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         SQLHENV env;
  64         unsigned int haspool:1;         /* Boolean - TDS databases need this */
  65         unsigned int limit:10;          /* Gives a limit of 1023 maximum */
  66         unsigned int count:10;          /* Running count of pooled connections */
  67         unsigned int delme:1;                   /* Purge the class */
  68         AST_LIST_HEAD(, odbc_obj) odbc_obj;
  69 };
  70
  71 AST_LIST_HEAD_STATIC(odbc_list, odbc_class);
  72
  73 static odbc_status odbc_obj_connect(struct odbc_obj *obj);
  74 static odbc_status odbc_obj_disconnect(struct odbc_obj *obj);
  75 static int odbc_register_class(struct odbc_class *class, int connect);
  76
  77
  78 SQLHSTMT ast_odbc_prepare_and_execute(struct odbc_obj *obj, SQLHSTMT (*prepare_cb)(struct odbc_obj *obj, void *data), void *data)
  79 {
  80         int res = 0, i, attempt;
  81         SQLINTEGER nativeerror=0, numfields=0;
  82         SQLSMALLINT diagbytes=0;
  83         unsigned char state[10], diagnostic[256];
  84         SQLHSTMT stmt;
  85
  86         for (attempt = 0; attempt < 2; attempt++) {
  87                 /* This prepare callback may do more than just prepare -- it may also
  88                  * bind parameters, bind results, etc.  The real key, here, is that
  89                  * when we disconnect, all handles become invalid for most databases.
  90                  * We must therefore redo everything when we establish a new
  91                  * connection. */
  92                 stmt = prepare_cb(obj, data);
  93
  94                 if (stmt) {
  95                         res = SQLExecute(stmt);
  96                         if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO) && (res != SQL_NO_DATA)) {
  97                                 if (res == SQL_ERROR) {
  98                                         SQLGetDiagField(SQL_HANDLE_STMT, stmt, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
  99                                         for (i=0; i< numfields + 1; i++) {
 100                                                 SQLGetDiagRec(SQL_HANDLE_STMT, stmt, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
 101                                                 ast_log(LOG_WARNING, "SQL Execute returned an error %d: %s: %s (%d)\n", res, state, diagnostic, diagbytes);
 102                                                 if (i > 10) {
 103                                                         ast_log(LOG_WARNING, "Oh, that was good.  There are really %d diagnostics?\n", (int)numfields);
 104                                                         break;
 105                                                 }
 106                                         }
 107                                 }
 108
 109                                 ast_log(LOG_WARNING, "SQL Execute error %d! Attempting a reconnect...\n", res);
 110                                 SQLFreeHandle(SQL_HANDLE_STMT, stmt);
 111
 112                                 obj->up = 0;
 113                                 /*
 114                                  * While this isn't the best way to try to correct an error, this won't automatically
 115                                  * fail when the statement handle invalidates.
 116                                  */
 117                                 /* XXX Actually, it might, if we're using a non-pooled connection. Possible race here. XXX */
 118                                 odbc_obj_disconnect(obj);
 119                                 odbc_obj_connect(obj);
 120                                 continue;
 121                         }
 122                         break;
 123                 } else {
 124                         ast_log(LOG_WARNING, "SQL Prepare failed.  Attempting a reconnect...\n");
 125                         odbc_obj_disconnect(obj);
 126                         odbc_obj_connect(obj);
 127                 }
 128         }
 129
 130         return stmt;
 131 }
 132
 133 int ast_odbc_smart_execute(struct odbc_obj *obj, SQLHSTMT stmt)
 134 {
 135         int res = 0, i;
 136         SQLINTEGER nativeerror=0, numfields=0;
 137         SQLSMALLINT diagbytes=0;
 138         unsigned char state[10], diagnostic[256];
 139
 140         res = SQLExecute(stmt);
 141         if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO) && (res != SQL_NO_DATA)) {
 142                 if (res == SQL_ERROR) {
 143                         SQLGetDiagField(SQL_HANDLE_STMT, stmt, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
 144                         for (i=0; i< numfields + 1; i++) {
 145                                 SQLGetDiagRec(SQL_HANDLE_STMT, stmt, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
 146                                 ast_log(LOG_WARNING, "SQL Execute returned an error %d: %s: %s (%d)\n", res, state, diagnostic, diagbytes);
 147                                 if (i > 10) {
 148                                         ast_log(LOG_WARNING, "Oh, that was good.  There are really %d diagnostics?\n", (int)numfields);
 149                                         break;
 150                                 }
 151                         }
 152                 }
 153 #if 0
 154                 /* This is a really bad method of trying to correct a dead connection.  It
 155                  * only ever really worked with MySQL.  It will not work with any other
 156                  * database, since most databases prepare their statements on the server,
 157                  * and if you disconnect, you invalidate the statement handle.  Hence, if
 158                  * you disconnect, you're going to fail anyway, whether you try to execute
 159                  * a second time or not.
