Reject");
 116               return RLM_MODULE_REJECT;
 117       }
 118
 119       return RLM_MODULE_UPDATED;
 120 }
 121
 122 static int fastuser_buildhash(struct fastuser_instance *inst) {
 123         long memsize=0;
 124         int rcode, hashindex;
 125         PAIR_LIST **newhash=NULL, **oldhash=NULL;
 126         PAIR_LIST *newdefaults=NULL, *newacctusers, *cur=NULL;
 127         PAIR_LIST *olddefaults=NULL, *oldacctusers=NULL;
 128         struct stat statbuf;
 129         int reloadusers = 1;
 130         int reloadacctusers = 1;
 131
 132         /*
 133          * Allocate space for hash table here
 134          */
 135         memsize = sizeof(PAIR_LIST *) * inst->hashsize;
 136
 137         newhash = (PAIR_LIST **) rad_malloc(memsize);
 138
 139         memset((PAIR_LIST *)newhash, 0, memsize);
 140
 141         /* Check acct_users last modification time */
 142         if ((stat(inst->acctusersfile, &statbuf) != -1)
 143          && (statbuf.st_mtime <= inst->lastacctusersload)) {
 144                 DEBUG2("rlm_fastusers:  File %s was unchanged. Not reloading.",
 145                         inst->acctusersfile);
 146                 reloadacctusers = 0;
 147                 rcode = 0;
 148         }
 149         else
 150         /* Read acct_users */
 151         rcode = fastuser_getfile(inst, inst->acctusersfile, NULL, &newacctusers, 1);
 152
 153         if (rcode != 0) {
 154                 radlog(L_ERR|L_CONS, "rlm_fastusers:  Errors reading %s", inst->usersfile);
 155                 return -1;
 156         }
 157
 158         /* Check users last modification time */
 159         if ((stat(inst->usersfile, &statbuf) != -1)
 160          && (statbuf.st_mtime <= inst->lastusersload)) {
 161                 DEBUG2("rlm_fastusers:  File %s was unchanged. Not reloading.",
 162                         inst->usersfile);
 163                 reloadusers = 0;
 164                 rcode = 0;
 165                 /* This was allocated earlier but will remain unused */
 166                 free(newhash);
 167         }
 168         else
 169         /* Read users */
 170         rcode = fastuser_getfile(inst, inst->usersfile, &newdefaults, newhash, 0);
 171
 172         if (rcode != 0) {
 173                 radlog(L_ERR|L_CONS, "rlm_fastusers:  Errors reading %s", inst->usersfile);
 174                 return -1;
 175         }
 176
 177         if (reloadusers) {
 178                 /*
 179                  * We need to do this now so that users auths
 180                  * aren't blocked while we free the old table
 181                  * below
 182                  */
 183                 inst->lastusersload = time(NULL);
 184                 oldhash = inst->hashtable;
 185                 inst->hashtable = newhash;
 186                 olddefaults = inst->defaults;
 187                 inst->defaults = newdefaults;
 188
 189                 /*
 190                  * When we get here, we assume the hash built properly.
 191                  * So we begin to tear down the old one
 192                  */
 193                 if (oldhash) {
 194                         for(hashindex=0; hashindex<inst->hashsize; hashindex++) {
 195                                 if(oldhash[hashindex]) {
 196                                         cur = oldhash[hashindex];
 197                                         pairlist_free(&cur);
 198                                 }
 199                         }
 200                         free(oldhash);
 201                 }
 202                 pairlist_free(&olddefaults);
 203         }
 204         if (reloadacctusers) {
 205                 inst->lastacctusersload = time(NULL);
 206                 oldacctusers = inst->acctusers;
 207                 inst->acctusers = newacctusers;
 208                 pairlist_free(&oldacctusers);
 209         }
 210
 211         if(inst->stats)
 212                 fastuser_tablestats(inst->hashtable, inst->hashsize);
 213
 214         return 0;
 215 }
 216
 217 static int fastuser_getfile(struct fastuser_instance *inst, const char *filename,
 218                                                                                                                 PAIR_LIST **default_list, PAIR_LIST **pair_list,
 219                                                                                                                 int isacctfile) {
 220         int rcode;
 221         PAIR_LIST *users = NULL;
 222         PAIR_LIST *entry=NULL, *next=NULL, *cur=NULL, *defaults=NULL, *lastdefault=NULL;
 223         int compat_mode = FALSE;
 224         VALUE_PAIR *vp=NULL;
 225         int hashindex = 0;
 226         long numdefaults = 0, numusers=0;
 227
 228         radlog(L_INFO, " fastusers:  Reading %s", filename);
 229         rcode = pairlist_read(filename, &users, 1);
 230         if (rcode < 0) {
 231                 return -1;
 232         }
 233
 234         if (strcmp(inst->compat_mode, "cistron") == 0) {
 235                 compat_mode = TRUE;
 236         }
 237
 238         entry = users;
 239         while (entry) {
 240                 if (compat_mode) {
 241                         DEBUG("[%s]:%d Cistron compatibility checks for entry %s ...",
 242                                 filename, entry->lineno, entry->name);
 243                 }
 244
 245                 /*
 246                  *      Look for improper use of '=' in the
 247                  *      check items.  They should be using
 248                  *      '==' for on-the-wire RADIUS attributes,
 249                  *      and probably ':=' for server
 250                  *      configuration items.
