#
# A router implementation in Trema
#
# Copyright (C) 2013 NEC Corporation
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License, version 2, as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#

require 'arp-table'
require 'routing-table'

require 'pio'

class Interface
  attr_reader :hwaddr
  attr_reader :ipaddr
  attr_reader :masklen
  attr_reader :port

  def initialize(options)
    @port = options[:port]
    @hwaddr = Pio::Mac.new(options[:hwaddr])
    @ipaddr = Pio::IPv4Address.new(options[:ipaddr])
    @masklen = options[:masklen]
  end

  def has?(mac)
    mac == hwaddr
  end
end

class Interfaces
  def initialize(interfaces = [])
    @list = []
    interfaces.each do |each|
      @list << Interface.new(each)
    end
  end

  def find_by_port(port)
    @list.find do |each|
      each.port == port
    end
  end

  def find_by_ipaddr(ipaddr)
    @list.find do |each|
      each.ipaddr.to_i == ipaddr.to_i
    end
  end

  def find_by_prefix(ipaddr)
    @list.find do |each|
      masklen = each.masklen
      each.ipaddr.mask(masklen).to_s == ipaddr.mask(masklen).to_s
    end
  end

  def find_by_port_and_ipaddr(port, ipaddr)
    @list.find do |each|
      each.port == port && each.ipaddr.to_i == ipaddr.to_i
    end
  end

  def ours?(port, macda)
    true if macda.broadcast?

    interface = find_by_port(port)
    unless interface.nil? && interface.has?(macda)
      true
    end
  end
end

### Local variables:
### mode: Ruby
### coding: utf-8
### indent-tabs-mode: nil
### End: