res/res_odbc.c

   1 /*
   2  * Asterisk -- An open source telephony toolkit.
   3  *
   4  * Copyright (C) 1999 - 2005, Digium, Inc.
   5  *
   6  * Mark Spencer <markster@digium.com>
   7  *
   8  * res_odbc.c <ODBC resource manager>
   9  * Copyright (C) 2004 - 2005 Anthony Minessale II <anthmct@yahoo.com>
  10  *
  11  * See http://www.asterisk.org for more information about
  12  * the Asterisk project. Please do not directly contact
  13  * any of the maintainers of this project for assistance;
  14  * the project provides a web site, mailing lists and IRC
  15  * channels for your use.
  16  *
  17  * This program is free software, distributed under the terms of
  18  * the GNU General Public License Version 2. See the LICENSE file
  19  * at the top of the source tree.
  20  */
  21
  22 /*! \file
  23  *
  24  * \brief ODBC resource manager
  25  *
  26  * \author Mark Spencer <markster@digium.com>
  27  * \author Anthony Minessale II <anthmct@yahoo.com>
  28  *
  29  * \arg See also: \ref cdr_odbc
  30  */
  31
  32 /*** MODULEINFO
  33         <depend>unixodbc</depend>
  34  ***/
  35
  36 #include "asterisk.h"
  37
  38 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  39
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <unistd.h>
  43 #include <string.h>
  44
  45 #include "asterisk/file.h"
  46 #include "asterisk/logger.h"
  47 #include "asterisk/channel.h"
  48 #include "asterisk/config.h"
  49 #include "asterisk/options.h"
  50 #include "asterisk/pbx.h"
  51 #include "asterisk/module.h"
  52 #include "asterisk/cli.h"
  53 #include "asterisk/lock.h"
  54 #include "asterisk/res_odbc.h"
  55
  56 struct odbc_class
  57 {
  58         AST_LIST_ENTRY(odbc_class) list;
  59         char name[80];
  60         char dsn[80];
  61         char username[80];
  62         char password[80];
  63         char sanitysql[256];
  64         SQLHENV env;
  65         unsigned int haspool:1;         /* Boolean - TDS databases need this */
  66         unsigned int limit:10;          /* Gives a limit of 1023 maximum */
  67         unsigned int count:10;          /* Running count of pooled connections */
  68         unsigned int delme:1;                   /* Purge the class */
  69         AST_LIST_HEAD(, odbc_obj) odbc_obj;
  70 };
  71
  72 AST_LIST_HEAD_STATIC(odbc_list, odbc_class);
  73
  74 static odbc_status odbc_obj_connect(struct odbc_obj *obj);
  75 static odbc_status odbc_obj_disconnect(struct odbc_obj *obj);
  76 static int odbc_register_class(struct odbc_class *class, int connect);
  77
  78
  79 SQLHSTMT ast_odbc_prepare_and_execute(struct odbc_obj *obj, SQLHSTMT (*prepare_cb)(struct odbc_obj *obj, void *data), void *data)
  80 {
  81         int res = 0, i, attempt;
  82         SQLINTEGER nativeerror=0, numfields=0;
  83         SQLSMALLINT diagbytes=0;
  84         unsigned char state[10], diagnostic[256];
  85         SQLHSTMT stmt;
  86
  87         for (attempt = 0; attempt < 2; attempt++) {
  88                 /* This prepare callback may do more than just prepare -- it may also
  89                  * bind parameters, bind results, etc.  The real key, here, is that
  90                  * when we disconnect, all handles become invalid for most databases.
  91                  * We must therefore redo everything when we establish a new
  92                  * connection. */
  93                 stmt = prepare_cb(obj, data);
  94
  95                 if (stmt) {
  96                         res = SQLExecute(stmt);
  97                         if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO) && (res != SQL_NO_DATA)) {
  98                                 if (res == SQL_ERROR) {
  99                                         SQLGetDiagField(SQL_HANDLE_STMT, stmt, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
 100                                         for (i=0; i< numfields + 1; i++) {
 101                                                 SQLGetDiagRec(SQL_HANDLE_STMT, stmt, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
 102                                                 ast_log(LOG_WARNING, "SQL Execute returned an error %d: %s: %s (%d)\n", res, state, diagnostic, diagbytes);
 103                                                 if (i > 10) {
 104                                                         ast_log(LOG_WARNING, "Oh, that was good.  There are really %d diagnostics?\n", (int)numfields);
 105                                                         break;
 106                                                 }
 107                                         }
 108                                 }
 109
 110                                 ast_log(LOG_WARNING, "SQL Execute error %d! Attempting a reconnect...\n", res);
 111                                 SQLFreeHandle(SQL_HANDLE_STMT, stmt);
 112                                 stmt = NULL;
 113
 114                                 obj->up = 0;
 115                                 /*
 116                                  * While this isn't the best way to try to correct an error, this won't automatically
 117                                  * fail when the statement handle invalidates.
