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00027 #include "asterisk.h"
00028
00029 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 286115 $")
00030
00031 #include <regex.h>
00032
00033 #include "asterisk/module.h"
00034 #include "asterisk/channel.h"
00035 #include "asterisk/pbx.h"
00036 #include "asterisk/utils.h"
00037 #include "asterisk/app.h"
00038 #include "asterisk/indications.h"
00039 #include "asterisk/stringfields.h"
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00210
00211
00212 #define locked_copy_string(chan, dest, source, len) \
00213 do { \
00214 ast_channel_lock(chan); \
00215 ast_copy_string(dest, source, len); \
00216 ast_channel_unlock(chan); \
00217 } while (0)
00218 #define locked_string_field_set(chan, field, source) \
00219 do { \
00220 ast_channel_lock(chan); \
00221 ast_string_field_set(chan, field, source); \
00222 ast_channel_unlock(chan); \
00223 } while (0)
00224
00225 char *transfercapability_table[0x20] = {
00226 "SPEECH", "UNK", "UNK", "UNK", "UNK", "UNK", "UNK", "UNK",
00227 "DIGITAL", "RESTRICTED_DIGITAL", "UNK", "UNK", "UNK", "UNK", "UNK", "UNK",
00228 "3K1AUDIO", "DIGITAL_W_TONES", "UNK", "UNK", "UNK", "UNK", "UNK", "UNK",
00229 "VIDEO", "UNK", "UNK", "UNK", "UNK", "UNK", "UNK", "UNK", };
00230
00231 static int func_channel_read(struct ast_channel *chan, const char *function,
00232 char *data, char *buf, size_t len)
00233 {
00234 int ret = 0;
00235
00236 if (!strcasecmp(data, "audionativeformat"))
00237
00238
00239 ast_copy_string(buf, ast_getformatname(chan->nativeformats & AST_FORMAT_AUDIO_MASK), len);
00240 else if (!strcasecmp(data, "videonativeformat"))
00241
00242
00243 ast_copy_string(buf, ast_getformatname(chan->nativeformats & AST_FORMAT_VIDEO_MASK), len);
00244 else if (!strcasecmp(data, "audioreadformat"))
00245 ast_copy_string(buf, ast_getformatname(chan->readformat), len);
00246 else if (!strcasecmp(data, "audiowriteformat"))
00247 ast_copy_string(buf, ast_getformatname(chan->writeformat), len);
00248 #ifdef CHANNEL_TRACE
00249 else if (!strcasecmp(data, "trace")) {
00250 ast_channel_lock(chan);
00251 ast_copy_string(buf, ast_channel_trace_is_enabled(chan) ? "1" : "0", len);
00252 ast_channel_unlock(chan);
00253 }
00254 #endif
00255 else if (!strcasecmp(data, "tonezone") && chan->zone)
00256 locked_copy_string(chan, buf, chan->zone->country, len);
00257 else if (!strcasecmp(data, "language"))
00258 locked_copy_string(chan, buf, chan->language, len);
00259 else if (!strcasecmp(data, "musicclass"))
00260 locked_copy_string(chan, buf, chan->musicclass, len);
00261 else if (!strcasecmp(data, "parkinglot"))
00262 locked_copy_string(chan, buf, chan->parkinglot, len);
00263 else if (!strcasecmp(data, "state"))
00264 locked_copy_string(chan, buf, ast_state2str(chan->_state), len);
00265 else if (!strcasecmp(data, "channeltype"))
00266 locked_copy_string(chan, buf, chan->tech->type, len);
00267 else if (!strcasecmp(data, "transfercapability"))
00268 locked_copy_string(chan, buf, transfercapability_table[chan->transfercapability & 0x1f], len);
00269 else if (!strcasecmp(data, "callgroup")) {
00270 char groupbuf[256];
00271 locked_copy_string(chan, buf, ast_print_group(groupbuf, sizeof(groupbuf), chan->callgroup), len);
00272 } else if (!chan->tech->func_channel_read
00273 || chan->tech->func_channel_read(chan, function, data, buf, len)) {
00274 ast_log(LOG_WARNING, "Unknown or unavailable item requested: '%s'\n", data);
00275 ret = -1;
00276 }
00277
00278 return ret;
00279 }
00280
00281 static int func_channel_write_real(struct ast_channel *chan, const char *function,
00282 char *data, const char *value)
00283 {
00284 int ret = 0;
00285 signed char gainset;
00286
00287 if (!strcasecmp(data, "language"))
00288 locked_string_field_set(chan, language, value);
00289 else if (!strcasecmp(data, "parkinglot"))
00290 locked_string_field_set(chan, parkinglot, value);
00291 else if (!strcasecmp(data, "musicclass"))
00292 locked_string_field_set(chan, musicclass, value);
00293 #ifdef CHANNEL_TRACE
00294 else if (!strcasecmp(data, "trace")) {
00295 ast_channel_lock(chan);
00296 if (ast_true(value))
00297 ret = ast_channel_trace_enable(chan);
00298 else if (ast_false(value))
00299 ret = ast_channel_trace_disable(chan);
00300 else {
00301 ret = -1;
00302 ast_log(LOG_WARNING, "Invalid value for CHANNEL(trace).");
