src/modules/rlm_sql/rlm_sql.c

   1 /*
   2  * rlm_sql.c            SQL Module
   3  *              Main SQL module file. Most ICRADIUS code is located in sql.c
   4  *
   5  * Version:     $Id$
   6  *
   7  *   This program is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU General Public License as published by
   9  *   the Free Software Foundation; either version 2 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This program is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with this program; if not, write to the Free Software
  19  *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  *
  21  * Copyright 2000,2006  The FreeRADIUS server project
  22  * Copyright 2000  Mike Machado <mike@innercite.com>
  23  * Copyright 2000  Alan DeKok <aland@ox.org>
  24  */
  25
  26 #include <freeradius-devel/ident.h>
  27 RCSID("$Id$")
  28
  29 #include <freeradius-devel/radiusd.h>
  30 #include <freeradius-devel/modules.h>
  31 #include <freeradius-devel/rad_assert.h>
  32
  33 #include <sys/stat.h>
  34
  35 #include "rlm_sql.h"
  36
  37 static char *allowed_chars = NULL;
  38
  39 static const CONF_PARSER module_config[] = {
  40         {"driver",PW_TYPE_STRING_PTR,
  41          offsetof(SQL_CONFIG,sql_driver), NULL, "mysql"},
  42         {"server",PW_TYPE_STRING_PTR,
  43          offsetof(SQL_CONFIG,sql_server), NULL, "localhost"},
  44         {"port",PW_TYPE_STRING_PTR,
  45          offsetof(SQL_CONFIG,sql_port), NULL, ""},
  46         {"login", PW_TYPE_STRING_PTR,
  47          offsetof(SQL_CONFIG,sql_login), NULL, ""},
  48         {"password", PW_TYPE_STRING_PTR,
  49          offsetof(SQL_CONFIG,sql_password), NULL, ""},
  50         {"radius_db", PW_TYPE_STRING_PTR,
  51          offsetof(SQL_CONFIG,sql_db), NULL, "radius"},
  52         {"read_groups", PW_TYPE_BOOLEAN,
  53          offsetof(SQL_CONFIG,read_groups), NULL, "yes"},
  54         {"sqltrace", PW_TYPE_BOOLEAN,
  55          offsetof(SQL_CONFIG,sqltrace), NULL, "no"},
  56         {"sqltracefile", PW_TYPE_STRING_PTR,
  57          offsetof(SQL_CONFIG,tracefile), NULL, SQLTRACEFILE},
  58         {"readclients", PW_TYPE_BOOLEAN,
  59          offsetof(SQL_CONFIG,do_clients), NULL, "no"},
  60         {"deletestalesessions", PW_TYPE_BOOLEAN,
  61          offsetof(SQL_CONFIG,deletestalesessions), NULL, "yes"},
  62         {"num_sql_socks", PW_TYPE_INTEGER,
  63          offsetof(SQL_CONFIG,num_sql_socks), NULL, "5"},
  64         {"lifetime", PW_TYPE_INTEGER,
  65          offsetof(SQL_CONFIG,lifetime), NULL, "0"},
  66         {"max_queries", PW_TYPE_INTEGER,
  67          offsetof(SQL_CONFIG,max_queries), NULL, "0"},
  68         {"sql_user_name", PW_TYPE_STRING_PTR,
  69          offsetof(SQL_CONFIG,query_user), NULL, ""},
  70         {"default_user_profile", PW_TYPE_STRING_PTR,
  71          offsetof(SQL_CONFIG,default_profile), NULL, ""},
  72         {"nas_query", PW_TYPE_STRING_PTR,
  73          offsetof(SQL_CONFIG,nas_query), NULL, "SELECT id,nasname,shortname,type,secret FROM nas"},
  74         {"authorize_check_query", PW_TYPE_STRING_PTR,
  75          offsetof(SQL_CONFIG,authorize_check_query), NULL, ""},
  76         {"authorize_reply_query", PW_TYPE_STRING_PTR,
  77          offsetof(SQL_CONFIG,authorize_reply_query), NULL, NULL},
  78         {"authorize_group_check_query", PW_TYPE_STRING_PTR,
  79          offsetof(SQL_CONFIG,authorize_group_check_query), NULL, ""},
  80         {"authorize_group_reply_query", PW_TYPE_STRING_PTR,
  81          offsetof(SQL_CONFIG,authorize_group_reply_query), NULL, ""},
  82         {"accounting_onoff_query", PW_TYPE_STRING_PTR,
  83          offsetof(SQL_CONFIG,accounting_onoff_query), NULL, ""},
  84         {"accounting_update_query", PW_TYPE_STRING_PTR,
  85          offsetof(SQL_CONFIG,accounting_update_query), NULL, ""},
  86         {"accounting_update_query_alt", PW_TYPE_STRING_PTR,
  87          offsetof(SQL_CONFIG,accounting_update_query_alt), NULL, ""},
  88         {"accounting_start_query", PW_TYPE_STRING_PTR,
  89          offsetof(SQL_CONFIG,accounting_start_query), NULL, ""},
  90         {"accounting_start_query_alt", PW_TYPE_STRING_PTR,
  91          offsetof(SQL_CONFIG,accounting_start_query_alt), NULL, ""},
  92         {"accounting_stop_query", PW_TYPE_STRING_PTR,
  93          offsetof(SQL_CONFIG,accounting_stop_query), NULL, ""},
  94         {"accounting_stop_query_alt", PW_TYPE_STRING_PTR,
  95          offsetof(SQL_CONFIG,accounting_stop_query_alt), NULL, ""},
  96         {"group_membership_query", PW_TYPE_STRING_PTR,
  97          offsetof(SQL_CONFIG,groupmemb_query), NULL, NULL},
  98         {"connect_failure_retry_delay", PW_TYPE_INTEGER,
  99          offsetof(SQL_CONFIG,connect_failure_retry_delay), NULL, "60"},
 100         {"simul_count_query", PW_TYPE_STRING_PTR,
 101          offsetof(SQL_CONFIG,simul_count_query), NULL, ""},
 102         {"simul_verify_query", PW_TYPE_STRING_PTR,
 103          offsetof(SQL_CONFIG,simul_verify_query), NULL, ""},
 104         {"postauth_query", PW_TYPE_STRING_PTR,
 105          offsetof(SQL_CONFIG,postauth_query), NULL, ""},
 106         {"safe-characters", PW_TYPE_STRING_PTR,
 107          offsetof(SQL_CONFIG,allowed_chars), NULL,
 108         "@abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.-_: /"},
 109
 110         /*
 111          *      This only works for a few drivers.
 112          */
 113         {"query_timeout", PW_TYPE_INTEGER,
 114          offsetof(SQL_CONFIG,query_timeout), NULL, NULL},
 115
 116         {NULL, -1, 0, NULL, NULL}
 117 };
 118
 119 /*
 120  *      Fall-Through checking function from rlm_files.c
 121  */
 122 static int fallthrough(VALUE_PAIR *vp)
 123 {
 124         VALUE_PAIR *tmp;
 125         tmp = pairfind(vp, PW_FALL_THROUGH, 0);
 126
 127         return tmp ? tmp->vp_integer : 0;
 128 }
 129
 130
 131
 132 /*
 133  *      Yucky prototype.
 134  */
 135 static int generate_sql_clients(SQL_INST *inst);
 136 static size_t sql_escape_func(char *out, size_t outlen, const char *in);
 137
 138 /*
 139  *      sql xlat function. Right now only SELECTs are supported. Only
 140  *      the first element of the SELECT result will be used.
 141  *
 142  *      For other statements (insert, update, delete, etc.), the
 143  *      number of affected rows will be returned.
 144  */
 145 static int sql_xlat(void *instance, REQUEST *request,
 146                     char *fmt, char *out, size_t freespace,
 147                     UNUSED RADIUS_ESCAPE_STRING func)
 148 {
 149         SQLSOCK *sqlsocket;
 150         SQL_ROW row;
 151         SQL_INST *inst = instance;
 152         char querystr[MAX_QUERY_LEN];
 153         char sqlusername[MAX_STRING_LEN];
 154         size_t ret = 0;
 155
 156         RDEBUG("sql_xlat");
 157
 158         /*
 159          * Add SQL-User-Name attribute just in case it is needed
 160          *  We could search the string fmt for SQL-User-Name to see if this is
 161          *  needed or not
 162          */
 163         sql_set_user(inst, request, sqlusername, NULL);
 164         /*
 165          * Do an xlat on the provided string (nice recursive operation).
