int app_subscribe_endpoint(struct stasis_app *app, struct ast_endpoint *endpoint)
{
if (!app || !endpoint) {
return -1;
} else {
RAII_VAR(struct app_forwards *, forwards, NULL, ao2_cleanup);
SCOPED_AO2LOCK(lock, app->forwards);
forwards = ao2_find(app->forwards, ast_endpoint_get_id(endpoint),
OBJ_SEARCH_KEY | OBJ_NOLOCK);
if (!forwards) {
/* Forwards not found, create one */
forwards = forwards_create_endpoint(app, endpoint);
if (!forwards) {
return -1;
}
ao2_link_flags(app->forwards, forwards, OBJ_NOLOCK);
/* Subscribe for messages */
messaging_app_subscribe_endpoint(app->name, endpoint, &message_received_handler, app);
}
++forwards->interested;
ast_debug(3, "Endpoint '%s' is %d interested in %s\n", ast_endpoint_get_id(endpoint), forwards->interested, app->name);
return 0;
}
}
int app_subscribe_endpoint(struct stasis_app *app, struct ast_endpoint *endpoint)
{
struct app_forwards *forwards;
if (!app) {
return -1;
}
ao2_lock(app->forwards);
/* If subscribed to all, don't subscribe again */
forwards = ao2_find(app->forwards, ENDPOINT_ALL, OBJ_SEARCH_KEY | OBJ_NOLOCK);
if (forwards) {
ao2_unlock(app->forwards);
ao2_ref(forwards, -1);
return 0;
}
forwards = ao2_find(app->forwards,
endpoint ? ast_endpoint_get_id(endpoint) : ENDPOINT_ALL,
OBJ_SEARCH_KEY | OBJ_NOLOCK);
if (!forwards) {
int res;
/* Forwards not found, create one */
forwards = forwards_create_endpoint(app, endpoint);
if (!forwards) {
ao2_unlock(app->forwards);
return -1;
}
res = ao2_link_flags(app->forwards, forwards, OBJ_NOLOCK);
if (!res) {
ao2_unlock(app->forwards);
ao2_ref(forwards, -1);
return -1;
}
/* Subscribe for messages */
messaging_app_subscribe_endpoint(app->name, endpoint, &message_received_handler, app);
}
++forwards->interested;
ast_debug(3, "Endpoint '%s' is %d interested in %s\n",
endpoint ? ast_endpoint_get_id(endpoint) : "ALL",
forwards->interested,
app->name);
ao2_unlock(app->forwards);
ao2_ref(forwards, -1);
return 0;
}
/*! Forward a endpoint's topics to an app */
static struct app_forwards *forwards_create_endpoint(struct stasis_app *app,
struct ast_endpoint *endpoint)
{
RAII_VAR(struct app_forwards *, forwards, NULL, ao2_cleanup);
if (!app || !endpoint) {
return NULL;
}
forwards = forwards_create(app, ast_endpoint_get_id(endpoint));
if (!forwards) {
return NULL;
}
forwards->forward_type = FORWARD_ENDPOINT;
forwards->topic_forward = stasis_forward_all(ast_endpoint_topic(endpoint),
app->topic);
if (!forwards->topic_forward) {
return NULL;
}
forwards->topic_cached_forward = stasis_forward_all(
ast_endpoint_topic_cached(endpoint), app->topic);
if (!forwards->topic_cached_forward) {
/* Half-subscribed is a bad thing */
stasis_forward_cancel(forwards->topic_forward);
forwards->topic_forward = NULL;
return NULL;
}
ao2_ref(forwards, +1);
return forwards;
}
/*! Forward a endpoint's topics to an app */
static struct app_forwards *forwards_create_endpoint(struct stasis_app *app,
struct ast_endpoint *endpoint)
{
struct app_forwards *forwards;
int ret = 0;
if (!app) {
return NULL;
}
forwards = forwards_create(app, endpoint ? ast_endpoint_get_id(endpoint) : ENDPOINT_ALL);
if (!forwards) {
return NULL;
}
forwards->forward_type = FORWARD_ENDPOINT;
if (endpoint) {
forwards->topic_forward = stasis_forward_all(ast_endpoint_topic(endpoint),
app->topic);
forwards->topic_cached_forward = stasis_forward_all(
ast_endpoint_topic_cached(endpoint), app->topic);
if (!forwards->topic_forward || !forwards->topic_cached_forward) {
/* Half-subscribed is a bad thing */
forwards_unsubscribe(forwards);
ao2_ref(forwards, -1);
return NULL;
}
} else {
/* Since endpoint subscriptions also subscribe to channels, in the case
* of all endpoint subscriptions, we only want messages for the endpoints.
* As such, we route those particular messages and then re-publish them
* on the app's topic.
*/
ast_assert(app->endpoint_router == NULL);
app->endpoint_router = stasis_message_router_create(ast_endpoint_topic_all_cached());
if (!app->endpoint_router) {
forwards_unsubscribe(forwards);
ao2_ref(forwards, -1);
return NULL;
}
ret |= stasis_message_router_add(app->endpoint_router,
ast_endpoint_state_type(), endpoint_state_cb, app);
ret |= stasis_message_router_add(app->endpoint_router,
ast_endpoint_contact_state_type(), endpoint_state_cb, app);
if (ret) {
ao2_ref(app->endpoint_router, -1);
app->endpoint_router = NULL;
ao2_ref(forwards, -1);
return NULL;
}
}
return forwards;
}