Class: HashiCorp::VagrantVMwareDesktop::Helper::RoutingTable

Inherits:
Object
  • Object
show all
Defined in:
lib/vagrant-vmware-desktop/helper/routing_table.rb

Overview

This class reads the TCP/IP routing table for the current host. On Mac OS X and Linux machines, ‘netstat` is used. Windows is not currently implemented, but similar applications are installed by default.

Instance Method Summary collapse

Constructor Details

#initialize ⇒ RoutingTable

Returns a new instance of RoutingTable.



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# File 'lib/vagrant-vmware-desktop/helper/routing_table.rb', line 20

def initialize
  if Vagrant::Util::Platform.darwin?
    @table = read_table_darwin
  elsif Vagrant::Util::Platform.linux?
    @table = read_table_linux
  elsif Vagrant::Util::Platform.windows?
    @table = read_table_windows
  else
    raise Errors::RoutingTableUnsupportedOS
  end
end

Instance Method Details

#device_for_route(ip) ⇒ Object

This will return the device that the given IP would be routed to, or ‘nil` if it would just route to the default route.

Parameters:

  • ip (String) —

    The IP address.



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# File 'lib/vagrant-vmware-desktop/helper/routing_table.rb', line 36

def device_for_route(ip)
  return @table[ip] if @table.has_key?(ip)

  smallest = nil
  smallest_size = nil
  @table.each do |destination, interface|
    if destination.include?(IPAddr.new(ip))
      # Ruby 2.0 adds a "size" operator to Range, which we should
      # use when we switch to it.
      ip_range = destination.to_range
      ip_size = ip_range.max.to_i - ip_range.min.to_i
      if smallest_size.nil? || ip_size < smallest_size
        smallest = interface
        smallest_size = ip_size
      end
    end
  end

  smallest
end