| #!/usr/bin/env python3 |
| |
| import unittest |
| import os |
| from socket import AF_INET, AF_INET6, inet_pton |
| |
| from framework import VppTestCase, VppTestRunner |
| from vpp_neighbor import VppNeighbor, find_nbr |
| from vpp_ip_route import VppIpRoute, VppRoutePath, find_route, \ |
| VppIpTable, DpoProto, FibPathType |
| from vpp_papi import VppEnum |
| |
| import scapy.compat |
| from scapy.packet import Raw |
| from scapy.layers.l2 import Ether, ARP, Dot1Q |
| from scapy.layers.inet import IP, UDP |
| from scapy.layers.inet6 import IPv6 |
| from scapy.contrib.mpls import MPLS |
| from scapy.layers.inet6 import IPv6 |
| |
| |
| NUM_PKTS = 67 |
| |
| # not exported by scapy, so redefined here |
| arp_opts = {"who-has": 1, "is-at": 2} |
| |
| |
| class ARPTestCase(VppTestCase): |
| """ ARP Test Case """ |
| |
| @classmethod |
| def setUpClass(cls): |
| super(ARPTestCase, cls).setUpClass() |
| |
| @classmethod |
| def tearDownClass(cls): |
| super(ARPTestCase, cls).tearDownClass() |
| |
| def setUp(self): |
| super(ARPTestCase, self).setUp() |
| |
| # create 3 pg interfaces |
| 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() |
| |
| self.pg0.config_ip4() |
| self.pg0.config_ip6() |
| self.pg0.resolve_arp() |
| |
| self.pg1.config_ip4() |
| self.pg1.config_ip6() |
| |
| # pg3 in a different VRF |
| self.tbl = VppIpTable(self, 1) |
| self.tbl.add_vpp_config() |
| |
| self.pg3.set_table_ip4(1) |
| self.pg3.config_ip4() |
| |
| def tearDown(self): |
| self.pg0.unconfig_ip4() |
| self.pg0.unconfig_ip6() |
| |
| self.pg1.unconfig_ip4() |
| self.pg1.unconfig_ip6() |
| |
| self.pg3.unconfig_ip4() |
| self.pg3.set_table_ip4(0) |
| |
| for i in self.pg_interfaces: |
| i.admin_down() |
| |
| super(ARPTestCase, self).tearDown() |
| |
| 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 verify_arp_resp(self, rx, smac, dmac, sip, dip): |
| ether = rx[Ether] |
| self.assertEqual(ether.dst, dmac) |
| 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["is-at"]) |
| self.assertEqual(arp.hwsrc, smac) |
| self.assertEqual(arp.hwdst, dmac) |
| self.assertEqual(arp.psrc, sip) |
| self.assertEqual(arp.pdst, dip) |
| |
| def verify_arp_vrrp_resp(self, rx, smac, dmac, sip, dip): |
| ether = rx[Ether] |
| self.assertEqual(ether.dst, dmac) |
| 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["is-at"]) |
| self.assertNotEqual(arp.hwsrc, smac) |
| self.assertTrue("00:00:5e:00:01" in arp.hwsrc or |
| "00:00:5E:00:01" in arp.hwsrc) |
| self.assertEqual(arp.hwdst, dmac) |
| self.assertEqual(arp.psrc, sip) |
| self.assertEqual(arp.pdst, dip) |
| |
| def verify_ip(self, rx, smac, dmac, sip, dip): |
| ether = rx[Ether] |
| self.assertEqual(ether.dst, dmac) |
| self.assertEqual(ether.src, smac) |
| |
| ip = rx[IP] |
| self.assertEqual(ip.src, sip) |
| self.assertEqual(ip.dst, dip) |
| |
| def verify_ip_o_mpls(self, rx, smac, dmac, label, sip, dip): |
| ether = rx[Ether] |
| self.assertEqual(ether.dst, dmac) |
| self.assertEqual(ether.src, smac) |
| |
| mpls = rx[MPLS] |
| self.assertTrue(mpls.label, label) |
| |
| ip = rx[IP] |
| self.assertEqual(ip.src, sip) |
| self.assertEqual(ip.dst, dip) |
| |
| def test_arp(self): |
| """ ARP """ |
| |
| # |
| # Generate some hosts on the LAN |
| # |
| 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 |
| # |
| p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / |
| IP(src=self.pg0.remote_ip4, dst=self.pg1._remote_hosts[1].ip4) / |
| UDP(sport=1234, dport=1234) / |
| Raw()) |
| |
| self.pg0.add_stream(p) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx = self.pg1.get_capture(1) |
| |
| self.verify_arp_req(rx[0], |
| self.pg1.local_mac, |
| self.pg1.local_ip4, |
| self.pg1._remote_hosts[1].ip4) |
| |
| # |
| # And a dynamic ARP entry for host 1 |
| # |
| dyn_arp = VppNeighbor(self, |
| self.pg1.sw_if_index, |
| 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 |
| # |
| dyn_p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / |
| IP(src=self.pg0.remote_ip4, |
| dst=self.pg1._remote_hosts[1].ip4) / |
| UDP(sport=1234, dport=1234) / |
| Raw()) |
| |
| self.pg0.add_stream(dyn_p) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx = self.pg1.get_capture(1) |
| |
| self.verify_ip(rx[0], |
| self.pg1.local_mac, |
| self.pg1.remote_hosts[1].mac, |
| self.pg0.remote_ip4, |
| self.pg1._remote_hosts[1].ip4) |
| |
| # |
| # And a Static ARP entry for host 2 |
| # |
| static_arp = VppNeighbor(self, |
| self.pg1.sw_if_index, |
| self.pg1.remote_hosts[2].mac, |
| 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, |
| dst=self.pg1._remote_hosts[2].ip4) / |
| UDP(sport=1234, dport=1234) / |
| Raw()) |
| |
| self.pg0.add_stream(static_p) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx = self.pg1.get_capture(1) |
| |
| self.verify_ip(rx[0], |
| self.pg1.local_mac, |
| self.pg1.remote_hosts[2].mac, |
| 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.admin_down() |
| self.pg1.admin_up() |
| |
