Add support for GCM cipher suites from RFC 7714.

talk/session/media/mediasession.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 85 matching lines @@
 struct MediaSessionOptions {
   MediaSessionOptions() :
       recv_audio(true),
       recv_video(false),
       data_channel_type(DCT_NONE),
       is_muc(false),
       vad_enabled(true),  // When disabled, removes all CN codecs from SDP.
       rtcp_mux_enabled(true),
       bundle_enabled(false),
       video_bandwidth(kAutoBandwidth),
-      data_bandwidth(kDataMaxBandwidth) {
+      data_bandwidth(kDataMaxBandwidth),
+      enable_gcm_ciphers(false) {

[pthatcher1, 2015/12/18 20:31:32]

Same here: can you change it to enable_gcm_crypto_suites?

[joachim, 2015/12/19 15:26:23]

Done.

   }
 
   bool has_audio() const {
     return recv_audio || HasSendMediaStream(MEDIA_TYPE_AUDIO);
   }
   bool has_video() const {
     return recv_video || HasSendMediaStream(MEDIA_TYPE_VIDEO);
   }
   bool has_data() const { return data_channel_type != DCT_NONE; }
 
@@ skipping 20 matching lines @@
   bool recv_audio;
   bool recv_video;
   DataChannelType data_channel_type;
   bool is_muc;
   bool vad_enabled;
   bool rtcp_mux_enabled;
   bool bundle_enabled;
   // bps. -1 == auto.
   int video_bandwidth;
   int data_bandwidth;
+  bool enable_gcm_ciphers;
   TransportOptions transport_options;
 
   struct Stream {
     Stream(MediaType type,
            const std::string& id,
            const std::string& sync_label,
            int num_sim_layers)
         : type(type), id(id), sync_label(sync_label),
           num_sim_layers(num_sim_layers) {
     }
@@ skipping 391 matching lines @@
 void GetSupportedDataCryptoSuites(std::vector<int>* crypto_suites);
 void GetDefaultSrtpCryptoSuites(std::vector<int>* crypto_suites);
 void GetSupportedAudioCryptoSuiteNames(
     std::vector<std::string>* crypto_suite_names);
 void GetSupportedVideoCryptoSuiteNames(
     std::vector<std::string>* crypto_suite_names);
 void GetSupportedDataCryptoSuiteNames(
     std::vector<std::string>* crypto_suite_names);
 void GetDefaultSrtpCryptoSuiteNames(
     std::vector<std::string>* crypto_suite_names);
+void FilterGcmCiphers(std::vector<int>* crypto_suites);
+void FilterGcmCipherNames(std::vector<std::string>* crypto_suites);
 
 }  // namespace cricket
 
 #endif  // TALK_SESSION_MEDIA_MEDIASESSION_H_