00303 }
00304 ast_channel_unlock(chan);
00305 }
00306 #endif
00307 else if (!strcasecmp(data, "tonezone")) {
00308 struct ast_tone_zone *new_zone;
00309 if (!(new_zone = ast_get_indication_zone(value))) {
00310 ast_log(LOG_ERROR, "Unknown country code '%s' for tonezone. Check indications.conf for available country codes.\n", value);
00311 ret = -1;
00312 } else {
00313 ast_channel_lock(chan);
00314 if (chan->zone) {
00315 chan->zone = ast_tone_zone_unref(chan->zone);
00316 }
00317 chan->zone = ast_tone_zone_ref(new_zone);
00318 ast_channel_unlock(chan);
00319 new_zone = ast_tone_zone_unref(new_zone);
00320 }
00321 } else if (!strcasecmp(data, "callgroup"))
00322 chan->callgroup = ast_get_group(value);
00323 else if (!strcasecmp(data, "txgain")) {
00324 sscanf(value, "%4hhd", &gainset);
00325 ast_channel_setoption(chan, AST_OPTION_TXGAIN, &gainset, sizeof(gainset), 0);
00326 } else if (!strcasecmp(data, "rxgain")) {
00327 sscanf(value, "%4hhd", &gainset);
00328 ast_channel_setoption(chan, AST_OPTION_RXGAIN, &gainset, sizeof(gainset), 0);
00329 } else if (!strcasecmp(data, "transfercapability")) {
00330 unsigned short i;
00331 for (i = 0; i < 0x20; i++) {
00332 if (!strcasecmp(transfercapability_table[i], value) && strcmp(value, "UNK")) {
00333 chan->transfercapability = i;
00334 break;
00335 }
00336 }
00337 } else if (!chan->tech->func_channel_write
00338 || chan->tech->func_channel_write(chan, function, data, value)) {
00339 ast_log(LOG_WARNING, "Unknown or unavailable item requested: '%s'\n",
00340 data);
00341 ret = -1;
00342 }
00343
00344 return ret;
00345 }
00346
00347 static int func_channel_write(struct ast_channel *chan, const char *function, char *data, const char *value)
00348 {
00349 int res;
00350 ast_chan_write_info_t write_info = {
00351 .version = AST_CHAN_WRITE_INFO_T_VERSION,
00352 .write_fn = func_channel_write_real,
00353 .chan = chan,
00354 .function = function,
00355 .data = data,
00356 .value = value,
00357 };
00358
00359 res = func_channel_write_real(chan, function, data, value);
00360 ast_channel_setoption(chan, AST_OPTION_CHANNEL_WRITE, &write_info, sizeof(write_info), 0);
00361
00362 return res;
00363 }
00364
00365 static struct ast_custom_function channel_function = {
00366 .name = "CHANNEL",
00367 .read = func_channel_read,
00368 .write = func_channel_write,
00369 };
00370
00371 static int func_channels_read(struct ast_channel *chan, const char *function, char *data, char *buf, size_t maxlen)
00372 {
00373 struct ast_channel *c = NULL;
00374 regex_t re;
00375 int res;
00376 size_t buflen = 0;
00377
00378 buf[0] = '\0';
00379
00380 if (!ast_strlen_zero(data)) {
00381 if ((res = regcomp(&re, data, REG_EXTENDED | REG_ICASE | REG_NOSUB))) {
00382 regerror(res, &re, buf, maxlen);
00383 ast_log(LOG_WARNING, "Error compiling regular expression for %s(%s): %s\n", function, data, buf);
00384 return -1;
00385 }
00386 }
00387
00388 for (c = ast_channel_walk_locked(NULL); c; ast_channel_unlock(c), c = ast_channel_walk_locked(c)) {
00389 if (ast_strlen_zero(data) || regexec(&re, c->name, 0, NULL, 0) == 0) {
00390 size_t namelen = strlen(c->name);
00391 if (buflen + namelen + (ast_strlen_zero(buf) ? 0 : 1) + 1 < maxlen) {
00392 if (!ast_strlen_zero(buf)) {
00393 strcat(buf, " ");
00394 buflen++;
00395 }
00396 strcat(buf, c->name);
00397 buflen += namelen;
00398 } else {
00399 ast_log(LOG_WARNING, "Number of channels exceeds the available buffer space. Output will be truncated!\n");
00400 }
00401 }
00402 }
00403
00404 if (!ast_strlen_zero(data)) {
00405 regfree(&re);
00406 }
00407
00408 return 0;
00409 }
00410
00411 static struct ast_custom_function channels_function = {
00412 .name = "CHANNELS",
00413 .read = func_channels_read,
00414 };
00415
00416 static int unload_module(void)
00417 {
00418 int res = 0;
00419
00420 res |= ast_custom_function_unregister(&channel_function);
00421 res |= ast_custom_function_unregister(&channels_function);
00422
00423 return res;
00424 }
00425
00426 static int load_module(void)
00427 {
00428 int res = 0;
00429
00430 res |= ast_custom_function_register(&channel_function);
00431 res |= ast_custom_function_register(&channels_function);
00432
00433 return res;
00434 }
00435
00436 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Channel information dialplan functions");