src/modules/rlm_sql/rlm_sql.c

   1
   2 /*
   3  * rlm_sql.c            SQL Module
   4  *              Main SQL module file. Most ICRADIUS code is located in sql.c
   5  *
   6  * Version:     $Id$
   7  *
   8  *   This program is free software; you can redistribute it and/or modify
   9  *   it under the terms of the GNU General Public License as published by
  10  *   the Free Software Foundation; either version 2 of the License, or
  11  *   (at your option) any later version.
  12  *
  13  *   This program is distributed in the hope that it will be useful,
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *   GNU General Public License for more details.
  17  *
  18  *   You should have received a copy of the GNU General Public License
  19  *   along with this program; if not, write to the Free Software
  20  *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  *
  22  * Copyright 2012  Arran Cudbard-Bell <a.cudbardb@freeradius.org>
  23  * Copyright 2000,2006  The FreeRADIUS server project
  24  * Copyright 2000  Mike Machado <mike@innercite.com>
  25  * Copyright 2000  Alan DeKok <aland@ox.org>
  26  */
  27
  28 #include <freeradius-devel/ident.h>
  29 RCSID("$Id$")
  30
  31 #include <ctype.h>
  32
  33 #include <freeradius-devel/radiusd.h>
  34 #include <freeradius-devel/modules.h>
  35 #include <freeradius-devel/token.h>
  36 #include <freeradius-devel/rad_assert.h>
  37
  38 #include <sys/stat.h>
  39
  40 #include "rlm_sql.h"
  41
  42 static const CONF_PARSER section_config[] = {
  43         { "reference",  PW_TYPE_STRING_PTR,
  44           offsetof(rlm_sql_config_section_t, reference), NULL, ".query"},
  45
  46         {"logfile", PW_TYPE_STRING_PTR,
  47          offsetof(rlm_sql_config_section_t, logfile), NULL, NULL},
  48         {NULL, -1, 0, NULL, NULL}
  49 };
  50
  51 static const CONF_PARSER module_config[] = {
  52         {"driver",PW_TYPE_STRING_PTR,
  53          offsetof(SQL_CONFIG,sql_driver), NULL, "mysql"},
  54         {"server",PW_TYPE_STRING_PTR,
  55          offsetof(SQL_CONFIG,sql_server), NULL, "localhost"},
  56         {"port",PW_TYPE_STRING_PTR,
  57          offsetof(SQL_CONFIG,sql_port), NULL, ""},
  58         {"login", PW_TYPE_STRING_PTR,
  59          offsetof(SQL_CONFIG,sql_login), NULL, ""},
  60         {"password", PW_TYPE_STRING_PTR,
  61          offsetof(SQL_CONFIG,sql_password), NULL, ""},
  62         {"radius_db", PW_TYPE_STRING_PTR,
  63          offsetof(SQL_CONFIG,sql_db), NULL, "radius"},
  64         {"filename", PW_TYPE_FILENAME, /* for sqlite */
  65          offsetof(SQL_CONFIG,sql_file), NULL, NULL},
  66         {"read_groups", PW_TYPE_BOOLEAN,
  67          offsetof(SQL_CONFIG,read_groups), NULL, "yes"},
  68         {"readclients", PW_TYPE_BOOLEAN,
  69          offsetof(SQL_CONFIG,do_clients), NULL, "no"},
  70         {"deletestalesessions", PW_TYPE_BOOLEAN,
  71          offsetof(SQL_CONFIG,deletestalesessions), NULL, "yes"},
  72         {"sql_user_name", PW_TYPE_STRING_PTR,
  73          offsetof(SQL_CONFIG,query_user), NULL, ""},
  74         {"logfile", PW_TYPE_STRING_PTR,
  75          offsetof(SQL_CONFIG,logfile), NULL, NULL},
  76         {"default_user_profile", PW_TYPE_STRING_PTR,
  77          offsetof(SQL_CONFIG,default_profile), NULL, ""},
  78         {"nas_query", PW_TYPE_STRING_PTR,
  79          offsetof(SQL_CONFIG,nas_query), NULL, "SELECT id,nasname,shortname,type,secret FROM nas"},
  80         {"authorize_check_query", PW_TYPE_STRING_PTR,
  81          offsetof(SQL_CONFIG,authorize_check_query), NULL, ""},
  82         {"authorize_reply_query", PW_TYPE_STRING_PTR,
  83          offsetof(SQL_CONFIG,authorize_reply_query), NULL, NULL},
  84         {"authorize_group_check_query", PW_TYPE_STRING_PTR,
  85          offsetof(SQL_CONFIG,authorize_group_check_query), NULL, ""},
  86         {"authorize_group_reply_query", PW_TYPE_STRING_PTR,
  87          offsetof(SQL_CONFIG,authorize_group_reply_query), NULL, ""},
  88         {"group_membership_query", PW_TYPE_STRING_PTR,
  89          offsetof(SQL_CONFIG,groupmemb_query), NULL, NULL},
  90 #ifdef WITH_SESSION_MGMT
  91         {"simul_count_query", PW_TYPE_STRING_PTR,
  92          offsetof(SQL_CONFIG,simul_count_query), NULL, ""},
  93         {"simul_verify_query", PW_TYPE_STRING_PTR,
  94          offsetof(SQL_CONFIG,simul_verify_query), NULL, ""},
  95 #endif
  96         {"safe-characters", PW_TYPE_STRING_PTR,
  97          offsetof(SQL_CONFIG,allowed_chars), NULL,
  98         "@abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.-_: /"},
  99
 100         /*
 101          *      This only works for a few drivers.
 102          */
 103         {"query_timeout", PW_TYPE_INTEGER,
 104          offsetof(SQL_CONFIG,query_timeout), NULL, NULL},
 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, 0);
 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(REQUEST *, char *out, size_t outlen, const char *in, void *arg);
 127
 128 /*
 129  *                      SQL xlat function
 130  *
 131  *  For selects the first value of the first column will be returned,
 132  *  for inserts, updates and deletes the number of rows afftected will be
 133  *  returned instead.
 134  */
 135 static size_t sql_xlat(void *instance, REQUEST *request,
 136                     const char *fmt, char *out, size_t freespace)
 137 {
 138         SQLSOCK *sqlsocket;
 139         SQL_ROW row;
 140         SQL_INST *inst = instance;
 141         char querystr[MAX_QUERY_LEN];
 142         char sqlusername[MAX_STRING_LEN];
 143         size_t ret = 0;
 144
 145         RDEBUG("sql_xlat");
 146
 147         /*
 148          * Add SQL-User-Name attribute just in case it is needed
 149          *  We could search the string fmt for SQL-User-Name to see if this is
 150          *  needed or not
 151          */
 152         sql_set_user(inst, request, sqlusername, NULL);
 153         /*
 154          * Do an xlat on the provided string (nice recursive operation).
