path: root/contrib/package/asterisk-xip/patches/040-pickup2.patch

*** xx/apps/app_pickup2.c	1970-01-01 08:00:00.000000000 +0800
--- asterisk-1.4.22/apps/app_pickup2.c	2009-01-19 17:44:07.483909506 +0900
***************
*** 0 ****
--- 1,279 ----
+ /*
+  * Asterisk -- A telephony toolkit for Linux.
+  *
+  * Pickup, channel independent call pickup
+  *
+  * Copyright (C) 2005-2007, Thorsten Knabe <ast@thorsten-knabe.de>
+  * 
+  * Copyright (C) 2004, Junghanns.NET GmbH
+  *
+  * Klaus-Peter Junghanns <kpj@junghanns.net>
+  *
+  * Copyright (C) 2004, Florian Overkamp <florian@obsimref.com>
+  *
+  * This program is free software, distributed under the terms of
+  * the GNU General Public License
+  */
+ 
+ /*** MODULEINFO
+ 	<defaultenabled>yes</defaultenabled>
+  ***/
+ 
+ #include "asterisk.h"
+ 
+ ASTERISK_FILE_VERSION(__FILE__, "$Revision: 2 $")
+ 
+ #include <stdlib.h>
+ #include <unistd.h>
+ #include <string.h>
+ #include <stdio.h>
+ #include <signal.h>
+ #include <pthread.h>
+ #include "asterisk/lock.h"
+ #include "asterisk/file.h"
+ #include "asterisk/logger.h"
+ #include "asterisk/channel.h"
+ #include "asterisk/pbx.h"
+ #include "asterisk/module.h"
+ #include "asterisk/musiconhold.h"
+ #include "asterisk/features.h"
+ #include "asterisk/options.h"
+ 
+ static char *app = "PickUp2";
+ static char *synopsis = "PickUp ringing channel.";
+ static char *descrip = 
+ "  PickUp2(Technology/resource[&Technology2/resource2&...][|<option>]):\n"
+ "Matches the list of prefixes in the parameter list against channels in\n"
+ "state RINGING. If a match is found the channel is picked up and\n"
+ "PICKUP_CHANNEL is set to the picked up channel name. If no matching\n"
+ "channel is found PICKUP_CHANNEL is empty.\n"
+ "Possible options:\n"
+ "B: match on channel name of bridged channel.\n";
+ 
+ static char *app2 = "PickDown2";
+ static char *synopsis2 = "Hangup ringing channel.";
+ static char *descrip2 = 
+ "  PickDown2(Technology/resource[&Technology2/resource2&...][|<option>]):\n"
+ "Matches the list of prefixes in the parameter list against channels in\n"
+ "state RINGING. If a match is found the channel is hung up and\n"
+ "PICKDOWN_CHANNEL is set to the hung up channel name. If no matching\n"
+ "channel is found PICKDOWN_CHANNEL is empty.\n"
+ "Possible options:\n"
+ "B: match on channel name of bridged channel.\n";
+ 
+ static char *app3 = "Steal2";
+ static char *synopsis3 = "Steal a connected channel.";
+ 
+ static char *descrip3 = 
+ "  Steal2(Technology/resource[&Technology2/resource2&...][|<option>]):\n"
+ "Matches the list of prefixes in the parameter list against channels in\n"
+ "state UP. If a match is found the channel is stolen and\n"
+ "STEAL_CHANNEL is set to the stolen channel name. If no matching\n"
+ "channel is found STEAL_CHANNEL is empty.\n"
+ "Possible options:\n"
+ "B: match on channel name of bridged channel.\n";
+ 
+ /* Find channel matching given pattern and state, skipping our own channel.
+  * Returns locked channel, which has to be unlocked using ast_mutex_unlock().
+  * Returns NULL when no matching channel is found.
