Porting PicoTCP WIP

kernel/picotcp/test/python/fairness_bottleneck.py

@@ -0,0 +1,47 @@
+#!/usr/bin/python
+# fairness.py
+# A complex test for butterly-like topology,
+# using 3 TCP connections and 3 ping flows.
+#
+# Bottleneck of 4 Mbit/300 ms overall delay is added.
+#
+# s1---.                 .---r1
+# s2----\               /
+# s3-----\__.R1---R2.__/__.--r2
+# s4-----/             \
+# s5----/               \_.--r3
+# s6---^
+#
+
+from  topology import *
+
+T = Topology()
+net1 = Network(T)
+net2 = Network(T)
+net3 = Network(T)
+
+router1 = Host(T, net1, net2, delay2="150", bw2="20M")
+router2 = Host(T, net2, net3)
+
+send1 = Host(T, net1, args="tcpbench:t:172.16.3.2:")
+send2 = Host(T, net1, args="tcpbench:t:172.16.3.3:")
+send3 = Host(T, net1, args="tcpbench:t:172.16.3.4:")
+
+send4 = Host(T, net1, args="ping:172.16.3.2:")
+send5 = Host(T, net1, args="ping:172.16.3.3:")
+send6 = Host(T, net1, args="ping:172.16.3.4:")
+
+
+recv1 = Host(T, net3, args="tcpbench:r:")
+recv2 = Host(T, net3, args="tcpbench:r:")
+recv3 = Host(T, net3, args="tcpbench:r:")
+
+
+sleep(1)
+start(T)
+
+wait(send1)
+wait(send2)
+wait(send3)
+
+cleanup()