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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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| 39 // Zero when the packet is serialized, non-zero once it's sent. | 39 // Zero when the packet is serialized, non-zero once it's sent. |
| 40 QuicByteCount bytes_sent; | 40 QuicByteCount bytes_sent; |
| 41 size_t nack_count; | 41 size_t nack_count; |
| 42 // Stores the sequence numbers of all transmissions of this packet. | 42 // Stores the sequence numbers of all transmissions of this packet. |
| 43 // Can never be null. | 43 // Can never be null. |
| 44 SequenceNumberSet* all_transmissions; | 44 SequenceNumberSet* all_transmissions; |
| 45 // Pending packets have not been abandoned or lost. | 45 // Pending packets have not been abandoned or lost. |
| 46 bool pending; | 46 bool pending; |
| 47 }; | 47 }; |
| 48 | 48 |
| 49 explicit QuicUnackedPacketMap(bool is_server); | 49 QuicUnackedPacketMap(); |
| 50 ~QuicUnackedPacketMap(); | 50 ~QuicUnackedPacketMap(); |
| 51 | 51 |
| 52 // Adds |serialized_packet| to the map. Does not mark it pending. | 52 // Adds |serialized_packet| to the map. Does not mark it pending. |
| 53 void AddPacket(const SerializedPacket& serialized_packet); | 53 void AddPacket(const SerializedPacket& serialized_packet); |
| 54 | 54 |
| 55 // Called when a packet is retransmitted with a new sequence number. | 55 // Called when a packet is retransmitted with a new sequence number. |
| 56 // |old_sequence_number| will remain unacked, but will have no | 56 // |old_sequence_number| will remain unacked, but will have no |
| 57 // retransmittable data associated with it. |new_sequence_number| will | 57 // retransmittable data associated with it. |new_sequence_number| will |
| 58 // be both unacked and associated with retransmittable data. | 58 // be both unacked and associated with retransmittable data. |
| 59 void OnRetransmittedPacket(QuicPacketSequenceNumber old_sequence_number, | 59 void OnRetransmittedPacket(QuicPacketSequenceNumber old_sequence_number, |
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| 82 // Returns true if there are any unacked packets. | 82 // Returns true if there are any unacked packets. |
| 83 bool HasUnackedPackets() const; | 83 bool HasUnackedPackets() const; |
| 84 | 84 |
| 85 // Returns true if there are any unacked packets which have retransmittable | 85 // Returns true if there are any unacked packets which have retransmittable |
| 86 // frames. | 86 // frames. |
| 87 bool HasUnackedRetransmittableFrames() const; | 87 bool HasUnackedRetransmittableFrames() const; |
| 88 | 88 |
| 89 // Returns the number of unacked packets which have retransmittable frames. | 89 // Returns the number of unacked packets which have retransmittable frames. |
| 90 size_t GetNumRetransmittablePackets() const; | 90 size_t GetNumRetransmittablePackets() const; |
| 91 | 91 |
| 92 // Returns the total number of bytes associated with pending packets. | |
| 93 size_t bytes_in_flight() const { | |
| 94 return bytes_in_flight_; | |
| 95 } | |
| 96 | |
| 97 // Returns the largest sequence number that has been sent. | 92 // Returns the largest sequence number that has been sent. |
| 98 QuicPacketSequenceNumber largest_sent_packet() const { | 93 QuicPacketSequenceNumber largest_sent_packet() const { |
| 99 return largest_sent_packet_; | 94 return largest_sent_packet_; |
| 100 } | 95 } |
| 101 | 96 |
| 102 // Returns the smallest sequence number of a serialized packet which has not | 97 // Returns the smallest sequence number of a serialized packet which has not |
| 103 // been acked by the peer. If there are no unacked packets, returns 0. | 98 // been acked by the peer. If there are no unacked packets, returns 0. |
| 104 QuicPacketSequenceNumber GetLeastUnackedSentPacket() const; | 99 QuicPacketSequenceNumber GetLeastUnackedSentPacket() const; |
| 105 | 100 |
| 106 // Returns the set of sequence numbers of all unacked packets. | 101 // Returns the set of sequence numbers of all unacked packets. |
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| 161 // retransmitted, this map will contain entries for both the old and the new | 156 // retransmitted, this map will contain entries for both the old and the new |
| 162 // packet. The old packet's retransmittable frames entry will be NULL, while | 157 // packet. The old packet's retransmittable frames entry will be NULL, while |
| 163 // the new packet's entry will contain the frames to retransmit. | 158 // the new packet's entry will contain the frames to retransmit. |
| 164 // If the old packet is acked before the new packet, then the old entry will | 159 // If the old packet is acked before the new packet, then the old entry will |
| 165 // be removed from the map and the new entry's retransmittable frames will be | 160 // be removed from the map and the new entry's retransmittable frames will be |
| 166 // set to NULL. | 161 // set to NULL. |
| 167 UnackedPacketMap unacked_packets_; | 162 UnackedPacketMap unacked_packets_; |
| 168 | 163 |
| 169 size_t bytes_in_flight_; | 164 size_t bytes_in_flight_; |
| 170 | 165 |
| 171 bool is_server_; | |
| 172 | |
| 173 DISALLOW_COPY_AND_ASSIGN(QuicUnackedPacketMap); | 166 DISALLOW_COPY_AND_ASSIGN(QuicUnackedPacketMap); |
| 174 }; | 167 }; |
| 175 | 168 |
| 176 } // namespace net | 169 } // namespace net |
| 177 | 170 |
| 178 #endif // NET_QUIC_QUIC_UNACKED_PACKET_MAP_H_ | 171 #endif // NET_QUIC_QUIC_UNACKED_PACKET_MAP_H_ |
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