static struct ast_multi_channel_blob *local_channel_optimization_blob(struct local_pvt *p,
struct ast_json *json_object)
{
struct ast_multi_channel_blob *payload;
RAII_VAR(struct ast_channel_snapshot *, local_one_snapshot, NULL, ao2_cleanup);
RAII_VAR(struct ast_channel_snapshot *, local_two_snapshot, NULL, ao2_cleanup);
local_one_snapshot = ast_channel_snapshot_get_latest(ast_channel_uniqueid(p->base.owner));
if (!local_one_snapshot) {
return NULL;
}
local_two_snapshot = ast_channel_snapshot_get_latest(ast_channel_uniqueid(p->base.chan));
if (!local_two_snapshot) {
return NULL;
}
payload = ast_multi_channel_blob_create(json_object);
if (!payload) {
return NULL;
}
ast_multi_channel_blob_add_channel(payload, "1", local_one_snapshot);
ast_multi_channel_blob_add_channel(payload, "2", local_two_snapshot);
return payload;
}
/*!
* \internal
* \brief Post the \ref ast_local_bridge_type \ref stasis message
* \since 12.0.0
*
* \param p local_pvt to raise the local bridge message
*
* \return Nothing
*/
static void publish_local_bridge_message(struct local_pvt *p)
{
RAII_VAR(struct ast_multi_channel_blob *, multi_blob, NULL, ao2_cleanup);
RAII_VAR(struct ast_json *, blob, NULL, ast_json_unref);
RAII_VAR(struct stasis_message *, msg, NULL, ao2_cleanup);
RAII_VAR(struct ast_channel_snapshot *, one_snapshot, NULL, ao2_cleanup);
RAII_VAR(struct ast_channel_snapshot *, two_snapshot, NULL, ao2_cleanup);
struct ast_channel *owner;
struct ast_channel *chan;
if (!ast_local_bridge_type()) {
return;
}
ast_unreal_lock_all(&p->base, &chan, &owner);
blob = ast_json_pack("{s: s, s: s, s: b}",
"context", p->context,
"exten", p->exten,
"can_optimize", !ast_test_flag(&p->base, AST_UNREAL_NO_OPTIMIZATION));
if (!blob) {
goto end;
}
multi_blob = ast_multi_channel_blob_create(blob);
if (!multi_blob) {
goto end;
}
one_snapshot = ast_channel_snapshot_get_latest(ast_channel_uniqueid(owner));
if (!one_snapshot) {
goto end;
}
two_snapshot = ast_channel_snapshot_get_latest(ast_channel_uniqueid(chan));
if (!two_snapshot) {
goto end;
}
ast_multi_channel_blob_add_channel(multi_blob, "1", one_snapshot);
ast_multi_channel_blob_add_channel(multi_blob, "2", two_snapshot);
msg = stasis_message_create(ast_local_bridge_type(), multi_blob);
if (!msg) {
goto end;
}
stasis_publish(ast_channel_topic(owner), msg);
end:
ast_channel_unlock(owner);
ast_channel_unref(owner);
ast_channel_unlock(chan);
ast_channel_unref(chan);
ao2_unlock(&p->base);
}
/*!
* \brief Finds the control object for a channel, filling the response with an
* error, if appropriate.
* \param[out] response Response to fill with an error if control is not found.
* \param channel_id ID of the channel to lookup.
* \return Channel control object.
* \return \c NULL if control object does not exist.
*/
static struct stasis_app_control *find_channel_control(
struct ast_ari_response *response,
const char *channel_id)
{
RAII_VAR(struct stasis_app_control *, control, NULL, ao2_cleanup);
ast_assert(response != NULL);
control = stasis_app_control_find_by_channel_id(channel_id);
if (control == NULL) {
/* Distinguish between 400 and 422 errors */
RAII_VAR(struct ast_channel_snapshot *, snapshot, NULL,
ao2_cleanup);
snapshot = ast_channel_snapshot_get_latest(channel_id);
if (snapshot == NULL) {
ast_log(LOG_DEBUG, "Couldn't find '%s'\n", channel_id);
ast_ari_response_error(response, 400, "Bad Request",
"Channel not found");
return NULL;
}
ast_log(LOG_DEBUG, "Found non-stasis '%s'\n", channel_id);
ast_ari_response_error(response, 422, "Unprocessable Entity",
"Channel not in Stasis application");
return NULL;
}
ao2_ref(control, +1);
return control;
}
/*!
* \internal
* \brief Peek at channel before it is pushed into bridge
* \since 13.2.0
*
* \param self Bridge to operate upon.
* \param bridge_channel Bridge channel to push.
* \param swap Bridge channel to swap places with if not NULL.
*
* \note On entry, self is already locked.
*
* \retval 0 on success.
* \retval -1 on failure. The channel should not be pushed.
