https://origsvn.digium.com/svn/asterisk/branches/1.4 ........ r222152 | kpfleming | 2009-10-05 20:16:36 -0500 (Mon, 05 Oct 2009) | 20 lines Fix ao2_iterator API to hold references to containers being iterated. See Mantis issue for details of what prompted this change. Additional notes: This patch changes the ao2_iterator API in two ways: F_AO2I_DONTLOCK has become an enum instead of a macro, with a name that fits our naming policy; also, it is now necessary to call ao2_iterator_destroy() on any iterator that has been created. Currently this only releases the reference to the container being iterated, but in the future this could also release other resources used by the iterator, if the iterator implementation changes to use additional resources. (closes issue #15987) Reported by: kpfleming Review: https://reviewboard.asterisk.org/r/383/ ........ git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@222176 65c4cc65-6c06-0410-ace0-fbb531ad65f3
1703 lines
54 KiB
C
1703 lines
54 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2008, 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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/*** MODULEINFO
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<depend>generic_odbc</depend>
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<depend>ltdl</depend>
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***/
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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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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/*** DOCUMENTATION
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<function name="ODBC" language="en_US">
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<synopsis>
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Controls ODBC transaction properties.
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</synopsis>
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<syntax>
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<parameter name="property" required="true">
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<enumlist>
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<enum name="transaction">
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<para>Gets or sets the active transaction ID. If set, and the transaction ID does not
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exist and a <replaceable>database name</replaceable> is specified as an argument, it will be created.</para>
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</enum>
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<enum name="forcecommit">
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<para>Controls whether a transaction will be automatically committed when the channel
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hangs up. Defaults to false. If a <replaceable>transaction ID</replaceable> is specified in the optional argument,
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the property will be applied to that ID, otherwise to the current active ID.</para>
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</enum>
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<enum name="isolation">
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<para>Controls the data isolation on uncommitted transactions. May be one of the
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following: <literal>read_committed</literal>, <literal>read_uncommitted</literal>,
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<literal>repeatable_read</literal>, or <literal>serializable</literal>. Defaults to the
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database setting in <filename>res_odbc.conf</filename> or <literal>read_committed</literal>
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if not specified. If a <replaceable>transaction ID</replaceable> is specified as an optional argument, it will be
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applied to that ID, otherwise the current active ID.</para>
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</enum>
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</enumlist>
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</parameter>
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<parameter name="argument" required="false" />
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</syntax>
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<description>
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<para>The ODBC() function allows setting several properties to influence how a connected
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database processes transactions.</para>
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</description>
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</function>
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<application name="ODBC_Commit" language="en_US">
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<synopsis>
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Commits a currently open database transaction.
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</synopsis>
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<syntax>
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<parameter name="transaction ID" required="no" />
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</syntax>
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<description>
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<para>Commits the database transaction specified by <replaceable>transaction ID</replaceable>
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or the current active transaction, if not specified.</para>
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</description>
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</application>
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<application name="ODBC_Rollback" language="en_US">
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<synopsis>
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Rollback a currently open database transaction.
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</synopsis>
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<syntax>
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<parameter name="transaction ID" required="no" />
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</syntax>
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<description>
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<para>Rolls back the database transaction specified by <replaceable>transaction ID</replaceable>
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or the current active transaction, if not specified.</para>
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</description>
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</application>
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***/
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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 haspool:1; /*!< Boolean - TDS databases need this */
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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 limit; /*!< Maximum number of database handles we will allow */
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int count; /*!< Running count of pooled connections */
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unsigned int idlecheck; /*!< Recheck the connection if it is idle for this long (in seconds) */
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struct ao2_container *obj_container;
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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 int odbc_register_class(struct odbc_class *class, int connect);
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static void odbc_txn_free(void *data);
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static void odbc_release_obj2(struct odbc_obj *obj, struct odbc_txn_frame *tx);
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AST_THREADSTORAGE(errors_buf);
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static struct ast_datastore_info txn_info = {
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.type = "ODBC_Transaction",
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.destroy = odbc_txn_free,
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};
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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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static const char *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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static int 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 struct odbc_txn_frame *find_transaction(struct ast_channel *chan, struct odbc_obj *obj, const char *name, int active)
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{
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struct ast_datastore *txn_store;
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AST_LIST_HEAD(, odbc_txn_frame) *oldlist;
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struct odbc_txn_frame *txn = NULL;
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if (!chan && obj && obj->txf && obj->txf->owner) {
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chan = obj->txf->owner;
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} else if (!chan) {
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/* No channel == no transaction */
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return NULL;
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}
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ast_channel_lock(chan);
