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) return 0;
 541         if (radius_axlat(&expanded, request, inst->config->groupmemb_query, sql_escape_func, inst) < 0) return -1;
 542
 543         ret = rlm_sql_select_query(handle, inst, expanded);
 544         talloc_free(expanded);
 545         if (ret != RLM_SQL_OK) return -1;
 546
 547         while (rlm_sql_fetch_row(handle, inst) == 0) {
 548                 row = (*handle)->row;
 549                 if (!row)
 550                         break;
 551
 552                 if (!row[0]){
 553                         RDEBUG("row[0] returned NULL");
 554                         (inst->module->sql_finish_select_query)(*handle, inst->config);
 555                         talloc_free(entry);
 556                         return -1;
 557                 }
 558
 559                 if (!*phead) {
 560                         *phead = talloc_zero(*handle, rlm_sql_grouplist_t);
 561                         entry = *phead;
 562                 } else {
 563                         entry->next = talloc_zero(*phead, rlm_sql_grouplist_t);
 564                         entry = entry->next;
 565                 }
 566                 entry->next = NULL;
 567                 entry->name = talloc_typed_strdup(entry, row[0]);
 568
 569                 num_groups++;
 570         }
 571
 572         (inst->module->sql_finish_select_query)(*handle, inst->config);
 573
 574         return num_groups;
 575 }
 576
 577
 578 /*
 579  * sql groupcmp function. That way we can do group comparisons (in the users file for example)
 580  * with the group memberships reciding in sql
 581  * The group membership query should only return one element which is the username. The returned
 582  * username will then be checked with the passed check string.
 583  */
 584
 585 static int CC_HINT(nonnull (1, 2, 4)) sql_groupcmp(void *instance, REQUEST *request, UNUSED VALUE_PAIR *request_vp,
 586                                                    VALUE_PAIR *check, UNUSED VALUE_PAIR *check_pairs,
 587                                                    UNUSED VALUE_PAIR **reply_pairs)
 588 {
 589         rlm_sql_handle_t *handle;
 590         rlm_sql_t *inst = instance;
 591         rlm_sql_grouplist_t *head, *entry;
 592
 593         RDEBUG("sql_groupcmp");
 594
 595         if (check->length == 0){
 596                 RDEBUG("sql_groupcmp: Illegal group name");
 597                 return 1;
 598         }
 599
 600         /*
 601          *      Set, escape, and check the user attr here
 602          */
 603         if (sql_set_user(inst, request, NULL) < 0)
 604                 return 1;
 605
 606         /*
 607          *      Get a socket for this lookup
 608          */
 609         handle = fr_connection_get(inst->pool);
 610         if (!handle) {
 611                 return 1;
 612         }
 613
 614         /*
 615          *      Get the list of groups this user is a member of
 616          */
 617         if (sql_get_grouplist(inst, &handle, request, &head) < 0) {
 618                 REDEBUG("Error getting group membership");
 619                 fr_connection_release(inst->pool, handle);
 620                 return 1;
 621         }
 622
 623         for (entry = head; entry != NULL; entry = entry->next) {
 624                 if (strcmp(entry->name, check->vp_strvalue) == 0){
 625                         RDEBUG("sql_groupcmp finished: User is a member of group %s",
 626                                check->vp_strvalue);
 627                         talloc_free(head);
 628                         fr_connection_release(inst->pool, handle);
 629                         return 0;
 630                 }
 631         }
 632
 633         /* Free the grouplist */
 634         talloc_free(head);
 635         fr_connection_release(inst->pool, handle);
 636
 637         RDEBUG("sql_groupcmp finished: User is NOT a member of group %s", check->vp_strvalue);
 638
 639         return 1;
 640 }
 641
 642 static rlm_rcode_t rlm_sql_process_groups(rlm_sql_t *inst, REQUEST *request, rlm_sql_handle_t **handle,
 643                                           sql_fall_through_t *do_fall_through)
 644 {
 645         rlm_rcode_t             rcode = RLM_MODULE_NOOP;
 646         VALUE_PAIR              *check_tmp = NULL, *reply_tmp = NULL, *sql_group = NULL;
 647         rlm_sql_grouplist_t     *head = NULL, *entry = NULL;
 648
 649         char                    *expanded = NULL;
 650         int                     rows;
 651
 652         rad_assert(request->packet != NULL);
 653
 654         /*
 655          *      Get the list of groups this user is a member of
 656          */
 657         rows = sql_get_grouplist(inst, handle, request, &head);
 658         if (rows < 0) {
 659                 REDEBUG("Error retrieving group list");
 660
 661                 return RLM_MODULE_FAIL;
 662         }
 663         if (rows == 0) {
 664                 RDEBUG2("User not found in any groups");
 665                 rcode = RLM_MODULE_NOTFOUND;
 666                 goto finish;
 667         }
 668         rad_assert(head);
 669
 670         RDEBUG2("User found in the group table");
 671
 672         /*
 673          *      Add the Sql-Group attribute to the request list so we know
 674          *      which group we're retrieving attributes for
 675          */
 676         sql_group = pairmake_packet("Sql-Group", NULL, T_OP_EQ);
 677         if (!sql_group) {
 678                 REDEBUG("Error creating Sql-Group attribute");
 679                 rcode = RLM_MODULE_FAIL;
 680                 goto finish;
 681         }
 682
 683         entry = head;
 684         do {
 685         next:
 686                 pairstrcpy(sql_group, entry->name);
 687
