Allow remote fingerprint update during a call

webrtc/p2p/base/transportchannel.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 61 matching lines @@
 
   // Returns the states of this channel.  Each time one of these states changes,
   // a signal is raised.  These states are aggregated by the TransportManager.
   bool writable() const { return writable_; }
   bool receiving() const { return receiving_; }
   DtlsTransportState dtls_state() const { return dtls_state_; }
   sigslot::signal1<TransportChannel*> SignalWritableState;
   // Emitted when the TransportChannel's ability to send has changed.
   sigslot::signal1<TransportChannel*> SignalReadyToSend;
   sigslot::signal1<TransportChannel*> SignalReceivingState;
-  // Emitted when the DtlsTransportState has changed.
-  sigslot::signal1<TransportChannel*> SignalDtlsState;
+  // Emitted whenever DTLS-SRTP is setup which will require setting up a new
+  // SRTP context.
+  sigslot::signal2<TransportChannel*, DtlsTransportState> SignalDtlsState;
 
   // Attempts to send the given packet.  The return value is < 0 on failure.
   // TODO: Remove the default argument once channel code is updated.
   virtual int SendPacket(const char* data, size_t len,
                          const rtc::PacketOptions& options,
                          int flags = 0) = 0;
 
   // Sets a socket option on this channel.  Note that not all options are
   // supported by all transport types.
   virtual int SetOption(rtc::Socket::Option opt, int value) = 0;
@@ skipping 79 matching lines @@
   bool writable_;
   bool receiving_;
   DtlsTransportState dtls_state_ = DTLS_TRANSPORT_NEW;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(TransportChannel);
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_P2P_BASE_TRANSPORTCHANNEL_H_