chromium/third_party/blink/renderer/modules/direct_sockets/socket_connection.idl

dictionary SocketOpenInfo {
  ReadableStream readable;
  WritableStream writable;

  DOMString remoteAddress;
  unsigned short remotePort;

  DOMString localAddress;
  unsigned short localPort;
};

dictionary TCPSocketOpenInfo : SocketOpenInfo {};

dictionary UDPSocketOpenInfo : SocketOpenInfo {};

dictionary TCPServerSocketOpenInfo {
  ReadableStream readable;

  DOMString localAddress;
  unsigned short localPort;
};