src/modules/rlm_sql/rlm_sql.c

   1
   2 /*
   3  * rlm_sql.c            SQL Module
   4  *              Main SQL module file. Most ICRADIUS code is located in sql.c
   5  *
   6  * Version:     $Id$
   7  *
   8  *   This program is free software; you can redistribute it and/or modify
   9  *   it under the terms of the GNU General Public License as published by
  10  *   the Free Software Foundation; either version 2 of the License, or
  11  *   (at your option) any later version.
  12  *
  13  *   This program is distributed in the hope that it will be useful,
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *   GNU General Public License for more details.
  17  *
  18  *   You should have received a copy of the GNU General Public License
  19  *   along with this program; if not, write to the Free Software
  20  *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  *
  22  * Copyright 2012  Arran Cudbard-Bell <a.cudbardb@freeradius.org>
  23  * Copyright 2000,2006  The FreeRADIUS server project
  24  * Copyright 2000  Mike Machado <mike@innercite.com>
  25  * Copyright 2000  Alan DeKok <aland@ox.org>
  26  */
  27
  28 #include <freeradius-devel/ident.h>
  29 RCSID("$Id$")
  30
  31 #include <ctype.h>
  32
  33 #include <freeradius-devel/radiusd.h>
  34 #include <freeradius-devel/modules.h>
  35 #include <freeradius-devel/token.h>
  36 #include <freeradius-devel/rad_assert.h>
  37
  38 #include <sys/stat.h>
  39
  40 #include "rlm_sql.h"
  41
  42 static const CONF_PARSER acct_section_config[] = {
  43         {"reference", PW_TYPE_STRING_PTR,
  44           offsetof(sql_acct_section_t, reference), NULL, ".query"},
  45
  46         {"logfile", PW_TYPE_STRING_PTR,
  47          offsetof(sql_acct_section_t, logfile), NULL, NULL},
  48         {NULL, -1, 0, NULL, NULL}
  49 };
  50
  51 static const CONF_PARSER module_config[] = {
  52         {"driver", PW_TYPE_STRING_PTR,
  53          offsetof(SQL_CONFIG,sql_driver), NULL, "mysql"},
  54         {"server", PW_TYPE_STRING_PTR,
  55          offsetof(SQL_CONFIG,sql_server), NULL, "localhost"},
  56         {"port", PW_TYPE_STRING_PTR,
  57          offsetof(SQL_CONFIG,sql_port), NULL, ""},
  58         {"login", PW_TYPE_STRING_PTR,
  59          offsetof(SQL_CONFIG,sql_login), NULL, ""},
  60         {"password", PW_TYPE_STRING_PTR,
  61          offsetof(SQL_CONFIG,sql_password), NULL, ""},
  62         {"radius_db", PW_TYPE_STRING_PTR,
  63          offsetof(SQL_CONFIG,sql_db), NULL, "radius"},
  64         {"filename", PW_TYPE_FILENAME, /* for sqlite */
  65          offsetof(SQL_CONFIG,sql_file), NULL, NULL},
  66         {"read_groups", PW_TYPE_BOOLEAN,
  67          offsetof(SQL_CONFIG,read_groups), NULL, "yes"},
  68         {"readclients", PW_TYPE_BOOLEAN,
  69          offsetof(SQL_CONFIG,do_clients), NULL, "no"},
  70         {"deletestalesessions", PW_TYPE_BOOLEAN,
  71          offsetof(SQL_CONFIG,deletestalesessions), NULL, "yes"},
  72         {"sql_user_name", PW_TYPE_STRING_PTR,
  73          offsetof(SQL_CONFIG,query_user), NULL, ""},
  74         {"logfile", PW_TYPE_STRING_PTR,
  75          offsetof(SQL_CONFIG,logfile), NULL, NULL},
  76         {"default_user_profile", PW_TYPE_STRING_PTR,
  77          offsetof(SQL_CONFIG,default_profile), NULL, ""},
  78         {"nas_query", PW_TYPE_STRING_PTR,
  79          offsetof(SQL_CONFIG,nas_query), NULL,
  80          "SELECT id,nasname,shortname,type,secret FROM nas"},
  81         {"authorize_check_query", PW_TYPE_STRING_PTR,
  82          offsetof(SQL_CONFIG,authorize_check_query), NULL, ""},
  83         {"authorize_reply_query", PW_TYPE_STRING_PTR,
  84          offsetof(SQL_CONFIG,authorize_reply_query), NULL, NULL},
  85         {"authorize_group_check_query", PW_TYPE_STRING_PTR,
  86          offsetof(SQL_CONFIG,authorize_group_check_query), NULL, ""},
  87         {"authorize_group_reply_query", PW_TYPE_STRING_PTR,
  88          offsetof(SQL_CONFIG,authorize_group_reply_query), NULL, ""},
  89         {"group_membership_query", PW_TYPE_STRING_PTR,
  90          offsetof(SQL_CONFIG,groupmemb_query), NULL, NULL},
  91 #ifdef WITH_SESSION_MGMT
  92         {"simul_count_query", PW_TYPE_STRING_PTR,
  93          offsetof(SQL_CONFIG,simul_count_query), NULL, ""},
  94         {"simul_verify_query", PW_TYPE_STRING_PTR,
  95          offsetof(SQL_CONFIG,simul_verify_query), NULL, ""},
  96 #endif
  97         {"safe-characters", PW_TYPE_STRING_PTR,
  98          offsetof(SQL_CONFIG,allowed_chars), NULL,
  99         "@abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.-_: /"},
 100
 101         /*
 102          *      This only works for a few drivers.
 103          */
 104         {"query_timeout", PW_TYPE_INTEGER,
 105          offsetof(SQL_CONFIG,query_timeout), NULL, NULL},
 106
 107         {NULL, -1, 0, NULL, NULL}
 108 };
 109
 110 /*
 111  *      Fall-Through checking function from rlm_files.c
 112  */
 113 static int fallthrough(VALUE_PAIR *vp)
 114 {
 115         VALUE_PAIR *tmp;
 116         tmp = pairfind(vp, PW_FALL_THROUGH, 0);
 117
 118         return tmp ? tmp->vp_integer : 0;
 119 }
 120
 121
 122
 123 /*
 124  *      Yucky prototype.
 125  */
 126 static int generate_sql_clients(SQL_INST *inst);
 127 static size_t sql_escape_func(REQUEST *, char *out, size_t outlen, const char *in, void *arg);
 128
 129 /*
 130  *                      SQL xlat function
 131  *
 132  *  For selects the first value of the first column will be returned,
 133  *  for inserts, updates and deletes the number of rows afftected will be
 134  *  returned instead.
 135  */
 136 static size_t sql_xlat(void *instance, REQUEST *request,
 137                     const char *fmt, char *out, size_t freespace)
 138 {
 139         SQLSOCK *sqlsocket;
 140         SQL_ROW row;
 141         SQL_INST *inst = instance;
 142         char querystr[MAX_QUERY_LEN];
 143         size_t ret = 0;
 144
 145         RDEBUG("sql_xlat");
 146
 147         /*
 148          * Add SQL-User-Name attribute just in case it is needed
 149          *  We could search the string fmt for SQL-User-Name to see if this is
 150          *  needed or not
 151          */
 152         sql_set_user(inst, request, NULL);
 153         /*
 154          * Do an xlat on the provided string (nice recursive operation).
 155          */
 156         if (!radius_xlat(querystr, sizeof(querystr), fmt, request, sql_escape_func, inst)) {
 157                 radlog(L_ERR, "rlm_sql (%s): xlat failed.",
 158                        inst->config->xlat_name);
 159                 return 0;
 160         }
 161
 162         sqlsocket = sql_get_socket(inst);
 163         if (sqlsocket == NULL)
 164                 return 0;
 165
 166         rlm_sql_query_log(inst, request, NULL, querystr);
 167
 168         /*
 169          *      If the query starts with any of the following prefixes,
 170          *      then return the number of rows affected
 171          */
 172         if ((strncasecmp(querystr, "insert", 6) == 0) ||
 173             (strncasecmp(querystr, "update", 6) == 0) ||
 174             (strncasecmp(querystr, "delete", 6) == 0)) {
 175                 int numaffected;
 176                 char buffer[21]; /* 64bit max is 20 decimal chars + null byte */
 177
 178                 if (rlm_sql_query(&sqlsocket,inst,querystr)) {
 179                         sql_release_socket(inst,sqlsocket);
 180
 181                         return 0;
 182                 }
 183
 184                 numaffected = (inst->module->sql_affected_rows)(sqlsocket,
 185                                                                 inst->config);
 186                 if (numaffected < 1) {
 187                         RDEBUG("rlm_sql (%s): SQL query affected no rows",
 188                                 inst->config->xlat_name);
 189                 }
 190
 191                 /*
 192                  *      Don't chop the returned number if freespace is
 193                  *      too small.  This hack is necessary because
 194                  *      some implementations of snprintf return the
 195                  *      size of the written data, and others return
 196                  *      the size of the data they *would* have written
 197                  *      if the output buffer was large enough.
 198                  */
 199                 snprintf(buffer, sizeof(buffer), "%d", numaffected);
 200                 ret = strlen(buffer);
 201                 if (ret >= freespace){
 202                         RDEBUG("rlm_sql (%s): Can't write result, insufficient string space",
 203                                inst->config->xlat_name);
 204                         (inst->module->sql_finish_query)(sqlsocket,
 205                                                          inst->config);
 206                         sql_release_socket(inst,sqlsocket);
 207                         return 0;
 208                 }
 209
 210                 memcpy(out, buffer, ret + 1); /* we did bounds checking above */
 211
 212                 (inst->module->sql_finish_query)(sqlsocket, inst->config);
 213                 sql_release_socket(inst,sqlsocket);
 214                 return ret;
 215         } /* else it's a SELECT statement */
 216
 217         if (rlm_sql_select_query(&sqlsocket,inst,querystr)){
 218                 sql_release_socket(inst,sqlsocket);
 219                 return 0;
 220         }
 221
 222         ret = rlm_sql_fetch_row(&sqlsocket, inst);
 223         if (ret) {
 224                 RDEBUG("SQL query did not succeed");
 225                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 226                 sql_release_socket(inst,sqlsocket);
 227                 return 0;
 228         }
 229
 230         row = sqlsocket->row;
 231         if (row == NULL) {
 232                 RDEBUG("SQL query did not return any results");
 233                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 234                 sql_release_socket(inst,sqlsocket);
 235                 return 0;
 236         }
 237
 238         if (row[0] == NULL){
 239                 RDEBUG("Null value in first column");
 240                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 241                 sql_release_socket(inst,sqlsocket);
 242                 return 0;
 243         }
 244         ret = strlen(row[0]);
 245         if (ret >= freespace){
 246                 RDEBUG("Insufficient string space");
 247                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 248                 sql_release_socket(inst,sqlsocket);
 249                 return 0;
 250         }
 251
 252         strlcpy(out,row[0],freespace);
 253
 254         RDEBUG("sql_xlat finished");
 255
 256         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 257         sql_release_socket(inst,sqlsocket);
 258         return ret;
 259 }
 260
 261 static int generate_sql_clients(SQL_INST *inst)
 262 {
 263         SQLSOCK *sqlsocket;
 264         SQL_ROW row;
 265         char querystr[MAX_QUERY_LEN];
 266         RADCLIENT *c;
 267         char *prefix_ptr = NULL;
 268         unsigned int i = 0;
 269         int numf = 0;
 270
 271         DEBUG("rlm_sql (%s): Processing generate_sql_clients",
 272               inst->config->xlat_name);
 273
 274         /* NAS query isn't xlat'ed */
 275         strlcpy(querystr, inst->config->nas_query, sizeof(querystr));
 276         DEBUG("rlm_sql (%s) in generate_sql_clients: query is %s",
 277               inst->config->xlat_name, querystr);
 278
 279         sqlsocket = sql_get_socket(inst);
 280         if (sqlsocket == NULL)
 281                 return -1;
 282         if (rlm_sql_select_query(&sqlsocket,inst,querystr)){
 283                 return -1;
 284         }
 285
 286         while(rlm_sql_fetch_row(&sqlsocket, inst) == 0) {
 287                 i++;
 288                 row = sqlsocket->row;
 289                 if (row == NULL)
 290                         break;
 291                 /*
 292                  *  The return data for each row MUST be in the following order:
 293                  *
 294                  *  0. Row ID (currently unused)
 295                  *  1. Name (or IP address)
 296                  *  2. Shortname
 297                  *  3. Type
 298                  *  4. Secret
 299                  *  5. Virtual Server (optional)
 300                  */
 301                 if (!row[0]){
 302                         radlog(L_ERR, "rlm_sql (%s): No row id found on pass %d",inst->config->xlat_name,i);
 303                         continue;
 304                 }
 305                 if (!row[1]){
 306                         radlog(L_ERR, "rlm_sql (%s): No nasname found for row %s",inst->config->xlat_name,row[0]);
 307                         continue;
 308                 }
 309                 if (!row[2]){
 310                         radlog(L_ERR, "rlm_sql (%s): No short name found for row %s",inst->config->xlat_name,row[0]);
 311                         continue;
 312                 }
 313                 if (!row[4]){
 314                         radlog(L_ERR, "rlm_sql (%s): No secret found for row %s",inst->config->xlat_name,row[0]);
 315                         continue;
 316                 }
 317
 318                 DEBUG("rlm_sql (%s): Read entry nasname=%s,shortname=%s,secret=%s",inst->config->xlat_name,
 319                         row[1],row[2],row[4]);
 320
 321                 c = rad_malloc(sizeof(*c));
 322                 memset(c, 0, sizeof(*c));
 323
 324 #ifdef WITH_DYNAMIC_CLIENTS
 325                 c->dynamic = 1;
 326 #endif
 327
 328                 /*
 329                  *      Look for prefixes
 330                  */
 331                 c->prefix = -1;
 332                 prefix_ptr = strchr(row[1], '/');
 333                 if (prefix_ptr) {
 334                         c->prefix = atoi(prefix_ptr + 1);
 335                         if ((c->prefix < 0) || (c->prefix > 128)) {
 336                                 radlog(L_ERR, "rlm_sql (%s): Invalid Prefix value '%s' for IP.",
 337                                        inst->config->xlat_name, prefix_ptr + 1);
 338                                 free(c);
 339                                 continue;
 340                         }
 341                         /* Replace '/' with '\0' */
 342                         *prefix_ptr = '\0';
 343                 }
 344
 345                 /*
 346                  *      Always get the numeric representation of IP
 347                  */
 348                 if (ip_hton(row[1], AF_UNSPEC, &c->ipaddr) < 0) {
 349                         radlog(L_CONS|L_ERR, "rlm_sql (%s): Failed to look up hostname %s: %s",
 350                                inst->config->xlat_name,
 351                                row[1], fr_strerror());
 352                         free(c);
 353                         continue;
 354                 } else {
 355                         char buffer[256];
 356                         ip_ntoh(&c->ipaddr, buffer, sizeof(buffer));
 357                         c->longname = strdup(buffer);
 358                 }
 359
 360                 if (c->prefix < 0) switch (c->ipaddr.af) {
 361                 case AF_INET:
 362                         c->prefix = 32;
 363                         break;
 364                 case AF_INET6:
 365                         c->prefix = 128;
 366                         break;
 367                 default:
 368                         break;
 369                 }
 370
 371                 /*
 372                  *      Other values (secret, shortname, nastype, virtual_server)
 373                  */
 374                 c->secret = strdup(row[4]);
 375                 c->shortname = strdup(row[2]);
 376                 if(row[3] != NULL)
 377                         c->nastype = strdup(row[3]);
 378
 379                 numf = (inst->module->sql_num_fields)(sqlsocket, inst->config);
 380                 if ((numf > 5) && (row[5] != NULL) && *row[5]) c->server = strdup(row[5]);
 381
 382                 DEBUG("rlm_sql (%s): Adding client %s (%s, server=%s) to clients list",
 383                       inst->config->xlat_name,
 384                       c->longname,c->shortname, c->server ? c->server : "<none>");
 385                 if (!client_add(NULL, c)) {
 386                         sql_release_socket(inst, sqlsocket);
 387                         DEBUG("rlm_sql (%s): Failed to add client %s (%s) to clients list.  Maybe there's a duplicate?",
 388                               inst->config->xlat_name,
 389                               c->longname,c->shortname);
 390                         client_free(c);
 391                         return -1;
 392                 }
 393         }
 394         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 395         sql_release_socket(inst, sqlsocket);
 396
 397         return 0;
 398 }
 399
 400
 401 /*
 402  *      Translate the SQL queries.
