Module: BetterIpaddr::Constants::Regex

Defined in:

lib/better_ipaddr/constants.rb

Constant Summary

OCTET =

Regexp.union(
  /25[0-5]/,
  /2[0-4][0-9]/,
  /1[0-9][0-9]/,
  /[1-9][0-9]/,
  /[0-9]/
)

TRAILING_OCTET =

/\.#{OCTET}/

IPV4_PL =

Regexp.union(
  /3[0-2]/,
  /[1-2][0-9]/,
  /[0-9]/
)

IPV4 =

%r{\A#{OCTET}#{TRAILING_OCTET}{3}(?:\/#{IPV4_PL})?\z}

QUAD =

IPv6 regex adapted from stackoverflow.com/a/17871737

/[0-9a-zA-Z]{1,4}/

LEADING_QUAD =

/[0-9a-zA-Z]{1,4}:/

TRAILING_QUAD =

/:[0-9a-zA-Z]{1,4}/

IPV6_PL =

Regexp.union(
  /[0-9]/,
  /[1-9][0-9]/,
  /1[0-1][0-9]/,
  /12[0-8]/
)

IPV6_ADDRESS =

Regexp.union(
  # full
  /#{LEADING_QUAD}{7,7}#{QUAD}/,

  # zero-compressed
  /::/,
  /#{LEADING_QUAD}{1,7}:/,
  /:#{TRAILING_QUAD}{1,7}/,
  /#{LEADING_QUAD}{1,6}#{TRAILING_QUAD}{1,1}/,
  /#{LEADING_QUAD}{1,5}#{TRAILING_QUAD}{1,2}/,
  /#{LEADING_QUAD}{1,4}#{TRAILING_QUAD}{1,3}/,
  /#{LEADING_QUAD}{1,3}#{TRAILING_QUAD}{1,4}/,
  /#{LEADING_QUAD}{1,2}#{TRAILING_QUAD}{1,5}/,
  /#{LEADING_QUAD}{1,1}#{TRAILING_QUAD}{1,6}}/,

  # IPv4-mapped / -translated
  /::(ffff(:0{1,4}){0,1}:){0,1}#{IPV4}/,

  # IPv4 embedded
  /#{LEADING_QUAD}{1,4}:#{IPV4}/
)

IPV6 =

%r{\A#{IPV6_ADDRESS}(?:\/#{IPV6_PL})?\z}