SO_DOMAIN        2215 ext/sockets/sockets.c #ifdef SO_DOMAIN
SO_DOMAIN        2230 ext/sockets/sockets.c #ifdef SO_DOMAIN
SO_DOMAIN        2231 ext/sockets/sockets.c     if (getsockopt(socket, SOL_SOCKET, SO_DOMAIN, &type, &type_len) == 0) {