ligang/vpp
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
vpp/test/test_neighbor.py
Neale Ranns c819fc612f Allow providers to override glean behaviour 
and update glean address on local interface MAC change

Change-Id: I530826d60c7e9db2b0fa2d45754139d82c5ea807
Signed-off-by: Neale Ranns <neale.ranns@cisco.com>
2018-02-16 02:44:08 -08:00

1220 lines
42 KiB
Python
Raw Blame History

#!/usr/bin/env python
import unittest
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
from scapy.packet import Raw
from scapy.layers.l2 import Ether, ARP, Dot1Q
from scapy.layers.inet import IP, UDP
from scapy.contrib.mpls import MPLS
# not exported by scapy, so redefined here
arp_opts = {"who-has": 1, "is-at": 2}
class ARPTestCase(VppTestCase):
""" ARP Test Case """
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)
#
# 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()
#
# 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()
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)
#
# 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)
#
# 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)
#
# 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 hierachy 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 prxied address
# 2c - not within a differents 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
#
dyn_arp.remove_vpp_config()
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_ip4n_subnet,
self.pg0._local_ip4n_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_ip4n_subnet,
self.pg0._local_ip4n_bcast,
is_add=0)
def test_proxy_arp(self):
""" Proxy ARP """
self.pg1.generate_remote_hosts(2)
#
# Proxy ARP rewquest 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 reoute 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('\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())
self.pg0.add_stream(p0)
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_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.pg1.add_stream(p1)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
#
# 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.
#
self.pg0.add_stream(p0)
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,
"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 shoud 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()
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 = [chr(0x00), chr(0x00), chr(0x00),
chr(0x33), chr(0x33), chr(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 inteface 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)
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
Reference in New Issue View Git Blame Copy Permalink