src/modules/rlm_sql/rlm_sql.c

   1 /*
   2  *   This program is is free software; you can redistribute it and/or modify
   3  *   it under the terms of the GNU General Public License, version 2 if the
   4  *   License as published by the Free Software Foundation.
   5  *
   6  *   This program is distributed in the hope that it will be useful,
   7  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
   8  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9  *   GNU General Public License for more details.
  10  *
  11  *   You should have received a copy of the GNU General Public License
  12  *   along with this program; if not, write to the Free Software
  13  *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  14  */
  15
  16 /**
  17  * $Id$
  18  * @file rlm_sql.c
  19  * @brief Implements SQL 'users' file, and SQL accounting.
  20  *
  21  * @copyright 2012  Arran Cudbard-Bell <a.cudbardb@freeradius.org>
  22  * @copyright 2000,2006  The FreeRADIUS server project
  23  * @copyright 2000  Mike Machado <mike@innercite.com>
  24  * @copyright 2000  Alan DeKok <aland@ox.org>
  25  */
  26 RCSID("$Id$")
  27
  28 #include <ctype.h>
  29
  30 #include <freeradius-devel/radiusd.h>
  31 #include <freeradius-devel/modules.h>
  32 #include <freeradius-devel/token.h>
  33 #include <freeradius-devel/rad_assert.h>
  34
  35 #include <sys/stat.h>
  36
  37 #include "rlm_sql.h"
  38
  39 /*
  40  *      So we can do pass2 xlat checks on the queries.
  41  */
  42 static const CONF_PARSER query_config[] = {
  43
  44         { "query", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_XLAT | PW_TYPE_MULTI, rlm_sql_config_t, accounting.query), NULL },
  45
  46         {NULL, -1, 0, NULL, NULL}
  47 };
  48
  49 /*
  50  *      For now hard-code the subsections.  This isn't perfect, but it
  51  *      helps the average case.
  52  */
  53 static const CONF_PARSER type_config[] = {
  54
  55         { "accounting-on", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) query_config },
  56         { "accounting-off", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) query_config },
  57         { "start", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) query_config },
  58         { "interim-update", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) query_config },
  59         { "stop", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) query_config },
  60
  61         {NULL, -1, 0, NULL, NULL}
  62 };
  63
  64
  65
  66 static const CONF_PARSER acct_config[] = {
  67         { "reference", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_XLAT, rlm_sql_config_t, accounting.reference), ".query" },
  68         { "logfile", FR_CONF_OFFSET(PW_TYPE_STRING, rlm_sql_config_t, accounting.logfile), NULL },
  69
  70         { "type", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) type_config },
  71
  72         {NULL, -1, 0, NULL, NULL}
  73 };
  74
  75 static const CONF_PARSER postauth_config[] = {
  76         { "reference", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_XLAT, rlm_sql_config_t, postauth.reference), ".query" },
  77         { "logfile", FR_CONF_OFFSET(PW_TYPE_STRING, rlm_sql_config_t, postauth.logfile), NULL },
  78
  79         { "query", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_XLAT | PW_TYPE_MULTI, rlm_sql_config_t, postauth.query), NULL },
  80
  81         {NULL, -1, 0, NULL, NULL}
  82 };
  83
  84 static const CONF_PARSER module_config[] = {
  85         { "driver", FR_CONF_OFFSET(PW_TYPE_STRING, rlm_sql_config_t, sql_driver_name), "rlm_sql_null" },
  86         { "server", FR_CONF_OFFSET(PW_TYPE_STRING, rlm_sql_config_t, sql_server), "localhost" },
  87         { "port", FR_CONF_OFFSET(PW_TYPE_STRING, rlm_sql_config_t, sql_port), "" },
  88         { "login", FR_CONF_OFFSET(PW_TYPE_STRING, rlm_sql_config_t, sql_login), "" },
  89         { "password", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_SECRET, rlm_sql_config_t, sql_password), "" },
  90         { "radius_db", FR_CONF_OFFSET(PW_TYPE_STRING, rlm_sql_config_t, sql_db), "radius" },
  91         { "read_groups", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, rlm_sql_config_t, read_groups), "yes" },
  92         { "read_profiles", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, rlm_sql_config_t, read_profiles), "yes" },
  93         { "readclients", FR_CONF_OFFSET(PW_TYPE_BOOLEAN | PW_TYPE_DEPRECATED, rlm_sql_config_t, do_clients), NULL },
  94         { "read_clients", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, rlm_sql_config_t, do_clients), "no" },
  95         { "deletestalesessions", FR_CONF_OFFSET(PW_TYPE_BOOLEAN | PW_TYPE_DEPRECATED, rlm_sql_config_t, deletestalesessions), NULL },
  96         { "delete_stale_sessions", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, rlm_sql_config_t, deletestalesessions), "yes" },
  97         { "sql_user_name", FR_CONF_OFFSET(PW_TYPE_STRING, rlm_sql_config_t, query_user), "" },
  98         { "logfile", FR_CONF_OFFSET(PW_TYPE_STRING, rlm_sql_config_t, logfile), NULL },
  99         { "default_user_profile", FR_CONF_OFFSET(PW_TYPE_STRING, rlm_sql_config_t, default_profile), "" },
 100         { "nas_query", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_DEPRECATED, rlm_sql_config_t, client_query), NULL },
 101         { "client_query", FR_CONF_OFFSET(PW_TYPE_STRING, rlm_sql_config_t, client_query), "SELECT id,nasname,shortname,type,secret FROM nas" },
 102         { "open_query", FR_CONF_OFFSET(PW_TYPE_STRING, rlm_sql_config_t, open_query), NULL },
 103
 104         { "authorize_check_query", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_XLAT, rlm_sql_config_t, authorize_check_query), NULL },
 105         { "authorize_reply_query", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_XLAT, rlm_sql_config_t, authorize_reply_query), NULL },
 106
 107         { "authorize_group_check_query", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_XLAT, rlm_sql_config_t, authorize_group_check_query), "" },
 108         { "authorize_group_reply_query", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_XLAT, rlm_sql_config_t, authorize_group_reply_query), "" },
 109         { "group_membership_query", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_XLAT, rlm_sql_config_t, groupmemb_query), NULL },
 110 #ifdef WITH_SESSION_MGMT
 111         { "simul_count_query", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_XLAT, rlm_sql_config_t, simul_count_query), "" },
 112         { "simul_verify_query", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_XLAT, rlm_sql_config_t, simul_verify_query), "" },
 113 #endif
 114         { "safe-characters", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_DEPRECATED, rlm_sql_config_t, allowed_chars), NULL },
 115         { "safe_characters", FR_CONF_OFFSET(PW_TYPE_STRING, rlm_sql_config_t, allowed_chars), "@abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.-_: /" },
 116
 117         /*
 118          *      This only works for a few drivers.
 119          */
 120         { "query_timeout", FR_CONF_OFFSET(PW_TYPE_INTEGER, rlm_sql_config_t, query_timeout), NULL },
 121
 122         { "accounting", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) acct_config },
 123
 124         { "post-auth", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) postauth_config },
 125
 126         {NULL, -1, 0, NULL, NULL}
 127 };
 128
 129 /*
 130  *      Fall-Through checking function from rlm_files.c
 131  */
 132 static sql_fall_through_t fall_through(VALUE_PAIR *vp)
 133 {
 134         VALUE_PAIR *tmp;
 135         tmp = pairfind(vp, PW_FALL_THROUGH, 0, TAG_ANY);
 136
 137         return tmp ? tmp->vp_integer : FALL_THROUGH_DEFAULT;
 138 }
 139
 140 /*
 141  *      Yucky prototype.
