AWK script for me

Ini script utk kira performance metric seperti berikut

AWK Script for calculating the Send, Received, Dropped Packets, Received Packets, Packet Delivery Ratio and Average end to End Delay

    BEGIN {
seqno = -1; 
droppedPackets = 0;
receivedPackets = 0;
count = 0;
}
{
#packet delivery ratio
if($4 == "AGT" && $1 == "s" && seqno < $6) {
seqno = $6;
} else if(($4 == "AGT") && ($1 == "r")) {
receivedPackets++;
} else if ($1 == "D" && $7 == "tcp" && $8 > 512){
droppedPackets++; 
}
#end-to-end delay
if($4 == "AGT" && $1 == "s") {
start_time[$6] = $2;
} else if(($7 == "tcp") && ($1 == "r")) {
end_time[$6] = $2;
} else if($1 == "D" && $7 == "tcp") {
end_time[$6] = -1;
}
}  
END { 
for(i=0; i<=seqno; i++) {
if(end_time[i] > 0) {
delay[i] = end_time[i] - start_time[i];
count++;
}
else
{
delay[i] = -1;
}
}
for(i=0; i<count; i++) {
if(delay[i] > 0) {
n_to_n_delay = n_to_n_delay + delay[i];
} 
}
n_to_n_delay = n_to_n_delay/count;
print "\n";
print "GeneratedPackets = " seqno+1;
print "ReceivedPackets = " receivedPackets;
print "Packet Delivery Ratio = " receivedPackets/(seqno+1)*100
"%";
print "Total Dropped Packets = " droppedPackets;
print "Average End-to-End Delay = " n_to_n_delay * 1000 " ms";
print "\n";
}

source: http://stackoverflow.com