ASTERISK_REGISTER_FILE no longer has any purpose so this commit removes all traces of it. Previously exported symbols removed: * __ast_register_file * __ast_unregister_file * ast_complete_source_filename This also removes the mtx_prof static variable that was declared when MTX_PROFILE was enabled. This variable was only used in lock.c so it is now initialized in that file only. ASTERISK-26480 #close Change-Id: I1074af07d71f9e159c48ef36631aa432c86f9966
1102 lines
34 KiB
C
1102 lines
34 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2012, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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*
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* res_odbc.c <ODBC resource manager>
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* Copyright (C) 2004 - 2005 Anthony Minessale II <anthmct@yahoo.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief ODBC resource manager
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*
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* \author Mark Spencer <markster@digium.com>
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* \author Anthony Minessale II <anthmct@yahoo.com>
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* \author Tilghman Lesher <tilghman@digium.com>
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*
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* \arg See also: \ref cdr_odbc
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*/
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/*! \li \ref res_odbc.c uses the configuration file \ref res_odbc.conf
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* \addtogroup configuration_file Configuration Files
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*/
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/*!
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* \page res_odbc.conf res_odbc.conf
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* \verbinclude res_odbc.conf.sample
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*/
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/*** MODULEINFO
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<depend>generic_odbc</depend>
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<depend>res_odbc_transaction</depend>
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<depend>ltdl</depend>
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<support_level>core</support_level>
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***/
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#include "asterisk.h"
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#include "asterisk/file.h"
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#include "asterisk/channel.h"
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#include "asterisk/config.h"
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#include "asterisk/pbx.h"
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#include "asterisk/module.h"
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#include "asterisk/cli.h"
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#include "asterisk/lock.h"
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#include "asterisk/res_odbc.h"
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#include "asterisk/time.h"
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#include "asterisk/astobj2.h"
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#include "asterisk/app.h"
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#include "asterisk/strings.h"
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#include "asterisk/threadstorage.h"
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#include "asterisk/data.h"
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struct odbc_class
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{
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AST_LIST_ENTRY(odbc_class) list;
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char name[80];
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char dsn[80];
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char *username;
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char *password;
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char *sanitysql;
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SQLHENV env;
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unsigned int delme:1; /*!< Purge the class */
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unsigned int backslash_is_escape:1; /*!< On this database, the backslash is a native escape sequence */
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unsigned int forcecommit:1; /*!< Should uncommitted transactions be auto-committed on handle release? */
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unsigned int isolation; /*!< Flags for how the DB should deal with data in other, uncommitted transactions */
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unsigned int conntimeout; /*!< Maximum time the connection process should take */
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unsigned int maxconnections; /*!< Maximum number of allowed connections */
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/*! When a connection fails, cache that failure for how long? */
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struct timeval negative_connection_cache;
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/*! When a connection fails, when did that last occur? */
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struct timeval last_negative_connect;
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/*! A pool of available connections */
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AST_LIST_HEAD_NOLOCK(, odbc_obj) connections;
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/*! Lock to protect the connections */
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ast_mutex_t lock;
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/*! Condition to notify any pending connection requesters */
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ast_cond_t cond;
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/*! The total number of current connections */
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size_t connection_cnt;
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};
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static struct ao2_container *class_container;
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static AST_RWLIST_HEAD_STATIC(odbc_tables, odbc_cache_tables);
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static odbc_status odbc_obj_connect(struct odbc_obj *obj);
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static odbc_status odbc_obj_disconnect(struct odbc_obj *obj);
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static void odbc_register_class(struct odbc_class *class, int connect);
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AST_THREADSTORAGE(errors_buf);
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struct odbc_txn_frame {
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AST_LIST_ENTRY(odbc_txn_frame) list;
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struct ast_channel *owner;
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struct odbc_obj *obj; /*!< Database handle within which transacted statements are run */
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/*!\brief Is this record the current active transaction within the channel?
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* Note that the active flag is really only necessary for statements which
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* are triggered from the dialplan, as there isn't a direct correlation
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* between multiple statements. Applications wishing to use transactions
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* may simply perform each statement on the same odbc_obj, which keeps the
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* transaction persistent.
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*/
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unsigned int active:1;
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unsigned int forcecommit:1; /*!< Should uncommitted transactions be auto-committed on handle release? */
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unsigned int isolation; /*!< Flags for how the DB should deal with data in other, uncommitted transactions */
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char name[0]; /*!< Name of this transaction ID */
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};
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#define DATA_EXPORT_ODBC_CLASS(MEMBER) \
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MEMBER(odbc_class, name, AST_DATA_STRING) \
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MEMBER(odbc_class, dsn, AST_DATA_STRING) \
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MEMBER(odbc_class, username, AST_DATA_STRING) \
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MEMBER(odbc_class, password, AST_DATA_PASSWORD) \
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MEMBER(odbc_class, forcecommit, AST_DATA_BOOLEAN)
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AST_DATA_STRUCTURE(odbc_class, DATA_EXPORT_ODBC_CLASS);
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const char *ast_odbc_isolation2text(int iso)
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{
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if (iso == SQL_TXN_READ_COMMITTED) {
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return "read_committed";
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} else if (iso == SQL_TXN_READ_UNCOMMITTED) {
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return "read_uncommitted";
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} else if (iso == SQL_TXN_SERIALIZABLE) {
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return "serializable";
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} else if (iso == SQL_TXN_REPEATABLE_READ) {
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return "repeatable_read";
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} else {
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return "unknown";
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}
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}
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int ast_odbc_text2isolation(const char *txt)
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{
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if (strncasecmp(txt, "read_", 5) == 0) {
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if (strncasecmp(txt + 5, "c", 1) == 0) {
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return SQL_TXN_READ_COMMITTED;
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} else if (strncasecmp(txt + 5, "u", 1) == 0) {
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return SQL_TXN_READ_UNCOMMITTED;
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} else {
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return 0;
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}
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} else if (strncasecmp(txt, "ser", 3) == 0) {
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return SQL_TXN_SERIALIZABLE;
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} else if (strncasecmp(txt, "rep", 3) == 0) {
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return SQL_TXN_REPEATABLE_READ;
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} else {
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return 0;
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}
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}
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static void odbc_class_destructor(void *data)
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{
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struct odbc_class *class = data;
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struct odbc_obj *obj;
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/* Due to refcounts, we can safely assume that any objects with a reference
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* to us will prevent our destruction, so we don't need to worry about them.
