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 name, such as 'h' to denote this.  Otherwise, the IPP value
   column specifies the literal value.

4.1 Required Job Functions

   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 information as a operation or job template attribute with each
   IPP job.  The functions SHOULD be in 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 order:

   LPD function                     IPP
   name value   description         name          value

   H    h       Originating Host                  h (in security layer)
   P    u       User identification requesting-   u (and in security
                                    user-name     layer)
                none                ipp-          'true'
                                    attribute-
                                    fidelity






 
RFC 2569         Mapping between LPD and IPP Protocols        April 1999


   A mapper MAY send its own host rather than the client's host, and a
   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 the Cancel-Job operation. The IPP operation MAY have no way to
   specify an originating host-name.

   The mapper SHALL include ipp-attribute-fidelity = true so that it
   doesn't have to determine which attributes a printer supports.

4.2 Optional Job Functions

   The following LPD functions MAY be present in a received job. These
   functions SHOULD follow the required job functions and precede the
   document functions, but they MAY be anywhere in the control file.

   If the mapper receives such an LPD function, the mapper SHALL include
   the corresponding IPP attribute with the value converted as specified
   in the table below.  If the mapper does not receive such an LPD
   attribute, the mapper SHALL 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
   name value  description       name         value

   J    j      Job name for      job-name     j
               banner page
   L    l      Print banner page job-sheets   'standard' if 'L' is
                                              present
                                              'none' if 'L' is present
   M    m      Mail When Printed              IPP has no notification
                                              mechanism. To support
                                              this LPD feature, the
                                              gateway must poll using
                                              the Get-Job-Attributes
                                              operation.

4.3 Required Document Functions

   The mapper SHALL receive one set of the required document functions
   with each copy of a document, and SHALL include the converted
   information as operation or job template attributes with each IPP
   document.

   If the control file contains required and recommended document
   functions, the required functions SHOULD precede the recommended ones
   and if the job contains multiple documents, all the functions for





 
RFC 2569         Mapping between LPD and IPP Protocols        April 1999


   each document are grouped together as shown in the example of section
   6.3 "Required Document Functions". However, the document functions
   MAY be in any order.

   LPD function                   IPP
   name value description         name             value

   f     fff  Print formatted     document-format  'application/octet-
              file                                 stream'
   l     fff  Print file leaving  document-format  'application/octet-