1 // Copyright (c) 2013 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.
5 #ifndef NET_QUIC_QUIC_CONFIG_H_
6 #define NET_QUIC_QUIC_CONFIG_H_
10 #include "base/basictypes.h"
11 #include "net/quic/quic_protocol.h"
12 #include "net/quic/quic_time.h"
20 class CryptoHandshakeMessage;
22 // Describes whether or not a given QuicTag is required or optional in the
24 enum QuicConfigPresence {
25 // This negotiable value can be absent from the handshake message. Default
26 // value is selected as the negotiated value in such a case.
28 // This negotiable value is required in the handshake message otherwise the
29 // Process*Hello function returns an error.
33 // Whether the CryptoHandshakeMessage is from the client or server.
39 // An abstract base class that stores a value that can be sent in CHLO/SHLO
40 // message. These values can be OPTIONAL or REQUIRED, depending on |presence_|.
41 class NET_EXPORT_PRIVATE QuicConfigValue {
43 QuicConfigValue(QuicTag tag, QuicConfigPresence presence);
44 virtual ~QuicConfigValue();
46 // Serialises tag name and value(s) to |out|.
47 virtual void ToHandshakeMessage(CryptoHandshakeMessage* out) const = 0;
49 // Selects a mutually acceptable value from those offered in |peer_hello|
50 // and those defined in the subclass.
51 virtual QuicErrorCode ProcessPeerHello(
52 const CryptoHandshakeMessage& peer_hello,
54 std::string* error_details) = 0;
58 const QuicConfigPresence presence_;
61 class NET_EXPORT_PRIVATE QuicNegotiableValue : public QuicConfigValue {
63 QuicNegotiableValue(QuicTag tag, QuicConfigPresence presence);
64 ~QuicNegotiableValue() override;
66 bool negotiated() const {
71 void set_negotiated(bool negotiated) { negotiated_ = negotiated; }
77 class NET_EXPORT_PRIVATE QuicNegotiableUint32 : public QuicNegotiableValue {
79 // Default and max values default to 0.
80 QuicNegotiableUint32(QuicTag name, QuicConfigPresence presence);
81 ~QuicNegotiableUint32() override;
83 // Sets the maximum possible value that can be achieved after negotiation and
84 // also the default values to be assumed if PRESENCE_OPTIONAL and the *HLO msg
85 // doesn't contain a value corresponding to |name_|. |max| is serialised via
86 // ToHandshakeMessage call if |negotiated_| is false.
87 void set(uint32 max, uint32 default_value);
89 // Returns the value negotiated if |negotiated_| is true, otherwise returns
90 // default_value_ (used to set default values before negotiation finishes).
91 uint32 GetUint32() const;
93 // Serialises |name_| and value to |out|. If |negotiated_| is true then
94 // |negotiated_value_| is serialised, otherwise |max_value_| is serialised.
95 void ToHandshakeMessage(CryptoHandshakeMessage* out) const override;
97 // Sets |negotiated_value_| to the minimum of |max_value_| and the
98 // corresponding value from |peer_hello|. If the corresponding value is
99 // missing and PRESENCE_OPTIONAL then |negotiated_value_| is set to
101 QuicErrorCode ProcessPeerHello(const CryptoHandshakeMessage& peer_hello,
102 HelloType hello_type,
103 std::string* error_details) override;
107 uint32 default_value_;
108 uint32 negotiated_value_;
111 class NET_EXPORT_PRIVATE QuicNegotiableTag : public QuicNegotiableValue {
113 QuicNegotiableTag(QuicTag name, QuicConfigPresence presence);
114 ~QuicNegotiableTag() override;
116 // Sets the possible values that |negotiated_tag_| can take after negotiation
117 // and the default value that |negotiated_tag_| takes if OPTIONAL and *HLO
118 // msg doesn't contain tag |name_|.
