draft-ietf-ipp-lpd-ipp-map-03.txt   draft-ietf-ipp-lpd-ipp-map-04.txt 
INTERNET-DRAFT Robert Herriot (editor) INTERNET-DRAFT Robert Herriot (editor)
Sun Microsystems, Inc. Sun Microsystems, Inc.
draft-ietf-ipp-lpd-ipp-map-03.txt Tom Hastings draft-ietf-ipp-lpd-ipp-map-04.txt Tom Hastings
Xerox Corporation Xerox Corporation
Norm Jacobs Norm Jacobs
Sun Microsystems, Inc. Sun Microsystems, Inc.
Jay Martin Jay Martin
Underscore, Inc. Underscore, Inc.
December 19, 1997 June 30, 1998
Mapping between LPD and IPP Protocols Mapping between LPD and IPP Protocols
Status of this Memo Status of this Memo
This document is an Internet-Draft. Internet-Drafts are working This document is an Internet-Draft. Internet-Drafts are working
documents of the Internet Engineering Task Force (IETF), its areas, and documents of the Internet Engineering Task Force (IETF), its areas, and
its working groups. Note that other groups may also distribute working its working groups. Note that other groups may also distribute working
documents as Internet-Drafts. documents as Internet-Drafts.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference material time. It is inappropriate to use Internet-Drafts as reference material
or to cite them other than as "work in progress." or to cite them other than as "work in progress."
To learn the current status of any Internet-Draft, please check the To learn the current status of any Internet-Draft, please check the
"1id-abstracts.txt" listing contained in the Internet-Drafts Shadow "1id-abstracts.txt" listing contained in the Internet-Drafts Shadow
Directories on ftp.is.co.za (Africa), nic.nordu.net (Europe), Directories on ftp.is.co.za (Africa), nic.nordu.net (Europe),
munnari.oz.au (Pacific Rim), ds.internic.net (US East Coast), or munnari.oz.au (Pacific Rim), ftp.ietf.org (US East Coast), or
ftp.isi.edu (US West Coast). ftp.isi.edu (US West Coast).
Copyright Notice Copyright Notice
Copyright (C)The Internet Society (1997). All Rights Reserved. Copyright (C)The Internet Society (1997). All Rights Reserved.
Abstract Abstract
This Internet-Draft specifies the mapping between (1) the commands and This document is one of a set of documents, which together describe all
operands of the ''Line Printer Daemon (LPD) Protocol'' specified in RFC aspects of a new Internet Printing Protocol (IPP). IPP is an application
level protocol that can be used for distributed printing using Internet
tools and technologies. The protocol is heavily influenced by the
printing model introduced in the Document Printing Application (DPA)
[ISO10175] standard. Although DPA specifies both end user and
administrative features, IPP version 1.0 (IPP/1.0) focuses only on end
user functionality.
The full set of IPP documents includes:
Design Goals for an Internet Printing Protocol [ipp-req]
(informational)
Rationale for the Structure and Model and Protocol for the Internet
Printing Protocol [ipp-rat] (informational)
Internet Printing Protocol/1.0: Model and Semantics [ipp mod]
Internet Printing Protocol/1.0: Encoding and Transport [ipp-pro]
Jacobs, Martin Expires December 30, 1998
Mapping between LPD and IPP Protocols (this document) (informational)
The design goals document, "Design Goals for an Internet Printing
Protocol", takes a broad look at distributed printing functionality, and
it enumerates real-life scenarios that help to clarify the features that
need to be included in a printing protocol for the Internet. It
identifies requirements for three types of users: end users, operators,
and administrators. The design goals document calls out a subset of end
user requirements that are satisfied in IPP/1.0. Operator and
administrator requirements are out of scope for version 1.0. The
rationale document, "Rationale for the Structure and Model and Protocol
for the Internet Printing Protocol", describes IPP from a high level
view, defines a roadmap for the various documents that form the suite of
IPP specifications, and gives background and rationale for the IETF
working group's major decisions. The document, "Internet Printing
Protocol/1.0: Model and Semantics", describes a simplified model with
abstract objects, their attributes, and their operations. The model
introduces a Printer and a Job. The Job supports multiple documents per
Job. The model document also addresses how security,
internationalization, and directory issues are addressed. The protocol
specification, "Internet Printing Protocol/1.0: Encoding and Transport",
is a formal mapping of the abstract operations and attributes defined in
the model document onto HTTP/1.1. The protocol specification defines the
encoding rules for a new Internet media type called "application/ipp".
The "Mapping between LPD and IPP Protocols" gives some advice to
implementors of gateways between IPP and LPD (Line Printer Daemon)
implementations. It specifies the mapping between (1) the commands and
operands of the "Line Printer Daemon (LPD) Protocol" specified in RFC
1179 and (2) the operations and parameters of the Internet Printing 1179 and (2) the operations and parameters of the Internet Printing
Protocol (IPP). One of the purposes of this document is to compare the Protocol (IPP). One of the purposes of this document is to compare the
functionality of the two protocols. Another purpose is to facilitate functionality of the two protocols. Another purpose is to facilitate
implementation of gateways between LPD and IPP. implementation of gateways between LPD and IPP. This document also
provides an example, which gives additional insight into IPP
This document is an informational document that is not on the standards
track. It is intended to help implementors of gateways between IPP and
LPD. It also provides an example, which gives additional insight into
IPP.
WARNING: RFC 1179 was not on standards track. While RFC 1179 was WARNING: RFC 1179 was not on standards track. While RFC 1179 was
intended to record existing practice, it fell short in some areas. intended to record existing practice, it fell short in some areas.
However, this specification maps between (1) the actual current practice However, this specification maps between (1) the actual current practice
of RFC 1179 and (2) IPP. This document does not attempt to map the of RFC 1179 and (2) IPP. This document does not attempt to map the
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numerous divergent extensions to the LPD protocol that have been made by numerous divergent extensions to the LPD protocol that have been made by
many implementers. many implementers.
Jacobs, Martin Expires June 19, 1998 Jacobs, Martin Expires December 30, 1998
TABLE OF CONTENTS TABLE OF CONTENTS
1. Introduction........................................................3 1. Introduction .......................................................4
2. Terminology.........................................................3 2. Terminology ........................................................4
3. Mapping from LPD Commands to IPP Operations.........................4 3. Mapping from LPD Commands to IPP Operations ........................5
3.1 Print any waiting jobs ...........................................4 3.1 Print any waiting jobs............................................5
3.2 Receive a printer job ............................................4 3.2 Receive a printer job.............................................5
3.2.1 Abort job ....................................................5 3.2.1 Abort job....................................................6
3.2.2 Receive control file .........................................5 3.2.2 Receive control file.........................................7
3.2.3 Receive data file ............................................5 3.2.3 Receive data file............................................7
3.3 Send queue state (short) .........................................6 3.3 Send queue state (short)..........................................7
3.4 Send queue state (long) ..........................................7 3.4 Send queue state (long)...........................................9
3.5 Remove jobs ......................................................8 3.5 Remove jobs......................................................10
4. Mapping of LPD Control File Lines to IPP Parameters.................9 4. Mapping of LPD Control File Lines to IPP Parameters ...............11
4.1 Required Job Functions ...........................................9 4.1 Required Job Functions...........................................12
4.2 Optional Job Functions ..........................................10 4.2 Optional Job Functions...........................................12
4.3 Required Document Functions .....................................10 4.3 Required Document Functions......................................13
4.4 Recommended Document Functions ..................................11 4.4 Recommended Document Functions...................................14
5. Mapping from IPP operations to LPD commands........................11 5. Mapping from IPP operations to LPD commands .......................14
5.1 Print-Job .......................................................11 5.1 Print-Job........................................................15
5.2 Print-URI .......................................................12 5.2 Print-URI........................................................16
5.3 Validate-Job ....................................................12 5.3 Validate-Job.....................................................16
5.4 Create-Job ......................................................12 5.4 Create-Job.......................................................16
5.5 Send-Document ...................................................13 5.5 Send-Document....................................................16
5.6 Send-URI ........................................................13 5.6 Send-URI.........................................................17
5.7 Cancel-Job ......................................................13 5.7 Cancel-Job.......................................................17
5.8 Get-Printer-Attributes ..........................................13 5.8 Get-Printer-Attributes...........................................17
5.9 Get-Job-Attributes ..............................................13 5.9 Get-Job-Attributes...............................................17
5.10 Get-Jobs .......................................................14 5.10 Get-Jobs .......................................................18
6. Mapping of IPP Parameters to LPD Control File Lines................14 6. Mapping of IPP Parameters to LPD Control File Lines ...............18
6.1 Required Job Functions ..........................................15 6.1 Required Job Functions...........................................19
6.2 Optional Job Functions ..........................................15 6.2 Optional Job Functions...........................................19
6.3 Required Document Functions .....................................15 6.3 Required Document Functions......................................20
7. Security...........................................................16 7. Security Considerations ...........................................21
8. References.........................................................16 8. References ........................................................21
9. Author's Addresses.................................................16 9. Author's Addresses ................................................21
10. Appendix A: ABNF Syntax for response of Send-queue-state (short)..17 10.Appendix A: ABNF Syntax for response of Send-queue-state (short) ..22
11. Appendix B: ABNF Syntax for response of Send-queue-state (long)...17 11.Appendix B: ABNF Syntax for response of Send-queue-state (long) ...22
12. Appendix C: Unsupported LPD functions.............................18 12.Appendix C: Unsupported LPD functions .............................23
13. Appendix D: Full Copyright Statement..............................18 13.Appendix D: Full Copyright Statement ..............................24
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Mapping between the LPD and IPP Protocols Mapping between the LPD and IPP Protocols
1. Introduction 1. Introduction
The reader of this specification is expected to be familiar with the IPP The reader of this specification is expected to be familiar with the IPP
Model and Semantics specification [ipp-mod], the IPP Protocol Model and Semantics specification [ipp-mod], the IPP Encoding and
specification [ipp-pro], and the Line Printer Daemon (LPD) protocol Transport [ipp-pro], and the Line Printer Daemon (LPD) protocol
specification [rfc1179] as described in RFC 1179. specification [rfc1179] as described in RFC 1179.
