def testMinus(self):
h1 = headerspace(1)
h1.add_hs(wildcard_create_from_string("1001xxxx"))
h2 = headerspace(1)
h2.add_hs(wildcard_create_from_string("100xx000"))
h1.minus(h2)
self.assertEqual(h1.count(),3)
def testContainedIn(self):
h1 = headerspace(1)
h1.add_hs(wildcard_create_from_string("1001xxxx"))
h1.diff_hs(wildcard_create_from_string("1xxxx111"))
h2 = headerspace(1)
h2.add_hs(wildcard_create_from_string("1001xxxx"))
h2.add_hs(wildcard_create_from_string("11xxxx11"))
h2.diff_hs(wildcard_create_from_string("100xxx00"))
h2.diff_hs(wildcard_create_from_string("1xxxx111"))
self.assertTrue(h1.is_contained_in(h2))
self.assertFalse(h2.is_contained_in(h1))
def testIntersect2(self):
'''
Test intersect with a headerspace
'''
h = headerspace(1)
h.add_hs(wildcard_create_from_string("1001xxxx"))
h.add_hs(wildcard_create_from_string("11xxxx11"))
h.diff_hs(wildcard_create_from_string("100xx000"))
h.diff_hs(wildcard_create_from_string("1xxx1x11"))
other = headerspace(1)
other.add_hs(wildcard_create_from_string("10xxxxx1"))
other.diff_hs(wildcard_create_from_string("10010xxx"))
h.intersect(other)
self.assertEqual(other.count(),1)
self.assertEqual(other.count_diff(),1)
self.assertEqual(h.count(),1)
self.assertEqual(h.count_diff(),2)
def testComplement(self):
'''
Test if complement correctly handles diffs
'''
h = headerspace(1)
h.add_hs(wildcard_create_from_string("1001xxxx"))
h.diff_hs(wildcard_create_from_string("100xx000"))
h.complement()
self.assertEqual(h.count(),5)
def testCreate(self):
'''
Test if creating a headerspace object creates correct number of
bytearrays inside.
'''
h = headerspace(1)
h.add_hs(wildcard_create_from_string("1001xxxx"))
h.add_hs(wildcard_create_from_string("11xxxx11"))
self.assertEqual(h.count(),2)
def testSelfDiff(self):
h = headerspace(1)
h.add_hs(wildcard_create_from_string("1001xxxx"))
h.add_hs(wildcard_create_from_string("11xxxx11"))
h.diff_hs(wildcard_create_from_string("100xxx00"))
h.diff_hs(wildcard_create_from_string("1xxxx111"))
h.self_diff()
self.assertEqual(h.count(),5)
self.assertEqual(h.count_diff(),0)
def testRW1(self):
tf = TF(1)
tf.add_rewrite_rule(TF.create_standard_rule([1], "10xxxxxx", [2], \
"10011111", "01100000"))
hs = headerspace(1)
hs.add_hs(wildcard_create_from_string("1001xxxx"))
result = tf.T(hs, 1)
self.assertEqual(len(result), 1)
self.assert_(wildcard_is_equal(result[0][0].hs_list[0],\
wildcard_create_from_string("1111xxxx")))
def detect_loop(NTF, TTF, ports, test_packet=None, out_port_offset=0):
loops = []
for port in ports:
print "port %d is being checked" % port
propagation = []
# put all-x test packet in propagation graph
test_pkt = test_packet
if test_pkt == None:
all_x = wildcard_create_bit_repeat(NTF.length, 0x3)
test_pkt = headerspace(NTF.length)
test_pkt.add_hs(all_x)
p_node = {}
p_node["hdr"] = test_pkt
p_node["port"] = port
p_node["visits"] = []
p_node["hs_history"] = []
propagation.append(p_node)
while len(propagation) > 0:
#get the next node in propagation graph and apply it to NTF and TTF
print "Propagation has length: %d" % len(propagation)
tmp_propag = []
for p_node in propagation:
next_hp = NTF.T(p_node["hdr"], p_node["port"])
for (next_h, next_ps) in next_hp:
for next_p in next_ps:
linked = TTF.T(next_h, next_p)
for (linked_h, linked_ports) in linked:
for linked_p in linked_ports:
new_p_node = {}
new_p_node["hdr"] = linked_h
new_p_node["port"] = linked_p
new_p_node["visits"] = list(p_node["visits"])
new_p_node["visits"].append(p_node["port"])
#new_p_node["visits"].append(next_p)
new_p_node["hs_history"] = list(
p_node["hs_history"])
new_p_node["hs_history"].append(p_node["hdr"])
#print new_p_node
if len(
new_p_node["visits"]
) > 0 and new_p_node["visits"][0] == linked_p:
loops.append(new_p_node)
print "loop detected"
elif linked_p in new_p_node["visits"] or (
linked_p + out_port_offset
) in new_p_node["visits"]:
pass
else:
tmp_propag.append(new_p_node)
propagation = tmp_propag
return loops
def testIntersect1(self):
'''
Test intersect with a bytearray
'''
h = headerspace(1)
h.add_hs(wildcard_create_from_string("1001xxxx"))
h.add_hs(wildcard_create_from_string("11xxxx11"))
h.diff_hs(wildcard_create_from_string("100xx000"))
h.diff_hs(wildcard_create_from_string("1xxx1x11"))
h.intersect(wildcard_create_from_string("xxxxx011"))
self.assertEqual(h.count(),2)
self.assertEqual(h.count_diff(),2)
def testDependency(self):
tf = TF(1)
tf.add_fwd_rule(TF.create_standard_rule([1], "10xxxxxx", [2], \
None, None))
tf.add_rewrite_rule(TF.create_standard_rule([1], "1xxxxxxx", [3], "00111111", "10000000","",[]))
hs = headerspace(1)