 251                  */
 252                 for (vp = entry->check; vp != NULL; vp = vp->next) {
 253                         /*
 254                          *      Ignore attributes which are set
 255                          *      properly.
 256                          */
 257                         if (vp->operator != T_OP_EQ)
 258                                 continue;
 259
 260
 261                         /*
 262                          *      If it's a vendor attribute,
 263                          *      or it's a wire protocol,
 264                          *      ensure it has '=='.
 265                          */
 266                         if (((vp->attribute & ~0xffff) != 0) ||
 267                                 (vp->attribute < 0x100)) {
 268                                 if (!compat_mode) {
 269                                         DEBUG("[%s]:%d WARNING! Changing '%s =' to '%s =='\n\tfor comparing RADIUS attribute in check item list for user %s",
 270                                         filename, entry->lineno, vp->name, vp->name, entry->name);
 271                                 } else {
 272                                         DEBUG("\tChanging '%s =' to '%s =='",
 273                                                 vp->name, vp->name);
 274                                 }
 275                                 vp->operator = T_OP_CMP_EQ;
 276                                 continue;
 277                         }
 278
 279                         /*
 280                          *      Cistron Compatibility mode.
 281                          *
 282                          *      Re-write selected attributes
 283                          *      to be '+=', instead of '='.
 284                          *
 285                          *      All others get set to '=='
 286                          */
 287                         if (compat_mode) {
 288                                 /*
 289                                  *      Non-wire attributes become +=
 290                                  *
 291                                  *      On the write attributes
 292                                  *      become ==
 293                                  */
 294                                 if ((vp->attribute >= 0x100) &&
 295                                         (vp->attribute <= 0xffff) &&
 296                                         (vp->attribute != PW_HINT) &&
 297                                         (vp->attribute != PW_HUNTGROUP_NAME)) {
 298                                         DEBUG("\tChanging '%s =' to '%s +='",
 299                                                 vp->name, vp->name);
 300                                                 vp->operator = T_OP_ADD;
 301                                 } else {
 302                                         DEBUG("\tChanging '%s =' to '%s =='",
 303                                                 vp->name, vp->name);
 304                                         vp->operator = T_OP_CMP_EQ;
 305                                 }
 306                         }
 307
 308                 } /* end of loop over check items */
 309
 310
 311                 /*
 312                  *      Look for server configuration items
 313                  *      in the reply list.
 314                  *
 315                  *      It's a common enough mistake, that it's
 316                  *      worth doing.
 317                  */
 318                 for (vp = entry->reply; vp != NULL; vp = vp->next) {
 319                         /*
 320                          *      If it's NOT a vendor attribute,
 321                          *      and it's NOT a wire protocol
 322                          *      and we ignore Fall-Through,
 323                          *      then bitch about it, giving a
 324                          *      good warning message.