119 void set(const QuicTagVector& possible_values, QuicTag default_value);
121 // Returns the negotiated tag if |negotiated_| is true, otherwise returns
122 // |default_value_| (used to set default values before negotiation finishes).
123 QuicTag GetTag() const;
125 // Serialises |name_| and vector (either possible or negotiated) to |out|. If
126 // |negotiated_| is true then |negotiated_tag_| is serialised, otherwise
127 // |possible_values_| is serialised.
128 void ToHandshakeMessage(CryptoHandshakeMessage* out) const override;
130 // Selects the tag common to both tags in |client_hello| for |name_| and
131 // |possible_values_| with preference to tag in |possible_values_|. The
132 // selected tag is set as |negotiated_tag_|.
133 QuicErrorCode ProcessPeerHello(const CryptoHandshakeMessage& peer_hello,
134 HelloType hello_type,
135 std::string* error_details) override;
138 // Reads the vector corresponding to |name_| from |msg| into |out|. If the
139 // |name_| is absent in |msg| and |presence_| is set to OPTIONAL |out| is set
140 // to |possible_values_|.
141 QuicErrorCode ReadVector(const CryptoHandshakeMessage& msg,
144 std::string* error_details) const;
146 QuicTag negotiated_tag_;
147 QuicTagVector possible_values_;
148 QuicTag default_value_;
151 // Stores uint32 from CHLO or SHLO messages that are not negotiated.
152 class NET_EXPORT_PRIVATE QuicFixedUint32 : public QuicConfigValue {
154 QuicFixedUint32(QuicTag name, QuicConfigPresence presence);
155 ~QuicFixedUint32() override;
157 bool HasSendValue() const;
159 uint32 GetSendValue() const;
161 void SetSendValue(uint32 value);
163 bool HasReceivedValue() const;
165 uint32 GetReceivedValue() const;
167 void SetReceivedValue(uint32 value);
169 // If has_send_value is true, serialises |tag_| and |send_value_| to |out|.
170 void ToHandshakeMessage(CryptoHandshakeMessage* out) const override;
172 // Sets |value_| to the corresponding value from |peer_hello_| if it exists.
173 QuicErrorCode ProcessPeerHello(const CryptoHandshakeMessage& peer_hello,
174 HelloType hello_type,
175 std::string* error_details) override;
179 bool has_send_value_;
180 uint32 receive_value_;
181 bool has_receive_value_;
184 // Stores tag from CHLO or SHLO messages that are not negotiated.
185 class NET_EXPORT_PRIVATE QuicFixedTag : public QuicConfigValue {
187 QuicFixedTag(QuicTag name, QuicConfigPresence presence);
188 ~QuicFixedTag() override;
190 bool HasSendValue() const;
192 QuicTag GetSendValue() const;
194 void SetSendValue(QuicTag value);
196 bool HasReceivedValue() const;
198 QuicTag GetReceivedValue() const;
200 void SetReceivedValue(QuicTag value);
202 // If has_send_value is true, serialises |tag_| and |send_value_| to |out|.
203 void ToHandshakeMessage(CryptoHandshakeMessage* out) const override;
205 // Sets |value_| to the corresponding value from |client_hello_| if it exists.
206 QuicErrorCode ProcessPeerHello(const CryptoHandshakeMessage& peer_hello,
207 HelloType hello_type,
208 std::string* error_details) override;
212 bool has_send_value_;
213 QuicTag receive_value_;
214 bool has_receive_value_;
217 // Stores tag from CHLO or SHLO messages that are not negotiated.
