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/autoconf.h>
  30
  31 #include <stdio.h>
  32 #include <sys/stat.h>
  33 #include <stdlib.h>
  34
  35 #include <time.h>
  36 #include <unistd.h>
  37 #include <sys/types.h>
  38 #include <sys/wait.h>
  39 #include <string.h>
  40
  41 #include <sys/socket.h>
  42 #include <netinet/in.h>
  43 #include <arpa/inet.h>
  44
  45 #include <freeradius-devel/radiusd.h>
  46 #include <freeradius-devel/modules.h>
  47 #include "rlm_sql.h"
  48 #include <freeradius-devel/rad_assert.h>
  49
  50 static char *allowed_chars = NULL;
  51
  52 static const CONF_PARSER module_config[] = {
  53         {"driver",PW_TYPE_STRING_PTR,
  54          offsetof(SQL_CONFIG,sql_driver), NULL, "mysql"},
  55         {"server",PW_TYPE_STRING_PTR,
  56          offsetof(SQL_CONFIG,sql_server), NULL, "localhost"},
  57         {"port",PW_TYPE_STRING_PTR,
  58          offsetof(SQL_CONFIG,sql_port), NULL, ""},
  59         {"login", PW_TYPE_STRING_PTR,
  60          offsetof(SQL_CONFIG,sql_login), NULL, ""},
  61         {"password", PW_TYPE_STRING_PTR,
  62          offsetof(SQL_CONFIG,sql_password), NULL, ""},
  63         {"radius_db", PW_TYPE_STRING_PTR,
  64          offsetof(SQL_CONFIG,sql_db), NULL, "radius"},
  65         {"sqltrace", PW_TYPE_BOOLEAN,
  66          offsetof(SQL_CONFIG,sqltrace), NULL, "no"},
  67         {"sqltracefile", PW_TYPE_STRING_PTR,
  68          offsetof(SQL_CONFIG,tracefile), NULL, SQLTRACEFILE},
  69         {"readclients", PW_TYPE_BOOLEAN,
  70          offsetof(SQL_CONFIG,do_clients), NULL, "no"},
  71         {"deletestalesessions", PW_TYPE_BOOLEAN,
  72          offsetof(SQL_CONFIG,deletestalesessions), NULL, "yes"},
  73         {"num_sql_socks", PW_TYPE_INTEGER,
  74          offsetof(SQL_CONFIG,num_sql_socks), NULL, "5"},
  75         {"sql_user_name", PW_TYPE_STRING_PTR,
  76          offsetof(SQL_CONFIG,query_user), NULL, ""},
  77         {"default_user_profile", PW_TYPE_STRING_PTR,
  78          offsetof(SQL_CONFIG,default_profile), NULL, ""},
  79         {"nas_query", PW_TYPE_STRING_PTR,
  80          offsetof(SQL_CONFIG,nas_query), NULL, "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, ""},
  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         {"accounting_onoff_query", PW_TYPE_STRING_PTR,
  90          offsetof(SQL_CONFIG,accounting_onoff_query), NULL, ""},
  91         {"accounting_update_query", PW_TYPE_STRING_PTR,
  92          offsetof(SQL_CONFIG,accounting_update_query), NULL, ""},
  93         {"accounting_update_query_alt", PW_TYPE_STRING_PTR,
  94          offsetof(SQL_CONFIG,accounting_update_query_alt), NULL, ""},
  95         {"accounting_start_query", PW_TYPE_STRING_PTR,
  96          offsetof(SQL_CONFIG,accounting_start_query), NULL, ""},
  97         {"accounting_start_query_alt", PW_TYPE_STRING_PTR,
  98          offsetof(SQL_CONFIG,accounting_start_query_alt), NULL, ""},
  99         {"accounting_stop_query", PW_TYPE_STRING_PTR,
 100          offsetof(SQL_CONFIG,accounting_stop_query), NULL, ""},
 101         {"accounting_stop_query_alt", PW_TYPE_STRING_PTR,
 102          offsetof(SQL_CONFIG,accounting_stop_query_alt), NULL, ""},
 103         {"group_membership_query", PW_TYPE_STRING_PTR,
 104          offsetof(SQL_CONFIG,groupmemb_query), NULL, ""},
 105         {"connect_failure_retry_delay", PW_TYPE_INTEGER,
 106          offsetof(SQL_CONFIG,connect_failure_retry_delay), NULL, "60"},
 107         {"simul_count_query", PW_TYPE_STRING_PTR,
 108          offsetof(SQL_CONFIG,simul_count_query), NULL, ""},
 109         {"simul_verify_query", PW_TYPE_STRING_PTR,
 110          offsetof(SQL_CONFIG,simul_verify_query), NULL, ""},
 111         {"postauth_query", PW_TYPE_STRING_PTR,
 112          offsetof(SQL_CONFIG,postauth_query), NULL, ""},
 113         {"safe-characters", PW_TYPE_STRING_PTR,
 114          offsetof(SQL_CONFIG,allowed_chars), NULL,
 115         "@abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.-_: /"},
 116
 117         {NULL, -1, 0, NULL, NULL}
 118 };
 119
 120 /*
 121  *      Fall-Through checking function from rlm_files.c
 122  */
 123 static int fallthrough(VALUE_PAIR *vp)
 124 {
 125         VALUE_PAIR *tmp;
 126         tmp = pairfind(vp, PW_FALL_THROUGH);
 127
 128         return tmp ? tmp->lvalue : 0;
 129 }
 130
 131
 132
 133 /*
 134  *      Yucky prototype.
 135  */
 136 static int sql_set_user(SQL_INST *inst, REQUEST *request, char *sqlusername, const char *username);
 137 static int generate_sql_clients(SQL_INST *inst);
 138 static int sql_escape_func(char *out, int outlen, const char *in);
 139
 140 /*
 141  *      sql xlat function. Right now only SELECTs are supported. Only
 142  *      the first element of the SELECT result will be used.
 143  */
 144 static int sql_xlat(void *instance, REQUEST *request,
 145                     char *fmt, char *out, size_t freespace,
 146                     UNUSED RADIUS_ESCAPE_STRING func)
 147 {
 148         SQLSOCK *sqlsocket;
 149         SQL_ROW row;
 150         SQL_INST *inst = instance;
 151         char querystr[MAX_QUERY_LEN];
 152         char sqlusername[MAX_STRING_LEN];
 153         int ret = 0;
 154
 155         DEBUG("rlm_sql (%s): - sql_xlat", inst->config->xlat_name);
 156         /*
 157          * Add SQL-User-Name attribute just in case it is needed
 158          *  We could search the string fmt for SQL-User-Name to see if this is
 159          *  needed or not
 160          */
 161         sql_set_user(inst, request, sqlusername, NULL);
 162         /*
 163          * Do an xlat on the provided string (nice recursive operation).
