def test_udp_stream_frags_and_ooo(self):
myrpkt = RulePkt("to server", "/my udp3/", 3, 5, 250)
mytsrule = TrafficStreamRule('udp', '1.2.3.6', '9.8.7.6', '9005',
'105', -1, 4, False, False, False, True,
75)
mytsrule.addPktRule(myrpkt)
myConfig = SnifflesConfig()
myConfig.setPktLength(250)
myConfig.setIPV6Percent(0)
myConfig.setFullMatch(True)
myts = TrafficStream(mytsrule, myConfig)
mycount = 0
myfragid = 0
mylastoff = -1
ooo = False
while myts.hasPackets():
mypkt = myts.getNextPacket()
if mypkt.network_hdr.get_frag_id() != myfragid:
myfragid = mypkt.network_hdr.get_frag_id()
if mylastoff > -1:
if abs((mypkt.network_hdr.get_frag_offset() & 0xFF) -
mylastoff) > 11:
ooo = True
mylastoff = (mypkt.network_hdr.get_frag_offset() & 0xFF)
self.assertIn(mypkt.get_size(), [116, 122])
self.assertEqual(mypkt.get_src_ip(), '1.2.3.6')
self.assertEqual(mypkt.get_dst_ip(), '9.8.7.6')
self.assertIn(mypkt.network_hdr.get_frag_offset(),
[8192, 8203, 22])
mycount += 1
self.assertEqual(mycount, 15)
self.assertEqual(ooo, True)
def test_ttl_expiry_scenario3(self):
"""
ttl = 110 and ttl_expiry = 6 and fragment is 2
create two good packet with ttl value is 110
and malicious packet with ttl value is 6
the totall is 3 packet
"""
myrpkt = RulePkt("to server", "/my tcp2/", 2, 1, ttl=110, ttl_expiry=6)
mytsrule = TrafficStreamRule('tcp', '1.2.3.4', '9.8.7.5', '9000',
'101', -1, 4, False, False, False)
mytsrule.addPktRule(myrpkt)
myConfig = SnifflesConfig()
myConfig.setPktLength(140)
myConfig.setIPV6Percent(0)
myConfig.setFullMatch(True)
myts = TrafficStream(mytsrule, myConfig)
mycount = 0
while myts.hasPackets():
mypkt = myts.getNextPacket()
if mycount % 2 == 0:
self.assertEqual(mypkt.get_ttl(), 110)
else:
self.assertEqual(mypkt.get_ttl(), 6)
mycount += 1
self.assertEqual(mycount, 3)
def test_ttl_expiry_scenario5(self):
"""
5)ttl_expiry = 9 and fragment is 3
create three good packet with random ttl value
malicious packet with ttl value is 9
the totall is 5 packet
"""
myrpkt = RulePkt("to server", "/abcdefghik/", 3, 1, ttl_expiry=9)
mytsrule = TrafficStreamRule('tcp', '1.2.3.4', '9.8.7.5', '9000',
'101', -1, 4, False, False, False)
mytsrule.addPktRule(myrpkt)
myConfig = SnifflesConfig()
myConfig.setPktLength(140)
myConfig.setIPV6Percent(0)
myConfig.setFullMatch(True)
myts = TrafficStream(mytsrule, myConfig)
mycount = 0
while myts.hasPackets():
mypkt = myts.getNextPacket()
if mycount % 2 != 0:
self.assertEqual(mypkt.get_ttl(), 9)
mycount += 1
self.assertEqual(mycount, 5)
def test_tcp_stream_frag(self):
myrpkt = RulePkt("to server", "/my tcp2/", 4, 3)
mytsrule = TrafficStreamRule('tcp', '1.2.3.4', '9.8.7.5', '9000',
'101', -1, 4, False, True, True)
mytsrule.addPktRule(myrpkt)
myConfig = SnifflesConfig()
myConfig.setPktLength(140)
myConfig.setIPV6Percent(0)
myts = TrafficStream(mytsrule, myConfig)
mypkt = myts.getNextPacket()
self.assertEqual(mypkt.transport_hdr.get_flags(), SYN)
mypkt = myts.getNextPacket()
self.assertEqual(mypkt.transport_hdr.get_flags(), SYN + ACK)
for _ in range(0, 12):
mypkt = myts.getNextPacket()
self.assertNotEqual(mypkt.network_hdr.get_frag_id(), 0)
self.assertIn(mypkt.network_hdr.get_frag_offset(),
[8192, 8197, 8202, 8207, 15])
mypkt = myts.getNextPacket()
self.assertEqual(mypkt.transport_hdr.get_flags(), FIN + ACK)
mypkt = myts.getNextPacket()
self.assertEqual(mypkt.transport_hdr.get_flags(), ACK)
mypkt = myts.getNextPacket()
