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自分が調べて理解したこととかも雑に書いていきます。

モチベーション

• 一カ所にまとめておきたい
• 日本語訳重視

WebTransport のフォールバックについて

• WebTransport over HTTP/3 や WebTransport using HTTP/2 ではフォールバックについては一切触れられていない
• FallbackTransport はまだドラフトが出てきていない

Fallback support への方針

• Archive

1. TCP へフォールバックすべき
2. HTTP/2 へフォールバックすべき
3. draft がでている WebTransport using HTTP/2 で行く

Fallback support についての議論

Fallback support · Issue #107 · w3c/webtransport

WebTransport using HTTP/2 について IETF 110 議論

• https://youtu.be/FMAD8z0gyiw?t=6307
  • ここからスタート

WebTransport over HTTP/3 のフォールバックは 3 つになる

1. 失敗して終わり
2. 自由にフォールバック先を選べる
   • WebSocket over HTTP/2 など
3. WebTransport over HTTP/2 へフォールバック

個人的には 3 の WebTransport over HTTP/2 へフォールバックが綺麗で嬉しそう。

IETF 110

IETF 110 Proceedings

スライド

• IETF110_WEBTRANS_WG - Google スライド
• slides-110-rtcweb-aligning-jsep-bundle-00
• slides-110-rtcweb-nat-slipstream-00
• slides-110-sframe-sframemls-00

動画

• IETF110-RTCWEB-20210312-1200 - YouTube
  • ざっと見た
• IETF110-QUIC-20210310-1200 - YouTube
• IETF110-SFRAME-20210309-1430 - YouTube
  • ざっと見た
• IETF110-WEBTRANS-20210308-1600 - YouTube
  • ざっと見た、WebTransport using HTTP/2 が良かった
• IETF110-MLS-20210308-1430 - YouTube
• IETF110-AVTCORE-20210311-1200 - YouTube
  • Audio/Video Transport Core

WebTransport

• WebTransport (webtrans) - Documents
• WebTransport
• The WebTransport Protocol Framework
• WebTransport over HTTP/3
• WebTransport using HTTP/2
• chromium/third_party/blink/renderer/modules/webtransport at master · chromium/chromium

HTTP/3

• Hypertext Transfer Protocol Version 3 (HTTP/3)
• QPACK: Header Compression for HTTP/3
• Using QUIC Datagrams with HTTP/3
• draft-bishop-httpbis-altsvc-quic-01 - Existing HTTP/2 Extensions in HTTP/3
• draft-marx-quic-qlog-h3-events-00

QUIC

• RFC 8999 - Version-Independent Properties of QUIC 日本語訳
• RFC 9000 - QUIC: A UDP-Based Multiplexed and Secure Transport 日本語訳
• RFC 9001 - Using TLS to Secure QUIC 日本語訳
• RFC 9002 - QUIC Loss Detection and Congestion Control 日本語訳
• An Unreliable Datagram Extension to QUIC
• QUIC event definitions for qlog
  • quiclog/qvis: QUIC and HTTP/3 visualization tools
• draft-ietf-quic-load-balancers-06

QUIC v2

• QUIC Version 2

Media over QUIC

• Media Over QUIC - Use Cases and Considerations for Media Transport Protocol Design
• Operational Considerations for Streaming Media

実装

• mozilla/neqo
• cloudflare/quiche: 🥧 Savoury implementation of the QUIC transport protocol and HTTP/3
• ngtcp2/nghttp3: HTTP/3 library written in C
• ngtcp2/ngtcp2: ngtcp2 project is an effort to implement IETF QUIC protocol
• xflagstudio/requiem: QuicTransport (WebTransport over QUIC) framework for Elixir
• Support WebTransport over HTTP/3. (I3c430fc4) · Gerrit Code Review
• quiche - Git at Google
• h2o/h2o: H2O - the optimized HTTP/1, HTTP/2, HTTP/3 server
  • h2o/quicly: A modular QUIC stack designed primarily for H2O
  • h2o/picotls: TLS 1.3 implementation in C (master supports RFC8446 as well as draft-26, -27, -28)

動画

• WebTransport & WebCodecs - YouTube
• Zoom on Web: getting connected with advanced web technology - YouTube

GitHub

• ietf-wg-webtrans/draft-ietf-webtrans-http3: Internet Drafts for WebTransport
• ietf-wg-webtrans/draft-ietf-webtrans-overview: WebTransport overview draft.
• WebTransport over HTTP/3 support · Issue #163 · aiortc/aioquic

web-transport-dev

web-transport-dev - Google グループ

• WebTransport status and plan
• Devtools for WebTransport

ASnoKaze blog

@flano_yuki のブログ

• WebTransport over HTTP/3のプロトコル仕様 - ASnoKaze blog
• WebTransport over HTTP/2 の仕様について - ASnoKaze blog
• WebTransportの方向性 (2021年1月の中間会議をうけて) - ASnoKaze blog
• QUIC用APIを実装したOpenSSL forkの登場 - ASnoKaze blog