 164          */
 165         if (!radius_xlat(querystr, sizeof(querystr), fmt, request, sql_escape_func)) {
 166                 radlog(L_ERR, "rlm_sql (%s): xlat failed.",
 167                        inst->config->xlat_name);
 168                 return 0;
 169         }
 170
 171         query_log(request, inst,querystr);
 172         sqlsocket = sql_get_socket(inst);
 173         if (sqlsocket == NULL)
 174                 return 0;
 175         if (rlm_sql_select_query(sqlsocket,inst,querystr)){
 176                 radlog(L_ERR, "rlm_sql (%s): database query error, %s: %s",
 177                        inst->config->xlat_name,querystr,
 178                        (char *)(inst->module->sql_error)(sqlsocket, inst->config));
 179                 sql_release_socket(inst,sqlsocket);
 180                 return 0;
 181         }
 182
 183         ret = rlm_sql_fetch_row(sqlsocket, inst);
 184
 185         if (ret) {
 186                 DEBUG("rlm_sql (%s): SQL query did not succeed",
 187                       inst->config->xlat_name);
 188                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 189                 sql_release_socket(inst,sqlsocket);
 190                 return 0;
 191         }
 192
 193         row = sqlsocket->row;
 194         if (row == NULL) {
 195                 DEBUG("rlm_sql (%s): SQL query did not return any results",
 196                       inst->config->xlat_name);
 197                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 198                 sql_release_socket(inst,sqlsocket);
 199                 return 0;
 200         }
 201
 202         if (row[0] == NULL){
 203                 DEBUG("rlm_sql (%s): row[0] returned NULL",
 204                       inst->config->xlat_name);
 205                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 206                 sql_release_socket(inst,sqlsocket);
 207                 return 0;
 208         }
 209         ret = strlen(row[0]);
 210         if (ret > freespace){
 211                 DEBUG("rlm_sql (%s): sql_xlat:: Insufficient string space",
 212                       inst->config->xlat_name);
 213                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 214                 sql_release_socket(inst,sqlsocket);
 215                 return 0;
 216         }
 217
 218         strlcpy(out,row[0],ret);
 219
 220         DEBUG("rlm_sql (%s): - sql_xlat finished",
 221               inst->config->xlat_name);
 222
 223         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 224         sql_release_socket(inst,sqlsocket);
 225         return ret;
 226 }
 227
 228 static int generate_sql_clients(SQL_INST *inst)
 229 {
 230         SQLSOCK *sqlsocket;
 231         SQL_ROW row;
 232         char querystr[MAX_QUERY_LEN];
 233         RADCLIENT *c;
 234         char *prefix_ptr = NULL;
 235         unsigned int i = 0;
 236
 237         DEBUG("rlm_sql (%s): Processing generate_sql_clients",
 238               inst->config->xlat_name);
 239
 240         /* NAS query isn't xlat'ed */
 241         strlcpy(querystr, inst->config->nas_query, sizeof(querystr));
 242         DEBUG("rlm_sql (%s) in generate_sql_clients: query is %s",
 243               inst->config->xlat_name, querystr);
 244
 245         sqlsocket = sql_get_socket(inst);
 246         if (sqlsocket == NULL)
 247                 return -1;
 248         if (rlm_sql_select_query(sqlsocket,inst,querystr)){
 249                 radlog(L_ERR, "rlm_sql (%s): database query error, %s: %s",
 250                         inst->config->xlat_name,querystr,
 251                         (char *)(inst->module->sql_error)(sqlsocket, inst->config));
 252                 sql_release_socket(inst,sqlsocket);
 253                 return -1;
 254         }
 255
 256         while(rlm_sql_fetch_row(sqlsocket, inst) == 0) {
 257                 i++;
 258                 row = sqlsocket->row;
 259                 if (row == NULL)
 260                         break;
 261         /*
 262          *  The return data for each row MUST be in the following order:
 263          *
 264          *  0. Row ID (currently unused)
 265          *  1. Name (or IP address)
 266          *  2. Shortname
 267          *  3. Type
 268          *  4. Secret
 269          */
 270                 if (!row[0]){
 271                         radlog(L_ERR, "rlm_sql (%s): No row id found on pass %d",inst->config->xlat_name,i);
 272                         continue;
 273                 }
 274                 if (!row[1]){
 275                         radlog(L_ERR, "rlm_sql (%s): No nasname found for row %s",inst->config->xlat_name,row[0]);
 276                         continue;
 277                 }
 278                 if (!row[2]){
 279                         radlog(L_ERR, "rlm_sql (%s): No short name found for row %s",inst->config->xlat_name,row[0]);
 280                         continue;
 281                 }
 282                 if (!row[4]){
 283                         radlog(L_ERR, "rlm_sql (%s): No secret found for row %s",inst->config->xlat_name,row[0]);
 284                         continue;
 285                 }
 286
 287                 DEBUG("rlm_sql (%s): Read entry nasname=%s,shortname=%s,secret=%s",inst->config->xlat_name,
 288                         row[1],row[2],row[4]);
 289
 290                 c = rad_malloc(sizeof(RADCLIENT));
 291                 memset(c, 0, sizeof(RADCLIENT));
 292
 293                 /*
 294                  *      Look for prefixes
 295                  */
 296                 c->prefix = -1;
 297                 prefix_ptr = strchr(row[1], '/');
 298                 if (prefix_ptr) {
 299                         c->prefix = atoi(prefix_ptr + 1);
 300                         if ((c->prefix < 0) || (c->prefix > 128)) {
 301                                 radlog(L_ERR, "rlm_sql (%s): Invalid Prefix value '%s' for IP.",
 302                                        inst->config->xlat_name, prefix_ptr + 1);
 303                                 free(c);
 304                                 continue;
 305                         }
 306                         /* Replace '/' with '\0' */
 307                         *prefix_ptr = '\0';
 308                 }
 309
 310                 /*
 311                  *      Always get the numeric representation of IP
 312                  */
 313                 if (ip_hton(row[1], AF_UNSPEC, &c->ipaddr) < 0) {
 314                         radlog(L_CONS|L_ERR, "rlm_sql (%s): Failed to look up hostname %s: %s",
 315                                inst->config->xlat_name,
 316                                row[1], librad_errstr);
 317                         free(c);
 318                         continue;
 319                 } else {
 320                         char buffer[256];
 321                         ip_ntoh(&c->ipaddr, buffer, sizeof(buffer));
 322                         c->longname = strdup(buffer);
 323                 }
 324
 325                 if (c->prefix < 0) switch (c->ipaddr.af) {
 326                 case AF_INET:
 327                         c->prefix = 32;
 328                         break;
 329                 case AF_INET6:
 330                         c->prefix = 128;
 331                         break;
 332                 default:
 333                         break;
 334                 }
 335
 336                 /*
 337                  *      Other values (secret, shortname, nastype)
 338                  */
 339                 c->secret = (u_char *)strdup(row[4]);
 340                 c->shortname = strdup(row[2]);
 341                 if(row[3] != NULL)
 342                         c->nastype = strdup(row[3]);
 343
 344                 DEBUG("rlm_sql (%s): Adding client %s (%s) to clients list",
 345                       inst->config->xlat_name,
 346                       c->longname,c->shortname);
 347                 if (!client_add(mainconfig.clients, c)) {
 348                         client_free(c);
 349                         return -1;
 350                 }
 351         }
 352         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 353         sql_release_socket(inst, sqlsocket);
 354
 355         return 0;
 356 }
 357
 358
 359 /*
 360  *      Translate the SQL queries.
 361  */
 362 static int sql_escape_func(char *out, int outlen, const char *in)
 363 {
 364         int len = 0;
 365
 366         while (in[0]) {
 367                 /*
 368                  *      Non-printable characters get replaced with their
 369                  *      mime-encoded equivalents.
 370                  */
 371                 if ((in[0] < 32) ||
 372                     strchr(allowed_chars, *in) == NULL) {
 373                         /*
 374                          *      Only 3 or less bytes available.
 375                          */
 376                         if (outlen <= 3) {
 377                                 break;
 378                         }
 379
 380                         snprintf(out, outlen, "=%02X", (unsigned char) in[0]);
 381                         in++;
 382                         out += 3;
 383                         outlen -= 3;
 384                         len += 3;
 385                         continue;
 386                 }
 387
 388                 /*
 389                  *      Only one byte left.
 390                  */
 391                 if (outlen <= 1) {
 392                         break;
 393                 }
 394
 395                 /*
 396                  *      Allowed character.
 397                  */
 398                 *out = *in;
 399                 out++;
 400                 in++;
 401                 outlen--;
 402                 len++;
 403         }
 404         *out = '\0';
 405         return len;
 406 }
 407
 408 /*
 409  *      Set the SQL user name.