 166          */
 167         if (!radius_xlat(querystr, sizeof(querystr), fmt, request, sql_escape_func)) {
 168                 radlog(L_ERR, "rlm_sql (%s): xlat failed.",
 169                        inst->config->xlat_name);
 170                 return 0;
 171         }
 172
 173         query_log(request, inst,querystr);
 174         sqlsocket = sql_get_socket(inst);
 175         if (sqlsocket == NULL)
 176                 return 0;
 177
 178         /*
 179          *      If the query starts with any of the following prefixes,
 180          *      then return the number of rows affected
 181          */
 182         if ((strncasecmp(querystr, "insert", 6) == 0) ||
 183             (strncasecmp(querystr, "update", 6) == 0) ||
 184             (strncasecmp(querystr, "delete", 6) == 0)) {
 185                 int numaffected;
 186                 char buffer[21]; /* 64bit max is 20 decimal chars + null byte */
 187
 188                 if (rlm_sql_query(sqlsocket,inst,querystr)) {
 189                         radlog(L_ERR, "rlm_sql (%s): database query error, %s: %s",
 190                                 inst->config->xlat_name, querystr,
 191                                 (inst->module->sql_error)(sqlsocket,
 192                                                           inst->config));
 193                         sql_release_socket(inst,sqlsocket);
 194                         return 0;
 195                 }
 196
 197                 numaffected = (inst->module->sql_affected_rows)(sqlsocket,
 198                                                                 inst->config);
 199                 if (numaffected < 1) {
 200                         RDEBUG("rlm_sql (%s): SQL query affected no rows",
 201                                 inst->config->xlat_name);
 202                 }
 203
 204                 /*
 205                  *      Don't chop the returned number if freespace is
 206                  *      too small.  This hack is necessary because
 207                  *      some implementations of snprintf return the
 208                  *      size of the written data, and others return
 209                  *      the size of the data they *would* have written
 210                  *      if the output buffer was large enough.
 211                  */
 212                 snprintf(buffer, sizeof(buffer), "%d", numaffected);
 213                 ret = strlen(buffer);
 214                 if (ret >= freespace){
 215                         RDEBUG("rlm_sql (%s): Can't write result, insufficient string space",
 216                                inst->config->xlat_name);
 217                         (inst->module->sql_finish_query)(sqlsocket,
 218                                                          inst->config);
 219                         sql_release_socket(inst,sqlsocket);
 220                         return 0;
 221                 }
 222
 223                 memcpy(out, buffer, ret + 1); /* we did bounds checking above */
 224
 225                 (inst->module->sql_finish_query)(sqlsocket, inst->config);
 226                 sql_release_socket(inst,sqlsocket);
 227                 return ret;
 228         } /* else it's a SELECT statement */
 229
 230         if (rlm_sql_select_query(sqlsocket,inst,querystr)){
 231                 radlog(L_ERR, "rlm_sql (%s): database query error, %s: %s",
 232                        inst->config->xlat_name,querystr,
 233                        (inst->module->sql_error)(sqlsocket, inst->config));
 234                 sql_release_socket(inst,sqlsocket);
 235                 return 0;
 236         }
 237
 238         ret = rlm_sql_fetch_row(sqlsocket, inst);
 239
 240         if (ret) {
 241                 RDEBUG("SQL query did not succeed");
 242                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 243                 sql_release_socket(inst,sqlsocket);
 244                 return 0;
 245         }
 246
 247         row = sqlsocket->row;
 248         if (row == NULL) {
 249                 RDEBUG("SQL query did not return any results");
 250                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 251                 sql_release_socket(inst,sqlsocket);
 252                 return 0;
 253         }
 254
 255         if (row[0] == NULL){
 256                 RDEBUG("row[0] returned NULL");
 257                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 258                 sql_release_socket(inst,sqlsocket);
 259                 return 0;
 260         }
 261         ret = strlen(row[0]);
 262         if (ret >= freespace){
 263                 RDEBUG("Insufficient string space");
 264                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 265                 sql_release_socket(inst,sqlsocket);
 266                 return 0;
 267         }
 268
 269         strlcpy(out,row[0],freespace);
 270
 271         RDEBUG("sql_xlat finished");
 272
 273         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 274         sql_release_socket(inst,sqlsocket);
 275         return ret;
 276 }
 277
 278 static int generate_sql_clients(SQL_INST *inst)
 279 {
 280         SQLSOCK *sqlsocket;
 281         SQL_ROW row;
 282         char querystr[MAX_QUERY_LEN];
 283         RADCLIENT *c;
 284         char *prefix_ptr = NULL;
 285         unsigned int i = 0;
 286         int numf = 0;
 287
 288         DEBUG("rlm_sql (%s): Processing generate_sql_clients",
 289               inst->config->xlat_name);
 290
 291         /* NAS query isn't xlat'ed */
 292         strlcpy(querystr, inst->config->nas_query, sizeof(querystr));
 293         DEBUG("rlm_sql (%s) in generate_sql_clients: query is %s",
 294               inst->config->xlat_name, querystr);
 295
 296         sqlsocket = sql_get_socket(inst);
 297         if (sqlsocket == NULL)
 298                 return -1;
 299         if (rlm_sql_select_query(sqlsocket,inst,querystr)){
 300                 radlog(L_ERR, "rlm_sql (%s): database query error, %s: %s",
 301                        inst->config->xlat_name,querystr,
 302                        (inst->module->sql_error)(sqlsocket, inst->config));
 303                 sql_release_socket(inst,sqlsocket);
 304                 return -1;
 305         }
 306
 307         while(rlm_sql_fetch_row(sqlsocket, inst) == 0) {
 308                 i++;
 309                 row = sqlsocket->row;
 310                 if (row == NULL)
 311                         break;
 312         /*
 313          *  The return data for each row MUST be in the following order:
 314          *
 315          *  0. Row ID (currently unused)
 316          *  1. Name (or IP address)
 317          *  2. Shortname
 318          *  3. Type
 319          *  4. Secret
 320          *  5. Virtual Server (optional)
 321          */
 322                 if (!row[0]){
 323                         radlog(L_ERR, "rlm_sql (%s): No row id found on pass %d",inst->config->xlat_name,i);
 324                         continue;
 325                 }
 326                 if (!row[1]){
 327                         radlog(L_ERR, "rlm_sql (%s): No nasname found for row %s",inst->config->xlat_name,row[0]);
 328                         continue;
 329                 }
 330                 if (!row[2]){
 331                         radlog(L_ERR, "rlm_sql (%s): No short name found for row %s",inst->config->xlat_name,row[0]);
 332                         continue;
 333                 }
 334                 if (!row[4]){
 335                         radlog(L_ERR, "rlm_sql (%s): No secret found for row %s",inst->config->xlat_name,row[0]);
 336                         continue;
 337                 }
 338
 339                 DEBUG("rlm_sql (%s): Read entry nasname=%s,shortname=%s,secret=%s",inst->config->xlat_name,
 340                         row[1],row[2],row[4]);
 341
 342                 c = rad_malloc(sizeof(*c));
 343                 memset(c, 0, sizeof(*c));
 344
 345 #ifdef WITH_DYNAMIC_CLIENTS
 346                 c->dynamic = 1;
 347 #endif
 348
 349                 /*
 350                  *      Look for prefixes
 351                  */
 352                 c->prefix = -1;
 353                 prefix_ptr = strchr(row[1], '/');
 354                 if (prefix_ptr) {
 355                         c->prefix = atoi(prefix_ptr + 1);
 356                         if ((c->prefix < 0) || (c->prefix > 128)) {
 357                                 radlog(L_ERR, "rlm_sql (%s): Invalid Prefix value '%s' for IP.",
 358                                        inst->config->xlat_name, prefix_ptr + 1);
 359                                 free(c);
 360                                 continue;
 361                         }
 362                         /* Replace '/' with '\0' */
 363                         *prefix_ptr = '\0';
 364                 }
 365
 366                 /*
 367                  *      Always get the numeric representation of IP
 368                  */
 369                 if (ip_hton(row[1], AF_UNSPEC, &c->ipaddr) < 0) {
 370                         radlog(L_CONS|L_ERR, "rlm_sql (%s): Failed to look up hostname %s: %s",
 371                                inst->config->xlat_name,
 372                                row[1], fr_strerror());
 373                         free(c);
 374                         continue;
 375                 } else {
 376                         char buffer[256];
 377                         ip_ntoh(&c->ipaddr, buffer, sizeof(buffer));
 378                         c->longname = strdup(buffer);
 379                 }
 380
 381                 if (c->prefix < 0) switch (c->ipaddr.af) {
 382                 case AF_INET:
 383                         c->prefix = 32;
 384                         break;
 385                 case AF_INET6:
 386                         c->prefix = 128;
 387                         break;
 388                 default:
 389                         break;
 390                 }
 391
 392                 /*
 393                  *      Other values (secret, shortname, nastype, virtual_server)
 394                  */
 395                 c->secret = strdup(row[4]);
 396                 c->shortname = strdup(row[2]);
 397                 if(row[3] != NULL)
 398                         c->nastype = strdup(row[3]);
 399
 400                 numf = (inst->module->sql_num_fields)(sqlsocket, inst->config);
 401                 if ((numf > 5) && (row[5] != NULL) && *row[5]) c->server = strdup(row[5]);
 402
 403                 DEBUG("rlm_sql (%s): Adding client %s (%s, server=%s) to clients list",
 404                       inst->config->xlat_name,
 405                       c->longname,c->shortname, c->server ? c->server : "<none>");
 406                 if (!client_add(NULL, c)) {
 407                         sql_release_socket(inst, sqlsocket);
 408                         DEBUG("rlm_sql (%s): Failed to add client %s (%s) to clients list.  Maybe there's a duplicate?",
 409                               inst->config->xlat_name,
 410                               c->longname,c->shortname);
 411                         client_free(c);
 412                         return -1;
 413                 }
 414         }
 415         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 416         sql_release_socket(inst, sqlsocket);
 417
 418         return 0;
 419 }
 420
 421
 422 /*
 423  *      Translate the SQL queries.
