Add 16-bit network id to the candidate signaling.

webrtc/p2p/base/port.h

 /*
  *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 278 matching lines @@
   // Called when the socket is currently able to send.
   void OnReadyToSend();
 
   // Called when the Connection discovers a local peer reflexive candidate.
   // Returns the index of the new local candidate.
   size_t AddPrflxCandidate(const Candidate& local);
 
   void set_candidate_filter(uint32_t candidate_filter) {
     candidate_filter_ = candidate_filter;
   }
-  int32_t network_cost() const { return network_cost_; }
+  int16_t network_cost() const { return network_cost_; }
 
  protected:
   enum {
     MSG_DEAD = 0,
     MSG_FIRST_AVAILABLE
   };
 
   void set_type(const std::string& type) { type_ = type; }
 
   void AddAddress(const rtc::SocketAddress& address,
@@ skipping 86 matching lines @@
 
   // Candidate filter is pushed down to Port such that each Port could
   // make its own decision on how to create candidates. For example,
   // when IceTransportsType is set to relay, both RelayPort and
   // TurnPort will hide raddr to avoid local address leakage.
   uint32_t candidate_filter_;
 
   // A virtual cost perceived by the user, usually based on the network type
   // (WiFi. vs. Cellular). It takes precedence over the priority when
   // comparing two connections.
-  uint32_t network_cost_;
+  uint16_t network_cost_;
 
   friend class Connection;
 };
 
 // Represents a communication link between a port on the local client and a
 // port on the remote client.
 class Connection : public rtc::MessageHandler,
     public sigslot::has_slots<> {
  public:
   struct SentPing {
@@ skipping 248 matching lines @@
            const rtc::PacketOptions& options) override;
   int GetError() override { return error_; }
 
  private:
   int error_ = 0;
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_P2P_BASE_PORT_H_