experiments: add ns3 bridge experiment

experiments/Makefile

@@ -12,6 +12,7 @@ EXPERIMENTS := \
     qemu-corundum-verilator-pair \
     gem5-kvm-corundum-bm-pair \
     gem5-timing-corundum-verilator-pair \
+    qemu-ns3-bridge-pair \
 
 BUILDDIR := build
 OUTDIR := out

experiments/common-functions.sh

@@ -22,6 +22,11 @@ if [ ! -d "$GEM5_BASE" ] ; then
         "(local-config.sh)"
     exit 1
 fi
+if [ ! -d "$NS3_BASE" ] ; then
+    echo "\$NS3_BASE should be set to the absolute path to a built ns3 repo"\
+        "(local-config.sh)"
+    exit 1
+fi
 
 QEMU_IMAGE=$EHSIM_BASE/images/output-ubuntu1804/ubuntu1804
 QEMU_KERNEL=$EHSIM_BASE/images/bzImage
@@ -125,6 +130,22 @@ run_wire() {
     return $pid
 }
 
+# Args:
+#   - Instance name
+#   - Port names
+run_ns3_bridge() {
+    ports=""
+    for p in $2; do
+        epath="`readlink -f $OUTDIR/eth.$p`"
+        ports="$ports --CosimPort=$epath"
+    done
+    $NS3_BASE/cosim-run.sh cosim-bridge-example \
+        $ports &>$OUTDIR/ns3_bridge.$1.log &
+    pid=$!
+    ALL_PIDS="$ALL_PIDS $pid"
+    return $pid
+}
+
 cleanup() {
     echo Cleaning up
     for p in $ALL_PIDS ; do

experiments/experiments/qemu-ns3-bridge-pair.sh

+#!/bin/bash
+
+source common-functions.sh
+
+init_out qemu-ns3-bridge-pair
+run_corundum_bm a
+run_corundum_bm b
+sleep 0.5
+run_ns3_bridge ab "a b"
+run_qemu a a build/qemu-pair-server.tar
+run_qemu b b build/qemu-pair-client.tar
+client_pid=$!
+wait $client_pid
+cleanup