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if ((txn_store = ast_channel_datastore_find(chan, &txn_info, NULL))) {
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oldlist = txn_store->data;
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} else {
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/* Need to create a new datastore */
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if (!(txn_store = ast_datastore_alloc(&txn_info, NULL))) {
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ast_log(LOG_ERROR, "Unable to allocate a new datastore. Cannot create a new transaction.\n");
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ast_channel_unlock(chan);
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return NULL;
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}
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if (!(oldlist = ast_calloc(1, sizeof(*oldlist)))) {
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ast_log(LOG_ERROR, "Unable to allocate datastore list head. Cannot create a new transaction.\n");
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ast_datastore_free(txn_store);
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ast_channel_unlock(chan);
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return NULL;
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}
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txn_store->data = oldlist;
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AST_LIST_HEAD_INIT(oldlist);
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ast_channel_datastore_add(chan, txn_store);
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}
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AST_LIST_LOCK(oldlist);
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ast_channel_unlock(chan);
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/* Scanning for an object is *fast*. Scanning for a name is much slower. */
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if (obj != NULL || active == 1) {
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AST_LIST_TRAVERSE(oldlist, txn, list) {
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if (txn->obj == obj || txn->active) {
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AST_LIST_UNLOCK(oldlist);
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return txn;
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}
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}
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}
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if (name != NULL) {
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AST_LIST_TRAVERSE(oldlist, txn, list) {
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if (!strcasecmp(txn->name, name)) {
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AST_LIST_UNLOCK(oldlist);
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return txn;
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}
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}
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}
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/* Nothing found, create one */
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if (name && obj && (txn = ast_calloc(1, sizeof(*txn) + strlen(name) + 1))) {
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struct odbc_txn_frame *otxn;
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strcpy(txn->name, name); /* SAFE */
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txn->obj = obj;
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txn->isolation = obj->parent->isolation;
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txn->forcecommit = obj->parent->forcecommit;
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txn->owner = chan;
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txn->active = 1;
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/* On creation, the txn becomes active, and all others inactive */
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AST_LIST_TRAVERSE(oldlist, otxn, list) {
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otxn->active = 0;
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}
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AST_LIST_INSERT_TAIL(oldlist, txn, list);
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obj->txf = txn;
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obj->tx = 1;
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}
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AST_LIST_UNLOCK(oldlist);
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return txn;
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}
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static struct odbc_txn_frame *release_transaction(struct odbc_txn_frame *tx)
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{
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if (!tx) {
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return NULL;
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}
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ast_debug(2, "release_transaction(%p) called (tx->obj = %p, tx->obj->txf = %p)\n", tx, tx->obj, tx->obj ? tx->obj->txf : NULL);
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/* If we have an owner, disassociate */
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if (tx->owner) {
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struct ast_datastore *txn_store;
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AST_LIST_HEAD(, odbc_txn_frame) *oldlist;
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ast_channel_lock(tx->owner);
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if ((txn_store = ast_channel_datastore_find(tx->owner, &txn_info, NULL))) {
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oldlist = txn_store->data;
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AST_LIST_LOCK(oldlist);
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AST_LIST_REMOVE(oldlist, tx, list);
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AST_LIST_UNLOCK(oldlist);
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}
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ast_channel_unlock(tx->owner);
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tx->owner = NULL;
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}
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if (tx->obj) {
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/* If we have any uncommitted transactions, they are handled when we release the object */
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struct odbc_obj *obj = tx->obj;
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/* Prevent recursion during destruction */
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tx->obj->txf = NULL;
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tx->obj = NULL;
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odbc_release_obj2(obj, tx);
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}
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ast_free(tx);
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return NULL;
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}
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static void odbc_txn_free(void *vdata)
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{
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struct odbc_txn_frame *tx;
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AST_LIST_HEAD(, odbc_txn_frame) *oldlist = vdata;
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ast_debug(2, "odbc_txn_free(%p) called\n", vdata);
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AST_LIST_LOCK(oldlist);
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while ((tx = AST_LIST_REMOVE_HEAD(oldlist, list))) {
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release_transaction(tx);
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}
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AST_LIST_UNLOCK(oldlist);
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AST_LIST_HEAD_DESTROY(oldlist);
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ast_free(oldlist);
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}
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static int mark_transaction_active(struct ast_channel *chan, struct odbc_txn_frame *tx)
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{
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struct ast_datastore *txn_store;
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AST_LIST_HEAD(, odbc_txn_frame) *oldlist;
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struct odbc_txn_frame *active = NULL, *txn;
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if (!chan && tx && tx->owner) {
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chan = tx->owner;
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}
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ast_channel_lock(chan);
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if (!(txn_store = ast_channel_datastore_find(chan, &txn_info, NULL))) {
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ast_channel_unlock(chan);
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return -1;
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}
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oldlist = txn_store->data;
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AST_LIST_LOCK(oldlist);
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AST_LIST_TRAVERSE(oldlist, txn, list) {
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if (txn == tx) {
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txn->active = 1;
