| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "components/network_session_configurator/network_session_configurator.h" |
| |
| #include <map> |
| |
| #include "base/metrics/field_trial.h" |
| #include "base/strings/string_number_conversions.h" |
| #include "base/strings/string_piece.h" |
| #include "base/strings/string_split.h" |
| #include "base/strings/string_util.h" |
| #include "components/data_reduction_proxy/core/common/data_reduction_proxy_params.h" |
| #include "components/variations/variations_associated_data.h" |
| #include "components/version_info/version_info.h" |
| #include "net/http/http_stream_factory.h" |
| #include "net/quic/core/quic_protocol.h" |
| #include "net/quic/core/quic_utils.h" |
| #include "net/url_request/url_fetcher.h" |
| |
| namespace { |
| |
| // Map from name to value for all parameters associate with a field trial. |
| using VariationParameters = std::map<std::string, std::string>; |
| |
| const char kTCPFastOpenFieldTrialName[] = "TCPFastOpen"; |
| const char kTCPFastOpenHttpsEnabledGroupName[] = "HttpsEnabled"; |
| |
| const char kQuicFieldTrialName[] = "QUIC"; |
| const char kQuicFieldTrialEnabledGroupName[] = "Enabled"; |
| const char kQuicFieldTrialHttpsEnabledGroupName[] = "HttpsEnabled"; |
| |
| // Field trial for HTTP/2. |
| const char kHttp2FieldTrialName[] = "HTTP2"; |
| const char kHttp2FieldTrialDisablePrefix[] = "Disable"; |
| |
| // Returns the value associated with |key| in |params| or "" if the |
| // key is not present in the map. |
| const std::string& GetVariationParam( |
| const std::map<std::string, std::string>& params, |
| const std::string& key) { |
| std::map<std::string, std::string>::const_iterator it = params.find(key); |
| if (it == params.end()) |
| return base::EmptyString(); |
| |
| return it->second; |
| } |
| |
| void ConfigureTCPFastOpenParams(base::StringPiece tfo_trial_group, |
| net::HttpNetworkSession::Params* params) { |
| if (tfo_trial_group == kTCPFastOpenHttpsEnabledGroupName) |
| params->enable_tcp_fast_open_for_ssl = true; |
| } |
| |
| void ConfigureHttp2Params(base::StringPiece http2_trial_group, |
| net::HttpNetworkSession::Params* params) { |
| if (http2_trial_group.starts_with(kHttp2FieldTrialDisablePrefix)) { |
| params->enable_http2 = false; |
| } |
| } |
| |
| bool ShouldEnableQuic(base::StringPiece quic_trial_group, |
| bool is_quic_force_disabled, |
| bool is_quic_force_enabled) { |
| if (is_quic_force_disabled) |
| return false; |
| if (is_quic_force_enabled) |
| return true; |
| |
| return quic_trial_group.starts_with(kQuicFieldTrialEnabledGroupName) || |
| quic_trial_group.starts_with(kQuicFieldTrialHttpsEnabledGroupName); |
| } |
| |
| bool ShouldDisableQuicWhenConnectionTimesOutWithOpenStreams( |
| const VariationParameters& quic_trial_params) { |
| return base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, |
| "disable_quic_on_timeout_with_open_streams"), |
| "true"); |
| } |
| |
| bool ShouldQuicDisableConnectionPooling( |
| const VariationParameters& quic_trial_params) { |
| return base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, "disable_connection_pooling"), |
| "true"); |
| } |
| |
| bool ShouldQuicEnableAlternativeServicesForDifferentHost( |
| const VariationParameters& quic_trial_params) { |
| return !base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, |
| "enable_alternative_service_with_different_host"), |
| "false"); |
| } |
| |
| net::QuicTagVector GetQuicConnectionOptions( |
| const VariationParameters& quic_trial_params) { |
| VariationParameters::const_iterator it = |
| quic_trial_params.find("connection_options"); |
| if (it == quic_trial_params.end()) { |
| return net::QuicTagVector(); |
| } |
| |
| return net::QuicUtils::ParseQuicConnectionOptions(it->second); |
| } |
| |
| bool ShouldQuicAlwaysRequireHandshakeConfirmation( |
| const VariationParameters& quic_trial_params) { |
| return base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, |
| "always_require_handshake_confirmation"), |
| "true"); |
| } |
| |
| float GetQuicLoadServerInfoTimeoutSrttMultiplier( |
| const VariationParameters& quic_trial_params) { |
| double value; |
| if (base::StringToDouble( |
| GetVariationParam(quic_trial_params, "load_server_info_time_to_srtt"), |
| &value)) { |
| return static_cast<float>(value); |
| } |
| return 0.0f; |
| } |
| |
| bool ShouldQuicEnableConnectionRacing( |
| const VariationParameters& quic_trial_params) { |
| return base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, "enable_connection_racing"), "true"); |
| } |
| |
| bool ShouldQuicEnableNonBlockingIO( |
| const VariationParameters& quic_trial_params) { |
