def test_run_ping_routing(self):
n1 = nemu.Node()
n2 = nemu.Node()
n3 = nemu.Node()
i1 = n1.add_if()
i2a = n2.add_if()
i2b = n2.add_if()
i3 = n3.add_if()
i1.up = i2a.up = i2b.up = i3.up = True
l1 = nemu.Switch()
l2 = nemu.Switch()
l1.connect(i1)
l1.connect(i2a)
l2.connect(i2b)
l2.connect(i3)
l1.up = l2.up = True
i1.add_v4_address('10.0.0.1', 24)
i2a.add_v4_address('10.0.0.2', 24)
i2b.add_v4_address('10.0.1.1', 24)
i3.add_v4_address('10.0.1.2', 24)
n1.add_route(prefix='10.0.1.0', prefix_len=24, nexthop='10.0.0.2')
n3.add_route(prefix='10.0.0.0', prefix_len=24, nexthop='10.0.1.1')
null = file('/dev/null', 'wb')
a1 = n1.Popen(['ping', '-qc1', '10.0.1.2'], stdout=null)
a2 = n3.Popen(['ping', '-qc1', '10.0.0.1'], stdout=null)
self.assertEquals(a1.wait(), 0)
self.assertEquals(a2.wait(), 0)
def test_run_ping_tap_routing(self):
"""This test simulates a point to point connection between two hosts
using two tap devices, and normal connections with other two, to use
routing."""
n1 = nemu.Node()
n2 = nemu.Node()
n3 = nemu.Node()
n4 = nemu.Node()
i1 = n1.add_if()
i2 = n2.add_if()
tap1 = n2.add_tap()
tap2 = n3.add_tap()
i3 = n3.add_if()
i4 = n4.add_if()
i1.up = i2.up = tap1.up = tap2.up = i3.up = i4.up = True
l1 = nemu.Switch()
l2 = nemu.Switch()
l1.connect(i1)
l1.connect(i2)
l2.connect(i3)
l2.connect(i4)
l1.up = l2.up = True
i1.add_v4_address('10.0.0.1', 24)
i2.add_v4_address('10.0.0.2', 24)
tap1.add_v4_address('10.0.1.1', 24)
tap2.add_v4_address('10.0.1.2', 24)
i3.add_v4_address('10.0.2.1', 24)
i4.add_v4_address('10.0.2.2', 24)
n1.add_route(prefix='10.0.1.0', prefix_len=24, nexthop='10.0.0.2')
n1.add_route(prefix='10.0.2.0', prefix_len=24, nexthop='10.0.0.2')
n2.add_route(prefix='10.0.2.0', prefix_len=24, nexthop='10.0.1.2')
n3.add_route(prefix='10.0.0.0', prefix_len=24, nexthop='10.0.1.1')
n4.add_route(prefix='10.0.1.0', prefix_len=24, nexthop='10.0.2.1')
n4.add_route(prefix='10.0.0.0', prefix_len=24, nexthop='10.0.2.1')
null = file('/dev/null', 'wb')
a = n1.Popen(['ping', '-qc1', '10.0.2.2'], stdout=null)
self._forward_packets(a, tap1, tap2)
self.assertEquals(a.wait(), 0)
def create_stuff():
a = nemu.Node()
b = nemu.Node()
ifa = a.add_if()
ifb = b.add_if()
switch = nemu.Switch()
switch.connect(ifa)
switch.connect(ifb)
def setUp(self):
n1 = nemu.Node()
n2 = nemu.Node()
i1 = n1.add_if()
i2 = n2.add_if()
l = nemu.Switch()
l.connect(i1)
l.connect(i2)
self.stuff = (n1, n2, i1, i2, l)
def create_topo(n, p2p, delay, jitter, bw):
nodes = []
interfaces = []
links = []
for i in range(n):
nodes.append(nemu.Node())
if p2p:
interfaces = [[None]]
for i in range(n - 1):
a, b = nemu.P2PInterface.create_pair(nodes[i], nodes[i + 1])
interfaces[i].append(a)
interfaces.append([])
interfaces[i + 1] = [b]
interfaces[n - 1].append(None)
else:
for i in range(n):
if i > 0:
left = nodes[i].add_if()
else:
left = None
if i < n - 1:
right = nodes[i].add_if()
else:
right = None
interfaces.append((left, right))
for i in range(n - 1):