 142  */
 143 static int generate_sql_clients(rlm_sql_t *inst);
 144 static size_t sql_escape_func(REQUEST *, char *out, size_t outlen, char const *in, void *arg);
 145
 146 /*
 147  *                      SQL xlat function
 148  *
 149  *  For selects the first value of the first column will be returned,
 150  *  for inserts, updates and deletes the number of rows affected will be
 151  *  returned instead.
 152  */
 153 static ssize_t sql_xlat(void *instance, REQUEST *request, char const *query, char *out, size_t freespace)
 154 {
 155         rlm_sql_handle_t *handle = NULL;
 156         rlm_sql_row_t row;
 157         rlm_sql_t *inst = instance;
 158         ssize_t ret = 0;
 159         size_t len = 0;
 160
 161         /*
 162          *      Add SQL-User-Name attribute just in case it is needed
 163          *      We could search the string fmt for SQL-User-Name to see if this is
 164          *      needed or not
 165          */
 166         sql_set_user(inst, request, NULL);
 167
 168         handle = fr_connection_get(inst->pool);
 169         if (!handle) {
 170                 return 0;
 171         }
 172
 173         rlm_sql_query_log(inst, request, NULL, query);
 174
 175         /*
 176          *      If the query starts with any of the following prefixes,
 177          *      then return the number of rows affected
 178          */
 179         if ((strncasecmp(query, "insert", 6) == 0) ||
 180             (strncasecmp(query, "update", 6) == 0) ||
 181             (strncasecmp(query, "delete", 6) == 0)) {
 182                 int numaffected;
 183                 char buffer[21]; /* 64bit max is 20 decimal chars + null byte */
 184
 185                 if (rlm_sql_query(&handle, inst, query) != RLM_SQL_OK) {
 186                         char const *error = (inst->module->sql_error)(handle, inst->config);
 187                         REDEBUG("SQL query failed: %s", error);
 188
 189                         ret = -1;
 190                         goto finish;
 191                 }
 192
 193                 numaffected = (inst->module->sql_affected_rows)(handle, inst->config);
 194                 if (numaffected < 1) {
 195                         RDEBUG("SQL query affected no rows");
 196
 197                         goto finish;
 198                 }
 199
 200                 /*
 201                  *      Don't chop the returned number if freespace is
 202                  *      too small.  This hack is necessary because
 203                  *      some implementations of snprintf return the
 204                  *      size of the written data, and others return
 205                  *      the size of the data they *would* have written
 206                  *      if the output buffer was large enough.
 207                  */
 208                 snprintf(buffer, sizeof(buffer), "%d", numaffected);
 209
 210                 len = strlen(buffer);
 211                 if (len >= freespace){
 212                         RDEBUG("rlm_sql (%s): Can't write result, insufficient string space", inst->config->xlat_name);
 213
 214                         (inst->module->sql_finish_query)(handle, inst->config);
 215
 216                         ret = -1;
 217                         goto finish;
 218                 }
 219
 220                 memcpy(out, buffer, len + 1); /* we did bounds checking above */
 221                 ret = len;
 222
 223                 (inst->module->sql_finish_query)(handle, inst->config);
 224
 225                 goto finish;
 226         } /* else it's a SELECT statement */
 227
 228         if (rlm_sql_select_query(&handle, inst, query) != RLM_SQL_OK) {
 229                 ret = -1;  /* error handled by rlm_sql_select_query */
 230
 231                 goto finish;
 232         }
 233
 234         ret = rlm_sql_fetch_row(&handle, inst);
 235         if (ret) {
 236                 REDEBUG("SQL query failed");
 237                 (inst->module->sql_finish_select_query)(handle, inst->config);
 238                 ret = -1;
 239
 240                 goto finish;
 241         }
 242
 243         row = handle->row;
 244         if (!row) {
 245                 RDEBUG("SQL query returned no results");
 246                 (inst->module->sql_finish_select_query)(handle, inst->config);
 247                 ret = -1;
 248
 249                 goto finish;
 250         }
 251
 252         if (!row[0]){
 253                 RDEBUG("NULL value in first column of result");
 254                 (inst->module->sql_finish_select_query)(handle, inst->config);
 255                 ret = -1;
 256
 257                 goto finish;
 258         }
 259
 260         len = strlen(row[0]);
 261         if (len >= freespace){
 262                 RDEBUG("Insufficient string space");
 263                 (inst->module->sql_finish_select_query)(handle, inst->config);
 264
 265                 ret = -1;
 266                 goto finish;
 267         }
 268
 269         strlcpy(out, row[0], freespace);
 270         ret = len;
 271
 272         (inst->module->sql_finish_select_query)(handle, inst->config);
 273
 274 finish:
 275         fr_connection_release(inst->pool, handle);
 276
 277         return ret;
 278 }
 279
 280 static int generate_sql_clients(rlm_sql_t *inst)
 281 {
 282         rlm_sql_handle_t *handle;
 283         rlm_sql_row_t row;
 284         unsigned int i = 0;
 285         RADCLIENT *c;
 286
 287         DEBUG("rlm_sql (%s): Processing generate_sql_clients",
 288               inst->config->xlat_name);
 289
 290         DEBUG("rlm_sql (%s) in generate_sql_clients: query is %s",
 291               inst->config->xlat_name, inst->config->client_query);
 292
 293         handle = fr_connection_get(inst->pool);
 294         if (!handle) {
 295                 return -1;
 296         }
 297
 298         if (rlm_sql_select_query(&handle, inst, inst->config->client_query) != RLM_SQL_OK) return -1;
 299
 300         while ((rlm_sql_fetch_row(&handle, inst) == 0) && (row = handle->row)) {
 301                 char *server = NULL;
 302                 i++;
 303
 304                 /*
 305                  *  The return data for each row MUST be in the following order:
 306                  *
 307                  *  0. Row ID (currently unused)
 308                  *  1. Name (or IP address)
 309                  *  2. Shortname
 310                  *  3. Type
 311                  *  4. Secret
 312                  *  5. Virtual Server (optional)
 313                  */
 314                 if (!row[0]){
 315                         ERROR("rlm_sql (%s): No row id found on pass %d",inst->config->xlat_name,i);
 316                         continue;
 317                 }
 318                 if (!row[1]){
 319                         ERROR("rlm_sql (%s): No nasname found for row %s",inst->config->xlat_name,row[0]);
 320                         continue;
 321                 }
 322                 if (!row[2]){
 323                         ERROR("rlm_sql (%s): No short name found for row %s",inst->config->xlat_name,row[0]);
 324                         continue;
 325                 }
 326                 if (!row[4]){
 327                         ERROR("rlm_sql (%s): No secret found for row %s",inst->config->xlat_name,row[0]);
 328                         continue;
 329                 }
 330
 331                 if (((inst->module->sql_num_fields)(handle, inst->config) > 5) && (row[5] != NULL) && *row[5]) {
 332                         server = row[5];
 333                 }
 334
 335                 DEBUG("rlm_sql (%s): Adding client %s (%s) to %s clients list",
 336                       inst->config->xlat_name,
 337                       row[1], row[2], server ? server : "global");
 338
 339                 /* FIXME: We should really pass a proper ctx */
 340                 c = client_afrom_query(NULL,
 341                                       row[1],   /* identifier */
 342                                       row[4],   /* secret */
 343                                       row[2],   /* shortname */
 344                                       row[3],   /* type */
 345                                       server,   /* server */
 346                                       false);   /* require message authenticator */
 347                 if (!c) {
 348                         continue;
 349                 }
 350
 351                 if (!client_add(NULL, c)) {
 352                         WARN("Failed to add client, possible duplicate?");
 353
 354                         client_free(c);
 355                         continue;
 356                 }
 357
 358                 DEBUG("rlm_sql (%s): Client \"%s\" (%s) added", c->longname, c->shortname,
 359                       inst->config->xlat_name);
 360         }
 361
 362         (inst->module->sql_finish_select_query)(handle, inst->config);
 363         fr_connection_release(inst->pool, handle);
 364
 365         return 0;
 366 }
 367
 368
 369 /*
 370  *      Translate the SQL queries.
