/*!
* \brief Change state of monitored channel
* \param chan
* \param state monitor state
* \retval 0 on success.
* \retval -1 on failure.
*/
static int ast_monitor_set_state(struct ast_channel *chan, int state)
{
LOCK_IF_NEEDED(chan, 1);
if (!ast_channel_monitor(chan)) {
UNLOCK_IF_NEEDED(chan, 1);
return -1;
}
ast_channel_monitor(chan)->state = state;
UNLOCK_IF_NEEDED(chan, 1);
return 0;
}
/* Change monitoring filename of a channel */
int ast_monitor_change_fname(struct ast_channel *chan, const char *fname_base, int need_lock)
{
char tmp[256];
if (ast_strlen_zero(fname_base)) {
ast_log(LOG_WARNING, "Cannot change monitor filename of channel %s to null", chan->name);
return -1;
}
LOCK_IF_NEEDED(chan, need_lock);
if (chan->monitor) {
int directory = strchr(fname_base, '/') ? 1 : 0;
/* try creating the directory just in case it doesn't exist */
if (directory) {
char *name = strdup(fname_base);
snprintf(tmp, sizeof(tmp), "mkdir -p %s",dirname(name));
free(name);
ast_safe_system(tmp);
}
snprintf(chan->monitor->filename_base, FILENAME_MAX, "%s/%s", directory ? "" : ast_config_AST_MONITOR_DIR, fname_base);
} else {
ast_log(LOG_WARNING, "Cannot change monitor filename of channel %s to %s, monitoring not started\n", chan->name, fname_base);
}
UNLOCK_IF_NEEDED(chan, need_lock);
return 0;
}
/*!
* \brief Change monitored filename of channel
* \param chan
* \param fname_base new filename
* \param need_lock
* \retval 0 on success.
* \retval -1 on failure.
*/
int AST_OPTIONAL_API_NAME(ast_monitor_change_fname)(struct ast_channel *chan, const char *fname_base, int need_lock)
{
if (ast_strlen_zero(fname_base)) {
ast_log(LOG_WARNING, "Cannot change monitor filename of channel %s to null\n", ast_channel_name(chan));
return -1;
}
LOCK_IF_NEEDED(chan, need_lock);
if (ast_channel_monitor(chan)) {
int directory = strchr(fname_base, '/') ? 1 : 0;
const char *absolute = *fname_base == '/' ? "" : ast_config_AST_MONITOR_DIR;
const char *absolute_suffix = *fname_base == '/' ? "" : "/";
char tmpstring[sizeof(ast_channel_monitor(chan)->filename_base)] = "";
int i, fd[2] = { -1, -1 }, doexit = 0;
/* before continuing, see if we're trying to rename the file to itself... */
snprintf(tmpstring, sizeof(tmpstring), "%s%s%s", absolute, absolute_suffix, fname_base);
/* try creating the directory just in case it doesn't exist */
if (directory) {
char *name = ast_strdupa(tmpstring);
ast_mkdir(dirname(name), 0777);
}
/*!
* \note We cannot just compare filenames, due to symlinks, relative
* paths, and other possible filesystem issues. We could use
* realpath(3), but its use is discouraged. However, if we try to
* create the same file from two different paths, the second will
* fail, and so we have our notification that the filenames point to
* the same path.
*
* Remember, also, that we're using the basename of the file (i.e.
* the file without the format suffix), so it does not already exist
* and we aren't interfering with the recording itself.
*/
ast_debug(2, "comparing tmpstring %s to filename_base %s\n", tmpstring, ast_channel_monitor(chan)->filename_base);
if ((fd[0] = open(tmpstring, O_CREAT | O_WRONLY, 0644)) < 0 ||
(fd[1] = open(ast_channel_monitor(chan)->filename_base, O_CREAT | O_EXCL | O_WRONLY, 0644)) < 0) {
if (fd[0] < 0) {
ast_log(LOG_ERROR, "Unable to compare filenames: %s\n", strerror(errno));
} else {
ast_debug(2, "No need to rename monitor filename to itself\n");
}
doexit = 1;
}
/* Cleanup temporary files */
for (i = 0; i < 2; i++) {
if (fd[i] >= 0) {
while (close(fd[i]) < 0 && errno == EINTR);
}
}
unlink(tmpstring);
/* if previous monitor file existed in a subdirectory, the directory will not be removed */
unlink(ast_channel_monitor(chan)->filename_base);
if (doexit) {
UNLOCK_IF_NEEDED(chan, need_lock);
return 0;
}
ast_copy_string(ast_channel_monitor(chan)->filename_base, tmpstring, sizeof(ast_channel_monitor(chan)->filename_base));
ast_channel_monitor(chan)->filename_changed = 1;
} else {
ast_log(LOG_WARNING, "Cannot change monitor filename of channel %s to %s, monitoring not started\n", ast_channel_name(chan), fname_base);
}
UNLOCK_IF_NEEDED(chan, need_lock);
return 0;
}
/*!
