extern const struct proto_ops inet6_stream_ops;
extern const struct proto_ops inet6_dgram_ops;
+struct group_source_req;
+struct group_filter;
+
extern int ip6_mc_source(int add, int omode, struct sock *sk,
struct group_source_req *pgsr);
extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);