RFC 1179 was written in 1990 in an attempt to document existing LPD RFC 1179 was written in 1990 in an attempt to document existing LPD
protocol implementations. Since then, a number of undocumented protocol implementations. Since then, a number of undocumented
extensions have been made by vendors to support functionality specific extensions have been made by vendors to support functionality specific
to their printing solutions. All of these extensions consist of to their printing solutions. All of these extensions consist of
additional control file commands. This document does not address any of additional control file commands. This document does not address any of
these vendor extensions. Rather it addresses existing practice within these vendor extensions. Rather it addresses existing practice within
the context of the features described by RFC 1179. Deviations of the context of the features described by RFC 1179. Deviations of
existing practice from RFC 1179 are so indicated. existing practice from RFC 1179 are so indicated.
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protocol to the LPD protocol. The former is called the "LPD-to-IPP protocol to the LPD protocol. The former is called the "LPD-to-IPP
mapper" and the latter is called the "IPP-to-LPD mapper". mapper" and the latter is called the "IPP-to-LPD mapper".
This document is an informational document that is not on the standards This document is an informational document that is not on the standards
track. It is intended to help implementors of gateways between IPP and track. It is intended to help implementors of gateways between IPP and
LPD. It also provides an example, which gives additional insight into LPD. It also provides an example, which gives additional insight into
IPP. IPP.
2. Terminology 2. Terminology
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", The key words "MUST", "MUST NOT", "REQUIRED", MUSTMUST"SHOULD", "SHOULD
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be
document are to be interpreted as described in RFC 2119 [abnf]. interpreted as described in RFC 2119 [abnf].
RFC 1179 uses the word "command" in two contexts: for over-the-wire RFC 1179 uses the word "command" in two contexts: for over-the-wire
operations and for command file functions. This document SHALL use the operations and for command file functions. This document uses the word
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word "command" for the former and the phrase "functions" for the latter. "command" for the former and the phrase "functions" for the latter. The
The syntax of the LPD commands is given using ABNF [abnf]. syntax of the LPD commands is given using ABNF [abnf].
The following tokens are used in order to make the syntax more readable: The following tokens are used in order to make the syntax more readable:
LF stands for %x0A (linefeed) LF stands for %x0A (linefeed)
SP stands for %x20. (space) SP stands for %x20. (space)
DIGIT stands for %x30-39 ("0" to "9") DIGIT stands for %x30-39 ("0" to "9")
3. Mapping from LPD Commands to IPP Operations 3. Mapping from LPD Commands to IPP Operations
This section describes the mapping from LPD commands to IPP operations. This section describes the mapping from LPD commands to IPP operations.
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3.1 Print any waiting jobs 3.1 Print any waiting jobs
Command syntax: Command syntax:
print-waiting-jobs = %x01 printer-name LF print-waiting-jobs = %x01 printer-name LF
This command causes the LPD daemon check its queue and print any waiting This command causes the LPD daemon check its queue and print any waiting
jobs. An IPP printer handles waiting jobs without such a nudge. jobs. An IPP printer handles waiting jobs without such a nudge.
If the mapper receives this LPD command, it SHALL ignore it and send no If the mapper receives this LPD command, it MUSTMUST ignore it and send
IPP operation. no IPP operation.
3.2 Receive a printer job 3.2 Receive a printer job
Command syntax: Command syntax:
receive-job = %x02 printer-name LF receive-job = %x02 printer-name LF
The control file and data files mentioned in the following paragraphs The control file and data files mentioned in the following paragraphs
are received via LPD sub-commands that follow this command. Their are received via LPD sub-commands that follow this command. Their
mapping to IPP commands and attributes is described later in this mapping to IPP commands and attributes is described later in this
section. section.
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The mapper maps the 'Receive a printer job' command to either: The mapper maps the 'Receive a printer job' command to either:
. the Print-Job operation which includes a single data file or . the Print-Job operation which includes a single data file or
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. the Create-Job operation followed by one Send-Document . the Create-Job operation followed by one Send-Document
operation for each data file. operation for each data file.
If the IPP printer supports both Create-Job and Send-Document, and if a If the IPP printer supports both Create-Job and Send-Document, and if a
job consists of: job consists of:
. a single data file, the mapper SHOULD use the Print-Job . a single data file, the mapper SHOULD use the Print-Job
operation, but MAY use the Create-Job and Send-Document operation, but MAY use the Create-Job and Send-Document
operations. operations.
. more than one data file, the mapper SHALL use Create-Job . more than one data file, the mapper MUST use Create-Job
followed by one Send-Document for each received LPD data file. followed by one Send-Document for each received LPD data file.
If the IPP printer does not support both Create-Job and Send-Document, If the IPP printer does not support both Create-Job and Send-Document,
and if a job consists of: and if a job consists of:
. a single data file, the mapper SHALL use the PrintJob . a single data file, the mapper MUST use the PrintJob
operation. operation.
. more than one data file, the mapper SHALL submit each received . more than one data file, the mapper MUST submit each received
LPD data file as a separate Print-Job operation (thereby LPD data file as a separate Print-Job operation (thereby
converting a single LPD job into multiple IPP jobs). converting a single LPD job into multiple IPP jobs).
If the mapper uses Create-Job and Send-Document, it MUST send the If the mapper uses Create-Job and Send-Document, it MUST send the
Create-Job operation before it sends any Send-Document operations Create-Job operation before it sends any Send-Document operations
whether the LPD control file, which supplies attributes for Create-Job, whether the LPD control file, which supplies attributes for Create-Job,
arrives before or after all LPD data files. arrives before or after all LPD data files.
NOTE: This specification does not specify how the mapper maps: the LPD NOTE: This specification does not specify how the mapper maps: the LPD
Printer-name operand to the IPP "printer-uri" parameter. Printer-name operand to the IPP "printer-uri" parameter.
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3.2.1 Abort job 3.2.1 Abort job
Sub-command syntax: Sub-command syntax:
abort-job = %x1 LF abort-job = %x1 LF
This sub-command of receive-a-printer-job is intended to abort any job This sub-command of receive-a-printer-job is intended to abort any job
transfer in process. transfer in process.
If the mapper receives this sub-command, it SHALL cancel the job that it If the mapper receives this sub-command, it MUST cancel the job that it
is in the process of transmitting. is in the process of transmitting.
If the mapper is in the process of sending a Print-Job or Create-Job If the mapper is in the process of sending a Print-Job or Create-Job
operation, it terminates the job either by closing the connection, or operation, it terminates the job either by closing the connection, or
performing the Cancel-Job operation with the job-uri that it received performing the Cancel-Job operation with the job-uri that it received
from the Print-Job or Create-Job operation. from the Print-Job or Create-Job operation.
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NOTE: This sub-command is implied if at any time the connection between NOTE: This sub-command is implied if at any time the connection between
the LPD client and server is terminated before an entire print job has the LPD client and server is terminated before an entire print job has
been transferred via an LPD Receive-a-printer-job request. been transferred via an LPD Receive-a-printer-job request.
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3.2.2 Receive control file 3.2.2 Receive control file
Sub-command syntax: Sub-command syntax:
receive-control-file = %x2 number-of-bytes SP name-of-control-file LF receive-control-file = %x2 number-of-bytes SP name-of-control-file LF
number-of-bytes = 1*DIGIT number-of-bytes = 1*DIGIT
name-of-control-file = "cfA" job-number client-host-name name-of-control-file = "cfA" job-number client-host-name
; e.g. "cfA123woden" ; e.g. "cfA123woden"
job-number = 3DIGIT job-number = 3DIGIT
client-host-name = <a host name> client-host-name = <a host name>
This sub-command is roughly equivalent to the IPP Create-Job operation. This sub-command is roughly equivalent to the IPP Create-Job operation.
The mapper SHALL use the contents of the received LPD control file to The mapper MUST use the contents of the received LPD control file to
create IPP parameter and attribute values to transmit with the Print-Job create IPP parameter and attribute values to transmit with the Print-Job
or Create-Job operation. or Create-Job operation.
