// Copyright (c) 2022 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. // NOLINT(build/header_guard) // This file intentionally does not have header guards, it's intended to be // included multiple times, each time with a different definition of // QUICHE_PROTOCOL_FLAG. #if defined(QUICHE_PROTOCOL_FLAG) QUICHE_PROTOCOL_FLAG( bool, quic_allow_chlo_buffering, true, "If true, allows packets to be buffered in anticipation of a " "future CHLO, and allow CHLO packets to be buffered until next " "iteration of the event loop.") QUICHE_PROTOCOL_FLAG QUICHE_PROTOCOL_FLAG(bool, quic_disable_pacing_for_perf_tests, false, "If true, disable pacing in QUIC") // Note that single-packet CHLOs are only enforced for Google QUIC versions that // do not use CRYPTO frames. This currently means only Q043 and Q046. All other // versions of QUIC (both Google QUIC and IETF) allow multi-packet CHLOs // regardless of the value of this flag. QUICHE_PROTOCOL_FLAG(bool, quic_enforce_single_packet_chlo, true, "If true, enforce that sent QUIC CHLOs fit in one packet. " "Only applies to Q043 and Q046.") // Currently, this number is quite conservative. At a hypothetical 1000 qps, // this means that the longest time-wait list we should see is: // 200 seconds * 1000 qps = 200000. // Of course, there are usually many queries per QUIC connection, so we allow a // factor of 3 leeway. QUICHE_PROTOCOL_FLAG QUICHE_PROTOCOL_FLAG // This number is relatively conservative. For example, there are at most 1K // queued stateless resets, which consume 1K * 21B = 21KB. QUICHE_PROTOCOL_FLAG // Stop sending a reset if the recorded number of addresses that server has // recently sent stateless reset to exceeds this limit. QUICHE_PROTOCOL_FLAG // After this timeout, recent reset addresses will be cleared. // FLAGS_quic_max_recent_stateless_reset_addresses * (1000ms / // FLAGS_quic_recent_stateless_reset_addresses_lifetime_ms) is roughly the max // reset per second. For example, 1024 * (1000ms / 1000ms) = 1K reset per // second. QUICHE_PROTOCOL_FLAG QUICHE_PROTOCOL_FLAG( double, quic_bbr_cwnd_gain, 2.0f, "Congestion window gain for QUIC BBR during PROBE_BW phase.") QUICHE_PROTOCOL_FLAG QUICHE_PROTOCOL_FLAG QUICHE_PROTOCOL_FLAG QUICHE_PROTOCOL_FLAG( double, quic_lumpy_pacing_cwnd_fraction, 0.25f, "Congestion window fraction that the pacing sender allows in bursts " "during pacing.") QUICHE_PROTOCOL_FLAG QUICHE_PROTOCOL_FLAG QUICHE_PROTOCOL_FLAG( double, quic_pace_time_into_future_srtt_fraction, 0.125f, // One-eighth smoothed RTT "Smoothed RTT fraction that a connection can pace packets into the future.") QUICHE_PROTOCOL_FLAG( bool, quic_export_write_path_stats_at_server, false, "If true, export detailed write path statistics at server.") QUICHE_PROTOCOL_FLAG(bool, quic_disable_version_negotiation_grease_randomness, false, "If true, use predictable version negotiation versions.") QUICHE_PROTOCOL_FLAG(bool, quic_enable_http3_grease_randomness, true, "If true, use random greased settings and frames.") QUICHE_PROTOCOL_FLAG QUICHE_PROTOCOL_FLAG( bool, quic_client_convert_http_header_name_to_lowercase, true, "If true, HTTP request header names sent from QuicSpdyClientBase(and " "descendants) will be automatically converted to lower case.") QUICHE_PROTOCOL_FLAG QUICHE_PROTOCOL_FLAG QUICHE_PROTOCOL_FLAG( double, quic_bbr2_default_probe_rtt_inflight_target_bdp_fraction, 0.5, "The default