IPV6_DEFAULT_MCASTHOPS 207 net/ipv6/af_inet6.c np->mcast_hops = IPV6_DEFAULT_MCASTHOPS; IPV6_DEFAULT_MCASTHOPS 568 net/ipv6/ipv6_sockglue.c np->mcast_hops = (val == -1 ? IPV6_DEFAULT_MCASTHOPS : val);