Converts network mask to CIDR format.
@return [Integer] CIDR representation of address mask
# File lib/occi/monkey_island/ipaddr.rb, line 11 def cidr_mask case family when Socket::AF_INET AF_INET_FULL_MASK - Math.log2((1 << AF_INET_FULL_MASK) - mask_addr).to_i when Socket::AF_INET6 AF_INET6_FULL_MASK - Math.log2((1 << AF_INET6_FULL_MASK) - mask_addr).to_i else raise AddressFamilyError, 'unsupported address family' end end