diff --git a/quic/core/quic_packets.h b/quic/core/quic_packets.h
new file mode 100644
index 0000000..d2aaf34
--- /dev/null
+++ b/quic/core/quic_packets.h
@@ -0,0 +1,369 @@
+// 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 QUICHE_QUIC_CORE_QUIC_PACKETS_H_
+#define QUICHE_QUIC_CORE_QUIC_PACKETS_H_
+
+#include <cstddef>
+#include <cstdint>
+#include <limits>
+#include <list>
+#include <memory>
+#include <ostream>
+#include <utility>
+#include <vector>
+
+#include "base/macros.h"
+#include "net/third_party/quiche/src/quic/core/frames/quic_frame.h"
+#include "net/third_party/quiche/src/quic/core/quic_ack_listener_interface.h"
+#include "net/third_party/quiche/src/quic/core/quic_bandwidth.h"
+#include "net/third_party/quiche/src/quic/core/quic_constants.h"
+#include "net/third_party/quiche/src/quic/core/quic_error_codes.h"
+#include "net/third_party/quiche/src/quic/core/quic_time.h"
+#include "net/third_party/quiche/src/quic/core/quic_types.h"
+#include "net/third_party/quiche/src/quic/core/quic_versions.h"
+#include "net/third_party/quiche/src/quic/platform/api/quic_export.h"
+#include "net/third_party/quiche/src/quic/platform/api/quic_socket_address.h"
+#include "net/third_party/quiche/src/quic/platform/api/quic_string_piece.h"
+#include "net/third_party/quiche/src/quic/platform/api/quic_uint128.h"
+
+namespace quic {
+
+class QuicPacket;
+struct QuicPacketHeader;
+
+// Number of connection ID bytes that are actually included over the wire.
+QUIC_EXPORT_PRIVATE QuicConnectionIdLength
+GetIncludedConnectionIdLength(QuicConnectionId connection_id,
+                              QuicConnectionIdIncluded connection_id_included);
+
+// Number of destination connection ID bytes that are actually included over the
+// wire for this particular header.
+QUIC_EXPORT_PRIVATE QuicConnectionIdLength
+GetIncludedDestinationConnectionIdLength(const QuicPacketHeader& header);
+
+// Number of source connection ID bytes that are actually included over the
+// wire for this particular header.
+QUIC_EXPORT_PRIVATE QuicConnectionIdLength
+GetIncludedSourceConnectionIdLength(const QuicPacketHeader& header);
+
+// Size in bytes of the data packet header.
+QUIC_EXPORT_PRIVATE size_t GetPacketHeaderSize(QuicTransportVersion version,
+                                               const QuicPacketHeader& header);
+
+QUIC_EXPORT_PRIVATE size_t
+GetPacketHeaderSize(QuicTransportVersion version,
+                    QuicConnectionIdLength destination_connection_id_length,
+                    QuicConnectionIdLength source_connection_id_length,
+                    bool include_version,
+                    bool include_diversification_nonce,
+                    QuicPacketNumberLength packet_number_length,
+                    QuicVariableLengthIntegerLength retry_token_length_length,
+                    QuicByteCount retry_token_length,
+                    QuicVariableLengthIntegerLength length_length);
+
+// Index of the first byte in a QUIC packet of encrypted data.
+QUIC_EXPORT_PRIVATE size_t
+GetStartOfEncryptedData(QuicTransportVersion version,
+                        const QuicPacketHeader& header);
+
+QUIC_EXPORT_PRIVATE size_t GetStartOfEncryptedData(
+    QuicTransportVersion version,
+    QuicConnectionIdLength destination_connection_id_length,
+    QuicConnectionIdLength source_connection_id_length,
+    bool include_version,
+    bool include_diversification_nonce,
+    QuicPacketNumberLength packet_number_length,
+    QuicVariableLengthIntegerLength retry_token_length_length,
+    QuicByteCount retry_token_length,
+    QuicVariableLengthIntegerLength length_length);
+
+struct QUIC_EXPORT_PRIVATE QuicPacketHeader {
+  QuicPacketHeader();
+  QuicPacketHeader(const QuicPacketHeader& other);
+  ~QuicPacketHeader();
+
+  QUIC_EXPORT_PRIVATE friend std::ostream& operator<<(
+      std::ostream& os,
+      const QuicPacketHeader& header);
+
+  // Universal header. All QuicPacket headers will have a connection_id and
+  // public flags.
