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# Validates IP addresses
#
# @author Kim Nørgaard <jasen@jasen.dk>
class IpValidator < ActiveModel::EachValidator
IPV4_REGEX = /^
(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}
(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)
$/x
IPV6_REGEX = /^
(
(([0-9A-Fa-f]{1,4}:){7}[0-9A-Fa-f]{1,4})
|(([0-9A-Fa-f]{1,4}:){6}:[0-9A-Fa-f]{1,4})
|(([0-9A-Fa-f]{1,4}:){5}:([0-9A-Fa-f]{1,4}:)?[0-9A-Fa-f]{1,4})
|(([0-9A-Fa-f]{1,4}:){4}:([0-9A-Fa-f]{1,4}:){0,2}[0-9A-Fa-f]{1,4})
|(([0-9A-Fa-f]{1,4}:){3}:([0-9A-Fa-f]{1,4}:){0,3}[0-9A-Fa-f]{1,4})
|(([0-9A-Fa-f]{1,4}:){2}:([0-9A-Fa-f]{1,4}:){0,4}[0-9A-Fa-f]{1,4})
|(([0-9A-Fa-f]{1,4}:){6}((\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b)\.){3}(\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b))
|(([0-9A-Fa-f]{1,4}:){0,5}:((\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b)\.){3}(\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b))
|(::([0-9A-Fa-f]{1,4}:){0,5}((\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b)\.){3}(\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b))
|([0-9A-Fa-f]{1,4}::([0-9A-Fa-f]{1,4}:){0,5}[0-9A-Fa-f]{1,4})
|(::([0-9A-Fa-f]{1,4}:){0,6}[0-9A-Fa-f]{1,4})
|(([0-9A-Fa-f]{1,4}:){1,7}:)
)$/x
# @param [Hash] options Options for validation
# @option options [Symbol] :ip_type (:any) The IP address type (:any, :v4 or :v6)
# @see ActiveModel::EachValidator#new
def initialize(options)
options[:ip_type] ||= :any
super
end
def validate_each(record, attribute, value)
case options[:ip_type]
when :v4
record.errors.add(attribute, options[:message] || :ipv4) unless ipv4?(value)
when :v6
record.errors.add(attribute, options[:message] || :ipv6) unless ipv6?(value)
else
record.errors.add(attribute, options[:message] || :ip) unless ip?(value)
end
end
private
# Validates IPv4 address
# @param [String] address the ipv4 address
# @return [Boolean] the validation result
def ipv4?(address)
address =~ IPV4_REGEX
end
# Validates IPv6 address
# @param [String] address the ipv6 address
# @return [Boolean] the validation result
def ipv6?(address)
address =~ IPV6_REGEX
end
# Validates IP (v4 or v6) address
# @param [String] address the ip address
# @return [Boolean] the validation result
def ip?(address)
ipv4?(address) || ipv6?(address)
end
end