 371  */
 372 static size_t sql_escape_func(UNUSED REQUEST *request, char *out, size_t outlen,
 373                               char const *in, void *arg)
 374 {
 375         rlm_sql_t *inst = arg;
 376         size_t len = 0;
 377
 378         while (in[0]) {
 379                 size_t utf8_len;
 380
 381                 /*
 382                  *      Allow all multi-byte UTF8 characters.
 383                  */
 384                 utf8_len = fr_utf8_char((uint8_t const *) in);
 385                 if (utf8_len > 1) {
 386                         if (outlen <= utf8_len) break;
 387
 388                         memcpy(out, in, utf8_len);
 389                         in += utf8_len;
 390                         out += utf8_len;
 391
 392                         outlen -= utf8_len;
 393                         len += utf8_len;
 394                         continue;
 395                 }
 396
 397                 /*
 398                  *      Because we register our own escape function
 399                  *      we're now responsible for escaping all special
 400                  *      chars in an xlat expansion or attribute value.
 401                  */
 402                 switch (in[0]) {
 403                 case '\n':
 404                         if (outlen <= 2) break;
 405                         out[0] = '\'';
 406                         out[1] = 'n';
 407
 408                         in++;
 409                         out += 2;
 410                         outlen -= 2;
 411                         len += 2;
 412                         break;
 413
 414                 case '\r':
 415                         if (outlen <= 2) break;
 416                         out[0] = '\'';
 417                         out[1] = 'r';
 418
 419                         in++;
 420                         out += 2;
 421                         outlen -= 2;
 422                         len += 2;
 423                         break;
 424
 425                 case '\t':
 426                         if (outlen <= 2) break;
 427                         out[0] = '\'';
 428                         out[1] = 't';
 429
 430                         in++;
 431                         out += 2;
 432                         outlen -= 2;
 433                         len += 2;
 434                         break;
 435                 }
 436
 437                 /*
 438                  *      Non-printable characters get replaced with their
 439                  *      mime-encoded equivalents.
 440                  */
 441                 if ((in[0] < 32) ||
 442                     strchr(inst->config->allowed_chars, *in) == NULL) {
 443                         /*
 444                          *      Only 3 or less bytes available.
 445                          */
 446                         if (outlen <= 3) {
 447                                 break;
 448                         }
 449
 450                         snprintf(out, outlen, "=%02X", (unsigned char) in[0]);
 451                         in++;
 452                         out += 3;
 453                         outlen -= 3;
 454                         len += 3;
 455                         continue;
 456                 }
 457
 458                 /*
 459                  *      Only one byte left.
 460                  */
 461                 if (outlen <= 1) {
 462                         break;
 463                 }
 464
 465                 /*
 466                  *      Allowed character.
 467                  */
 468                 *out = *in;
 469                 out++;
 470                 in++;
 471                 outlen--;
 472                 len++;
 473         }
 474         *out = '\0';
 475         return len;
 476 }
 477
 478 /*
 479  *      Set the SQL user name.
 480  *
 481  *      We don't call the escape function here. The resulting string
 482  *      will be escaped later in the queries xlat so we don't need to
 483  *      escape it twice. (it will make things wrong if we have an
 484  *      escape candidate character in the username)
 485  */
 486 int sql_set_user(rlm_sql_t *inst, REQUEST *request, char const *username)
 487 {
 488         char *expanded = NULL;
 489         VALUE_PAIR *vp = NULL;
 490         char const *sqluser;
 491         ssize_t len;
 492
 493         rad_assert(request->packet != NULL);
 494
 495         if (username != NULL) {
 496                 sqluser = username;
 497         } else if (inst->config->query_user[0] != '\0') {
 498                 sqluser = inst->config->query_user;
 499         } else {
 500                 return 0;
 501         }
 502
 503         len = radius_axlat(&expanded, request, sqluser, NULL, NULL);
 504         if (len < 0) {
 505                 return -1;
 506         }
 507
 508         vp = pairalloc(request->packet, inst->sql_user);
 509         if (!vp) {
 510                 talloc_free(expanded);
 511                 return -1;
 512         }
 513
 514         pairstrsteal(vp, expanded);
 515         RDEBUG2("SQL-User-Name set to '%s'", vp->vp_strvalue);
 516         vp->op = T_OP_SET;
 517         radius_pairmove(request, &request->packet->vps, vp, false);     /* needs to be pair move else op is not respected */
 518
 519         return 0;
 520 }
 521
 522 /*
 523  *      Do a set/unset user, so it's a bit clearer what's going on.
 524  */
 525 #define sql_unset_user(_i, _r) pairdelete(&_r->packet->vps, _i->sql_user->attr, _i->sql_user->vendor, TAG_ANY)
 526
 527 static int sql_get_grouplist(rlm_sql_t *inst, rlm_sql_handle_t **handle, REQUEST *request,
 528                              rlm_sql_grouplist_t **phead)
 529 {
 530         char    *expanded = NULL;
 531         int     num_groups = 0;
 532         rlm_sql_row_t row;
 533         rlm_sql_grouplist_t *entry;
 534         int ret;
 535
 536         /* NOTE: sql_set_user should have been run before calling this function */
 537
 538         entry = *phead = NULL;
 539
 540         if (!inst->config->groupmemb_query || (inst->config->groupmemb_query[0] == 0)) {
 541                 return 0;
 542         }
 543
 544         if (radius_axlat(&expanded, request, inst->config->groupmemb_query, sql_escape_func, inst) < 0) {
 545                 return -1;
 546         }
 547
 548         ret = rlm_sql_select_query(handle, inst, expanded);
 549         talloc_free(expanded);
 550         if (ret != RLM_SQL_OK) return -1;
 551
 552         while (rlm_sql_fetch_row(handle, inst) == 0) {
 553                 row = (*handle)->row;
 554                 if (!row)
 555                         break;
 556
 557                 if (!row[0]){
 558                         RDEBUG("row[0] returned NULL");
 559                         (inst->module->sql_finish_select_query)(*handle, inst->config);
 560                         talloc_free(entry);
 561                         return -1;
 562                 }
 563
 564                 if (!*phead) {
 565                         *phead = talloc_zero(*handle, rlm_sql_grouplist_t);
 566                         entry = *phead;
 567                 } else {
 568                         entry->next = talloc_zero(*phead, rlm_sql_grouplist_t);
 569                         entry = entry->next;
 570                 }
 571                 entry->next = NULL;
 572                 entry->name = talloc_typed_strdup(entry, row[0]);
 573
 574                 num_groups++;
 575         }
 576
 577         (inst->module->sql_finish_select_query)(*handle, 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 CC_HINT(nonnull (1, 2, 4)) sql_groupcmp(void *instance, REQUEST *request, UNUSED VALUE_PAIR *request_vp,
 591                                                    VALUE_PAIR *check, UNUSED VALUE_PAIR *check_pairs,
 592                                                    UNUSED VALUE_PAIR **reply_pairs)
 593 {
 594         rlm_sql_handle_t *handle;
 595         rlm_sql_t *inst = instance;
 596         rlm_sql_grouplist_t *head, *entry;
 597
 598         RDEBUG("sql_groupcmp");
 599
 600         if (check->length == 0){
 601                 RDEBUG("sql_groupcmp: Illegal group name");
 602                 return 1;
 603         }
 604
 605         /*
 606          *      Set, escape, and check the user attr here
 607          */
 608         if (sql_set_user(inst, request, NULL) < 0)
 609                 return 1;
 610
 611         /*
 612          *      Get a socket for this lookup
 613          */
 614         handle = fr_connection_get(inst->pool);
 615         if (!handle) {
 616                 return 1;
 617         }
 618
 619         /*
