Revert 162259 - Add QuicFramer and friends.

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>
-
-#include "base/basictypes.h"
-#include "base/logging.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/string_piece.h"
-#include "net/base/net_export.h"
-#include "net/quic/crypto/crypto_protocol.h"
-#include "net/quic/quic_protocol.h"
-
-namespace net {
-
-class CryptoFramer;
-class QuicDataReader;
-class QuicData;
-
-class NET_EXPORT_PRIVATE CryptoFramerVisitorInterface {
- public:
-  virtual ~CryptoFramerVisitorInterface() {}
-
-  // Called if an error is detected.
-  virtual void OnError(CryptoFramer* framer) = 0;
-
-  // Called when a complete handshake message has been parsed.
-  virtual void OnHandshakeMessage(const CryptoHandshakeMessage& message) = 0;
-};
-
-// A class for framing the crypto message that are exchanged in a QUIC session.
-class NET_EXPORT_PRIVATE CryptoFramer {
- public:
-  CryptoFramer();
-
-  virtual ~CryptoFramer();
-
-  // Set callbacks to be called from the framer.  A visitor must be set, or
-  // else the framer will likely 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 delievered in order.  Returns
-  // false if there was an error, and true otherwise.
-  bool ProcessInput(base::StringPiece input);
-
-  // Serializes |message| into |packet|.  Returns false if there was an
-  // error, and true otherwise.
-  bool ConstructHandshakeMessage(const CryptoHandshakeMessage& message,
-                                 QuicData** packet);
-
- private:
-  // Clears per-message state.  Does not clear the visitor.
-  void Clear();
-
-  void set_error(QuicErrorCode error) {
-    error_ = error;
-  }
-
-  enum CryptoFramerState {
-    STATE_READING_TAG,
-    STATE_READING_NUM_ENTRIES,
-    STATE_READING_KEY_TAGS,
-    STATE_READING_LENGTHS,
-    STATE_READING_VALUES
-  };
-
-  // Visitor to send invoke when messages are parsed.
-  CryptoFramerVisitorInterface* visitor_;
-  // Last error.
-  QuicErrorCode error_;
-  // Remaining unparsed data.
-  std::string buffer_;
-  // Current state of the parsing.
-  CryptoFramerState state_;
-  // Tag of the message currently being parsed.
-  CryptoTag message_tag_;
-  // Number of entires in the message currently being parsed.
-  uint16 num_entries_;
-  // Vector of tags in the message currently being parsed.
-  std::vector<CryptoTag> tags_;
-  // Length of the data associated with each tag in the message currently
-  // being parsed.
-  std::map<CryptoTag, size_t> tag_length_map_;
-  // Length of the 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_