 325                          */
 326                         if (!(vp->attribute & ~0xffff) &&
 327                                 (vp->attribute > 0xff) &&
 328                                 (vp->attribute > 1000)) {
 329                                 log_debug("[%s]:%d WARNING! Check item \"%s\"\n"
 330                                         "\tfound in reply item list for user \"%s\".\n"
 331                                         "\tThis attribute MUST go on the first line"
 332                                         " with the other check items",
 333                                         filename, entry->lineno, vp->name,
 334                                         entry->name);
 335                         }
 336                 }
 337
 338                 /*
 339                  * Ok, we've done all the same BS as
 340                  * rlm_users, so here we tear apart the
 341                  * linked list, and store our users in
 342                  * the hashtable we've built instead
 343                  */
 344
 345                 /* Save what was next */
 346                 next = entry->next;
 347
 348                 if(!isacctfile) {
 349                         /* Save the DEFAULT entry specially */
 350                         if(strcmp(entry->name, "DEFAULT")==0) {
 351
 352                                 /* Save this as the last default we've seen */
 353                                 lastdefault = entry;
 354                                 numdefaults++;
 355
 356                                 /* put it at the end of the list */
 357                                 if(defaults) {
 358                                         for(cur=defaults; cur->next; cur=cur->next);
 359                                         cur->next = entry;
 360                                         entry->next = NULL;
 361                                 } else {
 362                                         defaults = entry;
 363                                         defaults->next = NULL;
 364                                 }
 365
 366                         } else {
 367                                 numusers++;
 368
 369                                 /* Hash the username */
 370                                 hashindex = fastuser_hash(entry->name, inst->hashsize);
 371
 372                                 /* Store the last default before this entry */
 373                                 entry->lastdefault = lastdefault;
 374
 375                                 /* Store user in the hash */
 376                                 fastuser_store(pair_list, entry, hashindex);
 377                         }
 378                 }
 379                 /* Restore entry to next pair_list */
 380                 entry = next;
 381
 382         } /* while(entry) loop */
 383
 384         if(!isacctfile && (default_list)) {
 385                 *default_list = defaults;
 386                 radlog(L_INFO, "rlm_fastusers:  Loaded %ld users and %ld defaults",
 387                                         numusers, numdefaults);
 388         } else {
 389                 *pair_list = users;
 390         }
 391
 392         return 0;
 393 }
 394
 395 /* Hashes the username sent to it and returns index into hashtable */
 396 int fastuser_hash(const char *s, long hashtablesize) {
 397         unsigned long hash = 0;
 398
 399         while (*s != '\0') {
 400                 hash = hash * 7907 + (unsigned char)*s++;
 401         }
 402
 403         return (hash % hashtablesize);
 404 }
 405
 406 /* Stores the username sent into the hashtable */
 407 static int fastuser_store(PAIR_LIST **hashtable, PAIR_LIST *new, int idx) {
 408         PAIR_LIST *cur;
 409
 410         cur = hashtable[idx];
 411         /* store new record at end of list */
 412         if(cur) {
 413                 while (cur->next != NULL)
 414                         cur=cur->next;
 415                 cur->next = new;
 416                 new->next = NULL;
 417         } else {
 418                 new->next = hashtable[idx];
 419                 hashtable[idx] = new;
 420         }
 421         return 1;
 422 }
 423
 424 /*
 425  * Looks up user in hashtable.  If user can't be found, returns 0.
 426  * Otherwise returns a pointer to the structure for the user
 427  */
 428 static PAIR_LIST *fastuser_find(REQUEST *request, PAIR_LIST *user,
 429                                             const char *username)
 430 {
 431         PAIR_LIST *cur=user;
 432         int userfound = 0;
 433
 434         /*
 435          * Now we have to make sure it's the right user by
 436          * comparing the check pairs
 437          */
 438         while((cur) && (!userfound)) {
 439                 if((strcmp(cur->name, username)==0) &&
 440                                 paircmp(request, request->packet->vps, cur->check, &request->reply->vps) == 0) {
 441                         /*
 442                          * Usercollide means we have to compare check pairs
 443                          * AND the password
 444                          */
 445                         if(mainconfig.do_usercollide) {
 446                                 if((userfound = fastuser_passcheck(request, cur, username))==0) {
 447                                         cur = cur->next;
 448                                 }
 449
 450                         } else {
 451                                 userfound = 1;
