-#!/usr/bin/env python
+#!/usr/bin/env python3
import unittest
+import os
from socket import AF_INET, AF_INET6, inet_pton
from framework import VppTestCase, VppTestRunner
#
self.pg1.generate_remote_hosts(11)
+ #
+ # watch for:
+ # - all neighbour events
+ # - all neighbor events on pg1
+ # - neighbor events for host[1] on pg1
+ #
+ self.vapi.want_ip_neighbor_events(enable=1,
+ pid=os.getpid())
+ self.vapi.want_ip_neighbor_events(enable=1,
+ pid=os.getpid(),
+ sw_if_index=self.pg1.sw_if_index)
+ self.vapi.want_ip_neighbor_events(enable=1,
+ pid=os.getpid(),
+ sw_if_index=self.pg1.sw_if_index,
+ ip=self.pg1.remote_hosts[1].ip4)
+
+ self.logger.info(self.vapi.cli("sh ip neighbor-watcher"))
+
#
# Send IP traffic to one of these unresolved hosts.
# expect the generation of an ARP request
self.pg1.remote_hosts[1].mac,
self.pg1.remote_hosts[1].ip4)
dyn_arp.add_vpp_config()
+ self.assertTrue(dyn_arp.query_vpp_config())
+
+ # this matches all of the listnerers
+ es = [self.vapi.wait_for_event(1, "ip_neighbor_event")
+ for i in range(3)]
+ for e in es:
+ self.assertEqual(str(e.neighbor.ip_address),
+ self.pg1.remote_hosts[1].ip4)
#
# now we expect IP traffic forwarded
self.pg1.remote_hosts[2].ip4,
is_static=1)
static_arp.add_vpp_config()
+ es = [self.vapi.wait_for_event(1, "ip_neighbor_event")
+ for i in range(2)]
+ for e in es:
+ self.assertEqual(str(e.neighbor.ip_address),
+ self.pg1.remote_hosts[2].ip4)
static_p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IP(src=self.pg0.remote_ip4,
self.pg0.remote_ip4,
self.pg1._remote_hosts[2].ip4)
+ #
+ # remove all the listeners
+ #
+ self.vapi.want_ip_neighbor_events(enable=0,
+ pid=os.getpid())
+ self.vapi.want_ip_neighbor_events(enable=0,
+ pid=os.getpid(),
+ sw_if_index=self.pg1.sw_if_index)
+ self.vapi.want_ip_neighbor_events(enable=0,
+ pid=os.getpid(),
+ sw_if_index=self.pg1.sw_if_index,
+ ip=self.pg1.remote_hosts[1].ip4)
+
#
# flap the link. dynamic ARPs get flush, statics don't
#
self.pg1.local_ip4,
self.pg1._remote_hosts[1].ip4)
+ self.assertFalse(dyn_arp.query_vpp_config())
+ self.assertTrue(static_arp.query_vpp_config())
#
# Send an ARP request from one of the so-far unlearned remote hosts
#
#
# cleanup
#
- dyn_arp.remove_vpp_config()
static_arp.remove_vpp_config()
self.pg2.unset_unnumbered(self.pg1.sw_if_index)
dst=self.pg0.local_mac) /
IP(src=self.pg0.remote_ip4, dst="10.0.0.1") /
UDP(sport=1234, dport=1234) /
- Raw('\xa5' * 100))
+ Raw(b'\xa5' * 100))
self.pg0.add_stream(p)
self.pg_enable_capture(self.pg_interfaces)
# clean-up
#
self.pg2.unconfig_ip4()
+ static_arp.remove_vpp_config()
self.pg2.set_table_ip4(0)
def test_arp_incomplete(self):
self.pg0.remote_hosts[1].ip4,
self.pg0.remote_ip4)
+ def test_arp_table_swap(self):
+ #
+ # Generate some hosts on the LAN
+ #
+ N_NBRS = 4
+ self.pg1.generate_remote_hosts(N_NBRS)
+
+ for n in range(N_NBRS):
+ # a route thru each neighbour
+ VppIpRoute(self, "10.0.0.%d" % n, 32,
+ [VppRoutePath(self.pg1.remote_hosts[n].ip4,
+ self.pg1.sw_if_index)]).add_vpp_config()
+
+ # resolve each neighbour
+ p1 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
