Class: Rex::Post::Meterpreter::Ui::Console::CommandDispatcher::NetworkPug

Inherits:
Object
  • Object
show all
Includes:
Rex::Post::Meterpreter::Ui::Console::CommandDispatcher
Defined in:
lib/rex/post/meterpreter/ui/console/command_dispatcher/networkpug.rb

Overview

Rex::Ui::Text::IrbShell.new(binding).run

Constant Summary collapse

Klass = 
Console::CommandDispatcher::NetworkPug
@@options = 
Rex::Parser::Arguments.new(
	"-i" => [ true, "Interface on remote machine to listen on" ],
	"-f" => [ true, "Additional pcap filtering mechanism" ],
	"-v" => [ false, "Virtual NIC (packets only for your TAP dev locally)" ]
)

Instance Attribute Summary collapse

Attributes included from Ui::Text::DispatcherShell::CommandDispatcher

#shell, #tab_complete_items

Instance Method Summary collapse

Methods included from Rex::Post::Meterpreter::Ui::Console::CommandDispatcher

check_hash, #client, #log_error, #msf_loaded?, set_hash

Methods included from Ui::Text::DispatcherShell::CommandDispatcher

#cmd_help, #cmd_help_tabs, #print, #print_error, #print_good, #print_line, #print_status, #tab_complete_filenames, #update_prompt

Constructor Details

#initialize(shell) ⇒ NetworkPug

Returns a new instance of NetworkPug.



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# File 'lib/rex/post/meterpreter/ui/console/command_dispatcher/networkpug.rb', line 22

def initialize(shell)
	@thread_stuff = nil
	@tapdev = nil
	@channel = nil

	super
end

Instance Attribute Details

#channel ⇒ Object

Returns the value of attribute channel.



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# File 'lib/rex/post/meterpreter/ui/console/command_dispatcher/networkpug.rb', line 32

def channel
  @channel
end

#tapdev ⇒ Object

Returns the value of attribute tapdev.



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# File 'lib/rex/post/meterpreter/ui/console/command_dispatcher/networkpug.rb', line 31

def tapdev
  @tapdev
end

#thread_stuff ⇒ Object

Returns the value of attribute thread_stuff.



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# File 'lib/rex/post/meterpreter/ui/console/command_dispatcher/networkpug.rb', line 30

def thread_stuff
  @thread_stuff
end

Instance Method Details

#cmd_networkpug_start(*args) ⇒ Object 



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# File 'lib/rex/post/meterpreter/ui/console/command_dispatcher/networkpug.rb', line 117

def cmd_networkpug_start(*args)
	# PKS - I suck at ruby ;\

	virtual_nic = false
	filter = nil
	interface = nil

	if(args.length == 0)
		args.unshift("-h")
	end

	@@options.parse(args) { |opt, idx, val|
		# print_line("before: #{opt} #{idx} #{val} || virtual nic: #{virtual_nic}, filter: #{filter}, interface: #{interface}")
		case opt
			when "-v"
				virtual_nic = true

			when "-f"
				filter = val

			when "-i"
				interface = val

			when "-h"
				print_error("Usage: networkpug_start -i interface [options]")
				print_error("")
				print_error(@@options.usage)
		end
		# print_line("after: #{opt} #{idx} #{val} || virtual nic: #{virtual_nic}, filter: #{filter}, interface: #{interface}")

	}

	if (interface == nil)
		print_error("Usage: networkpug_start -i interface [options]")
		print_error("")
		print_error(@@options.usage)
		return
	end