 410  *
 411  *      We don't call the escape function here. The resulting string
 412  *      will be escaped later in the queries xlat so we don't need to
 413  *      escape it twice. (it will make things wrong if we have an
 414  *      escape candidate character in the username)
 415  */
 416 static int sql_set_user(SQL_INST *inst, REQUEST *request, char *sqlusername, const char *username)
 417 {
 418         VALUE_PAIR *vp=NULL;
 419         char tmpuser[MAX_STRING_LEN];
 420
 421         tmpuser[0] = '\0';
 422         sqlusername[0]= '\0';
 423
 424         /* Remove any user attr we added previously */
 425         pairdelete(&request->packet->vps, PW_SQL_USER_NAME);
 426
 427         if (username != NULL) {
 428                 strlcpy(tmpuser, username, MAX_STRING_LEN);
 429         } else if (strlen(inst->config->query_user)) {
 430                 radius_xlat(tmpuser, sizeof(tmpuser), inst->config->query_user, request, NULL);
 431         } else {
 432                 return 0;
 433         }
 434
 435         strlcpy(sqlusername, tmpuser, MAX_STRING_LEN);
 436         DEBUG2("rlm_sql (%s): sql_set_user escaped user --> '%s'",
 437                        inst->config->xlat_name, sqlusername);
 438         vp = pairmake("SQL-User-Name", sqlusername, 0);
 439         if (vp == NULL) {
 440                 radlog(L_ERR, "%s", librad_errstr);
 441                 return -1;
 442         }
 443
 444         pairadd(&request->packet->vps, vp);
 445         return 0;
 446
 447 }
 448
 449
 450 static void sql_grouplist_free (SQL_GROUPLIST **group_list)
 451 {
 452         SQL_GROUPLIST *last;
 453
 454         while(*group_list) {
 455                 last = *group_list;
 456                 *group_list = (*group_list)->next;
 457                 free(last);
 458         }
 459 }
 460
 461
 462 static int sql_get_grouplist (SQL_INST *inst, SQLSOCK *sqlsocket, REQUEST *request, SQL_GROUPLIST **group_list)
 463 {
 464         char    querystr[MAX_QUERY_LEN];
 465         int     num_groups = 0;
 466         SQL_ROW row;
 467         SQL_GROUPLIST   *group_list_tmp;
 468
 469         /* NOTE: sql_set_user should have been run before calling this function */
 470
 471         group_list_tmp = *group_list = NULL;
 472
 473         if (inst->config->groupmemb_query[0] == 0)
 474                 return 1;
 475
 476         if (!radius_xlat(querystr, sizeof(querystr), inst->config->groupmemb_query, request, sql_escape_func)) {
 477                 radlog(L_ERR, "rlm_sql (%s): xlat failed.",
 478                         inst->config->xlat_name);
 479                 return -1;
 480         }
 481
 482         if (rlm_sql_select_query(sqlsocket, inst, querystr) < 0) {
 483                 radlog(L_ERR, "rlm_sql (%s): database query error, %s: %s",
 484                         inst->config->xlat_name,querystr,
 485                         (char *)(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                         DEBUG("rlm_sql (%s): row[0] returned NULL",
 494                                 inst->config->xlat_name);
 495                         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 496                         sql_grouplist_free(group_list);
 497                         return -1;
 498                 }
 499                 if (*group_list == NULL) {
 500                         *group_list = rad_malloc(sizeof(SQL_GROUPLIST));
 501                         group_list_tmp = *group_list;
 502                 } else {
 503                         group_list_tmp->next = rad_malloc(sizeof(SQL_GROUPLIST));
 504                         group_list_tmp = group_list_tmp->next;
 505                 }
 506                 group_list_tmp->next = NULL;
 507                 strlcpy(group_list_tmp->groupname, row[0], MAX_STRING_LEN);
 508         }
 509
 510         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 511
 512         return num_groups;
 513 }
 514
 515
 516 /*
 517  * sql groupcmp function. That way we can do group comparisons (in the users file for example)
 518  * with the group memberships reciding in sql
 519  * The group membership query should only return one element which is the username. The returned
 520  * username will then be checked with the passed check string.
 521  */
 522
 523 static int sql_groupcmp(void *instance, REQUEST *req, VALUE_PAIR *request, VALUE_PAIR *check,
 524                         VALUE_PAIR *check_pairs, VALUE_PAIR **reply_pairs)
 525 {
 526         SQLSOCK *sqlsocket;
 527         SQL_INST *inst = instance;
 528         char sqlusername[MAX_STRING_LEN];
 529         SQL_GROUPLIST *group_list, *group_list_tmp;
 530
 531         check_pairs = check_pairs;
 532         reply_pairs = reply_pairs;
 533         request = request;
 534
 535         DEBUG("rlm_sql (%s): - sql_groupcmp", inst->config->xlat_name);
 536         if (!check || !check->vp_strvalue || !check->length){
 537                 DEBUG("rlm_sql (%s): sql_groupcmp: Illegal group name",
 538                       inst->config->xlat_name);
 539                 return 1;
 540         }
 541         if (req == NULL){
 542                 DEBUG("rlm_sql (%s): sql_groupcmp: NULL request",
 543                       inst->config->xlat_name);
 544                 return 1;
 545         }
 546         /*
 547          * Set, escape, and check the user attr here
 548          */
 549         if (sql_set_user(inst, req, sqlusername, NULL) < 0)
 550                 return 1;
 551
 552         /*
 553          *      Get a socket for this lookup
 554          */
 555         sqlsocket = sql_get_socket(inst);
 556         if (sqlsocket == NULL) {
 557                 /* Remove the username we (maybe) added above */
 558                 pairdelete(&req->packet->vps, PW_SQL_USER_NAME);
 559                 return 1;
 560         }
 561
 562         /*
 563          *      Get the list of groups this user is a member of
 564          */
 565         if (sql_get_grouplist(inst, sqlsocket, req, &group_list)) {
 566                 radlog(L_ERR, "rlm_sql (%s): Error getting group membership",
 567                        inst->config->xlat_name);
 568                 /* Remove the username we (maybe) added above */
 569                 pairdelete(&req->packet->vps, PW_SQL_USER_NAME);
 570                 sql_release_socket(inst, sqlsocket);
 571                 return 1;
 572         }
 573
 574         for (group_list_tmp = group_list; group_list_tmp != NULL; group_list_tmp = group_list_tmp->next) {
 575                 if (strcmp(group_list_tmp->groupname, check->vp_strvalue) == 0){
 576                         DEBUG("rlm_sql (%s): - sql_groupcmp finished: User is a member of group %s",
 577                               inst->config->xlat_name,
 578                               (char *)check->vp_strvalue);
 579                         /* Free the grouplist */
 580                         sql_grouplist_free(&group_list);
 581                         /* Remove the username we (maybe) added above */
 582                         pairdelete(&req->packet->vps, PW_SQL_USER_NAME);
 583                         sql_release_socket(inst, sqlsocket);
 584                         return 0;
 585                 }
 586         }
 587
 588         /* Free the grouplist */
 589         sql_grouplist_free(&group_list);
 590         /* Remove the username we (maybe) added above */
 591         pairdelete(&req->packet->vps, PW_SQL_USER_NAME);
 592         sql_release_socket(inst,sqlsocket);
 593
 594         DEBUG("rlm_sql (%s): - sql_groupcmp finished: User is NOT a member of group %s",
 595               inst->config->xlat_name, (char *)check->vp_strvalue);
 596
 597         return 1;
 598 }
 599
 600
 601
 602 static int rlm_sql_process_groups(SQL_INST *inst, REQUEST *request, SQLSOCK *sqlsocket, int *dofallthrough)
 603 {
 604         VALUE_PAIR *check_tmp = NULL;
 605         VALUE_PAIR *reply_tmp = NULL;
 606         SQL_GROUPLIST *group_list, *group_list_tmp;
 607         VALUE_PAIR *sql_group = NULL;
 608         char    querystr[MAX_QUERY_LEN];
 609         int found = 0;
 610         int rows;
 611
 612         /*
 613          *      Get the list of groups this user is a member of
 614          */
 615         if (sql_get_grouplist(inst, sqlsocket, request, &group_list)) {
 616                 radlog(L_ERR, "rlm_sql (%s): Error retrieving group list",
 617                        inst->config->xlat_name);
 618                 return -1;
 619         }
 620
 621         for (group_list_tmp = group_list; group_list_tmp != NULL && *dofallthrough != 0; group_list_tmp = group_list_tmp->next) {
 622                 /*
 623                  *      Add the Sql-Group attribute to the request list so we know