| self.pg0.add_stream(static_p) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| rx = self.pg1.get_capture(1) |
| |
| self.verify_ip(rx[0], |
| self.pg1.local_mac, |
| self.pg1.remote_hosts[2].mac, |
| self.pg0.remote_ip4, |
| self.pg1._remote_hosts[2].ip4) |
| |
| self.pg0.add_stream(dyn_p) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx = self.pg1.get_capture(1) |
| self.verify_arp_req(rx[0], |
| self.pg1.local_mac, |
| 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 |
| # |
| p = (Ether(dst="ff:ff:ff:ff:ff:ff", |
| src=self.pg1._remote_hosts[3].mac) / |
| ARP(op="who-has", |
| hwsrc=self.pg1._remote_hosts[3].mac, |
| pdst=self.pg1.local_ip4, |
| psrc=self.pg1._remote_hosts[3].ip4)) |
| |
| self.pg1.add_stream(p) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx = self.pg1.get_capture(1) |
| self.verify_arp_resp(rx[0], |
| self.pg1.local_mac, |
| self.pg1._remote_hosts[3].mac, |
| self.pg1.local_ip4, |
| self.pg1._remote_hosts[3].ip4) |
| |
| # |
| # VPP should have learned the mapping for the remote host |
| # |
| self.assertTrue(find_nbr(self, |
| self.pg1.sw_if_index, |
| self.pg1._remote_hosts[3].ip4)) |
| # |
| # Fire in an ARP request before the interface becomes IP enabled |
| # |
| self.pg2.generate_remote_hosts(4) |
| |
| p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg2.remote_mac) / |
| ARP(op="who-has", |
| hwsrc=self.pg2.remote_mac, |
| pdst=self.pg1.local_ip4, |
| psrc=self.pg2.remote_hosts[3].ip4)) |
| pt = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg2.remote_mac) / |
| Dot1Q(vlan=0) / |
| ARP(op="who-has", |
| hwsrc=self.pg2.remote_mac, |
| pdst=self.pg1.local_ip4, |
| psrc=self.pg2.remote_hosts[3].ip4)) |
| self.send_and_assert_no_replies(self.pg2, p, |
| "interface not IP enabled") |
| |
| # |
| # Make pg2 un-numbered to pg1 |
| # |
| self.pg2.set_unnumbered(self.pg1.sw_if_index) |
| |
| # |
| # test the unnumbered dump both by all interfaces and just the enabled |
| # one |
| # |
| unnum = self.vapi.ip_unnumbered_dump() |
| self.assertTrue(len(unnum)) |
| self.assertEqual(unnum[0].ip_sw_if_index, self.pg1.sw_if_index) |
| self.assertEqual(unnum[0].sw_if_index, self.pg2.sw_if_index) |
| unnum = self.vapi.ip_unnumbered_dump(self.pg2.sw_if_index) |
| self.assertTrue(len(unnum)) |
| self.assertEqual(unnum[0].ip_sw_if_index, self.pg1.sw_if_index) |
| self.assertEqual(unnum[0].sw_if_index, self.pg2.sw_if_index) |
| |
| # |
| # We should respond to ARP requests for the unnumbered to address |
| # once an attached route to the source is known |
| # |
| self.send_and_assert_no_replies( |
| self.pg2, p, |
| "ARP req for unnumbered address - no source") |
| |
| attached_host = VppIpRoute(self, self.pg2.remote_hosts[3].ip4, 32, |
| [VppRoutePath("0.0.0.0", |
| self.pg2.sw_if_index)]) |
| attached_host.add_vpp_config() |
| |
| self.pg2.add_stream(p) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx = self.pg2.get_capture(1) |
| self.verify_arp_resp(rx[0], |
| self.pg2.local_mac, |
| self.pg2.remote_mac, |
| self.pg1.local_ip4, |
| self.pg2.remote_hosts[3].ip4) |
| |
| self.pg2.add_stream(pt) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx = self.pg2.get_capture(1) |
| self.verify_arp_resp(rx[0], |
| self.pg2.local_mac, |
| self.pg2.remote_mac, |
| self.pg1.local_ip4, |
| self.pg2.remote_hosts[3].ip4) |
| |
| # |
| # A neighbor entry that has no associated FIB-entry |
| # |
| arp_no_fib = VppNeighbor(self, |
| self.pg1.sw_if_index, |
| self.pg1.remote_hosts[4].mac, |
| self.pg1.remote_hosts[4].ip4, |
| is_no_fib_entry=1) |
| arp_no_fib.add_vpp_config() |
| |
| # |
| # check we have the neighbor, but no route |
| # |
| self.assertTrue(find_nbr(self, |
| self.pg1.sw_if_index, |
| self.pg1._remote_hosts[4].ip4)) |
| self.assertFalse(find_route(self, |
| self.pg1._remote_hosts[4].ip4, |
| 32)) |
| # |
| # pg2 is unnumbered to pg1, so we can form adjacencies out of pg2 |
| # from within pg1's subnet |
| # |
| arp_unnum = VppNeighbor(self, |
| self.pg2.sw_if_index, |
| self.pg1.remote_hosts[5].mac, |
| self.pg1.remote_hosts[5].ip4) |
| arp_unnum.add_vpp_config() |
| |
| p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / |
| IP(src=self.pg0.remote_ip4, |
| dst=self.pg1._remote_hosts[5].ip4) / |
| UDP(sport=1234, dport=1234) / |
| Raw()) |
| |
| self.pg0.add_stream(p) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx = self.pg2.get_capture(1) |
| |
| self.verify_ip(rx[0], |
| self.pg2.local_mac, |
| self.pg1.remote_hosts[5].mac, |
| self.pg0.remote_ip4, |
| self.pg1._remote_hosts[5].ip4) |
| |
| # |
| # ARP requests from hosts in pg1's subnet sent on pg2 are replied to |
| # with the unnumbered interface's address as the source |
| # |
| p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg2.remote_mac) / |
| ARP(op="who-has", |
| hwsrc=self.pg2.remote_mac, |
| pdst=self.pg1.local_ip4, |
| psrc=self.pg1.remote_hosts[6].ip4)) |
| |
| self.pg2.add_stream(p) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx = self.pg2.get_capture(1) |
| self.verify_arp_resp(rx[0], |
