awk parser

BEGIN {
    recv_bytes = 0;
    start_time = 999999;
    stop_time = 0;
    total_delay = 0;

    send_pkt = 0;
    recv_pkt = 0;
    drop_pkt = 0;
}
{
    event = $1;
    time = $2;
    trace_type = $4;
    pkt_id = $6;
    pkt_type = $7;    # Column 7 is the packet type (e.g., cbr, tcp, AODV)
    pkt_size = $8;

    # 1. Track exactly how many packets are SENT from the Application layer
    if (event == "s" && trace_type == "AGT") {
        send_pkt++;
        send_time[pkt_id] = time;
    }

    # 2. Track exactly how many packets are RECEIVED at the Application layer
    if (event == "r" && trace_type == "AGT") {
        recv_bytes += pkt_size;
        recv_pkt++;

        if (pkt_id in send_time) {
            delay = time - send_time[pkt_id];
            total_delay += delay;
        }

        if (time < start_time) {
            start_time = time;
        }
        if (time > stop_time) {
            stop_time = time;
        }
    }

    # 3. Track packets DROPPED anywhere in the network (MAC, Router, or Queue layer)
    # We only count data packets (tcp or cbr), ignoring dropped routing packets
    if (event == "D" && (pkt_type == "cbr" || pkt_type == "tcp")) {
        drop_pkt++;
    }
}
END {
    duration = stop_time - start_time;

    # Calculate Packet Delivery Ratio (PDR) as a percentage
    if (send_pkt > 0) {
        pdr = (recv_pkt / send_pkt) * 100;
    } else {
        pdr = 0;
    }

    if (recv_pkt > 0) {
        throughput = (recv_bytes * 8) / duration / 1000;
        avg_delay = (total_delay / recv_pkt) * 1000;

        printf "========================================\n";
        printf "          SIMULATION SCOREBOARD         \n";
        printf "========================================\n";
        printf "Total Packets Sent  : %d\n", send_pkt;
        printf "Total Packets Recv  : %d\n", recv_pkt;
        printf "Total Packets Drop  : %d\n", drop_pkt;
        printf "Packet Delivery Ratio: %.2f %%\n", pdr;
        printf "----------------------------------------\n";
        printf "Total Data Received : %d bytes\n", recv_bytes;
        printf "Simulation Duration : %.2f seconds\n", duration;
        printf "Overall Throughput  : %.2f kbps\n", throughput;
        printf "Average E2E Delay   : %.2f ms\n", avg_delay;
        printf "========================================\n";
    } else {
        print "No data packets were received at the AGT layer.";
    }
}