TEST:add L2BD arp term tests
Change-Id: I42414da9663ecfc8dfe5baf3e6615cf3b9b02e22
Signed-off-by: Eyal Bari <ebari@cisco.com>
diff --git a/test/test_l2bd_arp_term.py b/test/test_l2bd_arp_term.py
new file mode 100644
index 0000000..52c1ad3
--- /dev/null
+++ b/test/test_l2bd_arp_term.py
@@ -0,0 +1,239 @@
+#!/usr/bin/env python
+""" L2BD ARP term Test """
+
+import unittest
+import random
+import copy
+
+from scapy.packet import Raw
+from scapy.layers.l2 import Ether, ARP
+from scapy.layers.inet import IP
+
+from framework import VppTestCase, VppTestRunner
+from util import Host, ppp, mactobinary
+
+
+class TestL2bdArpTerm(VppTestCase):
+ """ L2BD arp termination Test Case """
+
+ @classmethod
+ def setUpClass(cls):
+ """
+ Perform standard class setup (defined by class method setUpClass in
+ class VppTestCase) before running the test case, set test case related
+ variables and configure VPP.
+ """
+ super(TestL2bdArpTerm, cls).setUpClass()
+
+ try:
+ # Create pg interfaces
+ n_bd = 1
+ cls.ifs_per_bd = ifs_per_bd = 3
+ n_ifs = n_bd * ifs_per_bd
+ cls.create_pg_interfaces(range(n_ifs))
+
+ # Set up all interfaces
+ for i in cls.pg_interfaces:
+ i.admin_up()
+
+ cls.hosts = set()
+
+ except Exception:
+ super(TestL2bdArpTerm, cls).tearDownClass()
+ raise
+
+ def setUp(self):
+ """
+ Clear trace and packet infos before running each test.
+ """
+ self.reset_packet_infos()
+ super(TestL2bdArpTerm, self).setUp()
+
+ def tearDown(self):
+ """
+ Show various debug prints after each test.
+ """
+ super(TestL2bdArpTerm, self).tearDown()
+ if not self.vpp_dead:
+ self.logger.info(self.vapi.ppcli("show l2fib verbose"))
+ self.logger.info(self.vapi.ppcli("show bridge-domain 1 detail"))
+
+ def add_del_arp_term_hosts(self, entries, bd_id=1, is_add=1):
+ for e in entries:
+ self.vapi.bd_ip_mac_add_del(bd_id=bd_id,
+ mac=e.bin_mac,
+ ip=e.ip4n,
+ is_ipv6=0,
+ is_add=is_add)
+
+ @classmethod
+ def mac_list(cls, b6_range):
+ return ["00:00:ca:fe:00:%02x" % b6 for b6 in b6_range]
+
+ @classmethod
+ def ip4_host(cls, subnet, host, mac):
+ return Host(mac=mac,
+ ip4="172.17.1%02u.%u" % (subnet, host))
+
+ @classmethod
+ def ip4_hosts(cls, subnet, start, mac_list):
+ return {cls.ip4_host(subnet, start + j, mac_list[j])
+ for j in range(len(mac_list))}
+
+ @classmethod
+ def bd_swifs(cls, b):
+ n = cls.ifs_per_bd
+ start = (b - 1) * n
+ return [cls.pg_interfaces[j] for j in range(start, start + n)]
+
+ def bd_add_del(self, bd_id=1, is_add=1):
+ if is_add:
+ self.vapi.bridge_domain_add_del(bd_id=bd_id, is_add=is_add)
+ for swif in self.bd_swifs(bd_id):
+ swif_idx = swif.sw_if_index
+ self.vapi.sw_interface_set_l2_bridge(
+ swif_idx, bd_id=bd_id, enable=is_add)
+ if not is_add:
+ self.vapi.bridge_domain_add_del(bd_id=bd_id, is_add=is_add)
+
+ @classmethod
+ def arp(cls, src_host, host):
+ return (Ether(dst="ff:ff:ff:ff:ff:ff", src=src_host.mac) /
+ ARP(op="who-has",
+ hwsrc=src_host.bin_mac,
+ pdst=host.ip4,
+ psrc=src_host.ip4))
+
+ @classmethod
+ def arp_reqs(cls, src_host, entries):
+ return [cls.arp(src_host, e) for e in entries]
+
+ def response_host(self, src_host, arp_resp):
+ ether = arp_resp[Ether]
+ self.assertEqual(ether.dst, src_host.mac)
+
+ arp = arp_resp[ARP]
+ self.assertEqual(arp.hwtype, 1)
+ self.assertEqual(arp.ptype, 0x800)
+ self.assertEqual(arp.hwlen, 6)
+ self.assertEqual(arp.plen, 4)
+ arp_opts = {"who-has": 1, "is-at": 2}
+ self.assertEqual(arp.op, arp_opts["is-at"])
+ self.assertEqual(arp.hwdst, src_host.mac)
+ self.assertEqual(arp.pdst, src_host.ip4)
+ return Host(arp.hwsrc, arp.psrc)
+
+ def arp_resp_hosts(self, src_host, pkts):
+ return {self.response_host(src_host, p) for p in pkts}
+
+ def set_bd_flags(self, bd_id, **args):
+ """
+ Enable/disable defined feature(s) of the bridge domain.
