#!/usr/bin/env ruby
# -*- coding: binary -*-

require 'ipaddr'

module Rex
module Post
module Meterpreter
module Extensions
module Stdapi
module Net

###
#
# This class represents a logical physical interface
# on the remote machine.
#
###
class Interface

	##
	#
	# Constructor
	#
	##

	#
	# Returns a logical interface and initializes it to the supplied
	# parameters.
	#
	def initialize(opts={})
		self.index    = opts[:index] || -1
		self.mac_addr = opts[:mac_addr]
		self.mac_name = opts[:mac_name]
		self.mtu      = opts[:mtu]
		self.flags    = opts[:flags]
		self.addrs    = opts[:addrs]
		self.netmasks = opts[:netmasks]
		self.scopes   = opts[:scopes]
	end

	#
	# Returns a pretty string representation of the interface's properties.
	#
	def pretty
		macocts = []
		mac_addr.each_byte { |o| macocts << o }
		macocts += [0] * (6 - macocts.size) if macocts.size < 6

		info = [
			["Name"         , mac_name  ],
			["Hardware MAC" , sprintf("%02x:%02x:%02x:%02x:%02x:%02x",
				macocts[0], macocts[1], macocts[2],
				macocts[3], macocts[4], macocts[5])],
			["MTU"          , mtu       ],
			["Flags"        , flags     ],
		]

		# If all went as planned, addrs and netmasks will have the same number
		# of elements and be properly ordered such that they match up
		# correctly.
		addr_masks = addrs.zip(netmasks)

		addr_masks.select { |a| Rex::Socket.is_ipv4?(a[0]) }.each { |a|
			info << [ "IPv4 Address", a[0] ]
			info << [ "IPv4 Netmask", a[1] ]
		}
		addr_masks.select { |a| Rex::Socket.is_ipv6?(a[0]) }.each { |a|
			info << [ "IPv6 Address", a[0] ]
			info << [ "IPv6 Netmask", a[1] ]
		}

		pad = info.map{|i| i[0] }.max_by{|k|k.length}.length

		ret = sprintf(
				"Interface %2d\n" +
				"============\n",
				index
			)

		info.map {|k,v|
			next if v.nil?
			ret << k.ljust(pad) + " : #{v}\n"
		}

		ret
	end

	#
	# The first address associated with this Interface
	#
	def ip
		addrs.first
	end

	#
	# The index of the interface.
	#
	attr_accessor :index
	#
	# An Array of IP addresses bound to the Interface.
	#
	attr_accessor :addrs
	#
	# The physical (MAC) address of the NIC.
	#
	attr_accessor :mac_addr
	#
	# The name of the interface.
	#
	attr_accessor :mac_name
	#
	# The MTU associated with the interface.
	#
	attr_accessor :mtu
	#
	# The flags associated with the interface.
	#
	attr_accessor :flags
	#
	# An Array of netmasks. This will have the same number of elements as #addrs
	#
	attr_accessor :netmasks
	#
	# An Array of IPv6 address scopes. This will have the same number of elements as #addrs
	#
	attr_accessor :scopes
end

end; end; end; end; end; end