 403  */
 404 static size_t sql_escape_func(UNUSED REQUEST *request, char *out, size_t outlen,
 405                               const char *in, void *arg)
 406 {
 407         SQL_INST *inst = arg;
 408         size_t len = 0;
 409
 410         while (in[0]) {
 411                 /*
 412                  *      Non-printable characters get replaced with their
 413                  *      mime-encoded equivalents.
 414                  */
 415                 if ((in[0] < 32) ||
 416                     strchr(inst->config->allowed_chars, *in) == NULL) {
 417                         /*
 418                          *      Only 3 or less bytes available.
 419                          */
 420                         if (outlen <= 3) {
 421                                 break;
 422                         }
 423
 424                         snprintf(out, outlen, "=%02X", (unsigned char) in[0]);
 425                         in++;
 426                         out += 3;
 427                         outlen -= 3;
 428                         len += 3;
 429                         continue;
 430                 }
 431
 432                 /*
 433                  *      Only one byte left.
 434                  */
 435                 if (outlen <= 1) {
 436                         break;
 437                 }
 438
 439                 /*
 440                  *      Allowed character.
 441                  */
 442                 *out = *in;
 443                 out++;
 444                 in++;
 445                 outlen--;
 446                 len++;
 447         }
 448         *out = '\0';
 449         return len;
 450 }
 451
 452 /*
 453  *      Set the SQL user name.
 454  *
 455  *      We don't call the escape function here. The resulting string
 456  *      will be escaped later in the queries xlat so we don't need to
 457  *      escape it twice. (it will make things wrong if we have an
 458  *      escape candidate character in the username)
 459  */
 460 int sql_set_user(SQL_INST *inst, REQUEST *request, const char *username)
 461 {
 462         VALUE_PAIR *vp = NULL;
 463         const char *sqluser;
 464
 465         if (username != NULL) {
 466                 sqluser = username;
 467         } else if (*inst->config->query_user) {
 468                 sqluser = inst->config->query_user;
 469         } else {
 470                 return 0;
 471         }
 472
 473         vp = pairmake_xlat("SQL-User-Name", sqluser, T_OP_SET);
 474         if (!vp) {
 475                 return -1;
 476         }
 477
 478         pairxlatmove(request, &(request->packet->vps), &vp);
 479         pairfree(&vp); /* Free the VP if for some reason it wasn't moved */
 480
 481         RDEBUG2("SQL-User-Name updated");
 482
 483         return 0;
 484 }
 485
 486
 487 static void sql_grouplist_free (SQL_GROUPLIST **group_list)
 488 {
 489         SQL_GROUPLIST *last;
 490
 491         while(*group_list) {
 492                 last = *group_list;
 493                 *group_list = (*group_list)->next;
 494                 free(last);
 495         }
 496 }
 497
 498
 499 static int sql_get_grouplist (SQL_INST *inst, SQLSOCK *sqlsocket, REQUEST *request, SQL_GROUPLIST **group_list)
 500 {
 501         char    querystr[MAX_QUERY_LEN];
 502         int     num_groups = 0;
 503         SQL_ROW row;
 504         SQL_GROUPLIST   *group_list_tmp;
 505
 506         /* NOTE: sql_set_user should have been run before calling this function */
 507
 508         group_list_tmp = *group_list = NULL;
 509
 510         if (!inst->config->groupmemb_query ||
 511             (inst->config->groupmemb_query[0] == 0))
 512                 return 0;
 513
 514         if (!radius_xlat(querystr, sizeof(querystr), inst->config->groupmemb_query, request, sql_escape_func, inst)) {
 515                 radlog_request(L_ERR, 0, request, "xlat \"%s\" failed.",
 516                                inst->config->groupmemb_query);
 517                 return -1;
 518         }
 519
 520         if (rlm_sql_select_query(&sqlsocket, inst, querystr) < 0) {
 521                 return -1;
 522         }
 523         while (rlm_sql_fetch_row(&sqlsocket, inst) == 0) {
 524                 row = sqlsocket->row;
 525                 if (row == NULL)
 526                         break;
 527                 if (row[0] == NULL){
 528                         RDEBUG("row[0] returned NULL");
 529                         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 530                         sql_grouplist_free(group_list);
 531                         return -1;
 532                 }
 533                 if (*group_list == NULL) {
 534                         *group_list = rad_malloc(sizeof(SQL_GROUPLIST));
 535                         group_list_tmp = *group_list;
 536                 } else {
 537                         rad_assert(group_list_tmp != NULL);
 538                         group_list_tmp->next = rad_malloc(sizeof(SQL_GROUPLIST));
 539                         group_list_tmp = group_list_tmp->next;
 540                 }
 541                 group_list_tmp->next = NULL;
 542                 strlcpy(group_list_tmp->groupname, row[0], MAX_STRING_LEN);
 543         }
 544
 545         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 546
 547         return num_groups;
 548 }
 549
 550
 551 /*
 552  * sql groupcmp function. That way we can do group comparisons (in the users file for example)
 553  * with the group memberships reciding in sql
 554  * The group membership query should only return one element which is the username. The returned
 555  * username will then be checked with the passed check string.
