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Top Forums Shell Programming and Scripting Convert ip ranges to CIDR netblock Post 303027586 by azdps on Wednesday 19th of December 2018 04:53:29 PM
Old 12-19-2018
Thanks that fixed it. Overall there is a flaw in the script somewhere though. There are approx 470 IP ranges in the downloaded file that are converted wrong. For example these aren't converted correctly:

Code:
1.62.189.215 - 1.62.189.222
4.0.25.146 - 4.0.25.148
4.0.26.14 - 4.0.29.24
24.149.30.0 - 24.149.30.4

The script converts the above IP ranges to this:
Code:
1.62.189.222/32
4.0.25.148/32
4.0.29.24/32
24.149.30.4/32

They should have been converted to:
Code:
1.62.189.215/32
1.62.189.216/30
1.62.189.220/31
1.62.189.222/32
4.0.25.146/31
4.0.25.148/32
4.0.26.14/31
4.0.26.16/28
4.0.26.32/27
4.0.26.64/26
4.0.26.128/25
4.0.27.0/24
4.0.28.0/24
4.0.29.0/28
4.0.29.16/29
4.0.29.24/32
24.149.30.0/30
24.149.30.4/32

I discovered this issue while using ipcalc which accurately converts the IP ranges. The IP ranges in question convert to several CIDR blocks instead of one. The vast majority of IP address ranges in the file convert to only one CIDR block which are correct.

Anyone interested in fixing the script?

Last edited by azdps; 12-19-2018 at 05:59 PM..
 

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Locale::Script(3pm)					 Perl Programmers Reference Guide				       Locale::Script(3pm)

NAME
Locale::Script - standard codes for script identification SYNOPSIS
use Locale::Script; $script = code2script('phnx'); # 'Phoenician' $code = script2code('Phoenician'); # 'Phnx' $code = script2code('Phoenician', LOCALE_CODE_NUMERIC); # 115 @codes = all_script_codes(); @scripts = all_script_names(); DESCRIPTION
The "Locale::Script" module provides access to standards codes used for identifying scripts, such as those defined in ISO 15924. Most of the routines take an optional additional argument which specifies the code set to use. If not specified, the default ISO 15924 four-letter codes will be used. SUPPORTED CODE SETS
There are several different code sets you can use for identifying scripts. A code set may be specified using either a name, or a constant that is automatically exported by this module. For example, the two are equivalent: $script = code2script('phnx','alpha'); $script = code2script('phnx',LOCALE_SCRIPT_ALPHA); The codesets currently supported are: alpha, LOCALE_SCRIPT_ALPHA This is a set of four-letter (capitalized) codes from ISO 15924 such as 'Phnx' for Phoenician. It also includes additions to this set included in the IANA language registry. The Zxxx, Zyyy, and Zzzz codes are not used. This is the default code set. num, LOCALE_SCRIPT_NUMERIC This is a set of three-digit numeric codes from ISO 15924 such as 115 for Phoenician. ROUTINES
code2script ( CODE [,CODESET] ) script2code ( NAME [,CODESET] ) script_code2code ( CODE ,CODESET ,CODESET2 ) all_script_codes ( [CODESET] ) all_script_names ( [CODESET] ) Locale::Script::rename_script ( CODE ,NEW_NAME [,CODESET] ) Locale::Script::add_script ( CODE ,NAME [,CODESET] ) Locale::Script::delete_script ( CODE [,CODESET] ) Locale::Script::add_script_alias ( NAME ,NEW_NAME ) Locale::Script::delete_script_alias ( NAME ) Locale::Script::rename_script_code ( CODE ,NEW_CODE [,CODESET] ) Locale::Script::add_script_code_alias ( CODE ,NEW_CODE [,CODESET] ) Locale::Script::delete_script_code_alias ( CODE [,CODESET] ) These routines are all documented in the Locale::Codes::API man page. SEE ALSO
Locale::Codes The Locale-Codes distribution. Locale::Codes::API The list of functions supported by this module. http://www.unicode.org/iso15924/ Home page for ISO 15924. http://www.iana.org/assignments/language-subtag-registry The IANA language subtag registry. AUTHOR
See Locale::Codes for full author history. Currently maintained by Sullivan Beck (sbeck@cpan.org). COPYRIGHT
Copyright (c) 1997-2001 Canon Research Centre Europe (CRE). Copyright (c) 2001-2010 Neil Bowers Copyright (c) 2010-2013 Sullivan Beck This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.18.2 2013-11-04 Locale::Script(3pm)
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