 160                  */
 161                 ast_log(LOG_WARNING, "SQL Execute error %d! Attempting a reconnect...\n", res);
 162                 ast_mutex_lock(&obj->lock);
 163                 obj->up = 0;
 164                 ast_mutex_unlock(&obj->lock);
 165                 odbc_obj_disconnect(obj);
 166                 odbc_obj_connect(obj);
 167                 res = SQLExecute(stmt);
 168 #endif
 169         }
 170
 171         return res;
 172 }
 173
 174
 175 int ast_odbc_sanity_check(struct odbc_obj *obj)
 176 {
 177         char *test_sql = "select 1";
 178         SQLHSTMT stmt;
 179         int res = 0;
 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;
 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 = 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                                 }
 261                         }
 262
 263                         if (enabled && !ast_strlen_zero(dsn)) {
 264                                 new = ast_calloc(1, sizeof(*new));
 265
 266                                 if (!new) {
 267                                         res = -1;
 268                                         break;
 269                                 }
 270
 271                                 if (cat)
 272                                         ast_copy_string(new->name, cat, sizeof(new->name));
 273                                 if (dsn)
 274                                         ast_copy_string(new->dsn, dsn, sizeof(new->dsn));
 275                                 if (username)
 276                                         ast_copy_string(new->username, username, sizeof(new->username));
 277                                 if (password)
 278                                         ast_copy_string(new->password, password, sizeof(new->password));
 279
 280                                 SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &new->env);
 281                                 res = SQLSetEnvAttr(new->env, SQL_ATTR_ODBC_VERSION, (void *) SQL_OV_ODBC3, 0);
 282
 283                                 if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
 284                                         ast_log(LOG_WARNING, "res_odbc: Error SetEnv\n");
 285                                         SQLFreeHandle(SQL_HANDLE_ENV, new->env);
 286                                         return res;
 287                                 }
 288
 289                                 if (pooling) {
 290                                         new->haspool = pooling;
 291                                         if (limit) {
 292                                                 new->limit = limit;
 293                                         } else {
 294                                                 ast_log(LOG_WARNING, "Pooling without also setting a limit is pointless.  Changing limit from 0 to 5.\n");
 295                                                 new->limit = 5;
 296                                         }
 297                                 }
 298
 299                                 odbc_register_class(new, connect);
 300                                 ast_log(LOG_NOTICE, "Registered ODBC class '%s' dsn->[%s]\n", cat, dsn);
 301                         }
 302                 }
 303         }
 304         ast_config_destroy(config);
 305         return res;
 306 }
 307
 308 static int odbc_show_command(int fd, int argc, char **argv)
 309 {
 310         struct odbc_class *class;
 311         struct odbc_obj *current;
 312
 313         AST_LIST_LOCK(&odbc_list);
 314         AST_LIST_TRAVERSE(&odbc_list, class, list) {
 315                 if ((argc == 2) || (argc == 3 && !strcmp(argv[2], "all")) || (!strcmp(argv[2], class->name))) {
 316                         int count = 0;
 317                         ast_cli(fd, "Name: %s\nDSN: %s\n", class->name, class->dsn);
 318
 319                         if (class->haspool) {
 320                                 ast_cli(fd, "Pooled: yes\nLimit: %d\nConnections in use: %d\n", class->limit, class->count);
 321
 322                                 AST_LIST_TRAVERSE(&(class->odbc_obj), current, list) {
 323                                         ast_cli(fd, "  Connection %d: %s", ++count, current->up && ast_odbc_sanity_check(current) ? "connected" : "disconnected");
 324                                 }
