def _handle_PacketIn(self, event):
"""
Handle arrival of new flow.
Install routes in both directions using the shortest path metric.
"""
try:
if self.done:
return
self.net.refresh_network()
packet = event.parsed
if packet.find('tcp'):
ip = packet.next
tcp = ip.next
if str(ip.srcip) != '0.0.0.0':
log.info("packetin {1}:{3} to {2}:{4} at {0}".format(
time.clock(), str(ip.srcip), str(ip.dstip),
tcp.srcport, tcp.dstport))
there = Flow(6, str(ip.srcip), str(ip.dstip),
tcp.srcport, tcp.dstport)
back = Flow(6, str(ip.dstip), str(ip.srcip),
tcp.dstport, tcp.srcport)
rules = shortest_path.objective(self.net.graph,
[(back,0), (there,0)])
self._install_rule_list(rules)
except Exception as e:
print str(e)
def test_pentagon_graph_two_flows(self):
G = pentagon_graph()
f1 = Flow(6, '10.0.0.1', '10.0.0.2', 5001, 5002)
f2 = Flow(6, '10.0.0.2', '10.0.0.1', 5003, 5004)
expected = {
f1: [Hop(1,2), Hop(2,2), Hop(5,1)],
f2: [Hop(5,2), Hop(2,1), Hop(1,1)]
}
assert objective(G, [(f1,1e6), (f2,1e6)]) == expected
def _handle_PacketIn(self, event):
self.net.refresh_network()
packet = event.parsed
if packet.find('tcp'):
ip = packet.next
tcp = ip.next
if str(ip.srcip) != '0.0.0.0':
log.info("legit packetin {1}:{3} to {2}:{4} at {0}".format(
time.clock(), str(ip.srcip), str(ip.dstip),
tcp.srcport, tcp.dstport))
there = Flow(6, str(ip.srcip), str(ip.dstip),
tcp.srcport, tcp.dstport)
back = Flow(6, str(ip.dstip), str(ip.srcip),
tcp.dstport, tcp.srcport)
rules = shortest_path.objective(self.net.graph,
[(back,0), (there,0)])
#log.info("got rules {0}".format(rules))
self._install_rule_list(rules)
def test_valid_graph_empty_flows(self):
assert objective(pentagon_graph(), []) == {}
def test_empty_graph_one_flow(self):
f = Flow(nw_proto=6, nw_src='10.0.0.1', nw_dst='10.0.0.2',
tp_src=5001, tp_dst=5002)
assert objective(nx.Graph(), [(f,1e6)]) == {}
def test_empty_graph_empty_flows(self):
assert objective(nx.Graph(), []) == {}