2006-03-25 06:14:10 +00:00
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/*
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* Asterisk -- An open source telephony toolkit.
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*
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2006-03-26 23:45:53 +00:00
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* Copyright (C) 2006, Sergey Basmanov
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2006-03-25 06:14:10 +00:00
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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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2006-03-26 23:45:53 +00:00
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* \brief ChannelRedirect application
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2006-03-25 06:14:10 +00:00
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*
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* \author Sergey Basmanov <sergey_basmanov@mail.ru>
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2006-03-26 23:45:53 +00:00
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*
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2006-03-25 06:14:10 +00:00
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* \ingroup applications
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*/
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2011-07-14 20:28:54 +00:00
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/*** MODULEINFO
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<support_level>core</support_level>
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***/
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2006-06-07 18:54:56 +00:00
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#include "asterisk.h"
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git migration: Refactor the ASTERISK_FILE_VERSION macro
Git does not support the ability to replace a token with a version
string during check-in. While it does have support for replacing a
token on clone, this is somewhat sub-optimal: the token is replaced
with the object hash, which is not particularly easy for human
consumption. What's more, in practice, the source file version was often
not terribly useful. Generally, when triaging bugs, the overall version
of Asterisk is far more useful than an individual SVN version of a file. As a
result, this patch removes Asterisk's support for showing source file
versions.
Specifically, it does the following:
* Rename ASTERISK_FILE_VERSION macro to ASTERISK_REGISTER_FILE, and
remove passing the version in with the macro. Other facilities
than 'core show file version' make use of the file names, such as
setting a debug level only on a specific file. As such, the act of
registering source files with the Asterisk core still has use. The
macro rename now reflects the new macro purpose.
* main/asterisk:
- Refactor the file_version structure to reflect that it no longer
tracks a version field.
- Remove the "core show file version" CLI command. Without the file
version, it is no longer useful.
- Remove the ast_file_version_find function. The file version is no
longer tracked.
- Rename ast_register_file_version/ast_unregister_file_version to
ast_register_file/ast_unregister_file, respectively.
* main/manager: Remove value from the Version key of the ModuleCheck
Action. The actual key itself has not been removed, as doing so would
absolutely constitute a backwards incompatible change. However, since
the file version is no longer tracked, there is no need to attempt to
include it in the Version key.
* UPGRADE: Add notes for:
- Modification to the ModuleCheck AMI Action
- Removal of the "core show file version" CLI command
Change-Id: I6cf0ff280e1668bf4957dc21f32a5ff43444a40e
2015-04-12 02:38:22 +00:00
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ASTERISK_REGISTER_FILE()
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2006-06-07 18:54:56 +00:00
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2006-03-25 06:14:10 +00:00
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#include "asterisk/file.h"
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#include "asterisk/channel.h"
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#include "asterisk/pbx.h"
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#include "asterisk/module.h"
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#include "asterisk/lock.h"
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#include "asterisk/app.h"
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#include "asterisk/features.h"
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2008-11-01 21:10:07 +00:00
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/*** DOCUMENTATION
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<application name="ChannelRedirect" language="en_US">
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<synopsis>
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Redirects given channel to a dialplan target
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</synopsis>
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<syntax>
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<parameter name="channel" required="true" />
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<parameter name="context" required="false" />
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<parameter name="extension" required="false" />
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<parameter name="priority" required="true" />
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</syntax>
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<description>
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<para>Sends the specified channel to the specified extension priority</para>
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<para>This application sets the following channel variables upon completion</para>
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<variablelist>
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<variable name="CHANNELREDIRECT_STATUS">
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<value name="NOCHANNEL" />
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<value name="SUCCESS" />
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<para>Are set to the result of the redirection</para>
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</variable>
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</variablelist>
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</description>
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</application>
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***/
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2009-06-07 14:55:51 +00:00
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static const char app[] = "ChannelRedirect";
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2006-03-25 06:14:10 +00:00
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2009-05-21 21:13:09 +00:00
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static int asyncgoto_exec(struct ast_channel *chan, const char *data)
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2006-03-25 06:14:10 +00:00
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{
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2006-03-26 23:45:53 +00:00
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int res = -1;
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2007-07-23 19:51:41 +00:00
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char *info;
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2006-03-25 06:14:10 +00:00
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struct ast_channel *chan2 = NULL;
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AST_DECLARE_APP_ARGS(args,
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AST_APP_ARG(channel);
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AST_APP_ARG(label);
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);
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if (ast_strlen_zero(data)) {
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2007-07-23 19:51:41 +00:00
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ast_log(LOG_WARNING, "%s requires an argument (channel,[[context,]exten,]priority)\n", app);
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2006-03-25 06:14:10 +00:00
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return -1;
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}
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info = ast_strdupa(data);
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AST_STANDARD_APP_ARGS(args, info);
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if (ast_strlen_zero(args.channel) || ast_strlen_zero(args.label)) {
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2007-07-23 19:51:41 +00:00
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ast_log(LOG_WARNING, "%s requires an argument (channel,[[context,]exten,]priority)\n", app);
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2008-02-01 06:14:29 +00:00
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return -1;
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2006-03-25 06:14:10 +00:00
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}
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Convert the ast_channel data structure over to the astobj2 framework.
There is a lot that could be said about this, but the patch is a big
improvement for performance, stability, code maintainability,
and ease of future code development.
