e43bc6634d
As partly documented in loader.c and include/asterisk/module.h, modules are now expected to return all of their methods and flags into a structure 'mod_data', and are normally loaded with RTLD_NOW | RTLD_LOCAL, so symbols are resolved immediately and conflicts should be less likely. Only in a small number of cases (res_*, typically) modules are loaded RTLD_GLOBAL, so they can export symbols. The core of the change is only the two files loader.c and include/asterisk/module.h, all the rest is simply adaptation of the existing modules to the new API, a rather mechanical (but believe me, time and finger-consuming!) process whose detail you can figure out by svn diff'ing any single module. Expect some minor compilation issue after this change, please report it on mantis http://bugs.digium.com/view.php?id=6968 so we collect all the feedback in one place. I am just sorry that this change missed SVN version number 20000! git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@20003 65c4cc65-6c06-0410-ace0-fbb531ad65f3
172 lines
4 KiB
C
172 lines
4 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2005, Digium, Inc.
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*
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* Mark Spencer <markster@digium.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 Transfer a caller
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*
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* \author Mark Spencer <markster@digium.com>
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*
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* Requires transfer support from channel driver
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*
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* \ingroup applications
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include "asterisk/lock.h"
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#include "asterisk/file.h"
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#include "asterisk/logger.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/options.h"
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#include "asterisk/app.h"
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LOCAL_USER_DECL;
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static const char *app = "Transfer";
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static const char *synopsis = "Transfer caller to remote extension";
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static const char *descrip =
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" Transfer([Tech/]dest[|options]): Requests the remote caller be transferred\n"
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"to a given destination. If TECH (SIP, IAX2, LOCAL etc) is used, only\n"
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"an incoming call with the same channel technology will be transfered.\n"
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"Note that for SIP, if you transfer before call is setup, a 302 redirect\n"
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"SIP message will be returned to the caller.\n"
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"\nThe result of the application will be reported in the TRANSFERSTATUS\n"
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"channel variable:\n"
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" SUCCESS Transfer succeeded\n"
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" FAILURE Transfer failed\n"
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" UNSUPPORTED Transfer unsupported by channel driver\n"
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"The option string many contain the following character:\n"
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"'j' -- jump to n+101 priority if the channel transfer attempt\n"
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" fails\n";
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static int transfer_exec(struct ast_channel *chan, void *data)
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{
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int res;
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int len;
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struct localuser *u;
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char *slash;
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char *tech = NULL;
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char *dest = NULL;
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char *status;
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char *parse;
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int priority_jump = 0;
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AST_DECLARE_APP_ARGS(args,
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AST_APP_ARG(dest);
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AST_APP_ARG(options);
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);
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LOCAL_USER_ADD(u);
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if (ast_strlen_zero((char *)data)) {
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ast_log(LOG_WARNING, "Transfer requires an argument ([Tech/]destination[|options])\n");
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LOCAL_USER_REMOVE(u);
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pbx_builtin_setvar_helper(chan, "TRANSFERSTATUS", "FAILURE");
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return 0;
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} else {
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if (!(parse = ast_strdupa(data))) {
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LOCAL_USER_REMOVE(u);
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return -1;
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}
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}
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AST_STANDARD_APP_ARGS(args, parse);
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if (args.options) {
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if (strchr(args.options, 'j'))
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priority_jump = 1;
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}
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dest = args.dest;
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if ((slash = strchr(dest, '/')) && (len = (slash - dest))) {
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tech = dest;
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dest = slash + 1;
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/* Allow execution only if the Tech/destination agrees with the type of the channel */
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if (strncasecmp(chan->tech->type, tech, len)) {
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pbx_builtin_setvar_helper(chan, "TRANSFERSTATUS", "FAILURE");
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LOCAL_USER_REMOVE(u);
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return 0;
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}
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}
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/* Check if the channel supports transfer before we try it */
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if (!chan->tech->transfer) {
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pbx_builtin_setvar_helper(chan, "TRANSFERSTATUS", "UNSUPPORTED");
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LOCAL_USER_REMOVE(u);
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return 0;
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}
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res = ast_transfer(chan, dest);
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if (res < 0) {
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status = "FAILURE";
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if (priority_jump || ast_opt_priority_jumping)
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ast_goto_if_exists(chan, chan->context, chan->exten, chan->priority + 101);
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res = 0;
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} else {
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status = "SUCCESS";
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res = 0;
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}
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pbx_builtin_setvar_helper(chan, "TRANSFERSTATUS", status);
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LOCAL_USER_REMOVE(u);
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return res;
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}
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static int unload_module(void *mod)
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{
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int res;
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res = ast_unregister_application(app);
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STANDARD_HANGUP_LOCALUSERS;
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return res;
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}
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static int load_module(void *mod)
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{
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return ast_register_application(app, transfer_exec, synopsis, descrip);
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}
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static const char *description(void)
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{
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return "Transfer";
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}
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static const char *key(void)
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{
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return ASTERISK_GPL_KEY;
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}
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STD_MOD1;
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