 155          */
 156         if (!radius_xlat(querystr, sizeof(querystr), fmt, request, sql_escape_func, inst)) {
 157                 radlog(L_ERR, "rlm_sql (%s): xlat failed.",
 158                        inst->config->xlat_name);
 159                 return 0;
 160         }
 161
 162         sqlsocket = sql_get_socket(inst);
 163         if (sqlsocket == NULL)
 164                 return 0;
 165
 166         rlm_sql_query_log(inst, request, NULL, querystr);
 167
 168         /*
 169          *      If the query starts with any of the following prefixes,
 170          *      then return the number of rows affected
 171          */
 172         if ((strncasecmp(querystr, "insert", 6) == 0) ||
 173             (strncasecmp(querystr, "update", 6) == 0) ||
 174             (strncasecmp(querystr, "delete", 6) == 0)) {
 175                 int numaffected;
 176                 char buffer[21]; /* 64bit max is 20 decimal chars + null byte */
 177
 178                 if (rlm_sql_query(&sqlsocket,inst,querystr)) {
 179                         sql_release_socket(inst,sqlsocket);
 180
 181                         return 0;
 182                 }
 183
 184                 numaffected = (inst->module->sql_affected_rows)(sqlsocket,
 185                                                                 inst->config);
 186                 if (numaffected < 1) {
 187                         RDEBUG("rlm_sql (%s): SQL query affected no rows",
 188                                 inst->config->xlat_name);
 189                 }
 190
 191                 /*
 192                  *      Don't chop the returned number if freespace is
 193                  *      too small.  This hack is necessary because
 194                  *      some implementations of snprintf return the
 195                  *      size of the written data, and others return
 196                  *      the size of the data they *would* have written
 197                  *      if the output buffer was large enough.
 198                  */
 199                 snprintf(buffer, sizeof(buffer), "%d", numaffected);
 200                 ret = strlen(buffer);
 201                 if (ret >= freespace){
 202                         RDEBUG("rlm_sql (%s): Can't write result, insufficient string space",
 203                                inst->config->xlat_name);
 204                         (inst->module->sql_finish_query)(sqlsocket,
 205                                                          inst->config);
 206                         sql_release_socket(inst,sqlsocket);
 207                         return 0;
 208                 }
 209
 210                 memcpy(out, buffer, ret + 1); /* we did bounds checking above */
 211
 212                 (inst->module->sql_finish_query)(sqlsocket, inst->config);
 213                 sql_release_socket(inst,sqlsocket);
 214                 return ret;
 215         } /* else it's a SELECT statement */
 216
 217         if (rlm_sql_select_query(&sqlsocket,inst,querystr)){
 218                 sql_release_socket(inst,sqlsocket);
 219                 return 0;
 220         }
 221
 222         ret = rlm_sql_fetch_row(&sqlsocket, inst);
 223         if (ret) {
 224                 RDEBUG("SQL query did not succeed");
 225                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 226                 sql_release_socket(inst,sqlsocket);
 227                 return 0;
 228         }
 229
 230         row = sqlsocket->row;
 231         if (row == NULL) {
 232                 RDEBUG("SQL query did not return any results");
 233                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 234                 sql_release_socket(inst,sqlsocket);
 235                 return 0;
 236         }
 237
 238         if (row[0] == NULL){
 239                 RDEBUG("Null value in first column");
 240                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 241                 sql_release_socket(inst,sqlsocket);
 242                 return 0;
 243         }
 244         ret = strlen(row[0]);
 245         if (ret >= freespace){
 246                 RDEBUG("Insufficient string space");
 247                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 248                 sql_release_socket(inst,sqlsocket);
 249                 return 0;
 250         }
 251
 252         strlcpy(out,row[0],freespace);
 253
 254         RDEBUG("sql_xlat finished");
 255
 256         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 257         sql_release_socket(inst,sqlsocket);
 258         return ret;
 259 }
 260
 261 static int generate_sql_clients(SQL_INST *inst)
 262 {
 263         SQLSOCK *sqlsocket;
 264         SQL_ROW row;
 265         char querystr[MAX_QUERY_LEN];
 266         RADCLIENT *c;
 267         char *prefix_ptr = NULL;
 268         unsigned int i = 0;
 269         int numf = 0;
 270
 271         DEBUG("rlm_sql (%s): Processing generate_sql_clients",
 272               inst->config->xlat_name);
 273
 274         /* NAS query isn't xlat'ed */
 275         strlcpy(querystr, inst->config->nas_query, sizeof(querystr));
 276         DEBUG("rlm_sql (%s) in generate_sql_clients: query is %s",
 277               inst->config->xlat_name, querystr);
 278
 279         sqlsocket = sql_get_socket(inst);
 280         if (sqlsocket == NULL)
 281                 return -1;
 282         if (rlm_sql_select_query(&sqlsocket,inst,querystr)){
 283                 return -1;
 284         }
 285
 286         while(rlm_sql_fetch_row(&sqlsocket, inst) == 0) {
 287                 i++;
 288                 row = sqlsocket->row;
 289                 if (row == NULL)
 290                         break;
 291                 /*
 292                  *  The return data for each row MUST be in the following order:
 293                  *
 294                  *  0. Row ID (currently unused)
 295                  *  1. Name (or IP address)
 296                  *  2. Shortname
 297                  *  3. Type
 298                  *  4. Secret
 299                  *  5. Virtual Server (optional)
 300                  */
 301                 if (!row[0]){
 302                         radlog(L_ERR, "rlm_sql (%s): No row id found on pass %d",inst->config->xlat_name,i);
 303                         continue;
 304                 }
 305                 if (!row[1]){
 306                         radlog(L_ERR, "rlm_sql (%s): No nasname found for row %s",inst->config->xlat_name,row[0]);
 307                         continue;
 308                 }
 309                 if (!row[2]){
 310                         radlog(L_ERR, "rlm_sql (%s): No short name found for row %s",inst->config->xlat_name,row[0]);
 311                         continue;
 312                 }
 313                 if (!row[4]){
 314                         radlog(L_ERR, "rlm_sql (%s): No secret found for row %s",inst->config->xlat_name,row[0]);
 315                         continue;
 316                 }
 317
 318                 DEBUG("rlm_sql (%s): Read entry nasname=%s,shortname=%s,secret=%s",inst->config->xlat_name,
 319                         row[1],row[2],row[4]);
 320
 321                 c = rad_malloc(sizeof(*c));
 322                 memset(c, 0, sizeof(*c));
 323
 324 #ifdef WITH_DYNAMIC_CLIENTS
 325                 c->dynamic = 1;
 326 #endif
 327
 328                 /*
 329                  *      Look for prefixes
 330                  */
 331                 c->prefix = -1;
 332                 prefix_ptr = strchr(row[1], '/');
 333                 if (prefix_ptr) {
 334                         c->prefix = atoi(prefix_ptr + 1);
 335                         if ((c->prefix < 0) || (c->prefix > 128)) {
 336                                 radlog(L_ERR, "rlm_sql (%s): Invalid Prefix value '%s' for IP.",
 337                                        inst->config->xlat_name, prefix_ptr + 1);
 338                                 free(c);
 339                                 continue;
 340                         }
 341                         /* Replace '/' with '\0' */
 342                         *prefix_ptr = '\0';
 343                 }
 344
 345                 /*
 346                  *      Always get the numeric representation of IP
 347                  */
 348                 if (ip_hton(row[1], AF_UNSPEC, &c->ipaddr) < 0) {
 349                         radlog(L_CONS|L_ERR, "rlm_sql (%s): Failed to look up hostname %s: %s",
 350                                inst->config->xlat_name,
 351                                row[1], fr_strerror());
 352                         free(c);
 353                         continue;
 354                 } else {
 355                         char buffer[256];
 356                         ip_ntoh(&c->ipaddr, buffer, sizeof(buffer));
 357                         c->longname = strdup(buffer);
 358                 }
 359
 360                 if (c->prefix < 0) switch (c->ipaddr.af) {
 361                 case AF_INET:
 362                         c->prefix = 32;
 363                         break;
 364                 case AF_INET6:
 365                         c->prefix = 128;
 366                         break;
 367                 default:
 368                         break;
 369                 }
 370
 371                 /*
 372                  *      Other values (secret, shortname, nastype, virtual_server)
 373                  */
 374                 c->secret = strdup(row[4]);
 375                 c->shortname = strdup(row[2]);
 376                 if(row[3] != NULL)
 377                         c->nastype = strdup(row[3]);
 378
 379                 numf = (inst->module->sql_num_fields)(sqlsocket, inst->config);
 380                 if ((numf > 5) && (row[5] != NULL) && *row[5]) c->server = strdup(row[5]);
 381
 382                 DEBUG("rlm_sql (%s): Adding client %s (%s, server=%s) to clients list",
 383                       inst->config->xlat_name,
 384                       c->longname,c->shortname, c->server ? c->server : "<none>");
 385                 if (!client_add(NULL, c)) {
 386                         sql_release_socket(inst, sqlsocket);
 387                         DEBUG("rlm_sql (%s): Failed to add client %s (%s) to clients list.  Maybe there's a duplicate?",
 388                               inst->config->xlat_name,
 389                               c->longname,c->shortname);
 390                         client_free(c);
 391                         return -1;
 392                 }
 393         }
 394         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 395         sql_release_socket(inst, sqlsocket);
 396
 397         return 0;
 398 }
 399
 400
 401 /*
 402  *      Translate the SQL queries.