The channel list is no longer an unsorted linked list. The main container
for channels is an astobj2 hash table. All of the code related to searching
for channels or iterating active channels has been rewritten. Let n be
the number of active channels. Iterating the channel list has gone from
O(n^2) to O(n). Searching for a channel by name went from O(n) to O(1).
Searching for a channel by extension is still O(n), but uses a new method
for doing so, which is more efficient.
The ast_channel object is now a reference counted object. The benefits
here are plentiful. Some benefits directly related to issues in the
previous code include:
1) When threads other than the channel thread owning a channel wanted
access to a channel, it had to hold the lock on it to ensure that it didn't
go away. This is no longer a requirement. Holding a reference is
sufficient.
2) There are places that now require less dealing with channel locks.
3) There are places where channel locks are held for much shorter periods
of time.
4) There are places where dealing with more than one channel at a time becomes
_MUCH_ easier. ChanSpy is a great example of this. Writing code in the
future that deals with multiple channels will be much easier.
Some additional information regarding channel locking and reference count
handling can be found in channel.h, where a new section has been added that
discusses some of the rules associated with it.
Mark Michelson also assisted with the development of this patch. He did the
conversion of ChanSpy and introduced a new API, ast_autochan, which makes it
much easier to deal with holding on to a channel pointer for an extended period
of time and having it get automatically updated if the channel gets masqueraded.
Mark was also a huge help in the code review process.
Thanks to David Vossel for his assistance with this branch, as well. David
did the conversion of the DAHDIScan application by making it become a wrapper
for ChanSpy internally.
The changes come from the svn/asterisk/team/russell/ast_channel_ao2 branch.
Review: http://reviewboard.digium.com/r/203/
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@190423 65c4cc65-6c06-0410-ace0-fbb531ad65f3
2009-04-24 14:04:26 +00:00
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if (!(chan2 = ast_channel_get_by_name(args.channel))) {
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2006-03-25 06:14:10 +00:00
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ast_log(LOG_WARNING, "No such channel: %s\n", args.channel);
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2008-02-19 18:40:22 +00:00
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pbx_builtin_setvar_helper(chan, "CHANNELREDIRECT_STATUS", "NOCHANNEL");
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return 0;
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2006-03-25 06:14:10 +00:00
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}
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2008-02-18 15:47:00 +00:00
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res = ast_async_parseable_goto(chan2, args.label);
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Convert the ast_channel data structure over to the astobj2 framework.
There is a lot that could be said about this, but the patch is a big
improvement for performance, stability, code maintainability,
and ease of future code development.
The channel list is no longer an unsorted linked list. The main container
for channels is an astobj2 hash table. All of the code related to searching
for channels or iterating active channels has been rewritten. Let n be
the number of active channels. Iterating the channel list has gone from
O(n^2) to O(n). Searching for a channel by name went from O(n) to O(1).
Searching for a channel by extension is still O(n), but uses a new method
for doing so, which is more efficient.
The ast_channel object is now a reference counted object. The benefits
here are plentiful. Some benefits directly related to issues in the
previous code include:
1) When threads other than the channel thread owning a channel wanted
access to a channel, it had to hold the lock on it to ensure that it didn't
go away. This is no longer a requirement. Holding a reference is
sufficient.
2) There are places that now require less dealing with channel locks.
3) There are places where channel locks are held for much shorter periods
of time.
4) There are places where dealing with more than one channel at a time becomes
_MUCH_ easier. ChanSpy is a great example of this. Writing code in the
future that deals with multiple channels will be much easier.
Some additional information regarding channel locking and reference count
handling can be found in channel.h, where a new section has been added that
discusses some of the rules associated with it.
Mark Michelson also assisted with the development of this patch. He did the
conversion of ChanSpy and introduced a new API, ast_autochan, which makes it
much easier to deal with holding on to a channel pointer for an extended period
of time and having it get automatically updated if the channel gets masqueraded.
Mark was also a huge help in the code review process.
Thanks to David Vossel for his assistance with this branch, as well. David
did the conversion of the DAHDIScan application by making it become a wrapper
for ChanSpy internally.
The changes come from the svn/asterisk/team/russell/ast_channel_ao2 branch.
Review: http://reviewboard.digium.com/r/203/
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@190423 65c4cc65-6c06-0410-ace0-fbb531ad65f3
2009-04-24 14:04:26 +00:00
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chan2 = ast_channel_unref(chan2);
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2008-02-19 18:40:22 +00:00
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pbx_builtin_setvar_helper(chan, "CHANNELREDIRECT_STATUS", "SUCCESS");
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2006-03-25 06:14:10 +00:00
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return res;
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}
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2006-08-21 02:11:39 +00:00
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static int unload_module(void)
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2006-03-25 06:14:10 +00:00
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{
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2007-07-16 13:35:20 +00:00
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return ast_unregister_application(app);
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2006-03-25 06:14:10 +00:00
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}
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2006-08-21 02:11:39 +00:00
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static int load_module(void)
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2006-03-25 06:14:10 +00:00
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{
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2008-11-01 21:10:07 +00:00
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return ast_register_application_xml(app, asyncgoto_exec) ?
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2008-06-03 19:48:37 +00:00
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AST_MODULE_LOAD_DECLINE : AST_MODULE_LOAD_SUCCESS;
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2006-03-25 06:14:10 +00:00
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}
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2007-05-30 05:17:09 +00:00
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AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Redirects a given channel to a dialplan target");
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