+ ARP(op="is-at", hwdst=self.pg1.local_mac,
+ hwsrc="00:00:5e:00:01:09", pdst=self.pg1.local_ip4,
+ psrc=self.pg1.remote_hosts[n].ip4))
+
+ self.send_and_assert_no_replies(self.pg1, p1, "ARP reply")
+
+ self.logger.info(self.vapi.cli("sh ip neighbors"))
+
+ #
+ # swap the table pg1 is in
+ #
+ table = VppIpTable(self, 100).add_vpp_config()
+
+ self.pg1.unconfig_ip4()
+ self.pg1.set_table_ip4(100)
+ self.pg1.config_ip4()
+
+ #
+ # all neighbours are cleared
+ #
+ for n in range(N_NBRS):
+ self.assertFalse(find_nbr(self,
+ self.pg1.sw_if_index,
+ self.pg1.remote_hosts[n].ip4))
+
+ #
+ # packets to all neighbours generate ARP requests
+ #
+ for n in range(N_NBRS):
+ # a route thru each neighbour
+ VppIpRoute(self, "10.0.0.%d" % n, 32,
+ [VppRoutePath(self.pg1.remote_hosts[n].ip4,
+ self.pg1.sw_if_index)],
+ table_id=100).add_vpp_config()
+
+ p = (Ether(src=self.pg1.remote_hosts[n].mac,
+ dst=self.pg1.local_mac) /
+ IP(src=self.pg1.remote_hosts[n].ip4,
+ dst="10.0.0.%d" % n) /
+ Raw(b'0x5' * 100))
+ rxs = self.send_and_expect(self.pg1, [p], self.pg1)
+ for rx in rxs:
+ self.verify_arp_req(rx,
+ self.pg1.local_mac,
+ self.pg1.local_ip4,
+ self.pg1.remote_hosts[n].ip4)
+
+ self.pg1.unconfig_ip4()
+ self.pg1.set_table_ip4(0)
+
class NeighborStatsTestCase(VppTestCase):
""" ARP/ND Counters """
self.assertEqual(NUM_PKTS+16, nd1.get_stats()['packets'])
+class NeighborAgeTestCase(VppTestCase):
+ """ ARP/ND Aging """
+
+ @classmethod
+ def setUpClass(cls):
+ super(NeighborAgeTestCase, cls).setUpClass()
+
+ @classmethod
+ def tearDownClass(cls):
+ super(NeighborAgeTestCase, cls).tearDownClass()
+
+ def setUp(self):
+ super(NeighborAgeTestCase, self).setUp()
+
+ self.create_pg_interfaces(range(1))
+
+ # pg0 configured with ip4 and 6 addresses used for input
+ # pg1 configured with ip4 and 6 addresses used for output
+ # pg2 is unnumbered to pg0
+ for i in self.pg_interfaces:
+ i.admin_up()
+ i.config_ip4()
+ i.config_ip6()
+ i.resolve_arp()
+ i.resolve_ndp()
+
+ def tearDown(self):
+ super(NeighborAgeTestCase, self).tearDown()
+
+ for i in self.pg_interfaces:
+ i.unconfig_ip4()
+ i.unconfig_ip6()
+ i.admin_down()
+
+ def wait_for_no_nbr(self, intf, address,
+ n_tries=50, s_time=1):
+ while (n_tries):
+ if not find_nbr(self, intf, address):
+ return True
+ n_tries = n_tries - 1
+ self.sleep(s_time)
+
+ return False
+
+ def verify_arp_req(self, rx, smac, sip, dip):
+ ether = rx[Ether]
+ self.assertEqual(ether.dst, "ff:ff:ff:ff:ff:ff")
+ self.assertEqual(ether.src, smac)
+
+ arp = rx[ARP]
+ self.assertEqual(arp.hwtype, 1)
+ self.assertEqual(arp.ptype, 0x800)
+ self.assertEqual(arp.hwlen, 6)
+ self.assertEqual(arp.plen, 4)
+ self.assertEqual(arp.op, arp_opts["who-has"])
+ self.assertEqual(arp.hwsrc, smac)
+ self.assertEqual(arp.hwdst, "00:00:00:00:00:00")
+ self.assertEqual(arp.psrc, sip)
+ self.assertEqual(arp.pdst, dip)
+
+ def test_age(self):
+ """ Aging/Recycle """
+
+ self.vapi.cli("set logging unthrottle 0")
+ self.vapi.cli("set logging size %d" % 0xffff)
+
+ self.pg0.generate_remote_hosts(201)
+