218 class NET_EXPORT_PRIVATE QuicFixedTagVector : public QuicConfigValue {
220 QuicFixedTagVector(QuicTag name, QuicConfigPresence presence);
221 ~QuicFixedTagVector() override;
223 bool HasSendValues() const;
225 QuicTagVector GetSendValues() const;
227 void SetSendValues(const QuicTagVector& values);
229 bool HasReceivedValues() const;
231 QuicTagVector GetReceivedValues() const;
233 void SetReceivedValues(const QuicTagVector& values);
235 // If has_send_value is true, serialises |tag_vector_| and |send_value_| to
237 void ToHandshakeMessage(CryptoHandshakeMessage* out) const override;
239 // Sets |receive_values_| to the corresponding value from |client_hello_| if
241 QuicErrorCode ProcessPeerHello(const CryptoHandshakeMessage& peer_hello,
242 HelloType hello_type,
243 std::string* error_details) override;
246 QuicTagVector send_values_;
247 bool has_send_values_;
248 QuicTagVector receive_values_;
249 bool has_receive_values_;
252 // QuicConfig contains non-crypto configuration options that are negotiated in
253 // the crypto handshake.
254 class NET_EXPORT_PRIVATE QuicConfig {
259 void SetCongestionFeedback(const QuicTagVector& congestion_feedback,
260 QuicTag default_congestion_feedback);
262 QuicTag CongestionFeedback() const;
264 void SetConnectionOptionsToSend(const QuicTagVector& connection_options);
266 bool HasReceivedConnectionOptions() const;
268 QuicTagVector ReceivedConnectionOptions() const;
270 bool HasSendConnectionOptions() const;
272 QuicTagVector SendConnectionOptions() const;
274 void SetIdleConnectionStateLifetime(
275 QuicTime::Delta max_idle_connection_state_lifetime,
276 QuicTime::Delta default_idle_conection_state_lifetime);
278 QuicTime::Delta IdleConnectionStateLifetime() const;
280 QuicTime::Delta KeepaliveTimeout() const;
282 void SetMaxStreamsPerConnection(size_t max_streams, size_t default_streams);
284 uint32 MaxStreamsPerConnection() const;
286 void set_max_time_before_crypto_handshake(
287 QuicTime::Delta max_time_before_crypto_handshake) {
288 max_time_before_crypto_handshake_ = max_time_before_crypto_handshake;
291 QuicTime::Delta max_time_before_crypto_handshake() const {
292 return max_time_before_crypto_handshake_;
295 void set_max_idle_time_before_crypto_handshake(
296 QuicTime::Delta max_idle_time_before_crypto_handshake) {
297 max_idle_time_before_crypto_handshake_ =
298 max_idle_time_before_crypto_handshake;
301 QuicTime::Delta max_idle_time_before_crypto_handshake() const {
302 return max_idle_time_before_crypto_handshake_;
305 void set_max_undecryptable_packets(size_t max_undecryptable_packets) {
306 max_undecryptable_packets_ = max_undecryptable_packets;
309 size_t max_undecryptable_packets() const {
310 return max_undecryptable_packets_;
313 bool HasSetBytesForConnectionIdToSend() const;
315 // Sets the peer's connection id length, in bytes.
316 void SetBytesForConnectionIdToSend(uint32 bytes);
318 bool HasReceivedBytesForConnectionId() const;
320 uint32 ReceivedBytesForConnectionId() const;
322 // Sets the peer's default initial congestion window in packets.
323 void SetInitialCongestionWindowToSend(size_t initial_window);
325 bool HasReceivedInitialCongestionWindow() const;
327 uint32 ReceivedInitialCongestionWindow() const;
329 // Sets an estimated initial round trip time in us.
330 void SetInitialRoundTripTimeUsToSend(size_t rtt_us);
332 bool HasReceivedInitialRoundTripTimeUs() const;
334 uint32 ReceivedInitialRoundTripTimeUs() const;
336 bool HasInitialRoundTripTimeUsToSend() const;
338 uint32 GetInitialRoundTripTimeUsToSend() const;
340 // TODO(rjshade): Remove all InitialFlowControlWindow methods when removing
342 // Sets an initial stream flow control window size to transmit to the peer.
