def run(args):
topo = GridTopo(args.rows, args.cols)
net = Mininet(topo, host=NdnHost, link=TCLink, controller=None)
topo.assignIps(net)
net.start()
ndndumps = []
if not args.no_ndndump:
print 'Start ndndump tracers.'
ndndumps = [ NdnDump(link) for link in net.links ]
for ndndump in ndndumps:
ndndump.start()
print 'Start forwarding.'
fws = [ host.getFw() for host in net.hosts ]
for fw in fws:
fw.start()
time.sleep(5)
print 'Start routing.'
routs = [ host.getRout() for host in net.hosts ]
for rout in routs:
rout.advertise('/%s' % rout.host.name)
rout.start()
convergeTime = Routing.waitForConverge(net)
if convergeTime is False:
print 'Routing is not converged.'
net.stop()
exit(1)
print 'Routing is converged in %d seconds at %d.' % (convergeTime, time.time())
pingServers = []
pingClients = []
if not args.no_ping:
print 'Start ping servers and clients.'
for host in net.hosts:
pingServer = NdnPingServer(host, '/%s' % host.name)
pingServer.start()
pingServers.append(pingServer)
for otherHost in net.hosts:
pingClient = NdnPing(host, '/%s' % otherHost.name)
pingClient.start('/var/log/ndn/ndnping_%s.log' % otherHost.name)
pingClients.append(pingClient)
sched = scheduler(time.time, time.sleep)
schedLinkFails(sched, net, args.linkFails)
sched.enter(args.duration, 0, lambda:0, ())
sched.run()
if not args.no_ping:
print 'Stop ping clients.'
for pingClient in pingClients:
pingClient.stop()
time.sleep(1)
net.stop()
def schedLinkFails(sched, net, linkFails):
def fail(intf):
intf.config(loss=100)
def recover(intf):
# loss=0 alone would be ignored, so we add bw=1000
intf.config(bw=1000, loss=0)
def do(t, h1, h2, act):
print '%d %s %s-%s' % (t, act.func_name, h1.name, h2.name)
connections = h1.connectionsTo(h2)
for (intf1, intf2) in connections:
act(intf1)
act(intf2)
for (x1, y1, x2, y2, t1, t2) in linkFails:
h1 = net.get(GridTopo.makeHostName(x1, y1))
h2 = net.get(GridTopo.makeHostName(x2, y2))
sched.enter(t1, 0, do, (t1, h1, h2, fail))
sched.enter(t2, 0, do, (t2, h1, h2, recover))
