+ int ret;
+
+ ret = nf_ct_l4proto_register(&dccp_proto4);
+ if (ret < 0)
+ goto out_dccp4;
+
+ ret = nf_ct_l4proto_register(&dccp_proto6);
+ if (ret < 0)
+ goto out_dccp6;
+
+ ret = register_pernet_subsys(&dccp_net_ops);
+ if (ret < 0)
+ goto out_pernet;
+
+ return 0;
+out_pernet:
+ nf_ct_l4proto_unregister(&dccp_proto6);
+out_dccp6:
+ nf_ct_l4proto_unregister(&dccp_proto4);
+out_dccp4:
+ return ret;