Allow p2p UDP packages to set DSCP

net/udp/datagram_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_DATAGRAM_SOCKET_H_
 #define NET_UDP_DATAGRAM_SOCKET_H_
 
 #include "net/base/net_export.h"
 
 namespace net {
 
 class BoundNetLog;
 class IPEndPoint;
 
+// TODO(hubbe): Move this to net_util.h and implement SetToS
+// for tcp sockets as well.
+enum DiffServCodePoint {
+  DSCP_CS0  = 0,   // The default
+  DSCP_CS1  = 8,   // Bulk/background traffic
+  DSCP_AF11 = 10,
+  DSCP_AF12 = 12,
+  DSCP_AF13 = 14,
+  DSCP_CS2  = 16,
+  DSCP_AF21 = 18,
+  DSCP_AF22 = 20,
+  DSCP_AF23 = 22,
+  DSCP_CS3  = 24,
+  DSCP_AF31 = 26,
+  DSCP_AF32 = 28,
+  DSCP_AF33 = 30,
+  DSCP_CS4  = 32,
+  DSCP_AF41 = 34,  // Video
+  DSCP_AF42 = 36,  // Video
+  DSCP_AF43 = 38,  // Video
+  DSCP_CS5  = 40,  // Video
+  DSCP_EF   = 46,  // Voice
+  DSCP_CS6  = 48,  // Voice
+  DSCP_CS7  = 56,  // Control messages
+};
+
+
 // A datagram socket is an interface to a protocol which exchanges
 // datagrams, like UDP.
 class NET_EXPORT_PRIVATE DatagramSocket {
  public:
   // Type of source port binding to use.
   enum BindType {
     RANDOM_BIND,
     DEFAULT_BIND,
   };
 
   virtual ~DatagramSocket() {}
 
   // Close the socket.
   virtual void Close() = 0;
 
   // Copy the remote udp address into |address| and return a network error code.
   virtual int GetPeerAddress(IPEndPoint* address) const = 0;
 
   // Copy the local udp address into |address| and return a network error code.
   // (similar to getsockname)
   virtual int GetLocalAddress(IPEndPoint* address) const = 0;
 
   // Gets the NetLog for this socket.
   virtual const BoundNetLog& NetLog() const = 0;
 };
 
 }  // namespace net
 
 #endif  // NET_UDP_DATAGRAM_SOCKET_H_