 452                                 DEBUG2("  fastusers: Matched %s at %d", cur->name, cur->lineno);
 453                         }
 454                 } else {
 455                         cur = cur->next;
 456                 }
 457         }
 458
 459         if(cur) {
 460                 return cur;
 461         }
 462
 463         return (PAIR_LIST *)0;
 464 }
 465
 466 /*
 467  * Generate and log statistics about our hash table
 468  */
 469 static void fastuser_tablestats(PAIR_LIST **hashtable, long size) {
 470         int i, count;
 471         int countarray[256];
 472         int toomany=0;
 473         PAIR_LIST *cur;
 474
 475         memset(countarray, 0, sizeof(countarray));
 476
 477         for(i=0; i<size; i++) {
 478                 count = 0;
 479                 for(cur=hashtable[i]; cur; cur=cur->next) {
 480                         count++;
 481                 }
 482                 if(count<256) {
 483                         countarray[count]++;
 484                 } else {
 485                         toomany++;
 486                 }
 487         }
 488
 489         for(i=0; i<256; i++)
 490                 if(countarray[i]) {
 491                         radlog(L_INFO, "rlm_fastusers:  Hash buckets with %d users:  %d",
 492                                                 i, countarray[i]);
 493                 }
 494
 495         if(toomany) {
 496                 radlog(L_INFO, "rlm_fastusers:  Hash buckets with more than 256:  %d",
 497                                         toomany);
 498         }
 499 }
 500
 501 static int fastuser_passcheck(REQUEST *request, PAIR_LIST *user, const char *name)
 502 {
 503         int found=0;
 504         VALUE_PAIR      *check_save;
 505
 506         /*
 507          * We check for REJECT specially here or a REJECT
 508          * user will never match
 509          */
 510         check_save = pairfind(user->check, PW_AUTHTYPE);
 511         if((check_save) && check_save->lvalue == PW_AUTHTYPE_REJECT)  {
 512                 DEBUG2("  fastusers(uc):  User '%s' line %d is Auth-Type Reject, but usercollide match",
 513                                         user->name, user->lineno);
 514                 return 1;
 515         }
 516
 517         /* Save the orginal config items */
 518         check_save = request->config_items;
 519         request->config_items = NULL;
 520
 521         DEBUG2("  fastusers(uc): Checking %s at %d", user->name, user->lineno);
 522
 523         /* Copy this users check pairs to the request */
 524         request->config_items = paircopy(user->check);
 525
 526         /* Check the req to see if we matched */
 527         if(rad_check_password(request)==0) {
 528                 DEBUG2("  fastusers(uc): Matched %s at %d", user->name, user->lineno);
 529                 found = 1;
 530         }
 531
 532         /* Restore check items */
 533         pairfree(&request->config_items);
 534         request->config_items = check_save;
 535
 536         return found;
 537 }
 538
 539 /*
 540  *      (Re-)read the "users" file into memory.
 541  */
 542 static int fastuser_instantiate(CONF_SECTION *conf, void **instance)
 543 {
 544         struct fastuser_instance *inst=0;
 545
 546         inst = rad_malloc(sizeof *inst);
 547
 548         memset(inst, 0, sizeof(*inst));
 549
 550         if (cf_section_parse(conf, inst, module_config) < 0) {
 551                 free(inst);
 552                 return -1;
 553         }
 554
 555         inst->next_reload = time(NULL) + inst->hash_reload;
 556         inst->hashtable = NULL;
 557         inst->lastusersload = 0;
 558         inst->lastacctusersload = 0;
 559         if(fastuser_buildhash(inst) < 0) {
 560                 radlog(L_ERR, "rlm_fastusers:  error building user hash.  aborting");
 561                 return -1;
 562         }
 563
 564         /*
 565          * Need code here to read acct_users file
 566          */
 567
 568         *instance = inst;
 569         return 0;
 570 }
 571
 572 /*
 573  *      Find the named user in the database.  Create the
 574  *      set of attribute-value pairs to check and reply with
 575  *      for this user from the database. The main code only
 576  *      needs to check the password, the rest is done here.
 577  */
 578 static int fastuser_authorize(void *instance, REQUEST *request)
 579 {
 580
 581         VALUE_PAIR      *namepair;
 582         VALUE_PAIR      *check_tmp;
 583         VALUE_PAIR      *reply_tmp;
 584         PAIR_LIST               *user;
 585         PAIR_LIST               *curdefault;
 586         const char      *name;
 587         int                     userfound=0;
 588         int                     defaultfound=0;
 589         int                     hashidx=0;
 590         struct fastuser_instance *inst = instance;
 591
 592         /*
 593          * Do we need to reload the cache?
 594          * Really we should spawn a thread to do this
 595          */
 596         if((inst->hash_reload) && (request->timestamp > inst->next_reload)) {
 597                 inst->next_reload = request->timestamp + inst->hash_reload;
 598                 radlog(L_INFO, "rlm_fastusers:  Reloading fastusers hash");
 599                 if(fastuser_buildhash(inst) < 0) {
 600                         radlog(L_ERR, "rlm_fastusers:  error building user hash.  aborting");
 601                         exit(1);
 602                 }
 603         }
 604
 605         /*
 606          *      Grab the canonical user name.