+ vaf = VppEnum.vl_api_address_family_t
+
+ #
+ # start listening on all interfaces
+ #
+ self.pg_enable_capture(self.pg_interfaces)
+
+ #
+ # Set the neighbor configuration:
+ # limi = 200
+ # age = 0 seconds
+ # recycle = false
+ #
+ self.vapi.ip_neighbor_config(af=vaf.ADDRESS_IP4,
+ max_number=200,
+ max_age=0,
+ recycle=False)
+
+ self.vapi.cli("sh ip neighbor-config")
+
+ # add the 198 neighbours that should pass (-1 for one created in setup)
+ for ii in range(200):
+ VppNeighbor(self,
+ self.pg0.sw_if_index,
+ self.pg0.remote_hosts[ii].mac,
+ self.pg0.remote_hosts[ii].ip4).add_vpp_config()
+
+ # one more neighbor over the limit should fail
+ with self.vapi.assert_negative_api_retval():
+ VppNeighbor(self,
+ self.pg0.sw_if_index,
+ self.pg0.remote_hosts[200].mac,
+ self.pg0.remote_hosts[200].ip4).add_vpp_config()
+
+ #
+ # change the config to allow recycling the old neighbors
+ #
+ self.vapi.ip_neighbor_config(af=vaf.ADDRESS_IP4,
+ max_number=200,
+ max_age=0,
+ recycle=True)
+
+ # now new additions are allowed
+ VppNeighbor(self,
+ self.pg0.sw_if_index,
+ self.pg0.remote_hosts[200].mac,
+ self.pg0.remote_hosts[200].ip4).add_vpp_config()
+
+ # add the first neighbor we configured has been re-used
+ self.assertFalse(find_nbr(self,
+ self.pg0.sw_if_index,
+ self.pg0.remote_hosts[0].ip4))
+ self.assertTrue(find_nbr(self,
+ self.pg0.sw_if_index,
+ self.pg0.remote_hosts[200].ip4))
+
+ #
+ # change the config to age old neighbors
+ #
+ self.vapi.ip_neighbor_config(af=vaf.ADDRESS_IP4,
+ max_number=200,
+ max_age=2,
+ recycle=True)
+
+ self.vapi.cli("sh ip4 neighbor-sorted")
+
+ #
+ # expect probes from all these ARP entries as they age
+ # 3 probes for each neighbor 3*200 = 600
+ rxs = self.pg0.get_capture(600, timeout=8)
+
+ for ii in range(3):
+ for jj in range(200):
+ rx = rxs[ii*200 + jj]
+ # rx.show()
+
+ #
+ # 3 probes sent then 1 more second to see if a reply comes, before
+ # they age out
+ #
+ for jj in range(1, 201):
+ self.wait_for_no_nbr(self.pg0.sw_if_index,
+ self.pg0.remote_hosts[jj].ip4)
+
+ self.assertFalse(self.vapi.ip_neighbor_dump(sw_if_index=0xffffffff,
+ af=vaf.ADDRESS_IP4))
+
+ #
+ # load up some neighbours again with 2s aging enabled
+ # they should be removed after 10s (2s age + 4s for probes + gap)
+ #
+ for ii in range(10):
+ VppNeighbor(self,
+ self.pg0.sw_if_index,
+ self.pg0.remote_hosts[ii].mac,
+ self.pg0.remote_hosts[ii].ip4).add_vpp_config()
+ self.sleep(10)
+ self.assertFalse(self.vapi.ip_neighbor_dump(sw_if_index=0xffffffff,
+ af=vaf.ADDRESS_IP4))
+
+ #
+ # check if we can set age and recycle with empty neighbor list
+ #
+ self.vapi.ip_neighbor_config(af=vaf.ADDRESS_IP4,
+ max_number=200,
+ max_age=1000,
+ recycle=True)
+
+ #
+ # load up some neighbours again, then disable the aging
+ # they should still be there in 10 seconds time
+ #
+ for ii in range(10):
+ VppNeighbor(self,
+ self.pg0.sw_if_index,
+ self.pg0.remote_hosts[ii].mac,
+ self.pg0.remote_hosts[ii].ip4).add_vpp_config()
+ self.vapi.ip_neighbor_config(af=vaf.ADDRESS_IP4,
+ max_number=200,
+ max_age=0,
+ recycle=False)
+
+ self.sleep(10)