* \brief Stop monitoring channel
* \param chan
* \param need_lock
* Stop the recording, close any open streams, mix in/out channels if required
* \return Always 0
*/
int AST_OPTIONAL_API_NAME(ast_monitor_stop)(struct ast_channel *chan, int need_lock)
{
int delfiles = 0;
LOCK_IF_NEEDED(chan, need_lock);
if (ast_channel_monitor(chan)) {
char filename[ FILENAME_MAX ];
if (ast_channel_monitor(chan)->read_stream) {
ast_closestream(ast_channel_monitor(chan)->read_stream);
}
if (ast_channel_monitor(chan)->write_stream) {
ast_closestream(ast_channel_monitor(chan)->write_stream);
}
if (ast_channel_monitor(chan)->filename_changed && !ast_strlen_zero(ast_channel_monitor(chan)->filename_base)) {
if (ast_channel_monitor(chan)->read_stream) {
if (ast_fileexists(ast_channel_monitor(chan)->read_filename,NULL,NULL) > 0) {
snprintf(filename, FILENAME_MAX, "%s-in", ast_channel_monitor(chan)->filename_base);
if (ast_fileexists(filename, NULL, NULL) > 0) {
ast_filedelete(filename, NULL);
}
ast_filerename(ast_channel_monitor(chan)->read_filename, filename, ast_channel_monitor(chan)->format);
} else {
ast_log(LOG_WARNING, "File %s not found\n", ast_channel_monitor(chan)->read_filename);
}
}
if (ast_channel_monitor(chan)->write_stream) {
if (ast_fileexists(ast_channel_monitor(chan)->write_filename,NULL,NULL) > 0) {
snprintf(filename, FILENAME_MAX, "%s-out", ast_channel_monitor(chan)->filename_base);
if (ast_fileexists(filename, NULL, NULL) > 0) {
ast_filedelete(filename, NULL);
}
ast_filerename(ast_channel_monitor(chan)->write_filename, filename, ast_channel_monitor(chan)->format);
} else {
ast_log(LOG_WARNING, "File %s not found\n", ast_channel_monitor(chan)->write_filename);
}
}
}
if (ast_channel_monitor(chan)->joinfiles && !ast_strlen_zero(ast_channel_monitor(chan)->filename_base)) {
char tmp[1024];
char tmp2[1024];
const char *format = !strcasecmp(ast_channel_monitor(chan)->format,"wav49") ? "WAV" : ast_channel_monitor(chan)->format;
char *fname_base = ast_channel_monitor(chan)->filename_base;
const char *execute, *execute_args;
/* at this point, fname_base really is the full path */
/* Set the execute application */
execute = pbx_builtin_getvar_helper(chan, "MONITOR_EXEC");
if (ast_strlen_zero(execute)) {
#ifdef HAVE_SOXMIX
execute = "nice -n 19 soxmix";
#else
execute = "nice -n 19 sox -m";
#endif
format = get_soxmix_format(format);
delfiles = 1;
}
execute_args = pbx_builtin_getvar_helper(chan, "MONITOR_EXEC_ARGS");
if (ast_strlen_zero(execute_args)) {
execute_args = "";
}
snprintf(tmp, sizeof(tmp), "%s \"%s-in.%s\" \"%s-out.%s\" \"%s.%s\" %s &",
execute, fname_base, format, fname_base, format, fname_base, format,execute_args);
if (delfiles) {
snprintf(tmp2,sizeof(tmp2), "( %s& rm -f \"%s-\"* ) &",tmp, fname_base); /* remove legs when done mixing */
ast_copy_string(tmp, tmp2, sizeof(tmp));
}
ast_debug(1,"monitor executing %s\n",tmp);
if (ast_safe_system(tmp) == -1)
ast_log(LOG_WARNING, "Execute of %s failed.\n",tmp);
}
ast_free(ast_channel_monitor(chan)->format);
ast_free(ast_channel_monitor(chan));
ast_channel_monitor_set(chan, NULL);
ast_manager_event(chan, EVENT_FLAG_CALL, "MonitorStop",
"Channel: %s\r\n"
"Uniqueid: %s\r\n",
ast_channel_name(chan),
ast_channel_uniqueid(chan)
);
pbx_builtin_setvar_helper(chan, "MONITORED", NULL);