3.2.3 Receive data file 3.2.3 Receive data file
Sub-command syntax: %x3 number-of-bytes-in-data-file Name-of-data-file Sub-command syntax: %x3 number-of-bytes-in-data-file Name-of-data-file
receive-data-file = %x03 number-of-bytes SP name-of-data-file LF receive-data-file = %x03 number-of-bytes SP name-of-data-file LF
number-of-bytes = 1*DIGIT number-of-bytes = 1*DIGIT
name-of-data-file = "df" letter job-number client-host-name name-of-data-file = "df" letter job-number client-host-name
; e.g. "dfA123woden for the first file ; e.g. "dfA123woden for the first file
letter = %x41-5A / %x61-7A ; "A" " to Z", "a" to "z" letter = %x41-5A / %x61-7A ; "A" to "Z", "a" to "z"
; first file is "A", ; first file is "A",
; second "B", and 52nd file is "z" ; second "B", and 52nd file is "z"
job-number = 3DIGIT job-number = 3DIGIT
client-host-name = <a host name> client-host-name = <a host name>
This sub-command is roughly equivalent to the IPP Send-Document This sub-command is roughly equivalent to the IPP Send-Document
operation. operation.
The mapper SHALL use the contents of the received LPD data file as the The mapper MUST use the contents of the received LPD data file as the
data to transmit with the IPP Print-Job or Send-Document operation. data to transmit with the IPP Print-Job or Send-Document operation.
Although RFC-1179 alludes to a method for passing an unspecified Although RFC-1179 alludes to a method for passing an unspecified
length data file by using an octet-count of zero, no implementations length data file by using an octet-count of zero, no implementations
support this feature.. The mapper SHALL reject a job that has a value of support this feature.. The mapper MUST reject a job that has a value of
0 in the number-of-bytes field. 0 in the number-of-bytes field.
3.3 Send queue state (short) 3.3 Send queue state (short)
Command syntax: Command syntax:
send-queue-short = %x03 printer-name *(SP(user-name / job-number)) LF send-queue-short = %x03 printer-name *(SP(user-name / job-number)) LF
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The mapper's response to this command includes information about the The mapper's response to this command includes information about the
printer and its jobs. RFC 1179 specifies neither the information nor the printer and its jobs. RFC 1179 specifies neither the information nor the
format of its response. This document requires the mapper to follow format of its response. This document requires the mapper to follow
existing practice as specified in this document. existing practice as specified in this document.
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The mapper SHALL produce a response in the following format which The mapper MUST produce a response in the following format which
consists of a printer-status line optionally followed by a heading line, consists of a printer-status line optionally followed by a heading line,
and a list of jobs. This format is defined by examples below. Appendix A and a list of jobs. This format is defined by examples below. Appendix A
contains the ABNF syntax. contains the ABNF syntax.
For an printer with no jobs, the response starts in column 1 and is: For an printer with no jobs, the response starts in column 1 and is:
no entries no entries
For a printer with jobs, an example of the response is: For a printer with jobs, an example of the response is:
killtree is ready and printing pinetree is ready and printing
Rank Owner Job Files Total Size Rank Owner Job Files Total Size
active fred 123 stuff 1204 bytes active fred 123 stuff 1204 bytes
1st smith 124 resume, foo 34576 bytes 1st smith 124 resume, foo 34576 bytes
2nd fred 125 more 99 bytes 2nd fred 125 more 99 bytes
3rd mary 126 mydoc 378 bytes 3rd mary 126 mydoc 378 bytes
4th jones 127 statistics.ps 4567 bytes 4th jones 127 statistics.ps 4567 bytes
5th fred 128 data.txt 9 bytes 5th fred 128 data.txt 9 bytes
The column numbers of above headings and job entries are: The column numbers of above headings and job entries are:
| | | | | | | | | |
01 08 19 35 63 01 08 19 35 63
The mapper SHALL produce each field above from the following IPP The mapper MUST produce each field above from the following IPP
attribute: attribute:
LPD field IPP attribute special conversion details LPD field IPP attribute special conversion details
printer- printer-state and For a printer-state of idle or printer- printer-state and For a printer-state of idle or
status printer-state-reasons processing, the mapper SHALL use status printer-state-reasons processing, the mapper MUST use
the formats above. For stopped, the formats above. For stopped,
the mapper SHALL use printer- the mapper MUST use printer-state-
state-reasons to produce an reasons to produce an unspecified
unspecified format for the error. format for the error.
rank number-of- the mapper SHALL the format above
rank number-of- the mapper MUST the format above
intervening-jobs intervening-jobs
owner job-originating-user- unspecified conversion; job- owner job-originating-user- unspecified conversion; job-
name originating-user-name may be the name originating-user-name may be the
mapper's user-name mapper's user-name
job job-id the mapper shall use the job-id
files document-name the mapper shall create a comma job job-id the mapper MUST use the job-id
files document-name the mapper MUST create a comma
separated list of the document- separated list of the document-
names and then truncate this list names and then truncate this list
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LPD field IPP attribute special conversion details
to the first 24 characters to the first 24 characters
total- job-k- the mapper shall multiple the
size octets*copies*1024 value of job-k-octets by 1024 and total- job-k- the mapper MUST multiple the value
by the value of the "copies" size octets*copies*1024 of job-k-octets by 1024 and by the
attribute. value of the "copies" attribute.
A mapper SHOULD use the job attribute number-of-intervening-jobs rather A mapper SHOULD use the job attribute number-of-intervening-jobs rather
than the job's position in a list of jobs to determine `rank' because a than the job's position in a list of jobs to determine `rank' because a
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Printer may omit jobs that it wants to keep secret. If a printer doesn't Printer may omit jobs that it wants to keep secret. If a printer doesn't
support the job attribute number-of-intervening-jobs, a mapper MAY use support the job attribute number-of-intervening-jobs, a mapper MAY use
the job's position. the job's position.
Note: a Printer may set the value of job-originating-user-name to the Note: a Printer may set the value of job-originating-user-name to the
authenticated user or to the value of "requesting-user-name", depending authenticated user or to the value of "requesting-user-name", depending
on the implementation and configuration. For a gateway, the on the implementation and configuration. For a gateway, the
authenticated user is the user-id of the gateway, but the "requesting- authenticated user is the user-id of the gateway, but the "requesting-
user-name" may contain the name of the user who is the gateway's client. user-name" may contain the name of the user who is the gateway's client.
In order to obtain the information specified above, The LPD-to-IPP In order to obtain the information specified above, The LPD-to-IPP
mapper SHALL use the Get-Printer-Attributes operation to get printer- mapper MUST use the Get-Printer-Attributes operation to get printer-
status and SHOULD use the Get-Jobs operation to get information about status and SHOULD use the Get-Jobs operation to get information about
all of the jobs. If the LPD command contains job-numbers or user-names, all of the jobs. If the LPD command contains job-numbers or user-names,
the mapper MAY handle the filtering of the response. If the LPD command the mapper MAY handle the filtering of the response. If the LPD command
contains job-numbers but no user-names, the mapper MAY use Get-Job- contains job-numbers but no user-names, the mapper MAY use Get-Job-
Attributes on each converted job-number rather than Get-Jobs. If the LPD Attributes on each converted job-number rather than Get-Jobs. If the LPD
command contains a single user-name but no job-numbers, the mapper MAY command contains a single user-name but no job-numbers, the mapper MAY
use Get-Jobs with the my-jobs option if the server supports this option use Get-Jobs with the my-jobs option if the server supports this option
and if the server allows the client to be a proxy for the LPD user. and if the server allows the client to be a proxy for the LPD user.
NOTE: This specification does not define how the mapper maps the LPD NOTE: This specification does not define how the mapper maps the LPD
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Command syntax: Command syntax:
send-queue-long = %x04 printer-name *(SP(user-name / job-number)) LF send-queue-long = %x04 printer-name *(SP(user-name / job-number)) LF
The mapper's response to this command includes information about the The mapper's response to this command includes information about the
printer and its jobs. RFC 1179 specifies neither the information nor the printer and its jobs. RFC 1179 specifies neither the information nor the
format of its response. This document requires the mapper to follow format of its response. This document requires the mapper to follow
existing practice as specified in this document. existing practice as specified in this document.
The mapper SHALL produce a response in the following format which The mapper MUST produce a response in the following format which
consists of a printer-status line optionally followed a list of jobs, consists of a printer-status line optionally followed a list of jobs,
where each job consists of a blank line, a description line, and one where each job consists of a blank line, a description line, and one
line for each file. The description line contains the user-name, rank, line for each file. The description line contains the user-name, rank,
job-number and host. This format is defined by examples below. Appendix job-number and host. This format is defined by examples below. Appendix
B contain the ABNF syntax. B contain the ABNF syntax.