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*/
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if (class->username) {
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ast_free(class->username);
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}
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if (class->password) {
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ast_free(class->password);
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}
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if (class->sanitysql) {
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ast_free(class->sanitysql);
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}
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while ((obj = AST_LIST_REMOVE_HEAD(&class->connections, list))) {
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ao2_ref(obj, -1);
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}
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SQLFreeHandle(SQL_HANDLE_ENV, class->env);
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ast_mutex_destroy(&class->lock);
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ast_cond_destroy(&class->cond);
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}
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static int null_hash_fn(const void *obj, const int flags)
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{
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return 0;
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}
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static void odbc_obj_destructor(void *data)
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{
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struct odbc_obj *obj = data;
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odbc_obj_disconnect(obj);
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}
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static void destroy_table_cache(struct odbc_cache_tables *table)
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{
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struct odbc_cache_columns *col;
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ast_debug(1, "Destroying table cache for %s\n", table->table);
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AST_RWLIST_WRLOCK(&table->columns);
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while ((col = AST_RWLIST_REMOVE_HEAD(&table->columns, list))) {
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ast_free(col);
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}
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AST_RWLIST_UNLOCK(&table->columns);
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AST_RWLIST_HEAD_DESTROY(&table->columns);
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ast_free(table);
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}
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/*!
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* \brief Find or create an entry describing the table specified.
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* \param database Name of an ODBC class on which to query the table
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* \param tablename Tablename to describe
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* \retval A structure describing the table layout, or NULL, if the table is not found or another error occurs.
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* When a structure is returned, the contained columns list will be
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* rdlock'ed, to ensure that it will be retained in memory.
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*
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* XXX This creates a connection and disconnects it. In some situations, the caller of
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* this function has its own connection and could donate it to this function instead of
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* needing to create another one.
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*
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* XXX The automatic readlock of the columns is awkward. It's done because it's possible for
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* multiple threads to have references to the table, and the table is not refcounted. Possible
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* changes here would be
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* * Eliminate the table cache entirely. The use of ast_odbc_find_table() is generally
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* questionable. The only real good use right now is from ast_realtime_require_field() in
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* order to make sure the DB has the expected columns in it. Since that is only used sparingly,
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* the need to cache tables is questionable. Instead, the table structure can be fetched from
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* the DB directly each time, resulting in a single owner of the data.
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* * Make odbc_cache_tables a refcounted object.
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*
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* \since 1.6.1
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*/
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struct odbc_cache_tables *ast_odbc_find_table(const char *database, const char *tablename)
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{
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struct odbc_cache_tables *tableptr;
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struct odbc_cache_columns *entry;
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char columnname[80];
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SQLLEN sqlptr;
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SQLHSTMT stmt = NULL;
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int res = 0, error = 0;
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struct odbc_obj *obj;
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AST_RWLIST_RDLOCK(&odbc_tables);
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AST_RWLIST_TRAVERSE(&odbc_tables, tableptr, list) {
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if (strcmp(tableptr->connection, database) == 0 && strcmp(tableptr->table, tablename) == 0) {
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break;
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}
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}
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if (tableptr) {
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AST_RWLIST_RDLOCK(&tableptr->columns);
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AST_RWLIST_UNLOCK(&odbc_tables);
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return tableptr;
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}
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if (!(obj = ast_odbc_request_obj(database, 0))) {
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ast_log(LOG_WARNING, "Unable to retrieve database handle for table description '%s@%s'\n", tablename, database);
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AST_RWLIST_UNLOCK(&odbc_tables);
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return NULL;