+
+ :param int bd_id: Bridge domain ID.
+ :param list args: List of feature/status pairs. Allowed features: \
+ learn, forward, flood, uu_flood and arp_term. Status False means \
+ disable, status True means enable the feature.
+ :raise: ValueError in case of unknown feature in the input.
+ """
+ for flag in args:
+ if flag == "learn":
+ feature_bitmap = 1 << 0
+ elif flag == "forward":
+ feature_bitmap = 1 << 1
+ elif flag == "flood":
+ feature_bitmap = 1 << 2
+ elif flag == "uu_flood":
+ feature_bitmap = 1 << 3
+ elif flag == "arp_term":
+ feature_bitmap = 1 << 4
+ else:
+ raise ValueError("Unknown feature used: %s" % flag)
+ is_set = 1 if args[flag] else 0
+ self.vapi.bridge_flags(bd_id, is_set, feature_bitmap)
+ self.logger.info("Bridge domain ID %d updated" % bd_id)
+
+ def verify_arp(self, src_host, req_hosts, resp_hosts, bd_id=1):
+ reqs = self.arp_reqs(src_host, req_hosts)
+
+ for swif in self.bd_swifs(bd_id):
+ swif.add_stream(reqs)
+
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ for swif in self.bd_swifs(bd_id):
+ resp_pkts = swif.get_capture(len(resp_hosts))
+ resps = self.arp_resp_hosts(src_host, resp_pkts)
+ self.assertEqual(len(resps ^ resp_hosts), 0)
+
+ def test_l2bd_arp_term_01(self):
+ """ L2BD arp term - add 5 hosts, verify arp responses
+ """
+ src_host = self.ip4_host(50, 50, "00:00:11:22:33:44")
+ self.bd_add_del(1, is_add=1)
+ self.set_bd_flags(1, arp_term=True, flood=False,
+ uu_flood=False, learn=False)
+ macs = self.mac_list(range(1, 5))
+ hosts = self.ip4_hosts(4, 1, macs)
+ self.add_del_arp_term_hosts(hosts, is_add=1)
+ self.verify_arp(src_host, hosts, hosts)
+ type(self).hosts = hosts
+
+ def test_l2bd_arp_term_02(self):
+ """ L2BD arp term - delete 3 hosts, verify arp responses
+ """
+ src_host = self.ip4_host(50, 50, "00:00:11:22:33:44")
+ macs = self.mac_list(range(1, 3))
+ deleted = self.ip4_hosts(4, 1, macs)
+ self.add_del_arp_term_hosts(deleted, is_add=0)
+ remaining = self.hosts - deleted
+ self.verify_arp(src_host, self.hosts, remaining)
+ type(self).hosts = remaining
+ self.bd_add_del(1, is_add=0)
+
+ def test_l2bd_arp_term_03(self):
+ """ L2BD arp term - recreate BD1, readd 3 hosts, verify arp responses
+ """
+ src_host = self.ip4_host(50, 50, "00:00:11:22:33:44")
+ self.bd_add_del(1, is_add=1)
+ self.set_bd_flags(1, arp_term=True, flood=False,
+ uu_flood=False, learn=False)
+ macs = self.mac_list(range(1, 3))
+ readded = self.ip4_hosts(4, 1, macs)
+ self.add_del_arp_term_hosts(readded, is_add=1)
+ self.verify_arp(src_host, self.hosts | readded, readded)
+ type(self).hosts = readded
+
+ def test_l2bd_arp_term_04(self):
+ """ L2BD arp term - 2 IP4 addrs per host
+ """
+ src_host = self.ip4_host(50, 50, "00:00:11:22:33:44")
+ macs = self.mac_list(range(1, 3))
+ sub5_hosts = self.ip4_hosts(5, 1, macs)
+ self.add_del_arp_term_hosts(sub5_hosts, is_add=1)
+ hosts = self.hosts | sub5_hosts
+ self.verify_arp(src_host, hosts, hosts)
+ type(self).hosts = hosts
+ self.bd_add_del(1, is_add=0)
+
+ def test_l2bd_arp_term_05(self):
+ """ L2BD arp term - create and update 10 IP4-mac pairs
+ """
+ src_host = self.ip4_host(50, 50, "00:00:11:22:33:44")
+ self.bd_add_del(1, is_add=1)
+ self.set_bd_flags(1, arp_term=True, flood=False,
+ uu_flood=False, learn=False)
+ macs1 = self.mac_list(range(10, 20))
+ hosts1 = self.ip4_hosts(5, 1, macs1)
+ self.add_del_arp_term_hosts(hosts1, is_add=1)
+ self.verify_arp(src_host, hosts1, hosts1)
+ macs2 = self.mac_list(range(20, 30))
+ hosts2 = self.ip4_hosts(5, 1, macs2)
+ self.add_del_arp_term_hosts(hosts2, is_add=1)
+ self.verify_arp(src_host, hosts1, hosts2)
+ self.bd_add_del(1, is_add=0)
+
+
+if __name__ == '__main__':
+ unittest.main(testRunner=VppTestRunner)