Allow remote fingerprint update during a call

talk/session/media/srtpfilter.h

 /*
  * libjingle
  * Copyright 2009 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 120 matching lines @@
   // If an HMAC is used, this will decrease the packet size.
   bool UnprotectRtp(void* data, int in_len, int* out_len);
   bool UnprotectRtcp(void* data, int in_len, int* out_len);
 
   // Returns rtp auth params from srtp context.
   bool GetRtpAuthParams(uint8_t** key, int* key_len, int* tag_len);
 
   // Update the silent threshold (in ms) for signaling errors.
   void set_signal_silent_time(uint32_t signal_silent_time_in_ms);
 
+  bool ResetParams();
+
   sigslot::repeater3<uint32_t, Mode, Error> SignalSrtpError;
 
  protected:
   bool ExpectOffer(ContentSource source);
   bool StoreParams(const std::vector<CryptoParams>& params,
                    ContentSource source);
   bool ExpectAnswer(ContentSource source);
   bool DoSetAnswer(const std::vector<CryptoParams>& answer_params,
                      ContentSource source,
                      bool final);
   void CreateSrtpSessions();
   bool NegotiateParams(const std::vector<CryptoParams>& answer_params,
                        CryptoParams* selected_params);
   bool ApplyParams(const CryptoParams& send_params,
                    const CryptoParams& recv_params);
-  bool ResetParams();
   static bool ParseKeyParams(const std::string& params, uint8_t* key, int len);
 
  private:
   enum State {
     ST_INIT,           // SRTP filter unused.
     ST_SENTOFFER,      // Offer with SRTP parameters sent.
     ST_RECEIVEDOFFER,  // Offer with SRTP parameters received.
     ST_SENTPRANSWER_NO_CRYPTO,  // Sent provisional answer without crypto.
     // Received provisional answer without crypto.
     ST_RECEIVEDPRANSWER_NO_CRYPTO,
@@ skipping 153 matching lines @@
   std::map<FailureKey, FailureStat> failures_;
   // Threshold in ms to silent the signaling errors.
   uint32_t signal_silent_time_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(SrtpStat);
 };
 
 }  // namespace cricket
 
 #endif  // TALK_SESSION_MEDIA_SRTPFILTER_H_