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}
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/* Table structure not already cached; build it now. */
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do {
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res = SQLAllocHandle(SQL_HANDLE_STMT, obj->con, &stmt);
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if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
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ast_log(LOG_WARNING, "SQL Alloc Handle failed on connection '%s'!\n", database);
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break;
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}
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res = SQLColumns(stmt, NULL, 0, NULL, 0, (unsigned char *)tablename, SQL_NTS, (unsigned char *)"%", SQL_NTS);
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if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
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SQLFreeHandle(SQL_HANDLE_STMT, stmt);
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ast_log(LOG_ERROR, "Unable to query database columns on connection '%s'.\n", database);
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break;
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}
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if (!(tableptr = ast_calloc(sizeof(char), sizeof(*tableptr) + strlen(database) + 1 + strlen(tablename) + 1))) {
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ast_log(LOG_ERROR, "Out of memory creating entry for table '%s' on connection '%s'\n", tablename, database);
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break;
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}
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tableptr->connection = (char *)tableptr + sizeof(*tableptr);
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tableptr->table = (char *)tableptr + sizeof(*tableptr) + strlen(database) + 1;
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strcpy(tableptr->connection, database); /* SAFE */
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strcpy(tableptr->table, tablename); /* SAFE */
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AST_RWLIST_HEAD_INIT(&(tableptr->columns));
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while ((res = SQLFetch(stmt)) != SQL_NO_DATA && res != SQL_ERROR) {
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SQLGetData(stmt, 4, SQL_C_CHAR, columnname, sizeof(columnname), &sqlptr);
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if (!(entry = ast_calloc(sizeof(char), sizeof(*entry) + strlen(columnname) + 1))) {
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ast_log(LOG_ERROR, "Out of memory creating entry for column '%s' in table '%s' on connection '%s'\n", columnname, tablename, database);
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error = 1;
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break;
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}
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entry->name = (char *)entry + sizeof(*entry);
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strcpy(entry->name, columnname);
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SQLGetData(stmt, 5, SQL_C_SHORT, &entry->type, sizeof(entry->type), NULL);
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SQLGetData(stmt, 7, SQL_C_LONG, &entry->size, sizeof(entry->size), NULL);
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SQLGetData(stmt, 9, SQL_C_SHORT, &entry->decimals, sizeof(entry->decimals), NULL);
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SQLGetData(stmt, 10, SQL_C_SHORT, &entry->radix, sizeof(entry->radix), NULL);
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SQLGetData(stmt, 11, SQL_C_SHORT, &entry->nullable, sizeof(entry->nullable), NULL);
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SQLGetData(stmt, 16, SQL_C_LONG, &entry->octetlen, sizeof(entry->octetlen), NULL);
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/* Specification states that the octenlen should be the maximum number of bytes
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* returned in a char or binary column, but it seems that some drivers just set
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* it to NULL. (Bad Postgres! No biscuit!) */
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if (entry->octetlen == 0) {
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entry->octetlen = entry->size;
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}
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ast_debug(3, "Found %s column with type %hd with len %ld, octetlen %ld, and numlen (%hd,%hd)\n", entry->name, entry->type, (long) entry->size, (long) entry->octetlen, entry->decimals, entry->radix);
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/* Insert column info into column list */
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AST_LIST_INSERT_TAIL(&(tableptr->columns), entry, list);
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}
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SQLFreeHandle(SQL_HANDLE_STMT, stmt);
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AST_RWLIST_INSERT_TAIL(&odbc_tables, tableptr, list);
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AST_RWLIST_RDLOCK(&(tableptr->columns));
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break;
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} while (1);
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AST_RWLIST_UNLOCK(&odbc_tables);
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if (error) {
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destroy_table_cache(tableptr);
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tableptr = NULL;
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}
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ast_odbc_release_obj(obj);
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return tableptr;
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}
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struct odbc_cache_columns *ast_odbc_find_column(struct odbc_cache_tables *table, const char *colname)
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{
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struct odbc_cache_columns *col;
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AST_RWLIST_TRAVERSE(&table->columns, col, list) {
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if (strcasecmp(col->name, colname) == 0) {
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return col;
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}
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}
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return NULL;
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}
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int ast_odbc_clear_cache(const char *database, const char *tablename)
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{
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struct odbc_cache_tables *tableptr;
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AST_RWLIST_WRLOCK(&odbc_tables);
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AST_RWLIST_TRAVERSE_SAFE_BEGIN(&odbc_tables, tableptr, list) {
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if (strcmp(tableptr->connection, database) == 0 && strcmp(tableptr->table, tablename) == 0) {
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AST_LIST_REMOVE_CURRENT(list);
