key_porttosaddr
key_porttosaddr(__UNCONST(dst), dport);
key_porttosaddr(&((saidx)->src), 0);
key_porttosaddr(&((saidx)->dst), 0);
key_porttosaddr(&sav->sah->saidx.src, sport->sadb_x_nat_t_port_port);
key_porttosaddr(&sav->sah->saidx.dst, dport->sadb_x_nat_t_port_port);
key_porttosaddr(src, sport->sadb_x_nat_t_port_port);
key_porttosaddr(dst, dport->sadb_x_nat_t_port_port);
static void key_porttosaddr (union sockaddr_union *, u_int16_t);