diff options
Diffstat (limited to '1.4.23-rc4/apps/app_chanisavail.c')
| -rw-r--r-- | 1.4.23-rc4/apps/app_chanisavail.c | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/1.4.23-rc4/apps/app_chanisavail.c b/1.4.23-rc4/apps/app_chanisavail.c new file mode 100644 index 000000000..c6931d8db --- /dev/null +++ b/1.4.23-rc4/apps/app_chanisavail.c @@ -0,0 +1,173 @@ +/* +* Asterisk -- An open source telephony toolkit. +* +* Copyright (C) 1999 - 2005, Digium, Inc. +* +* Mark Spencer <markster@digium.com> +* James Golovich <james@gnuinter.net> +* +* See http://www.asterisk.org for more information about +* the Asterisk project. Please do not directly contact +* any of the maintainers of this project for assistance; +* the project provides a web site, mailing lists and IRC +* channels for your use. +* +* This program is free software, distributed under the terms of +* the GNU General Public License Version 2. See the LICENSE file +* at the top of the source tree. +*/ + +/*! \file + * + * \brief Check if Channel is Available + * + * \author Mark Spencer <markster@digium.com> + * \author James Golovich <james@gnuinter.net> + + * \ingroup applications + */ + +#include "asterisk.h" + +ASTERISK_FILE_VERSION(__FILE__, "$Revision$") + +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> +#include <errno.h> +#include <sys/ioctl.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/app.h" +#include "asterisk/devicestate.h" +#include "asterisk/options.h" + +static char *app = "ChanIsAvail"; + +static char *synopsis = "Check channel availability"; + +static char *descrip = +" ChanIsAvail(Technology/resource[&Technology2/resource2...][|options]): \n" +"This application will check to see if any of the specified channels are\n" +"available. The following variables will be set by this application:\n" +" ${AVAILCHAN} - the name of the available channel, if one exists\n" +" ${AVAILORIGCHAN} - the canonical channel name that was used to create the channel\n" +" ${AVAILSTATUS} - the status code for the available channel\n" +" Options:\n" +" s - Consider the channel unavailable if the channel is in use at all\n" +" j - Support jumping to priority n+101 if no channel is available\n"; + + +static int chanavail_exec(struct ast_channel *chan, void *data) +{ + int res=-1, inuse=-1, option_state=0, priority_jump=0; + int status; + struct ast_module_user *u; + char *info, tmp[512], trychan[512], *peers, *tech, *number, *rest, *cur; + struct ast_channel *tempchan; + AST_DECLARE_APP_ARGS(args, + AST_APP_ARG(reqchans); + AST_APP_ARG(options); + ); + + if (ast_strlen_zero(data)) { + ast_log(LOG_WARNING, "ChanIsAvail requires an argument (Zap/1&Zap/2)\n"); + return -1; + } + + u = ast_module_user_add(chan); + + info = ast_strdupa(data); + + AST_STANDARD_APP_ARGS(args, info); + + if (args.options) { + if (strchr(args.options, 's')) + option_state = 1; + if (strchr(args.options, 'j')) + priority_jump = 1; + } + peers = args.reqchans; + if (peers) { + cur = peers; + do { + /* remember where to start next time */ + rest = strchr(cur, '&'); + if (rest) { + *rest = 0; + rest++; + } + tech = cur; + number = strchr(tech, '/'); + if (!number) { + ast_log(LOG_WARNING, "ChanIsAvail argument takes format ([technology]/[device])\n"); + ast_module_user_remove(u); + return -1; + } + *number = '\0'; + number++; + + if (option_state) { + /* If the pbx says in use then don't bother trying further. + This is to permit testing if someone's on a call, even if the + channel can permit more calls (ie callwaiting, sip calls, etc). */ + + snprintf(trychan, sizeof(trychan), "%s/%s",cur,number); + status = inuse = ast_device_state(trychan); + } + if ((inuse <= 1) && (tempchan = ast_request(tech, chan->nativeformats, number, &status))) { + pbx_builtin_setvar_helper(chan, "AVAILCHAN", tempchan->name); + /* Store the originally used channel too */ + snprintf(tmp, sizeof(tmp), "%s/%s", tech, number); + pbx_builtin_setvar_helper(chan, "AVAILORIGCHAN", tmp); + snprintf(tmp, sizeof(tmp), "%d", status); + pbx_builtin_setvar_helper(chan, "AVAILSTATUS", tmp); + ast_hangup(tempchan); + tempchan = NULL; + res = 1; + break; + } else { + snprintf(tmp, sizeof(tmp), "%d", status); + pbx_builtin_setvar_helper(chan, "AVAILSTATUS", tmp); + } + cur = rest; + } while (cur); + } + if (res < 1) { + pbx_builtin_setvar_helper(chan, "AVAILCHAN", ""); + pbx_builtin_setvar_helper(chan, "AVAILORIGCHAN", ""); + if (priority_jump || ast_opt_priority_jumping) { + if (ast_goto_if_exists(chan, chan->context, chan->exten, chan->priority + 101)) { + ast_module_user_remove(u); + return -1; + } + } + } + + ast_module_user_remove(u); + return 0; +} + +static int unload_module(void) +{ + int res = 0; + + res = ast_unregister_application(app); + + ast_module_user_hangup_all(); + + return res; +} + +static int load_module(void) +{ + return ast_register_application(app, chanavail_exec, synopsis, descrip); +} + +AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Check channel availability"); |