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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 // A server side dispatcher which dispatches a given client's data to their | 5 // A server side dispatcher which dispatches a given client's data to their |
6 // stream. | 6 // stream. |
7 | 7 |
8 #ifndef NET_TOOLS_QUIC_QUIC_DISPATCHER_H_ | 8 #ifndef NET_TOOLS_QUIC_QUIC_DISPATCHER_H_ |
9 #define NET_TOOLS_QUIC_QUIC_DISPATCHER_H_ | 9 #define NET_TOOLS_QUIC_QUIC_DISPATCHER_H_ |
10 | 10 |
11 #include <memory> | 11 #include <memory> |
12 #include <unordered_map> | 12 #include <unordered_map> |
13 #include <vector> | 13 #include <vector> |
14 | 14 |
15 #include "base/macros.h" | 15 #include "base/macros.h" |
16 #include "net/base/ip_endpoint.h" | 16 #include "net/base/ip_endpoint.h" |
17 #include "net/base/linked_hash_map.h" | 17 #include "net/base/linked_hash_map.h" |
18 #include "net/quic/core/crypto/quic_compressed_certs_cache.h" | 18 #include "net/quic/core/crypto/quic_compressed_certs_cache.h" |
19 #include "net/quic/core/crypto/quic_random.h" | 19 #include "net/quic/core/crypto/quic_random.h" |
20 #include "net/quic/core/quic_blocked_writer_interface.h" | 20 #include "net/quic/core/quic_blocked_writer_interface.h" |
21 #include "net/quic/core/quic_buffered_packet_store.h" | 21 #include "net/quic/core/quic_buffered_packet_store.h" |
22 #include "net/quic/core/quic_connection.h" | 22 #include "net/quic/core/quic_connection.h" |
23 #include "net/quic/core/quic_crypto_server_stream.h" | 23 #include "net/quic/core/quic_crypto_server_stream.h" |
24 #include "net/quic/core/quic_protocol.h" | 24 #include "net/quic/core/quic_protocol.h" |
25 #include "net/quic/core/quic_server_session_base.h" | 25 #include "net/quic/core/quic_session.h" |
26 | 26 |
27 #include "net/tools/quic/quic_process_packet_interface.h" | 27 #include "net/tools/quic/quic_process_packet_interface.h" |
28 #include "net/tools/quic/quic_time_wait_list_manager.h" | 28 #include "net/tools/quic/quic_time_wait_list_manager.h" |
29 #include "net/tools/quic/stateless_rejector.h" | 29 #include "net/tools/quic/stateless_rejector.h" |
30 | 30 |
31 namespace net { | 31 namespace net { |
32 | 32 |
33 class QuicConfig; | 33 class QuicConfig; |
34 class QuicCryptoServerConfig; | 34 class QuicCryptoServerConfig; |
35 | 35 |
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82 QuicErrorCode error, | 82 QuicErrorCode error, |
83 const std::string& error_details) override; | 83 const std::string& error_details) override; |
84 | 84 |
85 // Queues the blocked writer for later resumption. | 85 // Queues the blocked writer for later resumption. |
86 void OnWriteBlocked(QuicBlockedWriterInterface* blocked_writer) override; | 86 void OnWriteBlocked(QuicBlockedWriterInterface* blocked_writer) override; |
87 | 87 |
88 // Called whenever the time wait list manager adds a new connection to the | 88 // Called whenever the time wait list manager adds a new connection to the |
89 // time-wait list. | 89 // time-wait list. |
90 void OnConnectionAddedToTimeWaitList(QuicConnectionId connection_id) override; | 90 void OnConnectionAddedToTimeWaitList(QuicConnectionId connection_id) override; |
91 | 91 |
92 void OnPacketBeingDispatchedToSession( | 92 void OnPacketBeingDispatchedToSession(QuicSession* session) override {} |
93 QuicServerSessionBase* session) override {} | |
94 | 93 |
95 using SessionMap = std::unordered_map<QuicConnectionId, | 94 using SessionMap = |
96 std::unique_ptr<QuicServerSessionBase>>; | 95 std::unordered_map<QuicConnectionId, std::unique_ptr<QuicSession>>; |
97 | 96 |
98 const SessionMap& session_map() const { return session_map_; } | 97 const SessionMap& session_map() const { return session_map_; } |