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active = txn;
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} else {
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txn->active = 0;
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}
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}
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AST_LIST_UNLOCK(oldlist);
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ast_channel_unlock(chan);
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return active ? 0 : -1;
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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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/* 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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ao2_ref(class->obj_container, -1);
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SQLFreeHandle(SQL_HANDLE_ENV, class->env);
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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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struct odbc_class *class = obj->parent;
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obj->parent = NULL;
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odbc_obj_disconnect(obj);
|
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ast_mutex_destroy(&obj->lock);
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ao2_ref(class, -1);
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}
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|
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static void destroy_table_cache(struct odbc_cache_tables *table) {
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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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|
|
/*!
|
|
* \brief Find or create an entry describing the table specified.
|
|
* \param database Name of an ODBC class on which to query the table
|
|
* \param tablename Tablename to describe
|
|
* \retval A structure describing the table layout, or NULL, if the table is not found or another error occurs.
|
|
* When a structure is returned, the contained columns list will be
|
|
* rdlock'ed, to ensure that it will be retained in memory.
|
|
* \since 1.6.1
|
|
*/
|
|
struct odbc_cache_tables *ast_odbc_find_table(const char *database, const char *tablename)
|
|
{
|
|
struct odbc_cache_tables *tableptr;
|
|
struct odbc_cache_columns *entry;
|
|
char columnname[80];
|
|
SQLLEN sqlptr;
|
|
SQLHSTMT stmt = NULL;
|
|
int res = 0, error = 0, try = 0;
|
|
struct odbc_obj *obj = ast_odbc_request_obj(database, 0);
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|
|
AST_RWLIST_RDLOCK(&odbc_tables);
|
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AST_RWLIST_TRAVERSE(&odbc_tables, tableptr, list) {
|
|
if (strcmp(tableptr->connection, database) == 0 && strcmp(tableptr->table, tablename) == 0) {
|
|
break;
|
|
}
|
|
}
|
|
if (tableptr) {
|
|
AST_RWLIST_RDLOCK(&tableptr->columns);
|
|
AST_RWLIST_UNLOCK(&odbc_tables);
|
|
if (obj) {
|
|
ast_odbc_release_obj(obj);
|
|
}
|
|
return tableptr;
|
|
}
|
|
|
|
if (!obj) {
|
|
ast_log(LOG_WARNING, "Unable to retrieve database handle for table description '%s@%s'\n", tablename, database);
|
|
AST_RWLIST_UNLOCK(&odbc_tables);
|
|
return NULL;
|
|
}
|
|
|
|
/* Table structure not already cached; build it now. */
|
|
do {
|
|
res = SQLAllocHandle(SQL_HANDLE_STMT, obj->con, &stmt);
|
|
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
|
|
if (try == 0) {
|
|
try = 1;
|
|
ast_odbc_sanity_check(obj);
|
|
continue;
|
|
}
|
|
ast_log(LOG_WARNING, "SQL Alloc Handle failed on connection '%s'!\n", database);
|
|
break;
|
|
}
|
|
|
|
res = SQLColumns(stmt, NULL, 0, NULL, 0, (unsigned char *)tablename, SQL_NTS, (unsigned char *)"%", SQL_NTS);
|
|
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
|
|
if (try == 0) {
|
|
try = 1;
|
|
SQLFreeHandle(SQL_HANDLE_STMT, stmt);
|
|
ast_odbc_sanity_check(obj);
|
|
continue;
|
|
}
|
|
ast_log(LOG_ERROR, "Unable to query database columns on connection '%s'.\n", database);
|
|
break;
|
|
}
|
|
|
|
if (!(tableptr = ast_calloc(sizeof(char), sizeof(*tableptr) + strlen(database) + 1 + strlen(tablename) + 1))) {
|
|
ast_log(LOG_ERROR, "Out of memory creating entry for table '%s' on connection '%s'\n", tablename, database);
|
|
break;
|
|
}
|
|
|
|
tableptr->connection = (char *)tableptr + sizeof(*tableptr);
|
|
tableptr->table = (char *)tableptr + sizeof(*tableptr) + strlen(database) + 1;
|
|
strcpy(tableptr->connection, database); /* SAFE */
|
|
strcpy(tableptr->table, tablename); /* SAFE */
|
|
AST_RWLIST_HEAD_INIT(&(tableptr->columns));
|
|
|
|
while ((res = SQLFetch(stmt)) != SQL_NO_DATA && res != SQL_ERROR) {
|
|
SQLGetData(stmt, 4, SQL_C_CHAR, columnname, sizeof(columnname), &sqlptr);
|
|
|
|
if (!(entry = ast_calloc(sizeof(char), sizeof(*entry) + strlen(columnname) + 1))) {
|
|
ast_log(LOG_ERROR, "Out of memory creating entry for column '%s' in table '%s' on connection '%s'\n", columnname, tablename, database);
|
|
error = 1;
|
|
break;
|
|
}
|
|
entry->name = (char *)entry + sizeof(*entry);
|
|
strcpy(entry->name, columnname);
|
|
|
|
SQLGetData(stmt, 5, SQL_C_SHORT, &entry->type, sizeof(entry->type), NULL);
|
|
SQLGetData(stmt, 7, SQL_C_LONG, &entry->size, sizeof(entry->size), NULL);
|
|
SQLGetData(stmt, 9, SQL_C_SHORT, &entry->decimals, sizeof(entry->decimals), NULL);
|
|
SQLGetData(stmt, 10, SQL_C_SHORT, &entry->radix, sizeof(entry->radix), NULL);
|
|
SQLGetData(stmt, 11, SQL_C_SHORT, &entry->nullable, sizeof(entry->nullable), NULL);
|
|
SQLGetData(stmt, 16, SQL_C_LONG, &entry->octetlen, sizeof(entry->octetlen), NULL);
|
|
|
|
/* Specification states that the octenlen should be the maximum number of bytes
|
|
* returned in a char or binary column, but it seems that some drivers just set
|
|
* it to NULL. (Bad Postgres! No biscuit!) */
|
|
if (entry->octetlen == 0) {
|
|
entry->octetlen = entry->size;
|
|
}
|
|
|
|
ast_verb(10, "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);
|
|
/* Insert column info into column list */
|
|
AST_LIST_INSERT_TAIL(&(tableptr->columns), entry, list);
|
|
}
|
|
SQLFreeHandle(SQL_HANDLE_STMT, stmt);
|
|
|
|
AST_RWLIST_INSERT_TAIL(&odbc_tables, tableptr, list);
|
|
AST_RWLIST_RDLOCK(&(tableptr->columns));
|
|
break;
|
|
} while (1);
|
|
|
|
AST_RWLIST_UNLOCK(&odbc_tables);
|
|
|
|
if (error) {
|
|
destroy_table_cache(tableptr);
|
|
tableptr = NULL;
|
|
}
|
|
if (obj) {
|
|
ast_odbc_release_obj(obj);
|
|
}
|
|
return tableptr;
|
|
}
|
|
|
|
struct odbc_cache_columns *ast_odbc_find_column(struct odbc_cache_tables *table, const char *colname)
|
|
{
|
|
struct odbc_cache_columns *col;
|
|
AST_RWLIST_TRAVERSE(&table->columns, col, list) {
|
|
if (strcasecmp(col->name, colname) == 0) {
|
|
return col;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
int ast_odbc_clear_cache(const char *database, const char *tablename)
|
|
{
|
|
struct odbc_cache_tables *tableptr;
|
|
|
|
AST_RWLIST_WRLOCK(&odbc_tables);
|
|
AST_RWLIST_TRAVERSE_SAFE_BEGIN(&odbc_tables, tableptr, list) {
|
|
if (strcmp(tableptr->connection, database) == 0 && strcmp(tableptr->table, tablename) == 0) {
|
|
AST_LIST_REMOVE_CURRENT(list);
|
|
destroy_table_cache(tableptr);
|
|
break;
|
|
}
|
|
}
|
|
AST_RWLIST_TRAVERSE_SAFE_END
|
|
AST_RWLIST_UNLOCK(&odbc_tables);
|
|
return tableptr ? 0 : -1;
|
|
}
|
|
|
|
SQLHSTMT ast_odbc_direct_execute(struct odbc_obj *obj, SQLHSTMT (*exec_cb)(struct odbc_obj *obj, void *data), void *data)
|
|
{
|
|
int attempt;
|
|
SQLHSTMT stmt;
|
|
|
|
for (attempt = 0; attempt < 2; attempt++) {
|
|
stmt = exec_cb(obj, data);
|
|
|
|
if (stmt) {
|
|
break;
|
|
} else if (obj->tx) {
|
|
ast_log(LOG_WARNING, "Failed to execute, but unable to reconnect, as we're transactional.\n");
|
|
break;
|
|
} else {
|
|
obj->up = 0;
|
|
ast_log(LOG_WARNING, "SQL Exec Direct failed. Attempting a reconnect...\n");
|
|
|
|
odbc_obj_disconnect(obj);
|
|
odbc_obj_connect(obj);
|
|
}
|
|
}
|
|
|
|
return stmt;
|
|
}
|
|
|
|
SQLHSTMT ast_odbc_prepare_and_execute(struct odbc_obj *obj, SQLHSTMT (*prepare_cb)(struct odbc_obj *obj, void *data), void *data)
|
|
{
|
|
int res = 0, i, attempt;
|
|
SQLINTEGER nativeerror=0, numfields=0;
|
|
SQLSMALLINT diagbytes=0;
|
|
unsigned char state[10], diagnostic[256];
|
|
SQLHSTMT stmt;
|
|
|
|
for (attempt = 0; attempt < 2; attempt++) {
|
|
/* This prepare callback may do more than just prepare -- it may also
|
|
* bind parameters, bind results, etc. The real key, here, is that
|
|
* when we disconnect, all handles become invalid for most databases.
|
|
* We must therefore redo everything when we establish a new
|
|
* connection. */
|
|
stmt = prepare_cb(obj, data);
|
|
|
|
if (stmt) {
|
|
res = SQLExecute(stmt);
|
|
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO) && (res != SQL_NO_DATA)) {
|
|
if (res == SQL_ERROR) {
|
|
SQLGetDiagField(SQL_HANDLE_STMT, stmt, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
|
|
for (i = 0; i < numfields; i++) {
|
|
SQLGetDiagRec(SQL_HANDLE_STMT, stmt, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
|
|
ast_log(LOG_WARNING, "SQL Execute returned an error %d: %s: %s (%d)\n", res, state, diagnostic, diagbytes);
|
|
if (i > 10) {
|
|
ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (obj->tx) {
|
|
ast_log(LOG_WARNING, "SQL Execute error, but unable to reconnect, as we're transactional.\n");
|
|
break;
|
|
} else {
|
|
ast_log(LOG_WARNING, "SQL Execute error %d! Attempting a reconnect...\n", res);
|
|
SQLFreeHandle(SQL_HANDLE_STMT, stmt);
|
|
stmt = NULL;
|
|
|
|
obj->up = 0;
|
|
/*
|
|
* While this isn't the best way to try to correct an error, this won't automatically
|
|
* fail when the statement handle invalidates.