 607          */
 608         namepair = request->username;
 609         name = namepair ? (char *) namepair->strvalue : "NONE";
 610
 611         /*
 612          *      Find the entry for the user.
 613          */
 614         hashidx = fastuser_hash(name, inst->hashsize);
 615         user = inst->hashtable[hashidx];
 616         if((user=fastuser_find(request, user, name))!=NULL) {
 617                 userfound = 1;
 618         }
 619
 620         /*
 621          * If there's no lastdefault and we
 622          * don't fallthrough, just copy the
 623          * pairs for this user and return
 624          */
 625         if((user) && (userfound) && (user->lastdefault == NULL)) {
 626                 DEBUG2("rlm_fastusers:  user found before DEFAULT");
 627
 628                 check_tmp = paircopy(user->check);
 629                 pairmove(&request->config_items, &check_tmp);
 630                 pairfree(&check_tmp);
 631
 632                 reply_tmp = paircopy(user->reply);
 633                 pairmove(&request->reply->vps, &reply_tmp);
 634                 pairfree(&reply_tmp);
 635
 636                 if(!fallthrough(user->reply)) {
 637                         pairdelete(&request->reply->vps, PW_FALL_THROUGH);
 638                         return(rad_check_return(user->check));
 639                 } else {
 640                         user=user->next;
 641                         user=fastuser_find(request, user, name);
 642                 }
 643         }
 644
 645         /*
 646          * When we get here, we've either found
 647          * the user or not, but to preserve order
 648          * we start at the top of the default
 649          * list and work our way thru
 650          * When we get to the user's 'lastdefault'
 651          * we check to see if we should stop
 652          * and return
 653          */
 654         DEBUG2("rlm_fastusers:  checking defaults");
 655
 656         curdefault = inst->defaults;
 657         while(curdefault) {
 658                 if(paircmp(request, request->packet->vps, curdefault->check,
 659                                                         &request->reply->vps) == 0) {
 660                         DEBUG2("  fastusers: Matched %s at %d",
 661                                                         curdefault->name, curdefault->lineno);
 662                         defaultfound = 1;
 663
 664                         check_tmp = paircopy(curdefault->check);
 665                         pairmove(&request->config_items, &check_tmp);
 666                         pairfree(&check_tmp);
 667
 668                         reply_tmp = paircopy(curdefault->reply);
 669                         pairmove(&request->reply->vps, &reply_tmp);
 670                         pairfree(&reply_tmp);
 671
 672                 }
 673
 674                 /*
 675                  * There's no fallthru on this default which
 676                  * is *before* we find the user in the file,
 677                  * so we know it's safe to quit here
 678                  */
 679                 if (!fallthrough(curdefault->reply))
 680                         break;
 681
 682                 /*
 683                  * If we found the user, we want to stop
 684                  * processing once we get to 'lastdefault'
 685                  * This way we can process this user's entry
 686                  * in the order it was found in the file
 687                  */
 688                 while((userfound && (user) && (curdefault == user->lastdefault))) {
 689                                 DEBUG2("  fastusers:  found lastdefault at line %d",
 690                                                    curdefault->lineno);
 691
 692                         check_tmp = paircopy(user->check);
 693                         pairmove(&request->config_items, &check_tmp);
 694                         pairfree(&check_tmp);
 695
 696                         reply_tmp = paircopy(user->reply);
 697                         pairmove(&request->reply->vps, &reply_tmp);
 698                         pairfree(&reply_tmp);
 699
 700                         if(!fallthrough(user->reply)) {
 701                                 pairdelete(&request->reply->vps, PW_FALL_THROUGH);
 702                                 return(rad_check_return(user->check));
 703                         }
 704
 705                         /*
 706                          * Find next occurence of THIS user in
 707                          * the users file
 708                          */
 709                         user=user->next;
 710                         user=fastuser_find(request, user, name);
 711                 }
 712
 713                 curdefault = curdefault->next;
 714         }
 715
 716         if(userfound || defaultfound) {
 717                 pairdelete(&request->reply->vps, PW_FALL_THROUGH);
 718                 return(rad_check_return(request->config_items));
 719         } else {
 720                 DEBUG2("rlm_fastusers:  user not found");
 721                 return RLM_MODULE_NOTFOUND;
 722         }
 723 }
 724
 725 /*
 726  *      Authentication - unused.
