Internet DRAFT - draft-petithuguenin-p2psip-reload-sctp
draft-petithuguenin-p2psip-reload-sctp
Network Working Group M. Petit-Huguenin
Internet-Draft Impedance Mismatch
Intended status: Standards Track February 17, 2013
Expires: August 21, 2013
SCTP Overlay link for REsource LOcation And Discovery (RELOAD)
draft-petithuguenin-p2psip-reload-sctp-00
Abstract
This document defines two new Overlay Link protocols to be used with
REsource LOcation And Discovery (RELOAD), both using SCTP. The
Overlay Link protocol DTLS-SCTP-NO-ICE uses DTLS on top of native
SCTP for overlays that do not require the use of ICE. The Overlay
Link protocol DTLS-SCTP-UDP uses DTLS on top of an UDP encapsulation
of SCTP for overlays that require the use of ICE.
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 August 21, 2013.
Copyright Notice
Copyright (c) 2013 IETF Trust and the persons identified as the
document authors. All rights reserved.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 2
3. DTLS-SCTP-NO-ICE Overlay Link Protocol . . . . . . . . . . . 3
4. DTLS-SCTP-UDP Overlay Link Protocol . . . . . . . . . . . . . 3
5. Security Considerations . . . . . . . . . . . . . . . . . . . 3
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 3
7. Normative References . . . . . . . . . . . . . . . . . . . . 3
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 4
1. Introduction
RELOAD [I-D.ietf-p2psip-base] defines 3 Overlay Link protocols, DTLS-
UDP-SR, TLS-TCP-FH-NO-ICE and DTLS-UDP-SR-NO-ICE but none of them
prevents Head of Line (HoL) blocking. DTLS for SCTP [RFC6083], is a
good candidate as Overlay Link protocol, but because most NATs cannot
handle SCTP [RFC4960], it can only been used with overlays that are
known to not have nodes behind a NAT. For overlays that may have
nodes behind a NAT, a UDP encapsulation of SCTP
[I-D.ietf-tsvwg-sctp-udp-encaps] is used in place of the native SCTP,
so it can traverses NAT Additionnaly using a UDP encapsulation does
not require to define how using SCTP in ICE.
2. Terminology
The key words "MUST" and "MUST NOT" in this document are to be
interpreted as described in [RFC2119].
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3. DTLS-SCTP-NO-ICE Overlay Link Protocol
This overlay link protocol consists of DTLS over SCTP, as specified
in [RFC6083]. The RELOAD messages MUST be sent on a stream other
than 0 (which is reserved for the DTLS ChangeCipherSpec, Alert and
Handshake protocols), with unlimited reliability but without the
ordered delivery feature.
The Framing Header or the Simple Reliability protocols described in
RELOAD MUST NOT be used.
4. DTLS-SCTP-UDP Overlay Link Protocol
This overlay link protocol consists of DTLS over an UDP encapsulation
of SCTP, as specified in [RFC6083] and
[I-D.ietf-tsvwg-sctp-udp-encaps]. The RELOAD messages MUST be sent
on a stream other than 0 (which is reserved for the DTLS
ChangeCipherSpec, Alert and Handshake protocols), with unlimited
reliability but without the ordered delivery feature.
The Framing Header or the Simple Reliability protocols described in
RELOAD MUST NOT be used.
5. Security Considerations
TBD.
6. IANA Considerations
If this document is accepted as a standard track document this
section will request that IANA assign codes for the DTLS-SCTP-NO-ICE
and DTLS-SCTP-UDP overlay protocols. Until this is done,
implementions should use code 5 (reserved for experimentations as
EXP-LINK). Using the same code is not an issue in this case as ICE
and NO-ICE Overlays Protocols cannot be be simultaneously used in the
same overlay.
[[Do we need to also assign a PPID?]]
7. Normative References
[I-D.ietf-p2psip-base]
Jennings, C., Lowekamp, B., Rescorla, E., Baset, S., and
H. Schulzrinne, "REsource LOcation And Discovery (RELOAD)
Base Protocol", draft-ietf-p2psip-base-24 (work in
progress), January 2013.
[I-D.ietf-tsvwg-sctp-udp-encaps]
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Tuexen, M. and R. Stewart, "UDP Encapsulation of SCTP
Packets", draft-ietf-tsvwg-sctp-udp-encaps-09 (work in
progress), January 2013.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC4960] Stewart, R., "Stream Control Transmission Protocol", RFC
4960, September 2007.
[RFC6083] Tuexen, M., Seggelmann, R., and E. Rescorla, "Datagram
Transport Layer Security (DTLS) for Stream Control
Transmission Protocol (SCTP)", RFC 6083, January 2011.
Author's Address
Marc Petit-Huguenin
Impedance Mismatch
Email: petithug@acm.org
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