343 void SetInitialFlowControlWindowToSend(uint32 window_bytes);
345 uint32 GetInitialFlowControlWindowToSend() const;
347 bool HasReceivedInitialFlowControlWindowBytes() const;
349 uint32 ReceivedInitialFlowControlWindowBytes() const;
351 // Sets an initial stream flow control window size to transmit to the peer.
352 void SetInitialStreamFlowControlWindowToSend(uint32 window_bytes);
354 uint32 GetInitialStreamFlowControlWindowToSend() const;
356 bool HasReceivedInitialStreamFlowControlWindowBytes() const;
358 uint32 ReceivedInitialStreamFlowControlWindowBytes() const;
360 // Sets an initial session flow control window size to transmit to the peer.
361 void SetInitialSessionFlowControlWindowToSend(uint32 window_bytes);
363 uint32 GetInitialSessionFlowControlWindowToSend() const;
365 bool HasReceivedInitialSessionFlowControlWindowBytes() const;
367 uint32 ReceivedInitialSessionFlowControlWindowBytes() const;
369 // Sets socket receive buffer to transmit to the peer.
370 void SetSocketReceiveBufferToSend(uint32 window_bytes);
372 uint32 GetSocketReceiveBufferToSend() const;
374 bool HasReceivedSocketReceiveBuffer() const;
376 uint32 ReceivedSocketReceiveBuffer() const;
378 bool negotiated() const;
380 // ToHandshakeMessage serialises the settings in this object as a series of
381 // tags /value pairs and adds them to |out|.
382 void ToHandshakeMessage(CryptoHandshakeMessage* out) const;
384 // Calls ProcessPeerHello on each negotiable parameter. On failure returns
385 // the corresponding QuicErrorCode and sets detailed error in |error_details|.
386 QuicErrorCode ProcessPeerHello(const CryptoHandshakeMessage& peer_hello,
387 HelloType hello_type,
388 std::string* error_details);
391 friend class test::QuicConfigPeer;
393 // SetDefaults sets the members to sensible, default values.
396 // Configurations options that are not negotiated.
397 // Maximum time the session can be alive before crypto handshake is finished.
398 QuicTime::Delta max_time_before_crypto_handshake_;
399 // Maximum idle time before the crypto handshake has completed.
400 QuicTime::Delta max_idle_time_before_crypto_handshake_;
401 // Maximum number of undecryptable packets stored before CHLO/SHLO.
402 size_t max_undecryptable_packets_;
404 // Congestion control feedback type.
405 QuicNegotiableTag congestion_feedback_;
406 // Connection options.
407 QuicFixedTagVector connection_options_;
408 // Idle connection state lifetime
409 QuicNegotiableUint32 idle_connection_state_lifetime_seconds_;
410 // Keepalive timeout, or 0 to turn off keepalive probes
411 QuicNegotiableUint32 keepalive_timeout_seconds_;
412 // Maximum number of streams that the connection can support.
413 QuicNegotiableUint32 max_streams_per_connection_;
414 // The number of bytes required for the connection ID.
415 QuicFixedUint32 bytes_for_connection_id_;
416 // Initial congestion window in packets.
417 QuicFixedUint32 initial_congestion_window_;
418 // Initial round trip time estimate in microseconds.
419 QuicFixedUint32 initial_round_trip_time_us_;
421 // TODO(rjshade): Remove when removing QUIC_VERSION_19.
422 // Initial flow control receive window in bytes.
423 QuicFixedUint32 initial_flow_control_window_bytes_;
425 // Initial stream flow control receive window in bytes.
426 QuicFixedUint32 initial_stream_flow_control_window_bytes_;
427 // Initial session flow control receive window in bytes.
428 QuicFixedUint32 initial_session_flow_control_window_bytes_;
430 // Socket receive buffer in bytes.
431 QuicFixedUint32 socket_receive_buffer_;
436 #endif // NET_QUIC_QUIC_CONFIG_H_