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