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-rw-r--r--test/test_cdp.py155
1 files changed, 155 insertions, 0 deletions
diff --git a/test/test_cdp.py b/test/test_cdp.py
new file mode 100644
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--- /dev/null
+++ b/test/test_cdp.py
@@ -0,0 +1,155 @@
+#!/usr/bin/env python3
+""" CDP tests """
+
+from scapy.packet import Packet
+from scapy.all import ShortField, StrField
+from scapy.layers.l2 import Dot3, LLC, SNAP
+from scapy.contrib.cdp import CDPMsgDeviceID, CDPMsgSoftwareVersion, \
+ CDPMsgPlatform, CDPMsgPortID, CDPv2_HDR
+
+from framework import VppTestCase
+from scapy.all import raw
+from re import compile
+from time import sleep
+from util import ppp
+import platform
+import sys
+import unittest
+
+
+""" TestCDP is a subclass of VPPTestCase classes.
+
+CDP test.
+
+"""
+
+
+class CustomTLV(Packet):
+ """ Custom TLV protocol layer for scapy """
+
+ fields_desc = [
+ ShortField("type", 0),
+ ShortField("length", 4),
+ StrField("value", "")
+
+ ]
+
+
+class TestCDP(VppTestCase):
+ """ CDP Test Case """
+
+ nen_ptr = compile(r"not enabled")
+ cdp_ptr = compile(r"^([-\.\w]+)\s+([-\.\w]+)\s+([-\.\w]+)\s+([-\.\w]+)$")
+ err_ptr = compile(r"^([\d]+)\s+([-\w]+)\s+([ -\.\w)(]+)$")
+
+ @property
+ def device_id(self):
+ return platform.node()
+
+ @property
+ def version(self):
+ return platform.release()
+
+ @property
+ def port_id(self):
+ return self.interface.name
+
+ @property
+ def platform(self):
+ return platform.system()
+
+ @classmethod
+ def setUpClass(cls):
+ super(TestCDP, cls).setUpClass()
+ try:
+ cls.create_pg_interfaces(range(1))
+ cls.interface = cls.pg_interfaces[0]
+
+ cls.interface.admin_up()
+ cls.interface.config_ip4()
+ cls.interface.resolve_arp()
+
+ except Exception:
+ super(TestCDP, cls).tearDownClass()
+ raise
+
+ @classmethod
+ def tearDownClass(cls):
+ super(TestCDP, cls).tearDownClass()
+
+ def test_enable_cdp(self):
+ self.logger.info(self.vapi.cdp_enable_disable(enable_disable=1))
+ ret = self.vapi.cli("show cdp")
+ self.logger.info(ret)
+ not_enabled = self.nen_ptr.search(ret)
+ self.assertFalse(not_enabled, "CDP isn't enabled")
+
+ def test_send_cdp_packet(self):
+ self.logger.info(self.vapi.cdp_enable_disable(enable_disable=1))
+ self.send_packet(self.create_packet())
+
+ neighbors = list(self.show_cdp())
+ self.assertTrue(neighbors, "CDP didn't register neighbor")
+
+ port, system = neighbors[0]
+ length = min(len(system), len(self.device_id))
+
+ self.assert_equal(port, self.port_id, "CDP received invalid port id")
+ self.assert_equal(system[:length], self.device_id[:length],
+ "CDP received invalid device id")
+
+ def test_cdp_underflow_tlv(self):
+ self.send_bad_packet(3, ".")
+
+ def test_cdp_overflow_tlv(self):
+ self.send_bad_packet(8, ".")
+
+ def send_bad_packet(self, l, v):
+ self.logger.info(self.vapi.cdp_enable_disable(enable_disable=1))
+ self.send_packet(self.create_bad_packet(l, v))
+
+ err = self.statistics.get_err_counter(
+ '/err/cdp-input/cdp packets with bad TLVs')
+ self.assertTrue(err >= 1, "CDP didn't drop bad packet")
+
+ def send_packet(self, packet):
+ self.logger.debug(ppp("Sending packet:", packet))
+ self.interface.add_stream(packet)
+ self.pg_start()
+
+ def create_base_packet(self):
+ packet = (Dot3(src=self.interface.remote_mac,
+ dst="01:00:0c:cc:cc:cc") /
+ LLC(dsap=0xaa, ssap=0xaa, ctrl=0x03) /
+ SNAP()/CDPv2_HDR())
+ return packet
+
+ def create_packet(self):
+ packet = (self.create_base_packet() /
+ CDPMsgDeviceID(val=self.device_id) /
+ CDPMsgSoftwareVersion(val=self.version) /
+ CDPMsgPortID(iface=self.port_id) /
+ CDPMsgPlatform(val=self.platform))
+ return packet
+
+ def create_bad_packet(self, tl=4, tv=""):
+ packet = (self.create_base_packet() /
+ CustomTLV(type=1,
+ length=tl,
+ value=tv))
+ return packet
+
+ def process_cli(self, exp, ptr):
+ for line in self.vapi.cli(exp).split('\n')[1:]:
+ m = ptr.match(line.strip())
+ if m:
+ yield m.groups()
+
+ def show_cdp(self):
+ for pack in self.process_cli("show cdp", self.cdp_ptr):
+ try:
+ port, system, _, _ = pack
+ except ValueError:
+ pass
+ else:
+ yield port, system