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destroy_table_cache(tableptr);
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break;
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}
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}
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AST_RWLIST_TRAVERSE_SAFE_END
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AST_RWLIST_UNLOCK(&odbc_tables);
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return tableptr ? 0 : -1;
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}
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SQLHSTMT ast_odbc_direct_execute(struct odbc_obj *obj, SQLHSTMT (*exec_cb)(struct odbc_obj *obj, void *data), void *data)
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{
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SQLHSTMT stmt;
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stmt = exec_cb(obj, data);
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return stmt;
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}
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SQLHSTMT ast_odbc_prepare_and_execute(struct odbc_obj *obj, SQLHSTMT (*prepare_cb)(struct odbc_obj *obj, void *data), void *data)
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{
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int res = 0;
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SQLHSTMT stmt;
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/* This prepare callback may do more than just prepare -- it may also
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* bind parameters, bind results, etc. The real key, here, is that
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* when we disconnect, all handles become invalid for most databases.
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* We must therefore redo everything when we establish a new
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* connection. */
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stmt = prepare_cb(obj, data);
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if (!stmt) {
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return NULL;
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}
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res = SQLExecute(stmt);
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if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO) && (res != SQL_NO_DATA)) {
|
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if (res == SQL_ERROR) {
|
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ast_odbc_print_errors(SQL_HANDLE_STMT, stmt, "SQL Execute");
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}
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ast_log(LOG_WARNING, "SQL Execute error %d!\n", res);
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SQLFreeHandle(SQL_HANDLE_STMT, stmt);
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stmt = NULL;
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}
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return stmt;
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}
|
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|
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int ast_odbc_smart_execute(struct odbc_obj *obj, SQLHSTMT stmt)
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{
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int res = 0;
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|
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res = SQLExecute(stmt);
|
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if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO) && (res != SQL_NO_DATA)) {
|
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if (res == SQL_ERROR) {
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ast_odbc_print_errors(SQL_HANDLE_STMT, stmt, "SQL Execute");
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}
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}
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|
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return res;
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}
|
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|
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SQLRETURN ast_odbc_ast_str_SQLGetData(struct ast_str **buf, int pmaxlen, SQLHSTMT StatementHandle, SQLUSMALLINT ColumnNumber, SQLSMALLINT TargetType, SQLLEN *StrLen_or_Ind)
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{
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SQLRETURN res;
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if (pmaxlen == 0) {
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if (SQLGetData(StatementHandle, ColumnNumber, TargetType, ast_str_buffer(*buf), 0, StrLen_or_Ind) == SQL_SUCCESS_WITH_INFO) {
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ast_str_make_space(buf, *StrLen_or_Ind + 1);
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}
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} else if (pmaxlen > 0) {
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ast_str_make_space(buf, pmaxlen);
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}
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res = SQLGetData(StatementHandle, ColumnNumber, TargetType, ast_str_buffer(*buf), ast_str_size(*buf), StrLen_or_Ind);
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ast_str_update(*buf);
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return res;
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}
|
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|
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struct ast_str *ast_odbc_print_errors(SQLSMALLINT handle_type, SQLHANDLE handle, const char *operation)
|
|
{
|
|
struct ast_str *errors = ast_str_thread_get(&errors_buf, 16);
|
|
SQLINTEGER nativeerror = 0;
|
|
SQLINTEGER numfields = 0;
|
|
SQLSMALLINT diagbytes = 0;
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|
SQLSMALLINT i;
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|
unsigned char state[10];
|
|
unsigned char diagnostic[256];
|
|
|
|
ast_str_reset(errors);
|
|
SQLGetDiagField(handle_type, handle, 1, SQL_DIAG_NUMBER, &numfields,
|
|
SQL_IS_INTEGER, &diagbytes);
|
|
for (i = 0; i < numfields; i++) {
|
|
SQLGetDiagRec(handle_type, handle, i + 1, state, &nativeerror,
|
|
diagnostic, sizeof(diagnostic), &diagbytes);
|
|
ast_str_append(&errors, 0, "%s%s", ast_str_strlen(errors) ? "," : "", state);
|
|
ast_log(LOG_WARNING, "%s returned an error: %s: %s\n", operation, state, diagnostic);
|
|
/* XXX Why is this here? */
|
|
if (i > 10) {
|
|
ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return errors;
|
|
}
|
|
|
|
unsigned int ast_odbc_class_get_isolation(struct odbc_class *class)
|
|
{
|
|
return class->isolation;
|
|
}
|
|
|
|
unsigned int ast_odbc_class_get_forcecommit(struct odbc_class *class)
|
|
{
|
|
return class->forcecommit;
|
|
}
|
|
|
|
const char *ast_odbc_class_get_name(struct odbc_class *class)
|
|
{
|
|
return class->name;
|
|
}
|
|
|
|
static int load_odbc_config(void)
|
|
{
|
|
static char *cfg = "res_odbc.conf";
|
|
struct ast_config *config;
|
|
struct ast_variable *v;
|
|
char *cat;
|
|
const char *dsn, *username, *password, *sanitysql;
|
|
int enabled, bse, conntimeout, forcecommit, isolation, maxconnections;
|
|
struct timeval ncache = { 0, 0 };
|
|
int preconnect = 0, res = 0;
|
|
struct ast_flags config_flags = { 0 };
|
|
|
|
struct odbc_class *new;
|
|
|
|
config = ast_config_load(cfg, config_flags);
