Stub for BBRv2, based on TCP congestion feedback frames.

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 39 matching lines @@
 typedef uint32 QuicPriority;
 
 // TODO(rch): Consider Quic specific names for these constants.
 // Default and initial maximum size in bytes of a QUIC packet.
 const QuicByteCount kDefaultMaxPacketSize = 1200;
 // The maximum packet size of any QUIC packet, based on ethernet's max size,
 // minus the IP and UDP headers. IPv6 has a 40 byte header, UPD adds an
 // additional 8 bytes.  This is a total overhead of 48 bytes.  Ethernet's
 // max packet size is 1500 bytes,  1500 - 48 = 1452.
 const QuicByteCount kMaxPacketSize = 1452;
+// Default maximum packet size used in Linux TCP implementations.
+const QuicByteCount kDefaultTCPMSS = 1460;
 
 // Maximum size of the initial congestion window in packets.
 const size_t kDefaultInitialWindow = 10;
 const uint32 kMaxInitialWindow = 100;
 
 // Default size of initial flow control window.
 const uint32 kDefaultFlowControlSendWindow = 16 * 1024;  // 16 KB
 
 // Maximum size of the congestion window, in packets, for TCP congestion control
 // algorithms.
@@ skipping 612 matching lines @@
   ReceivedPacketInfo received_info;
 };
 
 // Defines for all types of congestion feedback that will be negotiated in QUIC,
 // kTCP MUST be supported by all QUIC implementations to guarantee 100%
 // compatibility.
 enum CongestionFeedbackType {
   kTCP,  // Used to mimic TCP.
   kInterArrival,  // Use additional inter arrival information.
   kFixRate,  // Provided for testing.
+  kTCPBBR,  // BBR implementation based on TCP congestion feedback.
 };
 
 enum LossDetectionType {
   kNack,  // Used to mimic TCP's loss detection.
   kTime,  // Time based loss detection.
 };
 
 struct NET_EXPORT_PRIVATE CongestionFeedbackMessageTCP {
   CongestionFeedbackMessageTCP();
 
@@ skipping 369 matching lines @@
   WriteStatus status;
   union {
     int bytes_written;  // only valid when status is OK
     int error_code;  // only valid when status is ERROR
   };
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_PROTOCOL_H_