void ast_ari_channels_get(struct ast_variable *headers,
struct ast_ari_channels_get_args *args,
struct ast_ari_response *response)
{
RAII_VAR(struct stasis_message *, msg, NULL, ao2_cleanup);
struct stasis_cache *cache;
struct ast_channel_snapshot *snapshot;
cache = ast_channel_cache();
if (!cache) {
ast_ari_response_error(
response, 500, "Internal Server Error",
"Message bus not initialized");
return;
}
msg = stasis_cache_get(cache, ast_channel_snapshot_type(),
args->channel_id);
if (!msg) {
ast_ari_response_error(
response, 404, "Not Found",
"Channel not found");
return;
}
snapshot = stasis_message_data(msg);
ast_assert(snapshot != NULL);
ast_ari_response_ok(response,
ast_channel_snapshot_to_json(snapshot, NULL));
}
static int send_bridge_info_item_cb(void *obj, void *arg, void *data, int flags)
{
char *uniqueid = obj;
struct mansession *s = arg;
char *id_text = data;
RAII_VAR(struct stasis_message *, msg, NULL, ao2_cleanup);
struct ast_channel_snapshot *snapshot;
RAII_VAR(struct ast_str *, channel_text, NULL, ast_free);
msg = stasis_cache_get(ast_channel_cache(),
ast_channel_snapshot_type(), uniqueid);
if (!msg) {
return 0;
}
snapshot = stasis_message_data(msg);
if (snapshot->tech_properties & AST_CHAN_TP_INTERNAL) {
return 0;
}
channel_text = ast_manager_build_channel_state_string(snapshot);
if (!channel_text) {
return 0;
}
astman_append(s,
"Event: BridgeInfoChannel\r\n"
"%s"
"%s"
"\r\n",
ast_str_buffer(channel_text),
id_text);
return 0;
}
static const char *channel_snapshot_get_name(struct stasis_message *message)
{
struct ast_channel_snapshot *snapshot;
if (ast_channel_snapshot_type() != stasis_message_type(message)) {
return NULL;
}
snapshot = stasis_message_data(message);
return snapshot->name;
}
void ast_ari_channels_list(struct ast_variable *headers,
struct ast_ari_channels_list_args *args,
struct ast_ari_response *response)
{
RAII_VAR(struct stasis_cache *, cache, NULL, ao2_cleanup);
RAII_VAR(struct ao2_container *, snapshots, NULL, ao2_cleanup);
RAII_VAR(struct ast_json *, json, NULL, ast_json_unref);
struct ao2_iterator i;
void *obj;
struct stasis_message_sanitizer *sanitize = stasis_app_get_sanitizer();
cache = ast_channel_cache();
if (!cache) {
ast_ari_response_error(
response, 500, "Internal Server Error",
"Message bus not initialized");
return;
}
ao2_ref(cache, +1);
snapshots = stasis_cache_dump(cache, ast_channel_snapshot_type());
if (!snapshots) {
ast_ari_response_alloc_failed(response);
return;
}
json = ast_json_array_create();
if (!json) {
ast_ari_response_alloc_failed(response);
return;
}
for (i = ao2_iterator_init(snapshots, 0);
(obj = ao2_iterator_next(&i)); ao2_cleanup(obj)) {
RAII_VAR(struct stasis_message *, msg, obj, ao2_cleanup);
struct ast_channel_snapshot *snapshot = stasis_message_data(msg);
int r;
if (sanitize && sanitize->channel_snapshot
&& sanitize->channel_snapshot(snapshot)) {
continue;
}
r = ast_json_array_append(
json, ast_channel_snapshot_to_json(snapshot, NULL));
if (r != 0) {
ast_ari_response_alloc_failed(response);
ao2_cleanup(obj);
ao2_iterator_destroy(&i);
return;
}
}
ao2_iterator_destroy(&i);
ast_ari_response_ok(response, ast_json_ref(json));
}
struct ast_channel_snapshot *stasis_app_control_get_snapshot(
