ALTSVC Frame in HTTP/QUIC
draft-bishop-httpbis-altsvc-quic-00

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HTTPbis                                                        M. Bishop
Internet-Draft                                                 Microsoft
Intended status: Standards Track                           July 24, 2017
Expires: January 25, 2018

                       ALTSVC Frame in HTTP/QUIC
                  draft-bishop-httpbis-altsvc-quic-00

Abstract

   [RFC7838] defines the ALTSVC frame for HTTP/2 [RFC7540].  This frame
   is equally applicable to HTTP/QUIC ([I-D.ietf-quic-http]), but needs
   to be separately registered.  This document describes the ALTSVC
   frame for HTTP/QUIC.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on January 25, 2018.

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Bishop                  Expires January 25, 2018                [Page 1]
Internet-Draft             ALTSVC in HTTP/QUIC                 July 2017

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  The ALTSVC HTTP/QUIC Frame  . . . . . . . . . . . . . . . . .   2
   3.  Security Considerations . . . . . . . . . . . . . . . . . . .   2
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   3
   5.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   3
     5.1.  Normative References  . . . . . . . . . . . . . . . . . .   3
     5.2.  Informative References  . . . . . . . . . . . . . . . . .   3
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   3

1.  Introduction

   [RFC7838] defines HTTP Alternative Services, which allow an origin's
   resources to be authoritatively available at a separate network
   location, possibly accessed with a different protocol configuration.
   It defines two mechanisms for transporting such information, an HTTP
   response header and an HTTP/2 frame type.

   [I-D.ietf-quic-http] describes the required updates for HTTP/2 frames
   to be used with HTTP/QUIC.  Only a few modifications are required for
   the ALTSVC frame.  No modifications are required for the "Alt-Svc"
   header field.

2.  The ALTSVC HTTP/QUIC Frame

   The ALTSVC HTTP/QUIC frame advertises the availability of an
   alternative service to an HTTP/QUIC client.

   An ALTSVC frame from a server to a client on stream 1 (not 0, as in
   HTTP/2) indicates that the conveyed alternative service is associated
   with the origin contained in the Origin field of the frame.

   An ALTSVC frame from a server to a client on a stream other than
   stream 1 indicates that the conveyed alternative service is
   associated with the origin of that stream.

   The layout and semantics of the frame are identical to those of the
   HTTP/2 frame defined in [RFC7838].  The ALTSVC frame type is 0xa
   (decimal 10), as in HTTP/2.

3.  Security Considerations

   This document introduces no new security considerations beyond those
   discussed in [RFC7838] and [I-D.ietf-quic-http].

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Internet-Draft             ALTSVC in HTTP/QUIC                 July 2017

4.  IANA Considerations

   This document registers the ALTSVC frame type in the "HTTP/QUIC Frame
   Type" registry ([I-D.ietf-quic-http]).

   Frame Type:  ALTSVC

   Code:  0xa

   Specification:  This document

5.  References

5.1.  Normative References

   [I-D.ietf-quic-http]
              Bishop, M., "Hypertext Transfer Protocol (HTTP) over
              QUIC", draft-ietf-quic-http-04 (work in progress), June
              2017.

   [RFC7838]  Nottingham, M., McManus, P., and J. Reschke, "HTTP
              Alternative Services", RFC 7838, DOI 10.17487/RFC7838,
              April 2016, <http://www.rfc-editor.org/info/rfc7838>.
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