}
pbx_builtin_setvar_helper(chan, "AUTO_MONITOR", NULL);
UNLOCK_IF_NEEDED(chan, need_lock);
return 0;
}
/*! \brief Start monitoring a channel
* \param chan ast_channel struct to record
* \param format_spec file format to use for recording
* \param fname_base filename base to record to
* \param need_lock whether to lock the channel mutex
* \param stream_action whether to record the input and/or output streams. X_REC_IN | X_REC_OUT is most often used
* Creates the file to record, if no format is specified it assumes WAV
* It also sets channel variable __MONITORED=yes
* \retval 0 on success
* \retval -1 on failure
*/
int AST_OPTIONAL_API_NAME(ast_monitor_start)(struct ast_channel *chan, const char *format_spec,
const char *fname_base, int need_lock, int stream_action)
{
int res = 0;
LOCK_IF_NEEDED(chan, need_lock);
if (!(ast_channel_monitor(chan))) {
struct ast_channel_monitor *monitor;
char *channel_name, *p;
/* Create monitoring directory if needed */
ast_mkdir(ast_config_AST_MONITOR_DIR, 0777);
if (!(monitor = ast_calloc(1, sizeof(*monitor)))) {
UNLOCK_IF_NEEDED(chan, need_lock);
return -1;
}
/* Determine file names */
if (!ast_strlen_zero(fname_base)) {
int directory = strchr(fname_base, '/') ? 1 : 0;
const char *absolute = *fname_base == '/' ? "" : ast_config_AST_MONITOR_DIR;
const char *absolute_suffix = *fname_base == '/' ? "" : "/";
snprintf(monitor->read_filename, FILENAME_MAX, "%s%s%s-in",
absolute, absolute_suffix, fname_base);
snprintf(monitor->write_filename, FILENAME_MAX, "%s%s%s-out",
absolute, absolute_suffix, fname_base);
snprintf(monitor->filename_base, FILENAME_MAX, "%s%s%s",
absolute, absolute_suffix, fname_base);
/* try creating the directory just in case it doesn't exist */
if (directory) {
char *name = ast_strdupa(monitor->filename_base);
ast_mkdir(dirname(name), 0777);
}
} else {
ast_mutex_lock(&monitorlock);
snprintf(monitor->read_filename, FILENAME_MAX, "%s/audio-in-%lu",
ast_config_AST_MONITOR_DIR, seq);
snprintf(monitor->write_filename, FILENAME_MAX, "%s/audio-out-%lu",
ast_config_AST_MONITOR_DIR, seq);
seq++;
ast_mutex_unlock(&monitorlock);
/* Replace all '/' chars from the channel name with '-' chars. */
channel_name = ast_strdupa(ast_channel_name(chan));
for (p = channel_name; (p = strchr(p, '/')); ) {
*p = '-';
}
snprintf(monitor->filename_base, FILENAME_MAX, "%s/%d-%s",
ast_config_AST_MONITOR_DIR, (int)time(NULL), channel_name);
monitor->filename_changed = 1;
}
monitor->stop = ast_monitor_stop;
/* Determine file format */
if (!ast_strlen_zero(format_spec)) {
monitor->format = ast_strdup(format_spec);
} else {
monitor->format = ast_strdup("wav");
}
/* open files */
if (stream_action & X_REC_IN) {
if (ast_fileexists(monitor->read_filename, NULL, NULL) > 0)
ast_filedelete(monitor->read_filename, NULL);
if (!(monitor->read_stream = ast_writefile(monitor->read_filename,
monitor->format, NULL,
O_CREAT|O_TRUNC|O_WRONLY, 0, AST_FILE_MODE))) {
ast_log(LOG_WARNING, "Could not create file %s\n",
monitor->read_filename);
ast_free(monitor);
UNLOCK_IF_NEEDED(chan, need_lock);
return -1;
}
} else
monitor->read_stream = NULL;
if (stream_action & X_REC_OUT) {
if (ast_fileexists(monitor->write_filename, NULL, NULL) > 0) {
ast_filedelete(monitor->write_filename, NULL);
}
