Move shared files in net/quic/ into net/quic/core/

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 <stddef.h>
-#include <stdint.h>
-
-#include <utility>
-#include <vector>
-
-#include "base/logging.h"
-#include "base/strings/string_piece.h"
-#include "net/base/net_export.h"
-#include "net/quic/crypto/crypto_handshake_message.h"
-#include "net/quic/quic_protocol.h"
-
-namespace net {
-
-class CryptoFramer;
-class QuicData;
-class QuicDataReader;
-class QuicDataWriter;
-
-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 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 nullptr 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_; }
-  const std::string& error_detail() const { return error_detail_; }
-
-  // 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 nullptr if there was an error.
-  static QuicData* ConstructHandshakeMessage(
-      const CryptoHandshakeMessage& message);
-
- private:
-  // Clears per-message state.  Does not clear the visitor.
-  void Clear();
-
-  // Process does does the work of |ProcessInput|, but returns an error code,
-  // doesn't set error_ and doesn't call |visitor_->OnError()|.
-  QuicErrorCode Process(base::StringPiece input);
-
-  static bool WritePadTag(QuicDataWriter* writer,
-                          size_t pad_length,
-                          uint32_t* end_offset);
-
-  // Represents the current state of the parsing state machine.
-  enum CryptoFramerState {
-    STATE_READING_TAG,
-    STATE_READING_NUM_ENTRIES,
-    STATE_READING_TAGS_AND_LENGTHS,
-    STATE_READING_VALUES
-  };
-
-  // Visitor to invoke when messages are parsed.
-  CryptoFramerVisitorInterface* visitor_;
-  // Last error.
-  QuicErrorCode error_;
-  // Remaining unparsed data.
-  std::string buffer_;
-  // Current state of the parsing.
-  CryptoFramerState state_;
-  // The message currently being parsed.
-  CryptoHandshakeMessage message_;
-  // The issue which caused |error_|
-  std::string error_detail_;
-  // Number of entires in the message currently being parsed.
-  uint16_t num_entries_;
-  // tags_and_lengths_ contains the tags that are currently being parsed and
-  // their lengths.
-  std::vector<std::pair<QuicTag, size_t>> tags_and_lengths_;
-  // Cumulative length of all values in the message currently being parsed.
-  size_t values_len_;
-};
-
-}  // namespace net
-
-#endif  // NET_QUIC_CRYPTO_CRYPTO_FRAMER_H_