Land Recent QUIC changes.

net/quic/quic_protocol.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_QUIC_PROTOCOL_H_
 #define NET_QUIC_QUIC_PROTOCOL_H_
 
 #include <stddef.h>
 #include <limits>
 #include <map>
@@ skipping 35 matching lines @@
 // Maximum size in bytes of a QUIC packet.
 const QuicByteCount kMaxPacketSize = 1200;
 
 // Maximum number of open streams per connection.
 const size_t kDefaultMaxStreamsPerConnection = 100;
 
 // Number of bytes reserved for public flags in the packet header.
 const size_t kPublicFlagsSize = 1;
 // Number of bytes reserved for version number in the packet header.
 const size_t kQuicVersionSize = 4;
-// Number of bytes reserved for sequence number in the packet header.
-const size_t kSequenceNumberSize = 6;
 // Number of bytes reserved for private flags in the packet header.
 const size_t kPrivateFlagsSize = 1;
 // Number of bytes reserved for FEC group in the packet header.
 const size_t kFecGroupSize = 1;
 // Number of bytes reserved for the nonce proof in public reset packet.
 const size_t kPublicResetNonceSize = 8;
 
 // Signifies that the QuicPacket will contain version of the protocol.
 const bool kIncludeVersion = true;
 
@@ skipping 44 matching lines @@
   PACKET_1BYTE_GUID = 1,
   PACKET_4BYTE_GUID = 4,
   PACKET_8BYTE_GUID = 8
 };
 
 enum InFecGroup {
   NOT_IN_FEC_GROUP,
   IN_FEC_GROUP,
 };
 
+enum QuicSequenceNumberLength {
+  PACKET_1BYTE_SEQUENCE_NUMBER = 1,
+  PACKET_2BYTE_SEQUENCE_NUMBER = 2,
+  PACKET_4BYTE_SEQUENCE_NUMBER = 4,
+  PACKET_6BYTE_SEQUENCE_NUMBER = 6
+};
+
 enum QuicPacketPublicFlags {
   PACKET_PUBLIC_FLAGS_NONE = 0,
   PACKET_PUBLIC_FLAGS_VERSION = 1 << 0,  // Packet header contains version info.
   PACKET_PUBLIC_FLAGS_RST = 1 << 1,  // Packet is a public reset packet.
   // Packet header guid length in bytes.
   PACKET_PUBLIC_FLAGS_0BYTE_GUID = 0,
   PACKET_PUBLIC_FLAGS_1BYTE_GUID = 1 << 2,
   PACKET_PUBLIC_FLAGS_4BYTE_GUID = 1 << 3,
   PACKET_PUBLIC_FLAGS_8BYTE_GUID = 1 << 3 | 1 << 2,
-  PACKET_PUBLIC_FLAGS_MAX = (1 << 4) - 1  // All bits set.
+  // Packet sequence number length in bytes.
+  PACKET_PUBLIC_FLAGS_1BYTE_SEQUENCE = 0,
+  PACKET_PUBLIC_FLAGS_2BYTE_SEQUENCE = 1 << 4,
+  PACKET_PUBLIC_FLAGS_4BYTE_SEQUENCE = 1 << 5,
+  PACKET_PUBLIC_FLAGS_6BYTE_SEQUENCE = 1 << 5 | 1 << 4,
+  PACKET_PUBLIC_FLAGS_MAX = (1 << 6) - 1  // All bits set.
 };
 
 enum QuicPacketPrivateFlags {
   PACKET_PRIVATE_FLAGS_NONE = 0,
   PACKET_PRIVATE_FLAGS_ENTROPY = 1 << 0,
   PACKET_PRIVATE_FLAGS_FEC_GROUP = 1 << 1,  // Payload is part of an FEC group.
   PACKET_PRIVATE_FLAGS_FEC = 1 << 2,  // Payload is FEC as opposed to frames.
   PACKET_PRIVATE_FLAGS_MAX = (1 << 3) - 1  // All bits set.
 };
 
