libnet-netmask-perl - 1.9104-1 main

Net::Netmask parses and understands IPv4 and IPv6 CIDR blocks. It's built
with an object-oriented interface, with functions being methods that operate
on a Net::Netmask object.
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These methods provide nearly all types of information about a network block
that you might want.
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There are also functions to insert a network block into a table and then
later lookup network blocks by IP address using that table. There are
functions to turn a IP address range into a list of CIDR blocks. There are
functions to turn a list of CIDR blocks into a list of IP addresses.
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There is a function for sorting by text IP address.
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All functions understand both IPv4 and IPv6. Matches, finds, etc, will always
return false when an IPv4 address is matched against an IPv6 address.