NPF_CONNKEY_ALEN
bk = npf_conn_getbackkey(con, NPF_CONNKEY_ALEN(fw));
alen = NPF_CONNKEY_ALEN(fw);
bk = npf_conn_getbackkey(con, NPF_CONNKEY_ALEN(fw));
if (NPF_CONNKEY_ALEN(fw) != alen || NPF_CONNKEY_ALEN(bk) != alen) {
const npf_connkey_t *bk = npf_conn_getbackkey(con, NPF_CONNKEY_ALEN(fw));
#define NPF_CONNKEY_LEN(key) (8 + (NPF_CONNKEY_ALEN(key) * 2))
const unsigned alen = NPF_CONNKEY_ALEN(key);
const unsigned alen = NPF_CONNKEY_ALEN(skey);