 620          *      Get the list of groups this user is a member of
 621          */
 622         if (sql_get_grouplist(inst, &handle, request, &head) < 0) {
 623                 REDEBUG("Error getting group membership");
 624                 fr_connection_release(inst->pool, handle);
 625                 return 1;
 626         }
 627
 628         for (entry = head; entry != NULL; entry = entry->next) {
 629                 if (strcmp(entry->name, check->vp_strvalue) == 0){
 630                         RDEBUG("sql_groupcmp finished: User is a member of group %s",
 631                                check->vp_strvalue);
 632                         talloc_free(head);
 633                         fr_connection_release(inst->pool, handle);
 634                         return 0;
 635                 }
 636         }
 637
 638         /* Free the grouplist */
 639         talloc_free(head);
 640         fr_connection_release(inst->pool, handle);
 641
 642         RDEBUG("sql_groupcmp finished: User is NOT a member of group %s", check->vp_strvalue);
 643
 644         return 1;
 645 }
 646
 647 static rlm_rcode_t rlm_sql_process_groups(rlm_sql_t *inst, REQUEST *request, rlm_sql_handle_t **handle,
 648                                           sql_fall_through_t *do_fall_through)
 649 {
 650         rlm_rcode_t             rcode = RLM_MODULE_NOOP;
 651         VALUE_PAIR              *check_tmp = NULL, *reply_tmp = NULL, *sql_group = NULL;
 652         rlm_sql_grouplist_t     *head = NULL, *entry = NULL;
 653
 654         char                    *expanded = NULL;
 655         int                     rows;
 656
 657         rad_assert(request->packet != NULL);
 658
 659         /*
 660          *      Get the list of groups this user is a member of
 661          */
 662         rows = sql_get_grouplist(inst, handle, request, &head);
 663         if (rows < 0) {
 664                 REDEBUG("Error retrieving group list");
 665
 666                 return RLM_MODULE_FAIL;
 667         }
 668         if (rows == 0) {
 669                 RDEBUG2("User not found in any groups");
 670                 rcode = RLM_MODULE_NOTFOUND;
 671                 goto finish;
 672         }
 673         rad_assert(head);
 674
 675         RDEBUG2("User found in the group table");
 676
 677         entry = head;
 678         do {
 679                 /*
 680                  *      Add the Sql-Group attribute to the request list so we know
 681                  *      which group we're retrieving attributes for
 682                  */
 683                 sql_group = pairmake_packet("Sql-Group", entry->name, T_OP_EQ);
 684                 if (!sql_group) {
 685                         REDEBUG("Error creating Sql-Group attribute");
 686                         rcode = RLM_MODULE_FAIL;
 687                         goto finish;
 688                 }
 689
 690                 if (inst->config->authorize_group_check_query && *inst->config->authorize_group_check_query) {
 691                         vp_cursor_t cursor;
 692                         VALUE_PAIR *vp;
 693
 694                         /*
 695                          *      Expand the group query
 696                          */
 697                         if (radius_axlat(&expanded, request, inst->config->authorize_group_check_query,
 698                                          sql_escape_func, inst) < 0) {
 699                                 REDEBUG("Error generating query");
 700                                 rcode = RLM_MODULE_FAIL;
 701                                 goto finish;
 702                         }
 703
 704                         rows = sql_getvpdata(request, inst, request, handle, &check_tmp, expanded);
 705                         TALLOC_FREE(expanded);
 706                         if (rows < 0) {
 707                                 REDEBUG("Error retrieving check pairs for group %s", entry->name);
 708                                 rcode = RLM_MODULE_FAIL;
 709                                 goto finish;
 710                         }
 711
 712                         /*
 713                          *      If we got check rows we need to process them before we decide to process the reply rows
 714                          */
 715                         if ((rows > 0) &&
 716                             (paircompare(request, request->packet->vps, check_tmp, &request->reply->vps) != 0)) {
 717                                 pairfree(&check_tmp);
 718                                 pairdelete(&request->packet->vps, PW_SQL_GROUP, 0, TAG_ANY);
 719
 720                                 continue;
 721                         }
 722
 723                         RDEBUG2("Group \"%s\": Conditional check items matched", entry->name);
 724                         rcode = RLM_MODULE_OK;
 725
 726                         RDEBUG2("Group \"%s\": Merging assignment check items", entry->name);
 727                         RINDENT();
 728                         for (vp = fr_cursor_init(&cursor, &check_tmp);
 729                              vp;
 730                              vp = fr_cursor_next(&cursor)) {
 731                                 if (!fr_assignment_op[vp->op]) continue;
 732
 733                                 rdebug_pair(2, request, vp);
 734                         }
 735                         REXDENT();
 736                         radius_pairmove(request, &request->config_items, check_tmp, true);
 737                         check_tmp = NULL;
 738                 }
 739
 740                 if (inst->config->authorize_group_reply_query && *inst->config->authorize_group_reply_query) {
 741                         /*
 742                          *      Now get the reply pairs since the paircompare matched
 743                          */
 744                         if (radius_axlat(&expanded, request, inst->config->authorize_group_reply_query,
 745                                          sql_escape_func, inst) < 0) {
 746                                 REDEBUG("Error generating query");
 747                                 rcode = RLM_MODULE_FAIL;
 748                                 goto finish;
 749                         }
 750
 751                         rows = sql_getvpdata(request->reply, inst, request, handle, &reply_tmp, expanded);
 752                         TALLOC_FREE(expanded);
 753                         if (rows < 0) {
 754                                 REDEBUG("Error retrieving reply pairs for group %s", entry->name);
 755                                 rcode = RLM_MODULE_FAIL;
 756                                 goto finish;
 757                         }
 758                         *do_fall_through = fall_through(reply_tmp);
 759
 760                         RDEBUG2("Group \"%s\": Merging reply items", entry->name);
 761                         rcode = RLM_MODULE_OK;
 762
 763                         rdebug_pair_list(L_DBG_LVL_2, request, reply_tmp);
 764
 765                         radius_pairmove(request, &request->reply->vps, reply_tmp, true);
 766                         reply_tmp = NULL;
 767                 }
 768
 769                 pairdelete(&request->packet->vps, PW_SQL_GROUP, 0, TAG_ANY);
 770                 entry = entry->next;
 771         } while (entry != NULL && (*do_fall_through == FALL_THROUGH_YES));
 772
 773 finish:
 774         talloc_free(head);
 775         pairdelete(&request->packet->vps, PW_SQL_GROUP, 0, TAG_ANY);
 776
 777         return rcode;
 778 }
 779
 780
 781 static int mod_detach(void *instance)
 782 {
 783         rlm_sql_t *inst = instance;
 784
 785         if (inst->pool) fr_connection_pool_delete(inst->pool);
 786
 787         /*
 788          *  We need to explicitly free all children, so if the driver
 789          *  parented any memory off the instance, their destructors
 790          *  run before we unload the bytecode for them.
 791          *
 792          *  If we don't do this, we get a SEGV deep inside the talloc code
 793          *  when it tries to call a destructor that no longer exists.
 794          */
 795         talloc_free_children(inst);
 796
 797         /*
 798          *  Decrements the reference count. The driver object won't be unloaded
 799          *  until all instances of rlm_sql that use it have been destroyed.
 800          */
 801         if (inst->handle) dlclose(inst->handle);
 802
 803         return 0;
 804 }
 805
 806 static int mod_instantiate(CONF_SECTION *conf, void *instance)
 807 {
 808         rlm_sql_t *inst = instance;
 809
 810         /*
 811          *      Hack...
