Re: iperf multicast problem on Win32

[Kevin Gibbs <kgibbs --at-- ncsa.uiuc.edu>]

Hey Ryan,
 Have you actually tried using the multicast address on Win32? It does 
work, but getsockname() returns the local address not the multicast 
address. There is already a huge amount of workarounds in the code to work 
in Win32 and changing this behavior is not a big priority to add more. I 
have used multicast several times with Win32 and had no problems.

Good luck,
Kevin

> >Date: Thu, 25 Mar 2004 14:31:21 -0800
> >To: dast --at-- nlanr.net
> >From: Ryan Barrans <rbarrans --at-- real.com>
> >Subject: iperf multicast problem on Win32
> >
> >I'm finding iperf 1.7.0 unable to bind to multicast addresses on Win32 (NT 
> >or Win2K).  If I use the "-B" option with a multicast address, it still 
> >binds to the local address.  It is working fine on Linux, and I did not see 
> >anything about this in the KNOWN_PROBLEMS file.
> >
> >Example from Win32:
> >C:\Temp\iperf>iperf -s -u -B 239.0.0.1
> >------------------------------------------------------------
> >Server listening on UDP port 5001
> >Binding to local address 172.23.100.254
> >Receiving 1470 byte datagrams
> >UDP buffer size: 8.0 KByte (default)
> >------------------------------------------------------------
> >
> >I would expect it to bind to the multicast address and join the multicast 
> >group like it does on Linux.  Please advise if there is a fix or 
> >workaround.  Thank you.