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Unified Diff: net/quic/quic_received_packet_manager.h

Issue 992733002: Remove //net (except for Android test stuff) and sdch (Closed) Base URL: git@github.com:domokit/mojo.git@master
Patch Set: Created 5 years, 9 months ago
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Index: net/quic/quic_received_packet_manager.h
diff --git a/net/quic/quic_received_packet_manager.h b/net/quic/quic_received_packet_manager.h
deleted file mode 100644
index b16af55a724b4a8947a425218ea6acc6316c495b..0000000000000000000000000000000000000000
--- a/net/quic/quic_received_packet_manager.h
+++ /dev/null
@@ -1,177 +0,0 @@
-// Copyright 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.
-//
-// Manages the packet entropy calculation for both sent and received packets
-// for a connection.
-
-#ifndef NET_QUIC_QUIC_RECEIVED_PACKET_MANAGER_H_
-#define NET_QUIC_QUIC_RECEIVED_PACKET_MANAGER_H_
-
-#include <deque>
-
-#include "net/quic/quic_config.h"
-#include "net/quic/quic_framer.h"
-#include "net/quic/quic_protocol.h"
-
-namespace net {
-
-namespace test {
-class EntropyTrackerPeer;
-class QuicConnectionPeer;
-class QuicReceivedPacketManagerPeer;
-} // namespace test
-
-struct QuicConnectionStats;
-
-// Records all received packets by a connection and tracks their entropy.
-// Also calculates the correct entropy for the framer when it truncates an ack
-// frame being serialized.
-class NET_EXPORT_PRIVATE QuicReceivedPacketManager :
- public QuicReceivedEntropyHashCalculatorInterface {
- public:
- class NET_EXPORT_PRIVATE EntropyTracker {
- public:
- EntropyTracker();
- ~EntropyTracker();
-
- // Compute the XOR of the entropy of all received packets up to
- // and including sequence_number.
- // Requires that either:
- // sequence_number == largest_observed_
- // or:
- // sequence_number > first_gap_ &&
- // sequence_number < largest_observed_ &&
- // sequence_number in packets_entropy_
- QuicPacketEntropyHash EntropyHash(
- QuicPacketSequenceNumber sequence_number) const;
-
- // Record the received entropy hash against |sequence_number|.
- // Performs garbage collection to advance first_gap_ if
- // sequence_number == first_gap_.
- void RecordPacketEntropyHash(QuicPacketSequenceNumber sequence_number,
- QuicPacketEntropyHash entropy_hash);
-
- // Sets the entropy hash up to but not including a sequence number based
- // on the hash provided by a StopWaiting frame. Clears older packet
- // entropy entries and performs garbage collection up to the first gap.
- void SetCumulativeEntropyUpTo(QuicPacketSequenceNumber sequence_number,
- QuicPacketEntropyHash entropy_hash);
-
- size_t size() const { return packets_entropy_.size(); }
-
- private:
- friend class test::EntropyTrackerPeer;
-
- // A deque indexed by sequence number storing the packet's hash and whether
- // a hash was recorded for that sequence number.
- typedef std::deque<std::pair<QuicPacketEntropyHash, bool> >
- ReceivedEntropyHashes;
-
- // Recomputes first_gap_ and removes packets_entropy_ entries that are no
- // longer needed to compute EntropyHash.
- void AdvanceFirstGapAndGarbageCollectEntropyMap();
-
- // Map of received sequence numbers to their corresponding entropy.
- // Stores an entry for every received packet whose sequence_number is larger
- // than first_gap_. Packets without the entropy bit set have an entropy
- // value of 0.
- ReceivedEntropyHashes packets_entropy_;
-
- // Cumulative hash of entropy of all received packets.
- QuicPacketEntropyHash packets_entropy_hash_;
-
- // Sequence number of the first packet that we do not know the entropy of.
- // If there are no gaps in the received packet sequence,
- // packets_entropy_ will be empty and first_gap_ will be equal to
- // 'largest_observed_ + 1' since that's the first packet for which
- // entropy is unknown. If there are gaps, packets_entropy_ will
- // contain entries for all received packets with sequence_number >
- // first_gap_.
- QuicPacketSequenceNumber first_gap_;
-
- // Sequence number of the largest observed packet.
- QuicPacketSequenceNumber largest_observed_;
-
- DISALLOW_COPY_AND_ASSIGN(EntropyTracker);
- };
-
- explicit QuicReceivedPacketManager(QuicConnectionStats* stats);
- ~QuicReceivedPacketManager() override;
-
- // Updates the internal state concerning which packets have been received.
- // bytes: the packet size in bytes including Quic Headers.
- // header: the packet header.
- // timestamp: the arrival time of the packet.
- void RecordPacketReceived(QuicByteCount bytes,
- const QuicPacketHeader& header,
- QuicTime receipt_time);
-
- void RecordPacketRevived(QuicPacketSequenceNumber sequence_number);
-
- // Checks whether |sequence_number| is missing and less than largest observed.
- bool IsMissing(QuicPacketSequenceNumber sequence_number);
-
- // Checks if we're still waiting for the packet with |sequence_number|.
- bool IsAwaitingPacket(QuicPacketSequenceNumber sequence_number);
-
- // Update the |ack_frame| for an outgoing ack.
- void UpdateReceivedPacketInfo(QuicAckFrame* ack_frame,
- QuicTime approximate_now);
-
- // QuicReceivedEntropyHashCalculatorInterface
- // Called by QuicFramer, when the outgoing ack gets truncated, to recalculate
- // the received entropy hash for the truncated ack frame.
- QuicPacketEntropyHash EntropyHash(
- QuicPacketSequenceNumber sequence_number) const override;
-
- // Updates internal state based on |stop_waiting|.
- void UpdatePacketInformationSentByPeer(
- const QuicStopWaitingFrame& stop_waiting);
-
- // Returns true when there are new missing packets to be reported within 3
- // packets of the largest observed.
- bool HasNewMissingPackets() const;
-
- // Returns the number of packets being tracked in the EntropyTracker.
- size_t NumTrackedPackets() const;
-
- QuicPacketSequenceNumber peer_least_packet_awaiting_ack() {
- return peer_least_packet_awaiting_ack_;
- }
-
- private:
- friend class test::QuicConnectionPeer;
- friend class test::QuicReceivedPacketManagerPeer;
-
- // Deletes all missing packets before least unacked. The connection won't
- // process any packets with sequence number before |least_unacked| that it
- // received after this call. Returns true if there were missing packets before
- // |least_unacked| unacked, false otherwise.
- bool DontWaitForPacketsBefore(QuicPacketSequenceNumber least_unacked);
-
- // Tracks entropy hashes of received packets.
- EntropyTracker entropy_tracker_;
-
- // Least sequence number of the the packet sent by the peer for which it
- // hasn't received an ack.
- QuicPacketSequenceNumber peer_least_packet_awaiting_ack_;
-
- // Received packet information used to produce acks.
- QuicAckFrame ack_frame_;
-
- // The time we received the largest_observed sequence number, or zero if
- // no sequence numbers have been received since UpdateReceivedPacketInfo.
- // Needed for calculating delta_time_largest_observed.
- QuicTime time_largest_observed_;
-
- QuicConnectionStats* stats_;
-
- PacketTimeList received_packet_times_;
-
- DISALLOW_COPY_AND_ASSIGN(QuicReceivedPacketManager);
-};
-
-} // namespace net
-
-#endif // NET_QUIC_QUIC_RECEIVED_PACKET_MANAGER_H_
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