 325                         } else {
 326                                 /* Should only ever be one of these */
 327                                 AST_LIST_TRAVERSE(&(class->odbc_obj), current, list) {
 328                                         ast_cli(fd, "Pooled: no\nConnected: %s\n", current->up && ast_odbc_sanity_check(current) ? "yes" : "no");
 329                                 }
 330                         }
 331
 332                                 ast_cli(fd, "\n");
 333                 }
 334         }
 335         AST_LIST_UNLOCK(&odbc_list);
 336
 337         return 0;
 338 }
 339
 340 static char show_usage[] =
 341 "Usage: odbc list [<class>]\n"
 342 "       List settings of a particular ODBC class.\n"
 343 "       or, if not specified, all classes.\n";
 344
 345 static struct ast_cli_entry cli_odbc_show_deprecated = {
 346         { "odbc", "show", NULL },
 347         odbc_show_command, NULL,
 348         NULL };
 349
 350 static struct ast_cli_entry cli_odbc[] = {
 351         { { "odbc", "list", NULL },
 352         odbc_show_command, "List ODBC DSN(s)",
 353         show_usage, NULL, &cli_odbc_show_deprecated },
 354 };
 355
 356 static int odbc_register_class(struct odbc_class *class, int connect)
 357 {
 358         struct odbc_obj *obj;
 359         if (class) {
 360                 AST_LIST_LOCK(&odbc_list);
 361                 AST_LIST_INSERT_HEAD(&odbc_list, class, list);
 362                 AST_LIST_UNLOCK(&odbc_list);
 363
 364                 if (connect) {
 365                         /* Request and release builds a connection */
 366                         obj = ast_odbc_request_obj(class->name, 0);
 367                         ast_odbc_release_obj(obj);
 368                 }
 369
 370                 return 0;
 371         } else {
 372                 ast_log(LOG_WARNING, "Attempted to register a NULL class?\n");
 373                 return -1;
 374         }
 375 }
 376
 377 void ast_odbc_release_obj(struct odbc_obj *obj)
 378 {
 379         /* For pooled connections, this frees the connection to be
 380          * reused.  For non-pooled connections, it does nothing. */
 381         obj->used = 0;
 382 }
 383
 384 struct odbc_obj *ast_odbc_request_obj(const char *name, int check)
 385 {
 386         struct odbc_obj *obj = NULL;
 387         struct odbc_class *class;
 388
 389         AST_LIST_LOCK(&odbc_list);
 390         AST_LIST_TRAVERSE(&odbc_list, class, list) {
 391                 if (!strcmp(class->name, name))
 392                         break;
 393         }
 394         AST_LIST_UNLOCK(&odbc_list);
 395
 396         if (!class)
 397                 return NULL;
 398
 399         AST_LIST_LOCK(&class->odbc_obj);
 400         if (class->haspool) {
 401                 /* Recycle connections before building another */
 402                 AST_LIST_TRAVERSE(&class->odbc_obj, obj, list) {
 403                         if (! obj->used) {
 404                                 obj->used = 1;
 405                                 break;
 406                         }
 407                 }
 408
 409                 if (!obj && (class->count < class->limit)) {
 410                         class->count++;
 411                         obj = ast_calloc(1, sizeof(*obj));
 412                         if (!obj) {
 413                                 AST_LIST_UNLOCK(&class->odbc_obj);
 414                                 return NULL;
 415                         }
 416                         ast_mutex_init(&obj->lock);
 417                         obj->parent = class;
 418                         odbc_obj_connect(obj);
 419                         AST_LIST_INSERT_TAIL(&class->odbc_obj, obj, list);
 420                 }
 421         } else {
 422                 /* Non-pooled connection: multiple modules can use the same connection. */
 423                 AST_LIST_TRAVERSE(&class->odbc_obj, obj, list) {
 424                         /* Non-pooled connection: if there is an entry, return it */
 425                         break;
 426                 }
 427
 428                 if (!obj) {
 429                         /* No entry: build one */
 430                         obj = ast_calloc(1, sizeof(*obj));
 431                         if (!obj) {
 432                                 AST_LIST_UNLOCK(&class->odbc_obj);
 433                                 return NULL;
