ip_check_mc       218 include/linux/igmp.h extern int ip_check_mc(struct in_device *dev, __be32 mc_addr, __be32 src_addr, u16 proto);
ip_check_mc      2168 net/ipv4/route.c 			int our = ip_check_mc(in_dev, daddr, saddr,
ip_check_mc      2225 net/ipv4/route.c 		if (!ip_check_mc(in_dev, oldflp->fl4_dst, oldflp->fl4_src,