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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 // Handles packets for connection_ids in time wait state by discarding the | 5 // Handles packets for connection_ids in time wait state by discarding the |
6 // packet and sending the clients a public reset packet with exponential | 6 // packet and sending the clients a public reset packet with exponential |
7 // backoff. | 7 // backoff. |
8 | 8 |
9 #ifndef NET_TOOLS_QUIC_QUIC_TIME_WAIT_LIST_MANAGER_H_ | 9 #ifndef NET_TOOLS_QUIC_QUIC_TIME_WAIT_LIST_MANAGER_H_ |
10 #define NET_TOOLS_QUIC_QUIC_TIME_WAIT_LIST_MANAGER_H_ | 10 #define NET_TOOLS_QUIC_QUIC_TIME_WAIT_LIST_MANAGER_H_ |
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45 // connection_id. | 45 // connection_id. |
46 class QuicTimeWaitListManager : public QuicBlockedWriterInterface { | 46 class QuicTimeWaitListManager : public QuicBlockedWriterInterface { |
47 public: | 47 public: |
48 // writer - the entity that writes to the socket. (Owned by the dispatcher) | 48 // writer - the entity that writes to the socket. (Owned by the dispatcher) |
49 // visitor - the entity that manages blocked writers. (The dispatcher) | 49 // visitor - the entity that manages blocked writers. (The dispatcher) |
50 // epoll_server - used to run clean up alarms. (Owned by the dispatcher) | 50 // epoll_server - used to run clean up alarms. (Owned by the dispatcher) |
51 QuicTimeWaitListManager(QuicPacketWriter* writer, | 51 QuicTimeWaitListManager(QuicPacketWriter* writer, |
52 QuicServerSessionVisitor* visitor, | 52 QuicServerSessionVisitor* visitor, |
53 EpollServer* epoll_server, | 53 EpollServer* epoll_server, |
54 const QuicVersionVector& supported_versions); | 54 const QuicVersionVector& supported_versions); |
55 virtual ~QuicTimeWaitListManager(); | 55 ~QuicTimeWaitListManager() override; |
56 | 56 |
57 // Adds the given connection_id to time wait state for kTimeWaitPeriod. | 57 // Adds the given connection_id to time wait state for kTimeWaitPeriod. |
58 // Henceforth, any packet bearing this connection_id should not be processed | 58 // Henceforth, any packet bearing this connection_id should not be processed |
59 // while the connection_id remains in this list. If a non-nullptr | 59 // while the connection_id remains in this list. If a non-nullptr |
60 // |close_packet| is provided, it is sent again when packets are received for | 60 // |close_packet| is provided, it is sent again when packets are received for |
61 // added connection_ids. If nullptr, a public reset packet is sent with the | 61 // added connection_ids. If nullptr, a public reset packet is sent with the |
62 // specified |version|. DCHECKs that connection_id is not already on the list. | 62 // specified |version|. DCHECKs that connection_id is not already on the list. |
63 void AddConnectionIdToTimeWait(QuicConnectionId connection_id, | 63 void AddConnectionIdToTimeWait(QuicConnectionId connection_id, |
64 QuicVersion version, | 64 QuicVersion version, |
65 QuicEncryptedPacket* close_packet); // Owned. | 65 QuicEncryptedPacket* close_packet); // Owned. |
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76 // state. virtual to override in tests. | 76 // state. virtual to override in tests. |
77 virtual void ProcessPacket(const IPEndPoint& server_address, | 77 virtual void ProcessPacket(const IPEndPoint& server_address, |
78 const IPEndPoint& client_address, | 78 const IPEndPoint& client_address, |
79 QuicConnectionId connection_id, | 79 QuicConnectionId connection_id, |
80 QuicPacketSequenceNumber sequence_number, | 80 QuicPacketSequenceNumber sequence_number, |
81 const QuicEncryptedPacket& packet); | 81 const QuicEncryptedPacket& packet); |
82 | 82 |
83 // Called by the dispatcher when the underlying socket becomes writable again, | 83 // Called by the dispatcher when the underlying socket becomes writable again, |
84 // since we might need to send pending public reset packets which we didn't | 84 // since we might need to send pending public reset packets which we didn't |
85 // send because the underlying socket was write blocked. | 85 // send because the underlying socket was write blocked. |
86 virtual void OnCanWrite() override; | 86 void OnCanWrite() override; |
87 | 87 |
88 // Used to delete connection_id entries that have outlived their time wait | 88 // Used to delete connection_id entries that have outlived their time wait |
89 // period. | 89 // period. |
90 void CleanUpOldConnectionIds(); | 90 void CleanUpOldConnectionIds(); |
91 | 91 |
92 // Given a ConnectionId that exists in the time wait list, returns the | 92 // Given a ConnectionId that exists in the time wait list, returns the |
93 // QuicVersion associated with it. | 93 // QuicVersion associated with it. |
94 QuicVersion GetQuicVersionFromConnectionId(QuicConnectionId connection_id); | 94 QuicVersion GetQuicVersionFromConnectionId(QuicConnectionId connection_id); |
95 | 95 |
96 protected: | 96 protected: |
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172 // Interface that manages blocked writers. | 172 // Interface that manages blocked writers. |
173 QuicServerSessionVisitor* visitor_; | 173 QuicServerSessionVisitor* visitor_; |
174 | 174 |
175 DISALLOW_COPY_AND_ASSIGN(QuicTimeWaitListManager); | 175 DISALLOW_COPY_AND_ASSIGN(QuicTimeWaitListManager); |
176 }; | 176 }; |
177 | 177 |
178 } // namespace tools | 178 } // namespace tools |
179 } // namespace net | 179 } // namespace net |
180 | 180 |
181 #endif // NET_TOOLS_QUIC_QUIC_TIME_WAIT_LIST_MANAGER_H_ | 181 #endif // NET_TOOLS_QUIC_QUIC_TIME_WAIT_LIST_MANAGER_H_ |
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