links = nemu.Switch(bandwidth=bw, delay=delay, delay_jitter=jitter)
links.up = True
links.connect(interfaces[i][1])
links.connect(interfaces[i + 1][0])
links.append(links)
for i in range(n):
for j in (0, 1):
if interfaces[i][j]:
interfaces[i][j].up = True
ip = ip2dec("10.0.0.1")
for i in range(n - 1):
interfaces[i][1].add_v4_address(dec2ip(ip), 30)
interfaces[i + 1][0].add_v4_address(dec2ip(ip + 1), 30)
ip += 4
ipbase = ip2dec("10.0.0.0")
lastnet = dec2ip(ipbase + 4 * (n - 2))
for i in range(n - 2):
nodes[i].add_route(prefix=lastnet,
prefix_len=30,
nexthop=dec2ip(ipbase + 4 * i + 2))
nodes[n - 1 - i].add_route(prefix="10.0.0.0",
prefix_len=30,
nexthop=dec2ip(ipbase + (n - 2 - i) * 4 +
1))
return nodes, interfaces, links
def test_run_ping_node_if(self):
n1 = nemu.Node()
n2 = nemu.Node()
i1 = n1.add_if()
i2 = n2.add_if()
i1.up = i2.up = True
l = nemu.Switch()
l.connect(i1)
l.connect(i2)
l.up = True
i1.add_v4_address('10.0.0.1', 24)
i2.add_v4_address('10.0.0.2', 24)
null = file('/dev/null', 'wb')
a1 = n1.Popen(['ping', '-qc1', '10.0.0.2'], stdout=null)
a2 = n2.Popen(['ping', '-qc1', '10.0.0.1'], stdout=null)
self.assertEquals(a1.wait(), 0)
self.assertEquals(a2.wait(), 0)
SIZE = 5
for i in range(SIZE):
node.append(nemu.Node(forward_X11=X))
next_pair = (i, i + 1)
prev_pair = (i, i - 1)
if i < SIZE - 1:
iface[(i, i + 1)] = nemu.NodeInterface(node[i])
iface[(i, i + 1)].up = True
iface[(i, i + 1)].add_v4_address(address='10.0.%d.1' % i,
prefix_len=24)
if i > 0:
iface[(i, i - 1)] = nemu.NodeInterface(node[i])
iface[(i, i - 1)].up = True
iface[(i, i - 1)].add_v4_address(address='10.0.%d.2' % (i - 1),
prefix_len=24)
switch.append(nemu.Switch())
switch[-1].connect(iface[(i, i - 1)])
switch[-1].connect(iface[(i - 1, i)])
switch[-1].up = True
# Configure routing
for j in range(SIZE - 1):
if j in (i, i - 1):
continue
if j < i:
node[i].add_route(prefix='10.0.%d.0' % j,
prefix_len=24,
nexthop='10.0.%d.1' % (i - 1))
else:
node[i].add_route(prefix='10.0.%d.0' % j,
prefix_len=24,
nexthop='10.0.%d.2' % i)
# each Node is a netns
node0 = nemu.Node(forward_X11=X)
node1 = nemu.Node(forward_X11=X)
node2 = nemu.Node(forward_X11=X)
print "Nodes started with pids: %s" % str((node0.pid, node1.pid, node2.pid))
# interface object maps to a veth pair with one end in a netns
if0 = nemu.NodeInterface(node0)
if1a = nemu.NodeInterface(node1)
# Between node1 and node2, we use a P2P interface
(if1b, if2) = nemu.P2PInterface.create_pair(node1, node2)
switch0 = nemu.Switch(
bandwidth=100 * 1024 * 1024,
delay=0.1, # 100 ms
delay_jitter=0.01, # 10ms
delay_correlation=0.25, # 25% correlation
loss=0.005)
# connect the interfaces
switch0.connect(if0)
switch0.connect(if1a)
# bring the interfaces up
switch0.up = if0.up = if1a.up = if1b.up = if2.up = True
# Add IP addresses
if0.add_v4_address(address='10.0.0.1', prefix_len=24)
if1a.add_v4_address(address='10.0.0.2', prefix_len=24)
if1b.add_v4_address(address='10.0.1.1', prefix_len=24)
if2.add_v4_address(address='10.0.1.2', prefix_len=24)
