experiments: allow sleep after a host is instantiated; add ns3 sequencer network

experiments/modes/experiments.py

@@ -104,6 +104,9 @@ class Experiment(object):
                 if host.wait:
                     wait_hosts.append(sc)
 
+                if host.sleep > 0:
+                    await asyncio.sleep(host.sleep)
+
             if verbose:
                 print('%s: waiting for hosts to terminate' % self.name)
             for sc in wait_hosts:

experiments/modes/simulators.py

@@ -18,6 +18,7 @@ class HostSim(Simulator):
     disk_image = 'base'
     name = ''
     wait = False
+    sleep = 0
 
     def __init__(self):
         self.nics = []
@@ -189,6 +190,22 @@ class NS3DumbbellNet(NetSim):
         return cmd
 
 
+class NS3SequencerNet(NetSim):
+    def run_cmd(self, env):
+        ports = ''
+        for n in self.nics:
+            if 'client' in n.name:
+                ports += '--ClientPort=' + env.nic_eth_path(n) + ' '
+            elif 'replica' in n.name:
+                ports += '--ServerPort=' + env.nic_eth_path(n) + ' '
+            elif 'sequencer' in n.name:
+                ports += '--EndhostSequencerPort=' + env.nic_eth_path(n) + ' '
+            else:
+                raise Exception('Wrong NIC type')
+        cmd = env.repodir + '/ns-3' + '/cosim-run.sh sequencer sequencer-single-switch-example ' + ports + ' ' + self.opt
+        return cmd
+
+
 def create_basic_hosts(e, num, name_prefix, net, nic_class, host_class,
         nc_class, app_class, ip_start=1):
     hosts = []