 624                  *      which group we're retrieving attributes for
 625                  */
 626                 sql_group = pairmake("Sql-Group", group_list_tmp->groupname, T_OP_EQ);
 627                 if (!sql_group) {
 628                         radlog(L_ERR, "rlm_sql (%s): Error creating Sql-Group attribute",
 629                                inst->config->xlat_name);
 630                         return -1;
 631                 }
 632                 pairadd(&request->packet->vps, sql_group);
 633                 if (!radius_xlat(querystr, sizeof(querystr), inst->config->authorize_group_check_query, request, sql_escape_func)) {
 634                         radlog(L_ERR, "rlm_sql (%s): Error generating query; rejecting user",
 635                                inst->config->xlat_name);
 636                         /* Remove the grouup we added above */
 637                         pairdelete(&request->packet->vps, PW_SQL_GROUP);
 638                         return -1;
 639                 }
 640                 rows = sql_getvpdata(inst, sqlsocket, &check_tmp, querystr);
 641                 if (rows < 0) {
 642                         radlog(L_ERR, "rlm_sql (%s): Error retrieving check pairs for group %s",
 643                                inst->config->xlat_name, group_list_tmp->groupname);
 644                         /* Remove the grouup we added above */
 645                         pairdelete(&request->packet->vps, PW_SQL_GROUP);
 646                         pairfree(&check_tmp);
 647                         return -1;
 648                 } else if (rows > 0) {
 649                         /*
 650                          *      Only do this if *some* check pairs were returned
 651                          */
 652                         if (paircompare(request, request->packet->vps, check_tmp, &request->reply->vps) == 0) {
 653                                 found = 1;
 654                                 DEBUG2("rlm_sql (%s): User found in group %s",
 655                                         inst->config->xlat_name, group_list_tmp->groupname);
 656                                 /*
 657                                  *      Now get the reply pairs since the paircompare matched
 658                                  */
 659                                 if (!radius_xlat(querystr, sizeof(querystr), inst->config->authorize_group_reply_query, request, sql_escape_func)) {
 660                                         radlog(L_ERR, "rlm_sql (%s): Error generating query; rejecting user",
 661                                                inst->config->xlat_name);
 662                                         /* Remove the grouup we added above */
 663                                         pairdelete(&request->packet->vps, PW_SQL_GROUP);
 664                                         pairfree(&check_tmp);
 665                                         return -1;
 666                                 }
 667                                 if (sql_getvpdata(inst, sqlsocket, &reply_tmp, querystr) < 0) {
 668                                         radlog(L_ERR, "rlm_sql (%s): Error retrieving reply pairs for group %s",
 669                                                inst->config->xlat_name, group_list_tmp->groupname);
 670                                         /* Remove the grouup we added above */
 671                                         pairdelete(&request->packet->vps, PW_SQL_GROUP);
 672                                         pairfree(&check_tmp);
 673                                         pairfree(&reply_tmp);
 674                                         return -1;
 675                                 }
 676                                 *dofallthrough = fallthrough(reply_tmp);
 677                                 pairxlatmove(request, &request->reply->vps, &reply_tmp);
 678                                 pairxlatmove(request, &request->config_items, &check_tmp);
 679                         }
 680                 } else {
 681                         /*
 682                          *      rows == 0.  This is like having the username on a line
 683                          *      in the user's file with no check vp's.  As such, we treat
 684                          *      it as found and add the reply attributes, so that we
 685                          *      match expected behavior
 686                          */
 687                         found = 1;
 688                         DEBUG2("rlm_sql (%s): User found in group %s",
 689                                 inst->config->xlat_name, group_list_tmp->groupname);
 690                         /*
 691                          *      Now get the reply pairs since the paircompare matched
 692                          */
 693                         if (!radius_xlat(querystr, sizeof(querystr), inst->config->authorize_group_reply_query, request, sql_escape_func)) {
 694                                 radlog(L_ERR, "rlm_sql (%s): Error generating query; rejecting user",
 695                                        inst->config->xlat_name);
 696                                 /* Remove the grouup we added above */
 697                                 pairdelete(&request->packet->vps, PW_SQL_GROUP);
 698                                 pairfree(&check_tmp);
 699                                 return -1;
 700                         }
 701                         if (sql_getvpdata(inst, sqlsocket, &reply_tmp, querystr) < 0) {
 702                                 radlog(L_ERR, "rlm_sql (%s): Error retrieving reply pairs for group %s",
 703                                        inst->config->xlat_name, group_list_tmp->groupname);
 704                                 /* Remove the grouup we added above */
 705                                 pairdelete(&request->packet->vps, PW_SQL_GROUP);
 706                                 pairfree(&check_tmp);
 707                                 pairfree(&reply_tmp);
 708                                 return -1;
 709                         }
 710                         *dofallthrough = fallthrough(reply_tmp);
 711                         pairxlatmove(request, &request->reply->vps, &reply_tmp);
 712                         pairxlatmove(request, &request->config_items, &check_tmp);
 713                 }
 714
 715                 /*
 716                  * Delete the Sql-Group we added above
 717                  * And clear out the pairlists
 718                  */
 719                 pairdelete(&request->packet->vps, PW_SQL_GROUP);
 720                 pairfree(&check_tmp);
 721                 pairfree(&reply_tmp);
 722         }
 723
 724         sql_grouplist_free(&group_list);
 725         return found;
 726 }
 727
 728
 729 static int rlm_sql_detach(void *instance)
 730 {
 731         SQL_INST *inst = instance;
 732
 733         if (inst->sqlpool) {
 734                 sql_poolfree(inst);
 735         }
 736
 737         if (inst->config->xlat_name) {
 738                 xlat_unregister(inst->config->xlat_name,(RAD_XLAT_FUNC)sql_xlat);
 739                 free(inst->config->xlat_name);
 740         }
 741
 742         paircompare_unregister(PW_SQL_GROUP, sql_groupcmp);
 743
 744         if (inst->config) {
 745                 int i;
 746
 747                 /*
 748                  *      Free up dynamically allocated string pointers.
 749                  */
 750                 for (i = 0; module_config[i].name != NULL; i++) {
 751                         char **p;
 752                         if (module_config[i].type != PW_TYPE_STRING_PTR) {
 753                                 continue;
 754                         }
 755
 756                         /*
 757                          *      Treat 'config' as an opaque array of bytes,
 758                          *      and take the offset into it.  There's a
 759                          *      (char*) pointer at that offset, and we want
 760                          *      to point to it.
 761                          */
 762                         p = (char **) (((char *)inst->config) + module_config[i].offset);
 763                         if (!*p) { /* nothing allocated */
 764                                 continue;
 765                         }
 766                         free(*p);
 767                         *p = NULL;
 768                 }
 769                 allowed_chars = NULL;
 770                 free(inst->config);
 771                 inst->config = NULL;
 772         }
 773
 774         if (inst->handle) {
 775 #if 0
 776                 /*
 777                  *      FIXME: Call the modules 'destroy' function?