 688                 if (inst->config->authorize_group_check_query && *inst->config->authorize_group_check_query) {
 689                         vp_cursor_t cursor;
 690                         VALUE_PAIR *vp;
 691
 692                         /*
 693                          *      Expand the group query
 694                          */
 695                         if (radius_axlat(&expanded, request, inst->config->authorize_group_check_query,
 696                                          sql_escape_func, inst) < 0) {
 697                                 REDEBUG("Error generating query");
 698                                 rcode = RLM_MODULE_FAIL;
 699                                 goto finish;
 700                         }
 701
 702                         rows = sql_getvpdata(request, inst, request, handle, &check_tmp, expanded);
 703                         TALLOC_FREE(expanded);
 704                         if (rows < 0) {
 705                                 REDEBUG("Error retrieving check pairs for group %s", entry->name);
 706                                 rcode = RLM_MODULE_FAIL;
 707                                 goto finish;
 708                         }
 709
 710                         /*
 711                          *      If we got check rows we need to process them before we decide to
 712                          *      process the reply rows
 713                          */
 714                         if ((rows > 0) &&
 715                             (paircompare(request, request->packet->vps, check_tmp, &request->reply->vps) != 0)) {
 716                                 pairfree(&check_tmp);
 717                                 entry = entry->next;
 718
 719                                 goto next;      /* != continue */
 720                         }
 721
 722                         RDEBUG2("Group \"%s\": Conditional check items matched", entry->name);
 723                         rcode = RLM_MODULE_OK;
 724
 725                         RDEBUG2("Group \"%s\": Merging assignment check items", entry->name);
 726                         RINDENT();
 727                         for (vp = fr_cursor_init(&cursor, &check_tmp);
 728                              vp;
 729                              vp = fr_cursor_next(&cursor)) {
 730                                 if (!fr_assignment_op[vp->op]) continue;
 731
 732                                 rdebug_pair(L_DBG_LVL_2, request, vp);
 733                         }
 734                         REXDENT();
 735                         radius_pairmove(request, &request->config_items, check_tmp, true);
 736                         check_tmp = NULL;
 737                 }
 738
 739                 if (inst->config->authorize_group_reply_query && *inst->config->authorize_group_reply_query) {
 740                         /*
 741                          *      Now get the reply pairs since the paircompare matched
 742                          */
 743                         if (radius_axlat(&expanded, request, inst->config->authorize_group_reply_query,
 744                                          sql_escape_func, inst) < 0) {
 745                                 REDEBUG("Error generating query");
 746                                 rcode = RLM_MODULE_FAIL;
 747                                 goto finish;
 748                         }
 749
 750                         rows = sql_getvpdata(request->reply, inst, request, handle, &reply_tmp, expanded);
 751                         TALLOC_FREE(expanded);
 752                         if (rows < 0) {
 753                                 REDEBUG("Error retrieving reply pairs for group %s", entry->name);
 754                                 rcode = RLM_MODULE_FAIL;
 755                                 goto finish;
 756                         }
 757                         *do_fall_through = fall_through(reply_tmp);
 758
 759                         RDEBUG2("Group \"%s\": Merging reply items", entry->name);
 760                         rcode = RLM_MODULE_OK;
 761
 762                         rdebug_pair_list(L_DBG_LVL_2, request, reply_tmp, NULL);
 763
 764                         radius_pairmove(request, &request->reply->vps, reply_tmp, true);
 765                         reply_tmp = NULL;
 766                 /*
 767                  *      If there's no reply query configured, then we assume
 768                  *      FALL_THROUGH_NO, which is the same as the users file if you
 769                  *      had no reply attributes.
 770                  */
 771                 } else {
 772                         *do_fall_through = FALL_THROUGH_DEFAULT;
 773                 }
 774
 775                 entry = entry->next;
 776         } while (entry != NULL && (*do_fall_through == FALL_THROUGH_YES));
 777
 778 finish:
 779         talloc_free(head);
 780         pairdelete(&request->packet->vps, PW_SQL_GROUP, 0, TAG_ANY);
 781
 782         return rcode;
 783 }
 784
 785
 786 static int mod_detach(void *instance)
 787 {
 788         rlm_sql_t *inst = instance;
 789
 790         if (inst->pool) fr_connection_pool_delete(inst->pool);
 791
 792         /*
 793          *  We need to explicitly free all children, so if the driver
 794          *  parented any memory off the instance, their destructors
 795          *  run before we unload the bytecode for them.
 796          *
 797          *  If we don't do this, we get a SEGV deep inside the talloc code
 798          *  when it tries to call a destructor that no longer exists.
 799          */
 800         talloc_free_children(inst);
 801
 802         /*
 803          *  Decrements the reference count. The driver object won't be unloaded
 804          *  until all instances of rlm_sql that use it have been destroyed.