| self.pg2.local_mac, |
| self.pg2.remote_mac, |
| self.pg1.local_ip4, |
| self.pg1.remote_hosts[6].ip4) |
| |
| # |
| # An attached host route out of pg2 for an undiscovered hosts generates |
| # an ARP request with the unnumbered address as the source |
| # |
| att_unnum = VppIpRoute(self, self.pg1.remote_hosts[7].ip4, 32, |
| [VppRoutePath("0.0.0.0", |
| self.pg2.sw_if_index)]) |
| att_unnum.add_vpp_config() |
| |
| p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / |
| IP(src=self.pg0.remote_ip4, |
| dst=self.pg1._remote_hosts[7].ip4) / |
| UDP(sport=1234, dport=1234) / |
| Raw()) |
| |
| self.pg0.add_stream(p) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx = self.pg2.get_capture(1) |
| |
| self.verify_arp_req(rx[0], |
| self.pg2.local_mac, |
| self.pg1.local_ip4, |
| self.pg1._remote_hosts[7].ip4) |
| |
| p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg2.remote_mac) / |
| ARP(op="who-has", |
| hwsrc=self.pg2.remote_mac, |
| pdst=self.pg1.local_ip4, |
| psrc=self.pg1.remote_hosts[7].ip4)) |
| |
| self.pg2.add_stream(p) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx = self.pg2.get_capture(1) |
| self.verify_arp_resp(rx[0], |
| self.pg2.local_mac, |
| self.pg2.remote_mac, |
| self.pg1.local_ip4, |
| self.pg1.remote_hosts[7].ip4) |
| |
| # |
| # An attached host route as yet unresolved out of pg2 for an |
| # undiscovered host, an ARP requests begets a response. |
| # |
| att_unnum1 = VppIpRoute(self, self.pg1.remote_hosts[8].ip4, 32, |
| [VppRoutePath("0.0.0.0", |
| self.pg2.sw_if_index)]) |
| att_unnum1.add_vpp_config() |
| |
| p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg2.remote_mac) / |
| ARP(op="who-has", |
| hwsrc=self.pg2.remote_mac, |
| pdst=self.pg1.local_ip4, |
| psrc=self.pg1.remote_hosts[8].ip4)) |
| |
| self.pg2.add_stream(p) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx = self.pg2.get_capture(1) |
| self.verify_arp_resp(rx[0], |
| self.pg2.local_mac, |
| self.pg2.remote_mac, |
| self.pg1.local_ip4, |
| self.pg1.remote_hosts[8].ip4) |
| |
| # |
| # Send an ARP request from one of the so-far unlearned remote hosts |
| # with a VLAN0 tag |
| # |
| p = (Ether(dst="ff:ff:ff:ff:ff:ff", |
| src=self.pg1._remote_hosts[9].mac) / |
| Dot1Q(vlan=0) / |
| ARP(op="who-has", |
| hwsrc=self.pg1._remote_hosts[9].mac, |
| pdst=self.pg1.local_ip4, |
| psrc=self.pg1._remote_hosts[9].ip4)) |
| |
| self.pg1.add_stream(p) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx = self.pg1.get_capture(1) |
| self.verify_arp_resp(rx[0], |
| self.pg1.local_mac, |
| self.pg1._remote_hosts[9].mac, |
| self.pg1.local_ip4, |
| self.pg1._remote_hosts[9].ip4) |
| |
| # |
| # Add a hierarchy of routes for a host in the sub-net. |
| # Should still get an ARP resp since the cover is attached |
| # |
| p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg1.remote_mac) / |
| ARP(op="who-has", |
| hwsrc=self.pg1.remote_mac, |
| pdst=self.pg1.local_ip4, |
| psrc=self.pg1.remote_hosts[10].ip4)) |
| |
| r1 = VppIpRoute(self, self.pg1.remote_hosts[10].ip4, 30, |
| [VppRoutePath(self.pg1.remote_hosts[10].ip4, |
| self.pg1.sw_if_index)]) |
| r1.add_vpp_config() |
| |
| self.pg1.add_stream(p) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| rx = self.pg1.get_capture(1) |
| self.verify_arp_resp(rx[0], |
| self.pg1.local_mac, |
| self.pg1.remote_mac, |
| self.pg1.local_ip4, |
| self.pg1.remote_hosts[10].ip4) |
| |
| r2 = VppIpRoute(self, self.pg1.remote_hosts[10].ip4, 32, |
| [VppRoutePath(self.pg1.remote_hosts[10].ip4, |
| self.pg1.sw_if_index)]) |
| r2.add_vpp_config() |
| |
| self.pg1.add_stream(p) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| rx = self.pg1.get_capture(1) |
| self.verify_arp_resp(rx[0], |
| self.pg1.local_mac, |
| self.pg1.remote_mac, |
| self.pg1.local_ip4, |
| self.pg1.remote_hosts[10].ip4) |
| |
| # |
| # add an ARP entry that's not on the sub-net and so whose |
| # adj-fib fails the refinement check. then send an ARP request |
| # from that source |
| # |
| a1 = VppNeighbor(self, |
| self.pg0.sw_if_index, |
| self.pg0.remote_mac, |
| "100.100.100.50") |
| a1.add_vpp_config() |
| |
| p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg0.remote_mac) / |
| ARP(op="who-has", |
| hwsrc=self.pg0.remote_mac, |
| psrc="100.100.100.50", |
| pdst=self.pg0.remote_ip4)) |
| self.send_and_assert_no_replies(self.pg0, p, |
| "ARP req for from failed adj-fib") |
| |
| # |
| # ERROR Cases |
| # 1 - don't respond to ARP request for address not within the |
| # interface's sub-net |
| # 1b - nor within the unnumbered subnet |
| # 1c - nor within the subnet of a different interface |
| # |
| p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg0.remote_mac) / |
| ARP(op="who-has", |
| hwsrc=self.pg0.remote_mac, |
| pdst="10.10.10.3", |
| psrc=self.pg0.remote_ip4)) |
| self.send_and_assert_no_replies(self.pg0, p, |
| "ARP req for non-local destination") |
| self.assertFalse(find_nbr(self, |
| self.pg0.sw_if_index, |
| "10.10.10.3")) |
| |
