[Ns-developers] 802.11 bug fix when not using RTS/CTS

[Michele Weigle]

Hi all,

I found a bug fix for a "Scheduler: Event UID not valid" problem when  
running a simple 802.11 simulation.  Both the problem and the fix are  
well-detailed at
http://www.dei.unipd.it/wdyn/?IDsezione=2435

I've just started looking at wireless in ns-2, so I can't say if the  
fix breaks things that aren't obvious to me, but it fixed the problem  
that I was having.  I ran validate, and the following tests failed:
./test-all-diffusion3 ./test-all-wireless-shadowing ./test-all- 
wireless-lan-aodv ./test-all-wireless-gridkeeper ./test-all-wireless- 
diffusion ./test-all-wireless-lan-newnode ./test-all-WLtutorial ./ 
test-all-energy ./test-all-tagged-trace

A quick glance at some of the test-output showed that the differences  
were mainly timing differences (probably due to the fix changing the  
waiting time).

I've attached a context diff (mac-diff.txt) between ns-2.29 and the  
fixed version (small changes to mac/mac-802_11.cc, mac/mac-timers.h,  
and mac/mac-timers.cc).  (The files on the website mentioned above  
are for ns-2.27.)  Would someone more familiar with the 802.11 code  
take a look to see if everything looks good?

Thanks,
Michele

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