UDP sockets implementation for windows.

net/udp/udp_socket.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_UDP_UDP_SOCKET_H_
 #define NET_UDP_UDP_SOCKET_H_
 #pragma once
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
 #include "net/udp/udp_socket_win.h"
 #elif defined(OS_POSIX)
 #include "net/udp/udp_socket_libevent.h"
 #endif
 
 namespace net {
 
-// A client socket that uses UDP as the transport layer.
+// UDPSocket
+// Accessor API for a UDP socket in either client or server form.
+//
+// Client form:
+// In this case, we're connecting to a specific server, so the client will
+// usually use:
+//       Connect(address)    // Connect to a UDP server
+//       Read/Write          // Reads/Writes all go to a single destination
+//
+// Server form:
+// In this case, we want to read/write to many clients which are connecting
+// to this server.  First the server 'binds' to an addres, then we read from
+// clients and write responses to them.
+// Example:
+//       Bind(address/port)  // Binds to port for reading from clients
+//       RecvFrom/SendTo     // Each read can come from a different client
+//                           // Writes need to be directed to a specific
+//                           // address.
 #if defined(OS_WIN)
 typedef UDPSocketWin UDPSocket;
 #elif defined(OS_POSIX)
 typedef UDPSocketLibevent UDPSocket;
 #endif
 
 }  // namespace net
 
 #endif  // NET_UDP_UDP_SOCKET_H_