 118                                  */
 119                                 ast_odbc_sanity_check(obj);
 120                                 continue;
 121                         }
 122                         break;
 123                 } else if (attempt == 0)
 124                         ast_odbc_sanity_check(obj);
 125         }
 126
 127         return stmt;
 128 }
 129
 130 int ast_odbc_smart_execute(struct odbc_obj *obj, SQLHSTMT stmt)
 131 {
 132         int res = 0, i;
 133         SQLINTEGER nativeerror=0, numfields=0;
 134         SQLSMALLINT diagbytes=0;
 135         unsigned char state[10], diagnostic[256];
 136
 137         res = SQLExecute(stmt);
 138         if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO) && (res != SQL_NO_DATA)) {
 139                 if (res == SQL_ERROR) {
 140                         SQLGetDiagField(SQL_HANDLE_STMT, stmt, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
 141                         for (i=0; i< numfields + 1; i++) {
 142                                 SQLGetDiagRec(SQL_HANDLE_STMT, stmt, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
 143                                 ast_log(LOG_WARNING, "SQL Execute returned an error %d: %s: %s (%d)\n", res, state, diagnostic, diagbytes);
 144                                 if (i > 10) {
 145                                         ast_log(LOG_WARNING, "Oh, that was good.  There are really %d diagnostics?\n", (int)numfields);
 146                                         break;
 147                                 }
 148                         }
 149                 }
 150 #if 0
 151                 /* This is a really bad method of trying to correct a dead connection.  It
 152                  * only ever really worked with MySQL.  It will not work with any other
 153                  * database, since most databases prepare their statements on the server,
 154                  * and if you disconnect, you invalidate the statement handle.  Hence, if
 155                  * you disconnect, you're going to fail anyway, whether you try to execute
 156                  * a second time or not.
 157                  */
 158                 ast_log(LOG_WARNING, "SQL Execute error %d! Attempting a reconnect...\n", res);
 159                 ast_mutex_lock(&obj->lock);
 160                 obj->up = 0;
 161                 ast_mutex_unlock(&obj->lock);
 162                 odbc_obj_disconnect(obj);
 163                 odbc_obj_connect(obj);
 164                 res = SQLExecute(stmt);
 165 #endif
 166         }
 167
 168         return res;
 169 }
 170
 171
 172 int ast_odbc_sanity_check(struct odbc_obj *obj)
 173 {
 174         char *test_sql = "select 1";
 175         SQLHSTMT stmt;
 176         int res = 0;
 177
 178         if (obj->parent->sanitysql)
 179                 test_sql = obj->parent->sanitysql;
 180
 181         if (obj->up) {
 182                 res = SQLAllocHandle(SQL_HANDLE_STMT, obj->con, &stmt);
 183                 if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
 184                         obj->up = 0;
 185                 } else {
 186                         res = SQLPrepare(stmt, (unsigned char *)test_sql, SQL_NTS);
 187                         if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
 188                                 obj->up = 0;
 189                         } else {
 190                                 res = SQLExecute(stmt);
 191                                 if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
 192                                         obj->up = 0;
 193                                 }
 194                         }
 195                 }
 196                 SQLFreeHandle (SQL_HANDLE_STMT, stmt);
 197         }
 198
 199         if (!obj->up) { /* Try to reconnect! */
 200                 ast_log(LOG_WARNING, "Connection is down attempting to reconnect...\n");
 201                 odbc_obj_disconnect(obj);
 202                 odbc_obj_connect(obj);
 203         }
 204         return obj->up;
 205 }
 206
 207 static int load_odbc_config(void)
 208 {
 209         static char *cfg = "res_odbc.conf";
 210         struct ast_config *config;
 211         struct ast_variable *v;
 212         char *cat, *dsn, *username, *password, *sanitysql;
 213         int enabled, pooling, limit;
 214         int connect = 0, res = 0;
 215
 216         struct odbc_class *new;
 217
 218         config = ast_config_load(cfg);
 219         if (!config) {
 220                 ast_log(LOG_WARNING, "Unable to load config file res_odbc.conf\n");
 221                 return -1;
 222         }
 223         for (cat = ast_category_browse(config, NULL); cat; cat=ast_category_browse(config, cat)) {
 224                 if (!strcasecmp(cat, "ENV")) {
 225                         for (v = ast_variable_browse(config, cat); v; v = v->next) {
