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##
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# WARNING: Metasploit no longer maintains or accepts meterpreter scripts.
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# If you'd like to improve this script, please try to port it as a post
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# module instead. Thank you.
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##
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#
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# Meterpreter script for setting up a route from within a
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# Meterpreter session, without having to background the
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# current session.
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# Default options
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session = client
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subnet = nil
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netmask = "255.255.255.0"
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print_only = false
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remove_route = false
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remove_all_routes = false
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# Options parsing
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@@exec_opts = Rex::Parser::Arguments.new(
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  "-h" => [false, "Help and usage"],
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  "-s" => [true, "Subnet (IPv4, for example, 10.10.10.0)"],
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  "-n" => [true, "Netmask (IPv4, for example, 255.255.255.0"],
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  "-p" => [false, "Print active routing table. All other options are ignored"],
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  "-d" => [false, "Delete the named route instead of adding it"],
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  "-D" => [false, "Delete all routes (does not require a subnet)"]
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)
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# Defines usage
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def usage()
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  print_status "Usage:   run autoroute [-r] -s subnet -n netmask"
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  print_status "Examples:"
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  print_status "  run autoroute -s 10.1.1.0 -n 255.255.255.0  # Add a route to 10.10.10.1/255.255.255.0"
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  print_status "  run autoroute -s 10.10.10.1                 # Netmask defaults to 255.255.255.0"
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  print_status "  run autoroute -s 10.10.10.1/24              # CIDR notation is also okay"
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  print_status "  run autoroute -p                            # Print active routing table"
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  print_status "  run autoroute -d -s 10.10.10.1              # Deletes the 10.10.10.1/255.255.255.0 route"
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  print_status "Use the \"route\" and \"ipconfig\" Meterpreter commands to learn about available routes"
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  print_error "Deprecation warning: This script has been replaced by the post/multi/manage/autoroute module"
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end
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@@exec_opts.parse(args) { |opt, idx, val|
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  v = val.to_s.strip
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  case opt
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  when "-h"
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    usage
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    raise Rex::Script::Completed
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  when "-s"
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    if v =~ /[0-9\x2e]+\x2f[0-9]{1,2}/
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      subnet,cidr = v.split("\x2f")
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      netmask = Rex::Socket.addr_ctoa(cidr.to_i)
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    else
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      subnet = v
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    end
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  when "-n"
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    if (0..32) === v.to_i
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      netmask = Rex::Socket.addr_ctoa(v.to_i)
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    else
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      netmask = v
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    end
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  when "-p"
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    print_only = true
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  when "-d"
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    remove_route = true
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  when "-D"
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    remove_all_routes = true
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  end
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}
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def delete_all_routes
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  if Rex::Socket::SwitchBoard.routes.size > 0
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    routes = []
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    Rex::Socket::SwitchBoard.each do |route|
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      routes << {:subnet => route.subnet, :netmask => route.netmask}
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    end
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    routes.each {|route_opts| delete_route(route_opts)}
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    print_status "Deleted all routes"
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  else
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    print_status "No routes have been added yet"
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  end
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  raise Rex::Script::Completed
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end
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# Identical functionality to command_dispatcher/core.rb, and
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# nearly identical code
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def print_routes
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  if Rex::Socket::SwitchBoard.routes.size > 0
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    tbl =	Msf::Ui::Console::Table.new(
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      Msf::Ui::Console::Table::Style::Default,
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      'Header'  => "Active Routing Table",
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      'Prefix'  => "\n",
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      'Postfix' => "\n",
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      'Columns' =>
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        [
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          'Subnet',
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          'Netmask',
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          'Gateway',
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        ],
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      'ColProps' =>
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        {
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          'Subnet'  => { 'Width' => 17 },
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          'Netmask' => { 'Width' => 17 },
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        })
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    ret = []
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    Rex::Socket::SwitchBoard.each { |route|
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      if (route.comm.kind_of?(Msf::Session))
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        gw = "Session #{route.comm.sid}"
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      else
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        gw = route.comm.name.split(/::/)[-1]
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      end
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      tbl << [ route.subnet, route.netmask, gw ]
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    }
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      print tbl.to_s
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  else
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    print_status "No routes have been added yet"
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  end
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  raise Rex::Script::Completed
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end
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# Yet another IP validator. I'm sure there's some Rex
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# function that can just do this.
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def check_ip(ip=nil)
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  return false if(ip.nil? || ip.strip.empty?)
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  begin
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    rw = Rex::Socket::RangeWalker.new(ip.strip)
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    (rw.valid? && rw.length == 1) ? true : false
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  rescue
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    false
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  end
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end
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# Adds a route to the framework instance
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def add_route(opts={})
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  subnet = opts[:subnet]
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  netmask = opts[:netmask] || "255.255.255.0" # Default class C
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  Rex::Socket::SwitchBoard.add_route(subnet, netmask, session)
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end
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# Removes a route to the framework instance
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def delete_route(opts={})
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  subnet = opts[:subnet]
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  netmask = opts[:netmask] || "255.255.255.0" # Default class C
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  Rex::Socket::SwitchBoard.remove_route(subnet, netmask, session)
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end
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# Validates the command options
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def validate_cmd(subnet=nil,netmask=nil)
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  if subnet.nil?
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    print_error "Missing -s (subnet) option"
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    return false
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  end
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  unless(check_ip(subnet))
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    print_error "Subnet invalid (must be IPv4)"
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    usage
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    return false
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  end
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  if(netmask and !(Rex::Socket.addr_atoc(netmask)))
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    print_error "Netmask invalid (must define contiguous IP addressing)"
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    usage
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    return false
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  end
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  if(netmask and !check_ip(netmask))
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    print_error "Netmask invalid"
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    return usage
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  end
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  true
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end
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if print_only
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  print_routes()
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  raise Rex::Script::Completed
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end
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if remove_all_routes
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  delete_all_routes()
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  raise Rex::Script::Completed
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end
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raise Rex::Script::Completed unless validate_cmd(subnet,netmask)
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if remove_route
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  print_status("Deleting route to %s/%s..." % [subnet,netmask])
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  route_result = delete_route(:subnet => subnet, :netmask => netmask)
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else
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  print_status("Adding a route to %s/%s..." % [subnet,netmask])
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  route_result = add_route(:subnet => subnet, :netmask => netmask)
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end
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if route_result
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  print_good "%s route to %s/%s via %s" % [
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    (remove_route ? "Deleted" : "Added"),
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    subnet,netmask,client.sock.peerhost
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  ]
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else
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  print_error "Could not %s route" % [(remove_route ? "delete" : "add")]
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end
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if Rex::Socket::SwitchBoard.routes.size > 0
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  print_status "Use the -p option to list all active routes"
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end
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