syncookie_secret 19 net/ipv4/syncookies.c static siphash_key_t syncookie_secret[2] __read_mostly; syncookie_secret 51 net/ipv4/syncookies.c net_get_random_once(syncookie_secret, sizeof(syncookie_secret)); syncookie_secret 54 net/ipv4/syncookies.c count, &syncookie_secret[c]);