PF_NL_DST_PORT
{ .type = PF_NL_DST_PORT, .off = _OUT(dport), .cb = snl_attr_get_uint16 },
snl_add_msg_attr_u16(&nw, PF_NL_DST_PORT, k->dport);
{ .type = PF_NL_DST_PORT, .off = _OUT(dport), .cb = nlattr_get_uint16 },
nlattr_add_u16(nw, PF_NL_DST_PORT, attrs.rdport);