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Full Discussion: Convert ip ranges to CIDR netblock
Top Forums Shell Programming and Scripting Convert ip ranges to CIDR netblock Post 303027382 by vgersh99 on Friday 14th of December 2018 11:56:12 AM
Old 12-14-2018
Looks like an old branch of gawk with non-POSIX extensions.
Probably a buggy and/or not so forgiving as gawk...
The BUGS section at the bottom of the man page might give some hints of what can be tweaked to make it run...
Stick with gawk if it's an option, or get a newer version of a native BSD version of awk.

P.S. I'm getting the following timing with gawk under Cygwin with the referenced file:
Code:
real    0m12.081s
user    0m10.202s
sys     0m0.967s

with the slightly modified awk code:
Code:
function range2cidr(ipStart, ipEnd, bits, mask, newip) {
    bits = 1
    mask = 1
    while (bits < 32) {
        newip = or(ipStart, mask)
        if ((newip>ipEnd) || ((lshift(rshift(ipStart,bits),bits)) != ipStart)) {
           bits--
           mask = rshift(mask,1)
           break
        }
        bits++
        mask = lshift(mask,1)+1
    }
    newip = or(ipStart, mask)
    bits = 32 - bits
    result = dec2ip(ipStart) "/" bits
    if (newip < ipEnd) result = range2cidr(newip + 1, ipEnd)
    return result
}

# convert dotted quads to long decimal ip
#       int ip2dec("192.168.0.15")
#
function ip2dec(ip, slice) {
        split(ip, slice, ".")
        return (slice[1] * 2^24) + (slice[2] * 2^16) + (slice[3] * 2^8) + slice[4]
}

# convert decimal long ip to dotted quads
#       str dec2ip(1171259392)
#
function dec2ip(dec, ip, quad) {
        for (i=3; i>=1; i--) {
                quad = 256^i
                ip = ip int(dec/quad) "."
                dec = dec%quad
        }
        return ip dec
}

function sanitize(ip) {
        split(ip, slice, ".")
        return slice[1]/1 "." slice[2]/1 "." slice[3]/1 "." slice[4]/1
}

BEGIN{
        FS="[- :]"
}

# sanitize ip's
!/^#/ && NF {$1 = sanitize($(NF-1)); $2 = sanitize($NF)}

!/^#/ && NF {print range2cidr(ip2dec($(NF-1)), ip2dec($NF))}

END {print ""}

Last edited by vgersh99; 12-14-2018 at 01:18 PM..
This User Gave Thanks to vgersh99 For This Post:
azdps
 

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LEARN ABOUT SUNOS

iconv_dhn

iconv_dhn(5)						Standards, Environments, and Macros					      iconv_dhn(5)

NAME

       iconv_dhn - code set conversion tables for DHN (Dom Handlowy Nauki)

DESCRIPTION

       The following code set conversions are supported:

       +--------------------------------------------------------------------+
       |		  Code Set Conversions Supported		    |
       +--------------+--------+--------------+--------+--------------------+
       |    Code      |Symbol  |Target Code   |Symbol  |   Target Output    |
       +--------------+--------+--------------+--------+--------------------+
       |DHN	      |dhn     |ISO 8859-2    |iso2    | ISO Latin 2	    |
       +--------------+--------+--------------+--------+--------------------+
       |DHN	      |dhn     |MS 1250       |win2    | Windows Latin 2    |
       +--------------+--------+--------------+--------+--------------------+
       |DHN	      |dhn     |MS 852	      |dos2    | MS-DOS Latin 2     |
       +--------------+--------+--------------+--------+--------------------+
       |DHN	      |dhn     |Mazovia       |maz     | Mazovia	    |
       +--------------+--------+--------------+--------+--------------------+

CONVERSIONS

       The conversions are performed according to the following tables. All values in the tables are given in octal.

   DHN to ISO 8859-2
       For the conversion of DHN to ISO 8859-2, all characters not in the following table are mapped unchanged.

