Setting socket options server-side: when?

Question

Hi!
I'm trying to implement a iperf ( http://dast.nlanr.net/Projects/Iperf/ ) -like bandwidth measurement tool in java, and I need to be able to set different socket options (window size, TOS byte etc.)
My question would be, when should I be setting these options on the server-side? Should I set them for the ServerSocket (whatever's applicable there- not much), or should I try setting them on the socket returned by accept() ?

Answer 1

Yes, but my point is that you can't set TOS in 1.4
regardless of where is should be set, so the point is
moot. And although you can do that in 1.5 that might
not meet your goals (and given that 1.5 is in beta and
that the feature is new, it might not work at all.)
And 1.5 might not do the other stuff that you want
either.That's strange, as I thought this one should do just that:
http://java.sun.com/j2se/1.4.2/docs/api/java/net/Socket.html#setTrafficClass(int)
Even stranger, as I was actually able to set the TOS byte on outgouing packets, using 1.4.2 (Although I'm aware, that it does depend on the underlying implementation, so it's not certain, that it will be respected)
Right now I'm trying to figure out, why it's not working on my Gentoo Linux system - tryed it with three different JREs, but still nothing.
I was able to set the TOS byte of outgouing packets on a RedHat7.3, and on several Win2k, and WinXP hosts (after working a bit on their registry ... ).