KEY_LOOKUP_SA
return KEY_LOOKUP_SA(&dst, IPPROTO_TCP, htonl(TCP_SIG_SPI), 0, 0);
sav = KEY_LOOKUP_SA(&dst_address, sproto, spi, sport, dport);
sav = KEY_LOOKUP_SA((const union sockaddr_union *)sa,
sav = KEY_LOOKUP_SA((const union sockaddr_union *)sa,
sav = KEY_LOOKUP_SA((const union sockaddr_union *)sa,
sav = KEY_LOOKUP_SA((const union sockaddr_union *)sa,