void ShowPkt(struct PACKET *pkt, struct sockaddr_in *from)

{

if (from!=NULL)

printf("received packet from %s from port %d\n",inet_ntoa(from->sin_addr),ntohs(from->sin_port));

printf("packet: DestIP = %s\n",pkt->DestIP);

printf(" DestPort = %d\n",pkt->DestPort);

printf(" SourceIP = %s\n",pkt->SourceIP);

printf(" SourcePort = %d\n",pkt->SourcePort);

if (pkt->PktType == DATA_PKT)

            {

        printf("Data pkt: Data=%c SeqNum=%d\n", pkt->Data, pkt->SeqOrACKNum);

            }

            else

            {

        printf("ACK pkt: ACKNum=%d\n", pkt->SeqOrACKNum);

            }

}