const struct stasis_app_control *control)
{
RAII_VAR(struct stasis_message *, msg, NULL, ao2_cleanup);
struct ast_channel_snapshot *snapshot;
msg = stasis_cache_get(ast_channel_cache(), ast_channel_snapshot_type(),
stasis_app_control_get_channel_id(control));
if (!msg) {
return NULL;
}
snapshot = stasis_message_data(msg);
ast_assert(snapshot != NULL);
ao2_ref(snapshot, +1);
return snapshot;
}
struct ast_channel_snapshot *ast_channel_snapshot_get_latest_by_name(const char *name)
{
RAII_VAR(struct stasis_message *, message, NULL, ao2_cleanup);
struct ast_channel_snapshot *snapshot;
ast_assert(!ast_strlen_zero(name));
message = stasis_cache_get(ast_channel_cache_by_name(),
ast_channel_snapshot_type(),
name);
if (!message) {
return NULL;
}
snapshot = stasis_message_data(message);
if (!snapshot) {
return NULL;
}
ao2_ref(snapshot, +1);
return snapshot;
}
/*!
* \brief Router callback for \ref stasis_cache_update messages.
* \param data Data pointer given when added to router.
* \param sub This subscription.
* \param topic The topic the message was posted to. This is not necessarily the
* topic you subscribed to, since messages may be forwarded between
* topics.
* \param message The message itself.
*/
static void updates(void *data, struct stasis_subscription *sub,
struct stasis_message *message)
{
/* Since this came from a message router, we know the type of the
* message. We can cast the data without checking its type.
*/
struct stasis_cache_update *update = stasis_message_data(message);
/* We're only interested in channel snapshots, so check the type
* of the underlying message.
*/
if (ast_channel_snapshot_type() != update->type) {
return;
}
/* There are three types of cache updates.
* !old && new -> Initial cache entry
* old && new -> Updated cache entry
* old && !new -> Cache entry removed.
*/
if (!update->old_snapshot && update->new_snapshot) {
/* Initial cache entry; count a channel creation */
ast_statsd_log("channels.count", AST_STATSD_COUNTER, 1);
} else if (update->old_snapshot && !update->new_snapshot) {
/* Cache entry removed. Compute the age of the channel and post
* that, as well as decrementing the channel count.
*/
struct ast_channel_snapshot *last;
int64_t age;
last = stasis_message_data(update->old_snapshot);
age = ast_tvdiff_ms(*stasis_message_timestamp(message),
last->creationtime);
ast_statsd_log("channels.calltime", AST_STATSD_TIMER, age);
/* And decrement the channel count */
ast_statsd_log("channels.count", AST_STATSD_COUNTER, -1);
}
}
static void sub_channel_update_handler(void *data,
struct stasis_subscription *sub,
struct stasis_message *message)
{
struct stasis_app *app = data;
struct stasis_cache_update *update;
struct ast_channel_snapshot *new_snapshot;
struct ast_channel_snapshot *old_snapshot;
const struct timeval *tv;
int i;
ast_assert(stasis_message_type(message) == stasis_cache_update_type());
update = stasis_message_data(message);
ast_assert(update->type == ast_channel_snapshot_type());
new_snapshot = stasis_message_data(update->new_snapshot);
old_snapshot = stasis_message_data(update->old_snapshot);
/* Pull timestamp from the new snapshot, or from the update message
* when there isn't one. */
tv = update->new_snapshot ?
