[Click] generate random interval source packets

[Jimmy]

Thanks Ian and Eddie, I have already solved the problem and now I am
able to create a source element which can send packets based on
exponential random time interval.

J.

On Wed, Mar 24, 2010 at 12:36 PM, Eddie Kohler <kohler at cs.ucla.edu> wrote:
> Hey,
>
> I agree with everything that Ian said, with one exception.  If you are
> compiling code for the user-level driver, <math.h> should work just fine
> with no extra FLAGS settings.  But if you are compiling code destined for
> the kernel, <math.h> WILL NEVER WORK.  Functions from <math.h> are simply
> not available in the kernel.
>
> Eddie
>
>
> Ian Rose wrote:
>>
>> click_random is defined in glue.hh (which is where most of the click_xxx
>> utility-type methods are found).
>>
>> As far as your app requirements go, I don't see any existing elements that
>> do exactly what you want, but you could maybe create the general behavior
>> with a combination of TimedSource and RandomSample?  It would be a little
>> inefficient (since many of the packets that TimedSource creates would just
>> be immediately destroyed by RandomSample) but as long as your data rates are
>> not too high this probably wouldn't be a big problem.
>>
>> Is click cannot find math.h then that header file is not in the default
>> search path for include files.  When you run configure to initially set up
>> click you can tell it about additional directories to search in.  For
>> example, when I configure click I include the following argument:
>>>
>>> CXXFLAGS="-I/usr/local/include -I$(HOME)/include"
>>
>> This ensures that each time I compile click it also looks for header files
>> in /usr/local/include/ and $(HOME)/include/.
>>
>> - Ian
>>
>>
>> Jimmy wrote:
>>>
>>> Hi all,
>>>
>>> I have checked randomsource element, which can generate random length
>>> packets. So what is the interval if using this element. In this code,
>>> click_random() is used to generate a random number, which document
>>> includes this function?
>>>
>>> I am considering generate packets whose time interval is random. I
>>> checked timedsource element's original codes, it seems very hard to
>>> change since the _interval is specified by INTERVAL.
>>>
>>> Can anybody give me some clue on how to implement random interval source?
>>>
>>> Also, I include math.h in the element codes. It has some problems when
>>> compiling, so how to fix this?
>>>
>>> Thanks.
>>>
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>



-- 
Best Regards,

Jimmy