8.11. Push-Profile-Request (PPR) Command

   The Push-Profile-Request (PPR) command is indicated by the
   Command-Code set to 288 and the Command Flags' 'R' bit set.  The
   Diameter server sends this command to the Diameter client in a SIP
   server to update either the user profile of an already registered
   user in that SIP server or the SIP accounting information.  This
   allows an operator to modify the data of a user profile or the
   accounting information and push it to the SIP server where the user
   is registered.

   Each user has a user profile associated with him/her and other
   accounting information.  The profile or the accounting information
   may change with time, e.g., due to addition of new services to the
   user.  When the user profile or the accounting information changes,
   the Diameter server sends a Diameter Push-Profile-Request (PPR)
   command to the Diameter client in a SIP server, in order to start
   applying those new services.

   A PPR command MAY contain a SIP-Accounting-Information AVP that
   updates the addresses of the accounting servers.  Changes in the
   addresses of the accounting servers take effect immediately.  The
   Diameter client SHOULD close any existing accounting session with the
   existing server and start providing accounting information to the
   newly acquired accounting server.

   A PPR command MAY contain zero or more SIP-User-Data AVP values
   containing the new user profile.  On selecting the type of user data,
   the Diameter server SHOULD take into account the supported formats at
   the SIP server (SIP-Supported-User-Data-Type AVP sent in a previous
   SAR message) and the local policy.

   The User-Name AVP indicates the user to whom the profile is
   applicable.

   The Message Format of the PPR command is as follows:

       <PPR> ::= < Diameter Header: 288, REQ, PXY >
                 < Session-Id >
                 { Auth-Application-Id }
                 { Auth-Session-State }
                 { Origin-Host }
                 { Origin-Realm }
                 { Destination-Realm }
                 { User-Name }
               * [ SIP-User-Data ]
                 [ SIP-Accounting-Information ]
                 [ Destination-Host ]
                 [ Authorization-Lifetime ]
                 [ Auth-Grace-Period ]
               * [ Proxy-Info ]
               * [ Route-Record ]
               * [ AVP ]

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