 805          */
 806         if (inst->handle) dlclose(inst->handle);
 807
 808         return 0;
 809 }
 810
 811 static int mod_instantiate(CONF_SECTION *conf, void *instance)
 812 {
 813         rlm_sql_t *inst = instance;
 814
 815         /*
 816          *      Hack...
 817          */
 818         inst->config = &inst->myconfig;
 819         inst->cs = conf;
 820
 821         inst->config->xlat_name = cf_section_name2(conf);
 822         if (!inst->config->xlat_name) {
 823                 inst->config->xlat_name = cf_section_name1(conf);
 824         } else {
 825                 char *group_name;
 826                 DICT_ATTR const *da;
 827                 ATTR_FLAGS flags;
 828
 829                 /*
 830                  *      Allocate room for <instance>-SQL-Group
 831                  */
 832                 group_name = talloc_typed_asprintf(inst, "%s-SQL-Group", inst->config->xlat_name);
 833                 DEBUG("rlm_sql (%s): Creating new attribute %s",
 834                       inst->config->xlat_name, group_name);
 835
 836                 memset(&flags, 0, sizeof(flags));
 837                 if (dict_addattr(group_name, -1, 0, PW_TYPE_STRING, flags) < 0) {
 838                         ERROR("rlm_sql (%s): Failed to create "
 839                                "attribute %s: %s", inst->config->xlat_name, group_name,
 840                                fr_strerror());
 841                         return -1;
 842                 }
 843
 844                 da = dict_attrbyname(group_name);
 845                 if (!da) {
 846                         ERROR("rlm_sql (%s): Failed to create "
 847                                "attribute %s", inst->config->xlat_name, group_name);
 848                         return -1;
 849                 }
 850
 851                 if (inst->config->groupmemb_query &&
 852                     inst->config->groupmemb_query[0]) {
 853                         DEBUG("rlm_sql (%s): Registering sql_groupcmp for %s",
 854                               inst->config->xlat_name, group_name);
 855                         paircompare_register(da, dict_attrbyvalue(PW_USER_NAME, 0),
 856                                              false, sql_groupcmp, inst);
 857                 }
 858         }
 859
 860         rad_assert(inst->config->xlat_name);
 861
 862         /*
 863          *      Complain if the strings exist, but are empty.
 864          */
 865 #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)
 866
 867         CHECK_STRING(authorize_check_query);
 868         CHECK_STRING(authorize_reply_query);
 869         CHECK_STRING(authorize_group_check_query);
 870         CHECK_STRING(authorize_group_reply_query);
 871
 872         /*
 873          *      This will always exist, as cf_section_parse_init()
 874          *      will create it if it doesn't exist.  However, the
 875          *      "reference" config item won't exist in an auto-created
 876          *      configuration.  So if that doesn't exist, we ignore
 877          *      the whole subsection.
 878          */
 879         inst->config->accounting.cs = cf_section_sub_find(conf, "accounting");
 880         inst->config->accounting.reference_cp = (cf_pair_find(inst->config->accounting.cs, "reference") != NULL);
 881
 882         inst->config->postauth.cs = cf_section_sub_find(conf, "post-auth");
 883         inst->config->postauth.reference_cp = (cf_pair_find(inst->config->postauth.cs, "reference") != NULL);
 884
 885         /*
 886          *      Cache the SQL-User-Name DICT_ATTR, so we can be slightly
 887          *      more efficient about creating SQL-User-Name attributes.
 888          */
 889         inst->sql_user = dict_attrbyname("SQL-User-Name");
 890         if (!inst->sql_user) {
 891                 return -1;
 892         }
 893
 894         /*
 895          *      Export these methods, too.  This avoids RTDL_GLOBAL.
 896          */
 897         inst->sql_set_user              = sql_set_user;
 898         inst->sql_escape_func           = sql_escape_func;
 899         inst->sql_query                 = rlm_sql_query;
 900         inst->sql_select_query          = rlm_sql_select_query;
 901         inst->sql_fetch_row             = rlm_sql_fetch_row;
 902
 903         /*
 904          *      Register the SQL xlat function
 905          */
 906         xlat_register(inst->config->xlat_name, sql_xlat, sql_escape_func, inst);
 907
 908         /*
 909          *      Sanity check for crazy people.