 812          */
 813         inst->config = &inst->myconfig;
 814         inst->cs = conf;
 815
 816         inst->config->xlat_name = cf_section_name2(conf);
 817         if (!inst->config->xlat_name) {
 818                 inst->config->xlat_name = cf_section_name1(conf);
 819         } else {
 820                 char *group_name;
 821                 DICT_ATTR const *da;
 822                 ATTR_FLAGS flags;
 823
 824                 /*
 825                  *      Allocate room for <instance>-SQL-Group
 826                  */
 827                 group_name = talloc_typed_asprintf(inst, "%s-SQL-Group", inst->config->xlat_name);
 828                 DEBUG("rlm_sql (%s): Creating new attribute %s",
 829                       inst->config->xlat_name, group_name);
 830
 831                 memset(&flags, 0, sizeof(flags));
 832                 if (dict_addattr(group_name, -1, 0, PW_TYPE_STRING, flags) < 0) {
 833                         ERROR("rlm_sql (%s): Failed to create "
 834                                "attribute %s: %s", inst->config->xlat_name, group_name,
 835                                fr_strerror());
 836                         return -1;
 837                 }
 838
 839                 da = dict_attrbyname(group_name);
 840                 if (!da) {
 841                         ERROR("rlm_sql (%s): Failed to create "
 842                                "attribute %s", inst->config->xlat_name, group_name);
 843                         return -1;
 844                 }
 845
 846                 if (inst->config->groupmemb_query &&
 847                     inst->config->groupmemb_query[0]) {
 848                         DEBUG("rlm_sql (%s): Registering sql_groupcmp for %s",
 849                               inst->config->xlat_name, group_name);
 850                         paircompare_register(da, dict_attrbyvalue(PW_USER_NAME, 0),
 851                                              false, sql_groupcmp, inst);
 852                 }
 853         }
 854
 855         rad_assert(inst->config->xlat_name);
 856
 857         /*
 858          *      Complain if the strings exist, but are empty.
 859          */
 860 #define CHECK_STRING(_x) if (inst->config->_x && !inst->config->_x) WARN("rlm_sql (%s): " STRINGIFY(_x) " is empty.  Please delete it from the configuration", inst->config->xlat_name)
 861
 862         CHECK_STRING(authorize_check_query);
 863         CHECK_STRING(authorize_reply_query);
 864         CHECK_STRING(authorize_group_check_query);
 865         CHECK_STRING(authorize_group_reply_query);
 866
 867         /*
 868          *      This will always exist, as cf_section_parse_init()
 869          *      will create it if it doesn't exist.  However, the
 870          *      "reference" config item won't exist in an auto-created
 871          *      configuration.  So if that doesn't exist, we ignore
 872          *      the whole subsection.
 873          */
 874         inst->config->accounting.cs = cf_section_sub_find(conf, "accounting");
 875         inst->config->accounting.reference_cp = (cf_pair_find(inst->config->accounting.cs, "reference") != NULL);
 876
 877         inst->config->postauth.cs = cf_section_sub_find(conf, "post-auth");
 878         inst->config->postauth.reference_cp = (cf_pair_find(inst->config->postauth.cs, "reference") != NULL);
 879
 880         /*
 881          *      Cache the SQL-User-Name DICT_ATTR, so we can be slightly
 882          *      more efficient about creating SQL-User-Name attributes.
 883          */
 884         inst->sql_user = dict_attrbyname("SQL-User-Name");
 885         if (!inst->sql_user) {
 886                 return -1;
 887         }
 888
 889         /*
 890          *      Export these methods, too.  This avoids RTDL_GLOBAL.
 891          */
 892         inst->sql_set_user              = sql_set_user;
 893         inst->sql_escape_func           = sql_escape_func;
 894         inst->sql_query                 = rlm_sql_query;
 895         inst->sql_select_query          = rlm_sql_select_query;
 896         inst->sql_fetch_row             = rlm_sql_fetch_row;
 897
 898         /*
 899          *      Register the SQL xlat function
 900          */
 901         xlat_register(inst->config->xlat_name, sql_xlat, sql_escape_func, inst);
 902
 903         /*
 904          *      Sanity check for crazy people.
 905          */
 906         if (strncmp(inst->config->sql_driver_name, "rlm_sql_", 8) != 0) {
 907                 ERROR("rlm_sql (%s): \"%s\" is NOT an SQL driver!", inst->config->xlat_name, inst->config->sql_driver_name);
 908                 return -1;
 909         }
 910
 911         /*
 912          *      Load the appropriate driver for our database
 913          */
 914         inst->handle = lt_dlopenext(inst->config->sql_driver_name);
 915         if (!inst->handle) {
 916                 ERROR("Could not link driver %s: %s", inst->config->sql_driver_name, dlerror());
 917                 ERROR("Make sure it (and all its dependent libraries!) are in the search path of your system's ld");
 918                 return -1;
 919         }
 920
 921         inst->module = (rlm_sql_module_t *) dlsym(inst->handle,
 922                                                   inst->config->sql_driver_name);
 923         if (!inst->module) {
 924                 ERROR("Could not link symbol %s: %s", inst->config->sql_driver_name, dlerror());
 925                 return -1;
 926         }
 927
 928         if (inst->module->mod_instantiate) {
 929                 CONF_SECTION *cs;
 930                 char const *name;
 931
 932                 name = strrchr(inst->config->sql_driver_name, '_');
 933                 if (!name) {
 934                         name = inst->config->sql_driver_name;
 935                 } else {
 936                         name++;
 937                 }
 938
 939                 cs = cf_section_sub_find(conf, name);
 940                 if (!cs) {
 941                         cs = cf_section_alloc(conf, name, NULL);
 942                         if (!cs) {
 943                                 return -1;
 944                         }
 945                 }
 946
 947                 /*
 948                  *      It's up to the driver to register a destructor
 949                  */
 950                 if (inst->module->mod_instantiate(cs, inst->config) < 0) {
 951                         return -1;
 952                 }
 953         }
 954
 955         inst->lf = fr_logfile_init(inst);
 956         if (!inst->lf) {
 957                 cf_log_err_cs(conf, "Failed creating log file context");
 958                 return -1;
 959         }
 960
 961         INFO("rlm_sql (%s): Driver %s (module %s) loaded and linked", inst->config->xlat_name,
 962              inst->config->sql_driver_name, inst->module->name);
 963
 964         /*
 965          *      Initialise the connection pool for this instance
 966          */
 967         INFO("rlm_sql (%s): Attempting to connect to database \"%s\"", inst->config->xlat_name, inst->config->sql_db);
 968
 969         inst->pool = fr_connection_pool_module_init(inst->cs, inst, mod_conn_create, NULL, NULL);
 970         if (!inst->pool) return -1;
 971
 972         if (inst->config->groupmemb_query &&
 973             inst->config->groupmemb_query[0]) {
 974                 paircompare_register(dict_attrbyvalue(PW_SQL_GROUP, 0),
 975                                 dict_attrbyvalue(PW_USER_NAME, 0), false, sql_groupcmp, inst);
 976         }
 977
 978         if (inst->config->do_clients) {
 979                 if (generate_sql_clients(inst) == -1){
 980                         ERROR("Failed to load clients from SQL");
 981                         return -1;
 982                 }
 983         }
 984
 985         return RLM_MODULE_OK;
 986 }
 987
 988
 989 static rlm_rcode_t CC_HINT(nonnull) mod_authorize(void *instance, REQUEST *request)
 990 {
 991         rlm_rcode_t rcode = RLM_MODULE_NOOP;
 992
 993         rlm_sql_t *inst = instance;
 994         rlm_sql_handle_t  *handle;
 995
 996         VALUE_PAIR *check_tmp = NULL;
 997         VALUE_PAIR *reply_tmp = NULL;
 998         VALUE_PAIR *user_profile = NULL;
 999
1000         bool    user_found = false;
1001
1002         sql_fall_through_t do_fall_through = FALL_THROUGH_DEFAULT;
1003
1004         int     rows;
1005
1006         char    *expanded = NULL;
1007
1008         rad_assert(request->packet != NULL);
1009         rad_assert(request->reply != NULL);
1010
1011         if (!inst->config->authorize_check_query && !inst->config->authorize_reply_query &&
1012             !inst->config->read_groups && !inst->config->read_profiles) {
1013                 RWDEBUG("No authorization checks configured, returning noop");
1014
1015                 return RLM_MODULE_NOOP;
1016         }
1017
1018         /*
1019          *      Set, escape, and check the user attr here
1020          */
1021         if (sql_set_user(inst, request, NULL) < 0) {
1022                 return RLM_MODULE_FAIL;
1023         }
1024
1025         /*
1026          *      Reserve a socket
1027          *
1028          *      After this point use goto error or goto release to cleanup socket temporary pairlists and
1029          *      temporary attributes.
