QUIC - Some sketching of the crypto handshake.

net/quic/crypto/crypto_framer.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_CRYPTO_CRYPTO_FRAMER_H_
 #define NET_QUIC_CRYPTO_CRYPTO_FRAMER_H_
 
 #include <map>
 #include <vector>
 
@@ skipping 24 matching lines @@
 };
 
 // A class for framing the crypto messages that are exchanged in a QUIC
 // session.
 class NET_EXPORT_PRIVATE CryptoFramer {
  public:
   CryptoFramer();
 
   virtual ~CryptoFramer();
 
+  // ParseMessage parses exactly one message from the given StringPiece. If
+  // there is an error, the message is truncated, or the message has trailing
+  // garbage then NULL will be returned.
+  static CryptoHandshakeMessage* ParseMessage(base::StringPiece in);
+
   // Set callbacks to be called from the framer.  A visitor must be set, or
   // else the framer will crash.  It is acceptable for the visitor to do
   // nothing.  If this is called multiple times, only the last visitor
   // will be used.  |visitor| will be owned by the framer.
   void set_visitor(CryptoFramerVisitorInterface* visitor) {
     visitor_ = visitor;
   }
 
   QuicErrorCode error() const {
     return error_;
   }
 
   // Processes input data, which must be delivered in order.  Returns
   // false if there was an error, and true otherwise.
   bool ProcessInput(base::StringPiece input);
 
   // Returns the number of bytes of buffered input data remaining to be
   // parsed.
   size_t InputBytesRemaining() const {
     return buffer_.length();
   }
 
   // Returns a new QuicData owned by the caller that contains a serialized
   // |message|, or NULL if there was an error.
-  QuicData* ConstructHandshakeMessage(const CryptoHandshakeMessage& message);
+  static QuicData* ConstructHandshakeMessage(
+      const CryptoHandshakeMessage& message);
 
  private:
   // Clears per-message state.  Does not clear the visitor.
   void Clear();
 
   void set_error(QuicErrorCode error) {
     error_ = error;
   }
 
   // Represents the current state of the parsing state machine.
@@ skipping 24 matching lines @@
   std::map<CryptoTag, size_t> tag_length_map_;
   // Data associated with each tag in the message currently being parsed.
   CryptoTagValueMap tag_value_map_;
   // Cumulative length of all values in the message currently being parsed.
   size_t values_len_;
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_CRYPTO_CRYPTO_FRAMER_H_