 226                                 setenv(v->name, v->value, 1);
 227                                 ast_log(LOG_NOTICE, "Adding ENV var: %s=%s\n", v->name, v->value);
 228                         }
 229                 } else {
 230                         /* Reset all to defaults for each class of odbc connections */
 231                         dsn = username = password = sanitysql = NULL;
 232                         enabled = 1;
 233                         connect = 0;
 234                         pooling = 0;
 235                         limit = 0;
 236                         for (v = ast_variable_browse(config, cat); v; v = v->next) {
 237                                 if (!strcasecmp(v->name, "pooling")) {
 238                                         if (ast_true(v->value))
 239                                                 pooling = 1;
 240                                 } else if (!strcasecmp(v->name, "limit")) {
 241                                         sscanf(v->value, "%d", &limit);
 242                                         if (ast_true(v->value) && !limit) {
 243                                                 ast_log(LOG_WARNING, "Limit should be a number, not a boolean: '%s'.  Setting limit to 1023 for ODBC class '%s'.\n", v->value, cat);
 244                                                 limit = 1023;
 245                                         } else if (ast_false(v->value)) {
 246                                                 ast_log(LOG_WARNING, "Limit should be a number, not a boolean: '%s'.  Disabling ODBC class '%s'.\n", v->value, cat);
 247                                                 enabled = 0;
 248                                                 break;
 249                                         }
 250                                 } else if (!strcasecmp(v->name, "enabled")) {
 251                                         enabled = ast_true(v->value);
 252                                 } else if (!strcasecmp(v->name, "pre-connect")) {
 253                                         connect = ast_true(v->value);
 254                                 } else if (!strcasecmp(v->name, "dsn")) {
 255                                         dsn = v->value;
 256                                 } else if (!strcasecmp(v->name, "username")) {
 257                                         username = v->value;
 258                                 } else if (!strcasecmp(v->name, "password")) {
 259                                         password = v->value;
 260                                 } else if (!strcasecmp(v->name, "sanitysql")) {
 261                                         sanitysql = v->value;
 262                                 }
 263                         }
 264
 265                         if (enabled && !ast_strlen_zero(dsn)) {
 266                                 new = ast_calloc(1, sizeof(*new));
 267
 268                                 if (!new) {
 269                                         res = -1;
 270                                         break;
 271                                 }
 272
 273                                 if (cat)
 274                                         ast_copy_string(new->name, cat, sizeof(new->name));
 275                                 if (dsn)
 276                                         ast_copy_string(new->dsn, dsn, sizeof(new->dsn));
 277                                 if (username)
 278                                         ast_copy_string(new->username, username, sizeof(new->username));
 279                                 if (password)
 280                                         ast_copy_string(new->password, password, sizeof(new->password));
 281                                 if (sanitysql)
 282                                         ast_copy_string(new->sanitysql, sanitysql, sizeof(new->sanitysql));
 283
 284                                 SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &new->env);
 285                                 res = SQLSetEnvAttr(new->env, SQL_ATTR_ODBC_VERSION, (void *) SQL_OV_ODBC3, 0);
 286
 287                                 if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
 288                                         ast_log(LOG_WARNING, "res_odbc: Error SetEnv\n");
 289                                         SQLFreeHandle(SQL_HANDLE_ENV, new->env);
 290                                         return res;
 291                                 }
 292
 293                                 if (pooling) {
 294                                         new->haspool = pooling;
 295                                         if (limit) {
 296                                                 new->limit = limit;
 297                                         } else {
