method
mask!
mask!(mask)
protected
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# File lib/ipaddr.rb, line 356 def mask!(mask) if mask.kind_of?(String) if mask =~ /^\d+$/ prefixlen = mask.to_i else m = IPAddr.new(mask) if m.family != @family raise ArgumentError, "address family is not same" end @mask_addr = m.to_i @addr &= @mask_addr return self end else prefixlen = mask end case @family when Socket::AF_INET if prefixlen < 0 || prefixlen > 32 raise ArgumentError, "invalid length" end masklen = 32 - prefixlen @mask_addr = ((IN4MASK >> masklen) << masklen) when Socket::AF_INET6 if prefixlen < 0 || prefixlen > 128 raise ArgumentError, "invalid length" end masklen = 128 - prefixlen @mask_addr = ((IN6MASK >> masklen) << masklen) else raise "unsupported address family" end @addr = ((@addr >> masklen) << masklen) return self end