 434                         }
 435                         ast_mutex_init(&obj->lock);
 436                         obj->parent = class;
 437                         if (odbc_obj_connect(obj) == ODBC_FAIL) {
 438                                 ast_log(LOG_WARNING, "Failed to connect\n");
 439                                 ast_mutex_destroy(&obj->lock);
 440                                 free(obj);
 441                         } else {
 442                                 AST_LIST_INSERT_HEAD(&class->odbc_obj, obj, list);
 443                         }
 444                 }
 445         }
 446         AST_LIST_UNLOCK(&class->odbc_obj);
 447
 448         if (obj && check) {
 449                 ast_odbc_sanity_check(obj);
 450         }
 451         return obj;
 452 }
 453
 454 static odbc_status odbc_obj_disconnect(struct odbc_obj *obj)
 455 {
 456         int res;
 457         ast_mutex_lock(&obj->lock);
 458
 459         res = SQLDisconnect(obj->con);
 460
 461         if (res == ODBC_SUCCESS) {
 462                 ast_log(LOG_WARNING, "res_odbc: disconnected %d from %s [%s]\n", res, obj->parent->name, obj->parent->dsn);
 463         } else {
 464                 ast_log(LOG_WARNING, "res_odbc: %s [%s] already disconnected\n",
 465                 obj->parent->name, obj->parent->dsn);
 466         }
 467         obj->up = 0;
 468         ast_mutex_unlock(&obj->lock);
 469         return ODBC_SUCCESS;
 470 }
 471
 472 static odbc_status odbc_obj_connect(struct odbc_obj *obj)
 473 {
 474         int res;
 475         SQLINTEGER err;
 476         short int mlen;
 477         unsigned char msg[200], stat[10];
 478 #ifdef NEEDTRACE
 479         SQLINTEGER enable = 1;
 480         char *tracefile = "/tmp/odbc.trace";
 481 #endif
 482         ast_mutex_lock(&obj->lock);
 483
 484         res = SQLAllocHandle(SQL_HANDLE_DBC, obj->parent->env, &obj->con);
 485
 486         if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
 487
 488                 ast_log(LOG_WARNING, "res_odbc: Error AllocHDB %d\n", res);
 489                 SQLFreeHandle(SQL_HANDLE_ENV, obj->parent->env);
 490
 491                 ast_mutex_unlock(&obj->lock);
 492                 return ODBC_FAIL;
 493         }
 494         SQLSetConnectAttr(obj->con, SQL_LOGIN_TIMEOUT, (SQLPOINTER *) 10, 0);
 495 #ifdef NEEDTRACE
 496         SQLSetConnectAttr(obj->con, SQL_ATTR_TRACE, &enable, SQL_IS_INTEGER);
 497         SQLSetConnectAttr(obj->con, SQL_ATTR_TRACEFILE, tracefile, strlen(tracefile));
 498 #endif
 499
 500         if (obj->up) {
 501                 odbc_obj_disconnect(obj);
 502                 ast_log(LOG_NOTICE, "Re-connecting %s\n", obj->parent->name);
 503         } else {
 504                 ast_log(LOG_NOTICE, "Connecting %s\n", obj->parent->name);
 505         }
 506
 507         res = SQLConnect(obj->con,
 508                    (SQLCHAR *) obj->parent->dsn, SQL_NTS,
 509                    (SQLCHAR *) obj->parent->username, SQL_NTS,
 510                    (SQLCHAR *) obj->parent->password, SQL_NTS);
 511
 512         if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
 513                 SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, 1, stat, &err, msg, 100, &mlen);
 514                 ast_mutex_unlock(&obj->lock);
 515                 ast_log(LOG_WARNING, "res_odbc: Error SQLConnect=%d errno=%d %s\n", res, (int)err, msg);
 516                 return ODBC_FAIL;
 517         } else {
 518                 ast_log(LOG_NOTICE, "res_odbc: Connected to %s [%s]\n", obj->parent->name, obj->parent->dsn);
 519                 obj->up = 1;
 520         }
 521
 522         ast_mutex_unlock(&obj->lock);
 523         return ODBC_SUCCESS;
 524 }
 525
 526 static int reload(void)
 527 {
 528         static char *cfg = "res_odbc.conf";
 529         struct ast_config *config;
 530         struct ast_variable *v;
 531         char *cat, *dsn, *username, *password;
 532         int enabled, pooling, limit;
 533         int connect = 0, res = 0;
 534
 535         struct odbc_class *new, *class;
 536         struct odbc_obj *current;
 537
 538         /* First, mark all to be purged */
 539         AST_LIST_LOCK(&odbc_list);
 540         AST_LIST_TRAVERSE(&odbc_list, class, list) {
 541                 class->delme = 1;
 542         }
 543
 544         config = ast_config_load(cfg);
 545         if (config) {
