void rtr_fsm_start(struct rtr_socket *rtr_socket) {
rtr_socket->state = RTR_CONNECTING;
install_sig_handler();
while(1) {
if(rtr_socket->state == RTR_CONNECTING) {
RTR_DBG1("State: RTR_CONNECTING");
//old pfx_record could exists in the pfx_table, check if they are too old and must be removed
rtr_purge_outdated_records(rtr_socket);
if(tr_open(rtr_socket->tr_socket) == TR_ERROR) {
rtr_change_socket_state(rtr_socket, RTR_ERROR_TRANSPORT);
}
else if(rtr_socket->request_session_id) {
//change to state RESET, if socket dont has a session_id
rtr_change_socket_state(rtr_socket, RTR_RESET);
}
else {
//if we already have a session_id, send a serial query and start to sync
if(rtr_send_serial_query(rtr_socket) == RTR_SUCCESS)
rtr_change_socket_state(rtr_socket, RTR_SYNC);
else
rtr_change_socket_state(rtr_socket, RTR_ERROR_FATAL);
}
}
else if(rtr_socket->state == RTR_RESET) {
RTR_DBG1("State: RTR_RESET");
if (rtr_send_reset_query(rtr_socket) == 0) {
RTR_DBG1("rtr_start: reset pdu sent");
rtr_change_socket_state(rtr_socket, RTR_SYNC); //send reset query after connection established
}
}
else if(rtr_socket->state == RTR_SYNC) {
RTR_DBG1("State: RTR_SYNC");
if(rtr_sync(rtr_socket) == 0)
rtr_change_socket_state(rtr_socket, RTR_ESTABLISHED); //send reset query after connection established
}
else if(rtr_socket->state == RTR_ESTABLISHED) {
RTR_DBG1("State: RTR_ESTABLISHED");
if(rtr_wait_for_sync(rtr_socket) == RTR_SUCCESS) { //blocks till cache_timeout is expired or PDU was received
//serial query senden
if(rtr_send_serial_query(rtr_socket) == RTR_SUCCESS)
rtr_change_socket_state(rtr_socket, RTR_SYNC);
}
}
else if(rtr_socket->state == RTR_ERROR_NO_DATA_AVAIL) {
RTR_DBG1("State: RTR_ERROR_NO_DATA_AVAIL");
rtr_socket->request_session_id = true;
rtr_socket->serial_number = 0;
rtr_change_socket_state(rtr_socket, RTR_RESET);
sleep(ERR_TIMEOUT);
rtr_purge_outdated_records(rtr_socket);
}
else if(rtr_socket->state == RTR_ERROR_NO_INCR_UPDATE_AVAIL) {
RTR_DBG1("State: RTR_ERROR_NO_INCR_UPDATE_AVAIL");
rtr_socket->request_session_id = true;
rtr_socket->serial_number = 0;
rtr_change_socket_state(rtr_socket, RTR_RESET);
rtr_purge_outdated_records(rtr_socket);
}
else if(rtr_socket->state == RTR_ERROR_TRANSPORT) {
RTR_DBG1("State: RTR_ERROR_TRANSPORT");
tr_close(rtr_socket->tr_socket);
rtr_change_socket_state(rtr_socket, RTR_CONNECTING);
sleep(ERR_TIMEOUT);
}
else if(rtr_socket->state == RTR_ERROR_FATAL) {
RTR_DBG1("State: RTR_ERROR_FATAL");
tr_close(rtr_socket->tr_socket);
rtr_change_socket_state(rtr_socket, RTR_CONNECTING);
sleep(ERR_TIMEOUT);
}
else if(rtr_socket->state == RTR_SHUTDOWN) {
RTR_DBG1("State: RTR_SHUTDOWN");
tr_close(rtr_socket->tr_socket);
rtr_socket->request_session_id = true;
rtr_socket->serial_number = 0;
rtr_socket->last_update = 0;
pfx_table_src_remove(rtr_socket->pfx_table, rtr_socket);
pthread_exit(NULL);
}
}
}
/* WARNING: This Function has cancelable sections*/
void *rtr_fsm_start(struct rtr_socket *rtr_socket)
{
if (rtr_socket->state == RTR_SHUTDOWN)
return NULL;
// We don't care about the old state, but POSIX demands a non null value for setcancelstate
int oldcancelstate;
pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &oldcancelstate);
rtr_socket->state = RTR_CONNECTING;
while(1) {
if(rtr_socket->state == RTR_CONNECTING) {