 298                                                 ast_log(LOG_WARNING, "Pooling without also setting a limit is pointless.  Changing limit from 0 to 5.\n");
 299                                                 new->limit = 5;
 300                                         }
 301                                 }
 302
 303                                 odbc_register_class(new, connect);
 304                                 ast_log(LOG_NOTICE, "Registered ODBC class '%s' dsn->[%s]\n", cat, dsn);
 305                         }
 306                 }
 307         }
 308         ast_config_destroy(config);
 309         return res;
 310 }
 311
 312 static int odbc_show_command(int fd, int argc, char **argv)
 313 {
 314         struct odbc_class *class;
 315         struct odbc_obj *current;
 316
 317         AST_LIST_LOCK(&odbc_list);
 318         AST_LIST_TRAVERSE(&odbc_list, class, list) {
 319                 if ((argc == 2) || (argc == 3 && !strcmp(argv[2], "all")) || (!strcmp(argv[2], class->name))) {
 320                         int count = 0;
 321                         ast_cli(fd, "Name: %s\nDSN: %s\n", class->name, class->dsn);
 322
 323                         if (class->haspool) {
 324                                 ast_cli(fd, "Pooled: yes\nLimit: %d\nConnections in use: %d\n", class->limit, class->count);
 325
 326                                 AST_LIST_TRAVERSE(&(class->odbc_obj), current, list) {
 327                                         ast_cli(fd, "  Connection %d: %s", ++count, current->up && ast_odbc_sanity_check(current) ? "connected" : "disconnected");
 328                                 }
 329                         } else {
 330                                 /* Should only ever be one of these */
 331                                 AST_LIST_TRAVERSE(&(class->odbc_obj), current, list) {
 332                                         ast_cli(fd, "Pooled: no\nConnected: %s\n", current->up && ast_odbc_sanity_check(current) ? "yes" : "no");
 333                                 }
 334                         }
 335
 336                                 ast_cli(fd, "\n");
 337                 }
 338         }
 339         AST_LIST_UNLOCK(&odbc_list);
 340
 341         return 0;
 342 }
 343
 344 static const char show_usage[] =
 345 "Usage: odbc show [<class>]\n"
 346 "       List settings of a particular ODBC class.\n"
 347 "       or, if not specified, all classes.\n";
 348
 349 static struct ast_cli_entry cli_odbc[] = {
 350         { { "odbc", "show", NULL },
 351         odbc_show_command, "List ODBC DSN(s)",
 352         show_usage },
 353 };
 354
 355 static int odbc_register_class(struct odbc_class *class, int connect)
 356 {
 357         struct odbc_obj *obj;
 358         if (class) {
 359                 AST_LIST_LOCK(&odbc_list);
 360                 AST_LIST_INSERT_HEAD(&odbc_list, class, list);
 361                 AST_LIST_UNLOCK(&odbc_list);
 362
 363                 if (connect) {
 364                         /* Request and release builds a connection */
 365                         obj = ast_odbc_request_obj(class->name, 0);
 366                         ast_odbc_release_obj(obj);
 367                 }
 368
 369                 return 0;
 370         } else {
 371                 ast_log(LOG_WARNING, "Attempted to register a NULL class?\n");
 372                 return -1;
 373         }
 374 }
 375
 376 void ast_odbc_release_obj(struct odbc_obj *obj)
 377 {
 378         /* For pooled connections, this frees the connection to be
 379          * reused.  For non-pooled connections, it does nothing. */
 380         obj->used = 0;
 381 }
 382
 383 struct odbc_obj *ast_odbc_request_obj(const char *name, int check)
 384 {
 385         struct odbc_obj *obj = NULL;
 386         struct odbc_class *class;
 387
 388         AST_LIST_LOCK(&odbc_list);
 389         AST_LIST_TRAVERSE(&odbc_list, class, list) {
 390                 if (!strcmp(class->name, name))
 391                         break;
 392         }
 393         AST_LIST_UNLOCK(&odbc_list);
 394
 395         if (!class)
 396                 return NULL;
 397
 398         AST_LIST_LOCK(&class->odbc_obj);
 399         if (class->haspool) {
 400                 /* Recycle connections before building another */
 401                 AST_LIST_TRAVERSE(&class->odbc_obj, obj, list) {
 402                         if (! obj->used) {
 403                                 obj->used = 1;
 404                                 break;
 405                         }
 406                 }
 407
 408                 if (!obj && (class->count < class->limit)) {
 409                         class->count++;
 410                         obj = ast_calloc(1, sizeof(*obj));
 411                         if (!obj) {
 412                                 AST_LIST_UNLOCK(&class->odbc_obj);
 413                                 return NULL;
