Hi,
I am checking whether there are packets lost with ack field in the message of
sendDone event. My aim is to retransmit the packet in case of fails (means the
node don't receive an ack). To do this, I try to send the packet lost after a
random time. The problem of this is that the packet retransmitted still not
received. I do the retransmission several times but it still not successfully
received. I don't know why it is not received. I would like to know how to
retransmit the packet that it is not successfully received.
The code of retransmission that I do in sendDone event is as follow:
event result_t SendBootMsg.sendDone( TOS_MsgPtr pmsg, result_t success ) {
TOS_MsgPtr buffer;
double random;
buffer=pmsg;
if(pmsg->ack==1){
dbg(DBG_USR2," Ack=1. No collision\n");
}else{
dbg(DBG_USR2,"Ack=0.Collision\n");
stat_helo_lost++;
random=((call Random.rand())*1.0 /((uint16_t)- 1));//between 0 an 1
//dbg(DBG_USR1,"random=%f\n",random);
call Resend_Packet_again_Timer.start(TIMER_ONE_SHOT,random*100*1024);// try to
send it again
}//ack
}//sendDone
Thank you for your answer,
Best regards,
sofiane
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