src/modules/rlm_sql/rlm_sql.c

   1 /*
   2  * rlm_sql.c            SQL Module
   3  *              Main SQL module file. Most ICRADIUS code is located in sql.c
   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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  *
  21  * Copyright 2000,2006  The FreeRADIUS server project
  22  * Copyright 2000  Mike Machado <mike@innercite.com>
  23  * Copyright 2000  Alan DeKok <aland@ox.org>
  24  */
  25
  26 #include <freeradius-devel/ident.h>
  27 RCSID("$Id$")
  28
  29 #include <freeradius-devel/radiusd.h>
  30 #include <freeradius-devel/modules.h>
  31 #include <freeradius-devel/rad_assert.h>
  32
  33 #include <sys/stat.h>
  34
  35 #include "rlm_sql.h"
  36
  37 static char *allowed_chars = NULL;
  38
  39 static const CONF_PARSER module_config[] = {
  40         {"driver",PW_TYPE_STRING_PTR,
  41          offsetof(SQL_CONFIG,sql_driver), NULL, "mysql"},
  42         {"server",PW_TYPE_STRING_PTR,
  43          offsetof(SQL_CONFIG,sql_server), NULL, "localhost"},
  44         {"port",PW_TYPE_STRING_PTR,
  45          offsetof(SQL_CONFIG,sql_port), NULL, ""},
  46         {"login", PW_TYPE_STRING_PTR,
  47          offsetof(SQL_CONFIG,sql_login), NULL, ""},
  48         {"password", PW_TYPE_STRING_PTR,
  49          offsetof(SQL_CONFIG,sql_password), NULL, ""},
  50         {"radius_db", PW_TYPE_STRING_PTR,
  51          offsetof(SQL_CONFIG,sql_db), NULL, "radius"},
  52         {"read_groups", PW_TYPE_BOOLEAN,
  53          offsetof(SQL_CONFIG,read_groups), NULL, "yes"},
  54         {"sqltrace", PW_TYPE_BOOLEAN,
  55          offsetof(SQL_CONFIG,sqltrace), NULL, "no"},
  56         {"sqltracefile", PW_TYPE_STRING_PTR,
  57          offsetof(SQL_CONFIG,tracefile), NULL, SQLTRACEFILE},
  58         {"readclients", PW_TYPE_BOOLEAN,
  59          offsetof(SQL_CONFIG,do_clients), NULL, "no"},
  60         {"deletestalesessions", PW_TYPE_BOOLEAN,
  61          offsetof(SQL_CONFIG,deletestalesessions), NULL, "yes"},
  62         {"num_sql_socks", PW_TYPE_INTEGER,
  63          offsetof(SQL_CONFIG,num_sql_socks), NULL, "5"},
  64         {"sql_user_name", PW_TYPE_STRING_PTR,
  65          offsetof(SQL_CONFIG,query_user), NULL, ""},
  66         {"default_user_profile", PW_TYPE_STRING_PTR,
  67          offsetof(SQL_CONFIG,default_profile), NULL, ""},
  68         {"nas_query", PW_TYPE_STRING_PTR,
  69          offsetof(SQL_CONFIG,nas_query), NULL, "SELECT id,nasname,shortname,type,secret FROM nas"},
  70         {"authorize_check_query", PW_TYPE_STRING_PTR,
  71          offsetof(SQL_CONFIG,authorize_check_query), NULL, ""},
  72         {"authorize_reply_query", PW_TYPE_STRING_PTR,
  73          offsetof(SQL_CONFIG,authorize_reply_query), NULL, NULL},
  74         {"authorize_group_check_query", PW_TYPE_STRING_PTR,
  75          offsetof(SQL_CONFIG,authorize_group_check_query), NULL, ""},
  76         {"authorize_group_reply_query", PW_TYPE_STRING_PTR,
  77          offsetof(SQL_CONFIG,authorize_group_reply_query), NULL, ""},
  78         {"accounting_onoff_query", PW_TYPE_STRING_PTR,
  79          offsetof(SQL_CONFIG,accounting_onoff_query), NULL, ""},
  80         {"accounting_update_query", PW_TYPE_STRING_PTR,
  81          offsetof(SQL_CONFIG,accounting_update_query), NULL, ""},
  82         {"accounting_update_query_alt", PW_TYPE_STRING_PTR,
  83          offsetof(SQL_CONFIG,accounting_update_query_alt), NULL, ""},
  84         {"accounting_start_query", PW_TYPE_STRING_PTR,
  85          offsetof(SQL_CONFIG,accounting_start_query), NULL, ""},
  86         {"accounting_start_query_alt", PW_TYPE_STRING_PTR,
  87          offsetof(SQL_CONFIG,accounting_start_query_alt), NULL, ""},
  88         {"accounting_stop_query", PW_TYPE_STRING_PTR,
  89          offsetof(SQL_CONFIG,accounting_stop_query), NULL, ""},
  90         {"accounting_stop_query_alt", PW_TYPE_STRING_PTR,
  91          offsetof(SQL_CONFIG,accounting_stop_query_alt), NULL, ""},
  92         {"group_membership_query", PW_TYPE_STRING_PTR,
  93          offsetof(SQL_CONFIG,groupmemb_query), NULL, NULL},
  94         {"connect_failure_retry_delay", PW_TYPE_INTEGER,
  95          offsetof(SQL_CONFIG,connect_failure_retry_delay), NULL, "60"},
  96         {"simul_count_query", PW_TYPE_STRING_PTR,
  97          offsetof(SQL_CONFIG,simul_count_query), NULL, ""},
  98         {"simul_verify_query", PW_TYPE_STRING_PTR,
  99          offsetof(SQL_CONFIG,simul_verify_query), NULL, ""},
 100         {"postauth_query", PW_TYPE_STRING_PTR,
 101          offsetof(SQL_CONFIG,postauth_query), NULL, ""},
 102         {"safe-characters", PW_TYPE_STRING_PTR,
 103          offsetof(SQL_CONFIG,allowed_chars), NULL,
 104         "@abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.-_: /"},
 105
 106         {NULL, -1, 0, NULL, NULL}
 107 };
 108
 109 /*
 110  *      Fall-Through checking function from rlm_files.c
 111  */
 112 static int fallthrough(VALUE_PAIR *vp)
 113 {
 114         VALUE_PAIR *tmp;
 115         tmp = pairfind(vp, PW_FALL_THROUGH);
 116
 117         return tmp ? tmp->vp_integer : 0;
 118 }
 119
 120
 121
 122 /*
 123  *      Yucky prototype.
 124  */
 125 static int generate_sql_clients(SQL_INST *inst);
 126 static size_t sql_escape_func(char *out, size_t outlen, const char *in);
 127
 128 /*
 129  *      sql xlat function. Right now only SELECTs are supported. Only
 130  *      the first element of the SELECT result will be used.
 131  */
 132 static int sql_xlat(void *instance, REQUEST *request,
 133                     char *fmt, char *out, size_t freespace,
 134                     UNUSED RADIUS_ESCAPE_STRING func)
 135 {
 136         SQLSOCK *sqlsocket;
 137         SQL_ROW row;
 138         SQL_INST *inst = instance;
 139         char querystr[MAX_QUERY_LEN];
 140         char sqlusername[MAX_STRING_LEN];
 141         size_t ret = 0;
 142
 143         RDEBUG("sql_xlat");
 144
 145         /*
 146          * Add SQL-User-Name attribute just in case it is needed
 147          *  We could search the string fmt for SQL-User-Name to see if this is
 148          *  needed or not
 149          */
 150         sql_set_user(inst, request, sqlusername, NULL);
 151         /*
 152          * Do an xlat on the provided string (nice recursive operation).
