ICNRG M. Mosko
Internet-Draft PARC
Intended status: Experimental January 9, 2015
Expires: July 13, 2015
CCNx Publisher Serial Versioning
draft-mosko-icnrg-ccnxserialversion-00
Abstract
This document specifies using a serial number to indicate versions in
name name segments. A serial number is an increasing unsigned
integer with an increment of 1. Therefore, given one name with a
serial version number, one may compute the next version number.
Status of this Memo
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This Internet-Draft will expire on July 13, 2015.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Requirements Language . . . . . . . . . . . . . . . . . . . 3
2. Protocol Description . . . . . . . . . . . . . . . . . . . . . 4
3. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 5
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 6
5. Security Considerations . . . . . . . . . . . . . . . . . . . . 7
6. References . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6.1. Normative References . . . . . . . . . . . . . . . . . . . 8
6.2. Informative References . . . . . . . . . . . . . . . . . . 8
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 9
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1. Introduction
This document specifies using a serial number in a CCNx name as a
version identifier. It specifies a new name segment label and a TLV
encoding. The use of a serial number in a name to denote a version
is limited to coordination among publishers if an attempt is made to
use a serial number as a distributed ordering.
Packets are represented as 32-bit wide words using ASCII art.
Because of the TLV encoding and optional fields or sizes, there is no
concise way to represent all possibilities. We use the convention
that ASCII art fields enclosed by vertical bars "|" represent exact
bit widths. Fields with a forward slash "/" are variable bitwidths,
which we typically pad out to word alignment for picture readability.
TODO -- we have not adopted the Requirements Language yet.
1.1. Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].
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2. Protocol Description
A serial number in a CCNx name name segment indicates an ordering on
names based on the unsigned integer. The serial number is encoded in
network byte order using the minimum number of bytes. The value of
"0" is represented as the single byte %x00.
The serial number must be incremented by 1 for consecutive versions
of the prior name name segments. There is no maximum serial number,
it is limited only by the number of bytes put in to the name
component.
A "GONE" PayloadType means that this version is a terminal version.
All prior versions should be interpreted as deleted. A user,
however, may publish more "DATA" after the terminal version, if he
decides to un-delete it.
+----------+-----------------------------------------+
| Type | Name |
+----------+-----------------------------------------+
| 'Serial' | Serial number, displayed as an Integer. |
+----------+-----------------------------------------+
Table 1: Labeled Content Information Types
+--------+----------+--------------+--------------------------------+
| Type | Symbol | Name | Description |
+--------+----------+--------------+--------------------------------+
| %x0013 | T_SERIAL | Serial | Serial Number, incrementing by |
| | | Number | +1. |
+--------+----------+--------------+--------------------------------+
Table 2: CCNx Name Types
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3. Acknowledgements
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4. IANA Considerations
This memo includes no request to IANA.
All drafts are required to have an IANA considerations section (see
Guidelines for Writing an IANA Considerations Section in RFCs
[RFC5226] for a guide). If the draft does not require IANA to do
anything, the section contains an explicit statement that this is the
case (as above). If there are no requirements for IANA, the section
will be removed during conversion into an RFC by the RFC Editor.
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5. Security Considerations
All drafts are required to have a security considerations section.
See RFC 3552 [RFC3552] for a guide.
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6. References
6.1. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
6.2. Informative References
[CCNx] PARC, Inc., "CCNx Open Source", 2007,
<http://www.ccnx.org>.
[RFC3552] Rescorla, E. and B. Korver, "Guidelines for Writing RFC
Text on Security Considerations", BCP 72, RFC 3552,
July 2003.
[RFC5226] Narten, T. and H. Alvestrand, "Guidelines for Writing an
IANA Considerations Section in RFCs", BCP 26, RFC 5226,
May 2008.
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Author's Address
Marc Mosko
PARC
Palo Alto, California 94304
USA
Phone: +01 650-812-4405
Email: marc.mosko@parc.com
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