| p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg2.remote_mac) / |
| ARP(op="who-has", |
| hwsrc=self.pg2.remote_mac, |
| pdst="10.10.10.3", |
| psrc=self.pg1.remote_hosts[7].ip4)) |
| self.send_and_assert_no_replies( |
| self.pg0, p, |
| "ARP req for non-local destination - unnum") |
| |
| p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg0.remote_mac) / |
| ARP(op="who-has", |
| hwsrc=self.pg0.remote_mac, |
| pdst=self.pg1.local_ip4, |
| psrc=self.pg1.remote_ip4)) |
| self.send_and_assert_no_replies(self.pg0, p, |
| "ARP req diff sub-net") |
| self.assertFalse(find_nbr(self, |
| self.pg0.sw_if_index, |
| self.pg1.remote_ip4)) |
| |
| # |
| # 2 - don't respond to ARP request from an address not within the |
| # interface's sub-net |
| # 2b - to a proxied address |
| # 2c - not within a different interface's sub-net |
| p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg0.remote_mac) / |
| ARP(op="who-has", |
| hwsrc=self.pg0.remote_mac, |
| psrc="10.10.10.3", |
| pdst=self.pg0.local_ip4)) |
| self.send_and_assert_no_replies(self.pg0, p, |
| "ARP req for non-local source") |
| p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg2.remote_mac) / |
| ARP(op="who-has", |
| hwsrc=self.pg2.remote_mac, |
| psrc="10.10.10.3", |
| pdst=self.pg0.local_ip4)) |
| self.send_and_assert_no_replies( |
| self.pg0, p, |
| "ARP req for non-local source - unnum") |
| p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg0.remote_mac) / |
| ARP(op="who-has", |
| hwsrc=self.pg0.remote_mac, |
| psrc=self.pg1.remote_ip4, |
| pdst=self.pg0.local_ip4)) |
| self.send_and_assert_no_replies(self.pg0, p, |
| "ARP req for non-local source 2c") |
| |
| # |
| # 3 - don't respond to ARP request from an address that belongs to |
| # the router |
| # |
| p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg0.remote_mac) / |
| ARP(op="who-has", |
| hwsrc=self.pg0.remote_mac, |
| psrc=self.pg0.local_ip4, |
| pdst=self.pg0.local_ip4)) |
| self.send_and_assert_no_replies(self.pg0, p, |
| "ARP req for non-local source") |
| |
| # |
| # 4 - don't respond to ARP requests that has mac source different |
| # from ARP request HW source |
| # |
| p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg0.remote_mac) / |
| ARP(op="who-has", |
| hwsrc="00:00:00:DE:AD:BE", |
| psrc=self.pg0.remote_ip4, |
| pdst=self.pg0.local_ip4)) |
| self.send_and_assert_no_replies(self.pg0, p, |
| "ARP req for non-local source") |
| |
| # |
| # 5 - don't respond to ARP requests for address within the |
| # interface's sub-net but not the interface's address |
| # |
| self.pg0.generate_remote_hosts(2) |
| p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg0.remote_mac) / |
| ARP(op="who-has", |
| hwsrc=self.pg0.remote_mac, |
| psrc=self.pg0.remote_hosts[0].ip4, |
| pdst=self.pg0.remote_hosts[1].ip4)) |
| self.send_and_assert_no_replies(self.pg0, p, |
| "ARP req for non-local destination") |
| |
| # |
| # cleanup |
| # |
| static_arp.remove_vpp_config() |
| self.pg2.unset_unnumbered(self.pg1.sw_if_index) |
| |
| # need this to flush the adj-fibs |
| self.pg2.unset_unnumbered(self.pg1.sw_if_index) |
| self.pg2.admin_down() |
| self.pg1.admin_down() |
| |
| def test_proxy_mirror_arp(self): |
| """ Interface Mirror Proxy ARP """ |
| |
| # |
| # When VPP has an interface whose address is also applied to a TAP |
| # interface on the host, then VPP's TAP interface will be unnumbered |
| # to the 'real' interface and do proxy ARP from the host. |
| # the curious aspect of this setup is that ARP requests from the host |
| # will come from the VPP's own address. |
| # |
| self.pg0.generate_remote_hosts(2) |
| |
| arp_req_from_me = (Ether(src=self.pg2.remote_mac, |
| dst="ff:ff:ff:ff:ff:ff") / |
| ARP(op="who-has", |
| hwsrc=self.pg2.remote_mac, |
| pdst=self.pg0.remote_hosts[1].ip4, |
| psrc=self.pg0.local_ip4)) |
| |
| # |
| # Configure Proxy ARP for the subnet on PG0addresses on pg0 |
| # |
| self.vapi.proxy_arp_add_del(self.pg0._local_ip4_subnet, |
| self.pg0._local_ip4_bcast) |
| |
| # Make pg2 un-numbered to pg0 |
| # |
| self.pg2.set_unnumbered(self.pg0.sw_if_index) |
| |
| # |
| # Enable pg2 for proxy ARP |
| # |
| self.pg2.set_proxy_arp() |
| |
| # |
| # Send the ARP request with an originating address that |
| # is VPP's own address |
| # |
| self.pg2.add_stream(arp_req_from_me) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx = self.pg2.get_capture(1) |
| self.verify_arp_resp(rx[0], |
| self.pg2.local_mac, |
| self.pg2.remote_mac, |
| self.pg0.remote_hosts[1].ip4, |
| self.pg0.local_ip4) |
| |
| # |
| # validate we have not learned an ARP entry as a result of this |
| # |
| self.assertFalse(find_nbr(self, |
| self.pg2.sw_if_index, |
| self.pg0.local_ip4)) |
| |
| # |
| # cleanup |
| # |
| self.pg2.set_proxy_arp(0) |
| self.vapi.proxy_arp_add_del(self.pg0._local_ip4_subnet, |
| self.pg0._local_ip4_bcast, |
| is_add=0) |
| |
| def test_proxy_arp(self): |
| """ Proxy ARP """ |
| |
| self.pg1.generate_remote_hosts(2) |
| |
| # |