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For an printer with no jobs the response is: For an printer with no jobs the response is:
no entries no entries
For a printer with jobs, an example of the response is: For a printer with jobs, an example of the response is:
killtree is ready and printing pinetree is ready and printing
fred: active [job 123 tiger] fred: active [job 123 tiger]
2 copies of stuff 602 bytes 2 copies of stuff 602 bytes
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smith: 1st [job 124 snail] smith: 1st [job 124 snail]
2 copies of resume 7088 bytes 2 copies of resume 7088 bytes
2 copies of foo 10200 bytes 2 copies of foo 10200 bytes
fred: 2nd [job 125 tiger] fred: 2nd [job 125 tiger]
more 99 bytes more 99 bytes
The column numbers of above headings and job entries are: The column numbers of above headings and job entries are:
| | | | | |
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sizes in the "size" field times the value of the "copies" field sizes in the "size" field times the value of the "copies" field
produces the value for the "Total Size" field in the short form. For produces the value for the "Total Size" field in the short form. For
fields other than the host and copies fields, see the preceding section. fields other than the host and copies fields, see the preceding section.
For the host field see the table below. For the host field see the table below.
LPD field IPP attribute special conversion details LPD field IPP attribute special conversion details
host unspecified conversion; job- host unspecified conversion; job-
originating-host may be the originating-host may be the
mapper's host mapper's host
copies copies the mapper shall assume the
value of copies precedes the copies copies the mapper MUST assume the value
string "copies of "; otherwise, of copies precedes the string
the value of copies is 1. "copies of "; otherwise, the
value of copies is 1.
NOTE: This specification does not define how the mapper maps the LPD NOTE: This specification does not define how the mapper maps the LPD
Printer-name operand to the IPP printer-uri parameter. Printer-name operand to the IPP printer-uri parameter.
3.5 Remove jobs 3.5 Remove jobs
Command syntax: Command syntax:
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remove-jobs = %x05 printer-name SP agent remove-jobs = %x05 printer-name SP agent
*(SP(user-name / job-number)) LF *(SP(user-name / job-number)) LF
The agent operand is the user-name of the user initiating the remove- The agent operand is the user-name of the user initiating the remove-
jobs command. The special user-name 'root' indicates a privileged user jobs command. The special user-name 'root' indicates a privileged user
who can remove jobs whose user-name differs from the agent.. who can remove jobs whose user-name differs from the agent..
The mapper SHALL issue one Cancel-Job operation for each job referenced The mapper MUST issue one Cancel-Job operation for each job referenced
by the remove-jobs command. Each job-number in the remove-jobs command by the remove-jobs command. Each job-number in the remove-jobs command
references a single job. Each user-name in the remove-jobs command references a single job. Each user-name in the remove-jobs command
implicitly references all jobs owned by the specified user. The active implicitly references all jobs owned by the specified user. The active
job is implicitly referenced when the remove-jobs command contains job is implicitly referenced when the remove-jobs command contains
neither job-numbers nor user-names. The mapper MAY use Get-Jobs to neither job-numbers nor user-names. The mapper MAY use Get-Jobs to
determine the job-uri of implicitly referenced jobs. determine the job-uri of implicitly referenced jobs.
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The mapper SHALL not use the agent name of `root' when end-users cancel The mapper MUST not use the agent name of `root' when end-users cancel
their own jobs. Violation of this rule creates a potential security their own jobs. Violation of this rule creates a potential security
violation, and it may cause the printer to issue a notification that violation, and it may cause the printer to issue a notification that
misleads a user into thinking that some other person canceled the job. misleads a user into thinking that some other person canceled the job.
If the agent of a remove-jobs command for a job J is the same as the If the agent of a remove-jobs command for a job J is the same as the
user name specified with the `P' function in the control file for job J, user name specified with the `P' function in the control file for job J,
then the mapper SHALL ensure that the caller of the Cancel-Job command then the mapper MUST ensure that the caller of the Cancel-Job command
for job J is the same as job-originating-user for job J. for job J is the same as job-originating-user for job J.
Note: This requirement means that a mapper must be consistent in who the Note: This requirement means that a mapper must be consistent in who the
receiver perceives as the caller of IPP operations. The mapper either receiver perceives as the caller of IPP operations. The mapper either
acts as itself or acts on behalf of another user. The latter is acts as itself or acts on behalf of another user. The latter is
preferable if it is possible. This consistency is necessary between preferable if it is possible. This consistency is necessary between
Print-Job/Create-Job and Cancel-Job in order for Cancel-Job to work, but Print-Job/Create-Job and Cancel-Job in order for Cancel-Job to work, but
it is also desirable for other operations. For example, Get-Jobs may it is also desirable for other operations. For example, Get-Jobs may
give more information about job submitted by the caller of this give more information about job submitted by the caller of this
operation. operation.
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This section describes the mapping from LPD control file lines (called This section describes the mapping from LPD control file lines (called
`functions') to IPP operation input parameters. The mapper receives the `functions') to IPP operation input parameters. The mapper receives the
control file lines via the LPD receive-control-file sub-command.. Each control file lines via the LPD receive-control-file sub-command.. Each
of the LPD functions appear as sub-sections of section 7 of RFC 1179. of the LPD functions appear as sub-sections of section 7 of RFC 1179.
In LPD control file lines, the text operands have a maximum length of 31 In LPD control file lines, the text operands have a maximum length of 31
or 99 while IPP input parameters have a maximum of 255 characters. or 99 while IPP input parameters have a maximum of 255 characters.
Therefore, no data is lost. Therefore, no data is lost.
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The mapper converts each supported LPD function to its corresponding IPP The mapper converts each supported LPD function to its corresponding IPP
parameter as defined by tables in the subsections that follow. These parameter as defined by tables in the subsections that follow. These
subsections group functions according to whether they are: subsections group functions according to whether they are:
. required with a job, . required with a job,
. optional with a job . optional with a job
. required with each document. . required with each document.
In the tables below, each LPD value is given a name, such as `h'. If an In the tables below, each LPD value is given a name, such as `h'. If an
IPP value uses the LPD value, then the IPP value column contains the LPD IPP value uses the LPD value, then the IPP value column contains the LPD
name, such as `h' to denote this. Otherwise, the IPP value column name, such as `h' to denote this. Otherwise, the IPP value column
specifies the literal value. specifies the literal value.
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4.1 Required Job Functions 4.1 Required Job Functions
The following LPD functions MUST be in a received LPD job. The mapper The following LPD functions MUST be in a received LPD job. The mapper
SHALL receive each of the following LPD functions and SHALL include the MUST receive each of the following LPD functions and MUST include the
information as a parameter with each IPP job. The functions SHOULD be in information as a parameter with each IPP job. The functions SHOULD be in
the order `H', `P' and they SHOULD be the first two functions in the the order `H', `P' and they SHOULD be the first two functions in the
control file, but they MAY be anywhere in the control file and in any control file, but they MAY be anywhere in the control file and in any
order. order.
LPD function IPP LPD function IPP
name value description name value name value description name value
H h Originating Host h (in security layer) H h Originating Host h (in security layer)
P u User identification requesting- u (and in security P u User identification requesting- u (and in security
user-name layer) user-name layer)
none ipp- `true' none ipp- `true'
attribute- attribute-
fidelity fidelity
A mapper MAY sends its own host rather than the client's host, and a A mapper MAY sends its own host rather than the client's host, and a
mapper MAY send its own user-name as user identification rather than the mapper MAY send its own user-name as user identification rather than the
client user. But in any case, the values sent SHALL be compatible with client user. But in any case, the values sent MUST be compatible with
the Cancel-Job operation. The IPP operation MAY have no way to specify the Cancel-Job operation. The IPP operation MAY have no way to specify
an originating host-name. an originating host-name.
The mapper SHALL include ipp-attribute-fidelity =true so that it doesn't The mapper MUST include ipp-attribute-fidelity =true so that it doesn't
have to determine which attributes a printer supports. have to determine which attributes a printer supports.
4.2 Optional Job Functions 4.2 Optional Job Functions
The following LPD functions MAY be in a received job. These function The following LPD functions MAY be in a received job. These function
SHOULD follow the required job functions and precede the document SHOULD follow the required job functions and precede the document
functions, but they MAY be anywhere in the control file. functions, but they MAY be anywhere in the control file.
If the mapper receives such an LPD function, the mapper SHALL include Jacobs, Martin Expires December 30, 1998
the corresponding IPP attribute with the value converted as specified in
the table below. If the mapper does not receive such an LPD attribute, If the mapper receives such an LPD function, the mapper MUST include the
the mapper SHALL NOT include the corresponding IPP attribute, except the corresponding IPP attribute with the value converted as specified in the
`L' LPD function whose absence has a special meaning as noted in the table below. If the mapper does not receive such an LPD attribute, the
table. mapper MUST NOT include the corresponding IPP attribute, except the `L'
LPD function whose absence has a special meaning as noted in the table.
LPD function IPP LPD function IPP
name value description name value name value description name value
J j Job name for job-name j J j Job name for job-name j
banner page banner page
L l Print banner page job-sheets `standard' if `L' is L l Print banner page job-sheets `standard' if `L' is
present present
`none' if `L' is present `none' if `L' is present
M m Mail When Printed IPP has no notification M m Mail When Printed IPP has no notification
mechanism. To support mechanism. To support
this LPD feature, the this LPD feature, the
gateway must poll gateway must poll
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.