99 | 98 |
100 // Deletes all sessions on the closed session list and clears the list. | 99 // Deletes all sessions on the closed session list and clears the list. |
101 virtual void DeleteSessions(); | 100 virtual void DeleteSessions(); |
102 | 101 |
103 // The largest packet number we expect to receive with a connection | 102 // The largest packet number we expect to receive with a connection |
104 // ID for a connection that is not established yet. The current design will | 103 // ID for a connection that is not established yet. The current design will |
105 // send a handshake and then up to 50 or so data packets, and then it may | 104 // send a handshake and then up to 50 or so data packets, and then it may |
106 // resend the handshake packet up to 10 times. (Retransmitted packets are | 105 // resend the handshake packet up to 10 times. (Retransmitted packets are |
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151 QuicBufferedPacketStore::BufferedPacketList | 150 QuicBufferedPacketStore::BufferedPacketList |
152 early_arrived_packets) override; | 151 early_arrived_packets) override; |
153 | 152 |
154 // Create connections for previously buffered CHLOs as many as allowed. | 153 // Create connections for previously buffered CHLOs as many as allowed. |
155 virtual void ProcessBufferedChlos(size_t max_connections_to_create); | 154 virtual void ProcessBufferedChlos(size_t max_connections_to_create); |
156 | 155 |
157 // Return true if there is CHLO buffered. | 156 // Return true if there is CHLO buffered. |
158 virtual bool HasChlosBuffered() const; | 157 virtual bool HasChlosBuffered() const; |
159 | 158 |
160 protected: | 159 protected: |
161 virtual QuicServerSessionBase* CreateQuicSession( | 160 virtual QuicSession* CreateQuicSession(QuicConnectionId connection_id, |
162 QuicConnectionId connection_id, | 161 const IPEndPoint& client_address) = 0; |
163 const IPEndPoint& client_address) = 0; | |
164 | 162 |
165 // Called when a connection is rejected statelessly. | 163 // Called when a connection is rejected statelessly. |
166 virtual void OnConnectionRejectedStatelessly(); | 164 virtual void OnConnectionRejectedStatelessly(); |
167 | 165 |
168 // Called when a connection is closed statelessly. | 166 // Called when a connection is closed statelessly. |
169 virtual void OnConnectionClosedStatelessly(QuicErrorCode error); | 167 virtual void OnConnectionClosedStatelessly(QuicErrorCode error); |
170 | 168 |
171 // Returns true if cheap stateless rejection should be attempted. | 169 // Returns true if cheap stateless rejection should be attempted. |
172 virtual bool ShouldAttemptCheapStatelessRejection(); | 170 virtual bool ShouldAttemptCheapStatelessRejection(); |
173 | 171 |
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286 // Attempts to reject the connection statelessly, if stateless rejects are | 284 // Attempts to reject the connection statelessly, if stateless rejects are |
287 // possible and if the current packet contains a CHLO message. Determines a | 285 // possible and if the current packet contains a CHLO message. Determines a |
288 // fate which describes what subsequent processing should be performed on the | 286 // fate which describes what subsequent processing should be performed on the |
289 // packets, like ValidityChecks, and invokes ProcessUnauthenticatedHeaderFate. | 287 // packets, like ValidityChecks, and invokes ProcessUnauthenticatedHeaderFate. |
290 void MaybeRejectStatelessly(QuicConnectionId connection_id, | 288 void MaybeRejectStatelessly(QuicConnectionId connection_id, |
291 const QuicPacketHeader& header); | 289 const QuicPacketHeader& header); |
292 | 290 |
