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require 'ipaddress/extensions/extensions'
module IPAddress
#
# Checks if the given string is a valid IP address,
# either IPv4 or IPv6
#
# Example:
#
# IPAddress::valid? "2002::1"
# #=> true
#
# IPAddress::valid? "10.0.0.256"
# #=> false
#
def self.valid?(addr)
valid_ipv4?(addr) || valid_ipv6?(addr)
end
def self.valid_ipv4?(addr)
if /\A(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\Z/ =~ addr
return $~.captures.all? {|i| i.to_i < 256}
end
false
end
#
# Checks if the argument is a valid IPv4 netmark
# expressed in dotted decimal format.
#
# IPAddress.valid_ipv4_netmask? "255.255.0.0"
# #=> true
#
def self.valid_ipv4_netmask?(addr)
arr = addr.split(".").map{|i| i.to_i}.pack("CCCC").unpack("B*").first.scan(/01/)
arr.empty? && valid_ipv4?(addr)
rescue
return false
end
def self.valid_ipv6?(addr)
# IPv6 (normal)
return true if /\A[\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*\Z/ =~ addr
return true if /\A[\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*::([\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*)?\Z/ =~ addr
return true if /\A::([\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*)?\Z/ =~ addr
# IPv6 (IPv4 compat)
return true if /\A[\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*:/ =~ addr && valid_ipv4?($')
return true if /\A[\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*::([\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*:)?/ =~ addr && valid_ipv4?($')
return true if /\A::([\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*:)?/ =~ addr && valid_ipv4?($')
false
end
class IPBase
end
end # module IPAddress
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