 778                  */
 779                 lt_dlclose(inst->handle);       /* ignore any errors */
 780 #endif
 781         }
 782         free(inst);
 783
 784         return 0;
 785 }
 786 static int rlm_sql_instantiate(CONF_SECTION * conf, void **instance)
 787 {
 788         SQL_INST *inst;
 789         const char *xlat_name;
 790
 791         inst = rad_malloc(sizeof(SQL_INST));
 792         memset(inst, 0, sizeof(SQL_INST));
 793
 794         inst->config = rad_malloc(sizeof(SQL_CONFIG));
 795         memset(inst->config, 0, sizeof(SQL_CONFIG));
 796
 797         /*
 798          * If the configuration parameters can't be parsed, then
 799          * fail.
 800          */
 801         if (cf_section_parse(conf, inst->config, module_config) < 0) {
 802                 rlm_sql_detach(inst);
 803                 return -1;
 804         }
 805
 806         xlat_name = cf_section_name2(conf);
 807         if (xlat_name == NULL)
 808                 xlat_name = cf_section_name1(conf);
 809         if (xlat_name){
 810                 inst->config->xlat_name = strdup(xlat_name);
 811                 xlat_register(xlat_name, (RAD_XLAT_FUNC)sql_xlat, inst);
 812         }
 813
 814         if (inst->config->num_sql_socks > MAX_SQL_SOCKS) {
 815                 radlog(L_ERR | L_CONS, "rlm_sql (%s): sql_instantiate: number of sqlsockets cannot exceed MAX_SQL_SOCKS, %d",
 816                        inst->config->xlat_name, MAX_SQL_SOCKS);
 817                 rlm_sql_detach(inst);
 818                 return -1;
 819         }
 820
 821         /*
 822          *      Sanity check for crazy people.
 823          */
 824         if (strncmp(inst->config->sql_driver, "rlm_sql_", 8) != 0) {
 825                 radlog(L_ERR, "rlm_sql (%s): \"%s\" is NOT an SQL driver!",
 826                        inst->config->xlat_name, inst->config->sql_driver);
 827                 rlm_sql_detach(inst);
 828                 return -1;
 829         }
 830
 831         inst->handle = lt_dlopenext(inst->config->sql_driver);
 832         if (inst->handle == NULL) {
 833                 radlog(L_ERR, "rlm_sql (%s): Could not link driver %s: %s",
 834                        inst->config->xlat_name, inst->config->sql_driver,
 835                        lt_dlerror());
 836                 radlog(L_ERR, "rlm_sql (%s): Make sure it (and all its dependent libraries!) are in the search path of your system's ld.",
 837                        inst->config->xlat_name);
 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, "rlm_sql (%s): Could not link symbol %s: %s",
 845                        inst->config->xlat_name, 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         paircompare_register(PW_SQL_GROUP, PW_USER_NAME, sql_groupcmp, inst);
 864
 865         if (inst->config->do_clients){
 866                 if (generate_sql_clients(inst) == -1){
 867                         radlog(L_ERR, "rlm_sql (%s): generate_sql_clients() returned error",inst->config->xlat_name);
 868                         rlm_sql_detach(inst);
 869                         return -1;
 870                 }
 871         }
 872         allowed_chars = inst->config->allowed_chars;
 873
 874         *instance = inst;
 875
 876         return RLM_MODULE_OK;
 877 }
 878
 879
 880 static int rlm_sql_authorize(void *instance, REQUEST * request)
 881 {
 882         VALUE_PAIR *check_tmp = NULL;
 883         VALUE_PAIR *reply_tmp = NULL;
 884         VALUE_PAIR *user_profile = NULL;
 885         int     found = 0;
 886         int     dofallthrough = 1;
 887         int     rows;
 888         SQLSOCK *sqlsocket;
 889         SQL_INST *inst = instance;
 890         char    querystr[MAX_QUERY_LEN];
 891         char    sqlusername[MAX_STRING_LEN];
 892         /*
 893          * the profile username is used as the sqlusername during
 894          * profile checking so that we don't overwrite the orignal
 895          * sqlusername string
 896          */
 897         char   profileusername[MAX_STRING_LEN];
 898
 899         /*
 900          * Set, escape, and check the user attr here
 901          */
 902         if (sql_set_user(inst, request, sqlusername, NULL) < 0)
 903                 return RLM_MODULE_FAIL;
 904
 905
 906         /*
 907          * reserve a socket
 908          */
 909         sqlsocket = sql_get_socket(inst);
 910         if (sqlsocket == NULL) {
 911                 /* Remove the username we (maybe) added above */
 912                 pairdelete(&request->packet->vps, PW_SQL_USER_NAME);
 913                 return RLM_MODULE_FAIL;
 914         }
 915
 916
 917         /*
 918          *  After this point, ALL 'return's MUST release the SQL socket!
 919          */
 920
 921         /*
 922          * Alright, start by getting the specific entry for the user
 923          */
 924         if (!radius_xlat(querystr, sizeof(querystr), inst->config->authorize_check_query, request, sql_escape_func)) {
 925                 radlog(L_ERR, "rlm_sql (%s): Error generating query; rejecting user",
 926                        inst->config->xlat_name);
 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(L_ERR, "rlm_sql (%s): SQL query error; rejecting user",
 935                        inst->config->xlat_name);
 936                 sql_release_socket(inst, sqlsocket);
 937                 /* Remove the username we (maybe) added above */
 938                 pairdelete(&request->packet->vps, PW_SQL_USER_NAME);
 939                 pairfree(&check_tmp);
 940                 return RLM_MODULE_FAIL;
 941         } else if (rows > 0) {
 942                 /*
 943                  *      Only do this if *some* check pairs were returned
 944                  */
 945                 if (paircompare(request, request->packet->vps, check_tmp, &request->reply->vps) == 0) {
 946                         found = 1;
 947                         DEBUG2("rlm_sql (%s): User found in radcheck table", inst->config->xlat_name);
 948                         /*
 949                          *      Now get the reply pairs since the paircompare matched
 950                          */
 951                         if (!radius_xlat(querystr, sizeof(querystr), inst->config->authorize_reply_query, request, sql_escape_func)) {
 952                                 radlog(L_ERR, "rlm_sql (%s): Error generating query; rejecting user",
 953                                        inst->config->xlat_name);
 954                                 sql_release_socket(inst, sqlsocket);
 955                                 /* Remove the username we (maybe) added above */
 956                                 pairdelete(&request->packet->vps, PW_SQL_USER_NAME);
 957                                 pairfree(&check_tmp);
 958                                 return RLM_MODULE_FAIL;
 959                         }
 960                         if (sql_getvpdata(inst, sqlsocket, &reply_tmp, querystr) < 0) {
 961                                 radlog(L_ERR, "rlm_sql (%s): SQL query error; rejecting user",
 962                                        inst->config->xlat_name);
 963                                 sql_release_socket(inst, sqlsocket);
 964                                 /* Remove the username we (maybe) added above */
 965                                 pairdelete(&request->packet->vps, PW_SQL_USER_NAME);
 966                                 pairfree(&check_tmp);
 967                                 pairfree(&reply_tmp);
 968                                 return RLM_MODULE_FAIL;
 969                         }
 970                         if (!inst->config->read_groups)
 971                                 dofallthrough = fallthrough(reply_tmp);
 972                         pairxlatmove(request, &request->reply->vps, &reply_tmp);
 973                         pairxlatmove(request, &request->config_items, &check_tmp);
 974                 }
 975         }
 976
 977         /*
 978          *      Clear out the pairlists
 979          */
 980         pairfree(&check_tmp);
 981         pairfree(&reply_tmp);
 982
 983         /*
 984          *      dofallthrough is set to 1 by default so that if the user information
 985          *      is not found, we will still process groups.  If the user information,
 986          *      however, *is* found, Fall-Through must be set in order to process
 987          *      the groups as well
 988          */
 989         if (dofallthrough) {
 990                 rows = rlm_sql_process_groups(inst, request, sqlsocket, &dofallthrough);
 991                 if (rows < 0) {
 992                         radlog(L_ERR, "rlm_sql (%s): Error processing groups; rejecting user",
 993                                inst->config->xlat_name);
 994                         sql_release_socket(inst, sqlsocket);
 995                         /* Remove the username we (maybe) added above */
 996                         pairdelete(&request->packet->vps, PW_SQL_USER_NAME);
 997                         return RLM_MODULE_FAIL;
 998                 } else if (rows > 0) {
 999                         found = 1;
1000                 }
1001         }
1002
1003         /*
1004          *      repeat the above process with the default profile or User-Profile
1005          */
1006         if (dofallthrough) {
1007                 int profile_found = 0;
1008                 /*
1009                 * Check for a default_profile or for a User-Profile.