 153          */
 154         if (!radius_xlat(querystr, sizeof(querystr), fmt, request, sql_escape_func)) {
 155                 radlog(L_ERR, "rlm_sql (%s): xlat failed.",
 156                        inst->config->xlat_name);
 157                 return 0;
 158         }
 159
 160         query_log(request, inst,querystr);
 161         sqlsocket = sql_get_socket(inst);
 162         if (sqlsocket == NULL)
 163                 return 0;
 164         if (rlm_sql_select_query(sqlsocket,inst,querystr)){
 165                 radlog(L_ERR, "rlm_sql (%s): database query error, %s: %s",
 166                        inst->config->xlat_name,querystr,
 167                        (inst->module->sql_error)(sqlsocket, inst->config));
 168                 sql_release_socket(inst,sqlsocket);
 169                 return 0;
 170         }
 171
 172         ret = rlm_sql_fetch_row(sqlsocket, inst);
 173
 174         if (ret) {
 175                 RDEBUG("SQL query did not succeed");
 176                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 177                 sql_release_socket(inst,sqlsocket);
 178                 return 0;
 179         }
 180
 181         row = sqlsocket->row;
 182         if (row == NULL) {
 183                 RDEBUG("SQL query did not return any results");
 184                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 185                 sql_release_socket(inst,sqlsocket);
 186                 return 0;
 187         }
 188
 189         if (row[0] == NULL){
 190                 RDEBUG("row[0] returned NULL");
 191                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 192                 sql_release_socket(inst,sqlsocket);
 193                 return 0;
 194         }
 195         ret = strlen(row[0]);
 196         if (ret >= freespace){
 197                 RDEBUG("Insufficient string space");
 198                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 199                 sql_release_socket(inst,sqlsocket);
 200                 return 0;
 201         }
 202
 203         strlcpy(out,row[0],freespace);
 204
 205         RDEBUG("sql_xlat finished");
 206
 207         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 208         sql_release_socket(inst,sqlsocket);
 209         return ret;
 210 }
 211
 212 static int generate_sql_clients(SQL_INST *inst)
 213 {
 214         SQLSOCK *sqlsocket;
 215         SQL_ROW row;
 216         char querystr[MAX_QUERY_LEN];
 217         RADCLIENT *c;
 218         char *prefix_ptr = NULL;
 219         unsigned int i = 0;
 220         int numf = 0;
 221
 222         DEBUG("rlm_sql (%s): Processing generate_sql_clients",
 223               inst->config->xlat_name);
 224
 225         /* NAS query isn't xlat'ed */
 226         strlcpy(querystr, inst->config->nas_query, sizeof(querystr));
 227         DEBUG("rlm_sql (%s) in generate_sql_clients: query is %s",
 228               inst->config->xlat_name, querystr);
 229
 230         sqlsocket = sql_get_socket(inst);
 231         if (sqlsocket == NULL)
 232                 return -1;
 233         if (rlm_sql_select_query(sqlsocket,inst,querystr)){
 234                 radlog(L_ERR, "rlm_sql (%s): database query error, %s: %s",
 235                        inst->config->xlat_name,querystr,
 236                        (inst->module->sql_error)(sqlsocket, inst->config));
 237                 sql_release_socket(inst,sqlsocket);
 238                 return -1;
 239         }
 240
 241         while(rlm_sql_fetch_row(sqlsocket, inst) == 0) {
 242                 i++;
 243                 row = sqlsocket->row;
 244                 if (row == NULL)
 245                         break;
 246         /*
 247          *  The return data for each row MUST be in the following order:
 248          *
 249          *  0. Row ID (currently unused)
 250          *  1. Name (or IP address)
 251          *  2. Shortname
 252          *  3. Type
 253          *  4. Secret
 254          *  5. Virtual Server (optional)
 255          */
 256                 if (!row[0]){
 257                         radlog(L_ERR, "rlm_sql (%s): No row id found on pass %d",inst->config->xlat_name,i);
 258                         continue;
 259                 }
 260                 if (!row[1]){
 261                         radlog(L_ERR, "rlm_sql (%s): No nasname found for row %s",inst->config->xlat_name,row[0]);
 262                         continue;
 263                 }
 264                 if (!row[2]){
 265                         radlog(L_ERR, "rlm_sql (%s): No short name found for row %s",inst->config->xlat_name,row[0]);
 266                         continue;
 267                 }
 268                 if (!row[4]){
 269                         radlog(L_ERR, "rlm_sql (%s): No secret found for row %s",inst->config->xlat_name,row[0]);
 270                         continue;
 271                 }
 272
 273                 DEBUG("rlm_sql (%s): Read entry nasname=%s,shortname=%s,secret=%s",inst->config->xlat_name,
 274                         row[1],row[2],row[4]);
 275
 276                 c = rad_malloc(sizeof(*c));
 277                 memset(c, 0, sizeof(*c));
 278
 279 #ifdef WITH_DYNAMIC_CLIENTS
 280                 c->dynamic = 1;
 281 #endif
 282
 283                 /*
 284                  *      Look for prefixes
 285                  */
 286                 c->prefix = -1;
 287                 prefix_ptr = strchr(row[1], '/');
 288                 if (prefix_ptr) {
 289                         c->prefix = atoi(prefix_ptr + 1);
 290                         if ((c->prefix < 0) || (c->prefix > 128)) {
 291                                 radlog(L_ERR, "rlm_sql (%s): Invalid Prefix value '%s' for IP.",
 292                                        inst->config->xlat_name, prefix_ptr + 1);
 293                                 free(c);
 294                                 continue;
 295                         }
 296                         /* Replace '/' with '\0' */
 297                         *prefix_ptr = '\0';
 298                 }
 299
 300                 /*
 301                  *      Always get the numeric representation of IP
 302                  */
 303                 if (ip_hton(row[1], AF_UNSPEC, &c->ipaddr) < 0) {
 304                         radlog(L_CONS|L_ERR, "rlm_sql (%s): Failed to look up hostname %s: %s",
 305                                inst->config->xlat_name,
 306                                row[1], fr_strerror());
 307                         free(c);
 308                         continue;
 309                 } else {
 310                         char buffer[256];
 311                         ip_ntoh(&c->ipaddr, buffer, sizeof(buffer));
 312                         c->longname = strdup(buffer);
 313                 }
 314
 315                 if (c->prefix < 0) switch (c->ipaddr.af) {
 316                 case AF_INET:
 317                         c->prefix = 32;
 318                         break;
 319                 case AF_INET6:
 320                         c->prefix = 128;
 321                         break;
 322                 default:
 323                         break;
 324                 }
 325
 326                 /*
 327                  *      Other values (secret, shortname, nastype, virtual_server)
 328                  */
 329                 c->secret = strdup(row[4]);
 330                 c->shortname = strdup(row[2]);
 331                 if(row[3] != NULL)
 332                         c->nastype = strdup(row[3]);
 333
 334                 numf = (inst->module->sql_num_fields)(sqlsocket, inst->config);
 335                 if ((numf > 5) && (row[5] != NULL)) c->server = strdup(row[5]);
 336
 337                 DEBUG("rlm_sql (%s): Adding client %s (%s, server=%s) to clients list",
 338                       inst->config->xlat_name,
 339                       c->longname,c->shortname, c->server ? c->server : "<none>");
 340                 if (!client_add(NULL, c)) {
 341                         DEBUG("rlm_sql (%s): Failed to add client %s (%s) to clients list.  Maybe there's a duplicate?",
 342                               inst->config->xlat_name,
 343                               c->longname,c->shortname);
 344                         client_free(c);
 345                         return -1;
 346                 }
 347         }
 348         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 349         sql_release_socket(inst, sqlsocket);
 350
 351         return 0;
 352 }
 353
 354
 355 /*
 356  *      Translate the SQL queries.
 357  */
 358 static size_t sql_escape_func(char *out, size_t outlen, const char *in)
 359 {
 360         size_t len = 0;
 361
 362         while (in[0]) {
 363                 /*
 364                  *      Non-printable characters get replaced with their
 365                  *      mime-encoded equivalents.
 366                  */
 367                 if ((in[0] < 32) ||
 368                     strchr(allowed_chars, *in) == NULL) {
 369                         /*
 370                          *      Only 3 or less bytes available.