|
|
if (config == CONFIG_STATUS_FILEMISSING || config == CONFIG_STATUS_FILEINVALID) {
|
|
ast_log(LOG_WARNING, "Unable to load config file res_odbc.conf\n");
|
|
return -1;
|
|
}
|
|
for (cat = ast_category_browse(config, NULL); cat; cat=ast_category_browse(config, cat)) {
|
|
if (!strcasecmp(cat, "ENV")) {
|
|
for (v = ast_variable_browse(config, cat); v; v = v->next) {
|
|
setenv(v->name, v->value, 1);
|
|
ast_log(LOG_NOTICE, "Adding ENV var: %s=%s\n", v->name, v->value);
|
|
}
|
|
} else {
|
|
/* Reset all to defaults for each class of odbc connections */
|
|
dsn = username = password = sanitysql = NULL;
|
|
enabled = 1;
|
|
preconnect = 0;
|
|
bse = 1;
|
|
conntimeout = 10;
|
|
forcecommit = 0;
|
|
isolation = SQL_TXN_READ_COMMITTED;
|
|
maxconnections = 1;
|
|
for (v = ast_variable_browse(config, cat); v; v = v->next) {
|
|
if (!strcasecmp(v->name, "pooling") ||
|
|
!strncasecmp(v->name, "share", 5) ||
|
|
!strcasecmp(v->name, "limit") ||
|
|
!strcasecmp(v->name, "idlecheck")) {
|
|
ast_log(LOG_WARNING, "The 'pooling', 'shared_connections', 'limit', and 'idlecheck' options were replaced by 'max_connections'. See res_odbc.conf.sample.\n");
|
|
} else if (!strcasecmp(v->name, "enabled")) {
|
|
enabled = ast_true(v->value);
|
|
} else if (!strcasecmp(v->name, "pre-connect")) {
|
|
preconnect = ast_true(v->value);
|
|
} else if (!strcasecmp(v->name, "dsn")) {
|
|
dsn = v->value;
|
|
} else if (!strcasecmp(v->name, "username")) {
|
|
username = v->value;
|
|
} else if (!strcasecmp(v->name, "password")) {
|
|
password = v->value;
|
|
} else if (!strcasecmp(v->name, "sanitysql")) {
|
|
sanitysql = v->value;
|
|
} else if (!strcasecmp(v->name, "backslash_is_escape")) {
|
|
bse = ast_true(v->value);
|
|
} else if (!strcasecmp(v->name, "connect_timeout")) {
|
|
if (sscanf(v->value, "%d", &conntimeout) != 1 || conntimeout < 1) {
|
|
ast_log(LOG_WARNING, "connect_timeout must be a positive integer\n");
|
|
conntimeout = 10;
|
|
}
|
|
} else if (!strcasecmp(v->name, "negative_connection_cache")) {
|
|
double dncache;
|
|
if (sscanf(v->value, "%lf", &dncache) != 1 || dncache < 0) {
|
|
ast_log(LOG_WARNING, "negative_connection_cache must be a non-negative integer\n");
|
|
/* 5 minutes sounds like a reasonable default */
|
|
ncache.tv_sec = 300;
|
|
ncache.tv_usec = 0;
|
|
} else {
|
|
ncache.tv_sec = (int)dncache;
|
|
ncache.tv_usec = (dncache - ncache.tv_sec) * 1000000;
|
|
}
|
|
} else if (!strcasecmp(v->name, "forcecommit")) {
|
|
forcecommit = ast_true(v->value);
|
|
} else if (!strcasecmp(v->name, "isolation")) {
|
|
if ((isolation = ast_odbc_text2isolation(v->value)) == 0) {
|
|
ast_log(LOG_ERROR, "Unrecognized value for 'isolation': '%s' in section '%s'\n", v->value, cat);
|
|
isolation = SQL_TXN_READ_COMMITTED;
|
|
}
|
|
} else if (!strcasecmp(v->name, "max_connections")) {
|
|
if (sscanf(v->value, "%30d", &maxconnections) != 1 || maxconnections < 1) {
|
|
ast_log(LOG_WARNING, "max_connections must be a positive integer\n");
|
|
maxconnections = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (enabled && !ast_strlen_zero(dsn)) {
|
|
new = ao2_alloc(sizeof(*new), odbc_class_destructor);
|
|
|
|
if (!new) {
|
|
res = -1;
|
|
break;
|
|
}
|
|
|
|
SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &new->env);
|
|
res = SQLSetEnvAttr(new->env, SQL_ATTR_ODBC_VERSION, (void *) SQL_OV_ODBC3, 0);
|
|
|
|
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
|
|
ast_log(LOG_WARNING, "res_odbc: Error SetEnv\n");
|
|
ao2_ref(new, -1);
|
|
return res;
|
|
}
|
|
|
|
new->backslash_is_escape = bse ? 1 : 0;
|
|
new->forcecommit = forcecommit ? 1 : 0;
|
|
new->isolation = isolation;
|
|
new->conntimeout = conntimeout;
|
|
new->negative_connection_cache = ncache;
|
|
new->maxconnections = maxconnections;
|
|
|
|
if (cat)
|
|
ast_copy_string(new->name, cat, sizeof(new->name));
|
|
if (dsn)
|
|
ast_copy_string(new->dsn, dsn, sizeof(new->dsn));
|
|
if (username && !(new->username = ast_strdup(username))) {
|
|
ao2_ref(new, -1);
|
|
break;
|
|
}
|
|
if (password && !(new->password = ast_strdup(password))) {
|
|
ao2_ref(new, -1);
|
|
break;
|
|
}
|
|
if (sanitysql && !(new->sanitysql = ast_strdup(sanitysql))) {
|
|
ao2_ref(new, -1);
|
|
break;
|
|
}
|
|
|
|
ast_mutex_init(&new->lock);
|
|
ast_cond_init(&new->cond, NULL);
|
|
|
|
odbc_register_class(new, preconnect);
|
|
ast_log(LOG_NOTICE, "Registered ODBC class '%s' dsn->[%s]\n", cat, dsn);
|
|
ao2_ref(new, -1);
|
|
new = NULL;
|
|
}
|
|
}
|
|
}
|
|
ast_config_destroy(config);
|
|
return res;
|
|
}
|
|
|
|
static char *handle_cli_odbc_show(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
|
|
{
|
|
struct ao2_iterator aoi;
|
|
struct odbc_class *class;
|
|
int length = 0;
|
|
int which = 0;
|
|
char *ret = NULL;
|
|
|
|
switch (cmd) {
|
|
case CLI_INIT:
|
|
e->command = "odbc show";
|
|
e->usage =
|
|
"Usage: odbc show [class]\n"
|
|
" List settings of a particular ODBC class or,\n"
|
|
" if not specified, all classes.\n";
|
|
return NULL;
|
|
case CLI_GENERATE:
|
|
if (a->pos != 2)
|
|
return NULL;
|
|
length = strlen(a->word);
|
|
aoi = ao2_iterator_init(class_container, 0);
|
|
while ((class = ao2_iterator_next(&aoi))) {
|
|
if (!strncasecmp(a->word, class->name, length) && ++which > a->n) {
|
|
ret = ast_strdup(class->name);
|
|
}
|
|
ao2_ref(class, -1);
|
|
if (ret) {
|
|
break;
|
|
}
|
|
}
|
|
ao2_iterator_destroy(&aoi);
|
|
if (!ret && !strncasecmp(a->word, "all", length) && ++which > a->n) {
|
|
ret = ast_strdup("all");
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
ast_cli(a->fd, "\nODBC DSN Settings\n");
|
|
ast_cli(a->fd, "-----------------\n\n");
|
|
aoi = ao2_iterator_init(class_container, 0);
|
|
while ((class = ao2_iterator_next(&aoi))) {
|
|
if ((a->argc == 2) || (a->argc == 3 && !strcmp(a->argv[2], "all")) || (!strcmp(a->argv[2], class->name))) {
|
|
char timestr[80];
|
|
struct ast_tm tm;
|
|
|
|
ast_cli(a->fd, " Name: %s\n DSN: %s\n", class->name, class->dsn);
|
|
|
|
if (class->last_negative_connect.tv_sec > 0) {
|
|
ast_localtime(&class->last_negative_connect, &tm, NULL);
|
|
ast_strftime(timestr, sizeof(timestr), "%Y-%m-%d %T", &tm);
|
|
ast_cli(a->fd, " Last fail connection attempt: %s\n", timestr);
|
|
}
|
|
|
|
ast_cli(a->fd, " Number of active connections: %zd (out of %d)\n", class->connection_cnt, class->maxconnections);
|
|
ast_cli(a->fd, "\n");
|
|
}
|
|
ao2_ref(class, -1);
|
|
}
|
|
ao2_iterator_destroy(&aoi);
|
|
|
|
return CLI_SUCCESS;
|
|
}
|
|
|
|
static struct ast_cli_entry cli_odbc[] = {
|
|
AST_CLI_DEFINE(handle_cli_odbc_show, "List ODBC DSN(s)")
|
|
};
|
|
|
|
static void odbc_register_class(struct odbc_class *class, int preconnect)
|
|
{
|
|
struct odbc_obj *obj;
|
|
|
|
ao2_link(class_container, class);
|
|
/* I still have a reference in the caller, so a deref is NOT missing here. */
|
|
|
|
if (!preconnect) {
|
|
return;
|
|
}
|
|
|
|
/* Request and release builds a connection */
|
|
obj = ast_odbc_request_obj(class->name, 0);
|
|
if (obj) {
|
|
ast_odbc_release_obj(obj);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
void ast_odbc_release_obj(struct odbc_obj *obj)
|
|
{
|
|
struct odbc_class *class = obj->parent;
|
|
|
|
ast_debug(2, "Releasing ODBC handle %p into pool\n", obj);
|
|
|
|
/* The odbc_obj only holds a reference to the class when it is
|
|
* actively being used. This guarantees no circular reference
|
|
* between odbc_class and odbc_obj. Since it is being released
|
|
* we also release our class reference. If a reload occurred before
|
|
* the class will go away automatically once all odbc_obj are
|
|
* released back.
