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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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 #ifndef NET_QUIC_QUIC_UNACKED_PACKET_MAP_H_ | 5 #ifndef NET_QUIC_QUIC_UNACKED_PACKET_MAP_H_ |
6 #define NET_QUIC_QUIC_UNACKED_PACKET_MAP_H_ | 6 #define NET_QUIC_QUIC_UNACKED_PACKET_MAP_H_ |
7 | 7 |
8 #include "net/base/linked_hash_map.h" | 8 #include "net/base/linked_hash_map.h" |
9 #include "net/quic/quic_protocol.h" | 9 #include "net/quic/quic_protocol.h" |
10 | 10 |
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24 // Called when a packet is retransmitted with a new sequence number. | 24 // Called when a packet is retransmitted with a new sequence number. |
25 // |old_sequence_number| will remain unacked, but will have no | 25 // |old_sequence_number| will remain unacked, but will have no |
26 // retransmittable data associated with it. |new_sequence_number| will | 26 // retransmittable data associated with it. |new_sequence_number| will |
27 // be both unacked and associated with retransmittable data. | 27 // be both unacked and associated with retransmittable data. |
28 void OnRetransmittedPacket(QuicPacketSequenceNumber old_sequence_number, | 28 void OnRetransmittedPacket(QuicPacketSequenceNumber old_sequence_number, |
29 QuicPacketSequenceNumber new_sequence_number); | 29 QuicPacketSequenceNumber new_sequence_number); |
30 | 30 |
31 // Returns true if the packet |sequence_number| is unacked. | 31 // Returns true if the packet |sequence_number| is unacked. |
32 bool IsUnacked(QuicPacketSequenceNumber sequence_number) const; | 32 bool IsUnacked(QuicPacketSequenceNumber sequence_number) const; |
33 | 33 |
34 // Returns true if the packet |sequence_number| is pending. | |
35 bool IsPending(QuicPacketSequenceNumber sequence_number) const; | |
36 | |
37 // Sets the nack count to the max of the current nack count and |min_nacks|. | 34 // Sets the nack count to the max of the current nack count and |min_nacks|. |
38 void NackPacket(QuicPacketSequenceNumber sequence_number, | 35 void NackPacket(QuicPacketSequenceNumber sequence_number, |
39 size_t min_nacks); | 36 size_t min_nacks); |
40 | 37 |
41 // Marks |sequence_number| as no longer pending. | 38 // Marks |sequence_number| as no longer pending. |
42 void SetNotPending(QuicPacketSequenceNumber sequence_number); | 39 void SetNotPending(QuicPacketSequenceNumber sequence_number); |
43 | 40 |
44 // Returns true if the unacked packet |sequence_number| has retransmittable | 41 // Returns true if the unacked packet |sequence_number| has retransmittable |
45 // frames. This will return false if the packet has been acked, if a | 42 // frames. This will return false if the packet has been acked, if a |
46 // previous transmission of this packet was ACK'd, or if this packet has been | 43 // previous transmission of this packet was ACK'd, or if this packet has been |
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65 | 62 |
66 // Returns the sum of the bytes in all pending packets. | 63 // Returns the sum of the bytes in all pending packets. |
67 QuicByteCount bytes_in_flight() const { | 64 QuicByteCount bytes_in_flight() const { |
68 return bytes_in_flight_; | 65 return bytes_in_flight_; |
69 } | 66 } |
70 | 67 |
71 // Returns the smallest sequence number of a serialized packet which has not | 68 // Returns the smallest sequence number of a serialized packet which has not |
72 // been acked by the peer. If there are no unacked packets, returns 0. | 69 // been acked by the peer. If there are no unacked packets, returns 0. |
73 QuicPacketSequenceNumber GetLeastUnackedSentPacket() const; | 70 QuicPacketSequenceNumber GetLeastUnackedSentPacket() const; |
74 | 71 |
75 // Returns the set of sequence numbers of all unacked packets. | |
76 // Test only. | |
77 SequenceNumberSet GetUnackedPackets() const; | |
78 | |
79 // Sets a packet as sent with the sent time |sent_time|. Marks the packet | 72 // Sets a packet as sent with the sent time |sent_time|. Marks the packet |
80 // as pending and tracks the |bytes_sent| if |set_pending| is true. | 73 // as pending and tracks the |bytes_sent| if |set_pending| is true. |
81 // Packets marked as pending are expected to be marked as missing when they | 74 // Packets marked as pending are expected to be marked as missing when they |
82 // don't arrive, indicating the need for retransmission. | 75 // don't arrive, indicating the need for retransmission. |
83 void SetSent(QuicPacketSequenceNumber sequence_number, | 76 void SetSent(QuicPacketSequenceNumber sequence_number, |
84 QuicTime sent_time, | 77 QuicTime sent_time, |
85 QuicByteCount bytes_sent, | 78 QuicByteCount bytes_sent, |
86 bool set_pending); | 79 bool set_pending); |
87 | 80 |
88 // Clears up to |num_to_clear| previous transmissions in order to make room | 81 // Clears up to |num_to_clear| previous transmissions in order to make room |
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144 size_t bytes_in_flight_; | 137 size_t bytes_in_flight_; |
145 // Number of outstanding crypto handshake packets. | 138 // Number of outstanding crypto handshake packets. |
146 size_t pending_crypto_packet_count_; | 139 size_t pending_crypto_packet_count_; |
147 | 140 |
148 DISALLOW_COPY_AND_ASSIGN(QuicUnackedPacketMap); | 141 DISALLOW_COPY_AND_ASSIGN(QuicUnackedPacketMap); |
149 }; | 142 }; |
150 | 143 |
151 } // namespace net | 144 } // namespace net |
152 | 145 |
153 #endif // NET_QUIC_QUIC_UNACKED_PACKET_MAP_H_ | 146 #endif // NET_QUIC_QUIC_UNACKED_PACKET_MAP_H_ |
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