 910          */
 911         if (strncmp(inst->config->sql_driver_name, "rlm_sql_", 8) != 0) {
 912                 ERROR("rlm_sql (%s): \"%s\" is NOT an SQL driver!", inst->config->xlat_name, inst->config->sql_driver_name);
 913                 return -1;
 914         }
 915
 916         /*
 917          *      Load the appropriate driver for our database
 918          */
 919         inst->handle = lt_dlopenext(inst->config->sql_driver_name);
 920         if (!inst->handle) {
 921                 ERROR("Could not link driver %s: %s", inst->config->sql_driver_name, dlerror());
 922                 ERROR("Make sure it (and all its dependent libraries!) are in the search path of your system's ld");
 923                 return -1;
 924         }
 925
 926         inst->module = (rlm_sql_module_t *) dlsym(inst->handle,
 927                                                   inst->config->sql_driver_name);
 928         if (!inst->module) {
 929                 ERROR("Could not link symbol %s: %s", inst->config->sql_driver_name, dlerror());
 930                 return -1;
 931         }
 932
 933         if (inst->module->mod_instantiate) {
 934                 CONF_SECTION *cs;
 935                 char const *name;
 936
 937                 name = strrchr(inst->config->sql_driver_name, '_');
 938                 if (!name) {
 939                         name = inst->config->sql_driver_name;
 940                 } else {
 941                         name++;
 942                 }
 943
 944                 cs = cf_section_sub_find(conf, name);
 945                 if (!cs) {
 946                         cs = cf_section_alloc(conf, name, NULL);
 947                         if (!cs) {
 948                                 return -1;
 949                         }
 950                 }
 951
 952                 /*
 953                  *      It's up to the driver to register a destructor
 954                  */
 955                 if (inst->module->mod_instantiate(cs, inst->config) < 0) {
 956                         return -1;
 957                 }
 958         }
 959
 960         inst->lf = fr_logfile_init(inst);
 961         if (!inst->lf) {
 962                 cf_log_err_cs(conf, "Failed creating log file context");
 963                 return -1;
 964         }
 965
 966         INFO("rlm_sql (%s): Driver %s (module %s) loaded and linked", inst->config->xlat_name,
 967              inst->config->sql_driver_name, inst->module->name);
 968
 969         /*
 970          *      Initialise the connection pool for this instance
 971          */
 972         INFO("rlm_sql (%s): Attempting to connect to database \"%s\"", inst->config->xlat_name, inst->config->sql_db);
 973
 974         inst->pool = fr_connection_pool_module_init(inst->cs, inst, mod_conn_create, NULL, NULL);
 975         if (!inst->pool) return -1;
 976
 977         if (inst->config->groupmemb_query &&
 978             inst->config->groupmemb_query[0]) {
 979                 paircompare_register(dict_attrbyvalue(PW_SQL_GROUP, 0),
 980                                 dict_attrbyvalue(PW_USER_NAME, 0), false, sql_groupcmp, inst);
 981         }
 982
 983         if (inst->config->do_clients) {
 984                 if (generate_sql_clients(inst) == -1){
 985                         ERROR("Failed to load clients from SQL");
 986                         return -1;
 987                 }
 988         }
 989
 990         return RLM_MODULE_OK;
 991 }
 992
 993
 994 static rlm_rcode_t CC_HINT(nonnull) mod_authorize(void *instance, REQUEST *request)
 995 {
 996         rlm_rcode_t rcode = RLM_MODULE_NOOP;
 997
 998         rlm_sql_t *inst = instance;
 999         rlm_sql_handle_t  *handle;
1000
1001         VALUE_PAIR *check_tmp = NULL;
1002         VALUE_PAIR *reply_tmp = NULL;
1003         VALUE_PAIR *user_profile = NULL;
1004
1005         bool    user_found = false;
1006
1007         sql_fall_through_t do_fall_through = FALL_THROUGH_DEFAULT;
1008
1009         int     rows;
1010
1011         char    *expanded = NULL;
1012
1013         rad_assert(request->packet != NULL);
1014         rad_assert(request->reply != NULL);
1015
1016         if (!inst->config->authorize_check_query && !inst->config->authorize_reply_query &&
1017             !inst->config->read_groups && !inst->config->read_profiles) {
1018                 RWDEBUG("No authorization checks configured, returning noop");
1019
1020                 return RLM_MODULE_NOOP;
1021         }
1022
1023         /*
1024          *      Set, escape, and check the user attr here
1025          */
1026         if (sql_set_user(inst, request, NULL) < 0) {
1027                 return RLM_MODULE_FAIL;
1028         }
1029
1030         /*
1031          *      Reserve a socket
1032          *
1033          *      After this point use goto error or goto release to cleanup socket temporary pairlists and
1034          *      temporary attributes.
1035          */
1036         handle = fr_connection_get(inst->pool);
1037         if (!handle) {
1038                 rcode = RLM_MODULE_FAIL;
1039                 goto error;
1040         }
1041
1042         /*
1043          *      Query the check table to find any conditions associated with this user/realm/whatever...