 403  */
 404 static size_t sql_escape_func(UNUSED REQUEST *request, char *out, size_t outlen, const char *in, void *arg)
 405 {
 406         SQL_INST *inst = arg;
 407         size_t len = 0;
 408
 409         while (in[0]) {
 410                 /*
 411                  *      Non-printable characters get replaced with their
 412                  *      mime-encoded equivalents.
 413                  */
 414                 if ((in[0] < 32) ||
 415                     strchr(inst->config->allowed_chars, *in) == NULL) {
 416                         /*
 417                          *      Only 3 or less bytes available.
 418                          */
 419                         if (outlen <= 3) {
 420                                 break;
 421                         }
 422
 423                         snprintf(out, outlen, "=%02X", (unsigned char) in[0]);
 424                         in++;
 425                         out += 3;
 426                         outlen -= 3;
 427                         len += 3;
 428                         continue;
 429                 }
 430
 431                 /*
 432                  *      Only one byte left.
 433                  */
 434                 if (outlen <= 1) {
 435                         break;
 436                 }
 437
 438                 /*
 439                  *      Allowed character.
 440                  */
 441                 *out = *in;
 442                 out++;
 443                 in++;
 444                 outlen--;
 445                 len++;
 446         }
 447         *out = '\0';
 448         return len;
 449 }
 450
 451 /*
 452  *      Set the SQL user name.
 453  *
 454  *      We don't call the escape function here. The resulting string
 455  *      will be escaped later in the queries xlat so we don't need to
 456  *      escape it twice. (it will make things wrong if we have an
 457  *      escape candidate character in the username)
 458  */
 459 int sql_set_user(SQL_INST *inst, REQUEST *request, char *sqlusername, const char *username)
 460 {
 461         VALUE_PAIR *vp=NULL;
 462         char tmpuser[MAX_STRING_LEN];
 463
 464         tmpuser[0] = '\0';
 465         sqlusername[0]= '\0';
 466
 467         /* Remove any user attr we added previously */
 468         pairdelete(&request->packet->vps, PW_SQL_USER_NAME, 0, -1);
 469
 470         if (username != NULL) {
 471                 strlcpy(tmpuser, username, sizeof(tmpuser));
 472         } else if (strlen(inst->config->query_user)) {
 473                 radius_xlat(tmpuser, sizeof(tmpuser), inst->config->query_user, request, NULL, NULL);
 474         } else {
 475                 return 0;
 476         }
 477
 478         strlcpy(sqlusername, tmpuser, MAX_STRING_LEN);
 479         RDEBUG2("sql_set_user escaped user --> '%s'", sqlusername);
 480         vp = radius_pairmake(request, &request->packet->vps,
 481                              "SQL-User-Name", NULL, 0);
 482         if (!vp) {
 483                 radlog(L_ERR, "%s", fr_strerror());
 484                 return -1;
 485         }
 486
 487         strlcpy(vp->vp_strvalue, tmpuser, sizeof(vp->vp_strvalue));
 488         vp->length = strlen(vp->vp_strvalue);
 489
 490         return 0;
 491
 492 }
 493
 494
 495 static void sql_grouplist_free (SQL_GROUPLIST **group_list)
 496 {
 497         SQL_GROUPLIST *last;
 498
 499         while(*group_list) {
 500                 last = *group_list;
 501                 *group_list = (*group_list)->next;
 502                 free(last);
 503         }
 504 }
 505
 506
 507 static int sql_get_grouplist (SQL_INST *inst, SQLSOCK *sqlsocket, REQUEST *request, SQL_GROUPLIST **group_list)
 508 {
 509         char    querystr[MAX_QUERY_LEN];
 510         int     num_groups = 0;
 511         SQL_ROW row;
 512         SQL_GROUPLIST   *group_list_tmp;
 513
 514         /* NOTE: sql_set_user should have been run before calling this function */
 515
 516         group_list_tmp = *group_list = NULL;
 517
 518         if (!inst->config->groupmemb_query ||
 519             (inst->config->groupmemb_query[0] == 0))
 520                 return 0;
 521
 522         if (!radius_xlat(querystr, sizeof(querystr), inst->config->groupmemb_query, request, sql_escape_func, inst)) {
 523                 radlog_request(L_ERR, 0, request, "xlat \"%s\" failed.",
 524                                inst->config->groupmemb_query);
 525                 return -1;
 526         }
 527
 528         if (rlm_sql_select_query(&sqlsocket, inst, querystr) < 0) {
 529                 return -1;
 530         }
 531         while (rlm_sql_fetch_row(&sqlsocket, inst) == 0) {
 532                 row = sqlsocket->row;
 533                 if (row == NULL)
 534                         break;
 535                 if (row[0] == NULL){
 536                         RDEBUG("row[0] returned NULL");
 537                         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 538                         sql_grouplist_free(group_list);
 539                         return -1;
 540                 }
 541                 if (*group_list == NULL) {
 542                         *group_list = rad_malloc(sizeof(SQL_GROUPLIST));
 543                         group_list_tmp = *group_list;
 544                 } else {
 545                         rad_assert(group_list_tmp != NULL);
 546                         group_list_tmp->next = rad_malloc(sizeof(SQL_GROUPLIST));
 547                         group_list_tmp = group_list_tmp->next;
 548                 }
 549                 group_list_tmp->next = NULL;
 550                 strlcpy(group_list_tmp->groupname, row[0], MAX_STRING_LEN);
 551         }
 552
 553         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 554
 555         return num_groups;
 556 }
 557
 558
 559 /*
 560  * sql groupcmp function. That way we can do group comparisons (in the users file for example)
 561  * with the group memberships reciding in sql
 562  * The group membership query should only return one element which is the username. The returned
 563  * username will then be checked with the passed check string.