| # Proxy ARP request packets for each interface |
| # |
| arp_req_pg0 = (Ether(src=self.pg0.remote_mac, |
| dst="ff:ff:ff:ff:ff:ff") / |
| ARP(op="who-has", |
| hwsrc=self.pg0.remote_mac, |
| pdst="10.10.10.3", |
| psrc=self.pg0.remote_ip4)) |
| arp_req_pg0_tagged = (Ether(src=self.pg0.remote_mac, |
| dst="ff:ff:ff:ff:ff:ff") / |
| Dot1Q(vlan=0) / |
| ARP(op="who-has", |
| hwsrc=self.pg0.remote_mac, |
| pdst="10.10.10.3", |
| psrc=self.pg0.remote_ip4)) |
| arp_req_pg1 = (Ether(src=self.pg1.remote_mac, |
| dst="ff:ff:ff:ff:ff:ff") / |
| ARP(op="who-has", |
| hwsrc=self.pg1.remote_mac, |
| pdst="10.10.10.3", |
| psrc=self.pg1.remote_ip4)) |
| arp_req_pg2 = (Ether(src=self.pg2.remote_mac, |
| dst="ff:ff:ff:ff:ff:ff") / |
| ARP(op="who-has", |
| hwsrc=self.pg2.remote_mac, |
| pdst="10.10.10.3", |
| psrc=self.pg1.remote_hosts[1].ip4)) |
| arp_req_pg3 = (Ether(src=self.pg3.remote_mac, |
| dst="ff:ff:ff:ff:ff:ff") / |
| ARP(op="who-has", |
| hwsrc=self.pg3.remote_mac, |
| pdst="10.10.10.3", |
| psrc=self.pg3.remote_ip4)) |
| |
| # |
| # Configure Proxy ARP for 10.10.10.0 -> 10.10.10.124 |
| # |
| self.vapi.proxy_arp_add_del(inet_pton(AF_INET, "10.10.10.2"), |
| inet_pton(AF_INET, "10.10.10.124")) |
| |
| # |
| # No responses are sent when the interfaces are not enabled for proxy |
| # ARP |
| # |
| self.send_and_assert_no_replies(self.pg0, arp_req_pg0, |
| "ARP req from unconfigured interface") |
| self.send_and_assert_no_replies(self.pg2, arp_req_pg2, |
| "ARP req from unconfigured interface") |
| |
| # |
| # Make pg2 un-numbered to pg1 |
| # still won't reply. |
| # |
| self.pg2.set_unnumbered(self.pg1.sw_if_index) |
| |
| self.send_and_assert_no_replies(self.pg2, arp_req_pg2, |
| "ARP req from unnumbered interface") |
| |
| # |
| # Enable each interface to reply to proxy ARPs |
| # |
| for i in self.pg_interfaces: |
| i.set_proxy_arp() |
| |
| # |
| # Now each of the interfaces should reply to a request to a proxied |
| # address |
| # |
| self.pg0.add_stream(arp_req_pg0) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx = self.pg0.get_capture(1) |
| self.verify_arp_resp(rx[0], |
| self.pg0.local_mac, |
| self.pg0.remote_mac, |
| "10.10.10.3", |
| self.pg0.remote_ip4) |
| |
| self.pg0.add_stream(arp_req_pg0_tagged) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx = self.pg0.get_capture(1) |
| self.verify_arp_resp(rx[0], |
| self.pg0.local_mac, |
| self.pg0.remote_mac, |
| "10.10.10.3", |
| self.pg0.remote_ip4) |
| |
| self.pg1.add_stream(arp_req_pg1) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx = self.pg1.get_capture(1) |
| self.verify_arp_resp(rx[0], |
| self.pg1.local_mac, |
| self.pg1.remote_mac, |
| "10.10.10.3", |
| self.pg1.remote_ip4) |
| |
| self.pg2.add_stream(arp_req_pg2) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx = self.pg2.get_capture(1) |
| self.verify_arp_resp(rx[0], |
| self.pg2.local_mac, |
| self.pg2.remote_mac, |
| "10.10.10.3", |
| self.pg1.remote_hosts[1].ip4) |
| |
| # |
| # A request for an address out of the configured range |
| # |
| arp_req_pg1_hi = (Ether(src=self.pg1.remote_mac, |
| dst="ff:ff:ff:ff:ff:ff") / |
| ARP(op="who-has", |
| hwsrc=self.pg1.remote_mac, |
| pdst="10.10.10.125", |
| psrc=self.pg1.remote_ip4)) |
| self.send_and_assert_no_replies(self.pg1, arp_req_pg1_hi, |
| "ARP req out of range HI") |
| arp_req_pg1_low = (Ether(src=self.pg1.remote_mac, |
| dst="ff:ff:ff:ff:ff:ff") / |
| ARP(op="who-has", |
| hwsrc=self.pg1.remote_mac, |
| pdst="10.10.10.1", |
| psrc=self.pg1.remote_ip4)) |
| self.send_and_assert_no_replies(self.pg1, arp_req_pg1_low, |
| "ARP req out of range Low") |
| |
| # |
| # Request for an address in the proxy range but from an interface |
| # in a different VRF |
| # |
| self.send_and_assert_no_replies(self.pg3, arp_req_pg3, |
| "ARP req from different VRF") |
| |
| # |
| # Disable Each interface for proxy ARP |
| # - expect none to respond |
| # |
| for i in self.pg_interfaces: |
| i.set_proxy_arp(0) |
| |
| self.send_and_assert_no_replies(self.pg0, arp_req_pg0, |
| "ARP req from disable") |
| self.send_and_assert_no_replies(self.pg1, arp_req_pg1, |
| "ARP req from disable") |
| self.send_and_assert_no_replies(self.pg2, arp_req_pg2, |
| "ARP req from disable") |
| |
| # |
| # clean up on interface 2 |
| # |
| self.pg2.unset_unnumbered(self.pg1.sw_if_index) |
| |
| def test_mpls(self): |
| """ MPLS """ |
| |
| # |
| # Interface 2 does not yet have ip4 config |
| # |
| self.pg2.config_ip4() |
| self.pg2.generate_remote_hosts(2) |
| |
| # |
| # Add a route with out going label via an ARP unresolved next-hop |
| # |
| ip_10_0_0_1 = VppIpRoute(self, "10.0.0.1", 32, |
| [VppRoutePath(self.pg2.remote_hosts[1].ip4, |
| self.pg2.sw_if_index, |
| labels=[55])]) |
| ip_10_0_0_1.add_vpp_config() |
| |
| # |
| # packets should generate an ARP request |
| # |
| p = (Ether(src=self.pg0.remote_mac, |
| dst=self.pg0.local_mac) / |
| IP(src=self.pg0.remote_ip4, dst="10.0.0.1") / |
| UDP(sport=1234, dport=1234) / |
| Raw(b'\xa5' * 100)) |
