u32 sctp_push_header (transport_connection_t * tconn, vlib_buffer_t * b);
void sctp_send_init (sctp_connection_t * sctp_conn);
void sctp_send_shutdown (sctp_connection_t * sctp_conn);
-void sctp_send_shutdown_ack (sctp_connection_t * sctp_conn);
+void sctp_send_shutdown_ack (sctp_connection_t * sctp_conn,
+ vlib_buffer_t * b);
void sctp_send_shutdown_complete (sctp_connection_t * sctp_conn);
void sctp_send_heartbeat (sctp_connection_t * sctp_conn);
void sctp_flush_frame_to_output (vlib_main_t * vm, u8 thread_index,