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inoueissei / file0.txt
Created October 30, 2015 07:47
Ruby NetAddr Package ref: http://qiita.com/inoueissei/items/f2d695087c2f61f5bb1b
require 'netaddr'
netaddr1 = NetAddr::CIDR.create('192.168.1.0/24')
# broadcastアドレスを算出
bc_address = netaddr1.last
# 数値化して1引く
gateway_int = NetAddr::CIDR.create(bc_address).to_i - 1
# その数値をアドレス表記に戻す