![qwell](/assets/img/avatar_default.png)
Initially, this was to be a new feature, with a patch from Switchvox, but after discussions, it was noted that this feature already existed in trunk. The resulting discussions ended in a comment that was along the lines of "the patch provided here is a lot smaller than what is already in trunk, because it doesn't create a new application and duplicate existing code" It was decided that these two applications could be easily merged to reduce code duplication. SO, that's what this does. git-svn-id: http://svn.digium.com/svn/asterisk/trunk@114660 f38db490-d61c-443f-a65b-d21fe96a405b
258 lines
7 KiB
C
258 lines
7 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2005, Joshua Colp
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*
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* Joshua Colp <jcolp@digium.com>
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*
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* Portions merged from app_pickupchan, which was
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* Copyright (C) 2008, 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 Directed Call Pickup Support
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*
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* \author Joshua Colp <jcolp@digium.com>
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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 "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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#define PICKUPMARK "PICKUPMARK"
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static const char *app = "Pickup";
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static const char *synopsis = "Directed Call Pickup";
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static const char *descrip =
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" Pickup([extension[@context][&extension2@[context]...]]): This application can\n"
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"pickup any ringing channel that is calling the specified extension. If no\n"
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"context is specified, the current context will be used. If you use the special\n"
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"string \"PICKUPMARK\" for the context parameter, for example 10@PICKUPMARK,\n"
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"this application tries to find a channel which has defined a ${PICKUPMARK}\n"
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"channel variable with the same value as \"extension\" (in this example, \"10\").\n"
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"When no parameter is specified, the application will pickup a channel matching\n"
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"the pickup group of the active channel.";
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static const char *app2 = "PickupChan";
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static const char *synopsis2 = "Pickup a ringing channel";
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static const char *descrip2 =
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" PickupChan(channel[&channel...]): This application can pickup any ringing channel\n";
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/*! \todo This application should return a result code, like PICKUPRESULT */
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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(1, "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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/* 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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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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/*! \brief 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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/*! \brief 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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/* Attempt to pick up specified extension with context */
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static int pickup_by_exten(struct ast_channel *chan, const char *exten, const char *context)
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{
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int res = -1;
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struct ast_channel *target = NULL;
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while ((target = ast_channel_walk_locked(target))) {
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if ((!strcasecmp(target->macroexten, exten) || !strcasecmp(target->exten, exten)) &&
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!strcasecmp(target->dialcontext, context) &&
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can_pickup(target)) {
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res = pickup_do(chan, target);
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ast_channel_unlock(target);
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break;
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}
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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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/* Attempt to pick up specified mark */
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static int pickup_by_mark(struct ast_channel *chan, const char *mark)
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{
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int res = -1;
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const char *tmp = NULL;
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struct ast_channel *target = NULL;
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while ((target = ast_channel_walk_locked(target))) {
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if ((tmp = pbx_builtin_getvar_helper(target, PICKUPMARK)) &&
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!strcasecmp(tmp, mark) &&
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can_pickup(target)) {
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res = pickup_do(chan, target);
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ast_channel_unlock(target);
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break;
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}
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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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/* application entry point for Pickup() */
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static int pickup_exec(struct ast_channel *chan, void *data)
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{
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int res = 0;
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char *tmp = ast_strdupa(data);
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char *exten = NULL, *context = NULL;
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if (ast_strlen_zero(data)) {
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res = ast_pickup_call(chan);
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return res;
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}
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/* Parse extension (and context if there) */
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while (!ast_strlen_zero(tmp) && (exten = strsep(&tmp, "&"))) {
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if ((context = strchr(exten, '@')))
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*context++ = '\0';
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if (!ast_strlen_zero(context) && !strcasecmp(context, PICKUPMARK)) {
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if (!pickup_by_mark(chan, exten))
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break;
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} else {
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if (!pickup_by_exten(chan, exten, !ast_strlen_zero(context) ? context : chan->context))
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break;
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}
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ast_log(LOG_NOTICE, "No target channel found for %s.\n", exten);
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}
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return res;
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}
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/* application entry point for PickupChan() */
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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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char *tmp = ast_strdupa(data);
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char *pickup = NULL;
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if (ast_strlen_zero(data)) {
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ast_log(LOG_WARNING, "PickupChan requires an argument (channel)!\n");
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return -1;
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}
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/* Parse channel */
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while (!ast_strlen_zero(tmp) && (pickup = strsep(&tmp, "&"))) {
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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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return res;
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}
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static int unload_module(void)
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{
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int res;
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res = ast_unregister_application(app);
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res |= ast_unregister_application(app2);
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return res;
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}
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static int load_module(void)
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{
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int res;
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res = ast_register_application(app, pickup_exec, synopsis, descrip);
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res |= ast_register_application(app2, pickupchan_exec, synopsis2, descrip2);
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return res;
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}
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AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Directed Call Pickup Application");
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