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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.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
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   Internet-Drafts are draft documents valid for a maximum of six months
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   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

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

Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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   (http://trustee.ietf.org/license-info) in effect on the date of
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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.




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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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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>.

5.2.  Informative References

   [RFC7540]  Belshe, M., Peon, R., and M. Thomson, Ed., "Hypertext
              Transfer Protocol Version 2 (HTTP/2)", RFC 7540,
              DOI 10.17487/RFC7540, May 2015,
              <http://www.rfc-editor.org/info/rfc7540>.

Author's Address

   Mike Bishop
   Microsoft

   Email: michael.bishop@microsoft.com














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