self.assertEqual(mypkt.transport_hdr.get_flags(), FIN + ACK)
mypkt = myts.getNextPacket()
self.assertEqual(mypkt.transport_hdr.get_flags(), ACK)
def test_tcp_stream(self):
myrpkt = RulePkt("to server", "/my tcp1/", 0, 3)
mytsrule = TrafficStreamRule('tcp', '1.2.3.4', '9.8.7.5', '9000',
'101', -1, 4, False, True, True)
mytsrule.addPktRule(myrpkt)
myConfig = SnifflesConfig()
myConfig.setPktLength(100)
myConfig.setIPV6Percent(0)
myConfig.setFullMatch(True)
myts = TrafficStream(mytsrule, myConfig)
mypkt = myts.getNextPacket()
myseq = mypkt.transport_hdr.get_seq_num()
self.assertEqual(mypkt.transport_hdr.get_flags(), SYN)
mypkt = myts.getNextPacket()
self.assertEqual(mypkt.transport_hdr.get_flags(), SYN + ACK)
for i in range(0, 3):
mypkt = myts.getNextPacket()
self.assertEqual(mypkt.transport_hdr.get_seq_num(),
myseq + (i * 100) + 1)
self.assertEqual(mypkt.get_src_ip(), '1.2.3.4')
self.assertEqual(mypkt.get_dst_ip(), '9.8.7.5')
mypkt = myts.getNextPacket()
self.assertEqual(mypkt.transport_hdr.get_flags(), FIN + ACK)
mypkt = myts.getNextPacket()
self.assertEqual(mypkt.transport_hdr.get_flags(), ACK)
mypkt = myts.getNextPacket()
self.assertEqual(mypkt.transport_hdr.get_flags(), FIN + ACK)
mypkt = myts.getNextPacket()
self.assertEqual(mypkt.transport_hdr.get_flags(), ACK)
def test_split(self):
myrpkt = RulePkt("to server", "/my split message/", 0, 1, -1, False,
False, 2)
mytsrule = TrafficStreamRule('tcp', '1.2.3.6', '9.8.7.6', '9005',
'105')
mytsrule.addPktRule(myrpkt)
myConfig = SnifflesConfig()
myConfig.setPktLength(-1)
myConfig.setIPV6Percent(0)
myConfig.setFullMatch(True)
myts = TrafficStream(mytsrule, myConfig)
mycount = 0
while myts.hasPackets():
mypkt = myts.getNextPacket()
self.assertEqual(mypkt.get_size(), 62)
mycount += 1
self.assertEqual(mycount, 2)
def test_udp_stream(self):
myrpkt = RulePkt("to server", "/my udp1/", 0, 3)
mytsrule = TrafficStreamRule('udp', '1.2.3.6', '9.8.7.6', '9005',
'105')
mytsrule.addPktRule(myrpkt)
myConfig = SnifflesConfig()
myConfig.setPktLength(25)
myConfig.setIPV6Percent(0)
myConfig.setFullMatch(True)
myts = TrafficStream(mytsrule, myConfig)
mycount = 0
while myts.hasPackets():
mypkt = myts.getNextPacket()
self.assertEqual(mypkt.get_size(), 67)
self.assertEqual(mypkt.get_src_ip(), '1.2.3.6')
self.assertEqual(mypkt.get_dst_ip(), '9.8.7.6')
mycount += 1
self.assertEqual(mycount, 3)
def test_udp_stream_frags(self):
myrpkt = RulePkt("to server", "/my udp2/", 3, 2)
mytsrule = TrafficStreamRule('udp', '1.2.3.6', '9.8.7.6', '9005',
'105')
mytsrule.addPktRule(myrpkt)
myConfig = SnifflesConfig()
myConfig.setPktLength(250)
myConfig.setIPV6Percent(0)
myConfig.setFullMatch(True)
myts = TrafficStream(mytsrule, myConfig)
mycount = 0
while myts.hasPackets():
mypkt = myts.getNextPacket()
self.assertIn(mypkt.get_size(), [116, 122])
self.assertEqual(mypkt.get_src_ip(), '1.2.3.6')
self.assertEqual(mypkt.get_dst_ip(), '9.8.7.6')
self.assertIn(mypkt.network_hdr.get_frag_offset(),
[8192, 8203, 22])
mycount += 1
self.assertEqual(mycount, 6)
def test_ttl_expiry_scenario1(self):
"""
1)tll = 110, no fragment
one packet should have ttl is 110
"""
myrpkt = RulePkt("to server", "/my tcp2/", 0, 1, ttl=110)
mytsrule = TrafficStreamRule('tcp', '1.2.3.4', '9.8.7.5', '9000',
'101', -1, 4, False, False, False)
mytsrule.addPktRule(myrpkt)
myConfig = SnifflesConfig()
myConfig.setPktLength(140)
myConfig.setIPV6Percent(0)
