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The attached draft defines a Raw TCP Printer service which extends
the existing printer service as defined in
draft-ietf-svrloc-printer-scheme-02.
To the ID editor:
Please place this in the repository.
/Mikael
-------------------------------------------------------------
Mikael Pahmp Software Architect
Axis Communications
Scheelev. 16 Email: Mikael .Pahmp@axis.com
S-223 70 Lund Phone: +46 46 270 18 81
Sweden Fax: +46 46 13 61 30
Visit our WWW-site at http://www.axis.com/
<<draft-ietf-svrloc-rawtcp-printer-scheme-00.txt>>
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Service Location Working Group Mikael =
Pahmp
INTERNET DRAFT Axis =
Communications
2 December 1998
Definition of printer:raw-tcp: URLs for use with Service Location
draft-ietf-srvloc-rawtcp-printer-scheme-00.txt
Status of This Memo
This document is a submission by the Service Location Working Group
of the Internet Engineering Task Force (IETF). Comments should be
submitted to the srvloc@srvloc.org mailing list.
Distribution of this memo is unlimited.
This document is an Internet-Draft. Internet-Drafts are working
documents of the Internet Engineering Task Force (IETF), its areas,
and its working groups. Note that other groups may also distribute
working documents as Internet-Drafts.
Internet-Drafts are draft documents valid for a maximum of six =
months
and may be updated, replaced, or obsoleted by other documents at
any time. It is inappropriate to use Internet- Drafts as reference
material or to cite them other than as ``work in progress.''
To view the entire list of current Internet-Drafts, please check
the ``1id-abstracts.txt'' listing contained in the Internet-Drafts
Shadow Directories on ftp.is.co.za (Africa), ftp.nordu.net (Northern
Europe), ftp.nis.garr.it (Southern Europe), munnari.oz.au (Pacific
Rim), ftp.ietf.org (US East Coast), or ftp.isi.edu (US West Coast).
Distribution of this memo is unlimited.
Abstract
This document defines the raw-tcp service type which is a concrete=20
service type of the abstract printer service type defined in [1].
This template is designed to be used in conjuction with the Service
Location Protocol, version 2 defined in [2].
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Contents
Status of This Memo =
i
Abstract =
i
1. Introduction =
1
2. Raw TCP printing =
1
2.1. Service Attributes. . . . . . . . . . . . . . . . . . . . =
1
3. Printer Service Template =
2
A. References =
3
1. Introduction
Service Type templates are used to describe in a standard way those
services which use the service: URL. The template described in this
document extends the abstract service type described in [1], called
printer, with another concrete printer type, called raw-tcp.
2. Raw TCP printing
Printing using TCP for transparent communication between a client
and a print service is common today. How print data, status,
messages, etc is formatted when exchanged across the TCP connection
varies. It is up to the printing client to determine how data should
be formatted and interpreted. This may be determined based on the
information available in the service attributes.
2.1. Service Attributes
Attributes of the Raw TCP printing service includes those
defined in [1]. The following additional semantics applies.
The 'concrete-protocols' attribute value should always be 'tcp'.
The 'abstract-protocols' attribute is optional in [1] and should
not be advertised with the Raw TCP printing service since data
exchanged across the TCP connection isn't defined by the service.
A new optional attribute 'device-id' is defined for the Raw TCP
printing service. This attribute is the Device ID string defined in
IEEE 1284 [3] which may be used to uniqely identify a printer and
match it with a software driver on the printing client.
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3. Printer Service Template
The service template defined below, conforms to the grammar
described in "Service Templates and service: Schemes". Please =
refer
to [4] for detailed explaination of the syntax.
Name of submitter: Mikael Pahmp
Language of service template: en
Security Considerations:
This service neither adds nor detracts from the security of the
opaque data stream itself. The service could be used to obfuscate
or lie about the service endpoint's characteristics if SLP=20
authentication blocks are not used.
Template Text:
-------------------------template begins here-----------------------
template-type=3Dservice:printer:raw-tcp:
template-version=3D0.0
template-description=3D
The printer:raw-tcp: URL describes a transparent bidirectional
communication channel for printing. Print data, status, messages,
etc is written or read by opening a TCP connection to the port in=20
the service URL. How data is formatted and sent across the
connection is decided by the printing client and the print service
and is not defined in this document.
template-url-syntax=3D
url-path =3D ;
concrete-protocols =3D STRING L M
# The names of the concrete protocol types supported
# by the printer abstract service type. Example values
# include http and lpr.
# Is always 'tcp' for this concrete service.
abstract-protocol =3D STRING L O
# The name of the abstract protocol which may be run over
# any concrete types listed. For example, the abstract
# protocol 'ipp' may be run over the concrete types of http
# or 'mailto'.
# Should not be advertised with this concrete service.
device-id=3D STRING L O
# The Device ID string defined in IEEE 1284 which uniqely identifies
# a printer type and model.
--------------------------template ends here------------------------
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Note: The 'concrete-protocols' and 'abstract-protocol' attributes is
defined in [1] but is given a more narrow definition here when used
with the Raw TCP printing service. The 'device-id' attribute is a =
new
attribute defined for this concrete service type.
A. References
[1]P. St. Pierre, S. Isaccson. "Definition of printer: URLs for
use with Service Location", Work in Progress, March 1998.
[2]E. Guttman, C. Perkins, J. Veizades and M. Day. "Service
Location Protocol, Version 2", Work in Progress, November 1998.
[3] "IEEE Std.1284-1994 Standard Signaling Method for a
Bi-directional Parallel Peripheral Interface for Personal
Computers", 1994.
[4]E. Guttman, C. Perkins, J. Kempf, "Service Templates and =
service:
Schemes", Work in Progress, November, 1998
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Full Copyright Statement
Copyright (C) The Internet Society (1997). All Rights Reserved.
This document and translations of it may be copied and furnished to
others, and derivative works that comment on or otherwise explain it
or assist in its implementation may be prepared, copied, published
and distributed, in whole or in part, without restriction of any
kind, provided that the above copyright notice and this paragraph
are included on all such copies and derivative works. However,
this document itself may not be modified in any way, such as by
removing the copyright notice or references to the Internet Society
or other Internet organizations, except as needed for the purpose
of developing Internet standards in which case the procedures
for copyrights defined in the Internet Standards process must be
followed, or as required to translate it into languages other than
English.
The limited permissions granted above are perpetual and will not be
revoked by the Internet Society or its successors or assigns.
This document and the information contained herein is provided on an
"AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE."
Authors' Address
Questions about this memo can be directed to:
Mikael Pahmp
Axis Communications
Scheelev. 16
S - 223 70 Lund
Sweden
Phone: +46 46 270 18 00
email: Mikael.Pahmp@axis.com
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