method

prefix

Ruby latest stable (v2_5_5) - 0 notes - Class: IPAddr

1_8_6_287
1_8_7_72
1_8_7_330
1_9_1_378
1_9_2_180
1_9_3_125
1_9_3_392
2_1_10
2_2_9
2_4_6
2_5_5 (0)
2_6_3 (0)
What's this?

prefix() public

Returns the prefix length in bits for the ipaddr.

# File lib/ipaddr.rb, line 427
  def prefix
    case @family
    when Socket::AF_INET
      n = IN4MASK ^ @mask_addr
      i = 32
    when Socket::AF_INET6
      n = IN6MASK ^ @mask_addr
      i = 128
    else
      raise AddressFamilyError, "unsupported address family"
    end
    while n.positive?
      n >>= 1
      i -= 1
    end
    i
  end

prefix

Related methods