| return base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, "enable_non_blocking_io"), "true"); |
| } |
| |
| bool ShouldQuicDisableDiskCache(const VariationParameters& quic_trial_params) { |
| return base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, "disable_disk_cache"), "true"); |
| } |
| |
| bool ShouldQuicPreferAes(const VariationParameters& quic_trial_params) { |
| return base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, "prefer_aes"), "true"); |
| } |
| |
| bool ShouldForceHolBlocking(const VariationParameters& quic_trial_params) { |
| return base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, "force_hol_blocking"), "true"); |
| } |
| |
| int GetQuicMaxNumberOfLossyConnections( |
| const VariationParameters& quic_trial_params) { |
| int value; |
| if (base::StringToInt(GetVariationParam(quic_trial_params, |
| "max_number_of_lossy_connections"), |
| &value)) { |
| return value; |
| } |
| return 0; |
| } |
| |
| float GetQuicPacketLossThreshold(const VariationParameters& quic_trial_params) { |
| double value; |
| if (base::StringToDouble( |
| GetVariationParam(quic_trial_params, "packet_loss_threshold"), |
| &value)) { |
| return static_cast<float>(value); |
| } |
| return 0.0f; |
| } |
| |
| int GetQuicSocketReceiveBufferSize( |
| const VariationParameters& quic_trial_params) { |
| int value; |
| if (base::StringToInt( |
| GetVariationParam(quic_trial_params, "receive_buffer_size"), |
| &value)) { |
| return value; |
| } |
| return 0; |
| } |
| |
| bool ShouldQuicDelayTcpRace(const VariationParameters& quic_trial_params) { |
| return !base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, "disable_delay_tcp_race"), "true"); |
| } |
| |
| bool ShouldQuicCloseSessionsOnIpChange( |
| const VariationParameters& quic_trial_params) { |
| return base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, "close_sessions_on_ip_change"), |
| "true"); |
| } |
| |
| int GetQuicIdleConnectionTimeoutSeconds( |
| const VariationParameters& quic_trial_params) { |
| int value; |
| if (base::StringToInt(GetVariationParam(quic_trial_params, |
| "idle_connection_timeout_seconds"), |
| &value)) { |
| return value; |
| } |
| return 0; |
| } |
| |
| bool ShouldQuicDisablePreConnectIfZeroRtt( |
| const VariationParameters& quic_trial_params) { |
| return base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, "disable_preconnect_if_0rtt"), |
| "true"); |
| } |
| |
| std::unordered_set<std::string> GetQuicHostWhitelist( |
| const VariationParameters& quic_trial_params) { |
| std::string whitelist = |
| GetVariationParam(quic_trial_params, "quic_host_whitelist"); |
| std::unordered_set<std::string> hosts; |
| for (const std::string& host : base::SplitString( |
| whitelist, ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL)) { |
| hosts.insert(host); |
| } |
| return hosts; |
| } |
| |
| bool ShouldQuicMigrateSessionsOnNetworkChange( |
| const VariationParameters& quic_trial_params) { |
| return base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, |
| "migrate_sessions_on_network_change"), |
| "true"); |
| } |
| |
| bool ShouldQuicMigrateSessionsEarly( |
| const VariationParameters& quic_trial_params) { |
| return base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, "migrate_sessions_early"), "true"); |
| } |
| |
| bool ShouldQuicAllowServerMigration( |
| const VariationParameters& quic_trial_params) { |
| return base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, |
| "allow_server_migration"), |
| "true"); |
| } |
| |
| size_t GetQuicMaxPacketLength(const VariationParameters& quic_trial_params) { |
| unsigned value; |
| if (base::StringToUint( |
| GetVariationParam(quic_trial_params, "max_packet_length"), &value)) { |
| return value; |
| } |
| return 0; |
| } |
| |
| net::QuicVersion GetQuicVersion(const VariationParameters& quic_trial_params) { |
| return network_session_configurator::ParseQuicVersion( |
| GetVariationParam(quic_trial_params, "quic_version")); |
| } |
| |
| void ConfigureQuicParams(base::StringPiece quic_trial_group, |
| const VariationParameters& quic_trial_params, |
| bool is_quic_force_disabled, |
| bool is_quic_force_enabled, |
| const std::string& quic_user_agent_id, |
| net::HttpNetworkSession::Params* params) { |
| params->enable_quic = ShouldEnableQuic( |
| quic_trial_group, is_quic_force_disabled, is_quic_force_enabled); |
| params->disable_quic_on_timeout_with_open_streams = |
| ShouldDisableQuicWhenConnectionTimesOutWithOpenStreams(quic_trial_params); |
| |
| params->enable_quic_alternative_service_with_different_host = |
| ShouldQuicEnableAlternativeServicesForDifferentHost(quic_trial_params); |
| |
| if (params->enable_quic) { |
