[ns] Packet creation

["J.Madhan Mohan" <madhan80@eth.net>]

I  want to create a Packet in a agent and send it.

I do the following 


Packet *p = allocpkt( ) ;        or Packet *p = Packet::alloc( );
hdr_cmn *hdrc = HDR_CMN(p);
hdrc->next_hop_ = MAC_BROADCAST;
hdrc->size( )  += IP_HDR_LEN;
target_->recv(p,(Handler *)0);

I tried to define many other parameters of common header.
But I always get a Segmentation Fault Error.
The packet type used is PT_MESSAGE ( when this agent is created I pass
PT_MESSAGE as parameter for Agent superclass).

Thank You
Madhan