QUIC: retransmit packets with the correct encryption.

net/quic/quic_protocol.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_QUIC_QUIC_PROTOCOL_H_
 #define NET_QUIC_QUIC_PROTOCOL_H_
 
 #include <stddef.h>
 #include <limits>
 #include <map>
@@ skipping 443 matching lines @@
   QuicGoAwayFrame() {}
   QuicGoAwayFrame(QuicErrorCode error_code,
                   QuicStreamId last_good_stream_id,
                   const std::string& reason);
 
   QuicErrorCode error_code;
   QuicStreamId last_good_stream_id;
   std::string reason_phrase;
 };
 
+// EncryptionLevel enumerates the stages of encryption that a QUIC connection
+// progresses through. When retransmitting a packet, the encryption level needs
+// to be specified so that it is retransmitted at a level which the peer can
+// understand.
+enum EncryptionLevel {
+  ENCRYPTION_NONE = 0,
+  ENCRYPTION_INITIAL = 1,
+  ENCRYPTION_FORWARD_SECURE = 2,
+
+  NUM_ENCRYPTION_LEVELS,
+};
+
 struct NET_EXPORT_PRIVATE QuicFrame {
   QuicFrame() {}
   explicit QuicFrame(QuicPaddingFrame* padding_frame)
       : type(PADDING_FRAME),
         padding_frame(padding_frame) {
   }
   explicit QuicFrame(QuicStreamFrame* stream_frame)
       : type(STREAM_FRAME),
         stream_frame(stream_frame) {
   }
@@ skipping 147 matching lines @@
   ~RetransmittableFrames();
 
   // Allocates a local copy of the referenced StringPiece has QuicStreamFrame
   // use it.
   // Takes ownership of |stream_frame|.
   const QuicFrame& AddStreamFrame(QuicStreamFrame* stream_frame);
   // Takes ownership of the frame inside |frame|.
   const QuicFrame& AddNonStreamFrame(const QuicFrame& frame);
   const QuicFrames& frames() const { return frames_; }
 
+  void set_encryption_level(EncryptionLevel level);
+  EncryptionLevel encryption_level() const {
+    return encryption_level_;
+  }
+
  private:
   QuicFrames frames_;
+  EncryptionLevel encryption_level_;
   // Data referenced by the StringPiece of a QuicStreamFrame.
   std::vector<std::string*> stream_data_;
 
   DISALLOW_COPY_AND_ASSIGN(RetransmittableFrames);
 };
 
 struct NET_EXPORT_PRIVATE SerializedPacket {
   SerializedPacket(QuicPacketSequenceNumber sequence_number,
                    QuicPacket* packet,
                    QuicPacketEntropyHash entropy_hash,
@@ skipping 24 matching lines @@
   NET_EXPORT_PRIVATE friend std::ostream& operator<<(
       std::ostream& os, const QuicConsumedData& s);
 
   size_t bytes_consumed;
   bool fin_consumed;
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_PROTOCOL_H_