 556  */
 557
 558 static int sql_groupcmp(void *instance, REQUEST *request, VALUE_PAIR *request_vp, VALUE_PAIR *check,
 559                         VALUE_PAIR *check_pairs, VALUE_PAIR **reply_pairs)
 560 {
 561         SQLSOCK *sqlsocket;
 562         SQL_INST *inst = instance;
 563         SQL_GROUPLIST *group_list, *group_list_tmp;
 564
 565         check_pairs = check_pairs;
 566         reply_pairs = reply_pairs;
 567         request_vp = request_vp;
 568
 569         RDEBUG("sql_groupcmp");
 570         if (!check || !check->vp_strvalue || !check->length){
 571                 RDEBUG("sql_groupcmp: Illegal group name");
 572                 return 1;
 573         }
 574         if (!request){
 575                 RDEBUG("sql_groupcmp: NULL request");
 576                 return 1;
 577         }
 578         /*
 579          *      Set, escape, and check the user attr here
 580          */
 581         if (sql_set_user(inst, request, NULL) < 0)
 582                 return 1;
 583
 584         /*
 585          *      Get a socket for this lookup
 586          */
 587         sqlsocket = sql_get_socket(inst);
 588         if (sqlsocket == NULL) {
 589                 return 1;
 590         }
 591
 592         /*
 593          *      Get the list of groups this user is a member of
 594          */
 595         if (sql_get_grouplist(inst, sqlsocket, request, &group_list) < 0) {
 596                 radlog_request(L_ERR, 0, request,
 597                                "Error getting group membership");
 598                 sql_release_socket(inst, sqlsocket);
 599                 return 1;
 600         }
 601
 602         for (group_list_tmp = group_list; group_list_tmp != NULL; group_list_tmp = group_list_tmp->next) {
 603                 if (strcmp(group_list_tmp->groupname, check->vp_strvalue) == 0){
 604                         RDEBUG("sql_groupcmp finished: User is a member of group %s",
 605                                check->vp_strvalue);
 606                         /* Free the grouplist */
 607                         sql_grouplist_free(&group_list);
 608                         sql_release_socket(inst, sqlsocket);
 609                         return 0;
 610                 }
 611         }
 612
 613         /* Free the grouplist */
 614         sql_grouplist_free(&group_list);
 615         sql_release_socket(inst,sqlsocket);
 616
 617         RDEBUG("sql_groupcmp finished: User is NOT a member of group %s",
 618                check->vp_strvalue);
 619
 620         return 1;
 621 }
 622
 623
 624
 625 static int rlm_sql_process_groups(SQL_INST *inst, REQUEST *request, SQLSOCK *sqlsocket, int *dofallthrough)
 626 {
 627         VALUE_PAIR *check_tmp = NULL;
 628         VALUE_PAIR *reply_tmp = NULL;
 629         SQL_GROUPLIST *group_list, *group_list_tmp;
 630         VALUE_PAIR *sql_group = NULL;
 631         char    querystr[MAX_QUERY_LEN];
 632         int found = 0;
 633         int rows;
 634
 635         /*
 636          *      Get the list of groups this user is a member of
 637          */
 638         if (sql_get_grouplist(inst, sqlsocket, request, &group_list) < 0) {
 639                 radlog_request(L_ERR, 0, request, "Error retrieving group list");
 640                 return -1;
 641         }
 642
 643         for (group_list_tmp = group_list; group_list_tmp != NULL && *dofallthrough != 0; group_list_tmp = group_list_tmp->next) {
 644                 /*
 645                  *      Add the Sql-Group attribute to the request list so we know
 646                  *      which group we're retrieving attributes for
 647                  */
 648                 sql_group = pairmake("Sql-Group", group_list_tmp->groupname, T_OP_EQ);
 649                 if (!sql_group) {
 650                         radlog_request(L_ERR, 0, request,
 651                                        "Error creating Sql-Group attribute");
 652                         sql_grouplist_free(&group_list);
 653                         return -1;
 654                 }
 655                 pairadd(&request->packet->vps, sql_group);
 656                 if (!radius_xlat(querystr, sizeof(querystr), inst->config->authorize_group_check_query, request, sql_escape_func, inst)) {
 657                         radlog_request(L_ERR, 0, request,
 658                                        "Error generating query; rejecting user");
 659                         /* Remove the grouup we added above */
 660                         pairdelete(&request->packet->vps, PW_SQL_GROUP, 0, -1);
 661                         sql_grouplist_free(&group_list);
 662                         return -1;
 663                 }
 664                 rows = sql_getvpdata(inst, &sqlsocket, &check_tmp, querystr);
 665                 if (rows < 0) {
 666                         radlog_request(L_ERR, 0, request, "Error retrieving check pairs for group %s",
 667                                group_list_tmp->groupname);
 668                         /* Remove the grouup we added above */
 669                         pairdelete(&request->packet->vps, PW_SQL_GROUP, 0, -1);
 670                         pairfree(&check_tmp);
 671                         sql_grouplist_free(&group_list);
 672                         return -1;
 673                 } else if (rows > 0) {
 674                         /*
 675                          *      Only do this if *some* check pairs were returned
 676                          */
 677                         if (paircompare(request, request->packet->vps, check_tmp, &request->reply->vps) == 0) {
 678                                 found = 1;
 679                                 RDEBUG2("User found in group %s",
 680                                         group_list_tmp->groupname);
 681                                 /*
 682                                  *      Now get the reply pairs since the paircompare matched
 683                                  */
 684                                 if (!radius_xlat(querystr, sizeof(querystr), inst->config->authorize_group_reply_query, request, sql_escape_func, inst)) {
 685                                         radlog_request(L_ERR, 0, request, "Error generating query; rejecting user");
 686                                         /* Remove the grouup we added above */
 687                                         pairdelete(&request->packet->vps, PW_SQL_GROUP, 0, -1);
 688                                         pairfree(&check_tmp);
 689                                         sql_grouplist_free(&group_list);
 690                                         return -1;
 691                                 }
 692                                 if (sql_getvpdata(inst, &sqlsocket, &reply_tmp, querystr) < 0) {
 693                                         radlog_request(L_ERR, 0, request, "Error retrieving reply pairs for group %s",
 694                                                group_list_tmp->groupname);
 695                                         /* Remove the grouup we added above */
 696                                         pairdelete(&request->packet->vps, PW_SQL_GROUP, 0, -1);
 697                                         pairfree(&check_tmp);
 698                                         pairfree(&reply_tmp);
 699                                         sql_grouplist_free(&group_list);
 700                                         return -1;
 701                                 }
 702                                 *dofallthrough = fallthrough(reply_tmp);
 703                                 pairxlatmove(request, &request->reply->vps, &reply_tmp);
 704                                 pairxlatmove(request, &request->config_items, &check_tmp);
 705                         }
 706                 } else {
 707                         /*
 708                          *      rows == 0.  This is like having the username on a line
 709                          *      in the user's file with no check vp's.  As such, we treat
 710                          *      it as found and add the reply attributes, so that we
 711                          *      match expected behavior
 712                          */
 713                         found = 1;
 714                         RDEBUG2("User found in group %s",
 715                                 group_list_tmp->groupname);
 716                         /*
 717                          *      Now get the reply pairs since the paircompare matched
 718                          */
 719                         if (!radius_xlat(querystr, sizeof(querystr), inst->config->authorize_group_reply_query, request, sql_escape_func, inst)) {
 720                                 radlog_request(L_ERR, 0, request, "Error generating query; rejecting user");
 721                                 /* Remove the grouup we added above */
 722                                 pairdelete(&request->packet->vps, PW_SQL_GROUP, 0, -1);
 723                                 pairfree(&check_tmp);
 724                                 sql_grouplist_free(&group_list);
 725                                 return -1;
 726                         }
 727                         if (sql_getvpdata(inst, &sqlsocket, &reply_tmp, querystr) < 0) {
 728                                 radlog_request(L_ERR, 0, request, "Error retrieving reply pairs for group %s",
 729                                        group_list_tmp->groupname);
 730                                 /* Remove the grouup we added above */
 731                                 pairdelete(&request->packet->vps, PW_SQL_GROUP, 0, -1);
 732                                 pairfree(&check_tmp);
 733                                 pairfree(&reply_tmp);
 734                                 sql_grouplist_free(&group_list);
 735                                 return -1;
 736                         }
 737                         *dofallthrough = fallthrough(reply_tmp);
 738                         pairxlatmove(request, &request->reply->vps, &reply_tmp);
 739                         pairxlatmove(request, &request->config_items, &check_tmp);
 740                 }
 741
 742                 /*
 743                  * Delete the Sql-Group we added above
 744                  * And clear out the pairlists
 745                  */
 746                 pairdelete(&request->packet->vps, PW_SQL_GROUP, 0, -1);
 747                 pairfree(&check_tmp);
 748                 pairfree(&reply_tmp);
 749         }
 750
 751         sql_grouplist_free(&group_list);
 752         return found;
 753 }
 754
 755
 756 static int rlm_sql_detach(void *instance)
 757 {
 758         SQL_INST *inst = instance;
 759
 760         paircompare_unregister(PW_SQL_GROUP, sql_groupcmp);
 761
 762         if (inst->config->postauth) free(inst->config->postauth);
 763         if (inst->config->accounting) free(inst->config->accounting);
 764
 765         if (inst->config) {
 766                 int i;
 767
 768                 if (inst->pool) sql_poolfree(inst);
 769
 770                 if (inst->config->xlat_name) {
 771                         xlat_unregister(inst->config->xlat_name, sql_xlat, instance);
 772                         rad_cfree(inst->config->xlat_name);
 773                 }
 774
 775                 /*
 776                  *      Free up dynamically allocated string pointers.