|
|
*/
|
|
ast_odbc_sanity_check(obj);
|
|
continue;
|
|
}
|
|
} else {
|
|
obj->last_used = ast_tvnow();
|
|
}
|
|
break;
|
|
} else if (attempt == 0) {
|
|
ast_odbc_sanity_check(obj);
|
|
}
|
|
}
|
|
|
|
return stmt;
|
|
}
|
|
|
|
int ast_odbc_smart_execute(struct odbc_obj *obj, SQLHSTMT stmt)
|
|
{
|
|
int res = 0, i;
|
|
SQLINTEGER nativeerror=0, numfields=0;
|
|
SQLSMALLINT diagbytes=0;
|
|
unsigned char state[10], diagnostic[256];
|
|
|
|
res = SQLExecute(stmt);
|
|
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO) && (res != SQL_NO_DATA)) {
|
|
if (res == SQL_ERROR) {
|
|
SQLGetDiagField(SQL_HANDLE_STMT, stmt, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
|
|
for (i = 0; i < numfields; i++) {
|
|
SQLGetDiagRec(SQL_HANDLE_STMT, stmt, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
|
|
ast_log(LOG_WARNING, "SQL Execute returned an error %d: %s: %s (%d)\n", res, state, diagnostic, diagbytes);
|
|
if (i > 10) {
|
|
ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
} else
|
|
obj->last_used = ast_tvnow();
|
|
|
|
return res;
|
|
}
|
|
|
|
SQLRETURN ast_odbc_ast_str_SQLGetData(struct ast_str **buf, int pmaxlen, SQLHSTMT StatementHandle, SQLUSMALLINT ColumnNumber, SQLSMALLINT TargetType, SQLLEN *StrLen_or_Ind)
|
|
{
|
|
SQLRETURN res;
|
|
|
|
if (pmaxlen == 0) {
|
|
if (SQLGetData(StatementHandle, ColumnNumber, TargetType, ast_str_buffer(*buf), 0, StrLen_or_Ind) == SQL_SUCCESS_WITH_INFO) {
|
|
ast_str_make_space(buf, *StrLen_or_Ind + 1);
|
|
}
|
|
} else if (pmaxlen > 0) {
|
|
ast_str_make_space(buf, pmaxlen);
|
|
}
|
|
res = SQLGetData(StatementHandle, ColumnNumber, TargetType, ast_str_buffer(*buf), ast_str_size(*buf), StrLen_or_Ind);
|
|
ast_str_update(*buf);
|
|
|
|
return res;
|
|
}
|
|
|
|
int ast_odbc_sanity_check(struct odbc_obj *obj)
|
|
{
|
|
char *test_sql = "select 1";
|
|
SQLHSTMT stmt;
|
|
int res = 0;
|
|
|
|
if (!ast_strlen_zero(obj->parent->sanitysql))
|
|
test_sql = obj->parent->sanitysql;
|
|
|
|
if (obj->up) {
|
|
res = SQLAllocHandle(SQL_HANDLE_STMT, obj->con, &stmt);
|
|
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
|
|
obj->up = 0;
|
|
} else {
|
|
res = SQLPrepare(stmt, (unsigned char *)test_sql, SQL_NTS);
|
|
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
|
|
obj->up = 0;
|
|
} else {
|
|
res = SQLExecute(stmt);
|
|
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
|
|
obj->up = 0;
|
|
}
|
|
}
|
|
}
|
|
SQLFreeHandle (SQL_HANDLE_STMT, stmt);
|
|
}
|
|
|
|
if (!obj->up && !obj->tx) { /* Try to reconnect! */
|
|
ast_log(LOG_WARNING, "Connection is down attempting to reconnect...\n");
|
|
odbc_obj_disconnect(obj);
|
|
odbc_obj_connect(obj);
|
|
}
|
|
return obj->up;
|
|
}
|
|
|
|
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, pooling, limit, bse, forcecommit, isolation;
|
|
unsigned int idlecheck;
|
|
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 = idlecheck = 0;
|
|
pooling = 0;
|
|
limit = 0;
|
|
bse = 1;
|
|
forcecommit = 0;
|
|
isolation = SQL_TXN_READ_COMMITTED;
|
|
for (v = ast_variable_browse(config, cat); v; v = v->next) {
|
|
if (!strcasecmp(v->name, "pooling")) {
|
|
if (ast_true(v->value))
|
|
pooling = 1;
|
|
} else if (!strncasecmp(v->name, "share", 5)) {
|
|
/* "shareconnections" is a little clearer in meaning than "pooling" */
|
|
if (ast_false(v->value))
|
|
pooling = 1;
|
|
} else if (!strcasecmp(v->name, "limit")) {
|
|
sscanf(v->value, "%30d", &limit);
|
|
if (ast_true(v->value) && !limit) {
|
|
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);
|
|
limit = 1023;
|
|
} else if (ast_false(v->value)) {
|
|
ast_log(LOG_WARNING, "Limit should be a number, not a boolean: '%s'. Disabling ODBC class '%s'.\n", v->value, cat);
|
|
enabled = 0;
|
|
break;
|
|
}
|
|
} else if (!strcasecmp(v->name, "idlecheck")) {
|
|
sscanf(v->value, "%30u", &idlecheck);
|
|
} 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, "forcecommit")) {
|
|
forcecommit = ast_true(v->value);
|
|
} else if (!strcasecmp(v->name, "isolation")) {
|
|
if ((isolation = 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;
|
|
}
|
|
}
|
|
}
|
|
|
|
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->obj_container = ao2_container_alloc(1, null_hash_fn, ao2_match_by_addr);
|
|
|
|
if (pooling) {
|
|
new->haspool = pooling;
|
|
if (limit) {
|
|
new->limit = limit;
|
|
} else {
|
|
ast_log(LOG_WARNING, "Pooling without also setting a limit is pointless. Changing limit from 0 to 5.\n");
|
|
new->limit = 5;
|
|
}
|
|
}
|
|
|
|
new->backslash_is_escape = bse ? 1 : 0;
|
|
new->forcecommit = forcecommit ? 1 : 0;
|
|
new->isolation = isolation;
|
|
new->idlecheck = idlecheck;
|
|
|
|
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;
|
|
}
|
|
|
|
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 = ao2_iterator_init(class_container, 0);
|
|
struct odbc_class *class;
|
|
struct odbc_obj *current;
|
|
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);
|
|
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))) {
|
|
int count = 0;
|
|
ast_cli(a->fd, " Name: %s\n DSN: %s\n", class->name, class->dsn);
|
|
|
|
if (class->haspool) {
|
|
struct ao2_iterator aoi2 = ao2_iterator_init(class->obj_container, 0);
|
|
|
|
ast_cli(a->fd, " Pooled: Yes\n Limit: %d\n Connections in use: %d\n", class->limit, class->count);
|
|
|
|
while ((current = ao2_iterator_next(&aoi2))) {
|
|
ast_mutex_lock(¤t->lock);
|
|
#ifdef DEBUG_THREADS
|
|
ast_cli(a->fd, " - Connection %d: %s (%s:%d %s)\n", ++count,
|
|
current->used ? "in use" :
|
|
current->up && ast_odbc_sanity_check(current) ? "connected" : "disconnected",
|
|
current->file, current->lineno, current->function);
|
|
#else
|
|
ast_cli(a->fd, " - Connection %d: %s\n", ++count,
|
|
current->used ? "in use" :
|
|
current->up && ast_odbc_sanity_check(current) ? "connected" : "disconnected");
|
|
#endif
|
|
ast_mutex_unlock(¤t->lock);
|
|
ao2_ref(current, -1);
|
|
}
|
|
ao2_iterator_destroy(&aoi2);
|
|
} else {
|
|
/* Should only ever be one of these (unless there are transactions) */
|
|
struct ao2_iterator aoi2 = ao2_iterator_init(class->obj_container, 0);
|
|
while ((current = ao2_iterator_next(&aoi2))) {
