host                           unspecified conversion; job-
                                     originating-host may be the
                                     mapper's host
      copies    copies               the mapper shall assume the
                                     value of copies precedes the
                                     string "copies of "; otherwise,
                                     the value of copies is 1.

   NOTE: This specification does not define how the mapper maps the LPD
   Printer-name operand to the IPP printer-uri operation attribute.








 
RFC 2569         Mapping between LPD and IPP Protocols        April 1999


3.5 Remove jobs

   Command syntax:

      remove-jobs = %x05 printer-name SP agent
                          *(SP(user-name / job-number)) LF

   The agent operand is the user-name of the user initiating the
   remove-jobs command. The special user-name 'root' indicates a
   privileged user who can remove jobs whose user-name differs from the
   agent.

   The mapper SHALL issue one Cancel-Job operation for each job
   referenced 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 implicitly references all jobs owned by the
   specified user. The active job is implicitly referenced when the
   remove-jobs command contains neither job-numbers nor user-names. The
   mapper MAY use Get-Jobs to determine the job-uri of implicitly
   referenced jobs.

   The mapper SHALL not use the agent name of 'root' when end-users
   cancel their own jobs.  Violation of this rule creates a potential
   security violation, and it may cause the printer to issue a
   notification that 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
   user name specified with the 'P' function in the control file for job
   J, then the mapper SHALL ensure that the initiator of the Cancel-Job
   command 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 receiver perceives as the initiator of IPP operations. The mapper
   either acts as itself or acts on behalf of another user. The latter
   is 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 it is also desirable for other operations. For example,
   Get-Jobs may give more information about job submitted by the
   initiator of this operation.

   NOTE: This specification does not define how the mapper maps: (1) the
   LPD printer-name to the IPP "printer-uri" or (2) the LPD job-number
   to the IPP "job-uri".

   NOTE: This specification does not specify how the mapper maps the LPD
   user-name to the IPP job-originating-user because the mapper may use
   its own user-name with jobs.




 
RFC 2569         Mapping between LPD and IPP Protocols        April 1999


4. Mapping of LPD Control File Lines to IPP Operation and Job Template
   Attributes

   This section describes the mapping from LPD control file lines
   (called 'functions') to IPP operation attributes and job template
   attributes.  The mapper receives the 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.

   In LPD control file lines, the text operands have a maximum length of
   31 or 99 while IPP operation attribute and job template attribute
   values have a maximum of 255 or 1023 octets, depending on the
   attribute syntax.  Therefore, no data is lost.

   The mapper converts each supported LPD function to its corresponding
   IPP operation or job template attribute as defined by tables in the
   subsections that follow. These subsections group functions according
   to whether they are:

      - required with a job,
      - optional with a job
      - required with each document.