IP TOS problem in WindowsXP

[Yung Leem <yung.leem --at-- samsung.com>]

Wrestling with myself for a while, I finally decided to ask the iperf
community to help me out here.

What I am trying to do is pretty simple, but there seems to be some kind of
bug/misconfiguration
that prevents me from what I want to do.

What am I trying to do is trying to use -S "--tos" option on UDP client on
WindowsXP

My system is WindowsXP SP2, and I've tried 2 ways so far.

1. Compile and test with iperf2.02 source using cygwin1.5.17

command> iperf -c 165.213.85.1 -u -S 111
output> write2 failed: Transport endpoint is not connected

2. Use the Win32 binary of iperf1.70 from the nlanr.net webpage, and it
gives me a slightly different result
    yet still fails.

output> Sending 1470 byte datagrams
            getpeername failed: Socket is not connected

I did configure WindowsXP to allow QoS by fixing some registry tables with
regedit.exe.

I don't think this is an iperf bug because it worked fine on Linux, but I
believe there is
some kind of mismatch in environment in Windows?

Please help.  Thank you for your time reading my question.