IP_MULTICAST_LOOP 105 arch/um/drivers/umcast_user.c if (setsockopt(fd, SOL_IP, IP_MULTICAST_LOOP, IP_MULTICAST_LOOP 619 net/ipv4/ip_sockglue.c case IP_MULTICAST_LOOP: IP_MULTICAST_LOOP 801 net/ipv4/ip_sockglue.c case IP_MULTICAST_LOOP: IP_MULTICAST_LOOP 1431 net/ipv4/ip_sockglue.c case IP_MULTICAST_LOOP: IP_MULTICAST_LOOP 404 tools/testing/selftests/networking/timestamping/timestamping.c if (setsockopt(sock, IPPROTO_IP, IP_MULTICAST_LOOP,