 414                         }
 415                         ast_mutex_init(&obj->lock);
 416                         obj->parent = class;
 417                         odbc_obj_connect(obj);
 418                         AST_LIST_INSERT_TAIL(&class->odbc_obj, obj, list);
 419                 }
 420         } else {
 421                 /* Non-pooled connection: multiple modules can use the same connection. */
 422                 AST_LIST_TRAVERSE(&class->odbc_obj, obj, list) {
 423                         /* Non-pooled connection: if there is an entry, return it */
 424                         break;
 425                 }
 426
 427                 if (!obj) {
 428                         /* No entry: build one */
 429                         obj = ast_calloc(1, sizeof(*obj));
 430                         if (!obj) {
 431                                 AST_LIST_UNLOCK(&class->odbc_obj);
 432                                 return NULL;
 433                         }
 434                         ast_mutex_init(&obj->lock);
 435                         obj->parent = class;
 436                         if (odbc_obj_connect(obj) == ODBC_FAIL) {
 437                                 ast_log(LOG_WARNING, "Failed to connect\n");
 438                                 ast_mutex_destroy(&obj->lock);
 439                                 free(obj);
 440                         } else {
 441                                 AST_LIST_INSERT_HEAD(&class->odbc_obj, obj, list);
 442                         }
 443                 }
 444         }
 445         AST_LIST_UNLOCK(&class->odbc_obj);
 446
 447         if (obj && check) {
 448                 ast_odbc_sanity_check(obj);
 449         }
 450         return obj;
 451 }
 452
 453 static odbc_status odbc_obj_disconnect(struct odbc_obj *obj)
 454 {
 455         int res;
 456         ast_mutex_lock(&obj->lock);
 457
 458         res = SQLDisconnect(obj->con);
 459
 460         if (res == ODBC_SUCCESS) {
 461                 ast_log(LOG_WARNING, "res_odbc: disconnected %d from %s [%s]\n", res, obj->parent->name, obj->parent->dsn);
 462         } else {
 463                 ast_log(LOG_WARNING, "res_odbc: %s [%s] already disconnected\n",
 464                 obj->parent->name, obj->parent->dsn);
 465         }
 466         obj->up = 0;
 467         ast_mutex_unlock(&obj->lock);
 468         return ODBC_SUCCESS;
 469 }
 470
 471 static odbc_status odbc_obj_connect(struct odbc_obj *obj)
 472 {
 473         int res;
 474         SQLINTEGER err;
 475         short int mlen;
 476         unsigned char msg[200], stat[10];
 477 #ifdef NEEDTRACE
 478         SQLINTEGER enable = 1;
 479         char *tracefile = "/tmp/odbc.trace";
 480 #endif
 481         ast_mutex_lock(&obj->lock);
 482
 483         res = SQLAllocHandle(SQL_HANDLE_DBC, obj->parent->env, &obj->con);
 484
 485         if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
 486
 487                 ast_log(LOG_WARNING, "res_odbc: Error AllocHDB %d\n", res);
 488                 SQLFreeHandle(SQL_HANDLE_ENV, obj->parent->env);
 489
 490                 ast_mutex_unlock(&obj->lock);
 491                 return ODBC_FAIL;
 492         }
 493         SQLSetConnectAttr(obj->con, SQL_LOGIN_TIMEOUT, (SQLPOINTER *) 10, 0);
 494 #ifdef NEEDTRACE
 495         SQLSetConnectAttr(obj->con, SQL_ATTR_TRACE, &enable, SQL_IS_INTEGER);
 496         SQLSetConnectAttr(obj->con, SQL_ATTR_TRACEFILE, tracefile, strlen(tracefile));
 497 #endif
 498
 499         if (obj->up) {
 500                 odbc_obj_disconnect(obj);
 501                 ast_log(LOG_NOTICE, "Re-connecting %s\n", obj->parent->name);
 502         } else {
 503                 ast_log(LOG_NOTICE, "Connecting %s\n", obj->parent->name);
 504         }
 505
 506         res = SQLConnect(obj->con,
 507                    (SQLCHAR *) obj->parent->dsn, SQL_NTS,
 508                    (SQLCHAR *) obj->parent->username, SQL_NTS,
 509                    (SQLCHAR *) obj->parent->password, SQL_NTS);
 510
 511         if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
 512                 SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, 1, stat, &err, msg, 100, &mlen);
 513                 ast_mutex_unlock(&obj->lock);
 514                 ast_log(LOG_WARNING, "res_odbc: Error SQLConnect=%d errno=%d %s\n", res, (int)err, msg);
 515                 return ODBC_FAIL;
 516         } else {
 517                 ast_log(LOG_NOTICE, "res_odbc: Connected to %s [%s]\n", obj->parent->name, obj->parent->dsn);
 518                 obj->up = 1;
 519         }
 520
 521         ast_mutex_unlock(&obj->lock);
 522         return ODBC_SUCCESS;
 523 }
 524
 525 static int reload(void)
 526 {
 527         static char *cfg = "res_odbc.conf";
 528         struct ast_config *config;
 529         struct ast_variable *v;
