+ udp_header_t * udp0 = ip4_next_header (ip0);
+ m_key0.port = clib_net_to_host_u16 (udp0->dst_port);
+ m_key0.protocol = ip_proto_to_snat_proto (ip0->protocol);
+ kv0.key = m_key0.as_u64;
+ if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv0, &value0))
+ next0 = NAT44_CLASSIFY_NEXT_OUT2IN;