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ns-2.33 with mobiwan error

Posted 04-22-2012 at 03:18 AM by Riaz Khan

i tried to patch mobiwan with ns-2.33 and after that when i run any tcl script it gives me an error:

[riaz@riaz new_project]$ can't read "EnableHierRt_": no such variable
> (Object set line 1)
> invoked from within
> "Simulator set EnableHierRt_"
> (procedure "_o10" line 10)
> (Node attach line 10)
> invoked from within
> "$node attach $agent"
>...

Riaz Khan

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xfce4 version 4.10 preview before final release.

Posted 04-21-2012 at 09:09 PM by stretchedthin

I built xfce4 version 4.10pre2 from the source provided on the site and thought I'd do my bit to help the upcoming release and give give it some much deserved promotion . Disclaimer, Xfce4 is my desktop environment of choice, as most of you know. I don't like giving up performance for the sake of bells and whistles but thanks to Xfce4 I can have both.

xfce4 version 4.10 preview before final release.

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Why is netfilter in kernel space?

Posted 04-21-2012 at 03:11 PM by Skaperen

Isn't one of the kernel design intentions to move more things to user space and keep the kernel itself smaller? I think network filtering should be one of those things.

So why haven't they done that? Is it considered too much of a performance issue to use user processes filter packets? I don't think it would be. But maybe there is some functionality missing that can be done in the kernel and not in user space?

The API would not be hard. Just create device nodes...

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NAM of ns2.23 not working

Posted 04-20-2012 at 09:43 AM by afsha2719

hi ... i installed ns-2.33 successfully but the problem is that NAM is not working. when i run a tcl script it gives an error :

"stop"
[root@localhost programs]# ns 5nodes.tcl
ns: finish: couldn't execute "nam": permission denied
while executing
"exec nam out.nam &"
(procedure "finish" line 6)
invoked from within
"finish"

my OS is fedora 16
...

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GUI coding. A peek at run-time inheritance (method lookups)

Posted 04-20-2012 at 08:23 AM by rainbowsally
Updated 04-20-2012 at 08:26 AM by rainbowsally

Tags compiling, computer mad science

GUI coding. A peek at run-time inheritance (method lookups)

In previous blog entries we built QT's example/desktop/screenshot application and did a bit of tracing with a debugger.

Let's take a look at the metaobject definition file (moc_screenshot.cpp) next.

This is where QT implements a class' method inheritance. It looks up 'methods' from the widget's parent first, then if parent doesn't handle the '_id' we try it here, and if we don't handle it...

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