 777                  */
 778                 for (i = 0; module_config[i].name != NULL; i++) {
 779                         char **p;
 780                         if (module_config[i].type != PW_TYPE_STRING_PTR) {
 781                                 continue;
 782                         }
 783
 784                         /*
 785                          *      Treat 'config' as an opaque array of bytes,
 786                          *      and take the offset into it.  There's a
 787                          *      (char*) pointer at that offset, and we want
 788                          *      to point to it.
 789                          */
 790                         p = (char **) (((char *)inst->config) + module_config[i].offset);
 791                         if (!*p) { /* nothing allocated */
 792                                 continue;
 793                         }
 794                         free(*p);
 795                         *p = NULL;
 796                 }
 797                 free(inst->config);
 798                 inst->config = NULL;
 799         }
 800
 801         if (inst->handle) {
 802 #if 0
 803                 /*
 804                  *      FIXME: Call the modules 'destroy' function?
 805                  */
 806                 lt_dlclose(inst->handle);       /* ignore any errors */
 807 #endif
 808         }
 809         free(inst);
 810
 811         return 0;
 812 }
 813
 814 static int parse_sub_section(CONF_SECTION *parent,
 815                              UNUSED SQL_INST *inst,
 816                              sql_acct_section_t **config,
 817                              rlm_components_t comp)
 818 {
 819         CONF_SECTION *cs;
 820
 821         const char *name = section_type_value[comp].section;
 822
 823         cs = cf_section_sub_find(parent, name);
 824         if (!cs) {
 825                 radlog(L_INFO, "Couldn't find configuration for %s. "
 826                        "Will return NOOP for calls from this section.", name);
 827
 828                 return 0;
 829         }
 830
 831         *config = rad_calloc(sizeof(**config));
 832         if (cf_section_parse(cs, *config, acct_section_config) < 0) {
 833                 radlog(L_ERR, "Failed parsing configuration for section %s",
 834                        name);
 835
 836                 free(*config);
 837                 *config = NULL;
 838
 839                 return -1;
 840         }
 841
 842         (*config)->cs = cs;
 843
 844         return 0;
 845 }
 846
 847 static int rlm_sql_instantiate(CONF_SECTION * conf, void **instance)
 848 {
 849         SQL_INST *inst;
 850         const char *xlat_name;
 851
 852         inst = rad_calloc(sizeof(SQL_INST));
 853
 854         /*
 855          *      Export these methods, too.  This avoids RTDL_GLOBAL.
 856          */
 857         inst->sql_set_user              = sql_set_user;
 858         inst->sql_get_socket            = sql_get_socket;
 859         inst->sql_release_socket        = sql_release_socket;
 860         inst->sql_escape_func           = sql_escape_func;
 861         inst->sql_query                 = rlm_sql_query;
 862         inst->sql_select_query          = rlm_sql_select_query;
 863         inst->sql_fetch_row             = rlm_sql_fetch_row;
 864
 865         inst->config = rad_calloc(sizeof(SQL_CONFIG));
 866         inst->cs = conf;
 867
 868         xlat_name = cf_section_name2(conf);
 869         if (xlat_name == NULL) {
 870                 xlat_name = cf_section_name1(conf);
 871         } else {
 872                 char *group_name;
 873                 DICT_ATTR *dattr;
 874                 ATTR_FLAGS flags;
 875
 876                 /*
 877                  *      Allocate room for <instance>-SQL-Group
 878                  */
 879                 group_name = rad_malloc((strlen(xlat_name) + 1 + 11) * sizeof(char));
 880                 sprintf(group_name,"%s-SQL-Group", xlat_name);
 881                 DEBUG("rlm_sql (%s): Creating new attribute %s",
 882                       xlat_name, group_name);
 883
 884                 memset(&flags, 0, sizeof(flags));
 885                 dict_addattr(group_name, 0, PW_TYPE_STRING, -1, flags);
 886                 dattr = dict_attrbyname(group_name);
 887                 if (dattr == NULL){
 888                         radlog(L_ERR, "rlm_sql (%s): Failed to create "
 889                                "attribute %s", xlat_name, group_name);
 890
 891                         free(group_name);
 892
 893                         goto error;
 894                 }
 895
 896                 if (inst->config->groupmemb_query &&
 897                     inst->config->groupmemb_query[0]) {
 898                         DEBUG("rlm_sql (%s): Registering sql_groupcmp for %s",
 899                               xlat_name, group_name);
 900                         paircompare_register(dattr->attr, PW_USER_NAME,
 901                                              sql_groupcmp, inst);
 902                 }
 903
 904                 free(group_name);
 905         }
 906
 907         rad_assert(xlat_name);
 908
 909
 910         /*
 911          *      Register the SQL xlat function
 912          */
 913         inst->config->xlat_name = strdup(xlat_name);
 914         xlat_register(xlat_name, sql_xlat, inst);
 915
 916         /*
 917          *      If the configuration parameters can't be parsed, then fail.
 918          */
 919         if ((cf_section_parse(conf, inst->config, module_config) < 0) ||
 920             (parse_sub_section(conf, inst,
 921                                &inst->config->accounting,
 922                                RLM_COMPONENT_ACCT) < 0) ||
 923             (parse_sub_section(conf, inst,
 924                                &inst->config->postauth,
 925                                RLM_COMPONENT_POST_AUTH) < 0)) {
 926                 radlog(L_ERR, "rlm_sql (%s): Failed parsing configuration",
 927                        inst->config->xlat_name);
 928                 goto error;
 929         }
 930
 931         /*
 932          *      Sanity check for crazy people.
