1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
/*
* 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 "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#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_channel_lock(chan); \
ast_copy_string(dest, source, len); \
ast_channel_unlock(chan); \
} while (0)
#define locked_string_field_set(chan, field, source) \
do { \
ast_channel_lock(chan); \
ast_string_field_set(chan, field, source); \
ast_channel_unlock(chan); \
} while (0)
char *transfercapability_table[0x20] = {
"SPEECH", "UNK", "UNK", "UNK", "UNK", "UNK", "UNK", "UNK",
"DIGITAL", "RESTRICTED_DIGITAL", "UNK", "UNK", "UNK", "UNK", "UNK", "UNK",
"3K1AUDIO", "DIGITAL_W_TONES", "UNK", "UNK", "UNK", "UNK", "UNK", "UNK",
"VIDEO", "UNK", "UNK", "UNK", "UNK", "UNK", "UNK", "UNK", };
static int func_channel_read(struct ast_channel *chan, const 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 (!strcasecmp(data, "state"))
locked_copy_string(chan, buf, ast_state2str(chan->_state), len);
else if (!strcasecmp(data, "channeltype"))
locked_copy_string(chan, buf, chan->tech->type, len);
else if (!strcasecmp(data, "transfercapability"))
locked_copy_string(chan, buf, transfercapability_table[chan->transfercapability & 0x1f], len);
else if (!strcasecmp(data, "callgroup")) {
char groupbuf[256];
locked_copy_string(chan, buf, ast_print_group(groupbuf, sizeof(groupbuf), chan->callgroup), 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, const char *function,
char *data, const char *value)
{
int ret = 0;
signed char gainset;
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 (!strcasecmp(data, "tonezone")) {
struct ind_tone_zone *new_zone;
if (!(new_zone = ast_get_indication_zone(value))) {
ast_log(LOG_ERROR, "Unknown country code '%s' for tonezone. Check indications.conf for available country codes.\n", value);
ret = -1;
} else
chan->zone = new_zone;
} else if (!strcasecmp(data, "callgroup"))
chan->callgroup = ast_get_group(value);
else if (!strcasecmp(data, "txgain")) {
sscanf(value, "%hhd", &gainset);
ast_channel_setoption(chan, AST_OPTION_TXGAIN, &gainset, sizeof(gainset), 0);
} else if (!strcasecmp(data, "rxgain")) {
sscanf(value, "%hhd", &gainset);
ast_channel_setoption(chan, AST_OPTION_RXGAIN, &gainset, sizeof(gainset), 0);
} else if (!strcasecmp(data, "transfercapability")) {
unsigned short i;
for (i = 0; i < 0x20; i++) {
if (!strcasecmp(transfercapability_table[i], value) && strcmp(value, "UNK")) {
chan->transfercapability = i;
break;
}
}
} 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 callgroup call groups for call pickup\n"
"R/O channeltype technology used for channel\n"
"R/W language language for sounds played\n"
"R/W musicclass class (from musiconhold.conf) for hold music\n"
"R/W rxgain set rxgain level on channel drivers that support it\n"
"R/O state state for channel\n"
"R/W tonezone zone for indications played\n"
"R/W txgain set txgain level on channel drivers that support it\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 int unload_module(void)
{
return ast_custom_function_unregister(&channel_function);
}
static int load_module(void)
{
return ast_custom_function_register(&channel_function);
}
AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Channel information dialplan function");
|