 371                          */
 372                         if (outlen <= 3) {
 373                                 break;
 374                         }
 375
 376                         snprintf(out, outlen, "=%02X", (unsigned char) in[0]);
 377                         in++;
 378                         out += 3;
 379                         outlen -= 3;
 380                         len += 3;
 381                         continue;
 382                 }
 383
 384                 /*
 385                  *      Only one byte left.
 386                  */
 387                 if (outlen <= 1) {
 388                         break;
 389                 }
 390
 391                 /*
 392                  *      Allowed character.
 393                  */
 394                 *out = *in;
 395                 out++;
 396                 in++;
 397                 outlen--;
 398                 len++;
 399         }
 400         *out = '\0';
 401         return len;
 402 }
 403
 404 /*
 405  *      Set the SQL user name.
 406  *
 407  *      We don't call the escape function here. The resulting string
 408  *      will be escaped later in the queries xlat so we don't need to
 409  *      escape it twice. (it will make things wrong if we have an
 410  *      escape candidate character in the username)
 411  */
 412 int sql_set_user(SQL_INST *inst, REQUEST *request, char *sqlusername, const char *username)
 413 {
 414         VALUE_PAIR *vp=NULL;
 415         char tmpuser[MAX_STRING_LEN];
 416
 417         tmpuser[0] = '\0';
 418         sqlusername[0]= '\0';
 419
 420         /* Remove any user attr we added previously */
 421         pairdelete(&request->packet->vps, PW_SQL_USER_NAME);
 422
 423         if (username != NULL) {
 424                 strlcpy(tmpuser, username, sizeof(tmpuser));
 425         } else if (strlen(inst->config->query_user)) {
 426                 radius_xlat(tmpuser, sizeof(tmpuser), inst->config->query_user, request, NULL);
 427         } else {
 428                 return 0;
 429         }
 430
 431         strlcpy(sqlusername, tmpuser, MAX_STRING_LEN);
 432         RDEBUG2("sql_set_user escaped user --> '%s'", sqlusername);
 433         vp = radius_pairmake(request, &request->packet->vps,
 434                              "SQL-User-Name", NULL, 0);
 435         if (!vp) {
 436                 radlog(L_ERR, "%s", fr_strerror());
 437                 return -1;
 438         }
 439
 440         strlcpy(vp->vp_strvalue, tmpuser, sizeof(vp->vp_strvalue));
 441         vp->length = strlen(vp->vp_strvalue);
 442
 443         return 0;
 444
 445 }
 446
 447
 448 static void sql_grouplist_free (SQL_GROUPLIST **group_list)
 449 {
 450         SQL_GROUPLIST *last;
 451
 452         while(*group_list) {
 453                 last = *group_list;
 454                 *group_list = (*group_list)->next;
 455                 free(last);
 456         }
 457 }
 458
 459
 460 static int sql_get_grouplist (SQL_INST *inst, SQLSOCK *sqlsocket, REQUEST *request, SQL_GROUPLIST **group_list)
 461 {
 462         char    querystr[MAX_QUERY_LEN];
 463         int     num_groups = 0;
 464         SQL_ROW row;
 465         SQL_GROUPLIST   *group_list_tmp;
 466
 467         /* NOTE: sql_set_user should have been run before calling this function */
 468
 469         group_list_tmp = *group_list = NULL;
 470
 471         if (!inst->config->groupmemb_query ||
 472             (inst->config->groupmemb_query[0] == 0))
 473                 return 0;
 474
 475         if (!radius_xlat(querystr, sizeof(querystr), inst->config->groupmemb_query, request, sql_escape_func)) {
 476                 radlog_request(L_ERR, 0, request, "xlat \"%s\" failed.",
 477                                inst->config->groupmemb_query);
 478                 return -1;
 479         }
 480
 481         if (rlm_sql_select_query(sqlsocket, inst, querystr) < 0) {
 482                 radlog_request(L_ERR, 0, request,
 483                                "database query error, %s: %s",
 484                                querystr,
 485                        (inst->module->sql_error)(sqlsocket,inst->config));
 486                 return -1;
 487         }
 488         while (rlm_sql_fetch_row(sqlsocket, inst) == 0) {
 489                 row = sqlsocket->row;
 490                 if (row == NULL)
 491                         break;
 492                 if (row[0] == NULL){
 493                         RDEBUG("row[0] returned NULL");
 494                         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 495                         sql_grouplist_free(group_list);
 496                         return -1;
 497                 }
 498                 if (*group_list == NULL) {
 499                         *group_list = rad_malloc(sizeof(SQL_GROUPLIST));
 500                         group_list_tmp = *group_list;
 501                 } else {
 502                         group_list_tmp->next = rad_malloc(sizeof(SQL_GROUPLIST));
 503                         group_list_tmp = group_list_tmp->next;
 504                 }
 505                 group_list_tmp->next = NULL;
 506                 strlcpy(group_list_tmp->groupname, row[0], MAX_STRING_LEN);
 507         }
 508
 509         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 510
 511         return num_groups;
 512 }
 513
 514
 515 /*
 516  * sql groupcmp function. That way we can do group comparisons (in the users file for example)
 517  * with the group memberships reciding in sql
 518  * The group membership query should only return one element which is the username. The returned
 519  * username will then be checked with the passed check string.
 520  */
 521
 522 static int sql_groupcmp(void *instance, REQUEST *request, VALUE_PAIR *request_vp, VALUE_PAIR *check,
 523                         VALUE_PAIR *check_pairs, VALUE_PAIR **reply_pairs)
 524 {
 525         SQLSOCK *sqlsocket;
 526         SQL_INST *inst = instance;
 527         char sqlusername[MAX_STRING_LEN];
 528         SQL_GROUPLIST *group_list, *group_list_tmp;
 529
 530         check_pairs = check_pairs;
 531         reply_pairs = reply_pairs;
 532         request_vp = request_vp;
 533
 534         RDEBUG("sql_groupcmp");
 535         if (!check || !check->vp_strvalue || !check->length){
 536                 RDEBUG("sql_groupcmp: Illegal group name");
 537                 return 1;
 538         }
 539         if (!request){
 540                 RDEBUG("sql_groupcmp: NULL request");
 541                 return 1;
 542         }
 543         /*
 544          * Set, escape, and check the user attr here
 545          */
 546         if (sql_set_user(inst, request, sqlusername, NULL) < 0)
 547                 return 1;
 548
 549         /*
 550          *      Get a socket for this lookup
 551          */
 552         sqlsocket = sql_get_socket(inst);
 553         if (sqlsocket == NULL) {
 554                 /* Remove the username we (maybe) added above */
 555                 pairdelete(&request->packet->vps, PW_SQL_USER_NAME);
 556                 return 1;
 557         }
 558
 559         /*
 560          *      Get the list of groups this user is a member of
 561          */
 562         if (sql_get_grouplist(inst, sqlsocket, request, &group_list) < 0) {
 563                 radlog_request(L_ERR, 0, request,
 564                                "Error getting group membership");
 565                 /* Remove the username we (maybe) added above */
 566                 pairdelete(&request->packet->vps, PW_SQL_USER_NAME);
 567                 sql_release_socket(inst, sqlsocket);
 568                 return 1;
 569         }
 570
 571         for (group_list_tmp = group_list; group_list_tmp != NULL; group_list_tmp = group_list_tmp->next) {
 572                 if (strcmp(group_list_tmp->groupname, check->vp_strvalue) == 0){
 573                         RDEBUG("sql_groupcmp finished: User is a member of group %s",
 574                                check->vp_strvalue);
 575                         /* Free the grouplist */
 576                         sql_grouplist_free(&group_list);
 577                         /* Remove the username we (maybe) added above */
 578                         pairdelete(&request->packet->vps, PW_SQL_USER_NAME);
 579                         sql_release_socket(inst, sqlsocket);
 580                         return 0;
 581                 }
 582         }
 583
 584         /* Free the grouplist */
 585         sql_grouplist_free(&group_list);
 586         /* Remove the username we (maybe) added above */
 587         pairdelete(&request->packet->vps, PW_SQL_USER_NAME);
 588         sql_release_socket(inst,sqlsocket);
 589
 590         RDEBUG("sql_groupcmp finished: User is NOT a member of group %s",
 591                check->vp_strvalue);
 592
 593         return 1;
 594 }
 595
 596
 597
 598 static int rlm_sql_process_groups(SQL_INST *inst, REQUEST *request, SQLSOCK *sqlsocket, int *dofallthrough)
 599 {
 600         VALUE_PAIR *check_tmp = NULL;
 601         VALUE_PAIR *reply_tmp = NULL;
 602         SQL_GROUPLIST *group_list, *group_list_tmp;
 603         VALUE_PAIR *sql_group = NULL;