| |
| self.pg0.add_stream(p) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx = self.pg2.get_capture(1) |
| self.verify_arp_req(rx[0], |
| self.pg2.local_mac, |
| self.pg2.local_ip4, |
| self.pg2._remote_hosts[1].ip4) |
| |
| # |
| # now resolve the neighbours |
| # |
| self.pg2.configure_ipv4_neighbors() |
| |
| # |
| # Now packet should be properly MPLS encapped. |
| # This verifies that MPLS link-type adjacencies are completed |
| # when the ARP entry resolves |
| # |
| self.pg0.add_stream(p) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx = self.pg2.get_capture(1) |
| self.verify_ip_o_mpls(rx[0], |
| self.pg2.local_mac, |
| self.pg2.remote_hosts[1].mac, |
| 55, |
| self.pg0.remote_ip4, |
| "10.0.0.1") |
| self.pg2.unconfig_ip4() |
| |
| def test_arp_vrrp(self): |
| """ ARP reply with VRRP virtual src hw addr """ |
| |
| # |
| # IP packet destined for pg1 remote host arrives on pg0 resulting |
| # in an ARP request for the address of the remote host on pg1 |
| # |
| p0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / |
| IP(src=self.pg0.remote_ip4, dst=self.pg1.remote_ip4) / |
| UDP(sport=1234, dport=1234) / |
| Raw()) |
| |
| rx1 = self.send_and_expect(self.pg0, [p0], self.pg1) |
| |
| self.verify_arp_req(rx1[0], |
| self.pg1.local_mac, |
| self.pg1.local_ip4, |
| self.pg1.remote_ip4) |
| |
| # |
| # ARP reply for address of pg1 remote host arrives on pg1 with |
| # the hw src addr set to a value in the VRRP IPv4 range of |
| # MAC addresses |
| # |
| 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_ip4)) |
| |
| self.send_and_assert_no_replies(self.pg1, p1, "ARP reply") |
| |
| # |
| # IP packet destined for pg1 remote host arrives on pg0 again. |
| # VPP should have an ARP entry for that address now and the packet |
| # should be sent out pg1. |
| # |
| rx1 = self.send_and_expect(self.pg0, [p0], self.pg1) |
| |
| self.verify_ip(rx1[0], |
| self.pg1.local_mac, |
| "00:00:5e:00:01:09", |
| self.pg0.remote_ip4, |
| self.pg1.remote_ip4) |
| |
| self.pg1.admin_down() |
| self.pg1.admin_up() |
| |
| def test_arp_duplicates(self): |
| """ ARP Duplicates""" |
| |
| # |
| # Generate some hosts on the LAN |
| # |
| self.pg1.generate_remote_hosts(3) |
| |
| # |
| # Add host 1 on pg1 and pg2 |
| # |
| arp_pg1 = VppNeighbor(self, |
| self.pg1.sw_if_index, |
| self.pg1.remote_hosts[1].mac, |
| self.pg1.remote_hosts[1].ip4) |
| arp_pg1.add_vpp_config() |
| arp_pg2 = VppNeighbor(self, |
| self.pg2.sw_if_index, |
| self.pg2.remote_mac, |
| self.pg1.remote_hosts[1].ip4) |
| arp_pg2.add_vpp_config() |
| |
| # |
| # IP packet destined for pg1 remote host arrives on pg1 again. |
| # |
| p = (Ether(dst=self.pg0.local_mac, |
| src=self.pg0.remote_mac) / |
| IP(src=self.pg0.remote_ip4, |
| dst=self.pg1.remote_hosts[1].ip4) / |
| UDP(sport=1234, dport=1234) / |
| Raw()) |
| |
| self.pg0.add_stream(p) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx1 = self.pg1.get_capture(1) |
| |
| self.verify_ip(rx1[0], |
| self.pg1.local_mac, |
| self.pg1.remote_hosts[1].mac, |
| self.pg0.remote_ip4, |
| self.pg1.remote_hosts[1].ip4) |
| |
| # |
| # remove the duplicate on pg1 |
| # packet stream should generate ARPs out of pg1 |
| # |
| arp_pg1.remove_vpp_config() |
| |
| self.pg0.add_stream(p) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx1 = self.pg1.get_capture(1) |
| |
| self.verify_arp_req(rx1[0], |
| self.pg1.local_mac, |
| self.pg1.local_ip4, |
| self.pg1.remote_hosts[1].ip4) |
| |
| # |
| # Add it back |
| # |
| arp_pg1.add_vpp_config() |
| |
| self.pg0.add_stream(p) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx1 = self.pg1.get_capture(1) |
| |
| self.verify_ip(rx1[0], |
| self.pg1.local_mac, |
| self.pg1.remote_hosts[1].mac, |
| self.pg0.remote_ip4, |
| self.pg1.remote_hosts[1].ip4) |
| |
| def test_arp_static(self): |
| """ ARP Static""" |
| self.pg2.generate_remote_hosts(3) |
| |
| # |
| # Add a static ARP entry |
| # |
| static_arp = VppNeighbor(self, |
| self.pg2.sw_if_index, |
| self.pg2.remote_hosts[1].mac, |
| self.pg2.remote_hosts[1].ip4, |
| is_static=1) |
| static_arp.add_vpp_config() |
| |
| # |
| # Add the connected prefix to the interface |
| # |
| self.pg2.config_ip4() |
| |
| # |
| # We should now find the adj-fib |
| # |
| self.assertTrue(find_nbr(self, |
| self.pg2.sw_if_index, |
| self.pg2.remote_hosts[1].ip4, |
| is_static=1)) |
| self.assertTrue(find_route(self, |
| self.pg2.remote_hosts[1].ip4, |
| 32)) |
| |
| # |
| # remove the connected |
| # |
| self.pg2.unconfig_ip4() |
| |
| # |
| # put the interface into table 1 |
| # |
| self.pg2.set_table_ip4(1) |
| |
| # |
| # configure the same connected and expect to find the |
| # adj fib in the new table |
| # |
| self.pg2.config_ip4() |
| self.assertTrue(find_route(self, |
| self.pg2.remote_hosts[1].ip4, |
| 32, |
| table_id=1)) |
| |
| # |
| # clean-up |
| # |
| self.pg2.unconfig_ip4() |
| static_arp.remove_vpp_config() |
| self.pg2.set_table_ip4(0) |
| |
| def test_arp_incomplete(self): |
