IP_MULTICAST_LOOP  546 net/udp/udp_socket_libevent.cc       rv = setsockopt(socket_, IPPROTO_IP, IP_MULTICAST_LOOP,
IP_MULTICAST_LOOP  644 net/udp/udp_socket_win.cc         addr_family_ == AF_INET ? IP_MULTICAST_LOOP: IPV6_MULTICAST_LOOP;
IP_MULTICAST_LOOP  447 third_party/npapi/npspy/extern/nspr/md/_macos.h #define IP_MULTICAST_LOOP IP_MULTICAST_LOOP