Method: Rex::Socket.source_address

Defined in:
lib/rex/socket.rb

.source_address(dest = '8.8.8.8', comm = ::Rex::Socket::Comm::Local) ⇒ Object

This method does NOT send any traffic to the destination, instead, it uses a “bound” UDP socket to determine what source address we would use to communicate with the specified destination. The destination defaults to Google’s DNS server to make the standard behavior determine which IP we would use to communicate with the internet.



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# File 'lib/rex/socket.rb', line 588

def self.source_address(dest='8.8.8.8', comm = ::Rex::Socket::Comm::Local)
  begin
    s = self.create_udp(
      'PeerHost' => dest,
      'PeerPort' => 31337,
      'Comm'     => comm
    )
    r = s.getsockname[1]
    s.close

    # Trim off the trailing interface ID for link-local IPv6
    return r.split('%').first
  rescue ::Exception
    return '127.0.0.1'
  end
end