[ns] Bug in ns-2.1b7?

[German Madinabeitia Luque <german@trajano.us.es>]

I think there is a bug in the modification introduced in October 2000
at pareto.cc.

The new member variable rng_ at the POO_Traffic class is uninitialised
if the user does not specify his own RNG object, promoting a
segmentation fault while running simulations which use the traffic
generates according to a Pareto On/Off distribution.

This problem arises running ns-2.1b7 in an i386 Linux RedHat-7.0

The following patch resolves this problem:

    --- ../ns-2.1b7.orig/pareto.cc  Fri Oct 13 16:05:13 2000
    +++ ./pareto.cc Sun Mar 18 19:08:20 2001
    @@ -96,6 +96,7 @@
            bind_bw("rate_", &rate_);
            bind("shape_", &shape_);
            bind("packetSize_", &size_);
    +       rng_ = NULL;
     }
     
     void POO_Traffic::init()


Germ�n Madinabeitia Luque
�rea de Ingenier�a Telem�tica
Universidad de Sevilla
SPAIN