1030          */
1031         handle = fr_connection_get(inst->pool);
1032         if (!handle) {
1033                 rcode = RLM_MODULE_FAIL;
1034                 goto error;
1035         }
1036
1037         /*
1038          *      Query the check table to find any conditions associated with this user/realm/whatever...
1039          */
1040         if (inst->config->authorize_check_query && *inst->config->authorize_check_query) {
1041                 vp_cursor_t cursor;
1042                 VALUE_PAIR *vp;
1043
1044                 if (radius_axlat(&expanded, request, inst->config->authorize_check_query,
1045                                  sql_escape_func, inst) < 0) {
1046                         REDEBUG("Error generating query");
1047                         rcode = RLM_MODULE_FAIL;
1048                         goto error;
1049                 }
1050
1051                 rows = sql_getvpdata(request, inst, request, &handle, &check_tmp, expanded);
1052                 TALLOC_FREE(expanded);
1053                 if (rows < 0) {
1054                         REDEBUG("SQL query error getting check attributes");
1055                         rcode = RLM_MODULE_FAIL;
1056                         goto error;
1057                 }
1058
1059                 if (rows == 0) goto skipreply;  /* Don't need to free VPs we don't have */
1060
1061                 /*
1062                  *      Only do this if *some* check pairs were returned
1063                  */
1064                 RDEBUG2("User found in radcheck table");
1065                 user_found = true;
1066                 if (paircompare(request, request->packet->vps, check_tmp, &request->reply->vps) != 0) {
1067                         pairfree(&check_tmp);
1068                         check_tmp = NULL;
1069                         goto skipreply;
1070                 }
1071
1072                 RDEBUG2("Conditional check items matched, merging assignment check items");
1073                 RINDENT();
1074                 for (vp = fr_cursor_init(&cursor, &check_tmp);
1075                      vp;
1076                      vp = fr_cursor_next(&cursor)) {
1077                         if (!fr_assignment_op[vp->op]) continue;
1078
1079                         rdebug_pair(2, request, vp);
1080                 }
1081                 REXDENT();
1082                 radius_pairmove(request, &request->config_items, check_tmp, true);
1083
1084                 rcode = RLM_MODULE_OK;
1085                 check_tmp = NULL;
1086         }
1087
1088         if (inst->config->authorize_reply_query && *inst->config->authorize_reply_query) {
1089                 /*
1090                  *      Now get the reply pairs since the paircompare matched
1091                  */
1092                 if (radius_axlat(&expanded, request, inst->config->authorize_reply_query,
1093                                  sql_escape_func, inst) < 0) {
1094                         REDEBUG("Error generating query");
1095                         rcode = RLM_MODULE_FAIL;
1096                         goto error;
1097                 }
1098
1099                 rows = sql_getvpdata(request->reply, inst, request, &handle, &reply_tmp, expanded);
1100                 TALLOC_FREE(expanded);
1101                 if (rows < 0) {
1102                         REDEBUG("SQL query error getting reply attributes");
1103                         rcode = RLM_MODULE_FAIL;
1104                         goto error;
1105                 }
1106
1107                 if (rows == 0) goto skipreply;
1108
1109                 do_fall_through = fall_through(reply_tmp);
1110
1111                 RDEBUG2("User found in radreply table, merging reply items");
1112                 user_found = true;
1113
1114                 rdebug_pair_list(L_DBG_LVL_2, request, reply_tmp);
1115
1116                 radius_pairmove(request, &request->reply->vps, reply_tmp, true);
1117
1118                 rcode = RLM_MODULE_OK;
1119                 reply_tmp = NULL;
1120         }
1121
1122 skipreply:
1123         if ((do_fall_through == FALL_THROUGH_YES) ||
1124             (inst->config->read_groups && (do_fall_through == FALL_THROUGH_DEFAULT))) {
1125                 rlm_rcode_t ret;
1126
1127                 RDEBUG3("... falling-through to group processing");
1128                 ret = rlm_sql_process_groups(inst, request, &handle, &do_fall_through);
1129                 switch (ret) {
1130                 /*
1131                  *      Nothing bad happened, continue...
1132                  */
1133                 case RLM_MODULE_UPDATED:
1134                         rcode = RLM_MODULE_UPDATED;
1135                         /* FALL-THROUGH */
1136                 case RLM_MODULE_OK:
1137                         if (rcode != RLM_MODULE_UPDATED) {
1138                                 rcode = RLM_MODULE_OK;
1139                         }
1140                         /* FALL-THROUGH */
1141                 case RLM_MODULE_NOOP:
1142                         user_found = true;
1143                         break;
1144
1145                 case RLM_MODULE_NOTFOUND:
1146                         break;
1147
1148                 default:
1149                         rcode = ret;
1150                         goto release;
1151                 }
1152         }
1153
1154         /*
1155          *      Repeat the above process with the default profile or User-Profile
1156          */
1157         if ((do_fall_through == FALL_THROUGH_YES) ||
1158             (inst->config->read_profiles && (do_fall_through == FALL_THROUGH_DEFAULT))) {
1159                 rlm_rcode_t ret;
1160
1161                 /*
1162                  *  Check for a default_profile or for a User-Profile.
1163                  */
1164                 RDEBUG3("... falling-through to profile processing");
1165                 user_profile = pairfind(request->config_items, PW_USER_PROFILE, 0, TAG_ANY);
1166
1167                 char const *profile = user_profile ?
1168                                       user_profile->vp_strvalue :
1169                                       inst->config->default_profile;
1170
1171                 if (!profile || !*profile) {
1172                         goto release;
1173                 }
1174
1175                 RDEBUG2("Checking profile %s", profile);
1176
1177                 if (sql_set_user(inst, request, profile) < 0) {
1178                         REDEBUG("Error setting profile");
1179                         rcode = RLM_MODULE_FAIL;
1180                         goto error;
1181                 }
1182
1183                 ret = rlm_sql_process_groups(inst, request, &handle, &do_fall_through);
1184                 switch (ret) {
1185                 /*
1186                  *      Nothing bad happened, continue...
1187                  */
1188                 case RLM_MODULE_UPDATED:
1189                         rcode = RLM_MODULE_UPDATED;
1190                         /* FALL-THROUGH */
1191                 case RLM_MODULE_OK:
1192                         if (rcode != RLM_MODULE_UPDATED) {
1193                                 rcode = RLM_MODULE_OK;
1194                         }
1195                         /* FALL-THROUGH */
1196                 case RLM_MODULE_NOOP:
1197                         user_found = true;
1198                         break;
1199
1200                 case RLM_MODULE_NOTFOUND:
1201                         break;
1202
1203                 default:
1204                         rcode = ret;
1205                         goto release;
1206                 }
1207         }
1208
1209         /*
1210          *      At this point the key (user) hasn't be found in the check table, the reply table
1211          *      or the group mapping table, and there was no matching profile.