myConfig.setFullMatch(True)
myts = TrafficStream(mytsrule, myConfig)
mycount = 0
while myts.hasPackets():
mypkt = myts.getNextPacket()
self.assertEqual(mypkt.get_ttl(), 110)
mycount += 1
self.assertEqual(mycount, 1)
def test_tcp_stream_frag_ooo(self):
myrpkt = RulePkt("to server", "/my tcp2/", 4, 3, 140, False, True)
mytsrule = TrafficStreamRule('tcp', '1.2.3.4', '9.8.7.5', '9000',
'101', -1, 4, False, True, True)
mytsrule.addPktRule(myrpkt)
myConfig = SnifflesConfig()
myConfig.setPktLength(140)
myConfig.setIPV6Percent(0)
myConfig.setFullMatch(True)
myts = TrafficStream(mytsrule, myConfig)
mypkt = myts.getNextPacket()
self.assertEqual(mypkt.transport_hdr.get_flags(), SYN)
mypkt = myts.getNextPacket()
self.assertEqual(mypkt.transport_hdr.get_flags(), SYN + ACK)
myfragid = 0
mylastoff = -1
ooo = False
for _ in range(0, 12):
mypkt = myts.getNextPacket()
self.assertNotEqual(mypkt.network_hdr.get_frag_id(), 0)
self.assertIn(mypkt.network_hdr.get_frag_offset(),
[8192, 8197, 8202, 8207, 15])
if mypkt.network_hdr.get_frag_id() != myfragid:
myfragid = mypkt.network_hdr.get_frag_id()
if mylastoff > -1:
if abs((mypkt.network_hdr.get_frag_offset() & 0xFF) -
mylastoff) > 5:
ooo = True
else:
mylastoff = (mypkt.network_hdr.get_frag_offset() & 0xFF)
self.assertEqual(ooo, True)
mypkt = myts.getNextPacket()
self.assertEqual(mypkt.transport_hdr.get_flags(), FIN + ACK)
mypkt = myts.getNextPacket()
self.assertEqual(mypkt.transport_hdr.get_flags(), ACK)
mypkt = myts.getNextPacket()
self.assertEqual(mypkt.transport_hdr.get_flags(), FIN + ACK)
mypkt = myts.getNextPacket()
self.assertEqual(mypkt.transport_hdr.get_flags(), ACK)
def test_ttl_expiry_scenario4(self):
"""
4)ttl = 147 and ttl_expiry = 0 and fragment is 2
create two packet with ttl value is 147
since ttl_expiry is 0
"""
myrpkt = RulePkt("to server", "/my tcp2/", 2, 1, ttl=147, ttl_expiry=0)
mytsrule = TrafficStreamRule('tcp', '1.2.3.4', '9.8.7.5', '9000',
'101', -1, 4, False, False, False)
mytsrule.addPktRule(myrpkt)
myConfig = SnifflesConfig()
myConfig.setPktLength(140)
myConfig.setIPV6Percent(0)
myConfig.setFullMatch(True)
myts = TrafficStream(mytsrule, myConfig)
mycount = 0
while myts.hasPackets():
mypkt = myts.getNextPacket()
self.assertEqual(mypkt.get_ttl(), 147)
mycount += 1
self.assertEqual(mycount, 2)
def test_udp_stream_frags_loss(self):
myrpkt = RulePkt("to server", RuleContent("pcre", "/my udp4/"), 3, 2,
250)
mytsrule = TrafficStreamRule('udp', '1.2.3.6', '9.8.7.6', '9005',
'105', -1, 4, False, False, False, False,
0, 99)
mytsrule.addPktRule(myrpkt)
myConfig = SnifflesConfig()
myConfig.setPktLength(250)
myConfig.setIPV6Percent(0)
myConfig.setFullMatch(True)
myts = TrafficStream(mytsrule, myConfig)
mycount = 0
while myts.hasPackets():
mypkt = myts.getNextPacket()
if mypkt is None:
mycount += 1
self.assertTrue(mycount > 0) # Should be at least one lost fragement.
myrpkt2 = RulePkt("to server", RuleContent("pcre", "/my udp4/"), 3, 2,
250)
mytsrule2 = TrafficStreamRule('udp', '1.2.3.6', '9.8.7.6', '9005',
'105', -1, 4, False, False, False, False,
0, 0)
mytsrule2.addPktRule(myrpkt2)
myConfig2 = SnifflesConfig()
myConfig2.setPktLength(250)
myConfig2.setIPV6Percent(0)
myConfig2.setFullMatch(True)
myts2 = TrafficStream(mytsrule2, myConfig2)
mycount = 0
while myts2.hasPackets():
mypkt = myts2.getNextPacket()
if mypkt is not None:
mycount += 1
self.assertEqual(mycount, 6) # should be no lost fragments.