Class: BetterCap::Proxy::TCP::Proxy

Inherits:
Object
  • Object
show all
Defined in:
lib/bettercap/proxy/tcp/proxy.rb

Overview

Transparent TCP proxy class.

Instance Method Summary collapse

Constructor Details

#initialize(address, port, up_address, up_port) ⇒ Proxy

Initialize the TCP proxy with given arguments.



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# File 'lib/bettercap/proxy/tcp/proxy.rb', line 38

def initialize( address, port, up_address, up_port )
  @address          = address
  @port             = port
  @upstream_address = up_address
  @upstream_port    = up_port
  @ctx              = BetterCap::Context.get
  @worker           = nil
end

Instance Method Details

#start ⇒ Object

Start the proxy.



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# File 'lib/bettercap/proxy/tcp/proxy.rb', line 48

def start
  Logger.info "[#{'TCP PROXY'.green}] Starting on #{@address}:#{@port} ( -> #{@upstream_address}:#{@upstream_port} ) ..."
  @worker = Thread.new &method(:worker)
  # If the upstream server is in this network, we need to make sure that its MAC
  # address is discovered and put in the ARP cache before we even start the proxy,
  # otherwise internal connections won't be spoofed and the proxy will be useless
  # until some random event will fill the ARP cache for the server.
  if @ctx.ifconfig[:ip4_obj].include?( @upstream_address )
    Logger.debug "[#{'TCP PROXY'.green}] Sending probe to upstream server address ..."
    BetterCap::Network.get_hw_address( @ctx, @upstream_address )
    # wait for the system to acknowledge the ARP cache changes.
    sleep( 1 )
  end
end

#stop ⇒ Object

Stop the proxy.



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# File 'lib/bettercap/proxy/tcp/proxy.rb', line 64

def stop
  Logger.info "Stopping TCP proxy ..."
  ::Proxy.stop
  @worker.join
end