 424  */
 425 static size_t sql_escape_func(char *out, size_t outlen, const char *in)
 426 {
 427         size_t len = 0;
 428
 429         while (in[0]) {
 430                 /*
 431                  *      Non-printable characters get replaced with their
 432                  *      mime-encoded equivalents.
 433                  */
 434                 if ((in[0] < 32) ||
 435                     strchr(allowed_chars, *in) == NULL) {
 436                         /*
 437                          *      Only 3 or less bytes available.
 438                          */
 439                         if (outlen <= 3) {
 440                                 break;
 441                         }
 442
 443                         snprintf(out, outlen, "=%02X", (unsigned char) in[0]);
 444                         in++;
 445                         out += 3;
 446                         outlen -= 3;
 447                         len += 3;
 448                         continue;
 449                 }
 450
 451                 /*
 452                  *      Only one byte left.
 453                  */
 454                 if (outlen <= 1) {
 455                         break;
 456                 }
 457
 458                 /*
 459                  *      Allowed character.
 460                  */
 461                 *out = *in;
 462                 out++;
 463                 in++;
 464                 outlen--;
 465                 len++;
 466         }
 467         *out = '\0';
 468         return len;
 469 }
 470
 471 /*
 472  *      Set the SQL user name.
 473  *
 474  *      We don't call the escape function here. The resulting string
 475  *      will be escaped later in the queries xlat so we don't need to
 476  *      escape it twice. (it will make things wrong if we have an
 477  *      escape candidate character in the username)
 478  */
 479 int sql_set_user(SQL_INST *inst, REQUEST *request, char *sqlusername, const char *username)
 480 {
 481         VALUE_PAIR *vp=NULL;
 482         char tmpuser[MAX_STRING_LEN];
 483
 484         tmpuser[0] = '\0';
 485         sqlusername[0]= '\0';
 486
 487         /* Remove any user attr we added previously */
 488         pairdelete(&request->packet->vps, PW_SQL_USER_NAME, 0);
 489
 490         if (username != NULL) {
 491                 strlcpy(tmpuser, username, sizeof(tmpuser));
 492         } else if (strlen(inst->config->query_user)) {
 493                 radius_xlat(tmpuser, sizeof(tmpuser), inst->config->query_user, request, NULL);
 494         } else {
 495                 return 0;
 496         }
 497
 498         strlcpy(sqlusername, tmpuser, MAX_STRING_LEN);
 499         RDEBUG2("sql_set_user escaped user --> '%s'", sqlusername);
 500         vp = radius_pairmake(request, &request->packet->vps,
 501                              "SQL-User-Name", NULL, 0);
 502         if (!vp) {
 503                 radlog(L_ERR, "%s", fr_strerror());
 504                 return -1;
 505         }
 506
 507         strlcpy(vp->vp_strvalue, tmpuser, sizeof(vp->vp_strvalue));
 508         vp->length = strlen(vp->vp_strvalue);
 509
 510         return 0;
 511
 512 }
 513
 514
 515 static void sql_grouplist_free (SQL_GROUPLIST **group_list)
 516 {
 517         SQL_GROUPLIST *last;
 518
 519         while(*group_list) {
 520                 last = *group_list;
 521                 *group_list = (*group_list)->next;
 522                 free(last);
 523         }
 524 }
 525
 526
 527 static int sql_get_grouplist (SQL_INST *inst, SQLSOCK *sqlsocket, REQUEST *request, SQL_GROUPLIST **group_list)
 528 {
 529         char    querystr[MAX_QUERY_LEN];
 530         int     num_groups = 0;
 531         SQL_ROW row;
 532         SQL_GROUPLIST   *group_list_tmp;
 533
 534         /* NOTE: sql_set_user should have been run before calling this function */
 535
 536         group_list_tmp = *group_list = NULL;
 537
 538         if (!inst->config->groupmemb_query ||
 539             (inst->config->groupmemb_query[0] == 0))
 540                 return 0;
 541
 542         if (!radius_xlat(querystr, sizeof(querystr), inst->config->groupmemb_query, request, sql_escape_func)) {
 543                 radlog_request(L_ERR, 0, request, "xlat \"%s\" failed.",
 544                                inst->config->groupmemb_query);
 545                 return -1;
 546         }
 547
 548         if (rlm_sql_select_query(sqlsocket, inst, querystr) < 0) {
 549                 radlog_request(L_ERR, 0, request,
 550                                "database query error, %s: %s",
 551                                querystr,
 552                        (inst->module->sql_error)(sqlsocket,inst->config));
 553                 return -1;
 554         }
 555         while (rlm_sql_fetch_row(sqlsocket, inst) == 0) {
 556                 row = sqlsocket->row;
 557                 if (row == NULL)
 558                         break;
 559                 if (row[0] == NULL){
 560                         RDEBUG("row[0] returned NULL");
 561                         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 562                         sql_grouplist_free(group_list);
 563                         return -1;
 564                 }
 565                 if (*group_list == NULL) {
 566                         *group_list = rad_malloc(sizeof(SQL_GROUPLIST));
 567                         group_list_tmp = *group_list;
 568                 } else {
 569                         rad_assert(group_list_tmp != NULL);
 570                         group_list_tmp->next = rad_malloc(sizeof(SQL_GROUPLIST));
 571                         group_list_tmp = group_list_tmp->next;
 572                 }
 573                 group_list_tmp->next = NULL;
 574                 strlcpy(group_list_tmp->groupname, row[0], MAX_STRING_LEN);
 575         }
 576
 577         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
 578
 579         return num_groups;
 580 }
 581
 582
 583 /*
 584  * sql groupcmp function. That way we can do group comparisons (in the users file for example)
 585  * with the group memberships reciding in sql
 586  * The group membership query should only return one element which is the username. The returned
 587  * username will then be checked with the passed check string.