*/
static int bridge_stasis_push_peek(struct ast_bridge *self, struct ast_bridge_channel *bridge_channel, struct ast_bridge_channel *swap)
{
struct stasis_app_control *swap_control;
struct ast_channel_snapshot *to_be_replaced;
if (!swap) {
goto done;
}
swap_control = stasis_app_control_find_by_channel(swap->chan);
if (!swap_control) {
ast_log(LOG_ERROR,"Failed to find stasis app control for swapped channel %s\n", ast_channel_name(swap->chan));
return -1;
}
to_be_replaced = ast_channel_snapshot_get_latest(ast_channel_uniqueid(swap->chan));
ast_debug(3, "Copying stasis app name %s from %s to %s\n", app_name(control_app(swap_control)),
ast_channel_name(swap->chan), ast_channel_name(bridge_channel->chan));
ast_channel_lock(bridge_channel->chan);
/* copy the app name from the swap channel */
app_set_replace_channel_app(bridge_channel->chan, app_name(control_app(swap_control)));
/* set the replace channel snapshot */
app_set_replace_channel_snapshot(bridge_channel->chan, to_be_replaced);
ast_channel_unlock(bridge_channel->chan);
ao2_ref(swap_control, -1);
ao2_cleanup(to_be_replaced);
done:
return ast_bridge_base_v_table.push_peek(self, bridge_channel, swap);
}
void ast_ari_channels_redirect(struct ast_variable *headers,
struct ast_ari_channels_redirect_args *args,
struct ast_ari_response *response)
{
RAII_VAR(struct stasis_app_control *, control, NULL, ao2_cleanup);
RAII_VAR(struct ast_channel_snapshot *, chan_snapshot, NULL, ao2_cleanup);
char *tech;
char *resource;
int tech_len;
control = find_control(response, args->channel_id);
if (!control) {
return;
}
if (ast_strlen_zero(args->endpoint)) {
ast_ari_response_error(response, 400, "Not Found",
"Required parameter 'endpoint' not provided.");
return;
}
tech = ast_strdupa(args->endpoint);
if (!(resource = strchr(tech, '/')) || !(tech_len = resource - tech)) {
ast_ari_response_error(response, 422, "Unprocessable Entity",
"Endpoint parameter '%s' does not contain tech/resource", args->endpoint);
return;
}
*resource++ = '\0';
if (ast_strlen_zero(resource)) {
ast_ari_response_error(response, 422, "Unprocessable Entity",
"No resource provided in endpoint parameter '%s'", args->endpoint);
return;
}
chan_snapshot = ast_channel_snapshot_get_latest(args->channel_id);
if (!chan_snapshot) {
ast_ari_response_error(response, 500, "Internal Server Error",
"Unable to find channel snapshot for '%s'", args->channel_id);
return;
}
if (strncasecmp(chan_snapshot->type, tech, tech_len)) {
ast_ari_response_error(response, 422, "Unprocessable Entity",
"Endpoint technology '%s' does not match channel technology '%s'",
tech, chan_snapshot->type);
return;
}
if (stasis_app_control_redirect(control, resource)) {
ast_ari_response_error(response, 500, "Internal Server Error",
"Failed to redirect channel");
return;
}
ast_ari_response_no_content(response);
}
/*! \internal
* \brief Publish the chanspy message over Stasis-Core
* \param snoop The snoop structure
* \start start If non-zero, the spying is starting. Otherwise, the spyer is
* finishing
*/
static void publish_chanspy_message(struct stasis_app_snoop *snoop, int start)
{
RAII_VAR(struct ast_json *, blob, NULL, ast_json_unref);
RAII_VAR(struct ast_multi_channel_blob *, payload, NULL, ao2_cleanup);
RAII_VAR(struct stasis_message *, message, NULL, ao2_cleanup);
RAII_VAR(struct ast_channel_snapshot *, snoop_snapshot, NULL, ao2_cleanup);
RAII_VAR(struct ast_channel_snapshot *, spyee_snapshot, NULL, ao2_cleanup);
struct stasis_message_type *type = start ? ast_channel_chanspy_start_type(): ast_channel_chanspy_stop_type();
blob = ast_json_null();
if (!blob || !type) {
return;
}
payload = ast_multi_channel_blob_create(blob);
if (!payload) {
return;
}
snoop_snapshot = ast_channel_snapshot_get_latest(ast_channel_uniqueid(snoop->chan));
if (!snoop_snapshot) {
return;
}
ast_multi_channel_blob_add_channel(payload, "spyer_channel", snoop_snapshot);
spyee_snapshot = ast_channel_snapshot_get_latest(snoop->uniqueid);
if (spyee_snapshot) {
ast_multi_channel_blob_add_channel(payload, "spyee_channel", spyee_snapshot);
}
message = stasis_message_create(type, payload);
if (!message) {
return;
}
stasis_publish(ast_channel_topic(snoop->chan), message);
}
