Reland Allow remote fingerprint update during a call

talk/session/media/channel.h

 /*
  * libjingle
  * Copyright 2004 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 195 matching lines @@
 
   // From TransportChannel
   void OnWritableState(TransportChannel* channel);
   virtual void OnChannelRead(TransportChannel* channel,
                              const char* data,
                              size_t len,
                              const rtc::PacketTime& packet_time,
                              int flags);
   void OnReadyToSend(TransportChannel* channel);
 
+  void OnDtlsState(TransportChannel* channel, DtlsTransportState state);
+
   bool PacketIsRtcp(const TransportChannel* channel, const char* data,
                     size_t len);
   bool SendPacket(bool rtcp,
                   rtc::Buffer* packet,
                   const rtc::PacketOptions& options);
   virtual bool WantsPacket(bool rtcp, rtc::Buffer* packet);
   void HandlePacket(bool rtcp, rtc::Buffer* packet,
                     const rtc::PacketTime& packet_time);
 
   void EnableMedia_w();
   void DisableMedia_w();
   void UpdateWritableState_w();
   void ChannelWritable_w();
   void ChannelNotWritable_w();
   bool AddRecvStream_w(const StreamParams& sp);
   bool RemoveRecvStream_w(uint32_t ssrc);
   bool AddSendStream_w(const StreamParams& sp);
   bool RemoveSendStream_w(uint32_t ssrc);
   virtual bool ShouldSetupDtlsSrtp() const;
   // Do the DTLS key expansion and impose it on the SRTP/SRTCP filters.
   // |rtcp_channel| indicates whether to set up the RTP or RTCP filter.
   bool SetupDtlsSrtp(bool rtcp_channel);
+  void MaybeSetupDtlsSrtp_w();
   // Set the DTLS-SRTP cipher policy on this channel as appropriate.
   bool SetDtlsSrtpCryptoSuites(TransportChannel* tc, bool rtcp);
 
   virtual void ChangeState() = 0;
 
   // Gets the content info appropriate to the channel (audio or video).
   virtual const ContentInfo* GetFirstContent(
       const SessionDescription* sdesc) = 0;
   bool UpdateLocalStreams_w(const std::vector<StreamParams>& streams,
                             ContentAction action,
@@ skipping 385 matching lines @@
   // SetSendParameters.
   DataSendParameters last_send_params_;
   // Last DataRecvParameters sent down to the media_channel() via
   // SetRecvParameters.
   DataRecvParameters last_recv_params_;
 };
 
 }  // namespace cricket
 
 #endif  // TALK_SESSION_MEDIA_CHANNEL_H_