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Two new socket options are introduced OPT_SEND_ECN used for setting ECN bits. OPT_RECV_ECN used for reading the ECN bits. If ECN bits are set on received IP packets, ECT(1) and CE is propagated via rtc::ReceivedPacket. Bug: webrtc:15368 Change-Id: I3ac335007e2f7d30564569bbc80ce47fa541bef1 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/332380 Reviewed-by: Jonas Oreland <jonaso@google.com> Reviewed-by: Harald Alvestrand <hta@webrtc.org> Commit-Queue: Per Kjellander <perkj@webrtc.org> Cr-Commit-Position: refs/heads/main@{#41885}
42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
/*
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* Copyright 2024 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef RTC_BASE_NETWORK_ECN_MARKING_H_
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#define RTC_BASE_NETWORK_ECN_MARKING_H_
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namespace rtc {
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// TODO(https://bugs.webrtc.org/15368): L4S support is slowly being developed.
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// Help is appreciated.
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// L4S Explicit Congestion Notification (ECN) .
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// https://www.rfc-editor.org/rfc/rfc9331.html ECT stands for ECN-Capable
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// Transport and CE stands for Congestion Experienced.
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// RFC-3168, Section 5
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// +-----+-----+
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// | ECN FIELD |
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// +-----+-----+
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// ECT CE [Obsolete] RFC 2481 names for the ECN bits.
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// 0 0 Not-ECT
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// 0 1 ECT(1)
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// 1 0 ECT(0)
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// 1 1 CE
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enum class EcnMarking {
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kNotEct = 0, // Not ECN-Capable Transport
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kEct1 = 1, // ECN-Capable Transport
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kEct0 = 2, // Not used by L4s (or webrtc.)
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kCe = 3, // Congestion experienced
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};
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} // namespace rtc
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#endif // RTC_BASE_NETWORK_ECN_MARKING_H_
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