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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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 // This file intentionally does not have header guards, it's included | 5 // This file intentionally does not have header guards, it's included |
| 6 // inside a macro to generate values. | 6 // inside a macro to generate values. |
| 7 | 7 |
| 8 // This file contains the list of QUIC protocol flags. | 8 // This file contains the list of QUIC protocol flags. |
| 9 | 9 |
| 10 // If true, QUIC BBR congestion control may be enabled via Finch and/or via QUIC | 10 // If true, QUIC BBR congestion control may be enabled via Finch and/or via QUIC |
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| 65 // If true, re-enables QUIC_VERSION_36. | 65 // If true, re-enables QUIC_VERSION_36. |
| 66 QUIC_FLAG(bool, FLAGS_quic_enable_version_36_v2, true) | 66 QUIC_FLAG(bool, FLAGS_quic_enable_version_36_v2, true) |
| 67 | 67 |
| 68 // If true, use async codepaths to invoke ProofSource::GetProof. | 68 // If true, use async codepaths to invoke ProofSource::GetProof. |
| 69 QUIC_FLAG(bool, FLAGS_enable_async_get_proof, false) | 69 QUIC_FLAG(bool, FLAGS_enable_async_get_proof, false) |
| 70 | 70 |
| 71 // If true, requires handshake confirmations for all QUIC handshakes with | 71 // If true, requires handshake confirmations for all QUIC handshakes with |
| 72 // versions less than 33. | 72 // versions less than 33. |
| 73 QUIC_FLAG(bool, FLAGS_quic_require_handshake_confirmation_pre33, false) | 73 QUIC_FLAG(bool, FLAGS_quic_require_handshake_confirmation_pre33, false) |
| 74 | 74 |
| 75 // If true, close QUIC connection explicitly on write error due to packet being | |
| 76 // too large. | |
| 77 QUIC_FLAG(bool, FLAGS_quic_close_connection_on_packet_too_large, true) | |
| 78 | |
| 79 // If true, v33 QUIC client uses 1 bit to specify 8-byte connection id in public | |
| 80 // flag. | |
| 81 QUIC_FLAG(bool, FLAGS_quic_remove_v33_hacks, true) | |
| 82 | |
| 83 // If true, use the CHLO packet size, not message size when determining how | 75 // If true, use the CHLO packet size, not message size when determining how |
| 84 // large a REJ can be. | 76 // large a REJ can be. |
| 85 QUIC_FLAG(bool, FLAGS_quic_use_chlo_packet_size, true) | 77 QUIC_FLAG(bool, FLAGS_quic_use_chlo_packet_size, true) |
| 86 | 78 |
| 87 // If true, defer creation of new connection till its CHLO arrives. | 79 // If true, defer creation of new connection till its CHLO arrives. |
| 88 QUIC_FLAG(bool, FLAGS_quic_buffer_packet_till_chlo, true) | 80 QUIC_FLAG(bool, FLAGS_quic_buffer_packet_till_chlo, true) |
| 89 | 81 |
| 90 // Deprecate QuicPacketCreator::next_packet_number_length_ because it's no | |
| 91 // longer necessary. | |
| 92 QUIC_FLAG(bool, FLAGS_quic_simple_packet_number_length_2, true) | |
| 93 | |
| 94 // If true, disables QUIC version less than 32. | 82 // If true, disables QUIC version less than 32. |
| 95 QUIC_FLAG(bool, FLAGS_quic_disable_pre_32, true) | 83 QUIC_FLAG(bool, FLAGS_quic_disable_pre_32, true) |
| 96 | 84 |
| 97 // If true, QUIC will enforce the MTU limit for connections that may require a | 85 // If true, QUIC will enforce the MTU limit for connections that may require a |
| 98 // small MTU. | 86 // small MTU. |
| 99 QUIC_FLAG(bool, FLAGS_quic_enforce_mtu_limit, false) | 87 QUIC_FLAG(bool, FLAGS_quic_enforce_mtu_limit, false) |
| 100 | 88 |
| 101 // Disable MTU probing if MTU probe causes ERR_MSG_TOO_BIG instead of aborting | 89 // Disable MTU probing if MTU probe causes ERR_MSG_TOO_BIG instead of aborting |
| 102 // the connection. | 90 // the connection. |
| 103 QUIC_FLAG(bool, FLAGS_graceful_emsgsize_on_mtu_probe, true) | 91 QUIC_FLAG(bool, FLAGS_graceful_emsgsize_on_mtu_probe, true) |
| 104 | 92 |
| 105 // If true, do not force sending ack when connection is closed because of | |
| 106 // message too long (EMSGSIZE) write error. | |
| 107 QUIC_FLAG(bool, FLAGS_quic_do_not_send_ack_on_emsgsize, true) | |
| 108 | |