1010                 */
1011                 user_profile = pairfind(request->config_items, PW_USER_PROFILE);
1012                 if (inst->config->default_profile[0] != 0 || user_profile != NULL){
1013                         char *profile = inst->config->default_profile;
1014
1015                         if (user_profile != NULL)
1016                                 profile = user_profile->vp_strvalue;
1017                         if (profile && strlen(profile)){
1018                                 radlog(L_DBG, "rlm_sql (%s): Checking profile %s",
1019                                        inst->config->xlat_name, profile);
1020                                 if (sql_set_user(inst, request, profileusername, profile) < 0) {
1021                                         radlog(L_ERR, "rlm_sql (%s): Error setting profile; rejecting user",
1022                                                inst->config->xlat_name);
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(L_ERR, "rlm_sql (%s): Error processing profile groups; rejecting user",
1037                                        inst->config->xlat_name);
1038                                 sql_release_socket(inst, sqlsocket);
1039                                 /* Remove the username we (maybe) added above */
1040                                 pairdelete(&request->packet->vps, PW_SQL_USER_NAME);
1041                                 return RLM_MODULE_FAIL;
1042                         } else if (rows > 0) {
1043                                 found = 1;
1044                         }
1045                 }
1046         }
1047
1048         /* Remove the username we (maybe) added above */
1049         pairdelete(&request->packet->vps, PW_SQL_USER_NAME);
1050         sql_release_socket(inst, sqlsocket);
1051
1052         if (!found) {
1053                 radlog(L_DBG, "rlm_sql (%s): User %s not found",
1054                        inst->config->xlat_name, sqlusername);
1055                 return RLM_MODULE_NOTFOUND;
1056         } else {
1057                 return RLM_MODULE_OK;
1058         }
1059 }
1060
1061 /*
1062  *      Accounting: save the account data to our sql table
1063  */
1064 static int rlm_sql_accounting(void *instance, REQUEST * request) {
1065
1066         SQLSOCK *sqlsocket = NULL;
1067         VALUE_PAIR *pair;
1068         SQL_INST *inst = instance;
1069         int     ret = RLM_MODULE_OK;
1070         int     numaffected = 0;
1071         int     acctstatustype = 0;
1072         char    querystr[MAX_QUERY_LEN];
1073         char    logstr[MAX_QUERY_LEN];
1074         char    sqlusername[MAX_STRING_LEN];
1075
1076 #ifdef CISCO_ACCOUNTING_HACK
1077         int     acctsessiontime = 0;
1078 #endif
1079
1080         memset(querystr, 0, MAX_QUERY_LEN);
1081
1082         /*
1083          * Find the Acct Status Type
1084          */
1085         if ((pair = pairfind(request->packet->vps, PW_ACCT_STATUS_TYPE)) != NULL) {
1086                 acctstatustype = pair->lvalue;
1087         } else {
1088                 radius_xlat(logstr, sizeof(logstr), "packet has no accounting status type. [user '%{User-Name}', nas '%{NAS-IP-Address}']", request, NULL);
1089                 radlog(L_ERR, "rlm_sql (%s) in sql_accounting: %s",
1090                        inst->config->xlat_name, logstr);
1091                 return RLM_MODULE_INVALID;
1092         }
1093
1094         switch (acctstatustype) {
1095                         /*
1096                          * The Terminal server informed us that it was rebooted
1097                          * STOP all records from this NAS
1098                          */
1099                 case PW_STATUS_ACCOUNTING_ON:
1100                 case PW_STATUS_ACCOUNTING_OFF:
1101                         radlog(L_INFO, "rlm_sql (%s): received Acct On/Off packet", inst->config->xlat_name);
1102                         radius_xlat(querystr, sizeof(querystr), inst->config->accounting_onoff_query, request, sql_escape_func);
1103                         query_log(request, inst, querystr);
1104
1105                         sqlsocket = sql_get_socket(inst);
1106                         if (sqlsocket == NULL)
1107                                 return(RLM_MODULE_FAIL);
1108                         if (*querystr) { /* non-empty query */
1109                                 if (rlm_sql_query(sqlsocket, inst, querystr)) {
1110                                         radlog(L_ERR, "rlm_sql (%s): Couldn't update SQL accounting for Acct On/Off packet - %s",
1111                                                inst->config->xlat_name,
1112                                                (char *)(inst->module->sql_error)(sqlsocket, inst->config));
1113                                         ret = RLM_MODULE_FAIL;
1114                                 }
1115                                 (inst->module->sql_finish_query)(sqlsocket, inst->config);
1116                         }
1117
1118                         break;
1119
1120                         /*
1121                          * Got an update accounting packet
1122                          */
1123                 case PW_STATUS_ALIVE:
1124
1125                         /*
1126                          * Set, escape, and check the user attr here
1127                          */
1128                         sql_set_user(inst, request, sqlusername, NULL);
1129
1130                         radius_xlat(querystr, sizeof(querystr), inst->config->accounting_update_query, request, sql_escape_func);
1131                         query_log(request, inst, querystr);
1132
1133                         sqlsocket = sql_get_socket(inst);
1134                         if (sqlsocket == NULL)
1135                                 return(RLM_MODULE_FAIL);
1136                         if (*querystr) { /* non-empty query */
1137                                 if (rlm_sql_query(sqlsocket, inst, querystr)) {
1138                                         radlog(L_ERR, "rlm_sql (%s): Couldn't update SQL accounting ALIVE record - %s",
1139                                                inst->config->xlat_name,
1140                                                (char *)(inst->module->sql_error)(sqlsocket, inst->config));
1141                                         ret = RLM_MODULE_FAIL;
1142                                 }
1143                                 else {
1144                                         numaffected = (inst->module->sql_affected_rows)(sqlsocket, inst->config);
1145                                         if (numaffected < 1) {
1146
1147                                                 /*
1148                                                  * If our update above didn't match anything
1149                                                  * we assume it's because we haven't seen a
1150                                                  * matching Start record.  So we have to
1151                                                  * insert this update rather than do an update
1152                                                  */
1153                                                 radius_xlat(querystr, sizeof(querystr), inst->config->accounting_update_query_alt, request, sql_escape_func);
1154                                                 query_log(request, inst, querystr);
1155                                                 if (*querystr) { /* non-empty query */
1156                                                         if (rlm_sql_query(sqlsocket, inst, querystr)) {
1157                                                                 radlog(L_ERR, "rlm_sql (%s): Couldn't insert SQL accounting ALIVE record - %s",
1158                                                                            inst->config->xlat_name,
1159                                                                            (char *)(inst->module->sql_error)(sqlsocket, inst->config));
1160                                                                 ret = RLM_MODULE_FAIL;
1161                                                         }
1162                                                         (inst->module->sql_finish_query)(sqlsocket, inst->config);
1163                                                 }
1164                                         }
1165                                 }
1166                                 (inst->module->sql_finish_query)(sqlsocket, inst->config);
1167                         }
1168                         break;
1169
1170                         /*
1171                          * Got accounting start packet
1172                          */
1173                 case PW_STATUS_START:
1174
1175                         /*
1176                          * Set, escape, and check the user attr here
1177                          */
1178                         sql_set_user(inst, request, sqlusername, NULL);
1179
1180                         radius_xlat(querystr, sizeof(querystr), inst->config->accounting_start_query, request, sql_escape_func);
1181                         query_log(request, inst, querystr);
1182
1183                         sqlsocket = sql_get_socket(inst);
1184                         if (sqlsocket == NULL)
1185                                 return(RLM_MODULE_FAIL);
1186                         if (*querystr) { /* non-empty query */
1187                                 if (rlm_sql_query(sqlsocket, inst, querystr)) {
1188                                         radlog(L_ERR, "rlm_sql (%s): Couldn't insert SQL accounting START record - %s",
1189                                                inst->config->xlat_name,
1190                                                (char *)(inst->module->sql_error)(sqlsocket, inst->config));
1191
1192                                         /*
1193                                          * We failed the insert above.  It's probably because
1194                                          * the stop record came before the start.  We try
