dictionary SocketOpenInfo {
  ReadableStream readable;
  WritableStream writable;

  DOMString remoteAddress;
  unsigned short remotePort;

  DOMString localAddress;
  unsigned short localPort;
};

dictionary TCPSocketOpenInfo : SocketOpenInfo {};

dictionary UDPSocketOpenInfo : SocketOpenInfo {
  [RuntimeEnabled=MulticastInDirectSockets] MulticastController multicastController;
};

dictionary TCPServerSocketOpenInfo {
  ReadableStream readable;

  DOMString localAddress;
  unsigned short localPort;
};