 546                 for (cat = ast_category_browse(config, NULL); cat; cat=ast_category_browse(config, cat)) {
 547                         if (!strcasecmp(cat, "ENV")) {
 548                                 for (v = ast_variable_browse(config, cat); v; v = v->next) {
 549                                         setenv(v->name, v->value, 1);
 550                                         ast_log(LOG_NOTICE, "Adding ENV var: %s=%s\n", v->name, v->value);
 551                                 }
 552                         } else {
 553                                 /* Reset all to defaults for each class of odbc connections */
 554                                 dsn = username = password = NULL;
 555                                 enabled = 1;
 556                                 connect = 0;
 557                                 pooling = 0;
 558                                 limit = 0;
 559                                 for (v = ast_variable_browse(config, cat); v; v = v->next) {
 560                                         if (!strcasecmp(v->name, "pooling")) {
 561                                                 pooling = 1;
 562                                         } else if (!strcasecmp(v->name, "limit")) {
 563                                                 sscanf(v->value, "%d", &limit);
 564                                                 if (ast_true(v->value) && !limit) {
 565                                                         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);
 566                                                         limit = 1023;
 567                                                 } else if (ast_false(v->value)) {
 568                                                         ast_log(LOG_WARNING, "Limit should be a number, not a boolean: '%s'.  Disabling ODBC class '%s'.\n", v->value, cat);
 569                                                         enabled = 0;
 570                                                         break;
 571                                                 }
 572                                         } else if (!strcasecmp(v->name, "enabled")) {
 573                                                 enabled = ast_true(v->value);
 574                                         } else if (!strcasecmp(v->name, "pre-connect")) {
 575                                                 connect = ast_true(v->value);
 576                                         } else if (!strcasecmp(v->name, "dsn")) {
 577                                                 dsn = v->value;
 578                                         } else if (!strcasecmp(v->name, "username")) {
 579                                                 username = v->value;
 580                                         } else if (!strcasecmp(v->name, "password")) {
 581                                                 password = v->value;
 582                                         }
 583                                 }
 584
 585                                 if (enabled && !ast_strlen_zero(dsn)) {
 586                                         /* First, check the list to see if it already exists */
 587                                         AST_LIST_TRAVERSE(&odbc_list, class, list) {
 588                                                 if (!strcmp(class->name, cat)) {
 589                                                         class->delme = 0;
 590                                                         break;
 591                                                 }
 592                                         }
 593
 594                                         if (class) {
 595                                                 new = class;
 596                                         } else {
 597                                                 new = ast_calloc(1, sizeof(*new));
 598                                         }
 599
 600                                         if (!new) {
 601                                                 res = -1;
 602                                                 break;
 603                                         }
 604
 605                                         if (cat)
 606                                                 ast_copy_string(new->name, cat, sizeof(new->name));
 607                                         if (dsn)