 588  */
 589
 590 static int sql_groupcmp(void *instance, REQUEST *request, VALUE_PAIR *request_vp, VALUE_PAIR *check,
 591                         VALUE_PAIR *check_pairs, VALUE_PAIR **reply_pairs)
 592 {
 593         SQLSOCK *sqlsocket;
 594         SQL_INST *inst = instance;
 595         char sqlusername[MAX_STRING_LEN];
 596         SQL_GROUPLIST *group_list, *group_list_tmp;
 597
 598         check_pairs = check_pairs;
 599         reply_pairs = reply_pairs;
 600         request_vp = request_vp;
 601
 602         RDEBUG("sql_groupcmp");
 603         if (!check || !check->vp_strvalue || !check->length){
 604                 RDEBUG("sql_groupcmp: Illegal group name");
 605                 return 1;
 606         }
 607         if (!request){
 608                 RDEBUG("sql_groupcmp: NULL request");
 609                 return 1;
 610         }
 611         /*
 612          * Set, escape, and check the user attr here
 613          */
 614         if (sql_set_user(inst, request, sqlusername, NULL) < 0)
 615                 return 1;
 616
 617         /*
 618          *      Get a socket for this lookup
 619          */
 620         sqlsocket = sql_get_socket(inst);
 621         if (sqlsocket == NULL) {
 622                 /* Remove the username we (maybe) added above */
 623                 pairdelete(&request->packet->vps, PW_SQL_USER_NAME, 0);
 624                 return 1;
 625         }
 626
 627         /*
 628          *      Get the list of groups this user is a member of
 629          */
 630         if (sql_get_grouplist(inst, sqlsocket, request, &group_list) < 0) {
 631                 radlog_request(L_ERR, 0, request,
 632                                "Error getting group membership");
 633                 /* Remove the username we (maybe) added above */
 634                 pairdelete(&request->packet->vps, PW_SQL_USER_NAME, 0);
 635                 sql_release_socket(inst, sqlsocket);
 636                 return 1;
 637         }
 638
 639         for (group_list_tmp = group_list; group_list_tmp != NULL; group_list_tmp = group_list_tmp->next) {
 640                 if (strcmp(group_list_tmp->groupname, check->vp_strvalue) == 0){
 641                         RDEBUG("sql_groupcmp finished: User is a member of group %s",
 642                                check->vp_strvalue);
 643                         /* Free the grouplist */
 644                         sql_grouplist_free(&group_list);
 645                         /* Remove the username we (maybe) added above */
 646                         pairdelete(&request->packet->vps, PW_SQL_USER_NAME, 0);
 647                         sql_release_socket(inst, sqlsocket);
 648                         return 0;
 649                 }
 650         }
 651
 652         /* Free the grouplist */
 653         sql_grouplist_free(&group_list);
 654         /* Remove the username we (maybe) added above */
 655         pairdelete(&request->packet->vps, PW_SQL_USER_NAME, 0);
 656         sql_release_socket(inst,sqlsocket);
 657
 658         RDEBUG("sql_groupcmp finished: User is NOT a member of group %s",
 659                check->vp_strvalue);
 660
 661         return 1;
 662 }
 663
 664
 665
 666 static int rlm_sql_process_groups(SQL_INST *inst, REQUEST *request, SQLSOCK *sqlsocket, int *dofallthrough)
 667 {
 668         VALUE_PAIR *check_tmp = NULL;
 669         VALUE_PAIR *reply_tmp = NULL;
 670         SQL_GROUPLIST *group_list, *group_list_tmp;
 671         VALUE_PAIR *sql_group = NULL;
 672         char    querystr[MAX_QUERY_LEN];
 673         int found = 0;
 674         int rows;
 675
 676         /*
 677          *      Get the list of groups this user is a member of
 678          */
 679         if (sql_get_grouplist(inst, sqlsocket, request, &group_list) < 0) {
 680                 radlog_request(L_ERR, 0, request, "Error retrieving group list");
 681                 return -1;
 682         }
 683
 684         for (group_list_tmp = group_list; group_list_tmp != NULL && *dofallthrough != 0; group_list_tmp = group_list_tmp->next) {
 685                 /*
 686                  *      Add the Sql-Group attribute to the request list so we know
 687                  *      which group we're retrieving attributes for
 688                  */
 689                 sql_group = pairmake("Sql-Group", group_list_tmp->groupname, T_OP_EQ);
 690                 if (!sql_group) {
 691                         radlog_request(L_ERR, 0, request,
 692                                        "Error creating Sql-Group attribute");
 693                         return -1;
 694                 }
 695                 pairadd(&request->packet->vps, sql_group);
 696                 if (!radius_xlat(querystr, sizeof(querystr), inst->config->authorize_group_check_query, request, sql_escape_func)) {
 697                         radlog_request(L_ERR, 0, request,
 698                                        "Error generating query; rejecting user");
 699                         /* Remove the grouup we added above */
 700                         pairdelete(&request->packet->vps, PW_SQL_GROUP, 0);
 701                         return -1;
 702                 }
 703                 rows = sql_getvpdata(inst, sqlsocket, &check_tmp, querystr);
 704                 if (rows < 0) {
 705                         radlog_request(L_ERR, 0, request, "Error retrieving check pairs for group %s",
 706                                group_list_tmp->groupname);
 707                         /* Remove the grouup we added above */
 708                         pairdelete(&request->packet->vps, PW_SQL_GROUP, 0);
 709                         pairfree(&check_tmp);
 710                         return -1;
 711                 } else if (rows > 0) {
 712                         /*
 713                          *      Only do this if *some* check pairs were returned
 714                          */
 715                         if (paircompare(request, request->packet->vps, check_tmp, &request->reply->vps) == 0) {
 716                                 found = 1;
 717                                 RDEBUG2("User found in group %s",
 718                                         group_list_tmp->groupname);
 719                                 /*
 720                                  *      Now get the reply pairs since the paircompare matched
 721                                  */
 722                                 if (!radius_xlat(querystr, sizeof(querystr), inst->config->authorize_group_reply_query, request, sql_escape_func)) {
 723                                         radlog_request(L_ERR, 0, request, "Error generating query; rejecting user");
 724                                         /* Remove the grouup we added above */
 725                                         pairdelete(&request->packet->vps, PW_SQL_GROUP, 0);
 726                                         pairfree(&check_tmp);
 727                                         return -1;
 728                                 }
 729                                 if (sql_getvpdata(inst, sqlsocket, &reply_tmp, querystr) < 0) {
 730                                         radlog_request(L_ERR, 0, request, "Error retrieving reply pairs for group %s",
 731                                                group_list_tmp->groupname);
 732                                         /* Remove the grouup we added above */
 733                                         pairdelete(&request->packet->vps, PW_SQL_GROUP, 0);
 734                                         pairfree(&check_tmp);
 735                                         pairfree(&reply_tmp);
 736                                         return -1;
 737                                 }
 738                                 *dofallthrough = fallthrough(reply_tmp);
 739                                 pairxlatmove(request, &request->reply->vps, &reply_tmp);
 740                                 pairxlatmove(request, &request->config_items, &check_tmp);
 741                         }
 742                 } else {
 743                         /*
 744                          *      rows == 0.  This is like having the username on a line
 745                          *      in the user's file with no check vp's.  As such, we treat
 746                          *      it as found and add the reply attributes, so that we
 747                          *      match expected behavior
 748                          */
 749                         found = 1;
 750                         RDEBUG2("User found in group %s",
 751                                 group_list_tmp->groupname);
 752                         /*
 753                          *      Now get the reply pairs since the paircompare matched
 754                          */
 755                         if (!radius_xlat(querystr, sizeof(querystr), inst->config->authorize_group_reply_query, request, sql_escape_func)) {
 756                                 radlog_request(L_ERR, 0, request, "Error generating query; rejecting user");
 757                                 /* Remove the grouup we added above */
 758                                 pairdelete(&request->packet->vps, PW_SQL_GROUP, 0);
 759                                 pairfree(&check_tmp);
 760                                 return -1;
 761                         }
 762                         if (sql_getvpdata(inst, sqlsocket, &reply_tmp, querystr) < 0) {
 763                                 radlog_request(L_ERR, 0, request, "Error retrieving reply pairs for group %s",
 764                                        group_list_tmp->groupname);
 765                                 /* Remove the grouup we added above */
 766                                 pairdelete(&request->packet->vps, PW_SQL_GROUP, 0);
 767                                 pairfree(&check_tmp);
 768                                 pairfree(&reply_tmp);
 769                                 return -1;
 770                         }
 771                         *dofallthrough = fallthrough(reply_tmp);
 772                         pairxlatmove(request, &request->reply->vps, &reply_tmp);
 773                         pairxlatmove(request, &request->config_items, &check_tmp);
 774                 }
 775
 776                 /*
 777                  * Delete the Sql-Group we added above
 778                  * And clear out the pairlists
 779                  */
 780                 pairdelete(&request->packet->vps, PW_SQL_GROUP, 0);
 781                 pairfree(&check_tmp);
 782                 pairfree(&reply_tmp);
 783         }
 784
 785         sql_grouplist_free(&group_list);
 786         return found;
 787 }
 788
 789
 790 static int rlm_sql_detach(void *instance)
 791 {
 792         SQL_INST *inst = instance;
 793
 794         paircompare_unregister(PW_SQL_GROUP, sql_groupcmp);
 795
 796         if (inst->config) {
 797                 int i;
 798
 799                 if (inst->sqlpool) {
 800                         sql_poolfree(inst);
 801                 }
 802
 803                 if (inst->config->xlat_name) {
 804                         xlat_unregister(inst->config->xlat_name,(RAD_XLAT_FUNC)sql_xlat);
 805                         free(inst->config->xlat_name);
 806                 }
 807
 808                 /*
 809                  *      Free up dynamically allocated string pointers.
 810                  */
 811                 for (i = 0; module_config[i].name != NULL; i++) {
 812                         char **p;
 813                         if (module_config[i].type != PW_TYPE_STRING_PTR) {
 814                                 continue;
 815                         }
 816
 817                         /*
 818                          *      Treat 'config' as an opaque array of bytes,
 819                          *      and take the offset into it.  There's a
 820                          *      (char*) pointer at that offset, and we want
 821                          *      to point to it.