+  QuicConnectionId destination_connection_id;
+  QuicConnectionIdIncluded destination_connection_id_included;
+  QuicConnectionId source_connection_id;
+  QuicConnectionIdIncluded source_connection_id_included;
+  // This is only used for Google QUIC.
+  bool reset_flag;
+  // For Google QUIC, version flag in packets from the server means version
+  // negotiation packet. For IETF QUIC, version flag means long header.
+  bool version_flag;
+  // Indicates whether |possible_stateless_reset_token| contains a valid value
+  // parsed from the packet buffer. IETF QUIC only, always false for GQUIC.
+  bool has_possible_stateless_reset_token;
+  QuicPacketNumberLength packet_number_length;
+  ParsedQuicVersion version;
+  // nonce contains an optional, 32-byte nonce value. If not included in the
+  // packet, |nonce| will be empty.
+  DiversificationNonce* nonce;
+  QuicPacketNumber packet_number;
+  // Format of this header.
+  PacketHeaderFormat form;
+  // Short packet type is reflected in packet_number_length.
+  QuicLongHeaderType long_packet_type;
+  // Only valid if |has_possible_stateless_reset_token| is true.
+  // Stores last 16 bytes of a this packet, used to check whether this packet is
+  // a stateless reset packet on decryption failure.
+  QuicUint128 possible_stateless_reset_token;
+  // Length of the retry token length variable length integer field,
+  // carried only by v99 IETF Initial packets.
+  QuicVariableLengthIntegerLength retry_token_length_length;
+  // Retry token, carried only by v99 IETF Initial packets.
+  QuicStringPiece retry_token;
+  // Length of the length variable length integer field,
+  // carried only by v99 IETF Initial, 0-RTT and Handshake packets.
+  QuicVariableLengthIntegerLength length_length;
+  // Length of the packet number and payload, carried only by v99 IETF Initial,
+  // 0-RTT and Handshake packets. Also includes the length of the
+  // diversification nonce in server to client 0-RTT packets.
+  QuicByteCount remaining_packet_length;
+};
+
+struct QUIC_EXPORT_PRIVATE QuicPublicResetPacket {
+  QuicPublicResetPacket();
+  explicit QuicPublicResetPacket(QuicConnectionId connection_id);
+
+  QuicConnectionId connection_id;
+  QuicPublicResetNonceProof nonce_proof;
+  QuicSocketAddress client_address;
+  // An arbitrary string to identify an endpoint. Used by clients to
+  // differentiate traffic from Google servers vs Non-google servers.
+  // Will not be used if empty().