1195                                          * our alternate query now (typically an UPDATE)
1196                                          */
1197                                         radius_xlat(querystr, sizeof(querystr), inst->config->accounting_start_query_alt, request, sql_escape_func);
1198                                         query_log(request, inst, querystr);
1199
1200                                         if (*querystr) { /* non-empty query */
1201                                                 if (rlm_sql_query(sqlsocket, inst, querystr)) {
1202                                                         radlog(L_ERR, "rlm_sql (%s): Couldn't update SQL accounting START record - %s",
1203                                                                inst->config->xlat_name,
1204                                                                (char *)(inst->module->sql_error)(sqlsocket, inst->config));
1205                                                         ret = RLM_MODULE_FAIL;
1206                                                 }
1207                                                 (inst->module->sql_finish_query)(sqlsocket, inst->config);
1208                                         }
1209                                 }
1210                                 (inst->module->sql_finish_query)(sqlsocket, inst->config);
1211                         }
1212                         break;
1213
1214                         /*
1215                          * Got accounting stop packet
1216                          */
1217                 case PW_STATUS_STOP:
1218
1219                         /*
1220                          * Set, escape, and check the user attr here
1221                          */
1222                         sql_set_user(inst, request, sqlusername, NULL);
1223
1224                         radius_xlat(querystr, sizeof(querystr), inst->config->accounting_stop_query, request, sql_escape_func);
1225                         query_log(request, inst, querystr);
1226
1227                         sqlsocket = sql_get_socket(inst);
1228                         if (sqlsocket == NULL)
1229                                 return(RLM_MODULE_FAIL);
1230                         if (*querystr) { /* non-empty query */
1231                                 if (rlm_sql_query(sqlsocket, inst, querystr)) {
1232                                         radlog(L_ERR, "rlm_sql (%s): Couldn't update SQL accounting STOP record - %s",
1233                                                inst->config->xlat_name,
1234                                                (char *)(inst->module->sql_error)(sqlsocket, inst->config));
1235                                         ret = RLM_MODULE_FAIL;
1236                                 }
1237                                 else {
1238                                         numaffected = (inst->module->sql_affected_rows)(sqlsocket, inst->config);
1239                                         if (numaffected < 1) {
1240                                                 /*
1241                                                  * If our update above didn't match anything
1242                                                  * we assume it's because we haven't seen a
1243                                                  * matching Start record.  So we have to
1244                                                  * insert this stop rather than do an update
1245                                                  */
1246 #ifdef CISCO_ACCOUNTING_HACK
1247                                                 /*
1248                                                  * If stop but zero session length AND no previous
1249                                                  * session found, drop it as in invalid packet
1250                                                  * This is to fix CISCO's aaa from filling our
1251                                                  * table with bogus crap
1252                                                  */
1253                                                 if ((pair = pairfind(request->packet->vps, PW_ACCT_SESSION_TIME)) != NULL)
1254                                                         acctsessiontime = pair->lvalue;
1255
1256                                                 if (acctsessiontime <= 0) {
1257                                                         radius_xlat(logstr, sizeof(logstr), "stop packet with zero session length. [user '%{User-Name}', nas '%{NAS-IP-Address}']", request, NULL);
1258                                                         radlog(L_ERR, "rlm_sql (%s) in sql_accounting: %s", inst->config->xlat_name, logstr);
1259                                                         sql_release_socket(inst, sqlsocket);
1260                                                         ret = RLM_MODULE_NOOP;
1261                                                 }
1262 #endif
1263
1264                                                 radius_xlat(querystr, sizeof(querystr), inst->config->accounting_stop_query_alt, request, sql_escape_func);
1265                                                 query_log(request, inst, querystr);
1266
1267                                                 if (*querystr) { /* non-empty query */
1268                                                         if (rlm_sql_query(sqlsocket, inst, querystr)) {
1269                                                                 radlog(L_ERR, "rlm_sql (%s): Couldn't insert SQL accounting STOP record - %s",
1270                                                                                 inst->config->xlat_name,
1271                                                                                 (char *)(inst->module->sql_error)(sqlsocket, inst->config));
1272                                                                 ret = RLM_MODULE_FAIL;
1273                                                         }
1274                                                         (inst->module->sql_finish_query)(sqlsocket, inst->config);
1275                                                 }
1276                                         }
1277                                 }
1278                                 (inst->module->sql_finish_query)(sqlsocket, inst->config);
1279                         }
1280                         break;
1281
1282                         /*
1283                          *      Anything else is ignored.
1284                          */
1285                 default:
1286                         radlog(L_INFO, "rlm_sql (%s): Unsupported Acct-Status-Type = %d", inst->config->xlat_name, acctstatustype);
1287                         return RLM_MODULE_NOOP;
1288                         break;
1289
1290         }
1291
1292         sql_release_socket(inst, sqlsocket);
1293
1294         return ret;
1295 }
1296
1297
1298 /*
1299  *        See if a user is already logged in. Sets request->simul_count to the
1300  *        current session count for this user.
1301  *
1302  *        Check twice. If on the first pass the user exceeds his
1303  *        max. number of logins, do a second pass and validate all
1304  *        logins by querying the terminal server (using eg. SNMP).
1305  */
1306
1307 static int rlm_sql_checksimul(void *instance, REQUEST * request) {
1308         SQLSOCK         *sqlsocket;
1309         SQL_INST        *inst = instance;
1310         SQL_ROW         row;
1311         char            querystr[MAX_QUERY_LEN];
1312         char            sqlusername[MAX_STRING_LEN];
1313         int             check = 0;
1314         uint32_t        ipno = 0;
1315         char            *call_num = NULL;
1316         VALUE_PAIR      *vp;
1317         int             ret;
1318         uint32_t        nas_addr = 0;
1319         int             nas_port = 0;
1320
1321         /* If simul_count_query is not defined, we don't do any checking */
1322         if (inst->config->simul_count_query[0] == 0) {
1323                 return RLM_MODULE_NOOP;
1324         }
1325
1326         if((request->username == NULL) || (request->username->length == 0)) {
1327                 radlog(L_ERR, "rlm_sql (%s): Zero Length username not permitted\n", inst->config->xlat_name);
1328                 return RLM_MODULE_INVALID;
1329         }
1330
1331
1332         if(sql_set_user(inst, request, sqlusername, NULL) < 0)
1333                 return RLM_MODULE_FAIL;
1334
1335         radius_xlat(querystr, sizeof(querystr), inst->config->simul_count_query, request, sql_escape_func);
1336
1337         /* initialize the sql socket */
1338         sqlsocket = sql_get_socket(inst);
1339         if(sqlsocket == NULL)
1340                 return RLM_MODULE_FAIL;
1341
1342         if(rlm_sql_select_query(sqlsocket, inst, querystr)) {
1343                 radlog(L_ERR, "rlm_sql (%s) sql_checksimul: Database query failed", inst->config->xlat_name);
1344                 sql_release_socket(inst, sqlsocket);
1345                 return RLM_MODULE_FAIL;
1346         }
1347
1348         ret = rlm_sql_fetch_row(sqlsocket, inst);
1349
1350         if (ret != 0) {
1351                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1352                 sql_release_socket(inst, sqlsocket);
1353                 return RLM_MODULE_FAIL;
1354         }
1355
1356         row = sqlsocket->row;
1357         if (row == NULL) {
1358                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1359                 sql_release_socket(inst, sqlsocket);
1360                 return RLM_MODULE_FAIL;
1361         }
1362
1363         request->simul_count = atoi(row[0]);
1364         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1365
1366         if(request->simul_count < request->simul_max) {
1367                 sql_release_socket(inst, sqlsocket);
1368                 return RLM_MODULE_OK;
1369         }
1370
1371         /*
1372          *      Looks like too many sessions, so let's start verifying
1373          *      them, unless told to rely on count query only.