| params->quic_always_require_handshake_confirmation = |
| ShouldQuicAlwaysRequireHandshakeConfirmation(quic_trial_params); |
| params->quic_disable_connection_pooling = |
| ShouldQuicDisableConnectionPooling(quic_trial_params); |
| int receive_buffer_size = GetQuicSocketReceiveBufferSize(quic_trial_params); |
| if (receive_buffer_size != 0) { |
| params->quic_socket_receive_buffer_size = receive_buffer_size; |
| } |
| params->quic_delay_tcp_race = ShouldQuicDelayTcpRace(quic_trial_params); |
| float load_server_info_timeout_srtt_multiplier = |
| GetQuicLoadServerInfoTimeoutSrttMultiplier(quic_trial_params); |
| if (load_server_info_timeout_srtt_multiplier != 0) { |
| params->quic_load_server_info_timeout_srtt_multiplier = |
| load_server_info_timeout_srtt_multiplier; |
| } |
| params->quic_enable_connection_racing = |
| ShouldQuicEnableConnectionRacing(quic_trial_params); |
| params->quic_enable_non_blocking_io = |
| ShouldQuicEnableNonBlockingIO(quic_trial_params); |
| params->quic_disable_disk_cache = |
| ShouldQuicDisableDiskCache(quic_trial_params); |
| params->quic_prefer_aes = ShouldQuicPreferAes(quic_trial_params); |
| params->quic_force_hol_blocking = ShouldForceHolBlocking(quic_trial_params); |
| int max_number_of_lossy_connections = |
| GetQuicMaxNumberOfLossyConnections(quic_trial_params); |
| if (max_number_of_lossy_connections != 0) { |
| params->quic_max_number_of_lossy_connections = |
| max_number_of_lossy_connections; |
| } |
| float packet_loss_threshold = GetQuicPacketLossThreshold(quic_trial_params); |
| if (packet_loss_threshold != 0) |
| params->quic_packet_loss_threshold = packet_loss_threshold; |
| // Default to disabling port selection on all channels. |
| params->enable_quic_port_selection = false; |
| params->quic_connection_options = |
| GetQuicConnectionOptions(quic_trial_params); |
| params->quic_close_sessions_on_ip_change = |
| ShouldQuicCloseSessionsOnIpChange(quic_trial_params); |
| int idle_connection_timeout_seconds = |
| GetQuicIdleConnectionTimeoutSeconds(quic_trial_params); |
| if (idle_connection_timeout_seconds != 0) { |
| params->quic_idle_connection_timeout_seconds = |
| idle_connection_timeout_seconds; |
| } |
| params->quic_disable_preconnect_if_0rtt = |
| ShouldQuicDisablePreConnectIfZeroRtt(quic_trial_params); |
| params->quic_host_whitelist = GetQuicHostWhitelist(quic_trial_params); |
| params->quic_migrate_sessions_on_network_change = |
| ShouldQuicMigrateSessionsOnNetworkChange(quic_trial_params); |
| params->quic_migrate_sessions_early = |
| ShouldQuicMigrateSessionsEarly(quic_trial_params); |
| params->quic_allow_server_migration = |
| ShouldQuicAllowServerMigration(quic_trial_params); |
| } |
| |
| size_t max_packet_length = GetQuicMaxPacketLength(quic_trial_params); |
| if (max_packet_length != 0) { |
| params->quic_max_packet_length = max_packet_length; |
| } |
| |
| params->quic_user_agent_id = quic_user_agent_id; |
| |
| net::QuicVersion version = GetQuicVersion(quic_trial_params); |
| if (version != net::QUIC_VERSION_UNSUPPORTED) { |
| net::QuicVersionVector supported_versions; |
| supported_versions.push_back(version); |
| params->quic_supported_versions = supported_versions; |
| } |
| } |
| |
| } // anonymous namespace |
| |
| namespace network_session_configurator { |
| |
| net::QuicVersion ParseQuicVersion(const std::string& quic_version) { |
| net::QuicVersionVector supported_versions = net::AllSupportedVersions(); |
| for (size_t i = 0; i < supported_versions.size(); ++i) { |
| net::QuicVersion version = supported_versions[i]; |
| if (net::QuicVersionToString(version) == quic_version) { |
| return version; |
| } |
| } |
| |
| return net::QUIC_VERSION_UNSUPPORTED; |
| } |
| |
| void ParseFieldTrials(bool is_quic_force_disabled, |
| bool is_quic_force_enabled, |
| const std::string& quic_user_agent_id, |
| net::HttpNetworkSession::Params* params) { |
| std::string quic_trial_group = |
| base::FieldTrialList::FindFullName(kQuicFieldTrialName); |
| VariationParameters quic_trial_params; |
| if (!variations::GetVariationParams(kQuicFieldTrialName, &quic_trial_params)) |
| quic_trial_params.clear(); |
| ConfigureQuicParams(quic_trial_group, quic_trial_params, |
| is_quic_force_disabled, is_quic_force_enabled, |
| quic_user_agent_id, params); |
| |
| std::string http2_trial_group = |
| base::FieldTrialList::FindFullName(kHttp2FieldTrialName); |
| ConfigureHttp2Params(http2_trial_group, params); |
| |
| const std::string tfo_trial_group = |
| base::FieldTrialList::FindFullName(kTCPFastOpenFieldTrialName); |
| ConfigureTCPFastOpenParams(tfo_trial_group, params); |
| } |
| |
| } // namespace network_session_configurator |