185 lines
6.7 KiB
C
185 lines
6.7 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2006, Digium, Inc.
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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 Channel info dialplan function
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*
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* \author Kevin P. Fleming <kpfleming@digium.com>
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*
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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 <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/types.h>
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#include "asterisk/module.h"
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#include "asterisk/channel.h"
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#include "asterisk/pbx.h"
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#include "asterisk/logger.h"
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#include "asterisk/utils.h"
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#include "asterisk/app.h"
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#include "asterisk/indications.h"
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#include "asterisk/stringfields.h"
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#define locked_copy_string(chan, dest, source, len) \
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do { \
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ast_channel_lock(chan); \
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ast_copy_string(dest, source, len); \
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ast_channel_unlock(chan); \
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} while (0)
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#define locked_string_field_set(chan, field, source) \
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do { \
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ast_channel_lock(chan); \
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ast_string_field_set(chan, field, source); \
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ast_channel_unlock(chan); \
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} while (0)
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char *transfercapability_table[0x20] = {
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"SPEECH", "UNK", "UNK", "UNK", "UNK", "UNK", "UNK", "UNK",
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"DIGITAL", "RESTRICTED_DIGITAL", "UNK", "UNK", "UNK", "UNK", "UNK", "UNK",
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"3K1AUDIO", "DIGITAL_W_TONES", "UNK", "UNK", "UNK", "UNK", "UNK", "UNK",
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"VIDEO", "UNK", "UNK", "UNK", "UNK", "UNK", "UNK", "UNK", };
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static int func_channel_read(struct ast_channel *chan, const char *function,
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char *data, char *buf, size_t len)
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{
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int ret = 0;
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if (!strcasecmp(data, "audionativeformat"))
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/* use the _multiple version when chan->nativeformats holds multiple formats */
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/* ast_getformatname_multiple(buf, len, chan->nativeformats & AST_FORMAT_AUDIO_MASK); */
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ast_copy_string(buf, ast_getformatname(chan->nativeformats & AST_FORMAT_AUDIO_MASK), len);
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else if (!strcasecmp(data, "videonativeformat"))
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/* use the _multiple version when chan->nativeformats holds multiple formats */
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/* ast_getformatname_multiple(buf, len, chan->nativeformats & AST_FORMAT_VIDEO_MASK); */
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ast_copy_string(buf, ast_getformatname(chan->nativeformats & AST_FORMAT_VIDEO_MASK), len);
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else if (!strcasecmp(data, "audioreadformat"))
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ast_copy_string(buf, ast_getformatname(chan->readformat), len);
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else if (!strcasecmp(data, "audiowriteformat"))
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ast_copy_string(buf, ast_getformatname(chan->writeformat), len);
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else if (!strcasecmp(data, "tonezone") && chan->zone)
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locked_copy_string(chan, buf, chan->zone->country, len);
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else if (!strcasecmp(data, "language"))
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locked_copy_string(chan, buf, chan->language, len);
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else if (!strcasecmp(data, "musicclass"))
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locked_copy_string(chan, buf, chan->musicclass, len);
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else if (!strcasecmp(data, "state"))
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locked_copy_string(chan, buf, ast_state2str(chan->_state), len);
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else if (!strcasecmp(data, "channeltype"))
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locked_copy_string(chan, buf, chan->tech->type, len);
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else if (!strcasecmp(data, "transfercapability"))
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locked_copy_string(chan, buf, transfercapability_table[chan->transfercapability & 0x1f], len);
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else if (!strcasecmp(data, "callgroup")) {
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char groupbuf[256];
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locked_copy_string(chan, buf, ast_print_group(groupbuf, sizeof(groupbuf), chan->callgroup), len);
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} else if (!chan->tech->func_channel_read
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|| chan->tech->func_channel_read(chan, function, data, buf, len)) {
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ast_log(LOG_WARNING, "Unknown or unavailable item requested: '%s'\n", data);
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ret = -1;
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}
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return ret;
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}
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static int func_channel_write(struct ast_channel *chan, const char *function,
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char *data, const char *value)
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{
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int ret = 0;
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signed char gainset;
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if (!strcasecmp(data, "language"))
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locked_string_field_set(chan, language, value);
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else if (!strcasecmp(data, "musicclass"))
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locked_string_field_set(chan, musicclass, value);
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else if (!strcasecmp(data, "tonezone")) {
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struct ind_tone_zone *new_zone;
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if (!(new_zone = ast_get_indication_zone(value))) {
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ast_log(LOG_ERROR, "Unknown country code '%s' for tonezone. Check indications.conf for available country codes.\n", value);
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ret = -1;
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} else
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chan->zone = new_zone;
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} else if (!strcasecmp(data, "callgroup"))
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chan->callgroup = ast_get_group(value);
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else if (!strcasecmp(data, "txgain")) {
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sscanf(value, "%hhd", &gainset);
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ast_channel_setoption(chan, AST_OPTION_TXGAIN, &gainset, sizeof(gainset), 0);
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} else if (!strcasecmp(data, "rxgain")) {
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sscanf(value, "%hhd", &gainset);
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ast_channel_setoption(chan, AST_OPTION_RXGAIN, &gainset, sizeof(gainset), 0);
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} else if (!strcasecmp(data, "transfercapability")) {
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unsigned short i;
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for (i = 0; i < 0x20; i++) {
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if (!strcasecmp(transfercapability_table[i], value) && strcmp(value, "UNK")) {
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chan->transfercapability = i;
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break;
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}
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}
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} else if (!chan->tech->func_channel_write
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|| chan->tech->func_channel_write(chan, function, data, value)) {
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ast_log(LOG_WARNING, "Unknown or unavailable item requested: '%s'\n",
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data);
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ret = -1;
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}
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return ret;
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}
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static struct ast_custom_function channel_function = {
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.name = "CHANNEL",
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.synopsis = "Gets/sets various pieces of information about the channel.",
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.syntax = "CHANNEL(item)",
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.desc = "Gets/set various pieces of information about the channel.\n"
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"Standard items (provided by all channel technologies) are:\n"
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"R/O audioreadformat format currently being read\n"
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"R/O audionativeformat format used natively for audio\n"
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"R/O audiowriteformat format currently being written\n"
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"R/W callgroup call groups for call pickup\n"
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"R/O channeltype technology used for channel\n"
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"R/W language language for sounds played\n"
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"R/W musicclass class (from musiconhold.conf) for hold music\n"
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"R/W rxgain set rxgain level on channel drivers that support it\n"
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"R/O state state for channel\n"
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"R/W tonezone zone for indications played\n"
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"R/W txgain set txgain level on channel drivers that support it\n"
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"R/O videonativeformat format used natively for video\n"
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"\n"
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"Additional items may be available from the channel driver providing\n"
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"the channel; see its documentation for details.\n"
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"\n"
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"Any item requested that is not available on the current channel will\n"
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"return an empty string.\n",
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.read = func_channel_read,
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.write = func_channel_write,
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};
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static int unload_module(void)
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{
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return ast_custom_function_unregister(&channel_function);
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}
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static int load_module(void)
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{
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return ast_custom_function_register(&channel_function);
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}
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AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Channel information dialplan function");
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