if_set             89 netinet6/ip6_mroute.h typedef	struct if_set {
if_set            120 netinet6/ip6_mroute.h 	struct if_set	mf6cc_ifset;	/* set of forwarding ifs */
if_set            235 netinet6/ip6_mroute.h 	struct if_set	 mf6c_ifset;		/* set of outgoing IFs */