|
|
*/
|
|
obj->parent = NULL;
|
|
|
|
ast_mutex_lock(&class->lock);
|
|
AST_LIST_INSERT_HEAD(&class->connections, obj, list);
|
|
ast_cond_signal(&class->cond);
|
|
ast_mutex_unlock(&class->lock);
|
|
|
|
ao2_ref(class, -1);
|
|
}
|
|
|
|
int ast_odbc_backslash_is_escape(struct odbc_obj *obj)
|
|
{
|
|
return obj->parent->backslash_is_escape;
|
|
}
|
|
|
|
static int aoro2_class_cb(void *obj, void *arg, int flags)
|
|
{
|
|
struct odbc_class *class = obj;
|
|
char *name = arg;
|
|
if (!strcmp(class->name, name) && !class->delme) {
|
|
return CMP_MATCH | CMP_STOP;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
unsigned int ast_odbc_get_max_connections(const char *name)
|
|
{
|
|
struct odbc_class *class;
|
|
unsigned int max_connections;
|
|
|
|
class = ao2_callback(class_container, 0, aoro2_class_cb, (char *) name);
|
|
if (!class) {
|
|
return 0;
|
|
}
|
|
|
|
max_connections = class->maxconnections;
|
|
ao2_ref(class, -1);
|
|
|
|
return max_connections;
|
|
}
|
|
|
|
/*
|
|
* \brief Determine if the connection has died.
|
|
*
|
|
* \param connection The connection to check
|
|
* \param class The ODBC class
|
|
* \retval 1 Yep, it's dead
|
|
* \retval 0 It's alive and well
|
|
*/
|
|
static int connection_dead(struct odbc_obj *connection, struct odbc_class *class)
|
|
{
|
|
char *test_sql = "select 1";
|
|
SQLINTEGER dead;
|
|
SQLRETURN res;
|
|
SQLHSTMT stmt;
|
|
|
|
res = SQLGetConnectAttr(connection->con, SQL_ATTR_CONNECTION_DEAD, &dead, 0, 0);
|
|
if (SQL_SUCCEEDED(res)) {
|
|
return dead == SQL_CD_TRUE ? 1 : 0;
|
|
}
|
|
|
|
/* If the Driver doesn't support SQL_ATTR_CONNECTION_DEAD do a
|
|
* probing query instead
|
|
*/
|
|
res = SQLAllocHandle(SQL_HANDLE_STMT, connection->con, &stmt);
|
|
if (!SQL_SUCCEEDED(res)) {
|
|
return 1;
|
|
}
|
|
|
|
if (!ast_strlen_zero(class->sanitysql)) {
|
|
test_sql = class->sanitysql;
|
|
}
|
|
|
|
res = SQLPrepare(stmt, (unsigned char *)test_sql, SQL_NTS);
|
|
if (!SQL_SUCCEEDED(res)) {
|
|
SQLFreeHandle(SQL_HANDLE_STMT, stmt);
|
|
return 1;
|
|
}
|
|
|
|
res = SQLExecute(stmt);
|
|
SQLFreeHandle(SQL_HANDLE_STMT, stmt);
|
|
|
|
return SQL_SUCCEEDED(res) ? 0 : 1;
|
|
}
|
|
|
|
struct odbc_obj *_ast_odbc_request_obj2(const char *name, struct ast_flags flags, const char *file, const char *function, int lineno)
|
|
{
|
|
struct odbc_obj *obj = NULL;
|
|
struct odbc_class *class;
|
|
|
|
if (!(class = ao2_callback(class_container, 0, aoro2_class_cb, (char *) name))) {
|
|
ast_debug(1, "Class '%s' not found!\n", name);
|
|
return NULL;
|
|
}
|
|
|
|
ast_mutex_lock(&class->lock);
|
|
|
|
while (!obj) {
|
|
obj = AST_LIST_REMOVE_HEAD(&class->connections, list);
|
|
|
|
if (!obj) {
|
|
if (class->connection_cnt < class->maxconnections) {
|
|
/* If no connection is immediately available establish a new
|
|
* one if allowed. If we try and fail we give up completely as
|
|
* we could go into an infinite loop otherwise.
|
|
*/
|
|
obj = ao2_alloc(sizeof(*obj), odbc_obj_destructor);
|
|
if (!obj) {
|
|
break;
|
|
}
|
|
|
|
obj->parent = ao2_bump(class);
|
|
if (odbc_obj_connect(obj) == ODBC_FAIL) {
|
|
ao2_ref(obj->parent, -1);
|
|
ao2_ref(obj, -1);
|
|
obj = NULL;
|
|
break;
|
|
}
|
|
|
|
class->connection_cnt++;
|
|
ast_debug(2, "Created ODBC handle %p on class '%s', new count is %zd\n", obj,
|
|
name, class->connection_cnt);
|
|
} else {
|
|
/* Otherwise if we're not allowed to create a new one we
|
|
* wait for another thread to give up the connection they
|
|
* own.
