struct Packet_Send
{
      char destination_Add[4];//any code say "s4b2"  that wiill be rcver address
      char My_Add[4];             //  senders address
      char Packet[10];             //this is the exact data
      unsigned char Packet_Index;                //packet no
                                                                  //this is index to check if a data has been  
                                                                  //missed
}Packet_Send1;
main()
{
Packet_Send1.Packet_Index =1;  
strcpy(Packet_Send1.MyAdd,"SK");
strcpy(Packet_Send1.destination_Add,"IG");
strcpy(Packet_Send1.Packet_Add,"Hello IG");
send_RTS_Packet( Packet_Send1.destination_Add);
while( Rcv_ACK(Packet_Send1.destination_Add));

Send_Data_Packet(Packet_Send1.Packet,Packet_Send1.Packet_Index );

Packet_Send1.Packet_Index++;
strcpy(Packet_Send1.Packet_Add,"BYE  :bye ");
Send_Data_Packet(Packet_Send1.Packet,Packet_Send1.Packet_Index );

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}