Shell Programming and Scripting

awk -F"[:, ]" ' { now=mktime("2000 1 1 "$1" "$2" "$3); 
if (NR==1) printf("#Time Packets IPs New_IPs\n", to=now+10, new=0);
else {
    if (now >= to) {
           printf("%d %d %d %d\n", count+=10, found, length(IPs), new); 
           while((to+10) < now) printf("%d 0 0 0\n", count+=10, to+=10);
           delete PIPs;
           for (ip in IPs) PIPs[ip]=IPs[ip];
           delete IPs;
           new=found=0;
           to+=10; 
        }
}
found++;
IPs[$5]++;
if (!($5 in PIPs)) new++;
}
END { printf("%d %d %d %d\n", count + 10 - to + now, found, length(IPs), new); } ' logfile