 564  */
 565
 566 static int sql_groupcmp(void *instance, REQUEST *request, VALUE_PAIR *request_vp, VALUE_PAIR *check,
 567                         VALUE_PAIR *check_pairs, VALUE_PAIR **reply_pairs)
 568 {
 569         SQLSOCK *sqlsocket;
 570         SQL_INST *inst = instance;
 571         char sqlusername[MAX_STRING_LEN];
 572         SQL_GROUPLIST *group_list, *group_list_tmp;
 573
 574         check_pairs = check_pairs;
 575         reply_pairs = reply_pairs;
 576         request_vp = request_vp;
 577
 578         RDEBUG("sql_groupcmp");
 579         if (!check || !check->vp_strvalue || !check->length){
 580                 RDEBUG("sql_groupcmp: Illegal group name");
 581                 return 1;
 582         }
 583         if (!request){
 584                 RDEBUG("sql_groupcmp: NULL request");
 585                 return 1;
 586         }
 587         /*
 588          * Set, escape, and check the user attr here
 589          */
 590         if (sql_set_user(inst, request, sqlusername, NULL) < 0)
 591                 return 1;
 592
 593         /*
 594          *      Get a socket for this lookup
 595          */
 596         sqlsocket = sql_get_socket(inst);
 597         if (sqlsocket == NULL) {
 598                 /* Remove the username we (maybe) added above */
 599                 pairdelete(&request->packet->vps, PW_SQL_USER_NAME, 0, -1);
 600                 return 1;
 601         }
 602
 603         /*
 604          *      Get the list of groups this user is a member of
 605          */
 606         if (sql_get_grouplist(inst, sqlsocket, request, &group_list) < 0) {
 607                 radlog_request(L_ERR, 0, request,
 608                                "Error getting group membership");
 609                 /* Remove the username we (maybe) added above */
 610                 pairdelete(&request->packet->vps, PW_SQL_USER_NAME, 0, -1);
 611                 sql_release_socket(inst, sqlsocket);
 612                 return 1;
 613         }
 614
 615         for (group_list_tmp = group_list; group_list_tmp != NULL; group_list_tmp = group_list_tmp->next) {
 616                 if (strcmp(group_list_tmp->groupname, check->vp_strvalue) == 0){
 617                         RDEBUG("sql_groupcmp finished: User is a member of group %s",
 618                                check->vp_strvalue);
 619                         /* Free the grouplist */
 620                         sql_grouplist_free(&group_list);
 621                         /* Remove the username we (maybe) added above */
 622                         pairdelete(&request->packet->vps, PW_SQL_USER_NAME, 0, -1);
 623                         sql_release_socket(inst, sqlsocket);
 624                         return 0;
 625                 }
 626         }
 627
 628         /* Free the grouplist */
 629         sql_grouplist_free(&group_list);
 630         /* Remove the username we (maybe) added above */
 631         pairdelete(&request->packet->vps, PW_SQL_USER_NAME, 0, -1);
 632         sql_release_socket(inst,sqlsocket);
 633
 634         RDEBUG("sql_groupcmp finished: User is NOT a member of group %s",
 635                check->vp_strvalue);
 636
 637         return 1;
 638 }
 639
 640
 641
 642 static int rlm_sql_process_groups(SQL_INST *inst, REQUEST *request, SQLSOCK *sqlsocket, int *dofallthrough)
 643 {
 644         VALUE_PAIR *check_tmp = NULL;
 645         VALUE_PAIR *reply_tmp = NULL;
 646         SQL_GROUPLIST *group_list, *group_list_tmp;
 647         VALUE_PAIR *sql_group = NULL;
 648         char    querystr[MAX_QUERY_LEN];
 649         int found = 0;
 650         int rows;
 651
 652         /*
 653          *      Get the list of groups this user is a member of
 654          */
 655         if (sql_get_grouplist(inst, sqlsocket, request, &group_list) < 0) {
 656                 radlog_request(L_ERR, 0, request, "Error retrieving group list");
 657                 return -1;
 658         }
 659
 660         for (group_list_tmp = group_list; group_list_tmp != NULL && *dofallthrough != 0; group_list_tmp = group_list_tmp->next) {
 661                 /*
 662                  *      Add the Sql-Group attribute to the request list so we know
 663                  *      which group we're retrieving attributes for
 664                  */
 665                 sql_group = pairmake("Sql-Group", group_list_tmp->groupname, T_OP_EQ);
 666                 if (!sql_group) {
 667                         radlog_request(L_ERR, 0, request,
 668                                        "Error creating Sql-Group attribute");
 669                         sql_grouplist_free(&group_list);
 670                         return -1;
 671                 }
 672                 pairadd(&request->packet->vps, sql_group);
 673                 if (!radius_xlat(querystr, sizeof(querystr), inst->config->authorize_group_check_query, request, sql_escape_func, inst)) {
 674                         radlog_request(L_ERR, 0, request,
 675                                        "Error generating query; rejecting user");
 676                         /* Remove the grouup we added above */
 677                         pairdelete(&request->packet->vps, PW_SQL_GROUP, 0, -1);
 678                         sql_grouplist_free(&group_list);
 679                         return -1;
 680                 }
 681                 rows = sql_getvpdata(inst, &sqlsocket, &check_tmp, querystr);
 682                 if (rows < 0) {
 683                         radlog_request(L_ERR, 0, request, "Error retrieving check pairs for group %s",
 684                                group_list_tmp->groupname);
 685                         /* Remove the grouup we added above */
 686                         pairdelete(&request->packet->vps, PW_SQL_GROUP, 0, -1);
 687                         pairfree(&check_tmp);
 688                         sql_grouplist_free(&group_list);
 689                         return -1;
 690                 } else if (rows > 0) {
 691                         /*
 692                          *      Only do this if *some* check pairs were returned
 693                          */
 694                         if (paircompare(request, request->packet->vps, check_tmp, &request->reply->vps) == 0) {
 695                                 found = 1;
 696                                 RDEBUG2("User found in group %s",
 697                                         group_list_tmp->groupname);
 698                                 /*
 699                                  *      Now get the reply pairs since the paircompare matched
 700                                  */
 701                                 if (!radius_xlat(querystr, sizeof(querystr), inst->config->authorize_group_reply_query, request, sql_escape_func, inst)) {
 702                                         radlog_request(L_ERR, 0, request, "Error generating query; rejecting user");
 703                                         /* Remove the grouup we added above */
 704                                         pairdelete(&request->packet->vps, PW_SQL_GROUP, 0, -1);
 705                                         pairfree(&check_tmp);
 706                                         sql_grouplist_free(&group_list);
 707                                         return -1;
 708                                 }
 709                                 if (sql_getvpdata(inst, &sqlsocket, &reply_tmp, querystr) < 0) {
 710                                         radlog_request(L_ERR, 0, request, "Error retrieving reply pairs for group %s",
 711                                                group_list_tmp->groupname);
 712                                         /* Remove the grouup we added above */
 713                                         pairdelete(&request->packet->vps, PW_SQL_GROUP, 0, -1);
 714                                         pairfree(&check_tmp);
 715                                         pairfree(&reply_tmp);
 716                                         sql_grouplist_free(&group_list);
 717                                         return -1;
 718                                 }
 719                                 *dofallthrough = fallthrough(reply_tmp);
 720                                 pairxlatmove(request, &request->reply->vps, &reply_tmp);
 721                                 pairxlatmove(request, &request->config_items, &check_tmp);
 722                         }
 723                 } else {
 724                         /*
 725                          *      rows == 0.  This is like having the username on a line
 726                          *      in the user's file with no check vp's.  As such, we treat
 727                          *      it as found and add the reply attributes, so that we
 728                          *      match expected behavior
 729                          */
 730                         found = 1;
 731                         RDEBUG2("User found in group %s",
 732                                 group_list_tmp->groupname);
 733                         /*
 734                          *      Now get the reply pairs since the paircompare matched
 735                          */
 736                         if (!radius_xlat(querystr, sizeof(querystr), inst->config->authorize_group_reply_query, request, sql_escape_func, inst)) {
 737                                 radlog_request(L_ERR, 0, request, "Error generating query; rejecting user");
 738                                 /* Remove the grouup we added above */
 739                                 pairdelete(&request->packet->vps, PW_SQL_GROUP, 0, -1);
 740                                 pairfree(&check_tmp);
 741                                 sql_grouplist_free(&group_list);
 742                                 return -1;
 743                         }
 744                         if (sql_getvpdata(inst, &sqlsocket, &reply_tmp, querystr) < 0) {
 745                                 radlog_request(L_ERR, 0, request, "Error retrieving reply pairs for group %s",
 746                                        group_list_tmp->groupname);
 747                                 /* Remove the grouup we added above */
 748                                 pairdelete(&request->packet->vps, PW_SQL_GROUP, 0, -1);
 749                                 pairfree(&check_tmp);
 750                                 pairfree(&reply_tmp);
 751                                 sql_grouplist_free(&group_list);
 752                                 return -1;
 753                         }
 754                         *dofallthrough = fallthrough(reply_tmp);
 755                         pairxlatmove(request, &request->reply->vps, &reply_tmp);
 756                         pairxlatmove(request, &request->config_items, &check_tmp);
 757                 }
 758
 759                 /*
 760                  * Delete the Sql-Group we added above
 761                  * And clear out the pairlists
 762                  */
 763                 pairdelete(&request->packet->vps, PW_SQL_GROUP, 0, -1);
 764                 pairfree(&check_tmp);
 765                 pairfree(&reply_tmp);
 766         }
 767
 768         sql_grouplist_free(&group_list);
 769         return found;
 770 }
 771
 772
 773 static int rlm_sql_detach(void *instance)
 774 {
 775         SQL_INST *inst = instance;
 776
 777         paircompare_unregister(PW_SQL_GROUP, sql_groupcmp);
 778
 779         if (inst->config) {
 780                 int i;
 781
 782                 if (inst->pool) sql_poolfree(inst);
 783
 784                 if (inst->config->xlat_name) {
 785                         xlat_unregister(inst->config->xlat_name, sql_xlat, instance);
 786                         free(inst->config->xlat_name);
 787                 }
 788
 789                 /*
 790                  *      Free up dynamically allocated string pointers.
