[jcifs] jcifs.smb.SmbException: A duplicate name exists on the network

[Josh]

If I add an IP-hostname mapping to my HOSTS file:

  10.0.10.98      client

and try to connect to an SmbNamedPipe using the URL:

  smb://client/IPC$/foobar

I get the following exception:

  Caused by: jcifs.smb.SmbException: A duplicate name exists on the network. 
  at jcifs.smb.SmbTransport.checkStatus(SmbTransport.java:522) 
  at jcifs.smb.SmbTransport.send(SmbTransport.java:636) 
  at jcifs.smb.SmbSession.sessionSetup(SmbSession.java:280) 
  at jcifs.smb.SmbSession.send(SmbSession.java:233) 
  at jcifs.smb.SmbTree.treeConnect(SmbTree.java:154) 
  at jcifs.smb.SmbFile.doConnect(SmbFile.java:816) 
  at jcifs.smb.SmbFile.connect(SmbFile.java:854) 
  at jcifs.smb.SmbFile.connect0(SmbFile.java:793) 
  at jcifs.smb.SmbNamedPipe.connect0(SmbNamedPipe.java:203) 
  at jcifs.smb.SmbFileInputStream.<init>(SmbFileInputStream.java:73) 
  at jcifs.smb.SmbNamedPipe.getNamedPipeInputStream(SmbNamedPipe.java:166) 

Interestingly, I can reproduce the error:

  C:\>net use p: \\client\C$
  System error 52 has occurred.

  You were not connected because a duplicate name exists on the network. 
  Go to System in Control Panel to change the computer name and try again.

So jcifs is doing the right thing. But what does this error mean? Why 
can't SMB handle hosts with multiple hostnames? 

To work around this problem, I can always specify the SMB URL using an 
IP address:

  smb://10.0.10.98/IPC$/foobar

This works, however, jcifs always performs a NodeStatusRequest to resolve 
the IP address back to a NetBIOS name, and uses that as the tconHostName:

  SmbTransport.java:

  321:        tconHostName = address.getHostName();

However, "net use p: \\10.0.10.98\C$" doesn't do a NodeStatusRequest. 
The Ethereal trace shows it uses the IP address as the tree connect 
hostname:

                                       ff 53 4d 42 75 00   .f)&.... .R.SMBu.
  0040  00 00 00 18 07 c8 00 00  00 00 00 00 00 00 00 00   ........ ........
  0050  00 00 00 00 ff fe 01 08  60 00 04 ff 00 52 00 08   ........ `....R..
  0060  00 01 00 27 00 00 5c 00  5c 00 31 00 30 00 2e 00   ...'..\. \.1.0...
  0070  30 00 2e 00 31 00 30 00  2e 00 39 00 38 00 5c 00   0...1.0. ..9.8.\.
  0080  43 00 24 00 00 00 3f 3f  3f 3f 3f 00 

Is jcifs performing a NodeStatusRequest intentionally, or is it just a
side-effect of calling getHostName() on a UniAddress constructed from 
an IP address?

Thanks!
Josh