 727  */
 728 static int fastuser_authenticate(void *instance, REQUEST *request)
 729 {
 730         instance = instance;
 731         request = request;
 732         return RLM_MODULE_OK;
 733 }
 734
 735 /*
 736  *      Pre-Accounting - read the acct_users file for check_items and
 737  *      config_items. Reply items are Not Recommended(TM) in acct_users,
 738  *      except for Fallthrough, which should work
 739  *
 740  *      This function is mostly a copy of file_authorize
 741  */
 742 static int fastuser_preacct(void *instance, REQUEST *request)
 743 {
 744         VALUE_PAIR      *namepair;
 745         const char      *name;
 746         VALUE_PAIR      *request_pairs;
 747         VALUE_PAIR      **config_pairs;
 748         VALUE_PAIR      *reply_pairs = NULL;
 749         VALUE_PAIR      *check_tmp;
 750         VALUE_PAIR      *reply_tmp;
 751         PAIR_LIST       *pl = NULL;
 752         int             found = 0;
 753         struct fastuser_instance *inst = instance;
 754
 755         namepair = request->username;
 756         name = namepair ? (char *) namepair->strvalue : "NONE";
 757         request_pairs = request->packet->vps;
 758         config_pairs = &request->config_items;
 759
 760         /*
 761          *      Find the entry for the user.
 762          */
 763         for (pl = inst->acctusers; pl; pl = pl->next) {
 764
 765                 if (strcmp(name, pl->name) && strcmp(pl->name, "DEFAULT"))
 766                         continue;
 767
 768                 if (paircmp(request, request_pairs, pl->check, &reply_pairs) == 0) {
 769                         DEBUG2("  acct_users: Matched %s at %d",
 770                                pl->name, pl->lineno);
 771                         found = 1;
 772                         check_tmp = paircopy(pl->check);
 773                         reply_tmp = paircopy(pl->reply);
 774                         pairmove(&reply_pairs, &reply_tmp);
 775                         pairmove(config_pairs, &check_tmp);
 776                         pairfree(&reply_tmp);
 777                         pairfree(&check_tmp); /* should be NULL */
 778                         /*
 779                          *      Fallthrough?
 780                          */
 781                         if (!fallthrough(pl->reply))
 782                                 break;
 783                 }
 784         }
 785
 786         /*
 787          *      See if we succeeded.
 788          */
 789         if (!found)
 790                 return RLM_MODULE_NOOP; /* on to the next module */
 791
 792         /*
 793          *      FIXME: log a warning if there are any reply items other than
 794          *      Fallthrough
 795          */
 796         pairfree(&reply_pairs); /* Don't need these */
 797
 798         return RLM_MODULE_OK;
 799 }
 800
 801 /*
 802  *  Clean up.
 803  */
 804 static int fastuser_detach(void *instance)
 805 {
 806         struct fastuser_instance *inst = instance;
 807         int hashindex;
 808         PAIR_LIST *cur;
 809
 810         /* Free hash table */
 811         for(hashindex=0; hashindex<inst->hashsize; hashindex++) {
 812                 if(inst->hashtable[hashindex]) {
 813                         cur = inst->hashtable[hashindex];
 814                         pairlist_free(&cur);
 815                 }
 816         }
 817
 818         free(inst->compat_mode);
 819         free(inst->hashtable);
 820         pairlist_free(&inst->defaults);
 821         pairlist_free(&inst->acctusers);
 822         free(inst->usersfile);
 823         free(inst->acctusersfile);
 824         free(inst);
 825         return 0;
 826 }
 827
 828 /*
 829  *      This function is unused
 830  */
 831 static int fastuser_accounting(void *instance, REQUEST *request)
 832 {
 833         return RLM_MODULE_FAIL;
 834 }
 835
 836 /* globally exported name */
 837 module_t rlm_fastusers = {
 838         "fastusers",
 839         0,                              /* type: reserved */
 840         NULL,                           /* initialization */
 841         fastuser_instantiate,           /* instantiation */
 842         {
 843                 fastuser_authenticate,  /* authentication */
 844                 fastuser_authorize,     /* authorization */
 845                 fastuser_preacct,       /* preaccounting */
 846                 fastuser_accounting,    /* accounting */
 847                 NULL,                   /* checksimul */
 848                 NULL,                   /* pre-proxy */
 849                 NULL,                   /* post-proxy */
 850                 NULL                    /* post-auth */
 851         },
 852         fastuser_detach,                /* detach */
 853         NULL                            /* destroy */
 854 };
 855