1044          */
1045         if (inst->config->authorize_check_query && *inst->config->authorize_check_query) {
1046                 vp_cursor_t cursor;
1047                 VALUE_PAIR *vp;
1048
1049                 if (radius_axlat(&expanded, request, inst->config->authorize_check_query,
1050                                  sql_escape_func, inst) < 0) {
1051                         REDEBUG("Error generating query");
1052                         rcode = RLM_MODULE_FAIL;
1053                         goto error;
1054                 }
1055
1056                 rows = sql_getvpdata(request, inst, request, &handle, &check_tmp, expanded);
1057                 TALLOC_FREE(expanded);
1058                 if (rows < 0) {
1059                         REDEBUG("SQL query error getting check attributes");
1060                         rcode = RLM_MODULE_FAIL;
1061                         goto error;
1062                 }
1063
1064                 if (rows == 0) goto skipreply;  /* Don't need to free VPs we don't have */
1065
1066                 /*
1067                  *      Only do this if *some* check pairs were returned
1068                  */
1069                 RDEBUG2("User found in radcheck table");
1070                 user_found = true;
1071                 if (paircompare(request, request->packet->vps, check_tmp, &request->reply->vps) != 0) {
1072                         pairfree(&check_tmp);
1073                         check_tmp = NULL;
1074                         goto skipreply;
1075                 }
1076
1077                 RDEBUG2("Conditional check items matched, merging assignment check items");
1078                 RINDENT();
1079                 for (vp = fr_cursor_init(&cursor, &check_tmp);
1080                      vp;
1081                      vp = fr_cursor_next(&cursor)) {
1082                         if (!fr_assignment_op[vp->op]) continue;
1083
1084                         rdebug_pair(2, request, vp);
1085                 }
1086                 REXDENT();
1087                 radius_pairmove(request, &request->config_items, check_tmp, true);
1088
1089                 rcode = RLM_MODULE_OK;
1090                 check_tmp = NULL;
1091         }
1092
1093         if (inst->config->authorize_reply_query && *inst->config->authorize_reply_query) {
1094                 /*
1095                  *      Now get the reply pairs since the paircompare matched
1096                  */
1097                 if (radius_axlat(&expanded, request, inst->config->authorize_reply_query,
1098                                  sql_escape_func, inst) < 0) {
1099                         REDEBUG("Error generating query");
1100                         rcode = RLM_MODULE_FAIL;
1101                         goto error;
1102                 }
1103
1104                 rows = sql_getvpdata(request->reply, inst, request, &handle, &reply_tmp, expanded);
1105                 TALLOC_FREE(expanded);
1106                 if (rows < 0) {
1107                         REDEBUG("SQL query error getting reply attributes");
1108                         rcode = RLM_MODULE_FAIL;
1109                         goto error;
1110                 }
1111
1112                 if (rows == 0) goto skipreply;
1113
1114                 do_fall_through = fall_through(reply_tmp);
1115
1116                 RDEBUG2("User found in radreply table, merging reply items");
1117                 user_found = true;
1118
1119                 rdebug_pair_list(L_DBG_LVL_2, request, reply_tmp, NULL);
1120
1121                 radius_pairmove(request, &request->reply->vps, reply_tmp, true);
1122
1123                 rcode = RLM_MODULE_OK;
1124                 reply_tmp = NULL;
1125         }
1126
1127 skipreply:
1128         if ((do_fall_through == FALL_THROUGH_YES) ||
1129             (inst->config->read_groups && (do_fall_through == FALL_THROUGH_DEFAULT))) {
1130                 rlm_rcode_t ret;
1131
1132                 RDEBUG3("... falling-through to group processing");
1133                 ret = rlm_sql_process_groups(inst, request, &handle, &do_fall_through);
1134                 switch (ret) {
1135                 /*
1136                  *      Nothing bad happened, continue...
1137                  */
1138                 case RLM_MODULE_UPDATED:
1139                         rcode = RLM_MODULE_UPDATED;
1140                         /* FALL-THROUGH */
1141                 case RLM_MODULE_OK:
1142                         if (rcode != RLM_MODULE_UPDATED) {
1143                                 rcode = RLM_MODULE_OK;
1144                         }
1145                         /* FALL-THROUGH */
1146                 case RLM_MODULE_NOOP:
1147                         user_found = true;
1148                         break;
1149
1150                 case RLM_MODULE_NOTFOUND:
1151                         break;
1152
1153                 default:
1154                         rcode = ret;
1155                         goto release;
1156                 }
1157         }
1158
1159         /*
1160          *      Repeat the above process with the default profile or User-Profile
1161          */
1162         if ((do_fall_through == FALL_THROUGH_YES) ||
1163             (inst->config->read_profiles && (do_fall_through == FALL_THROUGH_DEFAULT))) {
1164                 rlm_rcode_t ret;
1165
1166                 /*
1167                  *  Check for a default_profile or for a User-Profile.
1168                  */
1169                 RDEBUG3("... falling-through to profile processing");
1170                 user_profile = pairfind(request->config_items, PW_USER_PROFILE, 0, TAG_ANY);
1171
1172                 char const *profile = user_profile ?
1173                                       user_profile->vp_strvalue :
1174                                       inst->config->default_profile;
1175
1176                 if (!profile || !*profile) {
1177                         goto release;
1178                 }
1179
1180                 RDEBUG2("Checking profile %s", profile);
1181
1182                 if (sql_set_user(inst, request, profile) < 0) {
1183                         REDEBUG("Error setting profile");
1184                         rcode = RLM_MODULE_FAIL;
1185                         goto error;
1186                 }
1187
1188                 ret = rlm_sql_process_groups(inst, request, &handle, &do_fall_through);
1189                 switch (ret) {
1190                 /*
1191                  *      Nothing bad happened, continue...
1192                  */
1193                 case RLM_MODULE_UPDATED:
1194                         rcode = RLM_MODULE_UPDATED;
1195                         /* FALL-THROUGH */
1196                 case RLM_MODULE_OK:
1197                         if (rcode != RLM_MODULE_UPDATED) {
1198                                 rcode = RLM_MODULE_OK;
1199                         }
1200                         /* FALL-THROUGH */
1201                 case RLM_MODULE_NOOP:
1202                         user_found = true;
1203                         break;
1204
1205                 case RLM_MODULE_NOTFOUND:
1206                         break;
1207
1208                 default:
1209                         rcode = ret;
1210                         goto release;
1211                 }
1212         }
1213
1214         /*
1215          *      At this point the key (user) hasn't be found in the check table, the reply table
1216          *      or the group mapping table, and there was no matching profile.