+  */
+ static struct ast_channel *find_matching_channel(struct ast_channel *chan,
+ 	void *pattern, int chanstate)
+ {
+ 	struct ast_channel *cur;
+ 	char *pat = "";
+ 	char *next_pat = NULL;
+ 	char *option = "";
+ 	struct ast_channel *bridged;
+ 
+ 	/* copy original pattern or use empty pattern if no pattern has been given*/
+ 	if (pattern) {
+ 		pat = alloca(strlen(pattern) + 1);
+ 		strcpy(pat, pattern);
+ 	}
+ 	for (option = pat; *option; option++) {
+ 		if (*option == '|') {
+ 			*option = '\0';
+ 			option++;
+ 			break;
+ 		}
+ 	}
+ 	ast_verbose(VERBOSE_PREFIX_4 
+ 		"find_matching_channel: pattern='%s' option='%s' state=%d\n",
+ 		(char *)pat, option, chanstate);
+ 
+ 	/* match on bridged channel name */
+ 	if (!strcmp("B", option)) {
+ 		/* Iterate over each part of the pattern */
+ 		while (pat) {
+ 			/* find pattern for next iteration, 
+ 			 * terminate current pattern */
+ 			for (next_pat = pat; 
+ 				*next_pat && *next_pat != '&'; next_pat++);
+ 			if (*next_pat == '&') {
+ 				*next_pat = 0;
+ 				next_pat++;
+ 			} else
+ 				next_pat = NULL;
+ 			/* Iterate over all channels */
+ 			cur = ast_channel_walk_locked(NULL);
+ 			while (cur) {
+ 				bridged = ast_bridged_channel(cur);
+ 				if (bridged) {
+ 					ast_verbose(VERBOSE_PREFIX_4 
+ 						"find_matching_channel: trying channel='%s' bridged='%s' "
+ 						"state=%d pattern='%s'\n",
+ 						cur->name, bridged->name, cur->_state, pat);
+ 					if ((cur != chan) && (bridged != chan) &&
+ 						(cur->_state == chanstate) &&
+ 						!strncmp(pat, bridged->name, strlen(pat))) {
+ 						ast_verbose(VERBOSE_PREFIX_4
+ 								"find_matching_channel: "
+ 								"found channel='%s' bridged='%s'\n",
+ 								cur->name, bridged->name);
+ 						return(cur);
+ 					}
+ 				}
+ 				ast_mutex_unlock(&cur->lock);
+ 				cur = ast_channel_walk_locked(cur);
+ 			}
+ 			pat = next_pat;
+ 		}
+ 	} else {
+ 		/* Iterate over each part of the pattern */
+ 		while (pat) {
+ 			/* find pattern for next iteration, 
+ 			 * terminate current pattern */
+ 			for (next_pat = pat; 
+ 				*next_pat && *next_pat != '&'; next_pat++);
+ 			if (*next_pat == '&') {
+ 				*next_pat = 0;
+ 				next_pat++;
+ 			} else
+ 				next_pat = NULL;
+ 			/* Iterate over all channels */
+ 			cur = ast_channel_walk_locked(NULL);
+ 			while (cur) {
+ 				ast_verbose(VERBOSE_PREFIX_4 
+ 					"find_matching_channel: trying channel='%s' "
+ 					"state=%d pattern='%s'\n",
+ 					cur->name, cur->_state, pat);
+ 				if ((cur != chan) && 
+ 					(cur->_state == chanstate) &&
+ 					!strncmp(pat, cur->name, strlen(pat))) {
+ 					ast_verbose(VERBOSE_PREFIX_4
+ 							"find_matching_channel: "
+ 							"found channel='%s'\n",
+ 							cur->name);
+ 					return(cur);
+ 				}
+ 				ast_mutex_unlock(&cur->lock);
+ 				cur = ast_channel_walk_locked(cur);
+ 			}
+ 			pat = next_pat;
+ 		}
+ 	}
+ 	return(NULL);
+ }
+ 
+ static int pickup_channel(struct ast_channel *chan, void *pattern)
+ {
