extern struct nf_conntrack_l4proto nf_conntrack_l4proto_tcp6;
extern struct nf_conntrack_l4proto nf_conntrack_l4proto_udp6;
extern struct nf_conntrack_l4proto nf_conntrack_l4proto_icmpv6;
+#ifdef CONFIG_NF_CT_PROTO_DCCP
+extern struct nf_conntrack_l4proto nf_conntrack_l4proto_dccp6;
+#endif
+#ifdef CONFIG_NF_CT_PROTO_SCTP
+extern struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp6;
+#endif
#include <linux/sysctl.h>
extern struct ctl_table nf_ct_ipv6_sysctl_table[];