| """ ARP Incomplete""" |
| self.pg1.generate_remote_hosts(3) |
| |
| p0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / |
| IP(src=self.pg0.remote_ip4, |
| dst=self.pg1.remote_hosts[1].ip4) / |
| UDP(sport=1234, dport=1234) / |
| Raw()) |
| p1 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) / |
| IP(src=self.pg0.remote_ip4, |
| dst=self.pg1.remote_hosts[2].ip4) / |
| UDP(sport=1234, dport=1234) / |
| Raw()) |
| |
| # |
| # a packet to an unresolved destination generates an ARP request |
| # |
| rx = self.send_and_expect(self.pg0, [p0], self.pg1) |
| self.verify_arp_req(rx[0], |
| self.pg1.local_mac, |
| self.pg1.local_ip4, |
| self.pg1._remote_hosts[1].ip4) |
| |
| # |
| # add a neighbour for remote host 1 |
| # |
| static_arp = VppNeighbor(self, |
| self.pg1.sw_if_index, |
| self.pg1.remote_hosts[1].mac, |
| self.pg1.remote_hosts[1].ip4, |
| is_static=1) |
| static_arp.add_vpp_config() |
| |
| # |
| # change the interface's MAC |
| # |
| mac = [scapy.compat.chb(0x00), scapy.compat.chb(0x00), |
| scapy.compat.chb(0x00), scapy.compat.chb(0x33), |
| scapy.compat.chb(0x33), scapy.compat.chb(0x33)] |
| mac_string = ''.join(mac) |
| |
| self.vapi.sw_interface_set_mac_address(self.pg1.sw_if_index, |
| mac_string) |
| |
| # |
| # now ARP requests come from the new source mac |
| # |
| rx = self.send_and_expect(self.pg0, [p1], self.pg1) |
| self.verify_arp_req(rx[0], |
| "00:00:00:33:33:33", |
| self.pg1.local_ip4, |
| self.pg1._remote_hosts[2].ip4) |
| |
| # |
| # packets to the resolved host also have the new source mac |
| # |
| rx = self.send_and_expect(self.pg0, [p0], self.pg1) |
| self.verify_ip(rx[0], |
| "00:00:00:33:33:33", |
| self.pg1.remote_hosts[1].mac, |
| self.pg0.remote_ip4, |
| self.pg1.remote_hosts[1].ip4) |
| |
| # |
| # set the mac address on the interface that does not have a |
| # configured subnet and thus no glean |
| # |
| self.vapi.sw_interface_set_mac_address(self.pg2.sw_if_index, |
| mac_string) |
| |
| def test_garp(self): |
| """ GARP """ |
| |
| # |
| # Generate some hosts on the LAN |
| # |
| self.pg1.generate_remote_hosts(4) |
| |
| # |
| # And an ARP entry |
| # |
| arp = VppNeighbor(self, |
| self.pg1.sw_if_index, |
| self.pg1.remote_hosts[1].mac, |
| self.pg1.remote_hosts[1].ip4) |
| arp.add_vpp_config() |
| |
| self.assertTrue(find_nbr(self, |
| self.pg1.sw_if_index, |
| self.pg1.remote_hosts[1].ip4, |
| mac=self.pg1.remote_hosts[1].mac)) |
| |
| # |
| # Send a GARP (request) to swap the host 1's address to that of host 2 |
| # |
| p1 = (Ether(dst="ff:ff:ff:ff:ff:ff", |
| src=self.pg1.remote_hosts[2].mac) / |
| ARP(op="who-has", |
| hwdst=self.pg1.local_mac, |
| hwsrc=self.pg1.remote_hosts[2].mac, |
| pdst=self.pg1.remote_hosts[1].ip4, |
| psrc=self.pg1.remote_hosts[1].ip4)) |
| |
| self.pg1.add_stream(p1) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| self.assertTrue(find_nbr(self, |
| self.pg1.sw_if_index, |
| self.pg1.remote_hosts[1].ip4, |
| mac=self.pg1.remote_hosts[2].mac)) |
| |
| # |
| # Send a GARP (reply) to swap the host 1's address to that of host 3 |
| # |
| p1 = (Ether(dst="ff:ff:ff:ff:ff:ff", |
| src=self.pg1.remote_hosts[3].mac) / |
| ARP(op="is-at", |
| hwdst=self.pg1.local_mac, |
| hwsrc=self.pg1.remote_hosts[3].mac, |
| pdst=self.pg1.remote_hosts[1].ip4, |
| psrc=self.pg1.remote_hosts[1].ip4)) |
| |
| self.pg1.add_stream(p1) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| self.assertTrue(find_nbr(self, |
| self.pg1.sw_if_index, |
| self.pg1.remote_hosts[1].ip4, |
| mac=self.pg1.remote_hosts[3].mac)) |
| |
| # |
| # GARPs (request nor replies) for host we don't know yet |
| # don't result in new neighbour entries |
| # |
| p1 = (Ether(dst="ff:ff:ff:ff:ff:ff", |
| src=self.pg1.remote_hosts[3].mac) / |
| ARP(op="who-has", |
| hwdst=self.pg1.local_mac, |
| hwsrc=self.pg1.remote_hosts[3].mac, |
| pdst=self.pg1.remote_hosts[2].ip4, |
| psrc=self.pg1.remote_hosts[2].ip4)) |
| |
| self.pg1.add_stream(p1) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| self.assertFalse(find_nbr(self, |
| self.pg1.sw_if_index, |
| self.pg1.remote_hosts[2].ip4)) |
| |
| p1 = (Ether(dst="ff:ff:ff:ff:ff:ff", |
| src=self.pg1.remote_hosts[3].mac) / |
| ARP(op="is-at", |
| hwdst=self.pg1.local_mac, |
| hwsrc=self.pg1.remote_hosts[3].mac, |
| pdst=self.pg1.remote_hosts[2].ip4, |
| psrc=self.pg1.remote_hosts[2].ip4)) |
| |
| self.pg1.add_stream(p1) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| self.assertFalse(find_nbr(self, |
| self.pg1.sw_if_index, |
| self.pg1.remote_hosts[2].ip4)) |
| |
| def test_arp_incomplete(self): |
| """ Incomplete Entries """ |
| |
| # |
| # ensure that we throttle the ARP and ND requests |
| # |
| self.pg0.generate_remote_hosts(2) |
| |
| # |
| # IPv4/ARP |
| # |
| ip_10_0_0_1 = VppIpRoute(self, "10.0.0.1", 32, |
| [VppRoutePath(self.pg0.remote_hosts[1].ip4, |
| self.pg0.sw_if_index)]) |
| ip_10_0_0_1.add_vpp_config() |
| |
| p1 = (Ether(dst=self.pg1.local_mac, |
| src=self.pg1.remote_mac) / |