stasis_message_timestamp(update->new_snapshot) :
stasis_message_timestamp(message);
for (i = 0; i < ARRAY_LEN(channel_monitors); ++i) {
RAII_VAR(struct ast_json *, msg, NULL, ast_json_unref);
msg = channel_monitors[i](old_snapshot, new_snapshot, tv);
if (msg) {
app_send(app, msg);
}
}
if (!new_snapshot && old_snapshot) {
unsubscribe(app, "channel", old_snapshot->uniqueid, 1);
}
}
void ast_channel_publish_snapshot(struct ast_channel *chan)
{
RAII_VAR(struct ast_channel_snapshot *, snapshot, NULL, ao2_cleanup);
RAII_VAR(struct stasis_message *, message, NULL, ao2_cleanup);
if (ast_test_flag(ast_channel_flags(chan), AST_FLAG_SNAPSHOT_STAGE)) {
return;
}
snapshot = ast_channel_snapshot_create(chan);
if (!snapshot) {
return;
}
message = stasis_message_create(ast_channel_snapshot_type(), snapshot);
if (!message) {
return;
}
ast_assert(ast_channel_topic(chan) != NULL);
stasis_publish(ast_channel_topic(chan), message);
}
void ast_publish_channel_state(struct ast_channel *chan)
{
RAII_VAR(struct ast_channel_snapshot *, snapshot, NULL, ao2_cleanup);
RAII_VAR(struct stasis_message *, message, NULL, ao2_cleanup);
ast_assert(chan != NULL);
if (!chan) {
return;
}
snapshot = ast_channel_snapshot_create(chan);
if (!snapshot) {
return;
}
message = stasis_message_create(ast_channel_snapshot_type(), snapshot);
if (!message) {
return;
}
ast_assert(ast_channel_topic(chan) != NULL);
stasis_publish(ast_channel_topic(chan), message);
}
struct stasis_app *app_create(const char *name, stasis_app_cb handler, void *data, enum stasis_app_subscription_model subscription_model)
{
RAII_VAR(struct stasis_app *, app, NULL, ao2_cleanup);
size_t size;
int res = 0;
size_t context_size = strlen("stasis-") + strlen(name) + 1;
char context_name[context_size];
ast_assert(name != NULL);
ast_assert(handler != NULL);
ast_verb(1, "Creating Stasis app '%s'\n", name);
size = sizeof(*app) + strlen(name) + 1;
app = ao2_alloc_options(size, app_dtor, AO2_ALLOC_OPT_LOCK_MUTEX);
if (!app) {
return NULL;
}
app->subscription_model = subscription_model;
app->forwards = ao2_container_alloc_rbtree(AO2_ALLOC_OPT_LOCK_MUTEX,
AO2_CONTAINER_ALLOC_OPT_DUPS_OBJ_REJECT,
forwards_sort, NULL);
if (!app->forwards) {
return NULL;
}
app->topic = stasis_topic_create(name);
if (!app->topic) {
return NULL;
}
app->bridge_router = stasis_message_router_create(ast_bridge_topic_all());
if (!app->bridge_router) {
return NULL;
}
res |= stasis_message_router_add(app->bridge_router,
ast_bridge_merge_message_type(), bridge_merge_handler, app);
res |= stasis_message_router_add(app->bridge_router,
ast_blind_transfer_type(), bridge_blind_transfer_handler, app);
res |= stasis_message_router_add(app->bridge_router,
ast_attended_transfer_type(), bridge_attended_transfer_handler, app);
res |= stasis_message_router_add(app->bridge_router,
stasis_subscription_change_type(), bridge_subscription_change_handler, app);
if (res != 0) {
return NULL;
}
/* Bridge router holds a reference */
ao2_ref(app, +1);
app->router = stasis_message_router_create(app->topic);
if (!app->router) {
return NULL;
}
res |= stasis_message_router_add(app->router,
ast_bridge_snapshot_type(), sub_bridge_update_handler, app);
res |= stasis_message_router_add(app->router,
ast_channel_snapshot_type(), sub_channel_update_handler, app);
res |= stasis_message_router_add_cache_update(app->router,