1212          */
1213 release:
1214         if (!user_found) {
1215                 rcode = RLM_MODULE_NOTFOUND;
1216         }
1217
1218         fr_connection_release(inst->pool, handle);
1219         sql_unset_user(inst, request);
1220
1221         return rcode;
1222
1223 error:
1224         pairfree(&check_tmp);
1225         pairfree(&reply_tmp);
1226         sql_unset_user(inst, request);
1227
1228         fr_connection_release(inst->pool, handle);
1229
1230         return rcode;
1231 }
1232
1233 /*
1234  *      Generic function for failing between a bunch of queries.
1235  *
1236  *      Uses the same principle as rlm_linelog, expanding the 'reference' config
1237  *      item using xlat to figure out what query it should execute.
1238  *
1239  *      If the reference matches multiple config items, and a query fails or
1240  *      doesn't update any rows, the next matching config item is used.
1241  *
1242  */
1243 static int acct_redundant(rlm_sql_t *inst, REQUEST *request, sql_acct_section_t *section)
1244 {
1245         rlm_rcode_t             rcode = RLM_MODULE_OK;
1246
1247         rlm_sql_handle_t        *handle = NULL;
1248         int                     sql_ret;
1249         int                     numaffected = 0;
1250
1251         CONF_ITEM               *item;
1252         CONF_PAIR               *pair;
1253         char const              *attr = NULL;
1254         char const              *value;
1255
1256         char                    path[MAX_STRING_LEN];
1257         char                    *p = path;
1258         char                    *expanded = NULL;
1259
1260         rad_assert(section);
1261
1262         if (section->reference[0] != '.') {
1263                 *p++ = '.';
1264         }
1265
1266         if (radius_xlat(p, sizeof(path) - (p - path), request, section->reference, NULL, NULL) < 0) {
1267                 rcode = RLM_MODULE_FAIL;
1268
1269                 goto finish;
1270         }
1271
1272         item = cf_reference_item(NULL, section->cs, path);
1273         if (!item) {
1274                 rcode = RLM_MODULE_FAIL;
1275
1276                 goto finish;
1277         }
1278
1279         if (cf_item_is_section(item)){
1280                 REDEBUG("Sections are not supported as references");
1281                 rcode = RLM_MODULE_FAIL;
1282
1283                 goto finish;
1284         }
1285
1286         pair = cf_itemtopair(item);
1287         attr = cf_pair_attr(pair);
1288
1289         RDEBUG2("Using query template '%s'", attr);
1290
1291         handle = fr_connection_get(inst->pool);
1292         if (!handle) {
1293                 rcode = RLM_MODULE_FAIL;
1294
1295                 goto finish;
1296         }
1297
1298         sql_set_user(inst, request, NULL);
1299
1300         while (true) {
1301                 value = cf_pair_value(pair);
1302                 if (!value) {
1303                         RDEBUG("Ignoring null query");
1304                         rcode = RLM_MODULE_NOOP;
1305
1306                         goto finish;
1307                 }
1308
1309                 if (radius_axlat(&expanded, request, value, sql_escape_func, inst) < 0) {
1310                         rcode = RLM_MODULE_FAIL;
1311
1312                         goto finish;
1313                 }
1314
1315                 if (!*expanded) {
1316                         RDEBUG("Ignoring null query");
1317                         rcode = RLM_MODULE_NOOP;
1318                         talloc_free(expanded);
1319
1320                         goto finish;
1321                 }
1322
1323                 rlm_sql_query_log(inst, request, section, expanded);
1324
1325                 /*
1326                  *  If rlm_sql_query cannot use the socket it'll try and
1327                  *  reconnect. Reconnecting will automatically release
1328                  *  the current socket, and try to select a new one.
1329                  *
1330                  *  If we get RLM_SQL_RECONNECT it means all connections in the pool
1331                  *  were exhausted, and we couldn't create a new connection,
1332                  *  so we do not need to call fr_connection_release.
1333                  */
1334                 sql_ret = rlm_sql_query(&handle, inst, expanded);
1335                 TALLOC_FREE(expanded);
1336                 if (sql_ret == RLM_SQL_RECONNECT) {
1337                         rcode = RLM_MODULE_FAIL;
1338                         goto finish;
1339                 }
1340                 rad_assert(handle);
1341
1342                 /*
1343                  *  Assume all other errors are incidental, and just meant our
1344                  *  operation failed and its not a client or SQL syntax error.
1345                  *
1346                  *  @fixme We should actually be able to distinguish between key
1347                  *  constraint violations (which we expect) and other errors.
1348                  */
1349                 if (sql_ret == RLM_SQL_OK) {
1350                         numaffected = (inst->module->sql_affected_rows)(handle, inst->config);
1351                         if (numaffected > 0) {
1352                                 break;  /* A query succeeded, were done! */
1353                         }
1354
1355                         RDEBUG("No records updated");
1356                 }
1357
1358                 (inst->module->sql_finish_query)(handle, inst->config);
1359
1360                 /*
1361                  *  We assume all entries with the same name form a redundant
1362                  *  set of queries.
1363                  */
1364                 pair = cf_pair_find_next(section->cs, pair, attr);
1365
1366                 if (!pair) {
1367                         RDEBUG("No additional queries configured");
1368                         rcode = RLM_MODULE_NOOP;
1369
1370                         goto finish;
1371                 }
1372
1373                 RDEBUG("Trying next query...");
1374         }
1375
1376         (inst->module->sql_finish_query)(handle, inst->config);
1377
1378 finish:
1379         talloc_free(expanded);
1380         fr_connection_release(inst->pool, handle);
1381         sql_unset_user(inst, request);
1382
1383         return rcode;
1384 }
1385
1386 #ifdef WITH_ACCOUNTING
1387
1388 /*
1389  *      Accounting: Insert or update session data in our sql table
1390  */
1391 static rlm_rcode_t CC_HINT(nonnull) mod_accounting(void *instance, REQUEST * request) {
1392         rlm_sql_t *inst = instance;
1393
1394         if (inst->config->accounting.reference_cp) {
1395                 return acct_redundant(inst, request, &inst->config->accounting);
1396         }
1397
1398         return RLM_MODULE_NOOP;
1399 }
1400
1401 #endif
1402
1403 #ifdef WITH_SESSION_MGMT
1404 /*
1405  *      See if a user is already logged in. Sets request->simul_count to the
1406  *      current session count for this user.
1407  *
1408  *      Check twice. If on the first pass the user exceeds his
1409  *      max. number of logins, do a second pass and validate all
1410  *      logins by querying the terminal server (using eg. SNMP).