 604         char    querystr[MAX_QUERY_LEN];
 605         int found = 0;
 606         int rows;
 607
 608         /*
 609          *      Get the list of groups this user is a member of
 610          */
 611         if (sql_get_grouplist(inst, sqlsocket, request, &group_list) < 0) {
 612                 radlog_request(L_ERR, 0, request, "Error retrieving group list");
 613                 return -1;
 614         }
 615
 616         for (group_list_tmp = group_list; group_list_tmp != NULL && *dofallthrough != 0; group_list_tmp = group_list_tmp->next) {
 617                 /*
 618                  *      Add the Sql-Group attribute to the request list so we know
 619                  *      which group we're retrieving attributes for
 620                  */
 621                 sql_group = pairmake("Sql-Group", group_list_tmp->groupname, T_OP_EQ);
 622                 if (!sql_group) {
 623                         radlog_request(L_ERR, 0, request,
 624                                        "Error creating Sql-Group attribute");
 625                         return -1;
 626                 }
 627                 pairadd(&request->packet->vps, sql_group);
 628                 if (!radius_xlat(querystr, sizeof(querystr), inst->config->authorize_group_check_query, request, sql_escape_func)) {
 629                         radlog_request(L_ERR, 0, request,
 630                                        "Error generating query; rejecting user");
 631                         /* Remove the grouup we added above */
 632                         pairdelete(&request->packet->vps, PW_SQL_GROUP);
 633                         return -1;
 634                 }
 635                 rows = sql_getvpdata(inst, sqlsocket, &check_tmp, querystr);
 636                 if (rows < 0) {
 637                         radlog_request(L_ERR, 0, request, "Error retrieving check pairs for group %s",
 638                                group_list_tmp->groupname);
 639                         /* Remove the grouup we added above */
 640                         pairdelete(&request->packet->vps, PW_SQL_GROUP);
 641                         pairfree(&check_tmp);
 642                         return -1;
 643                 } else if (rows > 0) {
 644                         /*
 645                          *      Only do this if *some* check pairs were returned
 646                          */
 647                         if (paircompare(request, request->packet->vps, check_tmp, &request->reply->vps) == 0) {
 648                                 found = 1;
 649                                 RDEBUG2("User found in group %s",
 650                                         group_list_tmp->groupname);
 651                                 /*
 652                                  *      Now get the reply pairs since the paircompare matched
 653                                  */
 654                                 if (!radius_xlat(querystr, sizeof(querystr), inst->config->authorize_group_reply_query, request, sql_escape_func)) {
 655                                         radlog_request(L_ERR, 0, request, "Error generating query; rejecting user");
 656                                         /* Remove the grouup we added above */
 657                                         pairdelete(&request->packet->vps, PW_SQL_GROUP);
 658                                         pairfree(&check_tmp);
 659                                         return -1;
 660                                 }
 661                                 if (sql_getvpdata(inst, sqlsocket, &reply_tmp, querystr) < 0) {
 662                                         radlog_request(L_ERR, 0, request, "Error retrieving reply pairs for group %s",
 663                                                group_list_tmp->groupname);
 664                                         /* Remove the grouup we added above */
 665                                         pairdelete(&request->packet->vps, PW_SQL_GROUP);
 666                                         pairfree(&check_tmp);
 667                                         pairfree(&reply_tmp);
 668                                         return -1;
 669                                 }
 670                                 *dofallthrough = fallthrough(reply_tmp);
 671                                 pairxlatmove(request, &request->reply->vps, &reply_tmp);
 672                                 pairxlatmove(request, &request->config_items, &check_tmp);
 673                         }
 674                 } else {
 675                         /*
 676                          *      rows == 0.  This is like having the username on a line
 677                          *      in the user's file with no check vp's.  As such, we treat
 678                          *      it as found and add the reply attributes, so that we
 679                          *      match expected behavior
 680                          */
 681                         found = 1;
 682                         RDEBUG2("User found in group %s",
 683                                 group_list_tmp->groupname);
 684                         /*
 685                          *      Now get the reply pairs since the paircompare matched
 686                          */
 687                         if (!radius_xlat(querystr, sizeof(querystr), inst->config->authorize_group_reply_query, request, sql_escape_func)) {
 688                                 radlog_request(L_ERR, 0, request, "Error generating query; rejecting user");
 689                                 /* Remove the grouup we added above */
 690                                 pairdelete(&request->packet->vps, PW_SQL_GROUP);
 691                                 pairfree(&check_tmp);
 692                                 return -1;
 693                         }
 694                         if (sql_getvpdata(inst, sqlsocket, &reply_tmp, querystr) < 0) {
 695                                 radlog_request(L_ERR, 0, request, "Error retrieving reply pairs for group %s",
 696                                        group_list_tmp->groupname);
 697                                 /* Remove the grouup we added above */
 698                                 pairdelete(&request->packet->vps, PW_SQL_GROUP);
 699                                 pairfree(&check_tmp);
 700                                 pairfree(&reply_tmp);
 701                                 return -1;
 702                         }
 703                         *dofallthrough = fallthrough(reply_tmp);
 704                         pairxlatmove(request, &request->reply->vps, &reply_tmp);
 705                         pairxlatmove(request, &request->config_items, &check_tmp);
 706                 }
 707
 708                 /*
 709                  * Delete the Sql-Group we added above
 710                  * And clear out the pairlists
 711                  */
 712                 pairdelete(&request->packet->vps, PW_SQL_GROUP);
 713                 pairfree(&check_tmp);
 714                 pairfree(&reply_tmp);
 715         }
 716
 717         sql_grouplist_free(&group_list);
 718         return found;
 719 }
 720
 721
 722 static int rlm_sql_detach(void *instance)
 723 {
 724         SQL_INST *inst = instance;
 725
 726         paircompare_unregister(PW_SQL_GROUP, sql_groupcmp);
 727
 728         if (inst->config) {
 729                 int i;
 730
 731                 if (inst->sqlpool) {
 732                         sql_poolfree(inst);
 733                 }
 734
 735                 if (inst->config->xlat_name) {
 736                         xlat_unregister(inst->config->xlat_name,(RAD_XLAT_FUNC)sql_xlat);
 737                         free(inst->config->xlat_name);
 738                 }
 739
 740                 /*
 741                  *      Free up dynamically allocated string pointers.
 742                  */
 743                 for (i = 0; module_config[i].name != NULL; i++) {
 744                         char **p;
 745                         if (module_config[i].type != PW_TYPE_STRING_PTR) {
 746                                 continue;
 747                         }
 748
 749                         /*
 750                          *      Treat 'config' as an opaque array of bytes,
 751                          *      and take the offset into it.  There's a
 752                          *      (char*) pointer at that offset, and we want
 753                          *      to point to it.
 754                          */
 755                         p = (char **) (((char *)inst->config) + module_config[i].offset);
 756                         if (!*p) { /* nothing allocated */
 757                                 continue;
 758                         }
 759                         free(*p);
 760                         *p = NULL;
 761                 }
 762                 allowed_chars = NULL;
 763                 free(inst->config);
 764                 inst->config = NULL;
 765         }
 766
 767         if (inst->handle) {
 768 #if 0
 769                 /*
 770                  *      FIXME: Call the modules 'destroy' function?
