Support port range for IPC P2P UDP sockets.

content/common/p2p_socket_type.h

 // Copyright 2014 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.
 
 // This file defines some basic types used by the P2P-related IPC
 // messages.
 
 #ifndef CONTENT_COMMON_P2P_SOCKET_TYPE_H_
 #define CONTENT_COMMON_P2P_SOCKET_TYPE_H_
 
@@ skipping 52 matching lines @@
 
   uint64_t packet_id = 0;
   // rtc_packet_id is a sequential packet counter written in the RTP header and
   // used by RTP receivers to ACK received packets. It is sent back with a
   // corresponding send time to WebRTC in the browser process so that it can be
   // combined with ACKs to compute inter-packet delay variations.
   int32_t rtc_packet_id = -1;
   base::TimeTicks send_time;
 };
 
+// Struct that carries a port range.
+struct P2PPortRange {
+  P2PPortRange() : P2PPortRange(0, 0) {}
+  P2PPortRange(uint16_t min_port, uint16_t max_port)
+      : min_port(min_port), max_port(max_port) {
+    DCHECK_LE(min_port, max_port);
+    DCHECK((min_port == 0 && max_port == 0) || min_port > 0);
+  }
+  uint16_t min_port;
+  uint16_t max_port;
+};
+
 }  // namespace content
 
 #endif  // CONTENT_COMMON_P2P_SOCKET_TYPE_H_