RTR_DBG1("State: RTR_CONNECTING");
rtr_socket->has_received_pdus = false;
//old pfx_record could exists in the pfx_table, check if they are too old and must be removed
//old key_entry could exists in the spki_table, check if they are too old and must be removed
rtr_purge_outdated_records(rtr_socket);
if(tr_open(rtr_socket->tr_socket) == TR_ERROR) {
rtr_change_socket_state(rtr_socket, RTR_ERROR_TRANSPORT);
} else if(rtr_socket->request_session_id) {
//change to state RESET, if socket dont has a session_id
rtr_change_socket_state(rtr_socket, RTR_RESET);
} else {
//if we already have a session_id, send a serial query and start to sync
if(rtr_send_serial_query(rtr_socket) == RTR_SUCCESS)
rtr_change_socket_state(rtr_socket, RTR_SYNC);
else
rtr_change_socket_state(rtr_socket, RTR_ERROR_FATAL);
}
}
else if(rtr_socket->state == RTR_RESET) {
RTR_DBG1("State: RTR_RESET");
if (rtr_send_reset_query(rtr_socket) == RTR_SUCCESS) {
RTR_DBG1("rtr_start: reset pdu sent");
rtr_change_socket_state(rtr_socket, RTR_SYNC); //start to sync after connection is established
}
}
else if(rtr_socket->state == RTR_SYNC) {
RTR_DBG1("State: RTR_SYNC");
if(rtr_sync(rtr_socket) == RTR_SUCCESS)
rtr_change_socket_state(rtr_socket, RTR_ESTABLISHED); //wait for next sync after first successful sync
}
else if(rtr_socket->state == RTR_ESTABLISHED) {
RTR_DBG1("State: RTR_ESTABLISHED");
// Allow thread cancellation for recv code path only.
// This should be enough since we spend most of the time blocking on recv
pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &oldcancelstate);
int ret = rtr_wait_for_sync(rtr_socket); //blocks till expire_interval is expired or PDU was received
pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &oldcancelstate);
if(ret == RTR_SUCCESS) { //send serial query
if(rtr_send_serial_query(rtr_socket) == RTR_SUCCESS)
rtr_change_socket_state(rtr_socket, RTR_SYNC);
}
}
else if(rtr_socket->state == RTR_FAST_RECONNECT){
RTR_DBG1("State: RTR_FAST_RECONNECT");
tr_close(rtr_socket->tr_socket);
rtr_change_socket_state(rtr_socket, RTR_CONNECTING);
}
else if(rtr_socket->state == RTR_ERROR_NO_DATA_AVAIL) {
RTR_DBG1("State: RTR_ERROR_NO_DATA_AVAIL");
rtr_socket->request_session_id = true;
rtr_socket->serial_number = 0;
rtr_change_socket_state(rtr_socket, RTR_RESET);
sleep(rtr_socket->retry_interval);
rtr_purge_outdated_records(rtr_socket);
}
else if(rtr_socket->state == RTR_ERROR_NO_INCR_UPDATE_AVAIL) {
RTR_DBG1("State: RTR_ERROR_NO_INCR_UPDATE_AVAIL");
rtr_socket->request_session_id = true;
rtr_socket->serial_number = 0;
rtr_change_socket_state(rtr_socket, RTR_RESET);
rtr_purge_outdated_records(rtr_socket);
}
else if(rtr_socket->state == RTR_ERROR_TRANSPORT) {
RTR_DBG1("State: RTR_ERROR_TRANSPORT");
tr_close(rtr_socket->tr_socket);
rtr_change_socket_state(rtr_socket, RTR_CONNECTING);
RTR_DBG("Waiting %u", rtr_socket->retry_interval);
sleep(rtr_socket->retry_interval);
}
else if(rtr_socket->state == RTR_ERROR_FATAL) {
RTR_DBG1("State: RTR_ERROR_FATAL");
tr_close(rtr_socket->tr_socket);
rtr_change_socket_state(rtr_socket, RTR_CONNECTING);
RTR_DBG("Waiting %u", rtr_socket->retry_interval);
sleep(rtr_socket->retry_interval);
}
else if(rtr_socket->state == RTR_SHUTDOWN) {
RTR_DBG1("State: RTR_SHUTDOWN");
pthread_exit(NULL);
}
}
}