 // Size in bytes of the data or fec packet header.
 NET_EXPORT_PRIVATE size_t GetPacketHeaderSize(QuicPacketHeader header);
 
-NET_EXPORT_PRIVATE size_t GetPacketHeaderSize(QuicGuidLength guid_length,
-                                              bool include_version,
-                                              InFecGroup is_in_fec_group);
+NET_EXPORT_PRIVATE size_t GetPacketHeaderSize(
+    QuicGuidLength guid_length,
+    bool include_version,
+    QuicSequenceNumberLength sequence_number_length,
+    InFecGroup is_in_fec_group);
 
 // Size in bytes of the public reset packet.
 NET_EXPORT_PRIVATE size_t GetPublicResetPacketSize();
 
 // Index of the first byte in a QUIC packet of FEC protected data.
-NET_EXPORT_PRIVATE size_t GetStartOfFecProtectedData(QuicGuidLength guid_length,
-                                                     bool include_version);
+NET_EXPORT_PRIVATE size_t GetStartOfFecProtectedData(
+    QuicGuidLength guid_length,
+    bool include_version,
+    QuicSequenceNumberLength sequence_number_length);
 // Index of the first byte in a QUIC packet of encrypted data.
-NET_EXPORT_PRIVATE size_t GetStartOfEncryptedData(QuicGuidLength guid_length,
-                                                  bool include_version);
+NET_EXPORT_PRIVATE size_t GetStartOfEncryptedData(
+    QuicGuidLength guid_length,
+    bool include_version,
+    QuicSequenceNumberLength sequence_number_length);
 
 enum QuicRstStreamErrorCode {
   QUIC_STREAM_NO_ERROR = 0,
 
   // There was some server error which halted stream processing.
   QUIC_SERVER_ERROR_PROCESSING_STREAM,
   // We got two fin or reset offsets which did not match.
   QUIC_MULTIPLE_TERMINATION_OFFSETS,
   // We got bad payload and can not respond to it at the protocol level.
   QUIC_BAD_APPLICATION_PAYLOAD,
@@ skipping 120 matching lines @@
 // stored in memory as a little endian uint32, we need
 // to reverse the order of the bytes.
 //
 // The TAG macro is used in header files to ensure that we don't create static
 // initialisers. In normal code, the MakeQuicTag function should be used.
 #define TAG(a, b, c, d) ((d << 24) + (c << 16) + (b << 8) + a)
 const QuicTag kUnsupportedVersion = -1;
 // Each time the wire format changes, this need needs to be incremented.
 // At some point, we will actually freeze the wire format and make an official
 // version number, but this works for now.
-const QuicTag kQuicVersion1 = TAG('Q', '0', '0', '5');
+const QuicTag kQuicVersion1 = TAG('Q', '0', '0', '6');
 #undef TAG
 
 // MakeQuicTag returns a value given the four bytes. For example:
 //   MakeQuicTag('C', 'H', 'L', 'O');
 uint32 NET_EXPORT_PRIVATE MakeQuicTag(char a, char b, char c, char d);
 
 struct NET_EXPORT_PRIVATE QuicPacketPublicHeader {
   QuicPacketPublicHeader();
   explicit QuicPacketPublicHeader(const QuicPacketPublicHeader& other);
   ~QuicPacketPublicHeader();
 
   QuicPacketPublicHeader& operator=(const QuicPacketPublicHeader& other);
 
   // Universal header. All QuicPacket headers will have a guid and public flags.
   QuicGuid guid;
   QuicGuidLength guid_length;
   bool reset_flag;
   bool version_flag;
+  QuicSequenceNumberLength sequence_number_length;
   QuicTagVector versions;
 };
 
 // Header for Data or FEC packets.
 struct NET_EXPORT_PRIVATE QuicPacketHeader {
   QuicPacketHeader();
   explicit QuicPacketHeader(const QuicPacketPublicHeader& header);
 