 822                          */
 823                         p = (char **) (((char *)inst->config) + module_config[i].offset);
 824                         if (!*p) { /* nothing allocated */
 825                                 continue;
 826                         }
 827                         free(*p);
 828                         *p = NULL;
 829                 }
 830                 /*
 831                  *      Catch multiple instances of the module.
 832                  */
 833                 if (allowed_chars == inst->config->allowed_chars) {
 834                         allowed_chars = NULL;
 835                 }
 836                 free(inst->config);
 837                 inst->config = NULL;
 838         }
 839
 840         if (inst->handle) {
 841 #if 0
 842                 /*
 843                  *      FIXME: Call the modules 'destroy' function?
 844                  */
 845                 lt_dlclose(inst->handle);       /* ignore any errors */
 846 #endif
 847         }
 848         free(inst);
 849
 850         return 0;
 851 }
 852 static int rlm_sql_instantiate(CONF_SECTION * conf, void **instance)
 853 {
 854         SQL_INST *inst;
 855         const char *xlat_name;
 856
 857         inst = rad_malloc(sizeof(SQL_INST));
 858         memset(inst, 0, sizeof(SQL_INST));
 859
 860         inst->config = rad_malloc(sizeof(SQL_CONFIG));
 861         memset(inst->config, 0, sizeof(SQL_CONFIG));
 862
 863         /*
 864          *      Export these methods, too.  This avoids RTDL_GLOBAL.
 865          */
 866         inst->sql_set_user = sql_set_user;
 867         inst->sql_get_socket = sql_get_socket;
 868         inst->sql_release_socket = sql_release_socket;
 869         inst->sql_escape_func = sql_escape_func;
 870         inst->sql_query = rlm_sql_query;
 871         inst->sql_select_query = rlm_sql_select_query;
 872         inst->sql_fetch_row = rlm_sql_fetch_row;
 873
 874         /*
 875          * If the configuration parameters can't be parsed, then
 876          * fail.
 877          */
 878         if (cf_section_parse(conf, inst->config, module_config) < 0) {
 879                 rlm_sql_detach(inst);
 880                 return -1;
 881         }
 882
 883         xlat_name = cf_section_name2(conf);
 884         if (xlat_name == NULL) {
 885                 xlat_name = cf_section_name1(conf);
 886         } else {
 887                 char *group_name;
 888                 DICT_ATTR *dattr;
 889                 ATTR_FLAGS flags;
 890
 891                 /*
 892                  * Allocate room for <instance>-SQL-Group
 893                  */
 894                 group_name = rad_malloc((strlen(xlat_name) + 1 + 11) * sizeof(char));
 895                 sprintf(group_name,"%s-SQL-Group",xlat_name);
 896                 DEBUG("rlm_sql Creating new attribute %s",group_name);
 897
 898                 memset(&flags, 0, sizeof(flags));
 899                 dict_addattr(group_name, 0, PW_TYPE_STRING, -1, flags);
 900                 dattr = dict_attrbyname(group_name);
 901                 if (dattr == NULL){
 902                         radlog(L_ERR, "rlm_ldap: Failed to create attribute %s",group_name);
 903                         free(group_name);
 904                         free(inst);     /* FIXME: detach */
 905                         return -1;
 906                 }
 907
 908                 if (inst->config->groupmemb_query &&
 909                     inst->config->groupmemb_query[0]) {
 910                         DEBUG("rlm_sql: Registering sql_groupcmp for %s",group_name);
 911                         paircompare_register(dattr->attr, PW_USER_NAME, sql_groupcmp, inst);
 912                 }
 913
 914                 free(group_name);
 915         }
 916         if (xlat_name){
 917                 inst->config->xlat_name = strdup(xlat_name);
 918                 xlat_register(xlat_name, (RAD_XLAT_FUNC)sql_xlat, inst);
 919         }
 920
 921         if (inst->config->num_sql_socks > MAX_SQL_SOCKS) {
 922                 radlog(L_ERR, "rlm_sql (%s): sql_instantiate: number of sqlsockets cannot exceed MAX_SQL_SOCKS, %d",
 923                        inst->config->xlat_name, MAX_SQL_SOCKS);
 924                 rlm_sql_detach(inst);
 925                 return -1;
 926         }
 927
 928         /*
 929          *      Sanity check for crazy people.
 930          */
 931         if (strncmp(inst->config->sql_driver, "rlm_sql_", 8) != 0) {
 932                 radlog(L_ERR, "\"%s\" is NOT an SQL driver!",
 933                        inst->config->sql_driver);
 934                 rlm_sql_detach(inst);
 935                 return -1;
 936         }
 937
 938         inst->handle = lt_dlopenext(inst->config->sql_driver);
 939         if (inst->handle == NULL) {
 940                 radlog(L_ERR, "Could not link driver %s: %s",
 941                        inst->config->sql_driver,
 942                        lt_dlerror());
 943                 radlog(L_ERR, "Make sure it (and all its dependent libraries!) are in the search path of your system's ld.");
 944                 rlm_sql_detach(inst);
 945                 return -1;
 946         }
 947
 948         inst->module = (rlm_sql_module_t *) lt_dlsym(inst->handle, inst->config->sql_driver);
 949         if (!inst->module) {
 950                 radlog(L_ERR, "Could not link symbol %s: %s",
 951                        inst->config->sql_driver,
 952                        lt_dlerror());
 953                 rlm_sql_detach(inst);
 954                 return -1;
 955         }
 956
 957         radlog(L_INFO, "rlm_sql (%s): Driver %s (module %s) loaded and linked",
 958                inst->config->xlat_name, inst->config->sql_driver,
 959                inst->module->name);
 960         radlog(L_INFO, "rlm_sql (%s): Attempting to connect to %s@%s:%s/%s",
 961                inst->config->xlat_name, inst->config->sql_login,
 962                inst->config->sql_server, inst->config->sql_port,
 963                inst->config->sql_db);
 964
 965         if (sql_init_socketpool(inst) < 0) {
 966                 rlm_sql_detach(inst);
 967                 return -1;
 968         }
 969
 970         if (inst->config->groupmemb_query &&
 971             inst->config->groupmemb_query[0]) {
 972                 paircompare_register(PW_SQL_GROUP, PW_USER_NAME, sql_groupcmp, inst);
 973         }
 974
 975         if (inst->config->do_clients){
 976                 if (generate_sql_clients(inst) == -1){
 977                         radlog(L_ERR, "Failed to load clients from SQL.");
 978                         rlm_sql_detach(inst);
 979                         return -1;
 980                 }
 981         }
 982         allowed_chars = inst->config->allowed_chars;
 983
 984         *instance = inst;
 985
 986         return RLM_MODULE_OK;
 987 }
 988
 989
 990 static int rlm_sql_authorize(void *instance, REQUEST * request)
 991 {
 992         VALUE_PAIR *check_tmp = NULL;
 993         VALUE_PAIR *reply_tmp = NULL;
 994         VALUE_PAIR *user_profile = NULL;
 995         int     found = 0;
 996         int     dofallthrough = 1;
 997         int     rows;
 998         SQLSOCK *sqlsocket;
 999         SQL_INST *inst = instance;
1000         char    querystr[MAX_QUERY_LEN];
1001         char    sqlusername[MAX_STRING_LEN];
1002         /*
1003          * the profile username is used as the sqlusername during
1004          * profile checking so that we don't overwrite the orignal
1005          * sqlusername string
1006          */
1007         char   profileusername[MAX_STRING_LEN];
1008
1009         /*
1010          * Set, escape, and check the user attr here
1011          */
1012         if (sql_set_user(inst, request, sqlusername, NULL) < 0)
1013                 return RLM_MODULE_FAIL;
1014
1015
1016         /*
1017          * reserve a socket
1018          */
1019         sqlsocket = sql_get_socket(inst);
1020         if (sqlsocket == NULL) {
1021                 /* Remove the username we (maybe) added above */
1022                 pairdelete(&request->packet->vps, PW_SQL_USER_NAME, 0);
1023                 return RLM_MODULE_FAIL;
1024         }
1025
1026
1027         /*
1028          *  After this point, ALL 'return's MUST release the SQL socket!