1217          */
1218 release:
1219         if (!user_found) {
1220                 rcode = RLM_MODULE_NOTFOUND;
1221         }
1222
1223         fr_connection_release(inst->pool, handle);
1224         sql_unset_user(inst, request);
1225
1226         return rcode;
1227
1228 error:
1229         pairfree(&check_tmp);
1230         pairfree(&reply_tmp);
1231         sql_unset_user(inst, request);
1232
1233         fr_connection_release(inst->pool, handle);
1234
1235         return rcode;
1236 }
1237
1238 /*
1239  *      Generic function for failing between a bunch of queries.
1240  *
1241  *      Uses the same principle as rlm_linelog, expanding the 'reference' config
1242  *      item using xlat to figure out what query it should execute.
1243  *
1244  *      If the reference matches multiple config items, and a query fails or
1245  *      doesn't update any rows, the next matching config item is used.
1246  *
1247  */
1248 static int acct_redundant(rlm_sql_t *inst, REQUEST *request, sql_acct_section_t *section)
1249 {
1250         rlm_rcode_t             rcode = RLM_MODULE_OK;
1251
1252         rlm_sql_handle_t        *handle = NULL;
1253         int                     sql_ret;
1254         int                     numaffected = 0;
1255
1256         CONF_ITEM               *item;
1257         CONF_PAIR               *pair;
1258         char const              *attr = NULL;
1259         char const              *value;
1260
1261         char                    path[MAX_STRING_LEN];
1262         char                    *p = path;
1263         char                    *expanded = NULL;
1264
1265         rad_assert(section);
1266
1267         if (section->reference[0] != '.') {
1268                 *p++ = '.';
1269         }
1270
1271         if (radius_xlat(p, sizeof(path) - (p - path), request, section->reference, NULL, NULL) < 0) {
1272                 rcode = RLM_MODULE_FAIL;
1273
1274                 goto finish;
1275         }
1276
1277         item = cf_reference_item(NULL, section->cs, path);
1278         if (!item) {
1279                 rcode = RLM_MODULE_FAIL;
1280
1281                 goto finish;
1282         }
1283
1284         if (cf_item_is_section(item)){
1285                 REDEBUG("Sections are not supported as references");
1286                 rcode = RLM_MODULE_FAIL;
1287
1288                 goto finish;
1289         }
1290
1291         pair = cf_itemtopair(item);
1292         attr = cf_pair_attr(pair);
1293
1294         RDEBUG2("Using query template '%s'", attr);
1295
1296         handle = fr_connection_get(inst->pool);
1297         if (!handle) {
1298                 rcode = RLM_MODULE_FAIL;
1299
1300                 goto finish;
1301         }
1302
1303         sql_set_user(inst, request, NULL);
1304
1305         while (true) {
1306                 value = cf_pair_value(pair);
1307                 if (!value) {
1308                         RDEBUG("Ignoring null query");
1309                         rcode = RLM_MODULE_NOOP;
1310
1311                         goto finish;
1312                 }
1313
1314                 if (radius_axlat(&expanded, request, value, sql_escape_func, inst) < 0) {
1315                         rcode = RLM_MODULE_FAIL;
1316
1317                         goto finish;
1318                 }
1319
1320                 if (!*expanded) {
1321                         RDEBUG("Ignoring null query");
1322                         rcode = RLM_MODULE_NOOP;
1323                         talloc_free(expanded);
1324
1325                         goto finish;
1326                 }
1327
1328                 rlm_sql_query_log(inst, request, section, expanded);
1329
1330                 /*
1331                  *  If rlm_sql_query cannot use the socket it'll try and
1332                  *  reconnect. Reconnecting will automatically release
1333                  *  the current socket, and try to select a new one.
1334                  *
1335                  *  If we get RLM_SQL_RECONNECT it means all connections in the pool
1336                  *  were exhausted, and we couldn't create a new connection,
1337                  *  so we do not need to call fr_connection_release.
1338                  */
1339                 sql_ret = rlm_sql_query(&handle, inst, expanded);
1340                 TALLOC_FREE(expanded);
1341                 if (sql_ret == RLM_SQL_RECONNECT) {
1342                         rcode = RLM_MODULE_FAIL;
1343                         goto finish;
1344                 }
1345                 rad_assert(handle);
1346
1347                 /*
1348                  *  Assume all other errors are incidental, and just meant our
1349                  *  operation failed and its not a client or SQL syntax error.
1350                  *
1351                  *  @fixme We should actually be able to distinguish between key
1352                  *  constraint violations (which we expect) and other errors.
1353                  */
1354                 if (sql_ret == RLM_SQL_OK) {
1355                         numaffected = (inst->module->sql_affected_rows)(handle, inst->config);
1356                         if (numaffected > 0) {
1357                                 break;  /* A query succeeded, were done! */
1358                         }
1359
1360                         RDEBUG("No records updated");
1361                 }
1362
1363                 (inst->module->sql_finish_query)(handle, inst->config);
1364
1365                 /*
1366                  *  We assume all entries with the same name form a redundant
1367                  *  set of queries.
