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1 // Copyright (c) 2014 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 // | |
5 // Implements Proportional Rate Reduction (PRR) per RFC 6937. | |
6 | |
7 #ifndef NET_QUIC_CONGESTION_CONTROL_PRR_SENDER_H_ | |
8 #define NET_QUIC_CONGESTION_CONTROL_PRR_SENDER_H_ | |
9 | |
10 #include "net/quic/quic_bandwidth.h" | |
11 #include "net/quic/quic_time.h" | |
12 | |
13 namespace net { | |
14 | |
15 class NET_EXPORT_PRIVATE PrrSender { | |
16 public: | |
17 PrrSender(); | |
18 // OnPacketLost should be called on the first loss that triggers a recovery | |
19 // period and all other methods in this class should only be called when in | |
20 // recovery. | |
21 void OnPacketLost(QuicByteCount bytes_in_flight); | |
22 void OnPacketSent(QuicByteCount sent_bytes); | |
23 void OnPacketAcked(QuicByteCount acked_bytes); | |
24 QuicTime::Delta TimeUntilSend(QuicByteCount congestion_window, | |
25 QuicByteCount bytes_in_flight, | |
26 QuicPacketCount slowstart_threshold) | |
27 const; | |
28 | |
29 private: | |
30 // Bytes sent and acked since the last loss event. | |
31 // |bytes_sent_since_loss_| is the same as "prr_out_" in RFC 6937, | |
32 // and |bytes_delivered_since_loss_| is the same as "prr_delivered_". | |
33 QuicByteCount bytes_sent_since_loss_; | |
34 QuicByteCount bytes_delivered_since_loss_; | |
35 size_t ack_count_since_loss_; | |
36 | |
37 // The congestion window before the last loss event. | |
38 QuicByteCount bytes_in_flight_before_loss_; | |
39 }; | |
40 | |
41 } // namespace net | |
42 | |
43 #endif // NET_QUIC_CONGESTION_CONTROL_PRR_SENDER_H_ | |
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