 933          */
 934         if (strncmp(inst->config->sql_driver, "rlm_sql_", 8) != 0) {
 935                 radlog(L_ERR, "rlm_sql (%s): \"%s\" is NOT an SQL driver!",
 936                        inst->config->xlat_name, inst->config->sql_driver);
 937                 goto error;
 938         }
 939
 940         /*
 941          *      Load the appropriate driver for our database
 942          */
 943         inst->handle = lt_dlopenext(inst->config->sql_driver);
 944         if (inst->handle == NULL) {
 945                 radlog(L_ERR, "Could not link driver %s: %s",
 946                        inst->config->sql_driver,
 947                        lt_dlerror());
 948                 radlog(L_ERR, "Make sure it (and all its dependent libraries!)"
 949                        "are in the search path of your system's ld.");
 950
 951                 goto error;
 952         }
 953
 954         inst->module = (rlm_sql_module_t *) lt_dlsym(inst->handle,
 955                                                      inst->config->sql_driver);
 956         if (!inst->module) {
 957                 radlog(L_ERR, "Could not link symbol %s: %s",
 958                        inst->config->sql_driver,
 959                        lt_dlerror());
 960
 961                 goto error;
 962         }
 963
 964         radlog(L_INFO, "rlm_sql (%s): Driver %s (module %s) loaded and linked",
 965                inst->config->xlat_name, inst->config->sql_driver,
 966                inst->module->name);
 967
 968         /*
 969          *      Initialise the connection pool for this instance
 970          */
 971         radlog(L_INFO, "rlm_sql (%s): Attempting to connect to %s@%s:%s/%s",
 972                inst->config->xlat_name, inst->config->sql_login,
 973                inst->config->sql_server, inst->config->sql_port,
 974                inst->config->sql_db);
 975
 976         if (sql_init_socketpool(inst) < 0)
 977                 goto error;
 978
 979         if (inst->config->groupmemb_query &&
 980             inst->config->groupmemb_query[0]) {
 981                 paircompare_register(PW_SQL_GROUP, PW_USER_NAME, sql_groupcmp, inst);
 982         }
 983
 984         if (inst->config->do_clients) {
 985                 if (generate_sql_clients(inst) == -1){
 986                         radlog(L_ERR, "Failed to load clients from SQL.");
 987
 988                         goto error;
 989                 }
 990         }
 991
 992         *instance = inst;
 993
 994         return RLM_MODULE_OK;
 995
 996         error:
 997         rlm_sql_detach(inst);
 998
 999         return -1;
1000 }
1001
1002
1003 static int rlm_sql_authorize(void *instance, REQUEST * request)
1004 {
1005         int ret = RLM_MODULE_NOTFOUND;
1006
1007         SQL_INST *inst = instance;
1008         SQLSOCK  *sqlsocket;
1009
1010         VALUE_PAIR *check_tmp = NULL;
1011         VALUE_PAIR *reply_tmp = NULL;
1012         VALUE_PAIR *user_profile = NULL;
1013
1014         int     dofallthrough = 1;
1015         int     rows;
1016
1017         char    querystr[MAX_QUERY_LEN];
1018
1019         /*
1020          *  Set, escape, and check the user attr here
1021          */
1022         if (sql_set_user(inst, request, NULL) < 0)
1023                 return RLM_MODULE_FAIL;
1024
1025         /*
1026          *  Reserve a socket
1027          *
1028          *  After this point use goto error or goto release to cleanup sockets
1029          *  temporary pairlists and temporary attributes.
1030          */
1031         sqlsocket = sql_get_socket(inst);
1032         if (sqlsocket == NULL)
1033                 goto error;
1034
1035         /*
1036          *  Query the check table to find any conditions associated with
1037          *  this user/realm/whatever...
1038          */
1039         if (inst->config->authorize_check_query &&
1040             *inst->config->authorize_check_query) {
1041                 if (!radius_xlat(querystr, sizeof(querystr), inst->config->authorize_check_query, request, sql_escape_func, inst)) {
1042                         radlog_request(L_ERR, 0, request, "Error generating query; rejecting user");
1043
1044                         goto error;
1045                 }
1046
1047                 rows = sql_getvpdata(inst, &sqlsocket, &check_tmp, querystr);
1048                 if (rows < 0) {
1049                         radlog_request(L_ERR, 0, request, "SQL query error; rejecting user");
1050
1051                         goto error;
1052                 }
1053
1054                 /*
1055                  *  Only do this if *some* check pairs were returned
1056                  */
1057                 if ((rows > 0) &&
1058                     (paircompare(request, request->packet->vps, check_tmp, &request->reply->vps) == 0)) {
1059                         RDEBUG2("User found in radcheck table");
1060
1061                         pairxlatmove(request, &request->config_items, &check_tmp);
1062
1063                         ret = RLM_MODULE_OK;
1064                 }
1065
1066                 /*
1067                  *  We only process reply table items if check conditions
1068                  *  were verified
1069                  */
1070                 else
1071                         goto skipreply;
1072         }
1073
1074         if (inst->config->authorize_reply_query &&
1075             *inst->config->authorize_reply_query) {
1076                 /*
1077                  *  Now get the reply pairs since the paircompare matched
1078                  */
1079                 if (!radius_xlat(querystr, sizeof(querystr), inst->config->authorize_reply_query, request, sql_escape_func, inst)) {
1080                         radlog_request(L_ERR, 0, request, "Error generating query; rejecting user");
1081
1082                         goto error;
1083                 }
1084
1085                 rows = sql_getvpdata(inst, &sqlsocket, &reply_tmp, querystr);
1086                 if (rows < 0) {
1087                         radlog_request(L_ERR, 0, request, "SQL query error; rejecting user");
1088
1089                         goto error;
1090                 }
1091
1092                 if (rows > 0) {
1093                         if (!inst->config->read_groups)
1094                                 dofallthrough = fallthrough(reply_tmp);
1095
1096                         pairxlatmove(request, &request->reply->vps, &reply_tmp);
1097
1098                         ret = RLM_MODULE_OK;
1099                 }
1100         }
1101
1102         skipreply:
1103
1104         /*
1105          *  Clear out the pairlists
1106          */
1107         pairfree(&check_tmp);
1108         pairfree(&reply_tmp);
1109
1110         /*
1111          *  dofallthrough is set to 1 by default so that if the user information
1112          *  is not found, we will still process groups.  If the user information,
1113          *  however, *is* found, Fall-Through must be set in order to process
1114          *  the groups as well.
1115          */
1116         if (dofallthrough) {
1117                 rows = rlm_sql_process_groups(inst, request, sqlsocket, &dofallthrough);
1118                 if (rows < 0) {
1119                         radlog_request(L_ERR, 0, request, "Error processing groups; rejecting user");
1120
1121                         goto error;
1122                 }
1123
1124                 if (rows > 0)
1125                         ret = RLM_MODULE_OK;
1126         }
1127
1128         /*
1129          *  Repeat the above process with the default profile or User-Profile
1130          */
1131         if (dofallthrough) {
1132                 /*
1133                  *  Check for a default_profile or for a User-Profile.