293 // Deliver |packets| to |session| for further processing. | 291 // Deliver |packets| to |session| for further processing. |
294 void DeliverPacketsToSession( | 292 void DeliverPacketsToSession( |
295 const std::list<QuicBufferedPacketStore::BufferedPacket>& packets, | 293 const std::list<QuicBufferedPacketStore::BufferedPacket>& packets, |
296 QuicServerSessionBase* session); | 294 QuicSession* session); |
297 | 295 |
298 // Perform the appropriate actions on the current packet based on |fate| - | 296 // Perform the appropriate actions on the current packet based on |fate| - |
299 // either process, buffer, or drop it. | 297 // either process, buffer, or drop it. |
300 void ProcessUnauthenticatedHeaderFate(QuicPacketFate fate, | 298 void ProcessUnauthenticatedHeaderFate(QuicPacketFate fate, |
301 QuicConnectionId connection_id, | 299 QuicConnectionId connection_id, |
302 QuicPacketNumber packet_number); | 300 QuicPacketNumber packet_number); |
303 | 301 |
304 // Invoked when StatelessRejector::Process completes. | 302 // Invoked when StatelessRejector::Process completes. |
305 void OnStatelessRejectorProcessDone( | 303 void OnStatelessRejectorProcessDone( |
306 std::unique_ptr<StatelessRejector> rejector, | 304 std::unique_ptr<StatelessRejector> rejector, |
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330 QuicCompressedCertsCache compressed_certs_cache_; | 328 QuicCompressedCertsCache compressed_certs_cache_; |
331 | 329 |
332 // The list of connections waiting to write. | 330 // The list of connections waiting to write. |
333 WriteBlockedList write_blocked_list_; | 331 WriteBlockedList write_blocked_list_; |
334 | 332 |
335 SessionMap session_map_; | 333 SessionMap session_map_; |
336 | 334 |
337 // Entity that manages connection_ids in time wait state. | 335 // Entity that manages connection_ids in time wait state. |
338 std::unique_ptr<QuicTimeWaitListManager> time_wait_list_manager_; | 336 std::unique_ptr<QuicTimeWaitListManager> time_wait_list_manager_; |
339 | 337 |
340 // The list of closed but not-yet-deleted sessions. | 338 // The std::list of closed but not-yet-deleted sessions. |
341 std::vector<std::unique_ptr<QuicServerSessionBase>> closed_session_list_; | 339 std::vector<std::unique_ptr<QuicSession>> closed_session_list_; |
342 | 340 |
343 // The helper used for all connections. | 341 // The helper used for all connections. |
344 std::unique_ptr<QuicConnectionHelperInterface> helper_; | 342 std::unique_ptr<QuicConnectionHelperInterface> helper_; |
345 | 343 |
346 // The helper used for all sessions. | 344 // The helper used for all sessions. |
347 std::unique_ptr<QuicCryptoServerStream::Helper> session_helper_; | 345 std::unique_ptr<QuicCryptoServerStream::Helper> session_helper_; |
348 | 346 |
349 // Creates alarms. | 347 // Creates alarms. |
350 std::unique_ptr<QuicAlarmFactory> alarm_factory_; | 348 std::unique_ptr<QuicAlarmFactory> alarm_factory_; |
351 | 349 |
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382 // A backward counter of how many new sessions can be create within current | 380 // A backward counter of how many new sessions can be create within current |
383 // event loop. When reaches 0, it means can't create sessions for now. | 381 // event loop. When reaches 0, it means can't create sessions for now. |
384 int16_t new_sessions_allowed_per_event_loop_; | 382 int16_t new_sessions_allowed_per_event_loop_; |
385 | 383 |
386 DISALLOW_COPY_AND_ASSIGN(QuicDispatcher); | 384 DISALLOW_COPY_AND_ASSIGN(QuicDispatcher); |
387 }; | 385 }; |
388 | 386 |
389 } // namespace net | 387 } // namespace net |
390 | 388 |
391 #endif // NET_TOOLS_QUIC_QUIC_DISPATCHER_H_ | 389 #endif // NET_TOOLS_QUIC_QUIC_DISPATCHER_H_ |
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