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[AVTCORE] QUIC version 2 and RFC 7983bis

Bernard Aboba <bernard.aboba@gmail.com> Wed, 11 May 2022 22:42 UTC

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From: Bernard Aboba <bernard.aboba@gmail.com>
Date: Wed, 11 May 2022 15:42:41 -0700
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To: IETF AVTCore WG <avt@ietf.org>
Cc: Colin Perkins <csp@csperkins.org>, "Gonzalo Salgueiro (gsalguei)" <gsalguei@cisco.com>
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Subject: [AVTCORE] QUIC version 2 and RFC 7983bis
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At IETF 113, we discussed checking the compatibility of RFC 7983bis and
QUIC version 2 (https://datatracker.ietf.org/doc/html/draft-ietf-quic-v2)

Looking through the QUIC v2 specification, it appears compatible with the
multiplexing scheme described in RFC 7983bis, which focuses on the first
octet of the packet. QUIC v2 modifies the version field which resides in
the second through fifth octets of the long header, so that multiplexing is
not affected. QUICv2 does not change the first octet ranges of the QUIC
long header and short header so it remains compatible with the RFC
7983bis multiplexing scheme:

                       +----------------+
                       |        [0..3] -+--> forward to STUN
                       |                |
                       |      [16..19] -+--> forward to ZRTP
                       |                |
           packet -->  |      [20..63] -+--> forward to DTLS
                       |                |
                       |      [64..79] -+--> forward to TURN Channel
                       |     [64..127] -+--> forward to QUIC
                       |                |    (Short Header)
                       |    [128..191] -+--> forward to RTP/RTCP
                       |                |
                       |    [192..255] -+--> forward to QUIC

                       +----------------+ (Long Header)

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