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Checking range of ips

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# 8  
Old 11-07-2013
Yes this is a little inefficient as it calculates the value of the input IP twice for each line.

this should work a little quicker:

Code:
awk -F, -v I="218.30.103.106" '
function ip2dec(ip, slice) {
    gsub(/"/,"",ip)
    split(ip, slice, ".")
    return (slice[1] * 2^24) + (slice[2] * 2^16) + (slice[3] * 2^8) + slice[4]
}
BEGIN {v=ip2dec(I)}
v>=ip2dec($1) && v<=ip2dec($2){print $6}' country.txt

---------- Post updated at 06:39 AM ---------- Previous update was at 06:32 AM ----------

Can also get rid of the gsub() call :

Code:
awk -F '[",]+' -v I="218.30.103.106" '
function ip2dec(ip, slice) {
        split(ip, slice, ".")
        return (slice[1] * 2^24) + (slice[2] * 2^16) + (slice[3] * 2^8) + slice[4]
}
BEGIN {v=ip2dec(I)}
v>=ip2dec($2) && v<=ip2dec($3){print $7}' country.txt

This User Gave Thanks to Chubler_XL For This Post:
SkySmart
# 9  
Old 11-07-2013
Quote:
Originally Posted by Chubler_XL
Yes this is a little inefficient as it calculates the value of the input IP twice for each line.

this should work a little quicker:

Code:
awk -F, -v I="218.30.103.106" '
function ip2dec(ip, slice) {
    gsub(/"/,"",ip)
    split(ip, slice, ".")
    return (slice[1] * 2^24) + (slice[2] * 2^16) + (slice[3] * 2^8) + slice[4]
}
BEGIN {v=ip2dec(I)}
v>=ip2dec($1) && v<=ip2dec($2){print $6}' country.txt

---------- Post updated at 06:39 AM ---------- Previous update was at 06:32 AM ----------

Can also get rid of the gsub() call :

Code:
awk -F '[",]+' -v I="218.30.103.106" '
function ip2dec(ip, slice) {
        split(ip, slice, ".")
        return (slice[1] * 2^24) + (slice[2] * 2^16) + (slice[3] * 2^8) + slice[4]
}
BEGIN {v=ip2dec(I)}
v>=ip2dec($2) && v<=ip2dec($3){print $7}' country.txt

the first example, with the gsub included appears to be the fastest.

again thank you Smilie
# 10  
Old 11-07-2013
If you have a file full of IPs to lookup it can be made more efficient again.
# 11  
Old 11-07-2013
Quote:
Originally Posted by Chubler_XL
If you have a file full of IPs to lookup it can be made more efficient again.
really? how so? i'd really like to know. i just tried it on a list of IPs and it took a while.
# 12  
Old 11-07-2013
something like this:

Code:
awk -F '[",]+' '
function ip2dec(ip, slice) {
    split(ip, slice, ".")
    return (slice[1] * 2^24) + (slice[2] * 2^16) + (slice[3] * 2^8) + slice[4]
}
FNR==NR{n[ip2dec($1)]=$1;next}
{
   f=ip2dec($2);
   t=ip2dec($3);
   for(v in n) if(v>=f&&v<=t) {
       print n[v] "," $7;
       delete n[v];
   }
}
END {for(v in n) print n[v] ",UNKNOWN" } ' ips.txt country.txt

This User Gave Thanks to Chubler_XL For This Post:
SkySmart
# 13  
Old 11-07-2013
Quote:
Originally Posted by Chubler_XL
something like this:

Code:
awk -F '[",]+' '
function ip2dec(ip, slice) {
    split(ip, slice, ".")
    return (slice[1] * 2^24) + (slice[2] * 2^16) + (slice[3] * 2^8) + slice[4]
}
FNR==NR{n[ip2dec($1)]=$1;next}
{
   f=ip2dec($2);
   t=ip2dec($3);
   for(v in n) if(v>=f&&v<=t) {
       print n[v] "," $7;
       delete n[v];
   }
}
END {for(v in n) print n[v] ",UNKNOWN" } ' ips.txt country.txt


now that's just marvelous!!!!!!!!!!!!
# 14  
Old 11-08-2013
If your file is reliably set up in a way that $4 and $5 are the decimal notations of $2 and $3, then using those instead of f and t (eliminating 2 ip2dec calls per line!) will again speed things up (a little).
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