       +-----------------------------------------------------------------+
       |	       |     Conversions|Performed	 |		 |
       |     DHN       |  ISO 8859-2	|     DHN	 |  ISO 8859-2	 |
       |24-177	       | 40		|222		 |40		 |
       |200	       | 241		|223		 |364		 |
       |201	       | 306		|224		 |366		 |
       |202	       | 312		|225-230	 |40		 |
       |203	       | 243		|231		 |326		 |
       |204	       | 321		|232		 |334		 |
       |205	       | 323		|233-237	 |40		 |
       |206	       | 246		|240		 |341		 |
       |207	       | 254		|241		 |355		 |
       |210	       | 257		|242		 |363		 |
       |211	       | 261		|243		 |372		 |
       |212	       | 346		|244-340	 |40		 |
       |213	       | 352		|341		 |337		 |
       |214	       | 263		|342-365	 |40		 |
       |215	       | 361		|366		 |367		 |
       |216	       | 363		|367		 |40		 |
       |217	       | 266		|370		 |260		 |
       |220	       | 274		|371-376	 |40		 |
       |221	       | 277		|		 |		 |
       +---------------+----------------+----------------+---------------+

   DHN to MS 1250
       For the conversion of DHN to MS 1250, all characters not in the following table are mapped unchanged.

       +-----------------------------------------------------------------+
       |	       |     Conversions|Performed	 |		 |
       |     DHN       |    MS 1250	|     DHN	 |   MS 1250	 |
       |200	       | 245		|233-237	 |40		 |
       |201	       | 306		|240		 |341		 |
       |202	       | 312		|241		 |355		 |
       |203	       | 243		|242		 |363		 |
       |204	       | 321		|243		 |372		 |
       |205	       | 323		|244-251	 |40		 |
       |206	       | 214		|252		 |254		 |
       |207	       | 217		|253-255	 |40		 |
       |210	       | 257		|256		 |253		 |
       |211	       | 271		|257		 |273		 |
       |212	       | 346		|260-340	 |40		 |
       |213	       | 352		|341		 |337		 |
       |214	       | 263		|342-345	 |40		 |
       |215	       | 361		|346		 |265		 |
       |216	       | 363		|347-360	 |40		 |
       |217	       | 234		|361		 |261		 |
       |220	       | 237		|362-365	 |40		 |
       |221	       | 277		|366		 |367		 |
       |222	       | 40		|367		 |40		 |
       |223	       | 364		|370		 |260		 |
       |224	       | 366		|371		 |40		 |
       |225-230        | 40		|372		 |267		 |
       |231	       | 326		|373-376	 |40		 |
       |232	       | 334		|		 |		 |
       +---------------+----------------+----------------+---------------+

   DHN to MS 852
       For the conversion of DHN to MS 852, all characters not in the following table are mapped unchanged.

       +-----------------------------------------------------------------+
       |	       |     Conversions|Performed	 |		 |
       |     DHN       |    MS 852	|     DHN	 |    MS 852	 |
       |200	       | 244		|212		 |206		 |
       |201	       | 217		|213		 |251		 |
       |202	       | 250		|214		 |210		 |
       |203	       | 235		|215		 |344		 |
       |204	       | 343		|216		 |242		 |
       |205	       | 340		|217		 |230		 |
       |206	       | 227		|220		 |253		 |
       |207	       | 215		|221		 |276		 |
       |210	       | 275		|222-375	 |40		 |
       |211	       | 245		|		 |		 |
       +---------------+----------------+----------------+---------------+

   DHN to Mazovia
       For the conversion of DHN to Mazovia, all characters not in the following table are mapped unchanged.

       +-----------------------------------------------------------------+
       |	       |     Conversions|Performed	 |		 |
       |     DHN       |    Mazovia	|     DHN	 |   Mazovia	 |
       |200	       | 217		|212		 |215		 |
       |201	       | 225		|213		 |221		 |
       |202	       | 220		|214		 |222		 |
       |203	       | 234		|215		 |244		 |
       |204	       | 245		|216		 |242		 |
       |205	       | 243		|217		 |236		 |
       |206	       | 230		|220		 |246		 |
       |207	       | 240		|221		 |247		 |
       |210	       | 241		|222-247	 |40		 |
       |211	       | 206		|		 |		 |
       +---------------+----------------+----------------+---------------+

FILES

       /usr/lib/iconv/*.so	       conversion modules

       /usr/lib/iconv/*.t	       conversion tables

       /usr/lib/iconv/iconv_data       list of conversions supported by conversion tables

SEE ALSO

       iconv(1), iconv(3C), iconv(5)

SunOS 5.10							    18 Apr 1997 						      iconv_dhn(5)
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