	@tapdev, tapname, mac = setup_tapdev

	if(@tapdev == nil)
		print_status("Failed to create tapdev")
		return
	end

	# PKS, we should implement multiple filter strings and let the
	# remote host build it properly.
	# not (our conn) and (virtual nic filter) and (custom filter)
	# print_line("before virtual, filter is #{filter}")

	if(filter == nil and virtual_nic == true)
		filter = "ether host #{mac}"
	elsif(filter != nil and virtual_nic == true)
		filter += " and ether host #{mac}"
		#print_line("Adjusted filter is #{filter}")
	end

	print_line("#{tapname} created with a hwaddr of #{mac}, ctrl-c when done")

	response, @channel = client.networkpug.networkpug_start(interface, filter)

	if(@channel)
		@thread_stuff = Rex::ThreadFactory.spawn("MeterpreterNetworkPUGReceiver", false) {
			proxy_packets()
		}

		print_line("Packet slinger for #{interface} has a thread structure of #{@thread_stuff}")
	end

	return true
end

#cmd_networkpug_stop(*args) ⇒ Object 



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# File 'lib/rex/post/meterpreter/ui/console/command_dispatcher/networkpug.rb', line 190

def cmd_networkpug_stop(*args)
	interface = args[0]
	if (interface == nil)
		print_error("Usage: networkpug_stop [interface]")
		return
	end		

	client.networkpug.networkpug_stop(interface)

	#print_line("client.networkpug.networkpug_stop returned")

	if(@thread_stuff)
		# print_line("killing thread")
		@thread_stuff.kill

		#print_line("joining thread")
		#@thread_stuff.join
		# meterpreter dies if i try to join.. not sure why.

		@thread_stuff = nil
		
		#print_line("closing tapdev")
		@tapdev.close

		#print_line("closing channel")
		#@channel.close
	end

	print_status("Packet slinging stopped on #{interface}")
	return true
end

#commands ⇒ Object

List of supported commands.



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# File 'lib/rex/post/meterpreter/ui/console/command_dispatcher/networkpug.rb', line 38

def commands
	{
		"networkpug_start" => "Start slinging packets between hosts",
		"networkpug_stop"  => "Stop slinging packets between hosts",
	}
end

#name ⇒ Object 



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# File 'lib/rex/post/meterpreter/ui/console/command_dispatcher/networkpug.rb', line 222

def name
	"NetworkPug"
end

#proxy_packets ⇒ Object 



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# File 'lib/rex/post/meterpreter/ui/console/command_dispatcher/networkpug.rb', line 76

def proxy_packets()
	while 1
		# Ghetto :\

		sd = Rex::ThreadSafe.select([ @channel.lsock, @tapdev ], nil, nil)

		sd[0].each { |s|
			if(s == @channel.lsock)	# Packet from remote host to local TAP dev
				len = @channel.lsock.read(2)
				len = len.unpack('n')[0]

				#print_line("Got #{len} bytes from remote host's network")
				
				if(len > 1514 or len == 0)
					@tapdev.close()
					print_line("length is invalid .. #{len} ?, de-synchronized ? ")
				end

				packet = @channel.lsock.read(len)

				print_line("packet from remote host:\n" + Rex::Text.hexify(packet))

				@tapdev.syswrite(packet)

			elsif(s == @tapdev)
				# Packet from tapdev to remote host network

				packet = @tapdev.sysread(1514)

				print_line("packet to remote host:\n" + Rex::Text.hexify(packet))

				@channel.write(packet)
			end
		} if(sd)

		if(not sd)
			print_line("hmmm. ")
		end
	end
end

#setup_tapdev ⇒ Object 



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# File 'lib/rex/post/meterpreter/ui/console/command_dispatcher/networkpug.rb', line 45

def setup_tapdev
	# XXX, look at how to use windows equivilient and include

	tapdev = ::File.open("/dev/net/tun", "wb+")

	0.upto(16) { |idx|
		name = "npug#{idx}"

		ifreq = [ name, 0x1000 | 0x02, "" ].pack("a16va14")

		begin
			tapdev.ioctl(0x400454ca, ifreq)		# is there a better way than hex constant
		rescue Errno::EBUSY
			next
		end
		
		ifreq = [ name ].pack("a32")

		tapdev.ioctl(0x8927, ifreq)

		# print_line(Rex::Text.hexify(ifreq))

		mac = sprintf("%02x:%02x:%02x:%02x:%02x:%02x", ifreq[18], ifreq[19], ifreq[20], ifreq[21], ifreq[22], ifreq[23])

		return tapdev, name, mac
	}
	
	tapdev.close()
	return nil, nil, nil
end