Packet length in "TrafficGen" application

[Sarra Sarah]

Hi,

I want to set the packet size, is it true to put it in the "headerlength"parameter of "TrafficGen" application? if yes, why it is nommed "headerlength" instead of "packetLength"? 

In "TrafficGen.cc":

ApplPkt *pkt = new ApplPkt("BROADCAST_MESSAGE", TRAFFIC_GEN_PACKET);

pkt->setDestAddr(LAddress::L3BROADCAST);

// we use the host modules getIndex() as a appl address

pkt->setSrcAddr( myApplAddr() );

pkt->setBitLength(headerLength);

The packetLength is the size of only the data or data with header? 

What is the maximum packet size of ieee802.15.4? 

Any help please to set the packet size.