 771                  */
 772                 lt_dlclose(inst->handle);       /* ignore any errors */
 773 #endif
 774         }
 775         free(inst);
 776
 777         return 0;
 778 }
 779 static int rlm_sql_instantiate(CONF_SECTION * conf, void **instance)
 780 {
 781         SQL_INST *inst;
 782         const char *xlat_name;
 783
 784         inst = rad_malloc(sizeof(SQL_INST));
 785         memset(inst, 0, sizeof(SQL_INST));
 786
 787         inst->config = rad_malloc(sizeof(SQL_CONFIG));
 788         memset(inst->config, 0, sizeof(SQL_CONFIG));
 789
 790         /*
 791          *      Export these methods, too.  This avoids RTDL_GLOBAL.
 792          */
 793         inst->sql_set_user = sql_set_user;
 794         inst->sql_get_socket = sql_get_socket;
 795         inst->sql_release_socket = sql_release_socket;
 796         inst->sql_escape_func = sql_escape_func;
 797
 798         /*
 799          * If the configuration parameters can't be parsed, then
 800          * fail.
 801          */
 802         if (cf_section_parse(conf, inst->config, module_config) < 0) {
 803                 rlm_sql_detach(inst);
 804                 return -1;
 805         }
 806
 807         xlat_name = cf_section_name2(conf);
 808         if (xlat_name == NULL)
 809                 xlat_name = cf_section_name1(conf);
 810         if (xlat_name){
 811                 inst->config->xlat_name = strdup(xlat_name);
 812                 xlat_register(xlat_name, (RAD_XLAT_FUNC)sql_xlat, inst);
 813         }
 814
 815         if (inst->config->num_sql_socks > MAX_SQL_SOCKS) {
 816                 radlog(L_ERR, "rlm_sql (%s): sql_instantiate: number of sqlsockets cannot exceed MAX_SQL_SOCKS, %d",
 817                        inst->config->xlat_name, MAX_SQL_SOCKS);
 818                 rlm_sql_detach(inst);
 819                 return -1;
 820         }
 821
 822         /*
 823          *      Sanity check for crazy people.
 824          */
 825         if (strncmp(inst->config->sql_driver, "rlm_sql_", 8) != 0) {
 826                 radlog(L_ERR, "\"%s\" is NOT an SQL driver!",
 827                        inst->config->sql_driver);
 828                 rlm_sql_detach(inst);
 829                 return -1;
 830         }
 831
 832         inst->handle = lt_dlopenext(inst->config->sql_driver);
 833         if (inst->handle == NULL) {
 834                 radlog(L_ERR, "Could not link driver %s: %s",
 835                        inst->config->sql_driver,
 836                        lt_dlerror());
 837                 radlog(L_ERR, "Make sure it (and all its dependent libraries!) are in the search path of your system's ld.");
 838                 rlm_sql_detach(inst);
 839                 return -1;
 840         }
 841
 842         inst->module = (rlm_sql_module_t *) lt_dlsym(inst->handle, inst->config->sql_driver);
 843         if (!inst->module) {
 844                 radlog(L_ERR, "Could not link symbol %s: %s",
 845                        inst->config->sql_driver,
 846                        lt_dlerror());
 847                 rlm_sql_detach(inst);
 848                 return -1;
 849         }
 850
 851         radlog(L_INFO, "rlm_sql (%s): Driver %s (module %s) loaded and linked",
 852                inst->config->xlat_name, inst->config->sql_driver,
 853                inst->module->name);
 854         radlog(L_INFO, "rlm_sql (%s): Attempting to connect to %s@%s:%s/%s",
 855                inst->config->xlat_name, inst->config->sql_login,
 856                inst->config->sql_server, inst->config->sql_port,
 857                inst->config->sql_db);
 858
 859         if (sql_init_socketpool(inst) < 0) {
 860                 rlm_sql_detach(inst);
 861                 return -1;
 862         }
 863
 864         paircompare_register(PW_SQL_GROUP, PW_USER_NAME, sql_groupcmp, inst);
 865
 866         if (inst->config->do_clients){
 867                 if (generate_sql_clients(inst) == -1){
 868                         radlog(L_ERR, "Failed to load clients from SQL.");
 869                         rlm_sql_detach(inst);
 870                         return -1;
 871                 }
 872         }
 873         allowed_chars = inst->config->allowed_chars;
 874
 875         *instance = inst;
 876
 877         return RLM_MODULE_OK;
 878 }
 879
 880
 881 static int rlm_sql_authorize(void *instance, REQUEST * request)
 882 {
 883         VALUE_PAIR *check_tmp = NULL;
 884         VALUE_PAIR *reply_tmp = NULL;
 885         VALUE_PAIR *user_profile = NULL;
 886         int     found = 0;
 887         int     dofallthrough = 1;
 888         int     rows;
 889         SQLSOCK *sqlsocket;
 890         SQL_INST *inst = instance;
 891         char    querystr[MAX_QUERY_LEN];
 892         char    sqlusername[MAX_STRING_LEN];
 893         /*
 894          * the profile username is used as the sqlusername during
 895          * profile checking so that we don't overwrite the orignal
 896          * sqlusername string
 897          */
 898         char   profileusername[MAX_STRING_LEN];
 899
 900         /*
 901          * Set, escape, and check the user attr here
 902          */
 903         if (sql_set_user(inst, request, sqlusername, NULL) < 0)
 904                 return RLM_MODULE_FAIL;
 905
 906
 907         /*
 908          * reserve a socket
 909          */
 910         sqlsocket = sql_get_socket(inst);
 911         if (sqlsocket == NULL) {
 912                 /* Remove the username we (maybe) added above */
 913                 pairdelete(&request->packet->vps, PW_SQL_USER_NAME);
 914                 return RLM_MODULE_FAIL;
 915         }
 916
 917
 918         /*
 919          *  After this point, ALL 'return's MUST release the SQL socket!
 920          */
 921
 922         /*
 923          * Alright, start by getting the specific entry for the user
 924          */
 925         if (!radius_xlat(querystr, sizeof(querystr), inst->config->authorize_check_query, request, sql_escape_func)) {
 926                 radlog_request(L_ERR, 0, request, "Error generating query; rejecting user");
 927                 sql_release_socket(inst, sqlsocket);
 928                 /* Remove the username we (maybe) added above */
 929                 pairdelete(&request->packet->vps, PW_SQL_USER_NAME);
 930                 return RLM_MODULE_FAIL;
 931         }
 932         rows = sql_getvpdata(inst, sqlsocket, &check_tmp, querystr);
 933         if (rows < 0) {
 934                 radlog_request(L_ERR, 0, request, "SQL query error; rejecting user");
 935                 sql_release_socket(inst, sqlsocket);
 936                 /* Remove the username we (maybe) added above */
 937                 pairdelete(&request->packet->vps, PW_SQL_USER_NAME);
 938                 pairfree(&check_tmp);
 939                 return RLM_MODULE_FAIL;
 940         } else if (rows > 0) {
 941                 /*
 942                  *      Only do this if *some* check pairs were returned
 943                  */
 944                 if (paircompare(request, request->packet->vps, check_tmp, &request->reply->vps) == 0) {
 945                         found = 1;
 946                         RDEBUG2("User found in radcheck table");
 947
 948                         if (inst->config->authorize_reply_query &&
 949                             *inst->config->authorize_reply_query) {
 950
 951                         /*
 952                          *      Now get the reply pairs since the paircompare matched
 953                          */
 954                         if (!radius_xlat(querystr, sizeof(querystr), inst->config->authorize_reply_query, request, sql_escape_func)) {
 955                                 radlog_request(L_ERR, 0, request, "Error generating query; rejecting user");
 956                                 sql_release_socket(inst, sqlsocket);
 957                                 /* Remove the username we (maybe) added above */
 958                                 pairdelete(&request->packet->vps, PW_SQL_USER_NAME);
 959                                 pairfree(&check_tmp);
 960                                 return RLM_MODULE_FAIL;
 961                         }
 962                         if (sql_getvpdata(inst, sqlsocket, &reply_tmp, querystr) < 0) {
 963                                 radlog_request(L_ERR, 0, request, "SQL query error; rejecting user");
 964                                 sql_release_socket(inst, sqlsocket);
 965                                 /* Remove the username we (maybe) added above */
 966                                 pairdelete(&request->packet->vps, PW_SQL_USER_NAME);
 967                                 pairfree(&check_tmp);
 968                                 pairfree(&reply_tmp);
 969                                 return RLM_MODULE_FAIL;
 970                         }
 971
 972                         if (!inst->config->read_groups)
 973                                 dofallthrough = fallthrough(reply_tmp);
 974                         pairxlatmove(request, &request->reply->vps, &reply_tmp);
 975                         }
 976                         pairxlatmove(request, &request->config_items, &check_tmp);
 977                 }
 978         }
 979
 980         /*
 981          *      Clear out the pairlists
 982          */
 983         pairfree(&check_tmp);
 984         pairfree(&reply_tmp);
 985
 986         /*
 987          *      dofallthrough is set to 1 by default so that if the user information
 988          *      is not found, we will still process groups.  If the user information,
 989          *      however, *is* found, Fall-Through must be set in order to process
 990          *      the groups as well
 991          */
 992         if (dofallthrough) {
 993                 rows = rlm_sql_process_groups(inst, request, sqlsocket, &dofallthrough);
 994                 if (rows < 0) {
 995                         radlog_request(L_ERR, 0, request, "Error processing groups; rejecting user");
 996                         sql_release_socket(inst, sqlsocket);
 997                         /* Remove the username we (maybe) added above */
 998                         pairdelete(&request->packet->vps, PW_SQL_USER_NAME);
 999                         return RLM_MODULE_FAIL;
1000                 } else if (rows > 0) {
1001                         found = 1;
1002                 }
1003         }
1004
1005         /*
1006          *      repeat the above process with the default profile or User-Profile
1007          */
1008         if (dofallthrough) {
1009                 int profile_found = 0;
1010                 /*
1011                 * Check for a default_profile or for a User-Profile.
