ip4_udp_register_listener (vlib_main_t * vm,
u16 dst_port, u32 next_node_index);
-void
-ip4_icmp_register_type (vlib_main_t * vm, icmp4_type_t type, u32 node_index);
-
u16 ip4_tcp_udp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
ip4_header_t * ip0);