+ self.assertTrue(find_nbr(self,
+ self.pg0.sw_if_index,
+ self.pg0.remote_hosts[0].ip4))
+
+
+class NeighborReplaceTestCase(VppTestCase):
+ """ ARP/ND Replacement """
+
+ @classmethod
+ def setUpClass(cls):
+ super(NeighborReplaceTestCase, cls).setUpClass()
+
+ @classmethod
+ def tearDownClass(cls):
+ super(NeighborReplaceTestCase, cls).tearDownClass()
+
+ def setUp(self):
+ super(NeighborReplaceTestCase, self).setUp()
+
+ self.create_pg_interfaces(range(4))
+
+ # pg0 configured with ip4 and 6 addresses used for input
+ # pg1 configured with ip4 and 6 addresses used for output
+ # pg2 is unnumbered to pg0
+ for i in self.pg_interfaces:
+ i.admin_up()
+ i.config_ip4()
+ i.config_ip6()
+ i.resolve_arp()
+ i.resolve_ndp()
+
+ def tearDown(self):
+ super(NeighborReplaceTestCase, self).tearDown()
+
+ for i in self.pg_interfaces:
+ i.unconfig_ip4()
+ i.unconfig_ip6()
+ i.admin_down()
+
+ def test_replace(self):
+ """ replace """
+
+ N_HOSTS = 16
+
+ for i in self.pg_interfaces:
+ i.generate_remote_hosts(N_HOSTS)
+ i.configure_ipv4_neighbors()
+ i.configure_ipv6_neighbors()
+
+ # replace them all
+ self.vapi.ip_neighbor_replace_begin()
+ self.vapi.ip_neighbor_replace_end()
+
+ for i in self.pg_interfaces:
+ for h in range(N_HOSTS):
+ self.assertFalse(find_nbr(self,
+ self.pg0.sw_if_index,
+ self.pg0.remote_hosts[h].ip4))
+ self.assertFalse(find_nbr(self,
+ self.pg0.sw_if_index,
+ self.pg0.remote_hosts[h].ip6))
+
+ #
+ # and them all back via the API
+ #
+ for i in self.pg_interfaces:
+ for h in range(N_HOSTS):
+ VppNeighbor(self,
+ i.sw_if_index,
+ i.remote_hosts[h].mac,
+ i.remote_hosts[h].ip4).add_vpp_config()
+ VppNeighbor(self,
+ i.sw_if_index,
+ i.remote_hosts[h].mac,
+ i.remote_hosts[h].ip6).add_vpp_config()
+
+ #
+ # begin the replacement again, this time touch some
+ # the neighbours on pg1 so they are not deleted
+ #
+ self.vapi.ip_neighbor_replace_begin()
+
+ # update from the API all neighbours on pg1
+ for h in range(N_HOSTS):
+ VppNeighbor(self,
+ self.pg1.sw_if_index,
+ self.pg1.remote_hosts[h].mac,
+ self.pg1.remote_hosts[h].ip4).add_vpp_config()
+ VppNeighbor(self,
+ self.pg1.sw_if_index,
+ self.pg1.remote_hosts[h].mac,
+ self.pg1.remote_hosts[h].ip6).add_vpp_config()
+
+ # update from the data-plane all neighbours on pg3
+ self.pg3.configure_ipv4_neighbors()
+ self.pg3.configure_ipv6_neighbors()
+
+ # complete the replacement
+ self.logger.info(self.vapi.cli("sh ip neighbors"))
+ self.vapi.ip_neighbor_replace_end()
+
+ for i in self.pg_interfaces:
+ if i == self.pg1 or i == self.pg3:
+ # neighbours on pg1 and pg3 are still present
+ for h in range(N_HOSTS):
+ self.assertTrue(find_nbr(self,
+ i.sw_if_index,
+ i.remote_hosts[h].ip4))
+ self.assertTrue(find_nbr(self,
+ i.sw_if_index,
+ i.remote_hosts[h].ip6))
+ else:
+ # all other neighbours are toast
+ for h in range(N_HOSTS):
+ self.assertFalse(find_nbr(self,
+ i.sw_if_index,
+ i.remote_hosts[h].ip4))
+ self.assertFalse(find_nbr(self,
+ i.sw_if_index,
+ i.remote_hosts[h].ip6))
+
+
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
Code Review / vpp.git / blobdiff