IPFW_KEY_SWAP_PORTS
#define IPFW_KEY_SWAP_ALL (IPFW_KEY_SWAP_ADDRS | IPFW_KEY_SWAP_PORTS)
key->swap |= IPFW_KEY_SWAP_PORTS;
key->swap |= IPFW_KEY_SWAP_PORTS;
if (saddr == daddr && (key->swap & IPFW_KEY_SWAP_PORTS))
if (key->swap & IPFW_KEY_SWAP_PORTS) {