 791                  */
 792                 for (i = 0; module_config[i].name != NULL; i++) {
 793                         char **p;
 794                         if (module_config[i].type != PW_TYPE_STRING_PTR) {
 795                                 continue;
 796                         }
 797
 798                         /*
 799                          *      Treat 'config' as an opaque array of bytes,
 800                          *      and take the offset into it.  There's a
 801                          *      (char*) pointer at that offset, and we want
 802                          *      to point to it.
 803                          */
 804                         p = (char **) (((char *)inst->config) + module_config[i].offset);
 805                         if (!*p) { /* nothing allocated */
 806                                 continue;
 807                         }
 808                         free(*p);
 809                         *p = NULL;
 810                 }
 811                 free(inst->config);
 812                 inst->config = NULL;
 813         }
 814
 815         if (inst->handle) {
 816 #if 0
 817                 /*
 818                  *      FIXME: Call the modules 'destroy' function?
 819                  */
 820                 lt_dlclose(inst->handle);       /* ignore any errors */
 821 #endif
 822         }
 823         free(inst);
 824
 825         return 0;
 826 }
 827
 828 static int parse_sub_section(CONF_SECTION *parent,
 829                              UNUSED SQL_INST *instance,
 830                              rlm_sql_config_section_t *config,
 831                              rlm_components_t comp)
 832 {
 833         CONF_SECTION *cs;
 834
 835         const char *name = section_type_value[comp].section;
 836
 837         cs = cf_section_sub_find(parent, name);
 838         if (!cs) {
 839                 radlog(L_INFO, "Couldn't find configuration for %s. Will return NOOP for calls from this section.", name);
 840
 841                  return 1;
 842         }
 843
 844         if (cf_section_parse(cs, config, section_config) < 0) {
 845                 radlog(L_ERR, "Failed parsing configuration for section %s",
 846                        name);
 847
 848                 return -1;
 849         }
 850
 851         config->cs = cs;
 852
 853         return 1;
 854 }
 855
 856 static int rlm_sql_instantiate(CONF_SECTION * conf, void **instance)
 857 {
 858         SQL_INST *inst;
 859         const char *xlat_name;
 860
 861         inst = rad_malloc(sizeof(SQL_INST));
 862         memset(inst, 0, sizeof(SQL_INST));
 863
 864         /*
 865          *      Export these methods, too.  This avoids RTDL_GLOBAL.
 866          */
 867         inst->sql_set_user              = sql_set_user;
 868         inst->sql_get_socket            = sql_get_socket;
 869         inst->sql_release_socket        = sql_release_socket;
 870         inst->sql_escape_func           = sql_escape_func;
 871         inst->sql_query                 = rlm_sql_query;
 872         inst->sql_select_query          = rlm_sql_select_query;
 873         inst->sql_fetch_row             = rlm_sql_fetch_row;
 874
 875         inst->config = rad_malloc(sizeof(SQL_CONFIG));
 876         memset(inst->config, 0, sizeof(SQL_CONFIG));
 877         inst->cs = conf;
 878
 879         /*
 880          *      If the configuration parameters can't be parsed, then fail.
 881          */
 882         if ((cf_section_parse(conf, inst->config, module_config) < 0) ||
 883             (parse_sub_section(conf, inst,
 884                                &inst->config->accounting,
 885                                RLM_COMPONENT_ACCT) < 0) ||
 886             (parse_sub_section(conf, inst,
 887                                &inst->config->postauth,
 888                                RLM_COMPONENT_POST_AUTH) < 0)) {
 889                 radlog(L_ERR, "Failed parsing configuration");
 890                 goto error;
 891         }
 892
 893         xlat_name = cf_section_name2(conf);
 894         if (xlat_name == NULL) {
 895                 xlat_name = cf_section_name1(conf);
 896         } else {
 897                 char *group_name;
 898                 DICT_ATTR *dattr;
 899                 ATTR_FLAGS flags;
 900
 901                 /*
 902                  *      Allocate room for <instance>-SQL-Group
 903                  */
 904                 group_name = rad_malloc((strlen(xlat_name) + 1 + 11) * sizeof(char));
 905                 sprintf(group_name,"%s-SQL-Group", xlat_name);
 906                 DEBUG("rlm_sql Creating new attribute %s",group_name);
 907
 908                 memset(&flags, 0, sizeof(flags));
 909                 dict_addattr(group_name, 0, PW_TYPE_STRING, -1, flags);
 910                 dattr = dict_attrbyname(group_name);
 911                 if (dattr == NULL){
 912                         radlog(L_ERR, "rlm_sql: Failed to create attribute %s",
 913                                group_name);
 914
 915                         free(group_name);
 916
 917                         goto error;
 918                 }
 919
 920                 if (inst->config->groupmemb_query &&
 921                     inst->config->groupmemb_query[0]) {
 922                         DEBUG("rlm_sql: Registering sql_groupcmp for %s",
 923                               group_name);
 924                         paircompare_register(dattr->attr, PW_USER_NAME,
 925                                              sql_groupcmp, inst);
 926                 }
 927
 928                 free(group_name);
 929         }
 930
 931         rad_assert(xlat_name);
 932
 933         /*
 934          *      Register the SQL xlat function
 935          */
 936         inst->config->xlat_name = strdup(xlat_name);
 937         xlat_register(xlat_name, sql_xlat, inst);
 938
 939         /*
 940          *      Sanity check for crazy people.