+  QuicString endpoint_id;
+};
+
+struct QUIC_EXPORT_PRIVATE QuicVersionNegotiationPacket {
+  QuicVersionNegotiationPacket();
+  explicit QuicVersionNegotiationPacket(QuicConnectionId connection_id);
+  QuicVersionNegotiationPacket(const QuicVersionNegotiationPacket& other);
+  ~QuicVersionNegotiationPacket();
+
+  QuicConnectionId connection_id;
+  ParsedQuicVersionVector versions;
+};
+
+struct QUIC_EXPORT_PRIVATE QuicIetfStatelessResetPacket {
+  QuicIetfStatelessResetPacket();
+  QuicIetfStatelessResetPacket(const QuicPacketHeader& header,
+                               QuicUint128 token);
+  QuicIetfStatelessResetPacket(const QuicIetfStatelessResetPacket& other);
+  ~QuicIetfStatelessResetPacket();
+
+  QuicPacketHeader header;
+  QuicUint128 stateless_reset_token;
+};
+
+class QUIC_EXPORT_PRIVATE QuicData {
+ public:
+  QuicData(const char* buffer, size_t length);
+  QuicData(const char* buffer, size_t length, bool owns_buffer);
+  QuicData(const QuicData&) = delete;
+  QuicData& operator=(const QuicData&) = delete;
+  virtual ~QuicData();
+
+  QuicStringPiece AsStringPiece() const {
+    return QuicStringPiece(data(), length());
+  }
+
+  const char* data() const { return buffer_; }
+  size_t length() const { return length_; }
+
+ private:
+  const char* buffer_;
+  size_t length_;
+  bool owns_buffer_;
+};
+
+class QUIC_EXPORT_PRIVATE QuicPacket : public QuicData {
+ public:
+  QuicPacket(char* buffer,
+             size_t length,
+             bool owns_buffer,
+             QuicConnectionIdLength destination_connection_id_length,
+             QuicConnectionIdLength source_connection_id_length,
+             bool includes_version,
+             bool includes_diversification_nonce,
+             QuicPacketNumberLength packet_number_length,
+             QuicVariableLengthIntegerLength retry_token_length_length,
+             QuicByteCount retry_token_length,
+             QuicVariableLengthIntegerLength length_length);
+  QuicPacket(QuicTransportVersion version,
+             char* buffer,
+             size_t length,
+             bool owns_buffer,
+             const QuicPacketHeader& header);
+  QuicPacket(const QuicPacket&) = delete;
+  QuicPacket& operator=(const QuicPacket&) = delete;
+
+  QuicStringPiece AssociatedData(QuicTransportVersion version) const;
+  QuicStringPiece Plaintext(QuicTransportVersion version) const;
+
+  char* mutable_data() { return buffer_; }
+
+ private:
+  char* buffer_;
+  const QuicConnectionIdLength destination_connection_id_length_;
+  const QuicConnectionIdLength source_connection_id_length_;
+  const bool includes_version_;
+  const bool includes_diversification_nonce_;
+  const QuicPacketNumberLength packet_number_length_;
+  const QuicVariableLengthIntegerLength retry_token_length_length_;
+  const QuicByteCount retry_token_length_;
+  const QuicVariableLengthIntegerLength length_length_;
+};
+
+class QUIC_EXPORT_PRIVATE QuicEncryptedPacket : public QuicData {
+ public:
+  QuicEncryptedPacket(const char* buffer, size_t length);
+  QuicEncryptedPacket(const char* buffer, size_t length, bool owns_buffer);
+  QuicEncryptedPacket(const QuicEncryptedPacket&) = delete;
+  QuicEncryptedPacket& operator=(const QuicEncryptedPacket&) = delete;
+
+  // Clones the packet into a new packet which owns the buffer.
+  std::unique_ptr<QuicEncryptedPacket> Clone() const;
+
+  // By default, gtest prints the raw bytes of an object. The bool data
+  // member (in the base class QuicData) causes this object to have padding
+  // bytes, which causes the default gtest object printer to read
+  // uninitialize memory. So we need to teach gtest how to print this object.
+  QUIC_EXPORT_PRIVATE friend std::ostream& operator<<(
+      std::ostream& os,
+      const QuicEncryptedPacket& s);
+};
+
+// A received encrypted QUIC packet, with a recorded time of receipt.
+class QUIC_EXPORT_PRIVATE QuicReceivedPacket : public QuicEncryptedPacket {
+ public:
+  QuicReceivedPacket(const char* buffer, size_t length, QuicTime receipt_time);
+  QuicReceivedPacket(const char* buffer,
+                     size_t length,
+                     QuicTime receipt_time,
+                     bool owns_buffer);
+  QuicReceivedPacket(const char* buffer,
+                     size_t length,
+                     QuicTime receipt_time,
+                     bool owns_buffer,
+                     int ttl,
+                     bool ttl_valid);
+  QuicReceivedPacket(const char* buffer,
+                     size_t length,
+                     QuicTime receipt_time,
+                     bool owns_buffer,
+                     int ttl,
+                     bool ttl_valid,
+                     char* packet_headers,
+                     size_t headers_length,
+                     bool owns_header_buffer);
+  ~QuicReceivedPacket();
+  QuicReceivedPacket(const QuicReceivedPacket&) = delete;
+  QuicReceivedPacket& operator=(const QuicReceivedPacket&) = delete;
+
+  // Clones the packet into a new packet which owns the buffer.
