lib/fog/proxmox/helpers/ip_helper.rb
# frozen_string_literal: true
# Copyright 2018 Tristan Robert
# This file is part of Fog::Proxmox.
# Fog::Proxmox is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# Fog::Proxmox is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with Fog::Proxmox. If not, see <http://www.gnu.org/licenses/>.
require 'resolv'
require 'fog/proxmox/hash'
module Fog
module Proxmox
# module IpHelper mixins
module IpHelper
CIDRv4_PREFIX = '([0-9]|[1-2][0-9]|3[0-2])'
CIDRv4_PREFIX_REGEXP = /^#{CIDRv4_PREFIX}$/
IPv4_SRC = "#{Resolv::IPv4::Regex.source.delete_suffix('\z').delete_prefix('\A')}"
CIDRv4_REGEXP = Regexp.new("\\A(#{IPv4_SRC})(\/#{CIDRv4_PREFIX})?\\z")
CIDRv6_PREFIX = '(\d+)'
CIDRv6_PREFIX_REGEXP = /^#{CIDRv6_PREFIX}$/xi
IPv6_SRC = "#{Resolv::IPv6::Regex_8Hex.source.delete_suffix('\z').delete_prefix('\A')}"
CIDRv6_REGEXP = Regexp.new("\\A(#{IPv6_SRC})(\/#{CIDRv6_PREFIX})?\\z", Regexp::EXTENDED | Regexp::IGNORECASE)
def self.cidr?(ip)
CIDRv4_REGEXP.match?(ip)
end
def self.cidr6?(ip)
CIDRv6_REGEXP.match?(ip)
end
def self.prefix(ip)
return unless cidr = CIDRv4_REGEXP.match(ip)
cidr[7]
end
def self.prefix6(ip)
return unless cidr = CIDRv6_REGEXP.match(ip)
cidr[3]
end
def self.ip?(ip)
Resolv::IPv4::Regex.match?(ip)
end
def self.ip6?(ip)
Resolv::IPv6::Regex.match?(ip)
end
def self.cidr_prefix?(prefix)
CIDRv4_PREFIX_REGEXP.match?(prefix)
end
def self.cidr6_prefix?(prefix)
CIDRv6_PREFIX_REGEXP.match?(prefix) && prefix.to_i >= 0 && prefix.to_i <= 128
end
def self.ip(ip)
return unless cidr = CIDRv4_REGEXP.match(ip)
cidr[1]
end
def self.ip6(ip)
return unless cidr = CIDRv6_REGEXP.match(ip)
cidr[1]
end
def self.to_cidr(ip, prefix = nil)
return nil unless ip?(ip) && (!prefix || cidr_prefix?(prefix))
cidr = "#{ip}"
cidr += "/#{prefix}" if cidr_prefix?(prefix)
cidr
end
def self.to_cidr6(ip, prefix = nil)
return nil unless ip6?(ip) && (!prefix || cidr6_prefix?(prefix))
cidr = "#{ip}"
cidr += "/#{prefix}" if cidr6_prefix?(prefix)
cidr
end
end
end
end