#!/bin/bash

# Connects nodes in a network resembling an s-channel feynmann diagram.

# 1      5
#  \    /
#   3--4
#  /    \
# 2      6

# Bandwidth constraints are applied to 4<->5 and 4<->6.
# The idea is to make sure that bottlenecks on one link don't affect the other.

ip netns add node1
ip netns add node2
ip netns add node3
ip netns add node4
ip netns add node5
ip netns add node6

ip link add veth13 type veth peer name veth31
ip link set veth13 netns node1 up
ip link set veth31 netns node3 up

ip link add veth23 type veth peer name veth32
ip link set veth23 netns node2 up
ip link set veth32 netns node3 up

ip link add veth34 type veth peer name veth43
ip link set veth34 netns node3 up
ip link set veth43 netns node4 up

ip link add veth45 type veth peer name veth54
ip link set veth45 netns node4 up
ip link set veth54 netns node5 up

ip link add veth46 type veth peer name veth64
ip link set veth46 netns node4 up
ip link set veth64 netns node6 up

ip netns exec node4 tc qdisc add dev veth45 root tbf rate 100mbit burst 8192 latency 1ms
ip netns exec node5 tc qdisc add dev veth54 root tbf rate 100mbit burst 8192 latency 1ms

ip netns exec node4 tc qdisc add dev veth46 root tbf rate 10mbit burst 8192 latency 1ms
ip netns exec node6 tc qdisc add dev veth64 root tbf rate 10mbit burst 8192 latency 1ms

ip netns exec node1 ./run --autoconf --pprof &> /dev/null &
ip netns exec node2 ./run --autoconf --pprof &> /dev/null &
ip netns exec node3 ./run --autoconf --pprof &> /dev/null &
ip netns exec node4 ./run --autoconf --pprof &> /dev/null &
ip netns exec node5 ./run --autoconf --pprof &> /dev/null &
ip netns exec node6 ./run --autoconf --pprof &> /dev/null &

echo "Started, to continue you should (possibly w/ sudo):"
echo "kill" $(jobs -p)
wait

ip netns delete node1
ip netns delete node2
ip netns delete node3
ip netns delete node4
ip netns delete node5
ip netns delete node6

ip link delete veth13
ip link delete veth23
ip link delete veth34
ip link delete veth45
ip link delete veth46