 941          */
 942         if (strncmp(inst->config->sql_driver, "rlm_sql_", 8) != 0) {
 943                 radlog(L_ERR, "\"%s\" is NOT an SQL driver!",
 944                        inst->config->sql_driver);
 945                 goto error;
 946         }
 947
 948         /*
 949          *      Load the appropriate driver for our database
 950          */
 951         inst->handle = lt_dlopenext(inst->config->sql_driver);
 952         if (inst->handle == NULL) {
 953                 radlog(L_ERR, "Could not link driver %s: %s",
 954                        inst->config->sql_driver,
 955                        lt_dlerror());
 956                 radlog(L_ERR, "Make sure it (and all its dependent libraries!)"
 957                        "are in the search path of your system's ld.");
 958
 959                 goto error;
 960         }
 961
 962         inst->module = (rlm_sql_module_t *) lt_dlsym(inst->handle,
 963                                                      inst->config->sql_driver);
 964         if (!inst->module) {
 965                 radlog(L_ERR, "Could not link symbol %s: %s",
 966                        inst->config->sql_driver,
 967                        lt_dlerror());
 968
 969                 goto error;
 970         }
 971
 972         radlog(L_INFO, "rlm_sql (%s): Driver %s (module %s) loaded and linked",
 973                inst->config->xlat_name, inst->config->sql_driver,
 974                inst->module->name);
 975
 976         /*
 977          *      Initialise the connection pool for this instance
 978          */
 979         radlog(L_INFO, "rlm_sql (%s): Attempting to connect to %s@%s:%s/%s",
 980                inst->config->xlat_name, inst->config->sql_login,
 981                inst->config->sql_server, inst->config->sql_port,
 982                inst->config->sql_db);
 983
 984         if (sql_init_socketpool(inst) < 0)
 985                 goto error;
 986
 987         if (inst->config->groupmemb_query &&
 988             inst->config->groupmemb_query[0]) {
 989                 paircompare_register(PW_SQL_GROUP, PW_USER_NAME, sql_groupcmp, inst);
 990         }
 991
 992         if (inst->config->do_clients) {
 993                 if (generate_sql_clients(inst) == -1){
 994                         radlog(L_ERR, "Failed to load clients from SQL.");
 995
 996                         goto error;
 997                 }
 998         }
 999
1000         *instance = inst;
1001
1002         return RLM_MODULE_OK;
1003
1004         error:
1005         rlm_sql_detach(inst);
1006
1007         return -1;
1008 }
1009
1010
1011 static int rlm_sql_authorize(void *instance, REQUEST * request)
1012 {
1013         int ret = RLM_MODULE_NOTFOUND;
1014
1015         SQL_INST *inst = instance;
1016         SQLSOCK  *sqlsocket;
1017
1018         VALUE_PAIR *check_tmp = NULL;
1019         VALUE_PAIR *reply_tmp = NULL;
1020         VALUE_PAIR *user_profile = NULL;
1021
1022         int     dofallthrough = 1;
1023         int     rows;
1024
1025         char    querystr[MAX_QUERY_LEN];
1026         char    sqlusername[MAX_STRING_LEN];
1027
1028         /*
1029          * the profile username is used as the sqlusername during
1030          * profile checking so that we don't overwrite the orignal
1031          * sqlusername string
1032          */
1033         char   profileusername[MAX_STRING_LEN];
1034
1035         /*
1036          * Set, escape, and check the user attr here
1037          */
1038         if (sql_set_user(inst, request, sqlusername, NULL) < 0)
1039                 return RLM_MODULE_FAIL;
1040
1041         /*
1042          *  Reserve a socket
1043          *
1044          *  After this point use goto error or goto release to cleanup sockets
1045          *  temporary pairlists and temporary attributes.
1046          */
1047         sqlsocket = sql_get_socket(inst);
1048         if (sqlsocket == NULL)
1049                 goto error;
1050
1051         /*
1052          *  Query the check table to find any conditions associated with
1053          *  this user/realm/whatever...
1054          */
1055         if (inst->config->authorize_check_query &&
1056             *inst->config->authorize_check_query) {
1057                 if (!radius_xlat(querystr, sizeof(querystr), inst->config->authorize_check_query, request, sql_escape_func, inst)) {
1058                         radlog_request(L_ERR, 0, request, "Error generating query; rejecting user");
1059
1060                         goto error;
1061                 }
1062
1063                 rows = sql_getvpdata(inst, &sqlsocket, &check_tmp, querystr);
1064                 if (rows < 0) {
1065                         radlog_request(L_ERR, 0, request, "SQL query error; rejecting user");
1066
1067                         goto error;
1068                 }
1069
1070                 /*
1071                  *  Only do this if *some* check pairs were returned
1072                  */
1073                 if ((rows > 0) &&
1074                     (paircompare(request, request->packet->vps, check_tmp, &request->reply->vps) == 0)) {
1075                         RDEBUG2("User found in radcheck table");
1076
1077                         pairxlatmove(request, &request->config_items, &check_tmp);
1078
1079                         ret = RLM_MODULE_OK;
1080                 }
1081
1082                 /*
1083                  *  We only process reply table items if check conditions
1084                  *  were verified
1085                  */
1086                 else
1087                         goto skipreply;
1088         }
1089
1090         if (inst->config->authorize_reply_query &&
1091             *inst->config->authorize_reply_query) {
1092                 /*
1093                  *  Now get the reply pairs since the paircompare matched
1094                  */
1095                 if (!radius_xlat(querystr, sizeof(querystr), inst->config->authorize_reply_query, request, sql_escape_func, inst)) {
1096                         radlog_request(L_ERR, 0, request, "Error generating query; rejecting user");
1097
1098                         goto error;
1099                 }
1100
1101                 rows = sql_getvpdata(inst, &sqlsocket, &reply_tmp, querystr);
1102                 if (rows < 0) {
1103                         radlog_request(L_ERR, 0, request, "SQL query error; rejecting user");
1104
1105                         goto error;
1106                 }
1107
1108                 if (rows > 0) {
1109                         if (!inst->config->read_groups)
1110                                 dofallthrough = fallthrough(reply_tmp);
1111
1112                         pairxlatmove(request, &request->reply->vps, &reply_tmp);
1113
1114                         ret = RLM_MODULE_OK;
1115                 }
1116         }
1117
1118         skipreply:
1119
1120         /*
1121          *  Clear out the pairlists
1122          */
1123         pairfree(&check_tmp);
1124         pairfree(&reply_tmp);
1125
1126         /*
1127          *  dofallthrough is set to 1 by default so that if the user information
1128          *  is not found, we will still process groups.  If the user information,
1129          *  however, *is* found, Fall-Through must be set in order to process
1130          *  the groups as well.
1131          */
1132         if (dofallthrough) {
1133                 rows = rlm_sql_process_groups(inst, request, sqlsocket, &dofallthrough);
1134                 if (rows < 0) {
1135                         radlog_request(L_ERR, 0, request, "Error processing groups; rejecting user");
1136
1137                         goto error;
1138                 }
1139
1140                 if (rows > 0)
1141                         ret = RLM_MODULE_OK;
1142         }
1143
1144         /*
1145          *  Repeat the above process with the default profile or User-Profile
1146          */
1147         if (dofallthrough) {
1148                 /*
1149                  *  Check for a default_profile or for a User-Profile.
1150                  */
1151                 user_profile = pairfind(request->config_items, PW_USER_PROFILE, 0);
1152
1153                 char *profile = user_profile ?