1134                  */
1135                 user_profile = pairfind(request->config_items, PW_USER_PROFILE, 0);
1136
1137                 const char *profile = user_profile ?
1138                                       user_profile->vp_strvalue :
1139                                       inst->config->default_profile;
1140
1141                 if (!profile || !*profile)
1142                         goto release;
1143
1144                 RDEBUG("Checking profile %s", profile);
1145
1146                 if (sql_set_user(inst, request, profile) < 0) {
1147                         radlog_request(L_ERR, 0, request, "Error setting profile; rejecting user");
1148
1149                         goto error;
1150                 }
1151
1152                 rows = rlm_sql_process_groups(inst, request, sqlsocket, &dofallthrough);
1153                 if (rows < 0) {
1154                         radlog_request(L_ERR, 0, request, "Error processing profile groups; rejecting user");
1155
1156                         goto error;
1157                 }
1158
1159                 if (rows > 0)
1160                         ret = RLM_MODULE_OK;
1161         }
1162
1163         goto release;
1164
1165         error:
1166         ret = RLM_MODULE_FAIL;
1167
1168         release:
1169         sql_release_socket(inst, sqlsocket);
1170
1171         pairfree(&check_tmp);
1172         pairfree(&reply_tmp);
1173
1174         return ret;
1175 }
1176
1177 /*
1178  *      Generic function for failing between a bunch of queries.
1179  *
1180  *      Uses the same principle as rlm_linelog, expanding the 'reference' config
1181  *      item using xlat to figure out what query it should execute.
1182  *
1183  *      If the reference matches multiple config items, and a query fails or
1184  *      doesn't update any rows, the next matching config item is used.
1185  *
1186  */
1187 static int acct_redundant(SQL_INST *inst, REQUEST *request,
1188                           sql_acct_section_t *section)
1189 {
1190         int     ret = RLM_MODULE_OK;
1191
1192         SQLSOCK *sqlsocket = NULL;
1193         int     sql_ret;
1194         int     numaffected = 0;
1195
1196         CONF_ITEM  *item;
1197         CONF_PAIR  *pair;
1198         const char *attr = NULL;
1199         const char *value;
1200
1201         char    path[MAX_STRING_LEN];
1202         char    querystr[MAX_QUERY_LEN];
1203
1204         char    *p = path;
1205
1206         rad_assert(section);
1207
1208         if (section->reference[0] != '.')
1209                 *p++ = '.';
1210
1211         if (!radius_xlat(p, (sizeof(path) - (p - path)) - 1,
1212                         section->reference, request, NULL, NULL))
1213                 return RLM_MODULE_FAIL;
1214
1215         item = cf_reference_item(NULL, section->cs, path);
1216         if (!item)
1217                 return RLM_MODULE_FAIL;
1218
1219         if (cf_item_is_section(item)){
1220                 radlog(L_ERR, "Sections are not supported as references");
1221
1222                 return RLM_MODULE_FAIL;
1223         }
1224
1225         pair = cf_itemtopair(item);
1226         attr = cf_pair_attr(pair);
1227
1228         RDEBUG2("Using query template '%s'", attr);
1229
1230         sqlsocket = sql_get_socket(inst);
1231         if (sqlsocket == NULL)
1232                 return RLM_MODULE_FAIL;
1233
1234         sql_set_user(inst, request, NULL);
1235
1236         while (TRUE) {
1237                 value = cf_pair_value(pair);
1238                 if (!value) {
1239                         RDEBUG("Ignoring null query");
1240                         ret = RLM_MODULE_NOOP;
1241
1242                         goto release;
1243                 }
1244
1245                 radius_xlat(querystr, sizeof(querystr), value, request,
1246                             sql_escape_func, inst);
1247                 if (!*querystr) {
1248                         RDEBUG("Ignoring null query");
1249                         ret = RLM_MODULE_NOOP;
1250
1251                         goto release;
1252                 }
1253
1254                 rlm_sql_query_log(inst, request, section, querystr);
1255
1256                 /*
1257                  *  If rlm_sql_query cannot use the socket it'll try and
1258                  *  reconnect. Reconnecting will automatically release
1259                  *  the current socket, and try to select a new one.
1260                  *
1261                  *  If we get SQL_DOWN it means all connections in the pool
1262                  *  were exhausted, and we couldn't create a new connection,
1263                  *  so we do not need to call sql_release_socket.
1264                  */
1265                 sql_ret = rlm_sql_query(&sqlsocket, inst, querystr);
1266                 if (sql_ret == SQL_DOWN)
1267                         return RLM_MODULE_FAIL;
1268
1269                 rad_assert(sqlsocket);
1270
1271                 /*
1272                  *  Assume all other errors are incidental, and just meant our
1273                  *  operation failed and its not a client or SQL syntax error.
1274                  */
1275                 if (sql_ret == 0) {
1276                         numaffected = (inst->module->sql_affected_rows)
1277                                         (sqlsocket, inst->config);
1278                         if (numaffected > 0)
1279                                 break;
1280
1281                         RDEBUG("No records updated");
1282                 }
1283
1284                 (inst->module->sql_finish_query)(sqlsocket, inst->config);
1285
1286                 /*
1287                  *  We assume all entries with the same name form a redundant
1288                  *  set of queries.
1289                  */
1290                 pair = cf_pair_find_next(section->cs, pair, attr);
1291
1292                 if (!pair) {
1293                         RDEBUG("No additional queries configured");
1294
1295                         ret = RLM_MODULE_NOOP;
1296
1297                         goto release;
1298                 }
1299
1300                 RDEBUG("Trying next query...");
1301         }
1302
1303         (inst->module->sql_finish_query)(sqlsocket, inst->config);
1304
1305         release:
1306         sql_release_socket(inst, sqlsocket);
1307
1308         return ret;
1309 }
1310
1311 #ifdef WITH_ACCOUNTING
1312
1313 /*
1314  *      Accounting: Insert or update session data in our sql table
1315  */
1316 static int rlm_sql_accounting(void *instance, REQUEST * request) {
1317         SQL_INST *inst = instance;
1318
1319         if (inst->config->accounting) {
1320                 return acct_redundant(inst, request, inst->config->accounting);
1321         }
1322
1323         return RLM_MODULE_NOOP;
1324 }
1325
1326 #endif
1327
1328 #ifdef WITH_SESSION_MGMT
1329 /*
1330  *        See if a user is already logged in. Sets request->simul_count to the
1331  *        current session count for this user.
1332  *
1333  *        Check twice. If on the first pass the user exceeds his
1334  *        max. number of logins, do a second pass and validate all
1335  *        logins by querying the terminal server (using eg. SNMP).
