ip_mreqn           62 include/linux/igmp.h 	struct ip_mreqn		multi;
ip_mreqn          114 include/linux/igmp.h extern int ip_mc_join_group(struct sock *sk, struct ip_mreqn *imr);
ip_mreqn          115 include/linux/igmp.h extern int ip_mc_leave_group(struct sock *sk, struct ip_mreqn *imr);