 530         char *cat, *dsn, *username, *password, *sanitysql;
 531         int enabled, pooling, limit;
 532         int connect = 0, res = 0;
 533
 534         struct odbc_class *new, *class;
 535         struct odbc_obj *current;
 536
 537         /* First, mark all to be purged */
 538         AST_LIST_LOCK(&odbc_list);
 539         AST_LIST_TRAVERSE(&odbc_list, class, list) {
 540                 class->delme = 1;
 541         }
 542
 543         config = ast_config_load(cfg);
 544         if (config) {
 545                 for (cat = ast_category_browse(config, NULL); cat; cat=ast_category_browse(config, cat)) {
 546                         if (!strcasecmp(cat, "ENV")) {
 547                                 for (v = ast_variable_browse(config, cat); v; v = v->next) {
 548                                         setenv(v->name, v->value, 1);
 549                                         ast_log(LOG_NOTICE, "Adding ENV var: %s=%s\n", v->name, v->value);
 550                                 }
 551                         } else {
 552                                 /* Reset all to defaults for each class of odbc connections */
 553                                 dsn = username = password = sanitysql = NULL;
 554                                 enabled = 1;
 555                                 connect = 0;
 556                                 pooling = 0;
 557                                 limit = 0;
 558                                 for (v = ast_variable_browse(config, cat); v; v = v->next) {
 559                                         if (!strcasecmp(v->name, "pooling")) {
 560                                                 pooling = 1;
 561                                         } else if (!strcasecmp(v->name, "limit")) {
 562                                                 sscanf(v->value, "%d", &limit);
 563                                                 if (ast_true(v->value) && !limit) {
 564                                                         ast_log(LOG_WARNING, "Limit should be a number, not a boolean: '%s'.  Setting limit to 1023 for ODBC class '%s'.\n", v->value, cat);
 565                                                         limit = 1023;
 566                                                 } else if (ast_false(v->value)) {
 567                                                         ast_log(LOG_WARNING, "Limit should be a number, not a boolean: '%s'.  Disabling ODBC class '%s'.\n", v->value, cat);
 568                                                         enabled = 0;
 569                                                         break;
 570                                                 }
 571                                         } else if (!strcasecmp(v->name, "enabled")) {
 572                                                 enabled = ast_true(v->value);
 573                                         } else if (!strcasecmp(v->name, "pre-connect")) {
 574                                                 connect = ast_true(v->value);
 575                                         } else if (!strcasecmp(v->name, "dsn")) {
 576                                                 dsn = v->value;
 577                                         } else if (!strcasecmp(v->name, "username")) {
 578                                                 username = v->value;
 579                                         } else if (!strcasecmp(v->name, "password")) {
 580                                                 password = v->value;
 581                                         } else if (!strcasecmp(v->name, "sanitysql")) {
 582                                                 sanitysql = v->value;
 583                                         }
 584                                 }
 585
 586                                 if (enabled && !ast_strlen_zero(dsn)) {
 587                                         /* First, check the list to see if it already exists */
 588                                         AST_LIST_TRAVERSE(&odbc_list, class, list) {
 589                                                 if (!strcmp(class->name, cat)) {
 590                                                         class->delme = 0;
 591                                                         break;
 592                                                 }
 593                                         }
 594
 595                                         if (class) {
 596                                                 new = class;
 597                                         } else {
 598                                                 new = ast_calloc(1, sizeof(*new));
 599                                         }
 600
 601                                         if (!new) {
 602                                                 res = -1;
 603                                                 break;