|
|
*/
|
|
ast_cond_wait(&class->cond, &class->lock);
|
|
}
|
|
} else if (connection_dead(obj, class)) {
|
|
/* If the connection is dead try to grab another functional one from the
|
|
* pool instead of trying to resurrect this one.
|
|
*/
|
|
ao2_ref(obj, -1);
|
|
obj = NULL;
|
|
class->connection_cnt--;
|
|
ast_debug(2, "ODBC handle %p dead - removing from class '%s', new count is %zd\n",
|
|
obj, name, class->connection_cnt);
|
|
} else {
|
|
/* We successfully grabbed a connection from the pool and all is well!
|
|
*/
|
|
obj->parent = ao2_bump(class);
|
|
ast_debug(2, "Reusing ODBC handle %p from class '%s'\n", obj, name);
|
|
}
|
|
}
|
|
|
|
ast_mutex_unlock(&class->lock);
|
|
ao2_ref(class, -1);
|
|
|
|
return obj;
|
|
}
|
|
|
|
struct odbc_obj *_ast_odbc_request_obj(const char *name, int check, const char *file, const char *function, int lineno)
|
|
{
|
|
struct ast_flags flags = { check ? RES_ODBC_SANITY_CHECK : 0 };
|
|
/* XXX New flow means that the "check" parameter doesn't do anything. We're requesting
|
|
* a connection from ODBC. We'll either get a new one, which obviously is already connected, or
|
|
* we'll get one from the ODBC connection pool. In that case, it will ensure to only give us a
|
|
* live connection
|
|
*/
|
|
return _ast_odbc_request_obj2(name, flags, file, function, lineno);
|
|
}
|
|
|
|
static odbc_status odbc_obj_disconnect(struct odbc_obj *obj)
|
|
{
|
|
int res;
|
|
SQLINTEGER err;
|
|
short int mlen;
|
|
unsigned char msg[200], state[10];
|
|
SQLHDBC con;
|
|
|
|
/* Nothing to disconnect */
|
|
if (!obj->con) {
|
|
return ODBC_SUCCESS;
|
|
}
|
|
|
|
con = obj->con;
|
|
obj->con = NULL;
|
|
res = SQLDisconnect(con);
|
|
|
|
if ((res = SQLFreeHandle(SQL_HANDLE_DBC, con)) == SQL_SUCCESS) {
|
|
ast_debug(3, "Database handle %p (connection %p) deallocated\n", obj, con);
|
|
} else {
|
|
SQLGetDiagRec(SQL_HANDLE_DBC, con, 1, state, &err, msg, 100, &mlen);
|
|
ast_log(LOG_WARNING, "Unable to deallocate database handle %p? %d errno=%d %s\n", con, res, (int)err, msg);
|
|
}
|
|
|
|
return ODBC_SUCCESS;
|
|
}
|
|
|
|
static odbc_status odbc_obj_connect(struct odbc_obj *obj)
|
|
{
|
|
int res;
|
|
SQLINTEGER err;
|
|
short int mlen;
|
|
unsigned char msg[200], state[10];
|
|
#ifdef NEEDTRACE
|
|
SQLINTEGER enable = 1;
|
|
char *tracefile = "/tmp/odbc.trace";
|
|
#endif
|
|
SQLHDBC con;
|
|
long int negative_cache_expiration;
|
|
|
|
ast_assert(obj->con == NULL);
|
|
ast_debug(3, "Connecting %s(%p)\n", obj->parent->name, obj);
|
|
|
|
/* Dont connect while server is marked as unreachable via negative_connection_cache */
|
|
negative_cache_expiration = obj->parent->last_negative_connect.tv_sec + obj->parent->negative_connection_cache.tv_sec;
|
|
if (time(NULL) < negative_cache_expiration) {
|
|
ast_log(LOG_WARNING, "Not connecting to %s. Negative connection cache for %ld seconds\n", obj->parent->name, negative_cache_expiration - time(NULL));
|
|
return ODBC_FAIL;
|
|
}
|
|
|
|
res = SQLAllocHandle(SQL_HANDLE_DBC, obj->parent->env, &con);
|
|
|
|
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
|
|
ast_log(LOG_WARNING, "res_odbc: Error AllocHDB %d\n", res);
|
|
obj->parent->last_negative_connect = ast_tvnow();
|
|
return ODBC_FAIL;
|
|
}
|
|
SQLSetConnectAttr(con, SQL_LOGIN_TIMEOUT, (SQLPOINTER *)(long) obj->parent->conntimeout, 0);
|
|
SQLSetConnectAttr(con, SQL_ATTR_CONNECTION_TIMEOUT, (SQLPOINTER *)(long) obj->parent->conntimeout, 0);
|
|
#ifdef NEEDTRACE
|
|
SQLSetConnectAttr(con, SQL_ATTR_TRACE, &enable, SQL_IS_INTEGER);
|
|
SQLSetConnectAttr(con, SQL_ATTR_TRACEFILE, tracefile, strlen(tracefile));
|
|
#endif
|
|
|
|
res = SQLConnect(con,
|
|
(SQLCHAR *) obj->parent->dsn, SQL_NTS,
|
|
(SQLCHAR *) obj->parent->username, SQL_NTS,
|
|
(SQLCHAR *) obj->parent->password, SQL_NTS);
|
|
|
|
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
|
|
SQLGetDiagRec(SQL_HANDLE_DBC, con, 1, state, &err, msg, 100, &mlen);
|
|
obj->parent->last_negative_connect = ast_tvnow();
|
|
ast_log(LOG_WARNING, "res_odbc: Error SQLConnect=%d errno=%d %s\n", res, (int)err, msg);
|
|
if ((res = SQLFreeHandle(SQL_HANDLE_DBC, con)) != SQL_SUCCESS) {
|
|
SQLGetDiagRec(SQL_HANDLE_DBC, con, 1, state, &err, msg, 100, &mlen);
|
|
ast_log(LOG_WARNING, "Unable to deallocate database handle %p? %d errno=%d %s\n", con, res, (int)err, msg);
|
|
}
|
|
return ODBC_FAIL;
|
|
} else {
|
|
ast_debug(3, "res_odbc: Connected to %s [%s (%p)]\n", obj->parent->name, obj->parent->dsn, obj);
|
|
}
|
|
|
|
obj->con = con;
|
|
return ODBC_SUCCESS;
|
|
}
|
|
|
|
/*!