4.3 Required Document Functions 4.3 Required Document Functions
The mapper SHALL receive one set of the required document functions with The mapper MUST receive one set of the required document functions with
each copy of a document, and SHALL include the converted information as each copy of a document, and MUST include the converted information as
parameters with each IPP document parameters with each IPP document
If the control file contains required and recommended document If the control file contains required and recommended document
functions, the required functions SHOULD precede the recommended ones functions, the required functions SHOULD precede the recommended ones
and if the job contains multiple documents, all the functions for each and if the job contains multiple documents, all the functions for each
document are grouped together as shown in the example of section 6.3 document are grouped together as shown in the example of section 6.3
"Required Document Functions". However, the document functions MAY be in "Required Document Functions". However, the document functions MAY be in
any order. any order.
LPD function IPP LPD function IPP
name valu description name value
e name value description name value
f fff Print formatted document-format 'application/octet- f fff Print formatted document-format 'application/octet-
file stream' file stream'
l fff Print file leaving document-format 'application/octet- l fff Print file leaving document-format 'application/octet-
control characters stream' control characters stream'
o fff Print Postscript document-format 'application/PostScri
output file pt' o fff Print Postscript document-format 'application/
output file PostScript'
copies see note copies see note
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Note: In practice, the `f' LPD function is often overloaded. It is often Note: In practice, the `f' LPD function is often overloaded. It is often
used with any format of document data including PostScript and PCL data. used with any format of document data including PostScript and PCL data.
Note: In practice, the `l' LPD function is often used as a rough Note: In practice, the `l' LPD function is often used as a rough
equivalent to the `f' function. equivalent to the `f' function.
Note: When RFC 1179 was written, no implementation supported the `o' Note: When RFC 1179 was written, no implementation supported the `o'
function; instead `f' was used for PostScript. Windows NT now sends `o' function; instead `f' was used for PostScript. Windows NT now sends `o'
function for a PostScript file. function for a PostScript file.
Note: the value `fff' of the `f', `l' and `o' functions is the name of Note: the value `fff' of the `f', `l' and `o' functions is the name of
the data file as transferred, e.g. "dfA123woden". the data file as transferred, e.g. "dfA123woden".
If the mapper receives any other lower case letter, the mapper SHALL If the mapper receives any other lower case letter, the mapper MUST
reject the job because the document contains a format that the mapper reject the job because the document contains a format that the mapper
does not support. does not support.
The mapper determines the number of copies by counting the number of The mapper determines the number of copies by counting the number of
occurrences of each `fff' file with one of the lower-case functions occurrences of each `fff' file with one of the lower-case functions
above. For example, if `f dfA123woden' occurs 4 times, then copies has a above. For example, if `f dfA123woden' occurs 4 times, then copies has a
value of 4. Although the LPD protocol allows the value of copies to be value of 4. Although the LPD protocol allows the value of copies to be
different for each document, the commands and the receiving print different for each document, the commands and the receiving print
systems don't support this. systems don't support this.
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4.4 Recommended Document Functions 4.4 Recommended Document Functions
The mapper SHOULD receive one set of the recommended document functions The mapper SHOULD receive one set of the recommended document functions
with each document, and SHOULD include the converted information as with each document, and SHOULD include the converted information as
parameters with each IPP document. The functions SHOULD be received in parameters with each IPP document. The functions SHOULD be received in
the order `U' and `N', but they MAY arrive in any order. the order `U' and `N', but they MAY arrive in any order.
LPD function IPP LPD function IPP
name value description name value name value description name value
U fff ignored U fff ignored
N n Name of source file document-name n N n Name of source file document-name n
Note: the value `fff' of the `U' function is the name of the data file Note: the value `fff' of the `U' function is the name of the data file
as transferred, e.g. "dfA123woden". as transferred, e.g. "dfA123woden".
5. Mapping from IPP operations to LPD commands 5. Mapping from IPP operations to LPD commands
If the IPP-to-LPD mapper receives an IPP operation, the following table If the IPP-to-LPD mapper receives an IPP operation, the following table
summarizes the LPD command that it uses. Each section below gives the summarizes the LPD command that it uses. Each section below gives the
detail. Each of the following sub-sections appear as sub-sections of detail. Each of the following sub-sections appear as sub-sections of
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as transferred, e.g. "dfA123woden". as transferred, e.g. "dfA123woden".
5. Mapping from IPP operations to LPD commands 5. Mapping from IPP operations to LPD commands
If the IPP-to-LPD mapper receives an IPP operation, the following table If the IPP-to-LPD mapper receives an IPP operation, the following table
summarizes the LPD command that it uses. Each section below gives the summarizes the LPD command that it uses. Each section below gives the
detail. Each of the following sub-sections appear as sub-sections of detail. Each of the following sub-sections appear as sub-sections of
section 3 in the document "Internet Printing Protocol/1.0: Model and section 3 in the document "Internet Printing Protocol/1.0: Model and
Semantics" [ipp-mod]. Semantics" [ipp-mod].
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IPP operation LPD command IPP operation LPD command
Print-Job or Print-URI or receive-a-printer-job Print-Job or Print-URI or receive-a-printer-job
Create-Job/Send-Document/Send-URI and then print-any-waiting-jobs Create-Job/Send-Document/Send-URI and then print-any-waiting-jobs
Validate-Job implemented by the mapper Validate-Job implemented by the mapper
Cancel-Job remove-jobs Cancel-Job remove-jobs
Get-Printer-Attributes, Get-Job- send queue state (short or long) Get-Printer-Attributes, Get-Job- send queue state (short or long)
Attributes or Get-Jobs Attributes or Get-Jobs
5.1 Print-Job 5.1 Print-Job
The mapper SHALL send the following commands in the order listed below: The mapper MUST send the following commands in the order listed below:
. receive-a-printer-job command . receive-a-printer-job command
. both receive-control-file sub-command and receive-data-file . both receive-control-file sub-command and receive-data-file
sub-command sub-command
(unspecified order, see Note below) (unspecified order, see Note below)
. print-any-waiting-jobs command, . print-any-waiting-jobs command,
except that if the mapper is sending a sequence of receive-a- except that if the mapper is sending a sequence of receive-a-
printer-job commands, it MAY omit sending print-any-waiting- printer-job commands, it MAY omit sending print-any-waiting-
jobs after any receive-a printer-job command that is neither jobs after any receive-a printer-job command that is neither
the first nor last command in this sequence the first nor last command in this sequence
Note: it is recommended that the order of the receive-control-file sub- Note: it is recommended that the order of the receive-control-file sub-
command and the receive-data-file sub-command be configurable because command and the receive-data-file sub-command be configurable because
either order fails for some print systems. Some print systems assume either order fails for some print systems. Some print systems assume
that the control file follows all data files and start printing that the control file follows all data files and start printing
immediately on receipt of the control file. When such a print system immediately on receipt of the control file. When such a print system
tries to print a data file that has not arrived, it produces an error. tries to print a data file that has not arrived, it produces an error.
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Other print systems assume that the control file arrives before the data Other print systems assume that the control file arrives before the data
files and start printing when the first data file arrives. Such a system files and start printing when the first data file arrives. Such a system
ignores the control information, such as banner page or copies. ignores the control information, such as banner page or copies.
NOTE: This specification does not define the mapping between the IPP NOTE: This specification does not define the mapping between the IPP
printer-uri and the LPD printer-name. printer-uri and the LPD printer-name.
The mapper SHALL send the IPP parameters and attributes received from The mapper MUST send the IPP parameters and attributes received from the
the operation to the LPD printer by using the LPD receive-control-file operation to the LPD printer by using the LPD receive-control-file sub-
sub-command. The mapper SHALL create the LPD job-number for use in the command. The mapper MUST create the LPD job-number for use in the
control file name, but the receiving printer MAY, in some circumstances, control file name, but the receiving printer MAY, in some circumstances,
assign a different job-number to the job. The mapper SHALL create the assign a different job-number to the job. The mapper MUST create the IPP
IPP job-id and IPP job-uri returned in the Print-Job response. job-id and IPP job-uri returned in the Print-Job response.
NOTE: This specification does not specify how the mapper determines the NOTE: This specification does not specify how the mapper determines the
LPD job-number, the IPP job-id or the IPP job-uri of a job that it LPD job-number, the IPP job-id or the IPP job-uri of a job that it
creates nor does it specify the relation ship between the IPP job-uri, creates nor does it specify the relation ship between the IPP job-uri,
IPP the job-id and the LPD job-number, both of which the mapper creates. IPP the job-id and the LPD job-number, both of which the mapper creates.
However, it is likely that the mapper will use the same integer value However, it is likely that the mapper will use the same integer value
for both theLPD job-number and the IPP job-id, and that the IPP Job-uri for both theLPD job-number and the IPP job-id, and that the IPP Job-uri
is the printer's URI with the job-id concatenated on the end. is the printer's URI with the job-id concatenated on the end.