 604                                         }
 605
 606                                         if (cat)
 607                                                 ast_copy_string(new->name, cat, sizeof(new->name));
 608                                         if (dsn)
 609                                                 ast_copy_string(new->dsn, dsn, sizeof(new->dsn));
 610                                         if (username)
 611                                                 ast_copy_string(new->username, username, sizeof(new->username));
 612                                         if (password)
 613                                                 ast_copy_string(new->password, password, sizeof(new->password));
 614                                         if (sanitysql)
 615                                                 ast_copy_string(new->sanitysql, sanitysql, sizeof(new->sanitysql));
 616
 617                                         if (!class) {
 618                                                 SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &new->env);
 619                                                 res = SQLSetEnvAttr(new->env, SQL_ATTR_ODBC_VERSION, (void *) SQL_OV_ODBC3, 0);
 620
 621                                                 if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
 622                                                         ast_log(LOG_WARNING, "res_odbc: Error SetEnv\n");
 623                                                         SQLFreeHandle(SQL_HANDLE_ENV, new->env);
 624                                                         AST_LIST_UNLOCK(&odbc_list);
 625                                                         return res;
 626                                                 }
 627                                         }
 628
 629                                         if (pooling) {
 630                                                 new->haspool = pooling;
 631                                                 if (limit) {
 632                                                         new->limit = limit;
 633                                                 } else {
 634                                                         ast_log(LOG_WARNING, "Pooling without also setting a limit is pointless.  Changing limit from 0 to 5.\n");
 635                                                         new->limit = 5;
 636                                                 }
 637                                         }
 638
 639                                         if (class) {
 640                                                 ast_log(LOG_NOTICE, "Refreshing ODBC class '%s' dsn->[%s]\n", cat, dsn);
 641                                         } else {
 642                                                 odbc_register_class(new, connect);
 643                                                 ast_log(LOG_NOTICE, "Registered ODBC class '%s' dsn->[%s]\n", cat, dsn);
 644                                         }
 645                                 }
 646                         }
 647                 }
 648                 ast_config_destroy(config);
 649         }
 650
 651         /* Purge classes that we know can go away (pooled with 0, only) */
 652         AST_LIST_TRAVERSE_SAFE_BEGIN(&odbc_list, class, list) {
 653                 if (class->delme && class->haspool && class->count == 0) {
 654                         AST_LIST_TRAVERSE_SAFE_BEGIN(&(class->odbc_obj), current, list) {
 655                                 AST_LIST_REMOVE_CURRENT(&(class->odbc_obj), list);
 656                                 odbc_obj_disconnect(current);
 657                                 ast_mutex_destroy(&current->lock);
 658                                 free(current);
 659                         }
 660                         AST_LIST_TRAVERSE_SAFE_END;
 661
 662                         AST_LIST_REMOVE_CURRENT(&odbc_list, list);
 663                         free(class);
 664                 }
 665         }
 666         AST_LIST_TRAVERSE_SAFE_END;
 667         AST_LIST_UNLOCK(&odbc_list);
 668
 669         return 0;
 670 }
 671
 672 static int unload_module(void)
 673 {
 674         /* Prohibit unloading */
 675         return -1;
 676 }
 677
 678 static int load_module(void)
 679 {
 680         if(load_odbc_config() == -1)
 681                 return AST_MODULE_LOAD_DECLINE;
 682         ast_cli_register_multiple(cli_odbc, sizeof(cli_odbc) / sizeof(struct ast_cli_entry));
 683         ast_log(LOG_NOTICE, "res_odbc loaded.\n");
 684         return 0;
 685 }
 686
 687 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_GLOBAL_SYMBOLS, "ODBC Resource",
 688                 .load = load_module,
 689                 .unload = unload_module,
 690                 .reload = reload,
 691                );