|
|
ast_cli(a->fd, " Pooled: No\n Connected: %s\n", current->used ? "In use" :
|
|
current->up && ast_odbc_sanity_check(current) ? "Yes" : "No");
|
|
ao2_ref(current, -1);
|
|
}
|
|
ao2_iterator_destroy(&aoi2);
|
|
}
|
|
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 int odbc_register_class(struct odbc_class *class, int preconnect)
|
|
{
|
|
struct odbc_obj *obj;
|
|
if (class) {
|
|
ao2_link(class_container, class);
|
|
/* I still have a reference in the caller, so a deref is NOT missing here. */
|
|
|
|
if (preconnect) {
|
|
/* Request and release builds a connection */
|
|
obj = ast_odbc_request_obj(class->name, 0);
|
|
if (obj) {
|
|
ast_odbc_release_obj(obj);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
} else {
|
|
ast_log(LOG_WARNING, "Attempted to register a NULL class?\n");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static void odbc_release_obj2(struct odbc_obj *obj, struct odbc_txn_frame *tx)
|
|
{
|
|
SQLINTEGER nativeerror=0, numfields=0;
|
|
SQLSMALLINT diagbytes=0, i;
|
|
unsigned char state[10], diagnostic[256];
|
|
|
|
ast_debug(2, "odbc_release_obj2(%p) called (obj->txf = %p)\n", obj, obj->txf);
|
|
if (tx) {
|
|
ast_debug(1, "called on a transactional handle with %s\n", tx->forcecommit ? "COMMIT" : "ROLLBACK");
|
|
if (SQLEndTran(SQL_HANDLE_DBC, obj->con, tx->forcecommit ? SQL_COMMIT : SQL_ROLLBACK) == SQL_ERROR) {
|
|
/* Handle possible transaction commit failure */
|
|
SQLGetDiagField(SQL_HANDLE_DBC, obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
|
|
for (i = 0; i < numfields; i++) {
|
|
SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
|
|
ast_log(LOG_WARNING, "SQLEndTran returned an error: %s: %s\n", state, diagnostic);
|
|
if (!strcmp((char *)state, "25S02") || !strcmp((char *)state, "08007")) {
|
|
/* These codes mean that a commit failed and a transaction
|
|
* is still active. We must rollback, or things will get
|
|
* very, very weird for anybody using the handle next. */
|
|
SQLEndTran(SQL_HANDLE_DBC, obj->con, SQL_ROLLBACK);
|
|
}
|
|
if (i > 10) {
|
|
ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Transaction is done, reset autocommit */
|
|
if (SQLSetConnectAttr(obj->con, SQL_ATTR_AUTOCOMMIT, (void *)SQL_AUTOCOMMIT_ON, 0) == SQL_ERROR) {
|
|
SQLGetDiagField(SQL_HANDLE_DBC, obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
|
|
for (i = 0; i < numfields; i++) {
|
|
SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
|
|
ast_log(LOG_WARNING, "SetConnectAttr (Autocommit) returned an error: %s: %s\n", state, diagnostic);
|
|
if (i > 10) {
|
|
ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG_THREADS
|
|
obj->file[0] = '\0';
|
|
obj->function[0] = '\0';
|
|
obj->lineno = 0;
|
|
#endif
|
|
|
|
/* For pooled connections, this frees the connection to be
|
|
* reused. For non-pooled connections, it does nothing. */
|
|
obj->used = 0;
|
|
if (obj->txf) {
|
|
/* Prevent recursion -- transaction is already closed out. */
|
|
obj->txf->obj = NULL;
|
|
obj->txf = release_transaction(obj->txf);
|
|
}
|
|
ao2_ref(obj, -1);
|
|
}
|
|
|
|
void ast_odbc_release_obj(struct odbc_obj *obj)
|
|
{
|
|
struct odbc_txn_frame *tx = find_transaction(NULL, obj, NULL, 0);
|
|
odbc_release_obj2(obj, tx);
|
|
}
|
|
|
|
int ast_odbc_backslash_is_escape(struct odbc_obj *obj)
|
|
{
|
|
return obj->parent->backslash_is_escape;
|
|
}
|
|
|
|
static int commit_exec(struct ast_channel *chan, const char *data)
|
|
{
|
|
struct odbc_txn_frame *tx;
|
|
SQLINTEGER nativeerror=0, numfields=0;
|
|
SQLSMALLINT diagbytes=0, i;
|
|
unsigned char state[10], diagnostic[256];
|
|
|
|
if (ast_strlen_zero(data)) {
|
|
tx = find_transaction(chan, NULL, NULL, 1);
|
|
} else {
|
|
tx = find_transaction(chan, NULL, data, 0);
|
|
}
|
|
|
|
pbx_builtin_setvar_helper(chan, "COMMIT_RESULT", "OK");
|
|
|
|
if (tx) {
|
|
if (SQLEndTran(SQL_HANDLE_DBC, tx->obj->con, SQL_COMMIT) == SQL_ERROR) {
|
|
struct ast_str *errors = ast_str_thread_get(&errors_buf, 16);
|
|
ast_str_reset(errors);
|
|
|
|
/* Handle possible transaction commit failure */
|
|
SQLGetDiagField(SQL_HANDLE_DBC, tx->obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
|
|
for (i = 0; i < numfields; i++) {
|
|
SQLGetDiagRec(SQL_HANDLE_DBC, tx->obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
|
|
ast_str_append(&errors, 0, "%s%s", ast_str_strlen(errors) ? "," : "", state);
|
|
ast_log(LOG_WARNING, "SQLEndTran returned an error: %s: %s\n", state, diagnostic);
|
|
if (i > 10) {
|
|
ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
|
|
break;
|
|
}
|
|
}
|
|
pbx_builtin_setvar_helper(chan, "COMMIT_RESULT", ast_str_buffer(errors));
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int rollback_exec(struct ast_channel *chan, const char *data)
|
|
{
|
|
struct odbc_txn_frame *tx;
|
|
SQLINTEGER nativeerror=0, numfields=0;
|
|
SQLSMALLINT diagbytes=0, i;
|
|
unsigned char state[10], diagnostic[256];
|
|
|
|
if (ast_strlen_zero(data)) {
|
|
tx = find_transaction(chan, NULL, NULL, 1);
|
|
} else {
|
|
tx = find_transaction(chan, NULL, data, 0);
|
|
}
|
|
|
|
pbx_builtin_setvar_helper(chan, "ROLLBACK_RESULT", "OK");
|
|
|
|
if (tx) {
|
|
if (SQLEndTran(SQL_HANDLE_DBC, tx->obj->con, SQL_ROLLBACK) == SQL_ERROR) {
|
|
struct ast_str *errors = ast_str_thread_get(&errors_buf, 16);
|
|
ast_str_reset(errors);
|
|
|
|
/* Handle possible transaction commit failure */
|
|
SQLGetDiagField(SQL_HANDLE_DBC, tx->obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
|
|
for (i = 0; i < numfields; i++) {
|
|
SQLGetDiagRec(SQL_HANDLE_DBC, tx->obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
|
|
ast_str_append(&errors, 0, "%s%s", ast_str_strlen(errors) ? "," : "", state);
|
|
ast_log(LOG_WARNING, "SQLEndTran returned an error: %s: %s\n", state, diagnostic);
|
|
if (i > 10) {
|
|
ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
|
|
break;
|
|
}
|
|
}
|
|
pbx_builtin_setvar_helper(chan, "ROLLBACK_RESULT", ast_str_buffer(errors));
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
#define USE_TX (void *)(long)1
|
|
#define NO_TX (void *)(long)2
|
|
#define EOR_TX (void *)(long)3