1336  */
1337
1338 static int rlm_sql_checksimul(void *instance, REQUEST * request) {
1339         SQLSOCK         *sqlsocket;
1340         SQL_INST        *inst = instance;
1341         SQL_ROW         row;
1342         char            querystr[MAX_QUERY_LEN];
1343         int             check = 0;
1344         uint32_t        ipno = 0;
1345         char            *call_num = NULL;
1346         VALUE_PAIR      *vp;
1347         int             ret;
1348         uint32_t        nas_addr = 0;
1349         int             nas_port = 0;
1350
1351         /* If simul_count_query is not defined, we don't do any checking */
1352         if (!inst->config->simul_count_query ||
1353             (inst->config->simul_count_query[0] == 0)) {
1354                 return RLM_MODULE_NOOP;
1355         }
1356
1357         if((request->username == NULL) || (request->username->length == 0)) {
1358                 radlog_request(L_ERR, 0, request,
1359                                            "Zero Length username not permitted\n");
1360                 return RLM_MODULE_INVALID;
1361         }
1362
1363
1364         if(sql_set_user(inst, request, NULL) < 0)
1365                 return RLM_MODULE_FAIL;
1366
1367         radius_xlat(querystr, sizeof(querystr), inst->config->simul_count_query, request, sql_escape_func, inst);
1368
1369         /* initialize the sql socket */
1370         sqlsocket = sql_get_socket(inst);
1371         if(sqlsocket == NULL)
1372                 return RLM_MODULE_FAIL;
1373
1374         if(rlm_sql_select_query(&sqlsocket, inst, querystr)) {
1375                 sql_release_socket(inst, sqlsocket);
1376                 return RLM_MODULE_FAIL;
1377         }
1378
1379         ret = rlm_sql_fetch_row(&sqlsocket, inst);
1380         if (ret != 0) {
1381                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1382                 sql_release_socket(inst, sqlsocket);
1383                 return RLM_MODULE_FAIL;
1384         }
1385
1386         row = sqlsocket->row;
1387         if (row == NULL) {
1388                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1389                 sql_release_socket(inst, sqlsocket);
1390                 return RLM_MODULE_FAIL;
1391         }
1392
1393         request->simul_count = atoi(row[0]);
1394         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1395
1396         if(request->simul_count < request->simul_max) {
1397                 sql_release_socket(inst, sqlsocket);
1398                 return RLM_MODULE_OK;
1399         }
1400
1401         /*
1402          *      Looks like too many sessions, so let's start verifying
1403          *      them, unless told to rely on count query only.
1404          */
1405         if (!inst->config->simul_verify_query ||
1406             (inst->config->simul_verify_query[0] == '\0')) {
1407                 sql_release_socket(inst, sqlsocket);
1408                 return RLM_MODULE_OK;
1409         }
1410
1411         radius_xlat(querystr, sizeof(querystr), inst->config->simul_verify_query, request, sql_escape_func, inst);
1412         if(rlm_sql_select_query(&sqlsocket, inst, querystr)) {
1413                 sql_release_socket(inst, sqlsocket);
1414                 return RLM_MODULE_FAIL;
1415         }
1416
1417         /*
1418          *      Setup some stuff, like for MPP detection.
1419          */
1420         request->simul_count = 0;
1421
1422         if ((vp = pairfind(request->packet->vps, PW_FRAMED_IP_ADDRESS, 0)) != NULL)
1423                 ipno = vp->vp_ipaddr;
1424         if ((vp = pairfind(request->packet->vps, PW_CALLING_STATION_ID, 0)) != NULL)
1425                 call_num = vp->vp_strvalue;
1426
1427
1428         while (rlm_sql_fetch_row(&sqlsocket, inst) == 0) {
1429                 row = sqlsocket->row;
1430                 if (row == NULL)
1431                         break;
1432                 if (!row[2]){
1433                         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1434                         sql_release_socket(inst, sqlsocket);
1435                         RDEBUG("Cannot zap stale entry. No username present in entry.", inst->config->xlat_name);
1436                         return RLM_MODULE_FAIL;
1437                 }
1438                 if (!row[1]){
1439                         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1440                         sql_release_socket(inst, sqlsocket);
1441                         RDEBUG("Cannot zap stale entry. No session id in entry.", inst->config->xlat_name);
1442                         return RLM_MODULE_FAIL;
1443                 }
1444                 if (row[3])
1445                         nas_addr = inet_addr(row[3]);
1446                 if (row[4])
1447                         nas_port = atoi(row[4]);
1448
1449                 check = rad_check_ts(nas_addr, nas_port, row[2], row[1]);
1450
1451                 if (check == 0) {
1452                         /*
1453                          *      Stale record - zap it.
1454                          */
1455                         if (inst->config->deletestalesessions == TRUE) {
1456                                 uint32_t framed_addr = 0;
1457                                 char proto = 0;
1458                                 int sess_time = 0;
1459
1460                                 if (row[5])
1461                                         framed_addr = inet_addr(row[5]);
1462                                 if (row[7]){
1463                                         if (strcmp(row[7], "PPP") == 0)
1464                                                 proto = 'P';
1465                                         else if (strcmp(row[7], "SLIP") == 0)
1466                                                 proto = 'S';
1467                                 }
1468                                 if (row[8])
1469                                         sess_time = atoi(row[8]);
1470                                 session_zap(request, nas_addr, nas_port,
1471                                             row[2], row[1], framed_addr,
1472                                             proto, sess_time);
1473                         }
1474                 }
1475                 else if (check == 1) {
1476                         /*
1477                          *      User is still logged in.
1478                          */
1479                         ++request->simul_count;
1480
1481                         /*
1482                          *      Does it look like a MPP attempt?
1483                          */
1484                         if (row[5] && ipno && inet_addr(row[5]) == ipno)
1485                                 request->simul_mpp = 2;
1486                         else if (row[6] && call_num &&
1487                                 !strncmp(row[6],call_num,16))
1488                                 request->simul_mpp = 2;
1489                 }
1490                 else {
1491                         /*
1492                          *      Failed to check the terminal server for
1493                          *      duplicate logins: return an error.
1494                          */
1495                         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1496                         sql_release_socket(inst, sqlsocket);
1497                         radlog_request(L_ERR, 0, request, "Failed to check the terminal server for user '%s'.", row[2]);
1498                         return RLM_MODULE_FAIL;
1499                 }
1500         }
1501
1502         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1503         sql_release_socket(inst, sqlsocket);
1504
1505         /*
1506          *      The Auth module apparently looks at request->simul_count,
1507          *      not the return value of this module when deciding to deny
1508          *      a call for too many sessions.
1509          */
1510         return RLM_MODULE_OK;
1511 }
1512 #endif
1513
1514 /*
1515  *      Postauth: Write a record of the authentication attempt
1516  */
1517 static int rlm_sql_postauth(void *instance, REQUEST * request) {
1518         SQL_INST *inst = instance;
1519
1520         if (inst->config->postauth) {
1521                 return acct_redundant(inst, request, inst->config->postauth);
1522         }
1523
1524         return RLM_MODULE_NOOP;
1525 }
1526
1527 /*
1528  *      Execute postauth_query after authentication
1529  */
1530
1531
1532 /* globally exported name */
1533 module_t rlm_sql = {
1534         RLM_MODULE_INIT,
1535         "SQL",
1536         RLM_TYPE_THREAD_SAFE,   /* type: reserved */
1537         rlm_sql_instantiate,    /* instantiation */
1538         rlm_sql_detach,         /* detach */
1539         {
1540                 NULL,                   /* authentication */
1541                 rlm_sql_authorize,      /* authorization */
1542                 NULL,                   /* preaccounting */
1543 #ifdef WITH_ACCOUNTING
1544                 rlm_sql_accounting,     /* accounting */
1545 #else
1546                 NULL,
1547 #endif
1548 #ifdef WITH_SESSION_MGMT
1549                 rlm_sql_checksimul,     /* checksimul */
1550 #else
1551                 NULL,
1552 #endif
1553                 NULL,                   /* pre-proxy */
1554                 NULL,                   /* post-proxy */
1555                 rlm_sql_postauth        /* post-auth */
1556         },
1557 };