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

net/quic/crypto/crypto_handshake_message.h

-// Copyright (c) 2013 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_HANDSHAKE_MESSAGE_H_
-#define NET_QUIC_CRYPTO_CRYPTO_HANDSHAKE_MESSAGE_H_
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include <cstdint>
-#include <memory>
-#include <string>
-#include <vector>
-
-#include "base/strings/string_piece.h"
-#include "net/base/net_export.h"
-#include "net/quic/quic_protocol.h"
-
-namespace net {
-
-// An intermediate format of a handshake message that's convenient for a
-// CryptoFramer to serialize from or parse into.
-class NET_EXPORT_PRIVATE CryptoHandshakeMessage {
- public:
-  CryptoHandshakeMessage();
-  CryptoHandshakeMessage(const CryptoHandshakeMessage& other);
-  CryptoHandshakeMessage(CryptoHandshakeMessage&& other);
-  ~CryptoHandshakeMessage();
-
-  CryptoHandshakeMessage& operator=(const CryptoHandshakeMessage& other);
-  CryptoHandshakeMessage& operator=(CryptoHandshakeMessage&& other);
-
-  // Clears state.
-  void Clear();
-
-  // GetSerialized returns the serialized form of this message and caches the
-  // result. Subsequently altering the message does not invalidate the cache.
-  const QuicData& GetSerialized() const;
-
-  // MarkDirty invalidates the cache created by |GetSerialized|.
-  void MarkDirty();
-
-  // SetValue sets an element with the given tag to the raw, memory contents of
-  // |v|.
-  template <class T>
-  void SetValue(QuicTag tag, const T& v) {
-    tag_value_map_[tag] =
-        std::string(reinterpret_cast<const char*>(&v), sizeof(v));
-  }
-
-  // SetVector sets an element with the given tag to the raw contents of an
-  // array of elements in |v|.
-  template <class T>
-  void SetVector(QuicTag tag, const std::vector<T>& v) {
-    if (v.empty()) {
-      tag_value_map_[tag] = std::string();
-    } else {
-      tag_value_map_[tag] = std::string(reinterpret_cast<const char*>(&v[0]),
-                                        v.size() * sizeof(T));
-    }
-  }
-
-  // Returns the message tag.
-  QuicTag tag() const { return tag_; }
-  // Sets the message tag.
-  void set_tag(QuicTag tag) { tag_ = tag; }
-
-  const QuicTagValueMap& tag_value_map() const { return tag_value_map_; }
-
-  void SetStringPiece(QuicTag tag, base::StringPiece value);
-
-  // Erase removes a tag/value, if present, from the message.
-  void Erase(QuicTag tag);
-
-  // GetTaglist finds an element with the given tag containing zero or more
-  // tags. If such a tag doesn't exist, it returns false. Otherwise it sets
-  // |out_tags| and |out_len| to point to the array of tags and returns true.
-  // The array points into the CryptoHandshakeMessage and is valid only for as
-  // long as the CryptoHandshakeMessage exists and is not modified.
-  QuicErrorCode GetTaglist(QuicTag tag,
-                           const QuicTag** out_tags,
-                           size_t* out_len) const;
-
-  bool GetStringPiece(QuicTag tag, base::StringPiece* out) const;
-
-  // GetNthValue24 interprets the value with the given tag to be a series of
-  // 24-bit, length prefixed values and it returns the subvalue with the given
-  // index.
-  QuicErrorCode GetNthValue24(QuicTag tag,
-                              unsigned index,
-                              base::StringPiece* out) const;
-  QuicErrorCode GetUint32(QuicTag tag, uint32_t* out) const;
-  QuicErrorCode GetUint64(QuicTag tag, uint64_t* out) const;
-
-  // size returns 4 (message tag) + 2 (uint16_t, number of entries) +
-  // (4 (tag) + 4 (end offset))*tag_value_map_.size() + ∑ value sizes.
-  size_t size() const;
-
-  // set_minimum_size sets the minimum number of bytes that the message should
-  // consume. The CryptoFramer will add a PAD tag as needed when serializing in
-  // order to ensure this. Setting a value of 0 disables padding.
-  //
-  // Padding is useful in order to ensure that messages are a minimum size. A
-  // QUIC server can require a minimum size in order to reduce the
-  // amplification factor of any mirror DoS attack.
-  void set_minimum_size(size_t min_bytes);
-
-  size_t minimum_size() const;
-
-  // DebugString returns a multi-line, string representation of the message
-  // suitable for including in debug output.
-  std::string DebugString() const;
-
- private:
-  // GetPOD is a utility function for extracting a plain-old-data value. If
-  // |tag| exists in the message, and has a value of exactly |len| bytes then
-  // it copies |len| bytes of data into |out|. Otherwise |len| bytes at |out|
-  // are zeroed out.
-  //
-  // If used to copy integers then this assumes that the machine is
-  // little-endian.
-  QuicErrorCode GetPOD(QuicTag tag, void* out, size_t len) const;
-
-  std::string DebugStringInternal(size_t indent) const;
-
-  QuicTag tag_;
-  QuicTagValueMap tag_value_map_;
-
-  size_t minimum_size_;
-
-  // The serialized form of the handshake message. This member is constructed
-  // lasily.
-  mutable std::unique_ptr<QuicData> serialized_;
-};
-
-}  // namespace net
-
-#endif  // NET_QUIC_CRYPTO_CRYPTO_HANDSHAKE_MESSAGE_H_