1012                 */
1013                 user_profile = pairfind(request->config_items, PW_USER_PROFILE);
1014                 if (inst->config->default_profile[0] != 0 || user_profile != NULL){
1015                         char *profile = inst->config->default_profile;
1016
1017                         if (user_profile != NULL)
1018                                 profile = user_profile->vp_strvalue;
1019                         if (profile && strlen(profile)){
1020                                 RDEBUG("Checking profile %s", profile);
1021                                 if (sql_set_user(inst, request, profileusername, profile) < 0) {
1022                                         radlog_request(L_ERR, 0, request, "Error setting profile; rejecting user");
1023                                         sql_release_socket(inst, sqlsocket);
1024                                         /* Remove the username we (maybe) added above */
1025                                         pairdelete(&request->packet->vps, PW_SQL_USER_NAME);
1026                                         return RLM_MODULE_FAIL;
1027                                 } else {
1028                                         profile_found = 1;
1029                                 }
1030                         }
1031                 }
1032
1033                 if (profile_found) {
1034                         rows = rlm_sql_process_groups(inst, request, sqlsocket, &dofallthrough);
1035                         if (rows < 0) {
1036                                 radlog_request(L_ERR, 0, request, "Error processing profile groups; rejecting user");
1037                                 sql_release_socket(inst, sqlsocket);
1038                                 /* Remove the username we (maybe) added above */
1039                                 pairdelete(&request->packet->vps, PW_SQL_USER_NAME);
1040                                 return RLM_MODULE_FAIL;
1041                         } else if (rows > 0) {
1042                                 found = 1;
1043                         }
1044                 }
1045         }
1046
1047         /* Remove the username we (maybe) added above */
1048         pairdelete(&request->packet->vps, PW_SQL_USER_NAME);
1049         sql_release_socket(inst, sqlsocket);
1050
1051         if (!found) {
1052                 RDEBUG("User %s not found", sqlusername);
1053                 return RLM_MODULE_NOTFOUND;
1054         } else {
1055                 return RLM_MODULE_OK;
1056         }
1057 }
1058
1059 /*
1060  *      Accounting: save the account data to our sql table
1061  */
1062 static int rlm_sql_accounting(void *instance, REQUEST * request) {
1063
1064         SQLSOCK *sqlsocket = NULL;
1065         VALUE_PAIR *pair;
1066         SQL_INST *inst = instance;
1067         int     ret = RLM_MODULE_OK;
1068         int     numaffected = 0;
1069         int     acctstatustype = 0;
1070         char    querystr[MAX_QUERY_LEN];
1071         char    logstr[MAX_QUERY_LEN];
1072         char    sqlusername[MAX_STRING_LEN];
1073
1074 #ifdef CISCO_ACCOUNTING_HACK
1075         int     acctsessiontime = 0;
1076 #endif
1077
1078         memset(querystr, 0, MAX_QUERY_LEN);
1079
1080         /*
1081          * Find the Acct Status Type
1082          */
1083         if ((pair = pairfind(request->packet->vps, PW_ACCT_STATUS_TYPE)) != NULL) {
1084                 acctstatustype = pair->vp_integer;
1085         } else {
1086                 radius_xlat(logstr, sizeof(logstr), "packet has no accounting status type. [user '%{User-Name}', nas '%{NAS-IP-Address}']", request, NULL);
1087                 radlog_request(L_ERR, 0, request, "%s", logstr);
1088                 return RLM_MODULE_INVALID;
1089         }
1090
1091         switch (acctstatustype) {
1092                         /*
1093                          * The Terminal server informed us that it was rebooted
1094                          * STOP all records from this NAS
1095                          */
1096                 case PW_STATUS_ACCOUNTING_ON:
1097                 case PW_STATUS_ACCOUNTING_OFF:
1098                         RDEBUG("Received Acct On/Off packet");
1099                         radius_xlat(querystr, sizeof(querystr), inst->config->accounting_onoff_query, request, sql_escape_func);
1100                         query_log(request, inst, querystr);
1101
1102                         sqlsocket = sql_get_socket(inst);
1103                         if (sqlsocket == NULL)
1104                                 return(RLM_MODULE_FAIL);
1105                         if (*querystr) { /* non-empty query */
1106                                 if (rlm_sql_query(sqlsocket, inst, querystr)) {
1107                                         radlog_request(L_ERR, 0, request, "Couldn't update SQL accounting for Acct On/Off packet - %s",
1108                                                (inst->module->sql_error)(sqlsocket, inst->config));
1109                                         ret = RLM_MODULE_FAIL;
1110                                 }
1111                                 (inst->module->sql_finish_query)(sqlsocket, inst->config);
1112                         }
1113
1114                         break;
1115
1116                         /*
1117                          * Got an update accounting packet
1118                          */
1119                 case PW_STATUS_ALIVE:
1120
1121                         /*
1122                          * Set, escape, and check the user attr here
1123                          */
1124                         sql_set_user(inst, request, sqlusername, NULL);
1125
1126                         radius_xlat(querystr, sizeof(querystr), inst->config->accounting_update_query, request, sql_escape_func);
1127                         query_log(request, inst, querystr);
1128
1129                         sqlsocket = sql_get_socket(inst);
1130                         if (sqlsocket == NULL)
1131                                 return(RLM_MODULE_FAIL);
1132                         if (*querystr) { /* non-empty query */
1133                                 if (rlm_sql_query(sqlsocket, inst, querystr)) {
1134                                         radlog_request(L_ERR, 0, request, "Couldn't update SQL accounting ALIVE record - %s",
1135                                                (inst->module->sql_error)(sqlsocket, inst->config));
1136                                         ret = RLM_MODULE_FAIL;
1137                                 }
1138                                 else {
1139                                         numaffected = (inst->module->sql_affected_rows)(sqlsocket, inst->config);
1140                                         if (numaffected < 1) {
1141
1142                                                 /*
1143                                                  * If our update above didn't match anything
1144                                                  * we assume it's because we haven't seen a
1145                                                  * matching Start record.  So we have to
1146                                                  * insert this update rather than do an update
1147                                                  */
1148                                                 radius_xlat(querystr, sizeof(querystr), inst->config->accounting_update_query_alt, request, sql_escape_func);
1149                                                 query_log(request, inst, querystr);
1150                                                 if (*querystr) { /* non-empty query */
1151                                                         if (rlm_sql_query(sqlsocket, inst, querystr)) {
1152                                                                 radlog_request(L_ERR, 0, request, "Couldn't insert SQL accounting ALIVE record - %s",
1153                                                                        (inst->module->sql_error)(sqlsocket, inst->config));
1154                                                                 ret = RLM_MODULE_FAIL;
1155                                                         }
1156                                                         (inst->module->sql_finish_query)(sqlsocket, inst->config);
1157                                                 }
1158                                         }
1159                                 }
1160                                 (inst->module->sql_finish_query)(sqlsocket, inst->config);
1161                         }
1162                         break;
1163
1164                         /*
1165                          * Got accounting start packet
1166                          */
1167                 case PW_STATUS_START:
1168
1169                         /*
1170                          * Set, escape, and check the user attr here
1171                          */
1172                         sql_set_user(inst, request, sqlusername, NULL);
1173
1174                         radius_xlat(querystr, sizeof(querystr), inst->config->accounting_start_query, request, sql_escape_func);
1175                         query_log(request, inst, querystr);
1176
1177                         sqlsocket = sql_get_socket(inst);
1178                         if (sqlsocket == NULL)
1179                                 return(RLM_MODULE_FAIL);
1180                         if (*querystr) { /* non-empty query */
1181                                 if (rlm_sql_query(sqlsocket, inst, querystr)) {
1182                                         radlog_request(L_ERR, 0, request, "Couldn't insert SQL accounting START record - %s",
1183                                                (inst->module->sql_error)(sqlsocket, inst->config));
1184
1185                                         /*
1186                                          * We failed the insert above.  It's probably because