1029          */
1030
1031         /*
1032          * Alright, start by getting the specific entry for the user
1033          */
1034         if (!radius_xlat(querystr, sizeof(querystr), inst->config->authorize_check_query, request, sql_escape_func)) {
1035                 radlog_request(L_ERR, 0, request, "Error generating query; rejecting user");
1036                 sql_release_socket(inst, sqlsocket);
1037                 /* Remove the username we (maybe) added above */
1038                 pairdelete(&request->packet->vps, PW_SQL_USER_NAME, 0);
1039                 return RLM_MODULE_FAIL;
1040         }
1041         rows = sql_getvpdata(inst, sqlsocket, &check_tmp, querystr);
1042         if (rows < 0) {
1043                 radlog_request(L_ERR, 0, request, "SQL query error; rejecting user");
1044                 sql_release_socket(inst, sqlsocket);
1045                 /* Remove the username we (maybe) added above */
1046                 pairdelete(&request->packet->vps, PW_SQL_USER_NAME, 0);
1047                 pairfree(&check_tmp);
1048                 return RLM_MODULE_FAIL;
1049         } else if (rows > 0) {
1050                 /*
1051                  *      Only do this if *some* check pairs were returned
1052                  */
1053                 if (paircompare(request, request->packet->vps, check_tmp, &request->reply->vps) == 0) {
1054                         found = 1;
1055                         RDEBUG2("User found in radcheck table");
1056
1057                         if (inst->config->authorize_reply_query &&
1058                             *inst->config->authorize_reply_query) {
1059
1060                         /*
1061                          *      Now get the reply pairs since the paircompare matched
1062                          */
1063                         if (!radius_xlat(querystr, sizeof(querystr), inst->config->authorize_reply_query, request, sql_escape_func)) {
1064                                 radlog_request(L_ERR, 0, request, "Error generating query; rejecting user");
1065                                 sql_release_socket(inst, sqlsocket);
1066                                 /* Remove the username we (maybe) added above */
1067                                 pairdelete(&request->packet->vps, PW_SQL_USER_NAME, 0);
1068                                 pairfree(&check_tmp);
1069                                 return RLM_MODULE_FAIL;
1070                         }
1071                         if (sql_getvpdata(inst, sqlsocket, &reply_tmp, querystr) < 0) {
1072                                 radlog_request(L_ERR, 0, request, "SQL query error; rejecting user");
1073                                 sql_release_socket(inst, sqlsocket);
1074                                 /* Remove the username we (maybe) added above */
1075                                 pairdelete(&request->packet->vps, PW_SQL_USER_NAME, 0);
1076                                 pairfree(&check_tmp);
1077                                 pairfree(&reply_tmp);
1078                                 return RLM_MODULE_FAIL;
1079                         }
1080
1081                         if (!inst->config->read_groups)
1082                                 dofallthrough = fallthrough(reply_tmp);
1083                         pairxlatmove(request, &request->reply->vps, &reply_tmp);
1084                         }
1085                         pairxlatmove(request, &request->config_items, &check_tmp);
1086                 }
1087         }
1088
1089         /*
1090          *      Clear out the pairlists
1091          */
1092         pairfree(&check_tmp);
1093         pairfree(&reply_tmp);
1094
1095         /*
1096          *      dofallthrough is set to 1 by default so that if the user information
1097          *      is not found, we will still process groups.  If the user information,
1098          *      however, *is* found, Fall-Through must be set in order to process
1099          *      the groups as well
1100          */
1101         if (dofallthrough) {
1102                 rows = rlm_sql_process_groups(inst, request, sqlsocket, &dofallthrough);
1103                 if (rows < 0) {
1104                         radlog_request(L_ERR, 0, request, "Error processing groups; rejecting user");
1105                         sql_release_socket(inst, sqlsocket);
1106                         /* Remove the username we (maybe) added above */
1107                         pairdelete(&request->packet->vps, PW_SQL_USER_NAME, 0);
1108                         return RLM_MODULE_FAIL;
1109                 } else if (rows > 0) {
1110                         found = 1;
1111                 }
1112         }
1113
1114         /*
1115          *      repeat the above process with the default profile or User-Profile
1116          */
1117         if (dofallthrough) {
1118                 int profile_found = 0;
1119                 /*
1120                 * Check for a default_profile or for a User-Profile.
1121                 */
1122                 user_profile = pairfind(request->config_items, PW_USER_PROFILE, 0);
1123                 if (inst->config->default_profile[0] != 0 || user_profile != NULL){
1124                         char *profile = inst->config->default_profile;
1125
1126                         if (user_profile != NULL)
1127                                 profile = user_profile->vp_strvalue;
1128                         if (profile && strlen(profile)){
1129                                 RDEBUG("Checking profile %s", profile);
1130                                 if (sql_set_user(inst, request, profileusername, profile) < 0) {
1131                                         radlog_request(L_ERR, 0, request, "Error setting profile; rejecting user");
1132                                         sql_release_socket(inst, sqlsocket);
1133                                         /* Remove the username we (maybe) added above */
1134                                         pairdelete(&request->packet->vps, PW_SQL_USER_NAME, 0);
1135                                         return RLM_MODULE_FAIL;
1136                                 } else {
1137                                         profile_found = 1;
1138                                 }
1139                         }
1140                 }
1141
1142                 if (profile_found) {
1143                         rows = rlm_sql_process_groups(inst, request, sqlsocket, &dofallthrough);
1144                         if (rows < 0) {
1145                                 radlog_request(L_ERR, 0, request, "Error processing profile groups; rejecting user");
1146                                 sql_release_socket(inst, sqlsocket);
1147                                 /* Remove the username we (maybe) added above */
1148                                 pairdelete(&request->packet->vps, PW_SQL_USER_NAME, 0);
1149                                 return RLM_MODULE_FAIL;
1150                         } else if (rows > 0) {
1151                                 found = 1;
1152                         }
1153                 }
1154         }
1155
1156         /* Remove the username we (maybe) added above */
1157         pairdelete(&request->packet->vps, PW_SQL_USER_NAME, 0);
1158         sql_release_socket(inst, sqlsocket);
1159
1160         if (!found) {
1161                 RDEBUG("User %s not found", sqlusername);
1162                 return RLM_MODULE_NOTFOUND;
1163         } else {
1164                 return RLM_MODULE_OK;
1165         }
1166 }
1167
1168 /*
1169  *      Accounting: save the account data to our sql table
1170  */
1171 static int rlm_sql_accounting(void *instance, REQUEST * request) {
1172
1173         SQLSOCK *sqlsocket = NULL;
1174         VALUE_PAIR *pair;
1175         SQL_INST *inst = instance;
1176         int     ret = RLM_MODULE_OK;
1177         int     numaffected = 0;
1178         int     acctstatustype = 0;
1179         char    querystr[MAX_QUERY_LEN];
1180         char    logstr[MAX_QUERY_LEN];
1181         char    sqlusername[MAX_STRING_LEN];
1182
1183 #ifdef CISCO_ACCOUNTING_HACK
1184         int     acctsessiontime = 0;
1185 #endif
1186
1187         memset(querystr, 0, MAX_QUERY_LEN);
1188
1189         /*
1190          * Find the Acct Status Type
1191          */
1192         if ((pair = pairfind(request->packet->vps, PW_ACCT_STATUS_TYPE, 0)) != NULL) {
1193                 acctstatustype = pair->vp_integer;
1194         } else {
1195                 radius_xlat(logstr, sizeof(logstr), "packet has no accounting status type. [user '%{User-Name}', nas '%{NAS-IP-Address}']", request, NULL);
1196                 radlog_request(L_ERR, 0, request, "%s", logstr);
1197                 return RLM_MODULE_INVALID;
1198         }
1199
1200         switch (acctstatustype) {
1201                         /*
1202                          * The Terminal server informed us that it was rebooted
1203                          * STOP all records from this NAS
1204                          */
1205                 case PW_STATUS_ACCOUNTING_ON:
1206                 case PW_STATUS_ACCOUNTING_OFF:
1207                         RDEBUG("Received Acct On/Off packet");
1208                         radius_xlat(querystr, sizeof(querystr), inst->config->accounting_onoff_query, request, sql_escape_func);
1209                         query_log(request, inst, querystr);
1210
1211                         sqlsocket = sql_get_socket(inst);
1212                         if (sqlsocket == NULL)
1213                                 return(RLM_MODULE_FAIL);
1214                         if (*querystr) { /* non-empty query */
1215                                 if (rlm_sql_query(sqlsocket, inst, querystr)) {
1216                                         radlog_request(L_ERR, 0, request, "Couldn't update SQL accounting for Acct On/Off packet - %s",
1217                                                (inst->module->sql_error)(sqlsocket, inst->config));
1218                                         ret = RLM_MODULE_FAIL;
1219                                 }
1220                                 (inst->module->sql_finish_query)(sqlsocket, inst->config);
1221                         }
1222
1223                         break;
1224
1225                         /*
1226                          * Got an update accounting packet
1227                          */
1228                 case PW_STATUS_ALIVE:
1229
1230                         /*
1231                          * Set, escape, and check the user attr here
1232                          */
1233                         sql_set_user(inst, request, sqlusername, NULL);
1234
1235                         radius_xlat(querystr, sizeof(querystr), inst->config->accounting_update_query, request, sql_escape_func);
1236                         query_log(request, inst, querystr);
1237
1238                         sqlsocket = sql_get_socket(inst);
1239                         if (sqlsocket == NULL)