E2EE

• Cryptology ePrint Archive: Report 2021/424 - Security Analysis of SFrame
  • SFrame のセキュリティ解析
• eomara/sframe: Internet draft for SFrame
• draft-barnes-sframe-mls-00 - Using Messaging Layer Security (MLS) to Provide Keys for SFrame
• draft-omara-sframe-02 - Secure Frame (SFrame)
• Solutions - Zero-Trust Security for Webex White Paper - Cisco
  • draft-biggs-acme-sso-01 - Automated Certificate Management Environment (ACME) Extension for Single Sign On Challenges
    • ACME + SSO
    • draft-ietf-acme-email-smime-14 - Extensions to Automatic Certificate Management Environment for end-user S/MIME certificates
• draft-knodel-e2ee-definition-00
  • Definition of End-to-end Encryption 翻訳
• zoom/zoom-e2e-whitepaper: End-to-End Encryption for Zoom Meetings

MLS

• The Messaging Layer Security (MLS) Architecture
• The Messaging Layer Security (MLS) Protocol
• https://i.blackhat.com/USA-19/Wednesday/us-19-Robert-Messaging-Layer-Security-Towards-A-New-Era-Of-Secure-Group-Messaging.pdf
• https://www.diva-portal.org/smash/get/diva2:1388449/FULLTEXT01.pdf

実装

• cisco/sframe: Implementation of draft-omara-sframe
• cisco/go-hpke: Implementation of draft-irtf-cfrg-hpke
• cisco/go-mls: Message Layer Security
• cisco/mlspp: Implementation of Messaging Layer Security
• openmls/openmls: Rust implementation of the Messaging Layer Security (MLS) protocol
  • MLS の Rust 実装
  • Wire の人が主導
  • franziskuskiefer/hpke-rs: Pure Rust implementation of HPKE (https://cfrg.github.io/draft-irtf-cfrg-hpke/draft-irtf-cfrg-hpke.html)

RFC

HTTP/2

• RFC 6202 - Known Issues and Best Practices for the Use of Long Polling and Streaming in Bidirectional HTTP 日本語訳
• RFC 8441 - Bootstrapping WebSockets with HTTP/2 日本語訳
• RFC 7838 - HTTP Alternative Services 日本語訳
• RFC 7639 - The ALPN HTTP Header Field 日本語訳
• RFC 7301 - Transport Layer Security (TLS) Application-Layer Protocol Negotiation Extension 日本語訳
• RFC 8447 - IANA Registry Updates for TLS and DTLS 日本語訳
• RFC 7540 - Hypertext Transfer Protocol Version 2 (HTTP/2) 日本語訳
• RFC 8740 - Using TLS 1.3 with HTTP/2 日本語訳

ドラフト

• Service binding and parameter specification via the DNS (DNS SVCB and HTTPS RRs)

書籍

• よくわかるHTTP/2の教科書
  • HTTP/2 がどんなもんか？というのを知るのに良い本
  • とにかくキーワードについて短く簡潔にまとめられている
• 詳解HTTP/2 電子書籍
  • HTTP/2 in Action の翻訳本
  • 2019 年の本なので QUIC / HTTP/3 については古い情報になってる
  • 一つ一つについて細かく説明しているので読み応えがある

WebRTC

W3C

• WebRTC 1.0: Real-Time Communication Between Browsers
• Identifiers for WebRTC's Statistics API
• Media Capture and Streams
• Audio Output Devices API
• Screen Capture
• WebRTC Encoded Transform
  • w3c/webrtc-encoded-transform: WebRTC Encoded Media
  • Insertable Streams API は名前が WebRTC Encoded Transform に変わった
• MediaStreamTrack Insertable Media Processing using Streams
  • MediaStreamTrack Insertable Media Processing using Streams
  • https://github.com/w3c/mediacapture-transform
• MediaStreamTrack Content Hints
• Capture Handle - Bootstrapping Collaboration when Screensharing
• The Capture-Handle Actions Mechanism
• Viewport Capture

DTLS

• RFC 6347 - Datagram Transport Layer Security Version 1.2 日本語訳

ドラフト

• The Datagram Transport Layer Security (DTLS) Protocol Version 1.3

DataChannel

• RFC 8831 - WebRTC Data Channels 日本語訳

• RFC 8832 - WebRTC Data Channel Establishment Protocol 日本語訳

• RFC 8864 - Negotiation Data Channels Using the Session Description Protocol (SDP) 日本語訳