 608                                                 ast_copy_string(new->dsn, dsn, sizeof(new->dsn));
 609                                         if (username)
 610                                                 ast_copy_string(new->username, username, sizeof(new->username));
 611                                         if (password)
 612                                                 ast_copy_string(new->password, password, sizeof(new->password));
 613
 614                                         if (!class) {
 615                                                 SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &new->env);
 616                                                 res = SQLSetEnvAttr(new->env, SQL_ATTR_ODBC_VERSION, (void *) SQL_OV_ODBC3, 0);
 617
 618                                                 if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
 619                                                         ast_log(LOG_WARNING, "res_odbc: Error SetEnv\n");
 620                                                         SQLFreeHandle(SQL_HANDLE_ENV, new->env);
 621                                                         AST_LIST_UNLOCK(&odbc_list);
 622                                                         return res;
 623                                                 }
 624                                         }
 625
 626                                         if (pooling) {
 627                                                 new->haspool = pooling;
 628                                                 if (limit) {
 629                                                         new->limit = limit;
 630                                                 } else {
 631                                                         ast_log(LOG_WARNING, "Pooling without also setting a limit is pointless.  Changing limit from 0 to 5.\n");
 632                                                         new->limit = 5;
 633                                                 }
 634                                         }
 635
 636                                         if (class) {
 637                                                 ast_log(LOG_NOTICE, "Refreshing ODBC class '%s' dsn->[%s]\n", cat, dsn);
 638                                         } else {
 639                                                 odbc_register_class(new, connect);
 640                                                 ast_log(LOG_NOTICE, "Registered ODBC class '%s' dsn->[%s]\n", cat, dsn);
 641                                         }
 642                                 }
 643                         }
 644                 }
 645                 ast_config_destroy(config);
 646         }
 647
 648         /* Purge classes that we know can go away (pooled with 0, only) */
 649         AST_LIST_TRAVERSE_SAFE_BEGIN(&odbc_list, class, list) {
 650                 if (class->delme && class->haspool && class->count == 0) {
 651                         AST_LIST_TRAVERSE_SAFE_BEGIN(&(class->odbc_obj), current, list) {
 652                                 AST_LIST_REMOVE_CURRENT(&(class->odbc_obj), list);
 653                                 odbc_obj_disconnect(current);
 654                                 ast_mutex_destroy(&current->lock);
 655                                 free(current);
 656                         }
 657                         AST_LIST_TRAVERSE_SAFE_END;
 658
 659                         AST_LIST_REMOVE_CURRENT(&odbc_list, list);
 660                         free(class);
 661                 }
 662         }
 663         AST_LIST_TRAVERSE_SAFE_END;
 664         AST_LIST_UNLOCK(&odbc_list);
 665
 666         return 0;
 667 }
 668
 669 static int unload_module(void)
 670 {
 671         /* Prohibit unloading */
 672         return -1;
 673 }
 674
 675 static int load_module(void)
 676 {
 677         if(load_odbc_config() == -1)
 678                 return AST_MODULE_LOAD_DECLINE;
 679         ast_cli_register_multiple(cli_odbc, sizeof(cli_odbc) / sizeof(struct ast_cli_entry));
 680         ast_log(LOG_NOTICE, "res_odbc loaded.\n");
 681         return 0;
 682 }
 683
 684 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_GLOBAL_SYMBOLS, "ODBC Resource",
 685                 .load = load_module,
 686                 .unload = unload_module,
 687                 .reload = reload,
 688                );