1240                                 return(RLM_MODULE_FAIL);
1241                         if (*querystr) { /* non-empty query */
1242                                 if (rlm_sql_query(sqlsocket, inst, querystr)) {
1243                                         radlog_request(L_ERR, 0, request, "Couldn't update SQL accounting ALIVE record - %s",
1244                                                (inst->module->sql_error)(sqlsocket, inst->config));
1245                                         ret = RLM_MODULE_FAIL;
1246                                 }
1247                                 else {
1248                                         numaffected = (inst->module->sql_affected_rows)(sqlsocket, inst->config);
1249                                         if (numaffected < 1) {
1250
1251                                                 /*
1252                                                  * If our update above didn't match anything
1253                                                  * we assume it's because we haven't seen a
1254                                                  * matching Start record.  So we have to
1255                                                  * insert this update rather than do an update
1256                                                  */
1257                                                 radius_xlat(querystr, sizeof(querystr), inst->config->accounting_update_query_alt, request, sql_escape_func);
1258                                                 query_log(request, inst, querystr);
1259                                                 if (*querystr) { /* non-empty query */
1260                                                         if (rlm_sql_query(sqlsocket, inst, querystr)) {
1261                                                                 radlog_request(L_ERR, 0, request, "Couldn't insert SQL accounting ALIVE record - %s",
1262                                                                        (inst->module->sql_error)(sqlsocket, inst->config));
1263                                                                 ret = RLM_MODULE_FAIL;
1264                                                         }
1265                                                         (inst->module->sql_finish_query)(sqlsocket, inst->config);
1266                                                 }
1267                                         }
1268                                 }
1269                                 (inst->module->sql_finish_query)(sqlsocket, inst->config);
1270                         }
1271                         break;
1272
1273                         /*
1274                          * Got accounting start packet
1275                          */
1276                 case PW_STATUS_START:
1277
1278                         /*
1279                          * Set, escape, and check the user attr here
1280                          */
1281                         sql_set_user(inst, request, sqlusername, NULL);
1282
1283                         radius_xlat(querystr, sizeof(querystr), inst->config->accounting_start_query, request, sql_escape_func);
1284                         query_log(request, inst, querystr);
1285
1286                         sqlsocket = sql_get_socket(inst);
1287                         if (sqlsocket == NULL)
1288                                 return(RLM_MODULE_FAIL);
1289                         if (*querystr) { /* non-empty query */
1290                                 if (rlm_sql_query(sqlsocket, inst, querystr)) {
1291                                         radlog_request(L_ERR, 0, request, "Couldn't insert SQL accounting START record - %s",
1292                                                (inst->module->sql_error)(sqlsocket, inst->config));
1293
1294                                         /*
1295                                          * We failed the insert above.  It's probably because
1296                                          * the stop record came before the start.  We try
1297                                          * our alternate query now (typically an UPDATE)
1298                                          */
1299                                         radius_xlat(querystr, sizeof(querystr), inst->config->accounting_start_query_alt, request, sql_escape_func);
1300                                         query_log(request, inst, querystr);
1301
1302                                         if (*querystr) { /* non-empty query */
1303                                                 if (rlm_sql_query(sqlsocket, inst, querystr)) {
1304                                                         radlog_request(L_ERR, 0, request, "Couldn't update SQL accounting START record - %s",
1305                                                                (inst->module->sql_error)(sqlsocket, inst->config));
1306                                                         ret = RLM_MODULE_FAIL;
1307                                                 }
1308                                                 (inst->module->sql_finish_query)(sqlsocket, inst->config);
1309                                         }
1310                                 }
1311                                 (inst->module->sql_finish_query)(sqlsocket, inst->config);
1312                         }
1313                         break;
1314
1315                         /*
1316                          * Got accounting stop packet
1317                          */
1318                 case PW_STATUS_STOP:
1319
1320                         /*
1321                          * Set, escape, and check the user attr here
1322                          */
1323                         sql_set_user(inst, request, sqlusername, NULL);
1324
1325                         radius_xlat(querystr, sizeof(querystr), inst->config->accounting_stop_query, request, sql_escape_func);
1326                         query_log(request, inst, querystr);
1327
1328                         sqlsocket = sql_get_socket(inst);
1329                         if (sqlsocket == NULL)
1330                                 return(RLM_MODULE_FAIL);
1331                         if (*querystr) { /* non-empty query */
1332                                 if (rlm_sql_query(sqlsocket, inst, querystr)) {
1333                                         radlog_request(L_ERR, 0, request, "Couldn't update SQL accounting STOP record - %s",
1334                                                (inst->module->sql_error)(sqlsocket, inst->config));
1335                                         ret = RLM_MODULE_FAIL;
1336                                 }
1337                                 else {
1338                                         numaffected = (inst->module->sql_affected_rows)(sqlsocket, inst->config);
1339                                         if (numaffected < 1) {
1340                                                 /*
1341                                                  * If our update above didn't match anything
1342                                                  * we assume it's because we haven't seen a
1343                                                  * matching Start record.  So we have to
1344                                                  * insert this stop rather than do an update
1345                                                  */
1346 #ifdef CISCO_ACCOUNTING_HACK
1347                                                 /*
1348                                                  * If stop but zero session length AND no previous
1349                                                  * session found, drop it as in invalid packet
1350                                                  * This is to fix CISCO's aaa from filling our
1351                                                  * table with bogus crap
1352                                                  */
1353                                                 if ((pair = pairfind(request->packet->vps, PW_ACCT_SESSION_TIME, 0)) != NULL)
1354                                                         acctsessiontime = pair->vp_integer;
1355
1356                                                 if (acctsessiontime <= 0) {
1357                                                         radius_xlat(logstr, sizeof(logstr), "stop packet with zero session length. [user '%{User-Name}', nas '%{NAS-IP-Address}']", request, NULL);
1358                                                         radlog_request(L_DBG, 0, request, "%s", logstr);
1359                                                         sql_release_socket(inst, sqlsocket);
1360                                                         return RLM_MODULE_NOOP;
1361                                                 }
1362 #endif
1363
1364                                                 radius_xlat(querystr, sizeof(querystr), inst->config->accounting_stop_query_alt, request, sql_escape_func);
1365                                                 query_log(request, inst, querystr);
1366
1367                                                 if (*querystr) { /* non-empty query */
1368                                                         if (rlm_sql_query(sqlsocket, inst, querystr)) {
1369                                                                 radlog_request(L_ERR, 0, request, "Couldn't insert SQL accounting STOP record - %s",
1370
1371                                                                        (inst->module->sql_error)(sqlsocket, inst->config));
1372                                                                 ret = RLM_MODULE_FAIL;
1373                                                         }
1374                                                         (inst->module->sql_finish_query)(sqlsocket, inst->config);
1375                                                 }
1376                                         }
1377                                 }
1378                                 (inst->module->sql_finish_query)(sqlsocket, inst->config);
1379                         }
1380                         break;
1381
1382                         /*
1383                          *      Anything else is ignored.
1384                          */
1385                 default:
1386                         RDEBUG("Unsupported Acct-Status-Type = %d",
1387                        acctstatustype);
1388                         return RLM_MODULE_NOOP;
1389                         break;
1390
1391         }
1392
1393         sql_release_socket(inst, sqlsocket);
1394
1395         return ret;
1396 }
1397
1398
1399 /*
1400  *        See if a user is already logged in. Sets request->simul_count to the
1401  *        current session count for this user.
1402  *
1403  *        Check twice. If on the first pass the user exceeds his
1404  *        max. number of logins, do a second pass and validate all
1405  *        logins by querying the terminal server (using eg. SNMP).