+  std::unique_ptr<QuicReceivedPacket> Clone() const;
+
+  // Returns the time at which the packet was received.
+  QuicTime receipt_time() const { return receipt_time_; }
+
+  // This is the TTL of the packet, assuming ttl_vaild_ is true.
+  int ttl() const { return ttl_; }
+
+  // Start of packet headers.
+  char* packet_headers() const { return packet_headers_; }
+
+  // Length of packet headers.
+  int headers_length() const { return headers_length_; }
+
+  // By default, gtest prints the raw bytes of an object. The bool data
+  // member (in the base class QuicData) causes this object to have padding
+  // bytes, which causes the default gtest object printer to read
+  // uninitialize memory. So we need to teach gtest how to print this object.
+  QUIC_EXPORT_PRIVATE friend std::ostream& operator<<(
+      std::ostream& os,
+      const QuicReceivedPacket& s);
+
+ private:
+  const QuicTime receipt_time_;
+  int ttl_;
+  // Points to the start of packet headers.
+  char* packet_headers_;
+  // Length of packet headers.
+  int headers_length_;
+  // Whether owns the buffer for packet headers.
+  bool owns_header_buffer_;
+};
+
+struct QUIC_EXPORT_PRIVATE SerializedPacket {
+  SerializedPacket(QuicPacketNumber packet_number,
+                   QuicPacketNumberLength packet_number_length,
+                   const char* encrypted_buffer,
+                   QuicPacketLength encrypted_length,
+                   bool has_ack,
+                   bool has_stop_waiting);
+  SerializedPacket(const SerializedPacket& other);
+  SerializedPacket& operator=(const SerializedPacket& other);
+  SerializedPacket(SerializedPacket&& other);
+  ~SerializedPacket();
+
+  // Not owned.
+  const char* encrypted_buffer;
+  QuicPacketLength encrypted_length;
+  QuicFrames retransmittable_frames;
+  IsHandshake has_crypto_handshake;
+  // -1: full padding to the end of a max-sized packet
+  //  0: no padding
+  //  otherwise: only pad up to num_padding_bytes bytes
+  int16_t num_padding_bytes;
+  QuicPacketNumber packet_number;
+  QuicPacketNumberLength packet_number_length;
+  EncryptionLevel encryption_level;
+  bool has_ack;
+  bool has_stop_waiting;
+  TransmissionType transmission_type;
+  QuicPacketNumber original_packet_number;
+  // The largest acked of the AckFrame in this packet if has_ack is true,
+  // 0 otherwise.
+  QuicPacketNumber largest_acked;
+};
+
+// Deletes and clears all the frames and the packet from serialized packet.
+QUIC_EXPORT_PRIVATE void ClearSerializedPacket(
+    SerializedPacket* serialized_packet);
+
+// Allocates a new char[] of size |packet.encrypted_length| and copies in
+// |packet.encrypted_buffer|.
+QUIC_EXPORT_PRIVATE char* CopyBuffer(const SerializedPacket& packet);
+
+struct QUIC_EXPORT_PRIVATE SerializedPacketDeleter {
+  void operator()(SerializedPacket* packet) {
+    if (packet->encrypted_buffer != nullptr) {
+      delete[] packet->encrypted_buffer;
+    }
+    delete packet;
+  }
+};
+
+// On destruction, OwningSerializedPacketPointer deletes a packet's (on-heap)
+// encrypted_buffer before deleting the (also on-heap) packet itself.
+// TODO(wub): Maybe delete retransmittable_frames too?
+typedef std::unique_ptr<SerializedPacket, SerializedPacketDeleter>
+    OwningSerializedPacketPointer;
+
+// Context for an incoming packet.
+struct QUIC_EXPORT_PRIVATE QuicPerPacketContext {
+  virtual ~QuicPerPacketContext() {}
+};
+
+}  // namespace quic
+
+#endif  // QUICHE_QUIC_CORE_QUIC_PACKETS_H_