hs.add_hs(wildcard_create_from_string("xxxxxxxx"))
result = tf.T(hs, 1)
self.assertEqual(len(result), 2, "Expecting both rules to be matched")
self.assertTrue(wildcard_is_equal(
result[1][0].hs_list[0],\
wildcard_create_from_string("10xxxxxx"),\
), \
"unexpected second byte array")
def detect_loop(NTF, TTF, ports, test_packet = None, out_port_offset = 0):
loops = []
for port in ports:
print "port %d is being checked"%port
propagation = []
# put all-x test packet in propagation graph
test_pkt = test_packet
if test_pkt == None:
all_x = wildcard_create_bit_repeat(NTF.length,0x3)
test_pkt = headerspace(NTF.length)
test_pkt.add_hs(all_x)
p_node = {}
p_node["hdr"] = test_pkt
p_node["port"] = port
p_node["visits"] = []
p_node["hs_history"] = []
propagation.append(p_node)
while len(propagation)>0:
#get the next node in propagation graph and apply it to NTF and TTF
print "Propagation has length: %d"%len(propagation)
tmp_propag = []
for p_node in propagation:
next_hp = NTF.T(p_node["hdr"],p_node["port"])
for (next_h,next_ps) in next_hp:
for next_p in next_ps:
linked = TTF.T(next_h,next_p)
for (linked_h,linked_ports) in linked:
for linked_p in linked_ports:
new_p_node = {}
new_p_node["hdr"] = linked_h
new_p_node["port"] = linked_p
new_p_node["visits"] = list(p_node["visits"])
new_p_node["visits"].append(p_node["port"])
#new_p_node["visits"].append(next_p)
new_p_node["hs_history"] = list(p_node["hs_history"])
new_p_node["hs_history"].append(p_node["hdr"])
#print new_p_node
if len(new_p_node["visits"]) > 0 and new_p_node["visits"][0] == linked_p:
loops.append(new_p_node)
print "loop detected"
elif linked_p in new_p_node["visits"] or (linked_p + out_port_offset) in new_p_node["visits"]:
pass
else:
tmp_propag.append(new_p_node)
propagation = tmp_propag
return loops
def testDiffHS(self):
'''
Test the diff (lazy subtraction):
1) adding a diff before having anything doesn't add any diff to hs
2) adding a diff actually adds correct number of diff bytearrays
3) adding a new bytearray that has intersection with a previously added
diff doesn't add that diff to the new bytearray.
'''
h = headerspace(1)
h.diff_hs(wildcard_create_from_string("1001xxxx"))
h.add_hs(wildcard_create_from_string("1001xxxx"))
h.add_hs(wildcard_create_from_string("11xxxx11"))
self.assertEqual(h.count_diff(),0)
h.diff_hs(wildcard_create_from_string("1xxx1111"))
self.assertEqual(h.count_diff(),2)
h.add_hs(wildcard_create_from_string("xxxxxx11"))
self.assertEqual(h.count_diff(),2)
def testInverse(self):
tf = TF(1)
tf.add_rewrite_rule(TF.create_standard_rule([1], "10xxxxxx", [2], \
"10011111", "01100000"))
hs = headerspace(1)
hs.add_hs(wildcard_create_from_string("111xxxxx"))
hs.diff_hs(wildcard_create_from_string("1110xxxx"))
result = tf.T_inv(hs, 2)
self.assertEqual(len(result), 1)
self.assertEqual(result[0][0].count(),1)
self.assertEqual(result[0][0].count_diff(),1)
self.assert_(wildcard_is_equal(result[0][0].hs_list[0],\
wildcard_create_from_string("10xxxxxx"),\
))
self.assert_(wildcard_is_equal(result[0][0].hs_diff[0][0],\
wildcard_create_from_string("10x0xxxx"),\
))
def testCopy(self):
'''
Test if copy works correctly
Adding new stuff on the original hs, doesn't affect copied hs.
'''
h = headerspace(1)
h.add_hs(wildcard_create_from_string("1001xxxx"))
h.add_hs(wildcard_create_from_string("11xxxx11"))
h.diff_hs(wildcard_create_from_string("100x0000"))
h.diff_hs(wildcard_create_from_string("1xxx1111"))
hcpy = h.copy()
self.assertEqual(h.count(),hcpy.count())
self.assertEqual(h.count_diff(),hcpy.count_diff())
h.add_hs(wildcard_create_from_string("100100xx"))
self.assertEqual(h.count(),3)
self.assertEqual(h.count_diff(),3)
self.assertEqual(hcpy.count(),2)
self.assertEqual(h.count_diff(),3)
for line in f:
if (not line.startswith("$")) and line != "":
tokens = line.strip().split(":")
port = int(tokens[1]) + settings["port_type_multiplier"] * \
settings["mid_port_type_const"]
N.add_link(port, port)
# add link for forward engine port
for i in range(len(settings["rtr_names"])):
fwd_link = (i + 1) * settings["switch_id_multiplier"]
N.add_link(fwd_link, fwd_link)
# add a source node at yoza-te1/4
src_port_id = map["yoza_rtr"]["te1/4"]
N.add_link(1, src_port_id)
hs = headerspace(N.length)
hs.add_hs(wildcard_create_bit_repeat(N.length, 0x3))
N.add_source("yoza-source", hs, [1])
rule_ids = []
for rtr_name in settings["rtr_names"]:
f = TF(1)
f.load_object_from_file("%s/%s.tf" % (settings["input_path"], rtr_name))
for rule in f.rules:
in_ports = rule["in_ports"]
out_ports = rule["out_ports"]
match = rule["match"]
mask = rule["mask"]
rewrite = rule["rewrite"]
st = time()
rule_ids.append(\