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The mapper SHALL send data received in the IPP operation to the LPD The mapper MUST send data received in the IPP operation to the LPD
printer by using the LPD receive-data-file sub-command. The mapper SHALL printer by using the LPD receive-data-file sub-command. The mapper MUST
specify the exact number of bytes being transmitted in the number-of- specify the exact number of bytes being transmitted in the number-of-
bytes field of the receive-data-file sub-command. It SHALL NOT use a bytes field of the receive-data-file sub-command. It MUST NOT use a
value of 0 in this field. value of 0 in this field.
If the mapper, while it is transmitting a receive-a-printer-job command If the mapper, while it is transmitting a receive-a-printer-job command
or sub-command, either detects that its IPP connection has closed or or sub-command, either detects that its IPP connection has closed or
receives a Cancel-Job operation, the mapper SHALL terminate the LPD job receives a Cancel-Job operation, the mapper MUST terminate the LPD job
either with the abort sub-command or the remove-jobs command. either with the abort sub-command or the remove-jobs command.
ISSUE: error code conversion. Error code conversion is not specified in this document..
5.2 Print-URI 5.2 Print-URI
The mapper SHALL handle this operation in the same way as a Print-Job The mapper MUST handle this operation in the same way as a Print-Job
operation except that it SHALL obtain data referenced by the "document- operation except that it MUST obtain data referenced by the "document-
uri" parameter and SHALL then treat that data as if it had been received uri" parameter and MUST then treat that data as if it had been received
via a Print-Job operation. via a Print-Job operation.
5.3 Validate-Job 5.3 Validate-Job
The mapper SHALL perform this operation directly. Because LPD supports The mapper MUST perform this operation directly. Because LPD supports
very few attributes, this operation doesn't have much to check. very few attributes, this operation doesn't have much to check.
5.4 Create-Job 5.4 Create-Job
The mapper SHALL handle this operation like Print-Job, except The mapper MUST handle this operation like Print-Job, except
Jacobs, Martin Expires June 19, 1998 . the mapper MUST send the control file after it has received
. the mapper SHALL send the control file after it has received
the last Send-Document or Send-URI operation because the the last Send-Document or Send-URI operation because the
control file contains all the document-name and document- control file contains all the document-name and document-
format values specified in the Send-Document and Send-URI format values specified in the Send-Document and Send-URI
operations. operations.
. the mapper SHALL perform one receive-data-file sub-command for . the mapper MUST perform one receive-data-file sub-command for
each Send-Document or Send-URI operation received and in the each Send-Document or Send-URI operation received and in the
same order received. same order received.
. the mapper SHALL send the control file either before all data . the mapper MUST send the control file either before all data
files or after all data files. files or after all data files.
(See the note in the section on Print-Job about the dilemma of (See the note in the section on Print-Job about the dilemma of
sending the control file either before or after the data sending the control file either before or after the data
files. files.
5.5 Send-Document 5.5 Send-Document
The mapper performs a receive-data-file sub-command on the received The mapper performs a receive-data-file sub-command on the received
data. See the preceding section 5.4 "Create-Job" for the details. data. See the preceding section 5.4 "Create-Job" for the details.
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5.6 Send-URI 5.6 Send-URI
The mapper SHALL obtain the data referenced by the "document-uri" The mapper MUST obtain the data referenced by the "document-uri"
parameter, and SHALL then treat that data as if it had been received via parameter, and MUST then treat that data as if it had been received via
a Send-Document operation. See the preceding section 5.5 "Send-Document" a Send-Document operation. See the preceding section 5.5 "Send-Document"
for the details. for the details.
5.7 Cancel-Job 5.7 Cancel-Job
The mapper SHALL perform a remove-jobs command with the following The mapper MUST perform a remove-jobs command with the following
parameters: parameters:
. the printer is the one to which the job was submitted, that is . the printer is the one to which the job was submitted, that is
the IPP printer-uri is mapped to an LPD printer-name by the the IPP printer-uri is mapped to an LPD printer-name by the
same mechanism as for all commands. , same mechanism as for all commands.
. the agent is the authenticated user-name of the IPP client, . the agent is the authenticated user-name of the IPP client,
. the job-number is the job-id returned by the Print-Job . the job-number is the job-id returned by the Print-Job
command, that is, the LPD job-number has the same value as the command, that is, the LPD job-number has the same value as the
IPP job-id for likely implementations. . IPP job-id for likely implementations.
5.8 Get-Printer-Attributes 5.8 Get-Printer-Attributes
LPD severely limits the set of attributes that the mapper is able to LPD severely limits the set of attributes that the mapper is able to
return in its response for this operation. The mapper SHALL support, at return in its response for this operation. The mapper MUST support, at
most, the following printer attributes: most, the following printer attributes:
. printer-state . printer-state
. printer-state-reasons . printer-state-reasons
The mapper uses either the long or short form of the "send queue state" The mapper uses either the long or short form of the "send queue state"
command. command.
Jacobs, Martin Expires June 19, 1998 The mapper MUST assume that the LPD response that it receives has the
The mapper SHALL assume that the LPD response that it receives has the
format and information specified in section 3.3 "Send queue state format and information specified in section 3.3 "Send queue state
(short)" and section 3.4 "Send queue state (long)". The mapper SHALL (short)" and section 3.4 "Send queue state (long)". The mapper MUST
determine the value of each requested attribute by using the inverse of determine the value of each requested attribute by using the inverse of
the mapping specified in the two aforementioned sections. the mapping specified in the two aforementioned sections.
Note: the mapper can determine the response from the printer-status line Note: the mapper can determine the response from the printer-status line
without examining the rest of the LPD response. without examining the rest of the LPD response.
5.9 Get-Job-Attributes 5.9 Get-Job-Attributes
LPD severely limits the set of attributes that the mapper is able to LPD severely limits the set of attributes that the mapper is able to
return in its response for this operation. The mapper SHALL support, at return in its response for this operation. The mapper MUST support, at
most, the following job attributes: most, the following job attributes:
. number-of-intervening-jobs . number-of-intervening-jobs
. job-originating-user-name . job-originating-user-name
. job-id . job-id
. document-name . document-name
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. job-k-octets . job-k-octets
. copies . copies
The mapper uses either the long or short form of the "send queue state" The mapper uses either the long or short form of the "send queue state"
command. If it receives a request for the "job-k-octets" or "copies" command. If it receives a request for the "job-k-octets" or "copies"
and supports the attribute it SHALL use the long form; otherwise, it and supports the attribute it MUST use the long form; otherwise, it MUST
SHALL use the short form. use the short form.
Note: the value of job-k-octets is the value in the short form divided Note: the value of job-k-octets is the value in the short form divided
by the number of "copies" which is on the long form only. Its value can by the number of "copies" which is on the long form only. Its value can
also be determined by adding the "size" field values for each document also be determined by adding the "size" field values for each document
in the job in the long form. in the job in the long form.
The mapper SHALL assume that the LPD response that it receives has the The mapper MUST assume that the LPD response that it receives has the
format and information specified in section 3.3 "Send queue state format and information specified in section 3.3 "Send queue state
(short)" and section 3.4 "Send queue state (long)". The mapper SHALL (short)" and section 3.4 "Send queue state (long)". The mapper MUST
determine the value of each requested attribute by using the inverse of determine the value of each requested attribute by using the inverse of
the mapping specified in the two aforementioned sections. the mapping specified in the two aforementioned sections.
Note: when the mapper uses the LPD short form, it can determine the Note: when the mapper uses the LPD short form, it can determine the
response from the single LPD line that pertains to the job specified by response from the single LPD line that pertains to the job specified by
the Get-Job-Attributes operation. the Get-Job-Attributes operation.
NOTE: the mapper can use its correspondence between the IPP job-id, job- NOTE: the mapper can use its correspondence between the IPP job-id, job-
uri and the LPD job-number. uri and the LPD job-number.
5.10 Get-Jobs 5.10 Get-Jobs
The mapper SHALL perform this operation in the same way as Get-Job- The mapper MUST perform this operation in the same way as Get-Job-
Attributes except that the mapper converts all the LPD job-lines, and Attributes except that the mapper converts all the LPD job-lines, and
the IPP response contains one job object for each job-line in the LPD the IPP response contains one job object for each job-line in the LPD
response.. response..
Jacobs, Martin Expires June 19, 1998
6. Mapping of IPP Parameters to LPD Control File Lines 6. Mapping of IPP Parameters to LPD Control File Lines
This section describes the mapping from IPP operation input parameters This section describes the mapping from IPP operation input parameters
to LPD control file lines (called `functions'). The mapper receives the to LPD control file lines (called `functions'). The mapper receives the
IPP operation input parameters via the IPP operation. Each of the IPP IPP operation input parameters via the IPP operation. Each of the IPP
operation input parameters appear as sub-sections of section 3 and 4.2 operation input parameters appear as sub-sections of section 3 and 4.2
in the IPP model document [ipp-mod]. in the IPP model document [ipp-mod].