1187                                          * the stop record came before the start.  We try
1188                                          * our alternate query now (typically an UPDATE)
1189                                          */
1190                                         radius_xlat(querystr, sizeof(querystr), inst->config->accounting_start_query_alt, request, sql_escape_func);
1191                                         query_log(request, inst, querystr);
1192
1193                                         if (*querystr) { /* non-empty query */
1194                                                 if (rlm_sql_query(sqlsocket, inst, querystr)) {
1195                                                         radlog_request(L_ERR, 0, request, "Couldn't update SQL accounting START record - %s",
1196                                                                (inst->module->sql_error)(sqlsocket, inst->config));
1197                                                         ret = RLM_MODULE_FAIL;
1198                                                 }
1199                                                 (inst->module->sql_finish_query)(sqlsocket, inst->config);
1200                                         }
1201                                 }
1202                                 (inst->module->sql_finish_query)(sqlsocket, inst->config);
1203                         }
1204                         break;
1205
1206                         /*
1207                          * Got accounting stop packet
1208                          */
1209                 case PW_STATUS_STOP:
1210
1211                         /*
1212                          * Set, escape, and check the user attr here
1213                          */
1214                         sql_set_user(inst, request, sqlusername, NULL);
1215
1216                         radius_xlat(querystr, sizeof(querystr), inst->config->accounting_stop_query, request, sql_escape_func);
1217                         query_log(request, inst, querystr);
1218
1219                         sqlsocket = sql_get_socket(inst);
1220                         if (sqlsocket == NULL)
1221                                 return(RLM_MODULE_FAIL);
1222                         if (*querystr) { /* non-empty query */
1223                                 if (rlm_sql_query(sqlsocket, inst, querystr)) {
1224                                         radlog_request(L_ERR, 0, request, "Couldn't update SQL accounting STOP record - %s",
1225                                                (inst->module->sql_error)(sqlsocket, inst->config));
1226                                         ret = RLM_MODULE_FAIL;
1227                                 }
1228                                 else {
1229                                         numaffected = (inst->module->sql_affected_rows)(sqlsocket, inst->config);
1230                                         if (numaffected < 1) {
1231                                                 /*
1232                                                  * If our update above didn't match anything
1233                                                  * we assume it's because we haven't seen a
1234                                                  * matching Start record.  So we have to
1235                                                  * insert this stop rather than do an update
1236                                                  */
1237 #ifdef CISCO_ACCOUNTING_HACK
1238                                                 /*
1239                                                  * If stop but zero session length AND no previous
1240                                                  * session found, drop it as in invalid packet
1241                                                  * This is to fix CISCO's aaa from filling our
1242                                                  * table with bogus crap
1243                                                  */
1244                                                 if ((pair = pairfind(request->packet->vps, PW_ACCT_SESSION_TIME)) != NULL)
1245                                                         acctsessiontime = pair->vp_integer;
1246
1247                                                 if (acctsessiontime <= 0) {
1248                                                         radius_xlat(logstr, sizeof(logstr), "stop packet with zero session length. [user '%{User-Name}', nas '%{NAS-IP-Address}']", request, NULL);
1249                                                         radlog_request(L_ERR, 0, request, "%s", logstr);
1250                                                         sql_release_socket(inst, sqlsocket);
1251                                                         ret = RLM_MODULE_NOOP;
1252                                                 }
1253 #endif
1254
1255                                                 radius_xlat(querystr, sizeof(querystr), inst->config->accounting_stop_query_alt, request, sql_escape_func);
1256                                                 query_log(request, inst, querystr);
1257
1258                                                 if (*querystr) { /* non-empty query */
1259                                                         if (rlm_sql_query(sqlsocket, inst, querystr)) {
1260                                                                 radlog_request(L_ERR, 0, request, "Couldn't insert SQL accounting STOP record - %s",
1261
1262                                                                        (inst->module->sql_error)(sqlsocket, inst->config));
1263                                                                 ret = RLM_MODULE_FAIL;
1264                                                         }
1265                                                         (inst->module->sql_finish_query)(sqlsocket, inst->config);
1266                                                 }
1267                                         }
1268                                 }
1269                                 (inst->module->sql_finish_query)(sqlsocket, inst->config);
1270                         }
1271                         break;
1272
1273                         /*
1274                          *      Anything else is ignored.
1275                          */
1276                 default:
1277                         RDEBUG("Unsupported Acct-Status-Type = %d",
1278                        acctstatustype);
1279                         return RLM_MODULE_NOOP;
1280                         break;
1281
1282         }
1283
1284         sql_release_socket(inst, sqlsocket);
1285
1286         return ret;
1287 }
1288
1289
1290 /*
1291  *        See if a user is already logged in. Sets request->simul_count to the
1292  *        current session count for this user.
1293  *
1294  *        Check twice. If on the first pass the user exceeds his
1295  *        max. number of logins, do a second pass and validate all
1296  *        logins by querying the terminal server (using eg. SNMP).
1297  */
1298
1299 static int rlm_sql_checksimul(void *instance, REQUEST * request) {
1300         SQLSOCK         *sqlsocket;
1301         SQL_INST        *inst = instance;
1302         SQL_ROW         row;
1303         char            querystr[MAX_QUERY_LEN];
1304         char            sqlusername[MAX_STRING_LEN];
1305         int             check = 0;
1306         uint32_t        ipno = 0;
1307         char            *call_num = NULL;
1308         VALUE_PAIR      *vp;
1309         int             ret;
1310         uint32_t        nas_addr = 0;
1311         int             nas_port = 0;
1312
1313         /* If simul_count_query is not defined, we don't do any checking */
1314         if (!inst->config->simul_count_query ||
1315             (inst->config->simul_count_query[0] == 0)) {
1316                 return RLM_MODULE_NOOP;
1317         }
1318
1319         if((request->username == NULL) || (request->username->length == 0)) {
1320                 radlog_request(L_ERR, 0, request, "Zero Length username not permitted\n");
1321                 return RLM_MODULE_INVALID;
1322         }
1323
1324
1325         if(sql_set_user(inst, request, sqlusername, NULL) < 0)
1326                 return RLM_MODULE_FAIL;
1327
1328         radius_xlat(querystr, sizeof(querystr), inst->config->simul_count_query, request, sql_escape_func);
1329
1330         /* initialize the sql socket */
1331         sqlsocket = sql_get_socket(inst);
1332         if(sqlsocket == NULL)
1333                 return RLM_MODULE_FAIL;
1334
1335         if(rlm_sql_select_query(sqlsocket, inst, querystr)) {
1336                 radlog(L_ERR, "rlm_sql (%s) sql_checksimul: Database query failed", inst->config->xlat_name);
1337                 sql_release_socket(inst, sqlsocket);
1338                 return RLM_MODULE_FAIL;
1339         }
1340
1341         ret = rlm_sql_fetch_row(sqlsocket, inst);
1342
1343         if (ret != 0) {
1344                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1345                 sql_release_socket(inst, sqlsocket);
1346                 return RLM_MODULE_FAIL;
1347         }
1348
1349         row = sqlsocket->row;
1350         if (row == NULL) {
1351                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1352                 sql_release_socket(inst, sqlsocket);
1353                 return RLM_MODULE_FAIL;
1354         }
1355
1356         request->simul_count = atoi(row[0]);
1357         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1358
1359         if(request->simul_count < request->simul_max) {
1360                 sql_release_socket(inst, sqlsocket);
1361                 return RLM_MODULE_OK;
1362         }
1363
1364         /*
1365          *      Looks like too many sessions, so let's start verifying
1366          *      them, unless told to rely on count query only.
