Method: Rex::Socket.cidr_crack

Defined in:
lib/rex/socket.rb

.cidr_crack(cidr, v6 = false) ⇒ Object

Converts a CIDR subnet into an array (base, bcast)



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# File 'lib/rex/socket.rb', line 442

def self.cidr_crack(cidr, v6=false)
  tmp = cidr.split('/')

  tst,scope = tmp[0].split("%",2)
  scope     = "%" + scope if scope
  scope   ||= ""

  addr = addr_atoi(tst)

  bits = 32
  mask = 0
  use6 = false

  if (addr > 0xffffffff or v6 or cidr =~ /:/)
    use6 = true
    bits = 128
  end

  mask = (2 ** bits) - (2 ** (bits - tmp[1].to_i))
  base = addr & mask

  stop = base + (2 ** (bits - tmp[1].to_i)) - 1
  return [self.addr_itoa(base, use6) + scope, self.addr_itoa(stop, use6) + scope]
end