|
|
* \internal
|
|
* \brief Implements the channels provider.
|
|
*/
|
|
static int data_odbc_provider_handler(const struct ast_data_search *search,
|
|
struct ast_data *root)
|
|
{
|
|
struct ao2_iterator aoi;
|
|
struct odbc_class *class;
|
|
struct ast_data *data_odbc_class, *data_odbc_connections;
|
|
struct ast_data *enum_node;
|
|
|
|
aoi = ao2_iterator_init(class_container, 0);
|
|
while ((class = ao2_iterator_next(&aoi))) {
|
|
data_odbc_class = ast_data_add_node(root, "class");
|
|
if (!data_odbc_class) {
|
|
ao2_ref(class, -1);
|
|
continue;
|
|
}
|
|
|
|
ast_data_add_structure(odbc_class, data_odbc_class, class);
|
|
|
|
data_odbc_connections = ast_data_add_node(data_odbc_class, "connections");
|
|
if (!data_odbc_connections) {
|
|
ao2_ref(class, -1);
|
|
continue;
|
|
}
|
|
|
|
/* isolation */
|
|
enum_node = ast_data_add_node(data_odbc_class, "isolation");
|
|
if (!enum_node) {
|
|
ao2_ref(class, -1);
|
|
continue;
|
|
}
|
|
ast_data_add_int(enum_node, "value", class->isolation);
|
|
ast_data_add_str(enum_node, "text", ast_odbc_isolation2text(class->isolation));
|
|
ao2_ref(class, -1);
|
|
|
|
if (!ast_data_search_match(search, data_odbc_class)) {
|
|
ast_data_remove_node(root, data_odbc_class);
|
|
}
|
|
}
|
|
ao2_iterator_destroy(&aoi);
|
|
return 0;
|
|
}
|
|
|
|
/*!
|
|
* \internal
|
|
* \brief /asterisk/res/odbc/listprovider.
|
|
*/
|
|
static const struct ast_data_handler odbc_provider = {
|
|
.version = AST_DATA_HANDLER_VERSION,
|
|
.get = data_odbc_provider_handler
|
|
};
|
|
|
|
static const struct ast_data_entry odbc_providers[] = {
|
|
AST_DATA_ENTRY("/asterisk/res/odbc", &odbc_provider),
|
|
};
|
|
|
|
static int reload(void)
|
|
{
|
|
struct odbc_cache_tables *table;
|
|
struct odbc_class *class;
|
|
struct ao2_iterator aoi = ao2_iterator_init(class_container, 0);
|
|
|
|
/* First, mark all to be purged */
|
|
while ((class = ao2_iterator_next(&aoi))) {
|
|
class->delme = 1;
|
|
ao2_ref(class, -1);
|
|
}
|
|
ao2_iterator_destroy(&aoi);
|
|
|
|
load_odbc_config();
|
|
|
|
aoi = ao2_iterator_init(class_container, 0);
|
|
while ((class = ao2_iterator_next(&aoi))) {
|
|
if (class->delme) {
|
|
ao2_unlink(class_container, class);
|
|
}
|
|
ao2_ref(class, -1);
|
|
}
|
|
ao2_iterator_destroy(&aoi);
|
|
|
|
/* Empty the cache; it will get rebuilt the next time the tables are needed. */
|
|
AST_RWLIST_WRLOCK(&odbc_tables);
|
|
while ((table = AST_RWLIST_REMOVE_HEAD(&odbc_tables, list))) {
|
|
destroy_table_cache(table);
|
|
}
|
|
AST_RWLIST_UNLOCK(&odbc_tables);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int unload_module(void)
|
|
{
|
|
/* Prohibit unloading */
|
|
return -1;
|
|
}
|
|
|
|
/*!
|
|
* \brief Load the module
|
|
*
|
|
* Module loading including tests for configuration or dependencies.
|
|
* This function can return AST_MODULE_LOAD_FAILURE, AST_MODULE_LOAD_DECLINE,
|
|
* or AST_MODULE_LOAD_SUCCESS. If a dependency or environment variable fails
|
|
* tests return AST_MODULE_LOAD_FAILURE. If the module can not load the
|
|
* configuration file or other non-critical problem return
|
|
* AST_MODULE_LOAD_DECLINE. On success return AST_MODULE_LOAD_SUCCESS.
|
|
*/
|
|
static int load_module(void)
|
|
{
|
|
if (!(class_container = ao2_container_alloc(1, null_hash_fn, ao2_match_by_addr)))
|
|
return AST_MODULE_LOAD_DECLINE;
|
|
if (load_odbc_config() == -1)
|
|
return AST_MODULE_LOAD_DECLINE;
|
|
ast_cli_register_multiple(cli_odbc, ARRAY_LEN(cli_odbc));
|
|
ast_data_register_multiple(odbc_providers, ARRAY_LEN(odbc_providers));
|
|
ast_log(LOG_NOTICE, "res_odbc loaded.\n");
|
|
return 0;
|
|
}
|
|
|
|
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_GLOBAL_SYMBOLS | AST_MODFLAG_LOAD_ORDER, "ODBC resource",
|
|
.support_level = AST_MODULE_SUPPORT_CORE,
|
|
.load = load_module,
|
|
.unload = unload_module,
|
|
.reload = reload,
|
|
.load_pri = AST_MODPRI_REALTIME_DEPEND,
|
|
);
|