1368                  */
1369                 pair = cf_pair_find_next(section->cs, pair, attr);
1370
1371                 if (!pair) {
1372                         RDEBUG("No additional queries configured");
1373                         rcode = RLM_MODULE_NOOP;
1374
1375                         goto finish;
1376                 }
1377
1378                 RDEBUG("Trying next query...");
1379         }
1380
1381         (inst->module->sql_finish_query)(handle, inst->config);
1382
1383 finish:
1384         talloc_free(expanded);
1385         fr_connection_release(inst->pool, handle);
1386         sql_unset_user(inst, request);
1387
1388         return rcode;
1389 }
1390
1391 #ifdef WITH_ACCOUNTING
1392
1393 /*
1394  *      Accounting: Insert or update session data in our sql table
1395  */
1396 static rlm_rcode_t CC_HINT(nonnull) mod_accounting(void *instance, REQUEST * request) {
1397         rlm_sql_t *inst = instance;
1398
1399         if (inst->config->accounting.reference_cp) {
1400                 return acct_redundant(inst, request, &inst->config->accounting);
1401         }
1402
1403         return RLM_MODULE_NOOP;
1404 }
1405
1406 #endif
1407
1408 #ifdef WITH_SESSION_MGMT
1409 /*
1410  *      See if a user is already logged in. Sets request->simul_count to the
1411  *      current session count for this user.
1412  *
1413  *      Check twice. If on the first pass the user exceeds his
1414  *      max. number of logins, do a second pass and validate all
1415  *      logins by querying the terminal server (using eg. SNMP).
1416  */
1417
1418 static rlm_rcode_t CC_HINT(nonnull) mod_checksimul(void *instance, REQUEST * request) {
1419         rlm_rcode_t             rcode = RLM_MODULE_OK;
1420         rlm_sql_handle_t        *handle = NULL;
1421         rlm_sql_t               *inst = instance;
1422         rlm_sql_row_t           row;
1423         int                     check = 0;
1424         uint32_t                ipno = 0;
1425         char const              *call_num = NULL;
1426         VALUE_PAIR              *vp;
1427         int                     ret;
1428         uint32_t                nas_addr = 0;
1429         uint32_t                nas_port = 0;
1430
1431         char                    *expanded = NULL;
1432
1433         /* If simul_count_query is not defined, we don't do any checking */
1434         if (!inst->config->simul_count_query || (inst->config->simul_count_query[0] == '\0')) {
1435                 return RLM_MODULE_NOOP;
1436         }
1437
1438         if((!request->username) || (request->username->length == '\0')) {
1439                 REDEBUG("Zero Length username not permitted");
1440
1441                 return RLM_MODULE_INVALID;
1442         }
1443
1444
1445         if(sql_set_user(inst, request, NULL) < 0) {
1446                 return RLM_MODULE_FAIL;
1447         }
1448
1449         if (radius_axlat(&expanded, request, inst->config->simul_count_query, sql_escape_func, inst) < 0) {
1450                 sql_unset_user(inst, request);
1451                 return RLM_MODULE_FAIL;
1452         }
1453
1454         /* initialize the sql socket */
1455         handle = fr_connection_get(inst->pool);
1456         if (!handle) {
1457                 talloc_free(expanded);
1458                 sql_unset_user(inst, request);
1459                 return RLM_MODULE_FAIL;
1460         }
1461
1462         if (rlm_sql_select_query(&handle, inst, expanded) != RLM_SQL_OK) {
1463                 rcode = RLM_MODULE_FAIL;
1464                 goto finish;
1465         }
1466
1467         ret = rlm_sql_fetch_row(&handle, inst);
1468         if (ret != 0) {
1469                 rcode = RLM_MODULE_FAIL;
1470                 goto finish;
1471         }
1472
1473         row = handle->row;
1474         if (!row) {
1475                 rcode = RLM_MODULE_FAIL;
1476                 goto finish;
1477         }
1478
1479         request->simul_count = atoi(row[0]);
1480
1481         (inst->module->sql_finish_select_query)(handle, inst->config);
1482         TALLOC_FREE(expanded);
1483
1484         if (request->simul_count < request->simul_max) {
1485                 rcode = RLM_MODULE_OK;
1486                 goto finish;
1487         }
1488
1489         /*
1490          *      Looks like too many sessions, so let's start verifying
1491          *      them, unless told to rely on count query only.
1492          */
1493         if (!inst->config->simul_verify_query || (inst->config->simul_verify_query[0] == '\0')) {
1494                 rcode = RLM_MODULE_OK;
1495
1496                 goto finish;
1497         }
1498
1499         if (radius_axlat(&expanded, request, inst->config->simul_verify_query, sql_escape_func, inst) < 0) {
1500                 rcode = RLM_MODULE_FAIL;
1501
1502                 goto finish;
1503         }
1504
1505         if (rlm_sql_select_query(&handle, inst, expanded) != RLM_SQL_OK) goto finish;
1506
1507         /*
1508          *      Setup some stuff, like for MPP detection.