| IP(src=self.pg1.remote_ip4, |
| dst="10.0.0.1") / |
| UDP(sport=1234, dport=1234) / |
| Raw()) |
| |
| self.pg1.add_stream(p1 * 257) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| rx = self.pg0._get_capture(1) |
| |
| # |
| # how many we get is going to be dependent on the time for packet |
| # processing but it should be small |
| # |
| self.assertLess(len(rx), 64) |
| |
| # |
| # IPv6/ND |
| # |
| ip_10_1 = VppIpRoute(self, "10::1", 128, |
| [VppRoutePath(self.pg0.remote_hosts[1].ip6, |
| self.pg0.sw_if_index, |
| proto=DpoProto.DPO_PROTO_IP6)]) |
| ip_10_1.add_vpp_config() |
| |
| p1 = (Ether(dst=self.pg1.local_mac, |
| src=self.pg1.remote_mac) / |
| IPv6(src=self.pg1.remote_ip6, |
| dst="10::1") / |
| UDP(sport=1234, dport=1234) / |
| Raw()) |
| |
| self.pg1.add_stream(p1 * 257) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| rx = self.pg0._get_capture(1) |
| |
| # |
| # how many we get is going to be dependent on the time for packet |
| # processing but it should be small |
| # |
| self.assertLess(len(rx), 64) |
| |
| def test_arp_forus(self): |
| """ ARP for for-us """ |
| |
| # |
| # Test that VPP responds with ARP requests to addresses that |
| # are connected and local routes. |
| # Use one of the 'remote' addresses in the subnet as a local address |
| # The intention of this route is that it then acts like a secondary |
| # address added to an interface |
| # |
| self.pg0.generate_remote_hosts(2) |
| |
| forus = VppIpRoute( |
| self, self.pg0.remote_hosts[1].ip4, 32, |
| [VppRoutePath("0.0.0.0", |
| self.pg0.sw_if_index, |
| type=FibPathType.FIB_PATH_TYPE_LOCAL)]) |
| forus.add_vpp_config() |
| |
| p = (Ether(dst="ff:ff:ff:ff:ff:ff", |
| src=self.pg0.remote_mac) / |
| ARP(op="who-has", |
| hwdst=self.pg0.local_mac, |
| hwsrc=self.pg0.remote_mac, |
| pdst=self.pg0.remote_hosts[1].ip4, |
| psrc=self.pg0.remote_ip4)) |
| |
| rx = self.send_and_expect(self.pg0, [p], self.pg0) |
| |
| self.verify_arp_resp(rx[0], |
| self.pg0.local_mac, |
| self.pg0.remote_mac, |
| 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 """ |
| |
| @classmethod |
| def setUpClass(cls): |
| super(NeighborStatsTestCase, cls).setUpClass() |
| |
| @classmethod |
| def tearDownClass(cls): |
| super(NeighborStatsTestCase, cls).tearDownClass() |
| |
| def setUp(self): |
| super(NeighborStatsTestCase, self).setUp() |
| |
| self.create_pg_interfaces(range(2)) |
| |
| # 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(NeighborStatsTestCase, self).tearDown() |
| |
| for i in self.pg_interfaces: |
| i.unconfig_ip4() |
| i.unconfig_ip6() |
| i.admin_down() |
| |
| def test_arp_stats(self): |
| """ ARP Counters """ |
| |
| self.vapi.cli("adj counters enable") |
| self.pg1.generate_remote_hosts(2) |
| |
| arp1 = VppNeighbor(self, |
| self.pg1.sw_if_index, |
| self.pg1.remote_hosts[0].mac, |
| self.pg1.remote_hosts[0].ip4) |
| arp1.add_vpp_config() |
| arp2 = VppNeighbor(self, |
| self.pg1.sw_if_index, |
| self.pg1.remote_hosts[1].mac, |
| self.pg1.remote_hosts[1].ip4) |
| arp2.add_vpp_config() |
| |
| p1 = (Ether(dst=self.pg0.local_mac, |
| src=self.pg0.remote_mac) / |
| IP(src=self.pg0.remote_ip4, |
| dst=self.pg1.remote_hosts[0].ip4) / |
| UDP(sport=1234, dport=1234) / |
| Raw()) |
| p2 = (Ether(dst=self.pg0.local_mac, |
| src=self.pg0.remote_mac) / |
| IP(src=self.pg0.remote_ip4, |
| dst=self.pg1.remote_hosts[1].ip4) / |
| UDP(sport=1234, dport=1234) / |
| Raw()) |
| |
| rx = self.send_and_expect(self.pg0, p1 * NUM_PKTS, self.pg1) |
| rx = self.send_and_expect(self.pg0, p2 * NUM_PKTS, self.pg1) |
| |
| self.assertEqual(NUM_PKTS, arp1.get_stats()['packets']) |
| self.assertEqual(NUM_PKTS, arp2.get_stats()['packets']) |
| |
| rx = self.send_and_expect(self.pg0, p1 * NUM_PKTS, self.pg1) |
| self.assertEqual(NUM_PKTS*2, arp1.get_stats()['packets']) |
| |
| def test_nd_stats(self): |
| """ ND Counters """ |
| |
| self.vapi.cli("adj counters enable") |
| self.pg0.generate_remote_hosts(3) |
| |
| nd1 = VppNeighbor(self, |
| self.pg0.sw_if_index, |
| self.pg0.remote_hosts[1].mac, |
| self.pg0.remote_hosts[1].ip6) |
| nd1.add_vpp_config() |
| nd2 = VppNeighbor(self, |
| self.pg0.sw_if_index, |
| self.pg0.remote_hosts[2].mac, |
| self.pg0.remote_hosts[2].ip6) |
| nd2.add_vpp_config() |
| |
| p1 = (Ether(dst=self.pg1.local_mac, |
| src=self.pg1.remote_mac) / |
| IPv6(src=self.pg1.remote_ip6, |
| dst=self.pg0.remote_hosts[1].ip6) / |
| UDP(sport=1234, dport=1234) / |
| Raw()) |
| p2 = (Ether(dst=self.pg1.local_mac, |
| src=self.pg1.remote_mac) / |
| IPv6(src=self.pg1.remote_ip6, |
| dst=self.pg0.remote_hosts[2].ip6) / |
| UDP(sport=1234, dport=1234) / |
| Raw()) |
| |
| rx = self.send_and_expect(self.pg1, p1 * 16, self.pg0) |
| rx = self.send_and_expect(self.pg1, p2 * 16, self.pg0) |
| |
| self.assertEqual(16, nd1.get_stats()['packets']) |
| self.assertEqual(16, nd2.get_stats()['packets']) |
| |
| rx = self.send_and_expect(self.pg1, p1 * NUM_PKTS, self.pg0) |
| 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) |