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Diffstat (limited to 'funcs/func_channel.c')
-rw-r--r-- | funcs/func_channel.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/funcs/func_channel.c b/funcs/func_channel.c new file mode 100644 index 000000000..82fbd639b --- /dev/null +++ b/funcs/func_channel.c @@ -0,0 +1,152 @@ +/* + * 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; +} |