• Large Data Channel Messages - Advancing WebRTC

SCTP

• RFC 9260 - Stream Control Transmission Protocol (RFC 9260) 日本語訳
  • 以下が Obsolate されてる
  • RFC 4460 - Stream Control Transmission Protocol (SCTP) Specification Errata and Issues 日本語訳
  • RFC 4960 - Stream Control Transmission Protocol 日本語訳
  • RFC 6096 - Stream Control Transmission Protocol (SCTP) Chunk Flags Registration 日本語訳
  • RFC 7053 - SACK-IMMEDIATELY Extension for the Stream Control Transmission Protocol 日本語訳
  • RFC 8540 - Stream Control Transmission Protocol: Errata and Issues in RFC 4960 日本語訳
• RFC 3758 - Stream Control Transmission Protocol (SCTP) Partial Reliability Extension 日本語訳
• RFC 8261 - Datagram Transport Layer Security (DTLS) Encapsulation of SCTP Packets 日本語訳
• RFC 8260 - Stream Schedulers and User Message Interleaving for the Stream Control Transmission Protocol 日本語訳
  • SCTP で大きなデータを送るための拡張
• RFC 7765 - TCP and Stream Control Transmission Protocol (SCTP) RTO Restart 日本語訳
• RFC 6951 - UDP Encapsulation of Stream Control Transmission Protocol (SCTP) Packets for End-Host to End-Host Communication 日本語訳
• RFC 6525 - Stream Control Transmission Protocol (SCTP) Stream Reconfiguration 日本語訳
• RFC 6083 - Datagram Transport Layer Security (DTLS) for Stream Control Transmission Protocol (SCTP) 日本語訳
• RFC 5827 - Early Retransmit for TCP and Stream Control Transmission Protocol (SCTP) 日本語訳
• RFC 5061 - Stream Control Transmission Protocol (SCTP) Dynamic Address Reconfiguration 日本語訳
• Stream Control Transmission Protocol (SCTP) Parameters
• RFC 8841 - Session Description Protocol (SDP) Offer/Answer Procedures for Stream Control Transmission Protocol (SCTP) over Datagram Transport Layer Security (DTLS) Transport 日本語訳

ワーキンググループ

Transport Area Working Group (tsvwg)

SDP

• RFC 8843 - Negotiating Media Multiplexing Using the Session Description Protocol (SDP) 日本語訳
• RFC 8859 - A Framework for Session Description Protocol (SDP) Attributes When Multiplexing 日本語訳
• RFC 8853 - Using Simulcast in Session Description Protocol (SDP) and RTP Sessions 日本語訳
  • Simulcast の SDP について

RTP

• RFC 3550 - RTP: A Transport Protocol for Real-Time Applications 日本語訳

• RFC 3711 - The Secure Real-time Transport Protocol (SRTP) 日本語訳

• RFC 6904 - Encryption of Header Extensions in the Secure Real-time Transport Protocol (SRTP) 日本語訳

• RFC 3611 - RTP Control Protocol Extended Reports (RTCP XR) 日本語訳

• RFC 5764 - Datagram Transport Layer Security (DTLS) Extension to Establish Keys for the Secure Real-time Transport Protocol (SRTP) 日本語訳

• RFC 4585 - Extended RTP Profile for Real-time Transport Control Protocol (RTCP)-Based Feedback (RTP/AVPF) 日本語訳

• RFC 8852 - RTP Stream Identifier Source Description (SDES) 日本語訳

• RFC 7741 - RTP Payload Format for VP8 Video 日本語訳

• Real-Time Transport Protocol (RTP) Parameters

• Experimental RTP header extensions

  • Absolute Capture Time
  • Transport-Wide Congestion Control
  • Video Content Type
  • Video Timing

ドラフト

• draft-ietf-avtcore-rtp-vvc-08 - RTP Payload Format for Versatile Video Coding (VVC)
• draft-ietf-avtext-framemarking-12 - Frame Marking RTP Header Extension
• draft-ietf-payload-vp9-13
• draft-gouaillard-avtcore-codec-agn-rtp-payload-01
• draft-ietf-avtcore-cryptex-01 - Completely Encrypting RTP Header Extensions and Contributing Sources
• draft-ietf-avtcore-rtp-evc-01

VP8

• RFC 6386 - VP8 Data Format and Decoding Guide 日本語訳

FLAC

• Free Lossless Audio Codec

その他

• RFC 8085 - UDP Usage Guidelines 日本語訳
• RFC 8835 - Transports for WebRTC 日本語訳
• 2021 年に出た WebRTC 関連 RFC 一覧

WebAssembly

• js - The Go Programming Language
• WebAssembly · golang/go Wiki
• Using WebAssembly :: TinyGo - Go on Microcontrollers and WASM

暗号ライブラリ

WebAssembly で利用できる想定

• dalek cryptography
  • Rust の暗号ライブラリ
• cloudflare/circl: CIRCL: Cloudflare Interoperable Reusable Cryptographic Library
  • Introducing CIRCL: An Advanced Cryptographic Library
  • Cloudflare がメンテしている暗号関連ライブラリ

Erlang/OTP

• Add a new operator ^ for pinning of pattern variables by richcarl · Pull Request #2951 · erlang/otp

TLS

• RFC 7301 - Transport Layer Security (TLS) Application-Layer Protocol Negotiation Extension 日本語訳
• RFC 8446 - The Transport Layer Security (TLS) Protocol Version 1.3 日本語訳
• RFC 8447 - IANA Registry Updates for TLS and DTLS 日本語訳
• RFC 8448 - Example Handshake Traces for TLS 1.3 日本語訳
• RFC 8449 - Record Size Limit Extension for TLS 日本語訳
• Transport Layer Security (TLS) Extensions