if (!(monitor->write_stream = ast_writefile(monitor->write_filename,
monitor->format, NULL,
O_CREAT|O_TRUNC|O_WRONLY, 0, AST_FILE_MODE))) {
ast_log(LOG_WARNING, "Could not create file %s\n",
monitor->write_filename);
if (monitor->read_stream) {
ast_closestream(monitor->read_stream);
}
ast_free(monitor);
UNLOCK_IF_NEEDED(chan, need_lock);
return -1;
}
} else
monitor->write_stream = NULL;
ast_channel_monitor_set(chan, monitor);
ast_monitor_set_state(chan, AST_MONITOR_RUNNING);
/* so we know this call has been monitored in case we need to bill for it or something */
pbx_builtin_setvar_helper(chan, "__MONITORED","true");
ast_manager_event(chan, EVENT_FLAG_CALL, "MonitorStart",
"Channel: %s\r\n"
"Uniqueid: %s\r\n",
ast_channel_name(chan),
ast_channel_uniqueid(chan));
} else {
ast_debug(1,"Cannot start monitoring %s, already monitored\n", ast_channel_name(chan));
res = -1;
}
UNLOCK_IF_NEEDED(chan, need_lock);
return res;
}
/* Stop monitoring a channel */
int ast_monitor_stop(struct ast_channel *chan, int need_lock)
{
int delfiles = 0;
LOCK_IF_NEEDED(chan, need_lock);
if (chan->monitor) {
char filename[ FILENAME_MAX ];
if (chan->monitor->read_stream) {
ast_closestream(chan->monitor->read_stream);
}
if (chan->monitor->write_stream) {
ast_closestream(chan->monitor->write_stream);
}
if (chan->monitor->filename_changed && !ast_strlen_zero(chan->monitor->filename_base)) {
if (ast_fileexists(chan->monitor->read_filename,NULL,NULL) > 0) {
snprintf(filename, FILENAME_MAX, "%s-in", chan->monitor->filename_base);
if (ast_fileexists(filename, NULL, NULL) > 0) {
ast_filedelete(filename, NULL);
}
ast_filerename(chan->monitor->read_filename, filename, chan->monitor->format);
} else {
ast_log(LOG_WARNING, "File %s not found\n", chan->monitor->read_filename);
}
if (ast_fileexists(chan->monitor->write_filename,NULL,NULL) > 0) {
snprintf(filename, FILENAME_MAX, "%s-out", chan->monitor->filename_base);
if (ast_fileexists(filename, NULL, NULL) > 0) {
ast_filedelete(filename, NULL);
}
ast_filerename(chan->monitor->write_filename, filename, chan->monitor->format);
} else {
ast_log(LOG_WARNING, "File %s not found\n", chan->monitor->write_filename);
}
}
if (chan->monitor->joinfiles && !ast_strlen_zero(chan->monitor->filename_base)) {
char tmp[1024];
char tmp2[1024];
char *format = !strcasecmp(chan->monitor->format,"wav49") ? "WAV" : chan->monitor->format;
char *name = chan->monitor->filename_base;
int directory = strchr(name, '/') ? 1 : 0;
char *dir = directory ? "" : ast_config_AST_MONITOR_DIR;
const char *execute, *execute_args;
/* Set the execute application */
execute = pbx_builtin_getvar_helper(chan, "MONITOR_EXEC");
if (ast_strlen_zero(execute)) {
execute = "nice -n 19 soxmix";
delfiles = 1;
}
execute_args = pbx_builtin_getvar_helper(chan, "MONITOR_EXEC_ARGS");
if (ast_strlen_zero(execute_args)) {
execute_args = "";
}
snprintf(tmp, sizeof(tmp), "%s \"%s/%s-in.%s\" \"%s/%s-out.%s\" \"%s/%s.%s\" %s &", execute, dir, name, format, dir, name, format, dir, name, format,execute_args);
if (delfiles) {
snprintf(tmp2,sizeof(tmp2), "( %s& rm -f \"%s/%s-\"* ) &",tmp, dir ,name); /* remove legs when done mixing */
ast_copy_string(tmp, tmp2, sizeof(tmp));
}
ast_log(LOG_DEBUG,"monitor executing %s\n",tmp);
if (ast_safe_system(tmp) == -1)
ast_log(LOG_WARNING, "Execute of %s failed.\n",tmp);