1154                                 user_profile->vp_strvalue :
1155                                 inst->config->default_profile;
1156
1157                 if (!profile || !*profile)
1158                         goto release;
1159
1160                 RDEBUG("Checking profile %s", profile);
1161
1162                 if (sql_set_user(inst, request, profileusername, profile) < 0) {
1163                         radlog_request(L_ERR, 0, request, "Error setting profile; rejecting user");
1164
1165                         goto error;
1166                 }
1167
1168                 rows = rlm_sql_process_groups(inst, request, sqlsocket, &dofallthrough);
1169                 if (rows < 0) {
1170                         radlog_request(L_ERR, 0, request, "Error processing profile groups; rejecting user");
1171
1172                         goto error;
1173                 }
1174
1175                 if (rows > 0)
1176                         ret = RLM_MODULE_OK;
1177         }
1178
1179         goto release;
1180
1181         error:
1182         ret = RLM_MODULE_FAIL;
1183
1184         release:
1185         sql_release_socket(inst, sqlsocket);
1186
1187         /* Remove the username we (maybe) added above */
1188         pairdelete(&request->packet->vps, PW_SQL_USER_NAME, 0, -1);
1189
1190         pairfree(&check_tmp);
1191         pairfree(&reply_tmp);
1192
1193         return ret;
1194 }
1195
1196 /*
1197  *      Generic function for failing between a bunch of queries.
1198  *
1199  *      Uses the same principle as rlm_linelog, expanding the 'reference' config
1200  *      item using xlat to figure out what query it should execute.
1201  *
1202  *      If the reference matches multiple config items, and a query fails or
1203  *      doesn't update any rows, the next matching config item is used.
1204  *
1205  */
1206 static int rlm_sql_redundant(SQL_INST *inst, REQUEST *request,
1207                              rlm_sql_config_section_t *section)
1208 {
1209         int     ret = RLM_MODULE_OK;
1210
1211         SQLSOCK *sqlsocket = NULL;
1212         int     sql_ret;
1213         int     numaffected = 0;
1214
1215         CONF_ITEM  *item;
1216         CONF_PAIR  *pair;
1217         const char *attr = NULL;
1218         const char *value;
1219
1220         char    path[MAX_STRING_LEN];
1221         char    querystr[MAX_QUERY_LEN];
1222         char    sqlusername[MAX_STRING_LEN];
1223
1224         char    *p = path;
1225
1226         if (!section || !section->reference) {
1227                 RDEBUG("No configuration provided for this section");
1228
1229                 return RLM_MODULE_NOOP;
1230         }
1231
1232         if (section->reference[0] != '.')
1233                 *p++ = '.';
1234
1235         if (!radius_xlat(p, (sizeof(path) - (p - path)) - 1,
1236                         section->reference, request, NULL, NULL))
1237                 return RLM_MODULE_FAIL;
1238
1239         item = cf_reference_item(NULL, section->cs, path);
1240         if (!item)
1241                 return RLM_MODULE_FAIL;
1242
1243         if (cf_item_is_section(item)){
1244                 radlog(L_ERR, "Sections are not supported as references");
1245
1246                 return RLM_MODULE_FAIL;
1247         }
1248
1249         pair = cf_itemtopair(item);
1250         attr = cf_pair_attr(pair);
1251
1252         RDEBUG2("Using query template '%s'", attr);
1253
1254         sqlsocket = sql_get_socket(inst);
1255         if (sqlsocket == NULL)
1256                 return RLM_MODULE_FAIL;
1257
1258         sql_set_user(inst, request, sqlusername, NULL);
1259
1260         while (TRUE) {
1261                 value = cf_pair_value(pair);
1262                 if (!value) {
1263                         RDEBUG("Ignoring null query");
1264                         ret = RLM_MODULE_NOOP;
1265
1266                         goto release;
1267                 }
1268
1269                 radius_xlat(querystr, sizeof(querystr), value, request,
1270                             sql_escape_func, inst);
1271                 if (!*querystr) {
1272                         RDEBUG("Ignoring null query");
1273                         ret = RLM_MODULE_NOOP;
1274
1275                         goto release;
1276                 }
1277
1278                 rlm_sql_query_log(inst, request, section, querystr);
1279
1280                 /*
1281                  *  If rlm_sql_query cannot use the socket it'll try and
1282                  *  reconnect. Reconnecting will automatically release
1283                  *  the current socket, and try to select a new one.
1284                  *
1285                  *  If we get SQL_DOWN it means all connections in the pool
1286                  *  were exhausted, and we couldn't create a new connection,
1287                  *  so we do not need to call sql_release_socket.
1288                  */
1289                 sql_ret = rlm_sql_query(&sqlsocket, inst, querystr);
1290                 if (sql_ret == SQL_DOWN)
1291                         return RLM_MODULE_FAIL;
1292
1293                 rad_assert(sqlsocket);
1294
1295                 /*
1296                  *  Assume all other errors are incidental, and just meant our
1297                  *  operation failed and its not a client or SQL syntax error.
1298                  */
1299                 if (sql_ret == 0) {
1300                         numaffected = (inst->module->sql_affected_rows)
1301                                         (sqlsocket, inst->config);
1302                         if (numaffected > 0)
1303                                 break;
1304
1305                         RDEBUG("No records updated");
1306                 }
1307
1308                 (inst->module->sql_finish_query)(sqlsocket, inst->config);
1309
1310                 /*
1311                  *  We assume all entries with the same name form a redundant
1312                  *  set of queries.
1313                  */
1314                 pair = cf_pair_find_next(section->cs, pair, attr);
1315
1316                 if (!pair) {
1317                         RDEBUG("No additional queries configured");
1318
1319                         ret = RLM_MODULE_NOOP;
1320
1321                         goto release;
1322                 }
1323
1324                 RDEBUG("Trying next query...");
1325         }
1326
1327         (inst->module->sql_finish_query)(sqlsocket, inst->config);
1328
1329         release:
1330
1331         /* Remove the username we (maybe) added above */
1332         pairdelete(&request->packet->vps, PW_SQL_USER_NAME, 0, -1);
1333
1334         sql_release_socket(inst, sqlsocket);
1335
1336         return ret;
1337 }
1338
1339 #ifdef WITH_ACCOUNTING
1340
1341 /*
1342  *      Accounting: Insert or update session data in our sql table
1343  */
1344 static int rlm_sql_accounting(void *instance, REQUEST * request) {
1345         SQL_INST *inst = instance;
1346
1347         return rlm_sql_redundant(inst, request, &inst->config->accounting);
1348 }
1349
1350 #endif
1351
1352 #ifdef WITH_SESSION_MGMT
1353 /*
1354  *        See if a user is already logged in. Sets request->simul_count to the
1355  *        current session count for this user.
1356  *
1357  *        Check twice. If on the first pass the user exceeds his
1358  *        max. number of logins, do a second pass and validate all
1359  *        logins by querying the terminal server (using eg. SNMP).