1509          */
1510         request->simul_count = 0;
1511
1512         if ((vp = pairfind(request->packet->vps, PW_FRAMED_IP_ADDRESS, 0, TAG_ANY)) != NULL) {
1513                 ipno = vp->vp_ipaddr;
1514         }
1515
1516         if ((vp = pairfind(request->packet->vps, PW_CALLING_STATION_ID, 0, TAG_ANY)) != NULL) {
1517                 call_num = vp->vp_strvalue;
1518         }
1519
1520         while (rlm_sql_fetch_row(&handle, inst) == 0) {
1521                 row = handle->row;
1522                 if (!row) {
1523                         break;
1524                 }
1525
1526                 if (!row[2]){
1527                         RDEBUG("Cannot zap stale entry. No username present in entry");
1528                         rcode = RLM_MODULE_FAIL;
1529
1530                         goto finish;
1531                 }
1532
1533                 if (!row[1]){
1534                         RDEBUG("Cannot zap stale entry. No session id in entry");
1535                         rcode = RLM_MODULE_FAIL;
1536
1537                         goto finish;
1538                 }
1539
1540                 if (row[3]) {
1541                         nas_addr = inet_addr(row[3]);
1542                 }
1543
1544                 if (row[4]) {
1545                         nas_port = atoi(row[4]);
1546                 }
1547
1548                 check = rad_check_ts(nas_addr, nas_port, row[2], row[1]);
1549                 if (check == 0) {
1550                         /*
1551                          *      Stale record - zap it.
1552                          */
1553                         if (inst->config->deletestalesessions == true) {
1554                                 uint32_t framed_addr = 0;
1555                                 char proto = 0;
1556                                 int sess_time = 0;
1557
1558                                 if (row[5])
1559                                         framed_addr = inet_addr(row[5]);
1560                                 if (row[7]){
1561                                         if (strcmp(row[7], "PPP") == 0)
1562                                                 proto = 'P';
1563                                         else if (strcmp(row[7], "SLIP") == 0)
1564                                                 proto = 'S';
1565                                 }
1566                                 if (row[8])
1567                                         sess_time = atoi(row[8]);
1568                                 session_zap(request, nas_addr, nas_port,
1569                                             row[2], row[1], framed_addr,
1570                                             proto, sess_time);
1571                         }
1572                 }
1573                 else if (check == 1) {
1574                         /*
1575                          *      User is still logged in.
1576                          */
1577                         ++request->simul_count;
1578
1579                         /*
1580                          *      Does it look like a MPP attempt?
1581                          */
1582                         if (row[5] && ipno && inet_addr(row[5]) == ipno) {
1583                                 request->simul_mpp = 2;
1584                         } else if (row[6] && call_num && !strncmp(row[6],call_num,16)) {
1585                                 request->simul_mpp = 2;
1586                         }
1587                 } else {
1588                         /*
1589                          *      Failed to check the terminal server for
1590                          *      duplicate logins: return an error.
1591                          */
1592                         REDEBUG("Failed to check the terminal server for user '%s'.", row[2]);
1593
1594                         rcode = RLM_MODULE_FAIL;
1595                         goto finish;
1596                 }
1597         }
1598
1599         finish:
1600
1601         (inst->module->sql_finish_select_query)(handle, inst->config);
1602         fr_connection_release(inst->pool, handle);
1603         talloc_free(expanded);
1604         sql_unset_user(inst, request);
1605
1606         /*
1607          *      The Auth module apparently looks at request->simul_count,
1608          *      not the return value of this module when deciding to deny
1609          *      a call for too many sessions.
1610          */
1611         return rcode;
1612 }
1613 #endif
1614
1615 /*
1616  *      Postauth: Write a record of the authentication attempt
1617  */
1618 static rlm_rcode_t CC_HINT(nonnull) mod_post_auth(void *instance, REQUEST * request) {
1619         rlm_sql_t *inst = instance;
1620
1621         if (inst->config->postauth.reference_cp) {
1622                 return acct_redundant(inst, request, &inst->config->postauth);
1623         }
1624
1625         return RLM_MODULE_NOOP;
1626 }
1627
1628 /*
1629  *      Execute postauth_query after authentication
1630  */
1631
1632
1633 /* globally exported name */
1634 module_t rlm_sql = {
1635         RLM_MODULE_INIT,
1636         "SQL",
1637         RLM_TYPE_THREAD_SAFE,   /* type: reserved */
1638         sizeof(rlm_sql_t),
1639         module_config,
1640         mod_instantiate,        /* instantiation */
1641         mod_detach,             /* detach */
1642         {
1643                 NULL,                   /* authentication */
1644                 mod_authorize,  /* authorization */
1645                 NULL,                   /* preaccounting */
1646 #ifdef WITH_ACCOUNTING
1647                 mod_accounting, /* accounting */
1648 #else
1649                 NULL,
1650 #endif
1651 #ifdef WITH_SESSION_MGMT
1652                 mod_checksimul, /* checksimul */
1653 #else
1654                 NULL,
1655 #endif
1656                 NULL,                   /* pre-proxy */
1657                 NULL,                   /* post-proxy */
1658                 mod_post_auth   /* post-auth */
1659         },
1660 };