def test_it_should_send_packets_to_a_link(self):
l = Link('A')
i = Interface(link=l)
i.send("This is a packet.")
self.assertEqual(1, len(l.forwarded()))
self.assertEqual("This is a packet.", l.forwarded()[0])
def test_it_should_accept_packets_from_a_link(self):
l = Link('A')
i = Interface(link=l)
j = Interface(link=l)
i.send("This is a packet.")
self.assertEqual(1, len(j.received()))
self.assertEqual("This is a packet.", j.received()[0])
def test_it_should_encapsulate_packets_with_layer_2_frames_on_send(self):
l = Link('A')
i = Interface(link=l)
i.send(IPv6())
self.assertEqual(1, len(l.forwarded()))
self.assertTrue(l.forwarded()[0].haslayer(Ether))
self.assertTrue(l.forwarded()[0].haslayer(IPv6))
def test_it_should_set_the_source_and_destination_mac_addresses_to_defaults_for_ethernet_link_layer(self):
l = Link('A')
i = Interface(link=l)
i.send(IPv6())
self.assertEqual(1, len(l.forwarded()))
self.assertTrue(l.forwarded()[0].haslayer(Ether))
self.assertEqual("00:00:00:00:00:00", l.forwarded()[0].getlayer(Ether).src)
self.assertEqual("ff:ff:ff:ff:ff:ff", l.forwarded()[0].getlayer(Ether).dst)
def test_it_should_overwrite_the_destination_mac_of_an_ethernet_frame(self):
l = Link('A')
i = Interface(link=l)
j = MockInterface('if0', '00:b0:d0:86:bb:f7')
k = TargetInterface(link_addr="00:b0:d0:bb:cc:ff")
t = Tap(l, j, k)
i.send(IPv6())
self.assertEqual(1, len(j.sent))
self.assertTrue(j.sent[0].haslayer(Ether))
self.assertTrue(j.sent[0].haslayer(IPv6))
self.assertEqual("00:b0:d0:bb:cc:ff", j.sent[0].getlayer(Ether).dst)
def test_it_should_invoke_on_send_callbacks(self):
l = Link('A')
i = Interface(link=l)
self.called = False
self.packet = None
def c(p, iface):
self.called = True
self.packet = p
i.on_send(c)
i.send("This is a packet.")
self.assertTrue(self.called)
self.assertEqual("This is a packet.", self.packet)
