4.1 GETWINDOWSCREDSFROMUNIXUSERNAME_PROC

The client sends a SUNRPC packet to the User Name Mapping Protocol service requesting the Windows account mapping for POSIX user "root". The client asks for a match on the POSIX username alone in the SearchOption of the procedure.

   Frame: 
 + Ethernet: Etype = Internet IP (IPv4)
 + Ipv4: Next Protocol = UDP, Packet ID = 33455, Total IP Length = 88
 + Udp: SrcPort = 965, DstPort = UNM(819), Length = 68
 - Rpc: Call, Program = mapsvc, Procedure =
   GETWINDOWSCREDSFROMUNIXUSERNAME_PROC
     TransactionID: 1221413202 (0x48CD4952)
     MessageType: Call
   - ServiceCall: 
       RPCVersionNumber: 2 (0x2)
       ProgramNumber: mapsvc, 351455(0x00055CDF)
       ProgramVersion: 2 (0x2)
       ProcedureNumber: GETWINDOWSCREDSFROMUNIXUSERNAME_PROC
     - Credential: No Identity Authentication
         Flavor: No Identity Authentication
         AuthDataLength: 0 (0x0)
     - Verification: 
         Flavor: No Identity Authentication
         AuthDataLength: 0 (0x0)
 - Unm: GETWINDOWSCREDSFROMUNIXUSERNAME_PROC Call
   - UnixUser: 
       SearchOption: UnixAccountName is valid (0x1)
       Reserved: Send as 0x00000000
       ID: 0
     - UnixAccountName: 0x1
       - UNMName: root
           Length: 4
           Data: root

The User Name Mapping Protocol service on the server responds with a SUNRPC response packet with the advanced map for POSIX user "root" to Windows user "nfs-dom-1\administrator", illustrated as follows.

   Frame: 
 + Ethernet: Etype = Internet IP (IPv4)
 + Ipv4: Next Protocol = UDP, Packet ID = 62340, Total IP Length = 88
 + Udp: SrcPort = UNM(819), DstPort = 965, Length = 68
 - Rpc: Reply, Status = Message accepted, Detail = Call succeeded
     TransactionID: 1221413202 (0x48CD4952)
     MessageType: Reply
   - ServiceReply: 
       ReplyStatus: Message accepted
     - MessageAccepted: 
       - Verification: 
           Flavor: No Identity Authentication
           AuthDataLength: 0 (0x0)
         AcceptState: Call succeeded
 - Unm: GETWINDOWSCREDSFROMUNIXUSERNAME_PROC Reply
   - WindowsCreds: 
       Status: 0
       Reserved: Send as 0x00000000
     - WindowsAccountName: 0x1
       - UNMWindowsName: nfs-dom-1\administrator
           Length: 23
           Data: nfs-dom-1\administrator
           Padding: Binary Large Object (1 Bytes)