|
|
|
|
static int aoro2_obj_cb(void *vobj, void *arg, int flags)
|
|
{
|
|
struct odbc_obj *obj = vobj;
|
|
ast_mutex_lock(&obj->lock);
|
|
if ((arg == NO_TX && !obj->tx) || (arg == EOR_TX && !obj->used) || (arg == USE_TX && obj->tx && !obj->used)) {
|
|
obj->used = 1;
|
|
ast_mutex_unlock(&obj->lock);
|
|
return CMP_MATCH | CMP_STOP;
|
|
}
|
|
ast_mutex_unlock(&obj->lock);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef DEBUG_THREADS
|
|
struct odbc_obj *_ast_odbc_request_obj2(const char *name, struct ast_flags flags, const char *file, const char *function, int lineno)
|
|
#else
|
|
struct odbc_obj *ast_odbc_request_obj2(const char *name, struct ast_flags flags)
|
|
#endif
|
|
{
|
|
struct odbc_obj *obj = NULL;
|
|
struct odbc_class *class;
|
|
SQLINTEGER nativeerror=0, numfields=0;
|
|
SQLSMALLINT diagbytes=0, i;
|
|
unsigned char state[10], diagnostic[256];
|
|
|
|
if (!(class = ao2_callback(class_container, 0, aoro2_class_cb, (char *) name))) {
|
|
return NULL;
|
|
}
|
|
|
|
ast_assert(ao2_ref(class, 0) > 1);
|
|
|
|
if (class->haspool) {
|
|
/* Recycle connections before building another */
|
|
obj = ao2_callback(class->obj_container, 0, aoro2_obj_cb, EOR_TX);
|
|
|
|
if (obj) {
|
|
ast_assert(ao2_ref(obj, 0) > 1);
|
|
}
|
|
|
|
if (!obj && (class->count < class->limit)) {
|
|
obj = ao2_alloc(sizeof(*obj), odbc_obj_destructor);
|
|
if (!obj) {
|
|
ao2_ref(class, -1);
|
|
return NULL;
|
|
}
|
|
ast_assert(ao2_ref(obj, 0) == 1);
|
|
ast_mutex_init(&obj->lock);
|
|
/* obj inherits the outstanding reference to class */
|
|
obj->parent = class;
|
|
class = NULL;
|
|
if (odbc_obj_connect(obj) == ODBC_FAIL) {
|
|
ast_log(LOG_WARNING, "Failed to connect to %s\n", name);
|
|
ao2_ref(obj, -1);
|
|
ast_assert(ao2_ref(class, 0) > 0);
|
|
obj = NULL;
|
|
} else {
|
|
obj->used = 1;
|
|
ao2_link(obj->parent->obj_container, obj);
|
|
ast_atomic_fetchadd_int(&obj->parent->count, +1);
|
|
}
|
|
} else {
|
|
/* Object is not constructed, so delete outstanding reference to class. */
|
|
ao2_ref(class, -1);
|
|
class = NULL;
|
|
}
|
|
|
|
if (obj && ast_test_flag(&flags, RES_ODBC_INDEPENDENT_CONNECTION)) {
|
|
/* Ensure this connection has autocommit turned off. */
|
|
if (SQLSetConnectAttr(obj->con, SQL_ATTR_AUTOCOMMIT, (void *)SQL_AUTOCOMMIT_OFF, 0) == SQL_ERROR) {
|
|
SQLGetDiagField(SQL_HANDLE_DBC, obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
|
|
for (i = 0; i < numfields; i++) {
|
|
SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
|
|
ast_log(LOG_WARNING, "SQLSetConnectAttr (Autocommit) returned an error: %s: %s\n", state, diagnostic);
|
|
if (i > 10) {
|
|
ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else if (ast_test_flag(&flags, RES_ODBC_INDEPENDENT_CONNECTION)) {
|
|
/* Non-pooled connections -- but must use a separate connection handle */
|
|
if (!(obj = ao2_callback(class->obj_container, 0, aoro2_obj_cb, USE_TX))) {
|
|
obj = ao2_alloc(sizeof(*obj), odbc_obj_destructor);
|
|
if (!obj) {
|
|
ao2_ref(class, -1);
|
|
return NULL;
|
|
}
|
|
ast_mutex_init(&obj->lock);
|
|
/* obj inherits the outstanding reference to class */
|
|
obj->parent = class;
|
|
class = NULL;
|
|
if (odbc_obj_connect(obj) == ODBC_FAIL) {
|
|
ast_log(LOG_WARNING, "Failed to connect to %s\n", name);
|
|
ao2_ref(obj, -1);
|
|
obj = NULL;
|
|
} else {
|
|
obj->used = 1;
|
|
ao2_link(obj->parent->obj_container, obj);
|
|
ast_atomic_fetchadd_int(&obj->parent->count, +1);
|
|
}
|
|
}
|
|
|
|
if (obj && SQLSetConnectAttr(obj->con, SQL_ATTR_AUTOCOMMIT, (void *)SQL_AUTOCOMMIT_OFF, 0) == SQL_ERROR) {
|
|
SQLGetDiagField(SQL_HANDLE_DBC, obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
|
|
for (i = 0; i < numfields; i++) {
|
|
SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
|
|
ast_log(LOG_WARNING, "SetConnectAttr (Autocommit) returned an error: %s: %s\n", state, diagnostic);
|
|
if (i > 10) {
|
|
ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
/* Non-pooled connection: multiple modules can use the same connection. */
|
|
if ((obj = ao2_callback(class->obj_container, 0, aoro2_obj_cb, NO_TX))) {
|
|
/* Object is not constructed, so delete outstanding reference to class. */
|
|
ast_assert(ao2_ref(class, 0) > 1);
|
|
ao2_ref(class, -1);
|
|
class = NULL;
|
|
} else {
|
|
/* No entry: build one */
|
|
if (!(obj = ao2_alloc(sizeof(*obj), odbc_obj_destructor))) {
|
|
ast_assert(ao2_ref(class, 0) > 1);
|
|
ao2_ref(class, -1);
|
|
return NULL;
|
|
}
|
|
ast_mutex_init(&obj->lock);
|
|
/* obj inherits the outstanding reference to class */
|
|
obj->parent = class;
|
|
class = NULL;
|
|
if (odbc_obj_connect(obj) == ODBC_FAIL) {
|
|
ast_log(LOG_WARNING, "Failed to connect to %s\n", name);
|
|
ao2_ref(obj, -1);
|
|
obj = NULL;
|
|
} else {
|
|
ao2_link(obj->parent->obj_container, obj);
|
|
ast_assert(ao2_ref(obj, 0) > 1);
|
|
}
|
|
}
|
|
|
|
if (obj && SQLSetConnectAttr(obj->con, SQL_ATTR_AUTOCOMMIT, (void *)SQL_AUTOCOMMIT_ON, 0) == SQL_ERROR) {
|
|
SQLGetDiagField(SQL_HANDLE_DBC, obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
|
|
for (i = 0; i < numfields; i++) {
|
|
SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
|
|
ast_log(LOG_WARNING, "SetConnectAttr (Autocommit) returned an error: %s: %s\n", state, diagnostic);
|
|
if (i > 10) {
|
|
ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Set the isolation property */
|
|
if (obj && SQLSetConnectAttr(obj->con, SQL_ATTR_TXN_ISOLATION, (void *)(long)obj->parent->isolation, 0) == SQL_ERROR) {
|
|
SQLGetDiagField(SQL_HANDLE_DBC, obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
|
|
for (i = 0; i < numfields; i++) {
|
|
SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
|
|
ast_log(LOG_WARNING, "SetConnectAttr (Txn isolation) returned an error: %s: %s\n", state, diagnostic);
|
|
if (i > 10) {
|
|
ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (obj && ast_test_flag(&flags, RES_ODBC_SANITY_CHECK)) {
|
|
ast_odbc_sanity_check(obj);
|
|
} else if (obj && obj->parent->idlecheck > 0 && ast_tvdiff_sec(ast_tvnow(), obj->last_used) > obj->parent->idlecheck)
|
|
odbc_obj_connect(obj);
|
|
|
|
#ifdef DEBUG_THREADS
|
|
