[Click] generate random interval source packets

[Eddie Kohler]

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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