In the context of LPD control file lines, the text operands have a In the context of LPD control file lines, the text operands have a
maximum length of 31 or 99 while IPP input parameters have a maximum of maximum length of 31 or 99 while IPP input parameters have a maximum of
255 characters. Therefore, there may be some data loss if the IPP 255 characters. Therefore, there may be some data loss if the IPP
parameters exceed the maximum length of the LPD equivalent operands. parameters exceed the maximum length of the LPD equivalent operands.
The mapper converts each supported IPP parameter to its corresponding The mapper converts each supported IPP parameter to its corresponding
LPD function as defined by tables in the subsections that follow. These LPD function as defined by tables in the subsections that follow. These
subsections group functions according to whether they are: subsections group functions according to whether they are:
. required with a job, . required with a job,
. optional with a job . optional with a job
Jacobs, Martin Expires December 30, 1998
. required with each document. . required with each document.
In the tables below, each IPP value is given a name, such as `h'. If an In the tables below, each IPP value is given a name, such as `h'. If an
LPD value uses the IPP value, then the LPD value column contains the IPP LPD value uses the IPP value, then the LPD value column contains the IPP
name, such as `h' to denote this. Otherwise, the LPD value column name, such as `h' to denote this. Otherwise, the LPD value column
specifies the literal value. specifies the literal value.
6.1 Required Job Functions 6.1 Required Job Functions
The mapper SHALL include the following LPD functions with each job, and The mapper MUST include the following LPD functions with each job, and
they SHALL have the specified value. They SHALL be the first functions they MUST have the specified value. They MUST be the first functions in
in the control file and they SHALL be in the order "H" and then "P". the control file and they MUST be in the order "H" and then "P".
IPP LPD function IPP LPD function
name value name value description name value name value description
(perhaps in security h H gateway host Originating Host (perhaps in security h H gateway host Originating Host
layer) layer)
requesting-user-name u P u User identification requesting-user-name u P u User identification
and in the security and in the security
layer layer
A mapper SHALL sends its own host rather than the client's host, because A mapper MUST sends its own host rather than the client's host, because
some LPD systems require that it be the same as the host from which the some LPD systems require that it be the same as the host from which the
remove-jobs command comes. A mapper MAY send its own user name as user remove-jobs command comes. A mapper MAY send its own user name as user
identification rather than the client user. But in any case, the values identification rather than the client user. But in any case, the values
sent SHALL be compatible with the LPD remove-jobs operation. sent MUST be compatible with the LPD remove-jobs operation.
6.2 Optional Job Functions 6.2 Optional Job Functions
The mapper MAY include the following LPD functions with each job. They The mapper MAY include the following LPD functions with each job. They
SHALL have the specified value if they are sent. These functions, if MUST have the specified value if they are sent. These functions, if
present, MUST follow the require job functions, and they MUST precede
Jacobs, Martin Expires June 19, 1998
present, SHALL follow the require job functions, and they SHALL precede
the required document functions. the required document functions.
IPP attribute LPD function IPP attribute LPD function
name value nam value description
e name value name value description
job-name j J j Job name for banner job-name j J j Job name for banner
page page
job-sheets `standard' L u Print banner page job-sheets `standard' L u Print banner page
job-sheets `none' omit `L' function job-sheets `none' omit `L' function
Note: `L' has special meaning when it is omitted. If `J' is omitted, Note: `L' has special meaning when it is omitted. If `J' is omitted,
some undefined behavior occurs with respect to the banner page. some undefined behavior occurs with respect to the banner page.
Jacobs, Martin Expires December 30, 1998
6.3 Required Document Functions 6.3 Required Document Functions
The mapper SHALL include one set of the following LPD functions with The mapper MUST include one set of the following LPD functions with
each document, and they SHALL have the specified values. For each each document, and they MUST have the specified values. For each
document, the order of the functions SHALL be `f', `U' and then `N', document, the order of the functions MUST be `f', `U' and then `N',
where `f' is replicated once for each copy. where `f' is replicated once for each copy.
IPP attribute LPD function IPP attribute LPD function
name value name value description name value name value description
document- 'application/octet- f fff Print formatted file document- 'application/octet- f fff Print formatted file
format stream' or format stream' or
'application/PostScrip 'application/PostScript'
t'
copies c replicate `f' `c' copies c replicate `f' `c'
times times
none U fff Unlink data file none U fff Unlink data file
document- n N n Name of source file document- n N n Name of source file
name name
Note: the value `fff' of the `f' and `U' functions is the name of the Note: the value `fff' of the `f' and `U' functions is the name of the
data file as transferred, e.g. "dfA123woden". data file as transferred, e.g. "dfA123woden".
Note: the mapper SHALL not send the `o' function Note: the mapper MUST NOT send the `o' function
ISSUE: should we register DVI, troff or ditroff? ISSUE: should we register DVI, troff or ditroff?
If the mapper receives no "ipp-attribute-fidelitybest-effort" or it has If the mapper receives no "ipp-attribute-fidelitybest-effort" or it has
a value of false, then the mapper SHALL reject the job if it specifies a value of false, then the mapper MUST reject the job if it specifies
attributes or attribute values that are not among those supported in the attributes or attribute values that are not among those supported in the
above tables. above tables.
Below is an example of the minimal control file for a job with three Below is an example of the minimal control file for a job with three
copies of two files `foo' and `bar': copies of two files `foo' and `bar':
H tiger H tiger
P jones P jones
f dfA123woden f dfA123woden
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f dfA123woden f dfA123woden
f dfA123woden f dfA123woden
U dfA123woden U dfA123woden
N foo N foo
f dfB123woden f dfB123woden
f dfB123woden f dfB123woden
f dfB123woden f dfB123woden
U dfB123woden U dfB123woden
N bar N bar
7. Security Jacobs, Martin Expires December 30, 1998
There are no security issues beyond those covered in the IPP protocol 7. Security Considerations
document [ipp-pro], the IPP model document [ipp-mod] and the LPD
document [rfc1179]. There are no security issues beyond those covered in the IPP Encoding
and Transport document [ipp-pro], the IPP model document [ipp-mod] and
the LPD document [rfc1179].
8. References 8. References
[ipp-mod] R. deBry, T. Hastings, R. Herriot, S. Isaacson, P. Powell, [ipp-lpd] Herriot, R., Hastings, T., Jacobs, N., Martin, J., "Mapping
"Internet Printing Protocol/1.0: Model and Semantics", <draft- between LPD and IPP Protocols", draft-ietf-ipp-lpd-ipp-map-
ietf-ipp-model-07.txt>, November 1997. 04.txt, June 1998.
[ipp-pro] R. Herriot, S. Butler, P. Moore, R. Turner, "Internet [ipp-mod] Isaacson, S., deBry, R., Hastings, T., Herriot, R., Powell,
Printing Protocol/1.0: Protocol specification", <draft-ietf-ipp- P., "Internet Printing Protocol/1.0: Model and Semantics" draft-
protocol-03.txt>, November 1997. ietf-ipp-mod-10.txt, June, 1998.
[ipp-pro] Herriot, R., Butler, S., Moore, P., Tuner, R., "Internet
Printing Protocol/1.0: Encoding and Transport", draft-ietf-ipp-
pro-06.txt, June, 1998.
[ipp-rat] Zilles, S., "Rationale for the Structure and Model and
Protocol for the Internet Printing Protocol", draft-ietf-ipp-
rat-03.txt, June, 1998.
[ipp-req] Wright, D., "Design Goals for an Internet Printing
Protocol", draft-ietf-ipp-req-02.txt, June, 1998.
[rfc1179] L. McLaughlin, "Line Printer Daemon Protocol", RFC 1179, [rfc1179] L. McLaughlin, "Line Printer Daemon Protocol", RFC 1179,
August 1990. August 1990.
[rfc1759] Smith, R., Wright, F., Hastings, T., Zilles, S., and [rfc1759] Smith, R., Wright, F., Hastings, T., Zilles, S., and
Gyllenskog, J., "Printer MIB", RFC 1759, March 1995. Gyllenskog, J., "Printer MIB", RFC 1759, March 1995.
[rfc2119] S. Bradner, "Key words for use in RFCs to Indicate [rfc2119] S. Bradner, "Key words for use in RFCs to Indicate
Requirement Levels", RFC 2119 , March 1997 Requirement Levels", RFC 2119 , March 1997
skipping to change at page 20, line 56 skipping to change at page 22, line 4
Sun Microsystems Inc. Sun Microsystems Inc. Sun Microsystems Inc. Sun Microsystems Inc.
901 San Antonio.Road., MPK-17 1430 Owl Ridge Rd. 901 San Antonio.Road., MPK-17 1430 Owl Ridge Rd.
Mountain View, CA 94043 Colorado Springs, CO 80919 Mountain View, CA 94043 Colorado Springs, CO 80919
Phone: 650-786-8995 Phone: 719-532-9927 Phone: 650-786-8995 Phone: 719-532-9927
Fax: 650-786-7077 Fax: 719-535-0956 Fax: 650-786-7077 Fax: 719-535-0956
Email: robert.herriot@eng.sun.com Email: Email: robert.herriot@eng.sun.com Email:
Norm.Jacobs@Central.sun.com Norm.Jacobs@Central.sun.com
Thomas N. Hastings Jay Martin Thomas N. Hastings Jay Martin
Xerox Corporation Underscore, Inc. Jacobs, Martin Expires December 30, 1998
Jacobs, Martin Expires June 19, 1998
Xerox Corporation Underscore, Inc.
