(Closes issue #11161) git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@94773 65c4cc65-6c06-0410-ace0-fbb531ad65f3
173 lines
4.5 KiB
C
173 lines
4.5 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Gary Cook
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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 Pickup a ringing channel
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*
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* \author Gary Cook
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*
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* \ingroup applications
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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 <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/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/lock.h"
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#include "asterisk/app.h"
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#include "asterisk/options.h"
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static const char *app = "PickupChan";
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static const char *synopsis = "Pickup a ringing channel";
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static const char *descrip =
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" PickupChan(channel[&channel...]): This application can pickup any ringing channel\n";
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/* Helper function that determines whether a channel is capable of being picked up */
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static int can_pickup(struct ast_channel *chan)
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{
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ast_debug(3, "Checking Pickup '%s' state '%s ( %d )'\n", chan->name, ast_state2str(chan->_state), chan->_state);
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if (!chan->pbx && (chan->_state == AST_STATE_RINGING || chan->_state == AST_STATE_RING)) {
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return 1;
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} else {
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return 0;
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}
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}
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/* Helper Function to walk through ALL channels checking NAME and STATE */
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static struct ast_channel *my_ast_get_channel_by_name_locked(char *channame)
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{
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struct ast_channel *chan;
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char *chkchan = alloca(strlen(channame) + 2);
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/* need to append a '-' for the comparison so we check full channel name,
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* i.e SIP/hgc- , use a temporary variable so original stays the same for
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* debugging.
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*/
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strcpy(chkchan, channame);
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strcat(chkchan, "-");
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for (chan = ast_walk_channel_by_name_prefix_locked(NULL, channame, strlen(channame));
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chan;
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chan = ast_walk_channel_by_name_prefix_locked(chan, channame, strlen(channame))) {
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if (!strncasecmp(chan->name, chkchan, strlen(chkchan)) && can_pickup(chan))
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return chan;
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ast_channel_unlock(chan);
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}
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return NULL;
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}
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/* Perform actual pickup between two channels */
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static int pickup_do(struct ast_channel *chan, struct ast_channel *target)
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{
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int res = 0;
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ast_debug(3, "Call pickup on '%s' by '%s'\n", target->name, chan->name);
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if ((res = ast_answer(chan))) {
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ast_log(LOG_WARNING, "Unable to answer '%s'\n", chan->name);
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return -1;
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}
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if ((res = ast_queue_control(chan, AST_CONTROL_ANSWER))) {
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ast_log(LOG_WARNING, "Unable to queue answer on '%s'\n", chan->name);
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return -1;
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}
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if ((res = ast_channel_masquerade(target, chan))) {
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ast_log(LOG_WARNING, "Unable to masquerade '%s' into '%s'\n", chan->name, target->name);
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return -1;
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}
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return res;
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}
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/* Attempt to pick up specified channel named , does not use context */
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static int pickup_by_channel(struct ast_channel *chan, char *pickup)
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{
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int res = 0;
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struct ast_channel *target;
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if (!(target = my_ast_get_channel_by_name_locked(pickup)))
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return -1;
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/* Just check that we are not picking up the SAME as target */
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if (chan->name != target->name && chan != target) {
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res = pickup_do(chan, target);
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ast_channel_unlock(target);
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}
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return res;
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}
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/* Main application entry point */
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static int pickupchan_exec(struct ast_channel *chan, void *data)
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{
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int res = 0;
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struct ast_module_user *u = NULL;
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char *tmp = ast_strdupa(data);
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char *pickup = NULL, *context = NULL;
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if (ast_strlen_zero(data)) {
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ast_log(LOG_WARNING, "Pickup requires an argument (channel)!\n");
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return -1;
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}
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u = ast_module_user_add(chan);
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/* Parse channel (and ignore context if there) */
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while (!ast_strlen_zero(tmp) && (pickup = strsep(&tmp, "&"))) {
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if ((context = strchr(pickup , '@'))) {
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*context++ = '\0';
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}
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if (!strncasecmp(chan->name, pickup , strlen(pickup))) {
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ast_log(LOG_NOTICE, "Cannot pickup your own channel %s.\n", pickup);
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} else {
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if (!pickup_by_channel(chan, pickup)) {
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break;
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}
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ast_log(LOG_NOTICE, "No target channel found for %s.\n", pickup);
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}
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}
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ast_module_user_remove(u);
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return res;
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}
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static int unload_module(void)
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{
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return ast_unregister_application(app);
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}
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static int load_module(void)
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{
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return ast_register_application(app, pickupchan_exec, synopsis, descrip);
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}
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AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Channel Pickup Application");
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