if (obj) {
|
|
ast_copy_string(obj->file, file, sizeof(obj->file));
|
|
ast_copy_string(obj->function, function, sizeof(obj->function));
|
|
obj->lineno = lineno;
|
|
}
|
|
#endif
|
|
ast_assert(class == NULL);
|
|
|
|
if (obj) {
|
|
ast_assert(ao2_ref(obj, 0) > 1);
|
|
}
|
|
return obj;
|
|
}
|
|
|
|
#ifdef DEBUG_THREADS
|
|
struct odbc_obj *_ast_odbc_request_obj(const char *name, int check, const char *file, const char *function, int lineno)
|
|
#else
|
|
struct odbc_obj *ast_odbc_request_obj(const char *name, int check)
|
|
#endif
|
|
{
|
|
struct ast_flags flags = { check ? RES_ODBC_SANITY_CHECK : 0 };
|
|
#ifdef DEBUG_THREADS
|
|
return _ast_odbc_request_obj2(name, flags, file, function, lineno);
|
|
#else
|
|
return ast_odbc_request_obj2(name, flags);
|
|
#endif
|
|
}
|
|
|
|
struct odbc_obj *ast_odbc_retrieve_transaction_obj(struct ast_channel *chan, const char *objname)
|
|
{
|
|
struct ast_datastore *txn_store;
|
|
AST_LIST_HEAD(, odbc_txn_frame) *oldlist;
|
|
struct odbc_txn_frame *txn = NULL;
|
|
|
|
if (!chan) {
|
|
/* No channel == no transaction */
|
|
return NULL;
|
|
}
|
|
|
|
ast_channel_lock(chan);
|
|
if ((txn_store = ast_channel_datastore_find(chan, &txn_info, NULL))) {
|
|
oldlist = txn_store->data;
|
|
} else {
|
|
ast_channel_unlock(chan);
|
|
return NULL;
|
|
}
|
|
|
|
AST_LIST_LOCK(oldlist);
|
|
ast_channel_unlock(chan);
|
|
|
|
AST_LIST_TRAVERSE(oldlist, txn, list) {
|
|
if (txn->obj && txn->obj->parent && !strcmp(txn->obj->parent->name, objname)) {
|
|
AST_LIST_UNLOCK(oldlist);
|
|
return txn->obj;
|
|
}
|
|
}
|
|
AST_LIST_UNLOCK(oldlist);
|
|
return NULL;
|
|
}
|
|
|
|
static odbc_status odbc_obj_disconnect(struct odbc_obj *obj)
|
|
{
|
|
int res;
|
|
SQLINTEGER err;
|
|
short int mlen;
|
|
unsigned char msg[200], state[10];
|
|
|
|
/* Nothing to disconnect */
|
|
if (!obj->con) {
|
|
return ODBC_SUCCESS;
|
|
}
|
|
|
|
ast_mutex_lock(&obj->lock);
|
|
|
|
res = SQLDisconnect(obj->con);
|
|
|
|
if (obj->parent) {
|
|
if (res == SQL_SUCCESS || res == SQL_SUCCESS_WITH_INFO) {
|
|
ast_log(LOG_DEBUG, "Disconnected %d from %s [%s]\n", res, obj->parent->name, obj->parent->dsn);
|
|
} else {
|
|
ast_log(LOG_DEBUG, "res_odbc: %s [%s] already disconnected\n", obj->parent->name, obj->parent->dsn);
|
|
}
|
|
}
|
|
|
|
if ((res = SQLFreeHandle(SQL_HANDLE_DBC, obj->con) == SQL_SUCCESS)) {
|
|
obj->con = NULL;
|
|
ast_log(LOG_DEBUG, "Database handle deallocated\n");
|
|
} else {
|
|
SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, 1, state, &err, msg, 100, &mlen);
|
|
ast_log(LOG_WARNING, "Unable to deallocate database handle? %d errno=%d %s\n", res, (int)err, msg);
|
|
}
|
|
|
|
obj->up = 0;
|
|
ast_mutex_unlock(&obj->lock);
|
|
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
|
|
ast_mutex_lock(&obj->lock);
|
|
|
|
if (obj->up) {
|
|
odbc_obj_disconnect(obj);
|
|
ast_log(LOG_NOTICE, "Re-connecting %s\n", obj->parent->name);
|
|
} else {
|
|
ast_log(LOG_NOTICE, "Connecting %s\n", obj->parent->name);
|
|
}
|
|
|
|
res = SQLAllocHandle(SQL_HANDLE_DBC, obj->parent->env, &obj->con);
|
|
|
|
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
|
|
ast_log(LOG_WARNING, "res_odbc: Error AllocHDB %d\n", res);
|
|
ast_mutex_unlock(&obj->lock);
|
|
return ODBC_FAIL;
|
|
}
|
|
SQLSetConnectAttr(obj->con, SQL_LOGIN_TIMEOUT, (SQLPOINTER *) 10, 0);
|
|
SQLSetConnectAttr(obj->con, SQL_ATTR_CONNECTION_TIMEOUT, (SQLPOINTER *) 10, 0);
|
|
#ifdef NEEDTRACE
|
|
SQLSetConnectAttr(obj->con, SQL_ATTR_TRACE, &enable, SQL_IS_INTEGER);
|
|
SQLSetConnectAttr(obj->con, SQL_ATTR_TRACEFILE, tracefile, strlen(tracefile));
|
|
#endif
|
|
|
|
res = SQLConnect(obj->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, obj->con, 1, state, &err, msg, 100, &mlen);
|
|
ast_mutex_unlock(&obj->lock);
|
|
ast_log(LOG_WARNING, "res_odbc: Error SQLConnect=%d errno=%d %s\n", res, (int)err, msg);
|
|
return ODBC_FAIL;
|
|
} else {
|
|
ast_log(LOG_NOTICE, "res_odbc: Connected to %s [%s]\n", obj->parent->name, obj->parent->dsn);
|
|
obj->up = 1;
|
|
obj->last_used = ast_tvnow();
|
|
}
|
|
|
|
ast_mutex_unlock(&obj->lock);
|
|
return ODBC_SUCCESS;
|
|
}
|
|
|
|
static int acf_transaction_read(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len)
|
|
{
|
|
AST_DECLARE_APP_ARGS(args,
|
|
AST_APP_ARG(property);
|
|
AST_APP_ARG(opt);
|
|
);
|
|
struct odbc_txn_frame *tx;
|
|
|
|
AST_STANDARD_APP_ARGS(args, data);
|
|
if (strcasecmp(args.property, "transaction") == 0) {
|
|
if ((tx = find_transaction(chan, NULL, NULL, 1))) {
|
|
ast_copy_string(buf, tx->name, len);
|
|
return 0;
|
|
}
|
|
} else if (strcasecmp(args.property, "isolation") == 0) {
|
|
if (!ast_strlen_zero(args.opt)) {
|
|
tx = find_transaction(chan, NULL, args.opt, 0);
|
|
} else {
|
|
tx = find_transaction(chan, NULL, NULL, 1);
|
|
}
|
|
if (tx) {
|
|
ast_copy_string(buf, isolation2text(tx->isolation), len);
|
|
return 0;
|
|
}
|
|
} else if (strcasecmp(args.property, "forcecommit") == 0) {
|
|
if (!ast_strlen_zero(args.opt)) {
|
|
tx = find_transaction(chan, NULL, args.opt, 0);
|
|
} else {
|
|
tx = find_transaction(chan, NULL, NULL, 1);
|
|
}
|
|
if (tx) {
|
|
ast_copy_string(buf, tx->forcecommit ? "1" : "0", len);
|
|
return 0;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static int acf_transaction_write(struct ast_channel *chan, const char *cmd, char *s, const char *value)
|
|
{
|
|
AST_DECLARE_APP_ARGS(args,
|
|
AST_APP_ARG(property);
|
|
AST_APP_ARG(opt);
|
|
);
|
|
struct odbc_txn_frame *tx;
|
|
SQLINTEGER nativeerror=0, numfields=0;
|
|
SQLSMALLINT diagbytes=0, i;
|
|
unsigned char state[10], diagnostic[256];
|
|
|
|
AST_STANDARD_APP_ARGS(args, s);
|
|
if (strcasecmp(args.property, "transaction") == 0) {
|
|
/* Set active transaction */
|
|
struct odbc_obj *obj;
|
|
if ((tx = find_transaction(chan, NULL, value, 0))) {
|
|
mark_transaction_active(chan, tx);
|
|
} else {
|
|
/* No such transaction, create one */
|
|
struct ast_flags flags = { RES_ODBC_INDEPENDENT_CONNECTION };
|
|
if (ast_strlen_zero(args.opt) || !(obj = ast_odbc_request_obj2(args.opt, flags))) {
|
|
ast_log(LOG_ERROR, "Could not create transaction: invalid database specification '%s'\n", S_OR(args.opt, ""));
