struct ast_endpoint_snapshot *ast_endpoint_latest_snapshot(const char *tech,
const char *name)
{
RAII_VAR(char *, id, NULL, ast_free);
RAII_VAR(struct stasis_message *, msg, NULL, ao2_cleanup);
struct ast_endpoint_snapshot *snapshot;
if (ast_strlen_zero(name)) {
ast_asprintf(&id, "%s", tech);
} else {
ast_asprintf(&id, "%s/%s", tech, name);
}
if (!id) {
return NULL;
}
ast_tech_to_upper(id);
msg = stasis_cache_get(ast_endpoint_cache(),
ast_endpoint_snapshot_type(), id);
if (!msg) {
return NULL;
}
snapshot = stasis_message_data(msg);
ast_assert(snapshot != NULL);
ao2_ref(snapshot, +1);
return snapshot;
}
static void sub_endpoint_update_handler(void *data,
struct stasis_subscription *sub,
struct stasis_message *message)
{
RAII_VAR(struct ast_json *, json, NULL, ast_json_unref);
struct stasis_app *app = data;
struct stasis_cache_update *update;
struct ast_endpoint_snapshot *new_snapshot;
struct ast_endpoint_snapshot *old_snapshot;
const struct timeval *tv;
ast_assert(stasis_message_type(message) == stasis_cache_update_type());
update = stasis_message_data(message);
ast_assert(update->type == ast_endpoint_snapshot_type());
new_snapshot = stasis_message_data(update->new_snapshot);
old_snapshot = stasis_message_data(update->old_snapshot);
if (new_snapshot) {
tv = stasis_message_timestamp(update->new_snapshot);
json = simple_endpoint_event("EndpointStateChange", new_snapshot, tv);
if (!json) {
return;
}
app_send(app, json);
}
if (!new_snapshot && old_snapshot) {
unsubscribe(app, "endpoint", old_snapshot->id, 1);
}
}
/*!
* \brief Callback extract a unique identity from a snapshot message.
*
* This identity is unique to the underlying object of the snapshot, such as the
* UniqueId field of a channel.
*
* \param message Message to extract id from.
* \return String representing the snapshot's id.
* \return \c NULL if the message_type of the message isn't a handled snapshot.
* \since 12
*/
static const char *endpoint_snapshot_get_id(struct stasis_message *message)
{
struct ast_endpoint_snapshot *snapshot;
if (ast_endpoint_snapshot_type() != stasis_message_type(message)) {
return NULL;
}
snapshot = stasis_message_data(message);
return snapshot->id;
}
void ast_ari_endpoints_list(struct ast_variable *headers,
struct ast_ari_endpoints_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;
cache = ast_endpoint_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_endpoint_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;
}
i = ao2_iterator_init(snapshots, 0);
while ((obj = ao2_iterator_next(&i))) {
RAII_VAR(struct stasis_message *, msg, obj, ao2_cleanup);
struct ast_endpoint_snapshot *snapshot = stasis_message_data(msg);
struct ast_json *json_endpoint = ast_endpoint_snapshot_to_json(snapshot, stasis_app_get_sanitizer());
int r;
if (!json_endpoint) {
return;
}
r = ast_json_array_append(
json, json_endpoint);
if (r != 0) {
ast_ari_response_alloc_failed(response);
return;
}
}
ao2_iterator_destroy(&i);
ast_ari_response_ok(response, ast_json_ref(json));
}
static int unload_module(void)
{
struct ao2_container *endpoints;
endpoints = stasis_cache_dump(ast_endpoint_cache(), ast_endpoint_snapshot_type());
if (endpoints) {
ao2_callback(endpoints, OBJ_MULTIPLE | OBJ_NODATA | OBJ_NOLOCK, dump_cache_unload, NULL);
ao2_ref(endpoints, -1);
}
stasis_message_router_unsubscribe_and_join(router);
router = NULL;
return 0;
}
static void cache_update_cb(void *data, struct stasis_subscription *sub,
struct stasis_message *message)
{
struct stasis_cache_update *update = stasis_message_data(message);
struct ast_endpoint_snapshot *old_snapshot;
struct ast_endpoint_snapshot *new_snapshot;
if (ast_endpoint_snapshot_type() != update->type) {
return;
}
old_snapshot = stasis_message_data(update->old_snapshot);
new_snapshot = stasis_message_data(update->new_snapshot);
handle_endpoint_update(old_snapshot, new_snapshot);
}
static int load_module(void)
{
struct ao2_container *endpoints;
router = stasis_message_router_create(ast_endpoint_topic_all_cached());
if (!router) {
return AST_MODULE_LOAD_FAILURE;
}
stasis_message_router_add(router, stasis_cache_update_type(), cache_update_cb, NULL);
endpoints = stasis_cache_dump(ast_endpoint_cache(), ast_endpoint_snapshot_type());
if (endpoints) {
ao2_callback(endpoints, OBJ_MULTIPLE | OBJ_NODATA | OBJ_NOLOCK, dump_cache_load, NULL);
ao2_ref(endpoints, -1);
}
return AST_MODULE_LOAD_SUCCESS;
}
/*! \brief Message matcher looking for cache update messages */
static int cache_update(struct stasis_message *msg, const void *data) {
struct stasis_cache_update *update;
struct ast_endpoint_snapshot *snapshot;
const char *name = data;
if (stasis_cache_update_type() != stasis_message_type(msg)) {
return 0;
}
update = stasis_message_data(msg);
if (ast_endpoint_snapshot_type() != update->type) {
return 0;
}
snapshot = stasis_message_data(update->old_snapshot);
if (!snapshot) {
snapshot = stasis_message_data(update->new_snapshot);
}
return 0 == strcmp(name, snapshot->resource);
}
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;
}