| 109 // If true, postpone multipath flag validation to ProcessValidatedPacket. | |
| 110 QUIC_FLAG(bool, FLAGS_quic_postpone_multipath_flag_validation, true) | |
| 111 | |
| 112 // If true, set a QUIC connection's last_sent_for_timeout_ to the send time of | 93 // If true, set a QUIC connection's last_sent_for_timeout_ to the send time of |
| 113 // the first packet sent after receiving a packet, even if the sent packet is | 94 // the first packet sent after receiving a packet, even if the sent packet is |
| 114 // a retransmission | 95 // a retransmission |
| 115 QUIC_FLAG(bool, FLAGS_quic_better_last_send_for_timeout, true) | 96 QUIC_FLAG(bool, FLAGS_quic_better_last_send_for_timeout, true) |
| 116 | 97 |
| 117 // If true, send an explicit TTL in QUIC REJ messages to mitigate client clock | 98 // If true, send an explicit TTL in QUIC REJ messages to mitigate client clock |
| 118 // skew. | 99 // skew. |
| 119 QUIC_FLAG(bool, FLAGS_quic_send_scfg_ttl, true) | 100 QUIC_FLAG(bool, FLAGS_quic_send_scfg_ttl, true) |
| 120 | 101 |
| 121 // If true, only open limited number of quic sessions per epoll event. Leave the | 102 // If true, only open limited number of quic sessions per epoll event. Leave the |
| 122 // rest to next event. This flag can be turned on only if | 103 // rest to next event. This flag can be turned on only if |
| 123 // --quic_buffer_packet_till_chlo is true. | 104 // --quic_buffer_packet_till_chlo is true. |
| 124 QUIC_FLAG(bool, FLAGS_quic_limit_num_new_sessions_per_epoll_loop, false) | 105 QUIC_FLAG(bool, FLAGS_quic_limit_num_new_sessions_per_epoll_loop, false) |
| 125 | 106 |
| 126 // If true, lazy allocate and early release memeory used in | 107 // If true, lazy allocate and early release memeory used in |
| 127 // QuicStreamSequencerBuffer to buffer incoming data. | 108 // QuicStreamSequencerBuffer to buffer incoming data. |
| 128 QUIC_FLAG(bool, FLAGS_quic_reduce_sequencer_buffer_memory_life_time, true) | 109 QUIC_FLAG(bool, FLAGS_quic_reduce_sequencer_buffer_memory_life_time, true) |
| 129 | 110 |
| 130 // If true, allow server address change if it is because of mapped ipv4 address. | 111 // If true, allow server address change if it is because of mapped ipv4 address. |
| 131 QUIC_FLAG(bool, FLAGS_quic_allow_server_address_change_for_mapped_ipv4, true) | 112 QUIC_FLAG(bool, FLAGS_quic_allow_server_address_change_for_mapped_ipv4, true) |
| 132 | 113 |
| 133 // If true, disables QUIC version less than 34. | 114 // If true, disables QUIC version less than 34. |
| 134 QUIC_FLAG(bool, FLAGS_quic_disable_pre_34, false) | 115 QUIC_FLAG(bool, FLAGS_quic_disable_pre_34, false) |
| 135 | 116 |
| 136 // When true, decode the packet number from the largest received packet, rather | 117 // When true, decode the packet number from the largest received packet, rather |
| 137 // than the most recent. | 118 // than the most recent. |
| 138 QUIC_FLAG(bool, FLAGS_quic_packet_numbers_largest_received, true) | 119 QUIC_FLAG(bool, FLAGS_quic_packet_numbers_largest_received, true) |
| 120 |
| 121 // Only close the connection on the 5th RTO client side when the 5RTO option |
| 122 // is enabled. |
| 123 QUIC_FLAG(bool, FLAGS_quic_only_5rto_client_side, true) |
| 124 |
| 125 // If true, QUIC server push will enabled by default. |
| 126 QUIC_FLAG(bool, FLAGS_quic_enable_server_push_by_default, false) |
| 127 |
| 128 // Only inform the QuicSentPacketManager of packets that were sent, |
| 129 // not those that we tried to send. |
| 130 QUIC_FLAG(bool, FLAGS_quic_only_track_sent_packets, false) |
| 131 |
| 132 // If true, connection is closed when packet generator is trying to |
| 133 // add a frame which alone cannot fit into a packet. |
| 134 QUIC_FLAG(bool, FLAGS_quic_close_connection_on_huge_frames, true) |
| 135 |
| 136 // As the Linux kernel does, limit QUIC's Cubic congestion control to |
| 137 // only increase the CWND 1 packet for every two packets acked. |
| 138 QUIC_FLAG(bool, FLAGS_quic_limit_cubic_cwnd_increase, true) |
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