PFLOWNL_ADDR_IP6
{ .type = PFLOWNL_ADDR_IP6, .off = _OUT(in6.sin6_addr), .cb = snl_attr_get_in6_addr },
snl_add_msg_attr_ip6(nw, PFLOWNL_ADDR_IP6, &in6->sin6_addr);
nlattr_add_in6_addr(nw, PFLOWNL_ADDR_IP6, &in6->sin6_addr);
{ .type = PFLOWNL_ADDR_IP6, .off = _OUT(in6.sin6_addr), .cb = nlattr_get_in6_addr },