1374          */
1375         if (inst->config->simul_verify_query[0] == '\0') {
1376                 sql_release_socket(inst, sqlsocket);
1377                 return RLM_MODULE_OK;
1378         }
1379
1380         radius_xlat(querystr, sizeof(querystr), inst->config->simul_verify_query, request, sql_escape_func);
1381         if(rlm_sql_select_query(sqlsocket, inst, querystr)) {
1382                 radlog(L_ERR, "rlm_sql (%s): sql_checksimul: Database query error", inst->config->xlat_name);
1383                 sql_release_socket(inst, sqlsocket);
1384                 return RLM_MODULE_FAIL;
1385         }
1386
1387         /*
1388          *      Setup some stuff, like for MPP detection.
1389          */
1390         request->simul_count = 0;
1391
1392         if ((vp = pairfind(request->packet->vps, PW_FRAMED_IP_ADDRESS)) != NULL)
1393                 ipno = vp->lvalue;
1394         if ((vp = pairfind(request->packet->vps, PW_CALLING_STATION_ID)) != NULL)
1395                 call_num = vp->vp_strvalue;
1396
1397
1398         while (rlm_sql_fetch_row(sqlsocket, inst) == 0) {
1399                 row = sqlsocket->row;
1400                 if (row == NULL)
1401                         break;
1402                 if (!row[2]){
1403                         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1404                         sql_release_socket(inst, sqlsocket);
1405                         DEBUG("rlm_sql (%s): Cannot zap stale entry. No username present in entry.", inst->config->xlat_name);
1406                         return RLM_MODULE_FAIL;
1407                 }
1408                 if (!row[1]){
1409                         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1410                         sql_release_socket(inst, sqlsocket);
1411                         DEBUG("rlm_sql (%s): Cannot zap stale entry. No session id in entry.", inst->config->xlat_name);
1412                         return RLM_MODULE_FAIL;
1413                 }
1414                 if (row[3])
1415                         nas_addr = inet_addr(row[3]);
1416                 if (row[4])
1417                         nas_port = atoi(row[4]);
1418
1419                 check = rad_check_ts(nas_addr, nas_port, row[2], row[1]);
1420
1421                 if (check == 0) {
1422                         /*
1423                          *      Stale record - zap it.
1424                          */
1425                         if (inst->config->deletestalesessions == TRUE) {
1426                                 uint32_t framed_addr = 0;
1427                                 char proto = 0;
1428                                 int sess_time = 0;
1429
1430                                 if (row[5])
1431                                         framed_addr = inet_addr(row[5]);
1432                                 if (row[7]){
1433                                         if (strcmp(row[7], "PPP") == 0)
1434                                                 proto = 'P';
1435                                         else if (strcmp(row[7], "SLIP") == 0)
1436                                                 proto = 'S';
1437                                 }
1438                                 if (row[8])
1439                                         sess_time = atoi(row[8]);
1440                                 session_zap(request, nas_addr, nas_port,
1441                                             row[2], row[1], framed_addr,
1442                                             proto, sess_time);
1443                         }
1444                 }
1445                 else if (check == 1) {
1446                         /*
1447                          *      User is still logged in.
1448                          */
1449                         ++request->simul_count;
1450
1451                         /*
1452                          *      Does it look like a MPP attempt?
1453                          */
1454                         if (row[5] && ipno && inet_addr(row[5]) == ipno)
1455                                 request->simul_mpp = 2;
1456                         else if (row[6] && call_num &&
1457                                 !strncmp(row[6],call_num,16))
1458                                 request->simul_mpp = 2;
1459                 }
1460                 else {
1461                         /*
1462                          *      Failed to check the terminal server for
1463                          *      duplicate logins: return an error.
1464                          */
1465                         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1466                         sql_release_socket(inst, sqlsocket);
1467                         radlog(L_ERR, "rlm_sql (%s): sql_checksimul: Failed to check the terminal server for user '%s'.", inst->config->xlat_name, row[2]);
1468                         return RLM_MODULE_FAIL;
1469                 }
1470         }
1471
1472         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1473         sql_release_socket(inst, sqlsocket);
1474
1475         /*
1476          *      The Auth module apparently looks at request->simul_count,
1477          *      not the return value of this module when deciding to deny
1478          *      a call for too many sessions.
1479          */
1480         return RLM_MODULE_OK;
1481 }
1482
1483 /*
1484  *      Execute postauth_query after authentication
1485  */
1486 static int rlm_sql_postauth(void *instance, REQUEST *request) {
1487         SQLSOCK         *sqlsocket = NULL;
1488         SQL_INST        *inst = instance;
1489         char            querystr[MAX_QUERY_LEN];
1490         char            sqlusername[MAX_STRING_LEN];
1491
1492         DEBUG("rlm_sql (%s): Processing sql_postauth", inst->config->xlat_name);
1493
1494         if(sql_set_user(inst, request, sqlusername, NULL) < 0)
1495                 return RLM_MODULE_FAIL;
1496
1497         /* If postauth_query is not defined, we stop here */
1498         if (inst->config->postauth_query[0] == '\0')
1499                 return RLM_MODULE_NOOP;
1500
1501         /* Expand variables in the query */
1502         memset(querystr, 0, MAX_QUERY_LEN);
1503         radius_xlat(querystr, sizeof(querystr), inst->config->postauth_query,
1504                     request, sql_escape_func);
1505         query_log(request, inst, querystr);
1506         DEBUG2("rlm_sql (%s) in sql_postauth: query is %s",
1507                inst->config->xlat_name, querystr);
1508
1509         /* Initialize the sql socket */
1510         sqlsocket = sql_get_socket(inst);
1511         if (sqlsocket == NULL)
1512                 return RLM_MODULE_FAIL;
1513
1514         /* Process the query */
1515         if (rlm_sql_query(sqlsocket, inst, querystr)) {
1516                 radlog(L_ERR, "rlm_sql (%s) in sql_postauth: Database query error - %s",
1517                        inst->config->xlat_name,
1518                        (char *)(inst->module->sql_error)(sqlsocket, inst->config));
1519                 sql_release_socket(inst, sqlsocket);
1520                 return RLM_MODULE_FAIL;
1521         }
1522         (inst->module->sql_finish_query)(sqlsocket, inst->config);
1523
1524         sql_release_socket(inst, sqlsocket);
1525         return RLM_MODULE_OK;
1526 }
1527
1528 /* globally exported name */
1529 module_t rlm_sql = {
1530         RLM_MODULE_INIT,
1531         "SQL",
1532         RLM_TYPE_THREAD_SAFE,   /* type: reserved */
1533         rlm_sql_instantiate,    /* instantiation */
1534         rlm_sql_detach,         /* detach */
1535         {
1536                 NULL,                   /* authentication */
1537                 rlm_sql_authorize,      /* authorization */
1538                 NULL,                   /* preaccounting */
1539                 rlm_sql_accounting,     /* accounting */
1540                 rlm_sql_checksimul,     /* checksimul */
1541                 NULL,                   /* pre-proxy */
1542                 NULL,                   /* post-proxy */
1543                 rlm_sql_postauth        /* post-auth */
1544         },
1545 };