from framework import VppTestCase, VppTestRunner, running_extended_tests
from vpp_ip_route import VppIpTable, VppIpRoute, VppRoutePath
+from scapy.contrib.geneve import GENEVE
+from scapy.packet import Raw
+from scapy.layers.l2 import Ether
+from scapy.layers.inet import IP, UDP
+from scapy.layers.vxlan import VXLAN
+from scapy.compat import raw
+from scapy.utils import rdpcap
+
class TestTracefilter(VppTestCase):
""" Packet Tracer Filter Test """
def setUp(self):
super(TestTracefilter, self).setUp()
+ self.create_pg_interfaces(range(2))
+ self.pg0.generate_remote_hosts(11)
+ for i in self.pg_interfaces:
+ i.admin_up()
+ i.config_ip4()
+ i.resolve_arp()
def tearDown(self):
super(TestTracefilter, self).tearDown()
+ for i in self.pg_interfaces:
+ i.unconfig()
+ i.admin_down()
+
+ def cli(self, cmd):
+ r = self.vapi.cli_return_response(cmd)
+ if r.retval != 0:
+ s = "reply '%s'" % r.reply if hasattr(
+ r, "reply") else "retval '%s'" % r.retval
+ raise RuntimeError("cli command '%s' FAIL with %s" % (cmd, s))
+ return r
+
+ # check number of hits for classifier
+ def assert_hits(self, n):
+ r = self.cli("show classify table verbose")
+ self.assertTrue(r.reply.find("hits %i" % n) != -1)
+
+ def add_trace_filter(self, mask, match):
+ self.cli("classify filter trace mask %s match %s" % (mask, match))
+ self.cli("clear trace")
+ self.cli("trace add pg-input 1000 filter")
- def test_mactime_unitTest(self):
+ def del_trace_filters(self):
+ self.cli("classify filter trace del")
+ r = self.cli("show classify filter")
+ s = "packet tracer: first table none"
+ self.assertTrue(r.reply.find(s) != -1)
+
+ def del_pcap_filters(self):
+ self.cli("classify filter pcap del")
+ r = self.cli("show classify filter")
+ s = "pcap rx/tx/drop: first table none"
+ self.assertTrue(r.reply.find(s) != -1)
+
+ def test_basic(self):
""" Packet Tracer Filter Test """
- cmds = ["loopback create",
- "set int ip address loop0 192.168.1.1/24",
- "set int state loop0 up",
- "packet-generator new {\n"
- " name classifyme\n"
- " limit 100\n"
- " size 300-300\n"
- " interface loop0\n"
- " node ethernet-input\n"
- " data { \n"
- " IP4: 1.2.3 -> 4.5.6\n"
- " UDP: 192.168.1.10 - 192.168.1.20 -> 192.168.2.10\n"
- " UDP: 1234 -> 2345\n"
- " incrementing 286\n"
- " }\n"
- "}\n",
- "classify filter trace mask l3 ip4 src\n"
- " match l3 ip4 src 192.168.1.15",
- "trace add pg-input 100 filter",
- "pa en"]
-
- for cmd in cmds:
- r = self.vapi.cli_return_response(cmd)
- if r.retval != 0:
- if hasattr(r, 'reply'):
- self.logger.info(cmd + " FAIL reply " + r.reply)
- else:
- self.logger.info(cmd + " FAIL retval " + str(r.retval))
-
- # Check for 9 classifier hits, which is the right answer
- r = self.vapi.cli_return_response("show classify table verbose 2")
- self.assertTrue(r.retval == 0)
- self.assertTrue(hasattr(r, 'reply'))
- self.assertTrue(r.reply.find("hits 9") != -1)
+ self.add_trace_filter(
+ "l3 ip4 src",
+ "l3 ip4 src %s" %
+ self.pg0.remote_hosts[5].ip4)
+ self.add_trace_filter(
+ "l3 ip4 proto l4 src_port",
+ "l3 ip4 proto 17 l4 src_port 2345")
+ # the packet we are trying to match
+ p = list()
+ for i in range(100):
+ src = self.pg0.remote_hosts[i % len(self.pg0.remote_hosts)].ip4
+ p.append((Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IP(src=src, dst=self.pg1.remote_ip4) /
+ UDP(sport=1234, dport=2345) / Raw('\xa5' * 100)))
+ for i in range(17):
+ p.append((Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_hosts[0].ip4,
+ dst=self.pg1.remote_ip4) /
+ UDP(sport=2345, dport=1234) / Raw('\xa5' * 100)))
+
+ self.send_and_expect(self.pg0, p, self.pg1, trace=False)
+
+ # Check for 9 and 17 classifier hits, which is the right answer
+ self.assert_hits(9)
+ self.assert_hits(17)
+
+ self.del_trace_filters()
+
+ # install a classify rule, inject traffic and check for hits
+ def assert_classify(self, mask, match, packets, n=None):
+ self.add_trace_filter("hex %s" % mask, "hex %s" % match)
+ self.send_and_expect(self.pg0, packets, self.pg1, trace=False)