|
|
pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "INVALID_DB");
|
|
return -1;
|
|
}
|
|
if (!(tx = find_transaction(chan, obj, value, 0))) {
|
|
pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "FAILED_TO_CREATE");
|
|
return -1;
|
|
}
|
|
obj->tx = 1;
|
|
}
|
|
pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "OK");
|
|
return 0;
|
|
} else if (strcasecmp(args.property, "forcecommit") == 0) {
|
|
/* Set what happens when an uncommitted transaction ends without explicit Commit or Rollback */
|
|
if (ast_strlen_zero(args.opt)) {
|
|
tx = find_transaction(chan, NULL, NULL, 1);
|
|
} else {
|
|
tx = find_transaction(chan, NULL, args.opt, 0);
|
|
}
|
|
if (!tx) {
|
|
pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "FAILED_TO_CREATE");
|
|
return -1;
|
|
}
|
|
if (ast_true(value)) {
|
|
tx->forcecommit = 1;
|
|
} else if (ast_false(value)) {
|
|
tx->forcecommit = 0;
|
|
} else {
|
|
ast_log(LOG_ERROR, "Invalid value for forcecommit: '%s'\n", S_OR(value, ""));
|
|
pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "INVALID_VALUE");
|
|
return -1;
|
|
}
|
|
|
|
pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "OK");
|
|
return 0;
|
|
} else if (strcasecmp(args.property, "isolation") == 0) {
|
|
/* How do uncommitted transactions affect reads? */
|
|
int isolation = text2isolation(value);
|
|
if (ast_strlen_zero(args.opt)) {
|
|
tx = find_transaction(chan, NULL, NULL, 1);
|
|
} else {
|
|
tx = find_transaction(chan, NULL, args.opt, 0);
|
|
}
|
|
if (!tx) {
|
|
pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "FAILED_TO_CREATE");
|
|
return -1;
|
|
}
|
|
if (isolation == 0) {
|
|
pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "INVALID_VALUE");
|
|
ast_log(LOG_ERROR, "Invalid isolation specification: '%s'\n", S_OR(value, ""));
|
|
} else if (SQLSetConnectAttr(tx->obj->con, SQL_ATTR_TXN_ISOLATION, (void *)(long)isolation, 0) == SQL_ERROR) {
|
|
pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "SQL_ERROR");
|
|
SQLGetDiagField(SQL_HANDLE_DBC, tx->obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
|
|
for (i = 0; i < numfields; i++) {
|
|
SQLGetDiagRec(SQL_HANDLE_DBC, tx->obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
|
|
ast_log(LOG_WARNING, "SetConnectAttr (Txn isolation) returned an error: %s: %s\n", state, diagnostic);
|
|
if (i > 10) {
|
|
ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "OK");
|
|
tx->isolation = isolation;
|
|
}
|
|
return 0;
|
|
} else {
|
|
ast_log(LOG_ERROR, "Unknown property: '%s'\n", args.property);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static struct ast_custom_function odbc_function = {
|
|
.name = "ODBC",
|
|
.read = acf_transaction_read,
|
|
.write = acf_transaction_write,
|
|
};
|
|
|
|
static const char * const app_commit = "ODBC_Commit";
|
|
static const char * const app_rollback = "ODBC_Rollback";
|
|
|
|
static int reload(void)
|
|
{
|
|
struct odbc_cache_tables *table;
|
|
struct odbc_class *class;
|
|
struct odbc_obj *current;
|
|
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();
|
|
|
|
/* Purge remaining classes */
|
|
|
|
/* Note on how this works; this is a case of circular references, so we
|
|
* explicitly do NOT want to use a callback here (or we wind up in
|
|
* recursive hell).
|
|
*
|
|
* 1. Iterate through all the classes. Note that the classes will currently
|
|
* contain two classes of the same name, one of which is marked delme and
|
|
* will be purged when all remaining objects of the class are released, and
|
|
* the other, which was created above when we re-parsed the config file.
|
|
* 2. On each class, there is a reference held by the master container and
|
|
* a reference held by each connection object. There are two cases for
|
|
* destruction of the class, noted below. However, in all cases, all O-refs
|
|
* (references to objects) will first be freed, which will cause the C-refs
|
|
* (references to classes) to be decremented (but never to 0, because the
|
|
* class container still has a reference).
|
|
* a) If the class has outstanding objects, the C-ref by the class
|
|
* container will then be freed, which leaves only C-refs by any
|
|
* outstanding objects. When the final outstanding object is released
|
|
* (O-refs held by applications and dialplan functions), it will in turn
|
|
* free the final C-ref, causing class destruction.
|
|
* b) If the class has no outstanding objects, when the class container
|
|
* removes the final C-ref, the class will be destroyed.
|
|
*/
|
|
aoi = ao2_iterator_init(class_container, 0);
|
|
while ((class = ao2_iterator_next(&aoi))) { /* C-ref++ (by iterator) */
|
|
if (class->delme) {
|
|
struct ao2_iterator aoi2 = ao2_iterator_init(class->obj_container, 0);
|
|
while ((current = ao2_iterator_next(&aoi2))) { /* O-ref++ (by iterator) */
|
|
ao2_unlink(class->obj_container, current); /* unlink O-ref from class (reference handled implicitly) */
|
|
ao2_ref(current, -1); /* O-ref-- (by iterator) */
|
|
/* At this point, either
|
|
* a) there's an outstanding O-ref, or
|
|
* b) the object has already been destroyed.
|
|
*/
|
|
}
|
|
ao2_iterator_destroy(&aoi2);
|
|
ao2_unlink(class_container, class); /* unlink C-ref from container (reference handled implicitly) */
|
|
/* At this point, either
|
|
* a) there's an outstanding O-ref, which holds an outstanding C-ref, or
|
|
* b) the last remaining C-ref is held by the iterator, which will be
|
|
* destroyed in the next step.
|
|
*/
|
|
}
|
|
ao2_ref(class, -1); /* C-ref-- (by iterator) */
|
|
}
|
|
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;
|
|
}
|
|
|
|
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_register_application_xml(app_commit, commit_exec);
|
|
ast_register_application_xml(app_rollback, rollback_exec);
|
|
ast_custom_function_register(&odbc_function);
|
|
ast_log(LOG_NOTICE, "res_odbc loaded.\n");
|
|
return 0;
|
|
}
|
|
|
|
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_GLOBAL_SYMBOLS, "ODBC resource",
|
|
.load = load_module,
|
|
.unload = unload_module,
|
|
.reload = reload,
|
|
);
|