/* Raise RTSP session terminate event */
static apt_bool_t rtsp_client_session_terminate_raise(rtsp_client_t *client, rtsp_client_session_t *session)
{
rtsp_message_t *request;
rtsp_message_t *response;
/* cancel pending requests */
do {
request = apt_list_pop_front(session->pending_request_queue);
if(request) {
response = rtsp_response_create(
session->active_request,
RTSP_STATUS_CODE_INTERNAL_SERVER_ERROR,
RTSP_REASON_PHRASE_INTERNAL_SERVER_ERROR,
session->pool);
rtsp_client_session_response_process(client,session,request,response);
}
}
while(request);
if(session->term_state == TERMINATION_STATE_NONE) {
client->vtable->on_session_terminate_event(client,session);
}
else {
rtsp_client_session_terminate_respond(client,session);
}
return TRUE;
}
/* Process pending RTSP requests */
static apt_bool_t rtsp_client_session_pending_requests_process(rtsp_client_t *client, rtsp_client_session_t *session)
{
rtsp_message_t *request = apt_list_pop_front(session->pending_request_queue);
if(!request) {
/* pending queue is empty, no in-progress request */
return FALSE;
}
/* process pending request; get the next one, if current is failed */
do {
rtsp_message_t *response;
if(rtsp_client_session_request_process(client,session,request) == TRUE) {
return TRUE;
}
/* respond with error */
response = rtsp_response_create(
request,
RTSP_STATUS_CODE_INTERNAL_SERVER_ERROR,
RTSP_REASON_PHRASE_INTERNAL_SERVER_ERROR,
session->pool);
rtsp_client_session_response_process(client,session,request,response);
/* process the next pending request / if any */
request = apt_list_pop_front(session->pending_request_queue);
}
while(request);
/* no in-progress request */
return FALSE;
}
/* RTSP connection disconnected */
static apt_bool_t rtsp_client_on_disconnect(rtsp_client_t *client, rtsp_client_connection_t *rtsp_connection)
{
rtsp_client_session_t *session;
rtsp_message_t *request;
rtsp_message_t *response;
apr_size_t remaining_handles = 0;
apr_size_t cancelled_requests = 0;
apt_log(APT_LOG_MARK,APT_PRIO_INFO,"TCP Peer Disconnected %s", rtsp_connection->base->id);
apt_net_client_connection_close(client->task,rtsp_connection->base);
/* Cancel in-progreess requests */
do {
session = apt_list_pop_front(rtsp_connection->inprogress_request_queue);
if(session && session->active_request) {
request = session->active_request;
session->active_request = NULL;
cancelled_requests++;
response = rtsp_response_create(
request,
RTSP_STATUS_CODE_INTERNAL_SERVER_ERROR,
RTSP_REASON_PHRASE_INTERNAL_SERVER_ERROR,
session->pool);
rtsp_client_session_response_process(client,session,request,response);
}
}
while(session);
/* Walk through RTSP handles and raise termination event for them */
remaining_handles = apr_hash_count(rtsp_connection->handle_table);
if(remaining_handles) {
void *val;
apr_hash_index_t *it;
apt_log(APT_LOG_MARK,APT_PRIO_NOTICE,"Terminate Remaining RTSP Handles [%d]",remaining_handles);
it = apr_hash_first(rtsp_connection->base->pool,rtsp_connection->session_table);
for(; it; it = apr_hash_next(it)) {
apr_hash_this(it,NULL,NULL,&val);
session = val;
if(session) {
rtsp_client_session_terminate_raise(client,session);
}
}
remaining_handles = apr_hash_count(rtsp_connection->session_table);
}
if(!remaining_handles && !cancelled_requests) {
rtsp_client_connection_destroy(client,rtsp_connection);
}
return TRUE;
}
/** Return TRUE to proceed with the next message in the stream (if any) */
static apt_bool_t rtsp_client_message_handler(rtsp_client_connection_t *rtsp_connection, rtsp_message_t *message, apt_message_status_e status)
{
if(status != APT_MESSAGE_STATUS_COMPLETE) {
/* message is not completely parsed, nothing to do */
return TRUE;
}
/* process parsed message */
if(message->start_line.message_type == RTSP_MESSAGE_TYPE_RESPONSE) {
rtsp_message_t *request;
rtsp_client_session_t *session;
/* at first, pop in-progress request/session */
if(rtsp_client_request_pop(rtsp_connection,message,&request,&session) == FALSE) {
apt_log(RTSP_LOG_MARK,APT_PRIO_WARNING,"Unexpected RTSP Response Received CSeq:%"APR_SIZE_T_FMT,
message->header.cseq);
return TRUE;
}
/* next, process session response */
rtsp_client_session_response_process(rtsp_connection->client,session,request,message);
/* process session pending requests */
if(rtsp_client_session_pending_requests_process(rtsp_connection->client,session) == FALSE) {
/* no in-progress request, check the termination state now */
if(session->term_state != TERMINATION_STATE_NONE) {
if(session->term_state == TERMINATION_STATE_REQUESTED) {
rtsp_client_session_resources_teardown(rtsp_connection->client,session);
}
/* respond if no resources left */
if(apr_hash_count(session->resource_table) == 0) {
rtsp_client_session_terminate_respond(rtsp_connection->client,session);
if(apr_hash_count(rtsp_connection->handle_table) == 0) {
rtsp_client_connection_destroy(rtsp_connection);
/* return FALSE to indicate connection has been destroyed */
return FALSE;
}
}
}
}
}
else if(message->start_line.message_type == RTSP_MESSAGE_TYPE_REQUEST) {
rtsp_client_session_event_process(rtsp_connection->client,rtsp_connection,message);
}
return TRUE;
}
/* Process outgoing RTSP message */
static apt_bool_t rtsp_client_session_message_process(rtsp_client_t *client, rtsp_client_session_t *session, rtsp_message_t *message)
{
if(session->active_request) {
apt_log(APT_LOG_MARK,APT_PRIO_DEBUG,"Push RTSP Request to Pending Queue "APT_PTR_FMT,session);
apt_list_push_back(session->pending_request_queue,message,message->pool);
return TRUE;
}
if(rtsp_client_session_request_process(client,session,message) == FALSE) {
/* respond with error in case request cannot be processed */
rtsp_message_t *response = rtsp_response_create(
message,
RTSP_STATUS_CODE_INTERNAL_SERVER_ERROR,
RTSP_REASON_PHRASE_INTERNAL_SERVER_ERROR,
session->pool);
rtsp_client_session_response_process(client,session,message,response);
}
return TRUE;
}