+ self.assert_hits(n if n is not None else len(packets))
+ self.del_trace_filters()
+
+ def test_encap(self):
+ """ Packet Tracer Filter Test with encap """
+
+ # the packet we are trying to match
+ p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) /
+ UDP() /
+ VXLAN() /
+ Ether() /
+ IP() /
+ UDP() /
+ GENEVE(vni=1234) /
+ Ether() /
+ IP(src='192.168.4.167') /
+ UDP() /
+ Raw('\xa5' * 100))
+
+ #
+ # compute filter mask & value
+ # we compute it by XOR'ing a template packet with a modified packet
+ # we need to set checksums to 0 to make sure scapy will not recompute
+ # them
+ #
+ tmpl = (Ether() /
+ IP(chksum=0) /
+ UDP(chksum=0) /
+ VXLAN() /
+ Ether() /
+ IP(chksum=0) /
+ UDP(chksum=0) /
+ GENEVE(vni=0) /
+ Ether() /
+ IP(src='0.0.0.0', chksum=0))
+ ori = raw(tmpl)
+
+ # the mask
+ tmpl[GENEVE].vni = 0xffffff
+ user = tmpl[GENEVE].payload
+ user[IP].src = '255.255.255.255'
+ new = raw(tmpl)
+ mask = "".join(("{:02x}".format(o ^ n) for o, n in zip(ori, new)))
+
+ # this does not match (wrong vni)
+ tmpl[GENEVE].vni = 1
+ user = tmpl[GENEVE].payload
+ user[IP].src = '192.168.4.167'
+ new = raw(tmpl)
+ match = "".join(("{:02x}".format(o ^ n) for o, n in zip(ori, new)))
+ self.assert_classify(mask, match, [p] * 11, 0)
+
+ # this must match
+ tmpl[GENEVE].vni = 1234
+ new = raw(tmpl)
+ match = "".join(("{:02x}".format(o ^ n) for o, n in zip(ori, new)))
+ self.assert_classify(mask, match, [p] * 17)
+
+ def test_pcap(self):
+ """ Packet Capture Filter Test """
+ self.cli(
+ "classify filter pcap mask l3 ip4 src match l3 ip4 src %s" %
+ self.pg0.remote_hosts[5].ip4)
+ self.cli(
+ "classify filter pcap "
+ "mask l3 ip4 proto l4 src_port "
+ "match l3 ip4 proto 17 l4 src_port 2345")
+ self.cli(
+ "pcap trace rx tx max 1000 intfc pg0 "
+ "file vpp_test_trace_filter_test_pcap.pcap filter")
+ # the packet we are trying to match
+ p = list()
+ for i in range(100):
+ src = self.pg0.remote_hosts[i % len(self.pg0.remote_hosts)].ip4
+ p.append((Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IP(src=src, dst=self.pg1.remote_ip4) /
+ UDP(sport=1234, dport=2345) / Raw('\xa5' * 100)))
+ for i in range(17):
+ p.append((Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_hosts[0].ip4,
+ dst=self.pg1.remote_ip4) /
+ UDP(sport=2345, dport=1234) / Raw('\xa5' * 100)))
+
+ self.send_and_expect(self.pg0, p, self.pg1, trace=False)
+
+ # Check for 9 and 17 classifier hits, which is the right answer
+ self.assert_hits(9)
+ self.assert_hits(17)
+
+ self.cli("pcap trace rx tx off")
+ self.del_pcap_filters()
+
+ # check captured pcap
+ pcap = rdpcap("/tmp/vpp_test_trace_filter_test_pcap.pcap")
+ self.assertEqual(len(pcap), 9 + 17)
+ p_ = str(p[5])
+ for i in range(9):
+ self.assertEqual(str(pcap[i]), p_)
+ p_ = str(p[100])
+ for i in range(9, 9 + 17):
+ self.assertEqual(str(pcap[i]), p_)
+
+ def test_pcap_drop(self):
+ """ Drop Packet Capture Filter Test """
+ self.cli(
+ "pcap trace drop max 1000 "
+ "error {ip4-udp-lookup}.{No listener for dst port} "
+ "file vpp_test_trace_filter_test_pcap_drop.pcap")
+ # the packet we are trying to match
+ p = list()
+ for i in range(17):
+ # this packet should be forwarded
+ p.append((Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_hosts[0].ip4,
+ dst=self.pg1.remote_ip4) /
+ UDP(sport=2345, dport=1234) / Raw('\xa5' * 100)))
+ # this packet should be captured (no listener)
+ p.append((Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_hosts[0].ip4,
+ dst=self.pg0.local_ip4) /
+ UDP(sport=2345, dport=1234) / Raw('\xa5' * 100)))
+ # this packet will be blackholed but not captured
+ p.append((Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_hosts[0].ip4, dst="0.0.0.0") /
+ UDP(sport=2345, dport=1234) / Raw('\xa5' * 100)))
+
+ self.send_and_expect(self.pg0, p, self.pg1, n_rx=17, trace=False)
+
+ self.cli("pcap trace drop off")
+
+ # check captured pcap
+ pcap = rdpcap("/tmp/vpp_test_trace_filter_test_pcap_drop.pcap")
+ self.assertEqual(len(pcap), 17)
+
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
Code Review / vpp.git / blobdiff