def _build_stack(self):
"""
Create all the layer and link them together. Of
course other layer could be added if implemented.
"""
#Layer 2
self.eth = EthernetProtocol(self.interface)
#Layer2.5
self.mpls = MPLSProtocol()
self.eth.register_layer(self.mpls)
#Layer 3
ip = IPProtocol()
self.eth.register_layer(ip)
#register mpls layer
self.mpls.register_upper_layer(ip.name, ip)
print self.mpls.name
ip.register_lower_layer(self.mpls.name, self.mpls)
arp = ARPProtocol(self.interface)
self.eth.register_layer(arp)
#Layer 4
self.tcp = TCPProtocol()
ip.register_layer(self.tcp)
self.udp = UDPProtocol()
ip.register_layer(self.udp)
#Layer 7
self.dns = DNSProtocol(self.interface)
self.udp.register_layer(self.dns)
