[ns] one sender-multiple receivers

[Kwnstantina Palla]

Filippe and Anvay thank you very much for your reply!
I think that it can be done using UDP agents on each node and changing a
little the C++ code.
My thought is to make changes so that the sender can send to all nodes
through  defining iphdr->daddr() == IP_BROADCAST in the creation of the
packet. So i don't have to use more than one agent in each node or make a
loop in tcl.
I didn't try it yet, but i think it might work.
Please tell me your opinions.

(Filippe seuxaristw polu. Pes mou tin gnwmi sou an mporeis!)