1411  */
1412
1413 static rlm_rcode_t CC_HINT(nonnull) mod_checksimul(void *instance, REQUEST * request) {
1414         rlm_rcode_t             rcode = RLM_MODULE_OK;
1415         rlm_sql_handle_t        *handle = NULL;
1416         rlm_sql_t               *inst = instance;
1417         rlm_sql_row_t           row;
1418         int                     check = 0;
1419         uint32_t                ipno = 0;
1420         char const              *call_num = NULL;
1421         VALUE_PAIR              *vp;
1422         int                     ret;
1423         uint32_t                nas_addr = 0;
1424         uint32_t                nas_port = 0;
1425
1426         char                    *expanded = NULL;
1427
1428         /* If simul_count_query is not defined, we don't do any checking */
1429         if (!inst->config->simul_count_query || (inst->config->simul_count_query[0] == '\0')) {
1430                 return RLM_MODULE_NOOP;
1431         }
1432
1433         if((!request->username) || (request->username->length == '\0')) {
1434                 REDEBUG("Zero Length username not permitted");
1435
1436                 return RLM_MODULE_INVALID;
1437         }
1438
1439
1440         if(sql_set_user(inst, request, NULL) < 0) {
1441                 return RLM_MODULE_FAIL;
1442         }
1443
1444         if (radius_axlat(&expanded, request, inst->config->simul_count_query, sql_escape_func, inst) < 0) {
1445                 sql_unset_user(inst, request);
1446                 return RLM_MODULE_FAIL;
1447         }
1448
1449         /* initialize the sql socket */
1450         handle = fr_connection_get(inst->pool);
1451         if (!handle) {
1452                 talloc_free(expanded);
1453                 sql_unset_user(inst, request);
1454                 return RLM_MODULE_FAIL;
1455         }
1456
1457         if (rlm_sql_select_query(&handle, inst, expanded) != RLM_SQL_OK) {
1458                 rcode = RLM_MODULE_FAIL;
1459                 goto finish;
1460         }
1461
1462         ret = rlm_sql_fetch_row(&handle, inst);
1463         if (ret != 0) {
1464                 rcode = RLM_MODULE_FAIL;
1465                 goto finish;
1466         }
1467
1468         row = handle->row;
1469         if (!row) {
1470                 rcode = RLM_MODULE_FAIL;
1471                 goto finish;
1472         }
1473
1474         request->simul_count = atoi(row[0]);
1475
1476         (inst->module->sql_finish_select_query)(handle, inst->config);
1477         TALLOC_FREE(expanded);
1478
1479         if (request->simul_count < request->simul_max) {
1480                 rcode = RLM_MODULE_OK;
1481                 goto finish;
1482         }
1483
1484         /*
1485          *      Looks like too many sessions, so let's start verifying
1486          *      them, unless told to rely on count query only.
1487          */
1488         if (!inst->config->simul_verify_query || (inst->config->simul_verify_query[0] == '\0')) {
1489                 rcode = RLM_MODULE_OK;
1490
1491                 goto finish;
1492         }
1493
1494         if (radius_axlat(&expanded, request, inst->config->simul_verify_query, sql_escape_func, inst) < 0) {
1495                 rcode = RLM_MODULE_FAIL;
1496
1497                 goto finish;
1498         }
1499
1500         if (rlm_sql_select_query(&handle, inst, expanded) != RLM_SQL_OK) goto finish;
1501
1502         /*
1503          *      Setup some stuff, like for MPP detection.
1504          */
1505         request->simul_count = 0;
1506
1507         if ((vp = pairfind(request->packet->vps, PW_FRAMED_IP_ADDRESS, 0, TAG_ANY)) != NULL) {
1508                 ipno = vp->vp_ipaddr;
1509         }
1510
1511         if ((vp = pairfind(request->packet->vps, PW_CALLING_STATION_ID, 0, TAG_ANY)) != NULL) {
1512                 call_num = vp->vp_strvalue;
1513         }
1514
1515         while (rlm_sql_fetch_row(&handle, inst) == 0) {
1516                 row = handle->row;
1517                 if (!row) {
1518                         break;
1519                 }
1520
1521                 if (!row[2]){
1522                         RDEBUG("Cannot zap stale entry. No username present in entry");
1523                         rcode = RLM_MODULE_FAIL;
1524
1525                         goto finish;
1526                 }
1527
1528                 if (!row[1]){
1529                         RDEBUG("Cannot zap stale entry. No session id in entry");
1530                         rcode = RLM_MODULE_FAIL;
1531
1532                         goto finish;
1533                 }
1534
1535                 if (row[3]) {
1536                         nas_addr = inet_addr(row[3]);
1537                 }
1538
1539                 if (row[4]) {
1540                         nas_port = atoi(row[4]);
1541                 }
1542
1543                 check = rad_check_ts(nas_addr, nas_port, row[2], row[1]);
1544                 if (check == 0) {
1545                         /*
1546                          *      Stale record - zap it.
1547                          */
1548                         if (inst->config->deletestalesessions == true) {
1549                                 uint32_t framed_addr = 0;
1550                                 char proto = 0;
1551                                 int sess_time = 0;
1552
1553                                 if (row[5])
1554                                         framed_addr = inet_addr(row[5]);
1555                                 if (row[7]){
1556                                         if (strcmp(row[7], "PPP") == 0)
1557                                                 proto = 'P';
1558                                         else if (strcmp(row[7], "SLIP") == 0)
1559                                                 proto = 'S';
1560                                 }
1561                                 if (row[8])
1562                                         sess_time = atoi(row[8]);
1563                                 session_zap(request, nas_addr, nas_port,
1564                                             row[2], row[1], framed_addr,
1565                                             proto, sess_time);
1566                         }
1567                 }
1568                 else if (check == 1) {
1569                         /*
1570                          *      User is still logged in.
1571                          */
1572                         ++request->simul_count;
1573
1574                         /*
1575                          *      Does it look like a MPP attempt?
1576                          */
1577                         if (row[5] && ipno && inet_addr(row[5]) == ipno) {
1578                                 request->simul_mpp = 2;
1579                         } else if (row[6] && call_num && !strncmp(row[6],call_num,16)) {
1580                                 request->simul_mpp = 2;
1581                         }
1582                 } else {
1583                         /*
1584                          *      Failed to check the terminal server for
1585                          *      duplicate logins: return an error.
1586                          */
1587                         REDEBUG("Failed to check the terminal server for user '%s'.", row[2]);
1588
1589                         rcode = RLM_MODULE_FAIL;
1590                         goto finish;
1591                 }
1592         }
1593
1594         finish:
1595
1596         (inst->module->sql_finish_select_query)(handle, inst->config);
1597         fr_connection_release(inst->pool, handle);
1598         talloc_free(expanded);
1599         sql_unset_user(inst, request);
1600
1601         /*
1602          *      The Auth module apparently looks at request->simul_count,
1603          *      not the return value of this module when deciding to deny
1604          *      a call for too many sessions.
1605          */
1606         return rcode;
1607 }
1608 #endif
1609
1610 /*
1611  *      Postauth: Write a record of the authentication attempt
1612  */
1613 static rlm_rcode_t CC_HINT(nonnull) mod_post_auth(void *instance, REQUEST * request) {
1614         rlm_sql_t *inst = instance;
1615
1616         if (inst->config->postauth.reference_cp) {
1617                 return acct_redundant(inst, request, &inst->config->postauth);
1618         }
1619
1620         return RLM_MODULE_NOOP;
1621 }
1622
1623 /*
1624  *      Execute postauth_query after authentication
1625  */
1626
1627
1628 /* globally exported name */
1629 module_t rlm_sql = {
1630         RLM_MODULE_INIT,
1631         "SQL",
1632         RLM_TYPE_THREAD_SAFE,   /* type: reserved */
1633         sizeof(rlm_sql_t),
1634         module_config,
1635         mod_instantiate,        /* instantiation */
1636         mod_detach,             /* detach */
1637         {
1638                 NULL,                   /* authentication */
1639                 mod_authorize,  /* authorization */
1640                 NULL,                   /* preaccounting */
1641 #ifdef WITH_ACCOUNTING
1642                 mod_accounting, /* accounting */
1643 #else
1644                 NULL,
1645 #endif
1646 #ifdef WITH_SESSION_MGMT
1647                 mod_checksimul, /* checksimul */
1648 #else
1649                 NULL,
1650 #endif
1651                 NULL,                   /* pre-proxy */
1652                 NULL,                   /* post-proxy */
1653                 mod_post_auth   /* post-auth */
1654         },
1655 };