Reset the BWE when the network changes

webrtc/base/network.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 321 matching lines @@
   void set_scope_id(int id) { scope_id_ = id; }
 
   // Indicates whether this network should be ignored, perhaps because
   // the IP is 0, or the interface is one we know is invalid.
   bool ignored() const { return ignored_; }
   void set_ignored(bool ignored) { ignored_ = ignored; }
 
   AdapterType type() const { return type_; }
   void set_type(AdapterType type) { type_ = type; }
 
+  // Converts the key to an integer id.
+  int id() const { return static_cast<int>(std::hash<std::string>()(key_)); }

[pthatcher1, 2016/03/16 21:22:02]

We should probably make this a uint16_t or uint32_t to make it clear what the
range is.  We can't have this thing return a value outside the range that the
STUN attribute could support. I think I'd prefer uint16_t so we could have it
fit into the same STUN attribute as network-cost.

[honghaiz3, 2016/03/17 03:38:26]

Done.

+
   int preference() const { return preference_; }
   void set_preference(int preference) { preference_ = preference; }
 
   // When we enumerate networks and find a previously-seen network is missing,
   // we do not remove it (because it may be used elsewhere). Instead, we mark
   // it inactive, so that we can detect network changes properly.
   bool active() const { return active_; }
   void set_active(bool active) {
     if (active_ == active) {
       return;
@@ skipping 20 matching lines @@
   AdapterType type_;
   int preference_;
   bool active_ = true;
 
   friend class NetworkManager;
 };
 
 }  // namespace rtc
 
 #endif  // WEBRTC_BASE_NETWORK_H_