1360  */
1361
1362 static int rlm_sql_checksimul(void *instance, REQUEST * request) {
1363         SQLSOCK         *sqlsocket;
1364         SQL_INST        *inst = instance;
1365         SQL_ROW         row;
1366         char            querystr[MAX_QUERY_LEN];
1367         char            sqlusername[MAX_STRING_LEN];
1368         int             check = 0;
1369         uint32_t        ipno = 0;
1370         char            *call_num = NULL;
1371         VALUE_PAIR      *vp;
1372         int             ret;
1373         uint32_t        nas_addr = 0;
1374         int             nas_port = 0;
1375
1376         /* If simul_count_query is not defined, we don't do any checking */
1377         if (!inst->config->simul_count_query ||
1378             (inst->config->simul_count_query[0] == 0)) {
1379                 return RLM_MODULE_NOOP;
1380         }
1381
1382         if((request->username == NULL) || (request->username->length == 0)) {
1383                 radlog_request(L_ERR, 0, request,
1384                                            "Zero Length username not permitted\n");
1385                 return RLM_MODULE_INVALID;
1386         }
1387
1388
1389         if(sql_set_user(inst, request, sqlusername, NULL) < 0)
1390                 return RLM_MODULE_FAIL;
1391
1392         radius_xlat(querystr, sizeof(querystr), inst->config->simul_count_query, request, sql_escape_func, inst);
1393
1394         /* initialize the sql socket */
1395         sqlsocket = sql_get_socket(inst);
1396         if(sqlsocket == NULL)
1397                 return RLM_MODULE_FAIL;
1398
1399         if(rlm_sql_select_query(&sqlsocket, inst, querystr)) {
1400                 sql_release_socket(inst, sqlsocket);
1401                 return RLM_MODULE_FAIL;
1402         }
1403
1404         ret = rlm_sql_fetch_row(&sqlsocket, inst);
1405         if (ret != 0) {
1406                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1407                 sql_release_socket(inst, sqlsocket);
1408                 return RLM_MODULE_FAIL;
1409         }
1410
1411         row = sqlsocket->row;
1412         if (row == NULL) {
1413                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1414                 sql_release_socket(inst, sqlsocket);
1415                 return RLM_MODULE_FAIL;
1416         }
1417
1418         request->simul_count = atoi(row[0]);
1419         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1420
1421         if(request->simul_count < request->simul_max) {
1422                 sql_release_socket(inst, sqlsocket);
1423                 return RLM_MODULE_OK;
1424         }
1425
1426         /*
1427          *      Looks like too many sessions, so let's start verifying
1428          *      them, unless told to rely on count query only.
1429          */
1430         if (!inst->config->simul_verify_query ||
1431             (inst->config->simul_verify_query[0] == '\0')) {
1432                 sql_release_socket(inst, sqlsocket);
1433                 return RLM_MODULE_OK;
1434         }
1435
1436         radius_xlat(querystr, sizeof(querystr), inst->config->simul_verify_query, request, sql_escape_func, inst);
1437         if(rlm_sql_select_query(&sqlsocket, inst, querystr)) {
1438                 sql_release_socket(inst, sqlsocket);
1439                 return RLM_MODULE_FAIL;
1440         }
1441
1442         /*
1443          *      Setup some stuff, like for MPP detection.
1444          */
1445         request->simul_count = 0;
1446
1447         if ((vp = pairfind(request->packet->vps, PW_FRAMED_IP_ADDRESS, 0)) != NULL)
1448                 ipno = vp->vp_ipaddr;
1449         if ((vp = pairfind(request->packet->vps, PW_CALLING_STATION_ID, 0)) != NULL)
1450                 call_num = vp->vp_strvalue;
1451
1452
1453         while (rlm_sql_fetch_row(&sqlsocket, inst) == 0) {
1454                 row = sqlsocket->row;
1455                 if (row == NULL)
1456                         break;
1457                 if (!row[2]){
1458                         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1459                         sql_release_socket(inst, sqlsocket);
1460                         RDEBUG("Cannot zap stale entry. No username present in entry.", inst->config->xlat_name);
1461                         return RLM_MODULE_FAIL;
1462                 }
1463                 if (!row[1]){
1464                         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1465                         sql_release_socket(inst, sqlsocket);
1466                         RDEBUG("Cannot zap stale entry. No session id in entry.", inst->config->xlat_name);
1467                         return RLM_MODULE_FAIL;
1468                 }
1469                 if (row[3])
1470                         nas_addr = inet_addr(row[3]);
1471                 if (row[4])
1472                         nas_port = atoi(row[4]);
1473
1474                 check = rad_check_ts(nas_addr, nas_port, row[2], row[1]);
1475
1476                 if (check == 0) {
1477                         /*
1478                          *      Stale record - zap it.
1479                          */
1480                         if (inst->config->deletestalesessions == TRUE) {
1481                                 uint32_t framed_addr = 0;
1482                                 char proto = 0;
1483                                 int sess_time = 0;
1484
1485                                 if (row[5])
1486                                         framed_addr = inet_addr(row[5]);
1487                                 if (row[7]){
1488                                         if (strcmp(row[7], "PPP") == 0)
1489                                                 proto = 'P';
1490                                         else if (strcmp(row[7], "SLIP") == 0)
1491                                                 proto = 'S';
1492                                 }
1493                                 if (row[8])
1494                                         sess_time = atoi(row[8]);
1495                                 session_zap(request, nas_addr, nas_port,
1496                                             row[2], row[1], framed_addr,
1497                                             proto, sess_time);
1498                         }
1499                 }
1500                 else if (check == 1) {
1501                         /*
1502                          *      User is still logged in.
1503                          */
1504                         ++request->simul_count;
1505
1506                         /*
1507                          *      Does it look like a MPP attempt?
1508                          */
1509                         if (row[5] && ipno && inet_addr(row[5]) == ipno)
1510                                 request->simul_mpp = 2;
1511                         else if (row[6] && call_num &&
1512                                 !strncmp(row[6],call_num,16))
1513                                 request->simul_mpp = 2;
1514                 }
1515                 else {
1516                         /*
1517                          *      Failed to check the terminal server for
1518                          *      duplicate logins: return an error.
1519                          */
1520                         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1521                         sql_release_socket(inst, sqlsocket);
1522                         radlog_request(L_ERR, 0, request, "Failed to check the terminal server for user '%s'.", row[2]);
1523                         return RLM_MODULE_FAIL;
1524                 }
1525         }
1526
1527         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1528         sql_release_socket(inst, sqlsocket);
1529
1530         /*
1531          *      The Auth module apparently looks at request->simul_count,
1532          *      not the return value of this module when deciding to deny
1533          *      a call for too many sessions.
1534          */
1535         return RLM_MODULE_OK;
1536 }
1537 #endif
1538
1539 /*
1540  *      Postauth: Write a record of the authentication attempt
1541  */
1542 static int rlm_sql_postauth(void *instance, REQUEST * request) {
1543         SQL_INST *inst = instance;
1544
1545         return rlm_sql_redundant(inst, request, &inst->config->postauth);
1546 }
1547
1548 /*
1549  *      Execute postauth_query after authentication
1550  */
1551
1552
1553 /* globally exported name */
1554 module_t rlm_sql = {
1555         RLM_MODULE_INIT,
1556         "SQL",
1557         RLM_TYPE_THREAD_SAFE,   /* type: reserved */
1558         rlm_sql_instantiate,    /* instantiation */
1559         rlm_sql_detach,         /* detach */
1560         {
1561                 NULL,                   /* authentication */
1562                 rlm_sql_authorize,      /* authorization */
1563                 NULL,                   /* preaccounting */
1564 #ifdef WITH_ACCOUNTING
1565                 rlm_sql_accounting,     /* accounting */
1566 #else
1567                 NULL,
1568 #endif
1569 #ifdef WITH_SESSION_MGMT
1570                 rlm_sql_checksimul,     /* checksimul */
1571 #else
1572                 NULL,
1573 #endif
1574                 NULL,                   /* pre-proxy */
1575                 NULL,                   /* post-proxy */
1576                 rlm_sql_postauth        /* post-auth */
1577         },
1578 };