ast_endpoint_snapshot_type(), sub_endpoint_update_handler, app);
res |= stasis_message_router_add(app->router,
stasis_subscription_change_type(), sub_subscription_change_handler, app);
stasis_message_router_set_formatters_default(app->router,
sub_default_handler, app, STASIS_SUBSCRIPTION_FORMATTER_JSON);
if (res != 0) {
return NULL;
}
/* Router holds a reference */
ao2_ref(app, +1);
strncpy(app->name, name, size - sizeof(*app));
app->handler = handler;
app->data = ao2_bump(data);
/* Create a context, a match-all extension, and a 'h' extension for this application. Note that
* this should only be done if a context does not already exist. */
strcpy(context_name, "stasis-");
strcat(context_name, name);
if (!ast_context_find(context_name)) {
if (!ast_context_find_or_create(NULL, NULL, context_name, "res_stasis")) {
ast_log(LOG_WARNING, "Could not create context '%s' for Stasis application '%s'\n", context_name, name);
} else {
ast_add_extension(context_name, 0, "_.", 1, NULL, NULL, "Stasis", ast_strdup(name), ast_free_ptr, "res_stasis");
ast_add_extension(context_name, 0, "h", 1, NULL, NULL, "NoOp", NULL, NULL, "res_stasis");
}
} else {
ast_log(LOG_WARNING, "Not creating context '%s' for Stasis application '%s' because it already exists\n",
context_name, name);
}
ao2_ref(app, +1);
return app;
}
struct stasis_app *app_create(const char *name, stasis_app_cb handler, void *data)
{
RAII_VAR(struct stasis_app *, app, NULL, ao2_cleanup);
size_t size;
int res = 0;
ast_assert(name != NULL);
ast_assert(handler != NULL);
ast_verb(1, "Creating Stasis app '%s'\n", name);
size = sizeof(*app) + strlen(name) + 1;
app = ao2_alloc_options(size, app_dtor, AO2_ALLOC_OPT_LOCK_MUTEX);
if (!app) {
return NULL;
}
app->forwards = ao2_container_alloc_rbtree(AO2_ALLOC_OPT_LOCK_MUTEX,
AO2_CONTAINER_ALLOC_OPT_DUPS_OBJ_REJECT,
forwards_sort, NULL);
if (!app->forwards) {
return NULL;
}
app->topic = stasis_topic_create(name);
if (!app->topic) {
return NULL;
}
app->bridge_router = stasis_message_router_create(ast_bridge_topic_all());
if (!app->bridge_router) {
return NULL;
}
res |= stasis_message_router_add(app->bridge_router,
ast_bridge_merge_message_type(), bridge_merge_handler, app);
res |= stasis_message_router_add(app->bridge_router,
ast_blind_transfer_type(), bridge_blind_transfer_handler, app);
res |= stasis_message_router_add(app->bridge_router,
ast_attended_transfer_type(), bridge_attended_transfer_handler, app);
res |= stasis_message_router_set_default(app->bridge_router,
bridge_default_handler, app);
if (res != 0) {
return NULL;
}
/* Bridge router holds a reference */
ao2_ref(app, +1);
app->router = stasis_message_router_create(app->topic);
if (!app->router) {
return NULL;
}
res |= stasis_message_router_add_cache_update(app->router,
ast_bridge_snapshot_type(), sub_bridge_update_handler, app);
res |= stasis_message_router_add_cache_update(app->router,
ast_channel_snapshot_type(), sub_channel_update_handler, app);
res |= stasis_message_router_add_cache_update(app->router,
ast_endpoint_snapshot_type(), sub_endpoint_update_handler, app);
res |= stasis_message_router_set_default(app->router,
sub_default_handler, app);
if (res != 0) {
return NULL;
}
/* Router holds a reference */
ao2_ref(app, +1);
strncpy(app->name, name, size - sizeof(*app));
app->handler = handler;
ao2_ref(data, +1);
app->data = data;
ao2_ref(app, +1);
return app;
}
