void tcp_send_syn (tcp_connection_t * tc);
void tcp_send_synack (tcp_connection_t * tc);
void tcp_send_fin (tcp_connection_t * tc);
-void tcp_init_mss (tcp_connection_t * tc);
void tcp_update_burst_snd_vars (tcp_connection_t * tc);
void tcp_update_rto (tcp_connection_t * tc);
void tcp_flush_frame_to_output (tcp_worker_ctx_t * wrk, u8 is_ip4);