1406  */
1407
1408 static int rlm_sql_checksimul(void *instance, REQUEST * request) {
1409         SQLSOCK         *sqlsocket;
1410         SQL_INST        *inst = instance;
1411         SQL_ROW         row;
1412         char            querystr[MAX_QUERY_LEN];
1413         char            sqlusername[MAX_STRING_LEN];
1414         int             check = 0;
1415         uint32_t        ipno = 0;
1416         char            *call_num = NULL;
1417         VALUE_PAIR      *vp;
1418         int             ret;
1419         uint32_t        nas_addr = 0;
1420         int             nas_port = 0;
1421
1422         /* If simul_count_query is not defined, we don't do any checking */
1423         if (!inst->config->simul_count_query ||
1424             (inst->config->simul_count_query[0] == 0)) {
1425                 return RLM_MODULE_NOOP;
1426         }
1427
1428         if((request->username == NULL) || (request->username->length == 0)) {
1429                 radlog_request(L_ERR, 0, request, "Zero Length username not permitted\n");
1430                 return RLM_MODULE_INVALID;
1431         }
1432
1433
1434         if(sql_set_user(inst, request, sqlusername, NULL) < 0)
1435                 return RLM_MODULE_FAIL;
1436
1437         radius_xlat(querystr, sizeof(querystr), inst->config->simul_count_query, request, sql_escape_func);
1438
1439         /* initialize the sql socket */
1440         sqlsocket = sql_get_socket(inst);
1441         if(sqlsocket == NULL)
1442                 return RLM_MODULE_FAIL;
1443
1444         if(rlm_sql_select_query(sqlsocket, inst, querystr)) {
1445                 radlog(L_ERR, "rlm_sql (%s) sql_checksimul: Database query failed", inst->config->xlat_name);
1446                 sql_release_socket(inst, sqlsocket);
1447                 return RLM_MODULE_FAIL;
1448         }
1449
1450         ret = rlm_sql_fetch_row(sqlsocket, inst);
1451
1452         if (ret != 0) {
1453                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1454                 sql_release_socket(inst, sqlsocket);
1455                 return RLM_MODULE_FAIL;
1456         }
1457
1458         row = sqlsocket->row;
1459         if (row == NULL) {
1460                 (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1461                 sql_release_socket(inst, sqlsocket);
1462                 return RLM_MODULE_FAIL;
1463         }
1464
1465         request->simul_count = atoi(row[0]);
1466         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1467
1468         if(request->simul_count < request->simul_max) {
1469                 sql_release_socket(inst, sqlsocket);
1470                 return RLM_MODULE_OK;
1471         }
1472
1473         /*
1474          *      Looks like too many sessions, so let's start verifying
1475          *      them, unless told to rely on count query only.
1476          */
1477         if (!inst->config->simul_verify_query ||
1478             (inst->config->simul_verify_query[0] == '\0')) {
1479                 sql_release_socket(inst, sqlsocket);
1480                 return RLM_MODULE_OK;
1481         }
1482
1483         radius_xlat(querystr, sizeof(querystr), inst->config->simul_verify_query, request, sql_escape_func);
1484         if(rlm_sql_select_query(sqlsocket, inst, querystr)) {
1485                 radlog_request(L_ERR, 0, request, "Database query error");
1486                 sql_release_socket(inst, sqlsocket);
1487                 return RLM_MODULE_FAIL;
1488         }
1489
1490         /*
1491          *      Setup some stuff, like for MPP detection.
1492          */
1493         request->simul_count = 0;
1494
1495         if ((vp = pairfind(request->packet->vps, PW_FRAMED_IP_ADDRESS, 0)) != NULL)
1496                 ipno = vp->vp_ipaddr;
1497         if ((vp = pairfind(request->packet->vps, PW_CALLING_STATION_ID, 0)) != NULL)
1498                 call_num = vp->vp_strvalue;
1499
1500
1501         while (rlm_sql_fetch_row(sqlsocket, inst) == 0) {
1502                 row = sqlsocket->row;
1503                 if (row == NULL)
1504                         break;
1505                 if (!row[2]){
1506                         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1507                         sql_release_socket(inst, sqlsocket);
1508                         RDEBUG("Cannot zap stale entry. No username present in entry.", inst->config->xlat_name);
1509                         return RLM_MODULE_FAIL;
1510                 }
1511                 if (!row[1]){
1512                         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1513                         sql_release_socket(inst, sqlsocket);
1514                         RDEBUG("Cannot zap stale entry. No session id in entry.", inst->config->xlat_name);
1515                         return RLM_MODULE_FAIL;
1516                 }
1517                 if (row[3])
1518                         nas_addr = inet_addr(row[3]);
1519                 if (row[4])
1520                         nas_port = atoi(row[4]);
1521
1522                 check = rad_check_ts(nas_addr, nas_port, row[2], row[1]);
1523
1524                 if (check == 0) {
1525                         /*
1526                          *      Stale record - zap it.
1527                          */
1528                         if (inst->config->deletestalesessions == TRUE) {
1529                                 uint32_t framed_addr = 0;
1530                                 char proto = 0;
1531                                 int sess_time = 0;
1532
1533                                 if (row[5])
1534                                         framed_addr = inet_addr(row[5]);
1535                                 if (row[7]){
1536                                         if (strcmp(row[7], "PPP") == 0)
1537                                                 proto = 'P';
1538                                         else if (strcmp(row[7], "SLIP") == 0)
1539                                                 proto = 'S';
1540                                 }
1541                                 if (row[8])
1542                                         sess_time = atoi(row[8]);
1543                                 session_zap(request, nas_addr, nas_port,
1544                                             row[2], row[1], framed_addr,
1545                                             proto, sess_time);
1546                         }
1547                 }
1548                 else if (check == 1) {
1549                         /*
1550                          *      User is still logged in.
1551                          */
1552                         ++request->simul_count;
1553
1554                         /*
1555                          *      Does it look like a MPP attempt?
1556                          */
1557                         if (row[5] && ipno && inet_addr(row[5]) == ipno)
1558                                 request->simul_mpp = 2;
1559                         else if (row[6] && call_num &&
1560                                 !strncmp(row[6],call_num,16))
1561                                 request->simul_mpp = 2;
1562                 }
1563                 else {
1564                         /*
1565                          *      Failed to check the terminal server for
1566                          *      duplicate logins: return an error.
1567                          */
1568                         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1569                         sql_release_socket(inst, sqlsocket);
1570                         radlog_request(L_ERR, 0, request, "Failed to check the terminal server for user '%s'.", row[2]);
1571                         return RLM_MODULE_FAIL;
1572                 }
1573         }
1574
1575         (inst->module->sql_finish_select_query)(sqlsocket, inst->config);
1576         sql_release_socket(inst, sqlsocket);
1577
1578         /*
1579          *      The Auth module apparently looks at request->simul_count,
1580          *      not the return value of this module when deciding to deny
1581          *      a call for too many sessions.
1582          */
1583         return RLM_MODULE_OK;
1584 }
1585
1586 /*
1587  *      Execute postauth_query after authentication
1588  */
1589 static int rlm_sql_postauth(void *instance, REQUEST *request) {
1590         SQLSOCK         *sqlsocket = NULL;
1591         SQL_INST        *inst = instance;
1592         char            querystr[MAX_QUERY_LEN];
1593         char            sqlusername[MAX_STRING_LEN];
1594
1595         if(sql_set_user(inst, request, sqlusername, NULL) < 0)
1596                 return RLM_MODULE_FAIL;
1597
1598         /* If postauth_query is not defined, we stop here */
1599         if (!inst->config->postauth_query ||
1600             (inst->config->postauth_query[0] == '\0'))
1601                 return RLM_MODULE_NOOP;
1602
1603         /* Expand variables in the query */
1604         memset(querystr, 0, MAX_QUERY_LEN);
1605         radius_xlat(querystr, sizeof(querystr), inst->config->postauth_query,
1606                     request, sql_escape_func);
1607         query_log(request, inst, querystr);
1608         DEBUG2("rlm_sql (%s) in sql_postauth: query is %s",
1609                inst->config->xlat_name, querystr);
1610
1611         /* Initialize the sql socket */
1612         sqlsocket = sql_get_socket(inst);
1613         if (sqlsocket == NULL)
1614                 return RLM_MODULE_FAIL;
1615
1616         /* Process the query */
1617         if (rlm_sql_query(sqlsocket, inst, querystr)) {
1618                 radlog(L_ERR, "rlm_sql (%s) in sql_postauth: Database query error - %s",
1619                        inst->config->xlat_name,
1620                        (inst->module->sql_error)(sqlsocket, inst->config));
1621                 sql_release_socket(inst, sqlsocket);
1622                 return RLM_MODULE_FAIL;
1623         }
1624         (inst->module->sql_finish_query)(sqlsocket, inst->config);
1625
1626         sql_release_socket(inst, sqlsocket);
1627         return RLM_MODULE_OK;
1628 }
1629
1630 /* globally exported name */
1631 module_t rlm_sql = {
1632         RLM_MODULE_INIT,
1633         "SQL",
1634         RLM_TYPE_THREAD_SAFE,   /* type: reserved */
1635         rlm_sql_instantiate,    /* instantiation */
1636         rlm_sql_detach,         /* detach */
1637         {
1638                 NULL,                   /* authentication */
1639                 rlm_sql_authorize,      /* authorization */
1640                 NULL,                   /* preaccounting */
1641                 rlm_sql_accounting,     /* accounting */
1642                 rlm_sql_checksimul,     /* checksimul */
1643                 NULL,                   /* pre-proxy */
1644                 NULL,                   /* post-proxy */
1645                 rlm_sql_postauth        /* post-auth */
1646         },
1647 };