GetSockOpt        220 native_client_sdk/src/libraries/nacl_io/socket/socket_node.cc Error SocketNode::GetSockOpt(int lvl,
GetSockOpt        317 native_client_sdk/src/libraries/nacl_io/socket/tcp_node.cc Error TcpNode::GetSockOpt(int lvl, int optname, void* optval, socklen_t* len) {