1367          */
1368         if (!inst->config->simul_verify_query ||
1369             (inst->config->simul_verify_query[0] == '\0')) {
1370                 sql_release_socket(inst, sqlsocket);
1371                 return RLM_MODULE_OK;
1372         }
1373
1374         radius_xlat(querystr, sizeof(querystr), inst->config->simul_verify_query, request, sql_escape_func);
1375         if(rlm_sql_select_query(sqlsocket, inst, querystr)) {
1376                 radlog_request(L_ERR, 0, request, "Database query error");
1377                 sql_release_socket(inst, sqlsocket);
1378                 return RLM_MODULE_FAIL;
1379         }
1380
1381         /*
1382          *      Setup some stuff, like for MPP detection.
1383          */
1384         request->simul_count = 0;
1385
1386         if ((vp = pairfind(request->packet->vps, PW_FRAMED_IP_ADDRESS)) != NULL)
1387                 ipno = vp->vp_ipaddr;
1388         if ((vp = pairfind(request->packet->vps, PW_CALLING_STATION_ID)) != NULL)
1389                 call_num = vp->vp_strvalue;
1390
1391
1392         while (rlm_sql_fetch_row(sqlsocket, inst) == 0) {
1393                 row = sqlsocket->row;
1394                 if (row == NULL)
1395                         break;
1396                 if (!row[2]){
1397                         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1398                         sql_release_socket(inst, sqlsocket);
1399                         RDEBUG("Cannot zap stale entry. No username present in entry.", inst->config->xlat_name);
1400                         return RLM_MODULE_FAIL;
1401                 }
1402                 if (!row[1]){
1403                         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1404                         sql_release_socket(inst, sqlsocket);
1405                         RDEBUG("Cannot zap stale entry. No session id in entry.", inst->config->xlat_name);
1406                         return RLM_MODULE_FAIL;
1407                 }
1408                 if (row[3])
1409                         nas_addr = inet_addr(row[3]);
1410                 if (row[4])
1411                         nas_port = atoi(row[4]);
1412
1413                 check = rad_check_ts(nas_addr, nas_port, row[2], row[1]);
1414
1415                 if (check == 0) {
1416                         /*
1417                          *      Stale record - zap it.
1418                          */
1419                         if (inst->config->deletestalesessions == TRUE) {
1420                                 uint32_t framed_addr = 0;
1421                                 char proto = 0;
1422                                 int sess_time = 0;
1423
1424                                 if (row[5])
1425                                         framed_addr = inet_addr(row[5]);
1426                                 if (row[7]){
1427                                         if (strcmp(row[7], "PPP") == 0)
1428                                                 proto = 'P';
1429                                         else if (strcmp(row[7], "SLIP") == 0)
1430                                                 proto = 'S';
1431                                 }
1432                                 if (row[8])
1433                                         sess_time = atoi(row[8]);
1434                                 session_zap(request, nas_addr, nas_port,
1435                                             row[2], row[1], framed_addr,
1436                                             proto, sess_time);
1437                         }
1438                 }
1439                 else if (check == 1) {
1440                         /*
1441                          *      User is still logged in.
1442                          */
1443                         ++request->simul_count;
1444
1445                         /*
1446                          *      Does it look like a MPP attempt?
1447                          */
1448                         if (row[5] && ipno && inet_addr(row[5]) == ipno)
1449                                 request->simul_mpp = 2;
1450                         else if (row[6] && call_num &&
1451                                 !strncmp(row[6],call_num,16))
1452                                 request->simul_mpp = 2;
1453                 }
1454                 else {
1455                         /*
1456                          *      Failed to check the terminal server for
1457                          *      duplicate logins: return an error.
1458                          */
1459                         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1460                         sql_release_socket(inst, sqlsocket);
1461                         radlog_request(L_ERR, 0, request, "Failed to check the terminal server for user '%s'.", row[2]);
1462                         return RLM_MODULE_FAIL;
1463                 }
1464         }
1465
1466         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1467         sql_release_socket(inst, sqlsocket);
1468
1469         /*
1470          *      The Auth module apparently looks at request->simul_count,
1471          *      not the return value of this module when deciding to deny
1472          *      a call for too many sessions.
1473          */
1474         return RLM_MODULE_OK;
1475 }
1476
1477 /*
1478  *      Execute postauth_query after authentication
1479  */
1480 static int rlm_sql_postauth(void *instance, REQUEST *request) {
1481         SQLSOCK         *sqlsocket = NULL;
1482         SQL_INST        *inst = instance;
1483         char            querystr[MAX_QUERY_LEN];
1484         char            sqlusername[MAX_STRING_LEN];
1485
1486         if(sql_set_user(inst, request, sqlusername, NULL) < 0)
1487                 return RLM_MODULE_FAIL;
1488
1489         /* If postauth_query is not defined, we stop here */
1490         if (!inst->config->postauth_query ||
1491             (inst->config->postauth_query[0] == '\0'))
1492                 return RLM_MODULE_NOOP;
1493
1494         /* Expand variables in the query */
1495         memset(querystr, 0, MAX_QUERY_LEN);
1496         radius_xlat(querystr, sizeof(querystr), inst->config->postauth_query,
1497                     request, sql_escape_func);
1498         query_log(request, inst, querystr);
1499         DEBUG2("rlm_sql (%s) in sql_postauth: query is %s",
1500                inst->config->xlat_name, querystr);
1501
1502         /* Initialize the sql socket */
1503         sqlsocket = sql_get_socket(inst);
1504         if (sqlsocket == NULL)
1505                 return RLM_MODULE_FAIL;
1506
1507         /* Process the query */
1508         if (rlm_sql_query(sqlsocket, inst, querystr)) {
1509                 radlog(L_ERR, "rlm_sql (%s) in sql_postauth: Database query error - %s",
1510                        inst->config->xlat_name,
1511                        (inst->module->sql_error)(sqlsocket, inst->config));
1512                 sql_release_socket(inst, sqlsocket);
1513                 return RLM_MODULE_FAIL;
1514         }
1515         (inst->module->sql_finish_query)(sqlsocket, inst->config);
1516
1517         sql_release_socket(inst, sqlsocket);
1518         return RLM_MODULE_OK;
1519 }
1520
1521 /* globally exported name */
1522 module_t rlm_sql = {
1523         RLM_MODULE_INIT,
1524         "SQL",
1525         RLM_TYPE_THREAD_SAFE,   /* type: reserved */
1526         rlm_sql_instantiate,    /* instantiation */
1527         rlm_sql_detach,         /* detach */
1528         {
1529                 NULL,                   /* authentication */
1530                 rlm_sql_authorize,      /* authorization */
1531                 NULL,                   /* preaccounting */
1532                 rlm_sql_accounting,     /* accounting */
1533                 rlm_sql_checksimul,     /* checksimul */
1534                 NULL,                   /* pre-proxy */
1535                 NULL,                   /* post-proxy */
1536                 rlm_sql_postauth        /* post-auth */
1537         },
1538 };