   NET_EXPORT_PRIVATE friend std::ostream& operator<<(
       std::ostream& os, const QuicPacketHeader& s);
@@ skipping 243 matching lines @@
     QuicConnectionCloseFrame* connection_close_frame;
     QuicGoAwayFrame* goaway_frame;
   };
 };
 
 typedef std::vector<QuicFrame> QuicFrames;
 
 struct NET_EXPORT_PRIVATE QuicFecData {
   QuicFecData();
 
-  bool operator==(const QuicFecData& other) const;
-
   // The FEC group number is also the sequence number of the first
   // FEC protected packet.  The last protected packet's sequence number will
   // be one less than the sequence number of the FEC packet.
   QuicFecGroupNumber fec_group;
   base::StringPiece redundancy;
 };
 
 struct NET_EXPORT_PRIVATE QuicPacketData {
   std::string data;
 };
@@ skipping 22 matching lines @@
  private:
   const char* buffer_;
   size_t length_;
   bool owns_buffer_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicData);
 };
 
 class NET_EXPORT_PRIVATE QuicPacket : public QuicData {
  public:
-  static QuicPacket* NewDataPacket(char* buffer,
-                                   size_t length,
-                                   bool owns_buffer,
-                                   QuicGuidLength guid_length,
-                                   bool includes_version) {
-    return new QuicPacket(
-        buffer, length, owns_buffer, guid_length, includes_version, false);
+  static QuicPacket* NewDataPacket(
+      char* buffer,
+      size_t length,
+      bool owns_buffer,
+      QuicGuidLength guid_length,
+      bool includes_version,
+      QuicSequenceNumberLength sequence_number_length) {
+    return new QuicPacket(buffer, length, owns_buffer, guid_length,
+                          includes_version, sequence_number_length, false);
   }
 
-  static QuicPacket* NewFecPacket(char* buffer,
-                                  size_t length,
-                                  bool owns_buffer,
-                                  QuicGuidLength guid_length,
-                                  bool includes_version) {
-    return new QuicPacket(
-        buffer, length, owns_buffer, guid_length, includes_version, true);
+  static QuicPacket* NewFecPacket(
+      char* buffer,
+      size_t length,
+      bool owns_buffer,
+      QuicGuidLength guid_length,
+      bool includes_version,
+      QuicSequenceNumberLength sequence_number_length) {
+    return new QuicPacket(buffer, length, owns_buffer, guid_length,
+                          includes_version, sequence_number_length, true);
   }
 
   base::StringPiece FecProtectedData() const;
   base::StringPiece AssociatedData() const;
   base::StringPiece BeforePlaintext() const;
   base::StringPiece Plaintext() const;
 
   bool is_fec_packet() const { return is_fec_packet_; }
 
   bool includes_version() const { return includes_version_; }
 
   char* mutable_data() { return buffer_; }
 
  private:
   QuicPacket(char* buffer,
              size_t length,
              bool owns_buffer,
              QuicGuidLength guid_length,
              bool includes_version,
+             QuicSequenceNumberLength sequence_number_length,
              bool is_fec_packet)
       : QuicData(buffer, length, owns_buffer),
         buffer_(buffer),
         is_fec_packet_(is_fec_packet),
         guid_length_(guid_length),
-        includes_version_(includes_version) {}
+        includes_version_(includes_version),
+        sequence_number_length_(sequence_number_length) {}
 
   char* buffer_;
   const bool is_fec_packet_;
   const QuicGuidLength guid_length_;
   const bool includes_version_;
+  const QuicSequenceNumberLength sequence_number_length_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicPacket);
 };
 
 class NET_EXPORT_PRIVATE QuicEncryptedPacket : public QuicData {
  public:
   QuicEncryptedPacket(const char* buffer, size_t length)
       : QuicData(buffer, length) {}
 
   QuicEncryptedPacket(char* buffer, size_t length, bool owns_buffer)
@@ skipping 68 matching lines @@
   NET_EXPORT_PRIVATE friend std::ostream& operator<<(
       std::ostream& os, const QuicConsumedData& s);
 
   size_t bytes_consumed;
   bool fin_consumed;
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_PROTOCOL_H_