fraction to adjust the target in flight BDP during " "PROBE_RTT phase.") QUICHE_PROTOCOL_FLAG QUICHE_PROTOCOL_FLAG QUICHE_PROTOCOL_FLAG( double, quic_bbr2_default_loss_threshold, 0.02, "The default loss threshold for QUIC BBRv2, should be a value " "between 0 and 1.") QUICHE_PROTOCOL_FLAG QUICHE_PROTOCOL_FLAG QUICHE_PROTOCOL_FLAG( double, quic_bbr2_default_inflight_hi_headroom, 0.15, "The default fraction of unutilized headroom to try to leave in path " "upon high loss.") QUICHE_PROTOCOL_FLAG QUICHE_PROTOCOL_FLAG( double, quic_ack_aggregation_bandwidth_threshold, 1.0, "If the bandwidth during ack aggregation is smaller than (estimated " "bandwidth * this flag), consider the current aggregation completed " "and starts a new one.") QUICHE_PROTOCOL_FLAG QUICHE_PROTOCOL_FLAG QUICHE_PROTOCOL_FLAG QUICHE_PROTOCOL_FLAG QUICHE_PROTOCOL_FLAG QUICHE_PROTOCOL_FLAG QUICHE_PROTOCOL_FLAG QUICHE_PROTOCOL_FLAG(bool, quic_disable_client_tls_zero_rtt, false, "If true, QUIC client with TLS will not try 0-RTT.") QUICHE_PROTOCOL_FLAG(bool, quic_disable_server_tls_resumption, false, "If true, QUIC server will disable TLS resumption by not " "issuing or processing session tickets.") QUICHE_PROTOCOL_FLAG(bool, quic_defer_send_in_response, true, "If true, QUIC servers will defer sending in response to " "incoming packets by default.") QUICHE_PROTOCOL_FLAG( bool, quic_header_size_limit_includes_overhead, true, "If true, QUIC QPACK decoder includes 32-bytes overheader per entry while " "comparing request/response header size against its upper limit.") QUICHE_PROTOCOL_FLAG( bool, quic_reject_retry_token_in_initial_packet, false, "If true, always reject retry_token received in INITIAL packets") QUICHE_PROTOCOL_FLAG(bool, quic_use_lower_server_response_mtu_for_test, false, "If true, cap server response packet size at 1250.") QUICHE_PROTOCOL_FLAG(bool, quic_enforce_strict_amplification_factor, false, "If true, enforce strict amplification factor") QUICHE_PROTOCOL_FLAG(bool, quic_bounded_crypto_send_buffer, false, "If true, close the connection if a crypto send buffer " "exceeds its size limit.") QUICHE_PROTOCOL_FLAG(bool, quic_interval_set_enable_add_optimization, true, "If true, enable an optimization in QuicIntervalSet") QUICHE_PROTOCOL_FLAG(bool, quic_server_disable_qpack_dynamic_table, false, "If true, disables use of the QPACK dynamic table in " "servers, both for decoding context (requests) and for " "encoding context (responses).") QUICHE_PROTOCOL_FLAG( bool, quic_enable_chaos_protection, true, "If true, use chaos protection to randomize client initials.") QUICHE_PROTOCOL_FLAG(bool, quic_always_support_server_preferred_address, false, "If false, the kSPAD connection option is required to use " "QUIC server preferred address support.") QUICHE_PROTOCOL_FLAG(bool, quiche_oghttp2_debug_trace, false, "If true, emits trace logs for HTTP/2 events.") QUICHE_PROTOCOL_FLAG( float, quic_ack_decimation_delay, 0.25f, "The fraction of a min_rtt when doing ack decimation, this fraction can be " "overridden by connection option AKD3.") // Uses a 25ms delayed ack timer. Helps with better signaling // in low-bandwidth (< ~384 kbps), where an ack is sent per packet. // NOTE: If the flag value exceeds half of kMinRetransmissionTimeMs, it will be // clamped to that value. QUICHE_PROTOCOL_FLAG QUICHE_PROTOCOL_FLAG #endif
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