PF_RT_MAX_SRC_CONN
snl_add_msg_attr_u32(nw, PF_RT_MAX_SRC_CONN, r->max_src_conn);
{ .type = PF_RT_MAX_SRC_CONN, .off = _OUT(r.max_src_conn), .cb = snl_attr_get_uint32 },
{ .type = PF_RT_MAX_SRC_CONN, .off = _OUT(max_src_conn), .cb = nlattr_get_uint32 },
nlattr_add_u32(nw, PF_RT_MAX_SRC_CONN, rule->max_src_conn);