/*! \brief Callback for \ref ast_unreal_pvt_callbacks \ref optimization_started_cb */
static void local_optimization_started_cb(struct ast_unreal_pvt *base, struct ast_channel *source,
enum ast_unreal_channel_indicator dest, unsigned int id)
{
RAII_VAR(struct ast_json *, json_object, ast_json_null(), ast_json_unref);
RAII_VAR(struct ast_multi_channel_blob *, payload, NULL, ao2_cleanup);
RAII_VAR(struct stasis_message *, msg, NULL, ao2_cleanup);
struct local_pvt *p = (struct local_pvt *)base;
if (!ast_local_optimization_begin_type()) {
return;
}
json_object = ast_json_pack("{s: i, s: i}",
"dest", dest, "id", id);
if (!json_object) {
return;
}
payload = local_channel_optimization_blob(p, json_object);
if (!payload) {
return;
}
if (source) {
RAII_VAR(struct ast_channel_snapshot *, source_snapshot, NULL, ao2_cleanup);
source_snapshot = ast_channel_snapshot_get_latest(ast_channel_uniqueid(source));
if (!source_snapshot) {
return;
}
ast_multi_channel_blob_add_channel(payload, "source", source_snapshot);
}
msg = stasis_message_create(ast_local_optimization_begin_type(), payload);
if (!msg) {
return;
}
stasis_publish(ast_channel_topic(p->base.owner), msg);
}
int ast_do_pickup(struct ast_channel *chan, struct ast_channel *target)
{
struct ast_party_connected_line connected_caller;
struct ast_datastore *ds_pickup;
const char *chan_name;/*!< A masquerade changes channel names. */
const char *target_name;/*!< A masquerade changes channel names. */
int res = -1;
RAII_VAR(struct ast_channel_snapshot *, chan_snapshot, NULL, ao2_cleanup);
RAII_VAR(struct ast_channel_snapshot *, target_snapshot, NULL, ao2_cleanup);
target_name = ast_strdupa(ast_channel_name(target));
ast_debug(1, "Call pickup on '%s' by '%s'\n", target_name, ast_channel_name(chan));
/* Mark the target to block any call pickup race. */
ds_pickup = ast_datastore_alloc(&pickup_active, NULL);
if (!ds_pickup) {
ast_log(LOG_WARNING,
"Unable to create channel datastore on '%s' for call pickup\n", target_name);
return -1;
}
ast_channel_datastore_add(target, ds_pickup);
ast_party_connected_line_init(&connected_caller);
ast_party_connected_line_copy(&connected_caller, ast_channel_connected(target));
ast_channel_unlock(target);/* The pickup race is avoided so we do not need the lock anymore. */
/* Reset any earlier private connected id representation */
ast_party_id_reset(&connected_caller.priv);
connected_caller.source = AST_CONNECTED_LINE_UPDATE_SOURCE_ANSWER;
if (ast_channel_connected_line_sub(NULL, chan, &connected_caller, 0) &&
ast_channel_connected_line_macro(NULL, chan, &connected_caller, 0, 0)) {
ast_channel_update_connected_line(chan, &connected_caller, NULL);
}
ast_party_connected_line_free(&connected_caller);
ast_channel_lock(chan);
chan_name = ast_strdupa(ast_channel_name(chan));
ast_connected_line_copy_from_caller(&connected_caller, ast_channel_caller(chan));
ast_channel_unlock(chan);
connected_caller.source = AST_CONNECTED_LINE_UPDATE_SOURCE_ANSWER;
if (ast_answer(chan)) {
ast_log(LOG_WARNING, "Unable to answer '%s'\n", chan_name);
goto pickup_failed;
}
if (ast_queue_control(chan, AST_CONTROL_ANSWER)) {
ast_log(LOG_WARNING, "Unable to queue answer on '%s'\n", chan_name);
goto pickup_failed;
}
ast_channel_queue_connected_line_update(chan, &connected_caller, NULL);
/* setting the HANGUPCAUSE so the ringing channel knows this call was not a missed call */
ast_channel_hangupcause_set(chan, AST_CAUSE_ANSWERED_ELSEWHERE);
ast_channel_lock(chan);
chan_snapshot = ast_channel_snapshot_create(chan);
ast_channel_unlock(chan);
if (!chan_snapshot) {
goto pickup_failed;
}
target_snapshot = ast_channel_snapshot_get_latest(ast_channel_uniqueid(target));
if (!target_snapshot) {
goto pickup_failed;
}
if (ast_channel_move(target, chan)) {
ast_log(LOG_WARNING, "Unable to complete call pickup of '%s' with '%s'\n",
chan_name, target_name);
goto pickup_failed;
}
/* target points to the channel that did the pickup at this point, so use that channel's topic instead of chan */
send_call_pickup_stasis_message(target, chan_snapshot, target_snapshot);
res = 0;
pickup_failed:
ast_channel_lock(target);
if (!ast_channel_datastore_remove(target, ds_pickup)) {
ast_datastore_free(ds_pickup);
}
ast_party_connected_line_free(&connected_caller);
return res;
}