}
free(chan->monitor->format);
free(chan->monitor);
chan->monitor = NULL;
}
UNLOCK_IF_NEEDED(chan, need_lock);
return 0;
}
/* Start monitoring a channel */
int ast_monitor_start( struct ast_channel *chan, const char *format_spec,
const char *fname_base, int need_lock)
{
int res = 0;
char tmp[256];
LOCK_IF_NEEDED(chan, need_lock);
if (!(chan->monitor)) {
struct ast_channel_monitor *monitor;
char *channel_name, *p;
/* Create monitoring directory if needed */
if (mkdir(ast_config_AST_MONITOR_DIR, 0770) < 0) {
if (errno != EEXIST) {
ast_log(LOG_WARNING, "Unable to create audio monitor directory: %s\n",
strerror(errno));
}
}
if (!(monitor = ast_calloc(1, sizeof(*monitor)))) {
UNLOCK_IF_NEEDED(chan, need_lock);
return -1;
}
/* Determine file names */
if (!ast_strlen_zero(fname_base)) {
int directory = strchr(fname_base, '/') ? 1 : 0;
/* try creating the directory just in case it doesn't exist */
if (directory) {
char *name = strdup(fname_base);
snprintf(tmp, sizeof(tmp), "mkdir -p \"%s\"",dirname(name));
free(name);
ast_safe_system(tmp);
}
snprintf(monitor->read_filename, FILENAME_MAX, "%s/%s-in",
directory ? "" : ast_config_AST_MONITOR_DIR, fname_base);
snprintf(monitor->write_filename, FILENAME_MAX, "%s/%s-out",
directory ? "" : ast_config_AST_MONITOR_DIR, fname_base);
ast_copy_string(monitor->filename_base, fname_base, sizeof(monitor->filename_base));
} else {
ast_mutex_lock(&monitorlock);
snprintf(monitor->read_filename, FILENAME_MAX, "%s/audio-in-%ld",
ast_config_AST_MONITOR_DIR, seq);
snprintf(monitor->write_filename, FILENAME_MAX, "%s/audio-out-%ld",
ast_config_AST_MONITOR_DIR, seq);
seq++;
ast_mutex_unlock(&monitorlock);
channel_name = ast_strdupa(chan->name);
while ((p = strchr(channel_name, '/'))) {
*p = '-';
}
snprintf(monitor->filename_base, FILENAME_MAX, "%s/%d-%s",
ast_config_AST_MONITOR_DIR, (int)time(NULL), channel_name);
monitor->filename_changed = 1;
}
monitor->stop = ast_monitor_stop;
/* Determine file format */
if (!ast_strlen_zero(format_spec)) {
monitor->format = strdup(format_spec);
} else {
monitor->format = strdup("wav");
}
/* open files */
if (ast_fileexists(monitor->read_filename, NULL, NULL) > 0) {
ast_filedelete(monitor->read_filename, NULL);
}
if (!(monitor->read_stream = ast_writefile(monitor->read_filename,
monitor->format, NULL,
O_CREAT|O_TRUNC|O_WRONLY, 0, 0644))) {
ast_log(LOG_WARNING, "Could not create file %s\n",
monitor->read_filename);
free(monitor);
ast_channel_unlock(chan);
return -1;
}
if (ast_fileexists(monitor->write_filename, NULL, NULL) > 0) {
ast_filedelete(monitor->write_filename, NULL);
}
if (!(monitor->write_stream = ast_writefile(monitor->write_filename,
monitor->format, NULL,
O_CREAT|O_TRUNC|O_WRONLY, 0, 0644))) {
ast_log(LOG_WARNING, "Could not create file %s\n",
monitor->write_filename);
ast_closestream(monitor->read_stream);
free(monitor);
ast_channel_unlock(chan);
return -1;
}
chan->monitor = monitor;
ast_monitor_set_state(chan, AST_MONITOR_RUNNING);
/* so we know this call has been monitored in case we need to bill for it or something */
pbx_builtin_setvar_helper(chan, "__MONITORED","true");
} else {
ast_log(LOG_DEBUG,"Cannot start monitoring %s, already monitored\n",
chan->name);
res = -1;
}
UNLOCK_IF_NEEDED(chan, need_lock);
return res;
}