[jcifs] SmbFileOutputStream with append=true misbehaving on a certain NAS

[Daniel Tripp]

The NAS says "Vantec" on it.  Unfortunately it's not under my control to
update the OS or firmware.

I have attached two WireShark captures corresponding to two versions of my
program: one which uses JCIFS and exhibits the problem in my previous
e-mail, and one which uses normal java IO and runs correctly, but depends on
being logged into the share already via Windows Explorer.  I am new to
WireShark so forgive me if I don't know what I'm doing.

As you can see in the code below, I tried creating a separate SmbFile
instance, but the behaviour was unchanged.

Whether or not you get a chance to look at these captures, thank you very
much for your response.


JCIFS:
---
import java.io.*;
import jcifs.smb.*;

public class Foo {
  static public void main(String args_[]) throws Exception {
    String url = "smb://STORAGE-MDI/Dan/foo.txt";
    NtlmPasswordAuthentication creds
      = new NtlmPasswordAuthentication("ntdom", "STORAGE-MDI\\Guest", dan");

    OutputStream outStream1 
	= new SmbFileOutputStream(new SmbFile(url, creds));
    outStream1.write((byte)'a');
    outStream1.close();

    OutputStream outStream2 
	= new SmbFileOutputStream(new SmbFile(url, creds), true);
    outStream2.write((byte)'b');
    outStream2.close();
  }
}
---

Normal Java IO: 
---
import java.io.*;
import jcifs.smb.*;

public class Foo {
  static public void main(String args_[]) throws Exception {
    String file = "\\\\STORAGE-MDI\\Dan\\foo.txt";

    OutputStream outStream1 = new FileOutputStream(file);
    outStream1.write((byte)'a');
    outStream1.close();

    OutputStream outStream2 = new FileOutputStream(file, true);
    outStream2.write((byte)'b');
    outStream2.close();
  }
}
---


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