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| 1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 // | 4 // |
| 5 // Manages the packet entropy calculation for both sent and received packets | 5 // Manages the packet entropy calculation for both sent and received packets |
| 6 // for a connection. | 6 // for a connection. |
| 7 | 7 |
| 8 #ifndef NET_QUIC_QUIC_SENT_ENTROPY_MANAGER_H_ | 8 #ifndef NET_QUIC_QUIC_SENT_ENTROPY_MANAGER_H_ |
| 9 #define NET_QUIC_QUIC_SENT_ENTROPY_MANAGER_H_ | 9 #define NET_QUIC_QUIC_SENT_ENTROPY_MANAGER_H_ |
| 10 | 10 |
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| 34 // up to |sequence_number| removing sequence numbers from |missing_packets|. | 34 // up to |sequence_number| removing sequence numbers from |missing_packets|. |
| 35 bool IsValidEntropy(QuicPacketSequenceNumber sequence_number, | 35 bool IsValidEntropy(QuicPacketSequenceNumber sequence_number, |
| 36 const SequenceNumberSet& missing_packets, | 36 const SequenceNumberSet& missing_packets, |
| 37 QuicPacketEntropyHash entropy_hash) const; | 37 QuicPacketEntropyHash entropy_hash) const; |
| 38 | 38 |
| 39 // Removes not required entries from |packets_entropy_| before | 39 // Removes not required entries from |packets_entropy_| before |
| 40 // |sequence_number|. | 40 // |sequence_number|. |
| 41 void ClearEntropyBefore(QuicPacketSequenceNumber sequence_number); | 41 void ClearEntropyBefore(QuicPacketSequenceNumber sequence_number); |
| 42 | 42 |
| 43 private: | 43 private: |
| 44 typedef linked_hash_map<QuicPacketSequenceNumber, | 44 typedef linked_hash_map< |
| 45 std::pair<QuicPacketEntropyHash, | 45 QuicPacketSequenceNumber, |
| 46 QuicPacketEntropyHash> > SentEntropyMap; | 46 std::pair<QuicPacketEntropyHash, QuicPacketEntropyHash> > SentEntropyMap; |
| 47 | 47 |
| 48 // Linked hash map from sequence numbers to the sent entropy hash up to the | 48 // Linked hash map from sequence numbers to the sent entropy hash up to the |
| 49 // sequence number in the key. | 49 // sequence number in the key. |
| 50 SentEntropyMap packets_entropy_; | 50 SentEntropyMap packets_entropy_; |
| 51 | 51 |
| 52 // Cumulative hash of entropy of all sent packets. | 52 // Cumulative hash of entropy of all sent packets. |
| 53 QuicPacketEntropyHash packets_entropy_hash_; | 53 QuicPacketEntropyHash packets_entropy_hash_; |
| 54 | 54 |
| 55 DISALLOW_COPY_AND_ASSIGN(QuicSentEntropyManager); | 55 DISALLOW_COPY_AND_ASSIGN(QuicSentEntropyManager); |
| 56 }; | 56 }; |
| 57 | 57 |
| 58 } // namespace net | 58 } // namespace net |
| 59 | 59 |
| 60 #endif // NET_QUIC_QUIC_SENT_ENTROPY_MANAGER_H_ | 60 #endif // NET_QUIC_QUIC_SENT_ENTROPY_MANAGER_H_ |
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