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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2006, Digium, Inc.
*
* 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 Channel info dialplan function
*
* \author Kevin P. Fleming <kpfleming@digium.com>
*
*/
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision: $")
#include "asterisk/module.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/logger.h"
#include "asterisk/utils.h"
#include "asterisk/app.h"
#include "asterisk/indications.h"
#include "asterisk/stringfields.h"
#define locked_copy_string(chan, dest, source, len) \
do { \
ast_mutex_lock(&chan->lock); \
ast_copy_string(dest, source, len); \
ast_mutex_unlock(&chan->lock); \
} while (0)
#define locked_string_field_set(chan, field, source) \
do { \
ast_mutex_lock(&chan->lock); \
ast_string_field_set(chan, field, source); \
ast_mutex_unlock(&chan->lock); \
} while (0)
static int func_channel_read(struct ast_channel *chan, char *function,
char *data, char *buf, size_t len)
{
int ret = 0;
if (!strcasecmp(data, "audionativeformat"))
/* use the _multiple version when chan->nativeformats holds multiple formats */
/* ast_getformatname_multiple(buf, len, chan->nativeformats & AST_FORMAT_AUDIO_MASK); */
ast_copy_string(buf, ast_getformatname(chan->nativeformats & AST_FORMAT_AUDIO_MASK), len);
else if (!strcasecmp(data, "videonativeformat"))
/* use the _multiple version when chan->nativeformats holds multiple formats */
/* ast_getformatname_multiple(buf, len, chan->nativeformats & AST_FORMAT_VIDEO_MASK); */
ast_copy_string(buf, ast_getformatname(chan->nativeformats & AST_FORMAT_VIDEO_MASK), len);
else if (!strcasecmp(data, "audioreadformat"))
ast_copy_string(buf, ast_getformatname(chan->readformat), len);
else if (!strcasecmp(data, "audiowriteformat"))
ast_copy_string(buf, ast_getformatname(chan->writeformat), len);
else if (!strcasecmp(data, "tonezone") && chan->zone)
locked_copy_string(chan, buf, chan->zone->country, len);
else if (!strcasecmp(data, "language"))
locked_copy_string(chan, buf, chan->language, len);
else if (!strcasecmp(data, "musicclass"))
locked_copy_string(chan, buf, chan->musicclass, len);
else if (!chan->tech->func_channel_read
|| chan->tech->func_channel_read(chan, function, data, buf, len)) {
ast_log(LOG_WARNING, "Unknown or unavailable item requested: '%s'\n", data);
ret = -1;
}
return ret;
}
static int func_channel_write(struct ast_channel *chan, char *function,
char *data, const char *value)
{
int ret = 0;
if (!strcasecmp(data, "language"))
locked_string_field_set(chan, language, value);
else if (!strcasecmp(data, "musicclass"))
locked_string_field_set(chan, musicclass, value);
else if (!chan->tech->func_channel_write
|| chan->tech->func_channel_write(chan, function, data, value)) {
ast_log(LOG_WARNING, "Unknown or unavailable item requested: '%s'\n",
data);
ret = -1;
}
return ret;
}
static struct ast_custom_function channel_function = {
.name = "CHANNEL",
.synopsis = "Gets/sets various pieces of information about the channel.",
.syntax = "CHANNEL(item)",
.desc = "Gets/set various pieces of information about the channel.\n"
"Standard items (provided by all channel technologies) are:\n"
"R/O audioreadformat format currently being read\n"
"R/O audionativeformat format used natively for audio\n"
"R/O audiowriteformat format currently being written\n"
"R/W language language for sounds played\n"
"R/W musicclass class (from musiconhold.conf) for hold music\n"
"R/O tonezone zone for indications played\n"
"R/O videonativeformat format used natively for video\n"
"\n"
"Additional items may be available from the channel driver providing\n"
"the channel; see its documentation for details.\n"
"\n"
"Any item requested that is not available on the current channel will\n"
"return an empty string.\n",
.read = func_channel_read,
.write = func_channel_write,
};
static char *tdesc = "Channel information dialplan function";
int unload_module(void)
{
return ast_custom_function_unregister(&channel_function);
}
int load_module(void)
{
return ast_custom_function_register(&channel_function);
}
char *description(void)
{
return tdesc;
}
int usecount(void)
{
return 0;
}
char *key()
{
return ASTERISK_GPL_KEY;
}
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