701 S. Aviation Blvd., ESAE-231 41-C Sagamore Park Road 701 S. Aviation Blvd., ESAE-231 41-C Sagamore Park Road
El Segundo, CA 90245 Hudson, NH 03051-4915 El Segundo, CA 90245 Hudson, NH 03051-4915
Phone: 310-333-6413 Phone: 603-889-7000 Phone: 310-333-6413 Phone: 603-889-7000
Fax: 310-333-5514 Fax: 603-889-2699 Fax: 310-333-5514 Fax: 603-889-2699
EMail: hastings@cp10.es.xerox.com Email: jkm@underscore.com EMail: hastings@cp10.es.xerox.com Email: jkm@underscore.com
10. Appendix A: ABNF Syntax for response of Send-queue-state (short) 10. Appendix A: ABNF Syntax for response of Send-queue-state (short)
The syntax in ABNF for the response to the LPD command `send-queue-state The syntax in ABNF for the response to the LPD command `send-queue-state
(long)' is: (long)' is:
status-response = empty-queue / nonempty-queue status-response = empty-queue / nonempty-queue
empty-queue = "no-entries" LF empty-queue = "no-entries" LF
nonempty-queue = printer-status LF heading LF *(job LF) nonempty-queue = printer-status LF heading LF *(job LF)
printer-status = OK-status / error-status printer-status = OK-status / error-status
OK-status = printer-name SP "ready and printing" LF OK-status = printer-name SP "ready and printing" LF
error-status = < implementation dependent status information > error-status = < implementation dependent status information >
heading = "Rank" 3SP Owner " " 6SP "Job" 13SP "Files" heading = "Rank" 3SP "Owner" 6SP "Job" 13SP "Files"
23SP "Total Size" LF 23SP "Total Size" LF
; the column headings and their values below begin ; the column headings and their values below begin
at the columns at the columns
; 1, 8, 19, 35 and 63 ; 1, 8, 19, 35 and 63
job = rank *SP owner *SP job *SP files *SP total-size "bytes" job = rank *SP owner *SP job *SP files *SP total-size "bytes"
; jobs are in order of oldest to newest ; jobs are in order of oldest to newest
rank = "active" / "1st" / "2nd" / "3rd" / integer "th" rank = "active" / "1st" / "2nd" / "3rd" / integer "th"
; job that is printing is "active" ; job that is printing is "active"
; other values show position in the queue ; other values show position in the queue
owner = <user name of person who submitted the job> owner = <user name of person who submitted the job>
skipping to change at page 21, line 58 skipping to change at page 23, line 4
OK-status = printer-name SP "ready and printing" LF OK-status = printer-name SP "ready and printing" LF
error-status = < implementation dependent status information > error-status = < implementation dependent status information >
job = LF line-1 LF line-2 LF job = LF line-1 LF line-2 LF
line-1 = owner ":" SP rank 1*SP "[job" job SP host "]" line-1 = owner ":" SP rank 1*SP "[job" job SP host "]"
line-2 = file-name 1*SP document-size "bytes" line-2 = file-name 1*SP document-size "bytes"
; jobs are in order of oldest to newest ; jobs are in order of oldest to newest
rank = "active" / "1st" / "2nd" / "3rd" / integer "th" rank = "active" / "1st" / "2nd" / "3rd" / integer "th"
; job that is printing is "active" ; job that is printing is "active"
; other values show position in the queue ; other values show position in the queue
owner = <user name of person who submitted the job> owner = <user name of person who submitted the job>
Jacobs, Martin Expires December 30, 1998
job = 1*3DIGIT job = 1*3DIGIT
Jacobs, Martin Expires June 19, 1998
file-name = [ 1*DIGIT "copies of" SP ] <file name> file-name = [ 1*DIGIT "copies of" SP ] <file name>
; truncated to 24 characters ; truncated to 24 characters
document-size = 1*DIGIT ;size of single copy of the document. document-size = 1*DIGIT ;size of single copy of the document.
12. Appendix C: Unsupported LPD functions 12. Appendix C: Unsupported LPD functions
The follow LPD functions have no IPP equivalent. The LPD-to-IPP mapper The follow LPD functions have no IPP equivalent. The LPD-to-IPP mapper
ignores them and the IPP-to-LPD mapper does not send them. ignores them and the IPP-to-LPD mapper does not send them.
LPD command LPD command
skipping to change at page 22, line 15 skipping to change at page 23, line 16
file-name = [ 1*DIGIT "copies of" SP ] <file name> file-name = [ 1*DIGIT "copies of" SP ] <file name>
; truncated to 24 characters ; truncated to 24 characters
document-size = 1*DIGIT ;size of single copy of the document. document-size = 1*DIGIT ;size of single copy of the document.
12. Appendix C: Unsupported LPD functions 12. Appendix C: Unsupported LPD functions
The follow LPD functions have no IPP equivalent. The LPD-to-IPP mapper The follow LPD functions have no IPP equivalent. The LPD-to-IPP mapper
ignores them and the IPP-to-LPD mapper does not send them. ignores them and the IPP-to-LPD mapper does not send them.
LPD command LPD command
name description name description
C Class for banner page C Class for banner page
I Indent Printing I Indent Printing
H Host of client H Host of client
M Mail when printed M Mail when printed
S Symbolic link data S Symbolic link data
T Title for pr T Title for pr
W Width of output W Width of output
1 troff R font 1 troff R font
2 troff I font 2 troff I font
3 troff B font 3 troff B font
4 troff S font 4 troff S font
The follow LPD functions specify document-formats which have no IPP The follow LPD functions specify document-formats which have no IPP
equivalent, unless someone registers them. The LPD-to-IPP mapper rejects equivalent, unless someone registers them. The LPD-to-IPP mapper rejects
jobs that request such a document format, and the IPP-to-LPD mapper does jobs that request such a document format, and the IPP-to-LPD mapper does
not send them. not send them.
LPD command LPD command
name description name description
c Plot CIF file c Plot CIF file
d Print DVI file d Print DVI file
g Plot file g Plot file
k reserved for Kerberized clients and servers k reserved for Kerberized clients and servers
Jacobs, Martin Expires December 30, 1998
LPD command
name description
n Print ditroff output file n Print ditroff output file
p Print file with 'pr' format p Print file with 'pr' format
r File to print with FORTRAN carriage control r File to print with FORTRAN carriage control
t Print troff output file t Print troff output file
v Print raster file v Print raster file
z reserved for future use with the Palladium z reserved for future use with the Palladium
print system print system
13. Appendix D: Full Copyright Statement 13. Appendix D: Full Copyright Statement
Copyright (C)The Internet Society (1997). All Rights Reserved Copyright (C)The Internet Society (1997). All Rights Reserved
This document and translations of it may be copied and furnished to This document and translations of it may be copied and furnished to
others, and derivative works that comment on or otherwise explain it or others, and derivative works that comment on or otherwise explain it or
assist in its implementation may be prepared, copied, published and assist in its implementation may be prepared, copied, published and
skipping to change at page 23, line 4 skipping to change at page 24, line 32
13. Appendix D: Full Copyright Statement 13. Appendix D: Full Copyright Statement
Copyright (C)The Internet Society (1997). All Rights Reserved Copyright (C)The Internet Society (1997). All Rights Reserved
This document and translations of it may be copied and furnished to This document and translations of it may be copied and furnished to
others, and derivative works that comment on or otherwise explain it or others, and derivative works that comment on or otherwise explain it or
assist in its implementation may be prepared, copied, published and assist in its implementation may be prepared, copied, published and
distributed, in whole or in part, without restriction of any kind, distributed, in whole or in part, without restriction of any kind,
provided that the above copyright notice and this paragraph are included provided that the above copyright notice and this paragraph are included
Jacobs, Martin Expires June 19, 1998
on all such copies and derivative works. However, this document itself 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 may not be modified in any way, such as by removing the copyright notice
or references to the Internet Society or other Internet organizations, or references to the Internet Society or other Internet organizations,
except as needed for the purpose of developing Internet standards in except as needed for the purpose of developing Internet standards in
which case the procedures for copyrights defined in the Internet which case the procedures for copyrights defined in the Internet
Standards process must be followed, or as required to translate it into Standards process must be followed, or as required to translate it into
languages other than English. languages other than English.
The limited permissions granted above are perpetual and will not be The limited permissions granted above are perpetual and will not be
revoked by the Internet Society or its successors or assigns. revoked by the Internet Society or its successors or assigns.
This document and the information contained herein is provided on an "AS This document and the information contained herein is provided on an "AS
IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK
FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT
LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT
INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE. FITNESS FOR A PARTICULAR PURPOSE.
Jacobs, Martin Expires June 19, 1998 Jacobs, Martin Expires December 30, 1998
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