+ 	int ret = 0;
+ 	struct ast_module_user *u;
+ 	struct ast_channel *cur;
+ 	u = ast_module_user_add(chan);
+ 	cur = find_matching_channel(chan, pattern, AST_STATE_RINGING);
+ 	if (cur) {
+ 		ast_verbose(VERBOSE_PREFIX_3 
+ 			"Channel %s picked up ringing channel %s\n",
+ 			chan->name, cur->name);
+ 		pbx_builtin_setvar_helper(chan, "PICKUP_CHANNEL", cur->name);
+ 		if (chan->_state != AST_STATE_UP) {
+ 			ast_answer(chan);
+ 		}
+ 		if (ast_channel_masquerade(cur, chan)) {
+ 			ast_log(LOG_ERROR, "unable to masquerade\n");
+ 			ret = -1;
+ 		}
+ 		ast_mutex_unlock(&cur->lock);
+ 		ast_mutex_unlock(&chan->lock);
+ 	} else {
+ 		pbx_builtin_setvar_helper(chan, "PICKUP_CHANNEL", "");
+ 	}
+ 	ast_module_user_remove(u);
+ 	return(ret);
+ }
+ 
+ static int pickdown_channel(struct ast_channel *chan, void *pattern)
+ {
+ 	int ret = 0;
+ 	struct ast_module_user *u;
+ 	struct ast_channel *cur;
+ 	u = ast_module_user_add(chan);
+ 	cur = find_matching_channel(chan, pattern, AST_STATE_RINGING);
+ 	if (cur) {
+                 ast_verbose(VERBOSE_PREFIX_3 
+ 			"Channel %s hung up ringing channel %s\n",
+ 			chan->name, cur->name);
+ 		pbx_builtin_setvar_helper(chan, "PICKDOWN_CHANNEL", cur->name);
+ 		ast_softhangup_nolock(cur, AST_SOFTHANGUP_DEV);
+ 		ast_mutex_unlock(&cur->lock);
+ 	} else {
+ 		pbx_builtin_setvar_helper(chan, "PICKDOWN_CHANNEL", "");
+ 	}
+ 	ast_module_user_remove(u);
+ 	return(ret);
+ }
+ 
+ static int steal_channel(struct ast_channel *chan, void *pattern)
+ {
+ 	int ret = 0;
+ 	struct ast_module_user *u;
+ 	struct ast_channel *cur;
+ 	u = ast_module_user_add(chan);
+ 	cur = find_matching_channel(chan, pattern, AST_STATE_UP);
+ 	if (cur) {
+ 		ast_verbose(VERBOSE_PREFIX_3 
+ 			"Channel %s stole channel %s\n",
+ 			chan->name, cur->name);
+ 		pbx_builtin_setvar_helper(chan, "STEAL_CHANNEL", cur->name);
+ 		if (chan->_state != AST_STATE_UP) {
+ 			ast_answer(chan);
+ 		}
+ 		if (cur->_bridge) {
+ 			if (!ast_mutex_lock(&cur->_bridge->lock)) {
+ 				ast_moh_stop(cur->_bridge);
+ 				ast_mutex_unlock(&cur->_bridge->lock);
+ 			}
+ 		}
+ 			
+ 		if (ast_channel_masquerade(cur, chan)) {
+ 			ast_log(LOG_ERROR, "unable to masquerade\n");
+ 			ret = -1;
+ 		}
+ 		ast_mutex_unlock(&cur->lock);
+ 		ast_mutex_unlock(&chan->lock);
+ 	} else {
+ 		pbx_builtin_setvar_helper(chan, "STEAL_CHANNEL", "");
+ 	}
+ 	ast_module_user_remove(u);
+ 	return(ret);
+ }
+ 
+ static int unload_module(void)
+ {
+   	ast_module_user_hangup_all();
+ 	ast_unregister_application(app3);
+ 	ast_unregister_application(app2);
+ 	return ast_unregister_application(app);
+ }
+ 
+ static int load_module(void)
+ {
+ 	ast_register_application(app3, steal_channel, synopsis3, descrip3);
+ 	ast_register_application(app2, pickdown_channel, synopsis2, descrip2);
+ 	return ast_register_application(app, pickup_channel, synopsis, descrip);
+ }
+ 
+ AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, 
+     "PickUp2, PickDown2, Steal2 Application");